Squashed 'mod/less/' content from commit 380edad

git-subtree-dir: mod/less
git-subtree-split: 380edadb3a5e524a8e6ef6df063b678f2f00516f

1 files changed, 447 insertions, 0 deletions

diff --git a/vendors/lessphp/lessify.inc.php b/vendors/lessphp/lessify.inc.php
new file mode 100644
index 000000000..96d7d2a92
--- /dev/null
+++ b/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('}');
+			}
+		}
+	}
+}