- <?php
-- /**
-- * CSSTidy - CSS Parser and Optimiser
-- *
-- * CSS Optimising Class
-- * This class optimises CSS data generated by csstidy.
-- *
-- * 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
-- */
--
-- /**
-- * CSS Optimising Class
-- *
-- * This class optimises CSS data generated by csstidy.
-- *
-- * @package csstidy
-- * @author Florian Schmitz (floele at gmail dot com) 2005-2006
-- * @version 1.0
-- */
--
-- class csstidy_optimise
-- {
-- /**
-- * Constructor
-- * @param array $css contains the class csstidy
-- * @access private
-- * @version 1.0
-- */
-- function csstidy_optimise(&$css)
-- {
-- $this->parser =& $css;
-- $this->css =& $css->css;
-- $this->sub_value =& $css->sub_value;
-- $this->at =& $css->at;
-- $this->selector =& $css->selector;
-- $this->property =& $css->property;
-- $this->value =& $css->value;
-- }
--
-- /**
-- * Optimises $css after parsing
-- * @access public
-- * @version 1.0
-- */
-- function postparse()
-- {
-- if ($this->parser->get_cfg('preserve_css')) {
-- return;
-- }
--
-- if ($this->parser->get_cfg('merge_selectors') == 2)
-- {
-- foreach ($this->css as $medium => $value)
-- {
-- $this->merge_selectors($this->css[$medium]);
-- }
-- }
--
-- if ($this->parser->get_cfg('optimise_shorthands') > 0)
-- {
-- foreach ($this->css as $medium => $value)
-- {
-- foreach ($value as $selector => $value1)
-- {
-- $this->css[$medium][$selector] = csstidy_optimise::merge_4value_shorthands($this->css[$medium][$selector]);
--
-- if ($this->parser->get_cfg('optimise_shorthands') < 2) {
-- continue;
-- }
--
-- $this->css[$medium][$selector] = csstidy_optimise::merge_bg($this->css[$medium][$selector]);
-- if (empty($this->css[$medium][$selector])) {
-- unset($this->css[$medium][$selector]);
-- }
-- }
-- }
-- }
-- }
--
-- /**
-- * Optimises values
-- * @access public
-- * @version 1.0
-- */
-- function value()
-- {
-- $shorthands =& $GLOBALS['csstidy']['shorthands'];
--
-- // optimise shorthand properties
-- if(isset($shorthands[$this->property]))
-- {
-- $temp = csstidy_optimise::shorthand($this->value); // FIXME - move
-- if($temp != $this->value)
-- {
-- $this->parser->log('Optimised shorthand notation ('.$this->property.'): Changed "'.$this->value.'" to "'.$temp.'"','Information');
-- }
-- $this->value = $temp;
-- }
--
-- // Remove whitespace at ! important
-- if($this->value != $this->compress_important($this->value))
-- {
-- $this->parser->log('Optimised !important','Information');
-- }
-- }
--
-- /**
-- * Optimises shorthands
-- * @access public
-- * @version 1.0
-- */
-- function shorthands()
-- {
-- $shorthands =& $GLOBALS['csstidy']['shorthands'];
--
-- if(!$this->parser->get_cfg('optimise_shorthands') || $this->parser->get_cfg('preserve_css')) {
-- return;
-- }
--
-- if($this->property == 'background' && $this->parser->get_cfg('optimise_shorthands') > 1)
-- {
-- unset($this->css[$this->at][$this->selector]['background']);
-- $this->parser->merge_css_blocks($this->at,$this->selector,csstidy_optimise::dissolve_short_bg($this->value));
-- }
-- if(isset($shorthands[$this->property]))
-- {
-- $this->parser->merge_css_blocks($this->at,$this->selector,csstidy_optimise::dissolve_4value_shorthands($this->property,$this->value));
-- if(is_array($shorthands[$this->property]))
-- {
-- unset($this->css[$this->at][$this->selector][$this->property]);
-- }
-- }
-- }
--
-- /**
-- * Optimises a sub-value
-- * @access public
-- * @version 1.0
-- */
-- function subvalue()
-- {
-- $replace_colors =& $GLOBALS['csstidy']['replace_colors'];
--
-- $this->sub_value = trim($this->sub_value);
-- if($this->sub_value == '') // caution : '0'
-- {
-- return;
-- }
--
-- // Compress font-weight
-- if($this->property == 'font-weight' && $this->parser->get_cfg('compress_font-weight'))
-- {
-- $important = '';
-- if(csstidy::is_important($this->sub_value))
-- {
-- $important = ' !important';
-- $this->sub_value = csstidy::gvw_important($this->sub_value);
-- }
-- if($this->sub_value == 'bold')
-- {
-- $this->sub_value = '700'.$important;
-- $this->parser->log('Optimised font-weight: Changed "bold" to "700"','Information');
-- }
-- else if($this->sub_value == 'normal')
-- {
-- $this->sub_value = '400'.$important;
-- $this->parser->log('Optimised font-weight: Changed "normal" to "400"','Information');
-- }
-- }
--
-- $temp = $this->compress_numbers($this->sub_value);
-- if($temp != $this->sub_value)
-- {
-- if(strlen($temp) > strlen($this->sub_value)) {
-- $this->parser->log('Fixed invalid number: Changed "'.$this->sub_value.'" to "'.$temp.'"','Warning');
-- } else {
-- $this->parser->log('Optimised number: Changed "'.$this->sub_value.'" to "'.$temp.'"','Information');
-- }
-- $this->sub_value = $temp;
-- }
-- if($this->parser->get_cfg('compress_colors'))
-- {
-- $temp = $this->cut_color($this->sub_value);
-- if($temp !== $this->sub_value)
-- {
-- if(isset($replace_colors[$this->sub_value])) {
-- $this->parser->log('Fixed invalid color name: Changed "'.$this->sub_value.'" to "'.$temp.'"','Warning');
-- } else {
-- $this->parser->log('Optimised color: Changed "'.$this->sub_value.'" to "'.$temp.'"','Information');
-- }
-- $this->sub_value = $temp;
-- }
-- }
-- }
--
-- /**
-- * Compresses shorthand values. Example: margin:1px 1px 1px 1px -> margin:1px
-- * @param string $value
-- * @access public
-- * @return string
-- * @version 1.0
-- */
-- function shorthand($value)
-- {
-- $important = '';
-- if(csstidy::is_important($value))
-- {
-- $values = csstidy::gvw_important($value);
-- $important = ' !important';
-- }
-- else $values = $value;
--
-- $values = explode(' ',$values);
-- switch(count($values))
-- {
-- case 4:
-- if($values[0] == $values[1] && $values[0] == $values[2] && $values[0] == $values[3])
-- {
-- return $values[0].$important;
-- }
-- elseif($values[1] == $values[3] && $values[0] == $values[2])
-- {
-- return $values[0].' '.$values[1].$important;
-- }
-- elseif($values[1] == $values[3])
-- {
-- return $values[0].' '.$values[1].' '.$values[2].$important;
-- }
-- break;
--
-- case 3:
-- if($values[0] == $values[1] && $values[0] == $values[2])
-- {
-- return $values[0].$important;
-- }
-- elseif($values[0] == $values[2])
-- {
-- return $values[0].' '.$values[1].$important;
-- }
-- break;
--
-- case 2:
-- if($values[0] == $values[1])
-- {
-- return $values[0].$important;
-- }
-- break;
-- }
--
-- return $value;
-- }
--
-- /**
-- * Removes unnecessary whitespace in ! important
-- * @param string $string
-- * @return string
-- * @access public
-- * @version 1.1
-- */
-- function compress_important(&$string)
-- {
-- if(csstidy::is_important($string))
-- {
-- $string = csstidy::gvw_important($string) . ' !important';
-- }
-- return $string;
-- }
--
-- /**
-- * Color compression function. Converts all rgb() values to #-values and uses the short-form if possible. Also replaces 4 color names by #-values.
-- * @param string $color
-- * @return string
-- * @version 1.1
-- */
-- function cut_color($color)
-- {
-- $replace_colors =& $GLOBALS['csstidy']['replace_colors'];
--
-- // rgb(0,0,0) -> #000000 (or #000 in this case later)
-- if(strtolower(substr($color,0,4)) == 'rgb(')
-- {
-- $color_tmp = substr($color,4,strlen($color)-5);
-- $color_tmp = explode(',',$color_tmp);
-- for ( $i = 0; $i < count($color_tmp); $i++ )
-- {
-- $color_tmp[$i] = trim ($color_tmp[$i]);
-- if(substr($color_tmp[$i],-1) == '%')
-- {
-- $color_tmp[$i] = round((255*$color_tmp[$i])/100);
-- }
-- if($color_tmp[$i]>255) $color_tmp[$i] = 255;
-- }
-- $color = '#';
-- for ($i = 0; $i < 3; $i++ )
-- {
-- if($color_tmp[$i]<16) {
-- $color .= '0' . dechex($color_tmp[$i]);
-- } else {
-- $color .= dechex($color_tmp[$i]);
-- }
-- }
-- }
--
-- // Fix bad color names
-- if(isset($replace_colors[strtolower($color)]))
-- {
-- $color = $replace_colors[strtolower($color)];
-- }
--
-- // #aabbcc -> #abc
-- if(strlen($color) == 7)
-- {
-- $color_temp = strtolower($color);
-- if($color_temp{0} == '#' && $color_temp{1} == $color_temp{2} && $color_temp{3} == $color_temp{4} && $color_temp{5} == $color_temp{6})
-- {
-- $color = '#'.$color{1}.$color{3}.$color{5};
-- }
-- }
--
-- switch(strtolower($color))
-- {
-- /* color name -> hex code */
-- case 'black': return '#000';
-- case 'fuchsia': return '#F0F';
-- case 'white': return '#FFF';
-- case 'yellow': return '#FF0';
--
-- /* hex code -> color name */
-- case '#800000': return 'maroon';
-- case '#ffa500': return 'orange';
-- case '#808000': return 'olive';
-- case '#800080': return 'purple';
-- case '#008000': return 'green';
-- case '#000080': return 'navy';
-- case '#008080': return 'teal';
-- case '#c0c0c0': return 'silver';
-- case '#808080': return 'gray';
-- case '#f00': return 'red';
-- }
--
-- return $color;
-- }
--
-- /**
-- * Compresses numbers (ie. 1.0 becomes 1 or 1.100 becomes 1.1 )
-- * @param string $subvalue
-- * @return string
-- * @version 1.2
-- */
-- function compress_numbers($subvalue)
-- {
-- $units =& $GLOBALS['csstidy']['units'];
-- $number_values =& $GLOBALS['csstidy']['number_values'];
-- $color_values =& $GLOBALS['csstidy']['color_values'];
--
-- // for font:1em/1em sans-serif...;
-- if($this->property == 'font')
-- {
-- $temp = explode('/',$subvalue);
-- }
-- else
-- {
-- $temp = array($subvalue);
-- }
-- for ($l = 0; $l < count($temp); $l++)
-- {
-- // continue if no numeric value
-- if (!(strlen($temp[$l]) > 0 && ( is_numeric($temp[$l]{0}) || $temp[$l]{0} == '+' || $temp[$l]{0} == '-' ) ))
-- {
-- continue;
-- }
--
-- // Fix bad colors
-- if (in_array($this->property, $color_values))
-- {
-- $temp[$l] = '#'.$temp[$l];
-- }
--
-- if (floatval($temp[$l]) == 0)
-- {
-- $temp[$l] = '0';
-- }
-- else
-- {
-- $unit_found = FALSE;
-- for ($m = 0, $size_4 = count($units); $m < $size_4; $m++)
-- {
-- if (strpos(strtolower($temp[$l]),$units[$m]) !== FALSE)
-- {
-- $temp[$l] = floatval($temp[$l]).$units[$m];
-- $unit_found = TRUE;
-- break;
-- }
-- }
-- if (!$unit_found && !in_array($this->property,$number_values,TRUE))
-- {
-- $temp[$l] = floatval($temp[$l]).'px';
-- }
-- else if (!$unit_found)
-- {
-- $temp[$l] = floatval($temp[$l]);
-- }
-- }
-- }
--
-- return ((count($temp) > 1) ? $temp[0].'/'.$temp[1] : $temp[0]);
-- }
--
-- /**
-- * Merges selectors with same properties. Example: a{color:red} b{color:red} -> a,b{color:red}
-- * Very basic and has at least one bug. Hopefully there is a replacement soon.
-- * @param array $array
-- * @return array
-- * @access public
-- * @version 1.2
-- */
-- function merge_selectors(&$array)
-- {
-- $css = $array;
-- foreach($css as $key => $value)
-- {
-- if(!isset($css[$key]))
-- {
-- continue;
-- }
-- $newsel = '';
--
-- // Check if properties also exist in another selector
-- $keys = array();
-- // PHP bug (?) without $css = $array; here
-- foreach($css as $selector => $vali)
-- {
-- if($selector == $key)
-- {
-- continue;
-- }
--
-- if($css[$key] === $vali)
-- {
-- $keys[] = $selector;
-- }
-- }
--
-- if(!empty($keys))
-- {
-- $newsel = $key;
-- unset($css[$key]);
-- foreach($keys as $selector)
-- {
-- unset($css[$selector]);
-- $newsel .= ','.$selector;
-- }
-- $css[$newsel] = $value;
-- }
-- }
-- $array = $css;
-- }
--
-- /**
-- * Dissolves properties like padding:10px 10px 10px to padding-top:10px;padding-bottom:10px;...
-- * @param string $property
-- * @param string $value
-- * @return array
-- * @version 1.0
-- * @see merge_4value_shorthands()
-- */
-- function dissolve_4value_shorthands($property,$value)
-- {
-- $shorthands =& $GLOBALS['csstidy']['shorthands'];
-- if(!is_array($shorthands[$property]))
-- {
-- $return[$property] = $value;
-- return $return;
-- }
--
-- $important = '';
-- if(csstidy::is_important($value))
-- {
-- $value = csstidy::gvw_important($value);
-- $important = ' !important';
-- }
-- $values = explode(' ',$value);
--
--
-- $return = array();
-- if(count($values) == 4)
-- {
-- for($i=0;$i<4;$i++)
-- {
-- $return[$shorthands[$property][$i]] = $values[$i].$important;
-- }
-- }
-- elseif(count($values) == 3)
-- {
-- $return[$shorthands[$property][0]] = $values[0].$important;
-- $return[$shorthands[$property][1]] = $values[1].$important;
-- $return[$shorthands[$property][3]] = $values[1].$important;
-- $return[$shorthands[$property][2]] = $values[2].$important;
-- }
-- elseif(count($values) == 2)
-- {
-- for($i=0;$i<4;$i++)
-- {
-- $return[$shorthands[$property][$i]] = (($i % 2 != 0)) ? $values[1].$important : $values[0].$important;
-- }
-- }
-- else
-- {
-- for($i=0;$i<4;$i++)
-- {
-- $return[$shorthands[$property][$i]] = $values[0].$important;
-- }
-- }
--
-- return $return;
-- }
--
-- /**
-- * Explodes a string as explode() does, however, not if $sep is escaped or within a string.
-- * @param string $sep seperator
-- * @param string $string
-- * @return array
-- * @version 1.0
-- */
-- function explode_ws($sep,$string)
-- {
-- $status = 'st';
-- $to = '';
--
-- $output = array();
-- $num = 0;
-- for($i = 0, $len = strlen($string);$i < $len; $i++)
-- {
-- switch($status)
-- {
-- case 'st':
-- if($string{$i} == $sep && !csstidy::escaped($string,$i))
-- {
-- ++$num;
-- }
-- elseif($string{$i} == '"' || $string{$i} == '\'' || $string{$i} == '(' && !csstidy::escaped($string,$i))
-- {
-- $status = 'str';
-- $to = ($string{$i} == '(') ? ')' : $string{$i};
-- (isset($output[$num])) ? $output[$num] .= $string{$i} : $output[$num] = $string{$i};
-- }
-- else
-- {
-- (isset($output[$num])) ? $output[$num] .= $string{$i} : $output[$num] = $string{$i};
-- }
-- break;
--
-- case 'str':
-- if($string{$i} == $to && !csstidy::escaped($string,$i))
-- {
-- $status = 'st';
-- }
-- (isset($output[$num])) ? $output[$num] .= $string{$i} : $output[$num] = $string{$i};
-- break;
-- }
-- }
--
-- if(isset($output[0]))
-- {
-- return $output;
-- }
-- else
-- {
-- return array($output);
-- }
-- }
--
-- /**
-- * Merges Shorthand properties again, the opposite of dissolve_4value_shorthands()
-- * @param array $array
-- * @return array
-- * @version 1.2
-- * @see dissolve_4value_shorthands()
-- */
-- function merge_4value_shorthands($array)
-- {
-- $return = $array;
-- $shorthands =& $GLOBALS['csstidy']['shorthands'];
--
-- foreach($shorthands as $key => $value)
-- {
-- if(isset($array[$value[0]]) && isset($array[$value[1]])
-- && isset($array[$value[2]]) && isset($array[$value[3]]) && $value !== 0)
-- {
-- $return[$key] = '';
--
-- $important = '';
-- for($i = 0; $i < 4; $i++)
-- {
-- $val = $array[$value[$i]];
-- if(csstidy::is_important($val))
-- {
-- $important = '!important';
-- $return[$key] .= csstidy::gvw_important($val).' ';
-- }
-- else
-- {
-- $return[$key] .= $val.' ';
-- }
-- unset($return[$value[$i]]);
-- }
-- $return[$key] = csstidy_optimise::shorthand(trim($return[$key].$important));
-- }
-- }
-- return $return;
-- }
--
-- /**
-- * Dissolve background property
-- * @param string $str_value
-- * @return array
-- * @version 1.0
-- * @see merge_bg()
-- * @todo full CSS 3 compliance
-- */
-- function dissolve_short_bg($str_value)
-- {
-- $background_prop_default =& $GLOBALS['csstidy']['background_prop_default'];
-- $repeat = array('repeat','repeat-x','repeat-y','no-repeat','space');
-- $attachment = array('scroll','fixed','local');
-- $clip = array('border','padding');
-- $origin = array('border','padding','content');
-- $pos = array('top','center','bottom','left','right');
-- $important = '';
-- $return = array('background-image' => NULL,'background-size' => NULL,'background-repeat' => NULL,'background-position' => NULL,'background-attachment'=>NULL,'background-clip' => NULL,'background-origin' => NULL,'background-color' => NULL);
--
-- if(csstidy::is_important($str_value))
-- {
-- $important = ' !important';
-- $str_value = csstidy::gvw_important($str_value);
-- }
--
-- $str_value = csstidy_optimise::explode_ws(',',$str_value);
-- for($i = 0; $i < count($str_value); $i++)
-- {
-- $have['clip'] = FALSE; $have['pos'] = FALSE;
-- $have['color'] = FALSE; $have['bg'] = FALSE;
--
-- $str_value[$i] = csstidy_optimise::explode_ws(' ',trim($str_value[$i]));
--
-- for($j = 0; $j < count($str_value[$i]); $j++)
-- {
-- if($have['bg'] === FALSE && (substr($str_value[$i][$j],0,4) == 'url(' || $str_value[$i][$j] === 'none'))
-- {
-- $return['background-image'] .= $str_value[$i][$j].',';
-- $have['bg'] = TRUE;
-- }
-- elseif(in_array($str_value[$i][$j],$repeat,TRUE))
-- {
-- $return['background-repeat'] .= $str_value[$i][$j].',';
-- }
-- elseif(in_array($str_value[$i][$j],$attachment,TRUE))
-- {
-- $return['background-attachment'] .= $str_value[$i][$j].',';
-- }
-- elseif(in_array($str_value[$i][$j],$clip,TRUE) && !$have['clip'])
-- {
-- $return['background-clip'] .= $str_value[$i][$j].',';
-- $have['clip'] = TRUE;
-- }
-- elseif(in_array($str_value[$i][$j],$origin,TRUE))
-- {
-- $return['background-origin'] .= $str_value[$i][$j].',';
-- }
-- elseif($str_value[$i][$j]{0} == '(')
-- {
-- $return['background-size'] .= substr($str_value[$i][$j],1,-1).',';
-- }
-- elseif(in_array($str_value[$i][$j],$pos,TRUE) || is_numeric($str_value[$i][$j]{0}) || $str_value[$i][$j]{0} === NULL)
-- {
-- $return['background-position'] .= $str_value[$i][$j];
-- if(!$have['pos']) $return['background-position'] .= ' '; else $return['background-position'].= ',';
-- $have['pos'] = TRUE;
-- }
-- elseif(!$have['color'])
-- {
-- $return['background-color'] .= $str_value[$i][$j].',';
-- $have['color'] = TRUE;
-- }
-- }
-- }
--
-- foreach($background_prop_default as $bg_prop => $default_value)
-- {
-- if($return[$bg_prop] !== NULL)
-- {
-- $return[$bg_prop] = substr($return[$bg_prop],0,-1).$important;
-- }
-- else $return[$bg_prop] = $default_value.$important;
-- }
-- return $return;
-- }
--
-- /**
-- * Merges all background properties
-- * @param array $input_css
-- * @return array
-- * @version 1.0
-- * @see dissolve_short_bg()
-- * @todo full CSS 3 compliance
-- */
-- function merge_bg($input_css)
-- {
-- $background_prop_default =& $GLOBALS['csstidy']['background_prop_default'];
-- // Max number of background images. CSS3 not yet fully implemented
-- $number_of_values = @max(count(csstidy_optimise::explode_ws(',',$input_css['background-image'])),count(csstidy_optimise::explode_ws(',',$input_css['background-color'])),1);
-- // Array with background images to check if BG image exists
-- $bg_img_array = @csstidy_optimise::explode_ws(',',csstidy::gvw_important($input_css['background-image']));
-- $new_bg_value = '';
-- $important = '';
--
-- for($i = 0; $i < $number_of_values; $i++)
-- {
-- foreach($background_prop_default as $bg_property => $default_value)
-- {
-- // Skip if property does not exist
-- if(!isset($input_css[$bg_property]))
-- {
-- continue;
-- }
--
-- $cur_value = $input_css[$bg_property];
--
-- // Skip some properties if there is no background image
-- if((!isset($bg_img_array[$i]) || $bg_img_array[$i] === 'none')
-- && ($bg_property === 'background-size' || $bg_property === 'background-position'
-- || $bg_property === 'background-attachment' || $bg_property === 'background-repeat'))
-- {
-- continue;
-- }
--
-- // Remove !important
-- if(csstidy::is_important($cur_value))
-- {
-- $important = ' !important';
-- $cur_value = csstidy::gvw_important($cur_value);
-- }
--
-- // Do not add default values
-- if($cur_value === $default_value)
-- {
-- continue;
-- }
--
-- $temp = csstidy_optimise::explode_ws(',',$cur_value);
--
-- if(isset($temp[$i]))
-- {
-- if($bg_property == 'background-size')
-- {
-- $new_bg_value .= '('.$temp[$i].') ';
-- }
-- else
-- {
-- $new_bg_value .= $temp[$i].' ';
-- }
-- }
-- }
--
-- $new_bg_value = trim($new_bg_value);
-- if($i != $number_of_values-1) $new_bg_value .= ',';
-- }
--
-- // Delete all background-properties
-- foreach($background_prop_default as $bg_property => $default_value)
-- {
-- unset($input_css[$bg_property]);
-- }
--
-- // Add new background property
-- if($new_bg_value !== '') $input_css['background'] = $new_bg_value.$important;
--
-- return $input_css;
-- }
-- }
-- ?>
-
