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Ticket #30644: wpautop_replacement.php

File wpautop_replacement.php, 11.0 KB (added by azaozz, 11 years ago)

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1	<?php
2	/*
3	Plugin Name: WP Autop
4	Plugin URI: http://wordpress.org/plugins/
5	Description: Feature plugin to improve the wpautop() functionality.
6	Version: 0.1
7
8	Released under the GPL v.2, http://www.gnu.org/licenses/gpl-2.0.html
9
10	This program is distributed in the hope that it will be useful,
11	but WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	GNU General Public License for more details.
14	*/
15
16	class WP_Autop {
17	/**
18	* Most elements that are used in the body of documents
19	* and applications are categorized as flow content.
20	*
21	* @see http://www.w3.org/TR/html5/dom.html#flow-content
22	*/
23	protected static $flowContent = array(
24	'a', 'abbr', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi',
25	'bdo', 'blockquote', 'br', 'button', 'canvas', 'cite', 'code', 'data',
26	'datalist', 'del', 'dfn', 'div', 'dl', 'em', 'embed', 'fieldset', 'figure',
27	'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'hr', 'i',
28	'iframe', 'img', 'input', 'ins', 'kbd', 'keygen', 'label', 'main', 'map',
29	'mark', 'math', 'meter', 'nav', 'noscript', 'object', 'ol', 'output', 'p',
30	'pre', 'progress', 'q', 'ruby', 's', 'samp', 'script', 'section', 'select',
31	'small', 'span', 'strong', 'sub', 'sup', 'svg', 'table', 'template',
32	'textarea', 'time', 'u', 'ul', 'var', 'video',
33	);
34
35	/**
36	* Phrasing content is the text of the document,
37	* as well as elements that mark up that text at the intra-paragraph level.
38	*
39	* @see http://www.w3.org/TR/html5/dom.html#phrasing-content
40	*/
41	protected static $phrasingContent = array(
42	'a', 'abbr', 'area', 'audio', 'b', 'bdi', 'bdo', 'br', 'button', 'canvas',
43	'cite', 'code', 'data', 'datalist', 'del', 'dfn', 'em', 'embed', 'i',
44	'iframe', 'img', 'input', 'ins', 'kbd', 'keygen', 'label', 'map', 'mark',
45	'math', 'meter', 'noscript', 'object', 'output', 'progress', 'q', 'ruby',
46	's', 'samp', 'script', 'select', 'small', 'span', 'strong', 'sub', 'sup',
47	'svg', 'template', 'textarea', 'time', 'u', 'var', 'video', 'wbr',
48	);
49
50	/**
51	* Grouping of elements where flow content is expected.
52	*
53	* @see http://www.w3.org/TR/html5/grouping-content.html
54	* @see http://www.w3.org/TR/html5/tabular-data.html
55	*/
56	protected static $groupingContent = array(
57	// Grouping content
58	'ol', 'ul', 'dl',
59	// Tabular data
60	'table', 'tbody', 'thead', 'tfoot', 'tr',
61	);
62
63	/**
64	* Where flow content is expected.
65	*
66	* @see http://www.w3.org/TR/html5/grouping-content.html#the-p-element
67	*/
68	protected static $flowContainer = array(
69	// Flow content
70	/'a',/ 'address', 'article', 'aside', 'audio', 'blockquote', 'canvas', 'del',
71	'div', 'fieldset', 'figure', 'footer', 'form', 'header', 'iframe', 'ins',
72	'main', 'map', 'nav', 'noscript', 'object', 'section', 'video',
73	// Grouping content
74	'li', 'dt', 'dd', 'figcaption',
75	// Tabular data
76	'td', 'th', 'caption'
77	);
78
79	protected static $forceParagraph = array(
80	'blockquote',
81	);
82
83	protected function isFlowContent( $el ) {
84	return isset( $el['tag'] ) && in_array( $el['tag'], self::$flowContent );
85	}
86
87	protected function isPhrasingContent( $el ) {
88	return isset( $el['tag'] ) && in_array( $el['tag'], self::$phrasingContent );
89	}
90
91	protected function isGroupingContent( $el ) {
92	return isset( $el['tag'] ) && in_array( $el['tag'], self::$groupingContent );
93	}
94
95	protected function isFlowContainer( $el ) {
96	return isset( $el['tag'] ) && in_array( $el['tag'], self::$flowContainer );
97	}
98
99	protected function isForceParagraph( $el ) {
100	return isset( $el['tag'] ) && in_array( $el['tag'], self::$forceParagraph );
101	}
102
103	/**
104	* autop
105	*/
106	public function autop( $text, $br = true ) {
107	return $this->treeToString( $this->parse( $text ), $br );
108	}
109
110	/**
111	* parse
112	*/
113	public function parse( $text ) {
114	$root = array(
115	'type' => 'root', 'children' => array(),
116	);
117
118	$stack = array(
119	array( preg_replace( '%\R%u', "\n", $text ), &$root ),
120	);
121
122	/** -----------------------------
123	* While stack
124	*/
125
126	while ( $_s = array_pop( $stack ) ) {
127
128	if ( strpos( $_s[0], '<' ) !== false ) {
129	preg_match_all( self::getRegex(), $_s[0], $_m, PREG_SET_ORDER );
130	} else {
131	$_m = array( array( 'text' => $_s[0] ) );
132	}
133
134	$el = &$_s[1];
135	$c = -1;
136
137	/** -----------------------------
138	* For each element ( text, tags, comments )
139	*/
140
141	for ( $i = 0, $ilen = count( $_m ); $i < $ilen; $i++ ) {
142	$m = $_m[$i];
143
144	/** ---------------------------
145	* Text
146	*/
147
148	$m['text'] = isset( $m['text'] ) ? $m['text'] : null;
149
150	if ( $m['text'] !== null && $m['text'] !== '' ) {
151
152	preg_match( '%^(?<a>[[:space:]]).?(?<b>[[:space:]]*)$%su', $m['text'], $s );
153
154	$spacePattern = '%([[:space:]](\R)[[:space:]]){2,}%u';
155
156	if ( $i !== 0 && $i !== $ilen - 1 && ! preg_match( $spacePattern, $s['a'] ) ) {
157	$el['children'][++$c] = array(
158	'type' => 'space',
159	'space' => $s['a'],
160	);
161	}
162
163	$m['text'] = trim( $m['text'] );
164
165	if ( $m['text'] !== '' ) {
166	$_p = preg_split( $spacePattern, $m['text'] );
167
168	foreach ( $_p as $p ) {
169	$el['children'][++$c] = array(
170	'type' => 'text',
171	'text' => $p,
172	);
173	}
174
175	if ( $i !== $ilen - 1 && ! preg_match( $spacePattern, $s['b'] ) ) {
176	$el['children'][++$c] = array(
177	'type' => 'space',
178	'space' => $s['b'],
179	);
180	}
181	}
182	continue;
183	} // Text
184
185	/** ---------------------------
186	* Tag
187	*/
188
189	$m['raw'] = isset( $m['raw'] ) ? $m['raw'] : null;
190	$m['tag'] = isset( $m['tag'] ) ? $m['tag'] : null;
191	$m['attrs'] = isset( $m['attrs'] ) ? $m['attrs'] : null;
192	$m['inner'] = isset( $m['inner'] ) ? $m['inner'] : null;
193
194	if ( $m['tag'] !== null && $m['tag'] !== '' ) {
195
196	$m['tag'] = strtolower( $m['tag'] );
197
198	if ( $this->isFlowContainer( $m ) ) {
199
200	$el['children'][++$c] = array(
201	'type' => 'container',
202	'tag' => $m['tag'],
203	'attrs' => $m['attrs'],
204	'children' => array(),
205	);
206
207	if ( $m['inner'] !== null && $m['inner'] !== '' ) {
208	array_push( $stack, array( $m['inner'], &$el['children'][$c] ) );
209	}
210
211	} elseif ( $this->isGroupingContent( $m ) ) {
212
213	$el['children'][++$c] = array(
214	'type' => 'grouping',
215	'tag' => $m['tag'],
216	'attrs' => $m['attrs'],
217	'children' => array(),
218	);
219
220	if ( $m['inner'] !== null && $m['inner'] !== '' ) {
221	array_push( $stack, array( $m['inner'], &$el['children'][$c] ) );
222	}
223
224	} elseif ( $this->isPhrasingContent( $m ) ) {
225
226	$el['children'][++$c] = array(
227	'type' => 'phrasing',
228	'raw' => $m['raw'],
229	);
230
231	} else {
232
233	$el['children'][++$c] = array(
234	'type' => 'flow',
235	'raw' => $m['raw'],
236	);
237	}
238	continue;
239	} // Tag
240
241	/** ---------------------------
242	* Comment
243	*/
244
245	$m['comment'] = isset( $m['comment'] ) ? $m['comment'] : null;
246
247	if ( $m['comment'] !== null && $m['comment'] !== '' ) {
248
249	$el['children'][++$c] = array(
250	'type' => 'comment',
251	'raw' => $m['raw'],
252	);
253	continue;
254	} // Comment
255
256	} // For each element
257	} // While stack
258
259	return $root;
260	}
261
262	/**
263	* treeToString
264	*/
265	protected function treeToString( $root, $br = true ) {
266	$stack = array( array( &$root, 0 ) );
267	$root['out'] = '';
268
269	/** -----------------------------
270	* While stack
271	*/
272
273	while ( $_s = array_pop( $stack ) ) {
274	$parent = &$_s[0];
275	$c = $_s[1];
276	$out = &$parent['out'];
277
278	/** -----------------------------
279	* For each element ( text, tags, comments )
280	*/
281
282	for ( $i = $c, $len = count( $parent['children'] ); $i < $len; $i++ ) {
283	$el = &$parent['children'][$i];
284
285	/** ---------------------------
286	* Text, Phrasing
287	*/
288
289	if ( $el['type'] === 'text' \|\| $el['type'] === 'phrasing' ) {
290	$type = $el['type'];
291
292	if ( $type === 'text' ) {
293	$content = str_replace( "\n", "<br>\n", $el['text'] );
294	} else {
295	$content = $el['raw'];
296	}
297
298	$j = $i;
299	while ( isset( $parent['children'][$i + 2] ) ) {
300	$a = $parent['children'][$i + 1];
301	$b = $parent['children'][$i + 2];
302
303	if ( $a['type'] === 'space' ) {
304	if ( $b['type'] === 'text' ) {
305	if ( $type !== 'text' ) {
306	$type = $b['type'];
307	$tmp = $a['space'] . $b['text'];
308	$content .= str_replace( "\n", "<br>\n", $tmp );
309	$i += 2;
310	} else {
311	break;
312	}
313	} elseif ( $b['type'] === 'phrasing' ) {
314	$type = $b['type'];
315	$tmp = $a['space'] . $b['raw'];
316	$content .= str_replace( "\n", "<br>\n", $tmp );
317	$i += 2;
318	} elseif ( $b['type'] === 'comment' ) {
319	$type = $b['type'];
320	$content .= $a['space'] . $b['raw'];
321	$i += 2;
322	} else {
323	break;
324	}
325	} else {
326	break;
327	}
328	}
329
330	$content = str_replace( "\n", "\n ", "\n" . $content );
331
332	if ( $parent['type'] === 'grouping' ) {
333	$out .= "\n" . $content . "\n";
334	} else {
335	if ( $len === 1 && ! $this->isForceParagraph( $parent ) ) {
336	$out .= "\n" . $content . "\n";
337	} else {
338	$out .= "\n<p>" . $content . "\n</p>\n";
339	}
340	}
341	} // Text, Phrasing
342
343	/** ---------------------------
344	* Container, Grouping
345	*/
346
347	if ( $el['type'] === 'container' \|\| $el['type'] === 'grouping' ) {
348	if ( isset( $el['revisit'] ) && $el['revisit'] ) {
349	$el['attrs'] = $el['attrs'] !== '' ? ' ' . $el['attrs'] : '';
350	$out .= "\n" . '<' . $el['tag'] . $el['attrs'] . '>';
351	$out .= str_replace( "\n", "\n ", "\n". trim( $el['out'] ) );
352	$out .= "\n" . '</' . $el['tag'] . '>' . "\n";
353	} else {
354	$stack[] = array( &$parent, $i );
355	$stack[] = array( &$el, 0 );
356	$el['revisit'] = true;
357	$el['out'] = '';
358	break;
359	}
360	continue;
361	} // Container, Grouping
362
363	/** ---------------------------
364	* Flow
365	*/
366
367	if ( $el['type'] === 'flow' ) {
368	$out .= "\n" . $el['raw'] . "\n";
369	continue;
370	} // Flow
371
372	/** ---------------------------
373	* Comment
374	*/
375
376	if ( $el['type'] === 'comment' ) {
377	$out .= "\n" . $el['raw'] . "\n";
378	continue;
379	} // Comment
380
381	} // For each element
382	} // While stack
383
384	return trim( $out );
385	}
386
387	/**
388	* getRegex
389	*/
390	protected static function getRegex() {
391	return '%'
392	. '(?<raw>'
393	. '(?<text>'
394	. '[^<]+'
395	. ')'
396	. '\|'
397	. '<!--(?<comment>.*?)-->'
398	. '\|'
399	. '<(?<tag>'
400	. '[^[:space:]>]+'
401	. ')'
402	. '(?:'
403	. '[[:space:]]+'
404	. '(?<attrs>'
405	. '(?:'
406	. '"(?:\\\"\|[^"])*"'
407	. '\|'
408	. "'(?:\\\'\|[^'])*'"
409	. '\|'
410	. '(?:[^/>"\']\|/(?!>))'
411	. ')*'
412	. ')'
413	. ')?'
414	. '[[:space:]]*'
415	. '(?:'
416	. '/>'
417	. '\|'
418	. '>'
419	. '(?:'
420	. '(?<inner>'
421	. '(?R)*?'
422	. ')'
423	. '</\k<tag>>'
424	. ')?'
425	. ')'
426	. ')'
427	. '%isuS';
428	}
429	}
430
431	/**
432	* Replaces double line-breaks with paragraph elements.
433	*/
434	function wpautop_replacement( $output, $text, $br = true ) {
435	static $autop;
436
437	if ( ! $autop ) {
438	$autop = new WP_Autop();
439	}
440
441	return $autop->autop( $text, $br );
442	}
443
444	add_filter( '_temp_wpautop', 'wpautop_replacement', 10, 2 );
445

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