Viewing file:  class.csstidy.php (27.76 KB) -rw-rw-rw-
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
/**
* CSSTidy - CSS Parser and Optimiser
*
* CSS Parser class
*
* This file is part of CSSTidy.
*
* CSSTidy is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* CSSTidy is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CSSTidy; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @package csstidy
* @author Florian Schmitz (floele at gmail dot com) 2005-2006
*/
/**
* Various CSS data needed for correct optimisations etc.
*
* @version 1.3
*/
require('data.inc.php');
/**
* Contains a class for printing CSS code
*
* @version 1.0
*/
require('class.csstidy_print.php');
/**
* Contains a class for optimising CSS code
*
* @version 1.0
*/
require('class.csstidy_optimise.php');
/**
* CSS Parser class
*
* This class represents a CSS parser which reads CSS code and saves it in an array.
* In opposite to most other CSS parsers, it does not use regular expressions and
* thus has full CSS2 support and a higher reliability.
* Additional to that it applies some optimisations and fixes to the CSS code.
* An online version should be available here: http://cdburnerxp.se/cssparse/css_optimiser.php
* @package csstidy
* @author Florian Schmitz (floele at gmail dot com) 2005-2006
* @version 1.3
*/
class csstidy {
/**
* Saves the parsed CSS
* @var array
* @access public
*/
var $css = array();
/**
* Saves the parsed CSS (raw)
* @var array
* @access private
*/
var $tokens = array();
/**
* Printer class
* @see csstidy_print
* @var object
* @access public
*/
var $print;
/**
* Optimiser class
* @see csstidy_optimise
* @var object
* @access private
*/
var $optimise;
/**
* Saves the CSS charset (@charset)
* @var string
* @access private
*/
var $charset = '';
/**
* Saves all @import URLs
* @var array
* @access private
*/
var $import = array();
/**
* Saves the namespace
* @var string
* @access private
*/
var $namespace = '';
/**
* Contains the version of csstidy
* @var string
* @access private
*/
var $version = '1.3';
/**
* Stores the settings
* @var array
* @access private
*/
var $settings = array();
/**
* Saves the parser-status.
*
* Possible values:
* - is = in selector
* - ip = in property
* - iv = in value
* - instr = in string (started at " or ' or ( )
* - ic = in comment (ignore everything)
* - at = in @-block
*
* @var string
* @access private
*/
var $status = 'is';
/**
* Saves the current at rule (@media)
* @var string
* @access private
*/
var $at = '';
/**
* Saves the current selector
* @var string
* @access private
*/
var $selector = '';
/**
* Saves the current property
* @var string
* @access private
*/
var $property = '';
/**
* Saves the position of , in selectors
* @var array
* @access private
*/
var $sel_separate = array();
/**
* Saves the current value
* @var string
* @access private
*/
var $value = '';
/**
* Saves the current sub-value
*
* Example for a subvalue:
* background:url(foo.png) red no-repeat;
* "url(foo.png)", "red", and "no-repeat" are subvalues,
* seperated by whitespace
* @var string
* @access private
*/
var $sub_value = '';
/**
* Array which saves all subvalues for a property.
* @var array
* @see sub_value
* @access private
*/
var $sub_value_arr = array();
/**
* Saves the char which opened the last string
* @var string
* @access private
*/
var $str_char = '';
var $cur_string = '';
/**
* Status from which the parser switched to ic or instr
* @var string
* @access private
*/
var $from = '';
/**
* Variable needed to manage string-in-strings, for example url("foo.png")
* @var string
* @access private
*/
var $str_in_str = false;
/**
* =true if in invalid at-rule
* @var bool
* @access private
*/
var $invalid_at = false;
/**
* =true if something has been added to the current selector
* @var bool
* @access private
*/
var $added = false;
/**
* Array which saves the message log
* @var array
* @access private
*/
var $log = array();
/**
* Saves the line number
* @var integer
* @access private
*/
var $line = 1;
/**
* Loads standard template and sets default settings
* @access private
* @version 1.3
*/
function csstidy()
{
$this->settings['remove_bslash'] = true;
$this->settings['compress_colors'] = true;
$this->settings['compress_font-weight'] = true;
$this->settings['lowercase_s'] = false;
$this->settings['optimise_shorthands'] = 1;
$this->settings['remove_last_;'] = false;
$this->settings['case_properties'] = 1;
$this->settings['sort_properties'] = false;
$this->settings['sort_selectors'] = false;
$this->settings['merge_selectors'] = 2;
$this->settings['discard_invalid_properties'] = false;
$this->settings['css_level'] = 'CSS2.1';
$this->settings['preserve_css'] = false;
$this->settings['timestamp'] = false;
$this->load_template('default');
$this->print = new csstidy_print($this);
$this->optimise = new csstidy_optimise($this);
}
/**
* Get the value of a setting.
* @param string $setting
* @access public
* @return mixed
* @version 1.0
*/
function get_cfg($setting)
{
if(isset($this->settings[$setting]))
{
return $this->settings[$setting];
}
return false;
}
/**
* Set the value of a setting.
* @param string $setting
* @param mixed $value
* @access public
* @return bool
* @version 1.0
*/
function set_cfg($setting,$value)
{
if(isset($this->settings[$setting]) && $value !== '')
{
$this->settings[$setting] = $value;
return true;
}
return false;
}
/**
* Adds a token to $this->tokens
* @param mixed $type
* @param string $data
* @param bool $do add a token even if preserve_css is off
* @access private
* @version 1.0
*/
function _add_token($type, $data, $do = false) {
if($this->get_cfg('preserve_css') || $do) {
$this->tokens[] = array($type, ($type == COMMENT) ? $data : trim($data));
}
}
/**
* Add a message to the message log
* @param string $message
* @param string $type
* @param integer $line
* @access private
* @version 1.0
*/
function log($message,$type,$line = -1)
{
if($line === -1)
{
$line = $this->line;
}
$line = intval($line);
$add = array('m' => $message, 't' => $type);
if(!isset($this->log[$line]) || !in_array($add,$this->log[$line]))
{
$this->log[$line][] = $add;
}
}
/**
* Parse unicode notations and find a replacement character
* @param string $string
* @param integer $i
* @access private
* @return string
* @version 1.2
*/
function _unicode(&$string, &$i)
{
++$i;
$add = '';
$tokens =& $GLOBALS['csstidy']['tokens'];
$replaced = false;
while($i < strlen($string) && (ctype_xdigit($string{$i}) || ctype_space($string{$i})) && strlen($add) < 6)
{
$add .= $string{$i};
if(ctype_space($string{$i})) {
break;
}
$i++;
}
if(hexdec($add) > 47 && hexdec($add) < 58 || hexdec($add) > 64 && hexdec($add) < 91 || hexdec($add) > 96 && hexdec($add) < 123)
{
$this->log('Replaced unicode notation: Changed \\'. $add .' to ' . chr(hexdec($add)),'Information');
$add = chr(hexdec($add));
$replaced = true;
}
else {
$add = trim('\\'.$add);
}
if(@ctype_xdigit($string{$i+1}) && ctype_space($string{$i})
&& !$replaced || !ctype_space($string{$i})) {
$i--;
}
if($add != '\\' || !$this->get_cfg('remove_bslash') || strpos($tokens, $string{$i+1}) !== false) {
return $add;
}
if($add == '\\') {
$this->log('Removed unnecessary backslash','Information');
}
return '';
}
/**
* Loads a new template
* @param string $content either filename (if $from_file == true), content of a template file, "high_compression", "highest_compression", "low_compression", or "default"
* @param bool $from_file uses $content as filename if true
* @access public
* @version 1.1
* @see http://csstidy.sourceforge.net/templates.php
*/
function load_template($content, $from_file=true)
{
$predefined_templates =& $GLOBALS['csstidy']['predefined_templates'];
if($content == 'high_compression' || $content == 'default' || $content == 'highest_compression' || $content == 'low_compression')
{
$this->template = $predefined_templates[$content];
return;
}
if($from_file)
{
$content = strip_tags(file_get_contents($content),'<span>');
}
$content = str_replace("\r\n","\n",$content); // Unify newlines (because the output also only uses \n)
$template = explode('|',$content);
for ($i = 0; $i < count($template); $i++ )
{
$this->template[$i] = $template[$i];
}
}
/**
* Starts parsing from URL
* @param string $url
* @access public
* @version 1.0
*/
function parse_from_url($url)
{
return $this->parse(@file_get_contents($url));
}
/**
* Checks if there is a token at the current position
* @param string $string
* @param integer $i
* @access public
* @version 1.11
*/
function is_token(&$string, $i)
{
$tokens =& $GLOBALS['csstidy']['tokens'];
return (strpos($tokens, $string{$i}) !== false && !csstidy::escaped($string,$i));
}
/**
* Parses CSS in $string. The code is saved as array in $this->css
* @param string $string the CSS code
* @access public
* @return bool
* @version 1.1
*/
function parse($string) {
// PHP bug? Settings need to be refreshed in PHP4
$this->print = new csstidy_print($this);
$this->optimise = new csstidy_optimise($this);
$all_properties =& $GLOBALS['csstidy']['all_properties'];
$at_rules =& $GLOBALS['csstidy']['at_rules'];
$this->css = array();
$this->print->input_css = $string;
$string = str_replace("\r\n","\n",$string) . ' ';
$cur_comment = '';
for ($i = 0, $size = strlen($string); $i < $size; $i++ )
{
if($string{$i} == "\n" || $string{$i} == "\r")
{
++$this->line;
}
switch($this->status)
{
/* Case in at-block */
case 'at':
if(csstidy::is_token($string,$i))
{
if($string{$i} == '/' && @$string{$i+1} == '*')
{
$this->status = 'ic'; ++$i;
$this->from = 'at';
}
elseif($string{$i} == '{')
{
$this->status = 'is';
$this->_add_token(AT_START, $this->at);
}
elseif($string{$i} == ',')
{
$this->at = trim($this->at).',';
}
elseif($string{$i} == '\\')
{
$this->at .= $this->_unicode($string,$i);
}
}
else
{
$lastpos = strlen($this->at)-1;
if(!( (ctype_space($this->at{$lastpos}) || csstidy::is_token($this->at,$lastpos) && $this->at{$lastpos} == ',') && ctype_space($string{$i})))
{
$this->at .= $string{$i};
}
}
break;
/* Case in-selector */
case 'is':
if(csstidy::is_token($string,$i))
{
if($string{$i} == '/' && @$string{$i+1} == '*' && trim($this->selector) == '')
{
$this->status = 'ic'; ++$i;
$this->from = 'is';
}
elseif($string{$i} == '@' && trim($this->selector) == '')
{
// Check for at-rule
$this->invalid_at = true;
foreach($at_rules as $name => $type)
{
if(!strcasecmp(substr($string,$i+1,strlen($name)),$name))
{
($type == 'at') ? $this->at = '@'.$name : $this->selector = '@'.$name;
$this->status = $type;
$i += strlen($name);
$this->invalid_at = false;
}
}
if($this->invalid_at)
{
$this->selector = '@';
$invalid_at_name = '';
for($j = $i+1; $j < $size; ++$j)
{
if(!ctype_alpha($string{$j}))
{
break;
}
$invalid_at_name .= $string{$j};
}
$this->log('Invalid @-rule: '.$invalid_at_name.' (removed)','Warning');
}
}
elseif(($string{$i} == '"' || $string{$i} == "'"))
{
$this->cur_string = $string{$i};
$this->status = 'instr';
$this->str_char = $string{$i};
$this->from = 'is';
}
elseif($this->invalid_at && $string{$i} == ';')
{
$this->invalid_at = false;
$this->status = 'is';
}
elseif($string{$i} == '{')
{
$this->status = 'ip';
$this->_add_token(SEL_START, $this->selector);
$this->added = false;
}
elseif($string{$i} == '}')
{
$this->_add_token(AT_END, $this->at);
$this->at = '';
$this->selector = '';
$this->sel_separate = array();
}
elseif($string{$i} == ',')
{
$this->selector = trim($this->selector).',';
$this->sel_separate[] = strlen($this->selector);
}
elseif($string{$i} == '\\')
{
$this->selector .= $this->_unicode($string,$i);
}
// remove unnecessary universal selector, FS#147
else if(!($string{$i} == '*' && @in_array($string{$i+1}, array('.', '#', '[', ':')))) {
$this->selector .= $string{$i};
}
}
else
{
$lastpos = strlen($this->selector)-1;
if($lastpos == -1 || !( (ctype_space($this->selector{$lastpos}) || csstidy::is_token($this->selector,$lastpos) && $this->selector{$lastpos} == ',') && ctype_space($string{$i})))
{
$this->selector .= $string{$i};
}
}
break;
/* Case in-property */
case 'ip':
if(csstidy::is_token($string,$i))
{
if(($string{$i} == ':' || $string{$i} == '=') && $this->property != '')
{
$this->status = 'iv';
if(!$this->get_cfg('discard_invalid_properties') || csstidy::property_is_valid($this->property)) {
$this->_add_token(PROPERTY, $this->property);
}
}
elseif($string{$i} == '/' && @$string{$i+1} == '*' && $this->property == '')
{
$this->status = 'ic'; ++$i;
$this->from = 'ip';
}
elseif($string{$i} == '}')
{
$this->explode_selectors();
$this->status = 'is';
$this->invalid_at = false;
$this->_add_token(SEL_END, $this->selector);
$this->selector = '';
$this->property = '';
}
elseif($string{$i} == ';')
{
$this->property = '';
}
elseif($string{$i} == '\\')
{
$this->property .= $this->_unicode($string,$i);
}
}
elseif(!ctype_space($string{$i}))
{
$this->property .= $string{$i};
}
break;
/* Case in-value */
case 'iv':
$pn = (($string{$i} == "\n" || $string{$i} == "\r") && $this->property_is_next($string,$i+1) || $i == strlen($string)-1);
if(csstidy::is_token($string,$i) || $pn)
{
if($string{$i} == '/' && @$string{$i+1} == '*')
{
$this->status = 'ic'; ++$i;
$this->from = 'iv';
}
elseif(($string{$i} == '"' || $string{$i} == "'" || $string{$i} == '('))
{
$this->cur_string = $string{$i};
$this->str_char = ($string{$i} == '(') ? ')' : $string{$i};
$this->status = 'instr';
$this->from = 'iv';
}
elseif($string{$i} == ',')
{
$this->sub_value = trim($this->sub_value).',';
}
elseif($string{$i} == '\\')
{
$this->sub_value .= $this->_unicode($string,$i);
}
elseif($string{$i} == ';' || $pn)
{
if($this->selector{0} == '@' && isset($at_rules[substr($this->selector,1)]) && $at_rules[substr($this->selector,1)] == 'iv')
{
$this->sub_value_arr[] = trim($this->sub_value);
$this->status = 'is';
switch($this->selector)
{
case '@charset': $this->charset = $this->sub_value_arr[0]; break;
case '@namespace': $this->namespace = implode(' ',$this->sub_value_arr); break;
case '@import': $this->import[] = implode(' ',$this->sub_value_arr); break;
}
$this->sub_value_arr = array();
$this->sub_value = '';
$this->selector = '';
$this->sel_separate = array();
}
else
{
$this->status = 'ip';
}
}
elseif($string{$i} != '}')
{
$this->sub_value .= $string{$i};
}
if(($string{$i} == '}' || $string{$i} == ';' || $pn) && !empty($this->selector))
{
if($this->at == '')
{
$this->at = DEFAULT_AT;
}
// case settings
if($this->get_cfg('lowercase_s'))
{
$this->selector = strtolower($this->selector);
}
$this->property = strtolower($this->property);
$this->optimise->subvalue();
if($this->sub_value != '') {
$this->sub_value_arr[] = $this->sub_value;
$this->sub_value = '';
}
$this->value = implode(' ',$this->sub_value_arr);
$this->selector = trim($this->selector);
$this->optimise->value();
$valid = csstidy::property_is_valid($this->property);
if((!$this->invalid_at || $this->get_cfg('preserve_css')) && (!$this->get_cfg('discard_invalid_properties') || $valid))
{
$this->css_add_property($this->at,$this->selector,$this->property,$this->value);
$this->_add_token(VALUE, $this->value);
$this->optimise->shorthands();
}
if(!$valid)
{
if($this->get_cfg('discard_invalid_properties'))
{
$this->log('Removed invalid property: '.$this->property,'Warning');
}
else
{
$this->log('Invalid property in '.strtoupper($this->get_cfg('css_level')).': '.$this->property,'Warning');
}
}
$this->property = '';
$this->sub_value_arr = array();
$this->value = '';
}
if($string{$i} == '}')
{
$this->explode_selectors();
$this->_add_token(SEL_END, $this->selector);
$this->status = 'is';
$this->invalid_at = false;
$this->selector = '';
}
}
elseif(!$pn)
{
$this->sub_value .= $string{$i};
if(ctype_space($string{$i}))
{
$this->optimise->subvalue();
if($this->sub_value != '') {
$this->sub_value_arr[] = $this->sub_value;
$this->sub_value = '';
}
}
}
break;
/* Case in string */
case 'instr':
if($this->str_char == ')' && ($string{$i} == '"' || $string{$i} == '\'') && !$this->str_in_str && !csstidy::escaped($string,$i))
{
$this->str_in_str = true;
}
elseif($this->str_char == ')' && ($string{$i} == '"' || $string{$i} == '\'') && $this->str_in_str && !csstidy::escaped($string,$i))
{
$this->str_in_str = false;
}
$temp_add = $string{$i}; // ...and no not-escaped backslash at the previous position
if( ($string{$i} == "\n" || $string{$i} == "\r") && !($string{$i-1} == '\\' && !csstidy::escaped($string,$i-1)) )
{
$temp_add = "\\A ";
$this->log('Fixed incorrect newline in string','Warning');
}
if (!($this->str_char == ')' && in_array($string{$i}, $GLOBALS['csstidy']['whitespace']) && !$this->str_in_str)) {
$this->cur_string .= $temp_add;
}
if($string{$i} == $this->str_char && !csstidy::escaped($string,$i) && !$this->str_in_str)
{
$this->status = $this->from;
if (!preg_match('|[' . implode('', $GLOBALS['csstidy']['whitespace']) . ']|uis', $this->cur_string) && $this->property != 'content') {
if ($this->str_char == '"' || $this->str_char == '\'') {
$this->cur_string = substr($this->cur_string, 1, -1);
} else if (strlen($this->cur_string) > 3 && ($this->cur_string[1] == '"' || $this->cur_string[1] == '\'')) /* () */ {
$this->cur_string = $this->cur_string[0] . substr($this->cur_string, 2, -2) . substr($this->cur_string, -1);
}
}
if($this->from == 'iv')
{
$this->sub_value .= $this->cur_string;
}
elseif($this->from == 'is')
{
$this->selector .= $this->cur_string;
}
}
break;
/* Case in-comment */
case 'ic':
if($string{$i} == '*' && $string{$i+1} == '/')
{
$this->status = $this->from;
$i++;
$this->_add_token(COMMENT, $cur_comment);
$cur_comment = '';
}
else
{
$cur_comment .= $string{$i};
}
break;
}
}
$this->optimise->postparse();
$this->print->_reset();
return !(empty($this->css) && empty($this->import) && empty($this->charset) && empty($this->tokens) && empty($this->namespace));
}
/**
* Explodes selectors
* @access private
* @version 1.0
*/
function explode_selectors()
{
// Explode multiple selectors
if($this->get_cfg('merge_selectors') == 1)
{
$new_sels = array();
$lastpos = 0;
$this->sel_separate[] = strlen($this->selector);
foreach($this->sel_separate as $num => $pos)
{
if($num == count($this->sel_separate)-1) {
$pos += 1;
}
$new_sels[] = substr($this->selector,$lastpos,$pos-$lastpos-1);
$lastpos = $pos;
}
if(count($new_sels) > 1)
{
foreach($new_sels as $selector)
{
$this->merge_css_blocks($this->at,$selector,$this->css[$this->at][$this->selector]);
}
unset($this->css[$this->at][$this->selector]);
}
}
$this->sel_separate = array();
}
/**
* Checks if a character is escaped (and returns true if it is)
* @param string $string
* @param integer $pos
* @access public
* @return bool
* @version 1.02
*/
static function escaped(&$string,$pos)
{
return !(@($string{$pos-1} != '\\') || csstidy::escaped($string,$pos-1));
}
/**
* Adds a property with value to the existing CSS code
* @param string $media
* @param string $selector
* @param string $property
* @param string $new_val
* @access private
* @version 1.2
*/
function css_add_property($media,$selector,$property,$new_val)
{
if($this->get_cfg('preserve_css') || trim($new_val) == '') {
return;
}
$this->added = true;
if(isset($this->css[$media][$selector][$property]))
{
if((csstidy::is_important($this->css[$media][$selector][$property]) && csstidy::is_important($new_val)) || !csstidy::is_important($this->css[$media][$selector][$property]))
{
unset($this->css[$media][$selector][$property]);
$this->css[$media][$selector][$property] = trim($new_val);
}
}
else
{
$this->css[$media][$selector][$property] = trim($new_val);
}
}
/**
* Adds CSS to an existing media/selector
* @param string $media
* @param string $selector
* @param array $css_add
* @access private
* @version 1.1
*/
function merge_css_blocks($media,$selector,$css_add)
{
foreach($css_add as $property => $value)
{
$this->css_add_property($media,$selector,$property,$value,false);
}
}
/**
* Checks if $value is !important.
* @param string $value
* @return bool
* @access public
* @version 1.0
*/
static function is_important(&$value)
{
return (!strcasecmp(substr(str_replace($GLOBALS['csstidy']['whitespace'],'',$value),-10,10),'!important'));
}
/**
* Returns a value without !important
* @param string $value
* @return string
* @access public
* @version 1.0
*/
static function gvw_important($value)
{
if(csstidy::is_important($value))
{
$value = trim($value);
$value = substr($value,0,-9);
$value = trim($value);
$value = substr($value,0,-1);
$value = trim($value);
return $value;
}
return $value;
}
/**
* Checks if the next word in a string from pos is a CSS property
* @param string $istring
* @param integer $pos
* @return bool
* @access private
* @version 1.2
*/
function property_is_next($istring, $pos)
{
$all_properties =& $GLOBALS['csstidy']['all_properties'];
$istring = substr($istring,$pos,strlen($istring)-$pos);
$pos = strpos($istring,':');
if($pos === false)
{
return false;
}
$istring = strtolower(trim(substr($istring,0,$pos)));
if(isset($all_properties[$istring]))
{
$this->log('Added semicolon to the end of declaration','Warning');
return true;
}
return false;
}
/**
* Checks if a property is valid
* @param string $property
* @return bool;
* @access public
* @version 1.0
*/
function property_is_valid($property) {
$all_properties =& $GLOBALS['csstidy']['all_properties'];
return (isset($all_properties[$property]) && strpos($all_properties[$property],strtoupper($this->get_cfg('css_level'))) !== false );
}
}
?>
|