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class.csstidy_optimise.php
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<?php
/**
* CSSTidy - CSS Parser and Optimiser
*
* CSS Optimising Class
* This class optimises CSS data generated by csstidy.
*
* Copyright 2005, 2006, 2007 Florian Schmitz
*
* This file is part of CSSTidy.
*
* CSSTidy is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @license http://opensource.org/licenses/lgpl-license.php GNU Lesser General Public License
* @package csstidy
* @author Florian Schmitz (floele at gmail dot com) 2005-2007
* @author Brett Zamir (brettz9 at yahoo dot com) 2007
* @author Nikolay Matsievsky (speed at webo dot name) 2009-2010
* @author Cedric Morin (cedric at yterium dot com) 2010-2012
*/
/**
* 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 {
/**
* csstidy object
* @var object
*/
public $parser;
public $css;
public $sub_value;
public $at;
public $selector;
public $property;
public $value;
/**
* Constructor
* @param csstidy $css contains the class csstidy
* @access private
* @version 1.0
*/
public function __construct($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 $css after parsing
* @access public
* @version 1.0
*/
public function postparse() {
if ($this->parser->get_cfg('reverse_left_and_right') > 0) {
foreach ($this->css as $medium => $selectors) {
if (is_array($selectors)) {
foreach ($selectors as $selector => $properties) {
$this->css[$medium][$selector] = $this->reverse_left_and_right($this->css[$medium][$selector]);
}
}
}
}
if ($this->parser->get_cfg('preserve_css')) {
return;
}
if ((int)$this->parser->get_cfg('merge_selectors') === 2) {
foreach ($this->css as $medium => $value) {
if (is_array($value)) {
$this->merge_selectors($this->css[$medium]);
}
}
}
if ($this->parser->get_cfg('discard_invalid_selectors')) {
foreach ($this->css as $medium => $value) {
if (is_array($value)) {
$this->discard_invalid_selectors($this->css[$medium]);
}
}
}
if ($this->parser->get_cfg('optimise_shorthands') > 0) {
foreach ($this->css as $medium => $value) {
if (is_array($value)) {
foreach ($value as $selector => $value1) {
$this->css[$medium][$selector] = $this->merge_4value_shorthands($this->css[$medium][$selector]);
$this->css[$medium][$selector] = $this->merge_4value_radius_shorthands($this->css[$medium][$selector]);
if ($this->parser->get_cfg('optimise_shorthands') < 2) {
continue;
}
$this->css[$medium][$selector] = $this->merge_font($this->css[$medium][$selector]);
if ($this->parser->get_cfg('optimise_shorthands') < 3) {
continue;
}
$this->css[$medium][$selector] = $this->merge_bg($this->css[$medium][$selector]);
if (empty($this->css[$medium][$selector])) {
unset($this->css[$medium][$selector]);
}
}
}
}
}
}
/**
* Optimises values
* @access public
* @version 1.0
*/
public function value() {
$shorthands = & $this->parser->data['csstidy']['shorthands'];
// optimise shorthand properties
if (isset($shorthands[$this->property])) {
$temp = $this->shorthand($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
*/
public function shorthands() {
$shorthands = & $this->parser->data['csstidy']['shorthands'];
if (!$this->parser->get_cfg('optimise_shorthands') || $this->parser->get_cfg('preserve_css')) {
return;
}
if ($this->property === 'font' && $this->parser->get_cfg('optimise_shorthands') > 1) {
$this->css[$this->at][$this->selector]['font']='';
$this->parser->merge_css_blocks($this->at, $this->selector, $this->dissolve_short_font($this->value));
}
if ($this->property === 'background' && $this->parser->get_cfg('optimise_shorthands') > 2) {
$this->css[$this->at][$this->selector]['background']='';
$this->parser->merge_css_blocks($this->at, $this->selector, $this->dissolve_short_bg($this->value));
}
if (isset($shorthands[$this->property])) {
$this->parser->merge_css_blocks($this->at, $this->selector, $this->dissolve_4value_shorthands($this->property, $this->value));
if (is_array($shorthands[$this->property])) {
$this->css[$this->at][$this->selector][$this->property] = '';
}
}
}
/**
* Optimises a sub-value
* @access public
* @version 1.0
*/
public function subvalue() {
$replace_colors = & $this->parser->data['csstidy']['replace_colors'];
$this->sub_value = trim($this->sub_value);
if ($this->sub_value == '') { // caution : '0'
return;
}
$important = '';
if ($this->parser->is_important($this->sub_value)) {
$important = '!important';
}
$this->sub_value = $this->parser->gvw_important($this->sub_value);
// Compress font-weight
if ($this->property === 'font-weight' && $this->parser->get_cfg('compress_font-weight')) {
if ($this->sub_value === 'bold') {
$this->sub_value = '700';
$this->parser->log('Optimised font-weight: Changed "bold" to "700"', 'Information');
} elseif ($this->sub_value === 'normal') {
$this->sub_value = '400';
$this->parser->log('Optimised font-weight: Changed "normal" to "400"', 'Information');
}
}
$temp = $this->compress_numbers($this->sub_value);
if (strcasecmp($temp, $this->sub_value) !== 0) {
if (strlen($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;
}
}
$this->sub_value .= $important;
}
/**
* Compresses shorthand values. Example: margin:1px 1px 1px 1px -> margin:1px
* @param string $value
* @access public
* @return string
* @version 1.0
*/
public function shorthand($value) {
$important = '';
if ($this->parser->is_important($value)) {
$values = $this->parser->gvw_important($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 $string
* @return string
* @access public
* @version 1.1
*/
public function compress_important(&$string) {
if ($this->parser->is_important($string)) {
$important = $this->parser->get_cfg('space_before_important') ? ' !important' : '!important';
$string = $this->parser->gvw_important($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 $color
* @return string
* @version 1.1
*/
public function cut_color($color) {
$replace_colors = & $this->parser->data['csstidy']['replace_colors'];
// if it's a string, don't touch !
if (strncmp($color, "'", 1) == 0 || strncmp($color, '"', 1) == 0)
return $color;
/* expressions complexes de type gradient */
if (strpos($color, '(') !== false
&& (strncasecmp($color, 'rgb(' ,4) !== 0 and strncasecmp($color, 'rgba(' ,5) !== 0)) {
// on ne touche pas aux couleurs dans les expression ms, c'est trop sensible
if (stripos($color, 'progid:') !== false)
return $color;
preg_match_all(",rgba?\([^)]+\),i", $color, $matches, PREG_SET_ORDER);
if (count($matches)) {
foreach ($matches as $m) {
$color = str_replace($m[0], $this->cut_color($m[0]), $color);
}
}
preg_match_all(",#[0-9a-f]{6}(?=[^0-9a-f]),i", $color, $matches, PREG_SET_ORDER);
if (count($matches)) {
foreach ($matches as $m) {
$color = str_replace($m[0],$this->cut_color($m[0]), $color);
}
}
return $color;
}
// rgb(0,0,0) -> #000000 (or #000 in this case later)
if (
// be sure to not corrupt a rgb with calc() value
(strncasecmp($color, 'rgb(', 4)==0 and strpos($color, '(', 4) === false)
or (strncasecmp($color, 'rgba(', 5)==0 and strpos($color, '(', 5) === false)
){
$color_tmp = explode('(', $color, 2);
$color_tmp = rtrim(end($color_tmp), ')');
if (strpos($color_tmp, '/') !== false) {
$color_tmp = explode('/', $color_tmp, 2);
$color_parts = explode(' ', trim(reset($color_tmp)), 3);
while (count($color_parts) < 3) {
$color_parts[] = 0;
}
$color_parts[] = end($color_tmp);
}
else {
$color_parts = explode(',', $color_tmp, 4);
}
for ($i = 0; $i < count($color_parts); $i++) {
$color_parts[$i] = trim($color_parts[$i]);
if (substr($color_parts[$i], -1) === '%') {
$color_parts[$i] = round((255 * intval($color_parts[$i])) / 100);
} elseif ($i>2) {
// 4th argument is alpga layer between 0 and 1 (if not %)
$color_parts[$i] = round((255 * floatval($color_parts[$i])));
}
$color_parts[$i] = intval($color_parts[$i]);
if ($color_parts[$i] > 255){
$color_parts[$i] = 255;
}
}
$color = '#';
// 3 or 4 parts depending on alpha layer
$nb = min(max(count($color_parts), 3),4);
for ($i = 0; $i < $nb; $i++) {
if (!isset($color_parts[$i])) {
$color_parts[$i] = 0;
}
if ($color_parts[$i] < 16) {
$color .= '0' . dechex($color_parts[$i]);
} else {
$color .= dechex($color_parts[$i]);
}
}
}
// Fix bad color names
if (isset($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] . $color[5];
}
}
// #aabbccdd -> #abcd
elseif (strlen($color) == 9) {
$color_temp = strtolower($color);
if ($color_temp[0] === '#' && $color_temp[1] == $color_temp[2] && $color_temp[3] == $color_temp[4] && $color_temp[5] == $color_temp[6] && $color_temp[7] == $color_temp[8]) {
$color = '#' . $color[1] . $color[3] . $color[5] . $color[7];
}
}
switch (strtolower($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 $subvalue
* @return string
* @version 1.2
*/
public function compress_numbers($subvalue) {
$unit_values = & $this->parser->data['csstidy']['unit_values'];
$color_values = & $this->parser->data['csstidy']['color_values'];
// for font:1em/1em sans-serif...;
if ($this->property === 'font') {
$temp = explode('/', $subvalue);
} else {
$temp = array($subvalue);
}
for ($l = 0; $l < count($temp); $l++) {
// if we are not dealing with a number at this point, do not optimise anything
$number = $this->AnalyseCssNumber($temp[$l]);
if ($number === false) {
return $subvalue;
}
// Fix bad colors
if (in_array($this->property, $color_values)) {
$temp[$l] = '#' . $temp[$l];
continue;
}
if (abs($number[0]) > 0) {
if ($number[1] == '' && in_array($this->property, $unit_values, true)) {
$number[1] = 'px';
}
} elseif ($number[1] != 's' && $number[1] != 'ms') {
$number[1] = '';
}
$temp[$l] = $number[0] . $number[1];
}
return ((count($temp) > 1) ? $temp[0] . '/' . $temp[1] : $temp[0]);
}
/**
* Checks if a given string is a CSS valid number. If it is,
* an array containing the value and unit is returned
* @param string $string
* @return array|false ('unit' if unit is found or '' if no unit exists, number value) or false if no number
*/
public function AnalyseCssNumber($string) {
// most simple checks first
if (strlen($string) == 0 || ctype_alpha($string[0])) {
return false;
}
$units = & $this->parser->data['csstidy']['units'];
$return = array(0, '');
$return[0] = floatval($string);
if (abs($return[0]) > 0 && abs($return[0]) < 1) {
if ($return[0] < 0) {
$return[0] = '-' . ltrim(substr($return[0], 1), '0');
} else {
$return[0] = ltrim($return[0], '0');
}
}
// Look for unit and split from value if exists
foreach ($units as $unit) {
$expectUnitAt = strlen($string) - strlen($unit);
if (!($unitInString = stristr($string, $unit))) { // mb_strpos() fails with "false"
continue;
}
$actualPosition = strpos($string, $unitInString);
if ($expectUnitAt === $actualPosition) {
$return[1] = $unit;
$string = substr($string, 0, - strlen($unit));
break;
}
}
if (!is_numeric($string)) {
return false;
}
return $return;
}
/**
* 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 $array
* @return void
* @access public
* @version 1.2
*/
public function merge_selectors(&$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 = $css;
}
/**
* Removes invalid selectors and their corresponding rule-sets as
* defined by 4.1.7 in REC-CSS2. This is a very rudimentary check
* and should be replaced by a full-blown parsing algorithm or
* regular expression
* @version 1.4
*/
public function discard_invalid_selectors(&$array) {
$invalid = array('+' => true, '~' => true, ',' => true, '>' => true);
foreach ($array as $selector => $decls) {
$ok = true;
$selectors = array_map('trim', explode(',', $selector));
foreach ($selectors as $s) {
$simple_selectors = preg_split('/\s*[+>~\s]\s*/', $s);
foreach ($simple_selectors as $ss) {
if ($ss === '')
$ok = false;
// could also check $ss for internal structure,
// but that probably would be too slow
}
}
if (!$ok)
unset($array[$selector]);
}
}
/**
* Dissolves properties like padding:10px 10px 10px to padding-top:10px;padding-bottom:10px;...
* @param string $property
* @param string $value
* @param array|null $shorthands
* @return array
* @version 1.0
* @see merge_4value_shorthands()
*/
public function dissolve_4value_shorthands($property, $value, $shorthands = null) {
if (is_null($shorthands)) {
$shorthands = & $this->parser->data['csstidy']['shorthands'];
}
if (!is_array($shorthands[$property])) {
$return[$property] = $value;
return $return;
}
$important = '';
if ($this->parser->is_important($value)) {
$value = $this->parser->gvw_important($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;
}
/**
* Dissolves radius properties like
* border-radius:10px 10px 10px / 1px 2px
* to border-top-left:10px 1px;border-top-right:10px 2x;...
* @param string $property
* @param string $value
* @return array
* @version 1.0
* @uses dissolve_4value_shorthands()
* @see merge_4value_radius_shorthands()
*/
public function dissolve_4value_radius_shorthands($property, $value) {
$shorthands = & $this->parser->data['csstidy']['radius_shorthands'];
if (!is_array($shorthands[$property])) {
$return[$property] = $value;
return $return;
}
if (strpos($value, '/') !== false) {
$values = $this->explode_ws('/', $value);
if (count($values) == 2) {
$r[0] = $this->dissolve_4value_shorthands($property, trim($values[0]), $shorthands);
$r[1] = $this->dissolve_4value_shorthands($property, trim($values[1]), $shorthands);
$return = array();
foreach ($r[0] as $p=>$v) {
$return[$p] = $v;
if ($r[1][$p] !== $v) {
$return[$p] .= ' ' . $r[1][$p];
}
}
return $return;
}
}
$return = $this->dissolve_4value_shorthands($property, $value, $shorthands);
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
* @param bool $explode_in_parenthesis
* @return array
* @version 1.0
*/
public function explode_ws($sep, $string, $explode_in_parenthesis = false) {
$status = 'st';
$to = '';
$output = array(
0 => '',
);
$num = 0;
for ($i = 0, $len = strlen($string); $i < $len; $i++) {
switch ($status) {
case 'st':
if ($string[$i] == $sep && !$this->parser->escaped($string, $i)) {
++$num;
} elseif ($string[$i] === '"' || $string[$i] === '\'' || (!$explode_in_parenthesis && $string[$i] === '(') && !$this->parser->escaped($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] == $to && !$this->parser->escaped($string, $i)) {
$status = 'st';
}
(isset($output[$num])) ? $output[$num] .= $string[$i] : $output[$num] = $string[$i];
break;
}
}
return $output;
}
/**
* Merges Shorthand properties again, the opposite of dissolve_4value_shorthands()
* @param array $array
* @param array|null $shorthands
* @return array
* @version 1.2
* @see dissolve_4value_shorthands()
*/
public function merge_4value_shorthands($array, $shorthands = null) {
$return = $array;
if (is_null($shorthands)) {
$shorthands = & $this->parser->data['csstidy']['shorthands'];
}
foreach ($shorthands as $key => $value) {
if ($value !== 0 && isset($array[$value[0]]) && isset($array[$value[1]])
&& isset($array[$value[2]]) && isset($array[$value[3]])) {
$return[$key] = '';
$important = '';
for ($i = 0; $i < 4; $i++) {
$val = $array[$value[$i]];
if ($this->parser->is_important($val)) {
$important = '!important';
$return[$key] .= $this->parser->gvw_important($val) . ' ';
} else {
$return[$key] .= $val . ' ';
}
unset($return[$value[$i]]);
}
$return[$key] = $this->shorthand(trim($return[$key] . $important));
}
}
return $return;
}
/**
* Merges Shorthand properties again, the opposite of dissolve_4value_shorthands()
* @param array $array
* @return array
* @version 1.2
* @uses merge_4value_shorthands()
* @see dissolve_4value_radius_shorthands()
*/
public function merge_4value_radius_shorthands($array) {
$return = $array;
$shorthands = & $this->parser->data['csstidy']['radius_shorthands'];
foreach ($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] = '';
$a = array();
for ($i = 0; $i < 4; $i++) {
$v = $this->explode_ws(' ', trim($array[$value[$i]]));
$a[0][$value[$i]] = reset($v);
$a[1][$value[$i]] = end($v);
}
$r = array();
$r[0] = $this->merge_4value_shorthands($a[0], $shorthands);
$r[1] = $this->merge_4value_shorthands($a[1], $shorthands);
if (isset($r[0][$key]) and isset($r[1][$key])) {
$return[$key] = $r[0][$key];
if ($r[1][$key] !== $r[0][$key]) {
$return[$key] .= ' / ' . $r[1][$key];
}
for ($i = 0; $i < 4; $i++) {
unset($return[$value[$i]]);
}
}
}
}
return $return;
}
/**
* Dissolve background property
* @param string $str_value
* @return array
* @version 1.0
* @see merge_bg()
* @todo full CSS 3 compliance
*/
public function dissolve_short_bg($str_value) {
// don't try to explose background gradient !
if (stripos($str_value, 'gradient(')!== false)
return array('background'=>$str_value);
$background_prop_default = & $this->parser->data['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 = '';
$return = array('background-image' => null, 'background-size' => null, 'background-repeat' => null, 'background-position' => null, 'background-attachment' => null, 'background-clip' => null, 'background-origin' => null, 'background-color' => null);
if ($this->parser->is_important($str_value)) {
$important = ' !important';
$str_value = $this->parser->gvw_important($str_value);
}
$str_value = $this->explode_ws(',', $str_value);
for ($i = 0; $i < count($str_value); $i++) {
$have['clip'] = false;
$have['pos'] = false;
$have['color'] = false;
$have['bg'] = false;
if (is_array($str_value[$i])) {
$str_value[$i] = $str_value[$i][0];
}
$str_value[$i] = $this->explode_ws(' ', trim($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 || $str_value[$i][$j][0] === '-' || $str_value[$i][$j][0] === '.') {
$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 $input_css
* @return array
* @version 1.0
* @see dissolve_short_bg()
* @todo full CSS 3 compliance
*/
public function merge_bg($input_css) {
$background_prop_default = & $this->parser->data['csstidy']['background_prop_default'];
// Max number of background images. CSS3 not yet fully implemented
$number_of_values = @max(count($this->explode_ws(',', $input_css['background-image'])), count($this->explode_ws(',', $input_css['background-color'])), 1);
// Array with background images to check if BG image exists
$bg_img_array = @$this->explode_ws(',', $this->parser->gvw_important($input_css['background-image']));
$new_bg_value = '';
$important = '';
// if background properties is here and not empty, don't try anything
if (isset($input_css['background']) && $input_css['background'])
return $input_css;
for ($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 all optimisation if gradient() somewhere
if (stripos($cur_value, 'gradient(') !== false)
return $input_css;
// Skip some properties if there is no background image
if ((!isset($bg_img_array[$i]) || $bg_img_array[$i] === 'none')
&& ($bg_property === 'background-size' || $bg_property === 'background-position'
|| $bg_property === 'background-attachment' || $bg_property === 'background-repeat')) {
continue;
}
// Remove !important
if ($this->parser->is_important($cur_value)) {
$important = ' !important';
$cur_value = $this->parser->gvw_important($cur_value);
}
// Do not add default values
if ($cur_value === $default_value) {
continue;
}
$temp = $this->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 . $important;
elseif(isset ($input_css['background']))
$input_css['background'] = 'none';
return $input_css;
}
/**
* Dissolve font property
* @param string $str_value
* @return array
* @version 1.3
* @see merge_font()
*/
public function dissolve_short_font($str_value) {
$font_prop_default = & $this->parser->data['csstidy']['font_prop_default'];
$font_weight = array('normal', 'bold', 'bolder', 'lighter', 100, 200, 300, 400, 500, 600, 700, 800, 900);
$font_variant = array('normal', 'small-caps');
$font_style = array('normal', 'italic', 'oblique');
$important = '';
$return = array('font-style' => null, 'font-variant' => null, 'font-weight' => null, 'font-size' => null, 'line-height' => null, 'font-family' => null);
if ($this->parser->is_important($str_value)) {
$important = '!important';
$str_value = $this->parser->gvw_important($str_value);
}
$have['style'] = false;
$have['variant'] = false;
$have['weight'] = false;
$have['size'] = false;
// Detects if font-family consists of several words w/o quotes
$multiwords = false;
// Workaround with multiple font-family
$str_value = $this->explode_ws(',', trim($str_value));
$str_value[0] = $this->explode_ws(' ', trim($str_value[0]));
for ($j = 0; $j < count($str_value[0]); $j++) {
if ($have['weight'] === false && in_array($str_value[0][$j], $font_weight)) {
$return['font-weight'] = $str_value[0][$j];
$have['weight'] = true;
} elseif ($have['variant'] === false && in_array($str_value[0][$j], $font_variant)) {
$return['font-variant'] = $str_value[0][$j];
$have['variant'] = true;
} elseif ($have['style'] === false && in_array($str_value[0][$j], $font_style)) {
$return['font-style'] = $str_value[0][$j];
$have['style'] = true;
} elseif ($have['size'] === false && (is_numeric($str_value[0][$j][0]) || $str_value[0][$j][0] === null || $str_value[0][$j][0] === '.')) {
$size = $this->explode_ws('/', trim($str_value[0][$j]));
$return['font-size'] = $size[0];
if (isset($size[1])) {
$return['line-height'] = $size[1];
} else {
$return['line-height'] = ''; // don't add 'normal' !
}
$have['size'] = true;
} else {
if (isset($return['font-family'])) {
$return['font-family'] .= ' ' . $str_value[0][$j];
$multiwords = true;
} else {