Merge commit '551497ef94f6239b109316d8fab32f0909b13f73' as 'mod/less'

67 files changed, 8229 insertions, 0 deletions

diff --git a/mod/less/manifest.xml b/mod/less/manifest.xml
new file mode 100644
index 000000000..481c7f509
--- /dev/null
+++ b/mod/less/manifest.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<plugin_manifest xmlns="http://www.elgg.org/plugin_manifest/1.8">
+	<name>LESS (the Dynamic Stylesheet Language) Complier</name>
+	<author>Lorea developers</author>
+	<version>0.1</version>
+	<category>tool</category>
+	<description>Brings the power of LESS dynamic styling to Elgg</description>
+	<website>http://lorea.org/</website>
+	<copyright>(C) Lorea 2012</copyright>
+	<license>GNU General Public License version 2</license>
+	<requires>
+		<type>elgg_release</type>
+		<version>1.8</version>
+	</requires>
+	<activate_on_install>false</activate_on_install>
+</plugin_manifest>
diff --git a/mod/less/start.php b/mod/less/start.php
new file mode 100644
index 000000000..476ad5104
--- /dev/null
+++ b/mod/less/start.php
@@ -0,0 +1,104 @@
+<?php
+/**
+ * Elgg LESS compiler
+ *
+ * @package ElggLESS
+ */
+
+elgg_register_event_handler('init', 'system', 'less_init');
+
+function less_init() {
+	
+	less_override_css();
+	
+	//make sure this runs after everyone else is done
+	elgg_register_plugin_hook_handler('view', 'all', 'less_views', 999);
+}
+
+function less_views($hook, $type, $content, $params) {
+	$view = $params['view'];
+	$vars = $params['vars'];
+	
+	if (preg_match("/^css\//", $view) && !$vars['less_flag']) {
+		global $CONFIG;
+		if ($CONFIG->less->view[$view]) {
+			$vars['less_flag'] = true;
+			$content = elgg_view($CONFIG->less->view[$view], $vars);
+		}
+	}
+	
+	if (preg_match("/^less\//", $view) && $vars['less_flag']) {
+		if (include_once(elgg_get_plugins_path() . 'less/vendors/lessphp/lessc.inc.php')) {
+			$parser = new lessc();
+			return $parser->parse($content);
+		}
+	}
+	return $content;
+}
+
+function less_override_css() {
+	$plugins = elgg_get_plugins('active');
+	if ($plugins) {
+		foreach ($plugins as $plugin) {
+			$view_dir = elgg_get_plugins_path() . $plugin->getID() . "/views/";
+
+			if (!is_dir($view_dir) || FALSE === ($handle = opendir($view_dir))) {
+				continue;
+			}
+
+			while (FALSE !== ($view_type = readdir($handle))) {
+				$view_type_dir = $view_dir . $view_type;
+
+				if ('.' !== substr($view_type, 0, 1) && is_dir($view_type_dir)) {
+					less_autoregister_views('', $view_type_dir, $view_dir, $view_type);
+				}
+			}
+		}
+	}
+}
+
+function less_autoregister_views($view_base, $folder, $base_location_path, $viewtype) {
+	if (!empty($view_base)) {
+		$view_base_new = $view_base . "/";
+	} else {
+		$view_base_new = "";
+	}
+	
+	if ($handle = opendir($folder)) {
+		while ($view = readdir($handle)) {
+			if (!in_array($view, array('.', '..', '.svn', 'CVS')) && !is_dir($folder . "/" . $view)) {
+				if (substr_count($view, ".php") > 0) {
+					less_update_view($view_base_new . str_replace('.php', '', $view));
+				}
+			} else if (!in_array($view, array('.', '..', '.svn', 'CVS')) && is_dir($folder . "/" . $view)) {
+				if ($view == 'css' || $view == 'less') {
+					less_autoregister_views($view_base_new . $view, $folder . "/" . $view,
+						$base_location_path, $viewtype);
+				}
+			}
+		}
+		return TRUE;
+	}
+	return FALSE;
+}
+
+function less_update_view($view) {
+	global $CONFIG;
+	
+	if (substr($view, 0, 5) == "less/") {
+		$css_view = substr($view, 5);
+	} else {
+		$css_view = $view;
+	}
+
+	if (!isset($CONFIG->less)) {
+		$CONFIG->less = new stdClass;
+	}
+
+	if (!isset($CONFIG->less->view)) {
+		$CONFIG->less->view = array($css_view => $view);
+
+	} else {
+		$CONFIG->less->view[$css_view] = $view;
+	}
+}
diff --git a/mod/less/vendors/lessphp/.gitignore b/mod/less/vendors/lessphp/.gitignore
new file mode 100644
index 000000000..ed09d55dc
--- /dev/null
+++ b/mod/less/vendors/lessphp/.gitignore
@@ -0,0 +1,8 @@
+*.swp
+*~
+/*.less
+/*.css
+tests/bootstrap
+tests/tmp
+vendor
+composer.lock
diff --git a/mod/less/vendors/lessphp/LICENSE b/mod/less/vendors/lessphp/LICENSE
new file mode 100644
index 000000000..b2338b1c8
--- /dev/null
+++ b/mod/less/vendors/lessphp/LICENSE
@@ -0,0 +1,660 @@
+For ease of distribution, lessphp 0.2.0 is under a dual license.
+You are free to pick which one suits your needs.
+
+
+
+
+MIT LICENSE
+
+
+
+
+Copyright (c) 2010 Leaf Corcoran, http://leafo.net/lessphp
+ 
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+ 
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+ 
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+
+
+GPL VERSION 3
+
+
+
+
+					GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+
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+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
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+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
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+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
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+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
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+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
diff --git a/mod/less/vendors/lessphp/README.md b/mod/less/vendors/lessphp/README.md
new file mode 100644
index 000000000..b48850038
--- /dev/null
+++ b/mod/less/vendors/lessphp/README.md
@@ -0,0 +1,69 @@
+# lessphp v0.3.5
+### <http://leafo.net/lessphp>
+
+`lessphp` is a compiler for LESS written in PHP. The documentation is great,
+so check it out: <http://leafo.net/lessphp/docs/>.
+
+Here's a quick tutorial:
+
+### How to use in your PHP project
+
+Copy `lessc.inc.php` to your include directory and include it into your project.
+
+There are a few ways to interface with the compiler. The easiest is to have it
+compile a LESS file when the page is requested. The static function 
+`lessc::ccompile`, checked compile, will compile the input LESS file only when it
+is newer than the output file.
+
+	try {
+		lessc::ccompile('input.less', 'output.css');
+	} catch (exception $ex) {
+		exit($ex->getMessage());
+	}
+
+`lessc::ccompile` is not aware of imported files that change. Read [about
+`lessc::cexecute`](http://leafo.net/lessphp/docs/#compiling_automatically).
+
+Note that all failures with lessc are reported through exceptions.
+If you need more control you can make your own instance of lessc.
+
+	$input = 'mystyle.less';
+
+	$lc = new lessc($input);
+
+	try {
+		file_put_contents('mystyle.css', $lc->parse());
+	} catch (exception $ex) { ... }
+
+In addition to loading from file, you can also parse from a string like so:
+
+	$lc = new lessc();
+	$lesscode = 'body { ... }';
+	$out = $lc->parse($lesscode);
+
+### How to use from the command line
+
+An additional script has been included to use the compiler from the command
+line. In the simplest invocation, you specify an input file and the compiled
+css is written to standard out:
+
+	$ plessc input.less > output.css
+
+Using the -r flag, you can specify LESS code directly as an argument or, if 
+the argument is left off, from standard in:
+
+	$ plessc -r "my less code here"
+
+Finally, by using the -w flag you can watch a specified input file and have it 
+compile as needed to the output file
+
+	$ plessc -w input-file output-file
+
+Errors from watch mode are written to standard out.
+
+`lessphp` also supports output formatters. To compress the output run this:
+
+	$ plessc -f=compressed myfile.less
+
+For more help, run `plessc --help`
+
diff --git a/mod/less/vendors/lessphp/composer.json b/mod/less/vendors/lessphp/composer.json
new file mode 100644
index 000000000..5a29a284a
--- /dev/null
+++ b/mod/less/vendors/lessphp/composer.json
@@ -0,0 +1,20 @@
+{
+    "name": "leafo/lessphp",
+    "type": "library",
+    "description": "lessphp is a compiler for LESS written in PHP.",
+    "homepage": "http://leafo.net/lessphp/",
+    "license": [
+      "MIT",
+      "GPL-3.0"
+    ],
+    "authors": [
+        {
+            "name": "Leaf Corcoran",
+            "email": "leafot@gmail.com",
+            "homepage": "http://leafo.net"
+        }
+    ],
+    "autoload": {
+        "classmap": ["lessc.inc.php"]
+    }
+}
diff --git a/mod/less/vendors/lessphp/docs/docs.md b/mod/less/vendors/lessphp/docs/docs.md
new file mode 100644
index 000000000..c46ad0fe1
--- /dev/null
+++ b/mod/less/vendors/lessphp/docs/docs.md
@@ -0,0 +1,1168 @@
+    title: v0.3.5 documentation
+    link_to_home: true
+--
+
+<h2 skip="true">Documentation v0.3.5</h2>
+
+<div style="margin-bottom: 1em;">$index</div>
+
+**lessphp** is a compiler that generates CSS from a superset language which
+adds a collection of convenient features often seen in other languages. All CSS
+is compatible with LESS, so you can start using new features with your existing CSS.
+
+It is designed to be compatible with [less.js](http://lesscss.org), and suitable
+as a drop in replacement for PHP projects.
+
+## Getting Started
+
+The homepage for **lessphp** can be found at [http://leafo.net/lessphp/][1].
+
+You can follow development at the project's [GitHub][2].
+
+Including **lessphp** in your project is as simple as dropping the single
+include file into your code base and running the appropriate compile method as
+described in the [PHP Interface](#php_interface).
+
+  [1]: http://leafo.net/lessphp "lessphp homepage"
+  [2]: https://github.com/leafo/lessphp "lessphp GitHub page"
+
+## Installation
+
+**lessphp** is distributed entirely in a single stand-alone file. Download the
+latest version from either [the homepage][1] or [GitHub][2].
+
+Development versions can also be downloading from GitHub.
+
+Place `lessphp.inc.php` in a location available to your PHP scripts, and
+include it. That's it! you're ready to begin.
+
+## The Language
+
+**lessphp** is very easy to learn because it generally functions how you would
+expect it to. If you feel something is challenging or missing, feel free to
+open an issue on the [bug tracker](https://github.com/leafo/lessphp/issues).
+
+It is also easy to learn because any standards-compliant CSS code is valid LESS
+code. You are free to gradually enhance your existing CSS code base with LESS
+features without having to worry about rewriting anything.
+
+The following is a description of the new languages features provided by LESS.
+
+### Line Comments
+
+Simple but very useful; line comments are started with `//`:
+
+    ```less
+    // this is a comment
+    body {
+      color: red; // as is this
+      /* block comments still work also */
+    }
+    ```
+
+### Variables
+Variables are identified with a name that starts with `@`. To declare a
+variable, you create an appropriately named CSS property and assign it a value:
+
+    ```less
+    @family: "verdana";
+    @color: red;
+    body {
+      @mycolor: red;
+      font-family: @family;
+      color: @color;
+      border-bottom: 1px solid @color;
+    }
+    ```
+
+Variable declarations will not appear in the output. Variables can be declared
+in the outer most scope of the file, or anywhere else a CSS property may
+appear. They can hold any CSS property value.
+
+Variables are only visible for use from their current scope, or any enclosed
+scopes.
+
+If you have a string or keyword in a variable, you can reference another
+variable by that name by repeating the `@`:
+
+    ```less
+    @value: 20px;
+    @value_name: "value";
+
+    width: @@value_name;
+    ```
+
+### Expressions
+
+Expressions let you combine values and variables in meaningful ways. For
+example you can add to a color to make it a different shade. Or divide up the
+width of your layout logically. You can even concatenate strings.
+
+Use the mathematical operators to evaluate an expression:
+
+    ```less
+    @width: 960px;
+    .nav {
+      width: @width / 3;
+      color: #001 + #abc;
+    }
+    .body {
+      width: 2 * @width / 3;
+      font-family: "hel" + "vetica";
+    }
+    ```
+
+Parentheses can be used to control the order of evaluation. They can also be
+used to force an evaluation for cases where CSS's syntax makes the expression
+ambiguous.
+
+The following property will produce two numbers, instead of doing the
+subtraction:
+
+    ```less
+    margin: 10px -5px;
+    ```
+
+To force the subtraction:
+
+    ```less
+    margin: (10px -5px);
+    ```
+
+It is also safe to surround mathematical operators by spaces to ensure that
+they are evaluated:
+
+    ```less
+    margin: 10px - 5px;
+    ```
+
+Division has a special quirk. There are certain CSS properties that use the `/`
+operator as part of their value's syntax. Namely, the [font][4] shorthand and
+[border-radius][3].
+
+  [3]: https://developer.mozilla.org/en/CSS/border-radius
+  [4]: https://developer.mozilla.org/en/CSS/font
+
+
+Thus, **lessphp** will ignore any division in these properties unless it is
+wrapped in parentheses. For example, no division will take place here:
+
+    ```less
+    .font {
+      font: 20px/80px "Times New Roman";
+    }
+    ```
+
+In order to force division we must wrap the expression in parentheses:
+
+    ```less
+    .font {
+      font: (20px/80px) "Times New Roman";
+    }
+    ```
+
+If you want to write a literal `/` expression without dividing in another
+property (or a variable), you can use [string unquoting](#string_unquoting):
+
+    ```less
+    .var {
+      @size: ~"20px/80px";
+      font: @size sans-serif;
+    }
+    ```
+
+### Nested Blocks
+
+By nesting blocks we can build up a chain of CSS selectors through scope
+instead of repeating them. In addition to reducing repetition, this also helps
+logically organize the structure of our CSS.
+
+    ```less
+    ol.list {
+      li.special {
+        border: 1px solid red;
+      }
+
+      li.plain {
+        font-weight: bold;
+      }
+    }
+    ```
+
+
+This will produce two blocks, a `ol.list li.special` and `ol.list li.plain`.
+
+Blocks can be nested as deep as required in order to build a hierarchy of
+relationships.
+
+The `&` operator can be used in a selector to represent its parent's selector.
+If the `&` operator is used, then the default action of appending the parent to
+the front of the child selector separated by space is not performed.
+
+    ```less
+    b {
+      a & {
+        color: red;
+      }
+
+      // the following have the same effect
+
+      & i {
+        color: blue;
+      }
+
+      i {
+        color: blue;
+      }
+    }
+    ```
+
+
+Because the `&` operator respects the whitespace around it, we can use it to
+control how the child blocks are joined. Consider the differences between the
+following:
+
+    ```less
+    div {
+      .child-class { color: purple; }
+
+      &.isa-class { color: green; }
+
+      #child-id { height: 200px; }
+
+      &#div-id { height: 400px; }
+
+      &:hover { color: red; }
+
+      :link { color: blue; }
+    }
+    ```
+
+The `&` operator also works with [mixins](#mixins), which produces interesting results:
+
+    ```less
+    .within_box_style() {
+      .box & {
+        color: blue;
+      }
+    }
+
+    #menu {
+      .within_box_style;
+    }
+    ```
+
+### Mixins
+
+Any block can be mixed in just by naming it:
+
+    ```less
+    .mymixin {
+      color: blue;
+      border: 1px solid red;
+
+      .special {
+        font-weight: bold;
+      }
+    }
+
+
+    h1 {
+      font-size: 200px;
+      .mixin;
+    }
+    ```
+
+All properties and child blocks are mixed in.
+
+Mixins can be made parametric, meaning they can take arguments, in order to
+enhance their utility. A parametric mixin all by itself is not outputted when
+compiled. Its properties will only appear when mixed into another block.
+
+The canonical example is to create a rounded corners mixin that works across
+browsers:
+
+    ```less
+    .rounded-corners(@radius: 5px) {
+      border-radius: @radius;
+      -webkit-border-radius: @radius;
+      -moz-border-radius: @radius;
+    }
+
+    .header {
+      .rounded-corners();
+    }
+
+    .info {
+      background: red;
+      .rounded-corners(14px);
+    }
+    ```
+
+If you have a mixin that doesn't have any arguments, but you don't want it to
+show up in the output, give it a blank argument list:
+
+    ```less
+    .secret() {
+      font-size: 6000px;
+    }
+
+    .div {
+      .secret;
+    }
+    ```
+
+If the mixin doesn't need any arguments, you can leave off the parentheses when
+mixing it in, as seen above.
+
+You can also mixin a block that is nested inside other blocks. You can think of
+the outer block as a way of making a scope for your mixins. You just list the
+names of the mixins separated by spaces, which describes the path to the mixin
+you want to include. Optionally you can separate them by `>`.
+
+    ```less
+    .my_scope  {
+      .some_color {
+        color: red;
+        .inner_block {
+          text-decoration: underline;
+        }
+      }
+      .bold {
+        font-weight: bold;
+        color: blue;
+      }
+    }
+
+    .a_block {
+      .my_scope .some_color;
+      .my_scope .some_color .inner_block;
+    }
+
+    .another_block {
+      // the alternative syntax
+      .my_scope > .bold;
+    }
+    ```
+
+#### `@arguments` Variable
+
+Within an mixin there is a special variable named `@arguments` that contains
+all the arguments passed to the mixin along with any remaining arguments that
+have default values. The value of the variable has all the values separated by
+spaces.
+
+This useful for quickly assigning all the arguments:
+
+    ```less
+    .box-shadow(@x, @y, @blur, @color) {
+      box-shadow: @arguments;
+      -webkit-box-shadow: @arguments;
+      -moz-box-shadow: @arguments;
+    }
+    .menu {
+      .box-shadow(1px, 1px, 5px, #aaa);
+    }
+    ```
+
+In addition to the arguments passed to the mixin, `@arguments` will also include
+remaining default values assigned by the mixin:
+
+
+    ```less
+    .border-mixin(@width, @style: solid, @color: black) {
+      border: @arguments;
+    }
+
+    pre {
+      .border-mixin(4px, dotted);
+    }
+
+    ```
+
+
+#### Pattern Matching
+
+When you *mix in* a mixin, all the available mixins of that name in the current
+scope are checked to see if they match based on what was passed to the mixin
+and how it was declared.
+
+The simplest case is matching by number of arguments. Only the mixins that
+match the number of arguments passed in are used.
+
+    ```less
+    .simple() { // matches no arguments
+      height: 10px;
+    }
+
+    .simple(@a, @b) { // matches two arguments
+      color: red;
+    }
+
+    .simple(@a) { // matches one argument
+      color: blue;
+    }
+
+    div {
+      .simple(10);
+    }
+
+    span {
+      .simple(10, 20);
+    }
+    ```
+
+Whether an argument has default values is also taken into account when matching
+based on number of arguments:
+
+    ```less
+    // matches one or two arguments
+    .hello(@a, @b: blue) {
+      height: @a;
+      color: @b;
+    }
+
+    .hello(@a, @b) { // matches only two
+      width: @a;
+      border-color: @b;
+    }
+
+    .hello(@a) { // matches only one
+      padding: 1em;
+    }
+
+    div {
+      .hello(10px);
+    }
+
+    pre {
+      .hello(10px, yellow);
+    }
+    ```
+
+Additionally, a *vararg* value can be used to further control how things are
+matched.  A mixin's argument list can optionally end in the special argument
+named `...`.  The `...` may match any number of arguments, including 0.
+
+    ```less
+    // this will match any number of arguments
+    .first(...) {
+      color: blue;
+    }
+
+    // matches at least 1 argument
+    .second(@arg, ...) {
+      height: 200px + @arg;
+    }
+
+    div { .first("some", "args"); }
+    pre { .second(10px); }
+    ```
+
+If you want to capture the values that get captured by the *vararg* you can
+give it a variable name by putting it directly before the `...`. This variable
+must be the last argument defined. It's value is just like the special
+[`@arguments` variable](#arguments_variable), a space separated list.
+
+
+    ```less
+    .hello(@first, @rest...) {
+      color: @first;
+      text-shadow: @rest;
+    }
+
+    span {
+      .hello(red, 1px, 1px, 0px, white);
+    }
+
+    ```
+
+Another way of controlling whether a mixin matches is by specifying a value in
+place of an argument name when declaring the mixin:
+
+    ```less
+    .style(old, @size) {
+      font: @size serif;
+    }
+
+    .style(new, @size) {
+      font: @size sans-serif;
+    }
+
+    .style(@_, @size) {
+      letter-spacing: floor(@size / 6px);
+    }
+
+    em {
+      @switch: old;
+      .style(@switch, 15px);
+    }
+    ```
+
+Notice that two of the three mixins were matched. The mixin with a matching
+first argument, and the generic mixin that matches two arguments. It's common
+to use `@_` as the name of a variable we intend to not use. It has no special
+meaning to LESS, just to the reader of the code.
+
+#### Guards
+
+Another way of restricting when a mixin is mixed in is by using guards. A guard
+is a special expression that is associated with a mixin declaration that is
+evaluated during the mixin process. It must evaluate to true before the mixin
+can be used.
+
+We use the `when` keyword to begin describing a list of guard expressions.
+
+Here's a simple example:
+
+    ```less
+    .guarded(@arg) when (@arg = hello) {
+      color: blue;
+    }
+
+    div {
+      .guarded(hello); // match
+    }
+
+    span {
+      .guarded(world); // no match
+    }
+    ```
+Only the `div`'s mixin will match in this case, because the guard expression
+requires that `@arg` is equal to `hello`.
+
+We can include many different guard expressions by separating them by commas.
+Only one of them needs to match to trigger the mixin:
+
+    ```less
+    .x(@a, @b) when (@a = hello), (@b = world) {
+      width: 960px;
+    }
+
+    div {
+      .x(hello, bar); // match
+    }
+
+    span {
+      .x(foo, world); // match
+    }
+
+    pre {
+      .x(foo, bar); // no match
+    }
+    ```
+
+Instead of a comma, we can use `and` keyword to make it so all of the guards
+must match in order to trigger the mixin. `and` has higher precedence than the
+comma.
+
+    ```less
+    .y(@a, @b) when (@a = hello) and (@b = world) {
+      height: 600px;
+    }
+
+    div {
+      .y(hello, world); // match
+    }
+
+    span {
+      .y(hello, bar); // no match
+    }
+    ```
+
+Commas and `and`s can be mixed and matched.
+
+You can also negate a guard expression by using `not` in from of the parentheses:
+
+    ```less
+    .x(@a) when not (@a = hello) {
+      color: blue;
+    }
+
+    div {
+      .x(hello); // no match
+    }
+    ```
+
+The `=` operator is used to check equality between any two values. For numbers
+the following comparison operators are also defined:
+
+`<`, `>`, `=<`, `>=`
+
+There is also a collection of predicate functions that can be used to test the
+type of a value.
+
+These are `isnumber`, `iscolor`, `iskeyword`, `isstring`, `ispixel`,
+`ispercentage` and `isem`.
+
+    ```less
+    .mix(@a) when (ispercentage(@a)) {
+      height: 500px * @a;
+    }
+    .mix(@a) when (ispixel(@a)) {
+      height: @a;
+    }
+
+    div.a {
+      .mix(50%);
+    }
+
+    div.a {
+      .mix(350px);
+    }
+    ```
+
+#### !important
+
+If you want to apply the `!important` suffix to every property when mixing in a
+mixin, just append `!important` to the end of the call to the mixin:
+
+    ```less
+    .make_bright {
+      color: red;
+      font-weight: bold;
+    }
+
+    .color {
+      color: green;
+    }
+
+    body {
+      .make_bright() !important;
+      .color();
+    }
+
+    ```
+
+### Selector Expressions
+
+Sometimes we want to dynamically generate the selector of a block based on some
+variable or expression. We can do this by using *selector expressions*. Selector
+expressions are CSS selectors that are evaluated in the current scope before
+being written out.
+
+A simple example is a mixin that dynamically creates a selector named after the
+mixin's argument:
+
+    ```less
+    .create-selector(@name) {
+      (e(@name)) {
+        color: red;
+      }
+    }
+
+    .create-selector("hello");
+    .create-selector("world");
+    ```
+
+Any selector that is enclosed in `()` will have it's contents evaluated and
+directly written to output. The value is not changed any way before being
+outputted, thats why we use the `e` function. If you're not familiar, the `e`
+function strips quotes off a string value. If we didn't have it, then the
+selector would have quotes around it, and that's not valid CSS!
+
+Any value can be used in a selector expression, but it works best when using
+strings and things like [String Interpolation](#string_interpolation).
+
+Here's an interesting example adapted from Twitter Bootstrap. A couple advanced
+things are going on. We are using [Guards](#guards) along with a recursive
+mixin to work like a loop to generate a series of CSS blocks.
+
+
+    ```less
+    // create our recursive mixin:
+    .spanX (@index) when (@index > 0) {
+      (~".span@{index}") {
+        width: @index * 100px;
+      }
+      .spanX(@index - 1);
+    }
+    .spanX (0) {}
+
+    // mix it into the global scopee:
+    .spanX(4);
+    ```
+
+### Import
+
+Multiple LESS files can be compiled into a single CSS file by using the
+`@import` statement. Be careful, the LESS import statement shares syntax with
+the CSS import statement. If the file being imported ends in a `.less`
+extension, or no extension, then it is treated as a LESS import. Otherwise it
+is left alone and outputted directly:
+
+    ```less
+    // my_file.less
+    .some-mixin(@height) {
+      height: @height;
+    }
+
+    // main.less
+    @import "main.less" // will import the file if it can be found
+    @import "main.css" // will be left alone
+
+    body {
+      .some-mixin(400px);
+    }
+    ```
+
+All of the following lines are valid ways to import the same file:
+
+    ```less
+    @import "file";
+    @import 'file.less';
+    @import url("file");
+    @import url('file');
+    @import url(file);
+    ```
+
+When importing, the `importDir` is searched for files. This can be configured,
+see [PHP Interface](#php_interface).
+
+### String Interpolation
+
+String interpolation is a convenient way to insert the value of a variable
+right into a string literal. Given some variable named `@var_name`, you just
+need to write it as `@{var_name}` from within the string to have its value
+inserted:
+
+    ```less
+    @symbol: ">";
+    h1:before {
+      content: "@{symbol}: ";
+    }
+
+    h2:before {
+      content: "@{symbol}@{symbol}: ";
+    }
+    ```
+
+There are two kinds of strings, implicit and explicit strings. Explicit strings
+are wrapped by double quotes, `"hello I am a string"`, or single quotes `'I am
+another string'`. Implicit strings only appear when using `url()`. The text
+between the parentheses is considered a string and thus string interpolation is
+possible:
+
+    ```less
+    @path: "files/";
+    body {
+      background: url(@{path}my_background.png);
+    }
+    ```
+
+### String Format Function
+
+The `%` function can be used to insert values into strings using a *format
+string*. It works similar to `printf` seen in other languages. It has the
+same purpose as string interpolation above, but gives explicit control over
+the output format.
+
+    ```less
+    @symbol: ">";
+    h1:before {
+      content: %("%s: ", @symbol);
+    }
+    ```
+
+The `%` function takes as its first argument the format string, following any
+number of addition arguments that are inserted in place of the format
+directives.
+
+A format directive starts with a `%` and is followed by a single character that
+is either `a`, `d`, or `s`:
+
+    ```less
+    strings: %("%a %d %s %a", hi, 1, 'ok', 'cool');
+    ```
+
+`%a` and `%d` format the value the same way: they compile the argument to its
+CSS value and insert it directly. When used with a string, the quotes are
+included in the output. This typically isn't what we want, so we have the `%s`
+format directive which strips quotes from strings before inserting them.
+
+The `%d` directive functions the same as `%a`, but is typically used for numbers
+assuming the output format of numbers might change in the future.
+
+### String Unquoting
+
+Sometimes you will need to write proprietary CSS syntax that is unable to be
+parsed. As a workaround you can place the code into a string and unquote it.
+Unquoting is the process of outputting a string without its surrounding quotes.
+There are two ways to unquote a string.
+
+The `~` operator in front of a string will unquote that string:
+
+    ```less
+    .class {
+      // a made up, but problematic vendor specific CSS
+      filter: ~"Microsoft.AlphaImage(src='image.png')";
+    }
+    ```
+
+If you are working with other types, such as variables, there is a built in
+function that let's you unquote any value. It is called `e`.
+
+    ```less
+    @color: "red";
+    .class {
+      color: e(@color);
+    }
+    ```
+
+### Built In Functions
+
+**lessphp** has a collection of built in functions:
+
+* `e(str)` -- returns a string without the surrounding quotes.
+  See [String Unquoting](#string_unquoting)
+
+* `floor(number)` -- returns the floor of a numerical input
+* `round(number)` -- returns the rounded value of numerical input
+
+* `lighten(color, percent)` -- lightens `color` by `percent` and returns it
+* `darken(color, percent)` -- darkens `color` by `percent` and returns it
+
+* `saturate(color, percent)` -- saturates `color` by `percent` and returns it
+* `desaturate(color, percent)` -- desaturates `color` by `percent` and returns it
+
+* `fadein(color, percent)` -- makes `color` less transparent by `percent` and returns it
+* `fadeout(color, percent)` -- makes `color` more transparent by `percent` and returns it
+
+* `spin(color, amount)` -- returns a color with `amount` degrees added to hue
+
+* `fade(color, amount)` -- returns a color with the alpha set to `amount`
+
+* `hue(color)` -- returns the hue of `color`
+
+* `saturation(color)` -- returns the saturation of `color`
+
+* `lightness(color)` -- returns the lightness of `color`
+
+* `alpha(color)` -- returns the alpha value of `color` or 1.0 if it doesn't have an alpha
+
+* `percentage(number)` -- converts a floating point number to a percentage, e.g. `0.65` -> `65%`
+
+* `mix(color1, color1, percent)` -- mixes two colors by percentage where 100%
+  keeps all of `color1`, and 0% keeps all of `color2`. Will take into account
+  the alpha of the colors if it exists. See
+  <http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method>.
+
+* `rgbahex(color)` -- returns a string containing 4 part hex color.
+
+   This is used to convert a CSS color into the hex format that IE's filter
+   method expects when working with an alpha component.
+
+       ```less
+       .class {
+          @start: rgbahex(rgba(25, 34, 23, .5));
+          @end: rgbahex(rgba(85, 74, 103, .6));
+          // abridged example
+          -ms-filter:
+            e("gradient(start=@{start},end=@{end})");
+       }
+       ```
+
+## PHP Interface
+
+The PHP interface lets you control the compiler from your PHP scripts. There is
+only one file to include to get access to everything:
+
+    ```php
+    <?php
+    include "lessc.inc.php";
+    ```
+
+To compile a file to a string (of CSS code):
+
+    ```php
+    $less = new lessc("myfile.less");
+    $css = $less->parse();
+    ```
+
+To compile a string to a string:
+
+    ```php
+    $less = new lessc(); // a blank lessc
+    $css = $less->parse("body { a { color: red } }");
+    ```
+
+### Output Formatting
+
+Besides the default output formatter, **lessphp** comes with two additional
+ones, and it's easy to make your own.
+
+The first extra formatter is called `compressed`. It compresses the output by
+removing any extra whitespace.
+
+We use the `setFormatter` method set the formatter that should be used. Just
+pass the name of the formatter:
+
+    ```php
+    $less = new lessc("myfile.less");
+
+    $less->setFormatter("compressed");
+
+    $css = $less->parse();
+    ```
+
+The second formatter is called `indent`. It will indent CSS blocks based on how
+they were nested in the LESS code.
+
+#### Custom Formatter
+
+The easiest way to customize is to create your own instance of the formatter
+and alter its public properties before passing it off to **lessphp**. The
+`setFormatter` method can also take an instance of a formatter.
+
+For example, let's use tabs instead of the default two spaces to indent:
+
+    ```php
+    $formatter = new lessc_formatter;
+    $formatter->indentChar = "\t";
+
+    $less = new lessc("myfile.less");
+    $less->setFormatter($formatter);
+    $css = $less->parse();
+    ```
+
+For more information about what can be configured with the formatter consult
+the sourcecode.
+
+### Compiling Automatically
+
+Often, you want to write the compiled CSS to a file, and only recompile when
+the original LESS file has changed. The following function will check if the
+modification date of the LESS file is more recent than the CSS file.  The LESS
+file will be compiled if it is. If the CSS file doesn't exist yet, then it will
+also compile the LESS file.
+
+    ```php
+    lessc::ccompile('myfile.less', 'mystyle.css');
+    ```
+
+`ccompile` is very basic, it only checks if the input file's modification time.
+It is not of any files that are brought in using `@import`.
+
+For this reason we also have `lessc::cexecute`. It functions slightly
+differently, but gives us the ability to check changes to all files used during
+the compile. It takes one argument, either the name of the file we want to
+compile, or an existing *cache object*. Its return value is an updated cache
+object.
+
+If we don't have a cache object, then we call the function with the name of the
+file to get the initial cache object. If we do have a cache object, then we
+call the function with it. In both cases, an updated cache object is returned.
+
+The cache object keeps track of all the files that must be checked in order to
+determine if a rebuild is required.
+
+The cache object is a plain PHP `array`. It stores the last time it compiled in
+`$cache['updated']` and output of the compile in `$cache['compiled']`.
+
+Here we demonstrate creating an new cache object, then using it to see if we
+have a recompiled version available to be written:
+
+
+    ```php
+    $less_file = 'myfile.less';
+    $css_file = 'myfile.css';
+
+    // create a new cache object, and compile
+    $cache = lessc::cexecute('myfile.less');
+    file_put_contents($css_file, $cache['compiled']);
+
+    // the next time we run, write only if it has updated
+    $last_updated = $cache['updated'];
+    $cache = lessc::cexecute($cache);
+    if ($cache['updated'] > $last_updated) {
+        file_put_contents($css_file, $cache['compiled']);
+    }
+
+    ```
+
+In order for the system to fully work, we must save cache object between
+requests. Because it's a plain PHP `array`, it's sufficient to
+[`serialize`](http://php.net/serialize) it and save it the string somewhere
+like a file or in persistent memory.
+
+An example with saving cache object to a file:
+
+    ```php
+    function auto_compile_less($less_fname, $css_fname) {
+      // load the cache
+      $cache_fname = $less_fname.".cache";
+      if (file_exists($cache_fname)) {
+        $cache = unserialize(file_get_contents($cache_fname));
+      } else {
+        $cache = $less_fname;
+      }
+
+      $new_cache = lessc::cexecute($cache);
+      if (!is_array($cache) || $new_cache['updated'] > $cache['updated']) {
+        file_put_contents($cache_fname, serialize($new_cache));
+        file_put_contents($css_fname, $new_cache['compiled']);
+      }
+    }
+
+    auto_compile_less('myfile.less', 'myfile.css');
+    ```
+
+`lessc:cexecute` takes an optional second argument, `$force`. Passing in true
+will cause the input to always be recompiled.
+
+### Error Handling
+
+All of the following methods will throw an `Exception` if the parsing fails:
+
+    ```php
+    $less = new lessc();
+    try {
+        $less->parse("} invalid LESS }}}");
+    } catch (Exception $ex) {
+        echo "lessphp fatal error: ".$ex->getMessage();
+    }
+    ```
+### Setting Variables From PHP
+
+The `parse` function takes a second optional argument. If you want to
+initialize variables from outside the LESS file then you can pass in an
+associative array of names and values. The values will parsed as CSS values:
+
+    ```php
+    $less = new lessc();
+    echo $less->parse(".magic { color: @color;  width: @base - 200; }",
+        array(
+            'color' => 'red';
+            'base' => '960px';
+        ));
+    ```
+
+You can also do this when loading from a file. If the first argument of `parse`
+is an array it will be used an array of variables to set.
+
+    ```php
+    $less = new lessc("myfile.less");
+    echo $less->parse(array('color' => 'blue'));
+    ```
+
+### Custom Functions
+
+**lessphp** has a simple extension interface where you can implement user
+functions that will be exposed in LESS code during the compile. They can be a
+little tricky though because you need to work with the  **lessphp** type system.
+
+An instance of `lessc`, the **lessphp** compiler has two relevant methods:
+`registerFunction` and `unregisterFunction`. `registerFunction` takes two
+arguments, a name and a callable value. `unregisterFunction` just takes the
+name of an existing function to remove.
+
+Here's an example that adds a function called `double` that doubles any numeric
+argument:
+
+    ```php
+    <?php
+    include "lessc.inc.php";
+
+    function lessphp_double($arg) {
+        list($type, $value) = $arg;
+        return array($type, $value*2);
+    }
+
+    $myless = new myless();
+    $myless->registerFunction("double", "lessphp_double");
+
+    // gives us a width of 800px
+    echo $myless->parse("div { width: double(400px); }");
+    ```
+
+The second argument to `registerFunction` is any *callable value* that is
+understood by [`call_user_func`](http://php.net/call_user_func).
+
+If we are using PHP 5.3 or above then we are free to pass a function literal
+like so:
+
+    ```php
+    $myless->registerFunction("double", function($arg) {
+        list($type, $value) = $arg;
+        return array($type, $value*2);
+    });
+    ```
+
+Now let's talk about the `double` function itself.
+
+Although a little verbose, the implementation gives us some insight on the type
+system. All values in **lessphp** are stored in an array where the 0th element
+is a string representing the type, and the other elements make up the
+associated data for that value.
+
+The best way to get an understanding of the system is to register is dummy
+function which does a `vardump` on the argument. Try passing the function
+different values from LESS and see what the results are.
+
+The return value of the registered function must also be a **lessphp** type, but if it is
+a string or numeric value, it will automatically be coerced into an appropriate
+typed value. In our example, we reconstruct the value with our modifications
+while making sure that we preserve the original type.
+
+In addition to the arguments passed from **lessphp**, the instance of
+**lessphp** itself is sent to the registered function as the second argument.
+
+## Command Line Interface
+
+**lessphp** comes with a command line script written in PHP that can be used to
+invoke the compiler from the terminal. On Linux an OSX, all you need to do is
+place `plessc` and `lessc.inc.php` somewhere in your PATH (or you can run it in
+the current directory as well). On windows you'll need a copy of `php.exe` to
+run the file. To compile a file, `input.less` to CSS, run:
+
+    ```bash
+    $ plessc input.less
+    ```
+
+To write to a file, redirect standard out:
+
+    ```bash
+    $ plessc input.less > output.css
+    ```
+
+To compile code directly on the command line:
+
+    ```bash
+    $ plessc -r "@color: red; body { color: @color; }"
+    ```
+
+To watch a file for changes, and compile it as needed, use the `-w` flag:
+
+    ```bash
+    $ plessc -w input-file output-file
+    ```
+
+Errors from watch mode are written to standard out.
+
+
+## License
+
+Copyright (c) 2010 Leaf Corcoran, <http://leafo.net/lessphp>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+*Also under GPL3 if required, see `LICENSE` file*
+
diff --git a/mod/less/vendors/lessphp/lessc.inc.php b/mod/less/vendors/lessphp/lessc.inc.php
new file mode 100644
index 000000000..d710fdf8a
--- /dev/null
+++ b/mod/less/vendors/lessphp/lessc.inc.php
@@ -0,0 +1,2910 @@
+<?php
+
+/**
+ * lessphp v0.3.5
+ * http://leafo.net/lessphp
+ *
+ * LESS css compiler, adapted from http://lesscss.org
+ *
+ * Copyright 2012, Leaf Corcoran <leafot@gmail.com>
+ * Licensed under MIT or GPLv3, see LICENSE
+ */
+
+
+/**
+ * The less compiler and parser.
+ *
+ * Converting LESS to CSS is a two stage process. The incoming file is parsed
+ * by `lessc_parser` into a tree, then compiled to CSS text by `lessc`. The
+ * compile step has an implicit step called reduction, where values are brought
+ * to their lowest form before being turned to text, eg. mathematical equations
+ * are solved, and variables are dereferenced.
+ *
+ * The `lessc` class creates an intstance of the parser, feeds it LESS code, then
+ * compiles the resulting tree to CSS
+ *
+ * The `lessc_parser` class is only concerned with parsing its input.
+ *
+ * The `lessc_formatter` classes are used to format the output of the CSS,
+ * controlling things like whitespace and line-breaks.
+ */
+class lessc {
+	static public $VERSION = "v0.3.5";
+	static protected $TRUE = array("keyword", "true");
+	static protected $FALSE = array("keyword", "false");
+
+	protected $libFunctions = array();
+
+	protected $indentLevel;
+
+	protected $env = null;
+
+	protected $allParsedFiles = array();
+
+	public $vPrefix = '@'; // prefix of abstract properties
+	public $mPrefix = '$'; // prefix of abstract blocks
+	public $parentSelector = '&';
+
+	// types that must be reduced before being compiled
+	static protected $dtypes = array('expression', 'variable',
+		'function', 'negative', 'list', 'lookup');
+
+	public $importDisabled = false;
+	public $importDir = '';
+
+	public $compat = true; // lessjs compatibility mode, does nothing right now
+
+	// set to the parser that generated the current line when compiling
+	// so we know how to create error messages
+	protected $sourceParser = null;
+	protected $sourceLoc = null;
+
+	// attempts to find the path of an import url, returns null for css files
+	function findImport($url) {
+		foreach ((array)$this->importDir as $dir) {
+			$full = $dir.(substr($dir, -1) != '/' ? '/' : '').$url;
+			if ($this->fileExists($file = $full.'.less') || $this->fileExists($file = $full)) {
+				return $file;
+			}
+		}
+
+		return null;
+	}
+
+	function fileExists($name) {
+		return is_file($name);
+	}
+
+	static function compressList($items, $delim) {
+		if (count($items) == 1) return $items[0];
+		else return array('list', $delim, $items);
+	}
+
+	static function preg_quote($what) {
+		return preg_quote($what, '/');
+	}
+
+	// just do a shallow property merge, seems to be what lessjs does
+	function mergeBlock($target, $from) {
+		$target = clone $target;
+		$target->props = array_merge($target->props, $from->props);
+		return $target;
+	}
+
+	// attempt to import $import into $parentBlock
+	// $props is the property array that will given to $parentBlock at the end
+	function mixImport($import, $parentBlock, &$props) {
+		list(, $url, $media) = $import;
+
+		if (empty($media) && substr_compare($url, '.css', -4, 4) !== 0) {
+			if ($this->importDisabled) {
+				$props[] = array('raw', '/* import disabled */');
+				return true;
+			}
+
+			$realPath = $this->findImport($url);
+			if (!is_null($realPath)) {
+				$this->addParsedFile($realPath);
+
+				$parser = new lessc_parser($this, $realPath);
+				$root = $parser->parse(file_get_contents($realPath));
+				$root->isRoot = false;
+				$root->parent = $parentBlock;
+
+				// handle all the imports in the new file
+				$pi = pathinfo($realPath);
+				$this->mixImports($root, $pi['dirname'].'/');
+
+				// inject imported blocks into this block, local will overwrite import
+				$parentBlock->children =
+					array_merge($root->children,$parentBlock->children);
+
+				// splice in the props
+				foreach ($root->props as $prop) {
+					// leave a reference to the file where it came from
+					if (isset($prop[-1]) && !is_array($prop[-1])) {
+						$prop[-1] = array($parser, $prop[-1]);
+					}
+					$props[] = $prop;
+				}
+
+				return true;
+			}
+		}
+
+		// fallback to regular css import
+		$props[] = array('raw', '@import url("'.$url.'")'.($media ? ' '.$media : '').';');
+		return false;
+	}
+
+	// import all imports mentioned in the block
+	function mixImports($block, $importDir = null) {
+		$oldImport = $this->importDir;
+		if (!is_null($importDir)) {
+			$this->importDir = array_merge((array)$importDir, (array)$this->importDir);
+		}
+
+		$props = array();
+		foreach ($block->props as $prop) {
+			if ($prop[0] == 'import') {
+				$this->mixImport($prop, $block, $props);
+			} else {
+				$props[] = $prop;
+			}
+		}
+		$block->props = $props;
+		$this->importDir = $oldImport;
+	}
+
+	/**
+	 * Recursively compiles a block.
+	 * @param $block the block
+	 * @param $parentTags the tags of the block that contained this one
+	 *
+	 * A block is analogous to a CSS block in most cases. A single less document
+	 * is encapsulated in a block when parsed, but it does not have parent tags
+	 * so all of it's children appear on the root level when compiled.
+	 *
+	 * Blocks are made up of props and children.
+	 *
+	 * Props are property instructions, array tuples which describe an action
+	 * to be taken, eg. write a property, set a variable, mixin a block.
+	 *
+	 * The children of a block are just all the blocks that are defined within.
+	 *
+	 * Compiling the block involves pushing a fresh environment on the stack,
+	 * and iterating through the props, compiling each one.
+	 *
+	 * See lessc::compileProp()
+	 *
+	 */
+	function compileBlock($block, $parent_tags = null) {
+		if (!empty($block->no_multiply)) {
+			$special_block = true;
+			$tags = array();
+		} else {
+			$special_block = false;
+
+			// evaluate expression tags
+			$tags = null;
+			if (is_array($block->tags)) {
+				$tags = array();
+				foreach ($block->tags as $tag) {
+					if (is_array($tag)) {
+						list(, $value) = $tag;
+						$tags[] = $this->compileValue($this->reduce($value));
+					} else {
+						$tags[] = $tag;
+					}
+				}
+			}
+
+			$tags = $this->multiplyTags($parent_tags, $tags);
+		}
+
+		$env = $this->pushEnv();
+		$env->nameDepth = array();
+
+		$lines = array();
+		$blocks = array();
+		$this->mixImports($block);
+
+		$idelta = $this->formatter->indentAmount($block);
+		$this->indentLevel += $idelta;
+
+		foreach ($this->sortProps($block->props) as $prop) {
+			$this->compileProp($prop, $block, $tags, $lines, $blocks);
+		}
+		$this->indentLevel -= $idelta;
+
+		$block->scope = $env;
+
+		$this->pop();
+
+		// override tags if it's a special block
+		if (isset($block->media)) {
+			$tags = $this->compileMedia($block);
+		} elseif (isset($block->keyframes)) {
+			$tags = $block->tags[0]." ".
+				$this->compileValue($this->reduce($block->keyframes));
+		} elseif ($special_block) { // font-face and the like
+			$tags = $block->tags[0];
+		}
+
+		return $this->formatter->block($tags, $special_block, $lines,
+			$blocks, $this->indentLevel);
+	}
+
+	function sortProps($props) {
+		$out = array();
+		foreach ($props as $prop) {
+			if ($prop[0] == "assign") $out[] = $prop;
+		}
+
+		foreach ($props as $prop) {
+			if ($prop[0] != "assign") $out[] = $prop;
+		}
+
+		return $out;
+	}
+
+	function expandParentSelectors(&$tag, $replace) {
+		$parts = explode("$&$", $tag);
+		$count = 0;
+		foreach ($parts as &$part) {
+			$part = str_replace($this->parentSelector, $replace, $part, $c);
+			$count += $c;
+		}
+		$tag = implode($this->parentSelector, $parts);
+		return $count;
+	}
+
+	// find the fully qualified tags for a block and its parent's tags
+	function multiplyTags($parents, $current) {
+		if ($parents == null) {
+			if (is_array($current)) {
+				// get rid of parent selectors and escapes in top level tag
+				foreach ($current as &$tag) {
+					$this->expandParentSelectors($tag, "");
+				}
+			}
+			return $current;
+		}
+
+		$tags = array();
+		foreach ($parents as $ptag) {
+			foreach ($current as $tag) {
+				$count = $this->expandParentSelectors($tag, $ptag);
+
+				// don't prepend the parent tag if & was used
+				if ($count > 0) {
+					$tags[] = trim($tag);
+				} else {
+					$tags[] = trim($ptag . ' ' . $tag);
+				}
+			}
+		}
+
+		return $tags;
+	}
+
+	function eq($left, $right) {
+		return $left == $right;
+	}
+
+	function patternMatch($block, $callingArgs) {
+		// match the guards if it has them
+		// any one of the groups must have all its guards pass for a match
+		if (!empty($block->guards)) {
+			$group_passed = false;
+			foreach ($block->guards as $guard_group) {
+				foreach ($guard_group as $guard) {
+					$this->pushEnv();
+					$this->zipSetArgs($block->args, $callingArgs);
+
+					$negate = false;
+					if ($guard[0] == "negate") {
+						$guard = $guard[1];
+						$negate = true;
+					}
+
+					$passed = $this->reduce($guard) == self::$TRUE;
+					if ($negate) $passed = !$passed;
+
+					$this->pop();
+
+					if ($passed) {
+						$group_passed = true;
+					} else {
+						$group_passed = false;
+						break;
+					}
+				}
+
+				if ($group_passed) break;
+			}
+
+			if (!$group_passed) {
+				return false;
+			}
+		}
+
+		$numCalling = count($callingArgs);
+
+		if (empty($block->args)) {
+			return $block->is_vararg || $numCalling == 0;
+		}
+
+		$i = -1; // no args
+		// try to match by arity or by argument literal
+		foreach ($block->args as $i => $arg) {
+			switch ($arg[0]) {
+			case "lit":
+				if (empty($callingArgs[$i]) || !$this->eq($arg[1], $callingArgs[$i])) {
+					return false;
+				}
+				break;
+			case "arg":
+				// no arg and no default value
+				if (!isset($callingArgs[$i]) && !isset($arg[2])) {
+					return false;
+				}
+				break;
+			case "rest":
+				$i--; // rest can be empty
+				break 2;
+			}
+		}
+
+		if ($block->is_vararg) {
+			return true; // not having enough is handled above
+		} else {
+			$numMatched = $i + 1;
+			// greater than becuase default values always match
+			return $numMatched >= $numCalling;
+		}
+	}
+
+	function patternMatchAll($blocks, $callingArgs) {
+		$matches = null;
+		foreach ($blocks as $block) {
+			if ($this->patternMatch($block, $callingArgs)) {
+				$matches[] = $block;
+			}
+		}
+
+		return $matches;
+	}
+
+	// attempt to find blocks matched by path and args
+	function findBlocks($search_in, $path, $args, $seen=array()) {
+		if ($search_in == null) return null;
+		if (isset($seen[$search_in->id])) return null;
+		$seen[$search_in->id] = true;
+
+		$name = $path[0];
+
+		if (isset($search_in->children[$name])) {
+			$blocks = $search_in->children[$name];
+			if (count($path) == 1) {
+				$matches = $this->patternMatchAll($blocks, $args);
+				if (!empty($matches)) {
+					// This will return all blocks that match in the closest
+					// scope that has any matching block, like lessjs
+					return $matches;
+				}
+			} else {
+				return $this->findBlocks($blocks[0],
+					array_slice($path, 1), $args, $seen);
+			}
+		}
+
+		if ($search_in->parent === $search_in) return null;
+		return $this->findBlocks($search_in->parent, $path, $args, $seen);
+	}
+
+	// sets all argument names in $args to either the default value
+	// or the one passed in through $values
+	function zipSetArgs($args, $values) {
+		$i = 0;
+		$assigned_values = array();
+		foreach ($args as $a) {
+			if ($a[0] == "arg") {
+				if ($i < count($values) && !is_null($values[$i])) {
+					$value = $values[$i];
+				} elseif (isset($a[2])) {
+					$value = $a[2];
+				} else $value = null;
+
+				$value = $this->reduce($value);
+				$this->set($a[1], $value);
+				$assigned_values[] = $value;
+			}
+			$i++;
+		}
+
+		// check for a rest
+		$last = end($args);
+		if ($last[0] == "rest") {
+			$rest = array_slice($values, count($args) - 1);
+			$this->set($last[1], $this->reduce(array("list", " ", $rest)));
+		}
+
+		$this->env->arguments = $assigned_values;
+	}
+
+	// compile a prop and update $lines or $blocks appropriately
+	function compileProp($prop, $block, $tags, &$_lines, &$_blocks) {
+		// set error position context
+		if (isset($prop[-1])) {
+			if (is_array($prop[-1])) {
+				list($parser, $count) = $prop[-1];
+				$this->sourceParser = $parser;
+				$this->sourceLoc = $count;
+			} else {
+				$this->sourceParser = $this->parser;
+				$this->sourceLoc = $prop[-1];
+			}
+		} else {
+			$this->sourceLoc = -1;
+		}
+
+		switch ($prop[0]) {
+		case 'assign':
+			list(, $name, $value) = $prop;
+			if ($name[0] == $this->vPrefix) {
+				$this->set($name, $value);
+			} else {
+				$_lines[] = "$name:".
+					$this->compileValue($this->reduce($value)).";";
+			}
+			break;
+		case 'block':
+			list(, $child) = $prop;
+			$_blocks[] = $this->compileBlock($child, $tags);
+			break;
+		case 'mixin':
+			list(, $path, $args, $suffix) = $prop;
+
+			$args = array_map(array($this, "reduce"), (array)$args);
+			$mixins = $this->findBlocks($block, $path, $args);
+			if (is_null($mixins)) {
+				// echo "failed to find block: ".implode(" > ", $path)."\n";
+				break; // throw error here??
+			}
+
+			foreach ($mixins as $mixin) {
+				$old_scope = null;
+				if (isset($mixin->parent->scope)) {
+					$old_scope = $this->env;
+					$this->env = $mixin->parent->scope;
+				}
+
+				$have_args = false;
+				if (isset($mixin->args)) {
+					$have_args = true;
+					$this->pushEnv();
+					$this->zipSetArgs($mixin->args, $args);
+				}
+
+				$old_parent = $mixin->parent;
+				if ($mixin != $block) $mixin->parent = $block;
+
+				foreach ($this->sortProps($mixin->props) as $sub_prop) {
+					if($suffix !== null) {
+						$sub_prop[2] = array(
+							'list', ' ',
+							array($sub_prop[2], array('keyword', $suffix))
+						);
+					}
+
+					$this->compileProp($sub_prop, $mixin, $tags, $_lines, $_blocks);
+				}
+
+				$mixin->parent = $old_parent;
+
+				if ($have_args) $this->pop();
+
+				if ($old_scope) {
+					$this->env = $old_scope;
+				}
+			}
+
+			break;
+		case 'raw':
+			$_lines[] = $prop[1];
+			break;
+		case 'charset':
+			list(, $value) = $prop;
+			$_lines[] = '@charset '.$this->compileValue($this->reduce($value)).';';
+			break;
+		default:
+			$this->throwError("unknown op: {$prop[0]}\n");
+		}
+	}
+
+
+	/**
+	 * Compiles a primitive value into a CSS property value.
+	 *
+	 * Values in lessphp are typed by being wrapped in arrays, their format is
+	 * typically:
+	 *
+	 *     array(type, contents [, additional_contents]*)
+	 *
+	 * The input is expected to be reduced. This function will not work on
+	 * things like expressions and variables.
+	 */
+	function compileValue($value) {
+		switch ($value[0]) {
+		case 'list':
+			// [1] - delimiter
+			// [2] - array of values
+			return implode($value[1], array_map(array($this, 'compileValue'), $value[2]));
+		case 'keyword':
+			// [1] - the keyword
+		case 'number':
+			// [1] - the number
+			return $value[1];
+		case 'escape':
+		case 'string':
+			// [1] - contents of string (includes quotes)
+
+			// search for inline variables to replace
+			$replace = array();
+			if (preg_match_all('/'.self::preg_quote($this->vPrefix).'\{([\w-_][0-9\w-_]*)\}/', $value[1], $m)) {
+				foreach ($m[1] as $name) {
+					if (!isset($replace[$name]))
+						$replace[$name] = $this->compileValue($this->reduce(array('variable', $this->vPrefix . $name)));
+				}
+			}
+
+			foreach ($replace as $var=>$val) {
+				if ($this->quoted($val)) {
+					$val = substr($val, 1, -1);
+				}
+				$value[1] = str_replace($this->vPrefix. '{'.$var.'}', $val, $value[1]);
+			}
+
+			return $value[1];
+		case 'color':
+			// [1] - red component (either number for a %)
+			// [2] - green component
+			// [3] - blue component
+			// [4] - optional alpha component
+			list(, $r, $g, $b) = $value;
+			$r = round($r);
+			$g = round($g);
+			$b = round($b);
+
+			if (count($value) == 5 && $value[4] != 1) { // rgba
+				return 'rgba('.$r.','.$g.','.$b.','.$value[4].')';
+			}
+
+			$h = sprintf("#%02x%02x%02x", $r, $g, $b);
+
+			// Converting hex color to short notation (e.g. #003399 to #039) 
+			if ($h[1] === $h[2] && $h[3] === $h[4] && $h[5] === $h[6]) {
+				$h = '#' . $h[1] . $h[3] . $h[5];
+			}
+
+			return $h;
+
+		case 'function':
+			// [1] - function name
+			// [2] - some array value representing arguments, either ['string', value] or ['list', ',', values[]]
+
+			// see if function evaluates to something else
+			$value = $this->reduce($value);
+			if ($value[0] == 'function') {
+				return $value[1].'('.$this->compileValue($value[2]).')';
+			}
+			else return $this->compileValue($value);
+		default: // assumed to be unit
+			return $value[1].$value[0];
+		}
+	}
+
+	function compileMedia($block) {
+		$mediaParts = array();
+		foreach ($block->media as $part) {
+			if ($part[0] == "raw") {
+				$mediaParts[] = $part[1];
+			} elseif ($part[0] == "assign") {
+				list(, $propName, $propVal) = $part;
+				$mediaParts[] = "$propName: ".
+					$this->compileValue($this->reduce($propVal));
+			}
+		}
+
+		return "@media ".trim(implode($mediaParts));
+	}
+
+	function lib_isnumber($value) {
+		return $this->toBool(is_numeric($value[1]) && $value[0] != "color");
+	}
+
+	function lib_isstring($value) {
+		return $this->toBool($value[0] == "string");
+	}
+
+	function lib_iscolor($value) {
+		return $this->toBool($this->coerceColor($value));
+	}
+
+	function lib_iskeyword($value) {
+		return $this->toBool($value[0] == "keyword");
+	}
+
+	function lib_ispixel($value) {
+		return $this->toBool($value[0] == "px");
+	}
+
+	function lib_ispercentage($value) {
+		return $this->toBool($value[0] == "%");
+	}
+
+	function lib_isem($value) {
+		return $this->toBool($value[0] == "em");
+	}
+
+	function lib_rgbahex($color) {
+		$color = $this->coerceColor($color);
+		if (is_null($color))
+			$this->throwError("color expected for rgbahex");
+
+		return sprintf("#%02x%02x%02x%02x",
+			isset($color[4]) ? $color[4]*255 : 0,
+			$color[1],$color[2], $color[3]);
+	}
+
+	function lib_argb($color){
+            return $this->lib_rgbahex($color);
+        }
+
+	// utility func to unquote a string
+	function lib_e($arg) {
+		switch ($arg[0]) {
+			case "list":
+				$items = $arg[2];
+				if (isset($items[0])) {
+					return $this->lib_e($items[0]);
+				}
+				return "";
+			case "string":
+				$str = $this->compileValue($arg);
+				return substr($str, 1, -1);
+			default:
+				return $this->compileValue($arg);
+		}
+	}
+
+	function lib__sprintf($args) {
+		if ($args[0] != "list") return $args;
+		$values = $args[2];
+		$source = $this->reduce(array_shift($values));
+		if ($source[0] != "string") {
+			return $source;
+		}
+
+		$str = $source[1];
+		$i = 0;
+		if (preg_match_all('/%[dsa]/', $str, $m)) {
+			foreach ($m[0] as $match) {
+				$val = isset($values[$i]) ? $this->reduce($values[$i]) : array('keyword', '');
+				$i++;
+				switch ($match[1]) {
+				case "s":
+					if ($val[0] == "string") {
+						$rep = substr($val[1], 1, -1);
+						break;
+					}
+				default:
+					$rep = $this->compileValue($val);
+				}
+				$str = preg_replace('/'.self::preg_quote($match).'/', $rep, $str, 1);
+			}
+		}
+
+		return array('string', $str);
+	}
+
+	function lib_floor($arg) {
+		return array($arg[0], floor($arg[1]));
+	}
+
+	function lib_ceil($arg) {
+		return array($arg[0], ceil($arg[1]));
+	}
+
+	function lib_round($arg) {
+		return array($arg[0], round($arg[1]));
+	}
+
+	// is a string surrounded in quotes? returns the quoting char if true
+	function quoted($s) {
+		if (preg_match('/^("|\').*?\1$/', $s, $m))
+			return $m[1];
+		else return false;
+	}
+
+	/**
+	 * Helper function to get arguments for color functions.
+	 * Accepts invalid input, non colors interpreted as being black.
+	 */
+	function colorArgs($args) {
+		if ($args[0] != 'list' || count($args[2]) < 2) {
+			return array(array('color', 0, 0, 0));
+		}
+		list($color, $delta) = $args[2];
+		$color = $this->coerceColor($color);
+		if (is_null($color))
+			$color = array('color', 0, 0, 0);
+
+		$delta = floatval($delta[1]);
+
+		return array($color, $delta);
+	}
+
+	function lib_darken($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+		$hsl[3] = $this->clamp($hsl[3] - $delta, 100);
+		return $this->toRGB($hsl);
+	}
+
+	function lib_lighten($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+		$hsl[3] = $this->clamp($hsl[3] + $delta, 100);
+		return $this->toRGB($hsl);
+	}
+
+	function lib_saturate($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+		$hsl[2] = $this->clamp($hsl[2] + $delta, 100);
+		return $this->toRGB($hsl);
+	}
+
+	function lib_desaturate($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+		$hsl[2] = $this->clamp($hsl[2] - $delta, 100);
+		return $this->toRGB($hsl);
+	}
+
+	function lib_spin($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+
+		$hsl[1] = $hsl[1] + $delta % 360;
+		if ($hsl[1] < 0) $hsl[1] += 360;
+
+		return $this->toRGB($hsl);
+	}
+
+	function lib_fadeout($args) {
+		list($color, $delta) = $this->colorArgs($args);
+		$color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) - $delta/100);
+		return $color;
+	}
+
+	function lib_fadein($args) {
+		list($color, $delta) = $this->colorArgs($args);
+		$color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) + $delta/100);
+		return $color;
+	}
+
+	function lib_hue($color) {
+		if ($color[0] != 'color') return 0;
+		$hsl = $this->toHSL($color);
+		return round($hsl[1]);
+	}
+
+	function lib_saturation($color) {
+		if ($color[0] != 'color') return 0;
+		$hsl = $this->toHSL($color);
+		return round($hsl[2]);
+	}
+
+	function lib_lightness($color) {
+		if ($color[0] != 'color') return 0;
+		$hsl = $this->toHSL($color);
+		return round($hsl[3]);
+	}
+
+	// get the alpha of a color
+	// defaults to 1 for non-colors or colors without an alpha
+	function lib_alpha($color) {
+		if ($color[0] != 'color') return 1;
+		return isset($color[4]) ? $color[4] : 1;
+	}
+
+	// set the alpha of the color
+	function lib_fade($args) {
+		list($color, $alpha) = $this->colorArgs($args);
+		$color[4] = $this->clamp($alpha / 100.0);
+		return $color;
+	}
+
+	function lib_percentage($number) {
+		return array('%', $number[1]*100);
+	}
+
+	// mixes two colors by weight
+	// mix(@color1, @color2, @weight);
+	// http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method
+	function lib_mix($args) {
+		if ($args[0] != "list" || count($args[2]) < 3)
+			$this->throwError("mix expects (color1, color2, weight)");
+
+		list($first, $second, $weight) = $args[2];
+		$first = $this->assertColor($first);
+		$second = $this->assertColor($second);
+
+		$first_a = $this->lib_alpha($first);
+		$second_a = $this->lib_alpha($second);
+		$weight = $weight[1] / 100.0;
+
+		$w = $weight * 2 - 1;
+		$a = $first_a - $second_a;
+
+		$w1 = (($w * $a == -1 ? $w : ($w + $a)/(1 + $w * $a)) + 1) / 2.0;
+		$w2 = 1.0 - $w1;
+
+		$new = array('color',
+			$w1 * $first[1] + $w2 * $second[1],
+			$w1 * $first[2] + $w2 * $second[2],
+			$w1 * $first[3] + $w2 * $second[3],
+		);
+
+		if ($first_a != 1.0 || $second_a != 1.0) {
+			$new[] = $first_a * $weight + $second_a * ($weight - 1);
+		}
+
+		return $this->fixColor($new);
+	}
+
+	function assertColor($value, $error = "expected color value") {
+		$color = $this->coerceColor($value);
+		if (is_null($color)) $this->throwError($error);
+		return $color;
+	}
+
+	function toHSL($color) {
+		if ($color[0] == 'hsl') return $color;
+
+		$r = $color[1] / 255;
+		$g = $color[2] / 255;
+		$b = $color[3] / 255;
+
+		$min = min($r, $g, $b);
+		$max = max($r, $g, $b);
+
+		$L = ($min + $max) / 2;
+		if ($min == $max) {
+			$S = $H = 0;
+		} else {
+			if ($L < 0.5)
+				$S = ($max - $min)/($max + $min);
+			else
+				$S = ($max - $min)/(2.0 - $max - $min);
+
+			if ($r == $max) $H = ($g - $b)/($max - $min);
+			elseif ($g == $max) $H = 2.0 + ($b - $r)/($max - $min);
+			elseif ($b == $max) $H = 4.0 + ($r - $g)/($max - $min);
+
+		}
+
+		$out = array('hsl',
+			($H < 0 ? $H + 6 : $H)*60,
+			$S*100,
+			$L*100,
+		);
+
+		if (count($color) > 4) $out[] = $color[4]; // copy alpha
+		return $out;
+	}
+
+	function toRGB_helper($comp, $temp1, $temp2) {
+		if ($comp < 0) $comp += 1.0;
+		elseif ($comp > 1) $comp -= 1.0;
+
+		if (6 * $comp < 1) return $temp1 + ($temp2 - $temp1) * 6 * $comp;
+		if (2 * $comp < 1) return $temp2;
+		if (3 * $comp < 2) return $temp1 + ($temp2 - $temp1)*((2/3) - $comp) * 6;
+
+		return $temp1;
+	}
+
+	/**
+	 * Converts a hsl array into a color value in rgb.
+	 * Expects H to be in range of 0 to 360, S and L in 0 to 100
+	 */
+	function toRGB($color) {
+		if ($color == 'color') return $color;
+
+		$H = $color[1] / 360;
+		$S = $color[2] / 100;
+		$L = $color[3] / 100;
+
+		if ($S == 0) {
+			$r = $g = $b = $L;
+		} else {
+			$temp2 = $L < 0.5 ?
+				$L*(1.0 + $S) :
+				$L + $S - $L * $S;
+
+			$temp1 = 2.0 * $L - $temp2;
+
+			$r = $this->toRGB_helper($H + 1/3, $temp1, $temp2);
+			$g = $this->toRGB_helper($H, $temp1, $temp2);
+			$b = $this->toRGB_helper($H - 1/3, $temp1, $temp2);
+		}
+
+		// $out = array('color', round($r*255), round($g*255), round($b*255));
+		$out = array('color', $r*255, $g*255, $b*255);
+		if (count($color) > 4) $out[] = $color[4]; // copy alpha
+		return $out;
+	}
+
+	function clamp($v, $max = 1, $min = 0) {
+		return min($max, max($min, $v));
+	}
+
+	/**
+	 * Convert the rgb, rgba, hsl color literals of function type
+	 * as returned by the parser into values of color type.
+	 */
+	function funcToColor($func) {
+		$fname = $func[1];
+		if ($func[2][0] != 'list') return false; // need a list of arguments
+		$rawComponents = $func[2][2];
+
+		if ($fname == 'hsl' || $fname == 'hsla') {
+			$hsl = array('hsl');
+			$i = 0;
+			foreach ($rawComponents as $c) {
+				$val = $this->reduce($c);
+				$val = isset($val[1]) ? floatval($val[1]) : 0;
+
+				if ($i == 0) $clamp = 360;
+				elseif ($i < 4) $clamp = 100;
+				else $clamp = 1;
+
+				$hsl[] = $this->clamp($val, $clamp);
+				$i++;
+			}
+
+			while (count($hsl) < 4) $hsl[] = 0;
+			return $this->toRGB($hsl);
+
+		} elseif ($fname == 'rgb' || $fname == 'rgba') {
+			$components = array();
+			$i = 1;
+			foreach	($rawComponents as $c) {
+				$c = $this->reduce($c);
+				if ($i < 4) {
+					if ($c[0] == '%') $components[] = 255 * ($c[1] / 100);
+					else $components[] = floatval($c[1]);
+				} elseif ($i == 4) {
+					if ($c[0] == '%') $components[] = 1.0 * ($c[1] / 100);
+					else $components[] = floatval($c[1]);
+				} else break;
+
+				$i++;
+			}
+			while (count($components) < 3) $components[] = 0;
+			array_unshift($components, 'color');
+			return $this->fixColor($components);
+		}
+
+		return false;
+	}
+
+	function toName($val) {
+		switch($val[0]) {
+		case "string":
+			return substr($val[1], 1, -1);
+		default:
+			return $val[1];
+		}
+	}
+
+	// reduce a delayed type to its final value
+	// dereference variables and solve equations
+	function reduce($var) {
+		// this is done here for infinite loop checking
+		if ($var[0] == "variable") {
+			$key = is_array($var[1]) ?
+				$this->vPrefix.$this->toName($this->reduce($var[1])) : $var[1];
+
+			$seen =& $this->env->seenNames;
+
+			if (!empty($seen[$key])) {
+				$this->throwError("infinite loop detected: $key");
+			}
+
+			$seen[$key] = true;
+
+			$out = $this->reduce($this->get($key));
+
+			$seen[$key] = false;
+
+			return $out;
+		}
+
+		while (in_array($var[0], self::$dtypes)) {
+			if ($var[0] == 'list') {
+				foreach ($var[2] as &$value) $value = $this->reduce($value);
+				break;
+			} elseif ($var[0] == 'expression') {
+				$var = $this->evaluate($var[1], $var[2], $var[3]);
+			} elseif ($var[0] == 'lookup') {
+				// do accessor here....
+				$var = array('number', 0);
+			} elseif ($var[0] == 'function') {
+				$color = $this->funcToColor($var);
+				if ($color) $var = $color;
+				else {
+					list($_, $name, $args) = $var;
+					if ($name == "%") $name = "_sprintf";
+					$f = isset($this->libFunctions[$name]) ?
+						$this->libFunctions[$name] : array($this, 'lib_'.$name);
+
+					if (is_callable($f)) {
+						if ($args[0] == 'list')
+							$args = self::compressList($args[2], $args[1]);
+
+						$var = call_user_func($f, $this->reduce($args), $this);
+
+						// convert to a typed value if the result is a php primitive
+						if (is_numeric($var)) $var = array('number', $var);
+						elseif (!is_array($var)) $var = array('keyword', $var);
+					} else {
+						// plain function, reduce args
+						$var[2] = $this->reduce($var[2]);
+					}
+				}
+				break; // done reducing after a function
+			} elseif ($var[0] == 'negative') {
+				$value = $this->reduce($var[1]);
+				if (is_numeric($value[1])) {
+					$value[1] = -1*$value[1];
+				}
+				$var = $value;
+			}
+		}
+
+		return $var;
+	}
+
+	function coerceColor($value) {
+		switch($value[0]) {
+			case 'color': return $value;
+			case 'keyword':
+				$name = $value[1];
+				if (isset(self::$cssColors[$name])) {
+					list($r, $g, $b) = explode(',', self::$cssColors[$name]);
+					return array('color', $r, $g, $b);
+				}
+				return null;
+		}
+	}
+
+	function toBool($a) {
+		if ($a) return self::$TRUE;
+		else return self::$FALSE;
+	}
+
+	// evaluate an expression
+	function evaluate($op, $left, $right) {
+		$left = $this->reduce($left);
+		$right = $this->reduce($right);
+
+		if ($left_color = $this->coerceColor($left)) {
+			$left = $left_color;
+		}
+
+		if ($right_color = $this->coerceColor($right)) {
+			$right = $right_color;
+		}
+
+		if ($op == "and") {
+			return $this->toBool($left == self::$TRUE && $right == self::$TRUE);
+		}
+
+		if ($op == "=") {
+			return $this->toBool($this->eq($left, $right) );
+		}
+
+		if ($left[0] == 'color' && $right[0] == 'color') {
+			$out = $this->op_color_color($op, $left, $right);
+			return $out;
+		}
+
+		if ($left[0] == 'color') {
+			return $this->op_color_number($op, $left, $right);
+		}
+
+		if ($right[0] == 'color') {
+			return $this->op_number_color($op, $left, $right);
+		}
+
+		// concatenate strings
+		if ($op == '+' && $left[0] == 'string') {
+			$append = $this->compileValue($right);
+			if ($this->quoted($append)) $append = substr($append, 1, -1);
+
+			$lhs = $this->compileValue($left);
+			if ($q = $this->quoted($lhs)) $lhs = substr($lhs, 1, -1);
+			if (!$q) $q = '';
+
+			return array('string', $q.$lhs.$append.$q);
+		}
+
+		if ($left[0] == 'keyword' || $right[0] == 'keyword' ||
+			$left[0] == 'string' || $right[0] == 'string')
+		{
+			// look for negative op
+			if ($op == '-') $right[1] = '-'.$right[1];
+			return array('keyword', $this->compileValue($left) .' '. $this->compileValue($right));
+		}
+
+		// default to number operation
+		return $this->op_number_number($op, $left, $right);
+	}
+
+	// make sure a color's components don't go out of bounds
+	function fixColor($c) {
+		foreach (range(1, 3) as $i) {
+			if ($c[$i] < 0) $c[$i] = 0;
+			if ($c[$i] > 255) $c[$i] = 255;
+		}
+
+		return $c;
+	}
+
+	function op_number_color($op, $lft, $rgt) {
+		if ($op == '+' || $op = '*') {
+			return $this->op_color_number($op, $rgt, $lft);
+		}
+	}
+
+	function op_color_number($op, $lft, $rgt) {
+		if ($rgt[0] == '%') $rgt[1] /= 100;
+
+		return $this->op_color_color($op, $lft,
+			array_fill(1, count($lft) - 1, $rgt[1]));
+	}
+
+	function op_color_color($op, $left, $right) {
+		$out = array('color');
+		$max = count($left) > count($right) ? count($left) : count($right);
+		foreach (range(1, $max - 1) as $i) {
+			$lval = isset($left[$i]) ? $left[$i] : 0;
+			$rval = isset($right[$i]) ? $right[$i] : 0;
+			switch ($op) {
+			case '+':
+				$out[] = $lval + $rval;
+				break;
+			case '-':
+				$out[] = $lval - $rval;
+				break;
+			case '*':
+				$out[] = $lval * $rval;
+				break;
+			case '%':
+				$out[] = $lval % $rval;
+				break;
+			case '/':
+				if ($rval == 0) $this->throwError("evaluate error: can't divide by zero");
+				$out[] = $lval / $rval;
+				break;
+			default:
+				$this->throwError('evaluate error: color op number failed on op '.$op);
+			}
+		}
+		return $this->fixColor($out);
+	}
+
+	// operator on two numbers
+	function op_number_number($op, $left, $right) {
+		$type = is_null($left) ? "number" : $left[0];
+		if ($type == "number") $type = $right[0];
+
+		$value = 0;
+		switch ($op) {
+		case '+':
+			$value = $left[1] + $right[1];
+			break;
+		case '*':
+			$value = $left[1] * $right[1];
+			break;
+		case '-':
+			$value = $left[1] - $right[1];
+			break;
+		case '%':
+			$value = $left[1] % $right[1];
+			break;
+		case '/':
+			if ($right[1] == 0) $this->throwError('parse error: divide by zero');
+			$value = $left[1] / $right[1];
+			break;
+		case '<':
+			return $this->toBool($left[1] < $right[1]);
+		case '>':
+			return $this->toBool($left[1] > $right[1]);
+		case '>=':
+			return $this->toBool($left[1] >= $right[1]);
+		case '=<':
+			return $this->toBool($left[1] <= $right[1]);
+		default:
+			$this->throwError('parse error: unknown number operator: '.$op);
+		}
+
+		return array($type, $value);
+	}
+
+
+	/* environment functions */
+
+	// used for compiliation variable state
+	function pushEnv() {
+		$e = new stdclass;
+		$e->parent = $this->env;
+
+		$this->store = array();
+
+		$this->env = $e;
+		return $e;
+	}
+
+	// pop something off the stack
+	function pop() {
+		$old = $this->env;
+		$this->env = $this->env->parent;
+		return $old;
+	}
+
+	// set something in the current env
+	function set($name, $value) {
+		$this->env->store[$name] = $value;
+	}
+
+
+	// get the highest occurrence entry for a name
+	function get($name) {
+		$current = $this->env;
+
+		$is_arguments = $name == $this->vPrefix . 'arguments';
+		while ($current) {
+			if ($is_arguments && isset($current->arguments)) {
+				return array('list', ' ', $current->arguments);
+			}
+
+			if (isset($current->store[$name]))
+				return $current->store[$name];
+			else
+				$current = $current->parent;
+		}
+
+		return null;
+	}
+
+	// create a child parser (for compiling an import)
+	protected function createChild($fname) {
+		$less = new lessc($fname);
+		$less->importDir = array_merge((array)$less->importDir, (array)$this->importDir);
+		$less->formatter = $this->formatter;
+		$less->compat = $this->compat;
+		return $less;
+	}
+
+	// inject array of unparsed strings into environment as variables
+	protected function injectVariables($args) {
+		$this->pushEnv();
+		$parser = new lessc_parser($this, __METHOD__);
+		foreach ($args as $name => $str_value) {
+			if ($name{0} != '@') $name = '@'.$name;
+			$parser->count = 0;
+			$parser->buffer = (string)$str_value;
+			if (!$parser->propertyValue($value)) {
+				throw new Exception("failed to parse passed in variable $name: $str_value");
+			}
+
+			$this->set($name, $value);
+		}
+	}
+
+	// parse and compile buffer
+	function parse($str = null, $initialVariables = null) {
+		if (is_array($str)) {
+			$initialVariables = $str;
+			$str = null;
+		}
+
+		$locale = setlocale(LC_NUMERIC, 0);
+		setlocale(LC_NUMERIC, "C");
+
+		$name = null;
+		if (is_null($str)) {
+			if (empty($this->fileName))
+				throw new exception("nothing to parse");
+
+			$name = $this->fileName;
+			$str = file_get_contents($this->fileName);
+		}
+
+		$this->parser = new lessc_parser($this, $name);
+		$root = $this->parser->parse($str);
+
+		$this->formatter = $this->newFormatter();
+
+		if ($initialVariables) $this->injectVariables($initialVariables);
+		$this->indentLevel = -1;
+		$out = $this->compileBlock($root);
+		setlocale(LC_NUMERIC, $locale);
+		return $out;
+	}
+
+	function setFormatter($name) {
+		$this->formatterName = $name;
+	}
+
+	function newFormatter() {
+		$className = "lessc_formatter";
+		if (!empty($this->formatterName)) {
+			if (!is_string($this->formatterName))
+				return $this->formatterName;
+			$className = "lessc_formatter_$this->formatterName";
+		}
+
+		return new $className;
+	}
+
+	/**
+	 * Uses the current value of $this->count to show line and line number
+	 */
+	function throwError($msg = null) {
+		if ($this->sourceLoc >= 0) {
+			$this->sourceParser->throwError($msg, $this->sourceLoc);
+		}
+		throw new exception($msg);
+	}
+
+	/**
+	 * Initialize any static state, can initialize parser for a file
+	 * $opts isn't used yet
+	 */
+	function __construct($fname = null, $opts = null) {
+		if ($fname) {
+			if (!is_file($fname)) {
+				throw new Exception('load error: failed to find '.$fname);
+			}
+			$pi = pathinfo($fname);
+
+			$this->fileName = $fname;
+			$this->importDir = $pi['dirname'].'/';
+			$this->addParsedFile($fname);
+		}
+	}
+
+	public function registerFunction($name, $func) {
+		$this->libFunctions[$name] = $func;
+	}
+
+	public function unregisterFunction($name) {
+		unset($this->libFunctions[$name]);
+	}
+
+	public function allParsedFiles() { return $this->allParsedFiles; }
+	protected function addParsedFile($file) {
+		$this->allParsedFiles[realpath($file)] = filemtime($file);
+	}
+
+
+	// compile file $in to file $out if $in is newer than $out
+	// returns true when it compiles, false otherwise
+	public static function ccompile($in, $out) {
+		if (!is_file($out) || filemtime($in) > filemtime($out)) {
+			$less = new lessc($in);
+			file_put_contents($out, $less->parse());
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Execute lessphp on a .less file or a lessphp cache structure
+	 *
+	 * The lessphp cache structure contains information about a specific
+	 * less file having been parsed. It can be used as a hint for future
+	 * calls to determine whether or not a rebuild is required.
+	 *
+	 * The cache structure contains two important keys that may be used
+	 * externally:
+	 *
+	 * compiled: The final compiled CSS
+	 * updated: The time (in seconds) the CSS was last compiled
+	 *
+	 * The cache structure is a plain-ol' PHP associative array and can
+	 * be serialized and unserialized without a hitch.
+	 *
+	 * @param mixed $in Input
+	 * @param bool $force Force rebuild?
+	 * @return array lessphp cache structure
+	 */
+	public static function cexecute($in, $force = false) {
+
+		// assume no root
+		$root = null;
+
+		if (is_string($in)) {
+			$root = $in;
+		} elseif (is_array($in) and isset($in['root'])) {
+			if ($force or ! isset($in['files'])) {
+				// If we are forcing a recompile or if for some reason the
+				// structure does not contain any file information we should
+				// specify the root to trigger a rebuild.
+				$root = $in['root'];
+			} elseif (isset($in['files']) and is_array($in['files'])) {
+				foreach ($in['files'] as $fname => $ftime ) {
+					if (!file_exists($fname) or filemtime($fname) > $ftime) {
+						// One of the files we knew about previously has changed
+						// so we should look at our incoming root again.
+						$root = $in['root'];
+						break;
+					}
+				}
+			}
+		} else {
+			// TODO: Throw an exception? We got neither a string nor something
+			// that looks like a compatible lessphp cache structure.
+			return null;
+		}
+
+		if ($root !== null) {
+			// If we have a root value which means we should rebuild.
+			$less = new lessc($root);
+			$out = array();
+			$out['root'] = $root;
+			$out['compiled'] = $less->parse();
+			$out['files'] = $less->allParsedFiles();
+			$out['updated'] = time();
+			return $out;
+		} else {
+			// No changes, pass back the structure
+			// we were given initially.
+			return $in;
+		}
+
+	}
+
+	static protected $cssColors = array(
+		'aliceblue' => '240,248,255',
+		'antiquewhite' => '250,235,215',
+		'aqua' => '0,255,255',
+		'aquamarine' => '127,255,212',
+		'azure' => '240,255,255',
+		'beige' => '245,245,220',
+		'bisque' => '255,228,196',
+		'black' => '0,0,0',
+		'blanchedalmond' => '255,235,205',
+		'blue' => '0,0,255',
+		'blueviolet' => '138,43,226',
+		'brown' => '165,42,42',
+		'burlywood' => '222,184,135',
+		'cadetblue' => '95,158,160',
+		'chartreuse' => '127,255,0',
+		'chocolate' => '210,105,30',
+		'coral' => '255,127,80',
+		'cornflowerblue' => '100,149,237',
+		'cornsilk' => '255,248,220',
+		'crimson' => '220,20,60',
+		'cyan' => '0,255,255',
+		'darkblue' => '0,0,139',
+		'darkcyan' => '0,139,139',
+		'darkgoldenrod' => '184,134,11',
+		'darkgray' => '169,169,169',
+		'darkgreen' => '0,100,0',
+		'darkgrey' => '169,169,169',
+		'darkkhaki' => '189,183,107',
+		'darkmagenta' => '139,0,139',
+		'darkolivegreen' => '85,107,47',
+		'darkorange' => '255,140,0',
+		'darkorchid' => '153,50,204',
+		'darkred' => '139,0,0',
+		'darksalmon' => '233,150,122',
+		'darkseagreen' => '143,188,143',
+		'darkslateblue' => '72,61,139',
+		'darkslategray' => '47,79,79',
+		'darkslategrey' => '47,79,79',
+		'darkturquoise' => '0,206,209',
+		'darkviolet' => '148,0,211',
+		'deeppink' => '255,20,147',
+		'deepskyblue' => '0,191,255',
+		'dimgray' => '105,105,105',
+		'dimgrey' => '105,105,105',
+		'dodgerblue' => '30,144,255',
+		'firebrick' => '178,34,34',
+		'floralwhite' => '255,250,240',
+		'forestgreen' => '34,139,34',
+		'fuchsia' => '255,0,255',
+		'gainsboro' => '220,220,220',
+		'ghostwhite' => '248,248,255',
+		'gold' => '255,215,0',
+		'goldenrod' => '218,165,32',
+		'gray' => '128,128,128',
+		'green' => '0,128,0',
+		'greenyellow' => '173,255,47',
+		'grey' => '128,128,128',
+		'honeydew' => '240,255,240',
+		'hotpink' => '255,105,180',
+		'indianred' => '205,92,92',
+		'indigo' => '75,0,130',
+		'ivory' => '255,255,240',
+		'khaki' => '240,230,140',
+		'lavender' => '230,230,250',
+		'lavenderblush' => '255,240,245',
+		'lawngreen' => '124,252,0',
+		'lemonchiffon' => '255,250,205',
+		'lightblue' => '173,216,230',
+		'lightcoral' => '240,128,128',
+		'lightcyan' => '224,255,255',
+		'lightgoldenrodyellow' => '250,250,210',
+		'lightgray' => '211,211,211',
+		'lightgreen' => '144,238,144',
+		'lightgrey' => '211,211,211',
+		'lightpink' => '255,182,193',
+		'lightsalmon' => '255,160,122',
+		'lightseagreen' => '32,178,170',
+		'lightskyblue' => '135,206,250',
+		'lightslategray' => '119,136,153',
+		'lightslategrey' => '119,136,153',
+		'lightsteelblue' => '176,196,222',
+		'lightyellow' => '255,255,224',
+		'lime' => '0,255,0',
+		'limegreen' => '50,205,50',
+		'linen' => '250,240,230',
+		'magenta' => '255,0,255',
+		'maroon' => '128,0,0',
+		'mediumaquamarine' => '102,205,170',
+		'mediumblue' => '0,0,205',
+		'mediumorchid' => '186,85,211',
+		'mediumpurple' => '147,112,219',
+		'mediumseagreen' => '60,179,113',
+		'mediumslateblue' => '123,104,238',
+		'mediumspringgreen' => '0,250,154',
+		'mediumturquoise' => '72,209,204',
+		'mediumvioletred' => '199,21,133',
+		'midnightblue' => '25,25,112',
+		'mintcream' => '245,255,250',
+		'mistyrose' => '255,228,225',
+		'moccasin' => '255,228,181',
+		'navajowhite' => '255,222,173',
+		'navy' => '0,0,128',
+		'oldlace' => '253,245,230',
+		'olive' => '128,128,0',
+		'olivedrab' => '107,142,35',
+		'orange' => '255,165,0',
+		'orangered' => '255,69,0',
+		'orchid' => '218,112,214',
+		'palegoldenrod' => '238,232,170',
+		'palegreen' => '152,251,152',
+		'paleturquoise' => '175,238,238',
+		'palevioletred' => '219,112,147',
+		'papayawhip' => '255,239,213',
+		'peachpuff' => '255,218,185',
+		'peru' => '205,133,63',
+		'pink' => '255,192,203',
+		'plum' => '221,160,221',
+		'powderblue' => '176,224,230',
+		'purple' => '128,0,128',
+		'red' => '255,0,0',
+		'rosybrown' => '188,143,143',
+		'royalblue' => '65,105,225',
+		'saddlebrown' => '139,69,19',
+		'salmon' => '250,128,114',
+		'sandybrown' => '244,164,96',
+		'seagreen' => '46,139,87',
+		'seashell' => '255,245,238',
+		'sienna' => '160,82,45',
+		'silver' => '192,192,192',
+		'skyblue' => '135,206,235',
+		'slateblue' => '106,90,205',
+		'slategray' => '112,128,144',
+		'slategrey' => '112,128,144',
+		'snow' => '255,250,250',
+		'springgreen' => '0,255,127',
+		'steelblue' => '70,130,180',
+		'tan' => '210,180,140',
+		'teal' => '0,128,128',
+		'thistle' => '216,191,216',
+		'tomato' => '255,99,71',
+		'turquoise' => '64,224,208',
+		'violet' => '238,130,238',
+		'wheat' => '245,222,179',
+		'white' => '255,255,255',
+		'whitesmoke' => '245,245,245',
+		'yellow' => '255,255,0',
+		'yellowgreen' => '154,205,50'
+	);
+}
+
+// responsible for taking a string of LESS code and converting it into a
+// syntax tree
+class lessc_parser {
+	static protected $nextBlockId = 0; // used to uniquely identify blocks
+
+	static protected $precedence = array(
+		'=<' => 0,
+		'>=' => 0,
+		'=' => 0,
+		'<' => 0,
+		'>' => 0,
+
+		'+' => 1,
+		'-' => 1,
+		'*' => 2,
+		'/' => 2,
+		'%' => 2,
+	);
+
+	// regex string to match any of the operators
+	static protected $operatorString;
+
+	// these properties will supress division unless it's inside parenthases
+	static protected $supressDivisionProps =
+		array('/border-radius$/i', '/^font$/i');
+
+	/**
+	 * @link http://www.w3.org/TR/css3-values/
+	 */
+	static protected $units = array(
+		'em', 'ex', 'px', 'gd', 'rem', 'vw', 'vh', 'vm', 'ch', // Relative length units
+		'in', 'cm', 'mm', 'pt', 'pc', // Absolute length units
+		'%', // Percentages
+		'deg', 'grad', 'rad', 'turn', // Angles
+		'ms', 's', // Times
+		'Hz', 'kHz', //Frequencies
+	);
+
+	/**
+	 * if we are in parens we can be more liberal with whitespace around
+	 * operators because it must evaluate to a single value and thus is less
+	 * ambiguous.
+	 *
+	 * Consider:
+	 *     property1: 10 -5; // is two numbers, 10 and -5
+	 *     property2: (10 -5); // should evaluate to 5
+	 */
+	protected $inParens = false;
+
+	function __construct($lessc, $sourceName = null) {
+		// reference to less needed for vPrefix, mPrefix, and parentSelector
+		$this->lessc = $lessc;
+
+		$this->sourceName = $sourceName; // name used for error messages
+
+		if (!self::$operatorString) {
+			self::$operatorString =
+				'('.implode('|', array_map(array('lessc', 'preg_quote'),
+					array_keys(self::$precedence))).')';
+		}
+	}
+
+	function parse($buffer) {
+		$this->count = 0;
+		$this->line = 1;
+
+		$this->env = null; // block stack
+		$this->buffer = $this->removeComments($buffer);
+		$this->pushBlock(null); // root
+
+		// trim whitespace on head
+		if (preg_match('/^\s+/', $this->buffer, $m)) {
+			$this->line += substr_count($m[0], "\n");
+			$this->buffer = ltrim($this->buffer);
+		}
+
+		// parse the entire file
+		$lastCount = $this->count;
+		while (false !== $this->parseChunk());
+
+		if ($this->count != strlen($this->buffer))
+			$this->throwError();
+
+		// TODO report where the block was opened
+		if (!is_null($this->env->parent))
+			throw new exception('parse error: unclosed block');
+
+		$this->env->isRoot = true;
+		return $this->env;
+	}
+
+	/**
+	 * Parse a single chunk off the head of the buffer and append it to the
+	 * current parse environment.
+	 * Returns false when the buffer is empty, or when there is an error.
+	 *
+	 * This function is called repeatedly until the entire document is
+	 * parsed.
+	 *
+	 * This parser is most similar to a recursive descent parser. Single
+	 * functions represent discrete grammatical rules for the language, and
+	 * they are able to capture the text that represents those rules.
+	 *
+	 * Consider the function lessc::keyword(). (all parse functions are
+	 * structured the same)
+	 *
+	 * The function takes a single reference argument. When calling the
+	 * function it will attempt to match a keyword on the head of the buffer.
+	 * If it is successful, it will place the keyword in the referenced
+	 * argument, advance the position in the buffer, and return true. If it
+	 * fails then it won't advance the buffer and it will return false.
+	 *
+	 * All of these parse functions are powered by lessc::match(), which behaves
+	 * the same way, but takes a literal regular expression. Sometimes it is
+	 * more convenient to use match instead of creating a new function.
+	 *
+	 * Because of the format of the functions, to parse an entire string of
+	 * grammatical rules, you can chain them together using &&.
+	 *
+	 * But, if some of the rules in the chain succeed before one fails, then
+	 * the buffer position will be left at an invalid state. In order to
+	 * avoid this, lessc::seek() is used to remember and set buffer positions.
+	 *
+	 * Before parsing a chain, use $s = $this->seek() to remember the current
+	 * position into $s. Then if a chain fails, use $this->seek($s) to
+	 * go back where we started.
+	 */
+	protected function parseChunk() {
+		if (empty($this->buffer)) return false;
+		$s = $this->seek();
+
+		// setting a property
+		if ($this->keyword($key) && $this->assign() &&
+			$this->propertyValue($value, $key) && $this->end())
+		{
+			$this->append(array('assign', $key, $value), $s);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		// look for special css blocks
+		if ($this->env->parent == null && $this->literal('@', false)) {
+			$this->count--;
+
+			// a font-face block
+			if ($this->literal('@font-face') && $this->literal('{')) {
+				$b = $this->pushSpecialBlock('@font-face');
+				return true;
+			} else {
+				$this->seek($s);
+			}
+
+			// charset
+			if ($this->literal('@charset') && $this->propertyValue($value) &&
+				$this->end())
+			{
+				$this->append(array('charset', $value), $s);
+				return true;
+			} else {
+				$this->seek($s);
+			}
+
+
+			// media
+			if ($this->literal('@media') && $this->mediaTypes($types) &&
+				$this->literal('{'))
+			{
+				$b = $this->pushSpecialBlock('@media');
+				$b->media = $types;
+				return true;
+			} else {
+				$this->seek($s);
+			}
+
+			// css animations
+			if ($this->match('(@(-[a-z]+-)?keyframes)', $m) &&
+				$this->propertyValue($value) && $this->literal('{'))
+			{
+				$b = $this->pushSpecialBlock(trim($m[0]));
+				$b->keyframes = $value;
+				return true;
+			} else {
+				$this->seek($s);
+			}
+
+			if ($this->literal("@page") &&
+				($this->match('(:(left|right))', $m) || true) &&
+				$this->literal("{"))
+			{
+				$name = "@page";
+				if ($m) $name = $name . " " . $m[1];
+				$this->pushSpecialBlock($name);
+				return true;
+			} else {
+				$this->seek($s);
+			}
+		}
+
+		if (isset($this->env->keyframes)) {
+			if ($this->keyframeTags($ktags) && $this->literal('{')) {
+				$this->pushSpecialBlock($ktags);
+				return true;
+			} else {
+				$this->seek($s);
+			}
+		}
+
+		// setting a variable
+		if ($this->variable($var) && $this->assign() &&
+			$this->propertyValue($value) && $this->end())
+		{
+			$this->append(array('assign', $var, $value), $s);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		if ($this->import($url, $media)) {
+			$this->append(array('import', $url, $media), $s);
+			return true;
+
+			// don't check .css files
+			if (empty($media) && substr_compare($url, '.css', -4, 4) !== 0) {
+				if ($this->importDisabled) {
+					$this->append(array('raw', '/* import disabled */'));
+				} else {
+					$path = $this->findImport($url);
+					if (!is_null($path)) {
+						$this->append(array('import', $path), $s);
+						return true;
+					}
+				}
+			}
+
+			$this->append(array('raw', '@import url("'.$url.'")'.
+				($media ? ' '.$media : '').';'), $s);
+			return true;
+		}
+
+		// opening parametric mixin
+		if ($this->tag($tag, true) && $this->argumentDef($args, $is_vararg) &&
+			($this->guards($guards) || true) &&
+			$this->literal('{'))
+		{
+			$block = $this->pushBlock($this->fixTags(array($tag)));
+			$block->args = $args;
+			$block->is_vararg = $is_vararg;
+			if (!empty($guards)) $block->guards = $guards;
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		// opening a simple block
+		if ($this->tags($tags) && $this->literal('{')) {
+			$tags = $this->fixTags($tags);
+			$this->pushBlock($tags);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		// closing a block
+		if ($this->literal('}')) {
+			try {
+				$block = $this->pop();
+			} catch (exception $e) {
+				$this->seek($s);
+				$this->throwError($e->getMessage());
+			}
+
+			$hidden = true;
+			if (!isset($block->args)) foreach ($block->tags as $tag) {
+				if (!is_string($tag) || $tag{0} != $this->lessc->mPrefix) {
+					$hidden = false;
+					break;
+				}
+			}
+
+			if (!$hidden) $this->append(array('block', $block), $s);
+
+			foreach ($block->tags as $tag) {
+				if (is_string($tag)) {
+					$this->env->children[$tag][] = $block;
+				}
+			}
+
+			return true;
+		}
+
+		// mixin
+		if ($this->mixinTags($tags) &&
+			($this->argumentValues($argv) || true) &&
+			($this->keyword($suffix) || true) && $this->end())
+		{
+			$tags = $this->fixTags($tags);
+			$this->append(array('mixin', $tags, $argv, $suffix), $s);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		// spare ;
+		if ($this->literal(';')) return true;
+
+		return false; // got nothing, throw error
+	}
+
+	protected function fixTags($tags) {
+		// move @ tags out of variable namespace
+		foreach ($tags as &$tag) {
+			if ($tag{0} == $this->lessc->vPrefix)
+				$tag[0] = $this->lessc->mPrefix;
+		}
+		return $tags;
+	}
+
+	protected function keyframeTags(&$tags) {
+		$s = $this->seek();
+		$tags = array();
+		while($this->match("(to|from|[0-9]+%)", $m)) {
+			$tags[] = $m[1];
+			if (!$this->literal(",")) break;
+		}
+
+		if (count($tags) == 0) {
+			$this->seek($s);
+			return false;
+		}
+
+		return true;
+	}
+
+	// a list of expressions
+	protected function expressionList(&$exps) {
+		$values = array();
+
+		while ($this->expression($exp)) {
+			$values[] = $exp;
+		}
+
+		if (count($values) == 0) return false;
+
+		$exps = lessc::compressList($values, ' ');
+		return true;
+	}
+
+	/**
+	 * Attempt to consume an expression.
+	 * @link http://en.wikipedia.org/wiki/Operator-precedence_parser#Pseudo-code
+	 */
+	protected function expression(&$out) {
+		$s = $this->seek();
+		if ($this->literal('(') && ($this->inParens = true) && $this->expression($exp) && $this->literal(')')) {
+			$lhs = $exp;
+		} elseif ($this->seek($s) && $this->value($val)) {
+			$lhs = $val;
+		} else {
+			$this->inParens = false;
+			$this->seek($s);
+			return false;
+		}
+
+		$out = $this->expHelper($lhs, 0);
+
+		// look for / shorthand
+		if (!empty($this->env->supressedDivision)) {
+			unset($this->env->supressedDivision);
+			$s = $this->seek();
+			if ($this->literal("/") && $this->value($rhs)) {
+				$out = array("list", "",
+					array($out, array("keyword", "/"), $rhs));
+			} else {
+				$this->seek($s);
+			}
+		}
+
+		$this->inParens = false;
+		return true;
+	}
+
+	/**
+	 * recursively parse infix equation with $lhs at precedence $minP
+	 */
+	protected function expHelper($lhs, $minP) {
+		$this->inExp = true;
+		$ss = $this->seek();
+
+		// if there was whitespace before the operator, then we require whitespace after
+		// the operator for it to be a mathematical operator.
+
+		$needWhite = false;
+		if (!$this->inParens && preg_match('/\s/', $this->buffer{$this->count - 1})) {
+			$needWhite = true;
+		}
+
+		// try to find a valid operator
+		while ($this->match(self::$operatorString.($needWhite ? '\s' : ''), $m) && self::$precedence[$m[1]] >= $minP) {
+			if (!$this->inParens && isset($this->env->currentProperty) && $m[1] == "/" && empty($this->env->supressedDivision)) {
+				foreach (self::$supressDivisionProps as $pattern) {
+					if (preg_match($pattern, $this->env->currentProperty)) {
+						$this->env->supressedDivision = true;
+						break 2;
+					}
+				}
+			}
+
+			// get rhs
+			$s = $this->seek();
+			$p = $this->inParens;
+			if ($this->literal('(') && ($this->inParens = true) && $this->expression($exp) && $this->literal(')')) {
+				$this->inParens = $p;
+				$rhs = $exp;
+			} else {
+				$this->inParens = $p;
+				if ($this->seek($s) && $this->value($val)) {
+					$rhs = $val;
+				} else {
+					break;
+				}
+			}
+
+			// peek for next operator to see what to do with rhs
+			if ($this->peek(self::$operatorString, $next) && self::$precedence[$next[1]] > self::$precedence[$m[1]]) {
+				$rhs = $this->expHelper($rhs, self::$precedence[$next[1]]);
+			}
+
+			$lhs = array('expression', $m[1], $lhs, $rhs);
+			$ss = $this->seek();
+
+			$needWhite = false;
+			if (!$this->inParens && preg_match('/\s/', $this->buffer{$this->count - 1})) {
+				$needWhite = true;
+			}
+		}
+		$this->seek($ss);
+
+		return $lhs;
+	}
+
+	// consume a list of values for a property
+	public function propertyValue(&$value, $keyName=null) {
+		$values = array();
+
+		if (!is_null($keyName)) $this->env->currentProperty = $keyName;
+
+		$s = null;
+		while ($this->expressionList($v)) {
+			$values[] = $v;
+			$s = $this->seek();
+			if (!$this->literal(',')) break;
+		}
+
+		if ($s) $this->seek($s);
+
+		if (!is_null($keyName)) unset($this->env->currentProperty);
+
+		if (count($values) == 0) return false;
+
+		$value = lessc::compressList($values, ', ');
+		return true;
+	}
+
+	// a single value
+	protected function value(&$value) {
+		// try a unit
+		if ($this->unit($value)) return true;
+
+		// see if there is a negation
+		$s = $this->seek();
+		if ($this->literal('-', false)) {
+			$value = null;
+			if ($this->variable($var)) {
+				$value = array('variable', $var);
+			} elseif ($this->buffer{$this->count} == "(" && $this->expression($exp)) {
+				$value = $exp;
+			} else {
+				$this->seek($s);
+			}
+
+			if (!is_null($value)) {
+				$value = array('negative', $value);
+				return true;
+			}
+		} else {
+			$this->seek($s);
+		}
+
+		// accessor
+		// must be done before color
+		// this needs negation too
+		if ($this->accessor($a)) {
+			$a[1] = $this->fixTags($a[1]);
+			$value = $a;
+			return true;
+		}
+
+		// color
+		if ($this->color($value)) return true;
+
+		// css function
+		// must be done after color
+		if ($this->func($value)) return true;
+
+		// string
+		if ($this->string($tmp, $d)) {
+			$value = array('string', $d.$tmp.$d);
+			return true;
+		}
+
+		// try a keyword
+		if ($this->keyword($word)) {
+			$value = array('keyword', $word);
+			return true;
+		}
+
+		// try a variable
+		if ($this->variable($var)) {
+			$value = array('variable', $var);
+			return true;
+		}
+
+		// unquote string
+		if ($this->literal("~") && $this->string($value, $d)) {
+			$value = array("escape", $value);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		// css hack: \0
+		if ($this->literal('\\') && $this->match('([0-9]+)', $m)) {
+			$value = array('keyword', '\\'.$m[1]);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		return false;
+	}
+
+	// an import statement
+	protected function import(&$url, &$media) {
+		$s = $this->seek();
+		if (!$this->literal('@import')) return false;
+
+		// @import "something.css" media;
+		// @import url("something.css") media;
+		// @import url(something.css) media;
+
+		if ($this->literal('url(')) $parens = true; else $parens = false;
+
+		if (!$this->string($url)) {
+			if ($parens && $this->to(')', $url)) {
+				$parens = false; // got em
+			} else {
+				$this->seek($s);
+				return false;
+			}
+		}
+
+		if ($parens && !$this->literal(')')) {
+			$this->seek($s);
+			return false;
+		}
+
+		// now the rest is media
+		return $this->to(';', $media, false, true);
+	}
+
+	// a list of media types, very lenient
+	protected function mediaTypes(&$parts) {
+		$parts = array();
+		while ($this->to("(", $chunk, false, "[^{]")) {
+			$parts[] = array('raw', $chunk."(");
+			$s = $this->seek();
+			if ($this->keyword($name) && $this->assign() &&
+				$this->propertyValue($value))
+			{
+				$parts[] = array('assign', $name, $value);
+			} else {
+				$this->seek($s);
+			}
+		}
+
+		if ($this->to('{', $rest, true, true)) {
+			$parts[] = array('raw', $rest);
+			return true;
+		}
+
+		$parts = null;
+		return false;
+	}
+
+	// a scoped value accessor
+	// .hello > @scope1 > @scope2['value'];
+	protected function accessor(&$var) {
+		$s = $this->seek();
+
+		if (!$this->tags($scope, true, '>') || !$this->literal('[')) {
+			$this->seek($s);
+			return false;
+		}
+
+		// either it is a variable or a property
+		// why is a property wrapped in quotes, who knows!
+		if ($this->variable($name)) {
+			// ~
+		} elseif ($this->literal("'") && $this->keyword($name) && $this->literal("'")) {
+			// .. $this->count is messed up if we wanted to test another access type
+		} else {
+			$this->seek($s);
+			return false;
+		}
+
+		if (!$this->literal(']')) {
+			$this->seek($s);
+			return false;
+		}
+
+		$var = array('lookup', $scope, $name);
+		return true;
+	}
+
+	// a string
+	protected function string(&$string, &$d = null) {
+		$s = $this->seek();
+		if ($this->literal('"', false)) {
+			$delim = '"';
+		} elseif ($this->literal("'", false)) {
+			$delim = "'";
+		} else {
+			return false;
+		}
+
+		if (!$this->to($delim, $string)) {
+			$this->seek($s);
+			return false;
+		}
+
+		$d = $delim;
+		return true;
+	}
+
+	/**
+	 * Consume a number and optionally a unit.
+	 * Can also consume a font shorthand if it is a simple case.
+	 * $allowed restricts the types that are matched.
+	 */
+	protected function unit(&$unit, $allowed = null) {
+		if (!$allowed) $allowed = self::$units;
+
+		if ($this->match('(-?[0-9]*(\.)?[0-9]+)('.implode('|', $allowed).')?', $m)) {
+			if (!isset($m[3])) $m[3] = 'number';
+			$unit = array($m[3], $m[1]);
+
+			return true;
+		}
+
+		return false;
+	}
+
+	// a # color
+	protected function color(&$out) {
+		$color = array('color');
+
+		if ($this->match('(#([0-9a-f]{6})|#([0-9a-f]{3}))', $m)) {
+			if (isset($m[3])) {
+				$num = $m[3];
+				$width = 16;
+			} else {
+				$num = $m[2];
+				$width = 256;
+			}
+
+			$num = hexdec($num);
+			foreach (array(3,2,1) as $i) {
+				$t = $num % $width;
+				$num /= $width;
+
+				$color[$i] = $t * (256/$width) + $t * floor(16/$width);
+			}
+
+			$out = $color;
+			return true;
+		}
+
+		return false;
+	}
+
+	// consume a list of property values delimited by ; and wrapped in ()
+	protected function argumentValues(&$args, $delim = ',') {
+		$s = $this->seek();
+		if (!$this->literal('(')) return false;
+
+		$values = array();
+		while (true) {
+			if ($this->expressionList($value)) $values[] = $value;
+			if (!$this->literal($delim)) break;
+			else {
+				if ($value == null) $values[] = null;
+				$value = null;
+			}
+		}
+
+		if (!$this->literal(')')) {
+			$this->seek($s);
+			return false;
+		}
+
+		$args = $values;
+		return true;
+	}
+
+	// consume an argument definition list surrounded by ()
+	// each argument is a variable name with optional value
+	// or at the end a ... or a variable named followed by ...
+	protected function argumentDef(&$args, &$is_vararg, $delim = ',') {
+		$s = $this->seek();
+		if (!$this->literal('(')) return false;
+
+		$values = array();
+
+		$is_vararg = false;
+		while (true) {
+			if ($this->literal("...")) {
+				$is_vararg = true;
+				break;
+			}
+
+			if ($this->variable($vname)) {
+				$arg = array("arg", $vname);
+				$ss = $this->seek();
+				if ($this->assign() && $this->expressionList($value)) {
+					$arg[] = $value;
+				} else {
+					$this->seek($ss);
+					if ($this->literal("...")) {
+						$arg[0] = "rest";
+						$is_vararg = true;
+					}
+				}
+				$values[] = $arg;
+				if ($is_vararg) break;
+				continue;
+			}
+
+			if ($this->value($literal)) {
+				$values[] = array("lit", $literal);
+			}
+
+			if (!$this->literal($delim)) break;
+		}
+
+		if (!$this->literal(')')) {
+			$this->seek($s);
+			return false;
+		}
+
+		$args = $values;
+
+		return true;
+	}
+
+	// consume a list of tags
+	// this accepts a hanging delimiter
+	protected function tags(&$tags, $simple = false, $delim = ',') {
+		$tags = array();
+		while ($this->tag($tt, $simple)) {
+			$tags[] = $tt;
+			if (!$this->literal($delim)) break;
+		}
+		if (count($tags) == 0) return false;
+
+		return true;
+	}
+
+	// list of tags of specifying mixin path
+	// optionally separated by > (lazy, accepts extra >)
+	function mixinTags(&$tags) {
+		$s = $this->seek();
+		$tags = array();
+		while ($this->tag($tt, true)) {
+			$tags[] = $tt;
+			$this->literal(">");
+		}
+
+		if (count($tags) == 0) return false;
+
+		return true;
+	}
+
+	// a bracketed value (contained within in a tag definition)
+	protected function tagBracket(&$value) {
+		$s = $this->seek();
+		if ($this->literal('[') && $this->to(']', $c, true) && $this->literal(']', false)) {
+			$value = '['.$c.']';
+			// whitespace?
+			if ($this->match('', $_)) $value .= $_[0];
+
+			// escape parent selector, (yuck)
+			$value = str_replace($this->lessc->parentSelector, "$&$", $value);
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	protected function tagExpression(&$value) {
+		$s = $this->seek();
+		if ($this->literal("(") && $this->expression($exp) && $this->literal(")")) {
+			$value = array('exp', $exp);
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	// a single tag
+	protected function tag(&$tag, $simple = false) {
+		if ($simple)
+			$chars = '^,:;{}\][>\(\) "\'';
+		else
+			$chars = '^,;{}["\'';
+
+		if (!$simple && $this->tagExpression($tag)) {
+			return true;
+		}
+
+		$tag = '';
+		while ($this->tagBracket($first)) $tag .= $first;
+		while ($this->match('(['.$chars.'0-9]['.$chars.']*)', $m)) {
+			$tag .= $m[1];
+			if ($simple) break;
+
+			while ($this->tagBracket($brack)) $tag .= $brack;
+		}
+		$tag = trim($tag);
+		if ($tag == '') return false;
+
+		return true;
+	}
+
+	// a css function
+	protected function func(&$func) {
+		$s = $this->seek();
+
+		if ($this->match('(%|[\w\-_][\w\-_:\.]+|[\w_])', $m) && $this->literal('(')) {
+			$fname = $m[1];
+
+			$s_pre_args = $this->seek();
+
+			$args = array();
+			while (true) {
+				$ss = $this->seek();
+				// this ugly nonsense is for ie filter properties
+				if ($this->keyword($name) && $this->literal('=') && $this->expressionList($value)) {
+					$args[] = array('list', '=', array(array('keyword', $name), $value));
+				} else {
+					$this->seek($ss);
+					if ($this->expressionList($value)) {
+						$args[] = $value;
+					}
+				}
+
+				if (!$this->literal(',')) break;
+			}
+			$args = array('list', ',', $args);
+
+			if ($this->literal(')')) {
+				$func = array('function', $fname, $args);
+				return true;
+			} elseif ($fname == 'url') {
+				// couldn't parse and in url? treat as string
+				$this->seek($s_pre_args);
+				if ($this->to(')', $content, true) && $this->literal(')')) {
+					$func = array('function', $fname,array('string', $content));
+					return true;
+				}
+			}
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	// consume a less variable
+	protected function variable(&$name) {
+		$s = $this->seek();
+		if ($this->literal($this->lessc->vPrefix, false) &&
+			($this->variable($sub) || $this->keyword($name)))
+		{
+			if (!empty($sub)) {
+				$name = array('variable', $sub);
+			} else {
+				$name = $this->lessc->vPrefix.$name;
+			}
+			return true;
+		}
+
+		$name = null;
+		$this->seek($s);
+		return false;
+	}
+
+	/**
+	 * Consume an assignment operator
+	 * Can optionally take a name that will be set to the current property name
+	 */
+	protected function assign($name = null) {
+		if ($name) $this->currentProperty = $name;
+		return $this->literal(':') || $this->literal('=');
+	}
+
+	// consume a keyword
+	protected function keyword(&$word) {
+		if ($this->match('([\w_\-\*!"][\w\-_"]*)', $m)) {
+			$word = $m[1];
+			return true;
+		}
+		return false;
+	}
+
+	// consume an end of statement delimiter
+	protected function end() {
+		if ($this->literal(';'))
+			return true;
+		elseif ($this->count == strlen($this->buffer) || $this->buffer{$this->count} == '}') {
+			// if there is end of file or a closing block next then we don't need a ;
+			return true;
+		}
+		return false;
+	}
+
+	protected function guards(&$guards) {
+		$s = $this->seek();
+
+		if (!$this->literal("when")) {
+			$this->seek($s);
+			return false;
+		}
+
+		$guards = array();
+
+		while ($this->guard_group($g)) {
+			$guards[] = $g;
+			if (!$this->literal(",")) break;
+		}
+
+		if (count($guards) == 0) {
+			$guards = null;
+			$this->seek($s);
+			return false;
+		}
+
+		return true;
+	}
+
+	// a bunch of guards that are and'd together
+	// TODO rename to guardGroup
+	protected function guard_group(&$guard_group) {
+		$s = $this->seek();
+		$guard_group = array();
+		while ($this->guard($guard)) {
+			$guard_group[] = $guard;
+			if (!$this->literal("and")) break;
+		}
+
+		if (count($guard_group) == 0) {
+			$guard_group = null;
+			$this->seek($s);
+			return false;
+		}
+
+		return true;
+	}
+
+	protected function guard(&$guard) {
+		$s = $this->seek();
+		$negate = $this->literal("not");
+
+		if ($this->literal("(") && $this->expression($exp) && $this->literal(")")) {
+			$guard = $exp;
+			if ($negate) $guard = array("negate", $guard);
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	/* raw parsing functions */
+
+	protected function literal($what, $eatWhitespace = true) {
+		// this is here mainly prevent notice from { } string accessor
+		if ($this->count >= strlen($this->buffer)) return false;
+
+		// shortcut on single letter
+		if (!$eatWhitespace && strlen($what) == 1) {
+			if ($this->buffer{$this->count} == $what) {
+				$this->count++;
+				return true;
+			}
+			else return false;
+		}
+
+		return $this->match(lessc::preg_quote($what), $m, $eatWhitespace);
+	}
+
+
+	// advance counter to next occurrence of $what
+	// $until - don't include $what in advance
+	// $allowNewline, if string, will be used as valid char set
+	protected function to($what, &$out, $until = false, $allowNewline = false) {
+		if (is_string($allowNewline)) {
+			$validChars = $allowNewline;
+		} else {
+			$validChars = $allowNewline ? "." : "[^\n]";
+		}
+		if (!$this->match('('.$validChars.'*?)'.lessc::preg_quote($what), $m, !$until)) return false;
+		if ($until) $this->count -= strlen($what); // give back $what
+		$out = $m[1];
+		return true;
+	}
+
+	// try to match something on head of buffer
+	protected function match($regex, &$out, $eatWhitespace = true) {
+		$r = '/'.$regex.($eatWhitespace ? '\s*' : '').'/Ais';
+		if (preg_match($r, $this->buffer, $out, null, $this->count)) {
+			$this->count += strlen($out[0]);
+			return true;
+		}
+		return false;
+	}
+
+	// match something without consuming it
+	protected function peek($regex, &$out = null, $from=null) {
+		if (is_null($from)) $from = $this->count;
+		$r = '/'.$regex.'/Ais';
+		$result = preg_match($r, $this->buffer, $out, null, $from);
+
+		return $result;
+	}
+
+	// seek to a spot in the buffer or return where we are on no argument
+	protected function seek($where = null) {
+		if ($where === null) return $this->count;
+		else $this->count = $where;
+		return true;
+	}
+
+	/* misc functions */
+
+	public function throwError($msg = "parse error", $count = null) {
+		$count = is_null($count) ? $this->count : $count;
+
+		$line = $this->line +
+			substr_count(substr($this->buffer, 0, $count), "\n");
+
+		if (!empty($this->sourceName)) {
+			$loc = "$this->sourceName on line $line";
+		} else {
+			$loc = "line: $line";
+		}
+
+		// TODO this depends on $this->count
+		if ($this->peek("(.*?)(\n|$)", $m, $count)) {
+			throw new exception("$msg: failed at `$m[1]` $loc");
+		} else {
+			throw new exception("$msg: $loc");
+		}
+	}
+
+	protected function pushBlock($tags) {
+		$b = new stdclass;
+		$b->parent = $this->env;
+
+		$b->id = self::$nextBlockId++;
+		$b->is_vararg = false;
+		$b->tags = $tags;
+		$b->props = array();
+		$b->children = array();
+
+		$this->env = $b;
+		return $b;
+	}
+
+	// push a block that doesn't multiply tags
+	protected function pushSpecialBlock($name) {
+		$b = $this->pushBlock(array($name));
+		$b->no_multiply = true;
+		return $b;
+	}
+
+	// append a property to the current block
+	function append($prop, $pos = null) {
+		if (!is_null($pos)) $prop[-1] = $pos;
+		$this->env->props[] = $prop;
+	}
+
+	// pop something off the stack
+	function pop() {
+		$old = $this->env;
+		$this->env = $this->env->parent;
+		return $old;
+	}
+
+	// remove comments from $text
+	// todo: make it work for all functions, not just url
+	protected function removeComments($text) {
+		$look = array(
+			'url(', '//', '/*', '"', "'"
+		);
+
+		$out = '';
+		$min = null;
+		$done = false;
+		while (true) {
+			// find the next item
+			foreach ($look as $token) {
+				$pos = strpos($text, $token);
+				if ($pos !== false) {
+					if (!isset($min) || $pos < $min[1]) $min = array($token, $pos);
+				}
+			}
+
+			if (is_null($min)) break;
+
+			$count = $min[1];
+			$skip = 0;
+			$newlines = 0;
+			switch ($min[0]) {
+			case 'url(':
+				if (preg_match('/url\(.*?\)/', $text, $m, 0, $count))
+					$count += strlen($m[0]) - strlen($min[0]);
+				break;
+			case '"':
+			case "'":
+				if (preg_match('/'.$min[0].'.*?'.$min[0].'/', $text, $m, 0, $count))
+					$count += strlen($m[0]) - 1;
+				break;
+			case '//':
+				$skip = strpos($text, "\n", $count);
+				if ($skip === false) $skip = strlen($text) - $count;
+				else $skip -= $count;
+				break;
+			case '/*':
+				if (preg_match('/\/\*.*?\*\//s', $text, $m, 0, $count)) {
+					$skip = strlen($m[0]);
+					$newlines = substr_count($m[0], "\n");
+				}
+				break;
+			}
+
+			if ($skip == 0) $count += strlen($min[0]);
+
+			$out .= substr($text, 0, $count).str_repeat("\n", $newlines);
+			$text = substr($text, $count + $skip);
+
+			$min = null;
+		}
+
+		return $out.$text;
+	}
+
+}
+
+class lessc_formatter {
+	public $indentChar = "  ";
+
+	public $break = "\n";
+	public $open = " {";
+	public $close = "}";
+	public $tagSeparator = ", ";
+
+	public $disableSingle = false;
+	public $openSingle = " { ";
+	public $closeSingle = " }";
+
+	// returns the amount of indent that should happen for a block
+	function indentAmount($block) {
+		return isset($block->isRoot) || !empty($block->no_multiply) ? 1 : 0;
+	}
+
+	// an $indentLevel of -1 signifies the root level
+	function block($tags, $wrapChildren, $lines, $children, $indentLevel) {
+		$indent = str_repeat($this->indentChar, max($indentLevel, 0));
+
+		// what $lines is imploded by
+		$nl = $indentLevel == -1 ? $this->break :
+			$this->break.$indent.$this->indentChar;
+
+		ob_start();
+
+		$isSingle = !$this->disableSingle && !$wrapChildren
+			&& count($lines) <= 1;
+
+		$showDelim = !empty($tags) && (count($lines) > 0 || $wrapChildren);
+
+		if ($showDelim) {
+			if (is_array($tags)) {
+				$tags = implode($this->tagSeparator, $tags);
+			}
+
+			echo $indent.$tags;
+			if ($isSingle) echo $this->openSingle;
+			else {
+				echo $this->open;
+				if (!empty($lines)) echo $nl;
+				else echo $this->break;
+			}
+		}
+
+		echo implode($nl, $lines);
+
+		if ($wrapChildren) {
+			if (!empty($lines)) echo $this->break;
+			foreach ($children as $child) echo $child;
+		}
+
+		if ($showDelim) {
+			if ($isSingle) echo $this->closeSingle;
+			else {
+				if (!$wrapChildren) echo $this->break;
+				echo $indent.$this->close;
+			}
+			echo $this->break;
+		} elseif (!empty($lines)) {
+			echo $this->break;
+		}
+
+		if (!$wrapChildren)
+			foreach ($children as $child) echo $child;
+
+		return ob_get_clean();
+	}
+
+	function property($name, $values) {
+		return "";
+	}
+}
+
+class lessc_formatter_compressed extends lessc_formatter {
+	public $indentChar = "";
+
+	public $break = "";
+	public $open = "{";
+	public $close = "}";
+	public $tagSeparator = ",";
+	public $disableSingle = true;
+}
+
+class lessc_formatter_indent extends lessc_formatter {
+	function indentAmount($block) {
+		if (isset($block->isRoot)) return 1;
+		$numLines = 0;
+		foreach ($block->props as $prop) {
+			$t = $prop[0];
+			if ($t != 'block' && $t != 'mixin') {
+				$numLines++;
+			}
+		}
+		return $numLines > 0 ? 1 : 0;
+	}
+}
+
diff --git a/mod/less/vendors/lessphp/lessify b/mod/less/vendors/lessphp/lessify
new file mode 100755
index 000000000..416f0ca4c
--- /dev/null
+++ b/mod/less/vendors/lessphp/lessify
@@ -0,0 +1,23 @@
+#!/usr/bin/php -q
+<?php
+
+if (php_sapi_name() != "cli") { 
+	err($fa.$argv[0]." must be run in the command line.");
+	exit(1);
+}
+$exe = array_shift($argv); // remove filename
+
+if (!$fname = array_shift($argv)) {
+	exit("Usage: ".$exe." input-file\n");
+}
+
+require "lessify.inc.php";
+
+try  {
+	$parser = new lessify($fname);
+	echo $parser->parse();
+} catch (exception $e) {
+	exit("Fatal error: ".$e->getMessage()."\n");
+}
+
+
diff --git a/mod/less/vendors/lessphp/lessify.inc.php b/mod/less/vendors/lessphp/lessify.inc.php
new file mode 100644
index 000000000..96d7d2a92
--- /dev/null
+++ b/mod/less/vendors/lessphp/lessify.inc.php
@@ -0,0 +1,447 @@
+<?php
+/**
+ * lessify
+ * Convert a css file into a less file
+ * http://leafo.net/lessphp
+ * Copyright 2010, leaf corcoran <leafot@gmail.com>
+ *
+ * WARNING: THIS DOES NOT WORK ANYMORE. NEEDS TO BE UPDATED FOR
+ * LATEST VERSION OF LESSPHP.
+ *
+ */
+
+require "lessc.inc.php";
+
+//
+// check if the merge during mixin is overwriting values. should or should it not?
+//
+
+//
+// 1. split apart class tags
+//
+
+class easyparse {
+	var $buffer;
+	var $count;
+
+	function __construct($str) {
+		$this->count = 0;
+		$this->buffer = trim($str);
+	}
+
+	function seek($where = null) {
+		if ($where === null) return $this->count;
+		else $this->count = $where;
+		return true;
+	}
+
+	function preg_quote($what) {
+		return preg_quote($what, '/');
+	}
+
+	function match($regex, &$out, $eatWhitespace = true) {
+		$r = '/'.$regex.($eatWhitespace ? '\s*' : '').'/Ais';
+		if (preg_match($r, $this->buffer, $out, null, $this->count)) {
+			$this->count += strlen($out[0]);
+			return true;
+		}
+		return false;
+	}
+
+	function literal($what, $eatWhitespace = true) {
+		// this is here mainly prevent notice from { } string accessor 
+		if ($this->count >= strlen($this->buffer)) return false;
+
+		// shortcut on single letter
+		if (!$eatWhitespace and strlen($what) == 1) {
+			if ($this->buffer{$this->count} == $what) {
+				$this->count++;
+				return true;
+			}
+			else return false;
+		}
+
+		return $this->match($this->preg_quote($what), $m, $eatWhitespace);
+	}
+
+}
+
+class tagparse extends easyparse {
+	static private $combinators = null;
+	static private $match_opts = null;
+
+	function parse() {
+		if (empty(self::$combinators)) {
+			self::$combinators = '('.implode('|', array_map(array($this, 'preg_quote'),
+				array('+', '>', '~'))).')';
+			self::$match_opts = '('.implode('|', array_map(array($this, 'preg_quote'),
+				array('=', '~=', '|=', '$=', '*='))).')';
+		}
+
+		// crush whitespace
+		$this->buffer = preg_replace('/\s+/', ' ', $this->buffer).' ';
+
+		$tags = array();
+		while ($this->tag($t)) $tags[] = $t;
+
+		return $tags;
+	}
+
+	static function compileString($string) {
+		list(, $delim, $str) = $string;
+		$str = str_replace($delim, "\\".$delim, $str);
+		$str = str_replace("\n", "\\\n", $str);
+		return $delim.$str.$delim;
+	}
+
+	static function compilePaths($paths) {
+		return implode(', ', array_map(array('self', 'compilePath'), $paths));
+	}
+
+	// array of tags
+	static function compilePath($path) {
+		return implode(' ', array_map(array('self', 'compileTag'), $path));
+	}
+
+
+	static function compileTag($tag) {
+		ob_start();
+		if (isset($tag['comb'])) echo $tag['comb']." ";
+		if (isset($tag['front'])) echo $tag['front'];
+		if (isset($tag['attr'])) {
+			echo '['.$tag['attr'];
+			if (isset($tag['op'])) {
+				echo $tag['op'].$tag['op_value'];
+			}
+			echo ']';
+		}
+		return ob_get_clean();
+	}
+
+	function string(&$out) {
+		$s = $this->seek();
+
+		if ($this->literal('"')) {
+			$delim = '"';
+		} elseif ($this->literal("'")) {
+			$delim = "'";
+		} else {
+			return false;
+		}
+
+		while (true) {
+			// step through letters looking for either end or escape
+			$buff = "";
+			$escapeNext = false;
+			$finished = false;
+			for ($i = $this->count; $i < strlen($this->buffer); $i++) {
+				$char = $this->buffer[$i];
+				switch ($char) {
+				case $delim:
+					if ($escapeNext) {
+						$buff .= $char;
+						$escapeNext = false;
+						break;
+					}
+					$finished = true;
+					break 2;
+				case "\\":
+					if ($escapeNext) {
+						$buff .= $char;
+						$escapeNext = false;
+					} else {
+						$escapeNext = true;
+					}
+					break;
+				case "\n":
+					if (!$escapeNext) {
+						break 3;
+					}
+					
+					$buff .= $char;
+					$escapeNext = false;
+					break;
+				default:
+					if ($escapeNext) {
+						$buff .= "\\";
+						$escapeNext = false;
+					}
+					$buff .= $char;
+				}
+			}
+			if (!$finished) break;
+			$out = array('string', $delim, $buff);
+			$this->seek($i+1);
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	function tag(&$out) {
+		$s = $this->seek();
+		$tag = array();
+		if ($this->combinator($op)) $tag['comb'] = $op;
+
+		if (!$this->match('(.*?)( |$|\[|'.self::$combinators.')', $match)) {
+			$this->seek($s);
+			return false;
+		}
+
+		if (!empty($match[3])) {
+			// give back combinator
+			$this->count-=strlen($match[3]);
+		}
+
+		if (!empty($match[1])) $tag['front'] = $match[1];
+
+		if ($match[2] == '[') {
+			if ($this->ident($i)) {
+				$tag['attr'] = $i;
+
+				if ($this->match(self::$match_opts, $m) && $this->value($v)) {
+					$tag['op'] = $m[1];
+					$tag['op_value'] = $v;
+				}
+
+				if ($this->literal(']')) {
+					$out = $tag;
+					return true;
+				}
+			}
+		} elseif (isset($tag['front'])) {
+			$out = $tag;
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	function ident(&$out) {
+		// [-]?{nmstart}{nmchar}*
+		// nmstart: [_a-z]|{nonascii}|{escape}
+		// nmchar: [_a-z0-9-]|{nonascii}|{escape}
+		if ($this->match('(-?[_a-z][_\w]*)', $m)) {
+			$out = $m[1];
+			return true;
+		}
+		return false;
+	}
+
+	function value(&$out) {
+		if ($this->string($str)) {
+			$out = $this->compileString($str);
+			return true;
+		} elseif ($this->ident($id)) {
+			$out = $id;
+			return true;
+		}
+		return false;
+	}
+
+
+	function combinator(&$op) {
+		if ($this->match(self::$combinators, $m)) {
+			$op = $m[1];
+			return true;
+		}
+		return false;
+	}
+}
+
+class nodecounter {
+	var $count = 0;
+	var $children = array();
+
+	var $name;
+	var $child_blocks;
+	var $the_block;
+
+	function __construct($name) {
+		$this->name = $name;
+	}
+
+	function dump($stack = null) {
+		if (is_null($stack)) $stack = array();
+		$stack[] = $this->getName();
+		echo implode(' -> ', $stack)." ($this->count)\n";
+		foreach ($this->children as $child) {
+			$child->dump($stack);
+		}
+	}
+
+	static function compileProperties($c, $block) {
+		foreach($block as $name => $value) {
+			if ($c->isProperty($name, $value)) {
+				echo $c->compileProperty($name, $value)."\n";
+			}
+		}
+	}
+
+	function compile($c, $path = null) {
+		if (is_null($path)) $path = array();
+		$path[] = $this->name;
+
+		$isVisible = !is_null($this->the_block) || !is_null($this->child_blocks);
+
+		if ($isVisible) {
+			echo $c->indent(implode(' ', $path).' {');
+			$c->indentLevel++;
+			$path = array();
+
+			if ($this->the_block) {
+				$this->compileProperties($c, $this->the_block);
+			}
+
+			if ($this->child_blocks) {
+				foreach ($this->child_blocks as $block) {
+					echo $c->indent(tagparse::compilePaths($block['__tags']).' {');
+					$c->indentLevel++;
+					$this->compileProperties($c, $block);
+					$c->indentLevel--;
+					echo $c->indent('}');
+				}
+			}
+		}
+
+		// compile child nodes
+		foreach($this->children as $node) {
+			$node->compile($c, $path);
+		}
+
+		if ($isVisible) {
+			$c->indentLevel--;
+			echo $c->indent('}');
+		}
+
+	}
+
+	function getName() {
+		if (is_null($this->name)) return "[root]";
+		else return $this->name;
+	}
+
+	function getNode($name) {
+		if (!isset($this->children[$name])) {
+			$this->children[$name] = new nodecounter($name);
+		}
+
+		return $this->children[$name];
+	}
+
+	function findNode($path) {
+		$current = $this;
+		for ($i = 0; $i < count($path); $i++) {
+			$t = tagparse::compileTag($path[$i]);
+			$current = $current->getNode($t);
+		}
+
+		return $current;
+	}
+
+	function addBlock($path, $block) {
+		$node = $this->findNode($path);
+		if (!is_null($node->the_block)) throw new exception("can this happen?");
+
+		unset($block['__tags']);
+		$node->the_block = $block;
+	}
+
+	function addToNode($path, $block) {
+		$node = $this->findNode($path);
+		$node->child_blocks[] = $block;
+	}
+}
+
+/**
+ * create a less file from a css file by combining blocks where appropriate
+ */
+class lessify extends lessc {
+	public function dump() {
+		print_r($this->env);
+	}
+
+	public function parse($str = null) {
+		$this->prepareParser($str ? $str : $this->buffer);
+		while (false !== $this->parseChunk());
+
+		$root = new nodecounter(null);
+
+		// attempt to preserve some of the block order
+		$order = array();
+
+		$visitedTags = array();
+		foreach (end($this->env) as $name => $block) {
+			if (!$this->isBlock($name, $block)) continue;
+			if (isset($visitedTags[$name])) continue;
+
+			foreach ($block['__tags'] as $t) {
+				$visitedTags[$t] = true;
+			}
+
+			// skip those with more than 1
+			if (count($block['__tags']) == 1) {
+				$p = new tagparse(end($block['__tags']));
+				$path = $p->parse();
+				$root->addBlock($path, $block);
+				$order[] = array('compressed', $path, $block);
+				continue;
+			} else {
+				$common = null;
+				$paths = array();
+				foreach ($block['__tags'] as $rawtag) {
+					$p = new tagparse($rawtag);
+					$paths[] = $path = $p->parse();
+					if (is_null($common)) $common = $path;
+					else {
+						$new_common = array();
+						foreach ($path as $tag) {
+							$head = array_shift($common);
+							if ($tag == $head) {
+								$new_common[] = $head;
+							} else break;
+						}
+						$common = $new_common;
+						if (empty($common)) {
+							// nothing in common
+							break;
+						}
+					}
+				}
+
+				if (!empty($common)) {
+					$new_paths = array();
+					foreach ($paths as $p) $new_paths[] = array_slice($p, count($common));
+					$block['__tags'] = $new_paths;
+					$root->addToNode($common, $block);
+					$order[] = array('compressed', $common, $block);
+					continue;
+				}
+				
+			}
+
+			$order[] = array('none', $block['__tags'], $block);
+		}
+
+
+		$compressed = $root->children;
+		foreach ($order as $item) {
+			list($type, $tags, $block) = $item;
+			if ($type == 'compressed') {
+				$top = tagparse::compileTag(reset($tags));
+				if (isset($compressed[$top])) {
+					$compressed[$top]->compile($this);
+					unset($compressed[$top]);
+				}
+			} else {
+				echo $this->indent(implode(', ', $tags).' {');
+				$this->indentLevel++;
+				nodecounter::compileProperties($this, $block);
+				$this->indentLevel--;
+				echo $this->indent('}');
+			}
+		}
+	}
+}
diff --git a/mod/less/vendors/lessphp/package.sh b/mod/less/vendors/lessphp/package.sh
new file mode 100755
index 000000000..1c871a147
--- /dev/null
+++ b/mod/less/vendors/lessphp/package.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+# creates tar.gz for current version
+
+VERSION=`./plessc -v | sed -n 's/^v\(.*\)$/\1/p'`
+OUT_DIR="tmp/lessphp"
+TMP=`dirname $OUT_DIR`
+
+mkdir -p $OUT_DIR
+tar -c `git ls-files` | tar -C $OUT_DIR -x 
+
+rm $OUT_DIR/.gitignore
+rm $OUT_DIR/package.sh
+rm $OUT_DIR/lessify
+rm $OUT_DIR/lessify.inc.php
+
+OUT_NAME="lessphp-$VERSION.tar.gz"
+tar -czf $OUT_NAME -C $TMP lessphp/
+echo "Wrote $OUT_NAME"
+
+rm -r $TMP
+
diff --git a/mod/less/vendors/lessphp/plessc b/mod/less/vendors/lessphp/plessc
new file mode 100755
index 000000000..af07293e1
--- /dev/null
+++ b/mod/less/vendors/lessphp/plessc
@@ -0,0 +1,217 @@
+#!/usr/bin/php -q
+<?php
+// Command line utility to compile LESS to STDOUT
+// Leaf Corcoran <leafot@gmail.com>, 2012
+
+$exe = array_shift($argv); // remove filename
+
+$HELP = <<<EOT
+Usage: $exe [options] input-file [output-file]
+
+Options include:
+
+    -h, --help  Show this message
+    -v          Print the version
+    -f=format   Set the output format, includes "default", "compressed"
+    -r          Read from STDIN instead of input-file
+    -w          Watch input-file, and compile to output-file if it is changed
+    -T          Dump formatted parse tree
+    -X          Dump raw parse tree
+
+
+EOT;
+
+$opts = getopt('hvrwnXTf:', array('help'));
+while (count($argv) > 0 && preg_match('/^-([-hvrwnXT]$|[f]=)/', $argv[0])) {
+	array_shift($argv);
+}
+
+function has() {
+	global $opts;
+	foreach (func_get_args() as $arg) {
+		if (isset($opts[$arg])) return true;
+	}
+	return false;
+}
+
+if (has("h", "help")) {
+	exit($HELP);
+}
+
+error_reporting(E_ALL);
+$path  = realpath(dirname(__FILE__)).'/';
+
+require $path."lessc.inc.php";
+
+$VERSION = lessc::$VERSION;
+
+$fa = "Fatal Error: ";
+function err($msg) {
+	fwrite(STDERR, $msg."\n");
+}
+
+if (php_sapi_name() != "cli") {
+	err($fa.$argv[0]." must be run in the command line.");
+	exit(1);
+}
+
+function make_less($fname = null) {
+	global $opts;
+	$l = new lessc($fname);
+
+	if (has("f")) {
+		$format = $opts["f"];
+		if ($format != "default") $l->setFormatter($format);
+	}
+
+	return $l;
+}
+
+function process($data, $import = null) {
+	global $fa;
+
+	$l = make_less();
+	if ($import) $l->importDir = $import;
+
+	try {
+		echo $l->parse($data);
+		exit(0);
+	} catch (exception $ex) {
+		err($fa."\n".str_repeat('=', 20)."\n".
+			$ex->getMessage());
+		exit(1);
+	}
+}
+
+if (has("v")) {
+	exit($VERSION."\n");
+}
+
+if (has("r")) {
+	if (!empty($argv)) {
+		$data = $argv[0];
+	} else {
+		$data = "";
+		while (!feof(STDIN)) {
+			$data .= fread(STDIN, 8192);
+		}
+	}
+	exit(process($data));
+}
+
+if (has("w")) {
+	// need two files
+	if (!is_file($in = array_shift($argv)) ||
+		null == $out = array_shift($argv))
+	{
+		err($fa.$exe." -w infile outfile");
+		exit(1);
+	}
+
+	echo "Watching ".$in.
+		(has("n") ? ' with notifications' : '').
+		", press Ctrl + c to exit.\n";
+
+	$cache = $in;
+	$last_action = 0;
+	while (true) {
+		clearstatcache();
+
+		// check if anything has changed since last fail
+		$updated = false;
+		if (is_array($cache)) {
+			foreach ($cache['files'] as $fname=>$_) {
+				if (filemtime($fname) > $last_action) {
+					$updated = true;
+					break;
+				}
+			}
+		} else $updated = true;
+
+		// try to compile it
+		if ($updated) {
+			$last_action = time();
+
+			try {
+				$cache = lessc::cexecute($cache);
+				echo "Writing updated file: ".$out."\n";
+				if (!file_put_contents($out, $cache['compiled'])) {
+					err($fa."Could not write to file ".$out);
+					exit(1);
+				}
+			} catch (exception $ex) {
+				echo "\nFatal Error:\n".str_repeat('=', 20)."\n".
+					$ex->getMessage()."\n\n";
+
+				if (has("n")) {
+					`notify-send -u critical "compile failed" "{$ex->getMessage()}"`;
+				}
+			}
+		}
+
+		sleep(1);
+	}
+	exit(0);
+}
+
+if (!$fname = array_shift($argv)) {
+	echo $HELP;
+	exit(1);
+}
+
+function dumpValue($node, $depth = 0) {
+	if (is_object($node)) {
+		$indent = str_repeat("  ", $depth);
+		$out = array();
+		foreach ($node->props as $prop) {
+			$out[] = $indent . dumpValue($prop, $depth + 1);
+		}
+		$out = implode("\n", $out);
+		if (!empty($node->tags)) {
+			$out = "+ ".implode(", ", $node->tags)."\n".$out;
+		}
+		return $out;
+	} elseif (is_array($node)) {
+		if (empty($node)) return "[]";
+		$type = $node[0];
+		if ($type == "block")
+			return dumpValue($node[1], $depth);
+
+		$out = array();
+		foreach ($node as $value) {
+			$out[] = dumpValue($value, $depth);
+		}
+		return "{ ".implode(", ", $out)." }";
+	} else {
+		if (is_string($node) && preg_match("/[\s,]/", $node)) {
+			return '"'.$node.'"';
+		}
+		return $node; // normal value
+	}
+}
+
+try {
+	$less = make_less($fname);
+	if (has("T", "X")) {
+		$parser = new lessc_parser($less, $fname);
+		$tree = $parser->parse(file_get_contents($fname));
+		if (has("X"))
+			$out = print_r($tree, 1);
+		else
+			$out = dumpValue($tree)."\n";
+	} else {
+		$out = $less->parse();
+	}
+
+	if (!$fout = array_shift($argv)) {
+		echo $out;
+	} else {
+		file_put_contents($fout, $out);
+	}
+
+} catch (exception $ex) {
+	err($fa.$ex->getMessage());
+	exit(1);
+}
+
+?>
diff --git a/mod/less/vendors/lessphp/tests/README.md b/mod/less/vendors/lessphp/tests/README.md
new file mode 100644
index 000000000..edb8f7be3
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/README.md
@@ -0,0 +1,24 @@
+## test.php
+
+To run:
+
+    php test.php [flags] [test-name-glob]
+
+
+Runs through all files in `inputs`, compiles them, then compares to respective
+file in `outputs`. If there are any differences then the test will fail.
+
+Add the `-d` flag to show the differences of failed tests.  Defaults to showing
+differences with `diff` but you can set the tool by doing `-d=toolname`.
+
+Pass the `-C` flag to save the output of the inputs to the appropriate file. This
+will overwrite any existing outputs. Use this when you want to save verified
+test results. Combine with a *test-name-glob* to selectively compile.
+
+You can also run specific tests by passing in an argument that contains any
+part of the test name.
+
+## bootstrap.sh
+
+It's a syntetic test comparing lessc and lessphp output compiling twitter bootstrap;
+see bootstrap.sh for details.
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/bootstrap.sh b/mod/less/vendors/lessphp/tests/bootstrap.sh
new file mode 100755
index 000000000..b49f7cec3
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/bootstrap.sh
@@ -0,0 +1,49 @@
+echo "This script clones twitter bootsrap, compiles it with lessc and lessphp,"
+echo "cleans up results with csstidy, and outputs diff. To run it, you need to"
+echo "have git, csstidy and lessc installed."
+echo ""
+
+csstidy_params="--allow_html_in_templates=false --compress_colors=false
+--compress_font-weight=false --discard_invalid_properties=false
+--lowercase_s=false --preserve_css=true --remove_bslash=false
+--remove_last_;=false --sort-properties=true --sort-selectors=true
+--timestamp=false --silent=true --merge_selectors=0 --case-properties=0
+--optimize-shorthands=0 --template=high"
+
+if [ -z "$@" ]; then
+  diff_tool="diff -b -u -t -B"
+else
+  diff_tool=$@
+fi
+
+mkdir -p tmp
+
+if [ ! -d 'bootstrap/' ]; then
+  echo ">> Cloning bootstrap to bootstrap/"
+  git clone https://github.com/twitter/bootstrap
+fi
+
+echo ">> Lessc compilation"
+lessc bootstrap/less/bootstrap.less tmp/bootstrap.lessc.css
+
+echo ">> Lessphp compilation"
+../plessc bootstrap/less/bootstrap.less tmp/bootstrap.lessphp.css
+echo ">> Cleanup and convert"
+
+# csstidy tmp/bootstrap.lessc.css $csstidy_params tmp/bootstrap.lessc.clean.css
+# csstidy tmp/bootstrap.lessphp.css $csstidy_params tmp/bootstrap.lessphp.clean.css
+#
+# # put a newline after { and :
+# function split() {
+#   sed 's/\(;\|{\)/\1\n/g'
+# }
+#
+# # csstidy is messed up and wont output to stdout when there are a bunch of options
+# cat tmp/bootstrap.lessc.clean.css | split | tee tmp/bootstrap.lessc.clean.css
+# cat tmp/bootstrap.lessphp.clean.css | split | tee tmp/bootstrap.lessphp.clean.css
+
+php sort.php tmp/bootstrap.lessc.css > tmp/bootstrap.lessc.clean.css
+php sort.php tmp/bootstrap.lessphp.css > tmp/bootstrap.lessphp.clean.css
+
+echo ">> Doing diff"
+$diff_tool tmp/bootstrap.lessc.clean.css tmp/bootstrap.lessphp.clean.css
diff --git a/mod/less/vendors/lessphp/tests/inputs/accessors.less.disable b/mod/less/vendors/lessphp/tests/inputs/accessors.less.disable
new file mode 100644
index 000000000..37f5c8e8b
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/accessors.less.disable
@@ -0,0 +1,36 @@
+/* accessors */
+
+#defaults {
+	@width: 960px;
+	@color: black;
+	.something {
+		@space: 10px;
+		@hello {
+			color: green;
+		}
+	}
+}
+
+.article { color: #294366; }
+
+.comment {
+	width: #defaults[@width];
+	color: .article['color']; 
+	padding: #defaults > .something[@space];
+}
+
+.wow {
+	height: .comment['width'];
+	background-color: .comment['color']; 
+	color: #defaults > .something > @hello['color'];
+
+	padding: #defaults > non-existant['padding'];
+	margin: #defaults > .something['non-existant'];
+}
+
+.mix {
+	#defaults;
+	font-size: .something[@space];
+}
+
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/arity.less b/mod/less/vendors/lessphp/tests/inputs/arity.less
new file mode 100644
index 000000000..a3adad612
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/arity.less
@@ -0,0 +1,77 @@
+
+// simple arity
+
+.hello(@a) {
+	color: one;
+}
+
+.hello(@a, @b) {
+	color: two;
+}
+
+.hello(@a, @b, @c) {
+	color: three;
+}
+
+
+.world(@a, @b, @c) {
+	color: three;
+}
+
+.world(@a, @b) {
+	color: two;
+}
+
+.world(@a) {
+	color: one;
+}
+
+.one {
+	.hello(1);
+	.world(1);
+}
+
+.two {
+	.hello(1, 1);
+	.world(1, 1);
+}
+
+.three {
+	.hello(1, 1, 1);
+	.world(1, 1, 1);
+}
+
+
+// arity with default values
+
+.foo(@a, @b: cool) {
+	color: two;
+}
+
+.foo(@a, @b: cool, @c: yeah) {
+	color: three;
+}
+
+
+.baz(@a, @b, @c: yeah) {
+	color: three;
+}
+
+.baz(@a, @b: cool) {
+	color: two;
+}
+
+
+.multi-foo {
+	.foo(1);
+	.foo(1, 1);
+	.foo(1,1,1);
+}
+
+.multi-baz {
+	.baz(1);
+	.baz(1, 1);
+	.baz(1,1,1);
+}
+
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/attributes.less b/mod/less/vendors/lessphp/tests/inputs/attributes.less
new file mode 100644
index 000000000..7ede4fc4e
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/attributes.less
@@ -0,0 +1,41 @@
+* { color: blue; }
+E { color: blue; }
+E[foo] { color: blue; }
+[foo] { color: blue; }
+[foo] .helloWorld { color: blue; }
+[foo].helloWorld { color: blue; }
+E[foo="barbar"] { color: blue; }
+E[foo~="hello#$@%@$#^"] { color: blue; }
+E[foo^="color: green;"] { color: blue; }
+E[foo$="239023"] { color: blue; }
+E[foo*="29302"] { color: blue; }
+E[foo|="239032"] { color: blue; }
+E:root { color: blue; }
+
+E:nth-child(odd) { color: blue; }
+E:nth-child(2n+1) { color: blue; }
+E:nth-child(5) { color: blue; }
+E:nth-last-child(-n+2) { color: blue; }
+E:nth-of-type(2n) { color: blue; }
+E:nth-last-of-type(n) { color: blue; }
+
+E:first-child { color: blue; }
+E:last-child { color: blue; }
+E:first-of-type { color: blue; }
+E:last-of-type { color: blue; }
+E:only-child { color: blue; }
+E:only-of-type { color: blue; }
+E:empty { color: blue; }
+
+E:lang(en) { color: blue; }
+E::first-line { color: blue; }
+E::before { color: blue; }
+
+E#id { color: blue; }
+E:not(:link) { color: blue; }
+
+E F { color: blue; }
+E > F { color: blue; }
+E + F { color: blue; }
+E ~ F { color: blue; }
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/builtins.less b/mod/less/vendors/lessphp/tests/inputs/builtins.less
new file mode 100644
index 000000000..ae2c4ef6e
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/builtins.less
@@ -0,0 +1,36 @@
+// builtin
+
+@something: "hello world";
+@color: #112233;
+@color2: rgba(44,55,66, .6);
+
+body {
+	color: @something;
+
+	@num: 7 / 6;
+	height: @num + 4;
+	height: floor(@num) + 4px;
+	height: ceil(@num) + 4px;
+
+	@num2: 2 / 3;
+	width: @num2;
+	width: round(@num2);
+	width: floor(@num2);
+	width: ceil(@num2);
+	width: round(10px / 3);
+
+	color: rgbahex(@color);
+	color: rgbahex(@color2);
+}
+
+
+format {
+  @r: 32;
+  format: %("rgb(%d, %d, %d)", @r, 128, 64);
+  format-string: %("hello %s", "world");
+  format-multiple: %("hello %s %d", "earth", 2);
+  format-url-encode: %('red is %A', #ff0000);
+  eformat: e(%("rgb(%d, %d, %d)", @r, 128, 64));
+}
+
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/colors.less b/mod/less/vendors/lessphp/tests/inputs/colors.less
new file mode 100644
index 000000000..d407a74f3
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/colors.less
@@ -0,0 +1,122 @@
+
+body {
+	color: hsl(34, 50%, 40%);
+	color: hsla(34, 50%, 40%, 0.3);
+
+	lighten: lighten(#efefef, 10%);
+	lighten: lighten(rgb(23, 53, 231), 22%);
+	lighten: lighten(rgba(212, 103, 88, 0.5), 10%);
+
+	darken: darken(#efefef, 10%);
+	darken: darken(rgb(23, 53, 231), 22%);
+	darken: darken(rgba(23, 53, 231, 0.5), 10%);
+
+	saturate: saturate(#efefef, 10%);
+	saturate: saturate(rgb(23, 53, 231), 22%);
+	saturate: saturate(rgba(23, 53, 231, 0.5), 10%);
+
+	desaturate: desaturate(#efefef, 10%);
+	desaturate: desaturate(rgb(23, 53, 231), 22%);
+	desaturate: desaturate(rgba(23, 53, 231, 0.5), 10%);
+
+	spin: spin(#efefef, 12);
+	spin: spin(rgb(23, 53, 231), 15);
+	spin: spin(rgba(23, 53, 231, 0.5), 19);
+
+	spin: spin(#efefef, -12);
+	spin: spin(rgb(23, 53, 231), -15);
+	spin: spin(rgba(23, 53, 231, 0.5), -19);
+
+	one: fadein(#abcdef, 10%);
+	one: fadeout(#abcdef, -10%);
+
+	two: fadeout(#029f23, 10%);
+	two: fadein(#029f23, -10%);
+
+
+	three: fadein(rgba(1,2,3, 0.5), 10%);
+	three: fadeout(rgba(1,2,3, 0.5), -10%);
+
+	four: fadeout(rgba(1,2,3, 0), 10%);
+	four: fadein(rgba(1,2,3, 0), -10%);
+
+	hue: hue(rgb(34,20,40));
+	sat: saturation(rgb(34,20,40));
+	lit: lightness(rgb(34,20,40));
+
+	@old: #34fa03;
+	@new: hsl(hue(@old), 45%, 90%);
+	what: @new;
+
+	zero: saturate(#123456, -100%);
+	zero: saturate(#123456, 100%);
+	zero: saturate(#000000, 100%);
+	zero: saturate(#ffffff, 100%);
+
+	zero: lighten(#123456, -100%);
+	zero: lighten(#123456, 100%);
+	zero: lighten(#000000, 100%);
+	zero: lighten(#ffffff, 100%);
+
+	zero: spin(#123456, -100);
+	zero: spin(#123456, 100);
+	zero: spin(#000000, 100);
+	zero: spin(#ffffff, 100);
+}
+
+
+alpha {
+	// g: alpha(red);
+	g: alpha(rgba(0,0,0,0));
+	g: alpha(rgb(155,55,0));
+}
+
+fade {
+	f: fade(red, 50%);
+	f: fade(#fff, 20%);
+	f: fade(rgba(34,23,64,0.4), 50%);
+}
+
+@a: rgb(255,255,255);
+@b: rgb(0,0,0);
+
+.mix {
+	color: mix(@a, @b, 50%);
+}
+
+.percent {
+	per: percentage(0.5);
+}
+
+// color keywords
+
+.colorz {
+	color: whitesmoke - 10;
+	color: spin(red, 34);
+}
+
+
+
+// purposfuly whacky to match less.js
+
+@color: #fcf8e3;
+
+body {
+	start: @color;
+	spin: spin(@color, -10); // #fcf4e3
+	chained: darken(spin(@color, -10), 3%); // gives #fbeed5, should be #fbefd5
+	direct: darken(#fcf4e3, 3%); // #fbefd5
+}
+
+// spin around
+pre {
+	@errorBackground: #f2dede;
+	spin: spin(@errorBackground, -10);
+}
+
+dd {
+	@white: #fff;
+	background-color: mix(@white, darken(@white, 10%), 60%);
+}
+
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/compile_on_mixin.less b/mod/less/vendors/lessphp/tests/inputs/compile_on_mixin.less
new file mode 100644
index 000000000..79d628f49
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/compile_on_mixin.less
@@ -0,0 +1,39 @@
+
+@mixin {
+	height: 22px;
+	ul {
+		height: 20px;
+		li {
+			@color: red;
+			height: 10px;
+			div span, link {
+				margin: 10px;
+				color: @color;
+			}
+		}
+
+		div, p {
+			border: 1px;
+			&.hello {
+				color: green;
+			}
+
+			:what {
+				color: blue;
+			}
+		}
+
+
+		a {
+			b {
+				color: blue;
+			}
+		}
+	}
+}
+
+
+
+body {
+	@mixin;
+}
diff --git a/mod/less/vendors/lessphp/tests/inputs/escape.less b/mod/less/vendors/lessphp/tests/inputs/escape.less
new file mode 100644
index 000000000..02d92d6f0
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/escape.less
@@ -0,0 +1,20 @@
+
+body {
+	@hello: "world";
+	border: e("this is simple");
+	border: e(this is simple); // bug in lessjs
+	border: e("this is simple", "cool lad");
+	border: e(1232);
+	border: e(@hello);
+	border: e("one" + 'more'); // no string addition lessjs
+	border: e(); // syntax error lessjs
+
+	line-height: ~"eating rice";
+	line-height: ~"string cheese";
+	line-height: a b c ~"string me" d e f;
+	line-height: ~"string @{hello}";
+}
+
+.class {
+	filter: ~"progid:DXImageTransform.Microsoft.AlphaImageLoader(src='image.png')";
+}
diff --git a/mod/less/vendors/lessphp/tests/inputs/font_family.less b/mod/less/vendors/lessphp/tests/inputs/font_family.less
new file mode 100644
index 000000000..c7186b57b
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/font_family.less
@@ -0,0 +1,28 @@
+
+@font-directory: 'fonts/';
+@some-family: Gentium;
+
+@font-face: maroon; // won't collide with @font-face { } 
+
+@font-face {
+	font-family: Graublau Sans Web;
+	src: url(@{font-directory}GraublauWeb.otf) format("opentype");
+}
+
+@font-face {
+  font-family: @some-family;
+  src: url('@{font-directory}Gentium.ttf');
+}
+ 
+@font-face {
+  font-family: @some-family;
+  src: url("@{font-directory}GentiumItalic.ttf");
+  font-style: italic;
+}
+
+h2 { 
+	font-family: @some-family;
+	crazy: @font-face;
+}
+
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/guards.less b/mod/less/vendors/lessphp/tests/inputs/guards.less
new file mode 100644
index 000000000..20bdf240e
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/guards.less
@@ -0,0 +1,88 @@
+
+.simple(@hi) when (@hi) {
+	color: yellow;
+}
+
+
+.something(@hi) when (@hi = cool) {
+	color: red;
+}
+
+.another(@x) when (@x > 10) {
+	color: green;
+}
+
+
+.flipped(@x) when (@x =< 10) {
+	color: teal;
+}
+
+.yeah(@arg) when (isnumber(@arg)) {
+	color: purple;
+}
+
+
+.yeah(@arg) when (ispixel(@arg)) {
+	color: silver;
+}
+
+
+.hello(@arg) when not (@arg) {
+	color: orange;
+}
+
+dd {
+	.simple(true);
+	.simple(2344px);
+}
+
+b {
+	.something(cool);
+	.something(birthday);
+}
+
+img {
+	.another(12);
+	.another(2);
+
+	.flipped(12);
+	.flipped(2);
+}
+
+body {
+	.yeah("world");
+	.yeah(232px);
+	.yeah(232);
+
+	.hello(true);
+}
+
+.something(@x) when (@x) and (@y), not (@x = what) {
+	color: blue;
+}
+
+div {
+	@y: true;
+	.something(true);
+
+}
+
+pre {
+	.something(what);
+}
+
+
+.coloras(@g) when (iscolor(@g)) {
+	color: true @g;
+}
+
+link {
+	.coloras(red);
+	.coloras(10px);
+	.coloras(ffjref);
+	.coloras(#fff);
+	.coloras(#fffddd);
+	.coloras(rgb(0,0,0));
+	.coloras(rgba(0,0,0, .34));
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/hacks.less b/mod/less/vendors/lessphp/tests/inputs/hacks.less
new file mode 100644
index 000000000..e69b7bf98
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/hacks.less
@@ -0,0 +1,6 @@
+// css hacks
+
+:root .alert-message, :root .btn {
+	border-radius: 0 \0;
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/import.less b/mod/less/vendors/lessphp/tests/inputs/import.less
new file mode 100644
index 000000000..250d1a3f3
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/import.less
@@ -0,0 +1,21 @@
+
+@import 'file1.less'; // file found and imported
+
+@import "something.css" media;
+@import url("something.css") media;
+@import url(something.css) media, screen, print; 
+
+@color: maroon;
+
+@import url(file2); // found and imported
+
+body { 
+	line-height: 10em;
+	@colors;
+}
+
+div {
+	@color: fuchsia;
+	@import "file2";
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/keyframes.less b/mod/less/vendors/lessphp/tests/inputs/keyframes.less
new file mode 100644
index 000000000..e65a38b95
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/keyframes.less
@@ -0,0 +1,52 @@
+@keyframes 'bounce' {
+	from {
+		top: 100px;
+		animation-timing-function: ease-out;
+	}
+
+	25% {
+		top: 50px;
+		animation-timing-function: ease-in;
+	}
+
+	50% {
+		top: 100px;
+		animation-timing-function: ease-out;
+	}
+
+	75% {
+		top: 75px;
+		animation-timing-function: ease-in;
+	}
+
+	to {
+		top: 100px;
+	}
+}
+
+@-webkit-keyframes flowouttoleft {
+	0% { -webkit-transform: translateX(0) scale(1); }
+	60%, 70% { -webkit-transform: translateX(0) scale(.7); }
+	100% { -webkit-transform: translateX(-100%) scale(.7); }
+}
+
+div {
+	animation-name: 'diagonal-slide';
+	animation-duration: 5s;
+	animation-iteration-count: 10;
+}
+
+@keyframes 'diagonal-slide' {
+
+	from {
+		left: 0;
+		top: 0;
+	}
+
+	to {
+		left: 100px;
+		top: 100px;
+	}
+
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/math.less b/mod/less/vendors/lessphp/tests/inputs/math.less
new file mode 100644
index 000000000..3f4af2c7d
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/math.less
@@ -0,0 +1,116 @@
+
+.unary {
+	// all operators are parsable as unary operators, anything
+	// but - throws an error right now though,
+
+	// this gives two numbers
+	sub: 10 -5;
+	// add: 10 +5; // error
+	// div: 10 /5; // error
+	// mul: 10 *5; // error
+}
+
+.spaces {
+	// we can make the parser do math by leaving out the 
+	// space after the first value, or putting spaces on both sides
+
+	sub: 10-5;
+	sub: 10 - 5;
+
+	add: 10+5; 
+	add: 10 + 5; 
+
+	// div: 10/5; // this wont work, read on
+	div: 10 / 5; 
+
+	mul: 10*5; 
+	mul: 10 * 5; 
+}
+
+// these properties have divison not in parenthases
+.supress-division {
+	border-radius: 10px / 10px;
+	border-radius: 10px/10px;
+	border-radius: hello (10px/10px) world;
+	@x: 10px;
+	font: @x/30 sans-serif;
+	font: 10px / 20px sans-serif;
+	font: 10px/20px sans-serif;
+	border-radius:0 15px 15px 15px / 0 50% 50% 50%;
+}
+
+
+.parens {
+	// if you are unsure, then just wrap the expression in parentheses and it will
+	// always evaluate.
+
+	// notice we no longer have unary operators, and these will evaluate
+	sub: (10 -5);
+	add: (10 +5);
+	div: (10 /5);
+	div: (10/5); // no longer interpreted as the shorthand
+	mul: (10 *5);
+}
+
+.keyword-names {
+	// watch out when doing math with keywords, - is a valid keyword character
+	@a: 100;
+	@b: 25;
+	@a-: "hello";
+	height: @a-@b; // here we get "hello" 25, not 75
+}
+
+
+.negation {
+    hello: -(1px);
+    hello: 0-(1px);
+
+	@something: 10;
+	hello: -@something;
+}
+
+
+// and now here are the tests
+
+.test {
+	single: (5);
+	single: 5+(5);
+	single: (5)+((5));
+
+	parens: (5 +(5)) -2;
+	// parens: ((5 +(5)) -2); // FAILS - fixme
+
+	math: (5 + 5)*(2 / 1);
+	math: (5+5)*(2/1);
+
+	width: 2 * (4 * (2 + (1 + 6))) - 1;
+	height: ((2+3)*(2+3) / (9-4)) + 1;
+	padding: (2px + 4px) 1em 2px 2;
+
+	@var: (2 * 2);
+	padding: (2 * @var) 4 4 (@var * 1px);
+	width: (@var * @var) * 6;
+	height: (7 * 7) + (8 * 8);
+	margin: 4 * (5 + 5) / 2 - (@var * 2);
+}
+
+.percents {
+	color: 100 * 10%;
+	color: 10% * 100;
+	color: 10% * 10%;
+
+	color: 100px * 10%; // lessjs makes this px
+	color: 10% * 100px; // lessjs makes this %
+
+	color: 20% + 10%;
+	color: 20% - 10%;
+
+	color: 20% / 10%;
+}
+
+.misc {
+	x: 10px * 4em;
+	y: 10 * 4em;
+
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/media.less b/mod/less/vendors/lessphp/tests/inputs/media.less
new file mode 100644
index 000000000..0e65d942f
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/media.less
@@ -0,0 +1,38 @@
+@media screen, 3D {
+	P { color: green; }
+}
+@media print {
+	body { font-size: 10pt }
+}
+@media screen {
+	body { font-size: 13px }
+}
+@media screen, print {
+	body { line-height: 1.2 }
+}
+
+@media all and (min-width: 0px) {
+	body { line-height: 1.2 }
+}
+
+@media all and (min-width: 0) {
+	body { line-height: 1.2 }
+}
+
+@media
+	screen and (min-width: 102.5em) and (max-width: 117.9375em),
+	screen and (min-width: 150em) {
+    body { color: blue }
+}
+
+
+@media screen and (min-height: 100px + 10px) {
+	body { color: red; }
+}
+
+@cool: 100px;
+
+@media screen and (height: @cool) and (width: @cool + 10), (size: @cool + 20) {
+	body { color: red; }
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/misc.less b/mod/less/vendors/lessphp/tests/inputs/misc.less
new file mode 100644
index 000000000..86bd8f706
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/misc.less
@@ -0,0 +1,84 @@
+
+@hello: "utf-8";
+@charset @hello;
+
+@color: #fff;
+@base_path: "/assets/images/";
+@images: @base_path + "test/"; 
+.topbar { background: url(@{images}topbar.png); }
+.hello { test: empty-function(@images, 40%, to(@color)); }
+
+.css3 {
+	background-image: -webkit-gradient(linear, 0% 0%, 0% 90%, 
+		from(#E9A000), to(#A37000));
+}
+
+
+/**
+
+Here is a block comment
+
+**/
+
+
+// this is a comment
+
+.test, /*hello*/.world {
+	border: 1px solid red; // world
+	/* another property */
+	color: url(http://mage-page.com);
+	string: "hello /* this is not a comment */";
+	world: "// neither is this";
+	string: 'hello /* this is not a comment */' /*what if this is a comment */;
+	world: '// neither is this' // hell world;
+	;
+	what-/*something?*/ever: 100px;
+	background: url(/*no comment here*/);
+}
+
+
+.urls {
+	@var: "http://google.com";
+	background: url(@var);
+	background: url(@{var});
+	background: url("@{var}");
+}
+
+.mix(@arg) { color: @arg; }
+@aaa: aaa;
+@bbb: bbb;
+// make sure the opening selector isn't too greedy
+.cool {.mix("@{aaa}, @{bbb}")}
+.cool();
+
+.cool("{hello");
+.cool('{hello');
+
+
+// merging of mixins
+.span-17 { float: left; }
+.span-17 { width: 660px; }
+
+.x {.span-17;}
+
+.hi {
+	pre {
+		color: red;
+	}
+}
+
+.hi {
+	pre {
+		color: blue;
+	}
+}
+
+.rad {
+	.hi;
+}
+
+
+@page :left { margin-left: 4cm; }
+@page :right { margin-left: 3cm; }
+@page { margin: 2cm }
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/mixin_functions.less b/mod/less/vendors/lessphp/tests/inputs/mixin_functions.less
new file mode 100644
index 000000000..fc9d57901
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/mixin_functions.less
@@ -0,0 +1,40 @@
+
+@outer: 10px;
+@class(@var:22px, @car: 400px + @outer) {
+  margin: @var;
+  height: @car;
+}
+
+@group { 
+  @f(@color) {
+    color: @color;
+  }
+  .cool {
+    border-bottom: 1px solid green;
+  }
+}
+
+.class(@width:200px) {
+  padding: @width;
+}
+
+body {
+  .class(2.0em);
+  @group > @f(red);
+  @class(10px, 10px + 2);
+  @group > .cool;
+}
+
+
+@lots(@a: 10px, @b: 20px, @c: 30px, @d: 40px, @e: 4px, @f:3px, @g:2px, @h: 1px) {
+	padding: @a @b @c @d;
+	margin: @e @f @g @h;
+}
+
+.skip_args {
+	@class(,12px);
+	@lots(,,,88px,,12px);
+	@group > @f(red,,,,);
+	@group > @f(red);
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/mixin_merging.less.disable b/mod/less/vendors/lessphp/tests/inputs/mixin_merging.less.disable
new file mode 100644
index 000000000..6b25e421f
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/mixin_merging.less.disable
@@ -0,0 +1,100 @@
+
+@tester {
+	p, div { height: 10px; }
+}
+
+#test1 {
+	div { color: red; }
+	@tester;
+}
+
+
+@cool {
+	a,b,i { width: 1px; }
+}
+
+#test2 {
+	b { color: red; }
+	@cool;
+}
+
+#test3 {
+	@cool;
+	b { color: red; }
+}
+
+@cooler {
+	a { margin: 1px; }
+}
+
+#test4 {
+	a, div, html { color: blue; }
+	@cooler;
+}
+
+@hi {
+	img, strong { float: right; }
+}
+
+#test5 {
+	img, strong { padding: 2px; }
+	@hi;
+}
+
+@nested {
+	div, span {
+		a {
+			color: red;
+		}
+	}
+}
+
+#test6 {
+	div, span {
+		a {
+			line-height: 10px;
+		}
+	}
+	@nested;
+}
+
+@broken-nesting {
+	div, span {
+		strong, b { 
+			color: red;
+		}
+	}
+
+}
+
+#test7 {
+	div {
+		strong { 
+			margin: 1px;
+		}
+	}
+	@broken-nesting;
+}
+
+
+@another-nest {
+	a,b {
+		i {
+			color: red;
+		}
+
+		s {
+			color: blue;
+		}
+	}
+}
+
+#test8 {
+	a, b {
+		i,s {
+			background: red;
+		}
+	}
+	@another-nest;
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/mixins.less b/mod/less/vendors/lessphp/tests/inputs/mixins.less
new file mode 100644
index 000000000..259db3def
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/mixins.less
@@ -0,0 +1,126 @@
+
+@rounded-corners {
+	border-radius: 10px;
+}
+
+.bold {
+	@font-size: 20px;
+	font-size: @font-size;
+	font-weight: bold;
+}
+
+body #window {
+	@rounded-corners;
+	.bold;
+	line-height: @font-size * 1.5;
+}
+
+#bundle {
+  .button {
+    display: block;
+    border: 1px solid black;
+    background-color: grey;
+    &:hover { background-color: white }
+  }
+}
+#header a {
+  color: orange;
+  #bundle > .button; // mixin the button class
+}
+
+div {
+	@abstract {
+		hello: world;
+		b {
+			color: blue;
+		}
+	}
+
+	@abstract > b;
+	@abstract;
+}
+
+@poop {
+	big: baby;
+}
+
+body {
+	div;
+}
+
+// not using > to list mixins
+
+.hello {
+  .world {
+    color: blue;
+  }
+}
+
+.foobar {
+  .hello .world;
+}
+
+
+.butter {
+	.this .one .isnt .found;
+}
+
+
+// arguments
+
+.spam(@something: 100, @dad: land) {
+	@wow: 23434;
+    foo: @arguments;
+    bar: @arguments;
+}
+
+.eggs {
+    .spam(1px, 2px);
+    .spam();
+}
+
+.first(@one, @two, @three, @four: cool) {
+	cool: @arguments;
+}
+
+#hello {
+	.first(one, two, three);
+}
+
+#hello-important {
+	.first(one, two, three) !important;	
+}
+
+.rad(@name) {
+	cool: @arguments;
+}
+
+#world {
+	@hello: "world";
+	.rad("@{hello}");
+}
+
+.second(@x, @y:skip, @z: me) {
+	things: @arguments;
+}
+
+#another {
+	.second(red, blue, green);
+	.second(red blue green);
+}
+
+
+.another(@x, @y:skip, @z:me) {
+  .cool {
+    color: @arguments;
+  }
+}
+
+#day {
+	.another(one,two, three);
+	.another(one two three);
+}
+
+
+
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/nested.less b/mod/less/vendors/lessphp/tests/inputs/nested.less
new file mode 100644
index 000000000..0b62ea19b
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/nested.less
@@ -0,0 +1,60 @@
+#header {
+  color: black;
+
+  .navigation {
+    font-size: 12px;
+	.border {
+		.outside {
+			color: blue;
+		}
+	}
+  }
+  .logo {
+    width: 300px;
+    &:hover { text-decoration: none }
+  }
+}
+
+a { b { ul { li { color: green; } } } }
+
+this { will { not { show { } } } }
+
+.cool {
+  div & { color: green; }
+  p & span { color: yellow; }
+}
+
+another {
+ .cool;
+}
+
+b {
+  & .something {
+    color: blue;
+  }
+
+  &.something {
+    color: blue;
+  }
+}
+
+.foo {
+  .bar, .baz {
+    & .qux {
+      display: block;
+    }
+    .qux & {
+      display: inline;
+    }
+    .qux & .biz {
+      display: none;
+    }
+  }
+}
+
+b {
+	hello [x="&yeah"] {
+		color: red;
+	}
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/pattern_matching.less b/mod/less/vendors/lessphp/tests/inputs/pattern_matching.less
new file mode 100644
index 000000000..e875473d3
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/pattern_matching.less
@@ -0,0 +1,167 @@
+
+.demo (light, @color) {
+  color: lighten(@color, 10%);
+}
+.demo (@_, @color) {
+  display: block;
+}
+
+@switch: light;
+
+.class {
+  .demo(@switch, #888);
+}
+
+// by arity
+
+.mixin () {
+    zero: 0;
+}
+.mixin (@a: 1px) {
+    one: 1;
+}
+.mixin (@a) {
+    one-req: 1;
+}
+.mixin (@a: 1px, @b: 2px) {
+    two: 2;
+}
+
+.mixin (@a, @b, @c) {
+    three-req: 3;
+}
+
+.mixin (@a: 1px, @b: 2px, @c: 3px) {
+    three: 3;
+}
+
+.zero {
+    .mixin();
+}
+
+.one {
+    .mixin(1);
+}
+
+.two {
+    .mixin(1, 2);
+}
+
+.three {
+    .mixin(1, 2, 3);
+}
+
+//
+
+.mixout ('left') {
+    left: 1;
+}
+
+.mixout ('right') {
+    right: 1;
+}
+
+.left {
+    .mixout('left');
+}
+.right {
+    .mixout('right');
+}
+
+//
+
+.border (@side, @width) {
+    color: black;
+    .border-side(@side, @width);
+}
+.border-side (left, @w) {
+    border-left: @w;
+}
+.border-side (right, @w) {
+    border-right: @w;
+}
+
+.border-right {
+    .border(right, 4px);
+}
+.border-left {
+    .border(left, 4px);
+}
+
+//
+
+
+.border-radius (@r) {
+    both: @r * 10;
+}
+.border-radius (@r, left) {
+    left: @r;
+}
+.border-radius (@r, right) {
+    right: @r;
+}
+
+.only-right {
+    .border-radius(33, right);
+}
+.only-left {
+    .border-radius(33, left);
+}
+.left-right {
+    .border-radius(33);
+}
+
+.hola(hello, @hello...) {
+	color: blue;
+}
+
+#hola {
+	.hola(hello, world);
+	.hola(jello, world);
+}
+
+.resty(@hello, @world, @the_rest...) {
+	padding: @hello @world;
+	rest: @the_rest;
+}
+
+#nnn {
+	.body(10, 10, 10, 10, 10);
+	.body(10, 10, 10);
+	.body(10, 10);
+	.body(10);
+	.body();
+}
+
+.defaults(@aa, @bb:e343, @cc: "heah", ...) {
+	height: @aa;
+}
+
+#defaults_1 {
+	.defaults();
+	.defaults(one);
+	.defaults(two, one);
+	.defaults(three, two, one);
+	.defaults(four, three, two, one);
+}
+
+
+.thing() { color: green; }
+.thing(...) { color: blue; }
+.thing { color: red; }
+
+#aa {
+	.thing();
+}
+
+#bb {
+	.thing;
+}
+
+
+#cc {
+	.thing(1);
+}
+
+
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/scopes.less b/mod/less/vendors/lessphp/tests/inputs/scopes.less
new file mode 100644
index 000000000..0ddbfac20
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/scopes.less
@@ -0,0 +1,40 @@
+
+
+@a: 10;
+@some {
+	@b: @a + 10;
+	div {
+		@c: @b + 10;
+		other {
+			@d: @c + 10;
+			world {
+				@e: @d + 10;
+				height: @e;
+			}
+		}
+	}
+}
+
+
+body {
+	@some;
+}
+
+@some;
+
+.test(@x: 10) {
+	height: @x;	
+	.test(@y: 11) {
+		height: @y;	
+		.test(@z: 12) {
+			height: @z;	
+		}
+		.test;
+	}
+	.test;
+}
+
+pre {
+	.test;
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/selector_expressions.less b/mod/less/vendors/lessphp/tests/inputs/selector_expressions.less
new file mode 100644
index 000000000..a16c1d23a
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/selector_expressions.less
@@ -0,0 +1,29 @@
+
+@color: blue;
+
+(~"something @{color}"), world {
+	color: blue;
+}
+
+.div {
+	@color: red;
+	(3434) {
+		height: 100px;
+	}
+
+	(~"cool @{color}") {
+		height: 4000px;
+	}
+}
+
+.heck(@a) { color: @a+10 }
+
+.spanX (@index) when (@index > 0) {
+	(~".span@{index}") { .heck(@index) }
+	.spanX(@index - 1);
+}
+.spanX (0) {}
+
+.spanX (5);
+
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/site_demos.less b/mod/less/vendors/lessphp/tests/inputs/site_demos.less
new file mode 100644
index 000000000..136a99ac8
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/site_demos.less
@@ -0,0 +1,120 @@
+// these are the demos from the lessphp homepage
+
+default {
+	@base: 24px;
+	@border-color: #B2B;
+
+	.underline { border-bottom: 1px solid green }
+
+	#header {
+	  color: black;
+	  border: 1px solid @border-color + #222222;
+
+	  .navigation {
+		font-size: @base / 2;
+		a {
+		.underline;
+		}
+	  }
+	  .logo {
+		width: 300px;
+		&:hover { text-decoration: none }
+	  }
+	}
+}
+
+variables {
+	@a: 2;
+	@x: @a * @a;
+	@y: @x + 1;
+	@z: @x * 2 + @y;
+	 
+	@nice-blue: #5B83AD;
+	@light-blue: @nice-blue + #111;
+	 
+	@b: @a * 10;
+	@c: #888;
+	@fonts: "Trebuchet MS", Verdana, sans-serif;
+	 
+	.variables {
+	  width: @z + 1cm; // 14cm
+	  height: @b + @x + 0px; // 24px
+	  color: @c;
+	  background: @light-blue;
+	  font-family: @fonts;
+	}
+}
+
+mixins {
+	.bordered {
+	  border-top: dotted 1px black;
+	  border-bottom: solid 2px black;
+	}
+	#menu a {
+	  color: #111;
+	  .bordered;
+	}
+
+	.post a {
+	  color: red;
+	  .bordered;
+	}
+}
+
+nested-rules {
+	#header {
+	  color: black;
+
+	  .navigation {
+		font-size: 12px;
+	  }
+	  .logo {
+		width: 300px;
+		&:hover { text-decoration: none }
+	  }
+	}
+}
+
+namespaces {
+	#bundle {
+	  .button {
+		display: block;
+		border: 1px solid black;
+		background-color: grey;
+		&:hover { background-color: white }
+	  }
+	}
+	#header a {
+	  color: orange;
+	  #bundle > .button; // mixin the button class
+	}	
+}
+
+mixin-functions {
+	@outer: 10px;
+	@class(@var:22px, @car: 400px + @outer) {
+	  margin: @var;
+	  height: @car;
+	}
+
+	@group { 
+	  @f(@color) {
+		color: @color;
+	  }
+	  .cool {
+		border-bottom: 1px solid green;
+	  }
+	}
+
+	.class(@width:200px) {
+	  padding: @width;
+	}
+
+	body {
+	  .class(2.0em);
+	  @group > @f(red);
+	  @class(10px, 10px + 2);
+	  @group > .cool;
+	}
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/test-imports/file1.less b/mod/less/vendors/lessphp/tests/inputs/test-imports/file1.less
new file mode 100644
index 000000000..658de0c53
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/test-imports/file1.less
@@ -0,0 +1,16 @@
+
+
+/**
+ * This is a test import file
+ */
+
+@colors {
+	div.bright {
+		color: red;
+	}
+
+	div.sad {
+		color: blue;
+	}
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/test-imports/file2.less b/mod/less/vendors/lessphp/tests/inputs/test-imports/file2.less
new file mode 100644
index 000000000..2cae8dce0
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/test-imports/file2.less
@@ -0,0 +1,6 @@
+
+b {
+	color: @color;
+	padding: 16px;
+}
+
diff --git a/mod/less/vendors/lessphp/tests/inputs/variables.less b/mod/less/vendors/lessphp/tests/inputs/variables.less
new file mode 100644
index 000000000..6c4ef8fb4
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/inputs/variables.less
@@ -0,0 +1,45 @@
+@a: 2;
+@x: @a * @a;
+@y: @x + 1;
+@z: @y + @x * 2;
+@m: @z % @y;
+ 
+@nice-blue: #5B83AD;
+@light-blue: @nice-blue + #111;
+
+@rgb-color: rgb(20%, 15%, 80%);
+@rgba-color: rgba(23,68,149,0.5);
+ 
+@b: @a * 10px;
+@c: #888;
+@fonts: "Trebuchet MS", Verdana, sans-serif;
+ 
+.variables {
+  width: @z + 1cm; // 14cm
+  height: @b + @x + 0px; // 24px
+  margin-top: -@b; // -20px
+  margin-bottom: 10 - -@b; // 30px
+  @d: @c + #001;
+  color: @d;
+  background: @light-blue;
+  font-family: @fonts;
+  margin: @m + 0px; // 3px
+  font: 10px/12px serif;
+  font: 120%/120% serif;
+}
+
+.external {
+  color: @c;
+  border: 1px solid @rgb-color;
+  background: @rgba-color;
+  padding: @nonexistant + 4px;
+}
+
+@hello: 44px;
+@something: "hello";
+@cool: something;
+
+color: @@something;
+color: @@@cool;
+
+
diff --git a/mod/less/vendors/lessphp/tests/outputs/accessors.css b/mod/less/vendors/lessphp/tests/outputs/accessors.css
new file mode 100644
index 000000000..e6c01a72c
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/accessors.css
@@ -0,0 +1,14 @@
+.article { color:#294366; }
+.comment {
+  width:960px;
+  color:#294366;
+  padding:10px;
+}
+.wow {
+  height:960px;
+  background-color:#294366;
+  color:green;
+  padding:;
+  margin:;
+}
+.mix { font-size:10px; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/arity.css b/mod/less/vendors/lessphp/tests/outputs/arity.css
new file mode 100644
index 000000000..7900e4087
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/arity.css
@@ -0,0 +1,25 @@
+.one {
+  color:one;
+  color:one;
+}
+.two {
+  color:two;
+  color:two;
+}
+.three {
+  color:three;
+  color:three;
+}
+.multi-foo {
+  color:two;
+  color:three;
+  color:two;
+  color:three;
+  color:three;
+}
+.multi-baz {
+  color:two;
+  color:three;
+  color:two;
+  color:three;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/attributes.css b/mod/less/vendors/lessphp/tests/outputs/attributes.css
new file mode 100644
index 000000000..229f7cf36
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/attributes.css
@@ -0,0 +1,35 @@
+* { color:blue; }
+E { color:blue; }
+E[foo] { color:blue; }
+[foo] { color:blue; }
+[foo] .helloWorld { color:blue; }
+[foo].helloWorld { color:blue; }
+E[foo="barbar"] { color:blue; }
+E[foo~="hello#$@%@$#^"] { color:blue; }
+E[foo^="color: green;"] { color:blue; }
+E[foo$="239023"] { color:blue; }
+E[foo*="29302"] { color:blue; }
+E[foo|="239032"] { color:blue; }
+E:root { color:blue; }
+E:nth-child(odd) { color:blue; }
+E:nth-child(2n+1) { color:blue; }
+E:nth-child(5) { color:blue; }
+E:nth-last-child(-n+2) { color:blue; }
+E:nth-of-type(2n) { color:blue; }
+E:nth-last-of-type(n) { color:blue; }
+E:first-child { color:blue; }
+E:last-child { color:blue; }
+E:first-of-type { color:blue; }
+E:last-of-type { color:blue; }
+E:only-child { color:blue; }
+E:only-of-type { color:blue; }
+E:empty { color:blue; }
+E:lang(en) { color:blue; }
+E::first-line { color:blue; }
+E::before { color:blue; }
+E#id { color:blue; }
+E:not(:link) { color:blue; }
+E F { color:blue; }
+E > F { color:blue; }
+E + F { color:blue; }
+E ~ F { color:blue; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/builtins.css b/mod/less/vendors/lessphp/tests/outputs/builtins.css
new file mode 100644
index 000000000..1787e0ba3
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/builtins.css
@@ -0,0 +1,20 @@
+body {
+  color:"hello world";
+  height:5.1666666666667;
+  height:5px;
+  height:6px;
+  width:0.66666666666667;
+  width:1;
+  width:0;
+  width:1;
+  width:3px;
+  color:#00112233;
+  color:#992c3742;
+}
+format {
+  format:"rgb(32, 128, 64)";
+  format-string:"hello world";
+  format-multiple:"hello earth 2";
+  format-url-encode:'red is %A';
+  eformat:rgb(32, 128, 64);
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/colors.css b/mod/less/vendors/lessphp/tests/outputs/colors.css
new file mode 100644
index 000000000..51eb152b5
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/colors.css
@@ -0,0 +1,69 @@
+body {
+  color:#996d33;
+  color:rgba(153,109,51,0.3);
+  lighten:#fff;
+  lighten:#7c8df2;
+  lighten:rgba(222,140,129,0.5);
+  darken:#d6d6d6;
+  darken:#0d1e81;
+  darken:rgba(18,42,185,0.5);
+  saturate:#f1eded;
+  saturate:#0025fe;
+  saturate:rgba(10,44,244,0.5);
+  desaturate:#efefef;
+  desaturate:#3349cb;
+  desaturate:rgba(36,62,218,0.5);
+  spin:#efefef;
+  spin:#2d17e7;
+  spin:rgba(59,23,231,0.5);
+  spin:#efefef;
+  spin:#1769e7;
+  spin:rgba(23,119,231,0.5);
+  one:#abcdef;
+  one:#abcdef;
+  two:rgba(2,159,35,0.9);
+  two:rgba(2,159,35,0.9);
+  three:rgba(1,2,3,0.6);
+  three:rgba(1,2,3,0.6);
+  four:rgba(1,2,3,0);
+  four:rgba(1,2,3,0);
+  hue:282;
+  sat:33;
+  lit:12;
+  what:#dff1da;
+  zero:#343434;
+  zero:#003468;
+  zero:#000;
+  zero:#fff;
+  zero:#000;
+  zero:#fff;
+  zero:#fff;
+  zero:#fff;
+  zero:#1d5612;
+  zero:#56124b;
+  zero:#000;
+  zero:#fff;
+}
+alpha {
+  g:0;
+  g:1;
+}
+fade {
+  f:rgba(255,0,0,0.5);
+  f:rgba(255,255,255,0.2);
+  f:rgba(34,23,64,0.5);
+}
+.mix { color:#808080; }
+.percent { per:50%; }
+.colorz {
+  color:#ebebeb;
+  color:#ff9100;
+}
+body {
+  start:#fcf8e3;
+  spin:#fcf4e3;
+  chained:#fbeed5;
+  direct:#fbefd5;
+}
+pre { spin:#f2dee1; }
+dd { background-color:#f5f5f5; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/compile_on_mixin.css b/mod/less/vendors/lessphp/tests/outputs/compile_on_mixin.css
new file mode 100644
index 000000000..b1a3d7fcc
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/compile_on_mixin.css
@@ -0,0 +1,11 @@
+body { height:22px; }
+body ul { height:20px; }
+body ul li { height:10px; }
+body ul li div span, body ul li link {
+  margin:10px;
+  color:red;
+}
+body ul div, body ul p { border:1px; }
+body ul div.hello, body ul p.hello { color:green; }
+body ul div :what, body ul p :what { color:blue; }
+body ul a b { color:blue; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/escape.css b/mod/less/vendors/lessphp/tests/outputs/escape.css
new file mode 100644
index 000000000..a310fe009
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/escape.css
@@ -0,0 +1,14 @@
+body {
+  border:this is simple;
+  border:this;
+  border:this is simple;
+  border:1232;
+  border:world;
+  border:onemore;
+  border:;
+  line-height:eating rice;
+  line-height:string cheese;
+  line-height:a b c string me d e f;
+  line-height:string world;
+}
+.class { filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='image.png'); }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/font_family.css b/mod/less/vendors/lessphp/tests/outputs/font_family.css
new file mode 100644
index 000000000..afbc996d3
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/font_family.css
@@ -0,0 +1,17 @@
+@font-face {
+  font-family:Graublau Sans Web;
+  src:url(fonts/GraublauWeb.otf) format("opentype");
+}
+@font-face {
+  font-family:Gentium;
+  src:url('fonts/Gentium.ttf');
+}
+@font-face {
+  font-family:Gentium;
+  src:url("fonts/GentiumItalic.ttf");
+  font-style:italic;
+}
+h2 {
+  font-family:Gentium;
+  crazy:maroon;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/guards.css b/mod/less/vendors/lessphp/tests/outputs/guards.css
new file mode 100644
index 000000000..db110aa9d
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/guards.css
@@ -0,0 +1,23 @@
+dd { color:yellow; }
+b {
+  color:red;
+  color:blue;
+  color:blue;
+}
+img {
+  color:green;
+  color:teal;
+}
+body {
+  color:purple;
+  color:silver;
+  color:purple;
+}
+div { color:blue; }
+link {
+  color:true red;
+  color:true #fff;
+  color:true #fffddd;
+  color:true #000;
+  color:true rgba(0,0,0,0.34);
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/hacks.css b/mod/less/vendors/lessphp/tests/outputs/hacks.css
new file mode 100644
index 000000000..984faa6e5
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/hacks.css
@@ -0,0 +1 @@
+:root .alert-message, :root .btn { border-radius:0 \0; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/import.css b/mod/less/vendors/lessphp/tests/outputs/import.css
new file mode 100644
index 000000000..4d50ba598
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/import.css
@@ -0,0 +1,14 @@
+@import url("something.css") media;
+@import url("something.css") media;
+@import url("something.css") media, screen, print;
+b {
+  color:maroon;
+  padding:16px;
+}
+body { line-height:10em; }
+body div.bright { color:red; }
+body div.sad { color:blue; }
+div b {
+  color:fuchsia;
+  padding:16px;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/keyframes.css b/mod/less/vendors/lessphp/tests/outputs/keyframes.css
new file mode 100644
index 000000000..d01f05b77
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/keyframes.css
@@ -0,0 +1,47 @@
+@keyframes 'bounce' {
+  from {
+    top:100px;
+    animation-timing-function:ease-out;
+  }
+  25% {
+    top:50px;
+    animation-timing-function:ease-in;
+  }
+  50% {
+    top:100px;
+    animation-timing-function:ease-out;
+  }
+  75% {
+    top:75px;
+    animation-timing-function:ease-in;
+  }
+  to {
+    top:100px;
+  }
+}
+@-webkit-keyframes flowouttoleft {
+  0% {
+    -webkit-transform:translateX(0) scale(1);
+  }
+  60%, 70% {
+    -webkit-transform:translateX(0) scale(.7);
+  }
+  100% {
+    -webkit-transform:translateX(-100%) scale(.7);
+  }
+}
+div {
+  animation-name:'diagonal-slide';
+  animation-duration:5s;
+  animation-iteration-count:10;
+}
+@keyframes 'diagonal-slide' {
+  from {
+    left:0;
+    top:0;
+  }
+  to {
+    left:100px;
+    top:100px;
+  }
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/math.css b/mod/less/vendors/lessphp/tests/outputs/math.css
new file mode 100644
index 000000000..bcd66839e
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/math.css
@@ -0,0 +1,61 @@
+.unary { sub:10 -5; }
+.spaces {
+  sub:5;
+  sub:5;
+  add:15;
+  add:15;
+  div:2;
+  mul:50;
+  mul:50;
+}
+.supress-division {
+  border-radius:10px/10px;
+  border-radius:10px/10px;
+  border-radius:hello(10px/10px) world;
+  font:10px/30 sans-serif;
+  font:10px/20px sans-serif;
+  font:10px/20px sans-serif;
+  border-radius:0 15px 15px 15px/0 50% 50% 50%;
+}
+.parens {
+  sub:5;
+  add:15;
+  div:2;
+  div:2;
+  mul:50;
+}
+.keyword-names { height:"hello" 25; }
+.negation {
+  hello:-1px;
+  hello:-1px;
+  hello:-10;
+}
+.test {
+  single:5;
+  single:10;
+  single:10;
+  parens:10 -2;
+  math:20;
+  math:20;
+  width:71;
+  height:6;
+  padding:6px 1em 2px 2;
+  padding:8 4 4 4px;
+  width:96;
+  height:113;
+  margin:12;
+}
+.percents {
+  color:1000%;
+  color:1000%;
+  color:100%;
+  color:1000px;
+  color:1000%;
+  color:30%;
+  color:10%;
+  color:2%;
+}
+.misc {
+  x:40px;
+  y:40em;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/media.css b/mod/less/vendors/lessphp/tests/outputs/media.css
new file mode 100644
index 000000000..cb5683fd4
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/media.css
@@ -0,0 +1,28 @@
+@media screen, 3D {
+  P { color:green; }
+}
+@media print {
+  body { font-size:10pt; }
+}
+@media screen {
+  body { font-size:13px; }
+}
+@media screen, print {
+  body { line-height:1.2; }
+}
+@media all and (min-width: 0px) {
+  body { line-height:1.2; }
+}
+@media all and (min-width: 0) {
+  body { line-height:1.2; }
+}
+@media screen and (min-width: 102.5em) and (max-width: 117.9375em),
+	screen and (min-width: 150em) {
+  body { color:blue; }
+}
+@media screen and (min-height: 110px) {
+  body { color:red; }
+}
+@media screen and (height: 100px) and (width: 110px), (size: 120px) {
+  body { color:red; }
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/misc.css b/mod/less/vendors/lessphp/tests/outputs/misc.css
new file mode 100644
index 000000000..8d85268c8
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/misc.css
@@ -0,0 +1,40 @@
+@charset "utf-8";
+color:"aaa, bbb";
+.topbar { background:url(/assets/images/test/topbar.png); }
+.hello { test:empty-function("/assets/images/test/",40%,to(#fff)); }
+.css3 { background-image:-webkit-gradient(linear,0% 0%,0% 90%,from(#e9a000),to(#a37000)); }
+.test, .world {
+  border:1px solid red;
+  color:url(http://mage-page.com);
+  string:"hello /* this is not a comment */";
+  world:"// neither is this";
+  string:'hello /* this is not a comment */';
+  world:'// neither is this';
+  what-ever:100px;
+  background:url(/*no comment here*/);
+}
+.urls {
+  background:url("http://google.com");
+  background:url(http://google.com);
+  background:url("http://google.com");
+}
+.cool { color:"aaa, bbb"; }
+.span-17 { float:left; }
+.span-17 { width:660px; }
+.x {
+  float:left;
+  width:660px;
+}
+.hi pre { color:red; }
+.hi pre { color:blue; }
+.rad pre { color:red; }
+.rad pre { color:blue; }
+@page :left {
+  margin-left:4cm;
+}
+@page :right {
+  margin-left:3cm;
+}
+@page {
+  margin:2cm;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/mixin_functions.css b/mod/less/vendors/lessphp/tests/outputs/mixin_functions.css
new file mode 100644
index 000000000..91b61492e
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/mixin_functions.css
@@ -0,0 +1,14 @@
+body {
+  padding:2.0em;
+  color:red;
+  margin:10px;
+  height:12px;
+  border-bottom:1px solid green;
+}
+.skip_args {
+  margin:22px;
+  height:12px;
+  padding:10px 20px 30px 88px;
+  margin:4px 12px 2px 1px;
+  color:red;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/mixin_merging.css b/mod/less/vendors/lessphp/tests/outputs/mixin_merging.css
new file mode 100644
index 000000000..9ec360c21
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/mixin_merging.css
@@ -0,0 +1,42 @@
+#test1 div {
+  color:red;
+  height:10px;
+}
+#test1 p { height:10px; }
+#test2 b {
+  color:red;
+  width:1px;
+}
+#test2 a, #test2 i { width:1px; }
+#test3 a, #test3 i { width:1px; }
+#test3 b {
+  width:1px;
+  color:red;
+}
+#test4 a {
+  color:blue;
+  margin:1px;
+}
+#test4 div, #test4 html { color:blue; }
+#test5 img, #test5 strong {
+  padding:2px;
+  float:right;
+}
+#test6 div a, #test6 span a {
+  line-height:10px;
+  color:red;
+}
+#test7 div strong {
+  margin:1px;
+  color:red;
+}
+#test7 div b { color:red; }
+#test7 span strong, #test7 span b { color:red; }
+#test8 a i, #test8 b i {
+  background:red;
+  color:red;
+}
+#test8 a s, #test8 b s {
+  background:red;
+  color:blue;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/mixins.css b/mod/less/vendors/lessphp/tests/outputs/mixins.css
new file mode 100644
index 000000000..70a99003d
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/mixins.css
@@ -0,0 +1,50 @@
+.bold {
+  font-size:20px;
+  font-weight:bold;
+}
+body #window {
+  line-height:0;
+  border-radius:10px;
+  font-size:20px;
+  font-weight:bold;
+}
+#bundle .button {
+  display:block;
+  border:1px solid black;
+  background-color:grey;
+}
+#bundle .button:hover { background-color:white; }
+#header a {
+  color:orange;
+  display:block;
+  border:1px solid black;
+  background-color:grey;
+}
+#header a:hover { background-color:white; }
+div {
+  color:blue;
+  hello:world;
+}
+div b { color:blue; }
+body {
+  color:blue;
+  hello:world;
+}
+body b { color:blue; }
+.hello .world { color:blue; }
+.foobar { color:blue; }
+.eggs {
+  foo:1px 2px;
+  bar:1px 2px;
+  foo:100 land;
+  bar:100 land;
+}
+#hello { cool:one two three cool; }
+#hello-important { cool:one two three cool !important; }
+#world { cool:"world"; }
+#another {
+  things:red blue green;
+  things:red blue green skip me;
+}
+#day .cool { color:one two three; }
+#day .cool { color:one two three skip me; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/nested.css b/mod/less/vendors/lessphp/tests/outputs/nested.css
new file mode 100644
index 000000000..0845fb6ff
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/nested.css
@@ -0,0 +1,16 @@
+#header { color:black; }
+#header .navigation { font-size:12px; }
+#header .navigation .border .outside { color:blue; }
+#header .logo { width:300px; }
+#header .logo:hover { text-decoration:none; }
+a b ul li { color:green; }
+div .cool { color:green; }
+p .cool span { color:yellow; }
+div another { color:green; }
+p another span { color:yellow; }
+b .something { color:blue; }
+b.something { color:blue; }
+.foo .bar .qux, .foo .baz .qux { display:block; }
+.qux .foo .bar, .qux .foo .baz { display:inline; }
+.qux .foo .bar .biz, .qux .foo .baz .biz { display:none; }
+b hello [x="&yeah"] { color:red; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/nesting.css b/mod/less/vendors/lessphp/tests/outputs/nesting.css
new file mode 100644
index 000000000..908c1d814
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/nesting.css
@@ -0,0 +1,6 @@
+#header .navigation .border .outside { color:blue; }
+#header .navigation { font-size:12px; }
+#header .logo:hover { text-decoration:none; }
+#header .logo { width:300px; }
+#header { color:black; }
+a b ul li { color:green; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/pattern_matching.css b/mod/less/vendors/lessphp/tests/outputs/pattern_matching.css
new file mode 100644
index 000000000..f83ace15f
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/pattern_matching.css
@@ -0,0 +1,56 @@
+.class {
+  color:#a2a2a2;
+  display:block;
+}
+.zero {
+  zero:0;
+  one:1;
+  two:2;
+  three:3;
+}
+.one {
+  one:1;
+  one-req:1;
+  two:2;
+  three:3;
+}
+.two {
+  two:2;
+  three:3;
+}
+.three {
+  three-req:3;
+  three:3;
+}
+.left { left:1; }
+.right { right:1; }
+.border-right {
+  color:black;
+  border-right:4px;
+}
+.border-left {
+  color:black;
+  border-left:4px;
+}
+.only-right { right:33; }
+.only-left { left:33; }
+.left-right { both:330; }
+#hola { color:blue; }
+#defaults_1 {
+  height:one;
+  height:two;
+  height:three;
+  height:four;
+}
+.thing { color:red; }
+#aa {
+  color:green;
+  color:blue;
+  color:red;
+}
+#bb {
+  color:green;
+  color:blue;
+  color:red;
+}
+#cc { color:blue; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/scopes.css b/mod/less/vendors/lessphp/tests/outputs/scopes.css
new file mode 100644
index 000000000..23d1551ca
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/scopes.css
@@ -0,0 +1,7 @@
+body div other world { height:50; }
+div other world { height:50; }
+pre {
+  height:10;
+  height:11;
+  height:12;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/selector_expressions.css b/mod/less/vendors/lessphp/tests/outputs/selector_expressions.css
new file mode 100644
index 000000000..78dc4bb92
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/selector_expressions.css
@@ -0,0 +1,8 @@
+something blue, world { color:blue; }
+.div 3434 { height:100px; }
+.div cool red { height:4000px; }
+.span5 { color:15; }
+.span4 { color:14; }
+.span3 { color:13; }
+.span2 { color:12; }
+.span1 { color:11; }
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/site_demos.css b/mod/less/vendors/lessphp/tests/outputs/site_demos.css
new file mode 100644
index 000000000..2c853af4c
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/site_demos.css
@@ -0,0 +1,54 @@
+default .underline { border-bottom:1px solid green; }
+default #header {
+  color:black;
+  border:1px solid #d4d;
+}
+default #header .navigation { font-size:12px; }
+default #header .navigation a { border-bottom:1px solid green; }
+default #header .logo { width:300px; }
+default #header .logo:hover { text-decoration:none; }
+variables .variables {
+  width:14cm;
+  height:24px;
+  color:#888;
+  background:#6c94be;
+  font-family:"Trebuchet MS", Verdana, sans-serif;
+}
+mixins .bordered {
+  border-top:dotted 1px black;
+  border-bottom:solid 2px black;
+}
+mixins #menu a {
+  color:#111;
+  border-top:dotted 1px black;
+  border-bottom:solid 2px black;
+}
+mixins .post a {
+  color:red;
+  border-top:dotted 1px black;
+  border-bottom:solid 2px black;
+}
+nested-rules #header { color:black; }
+nested-rules #header .navigation { font-size:12px; }
+nested-rules #header .logo { width:300px; }
+nested-rules #header .logo:hover { text-decoration:none; }
+namespaces #bundle .button {
+  display:block;
+  border:1px solid black;
+  background-color:grey;
+}
+namespaces #bundle .button:hover { background-color:white; }
+namespaces #header a {
+  color:orange;
+  display:block;
+  border:1px solid black;
+  background-color:grey;
+}
+namespaces #header a:hover { background-color:white; }
+mixin-functions body {
+  padding:2.0em;
+  color:red;
+  margin:10px;
+  height:12px;
+  border-bottom:1px solid green;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/outputs/variables.css b/mod/less/vendors/lessphp/tests/outputs/variables.css
new file mode 100644
index 000000000..4c7e5e669
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/outputs/variables.css
@@ -0,0 +1,20 @@
+color:44px;
+color:44px;
+.variables {
+  width:14cm;
+  height:24px;
+  margin-top:-20px;
+  margin-bottom:30px;
+  color:#889;
+  background:#6c94be;
+  font-family:"Trebuchet MS", Verdana, sans-serif;
+  margin:3px;
+  font:10px/12px serif;
+  font:120%/120% serif;
+}
+.external {
+  color:#888;
+  border:1px solid #3326cc;
+  background:rgba(23,68,149,0.5);
+  padding:4px;
+}
\ No newline at end of file
diff --git a/mod/less/vendors/lessphp/tests/sort.php b/mod/less/vendors/lessphp/tests/sort.php
new file mode 100644
index 000000000..38662cb24
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/sort.php
@@ -0,0 +1,57 @@
+<?php
+error_reporting(E_ALL);
+
+require realpath(dirname(__FILE__)).'/../lessc.inc.php';
+
+// sorts the selectors in stylesheet in order to normalize it for comparison
+
+$exe = array_shift($argv); // remove filename
+
+if (!$fname = array_shift($argv)) {
+	$fname = "php://stdin";
+}
+
+// also sorts the tags in the block
+function sort_key($block) {
+	if (!isset($block->sort_key)) {
+		sort($block->tags, SORT_STRING);
+		$block->sort_key = implode(",", $block->tags);
+	}
+
+	return $block->sort_key;
+}
+
+class sort_css extends lessc {
+	function __construct() {
+		parent::__construct();
+	}
+
+	// normalize numbers
+	function compileValue($value) {
+		$ignore = array('list', 'keyword', 'string', 'color', 'function');
+		if ($value[0] == 'number' || !in_array($value[0], $ignore)) {
+			$value[1] = $value[1] + 0; // convert to either double or int
+		}
+
+		return parent::compileValue($value);
+	}
+
+	function parse_and_sort($str) {
+		$root = $this->parseTree($str);
+
+		$less = $this;
+		usort($root->props, function($a, $b) use ($less) {
+
+			$sort = strcmp(sort_key($a[1]), sort_key($b[1]));
+			if ($sort == 0)
+				return strcmp($less->compileBlock($a[1]), $less->compileBlock($b[1]));
+			return $sort;
+		});
+
+		return $this->compileBlock($root);
+	}
+}
+
+$sorter = new sort_css;
+echo $sorter->parse_and_sort(file_get_contents($fname));
+
diff --git a/mod/less/vendors/lessphp/tests/test.php b/mod/less/vendors/lessphp/tests/test.php
new file mode 100644
index 000000000..629fe0153
--- /dev/null
+++ b/mod/less/vendors/lessphp/tests/test.php
@@ -0,0 +1,190 @@
+#!/usr/bin/env php
+<?php
+error_reporting(E_ALL);
+
+/**
+ * Go through all files matching pattern in input directory
+ * and compile them, then compare them to paired file in
+ * output directory.
+ */
+$difftool = 'diff -b -B -t -u';
+$input = array(
+	'dir' => 'inputs',
+	'glob' => '*.less',
+);
+
+$output = array(
+	'dir' => 'outputs',
+	'filename' => '%s.css',
+);
+
+
+$prefix = strtr(realpath(dirname(__FILE__)), '\\', '/');
+require $prefix.'/../lessc.inc.php';
+
+$compiler = new lessc();
+$compiler->importDir = array($input['dir'].'/test-imports');
+
+$fa = 'Fatal Error: ';
+if (php_sapi_name() != 'cli') {
+	exit($fa.$argv[0].' must be run in the command line.');
+}
+
+$opts = getopt('hCd::g');
+
+if ($opts === false || isset($opts['h'])) {
+	echo <<<EOT
+Usage: ./test.php [options] [searchstring]
+
+where [options] can be a mix of these:
+
+  -h              Show this help message and exit.
+
+  -d=[difftool]   Show the diff of the actual output vs. the reference when a
+                  test fails; uses 'diff -b -B -t -u' by default.
+
+                  The test is aborted after the first failure report, unless
+                  you also specify the '-g' option ('go on').
+
+  -g              Continue executing the other tests when a test fails and
+                  option '-d' is active.
+
+  -C              Regenerate ('compile') the reference output files from the
+                  given inputs.
+
+                  WARNING: ONLY USE THIS OPTION WHEN YOU HAVE ASCERTAINED
+                           THAT lessphp PROCESSES ALL TESTS CORRECTLY!
+
+The optional [searchstring] is used to filter the input files: only tests
+which have filename(s) containing the specified searchstring will be
+executed. I.e. the corresponding glob pattern is '*[searchstring]*.less'.
+
+The script EXIT CODE is the number of failed tests (with a maximum of 255),
+0 on success and 1 when this help message is shown. This aids in integrating
+this script in larger (user defined) shell test scripts.
+
+
+Examples of use:
+
+- Test the full test set:
+    ./test.php
+
+- Run only the mixin tests:
+    ./test.php mixin
+
+- Use a custom diff tool to show diffs for failing tests
+    ./test.php -d=meld
+
+EOT;
+	exit(1);
+}
+
+$input['dir'] = $prefix.'/'.$input['dir'];
+$output['dir'] = $prefix.'/'.$output['dir'];
+if (!is_dir($input['dir']) || !is_dir($output['dir']))
+	exit($fa." both input and output directories must exist\n");
+
+$exe = array_shift($argv); // remove filename
+// get the first non flag as search string
+$searchString = null;
+foreach ($argv as $a) {
+	if (strlen($a) > 0 && $a{0} != '-') {
+		$searchString = $a;
+		break;
+	}
+}
+
+$tests = array();
+$matches = glob($input['dir'].'/'.(!is_null($searchString) ? '*'.$searchString : '' ).$input['glob']);
+if ($matches) {
+	foreach ($matches as $fname) {
+		extract(pathinfo($fname)); // for $filename, from php 5.2
+		$tests[] = array(
+			'in' => $fname,
+			'out' => $output['dir'].'/'.sprintf($output['filename'], $filename),
+		);
+	}
+}
+
+$count = count($tests);
+$compiling = isset($opts["C"]);
+$continue_when_test_fails = isset($opts["g"]);
+$showDiff = isset($opts["d"]);
+if ($showDiff && !empty($opts["d"])) {
+	$difftool = $opts["d"];
+}
+
+echo ($compiling ? "Compiling" : "Running")." $count test".($count == 1 ? '' : 's').":\n";
+
+function dump($msgs, $depth = 1, $prefix="    ") {
+	if (!is_array($msgs)) $msgs = array($msgs);
+	foreach ($msgs as $m) {
+		echo str_repeat($prefix, $depth).' - '.$m."\n";
+	}
+}
+
+$fail_prefix = " ** ";
+
+$fail_count = 0;
+$i = 1;
+foreach ($tests as $test) {
+	printf("    [Test %04d/%04d] %s -> %s\n", $i, $count, basename($test['in']), basename($test['out']));
+
+	try {
+		ob_start();
+		$parsed = trim($compiler->parse(file_get_contents($test['in'])));
+		ob_end_clean();
+	} catch (exception $e) {
+		dump(array(
+			"Failed to compile input, reason:",
+			$e->getMessage(),
+			"Aborting"
+		), 1, $fail_prefix);
+		break;
+	}
+
+	if ($compiling) {
+		file_put_contents($test['out'], $parsed);
+	} else {
+		if (!is_file($test['out'])) {
+			dump(array(
+				"Failed to find output file: $test[out]",
+				"Maybe you forgot to compile tests?",
+				"Aborting"
+			), 1, $fail_prefix);
+			break;
+		}
+		$expected = trim(file_get_contents($test['out']));
+
+		// don't care about CRLF vs LF change (DOS/Win vs. UNIX):
+		$expected = trim(str_replace("\r\n", "\n", $expected));
+		$parsed = trim(str_replace("\r\n", "\n", $parsed));
+
+		if ($expected != $parsed) {
+			$fail_count++;
+			if ($showDiff) {
+				dump("Failed:", 1, $fail_prefix);
+				$tmp = $test['out'].".tmp";
+				file_put_contents($tmp, $parsed);
+				system($difftool.' '.$test['out'].' '.$tmp);
+				unlink($tmp);
+
+				if (!$continue_when_test_fails) {
+					dump("Aborting");
+					break;
+				} else {
+					echo "===========================================================================\n";
+				}
+			} else {
+				dump("Failed, run with -d flag to view diff", 1, $fail_prefix);
+			}
+		} else {
+			dump("Passed");
+		}
+	}
+
+	$i++;
+}
+
+exit($fail_count > 255 ? 255 : $fail_count);
+?>