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source: trunk/include/cssmin.class.php @ 11739

Last change on this file since 11739 was 8170, checked in by rvelices, 14 years ago
combined css and js are minified
Property svn:eol-style set to `LF` Property svn:keywords set to `Author Date Id Revision`
File size: 24.6 KB

Line
1	<?php
2	/**
3	* CssMin - A (simple) css minifier with benefits
4	*
5	* --
6	*
7	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
8	* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
9	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
10	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
11	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
12	* --
13	*
14	* @package CssMin
15	* @author Joe Scylla <joe.scylla@gmail.com>
16	* @copyright 2008 - 2010 Joe Scylla <joe.scylla@gmail.com>
17	* @license http://opensource.org/licenses/mit-license.php MIT License
18	* @version 2.0.1.0064 (2010-09-30)
19	*/
20	class CssMin
21	{
22	/**
23	* State: Is in document
24	*
25	* @var integer
26	*/
27	const T_DOCUMENT = 1;
28	/**
29	* Token: Comment
30	*
31	* @var integer
32	*/
33	const T_COMMENT = 2;
34	/**
35	* Token: Generic at-rule
36	*
37	* @var integer
38	*/
39	const T_AT_RULE = 3;
40	/**
41	* Token: Start of @media block
42	*
43	* @var integer
44	*/
45	const T_AT_MEDIA_START = 4;
46	/**
47	* State: Is in @media block
48	*
49	* @var integer
50	*/
51	const T_AT_MEDIA = 5;
52	/**
53	* Token: End of @media block
54	*
55	* @var integer
56	*/
57	const T_AT_MEDIA_END = 6;
58	/**
59	* Token: Start of @font-face block
60	*
61	* @var integer
62	*/
63	const T_AT_FONT_FACE_START = 7;
64	/**
65	* State: Is in @font-face block
66	*
67	* @var integer
68	*/
69	const T_AT_FONT_FACE = 8;
70	/**
71	* Token: @font-face declaration
72	*
73	* @var integer
74	*/
75	const T_FONT_FACE_DECLARATION = 9;
76	/**
77	* Token: End of @font-face block
78	*
79	* @var integer
80	*/
81	const T_AT_FONT_FACE_END = 10;
82	/**
83	* Token: Start of @page block
84	*
85	* @var integer
86	*/
87	const T_AT_PAGE_START = 11;
88	/**
89	* State: Is in @page block
90	*
91	* @var integer
92	*/
93	const T_AT_PAGE = 12;
94	/**
95	* Token: @page declaration
96	*
97	* @var integer
98	*/
99	const T_PAGE_DECLARATION = 13;
100	/**
101	* Token: End of @page block
102	*
103	* @var integer
104	*/
105	const T_AT_PAGE_END = 14;
106	/**
107	* Token: Start of ruleset
108	*
109	* @var integer
110	*/
111	const T_RULESET_START = 15;
112	/**
113	* Token: Ruleset selectors
114	*
115	* @var integer
116	*/
117	const T_SELECTORS = 16;
118	/**
119	* Token: Start of declarations
120	*
121	* @var integer
122	*/
123	const T_DECLARATIONS_START = 17;
124	/**
125	* State: Is in declarations
126	*
127	* @var integer
128	*/
129	const T_DECLARATIONS = 18;
130	/**
131	* Token: Declaration
132	*
133	* @var integer
134	*/
135	const T_DECLARATION = 19;
136	/**
137	* Token: End of declarations
138	*
139	* @var integer
140	*/
141	const T_DECLARATIONS_END = 20;
142	/**
143	* Token: End of ruleset
144	*
145	* @var integer
146	*/
147	const T_RULESET_END = 21;
148	/**
149	* Token: Start of @variables block
150	*
151	* @var integer
152	*/
153	const T_AT_VARIABLES_START = 100;
154	/**
155	* State: Is in @variables block
156	*
157	* @var integer
158	*/
159	const T_AT_VARIABLES = 101;
160	/**
161	* Token: @variables declaration
162	*
163	* @var integer
164	*/
165	const T_VARIABLE_DECLARATION = 102;
166	/**
167	* Token: End of @variables block
168	*
169	* @var integer
170	*/
171	const T_AT_VARIABLES_END = 103;
172	/**
173	* State: Is in string
174	*
175	* @var integer
176	*/
177	const T_STRING = 254;
178	/**
179	* State: Is in url string property
180	*
181	* @var integer
182	*/
183	const T_STRING_URL = 255;
184	/**
185	* Css transformations table
186	*
187	* @var array
188	*/
189	private static $transformations = array
190	(
191	"border-radius" => array("-moz-border-radius", "-webkit-border-radius", "-khtml-border-radius"),
192	"border-top-left-radius" => array("-moz-border-radius-topleft", "-webkit-border-top-left-radius", "-khtml-top-left-radius"),
193	"border-top-right-radius" => array("-moz-border-radius-topright", "-webkit-border-top-right-radius", "-khtml-top-right-radius"),
194	"border-bottom-right-radius" => array("-moz-border-radius-bottomright", "-webkit-border-bottom-right-radius", "-khtml-border-bottom-right-radius"),
195	"border-bottom-left-radius" => array("-moz-border-radius-bottomleft", "-webkit-border-bottom-left-radius", "-khtml-border-bottom-left-radius"),
196	"box-shadow" => array("-moz-box-shadow", "-webkit-box-shadow", "-khtml-box-shadow"),
197	"opacity" => array(array("CssMin", "_tOpacity")),
198	"text-shadow" => array("-moz-text-shadow", "-webkit-text-shadow", "-khtml-text-shadow"),
199	"white-space" => array(array("CssMin", "_tWhiteSpacePreWrap"))
200	);
201	/**
202	* Minifies the Css.
203	*
204	* @param string $css
205	* @param array $config [optional]
206	* @return string
207	*/
208	public static function minify($css, $config = array())
209	{
210	$tokens = self::parse($css);
211	$config = array_merge(array
212	(
213	"remove-empty-blocks" => true,
214	"remove-empty-rulesets" => true,
215	"remove-last-semicolons" => true,
216	"convert-css3-properties" => false,
217	"convert-color-values" => false,
218	"compress-color-values" => false,
219	"compress-unit-values" => false,
220	"emulate-css3-variables" => true,
221	), $config);
222	// Minification options
223	$sRemoveEmptyBlocks = $config["remove-empty-blocks"];
224	$sRemoveEmptyRulesets = $config["remove-empty-rulesets"];
225	$sRemoveLastSemicolon = $config["remove-last-semicolons"];
226	$sConvertCss3Properties = $config["convert-css3-properties"];
227	$sCompressUnitValues = $config["compress-unit-values"];
228	$sConvertColorValues = $config["convert-color-values"];
229	$sCompressColorValues = $config["compress-color-values"];
230	$sEmulateCcss3Variables = $config["emulate-css3-variables"];
231	$sRemoveTokens = array(self::T_COMMENT);
232	// Remove tokens
233	if (!$sEmulateCcss3Variables)
234	{
235	$sRemoveTokens = array_merge($sRemoveTokens, array(self::T_AT_VARIABLES_START, self::T_VARIABLE_DECLARATION, self::T_AT_VARIABLES_END));
236	}
237	for($i = 0, $l = count($tokens); $i < $l; $i++)
238	{
239	if (in_array($tokens[$i][0], $sRemoveTokens))
240	{
241	unset($tokens[$i]);
242	}
243	}
244	$tokens = array_values($tokens);
245	// Remove empty rulesets
246	if ($sRemoveEmptyRulesets)
247	{
248	for($i = 0, $l = count($tokens); $i < $l; $i++)
249	{
250	// Remove empty rulesets
251	if ($tokens[$i][0] == self::T_RULESET_START && $tokens[$i+4][0] == self::T_RULESET_END)
252	{
253	unset($tokens[$i]); // T_RULESET_START
254	unset($tokens[++$i]); // T_SELECTORS
255	unset($tokens[++$i]); // T_DECLARATIONS_START
256	unset($tokens[++$i]); // T_DECLARATIONS_END
257	unset($tokens[++$i]); // T_RULESET_END
258	}
259	}
260	$tokens = array_values($tokens);
261	}
262	// Remove empty @media, @font-face or @page blocks
263	if ($sRemoveEmptyBlocks)
264	{
265	for($i = 0, $l = count($tokens); $i < $l; $i++)
266	{
267	// Remove empty @media, @font-face or @page blocks
268	if (($tokens[$i][0] == self::T_AT_MEDIA_START && $tokens[$i+1][0] == self::T_AT_MEDIA_END)
269	\|\| ($tokens[$i][0] == self::T_AT_FONT_FACE_START && $tokens[$i+1][0] == self::T_AT_FONT_FACE_END)
270	\|\| ($tokens[$i][0] == self::T_AT_PAGE_START && $tokens[$i+1][0] == self::T_AT_PAGE_END))
271	{
272	unset($tokens[$i]); // T_AT_MEDIA_START, T_AT_FONT_FACE_START, T_AT_PAGE_START
273	unset($tokens[++$i]); // T_AT_MEDIA_END, T_AT_FONT_FACE_END, T_AT_PAGE_END
274	}
275	}
276	$tokens = array_values($tokens);
277	}
278	// CSS Level 3 variables: parse variables
279	if ($sEmulateCcss3Variables)
280	{
281	// Parse variables
282	$variables = array();
283	for($i = 0, $l = count($tokens); $i < $l; $i++)
284	{
285	if ($tokens[$i][0] == self::T_VARIABLE_DECLARATION)
286	{
287	for($i2 = 0, $l2 = count($tokens[$i][3]); $i2 < $l2; $i2++)
288	{
289	if (!isset($variables[$tokens[$i][3][$i2]]))
290	{
291	$variables[$tokens[$i][3][$i2]] = array();
292	}
293	$variables[$tokens[$i][3][$i2]][$tokens[$i][1]] = $tokens[$i][2];
294	}
295	}
296	}
297	}
298	// Conversion and compression
299	for($i = 0, $l = count($tokens); $i < $l; $i++)
300	{
301	if ($tokens[$i][0] == self::T_DECLARATION)
302	{
303	// CSS Level 3 variables
304	if ($sEmulateCcss3Variables)
305	{
306	if (substr($tokens[$i][2], 0, 4) == "var(" && substr($tokens[$i][2], -1, 1) == ")")
307	{
308	$tokens[$i][3][] = "all";
309	$variable = trim(substr($tokens[$i][2], 4, -1));
310	for($i2 = 0, $l2 = count($tokens[$i][3]); $i2 < $l2; $i2++)
311	{
312	if (isset($variables[$tokens[$i][3][$i2]][$variable]))
313	{
314	$tokens[$i][2] = $variables[$tokens[$i][3][$i2]][$variable];
315	break;
316	}
317	}
318	}
319	}
320	// Compress unit values
321	if ($sCompressUnitValues)
322	{
323	// Compress "0.5px" to ".5px"
324	$tokens[$i][2] = preg_replace("/(^\| \|-)0\.([0-9]+)(%\|em\|ex\|px\|in\|cm\|mm\|pt\|pc)/iS", "\${1}.\${2}\${3}", $tokens[$i][2]);
325	// Compress "0px" to "0"
326	$tokens[$i][2] = preg_replace("/(^\| )-?(\.?)0(%\|em\|ex\|px\|in\|cm\|mm\|pt\|pc)/iS", "\${1}0", $tokens[$i][2]);
327	// Compress "0 0 0 0" to "0"
328	if ($tokens[$i][2] == "0 0 0 0") {$tokens[$i][2] = "0";}
329	}
330	// Convert RGB color values to hex ("rgb(200,60%,5)" => "#c89905")
331	if ($sConvertColorValues && preg_match("/rgb\s\(\s([0-9%]+)\s,\s([0-9%]+)\s,\s([0-9%]+)\s*\)/iS", $tokens[$i][2], $m))
332	{
333	for ($i2 = 1, $l2 = count($m); $i2 < $l2; $i2++)
334	{
335	if (strpos("%", $m[$i2]) !== false)
336	{
337	$m[$i2] = substr($m[$i2], 0, -1);
338	$m[$i2] = (int) (256 * ($m[$i2] / 100));
339	}
340	$m[$i2] = str_pad(dechex($m[$i2]), 2, "0", STR_PAD_LEFT);
341	}
342	$tokens[$i][2] = str_replace($m[0], "#" . $m[1] . $m[2] . $m[3], $tokens[$i][2]);
343	}
344	// Compress color values ("#aabbcc" to "#abc")
345	if ($sCompressColorValues && preg_match("/\#([0-9a-f]{6})/iS", $tokens[$i][2], $m))
346	{
347	$m[1] = strtolower($m[1]);
348	if (substr($m[1], 0, 1) == substr($m[1], 1, 1) && substr($m[1], 2, 1) == substr($m[1], 3, 1) && substr($m[1], 4, 1) == substr($m[1], 5, 1))
349	{
350	$tokens[$i][2] = str_replace($m[0], "#" . substr($m[1], 0, 1) . substr($m[1], 2, 1) . substr($m[1], 4, 1), $tokens[$i][2]);
351	}
352	}
353	}
354	}
355	// Create minified css
356	$r = "";
357	for($i = 0, $l = count($tokens); $i < $l; $i++)
358	{
359	// T_AT_RULE
360	if ($tokens[$i][0] == self::T_AT_RULE)
361	{
362	$r .= "@" . $tokens[$i][1] . " " . $tokens[$i][2] . ";";
363	}
364	// T_AT_MEDIA_START
365	elseif ($tokens[$i][0] == self::T_AT_MEDIA_START)
366	{
367	if (count($tokens[$i][1]) == 1 && $tokens[$i][1][0] == "all")
368	{
369	$r .= "@media{";
370	}
371	else
372	{
373	$r .= "@media " . implode(",", $tokens[$i][1]) . "{";
374	}
375	}
376	// T_AT_FONT_FACE_START
377	elseif ($tokens[$i][0] == self::T_AT_FONT_FACE_START)
378	{
379	$r .= "@font-face{";
380	}
381	// T_FONT_FACE_DECLARATION
382	elseif ($tokens[$i][0] == self::T_FONT_FACE_DECLARATION)
383	{
384	$r .= $tokens[$i][1] . ":" . $tokens[$i][2] . ($sRemoveLastSemicolon && $tokens[$i+1][0] == self::T_AT_FONT_FACE_END ? "" : ";");
385	}
386	// T_AT_PAGE_START
387	elseif ($tokens[$i][0] == self::T_AT_PAGE_START)
388	{
389	$r .= "@page{";
390	}
391	// T_PAGE_DECLARATION
392	elseif ($tokens[$i][0] == self::T_PAGE_DECLARATION)
393	{
394	$r .= $tokens[$i][1] . ":" . $tokens[$i][2] . ($sRemoveLastSemicolon && $tokens[$i+1][0] == self::T_AT_PAGE_END ? "" : ";");
395	}
396	// T_SELECTORS
397	elseif ($tokens[$i][0] == self::T_SELECTORS)
398	{
399	$r .= implode(",", $tokens[$i][1]);
400	}
401	// Start of declarations
402	elseif ($tokens[$i][0] == self::T_DECLARATIONS_START)
403	{
404	$r .= "{";
405	}
406	// T_DECLARATION
407	elseif ($tokens[$i][0] == self::T_DECLARATION)
408	{
409	if ($sConvertCss3Properties && isset(self::$transformations[$tokens[$i][1]]))
410	{
411	foreach (self::$transformations[$tokens[$i][1]] as $value)
412	{
413	if (!is_array($value))
414	{
415	$r .= $value . ":" . $tokens[$i][2] . ";";
416	}
417	elseif (is_array($value) && is_callable($value))
418	{
419	$r.= call_user_func_array($value, array($tokens[$i][1], $tokens[$i][2]));
420
421	}
422	}
423	}
424	$r .= $tokens[$i][1] . ":" . $tokens[$i][2] . ($sRemoveLastSemicolon && $tokens[$i+1][0] == self::T_DECLARATIONS_END ? "" : ";");
425	}
426	// T_DECLARATIONS_END, T_AT_MEDIA_END, T_AT_FONT_FACE_END, T_AT_PAGE_END
427	elseif (in_array($tokens[$i][0], array(self::T_DECLARATIONS_END, self::T_AT_MEDIA_END, self::T_AT_FONT_FACE_END, self::T_AT_PAGE_END)))
428	{
429	$r .= "}";
430	}
431	else
432	{
433	// Tokens with no output:
434	// T_COMMENT
435	// T_RULESET_START
436	// T_RULESET_END
437	// T_AT_VARIABLES_START
438	// T_VARIABLE_DECLARATION
439	// T_AT_VARIABLES_END
440	}
441	}
442	return $r;
443	}
444	/**
445	* Parses the Css and returns a array of tokens.
446	*
447	* @param string $css
448	* @return array
449	*/
450	public static function parse($css)
451	{
452	// Settings
453	$sDefaultScope = array("all"); // Default scope
454	$sDefaultTrim = " \t\n\r\0\x0B"; // Default trim charlist
455	$sTokenChars = "@{}();:\n\"'/*,"; // Tokens triggering parser processing
456	// Basic variables
457	$c = null; // Current char
458	$p = null; // Previous char
459	$buffer = ""; // Buffer
460	$state = array(self::T_DOCUMENT); // State stack
461	$currentState = self::T_DOCUMENT; // Current state
462	$scope = $sDefaultScope; // Current scope
463	$stringChar = null; // String delimiter char
464	$isFilterWs = true; // Filter double whitespaces?
465	$selectors = array(); // Array with collected selectors
466	$r = array(); // Return value
467	// Prepare css
468	$css = str_replace("\r\n", "\n", $css); // Windows to Unix line endings
469	$css = str_replace("\r", "\n", $css); // Mac to Unix line endings
470	while (strpos($css, "\n\n") !== false)
471	{
472	$css = str_replace("\n\n", "\n", $css); // Remove double line endings
473	}
474	$css = str_replace("\t", " ", $css); // Convert tabs to spaces
475	// Parse css
476	for ($i = 0, $l = strlen($css); $i < $l; $i++)
477	{
478	$c = substr($css, $i, 1);
479	// Filter out double spaces
480	if ($isFilterWs && $c == " " && $c == $p)
481	{
482	continue;
483	}
484	$buffer .= $c;
485	if (strpos($sTokenChars, $c) !== false)
486	{
487	//
488	$currentState = $state[count($state) - 1];
489	/*
490	* Start of comment
491	*/
492	if ($p == "/" && $c == "*" && $currentState != self::T_STRING && $currentState != self::T_COMMENT)
493	{
494	$saveBuffer = substr($buffer, 0, -2); // save the buffer (will get restored with comment ending)
495	$buffer = $c;
496	$isFilterWs = false;
497	array_push($state, self::T_COMMENT);
498	}
499	/*
500	* End of comment
501	*/
502	elseif ($p == "*" && $c == "/" && $currentState == self::T_COMMENT)
503	{
504	$r[] = array(self::T_COMMENT, trim($buffer));
505	$buffer = $saveBuffer;
506	$isFilterWs = true;
507	array_pop($state);
508	}
509	/*
510	* Start of string
511	*/
512	elseif (($c == "\"" \|\| $c == "'") && $currentState != self::T_STRING && $currentState != self::T_COMMENT && $currentState != self::T_STRING_URL)
513	{
514	$stringChar = $c;
515	$isFilterWs = false;
516	array_push($state, self::T_STRING);
517	}
518	/**
519	* Escaped LF in string => remove escape backslash and LF
520	*/
521	elseif ($c == "\n" && $p == "\\" && $currentState == self::T_STRING)
522	{
523	$buffer = substr($buffer, 0, -2);
524	}
525	/*
526	* End of string
527	*/
528	elseif ($c === $stringChar && $currentState == self::T_STRING)
529	{
530	if ($p == "\\") // Previous char is a escape char
531	{
532	$count = 1;
533	$i2 = $i -2;
534	while (substr($css, $i2, 1) == "\\")
535	{
536	$count++;
537	$i2--;
538	}
539	// if count of escape chars is uneven => continue with string...
540	if ($count % 2)
541	{
542	continue;
543	}
544	}
545	// ...else end the string
546	$isFilterWs = true;
547	array_pop($state);
548	$stringChar = null;
549	}
550	/**
551	* Start of url string property
552	*/
553	elseif ($c == "(" && ($currentState != self::T_COMMENT && $currentState != self::T_STRING) && strtolower(substr($css, $i - 3, 3) == "url")
554	&& ($currentState == self::T_DECLARATION \|\| $currentState == self::T_FONT_FACE_DECLARATION \|\| $currentState == self::T_PAGE_DECLARATION \|\| $currentState == self::T_VARIABLE_DECLARATION))
555	{
556	array_push($state, self::T_STRING_URL);
557	}
558	/**
559	* End of url string property
560	*/
561	elseif (($c == ")" \|\| $c == "\n") && ($currentState != self::T_COMMENT && $currentState != self::T_STRING) && $currentState == self::T_STRING_URL)
562	{
563	if ($p == "\\")
564	{
565	continue;
566	}
567	array_pop($state);
568	}
569	/*
570	* Start of at-rule @media block
571	*/
572	elseif ($c == "@" && $currentState == self::T_DOCUMENT && strtolower(substr($css, $i, 6)) == "@media")
573	{
574	$i = $i + 6;
575	$buffer = "";
576	array_push($state, self::T_AT_MEDIA_START);
577	}
578	/*
579	* At-rule @media block media types
580	*/
581	elseif ($c == "{" && $currentState == self::T_AT_MEDIA_START)
582	{
583	$buffer = strtolower(trim($buffer, $sDefaultTrim . "{"));
584	$scope = $buffer != "" ? array_filter(array_map("trim", explode(",", $buffer))) : $sDefaultScope;
585	$r[] = array(self::T_AT_MEDIA_START, $scope);
586	$i = $i++;
587	$buffer = "";
588	array_pop($state);
589	array_push($state, self::T_AT_MEDIA);
590	}
591	/*
592	* End of at-rule @media block
593	*/
594	elseif ($currentState == self::T_AT_MEDIA && $c == "}")
595	{
596	$r[] = array(self::T_AT_MEDIA_END);
597	$scope = $sDefaultScope;
598	$buffer = "";
599	array_pop($state);
600	}
601	/*
602	* Start of at-rule @font-face block
603	*/
604	elseif ($c == "@" && $currentState == self::T_DOCUMENT && strtolower(substr($css, $i, 10)) == "@font-face")
605	{
606	$r[] = array(self::T_AT_FONT_FACE_START);
607	$i = $i + 10;
608	$buffer = "";
609	array_push($state, self::T_AT_FONT_FACE);
610	}
611	/*
612	* @font-face declaration: Property
613	*/
614	elseif ($c == ":" && $currentState == self::T_AT_FONT_FACE)
615	{
616	$property = trim($buffer, $sDefaultTrim . ":{");
617	$buffer = "";
618	array_push($state, self::T_FONT_FACE_DECLARATION);
619	}
620	/*
621	* @font-face declaration: Value
622	*/
623	elseif (($c == ";" \|\| $c == "}" \|\| $c == "\n") && $currentState == self::T_FONT_FACE_DECLARATION)
624	{
625	$value = trim($buffer, $sDefaultTrim . ";}");
626	$r[] = array(self::T_FONT_FACE_DECLARATION, $property, $value, $scope);
627	$buffer = "";
628	array_pop($state);
629	if ($c == "}") // @font-face declaration closed with a right curly brace => closes @font-face block
630	{
631	array_pop($state);
632	$r[] = array(self::T_AT_FONT_FACE_END);
633	}
634	}
635	/*
636	* End of at-rule @font-face block
637	*/
638	elseif ($c == "}" && $currentState == self::T_AT_FONT_FACE)
639	{
640	$r[] = array(self::T_AT_FONT_FACE_END);
641	$buffer = "";
642	array_pop($state);
643	}
644	/*
645	* Start of at-rule @page block
646	*/
647	elseif ($c == "@" && $currentState == self::T_DOCUMENT && strtolower(substr($css, $i, 5)) == "@page")
648	{
649	$r[] = array(self::T_AT_PAGE_START);
650	$i = $i + 5;
651	$buffer = "";
652	array_push($state, self::T_AT_PAGE);
653	}
654	/*
655	* @page declaration: Property
656	*/
657	elseif ($c == ":" && $currentState == self::T_AT_PAGE)
658	{
659	$property = trim($buffer, $sDefaultTrim . ":{");
660	$buffer = "";
661	array_push($state, self::T_PAGE_DECLARATION);
662	}
663	/*
664	* @page declaration: Value
665	*/
666	elseif (($c == ";" \|\| $c == "}" \|\| $c == "\n") && $currentState == self::T_PAGE_DECLARATION)
667	{
668	$value = trim($buffer, $sDefaultTrim . ";}");
669	$r[] = array(self::T_PAGE_DECLARATION, $property, $value, $scope);
670	$buffer = "";
671	array_pop($state);
672	if ($c == "}") // @page declaration closed with a right curly brace => closes @font-face block
673	{
674	array_pop($state);
675	$r[] = array(self::T_AT_PAGE_END);
676	}
677	}
678	/*
679	* End of at-rule @page block
680	*/
681	elseif ($c == "}" && $currentState == self::T_AT_PAGE)
682	{
683	$r[] = array(self::T_AT_PAGE_END);
684	$buffer = "";
685	array_pop($state);
686	}
687	/*
688	* Start of at-rule @variables block
689	*/
690	elseif ($c == "@" && $currentState == self::T_DOCUMENT && strtolower(substr($css, $i, 10)) == "@variables")
691	{
692	$i = $i + 10;
693	$buffer = "";
694	array_push($state, self::T_AT_VARIABLES_START);
695	}
696	/*
697	* @variables media types
698	*/
699	elseif ($c == "{" && $currentState == self::T_AT_VARIABLES_START)
700	{
701	$buffer = strtolower(trim($buffer, $sDefaultTrim . "{"));
702	$r[] = array(self::T_AT_VARIABLES_START, $scope);
703	$scope = $buffer != "" ? array_filter(array_map("trim", explode(",", $buffer))) : $sDefaultScope;
704	$i = $i++;
705	$buffer = "";
706	array_pop($state);
707	array_push($state, self::T_AT_VARIABLES);
708	}
709	/*
710	* @variables declaration: Property
711	*/
712	elseif ($c == ":" && $currentState == self::T_AT_VARIABLES)
713	{
714	$property = trim($buffer, $sDefaultTrim . ":");
715	$buffer = "";
716	array_push($state, self::T_VARIABLE_DECLARATION);
717	}
718	/*
719	* @variables declaration: Value
720	*/
721	elseif (($c == ";" \|\| $c == "}" \|\| $c == "\n") && $currentState == self::T_VARIABLE_DECLARATION)
722	{
723	$value = trim($buffer, $sDefaultTrim . ";}");
724	$r[] = array(self::T_VARIABLE_DECLARATION, $property, $value, $scope);
725	$buffer = "";
726	array_pop($state);
727	if ($c == "}") // @variable declaration closed with a right curly brace => closes @variables block
728	{
729	array_pop($state);
730	$r[] = array(self::T_AT_VARIABLES_END);
731	$scope = $sDefaultScope;
732	}
733	}
734	/*
735	* End of at-rule @variables block
736	*/
737	elseif ($c == "}" && $currentState == self::T_AT_VARIABLES)
738	{
739	$r[] = array(self::T_AT_VARIABLES_END);
740	$scope = $sDefaultScope;
741	$buffer = "";
742	array_pop($state);
743	}
744	/*
745	* Start of document level at-rule
746	*/
747	elseif ($c == "@" && $currentState == self::T_DOCUMENT)
748	{
749	$buffer = "";
750	array_push($state, self::T_AT_RULE);
751	}
752	/*
753	* End of document level at-rule
754	*/
755	elseif ($c == ";" && $currentState == self::T_AT_RULE)
756	{
757	$pos = strpos($buffer, " ");
758	$rule = substr($buffer, 0, $pos);
759	$value = trim(substr($buffer, $pos), $sDefaultTrim . ";");
760	$r[] = array(self::T_AT_RULE, $rule, $value);
761	$buffer = "";
762	array_pop($state);
763	}
764	/**
765	* Selector
766	*/
767	elseif ($c == "," && ($currentState == self::T_AT_MEDIA \|\| $currentState == self::T_DOCUMENT))
768	{
769	$selectors[]= trim($buffer, $sDefaultTrim . ",");
770	$buffer = "";
771	}
772	/*
773	* Start of ruleset
774	*/
775	elseif ($c == "{" && ($currentState == self::T_AT_MEDIA \|\| $currentState == self::T_DOCUMENT))
776	{
777	$selectors[]= trim($buffer, $sDefaultTrim . "{");
778	$selectors = array_filter(array_map("trim", $selectors));
779	$r[] = array(self::T_RULESET_START);
780	$r[] = array(self::T_SELECTORS, $selectors);
781	$r[] = array(self::T_DECLARATIONS_START);
782	$buffer = "";
783	$selectors = array();
784	array_push($state, self::T_DECLARATIONS);
785	}
786	/*
787	* Declaration: Property
788	*/
789	elseif ($c == ":" && $currentState == self::T_DECLARATIONS)
790	{
791	$property = trim($buffer, $sDefaultTrim . ":;");
792	$buffer = "";
793	array_push($state, self::T_DECLARATION);
794	}
795	/*
796	* Declaration: Value
797	*/
798	elseif (($c == ";" \|\| $c == "}" \|\| $c == "\n") && $currentState == self::T_DECLARATION)
799	{
800	$value = trim($buffer, $sDefaultTrim . ";}");
801	$r[] = array(self::T_DECLARATION, $property, $value, $scope);
802	$buffer = "";
803	array_pop($state);
804	if ($c == "}") // declaration closed with a right curly brace => close ruleset
805	{
806	array_pop($state);
807	$r[] = array(self::T_DECLARATIONS_END);
808	$r[] = array(self::T_RULESET_END);
809	}
810	}
811	/*
812	* End of ruleset
813	*/
814	elseif ($c == "}" && $currentState == self::T_DECLARATIONS)
815	{
816	$r[] = array(self::T_DECLARATIONS_END);
817	$r[] = array(self::T_RULESET_END);
818	$buffer = "";
819	array_pop($state);
820	}
821
822	}
823
824	$p = $c;
825	}
826	return $r;
827	}
828	/**
829	* Transforms "opacity: {value}" into browser specific counterparts.
830	*
831	* @param string $property
832	* @param string $value
833	* @return string
834	*/
835	private static function _tOpacity($property, $value)
836	{
837	$ieValue = (int) ((float) $value * 100);
838	$r = "-moz-opacity:" . $value . ";"; // Firefox < 3.5
839	$r .= "-ms-filter: \"alpha(opacity=" . $ieValue . ")\";"; // Internet Explorer 8
840	$r .= "filter: alpha(opacity=" . $ieValue . ");zoom: 1;"; // Internet Explorer 4 - 7
841	return $r;
842	}
843	/**
844	* Transforms "white-space: pre-wrap" into browser specific counterparts.
845	*
846	* @param string $property
847	* @param string $value
848	* @return string
849	*/
850	private static function _tWhiteSpacePreWrap($property, $value)
851	{
852	if (strtolower($value) == "pre-wrap")
853	{
854	$r = "white-space:-moz-pre-wrap;"; // Mozilla
855	$r .= "white-space:-webkit-pre-wrap;"; // Webkit
856	$r .= "white-space:-khtml-pre-wrap;"; // khtml
857	$r .= "white-space:-pre-wrap;"; // Opera 4 - 6
858	$r .= "white-space:-o-pre-wrap;"; // Opera 7+
859	$r .= "word-wrap:break-word;"; // Internet Explorer 5.5+
860	return $r;
861	}
862	else
863	{
864	return "";
865	}
866	}
867	}
868	?>

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