summaryrefslogtreecommitdiffstats
path: root/widget/nsNativeTheme.cpp
blob: 2484f802cd86d3c09975e612e5952229651490a6 (plain)
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
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */

#include "nsNativeTheme.h"
#include "nsIWidget.h"
#include "mozilla/dom/Document.h"
#include "nsIContent.h"
#include "nsIFrame.h"
#include "nsIScrollableFrame.h"
#include "nsLayoutUtils.h"
#include "nsNumberControlFrame.h"
#include "nsPresContext.h"
#include "nsString.h"
#include "nsNameSpaceManager.h"
#include "nsStyleConsts.h"
#include "nsPIDOMWindow.h"
#include "nsProgressFrame.h"
#include "nsMeterFrame.h"
#include "nsRangeFrame.h"
#include "nsCSSRendering.h"
#include "ImageContainer.h"
#include "mozilla/ComputedStyle.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLBodyElement.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/HTMLProgressElement.h"
#include "mozilla/PresShell.h"
#include "mozilla/StaticPrefs_layout.h"
#include "mozilla/dom/DocumentInlines.h"
#include <algorithm>

using namespace mozilla;
using namespace mozilla::dom;

nsNativeTheme::nsNativeTheme() : mAnimatedContentTimeout(UINT32_MAX) {}

NS_IMPL_ISUPPORTS(nsNativeTheme, nsITimerCallback, nsINamed)

/* static */ ElementState nsNativeTheme::GetContentState(
    nsIFrame* aFrame, StyleAppearance aAppearance) {
  if (!aFrame) {
    return ElementState();
  }

  nsIContent* frameContent = aFrame->GetContent();
  if (!frameContent || !frameContent->IsElement()) {
    return ElementState();
  }

  const bool isXULElement = frameContent->IsXULElement();
  if (isXULElement) {
    if (aAppearance == StyleAppearance::Checkbox ||
        aAppearance == StyleAppearance::Radio ||
        aAppearance == StyleAppearance::ToolbarbuttonDropdown ||
        aAppearance == StyleAppearance::ButtonArrowPrevious ||
        aAppearance == StyleAppearance::ButtonArrowNext ||
        aAppearance == StyleAppearance::ButtonArrowUp ||
        aAppearance == StyleAppearance::ButtonArrowDown) {
      aFrame = aFrame->GetParent();
      frameContent = aFrame->GetContent();
    }
    MOZ_ASSERT(frameContent && frameContent->IsElement());
  }

  ElementState flags = frameContent->AsElement()->StyleState();
  nsNumberControlFrame* numberControlFrame =
      nsNumberControlFrame::GetNumberControlFrameForSpinButton(aFrame);
  if (numberControlFrame &&
      numberControlFrame->GetContent()->AsElement()->StyleState().HasState(
          ElementState::DISABLED)) {
    flags |= ElementState::DISABLED;
  }

  if (!isXULElement) {
    return flags;
  }

  if (CheckBooleanAttr(aFrame, nsGkAtoms::disabled)) {
    flags |= ElementState::DISABLED;
  }

  switch (aAppearance) {
    case StyleAppearance::Radio: {
      if (CheckBooleanAttr(aFrame, nsGkAtoms::focused)) {
        flags |= ElementState::FOCUS;
        nsPIDOMWindowOuter* window =
            aFrame->GetContent()->OwnerDoc()->GetWindow();
        if (window && window->ShouldShowFocusRing()) {
          flags |= ElementState::FOCUSRING;
        }
      }
      if (CheckBooleanAttr(aFrame, nsGkAtoms::selected) ||
          CheckBooleanAttr(aFrame, nsGkAtoms::checked)) {
        flags |= ElementState::CHECKED;
      }
      break;
    }
    case StyleAppearance::Checkbox: {
      if (CheckBooleanAttr(aFrame, nsGkAtoms::checked)) {
        flags |= ElementState::CHECKED;
      } else if (CheckBooleanAttr(aFrame, nsGkAtoms::indeterminate)) {
        flags |= ElementState::INDETERMINATE;
      }
      break;
    }
    case StyleAppearance::Toolbarbutton:
      if (CheckBooleanAttr(aFrame, nsGkAtoms::open)) {
        flags |= ElementState::HOVER | ElementState::ACTIVE;
      }
      break;
    case StyleAppearance::MenulistButton:
    case StyleAppearance::Menulist:
    case StyleAppearance::NumberInput:
    case StyleAppearance::Textfield:
    case StyleAppearance::Searchfield:
    case StyleAppearance::Textarea: {
      if (CheckBooleanAttr(aFrame, nsGkAtoms::focused)) {
        flags |= ElementState::FOCUS | ElementState::FOCUSRING;
      }
      break;
    }
    default:
      break;
  }

  return flags;
}

/* static */
bool nsNativeTheme::CheckBooleanAttr(nsIFrame* aFrame, nsAtom* aAtom) {
  if (!aFrame) return false;

  nsIContent* content = aFrame->GetContent();
  if (!content || !content->IsElement()) return false;

  if (content->IsHTMLElement()) return content->AsElement()->HasAttr(aAtom);

  // For XML/XUL elements, an attribute must be equal to the literal
  // string "true" to be counted as true.  An empty string should _not_
  // be counted as true.
  return content->AsElement()->AttrValueIs(kNameSpaceID_None, aAtom, u"true"_ns,
                                           eCaseMatters);
}

/* static */
int32_t nsNativeTheme::CheckIntAttr(nsIFrame* aFrame, nsAtom* aAtom,
                                    int32_t defaultValue) {
  if (!aFrame) return defaultValue;

  nsIContent* content = aFrame->GetContent();
  if (!content || !content->IsElement()) return defaultValue;

  nsAutoString attr;
  content->AsElement()->GetAttr(aAtom, attr);
  nsresult err;
  int32_t value = attr.ToInteger(&err);
  if (attr.IsEmpty() || NS_FAILED(err)) return defaultValue;

  return value;
}

/* static */
double nsNativeTheme::GetProgressValue(nsIFrame* aFrame) {
  if (!aFrame || !aFrame->GetContent()->IsHTMLElement(nsGkAtoms::progress)) {
    return 0;
  }

  return static_cast<HTMLProgressElement*>(aFrame->GetContent())->Value();
}

/* static */
double nsNativeTheme::GetProgressMaxValue(nsIFrame* aFrame) {
  if (!aFrame || !aFrame->GetContent()->IsHTMLElement(nsGkAtoms::progress)) {
    return 100;
  }

  return static_cast<HTMLProgressElement*>(aFrame->GetContent())->Max();
}

bool nsNativeTheme::IsButtonTypeMenu(nsIFrame* aFrame) {
  if (!aFrame) return false;

  nsIContent* content = aFrame->GetContent();
  return content->IsXULElement(nsGkAtoms::button) &&
         content->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
                                           u"menu"_ns, eCaseMatters);
}

bool nsNativeTheme::IsPressedButton(nsIFrame* aFrame) {
  ElementState state = GetContentState(aFrame, StyleAppearance::Toolbarbutton);
  if (state.HasState(ElementState::DISABLED)) {
    return false;
  }

  return IsOpenButton(aFrame) ||
         state.HasAllStates(ElementState::ACTIVE | ElementState::HOVER);
}

bool nsNativeTheme::IsWidgetStyled(nsPresContext* aPresContext,
                                   nsIFrame* aFrame,
                                   StyleAppearance aAppearance) {
  // Check for specific widgets to see if HTML has overridden the style.
  if (!aFrame) {
    return false;
  }

  /**
   * Progress bar appearance should be the same for the bar and the container
   * frame. nsProgressFrame owns the logic and will tell us what we should do.
   */
  if (aAppearance == StyleAppearance::Progresschunk ||
      aAppearance == StyleAppearance::ProgressBar) {
    nsProgressFrame* progressFrame = do_QueryFrame(
        aAppearance == StyleAppearance::Progresschunk ? aFrame->GetParent()
                                                      : aFrame);
    if (progressFrame) {
      return !progressFrame->ShouldUseNativeStyle();
    }
  }

  /**
   * Meter bar appearance should be the same for the bar and the container
   * frame. nsMeterFrame owns the logic and will tell us what we should do.
   */
  if (aAppearance == StyleAppearance::Meterchunk ||
      aAppearance == StyleAppearance::Meter) {
    nsMeterFrame* meterFrame = do_QueryFrame(
        aAppearance == StyleAppearance::Meterchunk ? aFrame->GetParent()
                                                   : aFrame);
    if (meterFrame) {
      return !meterFrame->ShouldUseNativeStyle();
    }
  }

  /**
   * An nsRangeFrame and its children are treated atomically when it
   * comes to native theming (either all parts, or no parts, are themed).
   * nsRangeFrame owns the logic and will tell us what we should do.
   */
  if (aAppearance == StyleAppearance::Range ||
      aAppearance == StyleAppearance::RangeThumb) {
    nsRangeFrame* rangeFrame = do_QueryFrame(
        aAppearance == StyleAppearance::RangeThumb ? aFrame->GetParent()
                                                   : aFrame);
    if (rangeFrame) {
      return !rangeFrame->ShouldUseNativeStyle();
    }
  }

  return nsLayoutUtils::AuthorSpecifiedBorderBackgroundDisablesTheming(
             aAppearance) &&
         aFrame->GetContent()->IsHTMLElement() &&
         aFrame->Style()->HasAuthorSpecifiedBorderOrBackground();
}

/* static */
bool nsNativeTheme::IsFrameRTL(nsIFrame* aFrame) {
  if (!aFrame) {
    return false;
  }
  return aFrame->GetWritingMode().IsPhysicalRTL();
}

/* static */
bool nsNativeTheme::IsHTMLContent(nsIFrame* aFrame) {
  if (!aFrame) {
    return false;
  }
  nsIContent* content = aFrame->GetContent();
  return content && content->IsHTMLElement();
}

// treeheadercell:
nsNativeTheme::TreeSortDirection nsNativeTheme::GetTreeSortDirection(
    nsIFrame* aFrame) {
  if (!aFrame || !aFrame->GetContent()) return eTreeSortDirection_Natural;

  static Element::AttrValuesArray strings[] = {nsGkAtoms::descending,
                                               nsGkAtoms::ascending, nullptr};

  nsIContent* content = aFrame->GetContent();
  if (content->IsElement()) {
    switch (content->AsElement()->FindAttrValueIn(
        kNameSpaceID_None, nsGkAtoms::sortDirection, strings, eCaseMatters)) {
      case 0:
        return eTreeSortDirection_Descending;
      case 1:
        return eTreeSortDirection_Ascending;
    }
  }

  return eTreeSortDirection_Natural;
}

bool nsNativeTheme::IsLastTreeHeaderCell(nsIFrame* aFrame) {
  if (!aFrame) {
    return false;
  }

  // A tree column picker button is always the last header cell.
  if (aFrame->GetContent()->IsXULElement(nsGkAtoms::button)) {
    return true;
  }

  // Find the parent tree.
  nsIContent* parent = aFrame->GetContent()->GetParent();
  while (parent && !parent->IsXULElement(nsGkAtoms::tree)) {
    parent = parent->GetParent();
  }

  // If the column picker is visible, this can't be the last column.
  if (parent && !parent->AsElement()->AttrValueIs(kNameSpaceID_None,
                                                  nsGkAtoms::hidecolumnpicker,
                                                  u"true"_ns, eCaseMatters))
    return false;

  while ((aFrame = aFrame->GetNextSibling())) {
    if (aFrame->GetRect().Width() > 0) return false;
  }
  return true;
}

// tab:
bool nsNativeTheme::IsBottomTab(nsIFrame* aFrame) {
  if (!aFrame) return false;

  nsAutoString classStr;
  if (aFrame->GetContent()->IsElement()) {
    aFrame->GetContent()->AsElement()->GetAttr(nsGkAtoms::_class, classStr);
  }
  // FIXME: This looks bogus, shouldn't this be looking at GetClasses()?
  return !classStr.IsEmpty() && classStr.Find(u"tab-bottom") != kNotFound;
}

bool nsNativeTheme::IsFirstTab(nsIFrame* aFrame) {
  if (!aFrame) return false;

  for (nsIFrame* first : aFrame->GetParent()->PrincipalChildList()) {
    if (first->GetRect().Width() > 0 &&
        first->GetContent()->IsXULElement(nsGkAtoms::tab))
      return (first == aFrame);
  }
  return false;
}

bool nsNativeTheme::IsHorizontal(nsIFrame* aFrame) {
  if (!aFrame) return false;

  if (!aFrame->GetContent()->IsElement()) return true;

  return !aFrame->GetContent()->AsElement()->AttrValueIs(
      kNameSpaceID_None, nsGkAtoms::orient, nsGkAtoms::vertical, eCaseMatters);
}

bool nsNativeTheme::IsNextToSelectedTab(nsIFrame* aFrame, int32_t aOffset) {
  if (!aFrame) return false;

  if (aOffset == 0) return IsSelectedTab(aFrame);

  int32_t thisTabIndex = -1, selectedTabIndex = -1;

  nsIFrame* currentTab = aFrame->GetParent()->PrincipalChildList().FirstChild();
  for (int32_t i = 0; currentTab; currentTab = currentTab->GetNextSibling()) {
    if (currentTab->GetRect().Width() == 0) continue;
    if (aFrame == currentTab) thisTabIndex = i;
    if (IsSelectedTab(currentTab)) selectedTabIndex = i;
    ++i;
  }

  if (thisTabIndex == -1 || selectedTabIndex == -1) return false;

  return (thisTabIndex - selectedTabIndex == aOffset);
}

bool nsNativeTheme::IsVerticalProgress(nsIFrame* aFrame) {
  if (!aFrame) {
    return false;
  }
  return IsVerticalMeter(aFrame);
}

bool nsNativeTheme::IsVerticalMeter(nsIFrame* aFrame) {
  MOZ_ASSERT(aFrame, "You have to pass a non-null aFrame");
  switch (aFrame->StyleDisplay()->mOrient) {
    case StyleOrient::Horizontal:
      return false;
    case StyleOrient::Vertical:
      return true;
    case StyleOrient::Inline:
      return aFrame->GetWritingMode().IsVertical();
    case StyleOrient::Block:
      return !aFrame->GetWritingMode().IsVertical();
  }
  MOZ_ASSERT_UNREACHABLE("unexpected -moz-orient value");
  return false;
}

// menupopup:
bool nsNativeTheme::IsSubmenu(nsIFrame* aFrame, bool* aLeftOfParent) {
  if (!aFrame) return false;

  nsIContent* parentContent = aFrame->GetContent()->GetParent();
  if (!parentContent || !parentContent->IsXULElement(nsGkAtoms::menu))
    return false;

  nsIFrame* parent = aFrame;
  while ((parent = parent->GetParent())) {
    if (parent->GetContent() == parentContent) {
      if (aLeftOfParent) {
        LayoutDeviceIntRect selfBounds, parentBounds;
        selfBounds = aFrame->GetNearestWidget()->GetScreenBounds();
        parentBounds = parent->GetNearestWidget()->GetScreenBounds();
        *aLeftOfParent = selfBounds.X() < parentBounds.X();
      }
      return true;
    }
  }

  return false;
}

bool nsNativeTheme::QueueAnimatedContentForRefresh(nsIContent* aContent,
                                                   uint32_t aMinimumFrameRate) {
  NS_ASSERTION(aContent, "Null pointer!");
  NS_ASSERTION(aMinimumFrameRate, "aMinimumFrameRate must be non-zero!");
  NS_ASSERTION(aMinimumFrameRate <= 1000,
               "aMinimumFrameRate must be less than 1000!");

  uint32_t timeout = 1000 / aMinimumFrameRate;
  timeout = std::min(mAnimatedContentTimeout, timeout);

  if (!mAnimatedContentTimer) {
    mAnimatedContentTimer = NS_NewTimer();
    NS_ENSURE_TRUE(mAnimatedContentTimer, false);
  }

  if (mAnimatedContentList.IsEmpty() || timeout != mAnimatedContentTimeout) {
    nsresult rv;
    if (!mAnimatedContentList.IsEmpty()) {
      rv = mAnimatedContentTimer->Cancel();
      NS_ENSURE_SUCCESS(rv, false);
    }

    if (XRE_IsContentProcess() && NS_IsMainThread()) {
      mAnimatedContentTimer->SetTarget(GetMainThreadSerialEventTarget());
    }
    rv = mAnimatedContentTimer->InitWithCallback(this, timeout,
                                                 nsITimer::TYPE_ONE_SHOT);
    NS_ENSURE_SUCCESS(rv, false);

    mAnimatedContentTimeout = timeout;
  }

  // XXX(Bug 1631371) Check if this should use a fallible operation as it
  // pretended earlier.
  mAnimatedContentList.AppendElement(aContent);

  return true;
}

NS_IMETHODIMP
nsNativeTheme::Notify(nsITimer* aTimer) {
  NS_ASSERTION(aTimer == mAnimatedContentTimer, "Wrong timer!");

  // XXX Assumes that calling nsIFrame::Invalidate won't reenter
  //     QueueAnimatedContentForRefresh.

  uint32_t count = mAnimatedContentList.Length();
  for (uint32_t index = 0; index < count; index++) {
    nsIFrame* frame = mAnimatedContentList[index]->GetPrimaryFrame();
    if (frame) {
      frame->InvalidateFrame();
    }
  }

  mAnimatedContentList.Clear();
  mAnimatedContentTimeout = UINT32_MAX;
  return NS_OK;
}

NS_IMETHODIMP
nsNativeTheme::GetName(nsACString& aName) {
  aName.AssignLiteral("nsNativeTheme");
  return NS_OK;
}

nsIFrame* nsNativeTheme::GetAdjacentSiblingFrameWithSameAppearance(
    nsIFrame* aFrame, bool aNextSibling) {
  if (!aFrame) return nullptr;

  // Find the next visible sibling.
  nsIFrame* sibling = aFrame;
  do {
    sibling =
        aNextSibling ? sibling->GetNextSibling() : sibling->GetPrevSibling();
  } while (sibling && sibling->GetRect().Width() == 0);

  // Check same appearance and adjacency.
  if (!sibling ||
      sibling->StyleDisplay()->EffectiveAppearance() !=
          aFrame->StyleDisplay()->EffectiveAppearance() ||
      (sibling->GetRect().XMost() != aFrame->GetRect().X() &&
       aFrame->GetRect().XMost() != sibling->GetRect().X()))
    return nullptr;
  return sibling;
}

bool nsNativeTheme::IsRangeHorizontal(nsIFrame* aFrame) {
  nsIFrame* rangeFrame = aFrame;
  if (!rangeFrame->IsRangeFrame()) {
    // If the thumb's frame is passed in, get its range parent:
    rangeFrame = aFrame->GetParent();
  }
  if (rangeFrame->IsRangeFrame()) {
    return static_cast<nsRangeFrame*>(rangeFrame)->IsHorizontal();
  }
  // Not actually a range frame - just use the ratio of the frame's size to
  // decide:
  return aFrame->GetSize().width >= aFrame->GetSize().height;
}

/* static */
bool nsNativeTheme::IsDarkBackgroundForScrollbar(nsIFrame* aFrame) {
  // Try to find the scrolled frame. Note that for stuff like xul <tree> there
  // might be none.
  {
    nsIFrame* frame = aFrame;
    nsIScrollableFrame* scrollFrame = nullptr;
    while (!scrollFrame && frame) {
      scrollFrame = frame->GetScrollTargetFrame();
      frame = frame->GetParent();
    }
    if (scrollFrame) {
      aFrame = scrollFrame->GetScrolledFrame();
    } else {
      // Leave aFrame untouched.
    }
  }

  return IsDarkBackground(aFrame);
}

/* static */
bool nsNativeTheme::IsDarkBackground(nsIFrame* aFrame) {
  auto color =
      nsCSSRendering::FindEffectiveBackgroundColor(
          aFrame, /* aStopAtThemed = */ false, /* aPreferBodyToCanvas = */ true)
          .mColor;
  return LookAndFeel::IsDarkColor(color);
}

/*static*/
bool nsNativeTheme::IsWidgetScrollbarPart(StyleAppearance aAppearance) {
  switch (aAppearance) {
    case StyleAppearance::ScrollbarVertical:
    case StyleAppearance::ScrollbarHorizontal:
    case StyleAppearance::ScrollbarbuttonUp:
    case StyleAppearance::ScrollbarbuttonDown:
    case StyleAppearance::ScrollbarbuttonLeft:
    case StyleAppearance::ScrollbarbuttonRight:
    case StyleAppearance::ScrollbarthumbVertical:
    case StyleAppearance::ScrollbarthumbHorizontal:
    case StyleAppearance::ScrollbartrackHorizontal:
    case StyleAppearance::ScrollbartrackVertical:
    case StyleAppearance::Scrollcorner:
      return true;
    default:
      return false;
  }
}

/*static*/
bool nsNativeTheme::IsWidgetAlwaysNonNative(nsIFrame* aFrame,
                                            StyleAppearance aAppearance) {
  return IsWidgetScrollbarPart(aAppearance) ||
         aAppearance == StyleAppearance::FocusOutline ||
         (aFrame && aFrame->StyleUI()->mMozTheme == StyleMozTheme::NonNative);
}