tablepress / libraries / csstidy / class.csstidy.php

class.csstidy.php in TablePress – Tables in WordPress made easy 1.12, at libraries/csstidy/class.csstidy.php

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1	<?php
2	/**
3	* CSSTidy Parsing PHP Class
4	*
5	* @package TablePress
6	* @subpackage CSS
7	* @author Florian Schmitz, Brett Zamir, Nikolay Matsievsky, Cedric Morin, Christopher Finke, Mark Scherer, Tobias Bäthge
8	* @since 1.0.0
9	*/
10
11	// Prohibit direct script loading.
12	defined( 'ABSPATH' ) \|\| die( 'No direct script access allowed!' );
13
14	/**
15	* CSSTidy - CSS Parser and Optimiser
16	*
17	* CSS Parser class
18	*
19	* Copyright 2005, 2006, 2007 Florian Schmitz
20	*
21	* This file is part of CSSTidy.
22	*
23	* CSSTidy is free software; you can redistribute it and/or modify
24	* it under the terms of the GNU Lesser General Public License as published by
25	* the Free Software Foundation; either version 2.1 of the License, or
26	* (at your option) any later version.
27	*
28	* CSSTidy is distributed in the hope that it will be useful,
29	* but WITHOUT ANY WARRANTY; without even the implied warranty of
30	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31	* GNU Lesser General Public License for more details.
32	*
33	* You should have received a copy of the GNU Lesser General Public License
34	* along with this program. If not, see <https://www.gnu.org/licenses/>.
35	*
36	* @license https://opensource.org/licenses/lgpl-license.php GNU Lesser General Public License
37	* @package CSSTidy
38	* @author Florian Schmitz (floele at gmail dot com) 2005-2007
39	* @author Brett Zamir (brettz9 at yahoo dot com) 2007
40	* @author Nikolay Matsievsky (speed at webo dot name) 2009-2010
41	* @author Cedric Morin (cedric at yterium dot com) 2010-2012
42	* @author Christopher Finke (cfinke at gmail.com) 2012
43	* @author Mark Scherer (remove $GLOBALS once and for all + PHP5.4 comp) 2012
44	*/
45
46	/**
47	* Defines constants.
48	*
49	* @TODO: Make these class constants of CSSTidy.
50	* @since 1.0.0
51	*/
52	define( 'AT_START', 1 );
53	define( 'AT_END', 2 );
54	define( 'SEL_START', 3 );
55	define( 'SEL_END', 4 );
56	define( 'PROPERTY', 5 );
57	define( 'VALUE', 6 );
58	define( 'COMMENT', 7 );
59	define( 'IMPORTANT_COMMENT', 8 );
60	define( 'DEFAULT_AT', 41 );
61
62	/**
63	* Load the class for printing CSS code.
64	*
65	* @since 1.0.0
66	*/
67	require __DIR__ . '/class.csstidy_print.php';
68
69	/**
70	* Load the class for optimising CSS code.
71	*
72	* @since 1.0.0
73	*/
74	require __DIR__ . '/class.csstidy_optimise.php';
75
76	/**
77	* CSS Parser class
78	*
79	* This class represents a CSS parser which reads CSS code and saves it in an array.
80	* In opposite to most other CSS parsers, it does not use regular expressions and
81	* thus has full CSS2 support and a higher reliability.
82	* Additionally to that, it applies some optimizations and fixes to the CSS code.
83	*
84	* @package CSSTidy
85	* @since 1.0.0
86	*/
87	class TablePress_CSSTidy {
88
89	/**
90	* The parsed CSS.
91	*
92	* This array is empty if preserve_css is on.
93	*
94	* @since 1.0.0
95	* @var array
96	*/
97	public $css = array();
98
99	/**
100	* The raw parsed CSS.
101	*
102	* @since 1.0.0
103	* @var array
104	*/
105	public $tokens = array();
106
107	/**
108	* Instance of the CSS Printer class.
109	*
110	* @since 1.0.0
111	* @var TablePress_CSSTidy_print
112	*/
113	public $print;
114
115	/**
116	* Instance of the CSS Optimiser class.
117	*
118	* @since 1.0.0
119	* @var TablePress_CSSTidy_optimise
120	*/
121	public $optimise;
122
123	/**
124	* The CSS charset.
125	*
126	* @since 1.0.0
127	* @var string
128	*/
129	public $charset = '';
130
131	/**
132	* All @import URLs.
133	*
134	* @since 1.0.0
135	* @var array
136	*/
137	public $import = array();
138
139	/**
140	* The namespace.
141	*
142	* @since 1.0.0
143	* @var string
144	*/
145	public $namespace = '';
146
147	/**
148	* The CSSTidy version.
149	*
150	* @since 1.0.0
151	* @var string
152	*/
153	public $version = '1.5.3';
154
155	/**
156	* The settings.
157	*
158	* @since 1.0.0
159	* @var array
160	*/
161	protected $settings = array();
162
163	/**
164	* The parser-status.
165	*
166	* Possible values:
167	* - is = in selector
168	* - ip = in property
169	* - iv = in value
170	* - instr = in string (started at " or ' or ( )
171	* - ic = in comment (ignore everything)
172	* - at = in @-block
173	*
174	* @since 1.0.0
175	* @var string
176	*/
177	protected $status = 'is';
178
179	/**
180	* The current at rule (@media).
181	*
182	* @since 1.0.0
183	* @var string
184	*/
185	public $at = '';
186
187	/**
188	* The at rule for next selector (during @font-face or other @).
189	*
190	* @since 1.0.0
191	* @var string
192	*/
193	protected $next_selector_at = '';
194
195	/**
196	* The current selector.
197	*
198	* @since 1.0.0
199	* @var string
200	*/
201	public $selector = '';
202
203	/**
204	* The current property.
205	*
206	* @since 1.0.0
207	* @var string
208	*/
209	public $property = '';
210
211	/**
212	* The position of , in selectors.
213	*
214	* @since 1.0.0
215	* @var array
216	*/
217	protected $sel_separate = array();
218
219	/**
220	* The current value.
221	*
222	* @since 1.0.0
223	* @var string
224	*/
225	public $value = '';
226
227	/**
228	* The current sub-value.
229	*
230	* Example for a sub-value: In the CSS rule
231	* background: url(foo.png) red no-repeat;
232	* "url(foo.png)", "red", and "no-repeat" are sub-values,
233	* separated by whitespace.
234	*
235	* @since 1.0.0
236	* @var string
237	*/
238	public $sub_value = '';
239
240	/**
241	* All sub-values for a property.
242	*
243	* @since 1.0.0
244	* @var array
245	*/
246	protected $sub_value_arr = array();
247
248	/**
249	* The stack of characters that opened the current strings.
250	*
251	* @since 1.0.0
252	* @var array
253	*/
254	public $str_char = array();
255
256	/**
257	* [$cur_string description]
258	*
259	* @since 1.0.0
260	* @var array
261	*/
262	public $cur_string = array();
263
264	/**
265	* Status from which the parser switched to ic or instr
266	*
267	* @since 1.0.0
268	* @var array
269	*/
270	protected $from = array();
271
272	/**
273	* True if in invalid at-rule.
274	*
275	* @since 1.0.0
276	* @var bool
277	*/
278	protected $invalid_at = false;
279
280	/**
281	* True if something has been added to the current selector.
282	*
283	* @since 1.0.0
284	* @var bool
285	*/
286	protected $added = false;
287
288	/**
289	* The message log.
290	*
291	* @since 1.0.0
292	* @var array
293	*/
294	public $log = array();
295
296	/**
297	* The line number.
298	*
299	* @since 1.0.0
300	* @var int
301	*/
302	protected $line = 1;
303
304	/**
305	* Marks if we need to leave quotes for a string.
306	*
307	* @since 1.0.0
308	* @var array
309	*/
310	protected $quoted_string = array();
311
312	/**
313	* List of tokens.
314	*
315	* @since 1.0.0
316	* @var string
317	*/
318	protected $tokens_list = '';
319
320	/**
321	* Various CSS Data for CSSTidy.
322	*
323	* @since 1.0.0
324	* @var array
325	*/
326	public $data = array();
327
328	/**
329	* The output templates.
330	*
331	* @since 1.0.0
332	* @var array
333	*/
334	public $template = array();
335
336	/**
337	* Loads standard template and sets default settings.
338	*
339	* @since 1.0.0
340	*/
341	public function __construct() {
342	include __DIR__ . '/data.inc.php';
343	$this->data = $data;
344
345	$this->settings['remove_bslash'] = true;
346	$this->settings['compress_colors'] = true;
347	$this->settings['compress_font-weight'] = true;
348	$this->settings['lowercase_s'] = false;
349	/*
350	* 1 common shorthands optimization
351	* 2 + font property optimization
352	* 3 + background property optimization
353	*/
354	$this->settings['optimise_shorthands'] = 1;
355	$this->settings['remove_last_;'] = true;
356	// Rewrite all properties with lower case, better for later gzipping.
357	$this->settings['case_properties'] = 1;
358	/*
359	* Sort properties in alpabetic order, better for later gzipping,
360	* but can cause trouble in case of overiding same properties or using hacks.
361	*/
362	$this->settings['sort_properties'] = false;
363	/*
364	* 1, 3, 5, etc -- Enable sorting selectors inside @media: a{}b{}c{}.
365	* 2, 5, 8, etc -- Enable sorting selectors inside one CSS declaration: a,b,c{}.
366	* Preserve order by default cause it can break functionality.
367	*/
368	$this->settings['sort_selectors'] = 0;
369	// Is dangerous to be used: CSS is broken sometimes.
370	$this->settings['merge_selectors'] = 0;
371	// Whether to preserve browser hacks.
372	$this->settings['discard_invalid_selectors'] = false;
373	$this->settings['discard_invalid_properties'] = false;
374	$this->settings['css_level'] = 'CSS3.0';
375	$this->settings['preserve_css'] = false;
376	$this->settings['timestamp'] = false;
377	$this->settings['template'] = ''; // say that property exists.
378	$this->set_cfg( 'template', 'default' ); // Call load_template.
379
380	$this->print = new TablePress_CSSTidy_print( $this );
381	$this->optimise = new TablePress_CSSTidy_optimise( $this );
382
383	$this->tokens_list = &$this->data['csstidy']['tokens'];
384	}
385
386	/**
387	* Get the value of a setting.
388	*
389	* @since 1.0.0
390	*
391	* @param string $setting Setting to get.
392	* @return string\|bool Value of the setting.
393	*/
394	public function get_cfg( $setting ) {
395	if ( isset( $this->settings[ $setting ] ) ) {
396	return $this->settings[ $setting ];
397	}
398	return false;
399	}
400
401	/**
402	* Load a template.
403	*
404	* @since 1.0.0
405	*
406	* @param string $template Template used by set_cfg to load a template via a configuration setting.
407	*/
408	protected function _load_template( $template ) {
409	switch ( $template ) {
410	case 'default':
411	$this->load_template( 'default' );
412	break;
413	case 'highest':
414	case 'high':
415	case 'low':
416	$this->load_template( $template . '_compression' );
417	break;
418	default:
419	$this->load_template( $template );
420	break;
421	}
422	}
423
424	/**
425	* Set the value of a setting.
426	*
427	* @since 1.0.0
428	*
429	* @param string $setting Setting.
430	* @param mixed $value Optional. Value of the setting.
431	* @return bool [return value]
432	*/
433	public function set_cfg( $setting, $value = null ) {
434	if ( is_array( $setting ) && is_null( $value ) ) {
435	foreach ( $setting as $setprop => $setval ) {
436	$this->settings[ $setprop ] = $setval;
437	}
438	if ( array_key_exists( 'template', $setting ) ) {
439	$this->_load_template( $this->settings['template'] );
440	}
441	return true;
442	} elseif ( isset( $this->settings[ $setting ] ) && '' !== $value ) {
443	$this->settings[ $setting ] = $value;
444	if ( 'template' === $setting ) {
445	$this->_load_template( $this->settings['template'] );
446	}
447	return true;
448	}
449	return false;
450	}
451
452	/**
453	* Adds a token to $this->tokens.
454	*
455	* @since 1.0.0
456	*
457	* @param mixed $type Type.
458	* @param string $data Data.
459	* @param bool $do Optional. Add a token even if preserve_css is off.
460	*/
461	public function _add_token( $type, $data, $do = false ) {
462	if ( $this->get_cfg( 'preserve_css' ) \|\| $do ) {
463	// nested @...: if opening a new part we just closed, remove the previous closing instead of adding opening.
464	if ( AT_START === $type
465	&& count( $this->tokens )
466	&& ( $last = end( $this->tokens ) )
467	&& AT_END === $last[0]
468	&& trim( $data ) === $last[1] ) {
469	array_pop( $this->tokens );
470	} else {
471	$this->tokens[] = array( $type, ( COMMENT === $type \|\| IMPORTANT_COMMENT === $type ) ? $data : trim( $data ) );
472	}
473	}
474	}
475
476	/**
477	* Add a message to the message log.
478	*
479	* @since 1.0.0
480	*
481	* @param string $message Message.
482	* @param string $type Type.
483	* @param int $line Optional. Line number. -1 will use the current line.
484	*/
485	public function log( $message, $type, $line = -1 ) {
486	if ( -1 === $line ) {
487	$line = $this->line;
488	}
489	$line = intval( $line );
490	$add = array(
491	'm' => $message,
492	't' => $type,
493	);
494	if ( ! isset( $this->log[ $line ] ) \|\| ! in_array( $add, $this->log[ $line ], true ) ) {
495	$this->log[ $line ][] = $add;
496	}
497	}
498
499	/**
500	* Parse Unicode notations and find a replacement character.
501	*
502	* @since 1.0.0
503	*
504	* @param string $string String.
505	* @param int $i i.
506	* @return string [return value]
507	*/
508	public function _unicode( &$string, &$i ) {
509	++$i;
510	$add = '';
511	$replaced = false;
512
513	while ( $i < strlen( $string ) && ( ctype_xdigit( $string[ $i ] ) \|\| ctype_space( $string[ $i ] ) ) && strlen( $add ) < 6 ) {
514	$add .= $string[ $i ];
515	if ( ctype_space( $string[ $i ] ) ) {
516	break;
517	}
518	$i++;
519	}
520
521	if ( hexdec( $add ) > 47 && hexdec( $add ) < 58 \|\| hexdec( $add ) > 64 && hexdec( $add ) < 91 \|\| hexdec( $add ) > 96 && hexdec( $add ) < 123 ) {
522	$this->log( 'Replaced unicode notation: Changed \\' . $add . ' to ' . chr( hexdec( $add ) ), 'Information' );
523	$add = chr( hexdec( $add ) );
524	$replaced = true;
525	} else {
526	$add = trim( '\\' . $add );
527	}
528
529	if ( @ctype_xdigit( $string[ $i + 1 ] ) && ctype_space( $string[ $i ] ) && ! $replaced \|\| ! ctype_space( $string[ $i ] ) ) {
530	$i--;
531	}
532
533	if ( '\\' !== $add \|\| ! $this->get_cfg( 'remove_bslash' ) \|\| false !== strpos( $this->tokens_list, $string[ $i + 1 ] ) ) {
534	return $add;
535	}
536
537	if ( '\\' === $add ) {
538	$this->log( 'Removed unnecessary backslash', 'Information' );
539	}
540
541	return '';
542	}
543
544	/**
545	* Write formatted output to a file.
546	*
547	* @since 1.0.0
548	*
549	* @param string $filename File name.
550	*/
551	public function write_page( $filename ) {
552	$this->write( $filename, true );
553	}
554
555	/**
556	* Write plain output to a file.
557	*
558	* @since 1.0.0
559	*
560	* @param string $filename File name.
561	* @param bool $formatted Optional. Whether to print formatted or not.
562	* @param string $doctype Optional. When printing formatted, is a shorthand for the document type.
563	* @param bool $externalcss Optional. When printing formatted, indicates whether styles to be attached internally or as an external stylesheet.
564	* @param string $title Optional. When printing formatted, is the title to be added in the head of the document.
565	* @param string $lang Optional. When printing formatted, gives a two-letter language code to be added to the output.
566	*/
567	public function write( $filename, $formatted = false, $doctype = 'xhtml1.1', $externalcss = true, $title = '', $lang = 'en' ) {
568	$filename .= ( $formatted ) ? '.xhtml' : '.css';
569
570	if ( ! is_dir( 'temp' ) ) {
571	$madedir = mkdir( 'temp' );
572	if ( ! $madedir ) {
573	print 'Could not make directory "temp" in ' . __DIR__;
574	exit;
575	}
576	}
577	$handle = fopen( 'temp/' . $filename, 'w' );
578	if ( $handle ) {
579	if ( ! $formatted ) {
580	fwrite( $handle, $this->print->plain() );
581	} else {
582	fwrite( $handle, $this->print->formatted_page( $doctype, $externalcss, $title, $lang ) );
583	}
584	}
585	fclose( $handle );
586	}
587
588	/**
589	* Loads a new template.
590	*
591	* @since 1.0.0
592	*
593	* @link http://csstidy.sourceforge.net/templates.php
594	*
595	* @param string $content Either file name (if $from_file is true), content of a template file, "high_compression", "highest_compression", "low_compression", or "default".
596	* @param bool $from_file Optional. Uses $content as filename if true.
597	*/
598	protected function load_template( $content, $from_file = true ) {
599	$predefined_templates = &$this->data['csstidy']['predefined_templates'];
600	if ( in_array( $content, array( 'default', 'low_compression', 'high_compression', 'highest_compression' ), true ) ) {
601	$this->template = $predefined_templates[ $content ];
602	return;
603	}
604
605	if ( $from_file ) {
606	$content = strip_tags( file_get_contents( $content ), '<span>' );
607	}
608	// Unify newlines (because the output also only uses \n).
609	$content = str_replace( "\r\n", "\n", $content );
610	$template = explode( '\|', $content );
611
612	for ( $i = 0; $i < count( $template ); $i++ ) {
613	$this->template[ $i ] = $template[ $i ];
614	}
615	}
616
617	/**
618	* Starts parsing from URL.
619	*
620	* @since 1.0.0
621	*
622	* @param string $url URL.
623	* @return bool
624	*/
625	protected function parse_from_url( $url ) {
626	return $this->parse( @file_get_contents( $url ) );
627	}
628
629	/**
630	* Checks if there is a token at the current position.
631	*
632	* @since 1.0.0
633	*
634	* @param string $string String.
635	* @param int $i i.
636	* @return bool [return value]
637	*/
638	protected function is_token( &$string, $i ) {
639	return ( false !== strpos( $this->tokens_list, $string[ $i ] ) && ! $this->escaped( $string, $i ) );
640	}
641
642	/**
643	* Parses CSS in a string. The output is saved as an array in $this->css.
644	*
645	* @since 1.0.0
646	*
647	* @param string $string The CSS code.
648	* @return bool [return value]
649	*/
650	public function parse( $string ) {
651	// Temporarily set locale to en_US in order to handle floats properly.
652	$old = @setlocale( LC_ALL, 0 );
653	@setlocale( LC_ALL, 'C' );
654
655	$all_properties = &$this->data['csstidy']['all_properties'];
656	$at_rules = &$this->data['csstidy']['at_rules'];
657	$quoted_string_properties = &$this->data['csstidy']['quoted_string_properties'];
658
659	$this->css = array();
660	$this->print->input_css = $string;
661	$string = str_replace( "\r\n", "\n", $string ) . ' ';
662	$cur_comment = '';
663	$cur_at = '';
664
665	for ( $i = 0, $size = strlen( $string ); $i < $size; $i++ ) {
666	if ( "\n" === $string[ $i ] \|\| "\r" === $string[ $i ] ) {
667	++$this->line;
668	}
669
670	switch ( $this->status ) {
671	/* Case in at-block */
672	case 'at':
673	if ( $this->is_token( $string, $i ) ) {
674	if ( '/' === $string[ $i ] && '*' === @$string[ $i + 1 ] ) {
675	$this->status = 'ic';
676	++$i;
677	$this->from[] = 'at';
678	} elseif ( '{' === $string[ $i ] ) {
679	$this->status = 'is';
680	$this->at = $this->css_new_media_section( $this->at, $cur_at );
681	$this->_add_token( AT_START, $this->at );
682	} elseif ( ',' === $string[ $i ] ) {
683	$cur_at = trim( $cur_at ) . ',';
684	} elseif ( '\\' === $string[ $i ] ) {
685	$cur_at .= $this->_unicode( $string, $i );
686	}
687	// Fix for complicated media, i.e @media screen and (-webkit-min-device-pixel-ratio:1.5)
688	// '/' is included for ratios in Opera: (-o-min-device-pixel-ratio: 3/2)
689	elseif ( in_array( $string[ $i ], array( '(', ')', ':', '.', '/' ), true ) ) {
690	$cur_at .= $string[ $i ];
691	}
692	} else {
693	$lastpos = strlen( $cur_at ) - 1;
694	if ( ! ( ( ctype_space( $cur_at[ $lastpos ] ) \|\| $this->is_token( $cur_at, $lastpos ) && ',' === $cur_at[ $lastpos ] ) && ctype_space( $string[ $i ] ) ) ) {
695	$cur_at .= $string[ $i ];
696	}
697	}
698	break;
699	/* Case in-selector */
700	case 'is':
701	if ( $this->is_token( $string, $i ) ) {
702	if ( '/' === $string[ $i ] && '*' === @$string[ $i + 1 ] && '' === trim( $this->selector ) ) {
703	$this->status = 'ic';
704	++$i;
705	$this->from[] = 'is';
706	} elseif ( '@' === $string[ $i ] && '' === trim( $this->selector ) ) {
707	// Check for at-rule.
708	$this->invalid_at = true;
709	foreach ( $at_rules as $name => $type ) {
710	if ( ! strcasecmp( substr( $string, $i + 1, strlen( $name ) ), $name ) ) {
711	if ( 'at' === $type ) {
712	$cur_at = '@' . $name;
713	} else {
714	$this->selector = '@' . $name;
715	}
716	if ( 'atis' === $type ) {
717	$this->next_selector_at = ( $this->next_selector_at ? $this->next_selector_at : ( $this->at ? $this->at : DEFAULT_AT ) );
718	$this->at = $this->css_new_media_section( $this->at, ' ', true );
719	$type = 'is';
720	}
721	$this->status = $type;
722	$i += strlen( $name );
723	$this->invalid_at = false;
724	break;
725	}
726	}
727
728	if ( $this->invalid_at ) {
729	$this->selector = '@';
730	$invalid_at_name = '';
731	for ( $j = $i + 1; $j < $size; ++$j ) {
732	if ( ! ctype_alpha( $string[ $j ] ) ) {
733	break;
734	}
735	$invalid_at_name .= $string[ $j ];
736	}
737	$this->log( 'Invalid @-rule: ' . $invalid_at_name . ' (removed)', 'Warning' );
738	}
739	} elseif ( ( '"' === $string[ $i ] \|\| "'" === $string[ $i ] ) ) {
740	$this->cur_string[] = $string[ $i ];
741	$this->status = 'instr';
742	$this->str_char[] = $string[ $i ];
743	$this->from[] = 'is';
744	/* Fixing CSS3 attribute selectors, i.e. a[href$=".mp3" */
745	$this->quoted_string[] = ( '=' === $string[ $i - 1 ] );
746	} elseif ( $this->invalid_at && ';' === $string[ $i ] ) {
747	$this->invalid_at = false;
748	$this->status = 'is';
749	if ( $this->next_selector_at ) {
750	$this->at = $this->css_close_media_section( $this->at );
751	$this->at = $this->css_new_media_section( $this->at, $this->next_selector_at );
752	$this->next_selector_at = '';
753	}
754	} elseif ( '{' === $string[ $i ] ) {
755	$this->status = 'ip';
756	if ( '' === $this->at ) {
757	$this->at = $this->css_new_media_section( $this->at, DEFAULT_AT );
758	}
759	$this->selector = $this->css_new_selector( $this->at, $this->selector );
760	$this->_add_token( SEL_START, $this->selector );
761	$this->added = false;
762	} elseif ( '}' === $string[ $i ] ) {
763	$this->_add_token( AT_END, $this->at );
764	$this->at = $this->css_close_media_section( $this->at );
765	$this->selector = '';
766	$this->sel_separate = array();
767	} elseif ( ',' === $string[ $i ] ) {
768	$this->selector = trim( $this->selector ) . ',';
769	$this->sel_separate[] = strlen( $this->selector );
770	} elseif ( '\\' === $string[ $i ] ) {
771	$this->selector .= $this->_unicode( $string, $i );
772	} elseif ( '*' === $string[ $i ] && @in_array( $string[ $i + 1 ], array( '.', '#', '[', ':' ), true ) && ( 0 === $i \|\| '/' !== $string[ $i - 1 ] ) ) {
773	// Remove unnecessary universal selector, FS#147, but not comment in selector.
774	} else {
775	$this->selector .= $string[ $i ];
776	}
777	} else {
778	$lastpos = strlen( $this->selector ) - 1;
779	if ( -1 === $lastpos \|\| ! ( ( ctype_space( $this->selector[ $lastpos ] ) \|\| $this->is_token( $this->selector, $lastpos ) && ',' === $this->selector[ $lastpos ] ) && ctype_space( $string[ $i ] ) ) ) {
780	$this->selector .= $string[ $i ];
781	}
782	}
783	break;
784	/* Case in-property */
785	case 'ip':
786	if ( $this->is_token( $string, $i ) ) {
787	if ( ( ':' === $string[ $i ] \|\| '=' === $string[ $i ] ) && '' !== $this->property ) {
788	$this->status = 'iv';
789	if ( ! $this->get_cfg( 'discard_invalid_properties' ) \|\| $this->property_is_valid( $this->property ) ) {
790	$this->property = $this->css_new_property( $this->at, $this->selector, $this->property );
791	$this->property = strtolower( $this->property );
792	$this->_add_token( PROPERTY, $this->property );
793	}
794	} elseif ( '/' === $string[ $i ] && '*' === @$string[ $i + 1 ] && '' === $this->property ) {
795	$this->status = 'ic';
796	++$i;
797	$this->from[] = 'ip';
798	} elseif ( '}' === $string[ $i ] ) {
799	$this->explode_selectors();
800	$this->status = 'is';
801	$this->invalid_at = false;
802	$this->_add_token( SEL_END, $this->selector );
803	$this->selector = '';
804	$this->property = '';
805	if ( $this->next_selector_at ) {
806	$this->at = $this->css_close_media_section( $this->at );
807	$this->at = $this->css_new_media_section( $this->at, $this->next_selector_at );
808	$this->next_selector_at = '';
809	}
810	} elseif ( ';' === $string[ $i ] ) {
811	$this->property = '';
812	} elseif ( '\\' === $string[ $i ] ) {
813	$this->property .= $this->_unicode( $string, $i );
814	}
815	// else this is dumb IE a hack, keep it
816	// including /
817	elseif ( ( '' === $this->property && ! ctype_space( $string[ $i ] ) ) \|\| ( '/' === $this->property \|\| '/' === $string[ $i ] ) ) {
818	$this->property .= $string[ $i ];
819	}
820	} elseif ( ! ctype_space( $string[ $i ] ) ) {
821	$this->property .= $string[ $i ];
822	}
823	break;
824	/* Case in-value */
825	case 'iv':
826	$pn = ( ( "\n" === $string[ $i ] \|\| "\r" === $string[ $i ] ) && $this->property_is_next( $string, $i + 1 ) \|\| ( strlen( $string ) - 1 ) === $i );
827	if ( ( $this->is_token( $string, $i ) \|\| $pn ) && ( ! ( ',' === $string[ $i ] && ! ctype_space( $string[ $i + 1 ] ) ) ) ) {
828	if ( '/' === $string[ $i ] && '*' === @$string[ $i + 1 ] ) {
829	$this->status = 'ic';
830	++$i;
831	$this->from[] = 'iv';
832	} elseif ( ( '"' === $string[ $i ] \|\| "'" === $string[ $i ] \|\| '(' === $string[ $i ] ) ) {
833	$this->cur_string[] = $string[ $i ];
834	$this->str_char[] = ( '(' === $string[ $i ] ) ? ')' : $string[ $i ];
835	$this->status = 'instr';
836	$this->from[] = 'iv';
837	$this->quoted_string[] = in_array( strtolower( $this->property ), $quoted_string_properties, true );
838	} elseif ( ',' === $string[ $i ] ) {
839	$this->sub_value = trim( $this->sub_value ) . ',';
840	} elseif ( '\\' === $string[ $i ] ) {
841	$this->sub_value .= $this->_unicode( $string, $i );
842	} elseif ( ';' === $string[ $i ] \|\| $pn ) {
843	if ( '@' === $this->selector[0] && isset( $at_rules[ substr( $this->selector, 1 ) ] ) && 'iv' === $at_rules[ substr( $this->selector, 1 ) ] ) {
844	$this->status = 'is';
845
846	switch ( $this->selector ) {
847	case '@charset':
848	// Add quotes to charset.
849	$this->sub_value_arr[] = '"' . trim( $this->sub_value ) . '"';
850	$this->charset = $this->sub_value_arr[0];
851	break;
852	case '@namespace':
853	// Add quotes to namespace.
854	$this->sub_value_arr[] = '"' . trim( $this->sub_value ) . '"';
855	$this->namespace = implode( ' ', $this->sub_value_arr );
856	break;
857	case '@import':
858	$this->sub_value = trim( $this->sub_value );
859
860	if ( empty( $this->sub_value_arr ) ) {
861	// Quote URLs in imports only if they're not already inside url() and not already quoted.
862	if ( 'url(' !== substr( $this->sub_value, 0, 4 ) ) {
863	if ( ! ( substr( $this->sub_value, -1 ) === $this->sub_value[0] && in_array( $this->sub_value[0], array( "'", '"' ), true ) ) ) {
864	$this->sub_value = '"' . $this->sub_value . '"';
865	}
866	}
867	}
868
869	$this->sub_value_arr[] = $this->sub_value;
870	$this->import[] = implode( ' ', $this->sub_value_arr );
871	break;
872	}
873
874	$this->sub_value_arr = array();
875	$this->sub_value = '';
876	$this->selector = '';
877	$this->sel_separate = array();
878	} else {
879	$this->status = 'ip';
880	}
881	} elseif ( '}' !== $string[ $i ] ) {
882	$this->sub_value .= $string[ $i ];
883	}
884	if ( ( '}' === $string[ $i ] \|\| ';' === $string[ $i ] \|\| $pn ) && ! empty( $this->selector ) ) {
885	if ( '' === $this->at ) {
886	$this->at = $this->css_new_media_section( DEFAULT_AT );
887	}
888
889	// Case settings.
890	if ( $this->get_cfg( 'lowercase_s' ) ) {
891	$this->selector = strtolower( $this->selector );
892	}
893	$this->property = strtolower( $this->property );
894
895	$this->optimise->subvalue();
896	if ( '' !== $this->sub_value ) {
897	$this->sub_value_arr[] = $this->sub_value;
898	$this->sub_value = '';
899	}
900
901	$this->value = '';
902	while ( count( $this->sub_value_arr ) ) {
903	$sub = array_shift( $this->sub_value_arr );
904	if ( strstr( $this->selector, 'font-face' ) ) {
905	$sub = $this->quote_font_format( $sub );
906	}
907
908	if ( '' !== $sub ) {
909	if ( strlen( $this->value ) && ( ',' !== substr( $this->value, -1, 1 ) \|\| $this->get_cfg( 'preserve_css' ) ) ) {
910	$this->value .= ' ';
911	}
912	$this->value .= $sub;
913	}
914	}
915
916	$this->optimise->value();
917
918	$valid = $this->property_is_valid( $this->property );
919	if ( ( ! $this->invalid_at \|\| $this->get_cfg( 'preserve_css' ) ) && ( ! $this->get_cfg( 'discard_invalid_properties' ) \|\| $valid ) ) {
920	$this->css_add_property( $this->at, $this->selector, $this->property, $this->value );
921	$this->_add_token( VALUE, $this->value );
922	$this->optimise->shorthands();
923	}
924	if ( ! $valid ) {
925	if ( $this->get_cfg( 'discard_invalid_properties' ) ) {
926	$this->log( 'Removed invalid property: ' . $this->property, 'Warning' );
927	} else {
928	$this->log( 'Invalid property in ' . strtoupper( $this->get_cfg( 'css_level' ) ) . ': ' . $this->property, 'Warning' );
929	}
930	}
931
932	$this->property = '';
933	$this->sub_value_arr = array();
934	$this->value = '';
935	}
936	if ( '}' === $string[ $i ] ) {
937	$this->explode_selectors();
938	$this->_add_token( SEL_END, $this->selector );
939	$this->status = 'is';
940	$this->invalid_at = false;
941	$this->selector = '';
942	if ( $this->next_selector_at ) {
943	$this->at = $this->css_new_media_section( $this->next_selector_at );
944	$this->next_selector_at = '';
945	}
946	}
947	} elseif ( ! $pn ) {
948	$this->sub_value .= $string[ $i ];
949
950	if ( ctype_space( $string[ $i ] ) \|\| ',' === $string[ $i ] ) {
951	$this->optimise->subvalue();
952	if ( '' !== $this->sub_value ) {
953	$this->sub_value_arr[] = $this->sub_value;
954	$this->sub_value = '';
955	}
956	}
957	}
958	break;
959	/* Case in string */
960	case 'instr':
961	$_str_char = $this->str_char[ count( $this->str_char ) - 1 ];
962	$_cur_string = $this->cur_string[ count( $this->cur_string ) - 1 ];
963	$_quoted_string = $this->quoted_string[ count( $this->quoted_string ) - 1 ];
964	$temp_add = $string[ $i ];
965
966	// Add another string to the stack. Strings can't be nested inside of quotes, only parentheses,
967	// but parentheticals can be nested more than once.
968	if ( ')' === $_str_char && ( '(' === $string[ $i ] \|\| '"' === $string[ $i ] \|\| '\\' === $string[ $i ] ) && ! $this->escaped( $string, $i ) ) {
969	$this->cur_string[] = $string[ $i ];
970	$this->str_char[] = ( '(' === $string[ $i ] ) ? ')' : $string[ $i ];
971	$this->from[] = 'instr';
972	$this->quoted_string[] = ( ')' === $_str_char && '(' !== $string[ $i ] && '(' === trim( $_cur_string ) ) ? $_quoted_string : ( '(' !== $string[ $i ] );
973	continue 2;
974	}
975
976	if ( ')' !== $_str_char && ( "\n" === $string[ $i ] \|\| "\r" === $string[ $i ] ) && ! ( '\\' === $string[ $i - 1 ] && ! $this->escaped( $string, $i - 1 ) ) ) {
977	$temp_add = '\\A';
978	$this->log( 'Fixed incorrect newline in string', 'Warning' );
979	}
980
981	$_cur_string .= $temp_add;
982
983	if ( $string[ $i ] === $_str_char && ! $this->escaped( $string, $i ) ) {
984	$this->status = array_pop( $this->from );
985
986	if ( ! preg_match( '\|[' . implode( '', $this->data['csstidy']['whitespace'] ) . ']\|uis', $_cur_string ) && 'content' !== $this->property ) {
987	if ( ! $_quoted_string ) {
988	if ( ')' !== $_str_char ) {
989	// Convert properties like
990	// font-family: 'Arial';
991	// to
992	// font-family: Arial;
993	// or
994	// url("abc")
995	// to
996	// url(abc)
997	$_cur_string = substr( $_cur_string, 1, -1 );
998	}
999	} else {
1000	$_quoted_string = false;
1001	}
1002	}
1003
1004	array_pop( $this->cur_string );
1005	array_pop( $this->quoted_string );
1006	array_pop( $this->str_char );
1007
1008	if ( ')' === $_str_char ) {
1009	$_cur_string = '(' . trim( substr( $_cur_string, 1, -1 ) ) . ')';
1010	}
1011
1012	if ( 'iv' === $this->status ) {
1013	if ( ! $_quoted_string ) {
1014	if ( false !== strpos( $_cur_string, ',' ) ) {
1015	// We can on only remove space next to ','
1016	$_cur_string = implode( ',', array_map( 'trim', explode( ',', $_cur_string ) ) );
1017	}
1018	// and multiple spaces (too expensive).
1019	if ( false !== strpos( $_cur_string, ' ' ) ) {
1020	$_cur_string = preg_replace( ',\s+,', ' ', $_cur_string );
1021	}
1022	}
1023	$this->sub_value .= $_cur_string;
1024	} elseif ( 'is' === $this->status ) {
1025	$this->selector .= $_cur_string;
1026	} elseif ( 'instr' === $this->status ) {
1027	$this->cur_string[ count( $this->cur_string ) - 1 ] .= $_cur_string;
1028	}
1029	} else {
1030	$this->cur_string[ count( $this->cur_string ) - 1 ] = $_cur_string;
1031	}
1032	break;
1033	/* Case in-comment */
1034	case 'ic':
1035	if ( '*' === $string[ $i ] && '/' === $string[ $i + 1 ] ) {
1036	$this->status = array_pop( $this->from );
1037	$i++;
1038	if ( strlen( $cur_comment ) > 1 && 0 === strncmp( $cur_comment, '!', 1 ) ) {
1039	$this->_add_token( IMPORTANT_COMMENT, $cur_comment );
1040	$this->css_add_important_comment( $cur_comment );
1041	} else {
1042	$this->_add_token( COMMENT, $cur_comment );
1043	}
1044	$cur_comment = '';
1045	} else {
1046	$cur_comment .= $string[ $i ];
1047	}
1048	break;
1049	}
1050	}
1051
1052	$this->optimise->postparse();
1053	$this->print->_reset();
1054
1055	// Set locale back to original setting.
1056	@setlocale( LC_ALL, $old );
1057
1058	return ! ( empty( $this->css ) && empty( $this->import ) && empty( $this->charset ) && empty( $this->tokens ) && empty( $this->namespace ) );
1059	}
1060
1061	/**
1062	* format() in font-face needs quoted values for somes browser (FF at least).
1063	*
1064	* @since 1.0.0
1065	*
1066	* @param mixed $value Value.
1067	* @return string String.
1068	*/
1069	protected function quote_font_format( $value ) {
1070	if ( 0 === strncmp( $value, 'format', 6 ) ) {
1071	$p = strpos( $value, ')', 7 );
1072	$end = substr( $value, $p );
1073	$format_strings = $this->parse_string_list( substr( $value, 7, $p - 7 ) );
1074	if ( ! $format_strings ) {
1075	$value = '';
1076	} else {
1077	$value = 'format(';
1078	foreach ( $format_strings as $format_string ) {
1079	$value .= '"' . str_replace( '"', '\\"', $format_string ) . '",';
1080	}
1081	$value = substr( $value, 0, -1 ) . $end;
1082	}
1083	}
1084	return $value;
1085	}
1086
1087	/**
1088	* Explodes selectors.
1089	*
1090	* @since 1.0.0
1091	*/
1092	protected function explode_selectors() {
1093	// Explode multiple selectors.
1094	if ( 1 === $this->get_cfg( 'merge_selectors' ) ) {
1095	$new_sels = array();
1096	$lastpos = 0;
1097	$this->sel_separate[] = strlen( $this->selector );
1098	foreach ( $this->sel_separate as $num => $pos ) {
1099	if ( ( count( $this->sel_separate ) - 1 ) === $num ) {
1100	$pos += 1;
1101	}
1102
1103	$new_sels[] = substr( $this->selector, $lastpos, $pos - $lastpos - 1 );
1104	$lastpos = $pos;
1105	}
1106
1107	if ( count( $new_sels ) > 1 ) {
1108	foreach ( $new_sels as $selector ) {
1109	if ( isset( $this->css[ $this->at ][ $this->selector ] ) ) {
1110	$this->merge_css_blocks( $this->at, $selector, $this->css[ $this->at ][ $this->selector ] );
1111	}
1112	}
1113	unset( $this->css[ $this->at ][ $this->selector ] );
1114	}
1115	}
1116	$this->sel_separate = array();
1117	}
1118
1119	/**
1120	* Checks if a character is escaped (and returns true if it is).
1121	*
1122	* @since 1.0.0
1123	*
1124	* @param string $string String.
1125	* @param int $pos Position.
1126	* @return bool [return value]
1127	*/
1128	public function escaped( &$string, $pos ) {
1129	return $pos ? ! ( @( '\\' !== $string[ $pos - 1 ] ) \|\| $this->escaped( $string, $pos - 1 ) ) : false;
1130	}
1131
1132	/**
1133	* Add an important comment to the CSS code (one we want to keep when minifying).
1134	*
1135	* @since 1.10.0
1136	*
1137	* @param string $comment CSS Comment.
1138	*/
1139	protected function css_add_important_comment($comment) {
1140	if ( $this->get_cfg( 'preserve_css' ) \|\| '' === trim( $comment ) ) {
1141	return;
1142	}
1143	if ( ! isset( $this->css['!'] ) ) {
1144	$this->css['!'] = '';
1145	} else {
1146	$this->css['!'] .= "\n";
1147	}
1148	$this->css['!'] .= $comment;
1149	}
1150
1151	/**
1152	* Adds a property with value to the existing CSS code.
1153	*
1154	* @since 1.0.0
1155	*
1156	* @param string $media Media.
1157	* @param string $selector Selector.
1158	* @param string $property Property.
1159	* @param string $new_val New value.
1160	*/
1161	protected function css_add_property( $media, $selector, $property, $new_val ) {
1162	if ( $this->get_cfg( 'preserve_css' ) \|\| '' === trim( $new_val ) ) {
1163	return;
1164	}
1165
1166	$this->added = true;
1167	if ( isset( $this->css[ $media ][ $selector ][ $property ] ) ) {
1168	if ( ( $this->is_important( $this->css[ $media ][ $selector ][ $property ] ) && $this->is_important( $new_val ) ) \|\| ! $this->is_important( $this->css[ $media ][ $selector ][ $property ] ) ) {
1169	$this->css[ $media ][ $selector ][ $property ] = trim( $new_val );
1170	}
1171	} else {
1172	$this->css[ $media ][ $selector ][ $property ] = trim( $new_val );
1173	}
1174	}
1175
1176	/**
1177	* Check if a current media section is the continuation of the last one.
1178	* If not increase the name of the media section to avoid a merging.
1179	*
1180	* @since 1.10.0
1181	*
1182	* @param int\|string $media Media.
1183	* @return int\|string [return value]
1184	*/
1185	protected function css_check_last_media_section_or_inc( $media ) {
1186	// Are we starting?
1187	if ( ! $this->css \|\| ! is_array( $this->css ) \|\| empty( $this->css ) ) {
1188	return $media;
1189	}
1190	// If the last @media is the same as this, keep it.
1191	end( $this->css );
1192	$at = key( $this->css );
1193	if ( $at === $media ) {
1194	return $media;
1195	}
1196	// Otherwise increase the section in the array.
1197	while ( isset( $this->css[ $media ] ) ) {
1198	if ( is_numeric( $media ) ) {
1199	$media++;
1200	} else {
1201	$media .= ' ';
1202	}
1203	}
1204	return $media;
1205	}
1206
1207	/**
1208	* Start a new media section.
1209	*
1210	* Check if the media is not already known, else rename it with extra spaces to avoid merging.
1211	*
1212	* @since 1.0.0
1213	*
1214	* @param string $current_media Media.
1215	* @param string $media Media.
1216	* @param bool $at_root
1217	* @return string [return value]
1218	*/
1219	protected function css_new_media_section( $current_media, $new_media, $at_root = false ) {
1220	if ( $this->get_cfg( 'preserve_css' ) ) {
1221	return $new_media;
1222	}
1223	// If we already are in a media and CSS level is 3, manage nested medias.
1224	if ( $current_media
1225	&& ! $at_root
1226	// numeric $current_media means DEFAULT_AT or inc
1227	&& ! is_numeric( $current_media )
1228	&& 0 === strncmp( $this->get_cfg( 'css_level' ), 'CSS3', 4 ) ) {
1229	$new_media = rtrim( $current_media ) . '{' . rtrim( $new_media );
1230	}
1231	return $this->css_check_last_media_section_or_inc( $new_media );
1232	}
1233
1234	/**
1235	* Close a media section.
1236	*
1237	* Find the parent media we were in before or the root.
1238	*
1239	* @since 1.10.0
1240	*
1241	* @param string $current_media Current Media.
1242	* @return string [return value]
1243	*/
1244	protected function css_close_media_section( $current_media ) {
1245	if ( $this->get_cfg( 'preserve_css' ) ) {
1246	return '';
1247	}
1248	if ( false !== strpos( $current_media, '{' ) ) {
1249	$current_media = explode( '{', $current_media );
1250	array_pop( $current_media );
1251	$current_media = implode( '{', $current_media );
1252	return $current_media;
1253	}
1254
1255	return '';
1256	}
1257
1258	/**
1259	* Start a new selector.
1260	*
1261	* If already referenced in this media section, rename it with extra space to avoid merging,
1262	* except if merging is required, or last selector is the same (merge siblings).
1263	* Never merge @font-face.
1264	*
1265	* @since 1.0.0
1266	*
1267	* @param string $media Media.
1268	* @param string $selector Selector.
1269	* @return string [return value]
1270	*/
1271	protected function css_new_selector( $media, $selector ) {
1272	if ( $this->get_cfg( 'preserve_css' ) ) {
1273	return $selector;
1274	}
1275	$selector = trim( $selector );
1276	if ( 0 !== strncmp( $selector, '@font-face', 10 ) ) {
1277	if ( false !== $this->settings['merge_selectors'] ) {
1278	return $selector;
1279	}
1280
1281	if ( ! $this->css \|\| ! isset( $this->css[ $media ] ) \|\| ! $this->css[ $media ] ) {
1282	return $selector;
1283	}
1284
1285	// If last is the same, keep it.
1286	end( $this->css[ $media ] );
1287	$sel = key( $this->css[ $media ] );
1288	if ( $sel === $selector ) {
1289	return $selector;
1290	}
1291	}
1292
1293	while ( isset( $this->css[ $media ][ $selector ] ) ) {
1294	$selector .= ' ';
1295	}
1296	return $selector;
1297	}
1298
1299	/**
1300	* Start a new property.
1301	*
1302	* If already references in this selector, rename it with extra space to avoid override.
1303	*
1304	* @since 1.0.0
1305	*
1306	* @param string $media Media.
1307	* @param string $selector Selector.
1308	* @param string $property Property.
1309	* @return string [return value]
1310	*/
1311	protected function css_new_property( $media, $selector, $property ) {
1312	if ( $this->get_cfg( 'preserve_css' ) ) {
1313	return $property;
1314	}
1315	if ( ! $this->css \|\| ! isset( $this->css[ $media ][ $selector ] ) \|\| ! $this->css[ $media ][ $selector ] ) {
1316	return $property;
1317	}
1318
1319	while ( isset( $this->css[ $media ][ $selector ][ $property ] ) ) {
1320	$property .= ' ';
1321	}
1322
1323	return $property;
1324	}
1325
1326	/**
1327	* Adds CSS to an existing media/selector.
1328	*
1329	* @since 1.0.0
1330	*
1331	* @param string $media Media.
1332	* @param string $selector Selector.
1333	* @param array $css_add Additional CSS.
1334	*/
1335	public function merge_css_blocks( $media, $selector, array $css_add ) {
1336	foreach ( $css_add as $property => $value ) {
1337	$this->css_add_property( $media, $selector, $property, $value );
1338	}
1339	}
1340
1341	/**
1342	* Checks if $value is !important.
1343	*
1344	* @since 1.0.0
1345	*
1346	* @param string $value Value.
1347	* @return bool Whether the value has the !important keyword.
1348	*/
1349	public function is_important( &$value ) {
1350	return (
1351	false !== strpos( $value, '!' ) // Quick test.
1352	&& ! strcasecmp( substr( str_replace( $this->data['csstidy']['whitespace'], '', $value ), -10, 10 ), '!important' ) );
1353	}
1354
1355	/**
1356	* Returns a value without !important.
1357	*
1358	* @since 1.0.0
1359	*
1360	* @param string $value Value.
1361	* @return string Value without the !important;
1362	*/
1363	public function gvw_important( $value ) {
1364	if ( $this->is_important( $value ) ) {
1365	$value = trim( $value );
1366	$value = substr( $value, 0, -9 );
1367	$value = trim( $value );
1368	$value = substr( $value, 0, -1 );
1369	$value = trim( $value );
1370	return $value;
1371	}
1372	return $value;
1373	}
1374
1375	/**
1376	* Checks if the next word in a string from pos is a CSS property.
1377	*
1378	* @since 1.0.0
1379	*
1380	* @param string $istring String.
1381	* @param int $pos Position.
1382	* @return bool [return value]
1383	*/
1384	protected function property_is_next( $istring, $pos ) {
1385	$all_properties = &$this->data['csstidy']['all_properties'];
1386	$istring = substr( $istring, $pos, strlen( $istring ) - $pos );
1387	$pos = strpos( $istring, ':' );
1388	if ( false === $pos ) {
1389	return false;
1390	}
1391	$istring = strtolower( trim( substr( $istring, 0, $pos ) ) );
1392	if ( isset( $all_properties[ $istring ] ) ) {
1393	$this->log( 'Added semicolon to the end of declaration', 'Warning' );
1394	return true;
1395	}
1396	return false;
1397	}
1398
1399	/**
1400	* Checks if a property is valid.
1401	*
1402	* @since 1.0.0
1403	*
1404	* @param string $property Property.
1405	* @return bool Whether the property is valid.
1406	*/
1407	public function property_is_valid( $property ) {
1408	$property = strtolower( $property );
1409	if ( in_array( trim( $property ), $this->data['csstidy']['multiple_properties'], true ) ) {
1410	$property = trim( $property );
1411	}
1412	$all_properties = &$this->data['csstidy']['all_properties'];
1413	return isset( $all_properties[ $property ] ) && false !== strpos( $all_properties[ $property ], strtoupper( $this->get_cfg( 'css_level' ) ) );
1414	}
1415
1416	/**
1417	* Accepts a list of strings (e.g. the argument to format() in a @font-face src property)
1418	* and returns a list of the strings. Converts things like:
1419	* format(abc) => format("abc")
1420	* format(abc def) => format("abc","def")
1421	* format(abc "def") => format("abc","def")
1422	* format(abc, def, ghi) => format("abc","def","ghi")
1423	* format("abc",'def') => format("abc","def")
1424	* format("abc, def, ghi") => format("abc, def, ghi")
1425	*
1426	* @since 1.0.0
1427	*
1428	* @param [type] $value [description]
1429	* @return [type] [description]
1430	*/
1431	public function parse_string_list( $value ) {
1432	$value = trim( $value );
1433
1434	// Case: empty
1435	if ( ! $value ) {
1436	return array();
1437	}
1438
1439	$strings = array();
1440
1441	$in_str = false;
1442	$current_string = '';
1443
1444	for ( $i = 0, $_len = strlen( $value ); $i < $_len; $i++ ) {
1445	if ( ( ',' === $value[ $i ] \|\| ' ' === $value[ $i ] ) && true === $in_str ) {
1446	$in_str = false;
1447	$strings[] = $current_string;
1448	$current_string = '';
1449	} elseif ( '"' === $value[ $i ] \|\| "'" === $value[ $i ] ) {
1450	if ( $in_str === $value[ $i ] ) {
1451	$strings[] = $current_string;
1452	$in_str = false;
1453	$current_string = '';
1454	continue;
1455	} elseif ( ! $in_str ) {
1456	$in_str = $value[ $i ];
1457	}
1458	} else {
1459	if ( $in_str ) {
1460	$current_string .= $value[ $i ];
1461	} else {
1462	if ( ! preg_match( '/[\s,]/', $value[ $i ] ) ) {
1463	$in_str = true;
1464	$current_string = $value[ $i ];
1465	}
1466	}
1467	}
1468	}
1469
1470	if ( $current_string ) {
1471	$strings[] = $current_string;
1472	}
1473
1474	return $strings;
1475	}
1476
1477	} // class TablePress_CSSTidy
1478