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1<?php
2
3/**
4 * Defines allowed CSS attributes and what their values are.
5 * @see HTMLPurifier_HTMLDefinition
6 */
7class HTMLPurifier_CSSDefinition extends HTMLPurifier_Definition
8{
9
10 public $type = 'CSS';
11
12 /**
13 * Assoc array of attribute name to definition object.
14 * @type HTMLPurifier_AttrDef[]
15 */
16 public $info = array();
17
18 /**
19 * Constructs the info array. The meat of this class.
20 * @param HTMLPurifier_Config $config
21 */
22 protected function doSetup($config)
23 {
24 $this->info['text-align'] = new HTMLPurifier_AttrDef_Enum(
25 array('left', 'right', 'center', 'justify'),
26 false
27 );
28
29 $border_style =
30 $this->info['border-bottom-style'] =
31 $this->info['border-right-style'] =
32 $this->info['border-left-style'] =
33 $this->info['border-top-style'] = new HTMLPurifier_AttrDef_Enum(
34 array(
35 'none',
36 'hidden',
37 'dotted',
38 'dashed',
39 'solid',
40 'double',
41 'groove',
42 'ridge',
43 'inset',
44 'outset'
45 ),
46 false
47 );
48
49 $this->info['border-style'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_style);
50
51 $this->info['clear'] = new HTMLPurifier_AttrDef_Enum(
52 array('none', 'left', 'right', 'both'),
53 false
54 );
55 $this->info['float'] = new HTMLPurifier_AttrDef_Enum(
56 array('none', 'left', 'right'),
57 false
58 );
59 $this->info['font-style'] = new HTMLPurifier_AttrDef_Enum(
60 array('normal', 'italic', 'oblique'),
61 false
62 );
63 $this->info['font-variant'] = new HTMLPurifier_AttrDef_Enum(
64 array('normal', 'small-caps'),
65 false
66 );
67
68 $uri_or_none = new HTMLPurifier_AttrDef_CSS_Composite(
69 array(
70 new HTMLPurifier_AttrDef_Enum(array('none')),
71 new HTMLPurifier_AttrDef_CSS_URI()
72 )
73 );
74
75 $this->info['list-style-position'] = new HTMLPurifier_AttrDef_Enum(
76 array('inside', 'outside'),
77 false
78 );
79 $this->info['list-style-type'] = new HTMLPurifier_AttrDef_Enum(
80 array(
81 'disc',
82 'circle',
83 'square',
84 'decimal',
85 'lower-roman',
86 'upper-roman',
87 'lower-alpha',
88 'upper-alpha',
89 'none'
90 ),
91 false
92 );
93 $this->info['list-style-image'] = $uri_or_none;
94
95 $this->info['list-style'] = new HTMLPurifier_AttrDef_CSS_ListStyle($config);
96
97 $this->info['text-transform'] = new HTMLPurifier_AttrDef_Enum(
98 array('capitalize', 'uppercase', 'lowercase', 'none'),
99 false
100 );
101 $this->info['color'] = new HTMLPurifier_AttrDef_CSS_Color();
102
103 $this->info['background-image'] = $uri_or_none;
104 $this->info['background-repeat'] = new HTMLPurifier_AttrDef_Enum(
105 array('repeat', 'repeat-x', 'repeat-y', 'no-repeat')
106 );
107 $this->info['background-attachment'] = new HTMLPurifier_AttrDef_Enum(
108 array('scroll', 'fixed')
109 );
110 $this->info['background-position'] = new HTMLPurifier_AttrDef_CSS_BackgroundPosition();
111
112 $border_color =
113 $this->info['border-top-color'] =
114 $this->info['border-bottom-color'] =
115 $this->info['border-left-color'] =
116 $this->info['border-right-color'] =
117 $this->info['background-color'] = new HTMLPurifier_AttrDef_CSS_Composite(
118 array(
119 new HTMLPurifier_AttrDef_Enum(array('transparent')),
120 new HTMLPurifier_AttrDef_CSS_Color()
121 )
122 );
123
124 $this->info['background'] = new HTMLPurifier_AttrDef_CSS_Background($config);
125
126 $this->info['border-color'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_color);
127
128 $border_width =
129 $this->info['border-top-width'] =
130 $this->info['border-bottom-width'] =
131 $this->info['border-left-width'] =
132 $this->info['border-right-width'] = new HTMLPurifier_AttrDef_CSS_Composite(
133 array(
134 new HTMLPurifier_AttrDef_Enum(array('thin', 'medium', 'thick')),
135 new HTMLPurifier_AttrDef_CSS_Length('0') //disallow negative
136 )
137 );
138
139 $this->info['border-width'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_width);
140
141 $this->info['letter-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(
142 array(
143 new HTMLPurifier_AttrDef_Enum(array('normal')),
144 new HTMLPurifier_AttrDef_CSS_Length()
145 )
146 );
147
148 $this->info['word-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(
149 array(
150 new HTMLPurifier_AttrDef_Enum(array('normal')),
151 new HTMLPurifier_AttrDef_CSS_Length()
152 )
153 );
154
155 $this->info['font-size'] = new HTMLPurifier_AttrDef_CSS_Composite(
156 array(
157 new HTMLPurifier_AttrDef_Enum(
158 array(
159 'xx-small',
160 'x-small',
161 'small',
162 'medium',
163 'large',
164 'x-large',
165 'xx-large',
166 'larger',
167 'smaller'
168 )
169 ),
170 new HTMLPurifier_AttrDef_CSS_Percentage(),
171 new HTMLPurifier_AttrDef_CSS_Length()
172 )
173 );
174
175 $this->info['line-height'] = new HTMLPurifier_AttrDef_CSS_Composite(
176 array(
177 new HTMLPurifier_AttrDef_Enum(array('normal')),
178 new HTMLPurifier_AttrDef_CSS_Number(true), // no negatives
179 new HTMLPurifier_AttrDef_CSS_Length('0'),
180 new HTMLPurifier_AttrDef_CSS_Percentage(true)
181 )
182 );
183
184 $margin =
185 $this->info['margin-top'] =
186 $this->info['margin-bottom'] =
187 $this->info['margin-left'] =
188 $this->info['margin-right'] = new HTMLPurifier_AttrDef_CSS_Composite(
189 array(
190 new HTMLPurifier_AttrDef_CSS_Length(),
191 new HTMLPurifier_AttrDef_CSS_Percentage(),
192 new HTMLPurifier_AttrDef_Enum(array('auto'))
193 )
194 );
195
196 $this->info['margin'] = new HTMLPurifier_AttrDef_CSS_Multiple($margin);
197
198 // non-negative
199 $padding =
200 $this->info['padding-top'] =
201 $this->info['padding-bottom'] =
202 $this->info['padding-left'] =
203 $this->info['padding-right'] = new HTMLPurifier_AttrDef_CSS_Composite(
204 array(
205 new HTMLPurifier_AttrDef_CSS_Length('0'),
206 new HTMLPurifier_AttrDef_CSS_Percentage(true)
207 )
208 );
209
210 $this->info['padding'] = new HTMLPurifier_AttrDef_CSS_Multiple($padding);
211
212 $this->info['text-indent'] = new HTMLPurifier_AttrDef_CSS_Composite(
213 array(
214 new HTMLPurifier_AttrDef_CSS_Length(),
215 new HTMLPurifier_AttrDef_CSS_Percentage()
216 )
217 );
218
219 $trusted_wh = new HTMLPurifier_AttrDef_CSS_Composite(
220 array(
221 new HTMLPurifier_AttrDef_CSS_Length('0'),
222 new HTMLPurifier_AttrDef_CSS_Percentage(true),
223 new HTMLPurifier_AttrDef_Enum(array('auto'))
224 )
225 );
226 $max = $config->get('CSS.MaxImgLength');
227
228 $this->info['width'] =
229 $this->info['height'] =
230 $max === null ?
231 $trusted_wh :
232 new HTMLPurifier_AttrDef_Switch(
233 'img',
234 // For img tags:
235 new HTMLPurifier_AttrDef_CSS_Composite(
236 array(
237 new HTMLPurifier_AttrDef_CSS_Length('0', $max),
238 new HTMLPurifier_AttrDef_Enum(array('auto'))
239 )
240 ),
241 // For everyone else:
242 $trusted_wh
243 );
244
245 $this->info['text-decoration'] = new HTMLPurifier_AttrDef_CSS_TextDecoration();
246
247 $this->info['font-family'] = new HTMLPurifier_AttrDef_CSS_FontFamily();
248
249 // this could use specialized code
250 $this->info['font-weight'] = new HTMLPurifier_AttrDef_Enum(
251 array(
252 'normal',
253 'bold',
254 'bolder',
255 'lighter',
256 '100',
257 '200',
258 '300',
259 '400',
260 '500',
261 '600',
262 '700',
263 '800',
264 '900'
265 ),
266 false
267 );
268
269 // MUST be called after other font properties, as it references
270 // a CSSDefinition object
271 $this->info['font'] = new HTMLPurifier_AttrDef_CSS_Font($config);
272
273 // same here
274 $this->info['border'] =
275 $this->info['border-bottom'] =
276 $this->info['border-top'] =
277 $this->info['border-left'] =
278 $this->info['border-right'] = new HTMLPurifier_AttrDef_CSS_Border($config);
279
280 $this->info['border-collapse'] = new HTMLPurifier_AttrDef_Enum(
281 array('collapse', 'separate')
282 );
283
284 $this->info['caption-side'] = new HTMLPurifier_AttrDef_Enum(
285 array('top', 'bottom')
286 );
287
288 $this->info['table-layout'] = new HTMLPurifier_AttrDef_Enum(
289 array('auto', 'fixed')
290 );
291
292 $this->info['vertical-align'] = new HTMLPurifier_AttrDef_CSS_Composite(
293 array(
294 new HTMLPurifier_AttrDef_Enum(
295 array(
296 'baseline',
297 'sub',
298 'super',
299 'top',
300 'text-top',
301 'middle',
302 'bottom',
303 'text-bottom'
304 )
305 ),
306 new HTMLPurifier_AttrDef_CSS_Length(),
307 new HTMLPurifier_AttrDef_CSS_Percentage()
308 )
309 );
310
311 $this->info['border-spacing'] = new HTMLPurifier_AttrDef_CSS_Multiple(new HTMLPurifier_AttrDef_CSS_Length(), 2);
312
313 // These CSS properties don't work on many browsers, but we live
314 // in THE FUTURE!
315 $this->info['white-space'] = new HTMLPurifier_AttrDef_Enum(
316 array('nowrap', 'normal', 'pre', 'pre-wrap', 'pre-line')
317 );
318
319 if ($config->get('CSS.Proprietary')) {
320 $this->doSetupProprietary($config);
321 }
322
323 if ($config->get('CSS.AllowTricky')) {
324 $this->doSetupTricky($config);
325 }
326
327 if ($config->get('CSS.Trusted')) {
328 $this->doSetupTrusted($config);
329 }
330
331 $allow_important = $config->get('CSS.AllowImportant');
332 // wrap all attr-defs with decorator that handles !important
333 foreach ($this->info as $k => $v) {
334 $this->info[$k] = new HTMLPurifier_AttrDef_CSS_ImportantDecorator($v, $allow_important);
335 }
336
337 $this->setupConfigStuff($config);
338 }
339
340 /**
341 * @param HTMLPurifier_Config $config
342 */
343 protected function doSetupProprietary($config)
344 {
345 // Internet Explorer only scrollbar colors
346 $this->info['scrollbar-arrow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
347 $this->info['scrollbar-base-color'] = new HTMLPurifier_AttrDef_CSS_Color();
348 $this->info['scrollbar-darkshadow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
349 $this->info['scrollbar-face-color'] = new HTMLPurifier_AttrDef_CSS_Color();
350 $this->info['scrollbar-highlight-color'] = new HTMLPurifier_AttrDef_CSS_Color();
351 $this->info['scrollbar-shadow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
352
353 // technically not proprietary, but CSS3, and no one supports it
354 $this->info['opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
355 $this->info['-moz-opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
356 $this->info['-khtml-opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
357
358 // only opacity, for now
359 $this->info['filter'] = new HTMLPurifier_AttrDef_CSS_Filter();
360
361 // more CSS3
362 $this->info['page-break-after'] =
363 $this->info['page-break-before'] = new HTMLPurifier_AttrDef_Enum(
364 array(
365 'auto',
366 'always',
367 'avoid',
368 'left',
369 'right'
370 )
371 );
372 $this->info['page-break-inside'] = new HTMLPurifier_AttrDef_Enum(array('auto', 'avoid'));
373
374 }
375
376 /**
377 * @param HTMLPurifier_Config $config
378 */
379 protected function doSetupTricky($config)
380 {
381 $this->info['display'] = new HTMLPurifier_AttrDef_Enum(
382 array(
383 'inline',
384 'block',
385 'list-item',
386 'run-in',
387 'compact',
388 'marker',
389 'table',
390 'inline-block',
391 'inline-table',
392 'table-row-group',
393 'table-header-group',
394 'table-footer-group',
395 'table-row',
396 'table-column-group',
397 'table-column',
398 'table-cell',
399 'table-caption',
400 'none'
401 )
402 );
403 $this->info['visibility'] = new HTMLPurifier_AttrDef_Enum(
404 array('visible', 'hidden', 'collapse')
405 );
406 $this->info['overflow'] = new HTMLPurifier_AttrDef_Enum(array('visible', 'hidden', 'auto', 'scroll'));
407 }
408
409 /**
410 * @param HTMLPurifier_Config $config
411 */
412 protected function doSetupTrusted($config)
413 {
414 $this->info['position'] = new HTMLPurifier_AttrDef_Enum(
415 array('static', 'relative', 'absolute', 'fixed')
416 );
417 $this->info['top'] =
418 $this->info['left'] =
419 $this->info['right'] =
420 $this->info['bottom'] = new HTMLPurifier_AttrDef_CSS_Composite(
421 array(
422 new HTMLPurifier_AttrDef_CSS_Length(),
423 new HTMLPurifier_AttrDef_CSS_Percentage(),
424 new HTMLPurifier_AttrDef_Enum(array('auto')),
425 )
426 );
427 $this->info['z-index'] = new HTMLPurifier_AttrDef_CSS_Composite(
428 array(
429 new HTMLPurifier_AttrDef_Integer(),
430 new HTMLPurifier_AttrDef_Enum(array('auto')),
431 )
432 );
433 }
434
435 /**
436 * Performs extra config-based processing. Based off of
437 * HTMLPurifier_HTMLDefinition.
438 * @param HTMLPurifier_Config $config
439 * @todo Refactor duplicate elements into common class (probably using
440 * composition, not inheritance).
441 */
442 protected function setupConfigStuff($config)
443 {
444 // setup allowed elements
445 $support = "(for information on implementing this, see the " .
446 "support forums) ";
447 $allowed_properties = $config->get('CSS.AllowedProperties');
448 if ($allowed_properties !== null) {
449 foreach ($this->info as $name => $d) {
450 if (!isset($allowed_properties[$name])) {
451 unset($this->info[$name]);
452 }
453 unset($allowed_properties[$name]);
454 }
455 // emit errors
456 foreach ($allowed_properties as $name => $d) {
457 // :TODO: Is this htmlspecialchars() call really necessary?
458 $name = htmlspecialchars($name);
459 trigger_error("Style attribute '$name' is not supported $support", E_USER_WARNING);
460 }
461 }
462
463 $forbidden_properties = $config->get('CSS.ForbiddenProperties');
464 if ($forbidden_properties !== null) {
465 foreach ($this->info as $name => $d) {
466 if (isset($forbidden_properties[$name])) {
467 unset($this->info[$name]);
468 }
469 }
470 }
471 }
472}
473
474// vim: et sw=4 sts=4
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 14:11:12 +0000