3676 lines
90 KiB
PHP
3676 lines
90 KiB
PHP
<?php
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/**
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* lessphp v0.4.0
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* http://leafo.net/lessphp
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*
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* LESS css compiler, adapted from http://lesscss.org
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*
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* Copyright 2012, Leaf Corcoran <leafot@gmail.com>
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* Licensed under MIT or GPLv3, see LICENSE
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*/
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/**
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* The less compiler and parser.
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*
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* Converting LESS to CSS is a three stage process. The incoming file is parsed
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* by `lessc_parser` into a syntax tree, then it is compiled into another tree
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* representing the CSS structure by `lessc`. The CSS tree is fed into a
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* formatter, like `lessc_formatter` which then outputs CSS as a string.
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*
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* During the first compile, all values are *reduced*, which means that their
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* types are brought to the lowest form before being dump as strings. This
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* handles math equations, variable dereferences, and the like.
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*
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* The `parse` function of `lessc` is the entry point.
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*
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* In summary:
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*
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* The `lessc` class creates an intstance of the parser, feeds it LESS code,
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* then transforms the resulting tree to a CSS tree. This class also holds the
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* evaluation context, such as all available mixins and variables at any given
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* time.
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*
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* The `lessc_parser` class is only concerned with parsing its input.
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*
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* The `lessc_formatter` takes a CSS tree, and dumps it to a formatted string,
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* handling things like indentation.
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*/
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class lessc {
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static public $VERSION = "v0.4.0";
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static protected $TRUE = array("keyword", "true");
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static protected $FALSE = array("keyword", "false");
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protected $libFunctions = array();
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protected $registeredVars = array();
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protected $preserveComments = false;
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public $vPrefix = '@'; // prefix of abstract properties
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public $mPrefix = '$'; // prefix of abstract blocks
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public $parentSelector = '&';
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public $importDisabled = false;
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/** @var string|string[] */
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public $importDir;
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protected $numberPrecision = null;
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protected $allParsedFiles = array();
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// set to the parser that generated the current line when compiling
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// so we know how to create error messages
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protected $sourceParser = null;
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protected $sourceLoc = null;
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static public $defaultValue = array("keyword", "");
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static protected $nextImportId = 0; // uniquely identify imports
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// attempts to find the path of an import url, returns null for css files
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protected function findImport($url) {
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foreach ((array)$this->importDir as $dir) {
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$full = $dir.(substr($dir, -1) != '/' ? '/' : '').$url;
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if ($this->fileExists($file = $full.'.less') || $this->fileExists($file = $full)) {
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return $file;
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}
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}
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return null;
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}
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protected function fileExists($name) {
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return is_file($name);
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}
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static public function compressList($items, $delim) {
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if (!isset($items[1]) && isset($items[0])) return $items[0];
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else return array('list', $delim, $items);
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}
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static public function preg_quote($what) {
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return preg_quote($what, '/');
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}
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protected function tryImport($importPath, $parentBlock, $out) {
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if ($importPath[0] == "function" && $importPath[1] == "url") {
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$importPath = $this->flattenList($importPath[2]);
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}
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$str = $this->coerceString($importPath);
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if ($str === null) return false;
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$url = $this->compileValue($this->lib_e($str));
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// don't import if it ends in css
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if (substr_compare($url, '.css', -4, 4) === 0) return false;
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$realPath = $this->findImport($url);
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if ($realPath === null) return false;
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if ($this->importDisabled) {
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return array(false, "/* import disabled */");
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}
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if (isset($this->allParsedFiles[realpath($realPath)])) {
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return array(false, null);
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}
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$this->addParsedFile($realPath);
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$parser = $this->makeParser($realPath);
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$root = $parser->parse(file_get_contents($realPath));
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// set the parents of all the block props
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foreach ($root->props as $prop) {
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if ($prop[0] == "block") {
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$prop[1]->parent = $parentBlock;
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}
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}
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// copy mixins into scope, set their parents
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// bring blocks from import into current block
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// TODO: need to mark the source parser these came from this file
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foreach ($root->children as $childName => $child) {
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if (isset($parentBlock->children[$childName])) {
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$parentBlock->children[$childName] = array_merge(
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$parentBlock->children[$childName],
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$child);
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} else {
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$parentBlock->children[$childName] = $child;
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}
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}
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$pi = pathinfo($realPath);
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$dir = $pi["dirname"];
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list($top, $bottom) = $this->sortProps($root->props, true);
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$this->compileImportedProps($top, $parentBlock, $out, $parser, $dir);
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return array(true, $bottom, $parser, $dir);
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}
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protected function compileImportedProps($props, $block, $out, $sourceParser, $importDir) {
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$oldSourceParser = $this->sourceParser;
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$oldImport = $this->importDir;
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// TODO: this is because the importDir api is stupid
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$this->importDir = (array)$this->importDir;
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array_unshift($this->importDir, $importDir);
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foreach ($props as $prop) {
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$this->compileProp($prop, $block, $out);
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}
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$this->importDir = $oldImport;
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$this->sourceParser = $oldSourceParser;
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}
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/**
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* Recursively compiles a block.
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*
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* A block is analogous to a CSS block in most cases. A single LESS document
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* is encapsulated in a block when parsed, but it does not have parent tags
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* so all of it's children appear on the root level when compiled.
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*
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* Blocks are made up of props and children.
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*
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* Props are property instructions, array tuples which describe an action
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* to be taken, eg. write a property, set a variable, mixin a block.
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*
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* The children of a block are just all the blocks that are defined within.
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* This is used to look up mixins when performing a mixin.
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*
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* Compiling the block involves pushing a fresh environment on the stack,
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* and iterating through the props, compiling each one.
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*
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* See lessc::compileProp()
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*
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*/
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protected function compileBlock($block) {
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switch ($block->type) {
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case "root":
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$this->compileRoot($block);
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break;
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case null:
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$this->compileCSSBlock($block);
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break;
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case "media":
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$this->compileMedia($block);
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break;
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case "directive":
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$name = "@" . $block->name;
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if (!empty($block->value)) {
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$name .= " " . $this->compileValue($this->reduce($block->value));
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}
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$this->compileNestedBlock($block, array($name));
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break;
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default:
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$this->throwError("unknown block type: $block->type\n");
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}
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}
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protected function compileCSSBlock($block) {
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$env = $this->pushEnv();
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$selectors = $this->compileSelectors($block->tags);
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$env->selectors = $this->multiplySelectors($selectors);
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$out = $this->makeOutputBlock(null, $env->selectors);
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$this->scope->children[] = $out;
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$this->compileProps($block, $out);
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$block->scope = $env; // mixins carry scope with them!
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$this->popEnv();
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}
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protected function compileMedia($media) {
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$env = $this->pushEnv($media);
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$parentScope = $this->mediaParent($this->scope);
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$query = $this->compileMediaQuery($this->multiplyMedia($env));
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$this->scope = $this->makeOutputBlock($media->type, array($query));
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$parentScope->children[] = $this->scope;
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$this->compileProps($media, $this->scope);
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if (count($this->scope->lines) > 0) {
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$orphanSelelectors = $this->findClosestSelectors();
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if (!is_null($orphanSelelectors)) {
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$orphan = $this->makeOutputBlock(null, $orphanSelelectors);
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$orphan->lines = $this->scope->lines;
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array_unshift($this->scope->children, $orphan);
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$this->scope->lines = array();
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}
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}
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$this->scope = $this->scope->parent;
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$this->popEnv();
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}
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protected function mediaParent($scope) {
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while (!empty($scope->parent)) {
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if (!empty($scope->type) && $scope->type != "media") {
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break;
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}
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$scope = $scope->parent;
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}
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return $scope;
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}
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protected function compileNestedBlock($block, $selectors) {
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$this->pushEnv($block);
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$this->scope = $this->makeOutputBlock($block->type, $selectors);
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$this->scope->parent->children[] = $this->scope;
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$this->compileProps($block, $this->scope);
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$this->scope = $this->scope->parent;
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$this->popEnv();
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}
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protected function compileRoot($root) {
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$this->pushEnv();
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$this->scope = $this->makeOutputBlock($root->type);
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$this->compileProps($root, $this->scope);
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$this->popEnv();
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}
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protected function compileProps($block, $out) {
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foreach ($this->sortProps($block->props) as $prop) {
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$this->compileProp($prop, $block, $out);
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}
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$out->lines = array_values(array_unique($out->lines));
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}
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protected function sortProps($props, $split = false) {
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$vars = array();
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$imports = array();
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$other = array();
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foreach ($props as $prop) {
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switch ($prop[0]) {
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case "assign":
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if (isset($prop[1][0]) && $prop[1][0] == $this->vPrefix) {
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$vars[] = $prop;
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} else {
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$other[] = $prop;
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}
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break;
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case "import":
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$id = self::$nextImportId++;
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$prop[] = $id;
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$imports[] = $prop;
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$other[] = array("import_mixin", $id);
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break;
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default:
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$other[] = $prop;
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}
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}
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if ($split) {
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return array(array_merge($vars, $imports), $other);
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} else {
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return array_merge($vars, $imports, $other);
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}
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}
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protected function compileMediaQuery($queries) {
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$compiledQueries = array();
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foreach ($queries as $query) {
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$parts = array();
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foreach ($query as $q) {
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switch ($q[0]) {
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case "mediaType":
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$parts[] = implode(" ", array_slice($q, 1));
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break;
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case "mediaExp":
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if (isset($q[2])) {
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$parts[] = "($q[1]: " .
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$this->compileValue($this->reduce($q[2])) . ")";
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} else {
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$parts[] = "($q[1])";
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}
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break;
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case "variable":
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$parts[] = $this->compileValue($this->reduce($q));
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break;
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}
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}
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if (count($parts) > 0) {
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$compiledQueries[] = implode(" and ", $parts);
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}
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}
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$out = "@media";
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if (!empty($parts)) {
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$out .= " " .
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implode($this->formatter->selectorSeparator, $compiledQueries);
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}
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return $out;
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}
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protected function multiplyMedia($env, $childQueries = null) {
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if (is_null($env) ||
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!empty($env->block->type) && $env->block->type != "media")
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{
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return $childQueries;
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}
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// plain old block, skip
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if (empty($env->block->type)) {
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return $this->multiplyMedia($env->parent, $childQueries);
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}
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$out = array();
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$queries = $env->block->queries;
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if (is_null($childQueries)) {
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$out = $queries;
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} else {
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foreach ($queries as $parent) {
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foreach ($childQueries as $child) {
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$out[] = array_merge($parent, $child);
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}
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}
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}
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return $this->multiplyMedia($env->parent, $out);
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}
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protected function expandParentSelectors(&$tag, $replace) {
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$parts = explode("$&$", $tag);
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$count = 0;
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foreach ($parts as &$part) {
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$part = str_replace($this->parentSelector, $replace, $part, $c);
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$count += $c;
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}
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$tag = implode($this->parentSelector, $parts);
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return $count;
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}
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protected function findClosestSelectors() {
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$env = $this->env;
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$selectors = null;
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while ($env !== null) {
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if (isset($env->selectors)) {
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$selectors = $env->selectors;
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break;
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}
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$env = $env->parent;
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}
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return $selectors;
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}
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// multiply $selectors against the nearest selectors in env
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protected function multiplySelectors($selectors) {
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// find parent selectors
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$parentSelectors = $this->findClosestSelectors();
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if (is_null($parentSelectors)) {
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// kill parent reference in top level selector
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foreach ($selectors as &$s) {
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$this->expandParentSelectors($s, "");
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}
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return $selectors;
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}
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$out = array();
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foreach ($parentSelectors as $parent) {
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foreach ($selectors as $child) {
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$count = $this->expandParentSelectors($child, $parent);
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// don't prepend the parent tag if & was used
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if ($count > 0) {
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$out[] = trim($child);
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} else {
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$out[] = trim($parent . ' ' . $child);
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}
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}
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}
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return $out;
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}
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// reduces selector expressions
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protected function compileSelectors($selectors) {
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$out = array();
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foreach ($selectors as $s) {
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if (is_array($s)) {
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list(, $value) = $s;
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$out[] = trim($this->compileValue($this->reduce($value)));
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} else {
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$out[] = $s;
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}
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}
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return $out;
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}
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protected function eq($left, $right) {
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return $left == $right;
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}
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protected function patternMatch($block, $orderedArgs, $keywordArgs) {
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// match the guards if it has them
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// any one of the groups must have all its guards pass for a match
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if (!empty($block->guards)) {
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$groupPassed = false;
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foreach ($block->guards as $guardGroup) {
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foreach ($guardGroup as $guard) {
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$this->pushEnv();
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$this->zipSetArgs($block->args, $orderedArgs, $keywordArgs);
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$negate = false;
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if ($guard[0] == "negate") {
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$guard = $guard[1];
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$negate = true;
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}
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$passed = $this->reduce($guard) == self::$TRUE;
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if ($negate) $passed = !$passed;
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$this->popEnv();
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if ($passed) {
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$groupPassed = true;
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} else {
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$groupPassed = false;
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break;
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}
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}
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if ($groupPassed) break;
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}
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if (!$groupPassed) {
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return false;
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}
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}
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if (empty($block->args)) {
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return $block->isVararg || empty($orderedArgs) && empty($keywordArgs);
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}
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$remainingArgs = $block->args;
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if ($keywordArgs) {
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$remainingArgs = array();
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foreach ($block->args as $arg) {
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if ($arg[0] == "arg" && isset($keywordArgs[$arg[1]])) {
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continue;
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}
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$remainingArgs[] = $arg;
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}
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}
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$i = -1; // no args
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// try to match by arity or by argument literal
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foreach ($remainingArgs as $i => $arg) {
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switch ($arg[0]) {
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case "lit":
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if (empty($orderedArgs[$i]) || !$this->eq($arg[1], $orderedArgs[$i])) {
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return false;
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}
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break;
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case "arg":
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// no arg and no default value
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if (!isset($orderedArgs[$i]) && !isset($arg[2])) {
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return false;
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}
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break;
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case "rest":
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$i--; // rest can be empty
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break 2;
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}
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}
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if ($block->isVararg) {
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return true; // not having enough is handled above
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} else {
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$numMatched = $i + 1;
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// greater than becuase default values always match
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return $numMatched >= count($orderedArgs);
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}
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}
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|
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protected function patternMatchAll($blocks, $orderedArgs, $keywordArgs, $skip=array()) {
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$matches = null;
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foreach ($blocks as $block) {
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// skip seen blocks that don't have arguments
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if (isset($skip[$block->id]) && !isset($block->args)) {
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continue;
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}
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|
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if ($this->patternMatch($block, $orderedArgs, $keywordArgs)) {
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$matches[] = $block;
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}
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}
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return $matches;
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}
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|
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// attempt to find blocks matched by path and args
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|
protected function findBlocks($searchIn, $path, $orderedArgs, $keywordArgs, $seen=array()) {
|
|
if ($searchIn == null) return null;
|
|
if (isset($seen[$searchIn->id])) return null;
|
|
$seen[$searchIn->id] = true;
|
|
|
|
$name = $path[0];
|
|
|
|
if (isset($searchIn->children[$name])) {
|
|
$blocks = $searchIn->children[$name];
|
|
if (count($path) == 1) {
|
|
$matches = $this->patternMatchAll($blocks, $orderedArgs, $keywordArgs, $seen);
|
|
if (!empty($matches)) {
|
|
// This will return all blocks that match in the closest
|
|
// scope that has any matching block, like lessjs
|
|
return $matches;
|
|
}
|
|
} else {
|
|
$matches = array();
|
|
foreach ($blocks as $subBlock) {
|
|
$subMatches = $this->findBlocks($subBlock,
|
|
array_slice($path, 1), $orderedArgs, $keywordArgs, $seen);
|
|
|
|
if (!is_null($subMatches)) {
|
|
foreach ($subMatches as $sm) {
|
|
$matches[] = $sm;
|
|
}
|
|
}
|
|
}
|
|
|
|
return count($matches) > 0 ? $matches : null;
|
|
}
|
|
}
|
|
if ($searchIn->parent === $searchIn) return null;
|
|
return $this->findBlocks($searchIn->parent, $path, $orderedArgs, $keywordArgs, $seen);
|
|
}
|
|
|
|
// sets all argument names in $args to either the default value
|
|
// or the one passed in through $values
|
|
protected function zipSetArgs($args, $orderedValues, $keywordValues) {
|
|
$assignedValues = array();
|
|
|
|
$i = 0;
|
|
foreach ($args as $a) {
|
|
if ($a[0] == "arg") {
|
|
if (isset($keywordValues[$a[1]])) {
|
|
// has keyword arg
|
|
$value = $keywordValues[$a[1]];
|
|
} elseif (isset($orderedValues[$i])) {
|
|
// has ordered arg
|
|
$value = $orderedValues[$i];
|
|
$i++;
|
|
} elseif (isset($a[2])) {
|
|
// has default value
|
|
$value = $a[2];
|
|
} else {
|
|
$this->throwError("Failed to assign arg " . $a[1]);
|
|
$value = null; // :(
|
|
}
|
|
|
|
$value = $this->reduce($value);
|
|
$this->set($a[1], $value);
|
|
$assignedValues[] = $value;
|
|
} else {
|
|
// a lit
|
|
$i++;
|
|
}
|
|
}
|
|
|
|
// check for a rest
|
|
$last = end($args);
|
|
if ($last[0] == "rest") {
|
|
$rest = array_slice($orderedValues, count($args) - 1);
|
|
$this->set($last[1], $this->reduce(array("list", " ", $rest)));
|
|
}
|
|
|
|
// wow is this the only true use of PHP's + operator for arrays?
|
|
$this->env->arguments = $assignedValues + $orderedValues;
|
|
}
|
|
|
|
// compile a prop and update $lines or $blocks appropriately
|
|
protected function compileProp($prop, $block, $out) {
|
|
// set error position context
|
|
$this->sourceLoc = isset($prop[-1]) ? $prop[-1] : -1;
|
|
|
|
switch ($prop[0]) {
|
|
case 'assign':
|
|
list(, $name, $value) = $prop;
|
|
if ($name[0] == $this->vPrefix) {
|
|
$this->set($name, $value);
|
|
} else {
|
|
$out->lines[] = $this->formatter->property($name,
|
|
$this->compileValue($this->reduce($value)));
|
|
}
|
|
break;
|
|
case 'block':
|
|
list(, $child) = $prop;
|
|
$this->compileBlock($child);
|
|
break;
|
|
case 'mixin':
|
|
list(, $path, $args, $suffix) = $prop;
|
|
|
|
$orderedArgs = array();
|
|
$keywordArgs = array();
|
|
foreach ((array)$args as $arg) {
|
|
$argval = null;
|
|
switch ($arg[0]) {
|
|
case "arg":
|
|
if (!isset($arg[2])) {
|
|
$orderedArgs[] = $this->reduce(array("variable", $arg[1]));
|
|
} else {
|
|
$keywordArgs[$arg[1]] = $this->reduce($arg[2]);
|
|
}
|
|
break;
|
|
|
|
case "lit":
|
|
$orderedArgs[] = $this->reduce($arg[1]);
|
|
break;
|
|
default:
|
|
$this->throwError("Unknown arg type: " . $arg[0]);
|
|
}
|
|
}
|
|
|
|
$mixins = $this->findBlocks($block, $path, $orderedArgs, $keywordArgs);
|
|
|
|
if ($mixins === null) {
|
|
// fwrite(STDERR,"failed to find block: ".implode(" > ", $path)."\n");
|
|
break; // throw error here??
|
|
}
|
|
|
|
foreach ($mixins as $mixin) {
|
|
if ($mixin === $block && !$orderedArgs) {
|
|
continue;
|
|
}
|
|
|
|
$haveScope = false;
|
|
if (isset($mixin->parent->scope)) {
|
|
$haveScope = true;
|
|
$mixinParentEnv = $this->pushEnv();
|
|
$mixinParentEnv->storeParent = $mixin->parent->scope;
|
|
}
|
|
|
|
$haveArgs = false;
|
|
if (isset($mixin->args)) {
|
|
$haveArgs = true;
|
|
$this->pushEnv();
|
|
$this->zipSetArgs($mixin->args, $orderedArgs, $keywordArgs);
|
|
}
|
|
|
|
$oldParent = $mixin->parent;
|
|
if ($mixin !== $block) $mixin->parent = $block;
|
|
|
|
foreach ($this->sortProps($mixin->props) as $subProp) {
|
|
if ($suffix !== null &&
|
|
$subProp[0] == "assign" &&
|
|
is_string($subProp[1]) &&
|
|
$subProp[1]{0} != $this->vPrefix)
|
|
{
|
|
$subProp[2] = array(
|
|
'list', ' ',
|
|
array($subProp[2], array('keyword', $suffix))
|
|
);
|
|
}
|
|
|
|
$this->compileProp($subProp, $mixin, $out);
|
|
}
|
|
|
|
$mixin->parent = $oldParent;
|
|
|
|
if ($haveArgs) $this->popEnv();
|
|
if ($haveScope) $this->popEnv();
|
|
}
|
|
|
|
break;
|
|
case 'raw':
|
|
$out->lines[] = $prop[1];
|
|
break;
|
|
case "directive":
|
|
list(, $name, $value) = $prop;
|
|
$out->lines[] = "@$name " . $this->compileValue($this->reduce($value)).';';
|
|
break;
|
|
case "comment":
|
|
$out->lines[] = $prop[1];
|
|
break;
|
|
case "import";
|
|
list(, $importPath, $importId) = $prop;
|
|
$importPath = $this->reduce($importPath);
|
|
|
|
if (!isset($this->env->imports)) {
|
|
$this->env->imports = array();
|
|
}
|
|
|
|
$result = $this->tryImport($importPath, $block, $out);
|
|
|
|
$this->env->imports[$importId] = $result === false ?
|
|
array(false, "@import " . $this->compileValue($importPath).";") :
|
|
$result;
|
|
|
|
break;
|
|
case "import_mixin":
|
|
list(,$importId) = $prop;
|
|
$import = $this->env->imports[$importId];
|
|
if ($import[0] === false) {
|
|
if (isset($import[1])) {
|
|
$out->lines[] = $import[1];
|
|
}
|
|
} else {
|
|
list(, $bottom, $parser, $importDir) = $import;
|
|
$this->compileImportedProps($bottom, $block, $out, $parser, $importDir);
|
|
}
|
|
|
|
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.
|
|
*/
|
|
protected function compileValue($value) {
|
|
switch ($value[0]) {
|
|
case 'list':
|
|
// [1] - delimiter
|
|
// [2] - array of values
|
|
return implode($value[1], array_map(array($this, 'compileValue'), $value[2]));
|
|
case 'raw_color':
|
|
if (!empty($this->formatter->compressColors)) {
|
|
return $this->compileValue($this->coerceColor($value));
|
|
}
|
|
return $value[1];
|
|
case 'keyword':
|
|
// [1] - the keyword
|
|
return $value[1];
|
|
case 'number':
|
|
list(, $num, $unit) = $value;
|
|
// [1] - the number
|
|
// [2] - the unit
|
|
if ($this->numberPrecision !== null) {
|
|
$num = round($num, $this->numberPrecision);
|
|
}
|
|
return $num . $unit;
|
|
case 'string':
|
|
// [1] - contents of string (includes quotes)
|
|
list(, $delim, $content) = $value;
|
|
foreach ($content as &$part) {
|
|
if (is_array($part)) {
|
|
$part = $this->compileValue($part);
|
|
}
|
|
}
|
|
return $delim . implode($content) . $delim;
|
|
case 'color':
|
|
// [1] - red component (either number or 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, $b);
|
|
|
|
if (!empty($this->formatter->compressColors)) {
|
|
// 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':
|
|
list(, $name, $args) = $value;
|
|
return $name.'('.$this->compileValue($args).')';
|
|
default: // assumed to be unit
|
|
$this->throwError("unknown value type: $value[0]");
|
|
}
|
|
}
|
|
|
|
protected function lib_pow($args) {
|
|
list($base, $exp) = $this->assertArgs($args, 2, "pow");
|
|
return pow($this->assertNumber($base), $this->assertNumber($exp));
|
|
}
|
|
|
|
protected function lib_pi() {
|
|
return pi();
|
|
}
|
|
|
|
protected function lib_mod($args) {
|
|
list($a, $b) = $this->assertArgs($args, 2, "mod");
|
|
return $this->assertNumber($a) % $this->assertNumber($b);
|
|
}
|
|
|
|
protected function lib_tan($num) {
|
|
return tan($this->assertNumber($num));
|
|
}
|
|
|
|
protected function lib_sin($num) {
|
|
return sin($this->assertNumber($num));
|
|
}
|
|
|
|
protected function lib_cos($num) {
|
|
return cos($this->assertNumber($num));
|
|
}
|
|
|
|
protected function lib_atan($num) {
|
|
$num = atan($this->assertNumber($num));
|
|
return array("number", $num, "rad");
|
|
}
|
|
|
|
protected function lib_asin($num) {
|
|
$num = asin($this->assertNumber($num));
|
|
return array("number", $num, "rad");
|
|
}
|
|
|
|
protected function lib_acos($num) {
|
|
$num = acos($this->assertNumber($num));
|
|
return array("number", $num, "rad");
|
|
}
|
|
|
|
protected function lib_sqrt($num) {
|
|
return sqrt($this->assertNumber($num));
|
|
}
|
|
|
|
protected function lib_extract($value) {
|
|
list($list, $idx) = $this->assertArgs($value, 2, "extract");
|
|
$idx = $this->assertNumber($idx);
|
|
// 1 indexed
|
|
if ($list[0] == "list" && isset($list[2][$idx - 1])) {
|
|
return $list[2][$idx - 1];
|
|
}
|
|
}
|
|
|
|
protected function lib_isnumber($value) {
|
|
return $this->toBool($value[0] == "number");
|
|
}
|
|
|
|
protected function lib_isstring($value) {
|
|
return $this->toBool($value[0] == "string");
|
|
}
|
|
|
|
protected function lib_iscolor($value) {
|
|
return $this->toBool($this->coerceColor($value));
|
|
}
|
|
|
|
protected function lib_iskeyword($value) {
|
|
return $this->toBool($value[0] == "keyword");
|
|
}
|
|
|
|
protected function lib_ispixel($value) {
|
|
return $this->toBool($value[0] == "number" && $value[2] == "px");
|
|
}
|
|
|
|
protected function lib_ispercentage($value) {
|
|
return $this->toBool($value[0] == "number" && $value[2] == "%");
|
|
}
|
|
|
|
protected function lib_isem($value) {
|
|
return $this->toBool($value[0] == "number" && $value[2] == "em");
|
|
}
|
|
|
|
protected function lib_isrem($value) {
|
|
return $this->toBool($value[0] == "number" && $value[2] == "rem");
|
|
}
|
|
|
|
protected function lib_rgbahex($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 : 255,
|
|
$color[1],$color[2], $color[3]);
|
|
}
|
|
|
|
protected function lib_argb($color){
|
|
return $this->lib_rgbahex($color);
|
|
}
|
|
|
|
// utility func to unquote a string
|
|
protected function lib_e($arg) {
|
|
switch ($arg[0]) {
|
|
case "list":
|
|
$items = $arg[2];
|
|
if (isset($items[0])) {
|
|
return $this->lib_e($items[0]);
|
|
}
|
|
return self::$defaultValue;
|
|
case "string":
|
|
$arg[1] = "";
|
|
return $arg;
|
|
case "keyword":
|
|
return $arg;
|
|
default:
|
|
return array("keyword", $this->compileValue($arg));
|
|
}
|
|
}
|
|
|
|
protected function lib__sprintf($args) {
|
|
if ($args[0] != "list") return $args;
|
|
$values = $args[2];
|
|
$string = array_shift($values);
|
|
$template = $this->compileValue($this->lib_e($string));
|
|
|
|
$i = 0;
|
|
if (preg_match_all('/%[dsa]/', $template, $m)) {
|
|
foreach ($m[0] as $match) {
|
|
$val = isset($values[$i]) ?
|
|
$this->reduce($values[$i]) : array('keyword', '');
|
|
|
|
// lessjs compat, renders fully expanded color, not raw color
|
|
if ($color = $this->coerceColor($val)) {
|
|
$val = $color;
|
|
}
|
|
|
|
$i++;
|
|
$rep = $this->compileValue($this->lib_e($val));
|
|
$template = preg_replace('/'.self::preg_quote($match).'/',
|
|
$rep, $template, 1);
|
|
}
|
|
}
|
|
|
|
$d = $string[0] == "string" ? $string[1] : '"';
|
|
return array("string", $d, array($template));
|
|
}
|
|
|
|
protected function lib_floor($arg) {
|
|
$value = $this->assertNumber($arg);
|
|
return array("number", floor($value), $arg[2]);
|
|
}
|
|
|
|
protected function lib_ceil($arg) {
|
|
$value = $this->assertNumber($arg);
|
|
return array("number", ceil($value), $arg[2]);
|
|
}
|
|
|
|
protected function lib_round($arg) {
|
|
$value = $this->assertNumber($arg);
|
|
return array("number", round($value), $arg[2]);
|
|
}
|
|
|
|
protected function lib_unit($arg) {
|
|
if ($arg[0] == "list") {
|
|
list($number, $newUnit) = $arg[2];
|
|
return array("number", $this->assertNumber($number),
|
|
$this->compileValue($this->lib_e($newUnit)));
|
|
} else {
|
|
return array("number", $this->assertNumber($arg), "");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Helper function to get arguments for color manipulation functions.
|
|
* takes a list that contains a color like thing and a percentage
|
|
*/
|
|
protected function colorArgs($args) {
|
|
if ($args[0] != 'list' || count($args[2]) < 2) {
|
|
return array(array('color', 0, 0, 0), 0);
|
|
}
|
|
list($color, $delta) = $args[2];
|
|
$color = $this->assertColor($color);
|
|
$delta = floatval($delta[1]);
|
|
|
|
return array($color, $delta);
|
|
}
|
|
|
|
protected function lib_darken($args) {
|
|
list($color, $delta) = $this->colorArgs($args);
|
|
|
|
$hsl = $this->toHSL($color);
|
|
$hsl[3] = $this->clamp($hsl[3] - $delta, 100);
|
|
return $this->toRGB($hsl);
|
|
}
|
|
|
|
protected 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);
|
|
}
|
|
|
|
protected 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);
|
|
}
|
|
|
|
protected 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);
|
|
}
|
|
|
|
protected 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);
|
|
}
|
|
|
|
protected function lib_fadeout($args) {
|
|
list($color, $delta) = $this->colorArgs($args);
|
|
$color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) - $delta/100);
|
|
return $color;
|
|
}
|
|
|
|
protected function lib_fadein($args) {
|
|
list($color, $delta) = $this->colorArgs($args);
|
|
$color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) + $delta/100);
|
|
return $color;
|
|
}
|
|
|
|
protected function lib_hue($color) {
|
|
$hsl = $this->toHSL($this->assertColor($color));
|
|
return round($hsl[1]);
|
|
}
|
|
|
|
protected function lib_saturation($color) {
|
|
$hsl = $this->toHSL($this->assertColor($color));
|
|
return round($hsl[2]);
|
|
}
|
|
|
|
protected function lib_lightness($color) {
|
|
$hsl = $this->toHSL($this->assertColor($color));
|
|
return round($hsl[3]);
|
|
}
|
|
|
|
// get the alpha of a color
|
|
// defaults to 1 for non-colors or colors without an alpha
|
|
protected function lib_alpha($value) {
|
|
if (!is_null($color = $this->coerceColor($value))) {
|
|
return isset($color[4]) ? $color[4] : 1;
|
|
}
|
|
}
|
|
|
|
// set the alpha of the color
|
|
protected function lib_fade($args) {
|
|
list($color, $alpha) = $this->colorArgs($args);
|
|
$color[4] = $this->clamp($alpha / 100.0);
|
|
return $color;
|
|
}
|
|
|
|
protected function lib_percentage($arg) {
|
|
$num = $this->assertNumber($arg);
|
|
return array("number", $num*100, "%");
|
|
}
|
|
|
|
// mixes two colors by weight
|
|
// mix(@color1, @color2, [@weight: 50%]);
|
|
// http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method
|
|
protected function lib_mix($args) {
|
|
if ($args[0] != "list" || count($args[2]) < 2)
|
|
$this->throwError("mix expects (color1, color2, weight)");
|
|
|
|
list($first, $second) = $args[2];
|
|
$first = $this->assertColor($first);
|
|
$second = $this->assertColor($second);
|
|
|
|
$first_a = $this->lib_alpha($first);
|
|
$second_a = $this->lib_alpha($second);
|
|
|
|
if (isset($args[2][2])) {
|
|
$weight = $args[2][2][1] / 100.0;
|
|
} else {
|
|
$weight = 0.5;
|
|
}
|
|
|
|
$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);
|
|
}
|
|
|
|
protected function lib_contrast($args) {
|
|
if ($args[0] != 'list' || count($args[2]) < 3) {
|
|
return array(array('color', 0, 0, 0), 0);
|
|
}
|
|
|
|
list($inputColor, $darkColor, $lightColor) = $args[2];
|
|
|
|
$inputColor = $this->assertColor($inputColor);
|
|
$darkColor = $this->assertColor($darkColor);
|
|
$lightColor = $this->assertColor($lightColor);
|
|
$hsl = $this->toHSL($inputColor);
|
|
|
|
if ($hsl[3] > 50) {
|
|
return $darkColor;
|
|
}
|
|
|
|
return $lightColor;
|
|
}
|
|
|
|
protected function assertColor($value, $error = "expected color value") {
|
|
$color = $this->coerceColor($value);
|
|
if (is_null($color)) $this->throwError($error);
|
|
return $color;
|
|
}
|
|
|
|
protected function assertNumber($value, $error = "expecting number") {
|
|
if ($value[0] == "number") return $value[1];
|
|
$this->throwError($error);
|
|
}
|
|
|
|
protected function assertArgs($value, $expectedArgs, $name="") {
|
|
if ($expectedArgs == 1) {
|
|
return $value;
|
|
} else {
|
|
if ($value[0] !== "list" || $value[1] != ",") $this->throwError("expecting list");
|
|
$values = $value[2];
|
|
$numValues = count($values);
|
|
if ($expectedArgs != $numValues) {
|
|
if ($name) {
|
|
$name = $name . ": ";
|
|
}
|
|
|
|
$this->throwError("${name}expecting $expectedArgs arguments, got $numValues");
|
|
}
|
|
|
|
return $values;
|
|
}
|
|
}
|
|
|
|
protected function toHSL($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 $out;
|
|
}
|
|
|
|
protected function toRGB_helper($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 $temp1;
|
|
}
|
|
|
|
/**
|
|
* Converts a hsl array into a color value in rgb.
|
|
* Expects H to be in range of 0 to 360, S and L in 0 to 100
|
|
*/
|
|
protected function toRGB($color) {
|
|
if ($color[0] == '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 $out;
|
|
}
|
|
|
|
protected function clamp($v, $max = 1, $min = 0) {
|
|
return min($max, max($min, $v));
|
|
}
|
|
|
|
/**
|
|
* Convert the rgb, rgba, hsl color literals of function type
|
|
* as returned by the parser into values of color type.
|
|
*/
|
|
protected function funcToColor($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 < 3) $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] == "number" && $c[2] == "%") {
|
|
$components[] = 255 * ($c[1] / 100);
|
|
} else {
|
|
$components[] = floatval($c[1]);
|
|
}
|
|
} elseif ($i == 4) {
|
|
if ($c[0] == "number" && $c[2] == "%") {
|
|
$components[] = 1.0 * ($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;
|
|
}
|
|
|
|
protected function reduce($value, $forExpression = false) {
|
|
switch ($value[0]) {
|
|
case "interpolate":
|
|
$reduced = $this->reduce($value[1]);
|
|
$var = $this->compileValue($reduced);
|
|
$res = $this->reduce(array("variable", $this->vPrefix . $var));
|
|
|
|
if ($res[0] == "raw_color") {
|
|
$res = $this->coerceColor($res);
|
|
}
|
|
|
|
if (empty($value[2])) $res = $this->lib_e($res);
|
|
|
|
return $res;
|
|
case "variable":
|
|
$key = $value[1];
|
|
if (is_array($key)) {
|
|
$key = $this->reduce($key);
|
|
$key = $this->vPrefix . $this->compileValue($this->lib_e($key));
|
|
}
|
|
|
|
$seen =& $this->env->seenNames;
|
|
|
|
if (!empty($seen[$key])) {
|
|
$this->throwError("infinite loop detected: $key");
|
|
}
|
|
|
|
$seen[$key] = true;
|
|
$out = $this->reduce($this->get($key, self::$defaultValue));
|
|
$seen[$key] = false;
|
|
return $out;
|
|
case "list":
|
|
foreach ($value[2] as &$item) {
|
|
$item = $this->reduce($item, $forExpression);
|
|
}
|
|
return $value;
|
|
case "expression":
|
|
return $this->evaluate($value);
|
|
case "string":
|
|
foreach ($value[2] as &$part) {
|
|
if (is_array($part)) {
|
|
$strip = $part[0] == "variable";
|
|
$part = $this->reduce($part);
|
|
if ($strip) $part = $this->lib_e($part);
|
|
}
|
|
}
|
|
return $value;
|
|
case "escape":
|
|
list(,$inner) = $value;
|
|
return $this->lib_e($this->reduce($inner));
|
|
case "function":
|
|
$color = $this->funcToColor($value);
|
|
if ($color) return $color;
|
|
|
|
list(, $name, $args) = $value;
|
|
if ($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]);
|
|
|
|
$ret = call_user_func($f, $this->reduce($args, true), $this);
|
|
|
|
if (is_null($ret)) {
|
|
return array("string", "", array(
|
|
$name, "(", $args, ")"
|
|
));
|
|
}
|
|
|
|
// convert to a typed value if the result is a php primitive
|
|
if (is_numeric($ret)) $ret = array('number', $ret, "");
|
|
elseif (!is_array($ret)) $ret = array('keyword', $ret);
|
|
|
|
return $ret;
|
|
}
|
|
|
|
// plain function, reduce args
|
|
$value[2] = $this->reduce($value[2]);
|
|
return $value;
|
|
case "unary":
|
|
list(, $op, $exp) = $value;
|
|
$exp = $this->reduce($exp);
|
|
|
|
if ($exp[0] == "number") {
|
|
switch ($op) {
|
|
case "+":
|
|
return $exp;
|
|
case "-":
|
|
$exp[1] *= -1;
|
|
return $exp;
|
|
}
|
|
}
|
|
return array("string", "", array($op, $exp));
|
|
}
|
|
|
|
if ($forExpression) {
|
|
switch ($value[0]) {
|
|
case "keyword":
|
|
if ($color = $this->coerceColor($value)) {
|
|
return $color;
|
|
}
|
|
break;
|
|
case "raw_color":
|
|
return $this->coerceColor($value);
|
|
}
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
|
|
// coerce a value for use in color operation
|
|
protected function coerceColor($value) {
|
|
switch($value[0]) {
|
|
case 'color': return $value;
|
|
case 'raw_color':
|
|
$c = array("color", 0, 0, 0);
|
|
$colorStr = substr($value[1], 1);
|
|
$num = hexdec($colorStr);
|
|
$width = strlen($colorStr) == 3 ? 16 : 256;
|
|
|
|
for ($i = 3; $i > 0; $i--) { // 3 2 1
|
|
$t = $num % $width;
|
|
$num /= $width;
|
|
|
|
$c[$i] = $t * (256/$width) + $t * floor(16/$width);
|
|
}
|
|
|
|
return $c;
|
|
case 'keyword':
|
|
$name = $value[1];
|
|
if (isset(self::$cssColors[$name])) {
|
|
$rgba = explode(',', self::$cssColors[$name]);
|
|
|
|
if(isset($rgba[3]))
|
|
return array('color', $rgba[0], $rgba[1], $rgba[2], $rgba[3]);
|
|
|
|
return array('color', $rgba[0], $rgba[1], $rgba[2]);
|
|
}
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// make something string like into a string
|
|
protected function coerceString($value) {
|
|
switch ($value[0]) {
|
|
case "string":
|
|
return $value;
|
|
case "keyword":
|
|
return array("string", "", array($value[1]));
|
|
}
|
|
return null;
|
|
}
|
|
|
|
// turn list of length 1 into value type
|
|
protected function flattenList($value) {
|
|
if ($value[0] == "list" && count($value[2]) == 1) {
|
|
return $this->flattenList($value[2][0]);
|
|
}
|
|
return $value;
|
|
}
|
|
|
|
protected function toBool($a) {
|
|
if ($a) return self::$TRUE;
|
|
else return self::$FALSE;
|
|
}
|
|
|
|
// evaluate an expression
|
|
protected function evaluate($exp) {
|
|
list(, $op, $left, $right, $whiteBefore, $whiteAfter) = $exp;
|
|
|
|
$left = $this->reduce($left, true);
|
|
$right = $this->reduce($right, true);
|
|
|
|
if ($leftColor = $this->coerceColor($left)) {
|
|
$left = $leftColor;
|
|
}
|
|
|
|
if ($rightColor = $this->coerceColor($right)) {
|
|
$right = $rightColor;
|
|
}
|
|
|
|
$ltype = $left[0];
|
|
$rtype = $right[0];
|
|
|
|
// operators that work on all types
|
|
if ($op == "and") {
|
|
return $this->toBool($left == self::$TRUE && $right == self::$TRUE);
|
|
}
|
|
|
|
if ($op == "=") {
|
|
return $this->toBool($this->eq($left, $right) );
|
|
}
|
|
|
|
if ($op == "+" && !is_null($str = $this->stringConcatenate($left, $right))) {
|
|
return $str;
|
|
}
|
|
|
|
// type based operators
|
|
$fname = "op_${ltype}_${rtype}";
|
|
if (is_callable(array($this, $fname))) {
|
|
$out = $this->$fname($op, $left, $right);
|
|
if (!is_null($out)) return $out;
|
|
}
|
|
|
|
// make the expression look it did before being parsed
|
|
$paddedOp = $op;
|
|
if ($whiteBefore) $paddedOp = " " . $paddedOp;
|
|
if ($whiteAfter) $paddedOp .= " ";
|
|
|
|
return array("string", "", array($left, $paddedOp, $right));
|
|
}
|
|
|
|
protected function stringConcatenate($left, $right) {
|
|
if ($strLeft = $this->coerceString($left)) {
|
|
if ($right[0] == "string") {
|
|
$right[1] = "";
|
|
}
|
|
$strLeft[2][] = $right;
|
|
return $strLeft;
|
|
}
|
|
|
|
if ($strRight = $this->coerceString($right)) {
|
|
array_unshift($strRight[2], $left);
|
|
return $strRight;
|
|
}
|
|
}
|
|
|
|
|
|
// make sure a color's components don't go out of bounds
|
|
protected function fixColor($c) {
|
|
foreach (range(1, 3) as $i) {
|
|
if ($c[$i] < 0) $c[$i] = 0;
|
|
if ($c[$i] > 255) $c[$i] = 255;
|
|
}
|
|
|
|
return $c;
|
|
}
|
|
|
|
protected function op_number_color($op, $lft, $rgt) {
|
|
if ($op == '+' || $op == '*') {
|
|
return $this->op_color_number($op, $rgt, $lft);
|
|
}
|
|
}
|
|
|
|
protected function op_color_number($op, $lft, $rgt) {
|
|
if ($rgt[0] == '%') $rgt[1] /= 100;
|
|
|
|
return $this->op_color_color($op, $lft,
|
|
array_fill(1, count($lft) - 1, $rgt[1]));
|
|
}
|
|
|
|
protected function op_color_color($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);
|
|
}
|
|
|
|
function lib_red($color){
|
|
$color = $this->coerceColor($color);
|
|
if (is_null($color)) {
|
|
$this->throwError('color expected for red()');
|
|
}
|
|
|
|
return $color[1];
|
|
}
|
|
|
|
function lib_green($color){
|
|
$color = $this->coerceColor($color);
|
|
if (is_null($color)) {
|
|
$this->throwError('color expected for green()');
|
|
}
|
|
|
|
return $color[2];
|
|
}
|
|
|
|
function lib_blue($color){
|
|
$color = $this->coerceColor($color);
|
|
if (is_null($color)) {
|
|
$this->throwError('color expected for blue()');
|
|
}
|
|
|
|
return $color[3];
|
|
}
|
|
|
|
|
|
// operator on two numbers
|
|
protected function op_number_number($op, $left, $right) {
|
|
$unit = empty($left[2]) ? $right[2] : $left[2];
|
|
|
|
$value = 0;
|
|
switch ($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("number", $value, $unit);
|
|
}
|
|
|
|
|
|
/* environment functions */
|
|
|
|
protected function makeOutputBlock($type, $selectors = null) {
|
|
$b = new stdclass;
|
|
$b->lines = array();
|
|
$b->children = array();
|
|
$b->selectors = $selectors;
|
|
$b->type = $type;
|
|
$b->parent = $this->scope;
|
|
return $b;
|
|
}
|
|
|
|
// the state of execution
|
|
protected function pushEnv($block = null) {
|
|
$e = new stdclass;
|
|
$e->parent = $this->env;
|
|
$e->store = array();
|
|
$e->block = $block;
|
|
|
|
$this->env = $e;
|
|
return $e;
|
|
}
|
|
|
|
// pop something off the stack
|
|
protected function popEnv() {
|
|
$old = $this->env;
|
|
$this->env = $this->env->parent;
|
|
return $old;
|
|
}
|
|
|
|
// set something in the current env
|
|
protected function set($name, $value) {
|
|
$this->env->store[$name] = $value;
|
|
}
|
|
|
|
|
|
// get the highest occurrence entry for a name
|
|
protected function get($name, $default=null) {
|
|
$current = $this->env;
|
|
|
|
$isArguments = $name == $this->vPrefix . 'arguments';
|
|
while ($current) {
|
|
if ($isArguments && isset($current->arguments)) {
|
|
return array('list', ' ', $current->arguments);
|
|
}
|
|
|
|
if (isset($current->store[$name]))
|
|
return $current->store[$name];
|
|
else {
|
|
$current = isset($current->storeParent) ?
|
|
$current->storeParent : $current->parent;
|
|
}
|
|
}
|
|
|
|
return $default;
|
|
}
|
|
|
|
// inject array of unparsed strings into environment as variables
|
|
protected function injectVariables($args) {
|
|
$this->pushEnv();
|
|
$parser = new lessc_parser($this, __METHOD__);
|
|
foreach ($args as $name => $strValue) {
|
|
if ($name{0} != '@') $name = '@'.$name;
|
|
$parser->count = 0;
|
|
$parser->buffer = (string)$strValue;
|
|
if (!$parser->propertyValue($value)) {
|
|
throw new Exception("failed to parse passed in variable $name: $strValue");
|
|
}
|
|
|
|
$this->set($name, $value);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initialize any static state, can initialize parser for a file
|
|
* $opts isn't used yet
|
|
*/
|
|
public function __construct($fname = null) {
|
|
if ($fname !== null) {
|
|
// used for deprecated parse method
|
|
$this->_parseFile = $fname;
|
|
}
|
|
}
|
|
|
|
public function compile($string, $name = null) {
|
|
$locale = setlocale(LC_NUMERIC, 0);
|
|
setlocale(LC_NUMERIC, "C");
|
|
|
|
$this->parser = $this->makeParser($name);
|
|
$root = $this->parser->parse($string);
|
|
|
|
$this->env = null;
|
|
$this->scope = null;
|
|
|
|
$this->formatter = $this->newFormatter();
|
|
|
|
if (!empty($this->registeredVars)) {
|
|
$this->injectVariables($this->registeredVars);
|
|
}
|
|
|
|
$this->sourceParser = $this->parser; // used for error messages
|
|
$this->compileBlock($root);
|
|
|
|
ob_start();
|
|
$this->formatter->block($this->scope);
|
|
$out = ob_get_clean();
|
|
setlocale(LC_NUMERIC, $locale);
|
|
return $out;
|
|
}
|
|
|
|
public function compileFile($fname, $outFname = null) {
|
|
if (!is_readable($fname)) {
|
|
throw new Exception('load error: failed to find '.$fname);
|
|
}
|
|
|
|
$pi = pathinfo($fname);
|
|
|
|
$oldImport = $this->importDir;
|
|
|
|
$this->importDir = (array)$this->importDir;
|
|
$this->importDir[] = $pi['dirname'].'/';
|
|
|
|
$this->addParsedFile($fname);
|
|
|
|
$out = $this->compile(file_get_contents($fname), $fname);
|
|
|
|
$this->importDir = $oldImport;
|
|
|
|
if ($outFname !== null) {
|
|
return file_put_contents($outFname, $out);
|
|
}
|
|
|
|
return $out;
|
|
}
|
|
|
|
// compile only if changed input has changed or output doesn't exist
|
|
public function checkedCompile($in, $out) {
|
|
if (!is_file($out) || filemtime($in) > filemtime($out)) {
|
|
$this->compileFile($in, $out);
|
|
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 $force Force rebuild?
|
|
* @return array lessphp cache structure
|
|
*/
|
|
public function cachedCompile($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.
|
|
$out = array();
|
|
$out['root'] = $root;
|
|
$out['compiled'] = $this->compileFile($root);
|
|
$out['files'] = $this->allParsedFiles();
|
|
$out['updated'] = time();
|
|
return $out;
|
|
} else {
|
|
// No changes, pass back the structure
|
|
// we were given initially.
|
|
return $in;
|
|
}
|
|
|
|
}
|
|
|
|
// parse and compile buffer
|
|
// This is deprecated
|
|
public function parse($str = null, $initialVariables = null) {
|
|
if (is_array($str)) {
|
|
$initialVariables = $str;
|
|
$str = null;
|
|
}
|
|
|
|
$oldVars = $this->registeredVars;
|
|
if ($initialVariables !== null) {
|
|
$this->setVariables($initialVariables);
|
|
}
|
|
|
|
if ($str == null) {
|
|
if (empty($this->_parseFile)) {
|
|
throw new exception("nothing to parse");
|
|
}
|
|
|
|
$out = $this->compileFile($this->_parseFile);
|
|
} else {
|
|
$out = $this->compile($str);
|
|
}
|
|
|
|
$this->registeredVars = $oldVars;
|
|
return $out;
|
|
}
|
|
|
|
protected function makeParser($name) {
|
|
$parser = new lessc_parser($this, $name);
|
|
$parser->writeComments = $this->preserveComments;
|
|
|
|
return $parser;
|
|
}
|
|
|
|
public function setFormatter($name) {
|
|
$this->formatterName = $name;
|
|
}
|
|
|
|
protected function newFormatter() {
|
|
$className = "lessc_formatter_lessjs";
|
|
if (!empty($this->formatterName)) {
|
|
if (!is_string($this->formatterName))
|
|
return $this->formatterName;
|
|
$className = "lessc_formatter_$this->formatterName";
|
|
}
|
|
|
|
return new $className;
|
|
}
|
|
|
|
public function setPreserveComments($preserve) {
|
|
$this->preserveComments = $preserve;
|
|
}
|
|
|
|
public function registerFunction($name, $func) {
|
|
$this->libFunctions[$name] = $func;
|
|
}
|
|
|
|
public function unregisterFunction($name) {
|
|
unset($this->libFunctions[$name]);
|
|
}
|
|
|
|
public function setVariables($variables) {
|
|
$this->registeredVars = array_merge($this->registeredVars, $variables);
|
|
}
|
|
|
|
public function unsetVariable($name) {
|
|
unset($this->registeredVars[$name]);
|
|
}
|
|
|
|
public function setImportDir($dirs) {
|
|
$this->importDir = (array)$dirs;
|
|
}
|
|
|
|
public function addImportDir($dir) {
|
|
$this->importDir = (array)$this->importDir;
|
|
$this->importDir[] = $dir;
|
|
}
|
|
|
|
public function allParsedFiles() {
|
|
return $this->allParsedFiles;
|
|
}
|
|
|
|
protected function addParsedFile($file) {
|
|
$this->allParsedFiles[realpath($file)] = filemtime($file);
|
|
}
|
|
|
|
/**
|
|
* Uses the current value of $this->count to show line and line number
|
|
*/
|
|
protected function throwError($msg = null) {
|
|
if ($this->sourceLoc >= 0) {
|
|
$this->sourceParser->throwError($msg, $this->sourceLoc);
|
|
}
|
|
throw new exception($msg);
|
|
}
|
|
|
|
// 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, $less = null) {
|
|
if ($less === null) {
|
|
$less = new self;
|
|
}
|
|
return $less->checkedCompile($in, $out);
|
|
}
|
|
|
|
public static function cexecute($in, $force = false, $less = null) {
|
|
if ($less === null) {
|
|
$less = new self;
|
|
}
|
|
return $less->cachedCompile($in, $force);
|
|
}
|
|
|
|
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',
|
|
'transparent' => '0,0,0,0',
|
|
'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,
|
|
);
|
|
|
|
static protected $whitePattern;
|
|
static protected $commentMulti;
|
|
|
|
static protected $commentSingle = "//";
|
|
static protected $commentMultiLeft = "/*";
|
|
static protected $commentMultiRight = "*/";
|
|
|
|
// 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');
|
|
|
|
protected $blockDirectives = array("font-face", "keyframes", "page", "-moz-document", "viewport", "-moz-viewport", "-o-viewport", "-ms-viewport");
|
|
protected $lineDirectives = array("charset");
|
|
|
|
/**
|
|
* 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;
|
|
|
|
// caches preg escaped literals
|
|
static protected $literalCache = array();
|
|
|
|
public function __construct($lessc, $sourceName = null) {
|
|
$this->eatWhiteDefault = true;
|
|
// reference to less needed for vPrefix, mPrefix, and parentSelector
|
|
$this->lessc = $lessc;
|
|
|
|
$this->sourceName = $sourceName; // name used for error messages
|
|
|
|
$this->writeComments = false;
|
|
|
|
if (!self::$operatorString) {
|
|
self::$operatorString =
|
|
'('.implode('|', array_map(array('lessc', 'preg_quote'),
|
|
array_keys(self::$precedence))).')';
|
|
|
|
$commentSingle = lessc::preg_quote(self::$commentSingle);
|
|
$commentMultiLeft = lessc::preg_quote(self::$commentMultiLeft);
|
|
$commentMultiRight = lessc::preg_quote(self::$commentMultiRight);
|
|
|
|
self::$commentMulti = $commentMultiLeft.'.*?'.$commentMultiRight;
|
|
self::$whitePattern = '/'.$commentSingle.'[^\n]*\s*|('.self::$commentMulti.')\s*|\s+/Ais';
|
|
}
|
|
}
|
|
|
|
public function parse($buffer) {
|
|
$this->count = 0;
|
|
$this->line = 1;
|
|
|
|
$this->env = null; // block stack
|
|
$this->buffer = $this->writeComments ? $buffer : $this->removeComments($buffer);
|
|
$this->pushSpecialBlock("root");
|
|
$this->eatWhiteDefault = true;
|
|
$this->seenComments = array();
|
|
|
|
// trim whitespace on head
|
|
// if (preg_match('/^\s+/', $this->buffer, $m)) {
|
|
// $this->line += substr_count($m[0], "\n");
|
|
// $this->buffer = ltrim($this->buffer);
|
|
// }
|
|
$this->whitespace();
|
|
|
|
// 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');
|
|
|
|
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->literal('@', false)) {
|
|
$this->count--;
|
|
|
|
// media
|
|
if ($this->literal('@media')) {
|
|
if (($this->mediaQueryList($mediaQueries) || true)
|
|
&& $this->literal('{'))
|
|
{
|
|
$media = $this->pushSpecialBlock("media");
|
|
$media->queries = is_null($mediaQueries) ? array() : $mediaQueries;
|
|
return true;
|
|
} else {
|
|
$this->seek($s);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if ($this->literal("@", false) && $this->keyword($dirName)) {
|
|
if ($this->isDirective($dirName, $this->blockDirectives)) {
|
|
if (($this->openString("{", $dirValue, null, array(";")) || true) &&
|
|
$this->literal("{"))
|
|
{
|
|
$dir = $this->pushSpecialBlock("directive");
|
|
$dir->name = $dirName;
|
|
if (isset($dirValue)) $dir->value = $dirValue;
|
|
return true;
|
|
}
|
|
} elseif ($this->isDirective($dirName, $this->lineDirectives)) {
|
|
if ($this->propertyValue($dirValue) && $this->end()) {
|
|
$this->append(array("directive", $dirName, $dirValue));
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
$this->seek($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 ($this->import($importValue)) {
|
|
$this->append($importValue, $s);
|
|
return true;
|
|
}
|
|
|
|
// opening parametric mixin
|
|
if ($this->tag($tag, true) && $this->argumentDef($args, $isVararg) &&
|
|
($this->guards($guards) || true) &&
|
|
$this->literal('{'))
|
|
{
|
|
$block = $this->pushBlock($this->fixTags(array($tag)));
|
|
$block->args = $args;
|
|
$block->isVararg = $isVararg;
|
|
if (!empty($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('}', false)) {
|
|
try {
|
|
$block = $this->pop();
|
|
} catch (exception $e) {
|
|
$this->seek($s);
|
|
$this->throwError($e->getMessage());
|
|
}
|
|
|
|
$hidden = false;
|
|
if (is_null($block->type)) {
|
|
$hidden = true;
|
|
if (!isset($block->args)) {
|
|
foreach ($block->tags as $tag) {
|
|
if (!is_string($tag) || $tag{0} != $this->lessc->mPrefix) {
|
|
$hidden = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
foreach ($block->tags as $tag) {
|
|
if (is_string($tag)) {
|
|
$this->env->children[$tag][] = $block;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!$hidden) {
|
|
$this->append(array('block', $block), $s);
|
|
}
|
|
|
|
// this is done here so comments aren't bundled into he block that
|
|
// was just closed
|
|
$this->whitespace();
|
|
return true;
|
|
}
|
|
|
|
// mixin
|
|
if ($this->mixinTags($tags) &&
|
|
($this->argumentDef($argv, $isVararg) || true) &&
|
|
($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 ($this->literal(';')) return true;
|
|
|
|
return false; // got nothing, throw error
|
|
}
|
|
|
|
protected function isDirective($dirname, $directives) {
|
|
// TODO: cache pattern in parser
|
|
$pattern = implode("|",
|
|
array_map(array("lessc", "preg_quote"), $directives));
|
|
$pattern = '/^(-[a-z-]+-)?(' . $pattern . ')$/i';
|
|
|
|
return preg_match($pattern, $dirname);
|
|
}
|
|
|
|
protected function fixTags($tags) {
|
|
// move @ tags out of variable namespace
|
|
foreach ($tags as &$tag) {
|
|
if ($tag{0} == $this->lessc->vPrefix)
|
|
$tag[0] = $this->lessc->mPrefix;
|
|
}
|
|
return $tags;
|
|
}
|
|
|
|
// a list of expressions
|
|
protected function expressionList(&$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(&$out) {
|
|
if ($this->value($lhs)) {
|
|
$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);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* recursively parse infix equation with $lhs at precedence $minP
|
|
*/
|
|
protected function expHelper($lhs, $minP) {
|
|
$this->inExp = true;
|
|
$ss = $this->seek();
|
|
|
|
while (true) {
|
|
$whiteBefore = isset($this->buffer[$this->count - 1]) &&
|
|
ctype_space($this->buffer[$this->count - 1]);
|
|
|
|
// If there is whitespace before the operator, then we require
|
|
// whitespace after the operator for it to be an expression
|
|
$needWhite = $whiteBefore && !$this->inParens;
|
|
|
|
if ($this->match(self::$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;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
$whiteAfter = isset($this->buffer[$this->count - 1]) &&
|
|
ctype_space($this->buffer[$this->count - 1]);
|
|
|
|
if (!$this->value($rhs)) break;
|
|
|
|
// peek for next operator to see what to do with rhs
|
|
if ($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, $whiteBefore, $whiteAfter);
|
|
$ss = $this->seek();
|
|
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
$this->seek($ss);
|
|
|
|
return $lhs;
|
|
}
|
|
|
|
// consume a list of values for a property
|
|
public function propertyValue(&$value, $keyName = null) {
|
|
$values = array();
|
|
|
|
if ($keyName !== null) $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 ($keyName !== null) unset($this->env->currentProperty);
|
|
|
|
if (count($values) == 0) return false;
|
|
|
|
$value = lessc::compressList($values, ', ');
|
|
return true;
|
|
}
|
|
|
|
protected function parenValue(&$out) {
|
|
$s = $this->seek();
|
|
|
|
// speed shortcut
|
|
if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "(") {
|
|
return false;
|
|
}
|
|
|
|
$inParens = $this->inParens;
|
|
if ($this->literal("(") &&
|
|
($this->inParens = true) && $this->expression($exp) &&
|
|
$this->literal(")"))
|
|
{
|
|
$out = $exp;
|
|
$this->inParens = $inParens;
|
|
return true;
|
|
} else {
|
|
$this->inParens = $inParens;
|
|
$this->seek($s);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// a single value
|
|
protected function value(&$value) {
|
|
$s = $this->seek();
|
|
|
|
// speed shortcut
|
|
if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "-") {
|
|
// negation
|
|
if ($this->literal("-", false) &&
|
|
(($this->variable($inner) && $inner = array("variable", $inner)) ||
|
|
$this->unit($inner) ||
|
|
$this->parenValue($inner)))
|
|
{
|
|
$value = array("unary", "-", $inner);
|
|
return true;
|
|
} else {
|
|
$this->seek($s);
|
|
}
|
|
}
|
|
|
|
if ($this->parenValue($value)) return true;
|
|
if ($this->unit($value)) return true;
|
|
if ($this->color($value)) return true;
|
|
if ($this->func($value)) return true;
|
|
if ($this->string($value)) return true;
|
|
|
|
if ($this->keyword($word)) {
|
|
$value = array('keyword', $word);
|
|
return true;
|
|
}
|
|
|
|
// try a variable
|
|
if ($this->variable($var)) {
|
|
$value = array('variable', $var);
|
|
return true;
|
|
}
|
|
|
|
// unquote string (should this work on any type?
|
|
if ($this->literal("~") && $this->string($str)) {
|
|
$value = array("escape", $str);
|
|
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(&$out) {
|
|
$s = $this->seek();
|
|
if (!$this->literal('@import')) return false;
|
|
|
|
// @import "something.css" media;
|
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// @import url("something.css") media;
|
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// @import url(something.css) media;
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|
|
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if ($this->propertyValue($value)) {
|
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$out = array("import", $value);
|
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return true;
|
|
}
|
|
}
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|
|
|
protected function mediaQueryList(&$out) {
|
|
if ($this->genericList($list, "mediaQuery", ",", false)) {
|
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$out = $list[2];
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
protected function mediaQuery(&$out) {
|
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$s = $this->seek();
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|
|
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$expressions = null;
|
|
$parts = array();
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|
|
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if (($this->literal("only") && ($only = true) || $this->literal("not") && ($not = true) || true) && $this->keyword($mediaType)) {
|
|
$prop = array("mediaType");
|
|
if (isset($only)) $prop[] = "only";
|
|
if (isset($not)) $prop[] = "not";
|
|
$prop[] = $mediaType;
|
|
$parts[] = $prop;
|
|
} else {
|
|
$this->seek($s);
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|
}
|
|
|
|
|
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if (!empty($mediaType) && !$this->literal("and")) {
|
|
// ~
|
|
} else {
|
|
$this->genericList($expressions, "mediaExpression", "and", false);
|
|
if (is_array($expressions)) $parts = array_merge($parts, $expressions[2]);
|
|
}
|
|
|
|
if (count($parts) == 0) {
|
|
$this->seek($s);
|
|
return false;
|
|
}
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|
|
|
$out = $parts;
|
|
return true;
|
|
}
|
|
|
|
protected function mediaExpression(&$out) {
|
|
$s = $this->seek();
|
|
$value = null;
|
|
if ($this->literal("(") &&
|
|
$this->keyword($feature) &&
|
|
($this->literal(":") && $this->expression($value) || true) &&
|
|
$this->literal(")"))
|
|
{
|
|
$out = array("mediaExp", $feature);
|
|
if ($value) $out[] = $value;
|
|
return true;
|
|
} elseif ($this->variable($variable)) {
|
|
$out = array('variable', $variable);
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
return false;
|
|
}
|
|
|
|
// an unbounded string stopped by $end
|
|
protected function openString($end, &$out, $nestingOpen=null, $rejectStrs = null) {
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
$this->eatWhiteDefault = false;
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|
|
|
$stop = array("'", '"', "@{", $end);
|
|
$stop = array_map(array("lessc", "preg_quote"), $stop);
|
|
// $stop[] = self::$commentMulti;
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|
|
|
if (!is_null($rejectStrs)) {
|
|
$stop = array_merge($stop, $rejectStrs);
|
|
}
|
|
|
|
$patt = '(.*?)('.implode("|", $stop).')';
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|
|
|
$nestingLevel = 0;
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|
|
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$content = array();
|
|
while ($this->match($patt, $m, false)) {
|
|
if (!empty($m[1])) {
|
|
$content[] = $m[1];
|
|
if ($nestingOpen) {
|
|
$nestingLevel += substr_count($m[1], $nestingOpen);
|
|
}
|
|
}
|
|
|
|
$tok = $m[2];
|
|
|
|
$this->count-= strlen($tok);
|
|
if ($tok == $end) {
|
|
if ($nestingLevel == 0) {
|
|
break;
|
|
} else {
|
|
$nestingLevel--;
|
|
}
|
|
}
|
|
|
|
if (($tok == "'" || $tok == '"') && $this->string($str)) {
|
|
$content[] = $str;
|
|
continue;
|
|
}
|
|
|
|
if ($tok == "@{" && $this->interpolation($inter)) {
|
|
$content[] = $inter;
|
|
continue;
|
|
}
|
|
|
|
if (!empty($rejectStrs) && in_array($tok, $rejectStrs)) {
|
|
break;
|
|
}
|
|
|
|
$content[] = $tok;
|
|
$this->count+= strlen($tok);
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
if (count($content) == 0) return false;
|
|
|
|
// trim the end
|
|
if (is_string(end($content))) {
|
|
$content[count($content) - 1] = rtrim(end($content));
|
|
}
|
|
|
|
$out = array("string", "", $content);
|
|
return true;
|
|
}
|
|
|
|
protected function string(&$out) {
|
|
$s = $this->seek();
|
|
if ($this->literal('"', false)) {
|
|
$delim = '"';
|
|
} elseif ($this->literal("'", false)) {
|
|
$delim = "'";
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
$content = array();
|
|
|
|
// look for either ending delim , escape, or string interpolation
|
|
$patt = '([^\n]*?)(@\{|\\\\|' .
|
|
lessc::preg_quote($delim).')';
|
|
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
$this->eatWhiteDefault = false;
|
|
|
|
while ($this->match($patt, $m, false)) {
|
|
$content[] = $m[1];
|
|
if ($m[2] == "@{") {
|
|
$this->count -= strlen($m[2]);
|
|
if ($this->interpolation($inter, false)) {
|
|
$content[] = $inter;
|
|
} else {
|
|
$this->count += strlen($m[2]);
|
|
$content[] = "@{"; // ignore it
|
|
}
|
|
} elseif ($m[2] == '\\') {
|
|
$content[] = $m[2];
|
|
if ($this->literal($delim, false)) {
|
|
$content[] = $delim;
|
|
}
|
|
} else {
|
|
$this->count -= strlen($delim);
|
|
break; // delim
|
|
}
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
if ($this->literal($delim)) {
|
|
$out = array("string", $delim, $content);
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
return false;
|
|
}
|
|
|
|
protected function interpolation(&$out) {
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
$this->eatWhiteDefault = true;
|
|
|
|
$s = $this->seek();
|
|
if ($this->literal("@{") &&
|
|
$this->openString("}", $interp, null, array("'", '"', ";")) &&
|
|
$this->literal("}", false))
|
|
{
|
|
$out = array("interpolate", $interp);
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
if ($this->eatWhiteDefault) $this->whitespace();
|
|
return true;
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
$this->seek($s);
|
|
return false;
|
|
}
|
|
|
|
protected function unit(&$unit) {
|
|
// speed shortcut
|
|
if (isset($this->buffer[$this->count])) {
|
|
$char = $this->buffer[$this->count];
|
|
if (!ctype_digit($char) && $char != ".") return false;
|
|
}
|
|
|
|
if ($this->match('([0-9]+(?:\.[0-9]*)?|\.[0-9]+)([%a-zA-Z]+)?', $m)) {
|
|
$unit = array("number", $m[1], empty($m[2]) ? "" : $m[2]);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// a # color
|
|
protected function color(&$out) {
|
|
if ($this->match('(#(?:[0-9a-f]{8}|[0-9a-f]{6}|[0-9a-f]{3}))', $m)) {
|
|
if (strlen($m[1]) > 7) {
|
|
$out = array("string", "", array($m[1]));
|
|
} else {
|
|
$out = array("raw_color", $m[1]);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// consume an argument definition list surrounded by ()
|
|
// each argument is a variable name with optional value
|
|
// or at the end a ... or a variable named followed by ...
|
|
// arguments are separated by , unless a ; is in the list, then ; is the
|
|
// delimiter.
|
|
protected function argumentDef(&$args, &$isVararg) {
|
|
$s = $this->seek();
|
|
if (!$this->literal('(')) return false;
|
|
|
|
$values = array();
|
|
$delim = ",";
|
|
$method = "expressionList";
|
|
|
|
$isVararg = false;
|
|
while (true) {
|
|
if ($this->literal("...")) {
|
|
$isVararg = true;
|
|
break;
|
|
}
|
|
|
|
if ($this->$method($value)) {
|
|
if ($value[0] == "variable") {
|
|
$arg = array("arg", $value[1]);
|
|
$ss = $this->seek();
|
|
|
|
if ($this->assign() && $this->$method($rhs)) {
|
|
$arg[] = $rhs;
|
|
} else {
|
|
$this->seek($ss);
|
|
if ($this->literal("...")) {
|
|
$arg[0] = "rest";
|
|
$isVararg = true;
|
|
}
|
|
}
|
|
|
|
$values[] = $arg;
|
|
if ($isVararg) break;
|
|
continue;
|
|
} else {
|
|
$values[] = array("lit", $value);
|
|
}
|
|
}
|
|
|
|
|
|
if (!$this->literal($delim)) {
|
|
if ($delim == "," && $this->literal(";")) {
|
|
// found new delim, convert existing args
|
|
$delim = ";";
|
|
$method = "propertyValue";
|
|
|
|
// transform arg list
|
|
if (isset($values[1])) { // 2 items
|
|
$newList = array();
|
|
foreach ($values as $i => $arg) {
|
|
switch($arg[0]) {
|
|
case "arg":
|
|
if ($i) {
|
|
$this->throwError("Cannot mix ; and , as delimiter types");
|
|
}
|
|
$newList[] = $arg[2];
|
|
break;
|
|
case "lit":
|
|
$newList[] = $arg[1];
|
|
break;
|
|
case "rest":
|
|
$this->throwError("Unexpected rest before semicolon");
|
|
}
|
|
}
|
|
|
|
$newList = array("list", ", ", $newList);
|
|
|
|
switch ($values[0][0]) {
|
|
case "arg":
|
|
$newArg = array("arg", $values[0][1], $newList);
|
|
break;
|
|
case "lit":
|
|
$newArg = array("lit", $newList);
|
|
break;
|
|
}
|
|
|
|
} elseif ($values) { // 1 item
|
|
$newArg = $values[0];
|
|
}
|
|
|
|
if ($newArg) {
|
|
$values = array($newArg);
|
|
}
|
|
} else {
|
|
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 >)
|
|
protected 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(&$parts, &$hasExpression) {
|
|
// speed shortcut
|
|
if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "[") {
|
|
return false;
|
|
}
|
|
|
|
$s = $this->seek();
|
|
|
|
$hasInterpolation = false;
|
|
|
|
if ($this->literal("[", false)) {
|
|
$attrParts = array("[");
|
|
// keyword, string, operator
|
|
while (true) {
|
|
if ($this->literal("]", false)) {
|
|
$this->count--;
|
|
break; // get out early
|
|
}
|
|
|
|
if ($this->match('\s+', $m)) {
|
|
$attrParts[] = " ";
|
|
continue;
|
|
}
|
|
if ($this->string($str)) {
|
|
// escape parent selector, (yuck)
|
|
foreach ($str[2] as &$chunk) {
|
|
$chunk = str_replace($this->lessc->parentSelector, "$&$", $chunk);
|
|
}
|
|
|
|
$attrParts[] = $str;
|
|
$hasInterpolation = true;
|
|
continue;
|
|
}
|
|
|
|
if ($this->keyword($word)) {
|
|
$attrParts[] = $word;
|
|
continue;
|
|
}
|
|
|
|
if ($this->interpolation($inter, false)) {
|
|
$attrParts[] = $inter;
|
|
$hasInterpolation = true;
|
|
continue;
|
|
}
|
|
|
|
// operator, handles attr namespace too
|
|
if ($this->match('[|-~\$\*\^=]+', $m)) {
|
|
$attrParts[] = $m[0];
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if ($this->literal("]", false)) {
|
|
$attrParts[] = "]";
|
|
foreach ($attrParts as $part) {
|
|
$parts[] = $part;
|
|
}
|
|
$hasExpression = $hasExpression || $hasInterpolation;
|
|
return true;
|
|
}
|
|
$this->seek($s);
|
|
}
|
|
|
|
$this->seek($s);
|
|
return false;
|
|
}
|
|
|
|
// a space separated list of selectors
|
|
protected function tag(&$tag, $simple = false) {
|
|
if ($simple)
|
|
$chars = '^@,:;{}\][>\(\) "\'';
|
|
else
|
|
$chars = '^@,;{}["\'';
|
|
|
|
$s = $this->seek();
|
|
|
|
$hasExpression = false;
|
|
$parts = array();
|
|
while ($this->tagBracket($parts, $hasExpression));
|
|
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
$this->eatWhiteDefault = false;
|
|
|
|
while (true) {
|
|
if ($this->match('(['.$chars.'0-9]['.$chars.']*)', $m)) {
|
|
$parts[] = $m[1];
|
|
if ($simple) break;
|
|
|
|
while ($this->tagBracket($parts, $hasExpression));
|
|
continue;
|
|
}
|
|
|
|
if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "@") {
|
|
if ($this->interpolation($interp)) {
|
|
$hasExpression = true;
|
|
$interp[2] = true; // don't unescape
|
|
$parts[] = $interp;
|
|
continue;
|
|
}
|
|
|
|
if ($this->literal("@")) {
|
|
$parts[] = "@";
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if ($this->unit($unit)) { // for keyframes
|
|
$parts[] = $unit[1];
|
|
$parts[] = $unit[2];
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
if (!$parts) {
|
|
$this->seek($s);
|
|
return false;
|
|
}
|
|
|
|
if ($hasExpression) {
|
|
$tag = array("exp", array("string", "", $parts));
|
|
} else {
|
|
$tag = trim(implode($parts));
|
|
}
|
|
|
|
$this->whitespace();
|
|
return true;
|
|
}
|
|
|
|
// a css function
|
|
protected function func(&$func) {
|
|
$s = $this->seek();
|
|
|
|
if ($this->match('(%|[\w\-_][\w\-_:\.]+|[\w_])', $m) && $this->literal('(')) {
|
|
$fname = $m[1];
|
|
|
|
$sPreArgs = $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)) {
|
|
$args[] = array("string", "", array($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
|
|
$this->seek($sPreArgs);
|
|
if ($this->openString(")", $string) && $this->literal(")")) {
|
|
$func = array('function', $fname, $string);
|
|
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->guardGroup($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 guardGroup(&$guardGroup) {
|
|
$s = $this->seek();
|
|
$guardGroup = array();
|
|
while ($this->guard($guard)) {
|
|
$guardGroup[] = $guard;
|
|
if (!$this->literal("and")) break;
|
|
}
|
|
|
|
if (count($guardGroup) == 0) {
|
|
$guardGroup = 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, $eatWhitespace = null) {
|
|
if ($eatWhitespace === null) $eatWhitespace = $this->eatWhiteDefault;
|
|
|
|
// shortcut on single letter
|
|
if (!isset($what[1]) && isset($this->buffer[$this->count])) {
|
|
if ($this->buffer[$this->count] == $what) {
|
|
if (!$eatWhitespace) {
|
|
$this->count++;
|
|
return true;
|
|
}
|
|
// goes below...
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (!isset(self::$literalCache[$what])) {
|
|
self::$literalCache[$what] = lessc::preg_quote($what);
|
|
}
|
|
|
|
return $this->match(self::$literalCache[$what], $m, $eatWhitespace);
|
|
}
|
|
|
|
protected function genericList(&$out, $parseItem, $delim="", $flatten=true) {
|
|
$s = $this->seek();
|
|
$items = array();
|
|
while ($this->$parseItem($value)) {
|
|
$items[] = $value;
|
|
if ($delim) {
|
|
if (!$this->literal($delim)) break;
|
|
}
|
|
}
|
|
|
|
if (count($items) == 0) {
|
|
$this->seek($s);
|
|
return false;
|
|
}
|
|
|
|
if ($flatten && count($items) == 1) {
|
|
$out = $items[0];
|
|
} else {
|
|
$out = array("list", $delim, $items);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
// 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, $eatWhitespace = null) {
|
|
if ($eatWhitespace === null) $eatWhitespace = $this->eatWhiteDefault;
|
|
|
|
$r = '/'.$regex.($eatWhitespace && !$this->writeComments ? '\s*' : '').'/Ais';
|
|
if (preg_match($r, $this->buffer, $out, null, $this->count)) {
|
|
$this->count += strlen($out[0]);
|
|
if ($eatWhitespace && $this->writeComments) $this->whitespace();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// match some whitespace
|
|
protected function whitespace() {
|
|
if ($this->writeComments) {
|
|
$gotWhite = false;
|
|
while (preg_match(self::$whitePattern, $this->buffer, $m, null, $this->count)) {
|
|
if (isset($m[1]) && empty($this->commentsSeen[$this->count])) {
|
|
$this->append(array("comment", $m[1]));
|
|
$this->commentsSeen[$this->count] = true;
|
|
}
|
|
$this->count += strlen($m[0]);
|
|
$gotWhite = true;
|
|
}
|
|
return $gotWhite;
|
|
} else {
|
|
$this->match("", $m);
|
|
return strlen($m[0]) > 0;
|
|
}
|
|
}
|
|
|
|
// 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: $loc");
|
|
}
|
|
}
|
|
|
|
protected function pushBlock($selectors=null, $type=null) {
|
|
$b = new stdclass;
|
|
$b->parent = $this->env;
|
|
|
|
$b->type = $type;
|
|
$b->id = self::$nextBlockId++;
|
|
|
|
$b->isVararg = false; // TODO: kill me from here
|
|
$b->tags = $selectors;
|
|
|
|
$b->props = array();
|
|
$b->children = array();
|
|
|
|
$this->env = $b;
|
|
return $b;
|
|
}
|
|
|
|
// push a block that doesn't multiply tags
|
|
protected function pushSpecialBlock($type) {
|
|
return $this->pushBlock(null, $type);
|
|
}
|
|
|
|
// append a property to the current block
|
|
protected function append($prop, $pos = null) {
|
|
if ($pos !== null) $prop[-1] = $pos;
|
|
$this->env->props[] = $prop;
|
|
}
|
|
|
|
// pop something off the stack
|
|
protected 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 = '';
|
|
$min = null;
|
|
while (true) {
|
|
// find the next item
|
|
foreach ($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_classic {
|
|
public $indentChar = " ";
|
|
|
|
public $break = "\n";
|
|
public $open = " {";
|
|
public $close = "}";
|
|
public $selectorSeparator = ", ";
|
|
public $assignSeparator = ":";
|
|
|
|
public $openSingle = " { ";
|
|
public $closeSingle = " }";
|
|
|
|
public $disableSingle = false;
|
|
public $breakSelectors = false;
|
|
|
|
public $compressColors = false;
|
|
|
|
public function __construct() {
|
|
$this->indentLevel = 0;
|
|
}
|
|
|
|
public function indentStr($n = 0) {
|
|
return str_repeat($this->indentChar, max($this->indentLevel + $n, 0));
|
|
}
|
|
|
|
public function property($name, $value) {
|
|
return $name . $this->assignSeparator . $value . ";";
|
|
}
|
|
|
|
protected function isEmpty($block) {
|
|
if (empty($block->lines)) {
|
|
foreach ($block->children as $child) {
|
|
if (!$this->isEmpty($child)) return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public function block($block) {
|
|
if ($this->isEmpty($block)) return;
|
|
|
|
$inner = $pre = $this->indentStr();
|
|
|
|
$isSingle = !$this->disableSingle &&
|
|
is_null($block->type) && count($block->lines) == 1;
|
|
|
|
if (!empty($block->selectors)) {
|
|
$this->indentLevel++;
|
|
|
|
if ($this->breakSelectors) {
|
|
$selectorSeparator = $this->selectorSeparator . $this->break . $pre;
|
|
} else {
|
|
$selectorSeparator = $this->selectorSeparator;
|
|
}
|
|
|
|
echo $pre .
|
|
implode($selectorSeparator, $block->selectors);
|
|
if ($isSingle) {
|
|
echo $this->openSingle;
|
|
$inner = "";
|
|
} else {
|
|
echo $this->open . $this->break;
|
|
$inner = $this->indentStr();
|
|
}
|
|
|
|
}
|
|
|
|
if (!empty($block->lines)) {
|
|
$glue = $this->break.$inner;
|
|
echo $inner . implode($glue, $block->lines);
|
|
if (!$isSingle && !empty($block->children)) {
|
|
echo $this->break;
|
|
}
|
|
}
|
|
|
|
foreach ($block->children as $child) {
|
|
$this->block($child);
|
|
}
|
|
|
|
if (!empty($block->selectors)) {
|
|
if (!$isSingle && empty($block->children)) echo $this->break;
|
|
|
|
if ($isSingle) {
|
|
echo $this->closeSingle . $this->break;
|
|
} else {
|
|
echo $pre . $this->close . $this->break;
|
|
}
|
|
|
|
$this->indentLevel--;
|
|
}
|
|
}
|
|
}
|
|
|
|
class lessc_formatter_compressed extends lessc_formatter_classic {
|
|
public $disableSingle = true;
|
|
public $open = "{";
|
|
public $selectorSeparator = ",";
|
|
public $assignSeparator = ":";
|
|
public $break = "";
|
|
public $compressColors = true;
|
|
|
|
public function indentStr($n = 0) {
|
|
return "";
|
|
}
|
|
}
|
|
|
|
class lessc_formatter_lessjs extends lessc_formatter_classic {
|
|
public $disableSingle = true;
|
|
public $breakSelectors = true;
|
|
public $assignSeparator = ": ";
|
|
public $selectorSeparator = ",";
|
|
}
|
|
|
|
|