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-<?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;
- }
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2025-03-07 18:24:51 +0000