forked from mozilla/gecko-dev
-
Notifications
You must be signed in to change notification settings - Fork 2
/
nsMediaFeatures.cpp
658 lines (613 loc) · 19.3 KB
/
nsMediaFeatures.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
/* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* the features that media queries can test */
#include "nsMediaFeatures.h"
#include "nsGkAtoms.h"
#include "nsCSSKeywords.h"
#include "nsStyleConsts.h"
#include "nsPresContext.h"
#include "nsCSSValue.h"
#include "mozilla/LookAndFeel.h"
#include "nsCSSRuleProcessor.h"
using namespace mozilla;
static const int32_t kOrientationKeywords[] = {
eCSSKeyword_portrait, NS_STYLE_ORIENTATION_PORTRAIT,
eCSSKeyword_landscape, NS_STYLE_ORIENTATION_LANDSCAPE,
eCSSKeyword_UNKNOWN, -1
};
static const int32_t kScanKeywords[] = {
eCSSKeyword_progressive, NS_STYLE_SCAN_PROGRESSIVE,
eCSSKeyword_interlace, NS_STYLE_SCAN_INTERLACE,
eCSSKeyword_UNKNOWN, -1
};
#ifdef XP_WIN
struct WindowsThemeName {
LookAndFeel::WindowsTheme id;
const wchar_t* name;
};
// Windows theme identities used in the -moz-windows-theme media query.
const WindowsThemeName themeStrings[] = {
{ LookAndFeel::eWindowsTheme_Aero, L"aero" },
{ LookAndFeel::eWindowsTheme_AeroLite, L"aero-lite" },
{ LookAndFeel::eWindowsTheme_LunaBlue, L"luna-blue" },
{ LookAndFeel::eWindowsTheme_LunaOlive, L"luna-olive" },
{ LookAndFeel::eWindowsTheme_LunaSilver, L"luna-silver" },
{ LookAndFeel::eWindowsTheme_Royale, L"royale" },
{ LookAndFeel::eWindowsTheme_Zune, L"zune" },
{ LookAndFeel::eWindowsTheme_Generic, L"generic" }
};
struct OperatingSystemVersionInfo {
LookAndFeel::OperatingSystemVersion id;
const wchar_t* name;
};
// Os version identities used in the -moz-os-version media query.
const OperatingSystemVersionInfo osVersionStrings[] = {
{ LookAndFeel::eOperatingSystemVersion_WindowsXP, L"windows-xp" },
{ LookAndFeel::eOperatingSystemVersion_WindowsVista, L"windows-vista" },
{ LookAndFeel::eOperatingSystemVersion_Windows7, L"windows-win7" },
{ LookAndFeel::eOperatingSystemVersion_Windows8, L"windows-win8" },
};
#endif
// A helper for four features below
static nsSize
GetSize(nsPresContext* aPresContext)
{
nsSize size;
if (aPresContext->IsRootPaginatedDocument())
// We want the page size, including unprintable areas and margins.
size = aPresContext->GetPageSize();
else
size = aPresContext->GetVisibleArea().Size();
return size;
}
static nsresult
GetWidth(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
nsSize size = GetSize(aPresContext);
float pixelWidth = aPresContext->AppUnitsToFloatCSSPixels(size.width);
aResult.SetFloatValue(pixelWidth, eCSSUnit_Pixel);
return NS_OK;
}
static nsresult
GetHeight(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
nsSize size = GetSize(aPresContext);
float pixelHeight = aPresContext->AppUnitsToFloatCSSPixels(size.height);
aResult.SetFloatValue(pixelHeight, eCSSUnit_Pixel);
return NS_OK;
}
inline static nsDeviceContext*
GetDeviceContextFor(nsPresContext* aPresContext)
{
// It would be nice to call
// nsLayoutUtils::GetDeviceContextForScreenInfo here, except for two
// things: (1) it can flush, and flushing is bad here, and (2) it
// doesn't really get us consistency in multi-monitor situations
// *anyway*.
return aPresContext->DeviceContext();
}
// A helper for three features below.
static nsSize
GetDeviceSize(nsPresContext* aPresContext)
{
nsSize size;
if (aPresContext->IsRootPaginatedDocument())
// We want the page size, including unprintable areas and margins.
// XXX The spec actually says we want the "page sheet size", but
// how is that different?
size = aPresContext->GetPageSize();
else
GetDeviceContextFor(aPresContext)->
GetDeviceSurfaceDimensions(size.width, size.height);
return size;
}
static nsresult
GetDeviceWidth(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
nsSize size = GetDeviceSize(aPresContext);
float pixelWidth = aPresContext->AppUnitsToFloatCSSPixels(size.width);
aResult.SetFloatValue(pixelWidth, eCSSUnit_Pixel);
return NS_OK;
}
static nsresult
GetDeviceHeight(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
nsSize size = GetDeviceSize(aPresContext);
float pixelHeight = aPresContext->AppUnitsToFloatCSSPixels(size.height);
aResult.SetFloatValue(pixelHeight, eCSSUnit_Pixel);
return NS_OK;
}
static nsresult
GetOrientation(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
nsSize size = GetSize(aPresContext);
int32_t orientation;
if (size.width > size.height) {
orientation = NS_STYLE_ORIENTATION_LANDSCAPE;
} else {
// Per spec, square viewports should be 'portrait'
orientation = NS_STYLE_ORIENTATION_PORTRAIT;
}
aResult.SetIntValue(orientation, eCSSUnit_Enumerated);
return NS_OK;
}
static nsresult
GetDeviceOrientation(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
nsSize size = GetDeviceSize(aPresContext);
int32_t orientation;
if (size.width > size.height) {
orientation = NS_STYLE_ORIENTATION_LANDSCAPE;
} else {
// Per spec, square viewports should be 'portrait'
orientation = NS_STYLE_ORIENTATION_PORTRAIT;
}
aResult.SetIntValue(orientation, eCSSUnit_Enumerated);
return NS_OK;
}
static nsresult
GetIsResourceDocument(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
nsIDocument* doc = aPresContext->Document();
aResult.SetIntValue(doc && doc->IsResourceDoc() ? 1 : 0, eCSSUnit_Integer);
return NS_OK;
}
// Helper for two features below
static nsresult
MakeArray(const nsSize& aSize, nsCSSValue& aResult)
{
nsRefPtr<nsCSSValue::Array> a = nsCSSValue::Array::Create(2);
a->Item(0).SetIntValue(aSize.width, eCSSUnit_Integer);
a->Item(1).SetIntValue(aSize.height, eCSSUnit_Integer);
aResult.SetArrayValue(a, eCSSUnit_Array);
return NS_OK;
}
static nsresult
GetAspectRatio(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
return MakeArray(GetSize(aPresContext), aResult);
}
static nsresult
GetDeviceAspectRatio(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
return MakeArray(GetDeviceSize(aPresContext), aResult);
}
static nsresult
GetColor(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
// FIXME: This implementation is bogus. nsDeviceContext
// doesn't provide reliable information (should be fixed in bug
// 424386).
// FIXME: On a monochrome device, return 0!
nsDeviceContext *dx = GetDeviceContextFor(aPresContext);
uint32_t depth;
dx->GetDepth(depth);
// The spec says to use bits *per color component*, so divide by 3,
// and round down, since the spec says to use the smallest when the
// color components differ.
depth /= 3;
aResult.SetIntValue(int32_t(depth), eCSSUnit_Integer);
return NS_OK;
}
static nsresult
GetColorIndex(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
// We should return zero if the device does not use a color lookup
// table. Stuart says that our handling of displays with 8-bit
// color is bad enough that we never change the lookup table to
// match what we're trying to display, so perhaps we should always
// return zero. Given that there isn't any better information
// exposed, we don't have much other choice.
aResult.SetIntValue(0, eCSSUnit_Integer);
return NS_OK;
}
static nsresult
GetMonochrome(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
// For color devices we should return 0.
// FIXME: On a monochrome device, return the actual color depth, not
// 0!
aResult.SetIntValue(0, eCSSUnit_Integer);
return NS_OK;
}
static nsresult
GetResolution(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
// Resolution measures device pixels per CSS (inch/cm/pixel). We
// return it in device pixels per CSS inches.
float dpi = float(nsPresContext::AppUnitsPerCSSInch()) /
float(aPresContext->AppUnitsPerDevPixel());
aResult.SetFloatValue(dpi, eCSSUnit_Inch);
return NS_OK;
}
static nsresult
GetScan(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
// Since Gecko doesn't support the 'tv' media type, the 'scan'
// feature is never present.
aResult.Reset();
return NS_OK;
}
static nsresult
GetGrid(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
// Gecko doesn't support grid devices (e.g., ttys), so the 'grid'
// feature is always 0.
aResult.SetIntValue(0, eCSSUnit_Integer);
return NS_OK;
}
static nsresult
GetDevicePixelRatio(nsPresContext* aPresContext, const nsMediaFeature*,
nsCSSValue& aResult)
{
float ratio = aPresContext->CSSPixelsToDevPixels(1.0f);
aResult.SetFloatValue(ratio, eCSSUnit_Number);
return NS_OK;
}
static nsresult
GetSystemMetric(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
nsCSSValue& aResult)
{
NS_ABORT_IF_FALSE(aFeature->mValueType == nsMediaFeature::eBoolInteger,
"unexpected type");
nsIAtom *metricAtom = *aFeature->mData.mMetric;
bool hasMetric = nsCSSRuleProcessor::HasSystemMetric(metricAtom);
aResult.SetIntValue(hasMetric ? 1 : 0, eCSSUnit_Integer);
return NS_OK;
}
static nsresult
GetWindowsTheme(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
nsCSSValue& aResult)
{
aResult.Reset();
#ifdef XP_WIN
uint8_t windowsThemeId =
nsCSSRuleProcessor::GetWindowsThemeIdentifier();
// Classic mode should fail to match.
if (windowsThemeId == LookAndFeel::eWindowsTheme_Classic)
return NS_OK;
// Look up the appropriate theme string
for (size_t i = 0; i < ArrayLength(themeStrings); ++i) {
if (windowsThemeId == themeStrings[i].id) {
aResult.SetStringValue(nsDependentString(themeStrings[i].name),
eCSSUnit_Ident);
break;
}
}
#endif
return NS_OK;
}
static nsresult
GetOperatinSystemVersion(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
nsCSSValue& aResult)
{
aResult.Reset();
#ifdef XP_WIN
int32_t metricResult;
if (NS_SUCCEEDED(
LookAndFeel::GetInt(LookAndFeel::eIntID_OperatingSystemVersionIdentifier,
&metricResult))) {
for (size_t i = 0; i < ArrayLength(osVersionStrings); ++i) {
if (metricResult == osVersionStrings[i].id) {
aResult.SetStringValue(nsDependentString(osVersionStrings[i].name),
eCSSUnit_Ident);
break;
}
}
}
#endif
return NS_OK;
}
static nsresult
GetIsGlyph(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
nsCSSValue& aResult)
{
aResult.SetIntValue(aPresContext->IsGlyph() ? 1 : 0, eCSSUnit_Integer);
return NS_OK;
}
/*
* Adding new media features requires (1) adding the new feature to this
* array, with appropriate entries (and potentially any new code needed
* to support new types in these entries and (2) ensuring that either
* nsPresContext::MediaFeatureValuesChanged or
* nsPresContext::PostMediaFeatureValuesChangedEvent is called when the
* value that would be returned by the entry's mGetter changes.
*/
/* static */ const nsMediaFeature
nsMediaFeatures::features[] = {
{
&nsGkAtoms::width,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eLength,
{ nullptr },
GetWidth
},
{
&nsGkAtoms::height,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eLength,
{ nullptr },
GetHeight
},
{
&nsGkAtoms::deviceWidth,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eLength,
{ nullptr },
GetDeviceWidth
},
{
&nsGkAtoms::deviceHeight,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eLength,
{ nullptr },
GetDeviceHeight
},
{
&nsGkAtoms::orientation,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eEnumerated,
{ kOrientationKeywords },
GetOrientation
},
{
&nsGkAtoms::aspectRatio,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eIntRatio,
{ nullptr },
GetAspectRatio
},
{
&nsGkAtoms::deviceAspectRatio,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eIntRatio,
{ nullptr },
GetDeviceAspectRatio
},
{
&nsGkAtoms::color,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eInteger,
{ nullptr },
GetColor
},
{
&nsGkAtoms::colorIndex,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eInteger,
{ nullptr },
GetColorIndex
},
{
&nsGkAtoms::monochrome,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eInteger,
{ nullptr },
GetMonochrome
},
{
&nsGkAtoms::resolution,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eResolution,
{ nullptr },
GetResolution
},
{
&nsGkAtoms::scan,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eEnumerated,
{ kScanKeywords },
GetScan
},
{
&nsGkAtoms::grid,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ nullptr },
GetGrid
},
// Mozilla extensions
{
&nsGkAtoms::_moz_device_pixel_ratio,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eFloat,
{ nullptr },
GetDevicePixelRatio
},
{
&nsGkAtoms::_moz_device_orientation,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eEnumerated,
{ kOrientationKeywords },
GetDeviceOrientation
},
{
&nsGkAtoms::_moz_is_resource_document,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ nullptr },
GetIsResourceDocument
},
{
&nsGkAtoms::_moz_scrollbar_start_backward,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::scrollbar_start_backward },
GetSystemMetric
},
{
&nsGkAtoms::_moz_scrollbar_start_forward,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::scrollbar_start_forward },
GetSystemMetric
},
{
&nsGkAtoms::_moz_scrollbar_end_backward,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::scrollbar_end_backward },
GetSystemMetric
},
{
&nsGkAtoms::_moz_scrollbar_end_forward,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::scrollbar_end_forward },
GetSystemMetric
},
{
&nsGkAtoms::_moz_scrollbar_thumb_proportional,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::scrollbar_thumb_proportional },
GetSystemMetric
},
{
&nsGkAtoms::_moz_images_in_menus,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::images_in_menus },
GetSystemMetric
},
{
&nsGkAtoms::_moz_images_in_buttons,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::images_in_buttons },
GetSystemMetric
},
{
&nsGkAtoms::_moz_overlay_scrollbars,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::overlay_scrollbars },
GetSystemMetric
},
{
&nsGkAtoms::_moz_windows_default_theme,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::windows_default_theme },
GetSystemMetric
},
{
&nsGkAtoms::_moz_mac_graphite_theme,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::mac_graphite_theme },
GetSystemMetric
},
{
&nsGkAtoms::_moz_mac_lion_theme,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::mac_lion_theme },
GetSystemMetric
},
{
&nsGkAtoms::_moz_windows_compositor,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::windows_compositor },
GetSystemMetric
},
{
&nsGkAtoms::_moz_windows_classic,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::windows_classic },
GetSystemMetric
},
{
&nsGkAtoms::_moz_windows_glass,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::windows_glass },
GetSystemMetric
},
{
&nsGkAtoms::_moz_touch_enabled,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::touch_enabled },
GetSystemMetric
},
{
&nsGkAtoms::_moz_maemo_classic,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::maemo_classic },
GetSystemMetric
},
{
&nsGkAtoms::_moz_menubar_drag,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::menubar_drag },
GetSystemMetric
},
{
&nsGkAtoms::_moz_windows_theme,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eIdent,
{ nullptr },
GetWindowsTheme
},
{
&nsGkAtoms::_moz_os_version,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eIdent,
{ nullptr },
GetOperatinSystemVersion
},
{
&nsGkAtoms::_moz_swipe_animation_enabled,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::swipe_animation_enabled },
GetSystemMetric
},
{
&nsGkAtoms::_moz_physical_home_button,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ &nsGkAtoms::physical_home_button },
GetSystemMetric
},
// Internal -moz-is-glyph media feature: applies only inside SVG glyphs.
// Internal because it is really only useful in the user agent anyway
// and therefore not worth standardizing.
{
&nsGkAtoms::_moz_is_glyph,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
{ nullptr },
GetIsGlyph
},
// Null-mName terminator:
{
nullptr,
nsMediaFeature::eMinMaxAllowed,
nsMediaFeature::eInteger,
{ nullptr },
nullptr
},
};