2236 lines
39 KiB
PHP
2236 lines
39 KiB
PHP
<?php
|
|
/**
|
|
* @package FrameworkOnFramework
|
|
* @subpackage less
|
|
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
|
|
* @license GNU General Public License version 2 or later; see LICENSE.txt
|
|
*/
|
|
// Protect from unauthorized access
|
|
defined('F0F_INCLUDED') or die;
|
|
|
|
/**
|
|
* This class is taken verbatim from:
|
|
*
|
|
* lessphp v0.3.9
|
|
* http://leafo.net/lessphp
|
|
*
|
|
* LESS css compiler, adapted from http://lesscss.org
|
|
*
|
|
* Copyright 2012, Leaf Corcoran <leafot@gmail.com>
|
|
* Licensed under MIT or GPLv3, see LICENSE
|
|
*
|
|
* Responsible for taking a string of LESS code and converting it into a syntax tree
|
|
*
|
|
* @since 2.0
|
|
*/
|
|
class F0FLessParser
|
|
{
|
|
// Used to uniquely identify blocks
|
|
protected static $nextBlockId = 0;
|
|
|
|
protected static $precedence = array(
|
|
'=<' => 0,
|
|
'>=' => 0,
|
|
'=' => 0,
|
|
'<' => 0,
|
|
'>' => 0,
|
|
'+' => 1,
|
|
'-' => 1,
|
|
'*' => 2,
|
|
'/' => 2,
|
|
'%' => 2,
|
|
);
|
|
|
|
protected static $whitePattern;
|
|
|
|
protected static $commentMulti;
|
|
|
|
protected static $commentSingle = "//";
|
|
|
|
protected static $commentMultiLeft = "/*";
|
|
|
|
protected static $commentMultiRight = "*/";
|
|
|
|
// Regex string to match any of the operators
|
|
protected static $operatorString;
|
|
|
|
// These properties will supress division unless it's inside parenthases
|
|
protected static $supressDivisionProps = array('/border-radius$/i', '/^font$/i');
|
|
|
|
protected $blockDirectives = array("font-face", "keyframes", "page", "-moz-document");
|
|
|
|
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
|
|
protected static $literalCache = array();
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* @param [type] $lessc [description]
|
|
* @param string $sourceName [description]
|
|
*/
|
|
public function __construct($lessc, $sourceName = null)
|
|
{
|
|
$this->eatWhiteDefault = true;
|
|
|
|
// Reference to less needed for vPrefix, mPrefix, and parentSelector
|
|
$this->lessc = $lessc;
|
|
|
|
// Name used for error messages
|
|
$this->sourceName = $sourceName;
|
|
|
|
$this->writeComments = false;
|
|
|
|
if (!self::$operatorString)
|
|
{
|
|
self::$operatorString = '(' . implode('|', array_map(array('F0FLess', 'preg_quote'), array_keys(self::$precedence))) . ')';
|
|
|
|
$commentSingle = F0FLess::preg_quote(self::$commentSingle);
|
|
$commentMultiLeft = F0FLess::preg_quote(self::$commentMultiLeft);
|
|
$commentMultiRight = F0FLess::preg_quote(self::$commentMultiRight);
|
|
|
|
self::$commentMulti = $commentMultiLeft . '.*?' . $commentMultiRight;
|
|
self::$whitePattern = '/' . $commentSingle . '[^\n]*\s*|(' . self::$commentMulti . ')\s*|\s+/Ais';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse text
|
|
*
|
|
* @param string $buffer [description]
|
|
*
|
|
* @return [type] [description]
|
|
*/
|
|
public function parse($buffer)
|
|
{
|
|
$this->count = 0;
|
|
$this->line = 1;
|
|
|
|
// Block stack
|
|
$this->env = null;
|
|
$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.
|
|
*
|
|
* @return boolean
|
|
*/
|
|
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->argumentValues($argv) || true)
|
|
&& ($this->keyword($suffix) || true)
|
|
&& $this->end())
|
|
{
|
|
$tags = $this->fixTags($tags);
|
|
$this->append(array('mixin', $tags, $argv, $suffix), $s);
|
|
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
$this->seek($s);
|
|
}
|
|
|
|
// Spare ;
|
|
if ($this->literal(';'))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// Got nothing, throw error
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* [isDirective description]
|
|
*
|
|
* @param string $dirname [description]
|
|
* @param [type] $directives [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function isDirective($dirname, $directives)
|
|
{
|
|
// TODO: cache pattern in parser
|
|
$pattern = implode("|", array_map(array("F0FLess", "preg_quote"), $directives));
|
|
$pattern = '/^(-[a-z-]+-)?(' . $pattern . ')$/i';
|
|
|
|
return preg_match($pattern, $dirname);
|
|
}
|
|
|
|
/**
|
|
* [fixTags description]
|
|
*
|
|
* @param [type] $tags [description]
|
|
*
|
|
* @return [type] [description]
|
|
*/
|
|
protected function fixTags($tags)
|
|
{
|
|
// Move @ tags out of variable namespace
|
|
foreach ($tags as &$tag)
|
|
{
|
|
if ($tag{0} == $this->lessc->vPrefix)
|
|
{
|
|
$tag[0] = $this->lessc->mPrefix;
|
|
}
|
|
}
|
|
|
|
return $tags;
|
|
}
|
|
|
|
/**
|
|
* a list of expressions
|
|
*
|
|
* @param [type] &$exps [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function expressionList(&$exps)
|
|
{
|
|
$values = array();
|
|
|
|
while ($this->expression($exp))
|
|
{
|
|
$values[] = $exp;
|
|
}
|
|
|
|
if (count($values) == 0)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
$exps = F0FLess::compressList($values, ' ');
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Attempt to consume an expression.
|
|
*
|
|
* @param string &$out [description]
|
|
*
|
|
* @link http://en.wikipedia.org/wiki/Operator-precedence_parser#Pseudo-code
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function expression(&$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
|
|
*
|
|
* @param type $lhs [description]
|
|
* @param type $minP [description]
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function expHelper($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 $lhs;
|
|
}
|
|
|
|
/**
|
|
* Consume a list of values for a property
|
|
*
|
|
* @param [type] &$value [description]
|
|
* @param [type] $keyName [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public function propertyValue(&$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;
|
|
}
|
|
|
|
$value = F0FLess::compressList($values, ', ');
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* [parenValue description]
|
|
*
|
|
* @param [type] &$out [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function parenValue(&$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
|
|
*
|
|
* @param [type] &$value [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function value(&$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
|
|
*
|
|
* @param [type] &$out [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function import(&$out)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
if (!$this->literal('@import'))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* @import "something.css" media;
|
|
* @import url("something.css") media;
|
|
* @import url(something.css) media;
|
|
*/
|
|
|
|
if ($this->propertyValue($value))
|
|
{
|
|
$out = array("import", $value);
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* [mediaQueryList description]
|
|
*
|
|
* @param [type] &$out [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function mediaQueryList(&$out)
|
|
{
|
|
if ($this->genericList($list, "mediaQuery", ",", false))
|
|
{
|
|
$out = $list[2];
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* [mediaQuery description]
|
|
*
|
|
* @param [type] &$out [description]
|
|
*
|
|
* @return [type] [description]
|
|
*/
|
|
protected function mediaQuery(&$out)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
$expressions = null;
|
|
$parts = array();
|
|
|
|
if (($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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
$out = $parts;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* [mediaExpression description]
|
|
*
|
|
* @param [type] &$out [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
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
|
|
*
|
|
* @param [type] $end [description]
|
|
* @param [type] &$out [description]
|
|
* @param [type] $nestingOpen [description]
|
|
* @param [type] $rejectStrs [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function openString($end, &$out, $nestingOpen = null, $rejectStrs = null)
|
|
{
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
$this->eatWhiteDefault = false;
|
|
|
|
$stop = array("'", '"', "@{", $end);
|
|
$stop = array_map(array("F0FLess", "preg_quote"), $stop);
|
|
|
|
// $stop[] = self::$commentMulti;
|
|
|
|
if (!is_null($rejectStrs))
|
|
{
|
|
$stop = array_merge($stop, $rejectStrs);
|
|
}
|
|
|
|
$patt = '(.*?)(' . implode("|", $stop) . ')';
|
|
|
|
$nestingLevel = 0;
|
|
|
|
$content = array();
|
|
|
|
while ($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[] = $inter;
|
|
continue;
|
|
}
|
|
|
|
if (in_array($tok, $rejectStrs))
|
|
{
|
|
$count = null;
|
|
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", "", $content);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* [string description]
|
|
*
|
|
* @param [type] &$out [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
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
|
|
$patt = '([^\n]*?)(@\{|\\\\|' . F0FLess::preg_quote($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]);
|
|
|
|
// Ignore it
|
|
$content[] = "@{";
|
|
}
|
|
}
|
|
elseif ($m[2] == '\\')
|
|
{
|
|
$content[] = $m[2];
|
|
|
|
if ($this->literal($delim, false))
|
|
{
|
|
$content[] = $delim;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$this->count -= strlen($delim);
|
|
|
|
// Delim
|
|
break;
|
|
}
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
if ($this->literal($delim))
|
|
{
|
|
$out = array("string", $delim, $content);
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* [interpolation description]
|
|
*
|
|
* @param [type] &$out [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function interpolation(&$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;
|
|
}
|
|
|
|
/**
|
|
* [unit description]
|
|
*
|
|
* @param [type] &$unit [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function unit(&$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]) ? "" : $m[2]);
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* a # color
|
|
*
|
|
* @param [type] &$out [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
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", $m[1]);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Consume a list of property values delimited by ; and wrapped in ()
|
|
*
|
|
* @param [type] &$args [description]
|
|
* @param [type] $delim [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function argumentValues(&$args, $delim = ',')
|
|
{
|
|
$s = $this->seek();
|
|
|
|
if (!$this->literal('('))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
$values = array();
|
|
|
|
while (true)
|
|
{
|
|
if ($this->expressionList($value))
|
|
{
|
|
$values[] = $value;
|
|
}
|
|
|
|
if (!$this->literal($delim))
|
|
{
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
if ($value == null)
|
|
{
|
|
$values[] = null;
|
|
}
|
|
|
|
$value = null;
|
|
}
|
|
}
|
|
|
|
if (!$this->literal(')'))
|
|
{
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
$args = $values;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Consume an argument definition list surrounded by ()
|
|
* each argument is a variable name with optional value
|
|
* or at the end a ... or a variable named followed by ...
|
|
*
|
|
* @param [type] &$args [description]
|
|
* @param [type] &$isVararg [description]
|
|
* @param [type] $delim [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function argumentDef(&$args, &$isVararg, $delim = ',')
|
|
{
|
|
$s = $this->seek();
|
|
if (!$this->literal('('))
|
|
return false;
|
|
|
|
$values = array();
|
|
|
|
$isVararg = false;
|
|
|
|
while (true)
|
|
{
|
|
if ($this->literal("..."))
|
|
{
|
|
$isVararg = true;
|
|
break;
|
|
}
|
|
|
|
if ($this->variable($vname))
|
|
{
|
|
$arg = array("arg", $vname);
|
|
$ss = $this->seek();
|
|
|
|
if ($this->assign() && $this->expressionList($value))
|
|
{
|
|
$arg[] = $value;
|
|
}
|
|
else
|
|
{
|
|
$this->seek($ss);
|
|
|
|
if ($this->literal("..."))
|
|
{
|
|
$arg[0] = "rest";
|
|
$isVararg = true;
|
|
}
|
|
}
|
|
|
|
$values[] = $arg;
|
|
|
|
if ($isVararg)
|
|
{
|
|
break;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if ($this->value($literal))
|
|
{
|
|
$values[] = array("lit", $literal);
|
|
}
|
|
|
|
if (!$this->literal($delim))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!$this->literal(')'))
|
|
{
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
$args = $values;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Consume a list of tags
|
|
* This accepts a hanging delimiter
|
|
*
|
|
* @param [type] &$tags [description]
|
|
* @param [type] $simple [description]
|
|
* @param [type] $delim [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function tags(&$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 >)
|
|
*
|
|
* @param [type] &$tags [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function mixinTags(&$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)
|
|
*
|
|
* @param [type] &$value [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function tagBracket(&$value)
|
|
{
|
|
// Speed shortcut
|
|
if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "[")
|
|
{
|
|
return false;
|
|
}
|
|
|
|
$s = $this->seek();
|
|
|
|
if ($this->literal('[') && $this->to(']', $c, true) && $this->literal(']', false))
|
|
{
|
|
$value = '[' . $c . ']';
|
|
|
|
// Whitespace?
|
|
if ($this->whitespace())
|
|
{
|
|
$value .= " ";
|
|
}
|
|
|
|
// Escape parent selector, (yuck)
|
|
$value = str_replace($this->lessc->parentSelector, "$&$", $value);
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* [tagExpression description]
|
|
*
|
|
* @param [type] &$value [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function tagExpression(&$value)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
if ($this->literal("(") && $this->expression($exp) && $this->literal(")"))
|
|
{
|
|
$value = array('exp', $exp);
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* A single tag
|
|
*
|
|
* @param [type] &$tag [description]
|
|
* @param boolean $simple [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function tag(&$tag, $simple = false)
|
|
{
|
|
if ($simple)
|
|
{
|
|
$chars = '^@,:;{}\][>\(\) "\'';
|
|
}
|
|
else
|
|
{
|
|
$chars = '^@,;{}["\'';
|
|
}
|
|
|
|
$s = $this->seek();
|
|
|
|
if (!$simple && $this->tagExpression($tag))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
$hasExpression = false;
|
|
$parts = array();
|
|
|
|
while ($this->tagBracket($first))
|
|
{
|
|
$parts[] = $first;
|
|
}
|
|
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
|
|
$this->eatWhiteDefault = false;
|
|
|
|
while (true)
|
|
{
|
|
if ($this->match('([' . $chars . '0-9][' . $chars . ']*)', $m))
|
|
{
|
|
$parts[] = $m[1];
|
|
|
|
if ($simple)
|
|
{
|
|
break;
|
|
}
|
|
|
|
while ($this->tagBracket($brack))
|
|
{
|
|
$parts[] = $brack;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "@")
|
|
{
|
|
if ($this->interpolation($interp))
|
|
{
|
|
$hasExpression = true;
|
|
|
|
// Don't unescape
|
|
$interp[2] = true;
|
|
$parts[] = $interp;
|
|
|
|
continue;
|
|
}
|
|
|
|
if ($this->literal("@"))
|
|
{
|
|
$parts[] = "@";
|
|
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// For keyframes
|
|
if ($this->unit($unit))
|
|
{
|
|
$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));
|
|
}
|
|
|
|
$this->whitespace();
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* A css function
|
|
*
|
|
* @param [type] &$func [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
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
|
|
*
|
|
* @param [type] &$name [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function variable(&$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
|
|
*
|
|
* @param string $name [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function assign($name = null)
|
|
{
|
|
if ($name)
|
|
{
|
|
$this->currentProperty = $name;
|
|
}
|
|
|
|
return $this->literal(':') || $this->literal('=');
|
|
}
|
|
|
|
/**
|
|
* Consume a keyword
|
|
*
|
|
* @param [type] &$word [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function keyword(&$word)
|
|
{
|
|
if ($this->match('([\w_\-\*!"][\w\-_"]*)', $m))
|
|
{
|
|
$word = $m[1];
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Consume an end of statement delimiter
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function end()
|
|
{
|
|
if ($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;
|
|
}
|
|
|
|
/**
|
|
* [guards description]
|
|
*
|
|
* @param [type] &$guards [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function guards(&$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
|
|
*
|
|
* @param [type] &$guardGroup [description]
|
|
*
|
|
* @todo rename to guardGroup
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function guardGroup(&$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;
|
|
}
|
|
|
|
/**
|
|
* [guard description]
|
|
*
|
|
* @param [type] &$guard [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function guard(&$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 */
|
|
|
|
/**
|
|
* [literal description]
|
|
*
|
|
* @param [type] $what [description]
|
|
* @param [type] $eatWhitespace [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function literal($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)
|
|
{
|
|
$this->count++;
|
|
|
|
return true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (!isset(self::$literalCache[$what]))
|
|
{
|
|
self::$literalCache[$what] = F0FLess::preg_quote($what);
|
|
}
|
|
|
|
return $this->match(self::$literalCache[$what], $m, $eatWhitespace);
|
|
}
|
|
|
|
/**
|
|
* [genericList description]
|
|
*
|
|
* @param [type] &$out [description]
|
|
* @param [type] $parseItem [description]
|
|
* @param string $delim [description]
|
|
* @param boolean $flatten [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function genericList(&$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
|
|
*
|
|
* @param [type] $what [description]
|
|
* @param [type] &$out [description]
|
|
* @param boolean $until [description]
|
|
* @param boolean $allowNewline [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function to($what, &$out, $until = false, $allowNewline = false)
|
|
{
|
|
if (is_string($allowNewline))
|
|
{
|
|
$validChars = $allowNewline;
|
|
}
|
|
else
|
|
{
|
|
$validChars = $allowNewline ? "." : "[^\n]";
|
|
}
|
|
|
|
if (!$this->match('(' . $validChars . '*?)' . F0FLess::preg_quote($what), $m, !$until))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if ($until)
|
|
{
|
|
// Give back $what
|
|
$this->count -= strlen($what);
|
|
}
|
|
|
|
$out = $m[1];
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Try to match something on head of buffer
|
|
*
|
|
* @param [type] $regex [description]
|
|
* @param [type] &$out [description]
|
|
* @param [type] $eatWhitespace [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function match($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)
|
|
{
|
|
$this->whitespace();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Watch some whitespace
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function whitespace()
|
|
{
|
|
if ($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
|
|
*
|
|
* @param [type] $regex [description]
|
|
* @param [type] &$out [description]
|
|
* @param [type] $from [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function peek($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
|
|
*
|
|
* @param [type] $where [description]
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function seek($where = null)
|
|
{
|
|
if ($where === null)
|
|
{
|
|
return $this->count;
|
|
}
|
|
else
|
|
{
|
|
$this->count = $where;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* misc functions */
|
|
|
|
/**
|
|
* [throwError description]
|
|
*
|
|
* @param string $msg [description]
|
|
* @param [type] $count [description]
|
|
*
|
|
* @return void
|
|
*/
|
|
public function throwError($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");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* [pushBlock description]
|
|
*
|
|
* @param [type] $selectors [description]
|
|
* @param [type] $type [description]
|
|
*
|
|
* @return stdClass
|
|
*/
|
|
protected function pushBlock($selectors = null, $type = null)
|
|
{
|
|
$b = new stdclass;
|
|
$b->parent = $this->env;
|
|
|
|
$b->type = $type;
|
|
$b->id = self::$nextBlockId++;
|
|
|
|
// TODO: kill me from here
|
|
$b->isVararg = false;
|
|
$b->tags = $selectors;
|
|
|
|
$b->props = array();
|
|
$b->children = array();
|
|
|
|
$this->env = $b;
|
|
|
|
return $b;
|
|
}
|
|
|
|
/**
|
|
* Push a block that doesn't multiply tags
|
|
*
|
|
* @param [type] $type [description]
|
|
*
|
|
* @return stdClass
|
|
*/
|
|
protected function pushSpecialBlock($type)
|
|
{
|
|
return $this->pushBlock(null, $type);
|
|
}
|
|
|
|
/**
|
|
* Append a property to the current block
|
|
*
|
|
* @param [type] $prop [description]
|
|
* @param [type] $pos [description]
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function append($prop, $pos = null)
|
|
{
|
|
if ($pos !== null)
|
|
{
|
|
$prop[-1] = $pos;
|
|
}
|
|
|
|
$this->env->props[] = $prop;
|
|
}
|
|
|
|
/**
|
|
* Pop something off the stack
|
|
*
|
|
* @return [type] [description]
|
|
*/
|
|
protected function pop()
|
|
{
|
|
$old = $this->env;
|
|
$this->env = $this->env->parent;
|
|
|
|
return $old;
|
|
}
|
|
|
|
/**
|
|
* Remove comments from $text
|
|
*
|
|
* @param [type] $text [description]
|
|
*
|
|
* @todo: make it work for all functions, not just url
|
|
*
|
|
* @return [type] [description]
|
|
*/
|
|
protected function removeComments($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;
|
|
}
|
|
}
|