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source: spip-zone/_core_/plugins/compresseur/lib/csstidy/class.csstidy_optimise.php @ 63080

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Last change on this file since 63080 was 63080, checked in by cedric@…, 7 years ago
Remplacer l'external sur github qui marche pas bien partout par un import de la v1.4
File size: 28.9 KB

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1	<?php
2
3	/**
4	* CSSTidy - CSS Parser and Optimiser
5	*
6	* CSS Optimising Class
7	* This class optimises CSS data generated by csstidy.
8	*
9	* Copyright 2005, 2006, 2007 Florian Schmitz
10	*
11	* This file is part of CSSTidy.
12	*
13	* CSSTidy is free software; you can redistribute it and/or modify
14	* it under the terms of the GNU Lesser General Public License as published by
15	* the Free Software Foundation; either version 2.1 of the License, or
16	* (at your option) any later version.
17	*
18	* CSSTidy is distributed in the hope that it will be useful,
19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21	* GNU Lesser General Public License for more details.
22	*
23	* You should have received a copy of the GNU Lesser General Public License
24	* along with this program. If not, see <http://www.gnu.org/licenses/>.
25	*
26	* @license http://opensource.org/licenses/lgpl-license.php GNU Lesser General Public License
27	* @package csstidy
28	* @author Florian Schmitz (floele at gmail dot com) 2005-2007
29	* @author Brett Zamir (brettz9 at yahoo dot com) 2007
30	* @author Nikolay Matsievsky (speed at webo dot name) 2009-2010
31	* @author Cedric Morin (cedric at yterium dot com) 2010-2012
32	*/
33
34	/**
35	* CSS Optimising Class
36	*
37	* This class optimises CSS data generated by csstidy.
38	*
39	* @package csstidy
40	* @author Florian Schmitz (floele at gmail dot com) 2005-2006
41	* @version 1.0
42	*/
43	class csstidy_optimise {
44
45	/**
46	* Constructor
47	* @param array $css contains the class csstidy
48	* @access private
49	* @version 1.0
50	*/
51	function csstidy_optimise(&$css) {
52	$this->parser = & $css;
53	$this->css = & $css->css;
54	$this->sub_value = & $css->sub_value;
55	$this->at = & $css->at;
56	$this->selector = & $css->selector;
57	$this->property = & $css->property;
58	$this->value = & $css->value;
59	}
60
61	/**
62	* Optimises $css after parsing
63	* @access public
64	* @version 1.0
65	*/
66	function postparse() {
67	if ($this->parser->get_cfg('preserve_css')) {
68	return;
69	}
70
71	if ($this->parser->get_cfg('merge_selectors') === 2) {
72	foreach ($this->css as $medium => $value) {
73	$this->merge_selectors($this->css[$medium]);
74	}
75	}
76
77	if ($this->parser->get_cfg('discard_invalid_selectors')) {
78	foreach ($this->css as $medium => $value) {
79	$this->discard_invalid_selectors($this->css[$medium]);
80	}
81	}
82
83	if ($this->parser->get_cfg('optimise_shorthands') > 0) {
84	foreach ($this->css as $medium => $value) {
85	foreach ($value as $selector => $value1) {
86	$this->css[$medium][$selector] = csstidy_optimise::merge_4value_shorthands($this->css[$medium][$selector]);
87
88	if ($this->parser->get_cfg('optimise_shorthands') < 2) {
89	continue;
90	}
91
92	$this->css[$medium][$selector] = csstidy_optimise::merge_font($this->css[$medium][$selector]);
93
94	if ($this->parser->get_cfg('optimise_shorthands') < 3) {
95	continue;
96	}
97
98	$this->css[$medium][$selector] = csstidy_optimise::merge_bg($this->css[$medium][$selector]);
99	if (empty($this->css[$medium][$selector])) {
100	unset($this->css[$medium][$selector]);
101	}
102	}
103	}
104	}
105	}
106
107	/**
108	* Optimises values
109	* @access public
110	* @version 1.0
111	*/
112	function value() {
113	$shorthands = & $GLOBALS['csstidy']['shorthands'];
114
115	// optimise shorthand properties
116	if (isset($shorthands[$this->property])) {
117	$temp = csstidy_optimise::shorthand($this->value); // FIXME - move
118	if ($temp != $this->value) {
119	$this->parser->log('Optimised shorthand notation (' . $this->property . '): Changed "' . $this->value . '" to "' . $temp . '"', 'Information');
120	}
121	$this->value = $temp;
122	}
123
124	// Remove whitespace at ! important
125	if ($this->value != $this->compress_important($this->value)) {
126	$this->parser->log('Optimised !important', 'Information');
127	}
128	}
129
130	/**
131	* Optimises shorthands
132	* @access public
133	* @version 1.0
134	*/
135	function shorthands() {
136	$shorthands = & $GLOBALS['csstidy']['shorthands'];
137
138	if (!$this->parser->get_cfg('optimise_shorthands') \|\| $this->parser->get_cfg('preserve_css')) {
139	return;
140	}
141
142	if ($this->property === 'font' && $this->parser->get_cfg('optimise_shorthands') > 1) {
143	$this->css[$this->at][$this->selector]['font']='';
144	$this->parser->merge_css_blocks($this->at, $this->selector, csstidy_optimise::dissolve_short_font($this->value));
145	}
146	if ($this->property === 'background' && $this->parser->get_cfg('optimise_shorthands') > 2) {
147	$this->css[$this->at][$this->selector]['background']='';
148	$this->parser->merge_css_blocks($this->at, $this->selector, csstidy_optimise::dissolve_short_bg($this->value));
149	}
150	if (isset($shorthands[$this->property])) {
151	$this->parser->merge_css_blocks($this->at, $this->selector, csstidy_optimise::dissolve_4value_shorthands($this->property, $this->value));
152	if (is_array($shorthands[$this->property])) {
153	$this->css[$this->at][$this->selector][$this->property] = '';
154	}
155	}
156	}
157
158	/**
159	* Optimises a sub-value
160	* @access public
161	* @version 1.0
162	*/
163	function subvalue() {
164	$replace_colors = & $GLOBALS['csstidy']['replace_colors'];
165
166	$this->sub_value = trim($this->sub_value);
167	if ($this->sub_value == '') { // caution : '0'
168	return;
169	}
170
171	$important = '';
172	if (csstidy::is_important($this->sub_value)) {
173	$important = '!important';
174	}
175	$this->sub_value = csstidy::gvw_important($this->sub_value);
176
177	// Compress font-weight
178	if ($this->property === 'font-weight' && $this->parser->get_cfg('compress_font-weight')) {
179	if ($this->sub_value === 'bold') {
180	$this->sub_value = '700';
181	$this->parser->log('Optimised font-weight: Changed "bold" to "700"', 'Information');
182	} else if ($this->sub_value === 'normal') {
183	$this->sub_value = '400';
184	$this->parser->log('Optimised font-weight: Changed "normal" to "400"', 'Information');
185	}
186	}
187
188	$temp = $this->compress_numbers($this->sub_value);
189	if (strcasecmp($temp, $this->sub_value) !== 0) {
190	if (strlen($temp) > strlen($this->sub_value)) {
191	$this->parser->log('Fixed invalid number: Changed "' . $this->sub_value . '" to "' . $temp . '"', 'Warning');
192	} else {
193	$this->parser->log('Optimised number: Changed "' . $this->sub_value . '" to "' . $temp . '"', 'Information');
194	}
195	$this->sub_value = $temp;
196	}
197	if ($this->parser->get_cfg('compress_colors')) {
198	$temp = $this->cut_color($this->sub_value);
199	if ($temp !== $this->sub_value) {
200	if (isset($replace_colors[$this->sub_value])) {
201	$this->parser->log('Fixed invalid color name: Changed "' . $this->sub_value . '" to "' . $temp . '"', 'Warning');
202	} else {
203	$this->parser->log('Optimised color: Changed "' . $this->sub_value . '" to "' . $temp . '"', 'Information');
204	}
205	$this->sub_value = $temp;
206	}
207	}
208	$this->sub_value .= $important;
209	}
210
211	/**
212	* Compresses shorthand values. Example: margin:1px 1px 1px 1px -> margin:1px
213	* @param string $value
214	* @access public
215	* @return string
216	* @version 1.0
217	*/
218	function shorthand($value) {
219	$important = '';
220	if (csstidy::is_important($value)) {
221	$values = csstidy::gvw_important($value);
222	$important = '!important';
223	}
224	else
225	$values = $value;
226
227	$values = explode(' ', $values);
228	switch (count($values)) {
229	case 4:
230	if ($values[0] == $values[1] && $values[0] == $values[2] && $values[0] == $values[3]) {
231	return $values[0] . $important;
232	} elseif ($values[1] == $values[3] && $values[0] == $values[2]) {
233	return $values[0] . ' ' . $values[1] . $important;
234	} elseif ($values[1] == $values[3]) {
235	return $values[0] . ' ' . $values[1] . ' ' . $values[2] . $important;
236	}
237	break;
238
239	case 3:
240	if ($values[0] == $values[1] && $values[0] == $values[2]) {
241	return $values[0] . $important;
242	} elseif ($values[0] == $values[2]) {
243	return $values[0] . ' ' . $values[1] . $important;
244	}
245	break;
246
247	case 2:
248	if ($values[0] == $values[1]) {
249	return $values[0] . $important;
250	}
251	break;
252	}
253
254	return $value;
255	}
256
257	/**
258	* Removes unnecessary whitespace in ! important
259	* @param string $string
260	* @return string
261	* @access public
262	* @version 1.1
263	*/
264	function compress_important(&$string) {
265	if (csstidy::is_important($string)) {
266	$string = csstidy::gvw_important($string) . '!important';
267	}
268	return $string;
269	}
270
271	/**
272	* Color compression function. Converts all rgb() values to #-values and uses the short-form if possible. Also replaces 4 color names by #-values.
273	* @param string $color
274	* @return string
275	* @version 1.1
276	*/
277	function cut_color($color) {
278	$replace_colors = & $GLOBALS['csstidy']['replace_colors'];
279
280	// if it's a string, don't touch !
281	if (strncmp($color,"'",1)==0 OR strncmp($color,'"',1)==0)
282	return $color;
283
284	/* expressions complexes de type gradient */
285	if (strpos($color,"(")!==false AND strncmp($color,'rgb(',4)!=0){
286	// on ne touche pas aux couleurs dans les expression ms, c'est trop sensible
287	if (stripos($color,"progid:")!==false)
288	return $color;
289	preg_match_all(",rgb\([^)]+\),i",$color,$matches,PREG_SET_ORDER);
290	if (count($matches)){
291	foreach ($matches as $m){
292	$color = str_replace($m[0],$this->cut_color($m[0]),$color);
293	}
294	}
295	preg_match_all(",#[0-9a-f]{6}(?=[^0-9a-f]),i",$color,$matches,PREG_SET_ORDER);
296	if (count($matches)){
297	foreach ($matches as $m){
298	$color = str_replace($m[0],$this->cut_color($m[0]),$color);
299	}
300	}
301	return $color;
302	}
303
304	// rgb(0,0,0) -> #000000 (or #000 in this case later)
305	if (strncasecmp($color, 'rgb(', 4)==0) {
306	$color_tmp = substr($color, 4, strlen($color) - 5);
307	$color_tmp = explode(',', $color_tmp);
308	for ($i = 0; $i < count($color_tmp); $i++) {
309	$color_tmp[$i] = trim($color_tmp[$i]);
310	if (substr($color_tmp[$i], -1) === '%') {
311	$color_tmp[$i] = round((255 * $color_tmp[$i]) / 100);
312	}
313	if ($color_tmp[$i] > 255)
314	$color_tmp[$i] = 255;
315	}
316	$color = '#';
317	for ($i = 0; $i < 3; $i++) {
318	if ($color_tmp[$i] < 16) {
319	$color .= '0' . dechex($color_tmp[$i]);
320	} else {
321	$color .= dechex($color_tmp[$i]);
322	}
323	}
324	}
325
326	// Fix bad color names
327	if (isset($replace_colors[strtolower($color)])) {
328	$color = $replace_colors[strtolower($color)];
329	}
330
331	// #aabbcc -> #abc
332	if (strlen($color) == 7) {
333	$color_temp = strtolower($color);
334	if ($color_temp{0} === '#' && $color_temp{1} == $color_temp{2} && $color_temp{3} == $color_temp{4} && $color_temp{5} == $color_temp{6}) {
335	$color = '#' . $color{1} . $color{3} . $color{5};
336	}
337	}
338
339	switch (strtolower($color)) {
340	/* color name -> hex code */
341	case 'black': return '#000';
342	case 'fuchsia': return '#f0f';
343	case 'white': return '#fff';
344	case 'yellow': return '#ff0';
345
346	/* hex code -> color name */
347	case '#800000': return 'maroon';
348	case '#ffa500': return 'orange';
349	case '#808000': return 'olive';
350	case '#800080': return 'purple';
351	case '#008000': return 'green';
352	case '#000080': return 'navy';
353	case '#008080': return 'teal';
354	case '#c0c0c0': return 'silver';
355	case '#808080': return 'gray';
356	case '#f00': return 'red';
357	}
358
359	return $color;
360	}
361
362	/**
363	* Compresses numbers (ie. 1.0 becomes 1 or 1.100 becomes 1.1 )
364	* @param string $subvalue
365	* @return string
366	* @version 1.2
367	*/
368	function compress_numbers($subvalue) {
369	$unit_values = & $GLOBALS['csstidy']['unit_values'];
370	$color_values = & $GLOBALS['csstidy']['color_values'];
371
372	// for font:1em/1em sans-serif...;
373	if ($this->property === 'font') {
374	$temp = explode('/', $subvalue);
375	} else {
376	$temp = array($subvalue);
377	}
378	for ($l = 0; $l < count($temp); $l++) {
379	// if we are not dealing with a number at this point, do not optimise anything
380	$number = $this->AnalyseCssNumber($temp[$l]);
381	if ($number === false) {
382	return $subvalue;
383	}
384
385	// Fix bad colors
386	if (in_array($this->property, $color_values)) {
387	$temp[$l] = '#' . $temp[$l];
388	continue;
389	}
390
391	if (abs($number[0]) > 0) {
392	if ($number[1] == '' && in_array($this->property, $unit_values, true)) {
393	$number[1] = 'px';
394	}
395	} else {
396	$number[1] = '';
397	}
398
399	$temp[$l] = $number[0] . $number[1];
400	}
401
402	return ((count($temp) > 1) ? $temp[0] . '/' . $temp[1] : $temp[0]);
403	}
404
405	/**
406	* Checks if a given string is a CSS valid number. If it is,
407	* an array containing the value and unit is returned
408	* @param string $string
409	* @return array ('unit' if unit is found or '' if no unit exists, number value) or false if no number
410	*/
411	function AnalyseCssNumber($string) {
412	// most simple checks first
413	if (strlen($string) == 0 \|\| ctype_alpha($string{0})) {
414	return false;
415	}
416
417	$units = & $GLOBALS['csstidy']['units'];
418	$return = array(0, '');
419
420	$return[0] = floatval($string);
421	if (abs($return[0]) > 0 && abs($return[0]) < 1) {
422	if ($return[0] < 0) {
423	$return[0] = '-' . ltrim(substr($return[0], 1), '0');
424	} else {
425	$return[0] = ltrim($return[0], '0');
426	}
427	}
428
429	// Look for unit and split from value if exists
430	foreach ($units as $unit) {
431	$expectUnitAt = strlen($string) - strlen($unit);
432	if (!($unitInString = stristr($string, $unit))) { // mb_strpos() fails with "false"
433	continue;
434	}
435	$actualPosition = strpos($string, $unitInString);
436	if ($expectUnitAt === $actualPosition) {
437	$return[1] = $unit;
438	$string = substr($string, 0, - strlen($unit));
439	break;
440	}
441	}
442	if (!is_numeric($string)) {
443	return false;
444	}
445	return $return;
446	}
447
448	/**
449	* Merges selectors with same properties. Example: a{color:red} b{color:red} -> a,b{color:red}
450	* Very basic and has at least one bug. Hopefully there is a replacement soon.
451	* @param array $array
452	* @return array
453	* @access public
454	* @version 1.2
455	*/
456	function merge_selectors(&$array) {
457	$css = $array;
458	foreach ($css as $key => $value) {
459	if (!isset($css[$key])) {
460	continue;
461	}
462	$newsel = '';
463
464	// Check if properties also exist in another selector
465	$keys = array();
466	// PHP bug (?) without $css = $array; here
467	foreach ($css as $selector => $vali) {
468	if ($selector == $key) {
469	continue;
470	}
471
472	if ($css[$key] === $vali) {
473	$keys[] = $selector;
474	}
475	}
476
477	if (!empty($keys)) {
478	$newsel = $key;
479	unset($css[$key]);
480	foreach ($keys as $selector) {
481	unset($css[$selector]);
482	$newsel .= ',' . $selector;
483	}
484	$css[$newsel] = $value;
485	}
486	}
487	$array = $css;
488	}
489
490	/**
491	* Removes invalid selectors and their corresponding rule-sets as
492	* defined by 4.1.7 in REC-CSS2. This is a very rudimentary check
493	* and should be replaced by a full-blown parsing algorithm or
494	* regular expression
495	* @version 1.4
496	*/
497	function discard_invalid_selectors(&$array) {
498	$invalid = array('+' => true, '~' => true, ',' => true, '>' => true);
499	foreach ($array as $selector => $decls) {
500	$ok = true;
501	$selectors = array_map('trim', explode(',', $selector));
502	foreach ($selectors as $s) {
503	$simple_selectors = preg_split('/\s[+>~\s]\s/', $s);
504	foreach ($simple_selectors as $ss) {
505	if ($ss === '')
506	$ok = false;
507	// could also check $ss for internal structure,
508	// but that probably would be too slow
509	}
510	}
511	if (!$ok)
512	unset($array[$selector]);
513	}
514	}
515
516	/**
517	* Dissolves properties like padding:10px 10px 10px to padding-top:10px;padding-bottom:10px;...
518	* @param string $property
519	* @param string $value
520	* @return array
521	* @version 1.0
522	* @see merge_4value_shorthands()
523	*/
524	function dissolve_4value_shorthands($property, $value) {
525	$shorthands = & $GLOBALS['csstidy']['shorthands'];
526	if (!is_array($shorthands[$property])) {
527	$return[$property] = $value;
528	return $return;
529	}
530
531	$important = '';
532	if (csstidy::is_important($value)) {
533	$value = csstidy::gvw_important($value);
534	$important = '!important';
535	}
536	$values = explode(' ', $value);
537
538
539	$return = array();
540	if (count($values) == 4) {
541	for ($i = 0; $i < 4; $i++) {
542	$return[$shorthands[$property][$i]] = $values[$i] . $important;
543	}
544	} elseif (count($values) == 3) {
545	$return[$shorthands[$property][0]] = $values[0] . $important;
546	$return[$shorthands[$property][1]] = $values[1] . $important;
547	$return[$shorthands[$property][3]] = $values[1] . $important;
548	$return[$shorthands[$property][2]] = $values[2] . $important;
549	} elseif (count($values) == 2) {
550	for ($i = 0; $i < 4; $i++) {
551	$return[$shorthands[$property][$i]] = (($i % 2 != 0)) ? $values[1] . $important : $values[0] . $important;
552	}
553	} else {
554	for ($i = 0; $i < 4; $i++) {
555	$return[$shorthands[$property][$i]] = $values[0] . $important;
556	}
557	}
558
559	return $return;
560	}
561
562	/**
563	* Explodes a string as explode() does, however, not if $sep is escaped or within a string.
564	* @param string $sep seperator
565	* @param string $string
566	* @return array
567	* @version 1.0
568	*/
569	function explode_ws($sep, $string) {
570	$status = 'st';
571	$to = '';
572
573	$output = array();
574	$num = 0;
575	for ($i = 0, $len = strlen($string); $i < $len; $i++) {
576	switch ($status) {
577	case 'st':
578	if ($string{$i} == $sep && !csstidy::escaped($string, $i)) {
579	++$num;
580	} elseif ($string{$i} === '"' \|\| $string{$i} === '\'' \|\| $string{$i} === '(' && !csstidy::escaped($string, $i)) {
581	$status = 'str';
582	$to = ($string{$i} === '(') ? ')' : $string{$i};
583	(isset($output[$num])) ? $output[$num] .= $string{$i} : $output[$num] = $string{$i};
584	} else {
585	(isset($output[$num])) ? $output[$num] .= $string{$i} : $output[$num] = $string{$i};
586	}
587	break;
588
589	case 'str':
590	if ($string{$i} == $to && !csstidy::escaped($string, $i)) {
591	$status = 'st';
592	}
593	(isset($output[$num])) ? $output[$num] .= $string{$i} : $output[$num] = $string{$i};
594	break;
595	}
596	}
597
598	if (isset($output[0])) {
599	return $output;
600	} else {
601	return array($output);
602	}
603	}
604
605	/**
606	* Merges Shorthand properties again, the opposite of dissolve_4value_shorthands()
607	* @param array $array
608	* @return array
609	* @version 1.2
610	* @see dissolve_4value_shorthands()
611	*/
612	function merge_4value_shorthands($array) {
613	$return = $array;
614	$shorthands = & $GLOBALS['csstidy']['shorthands'];
615
616	foreach ($shorthands as $key => $value) {
617	if (isset($array[$value[0]]) && isset($array[$value[1]])
618	&& isset($array[$value[2]]) && isset($array[$value[3]]) && $value !== 0) {
619	$return[$key] = '';
620
621	$important = '';
622	for ($i = 0; $i < 4; $i++) {
623	$val = $array[$value[$i]];
624	if (csstidy::is_important($val)) {
625	$important = '!important';
626	$return[$key] .= csstidy::gvw_important($val) . ' ';
627	} else {
628	$return[$key] .= $val . ' ';
629	}
630	unset($return[$value[$i]]);
631	}
632	$return[$key] = csstidy_optimise::shorthand(trim($return[$key] . $important));
633	}
634	}
635	return $return;
636	}
637
638	/**
639	* Dissolve background property
640	* @param string $str_value
641	* @return array
642	* @version 1.0
643	* @see merge_bg()
644	* @todo full CSS 3 compliance
645	*/
646	function dissolve_short_bg($str_value) {
647	// don't try to explose background gradient !
648	if (stripos($str_value, "gradient(")!==FALSE)
649	return array('background'=>$str_value);
650
651	$background_prop_default = & $GLOBALS['csstidy']['background_prop_default'];
652	$repeat = array('repeat', 'repeat-x', 'repeat-y', 'no-repeat', 'space');
653	$attachment = array('scroll', 'fixed', 'local');
654	$clip = array('border', 'padding');
655	$origin = array('border', 'padding', 'content');
656	$pos = array('top', 'center', 'bottom', 'left', 'right');
657	$important = '';
658	$return = array('background-image' => null, 'background-size' => null, 'background-repeat' => null, 'background-position' => null, 'background-attachment' => null, 'background-clip' => null, 'background-origin' => null, 'background-color' => null);
659
660	if (csstidy::is_important($str_value)) {
661	$important = ' !important';
662	$str_value = csstidy::gvw_important($str_value);
663	}
664
665	$str_value = csstidy_optimise::explode_ws(',', $str_value);
666	for ($i = 0; $i < count($str_value); $i++) {
667	$have['clip'] = false;
668	$have['pos'] = false;
669	$have['color'] = false;
670	$have['bg'] = false;
671
672	if (is_array($str_value[$i])) {
673	$str_value[$i] = $str_value[$i][0];
674	}
675	$str_value[$i] = csstidy_optimise::explode_ws(' ', trim($str_value[$i]));
676
677	for ($j = 0; $j < count($str_value[$i]); $j++) {
678	if ($have['bg'] === false && (substr($str_value[$i][$j], 0, 4) === 'url(' \|\| $str_value[$i][$j] === 'none')) {
679	$return['background-image'] .= $str_value[$i][$j] . ',';
680	$have['bg'] = true;
681	} elseif (in_array($str_value[$i][$j], $repeat, true)) {
682	$return['background-repeat'] .= $str_value[$i][$j] . ',';
683	} elseif (in_array($str_value[$i][$j], $attachment, true)) {
684	$return['background-attachment'] .= $str_value[$i][$j] . ',';
685	} elseif (in_array($str_value[$i][$j], $clip, true) && !$have['clip']) {
686	$return['background-clip'] .= $str_value[$i][$j] . ',';
687	$have['clip'] = true;
688	} elseif (in_array($str_value[$i][$j], $origin, true)) {
689	$return['background-origin'] .= $str_value[$i][$j] . ',';
690	} elseif ($str_value[$i][$j]{0} === '(') {
691	$return['background-size'] .= substr($str_value[$i][$j], 1, -1) . ',';
692	} 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} === '.') {
693	$return['background-position'] .= $str_value[$i][$j];
694	if (!$have['pos'])
695	$return['background-position'] .= ' '; else
696	$return['background-position'].= ',';
697	$have['pos'] = true;
698	}
699	elseif (!$have['color']) {
700	$return['background-color'] .= $str_value[$i][$j] . ',';
701	$have['color'] = true;
702	}
703	}
704	}
705
706	foreach ($background_prop_default as $bg_prop => $default_value) {
707	if ($return[$bg_prop] !== null) {
708	$return[$bg_prop] = substr($return[$bg_prop], 0, -1) . $important;
709	}
710	else
711	$return[$bg_prop] = $default_value . $important;
712	}
713	return $return;
714	}
715
716	/**
717	* Merges all background properties
718	* @param array $input_css
719	* @return array
720	* @version 1.0
721	* @see dissolve_short_bg()
722	* @todo full CSS 3 compliance
723	*/
724	function merge_bg($input_css) {
725	$background_prop_default = & $GLOBALS['csstidy']['background_prop_default'];
726	// Max number of background images. CSS3 not yet fully implemented
727	$number_of_values = @max(count(csstidy_optimise::explode_ws(',', $input_css['background-image'])), count(csstidy_optimise::explode_ws(',', $input_css['background-color'])), 1);
728	// Array with background images to check if BG image exists
729	$bg_img_array = @csstidy_optimise::explode_ws(',', csstidy::gvw_important($input_css['background-image']));
730	$new_bg_value = '';
731	$important = '';
732
733	// if background properties is here and not empty, don't try anything
734	if (isset($input_css['background']) AND $input_css['background'])
735	return $input_css;
736
737	for ($i = 0; $i < $number_of_values; $i++) {
738	foreach ($background_prop_default as $bg_property => $default_value) {
739	// Skip if property does not exist
740	if (!isset($input_css[$bg_property])) {
741	continue;
742	}
743
744	$cur_value = $input_css[$bg_property];
745	// skip all optimisation if gradient() somewhere
746	if (stripos($cur_value, "gradient(")!==FALSE)
747	return $input_css;
748
749	// Skip some properties if there is no background image
750	if ((!isset($bg_img_array[$i]) \|\| $bg_img_array[$i] === 'none')
751	&& ($bg_property === 'background-size' \|\| $bg_property === 'background-position'
752	\|\| $bg_property === 'background-attachment' \|\| $bg_property === 'background-repeat')) {
753	continue;
754	}
755
756	// Remove !important
757	if (csstidy::is_important($cur_value)) {
758	$important = ' !important';
759	$cur_value = csstidy::gvw_important($cur_value);
760	}
761
762	// Do not add default values
763	if ($cur_value === $default_value) {
764	continue;
765	}
766
767	$temp = csstidy_optimise::explode_ws(',', $cur_value);
768
769	if (isset($temp[$i])) {
770	if ($bg_property === 'background-size') {
771	$new_bg_value .= '(' . $temp[$i] . ') ';
772	} else {
773	$new_bg_value .= $temp[$i] . ' ';
774	}
775	}
776	}
777
778	$new_bg_value = trim($new_bg_value);
779	if ($i != $number_of_values - 1)
780	$new_bg_value .= ',';
781	}
782
783	// Delete all background-properties
784	foreach ($background_prop_default as $bg_property => $default_value) {
785	unset($input_css[$bg_property]);
786	}
787
788	// Add new background property
789	if ($new_bg_value !== '')
790	$input_css['background'] = $new_bg_value . $important;
791	elseif(isset ($input_css['background']))
792	$input_css['background'] = 'none';
793
794	return $input_css;
795	}
796
797	/**
798	* Dissolve font property
799	* @param string $str_value
800	* @return array
801	* @version 1.3
802	* @see merge_font()
803	*/
804	function dissolve_short_font($str_value) {
805	$font_prop_default = & $GLOBALS['csstidy']['font_prop_default'];
806	$font_weight = array('normal', 'bold', 'bolder', 'lighter', 100, 200, 300, 400, 500, 600, 700, 800, 900);
807	$font_variant = array('normal', 'small-caps');
808	$font_style = array('normal', 'italic', 'oblique');
809	$important = '';
810	$return = array('font-style' => null, 'font-variant' => null, 'font-weight' => null, 'font-size' => null, 'line-height' => null, 'font-family' => null);
811
812	if (csstidy::is_important($str_value)) {
813	$important = '!important';
814	$str_value = csstidy::gvw_important($str_value);
815	}
816
817	$have['style'] = false;
818	$have['variant'] = false;
819	$have['weight'] = false;
820	$have['size'] = false;
821	// Detects if font-family consists of several words w/o quotes
822	$multiwords = false;
823
824	// Workaround with multiple font-family
825	$str_value = csstidy_optimise::explode_ws(',', trim($str_value));
826
827	$str_value[0] = csstidy_optimise::explode_ws(' ', trim($str_value[0]));
828
829	for ($j = 0; $j < count($str_value[0]); $j++) {
830	if ($have['weight'] === false && in_array($str_value[0][$j], $font_weight)) {
831	$return['font-weight'] = $str_value[0][$j];
832	$have['weight'] = true;
833	} elseif ($have['variant'] === false && in_array($str_value[0][$j], $font_variant)) {
834	$return['font-variant'] = $str_value[0][$j];
835	$have['variant'] = true;
836	} elseif ($have['style'] === false && in_array($str_value[0][$j], $font_style)) {
837	$return['font-style'] = $str_value[0][$j];
838	$have['style'] = true;
839	} elseif ($have['size'] === false && (is_numeric($str_value[0][$j]{0}) \|\| $str_value[0][$j]{0} === null \|\| $str_value[0][$j]{0} === '.')) {
840	$size = csstidy_optimise::explode_ws('/', trim($str_value[0][$j]));
841	$return['font-size'] = $size[0];
842	if (isset($size[1])) {
843	$return['line-height'] = $size[1];
844	} else {
845	$return['line-height'] = ''; // don't add 'normal' !
846	}
847	$have['size'] = true;
848	} else {
849	if (isset($return['font-family'])) {
850	$return['font-family'] .= ' ' . $str_value[0][$j];
851	$multiwords = true;
852	} else {
853	$return['font-family'] = $str_value[0][$j];
854	}
855	}
856	}
857	// add quotes if we have several qords in font-family
858	if ($multiwords !== false) {
859	$return['font-family'] = '"' . $return['font-family'] . '"';
860	}
861	$i = 1;
862	while (isset($str_value[$i])) {
863	$return['font-family'] .= ',' . trim($str_value[$i]);
864	$i++;
865	}
866
867	// Fix for 100 and more font-size
868	if ($have['size'] === false && isset($return['font-weight']) &&
869	is_numeric($return['font-weight']{0})) {
870	$return['font-size'] = $return['font-weight'];
871	unset($return['font-weight']);
872	}
873
874	foreach ($font_prop_default as $font_prop => $default_value) {
875	if ($return[$font_prop] !== null) {
876	$return[$font_prop] = $return[$font_prop] . $important;
877	}
878	else
879	$return[$font_prop] = $default_value . $important;
880	}
881	return $return;
882	}
883
884	/**
885	* Merges all fonts properties
886	* @param array $input_css
887	* @return array
888	* @version 1.3
889	* @see dissolve_short_font()
890	*/
891	function merge_font($input_css) {
892	$font_prop_default = & $GLOBALS['csstidy']['font_prop_default'];
893	$new_font_value = '';
894	$important = '';
895	// Skip if not font-family and font-size set
896	if (isset($input_css['font-family']) && isset($input_css['font-size'])) {
897	// fix several words in font-family - add quotes
898	if (isset($input_css['font-family'])) {
899	$families = explode(",", $input_css['font-family']);
900	$result_families = array();
901	foreach ($families as $family) {
902	$family = trim($family);
903	$len = strlen($family);
904	if (strpos($family, " ") &&
905	!(($family{0} == '"' && $family{$len - 1} == '"') \|\|
906	($family{0} == "'" && $family{$len - 1} == "'"))) {
907	$family = '"' . $family . '"';
908	}
909	$result_families[] = $family;
910	}
911	$input_css['font-family'] = implode(",", $result_families);
912	}
913	foreach ($font_prop_default as $font_property => $default_value) {
914
915	// Skip if property does not exist
916	if (!isset($input_css[$font_property])) {
917	continue;
918	}
919
920	$cur_value = $input_css[$font_property];
921
922	// Skip if default value is used
923	if ($cur_value === $default_value) {
924	continue;
925	}
926
927	// Remove !important
928	if (csstidy::is_important($cur_value)) {
929	$important = '!important';
930	$cur_value = csstidy::gvw_important($cur_value);
931	}
932
933	$new_font_value .= $cur_value;
934	// Add delimiter
935	$new_font_value .= ( $font_property === 'font-size' &&
936	isset($input_css['line-height'])) ? '/' : ' ';
937	}
938
939	$new_font_value = trim($new_font_value);
940
941	// Delete all font-properties
942	foreach ($font_prop_default as $font_property => $default_value) {
943	if ($font_property!=='font' OR !$new_font_value)
944	unset($input_css[$font_property]);
945	}
946
947	// Add new font property
948	if ($new_font_value !== '') {
949	$input_css['font'] = $new_font_value . $important;
950	}
951	}
952
953	return $input_css;
954	}
955
956	}

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