summaryrefslogtreecommitdiff
path: root/layout/forms/nsButtonFrameRenderer.cpp
blob: 096031385bda481592a2e56f2f390d135668d1c4 (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
/* -*- 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 "nsButtonFrameRenderer.h"
#include "nsCSSRendering.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsCSSPseudoElements.h"
#include "nsNameSpaceManager.h"
#include "mozilla/StyleSetHandle.h"
#include "mozilla/StyleSetHandleInlines.h"
#include "nsDisplayList.h"
#include "nsITheme.h"
#include "nsFrame.h"
#include "mozilla/EventStates.h"
#include "mozilla/dom/Element.h"

#define ACTIVE   "active"
#define HOVER    "hover"
#define FOCUS    "focus"

using namespace mozilla;
using namespace mozilla::image;

nsButtonFrameRenderer::nsButtonFrameRenderer()
{
  MOZ_COUNT_CTOR(nsButtonFrameRenderer);
}

nsButtonFrameRenderer::~nsButtonFrameRenderer()
{
  MOZ_COUNT_DTOR(nsButtonFrameRenderer);

#ifdef DEBUG
  if (mInnerFocusStyle) {
    mInnerFocusStyle->FrameRelease();
  }
  if (mOuterFocusStyle) {
    mOuterFocusStyle->FrameRelease();
  }
#endif
}

void
nsButtonFrameRenderer::SetFrame(nsFrame* aFrame, nsPresContext* aPresContext)
{
  mFrame = aFrame;
  ReResolveStyles(aPresContext);
}

nsIFrame*
nsButtonFrameRenderer::GetFrame()
{
  return mFrame;
}

void
nsButtonFrameRenderer::SetDisabled(bool aDisabled, bool notify)
{
  if (aDisabled)
    mFrame->GetContent()->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
                                  notify);
  else
    mFrame->GetContent()->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, notify);
}

bool
nsButtonFrameRenderer::isDisabled() 
{
  return mFrame->GetContent()->AsElement()->
    State().HasState(NS_EVENT_STATE_DISABLED);
}

class nsDisplayButtonBoxShadowOuter : public nsDisplayItem {
public:
  nsDisplayButtonBoxShadowOuter(nsDisplayListBuilder* aBuilder,
                                nsButtonFrameRenderer* aRenderer)
    : nsDisplayItem(aBuilder, aRenderer->GetFrame()), mBFR(aRenderer) {
    MOZ_COUNT_CTOR(nsDisplayButtonBoxShadowOuter);
  }
#ifdef NS_BUILD_REFCNT_LOGGING
  virtual ~nsDisplayButtonBoxShadowOuter() {
    MOZ_COUNT_DTOR(nsDisplayButtonBoxShadowOuter);
  }
#endif  
  
  virtual void Paint(nsDisplayListBuilder* aBuilder,
                     nsRenderingContext* aCtx) override;
  virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
                           bool* aSnap) override;
  NS_DISPLAY_DECL_NAME("ButtonBoxShadowOuter", TYPE_BUTTON_BOX_SHADOW_OUTER)
private:
  nsButtonFrameRenderer* mBFR;
};

nsRect
nsDisplayButtonBoxShadowOuter::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
  *aSnap = false;
  return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
}

void
nsDisplayButtonBoxShadowOuter::Paint(nsDisplayListBuilder* aBuilder,
                                     nsRenderingContext* aCtx) {
  nsRect frameRect = nsRect(ToReferenceFrame(), mFrame->GetSize());

  nsRect buttonRect;
  mBFR->GetButtonRect(frameRect, buttonRect);

  nsCSSRendering::PaintBoxShadowOuter(mFrame->PresContext(), *aCtx, mFrame,
                                      buttonRect, mVisibleRect);
}

class nsDisplayButtonBorder : public nsDisplayItem {
public:
  nsDisplayButtonBorder(nsDisplayListBuilder* aBuilder,
                                  nsButtonFrameRenderer* aRenderer)
    : nsDisplayItem(aBuilder, aRenderer->GetFrame()), mBFR(aRenderer) {
    MOZ_COUNT_CTOR(nsDisplayButtonBorder);
  }
#ifdef NS_BUILD_REFCNT_LOGGING
  virtual ~nsDisplayButtonBorder() {
    MOZ_COUNT_DTOR(nsDisplayButtonBorder);
  }
#endif
  virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
                       HitTestState* aState,
                       nsTArray<nsIFrame*> *aOutFrames) override {
    aOutFrames->AppendElement(mFrame);
  }
  virtual void Paint(nsDisplayListBuilder* aBuilder,
                     nsRenderingContext* aCtx) override;
  virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
                           bool* aSnap) override;
  virtual nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override;
  virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
                                         const nsDisplayItemGeometry* aGeometry,
                                         nsRegion *aInvalidRegion) override;
  NS_DISPLAY_DECL_NAME("ButtonBorderBackground", TYPE_BUTTON_BORDER_BACKGROUND)
private:
  nsButtonFrameRenderer* mBFR;
};

nsDisplayItemGeometry*
nsDisplayButtonBorder::AllocateGeometry(nsDisplayListBuilder* aBuilder)
{
  return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}

void
nsDisplayButtonBorder::ComputeInvalidationRegion(
  nsDisplayListBuilder* aBuilder,
  const nsDisplayItemGeometry* aGeometry,
  nsRegion *aInvalidRegion)
{
  auto geometry =
    static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);

  if (aBuilder->ShouldSyncDecodeImages() &&
      geometry->ShouldInvalidateToSyncDecodeImages()) {
    bool snap;
    aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
  }

  nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}

void nsDisplayButtonBorder::Paint(nsDisplayListBuilder* aBuilder,
                                  nsRenderingContext* aCtx)
{
  NS_ASSERTION(mFrame, "No frame?");
  nsPresContext* pc = mFrame->PresContext();
  nsRect r = nsRect(ToReferenceFrame(), mFrame->GetSize());

  // draw the border and background inside the focus and outline borders
  DrawResult result =
    mBFR->PaintBorder(aBuilder, pc, *aCtx, mVisibleRect, r);

  nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
}

nsRect
nsDisplayButtonBorder::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
  *aSnap = false;
  return aBuilder->IsForEventDelivery() ? nsRect(ToReferenceFrame(), mFrame->GetSize())
          : mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
}

class nsDisplayButtonForeground : public nsDisplayItem {
public:
  nsDisplayButtonForeground(nsDisplayListBuilder* aBuilder,
                            nsButtonFrameRenderer* aRenderer)
    : nsDisplayItem(aBuilder, aRenderer->GetFrame()), mBFR(aRenderer) {
    MOZ_COUNT_CTOR(nsDisplayButtonForeground);
  }
#ifdef NS_BUILD_REFCNT_LOGGING
  virtual ~nsDisplayButtonForeground() {
    MOZ_COUNT_DTOR(nsDisplayButtonForeground);
  }
#endif  

  nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override;
  void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
                                 const nsDisplayItemGeometry* aGeometry,
                                 nsRegion *aInvalidRegion) override;
  virtual void Paint(nsDisplayListBuilder* aBuilder,
                     nsRenderingContext* aCtx) override;
  NS_DISPLAY_DECL_NAME("ButtonForeground", TYPE_BUTTON_FOREGROUND)
private:
  nsButtonFrameRenderer* mBFR;
};

nsDisplayItemGeometry*
nsDisplayButtonForeground::AllocateGeometry(nsDisplayListBuilder* aBuilder)
{
  return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}

void
nsDisplayButtonForeground::ComputeInvalidationRegion(
  nsDisplayListBuilder* aBuilder,
  const nsDisplayItemGeometry* aGeometry,
  nsRegion* aInvalidRegion)
{
  auto geometry =
    static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);

  if (aBuilder->ShouldSyncDecodeImages() &&
      geometry->ShouldInvalidateToSyncDecodeImages()) {
    bool snap;
    aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
  }

  nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}

void nsDisplayButtonForeground::Paint(nsDisplayListBuilder* aBuilder,
                                      nsRenderingContext* aCtx)
{
  nsPresContext *presContext = mFrame->PresContext();
  const nsStyleDisplay *disp = mFrame->StyleDisplay();
  if (!mFrame->IsThemed(disp) ||
      !presContext->GetTheme()->ThemeDrawsFocusForWidget(disp->mAppearance)) {
    nsRect r = nsRect(ToReferenceFrame(), mFrame->GetSize());

    // Draw the focus and outline borders.
    DrawResult result =
      mBFR->PaintOutlineAndFocusBorders(aBuilder, presContext, *aCtx,
                                        mVisibleRect, r);

    nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
  }
}

nsresult
nsButtonFrameRenderer::DisplayButton(nsDisplayListBuilder* aBuilder,
                                     nsDisplayList* aBackground,
                                     nsDisplayList* aForeground)
{
  if (mFrame->StyleEffects()->mBoxShadow) {
    aBackground->AppendNewToTop(new (aBuilder)
      nsDisplayButtonBoxShadowOuter(aBuilder, this));
  }

  nsRect buttonRect;
  GetButtonRect(mFrame->GetRectRelativeToSelf(), buttonRect);

  nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
    aBuilder, mFrame, buttonRect, aBackground);

  aBackground->AppendNewToTop(new (aBuilder)
    nsDisplayButtonBorder(aBuilder, this));

  // Only display focus rings if we actually have them. Since at most one
  // button would normally display a focus ring, most buttons won't have them.
  if ((mOuterFocusStyle && mOuterFocusStyle->StyleBorder()->HasBorder()) ||
      (mInnerFocusStyle && mInnerFocusStyle->StyleBorder()->HasBorder())) {
    aForeground->AppendNewToTop(new (aBuilder)
      nsDisplayButtonForeground(aBuilder, this));
  }
  return NS_OK;
}

DrawResult
nsButtonFrameRenderer::PaintOutlineAndFocusBorders(
  nsDisplayListBuilder* aBuilder,
  nsPresContext* aPresContext,
  nsRenderingContext& aRenderingContext,
  const nsRect& aDirtyRect,
  const nsRect& aRect)
{
  // once we have all that we'll draw the focus if we have it. We will
  // need to draw 2 focuses, the inner and the outer. This is so we
  // can do any kind of look and feel. Some buttons have focus on the
  // outside like mac and motif. While others like windows have it
  // inside (dotted line).  Usually only one will be specifed. But I
  // guess you could have both if you wanted to.

  nsRect rect;

  PaintBorderFlags flags = aBuilder->ShouldSyncDecodeImages()
                         ? PaintBorderFlags::SYNC_DECODE_IMAGES
                         : PaintBorderFlags();

  DrawResult result = DrawResult::SUCCESS;

  if (mOuterFocusStyle) {
    // ---------- paint the outer focus border -------------

    GetButtonOuterFocusRect(aRect, rect);

    result &=
      nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
                                  aDirtyRect, rect, mOuterFocusStyle, flags);
  }

  if (mInnerFocusStyle) { 
    // ---------- paint the inner focus border -------------

    GetButtonInnerFocusRect(aRect, rect);

    result &=
      nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
                                  aDirtyRect, rect, mInnerFocusStyle, flags);
  }

  return result;
}

DrawResult
nsButtonFrameRenderer::PaintBorder(
  nsDisplayListBuilder* aBuilder,
  nsPresContext* aPresContext,
  nsRenderingContext& aRenderingContext,
  const nsRect& aDirtyRect,
  const nsRect& aRect)
{
  // get the button rect this is inside the focus and outline rects
  nsRect buttonRect;
  GetButtonRect(aRect, buttonRect);

  nsStyleContext* context = mFrame->StyleContext();

  PaintBorderFlags borderFlags = aBuilder->ShouldSyncDecodeImages()
                               ? PaintBorderFlags::SYNC_DECODE_IMAGES
                               : PaintBorderFlags();

  nsCSSRendering::PaintBoxShadowInner(aPresContext, aRenderingContext,
                                      mFrame, buttonRect);

  DrawResult result =
    nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
                                aDirtyRect, buttonRect, context, borderFlags);

  return result;
}


void
nsButtonFrameRenderer::GetButtonOuterFocusRect(const nsRect& aRect, nsRect& focusRect)
{
  focusRect = aRect;
}

void
nsButtonFrameRenderer::GetButtonRect(const nsRect& aRect, nsRect& r)
{
  r = aRect;
  r.Deflate(GetButtonOuterFocusBorderAndPadding());
}


void
nsButtonFrameRenderer::GetButtonInnerFocusRect(const nsRect& aRect, nsRect& focusRect)
{
  GetButtonRect(aRect, focusRect);
  focusRect.Deflate(GetButtonBorderAndPadding());
  focusRect.Deflate(GetButtonInnerFocusMargin());
}


nsMargin
nsButtonFrameRenderer::GetButtonOuterFocusBorderAndPadding()
{
  nsMargin result(0,0,0,0);

  if (mOuterFocusStyle) {
    mOuterFocusStyle->StylePadding()->GetPadding(result);
    result += mOuterFocusStyle->StyleBorder()->GetComputedBorder();
  }

  return result;
}

nsMargin
nsButtonFrameRenderer::GetButtonBorderAndPadding()
{
  return mFrame->GetUsedBorderAndPadding();
}

/**
 * Gets the size of the buttons border this is the union of the normal and disabled borders.
 */
nsMargin
nsButtonFrameRenderer::GetButtonInnerFocusMargin()
{
  nsMargin innerFocusMargin(0,0,0,0);

  if (mInnerFocusStyle) {
    const nsStyleMargin* margin = mInnerFocusStyle->StyleMargin();
    margin->GetMargin(innerFocusMargin);
  }

  return innerFocusMargin;
}

nsMargin
nsButtonFrameRenderer::GetButtonInnerFocusBorderAndPadding()
{
  nsMargin result(0,0,0,0);

  if (mInnerFocusStyle) {
    mInnerFocusStyle->StylePadding()->GetPadding(result);
    result += mInnerFocusStyle->StyleBorder()->GetComputedBorder();
  }

  return result;
}

// gets all the focus borders and padding that will be added to the regular border
nsMargin
nsButtonFrameRenderer::GetAddedButtonBorderAndPadding()
{
  return GetButtonOuterFocusBorderAndPadding() + GetButtonInnerFocusMargin() + GetButtonInnerFocusBorderAndPadding();
}

/**
 * Call this when styles change
 */
void
nsButtonFrameRenderer::ReResolveStyles(nsPresContext* aPresContext)
{
  // get all the styles
  nsStyleContext* context = mFrame->StyleContext();
  StyleSetHandle styleSet = aPresContext->StyleSet();

#ifdef DEBUG
  if (mInnerFocusStyle) {
    mInnerFocusStyle->FrameRelease();
  }
  if (mOuterFocusStyle) {
    mOuterFocusStyle->FrameRelease();
  }
#endif

  // style for the inner such as a dotted line (Windows)
  mInnerFocusStyle =
    styleSet->ProbePseudoElementStyle(mFrame->GetContent()->AsElement(),
                                      CSSPseudoElementType::mozFocusInner,
                                      context);

  // style for outer focus like a ridged border (MAC).
  mOuterFocusStyle =
    styleSet->ProbePseudoElementStyle(mFrame->GetContent()->AsElement(),
                                      CSSPseudoElementType::mozFocusOuter,
                                      context);

#ifdef DEBUG
  if (mInnerFocusStyle) {
    mInnerFocusStyle->FrameAddRef();
  }
  if (mOuterFocusStyle) {
    mOuterFocusStyle->FrameAddRef();
  }
#endif
}

nsStyleContext*
nsButtonFrameRenderer::GetStyleContext(int32_t aIndex) const
{
  switch (aIndex) {
  case NS_BUTTON_RENDERER_FOCUS_INNER_CONTEXT_INDEX:
    return mInnerFocusStyle;
  case NS_BUTTON_RENDERER_FOCUS_OUTER_CONTEXT_INDEX:
    return mOuterFocusStyle;
  default:
    return nullptr;
  }
}

void 
nsButtonFrameRenderer::SetStyleContext(int32_t aIndex, nsStyleContext* aStyleContext)
{
  switch (aIndex) {
  case NS_BUTTON_RENDERER_FOCUS_INNER_CONTEXT_INDEX:
#ifdef DEBUG
    if (mInnerFocusStyle) {
      mInnerFocusStyle->FrameRelease();
    }
#endif
    mInnerFocusStyle = aStyleContext;
    break;
  case NS_BUTTON_RENDERER_FOCUS_OUTER_CONTEXT_INDEX:
#ifdef DEBUG
    if (mOuterFocusStyle) {
      mOuterFocusStyle->FrameRelease();
    }
#endif
    mOuterFocusStyle = aStyleContext;
    break;
  }
#ifdef DEBUG
  aStyleContext->FrameAddRef();
#endif
}