Line data Source code
1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* This Source Code Form is subject to the terms of the Mozilla Public
3 : * License, v. 2.0. If a copy of the MPL was not distributed with this
4 : * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 :
6 : /* a presentation of a document, part 1 */
7 :
8 : #include "mozilla/ArrayUtils.h"
9 : #include "mozilla/DebugOnly.h"
10 : #include "mozilla/Encoding.h"
11 : #include "mozilla/EventDispatcher.h"
12 : #include "mozilla/EventStateManager.h"
13 :
14 : #include "base/basictypes.h"
15 :
16 : #include "nsCOMPtr.h"
17 : #include "nsPresContext.h"
18 : #include "nsIPresShell.h"
19 : #include "nsIPresShellInlines.h"
20 : #include "nsDocShell.h"
21 : #include "nsIContentViewer.h"
22 : #include "nsPIDOMWindow.h"
23 : #include "mozilla/StyleSetHandle.h"
24 : #include "mozilla/StyleSetHandleInlines.h"
25 : #include "nsIContent.h"
26 : #include "nsIFrame.h"
27 : #include "nsIDocument.h"
28 : #include "nsIPrintSettings.h"
29 : #include "nsLanguageAtomService.h"
30 : #include "mozilla/LookAndFeel.h"
31 : #include "nsIInterfaceRequestorUtils.h"
32 : #include "nsIDOMHTMLDocument.h"
33 : #include "nsIDOMHTMLElement.h"
34 : #include "nsIWeakReferenceUtils.h"
35 : #include "nsThreadUtils.h"
36 : #include "nsFrameManager.h"
37 : #include "nsLayoutUtils.h"
38 : #include "nsViewManager.h"
39 : #include "mozilla/GeckoRestyleManager.h"
40 : #include "mozilla/RestyleManager.h"
41 : #include "mozilla/RestyleManagerInlines.h"
42 : #include "SurfaceCacheUtils.h"
43 : #include "nsCSSRuleProcessor.h"
44 : #include "nsRuleNode.h"
45 : #include "gfxPlatform.h"
46 : #include "nsCSSRules.h"
47 : #include "nsFontFaceLoader.h"
48 : #include "mozilla/EffectCompositor.h"
49 : #include "mozilla/EventListenerManager.h"
50 : #include "prenv.h"
51 : #include "nsPluginFrame.h"
52 : #include "nsTransitionManager.h"
53 : #include "nsAnimationManager.h"
54 : #include "CounterStyleManager.h"
55 : #include "mozilla/MemoryReporting.h"
56 : #include "mozilla/dom/Element.h"
57 : #include "nsIMessageManager.h"
58 : #include "mozilla/dom/MediaQueryList.h"
59 : #include "nsSMILAnimationController.h"
60 : #include "mozilla/css/ImageLoader.h"
61 : #include "mozilla/dom/PBrowserParent.h"
62 : #include "mozilla/dom/TabChild.h"
63 : #include "mozilla/dom/TabParent.h"
64 : #include "nsRefreshDriver.h"
65 : #include "Layers.h"
66 : #include "LayerUserData.h"
67 : #include "ClientLayerManager.h"
68 : #include "mozilla/dom/NotifyPaintEvent.h"
69 : #include "gfxPrefs.h"
70 : #include "nsIDOMChromeWindow.h"
71 : #include "nsFrameLoader.h"
72 : #include "mozilla/dom/FontFaceSet.h"
73 : #include "nsContentUtils.h"
74 : #include "nsPIWindowRoot.h"
75 : #include "mozilla/Preferences.h"
76 : #include "gfxTextRun.h"
77 : #include "nsFontFaceUtils.h"
78 : #include "nsLayoutStylesheetCache.h"
79 : #include "mozilla/ServoBindings.h"
80 : #include "mozilla/StyleSheet.h"
81 : #include "mozilla/StyleSheetInlines.h"
82 : #include "mozilla/Telemetry.h"
83 : #include "mozilla/dom/Performance.h"
84 : #include "mozilla/dom/PerformanceTiming.h"
85 : #include "mozilla/layers/APZThreadUtils.h"
86 :
87 : // Needed for Start/Stop of Image Animation
88 : #include "imgIContainer.h"
89 : #include "nsIImageLoadingContent.h"
90 :
91 : #include "nsCSSParser.h"
92 : #include "nsBidiUtils.h"
93 : #include "nsServiceManagerUtils.h"
94 : #include "nsBidi.h"
95 :
96 : #include "mozilla/dom/URL.h"
97 :
98 : using namespace mozilla;
99 : using namespace mozilla::dom;
100 : using namespace mozilla::layers;
101 :
102 : uint8_t gNotifySubDocInvalidationData;
103 :
104 : // This preference was first introduced in Bug 232227, in order to prevent
105 : // system colors from being exposed to CSS or canvas.
106 : constexpr char kUseStandinsForNativeColors[] = "ui.use_standins_for_native_colors";
107 :
108 : /**
109 : * Layer UserData for ContainerLayers that want to be notified
110 : * of local invalidations of them and their descendant layers.
111 : * Pass a callback to ComputeDifferences to have these called.
112 : */
113 0 : class ContainerLayerPresContext : public LayerUserData {
114 : public:
115 : nsPresContext* mPresContext;
116 : };
117 :
118 : namespace {
119 :
120 6 : class CharSetChangingRunnable : public Runnable
121 : {
122 : public:
123 2 : CharSetChangingRunnable(nsPresContext* aPresContext,
124 : NotNull<const Encoding*> aCharSet)
125 2 : : Runnable("CharSetChangingRunnable"),
126 : mPresContext(aPresContext),
127 2 : mCharSet(aCharSet)
128 : {
129 2 : }
130 :
131 2 : NS_IMETHOD Run() override
132 : {
133 2 : mPresContext->DoChangeCharSet(mCharSet);
134 2 : return NS_OK;
135 : }
136 :
137 : private:
138 : RefPtr<nsPresContext> mPresContext;
139 : NotNull<const Encoding*> mCharSet;
140 : };
141 :
142 : } // namespace
143 :
144 : nscolor
145 152 : nsPresContext::MakeColorPref(const nsString& aColor)
146 : {
147 304 : nsCSSParser parser;
148 304 : nsCSSValue value;
149 152 : if (!parser.ParseColorString(aColor, nullptr, 0, value)) {
150 : // Any better choices?
151 0 : return NS_RGB(0, 0, 0);
152 : }
153 :
154 : nscolor color;
155 152 : return nsRuleNode::ComputeColor(value, this, nullptr, color)
156 152 : ? color
157 152 : : NS_RGB(0, 0, 0);
158 : }
159 :
160 : bool
161 0 : nsPresContext::IsDOMPaintEventPending()
162 : {
163 0 : if (mFireAfterPaintEvents) {
164 0 : return true;
165 : }
166 0 : nsRootPresContext* drpc = GetRootPresContext();
167 0 : if (drpc && drpc->mRefreshDriver->ViewManagerFlushIsPending()) {
168 : // Since we're promising that there will be a MozAfterPaint event
169 : // fired, we record an empty invalidation in case display list
170 : // invalidation doesn't invalidate anything further.
171 0 : NotifyInvalidation(drpc->mRefreshDriver->LastTransactionId() + 1, nsRect(0, 0, 0, 0));
172 0 : NS_ASSERTION(mFireAfterPaintEvents, "Why aren't we planning to fire the event?");
173 0 : return true;
174 : }
175 0 : return false;
176 : }
177 :
178 : void
179 0 : nsPresContext::PrefChangedCallback(const char* aPrefName, void* instance_data)
180 : {
181 : RefPtr<nsPresContext> presContext =
182 0 : static_cast<nsPresContext*>(instance_data);
183 :
184 0 : NS_ASSERTION(nullptr != presContext, "bad instance data");
185 0 : if (nullptr != presContext) {
186 0 : presContext->PreferenceChanged(aPrefName);
187 : }
188 0 : }
189 :
190 : void
191 0 : nsPresContext::PrefChangedUpdateTimerCallback(nsITimer *aTimer, void *aClosure)
192 : {
193 0 : nsPresContext* presContext = (nsPresContext*)aClosure;
194 0 : NS_ASSERTION(presContext != nullptr, "bad instance data");
195 0 : if (presContext)
196 0 : presContext->UpdateAfterPreferencesChanged();
197 0 : }
198 :
199 : static bool
200 30 : IsVisualCharset(NotNull<const Encoding*> aCharset)
201 : {
202 30 : return aCharset == ISO_8859_8_ENCODING;
203 : }
204 :
205 28 : nsPresContext::nsPresContext(nsIDocument* aDocument, nsPresContextType aType)
206 : : mType(aType),
207 : mShell(nullptr),
208 : mDocument(aDocument),
209 28 : mMedium(aType == eContext_Galley ? nsGkAtoms::screen : nsGkAtoms::print),
210 : mMediaEmulated(mMedium),
211 : mLinkHandler(nullptr),
212 : mInflationDisabledForShrinkWrap(false),
213 : mBaseMinFontSize(0),
214 : mSystemFontScale(1.0),
215 : mTextZoom(1.0),
216 : mEffectiveTextZoom(1.0),
217 : mFullZoom(1.0),
218 : mOverrideDPPX(0.0),
219 : mLastFontInflationScreenSize(gfxSize(-1.0, -1.0)),
220 : mCurAppUnitsPerDevPixel(0),
221 : mAutoQualityMinFontSizePixelsPref(0),
222 : mPageSize(-1, -1),
223 : mPageScale(0.0),
224 : mPPScale(1.0f),
225 : mDefaultColor(NS_RGBA(0,0,0,0)),
226 : mBackgroundColor(NS_RGB(0xFF, 0xFF, 0xFF)),
227 : mLinkColor(NS_RGB(0x00, 0x00, 0xEE)),
228 : mActiveLinkColor(NS_RGB(0xEE, 0x00, 0x00)),
229 : mVisitedLinkColor(NS_RGB(0x55, 0x1A, 0x8B)),
230 28 : mFocusBackgroundColor(mBackgroundColor),
231 28 : mFocusTextColor(mDefaultColor),
232 28 : mBodyTextColor(mDefaultColor),
233 : mViewportScrollbarOverrideNode(nullptr),
234 : mViewportStyleScrollbar(NS_STYLE_OVERFLOW_AUTO, NS_STYLE_OVERFLOW_AUTO),
235 : mFocusRingWidth(1),
236 : mExistThrottledUpdates(false),
237 : // mImageAnimationMode is initialised below, in constructor body
238 : mImageAnimationModePref(imgIContainer::kNormalAnimMode),
239 : mFontGroupCacheDirty(true),
240 : mInterruptChecksToSkip(0),
241 : mElementsRestyled(0),
242 : mFramesConstructed(0),
243 : mFramesReflowed(0),
244 : mInteractionTimeEnabled(true),
245 : mTelemetryScrollLastY(0),
246 : mTelemetryScrollMaxY(0),
247 : mTelemetryScrollTotalY(0),
248 : mHasPendingInterrupt(false),
249 : mPendingInterruptFromTest(false),
250 : mInterruptsEnabled(false),
251 : mUseDocumentFonts(true),
252 : mUseDocumentColors(true),
253 : mUnderlineLinks(true),
254 : mSendAfterPaintToContent(false),
255 : mUseFocusColors(false),
256 : mFocusRingOnAnything(false),
257 : mFocusRingStyle(false),
258 : mDrawImageBackground(true), // always draw the background
259 : mDrawColorBackground(true),
260 : // mNeverAnimate is initialised below, in constructor body
261 : mIsRenderingOnlySelection(false),
262 28 : mPaginated(aType != eContext_Galley),
263 : mCanPaginatedScroll(false),
264 : mDoScaledTwips(true),
265 : mIsRootPaginatedDocument(false),
266 : mPrefBidiDirection(false),
267 : mPrefScrollbarSide(0),
268 : mPendingSysColorChanged(false),
269 : mPendingThemeChanged(false),
270 : mPendingUIResolutionChanged(false),
271 : mPendingMediaFeatureValuesChanged(false),
272 : mPrefChangePendingNeedsReflow(false),
273 : mIsEmulatingMedia(false),
274 : mIsGlyph(false),
275 : mUsesRootEMUnits(false),
276 : mUsesExChUnits(false),
277 : mUsesViewportUnits(false),
278 : mPendingViewportChange(false),
279 : mCounterStylesDirty(true),
280 : mPostedFlushCounterStyles(false),
281 : mSuppressResizeReflow(false),
282 : mIsVisual(false),
283 : mFireAfterPaintEvents(false),
284 : mIsChrome(false),
285 : mIsChromeOriginImage(false),
286 : mPaintFlashing(false),
287 : mPaintFlashingInitialized(false),
288 : mHasWarnedAboutPositionedTableParts(false),
289 : mHasWarnedAboutTooLargeDashedOrDottedRadius(false),
290 : mQuirkSheetAdded(false),
291 : mNeedsPrefUpdate(false),
292 : mHadNonBlankPaint(false)
293 : #ifdef RESTYLE_LOGGING
294 : , mRestyleLoggingEnabled(false)
295 : #endif
296 : #ifdef DEBUG
297 168 : , mInitialized(false)
298 : #endif
299 : {
300 28 : PodZero(&mBorderWidthTable);
301 : #ifdef DEBUG
302 28 : PodZero(&mLayoutPhaseCount);
303 : #endif
304 :
305 28 : if (!IsDynamic()) {
306 0 : mImageAnimationMode = imgIContainer::kDontAnimMode;
307 0 : mNeverAnimate = true;
308 : } else {
309 28 : mImageAnimationMode = imgIContainer::kNormalAnimMode;
310 28 : mNeverAnimate = false;
311 : }
312 28 : NS_ASSERTION(mDocument, "Null document");
313 :
314 : // if text perf logging enabled, init stats struct
315 28 : if (MOZ_LOG_TEST(gfxPlatform::GetLog(eGfxLog_textperf), LogLevel::Warning)) {
316 0 : mTextPerf = new gfxTextPerfMetrics();
317 : }
318 :
319 28 : if (Preferences::GetBool(GFX_MISSING_FONTS_NOTIFY_PREF)) {
320 0 : mMissingFonts = new gfxMissingFontRecorder();
321 : }
322 28 : }
323 :
324 : void
325 0 : nsPresContext::Destroy()
326 : {
327 0 : if (mEventManager) {
328 : // unclear if these are needed, but can't hurt
329 0 : mEventManager->NotifyDestroyPresContext(this);
330 0 : mEventManager->SetPresContext(nullptr);
331 0 : mEventManager = nullptr;
332 : }
333 :
334 0 : if (mPrefChangedTimer)
335 : {
336 0 : mPrefChangedTimer->Cancel();
337 0 : mPrefChangedTimer = nullptr;
338 : }
339 :
340 : // Unregister preference callbacks
341 : Preferences::UnregisterPrefixCallback(nsPresContext::PrefChangedCallback,
342 : "font.",
343 0 : this);
344 : Preferences::UnregisterPrefixCallback(nsPresContext::PrefChangedCallback,
345 : "browser.display.",
346 0 : this);
347 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
348 : "browser.underline_anchors",
349 0 : this);
350 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
351 : "browser.anchor_color",
352 0 : this);
353 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
354 : "browser.active_color",
355 0 : this);
356 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
357 : "browser.visited_color",
358 0 : this);
359 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
360 : "image.animation_mode",
361 0 : this);
362 : Preferences::UnregisterPrefixCallback(nsPresContext::PrefChangedCallback,
363 : "bidi.",
364 0 : this);
365 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
366 : "dom.send_after_paint_to_content",
367 0 : this);
368 : Preferences::UnregisterPrefixCallback(nsPresContext::PrefChangedCallback,
369 : "gfx.font_rendering.",
370 0 : this);
371 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
372 : "layout.css.dpi",
373 0 : this);
374 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
375 : "layout.css.devPixelsPerPx",
376 0 : this);
377 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
378 : "nglayout.debug.paint_flashing",
379 0 : this);
380 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
381 : "nglayout.debug.paint_flashing_chrome",
382 0 : this);
383 : Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
384 : kUseStandinsForNativeColors,
385 0 : this);
386 :
387 0 : mRefreshDriver = nullptr;
388 0 : }
389 :
390 0 : nsPresContext::~nsPresContext()
391 : {
392 0 : NS_PRECONDITION(!mShell, "Presshell forgot to clear our mShell pointer");
393 0 : DetachShell();
394 :
395 0 : Destroy();
396 0 : }
397 :
398 28 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPresContext)
399 0 : NS_INTERFACE_MAP_ENTRY(nsISupports)
400 0 : NS_INTERFACE_MAP_ENTRY(nsIObserver)
401 0 : NS_INTERFACE_MAP_END
402 :
403 4606 : NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPresContext)
404 4509 : NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(nsPresContext, LastRelease())
405 :
406 : void
407 3 : nsPresContext::LastRelease()
408 : {
409 3 : if (IsRoot()) {
410 2 : static_cast<nsRootPresContext*>(this)->CancelAllDidPaintTimers();
411 : }
412 3 : if (mMissingFonts) {
413 0 : mMissingFonts->Clear();
414 : }
415 3 : }
416 :
417 : NS_IMPL_CYCLE_COLLECTION_CLASS(nsPresContext)
418 :
419 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsPresContext)
420 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAnimationManager);
421 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocument);
422 : // NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mDeviceContext); // not xpcom
423 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEffectCompositor);
424 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEventManager);
425 : // NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mLanguage); // an atom
426 :
427 : // NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTheme); // a service
428 : // NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLangService); // a service
429 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPrintSettings);
430 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPrefChangedTimer);
431 0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
432 :
433 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsPresContext)
434 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK(mAnimationManager);
435 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocument);
436 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK(mDeviceContext); // worth bothering?
437 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK(mEffectCompositor);
438 : // NS_RELEASE(tmp->mLanguage); // an atom
439 : // NS_IMPL_CYCLE_COLLECTION_UNLINK(mTheme); // a service
440 : // NS_IMPL_CYCLE_COLLECTION_UNLINK(mLangService); // a service
441 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK(mPrintSettings);
442 :
443 0 : tmp->Destroy();
444 0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_END
445 :
446 : // whether no native theme service exists;
447 : // if this gets set to true, we'll stop asking for it.
448 : static bool sNoTheme = false;
449 :
450 : // Set to true when LookAndFeelChanged needs to be called. This is used
451 : // because the look and feel is a service, so there's no need to notify it from
452 : // more than one prescontext.
453 : static bool sLookAndFeelChanged;
454 :
455 : // Set to true when ThemeChanged needs to be called on mTheme. This is used
456 : // because mTheme is a service, so there's no need to notify it from more than
457 : // one prescontext.
458 : static bool sThemeChanged;
459 :
460 : void
461 35 : nsPresContext::GetDocumentColorPreferences()
462 : {
463 : // Make sure the preferences are initialized. In the normal run,
464 : // they would already be, because gfxPlatform would have been created,
465 : // but in some reference tests, that is not the case.
466 35 : gfxPrefs::GetSingleton();
467 :
468 35 : int32_t useAccessibilityTheme = 0;
469 35 : bool usePrefColors = true;
470 35 : bool isChromeDocShell = false;
471 : static int32_t sDocumentColorsSetting;
472 : static bool sDocumentColorsSettingPrefCached = false;
473 : static bool sUseStandinsForNativeColors = false;
474 35 : if (!sDocumentColorsSettingPrefCached) {
475 2 : sDocumentColorsSettingPrefCached = true;
476 : Preferences::AddIntVarCache(&sDocumentColorsSetting,
477 : "browser.display.document_color_use",
478 2 : 0);
479 :
480 : // The preference "ui.use_standins_for_native_colors" also affects
481 : // default foreground and background colors.
482 : Preferences::AddBoolVarCache(&sUseStandinsForNativeColors,
483 2 : kUseStandinsForNativeColors);
484 : }
485 :
486 35 : nsIDocument* doc = mDocument->GetDisplayDocument();
487 35 : if (doc && doc->GetDocShell()) {
488 0 : isChromeDocShell = nsIDocShellTreeItem::typeChrome ==
489 0 : doc->GetDocShell()->ItemType();
490 : } else {
491 70 : nsCOMPtr<nsIDocShellTreeItem> docShell(mContainer);
492 35 : if (docShell) {
493 14 : isChromeDocShell = nsIDocShellTreeItem::typeChrome == docShell->ItemType();
494 : }
495 : }
496 :
497 56 : mIsChromeOriginImage = mDocument->IsBeingUsedAsImage() &&
498 21 : IsChromeURI(mDocument->GetDocumentURI());
499 :
500 35 : if (isChromeDocShell || mIsChromeOriginImage) {
501 29 : usePrefColors = false;
502 : } else {
503 : useAccessibilityTheme =
504 6 : LookAndFeel::GetInt(LookAndFeel::eIntID_UseAccessibilityTheme, 0);
505 6 : usePrefColors = !useAccessibilityTheme;
506 : }
507 35 : if (usePrefColors) {
508 6 : usePrefColors =
509 6 : !Preferences::GetBool("browser.display.use_system_colors", false);
510 : }
511 :
512 35 : if (sUseStandinsForNativeColors) {
513 : // Once the preference "ui.use_standins_for_native_colors" is enabled,
514 : // use fixed color values instead of prefered colors and system colors.
515 0 : mDefaultColor = LookAndFeel::GetColorUsingStandins(
516 : LookAndFeel::eColorID_windowtext, NS_RGB(0x00, 0x00, 0x00));
517 0 : mBackgroundColor = LookAndFeel::GetColorUsingStandins(
518 : LookAndFeel::eColorID_window, NS_RGB(0xff, 0xff, 0xff));
519 35 : } else if (usePrefColors) {
520 : nsAdoptingString colorStr =
521 12 : Preferences::GetString("browser.display.foreground_color");
522 :
523 6 : if (!colorStr.IsEmpty()) {
524 6 : mDefaultColor = MakeColorPref(colorStr);
525 : }
526 :
527 6 : colorStr = Preferences::GetString("browser.display.background_color");
528 :
529 6 : if (!colorStr.IsEmpty()) {
530 6 : mBackgroundColor = MakeColorPref(colorStr);
531 : }
532 : }
533 : else {
534 29 : mDefaultColor =
535 29 : LookAndFeel::GetColor(LookAndFeel::eColorID_WindowForeground,
536 : NS_RGB(0x00, 0x00, 0x00));
537 29 : mBackgroundColor =
538 29 : LookAndFeel::GetColor(LookAndFeel::eColorID_WindowBackground,
539 : NS_RGB(0xFF, 0xFF, 0xFF));
540 : }
541 :
542 : // Wherever we got the default background color from, ensure it is
543 : // opaque.
544 35 : mBackgroundColor = NS_ComposeColors(NS_RGB(0xFF, 0xFF, 0xFF),
545 : mBackgroundColor);
546 :
547 :
548 : // Now deal with the pref:
549 : // 0 = default: always, except in high contrast mode
550 : // 1 = always
551 : // 2 = never
552 35 : if (sDocumentColorsSetting == 1 || mDocument->IsBeingUsedAsImage()) {
553 21 : mUseDocumentColors = true;
554 14 : } else if (sDocumentColorsSetting == 2) {
555 0 : mUseDocumentColors = isChromeDocShell || mIsChromeOriginImage;
556 : } else {
557 14 : MOZ_ASSERT(!useAccessibilityTheme ||
558 : !(isChromeDocShell || mIsChromeOriginImage),
559 : "The accessibility theme should only be on for non-chrome");
560 14 : mUseDocumentColors = !useAccessibilityTheme;
561 : }
562 35 : }
563 :
564 : void
565 28 : nsPresContext::GetUserPreferences()
566 : {
567 28 : if (!GetPresShell()) {
568 : // No presshell means nothing to do here. We'll do this when we
569 : // get a presshell.
570 0 : return;
571 : }
572 :
573 28 : mAutoQualityMinFontSizePixelsPref =
574 28 : Preferences::GetInt("browser.display.auto_quality_min_font_size");
575 :
576 : // * document colors
577 28 : GetDocumentColorPreferences();
578 :
579 28 : mSendAfterPaintToContent =
580 28 : Preferences::GetBool("dom.send_after_paint_to_content",
581 28 : mSendAfterPaintToContent);
582 :
583 : // * link colors
584 28 : mUnderlineLinks =
585 28 : Preferences::GetBool("browser.underline_anchors", mUnderlineLinks);
586 :
587 56 : nsAdoptingString colorStr = Preferences::GetString("browser.anchor_color");
588 :
589 28 : if (!colorStr.IsEmpty()) {
590 28 : mLinkColor = MakeColorPref(colorStr);
591 : }
592 :
593 28 : colorStr = Preferences::GetString("browser.active_color");
594 :
595 28 : if (!colorStr.IsEmpty()) {
596 28 : mActiveLinkColor = MakeColorPref(colorStr);
597 : }
598 :
599 28 : colorStr = Preferences::GetString("browser.visited_color");
600 :
601 28 : if (!colorStr.IsEmpty()) {
602 28 : mVisitedLinkColor = MakeColorPref(colorStr);
603 : }
604 :
605 28 : mUseFocusColors =
606 28 : Preferences::GetBool("browser.display.use_focus_colors", mUseFocusColors);
607 :
608 28 : mFocusTextColor = mDefaultColor;
609 28 : mFocusBackgroundColor = mBackgroundColor;
610 :
611 28 : colorStr = Preferences::GetString("browser.display.focus_text_color");
612 :
613 28 : if (!colorStr.IsEmpty()) {
614 28 : mFocusTextColor = MakeColorPref(colorStr);
615 : }
616 :
617 28 : colorStr = Preferences::GetString("browser.display.focus_background_color");
618 :
619 28 : if (!colorStr.IsEmpty()) {
620 28 : mFocusBackgroundColor = MakeColorPref(colorStr);
621 : }
622 :
623 28 : mFocusRingWidth =
624 28 : Preferences::GetInt("browser.display.focus_ring_width", mFocusRingWidth);
625 :
626 28 : mFocusRingOnAnything =
627 28 : Preferences::GetBool("browser.display.focus_ring_on_anything",
628 28 : mFocusRingOnAnything);
629 :
630 28 : mFocusRingStyle =
631 28 : Preferences::GetInt("browser.display.focus_ring_style", mFocusRingStyle);
632 :
633 28 : mBodyTextColor = mDefaultColor;
634 :
635 : // * use fonts?
636 28 : mUseDocumentFonts =
637 28 : Preferences::GetInt("browser.display.use_document_fonts") != 0;
638 :
639 28 : mPrefScrollbarSide = Preferences::GetInt("layout.scrollbar.side");
640 :
641 28 : mLangGroupFontPrefs.Reset();
642 28 : mFontGroupCacheDirty = true;
643 28 : StaticPresData::Get()->ResetCachedFontPrefs();
644 :
645 : // * image animation
646 : const nsAdoptingCString& animatePref =
647 56 : Preferences::GetCString("image.animation_mode");
648 28 : if (animatePref.EqualsLiteral("normal"))
649 28 : mImageAnimationModePref = imgIContainer::kNormalAnimMode;
650 0 : else if (animatePref.EqualsLiteral("none"))
651 0 : mImageAnimationModePref = imgIContainer::kDontAnimMode;
652 0 : else if (animatePref.EqualsLiteral("once"))
653 0 : mImageAnimationModePref = imgIContainer::kLoopOnceAnimMode;
654 : else // dynamic change to invalid value should act like it does initially
655 0 : mImageAnimationModePref = imgIContainer::kNormalAnimMode;
656 :
657 28 : uint32_t bidiOptions = GetBidi();
658 :
659 : int32_t prefInt =
660 28 : Preferences::GetInt(IBMBIDI_TEXTDIRECTION_STR,
661 56 : GET_BIDI_OPTION_DIRECTION(bidiOptions));
662 28 : SET_BIDI_OPTION_DIRECTION(bidiOptions, prefInt);
663 28 : mPrefBidiDirection = prefInt;
664 :
665 : prefInt =
666 28 : Preferences::GetInt(IBMBIDI_TEXTTYPE_STR,
667 56 : GET_BIDI_OPTION_TEXTTYPE(bidiOptions));
668 28 : SET_BIDI_OPTION_TEXTTYPE(bidiOptions, prefInt);
669 :
670 : prefInt =
671 28 : Preferences::GetInt(IBMBIDI_NUMERAL_STR,
672 56 : GET_BIDI_OPTION_NUMERAL(bidiOptions));
673 28 : SET_BIDI_OPTION_NUMERAL(bidiOptions, prefInt);
674 :
675 : // We don't need to force reflow: either we are initializing a new
676 : // prescontext or we are being called from UpdateAfterPreferencesChanged()
677 : // which triggers a reflow anyway.
678 28 : SetBidi(bidiOptions, false);
679 : }
680 :
681 : void
682 1 : nsPresContext::InvalidatePaintedLayers()
683 : {
684 1 : if (!mShell)
685 0 : return;
686 1 : nsIFrame* rootFrame = mShell->FrameManager()->GetRootFrame();
687 1 : if (rootFrame) {
688 : // FrameLayerBuilder caches invalidation-related values that depend on the
689 : // appunits-per-dev-pixel ratio, so ensure that all PaintedLayer drawing
690 : // is completely flushed.
691 0 : rootFrame->InvalidateFrameSubtree();
692 : }
693 : }
694 :
695 : void
696 1 : nsPresContext::AppUnitsPerDevPixelChanged()
697 : {
698 1 : InvalidatePaintedLayers();
699 :
700 1 : if (mDeviceContext) {
701 1 : mDeviceContext->FlushFontCache();
702 : }
703 :
704 1 : if (HasCachedStyleData()) {
705 : // All cached style data must be recomputed.
706 0 : MediaFeatureValuesChanged(eRestyle_ForceDescendants, NS_STYLE_HINT_REFLOW);
707 : }
708 :
709 1 : mCurAppUnitsPerDevPixel = AppUnitsPerDevPixel();
710 1 : }
711 :
712 : void
713 0 : nsPresContext::PreferenceChanged(const char* aPrefName)
714 : {
715 0 : nsDependentCString prefName(aPrefName);
716 0 : if (prefName.EqualsLiteral("layout.css.dpi") ||
717 0 : prefName.EqualsLiteral("layout.css.devPixelsPerPx")) {
718 :
719 0 : int32_t oldAppUnitsPerDevPixel = AppUnitsPerDevPixel();
720 0 : if (mDeviceContext->CheckDPIChange() && mShell) {
721 0 : nsCOMPtr<nsIPresShell> shell = mShell;
722 : // Re-fetch the view manager's window dimensions in case there's a deferred
723 : // resize which hasn't affected our mVisibleArea yet
724 : nscoord oldWidthAppUnits, oldHeightAppUnits;
725 0 : RefPtr<nsViewManager> vm = shell->GetViewManager();
726 0 : if (!vm) {
727 0 : return;
728 : }
729 0 : vm->GetWindowDimensions(&oldWidthAppUnits, &oldHeightAppUnits);
730 0 : float oldWidthDevPixels = oldWidthAppUnits/oldAppUnitsPerDevPixel;
731 0 : float oldHeightDevPixels = oldHeightAppUnits/oldAppUnitsPerDevPixel;
732 :
733 0 : nscoord width = NSToCoordRound(oldWidthDevPixels*AppUnitsPerDevPixel());
734 0 : nscoord height = NSToCoordRound(oldHeightDevPixels*AppUnitsPerDevPixel());
735 0 : vm->SetWindowDimensions(width, height);
736 :
737 0 : AppUnitsPerDevPixelChanged();
738 : }
739 0 : return;
740 : }
741 0 : if (prefName.EqualsLiteral(GFX_MISSING_FONTS_NOTIFY_PREF)) {
742 0 : if (Preferences::GetBool(GFX_MISSING_FONTS_NOTIFY_PREF)) {
743 0 : if (!mMissingFonts) {
744 0 : mMissingFonts = new gfxMissingFontRecorder();
745 : // trigger reflow to detect missing fonts on the current page
746 0 : mPrefChangePendingNeedsReflow = true;
747 : }
748 : } else {
749 0 : if (mMissingFonts) {
750 0 : mMissingFonts->Clear();
751 : }
752 0 : mMissingFonts = nullptr;
753 : }
754 : }
755 0 : if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("font."))) {
756 : // Changes to font family preferences don't change anything in the
757 : // computed style data, so the style system won't generate a reflow
758 : // hint for us. We need to do that manually.
759 :
760 : // FIXME We could probably also handle changes to
761 : // browser.display.auto_quality_min_font_size here, but that
762 : // probably also requires clearing the text run cache, so don't
763 : // bother (yet, anyway).
764 0 : mPrefChangePendingNeedsReflow = true;
765 : }
766 0 : if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("bidi."))) {
767 : // Changes to bidi prefs need to trigger a reflow (see bug 443629)
768 0 : mPrefChangePendingNeedsReflow = true;
769 :
770 : // Changes to bidi.numeral also needs to empty the text run cache.
771 : // This is handled in gfxTextRunWordCache.cpp.
772 : }
773 0 : if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("gfx.font_rendering."))) {
774 : // Changes to font_rendering prefs need to trigger a reflow
775 0 : mPrefChangePendingNeedsReflow = true;
776 : }
777 : // we use a zero-delay timer to coalesce multiple pref updates
778 0 : if (!mPrefChangedTimer)
779 : {
780 : // We will end up calling InvalidatePreferenceSheets one from each pres
781 : // context, but all it's doing is clearing its cached sheet pointers,
782 : // so it won't be wastefully recreating the sheet multiple times.
783 : // The first pres context that has its mPrefChangedTimer called will
784 : // be the one to cause the reconstruction of the pref style sheet.
785 0 : nsLayoutStylesheetCache::InvalidatePreferenceSheets();
786 0 : mPrefChangedTimer = CreateTimer(PrefChangedUpdateTimerCallback,
787 0 : "PrefChangedUpdateTimerCallback", 0);
788 0 : if (!mPrefChangedTimer) {
789 0 : return;
790 : }
791 : }
792 0 : if (prefName.EqualsLiteral("nglayout.debug.paint_flashing") ||
793 0 : prefName.EqualsLiteral("nglayout.debug.paint_flashing_chrome")) {
794 0 : mPaintFlashingInitialized = false;
795 0 : return;
796 : }
797 : }
798 :
799 : void
800 0 : nsPresContext::UpdateAfterPreferencesChanged()
801 : {
802 0 : mPrefChangedTimer = nullptr;
803 :
804 0 : if (!mContainer) {
805 : // Delay updating until there is a container
806 0 : mNeedsPrefUpdate = true;
807 0 : return;
808 : }
809 :
810 0 : nsCOMPtr<nsIDocShellTreeItem> docShell(mContainer);
811 0 : if (docShell && nsIDocShellTreeItem::typeChrome == docShell->ItemType()) {
812 0 : return;
813 : }
814 :
815 : // Initialize our state from the user preferences
816 0 : GetUserPreferences();
817 :
818 : // update the presShell: tell it to set the preference style rules up
819 0 : if (mShell) {
820 0 : mShell->UpdatePreferenceStyles();
821 : }
822 :
823 0 : InvalidatePaintedLayers();
824 0 : mDeviceContext->FlushFontCache();
825 :
826 0 : nsChangeHint hint = nsChangeHint(0);
827 :
828 0 : if (mPrefChangePendingNeedsReflow) {
829 0 : hint |= NS_STYLE_HINT_REFLOW;
830 : }
831 :
832 : // Preferences require rerunning selector matching because we rebuild
833 : // the pref style sheet for some preference changes.
834 0 : RebuildAllStyleData(hint, eRestyle_Subtree);
835 : }
836 :
837 : nsresult
838 28 : nsPresContext::Init(nsDeviceContext* aDeviceContext)
839 : {
840 28 : NS_ASSERTION(!mInitialized, "attempt to reinit pres context");
841 28 : NS_ENSURE_ARG(aDeviceContext);
842 :
843 28 : mDeviceContext = aDeviceContext;
844 :
845 : // In certain rare cases (such as changing page mode), we tear down layout
846 : // state and re-initialize a new prescontext for a document. Given that we
847 : // hang style state off the DOM, we detect that re-initialization case and
848 : // lazily drop the servo data. We don't do this eagerly during layout teardown
849 : // because that would incur an extra whole-tree traversal that's unnecessary
850 : // most of the time.
851 28 : if (mDocument->IsStyledByServo()) {
852 0 : Element* root = mDocument->GetRootElement();
853 0 : if (root && root->HasServoData()) {
854 0 : ServoRestyleManager::ClearServoDataFromSubtree(root);
855 : }
856 : }
857 :
858 28 : if (mDeviceContext->SetFullZoom(mFullZoom))
859 0 : mDeviceContext->FlushFontCache();
860 28 : mCurAppUnitsPerDevPixel = AppUnitsPerDevPixel();
861 :
862 28 : mEventManager = new mozilla::EventStateManager();
863 :
864 28 : mEffectCompositor = new mozilla::EffectCompositor(this);
865 28 : mTransitionManager = new nsTransitionManager(this);
866 28 : mAnimationManager = new nsAnimationManager(this);
867 :
868 28 : if (mDocument->GetDisplayDocument()) {
869 0 : NS_ASSERTION(mDocument->GetDisplayDocument()->GetShell() &&
870 : mDocument->GetDisplayDocument()->GetShell()->GetPresContext(),
871 : "Why are we being initialized?");
872 : mRefreshDriver = mDocument->GetDisplayDocument()->GetShell()->
873 0 : GetPresContext()->RefreshDriver();
874 : } else {
875 28 : nsIDocument* parent = mDocument->GetParentDocument();
876 : // Unfortunately, sometimes |parent| here has no presshell because
877 : // printing screws up things. Assert that in other cases it does,
878 : // but whenever the shell is null just fall back on using our own
879 : // refresh driver.
880 28 : NS_ASSERTION(!parent || mDocument->IsStaticDocument() || parent->GetShell(),
881 : "How did we end up with a presshell if our parent doesn't "
882 : "have one?");
883 28 : if (parent && parent->GetShell()) {
884 1 : NS_ASSERTION(parent->GetShell()->GetPresContext(),
885 : "How did we get a presshell?");
886 :
887 : // We don't have our container set yet at this point
888 2 : nsCOMPtr<nsIDocShellTreeItem> ourItem = mDocument->GetDocShell();
889 1 : if (ourItem) {
890 2 : nsCOMPtr<nsIDocShellTreeItem> parentItem;
891 1 : ourItem->GetSameTypeParent(getter_AddRefs(parentItem));
892 1 : if (parentItem) {
893 : Element* containingElement =
894 0 : parent->FindContentForSubDocument(mDocument);
895 0 : if (!containingElement->IsXULElement() ||
896 0 : !containingElement->
897 0 : HasAttr(kNameSpaceID_None,
898 : nsGkAtoms::forceOwnRefreshDriver)) {
899 0 : mRefreshDriver = parent->GetShell()->GetPresContext()->RefreshDriver();
900 : }
901 : }
902 : }
903 : }
904 :
905 28 : if (!mRefreshDriver) {
906 28 : mRefreshDriver = new nsRefreshDriver(this);
907 : }
908 : }
909 :
910 28 : mLangService = nsLanguageAtomService::GetService();
911 :
912 : // Register callbacks so we're notified when the preferences change
913 : Preferences::RegisterPrefixCallback(nsPresContext::PrefChangedCallback,
914 : "font.",
915 28 : this);
916 : Preferences::RegisterPrefixCallback(nsPresContext::PrefChangedCallback,
917 : "browser.display.",
918 28 : this);
919 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
920 : "browser.underline_anchors",
921 28 : this);
922 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
923 : "browser.anchor_color",
924 28 : this);
925 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
926 : "browser.active_color",
927 28 : this);
928 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
929 : "browser.visited_color",
930 28 : this);
931 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
932 : "image.animation_mode",
933 28 : this);
934 : Preferences::RegisterPrefixCallback(nsPresContext::PrefChangedCallback,
935 : "bidi.",
936 28 : this);
937 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
938 : "dom.send_after_paint_to_content",
939 28 : this);
940 : Preferences::RegisterPrefixCallback(nsPresContext::PrefChangedCallback,
941 : "gfx.font_rendering.",
942 28 : this);
943 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
944 : "layout.css.dpi",
945 28 : this);
946 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
947 : "layout.css.devPixelsPerPx",
948 28 : this);
949 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
950 : "nglayout.debug.paint_flashing",
951 28 : this);
952 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
953 : "nglayout.debug.paint_flashing_chrome",
954 28 : this);
955 : Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
956 : kUseStandinsForNativeColors,
957 28 : this);
958 :
959 28 : nsresult rv = mEventManager->Init();
960 28 : NS_ENSURE_SUCCESS(rv, rv);
961 :
962 28 : mEventManager->SetPresContext(this);
963 :
964 : #ifdef RESTYLE_LOGGING
965 28 : mRestyleLoggingEnabled = GeckoRestyleManager::RestyleLoggingInitiallyEnabled();
966 : #endif
967 :
968 : #ifdef DEBUG
969 28 : mInitialized = true;
970 : #endif
971 :
972 28 : return NS_OK;
973 : }
974 :
975 : // Note: We don't hold a reference on the shell; it has a reference to
976 : // us
977 : void
978 28 : nsPresContext::AttachShell(nsIPresShell* aShell, StyleBackendType aBackendType)
979 : {
980 28 : MOZ_ASSERT(!mShell);
981 28 : mShell = aShell;
982 :
983 28 : if (aBackendType == StyleBackendType::Servo) {
984 0 : mRestyleManager = new ServoRestyleManager(this);
985 : } else {
986 28 : mRestyleManager = new GeckoRestyleManager(this);
987 : }
988 :
989 : // Since CounterStyleManager is also the name of a method of
990 : // nsPresContext, it is necessary to prefix the class with the mozilla
991 : // namespace here.
992 28 : mCounterStyleManager = new mozilla::CounterStyleManager(this);
993 :
994 28 : nsIDocument *doc = mShell->GetDocument();
995 28 : NS_ASSERTION(doc, "expect document here");
996 28 : if (doc) {
997 : // Have to update PresContext's mDocument before calling any other methods.
998 28 : mDocument = doc;
999 : }
1000 : // Initialize our state from the user preferences, now that we
1001 : // have a presshell, and hence a document.
1002 28 : GetUserPreferences();
1003 :
1004 28 : if (doc) {
1005 28 : nsIURI *docURI = doc->GetDocumentURI();
1006 :
1007 28 : if (IsDynamic() && docURI) {
1008 28 : bool isChrome = false;
1009 28 : bool isRes = false;
1010 28 : docURI->SchemeIs("chrome", &isChrome);
1011 28 : docURI->SchemeIs("resource", &isRes);
1012 :
1013 28 : if (!isChrome && !isRes)
1014 5 : mImageAnimationMode = mImageAnimationModePref;
1015 : else
1016 23 : mImageAnimationMode = imgIContainer::kNormalAnimMode;
1017 : }
1018 :
1019 28 : doc->AddCharSetObserver(this);
1020 28 : UpdateCharSet(doc->GetDocumentCharacterSet());
1021 : }
1022 28 : }
1023 :
1024 : void
1025 4 : nsPresContext::DetachShell()
1026 : {
1027 : // Remove ourselves as the charset observer from the shell's doc, because
1028 : // this shell may be going away for good.
1029 4 : nsIDocument *doc = mShell ? mShell->GetDocument() : nullptr;
1030 4 : if (doc) {
1031 4 : doc->RemoveCharSetObserver(this);
1032 : }
1033 :
1034 : // The counter style manager's destructor needs to deallocate with the
1035 : // presshell arena. Disconnect it before nulling out the shell.
1036 : //
1037 : // XXXbholley: Given recent refactorings, it probably makes more sense to
1038 : // just null our mShell at the bottom of this function. I'm leaving it
1039 : // this way to preserve the old ordering, but I doubt anything would break.
1040 4 : if (mCounterStyleManager) {
1041 4 : mCounterStyleManager->Disconnect();
1042 4 : mCounterStyleManager = nullptr;
1043 : }
1044 :
1045 4 : mShell = nullptr;
1046 :
1047 4 : if (mEffectCompositor) {
1048 4 : mEffectCompositor->Disconnect();
1049 4 : mEffectCompositor = nullptr;
1050 : }
1051 4 : if (mTransitionManager) {
1052 4 : mTransitionManager->Disconnect();
1053 4 : mTransitionManager = nullptr;
1054 : }
1055 4 : if (mAnimationManager) {
1056 4 : mAnimationManager->Disconnect();
1057 4 : mAnimationManager = nullptr;
1058 : }
1059 4 : if (mRestyleManager) {
1060 4 : mRestyleManager->Disconnect();
1061 4 : mRestyleManager = nullptr;
1062 : }
1063 4 : if (mRefreshDriver && mRefreshDriver->GetPresContext() == this) {
1064 4 : mRefreshDriver->Disconnect();
1065 : // Can't null out the refresh driver here.
1066 : }
1067 :
1068 4 : if (IsRoot()) {
1069 3 : nsRootPresContext* thisRoot = static_cast<nsRootPresContext*>(this);
1070 :
1071 : // Have to cancel our plugin geometry timer, because the
1072 : // callback for that depends on a non-null presshell.
1073 3 : thisRoot->CancelApplyPluginGeometryTimer();
1074 :
1075 : // The did-paint timer also depends on a non-null pres shell.
1076 3 : thisRoot->CancelAllDidPaintTimers();
1077 : }
1078 4 : }
1079 :
1080 : void
1081 2 : nsPresContext::DoChangeCharSet(NotNull<const Encoding*> aCharSet)
1082 : {
1083 2 : UpdateCharSet(aCharSet);
1084 2 : mDeviceContext->FlushFontCache();
1085 2 : RebuildAllStyleData(NS_STYLE_HINT_REFLOW, nsRestyleHint(0));
1086 2 : }
1087 :
1088 : void
1089 30 : nsPresContext::UpdateCharSet(NotNull<const Encoding*> aCharSet)
1090 : {
1091 30 : mLanguage = mLangService->LookupCharSet(aCharSet);
1092 : // this will be a language group (or script) code rather than a true language code
1093 :
1094 : // bug 39570: moved from nsLanguageAtomService::LookupCharSet()
1095 30 : if (mLanguage == nsGkAtoms::Unicode) {
1096 28 : mLanguage = mLangService->GetLocaleLanguage();
1097 : }
1098 30 : mLangGroupFontPrefs.Reset();
1099 30 : mFontGroupCacheDirty = true;
1100 :
1101 30 : switch (GET_BIDI_OPTION_TEXTTYPE(GetBidi())) {
1102 :
1103 : case IBMBIDI_TEXTTYPE_LOGICAL:
1104 0 : SetVisualMode(false);
1105 0 : break;
1106 :
1107 : case IBMBIDI_TEXTTYPE_VISUAL:
1108 0 : SetVisualMode(true);
1109 0 : break;
1110 :
1111 : case IBMBIDI_TEXTTYPE_CHARSET:
1112 : default:
1113 30 : SetVisualMode(IsVisualCharset(aCharSet));
1114 : }
1115 30 : }
1116 :
1117 : NS_IMETHODIMP
1118 2 : nsPresContext::Observe(nsISupports* aSubject,
1119 : const char* aTopic,
1120 : const char16_t* aData)
1121 : {
1122 2 : if (!nsCRT::strcmp(aTopic, "charset")) {
1123 2 : auto encoding = Encoding::ForName(NS_LossyConvertUTF16toASCII(aData));
1124 : RefPtr<CharSetChangingRunnable> runnable =
1125 6 : new CharSetChangingRunnable(this, encoding);
1126 6 : return Document()->Dispatch("CharSetChangingRunnable",
1127 : TaskCategory::Other,
1128 6 : runnable.forget());
1129 : }
1130 :
1131 0 : NS_WARNING("unrecognized topic in nsPresContext::Observe");
1132 0 : return NS_ERROR_FAILURE;
1133 : }
1134 :
1135 : nsPresContext*
1136 16446 : nsPresContext::GetParentPresContext()
1137 : {
1138 16446 : nsIPresShell* shell = GetPresShell();
1139 16446 : if (shell) {
1140 16446 : nsViewManager* viewManager = shell->GetViewManager();
1141 16446 : if (viewManager) {
1142 16446 : nsView* view = viewManager->GetRootView();
1143 16446 : if (view) {
1144 16446 : view = view->GetParent(); // anonymous inner view
1145 16446 : if (view) {
1146 0 : view = view->GetParent(); // subdocumentframe's view
1147 0 : if (view) {
1148 0 : nsIFrame* f = view->GetFrame();
1149 0 : if (f) {
1150 0 : return f->PresContext();
1151 : }
1152 : }
1153 : }
1154 : }
1155 : }
1156 : }
1157 16446 : return nullptr;
1158 : }
1159 :
1160 : nsPresContext*
1161 96 : nsPresContext::GetToplevelContentDocumentPresContext()
1162 : {
1163 96 : if (IsChrome())
1164 83 : return nullptr;
1165 13 : nsPresContext* pc = this;
1166 : for (;;) {
1167 13 : nsPresContext* parent = pc->GetParentPresContext();
1168 13 : if (!parent || parent->IsChrome())
1169 13 : return pc;
1170 0 : pc = parent;
1171 0 : }
1172 : }
1173 :
1174 : nsIWidget*
1175 0 : nsPresContext::GetNearestWidget(nsPoint* aOffset)
1176 : {
1177 0 : NS_ENSURE_TRUE(mShell, nullptr);
1178 0 : nsIFrame* frame = mShell->GetRootFrame();
1179 0 : NS_ENSURE_TRUE(frame, nullptr);
1180 0 : return frame->GetView()->GetNearestWidget(aOffset);
1181 : }
1182 :
1183 : nsIWidget*
1184 268 : nsPresContext::GetRootWidget()
1185 : {
1186 268 : NS_ENSURE_TRUE(mShell, nullptr);
1187 268 : nsViewManager* vm = mShell->GetViewManager();
1188 268 : if (!vm) {
1189 0 : return nullptr;
1190 : }
1191 536 : nsCOMPtr<nsIWidget> widget;
1192 268 : vm->GetRootWidget(getter_AddRefs(widget));
1193 268 : return widget.get();
1194 : }
1195 :
1196 : // We may want to replace this with something faster, maybe caching the root prescontext
1197 : nsRootPresContext*
1198 16204 : nsPresContext::GetRootPresContext()
1199 : {
1200 16204 : nsPresContext* pc = this;
1201 : for (;;) {
1202 16204 : nsPresContext* parent = pc->GetParentPresContext();
1203 16204 : if (!parent)
1204 16204 : break;
1205 0 : pc = parent;
1206 0 : }
1207 16204 : return pc->IsRoot() ? static_cast<nsRootPresContext*>(pc) : nullptr;
1208 : }
1209 :
1210 : void
1211 30 : nsPresContext::CompatibilityModeChanged()
1212 : {
1213 30 : if (!mShell) {
1214 24 : return;
1215 : }
1216 :
1217 30 : nsIDocument* doc = mShell->GetDocument();
1218 30 : if (!doc) {
1219 0 : return;
1220 : }
1221 :
1222 30 : StyleSetHandle styleSet = mShell->StyleSet();
1223 30 : if (styleSet->IsServo()) {
1224 0 : styleSet->AsServo()->CompatibilityModeChanged();
1225 : }
1226 :
1227 30 : if (doc->IsSVGDocument()) {
1228 : // SVG documents never load quirk.css.
1229 21 : return;
1230 : }
1231 :
1232 9 : bool needsQuirkSheet = CompatibilityMode() == eCompatibility_NavQuirks;
1233 9 : if (mQuirkSheetAdded == needsQuirkSheet) {
1234 3 : return;
1235 : }
1236 :
1237 6 : auto cache = nsLayoutStylesheetCache::For(styleSet->BackendType());
1238 6 : StyleSheet* sheet = cache->QuirkSheet();
1239 :
1240 6 : if (needsQuirkSheet) {
1241 : // quirk.css needs to come after html.css; we just keep it at the end.
1242 : DebugOnly<nsresult> rv =
1243 12 : styleSet->AppendStyleSheet(SheetType::Agent, sheet);
1244 6 : NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "failed to insert quirk.css");
1245 : } else {
1246 : DebugOnly<nsresult> rv =
1247 0 : styleSet->RemoveStyleSheet(SheetType::Agent, sheet);
1248 0 : NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "failed to remove quirk.css");
1249 : }
1250 :
1251 6 : mQuirkSheetAdded = needsQuirkSheet;
1252 : }
1253 :
1254 : // Helper function for setting Anim Mode on image
1255 0 : static void SetImgAnimModeOnImgReq(imgIRequest* aImgReq, uint16_t aMode)
1256 : {
1257 0 : if (aImgReq) {
1258 0 : nsCOMPtr<imgIContainer> imgCon;
1259 0 : aImgReq->GetImage(getter_AddRefs(imgCon));
1260 0 : if (imgCon) {
1261 0 : imgCon->SetAnimationMode(aMode);
1262 : }
1263 : }
1264 0 : }
1265 :
1266 : // IMPORTANT: Assumption is that all images for a Presentation
1267 : // have the same Animation Mode (pavlov said this was OK)
1268 : //
1269 : // Walks content and set the animation mode
1270 : // this is a way to turn on/off image animations
1271 0 : void nsPresContext::SetImgAnimations(nsIContent *aParent, uint16_t aMode)
1272 : {
1273 0 : nsCOMPtr<nsIImageLoadingContent> imgContent(do_QueryInterface(aParent));
1274 0 : if (imgContent) {
1275 0 : nsCOMPtr<imgIRequest> imgReq;
1276 0 : imgContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
1277 0 : getter_AddRefs(imgReq));
1278 0 : SetImgAnimModeOnImgReq(imgReq, aMode);
1279 : }
1280 :
1281 0 : uint32_t count = aParent->GetChildCount();
1282 0 : for (uint32_t i = 0; i < count; ++i) {
1283 0 : SetImgAnimations(aParent->GetChildAt(i), aMode);
1284 : }
1285 0 : }
1286 :
1287 : void
1288 0 : nsPresContext::SetSMILAnimations(nsIDocument *aDoc, uint16_t aNewMode,
1289 : uint16_t aOldMode)
1290 : {
1291 0 : if (aDoc->HasAnimationController()) {
1292 0 : nsSMILAnimationController* controller = aDoc->GetAnimationController();
1293 0 : switch (aNewMode)
1294 : {
1295 : case imgIContainer::kNormalAnimMode:
1296 : case imgIContainer::kLoopOnceAnimMode:
1297 0 : if (aOldMode == imgIContainer::kDontAnimMode)
1298 0 : controller->Resume(nsSMILTimeContainer::PAUSE_USERPREF);
1299 0 : break;
1300 :
1301 : case imgIContainer::kDontAnimMode:
1302 0 : if (aOldMode != imgIContainer::kDontAnimMode)
1303 0 : controller->Pause(nsSMILTimeContainer::PAUSE_USERPREF);
1304 0 : break;
1305 : }
1306 : }
1307 0 : }
1308 :
1309 : void
1310 0 : nsPresContext::SetImageAnimationModeInternal(uint16_t aMode)
1311 : {
1312 0 : NS_ASSERTION(aMode == imgIContainer::kNormalAnimMode ||
1313 : aMode == imgIContainer::kDontAnimMode ||
1314 : aMode == imgIContainer::kLoopOnceAnimMode, "Wrong Animation Mode is being set!");
1315 :
1316 : // Image animation mode cannot be changed when rendering to a printer.
1317 0 : if (!IsDynamic())
1318 0 : return;
1319 :
1320 : // Now walk the content tree and set the animation mode
1321 : // on all the images.
1322 0 : if (mShell != nullptr) {
1323 0 : nsIDocument *doc = mShell->GetDocument();
1324 0 : if (doc) {
1325 0 : doc->StyleImageLoader()->SetAnimationMode(aMode);
1326 :
1327 0 : Element *rootElement = doc->GetRootElement();
1328 0 : if (rootElement) {
1329 0 : SetImgAnimations(rootElement, aMode);
1330 : }
1331 0 : SetSMILAnimations(doc, aMode, mImageAnimationMode);
1332 : }
1333 : }
1334 :
1335 0 : mImageAnimationMode = aMode;
1336 : }
1337 :
1338 : void
1339 0 : nsPresContext::SetImageAnimationModeExternal(uint16_t aMode)
1340 : {
1341 0 : SetImageAnimationModeInternal(aMode);
1342 0 : }
1343 :
1344 : already_AddRefed<nsIAtom>
1345 128 : nsPresContext::GetContentLanguage() const
1346 : {
1347 256 : nsAutoString language;
1348 128 : Document()->GetContentLanguage(language);
1349 128 : language.StripWhitespace();
1350 :
1351 : // Content-Language may be a comma-separated list of language codes,
1352 : // in which case the HTML5 spec says to treat it as unknown
1353 128 : if (!language.IsEmpty() &&
1354 0 : !language.Contains(char16_t(','))) {
1355 0 : return NS_Atomize(language);
1356 : // NOTE: This does *not* count as an explicit language; in other
1357 : // words, it doesn't trigger language-specific hyphenation.
1358 : }
1359 128 : return nullptr;
1360 : }
1361 :
1362 : void
1363 0 : nsPresContext::UpdateEffectiveTextZoom()
1364 : {
1365 0 : float newZoom = mSystemFontScale * mTextZoom;
1366 0 : float minZoom = nsLayoutUtils::MinZoom();
1367 0 : float maxZoom = nsLayoutUtils::MaxZoom();
1368 :
1369 0 : if (newZoom < minZoom) {
1370 0 : newZoom = minZoom;
1371 0 : } else if (newZoom > maxZoom) {
1372 0 : newZoom = maxZoom;
1373 : }
1374 :
1375 0 : mEffectiveTextZoom = newZoom;
1376 :
1377 0 : if (HasCachedStyleData()) {
1378 : // Media queries could have changed, since we changed the meaning
1379 : // of 'em' units in them.
1380 0 : MediaFeatureValuesChanged(eRestyle_ForceDescendants,
1381 0 : NS_STYLE_HINT_REFLOW);
1382 : }
1383 0 : }
1384 :
1385 : void
1386 33 : nsPresContext::SetFullZoom(float aZoom)
1387 : {
1388 33 : if (!mShell || mFullZoom == aZoom) {
1389 33 : return;
1390 : }
1391 :
1392 : // Re-fetch the view manager's window dimensions in case there's a deferred
1393 : // resize which hasn't affected our mVisibleArea yet
1394 : nscoord oldWidthAppUnits, oldHeightAppUnits;
1395 0 : mShell->GetViewManager()->GetWindowDimensions(&oldWidthAppUnits, &oldHeightAppUnits);
1396 0 : float oldWidthDevPixels = oldWidthAppUnits / float(mCurAppUnitsPerDevPixel);
1397 0 : float oldHeightDevPixels = oldHeightAppUnits / float(mCurAppUnitsPerDevPixel);
1398 0 : mDeviceContext->SetFullZoom(aZoom);
1399 :
1400 0 : NS_ASSERTION(!mSuppressResizeReflow, "two zooms happening at the same time? impossible!");
1401 0 : mSuppressResizeReflow = true;
1402 :
1403 0 : mFullZoom = aZoom;
1404 0 : mShell->GetViewManager()->
1405 0 : SetWindowDimensions(NSToCoordRound(oldWidthDevPixels * AppUnitsPerDevPixel()),
1406 0 : NSToCoordRound(oldHeightDevPixels * AppUnitsPerDevPixel()));
1407 :
1408 0 : AppUnitsPerDevPixelChanged();
1409 :
1410 0 : mSuppressResizeReflow = false;
1411 : }
1412 :
1413 : void
1414 31 : nsPresContext::SetOverrideDPPX(float aDPPX)
1415 : {
1416 31 : mOverrideDPPX = aDPPX;
1417 :
1418 31 : if (HasCachedStyleData()) {
1419 0 : MediaFeatureValuesChanged(nsRestyleHint(0), nsChangeHint(0));
1420 : }
1421 31 : }
1422 :
1423 : gfxSize
1424 0 : nsPresContext::ScreenSizeInchesForFontInflation(bool* aChanged)
1425 : {
1426 0 : if (aChanged) {
1427 0 : *aChanged = false;
1428 : }
1429 :
1430 0 : nsDeviceContext *dx = DeviceContext();
1431 0 : nsRect clientRect;
1432 0 : dx->GetClientRect(clientRect); // FIXME: GetClientRect looks expensive
1433 0 : float unitsPerInch = dx->AppUnitsPerPhysicalInch();
1434 0 : gfxSize deviceSizeInches(float(clientRect.width) / unitsPerInch,
1435 0 : float(clientRect.height) / unitsPerInch);
1436 :
1437 0 : if (mLastFontInflationScreenSize == gfxSize(-1.0, -1.0)) {
1438 0 : mLastFontInflationScreenSize = deviceSizeInches;
1439 : }
1440 :
1441 0 : if (deviceSizeInches != mLastFontInflationScreenSize && aChanged) {
1442 0 : *aChanged = true;
1443 0 : mLastFontInflationScreenSize = deviceSizeInches;
1444 : }
1445 :
1446 0 : return deviceSizeInches;
1447 : }
1448 :
1449 : static bool
1450 30 : CheckOverflow(const nsStyleDisplay* aDisplay, ScrollbarStyles* aStyles)
1451 : {
1452 120 : if (aDisplay->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE &&
1453 58 : aDisplay->mScrollBehavior == NS_STYLE_SCROLL_BEHAVIOR_AUTO &&
1454 58 : aDisplay->mScrollSnapTypeX == NS_STYLE_SCROLL_SNAP_TYPE_NONE &&
1455 87 : aDisplay->mScrollSnapTypeY == NS_STYLE_SCROLL_SNAP_TYPE_NONE &&
1456 175 : aDisplay->mScrollSnapPointsX == nsStyleCoord(eStyleUnit_None) &&
1457 117 : aDisplay->mScrollSnapPointsY == nsStyleCoord(eStyleUnit_None) &&
1458 58 : !aDisplay->mScrollSnapDestination.mXPosition.mHasPercent &&
1459 58 : !aDisplay->mScrollSnapDestination.mYPosition.mHasPercent &&
1460 118 : aDisplay->mScrollSnapDestination.mXPosition.mLength == 0 &&
1461 29 : aDisplay->mScrollSnapDestination.mYPosition.mLength == 0) {
1462 29 : return false;
1463 : }
1464 :
1465 1 : if (aDisplay->mOverflowX == NS_STYLE_OVERFLOW_CLIP) {
1466 2 : *aStyles = ScrollbarStyles(NS_STYLE_OVERFLOW_HIDDEN,
1467 1 : NS_STYLE_OVERFLOW_HIDDEN, aDisplay);
1468 : } else {
1469 0 : *aStyles = ScrollbarStyles(aDisplay);
1470 : }
1471 1 : return true;
1472 : }
1473 :
1474 : static nsIContent*
1475 26 : GetPropagatedScrollbarStylesForViewport(nsPresContext* aPresContext,
1476 : ScrollbarStyles *aStyles)
1477 : {
1478 26 : nsIDocument* document = aPresContext->Document();
1479 26 : Element* docElement = document->GetRootElement();
1480 :
1481 : // docElement might be null if we're doing this after removing it.
1482 26 : if (!docElement) {
1483 0 : return nullptr;
1484 : }
1485 :
1486 : // Check the style on the document root element
1487 26 : StyleSetHandle styleSet = aPresContext->StyleSet();
1488 : RefPtr<nsStyleContext> rootStyle =
1489 52 : styleSet->ResolveStyleFor(docElement, nullptr, LazyComputeBehavior::Allow);
1490 26 : if (CheckOverflow(rootStyle->StyleDisplay(), aStyles)) {
1491 : // tell caller we stole the overflow style from the root element
1492 1 : return docElement;
1493 : }
1494 :
1495 : // Don't look in the BODY for non-HTML documents or HTML documents
1496 : // with non-HTML roots
1497 : // XXX this should be earlier; we shouldn't even look at the document root
1498 : // for non-HTML documents. Fix this once we support explicit CSS styling
1499 : // of the viewport
1500 : // XXX what about XHTML?
1501 50 : nsCOMPtr<nsIDOMHTMLDocument> htmlDoc(do_QueryInterface(document));
1502 25 : if (!htmlDoc || !docElement->IsHTMLElement()) {
1503 21 : return nullptr;
1504 : }
1505 :
1506 8 : nsCOMPtr<nsIDOMHTMLElement> body;
1507 4 : htmlDoc->GetBody(getter_AddRefs(body));
1508 8 : nsCOMPtr<nsIContent> bodyElement = do_QueryInterface(body);
1509 :
1510 8 : if (!bodyElement ||
1511 4 : !bodyElement->NodeInfo()->Equals(nsGkAtoms::body)) {
1512 : // The body is not a <body> tag, it's a <frameset>.
1513 0 : return nullptr;
1514 : }
1515 :
1516 : RefPtr<nsStyleContext> bodyStyle =
1517 8 : styleSet->ResolveStyleFor(bodyElement->AsElement(), rootStyle,
1518 8 : LazyComputeBehavior::Allow);
1519 :
1520 4 : if (CheckOverflow(bodyStyle->StyleDisplay(), aStyles)) {
1521 : // tell caller we stole the overflow style from the body element
1522 0 : return bodyElement;
1523 : }
1524 :
1525 4 : return nullptr;
1526 : }
1527 :
1528 : nsIContent*
1529 26 : nsPresContext::UpdateViewportScrollbarStylesOverride()
1530 : {
1531 : // Start off with our default styles, and then update them as needed.
1532 52 : mViewportStyleScrollbar = ScrollbarStyles(NS_STYLE_OVERFLOW_AUTO,
1533 26 : NS_STYLE_OVERFLOW_AUTO);
1534 26 : mViewportScrollbarOverrideNode = nullptr;
1535 : // Don't propagate the scrollbar state in printing or print preview.
1536 26 : if (!IsPaginated()) {
1537 26 : mViewportScrollbarOverrideNode =
1538 26 : GetPropagatedScrollbarStylesForViewport(this, &mViewportStyleScrollbar);
1539 : }
1540 :
1541 26 : nsIDocument* document = Document();
1542 26 : if (Element* fullscreenElement = document->GetFullscreenElement()) {
1543 : // If the document is in fullscreen, but the fullscreen element is
1544 : // not the root element, we should explicitly suppress the scrollbar
1545 : // here. Note that, we still need to return the original element
1546 : // the styles are from, so that the state of those elements is not
1547 : // affected across fullscreen change.
1548 0 : if (fullscreenElement != document->GetRootElement() &&
1549 0 : fullscreenElement != mViewportScrollbarOverrideNode) {
1550 0 : mViewportStyleScrollbar = ScrollbarStyles(NS_STYLE_OVERFLOW_HIDDEN,
1551 0 : NS_STYLE_OVERFLOW_HIDDEN);
1552 : }
1553 : }
1554 26 : return mViewportScrollbarOverrideNode;
1555 : }
1556 :
1557 : bool
1558 0 : nsPresContext::ElementWouldPropagateScrollbarStyles(Element* aElement)
1559 : {
1560 0 : MOZ_ASSERT(IsPaginated(), "Should only be called on paginated contexts");
1561 0 : if (aElement->GetParent() && !aElement->IsHTMLElement(nsGkAtoms::body)) {
1562 : // We certainly won't be propagating from this element.
1563 0 : return false;
1564 : }
1565 :
1566 : // Go ahead and just call GetPropagatedScrollbarStylesForViewport, but update
1567 : // a dummy ScrollbarStyles we don't care about. It'll do a bit of extra work,
1568 : // but saves us having to have more complicated code or more code duplication;
1569 : // in practice we will make this call quite rarely, because we checked for all
1570 : // the common cases above.
1571 0 : ScrollbarStyles dummy(NS_STYLE_OVERFLOW_AUTO, NS_STYLE_OVERFLOW_AUTO);
1572 0 : return GetPropagatedScrollbarStylesForViewport(this, &dummy) == aElement;
1573 : }
1574 :
1575 : void
1576 11 : nsPresContext::SetContainer(nsIDocShell* aDocShell)
1577 : {
1578 11 : if (aDocShell) {
1579 7 : NS_ASSERTION(!(mContainer && mNeedsPrefUpdate),
1580 : "Should only need pref update if mContainer is null.");
1581 7 : mContainer = static_cast<nsDocShell*>(aDocShell);
1582 7 : if (mNeedsPrefUpdate) {
1583 0 : if (!mPrefChangedTimer) {
1584 0 : mPrefChangedTimer = CreateTimer(PrefChangedUpdateTimerCallback,
1585 0 : "PrefChangedUpdateTimerCallback", 0);
1586 : }
1587 0 : mNeedsPrefUpdate = false;
1588 : }
1589 : } else {
1590 4 : mContainer = WeakPtr<nsDocShell>();
1591 : }
1592 11 : UpdateIsChrome();
1593 11 : if (mContainer) {
1594 7 : GetDocumentColorPreferences();
1595 : }
1596 11 : }
1597 :
1598 : nsISupports*
1599 443 : nsPresContext::GetContainerWeakInternal() const
1600 : {
1601 443 : return static_cast<nsIDocShell*>(mContainer);
1602 : }
1603 :
1604 : nsISupports*
1605 0 : nsPresContext::GetContainerWeakExternal() const
1606 : {
1607 0 : return GetContainerWeakInternal();
1608 : }
1609 :
1610 : nsIDocShell*
1611 746 : nsPresContext::GetDocShell() const
1612 : {
1613 746 : return mContainer;
1614 : }
1615 :
1616 : /* virtual */ void
1617 4 : nsPresContext::Detach()
1618 : {
1619 4 : SetContainer(nullptr);
1620 4 : SetLinkHandler(nullptr);
1621 4 : }
1622 :
1623 : bool
1624 0 : nsPresContext::BidiEnabledExternal() const
1625 : {
1626 0 : return BidiEnabledInternal();
1627 : }
1628 :
1629 : bool
1630 386 : nsPresContext::BidiEnabledInternal() const
1631 : {
1632 386 : return Document()->GetBidiEnabled();
1633 : }
1634 :
1635 : void
1636 0 : nsPresContext::SetBidiEnabled() const
1637 : {
1638 0 : if (mShell) {
1639 0 : nsIDocument *doc = mShell->GetDocument();
1640 0 : if (doc) {
1641 0 : doc->SetBidiEnabled();
1642 : }
1643 : }
1644 0 : }
1645 :
1646 : void
1647 28 : nsPresContext::SetBidi(uint32_t aSource, bool aForceRestyle)
1648 : {
1649 : // Don't do all this stuff unless the options have changed.
1650 28 : if (aSource == GetBidi()) {
1651 28 : return;
1652 : }
1653 :
1654 0 : NS_ASSERTION(!(aForceRestyle && (GetBidi() == 0)),
1655 : "ForceReflow on new prescontext");
1656 :
1657 0 : Document()->SetBidiOptions(aSource);
1658 0 : if (IBMBIDI_TEXTDIRECTION_RTL == GET_BIDI_OPTION_DIRECTION(aSource)
1659 0 : || IBMBIDI_NUMERAL_HINDI == GET_BIDI_OPTION_NUMERAL(aSource)) {
1660 0 : SetBidiEnabled();
1661 : }
1662 0 : if (IBMBIDI_TEXTTYPE_VISUAL == GET_BIDI_OPTION_TEXTTYPE(aSource)) {
1663 0 : SetVisualMode(true);
1664 : }
1665 0 : else if (IBMBIDI_TEXTTYPE_LOGICAL == GET_BIDI_OPTION_TEXTTYPE(aSource)) {
1666 0 : SetVisualMode(false);
1667 : }
1668 : else {
1669 0 : nsIDocument* doc = mShell->GetDocument();
1670 0 : if (doc) {
1671 0 : SetVisualMode(IsVisualCharset(doc->GetDocumentCharacterSet()));
1672 : }
1673 : }
1674 0 : if (aForceRestyle && mShell) {
1675 : // Reconstruct the root document element's frame and its children,
1676 : // because we need to trigger frame reconstruction for direction change.
1677 0 : mDocument->RebuildUserFontSet();
1678 0 : mShell->ReconstructFrames();
1679 : }
1680 : }
1681 :
1682 : uint32_t
1683 357 : nsPresContext::GetBidi() const
1684 : {
1685 357 : return Document()->GetBidiOptions();
1686 : }
1687 :
1688 : bool
1689 2 : nsPresContext::IsTopLevelWindowInactive()
1690 : {
1691 4 : nsCOMPtr<nsIDocShellTreeItem> treeItem(mContainer);
1692 2 : if (!treeItem)
1693 0 : return false;
1694 :
1695 4 : nsCOMPtr<nsIDocShellTreeItem> rootItem;
1696 2 : treeItem->GetRootTreeItem(getter_AddRefs(rootItem));
1697 2 : if (!rootItem) {
1698 0 : return false;
1699 : }
1700 :
1701 4 : nsCOMPtr<nsPIDOMWindowOuter> domWindow = rootItem->GetWindow();
1702 :
1703 2 : return domWindow && !domWindow->IsActive();
1704 : }
1705 :
1706 : void
1707 4 : nsPresContext::RecordInteractionTime(InteractionType aType,
1708 : const TimeStamp& aTimeStamp)
1709 : {
1710 4 : if (!mInteractionTimeEnabled || aTimeStamp.IsNull()) {
1711 4 : return;
1712 : }
1713 :
1714 : // Array of references to the member variable of each time stamp
1715 : // for the different interaction types, keyed by InteractionType.
1716 : TimeStamp nsPresContext::*interactionTimes[] = {
1717 : &nsPresContext::mFirstClickTime,
1718 : &nsPresContext::mFirstKeyTime,
1719 : &nsPresContext::mFirstMouseMoveTime,
1720 : &nsPresContext::mFirstScrollTime
1721 4 : };
1722 :
1723 : // Array of histogram IDs for the different interaction types,
1724 : // keyed by InteractionType.
1725 : Telemetry::HistogramID histogramIds[] = {
1726 : Telemetry::TIME_TO_FIRST_CLICK_MS,
1727 : Telemetry::TIME_TO_FIRST_KEY_INPUT_MS,
1728 : Telemetry::TIME_TO_FIRST_MOUSE_MOVE_MS,
1729 : Telemetry::TIME_TO_FIRST_SCROLL_MS
1730 4 : };
1731 :
1732 : TimeStamp& interactionTime = this->*(
1733 4 : interactionTimes[static_cast<uint32_t>(aType)]);
1734 4 : if (!interactionTime.IsNull()) {
1735 : // We have already recorded an interaction time.
1736 3 : return;
1737 : }
1738 :
1739 : // Record the interaction time if it occurs after the first paint
1740 : // of the top level content document.
1741 : nsPresContext* topContentPresContext =
1742 1 : GetToplevelContentDocumentPresContext();
1743 :
1744 1 : if (!topContentPresContext) {
1745 : // There is no top content pres context so we don't care
1746 : // about the interaction time. Record a value anyways to avoid
1747 : // trying to find the top content pres context in future interactions.
1748 1 : interactionTime = TimeStamp::Now();
1749 1 : return;
1750 : }
1751 :
1752 0 : if (topContentPresContext->mFirstNonBlankPaintTime.IsNull() ||
1753 0 : topContentPresContext->mFirstNonBlankPaintTime > aTimeStamp) {
1754 : // Top content pres context has not had a non-blank paint yet
1755 : // or the event timestamp is before the first non-blank paint,
1756 : // so don't record interaction time.
1757 0 : return;
1758 : }
1759 :
1760 : // Check if we are recording the first of any of the interaction types.
1761 0 : bool isFirstInteraction = true;
1762 0 : for (TimeStamp nsPresContext::* memberPtr : interactionTimes) {
1763 0 : TimeStamp& timeStamp = this->*(memberPtr);
1764 0 : if (!timeStamp.IsNull()) {
1765 0 : isFirstInteraction = false;
1766 0 : break;
1767 : }
1768 : }
1769 :
1770 0 : interactionTime = TimeStamp::Now();
1771 : // Only the top level content pres context reports first interaction
1772 : // time to telemetry (if it hasn't already done so).
1773 0 : if (this == topContentPresContext) {
1774 0 : if (Telemetry::CanRecordExtended()) {
1775 : double millis =
1776 0 : (interactionTime - mFirstNonBlankPaintTime).ToMilliseconds();
1777 0 : Telemetry::Accumulate(histogramIds[static_cast<uint32_t>(aType)],
1778 0 : millis);
1779 :
1780 0 : if (isFirstInteraction) {
1781 0 : Telemetry::Accumulate(Telemetry::TIME_TO_FIRST_INTERACTION_MS, millis);
1782 : }
1783 : }
1784 : } else {
1785 0 : topContentPresContext->RecordInteractionTime(aType, aTimeStamp);
1786 : }
1787 : }
1788 :
1789 : nsITheme*
1790 1658 : nsPresContext::GetTheme()
1791 : {
1792 1658 : if (!sNoTheme && !mTheme) {
1793 3 : mTheme = do_GetService("@mozilla.org/chrome/chrome-native-theme;1");
1794 3 : if (!mTheme)
1795 0 : sNoTheme = true;
1796 : }
1797 :
1798 1658 : return mTheme;
1799 : }
1800 :
1801 : void
1802 0 : nsPresContext::ThemeChanged()
1803 : {
1804 0 : if (!mPendingThemeChanged) {
1805 0 : sLookAndFeelChanged = true;
1806 0 : sThemeChanged = true;
1807 :
1808 : nsCOMPtr<nsIRunnable> ev =
1809 0 : NewRunnableMethod("nsPresContext::ThemeChangedInternal",
1810 : this,
1811 0 : &nsPresContext::ThemeChangedInternal);
1812 0 : nsresult rv = Document()->Dispatch("nsPresContext::ThemeChangedInternal",
1813 : TaskCategory::Other,
1814 0 : ev.forget());
1815 0 : if (NS_SUCCEEDED(rv)) {
1816 0 : mPendingThemeChanged = true;
1817 : }
1818 : }
1819 0 : }
1820 :
1821 : static bool
1822 0 : NotifyThemeChanged(TabParent* aTabParent, void* aArg)
1823 : {
1824 0 : aTabParent->ThemeChanged();
1825 0 : return false;
1826 : }
1827 :
1828 : void
1829 0 : nsPresContext::ThemeChangedInternal()
1830 : {
1831 0 : mPendingThemeChanged = false;
1832 :
1833 : // Tell the theme that it changed, so it can flush any handles to stale theme
1834 : // data.
1835 0 : if (mTheme && sThemeChanged) {
1836 0 : mTheme->ThemeChanged();
1837 0 : sThemeChanged = false;
1838 : }
1839 :
1840 0 : if (sLookAndFeelChanged) {
1841 : // Clear all cached LookAndFeel colors.
1842 0 : LookAndFeel::Refresh();
1843 0 : sLookAndFeelChanged = false;
1844 :
1845 : // Vector images (SVG) may be using theme colors so we discard all cached
1846 : // surfaces. (We could add a vector image only version of DiscardAll, but
1847 : // in bug 940625 we decided theme changes are rare enough not to bother.)
1848 0 : image::SurfaceCacheUtils::DiscardAll();
1849 : }
1850 :
1851 : // This will force the system metrics to be generated the next time they're used
1852 0 : nsCSSRuleProcessor::FreeSystemMetrics();
1853 :
1854 : // Changes to system metrics can change media queries on them, or
1855 : // :-moz-system-metric selectors (which requires eRestyle_Subtree).
1856 : // Changes in theme can change system colors (whose changes are
1857 : // properly reflected in computed style data), system fonts (whose
1858 : // changes are not), and -moz-appearance (whose changes likewise are
1859 : // not), so we need to reflow.
1860 0 : MediaFeatureValuesChanged(eRestyle_Subtree, NS_STYLE_HINT_REFLOW);
1861 :
1862 : // Recursively notify all remote leaf descendants that the
1863 : // system theme has changed.
1864 0 : nsContentUtils::CallOnAllRemoteChildren(mDocument->GetWindow(),
1865 0 : NotifyThemeChanged, nullptr);
1866 0 : }
1867 :
1868 : void
1869 0 : nsPresContext::SysColorChanged()
1870 : {
1871 0 : if (!mPendingSysColorChanged) {
1872 0 : sLookAndFeelChanged = true;
1873 : nsCOMPtr<nsIRunnable> ev =
1874 0 : NewRunnableMethod("nsPresContext::SysColorChangedInternal",
1875 : this,
1876 0 : &nsPresContext::SysColorChangedInternal);
1877 0 : nsresult rv = Document()->Dispatch("nsPresContext::SysColorChangedInternal",
1878 : TaskCategory::Other,
1879 0 : ev.forget());
1880 0 : if (NS_SUCCEEDED(rv)) {
1881 0 : mPendingSysColorChanged = true;
1882 : }
1883 : }
1884 0 : }
1885 :
1886 : void
1887 0 : nsPresContext::SysColorChangedInternal()
1888 : {
1889 0 : mPendingSysColorChanged = false;
1890 :
1891 0 : if (sLookAndFeelChanged) {
1892 : // Don't use the cached values for the system colors
1893 0 : LookAndFeel::Refresh();
1894 0 : sLookAndFeelChanged = false;
1895 : }
1896 :
1897 : // Invalidate cached '-moz-windows-accent-color-applies' media query:
1898 0 : nsCSSRuleProcessor::FreeSystemMetrics();
1899 :
1900 : // Reset default background and foreground colors for the document since
1901 : // they may be using system colors
1902 0 : GetDocumentColorPreferences();
1903 :
1904 : // The system color values are computed to colors in the style data,
1905 : // so normal style data comparison is sufficient here.
1906 0 : RebuildAllStyleData(nsChangeHint(0), nsRestyleHint(0));
1907 0 : }
1908 :
1909 : void
1910 1 : nsPresContext::UIResolutionChanged()
1911 : {
1912 1 : if (!mPendingUIResolutionChanged) {
1913 : nsCOMPtr<nsIRunnable> ev =
1914 2 : NewRunnableMethod("nsPresContext::UIResolutionChangedInternal",
1915 : this,
1916 2 : &nsPresContext::UIResolutionChangedInternal);
1917 : nsresult rv =
1918 1 : Document()->Dispatch("nsPresContext::UIResolutionChangedInternal",
1919 : TaskCategory::Other,
1920 1 : ev.forget());
1921 1 : if (NS_SUCCEEDED(rv)) {
1922 1 : mPendingUIResolutionChanged = true;
1923 : }
1924 : }
1925 1 : }
1926 :
1927 : void
1928 0 : nsPresContext::UIResolutionChangedSync()
1929 : {
1930 0 : if (!mPendingUIResolutionChanged) {
1931 0 : mPendingUIResolutionChanged = true;
1932 0 : UIResolutionChangedInternalScale(0.0);
1933 : }
1934 0 : }
1935 :
1936 : /*static*/ bool
1937 0 : nsPresContext::UIResolutionChangedSubdocumentCallback(nsIDocument* aDocument,
1938 : void* aData)
1939 : {
1940 0 : nsIPresShell* shell = aDocument->GetShell();
1941 0 : if (shell) {
1942 0 : nsPresContext* pc = shell->GetPresContext();
1943 0 : if (pc) {
1944 : // For subdocuments, we want to apply the parent's scale, because there
1945 : // are cases where the subdoc's device context is connected to a widget
1946 : // that has an out-of-date resolution (it's on a different screen, but
1947 : // currently hidden, and will not be updated until shown): bug 1249279.
1948 0 : double scale = *static_cast<double*>(aData);
1949 0 : pc->UIResolutionChangedInternalScale(scale);
1950 : }
1951 : }
1952 0 : return true;
1953 : }
1954 :
1955 : static void
1956 0 : NotifyTabUIResolutionChanged(TabParent* aTab, void *aArg)
1957 : {
1958 0 : aTab->UIResolutionChanged();
1959 0 : }
1960 :
1961 : static void
1962 1 : NotifyChildrenUIResolutionChanged(nsPIDOMWindowOuter* aWindow)
1963 : {
1964 2 : nsCOMPtr<nsIDocument> doc = aWindow->GetExtantDoc();
1965 2 : RefPtr<nsPIWindowRoot> topLevelWin = nsContentUtils::GetWindowRoot(doc);
1966 1 : if (!topLevelWin) {
1967 0 : return;
1968 : }
1969 1 : topLevelWin->EnumerateBrowsers(NotifyTabUIResolutionChanged, nullptr);
1970 : }
1971 :
1972 : void
1973 1 : nsPresContext::UIResolutionChangedInternal()
1974 : {
1975 1 : UIResolutionChangedInternalScale(0.0);
1976 1 : }
1977 :
1978 : void
1979 1 : nsPresContext::UIResolutionChangedInternalScale(double aScale)
1980 : {
1981 1 : mPendingUIResolutionChanged = false;
1982 :
1983 1 : mDeviceContext->CheckDPIChange(&aScale);
1984 1 : if (mCurAppUnitsPerDevPixel != AppUnitsPerDevPixel()) {
1985 1 : AppUnitsPerDevPixelChanged();
1986 : }
1987 :
1988 : // Recursively notify all remote leaf descendants of the change.
1989 1 : if (nsPIDOMWindowOuter* window = mDocument->GetWindow()) {
1990 1 : NotifyChildrenUIResolutionChanged(window);
1991 : }
1992 :
1993 1 : mDocument->EnumerateSubDocuments(UIResolutionChangedSubdocumentCallback,
1994 1 : &aScale);
1995 1 : }
1996 :
1997 : void
1998 0 : nsPresContext::EmulateMedium(const nsAString& aMediaType)
1999 : {
2000 0 : nsIAtom* previousMedium = Medium();
2001 0 : mIsEmulatingMedia = true;
2002 :
2003 0 : nsAutoString mediaType;
2004 0 : nsContentUtils::ASCIIToLower(aMediaType, mediaType);
2005 :
2006 0 : mMediaEmulated = NS_Atomize(mediaType);
2007 0 : if (mMediaEmulated != previousMedium && mShell) {
2008 0 : MediaFeatureValuesChanged(nsRestyleHint(0), nsChangeHint(0));
2009 : }
2010 0 : }
2011 :
2012 0 : void nsPresContext::StopEmulatingMedium()
2013 : {
2014 0 : nsIAtom* previousMedium = Medium();
2015 0 : mIsEmulatingMedia = false;
2016 0 : if (Medium() != previousMedium) {
2017 0 : MediaFeatureValuesChanged(nsRestyleHint(0), nsChangeHint(0));
2018 : }
2019 0 : }
2020 :
2021 : void
2022 0 : nsPresContext::ForceCacheLang(nsIAtom *aLanguage)
2023 : {
2024 : // force it to be cached
2025 0 : GetDefaultFont(kPresContext_DefaultVariableFont_ID, aLanguage);
2026 0 : mLanguagesUsed.PutEntry(aLanguage);
2027 0 : }
2028 :
2029 : void
2030 0 : nsPresContext::CacheAllLangs()
2031 : {
2032 0 : if (mFontGroupCacheDirty) {
2033 0 : nsCOMPtr<nsIAtom> thisLang = nsStyleFont::GetLanguage(this);
2034 0 : GetDefaultFont(kPresContext_DefaultVariableFont_ID, thisLang.get());
2035 0 : GetDefaultFont(kPresContext_DefaultVariableFont_ID, nsGkAtoms::x_math);
2036 : // https://bugzilla.mozilla.org/show_bug.cgi?id=1362599#c12
2037 0 : GetDefaultFont(kPresContext_DefaultVariableFont_ID, nsGkAtoms::Unicode);
2038 0 : for (auto iter = mLanguagesUsed.Iter(); !iter.Done(); iter.Next()) {
2039 :
2040 0 : GetDefaultFont(kPresContext_DefaultVariableFont_ID, iter.Get()->GetKey());
2041 : }
2042 : }
2043 0 : mFontGroupCacheDirty = false;
2044 0 : }
2045 :
2046 : void
2047 3 : nsPresContext::RebuildAllStyleData(nsChangeHint aExtraHint,
2048 : nsRestyleHint aRestyleHint)
2049 : {
2050 3 : if (!mShell) {
2051 : // We must have been torn down. Nothing to do here.
2052 0 : return;
2053 : }
2054 :
2055 3 : mUsesRootEMUnits = false;
2056 3 : mUsesExChUnits = false;
2057 3 : mUsesViewportUnits = false;
2058 3 : mDocument->RebuildUserFontSet();
2059 3 : RebuildCounterStyles();
2060 :
2061 3 : RestyleManager()->RebuildAllStyleData(aExtraHint, aRestyleHint);
2062 : }
2063 :
2064 : void
2065 0 : nsPresContext::PostRebuildAllStyleDataEvent(nsChangeHint aExtraHint,
2066 : nsRestyleHint aRestyleHint)
2067 : {
2068 0 : if (!mShell) {
2069 : // We must have been torn down. Nothing to do here.
2070 0 : return;
2071 : }
2072 0 : RestyleManager()->PostRebuildAllStyleDataEvent(aExtraHint, aRestyleHint);
2073 : }
2074 :
2075 : struct MediaFeatureHints
2076 : {
2077 : nsRestyleHint restyleHint;
2078 : nsChangeHint changeHint;
2079 : };
2080 :
2081 : static bool
2082 1 : MediaFeatureValuesChangedAllDocumentsCallback(nsIDocument* aDocument, void* aHints)
2083 : {
2084 1 : MediaFeatureHints* hints = static_cast<MediaFeatureHints*>(aHints);
2085 1 : if (nsIPresShell* shell = aDocument->GetShell()) {
2086 0 : if (nsPresContext* pc = shell->GetPresContext()) {
2087 0 : pc->MediaFeatureValuesChangedAllDocuments(hints->restyleHint,
2088 0 : hints->changeHint);
2089 : }
2090 : }
2091 1 : return true;
2092 : }
2093 :
2094 : void
2095 1 : nsPresContext::MediaFeatureValuesChangedAllDocuments(nsRestyleHint aRestyleHint,
2096 : nsChangeHint aChangeHint)
2097 : {
2098 1 : MediaFeatureValuesChanged(aRestyleHint, aChangeHint);
2099 : MediaFeatureHints hints = {
2100 : aRestyleHint,
2101 : aChangeHint
2102 1 : };
2103 :
2104 1 : mDocument->EnumerateSubDocuments(MediaFeatureValuesChangedAllDocumentsCallback,
2105 1 : &hints);
2106 1 : }
2107 :
2108 : void
2109 21 : nsPresContext::MediaFeatureValuesChanged(nsRestyleHint aRestyleHint,
2110 : nsChangeHint aChangeHint)
2111 : {
2112 21 : mPendingMediaFeatureValuesChanged = false;
2113 :
2114 : // MediumFeaturesChanged updates the applied rules, so it always gets called.
2115 21 : if (mShell && mShell->StyleSet()->MediumFeaturesChanged()) {
2116 1 : aRestyleHint |= eRestyle_Subtree;
2117 : }
2118 :
2119 41 : if (mPendingViewportChange &&
2120 61 : (mUsesViewportUnits || mDocument->IsStyledByServo())) {
2121 : // Rebuild all style data without rerunning selector matching.
2122 : //
2123 : // FIXME(emilio, bug 1328652): We don't set mUsesViewportUnits in stylo yet,
2124 : // so assume the worst.
2125 : //
2126 : // Also, in this case we don't need to do a rebuild of the style data, only
2127 : // post a restyle.
2128 0 : aRestyleHint |= eRestyle_ForceDescendants;
2129 : }
2130 :
2131 21 : if (aRestyleHint || aChangeHint) {
2132 1 : RebuildAllStyleData(aChangeHint, aRestyleHint);
2133 : }
2134 :
2135 21 : mPendingViewportChange = false;
2136 :
2137 21 : if (mDocument->IsBeingUsedAsImage()) {
2138 18 : MOZ_ASSERT(mDocument->MediaQueryLists().isEmpty());
2139 18 : return;
2140 : }
2141 :
2142 3 : mDocument->NotifyMediaFeatureValuesChanged();
2143 :
2144 3 : MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
2145 :
2146 : // Media query list listeners should be notified from a queued task
2147 : // (in HTML5 terms), although we also want to notify them on certain
2148 : // flushes. (We're already running off an event.)
2149 : //
2150 : // Note that we do this after the new style from media queries in
2151 : // style sheets has been computed.
2152 :
2153 3 : if (!mDocument->MediaQueryLists().isEmpty()) {
2154 : // We build a list of all the notifications we're going to send
2155 : // before we send any of them.
2156 10 : for (auto mql : mDocument->MediaQueryLists()) {
2157 14 : nsAutoMicroTask mt;
2158 7 : mql->MaybeNotify();
2159 : }
2160 : }
2161 : }
2162 :
2163 : void
2164 20 : nsPresContext::PostMediaFeatureValuesChangedEvent()
2165 : {
2166 : // FIXME: We should probably replace this event with use of
2167 : // nsRefreshDriver::AddStyleFlushObserver (except the pres shell would
2168 : // need to track whether it's been added).
2169 20 : if (!mPendingMediaFeatureValuesChanged && mShell) {
2170 : nsCOMPtr<nsIRunnable> ev =
2171 40 : NewRunnableMethod("nsPresContext::HandleMediaFeatureValuesChangedEvent",
2172 40 : this, &nsPresContext::HandleMediaFeatureValuesChangedEvent);
2173 : nsresult rv =
2174 20 : Document()->Dispatch("nsPresContext::HandleMediaFeatureValuesChangedEvent",
2175 : TaskCategory::Other,
2176 20 : ev.forget());
2177 20 : if (NS_SUCCEEDED(rv)) {
2178 20 : mPendingMediaFeatureValuesChanged = true;
2179 20 : mShell->SetNeedStyleFlush();
2180 : }
2181 : }
2182 20 : }
2183 :
2184 : void
2185 20 : nsPresContext::HandleMediaFeatureValuesChangedEvent()
2186 : {
2187 : // Null-check mShell in case the shell has been destroyed (and the
2188 : // event is the only thing holding the pres context alive).
2189 20 : if (mPendingMediaFeatureValuesChanged && mShell) {
2190 0 : MediaFeatureValuesChanged(nsRestyleHint(0));
2191 : }
2192 20 : }
2193 :
2194 : static bool
2195 1 : NotifyTabSizeModeChanged(TabParent* aTab, void* aArg)
2196 : {
2197 1 : nsSizeMode* sizeMode = static_cast<nsSizeMode*>(aArg);
2198 1 : aTab->SizeModeChanged(*sizeMode);
2199 1 : return false;
2200 : }
2201 :
2202 : void
2203 2 : nsPresContext::SizeModeChanged(nsSizeMode aSizeMode)
2204 : {
2205 2 : if (HasCachedStyleData()) {
2206 1 : nsContentUtils::CallOnAllRemoteChildren(mDocument->GetWindow(),
2207 : NotifyTabSizeModeChanged,
2208 1 : &aSizeMode);
2209 1 : MediaFeatureValuesChangedAllDocuments(nsRestyleHint(0));
2210 : }
2211 2 : }
2212 :
2213 : nsCompatibility
2214 748 : nsPresContext::CompatibilityMode() const
2215 : {
2216 748 : return Document()->GetCompatibilityMode();
2217 : }
2218 :
2219 : void
2220 0 : nsPresContext::SetPaginatedScrolling(bool aPaginated)
2221 : {
2222 0 : if (mType == eContext_PrintPreview || mType == eContext_PageLayout)
2223 0 : mCanPaginatedScroll = aPaginated;
2224 0 : }
2225 :
2226 : void
2227 0 : nsPresContext::SetPrintSettings(nsIPrintSettings *aPrintSettings)
2228 : {
2229 0 : if (mMedium == nsGkAtoms::print)
2230 0 : mPrintSettings = aPrintSettings;
2231 0 : }
2232 :
2233 : bool
2234 3 : nsPresContext::EnsureVisible()
2235 : {
2236 6 : nsCOMPtr<nsIDocShell> docShell(mContainer);
2237 3 : if (docShell) {
2238 3 : nsCOMPtr<nsIContentViewer> cv;
2239 3 : docShell->GetContentViewer(getter_AddRefs(cv));
2240 : // Make sure this is the content viewer we belong with
2241 3 : if (cv) {
2242 3 : RefPtr<nsPresContext> currentPresContext;
2243 3 : cv->GetPresContext(getter_AddRefs(currentPresContext));
2244 3 : if (currentPresContext == this) {
2245 : // OK, this is us. We want to call Show() on the content viewer.
2246 3 : nsresult result = cv->Show();
2247 3 : if (NS_SUCCEEDED(result)) {
2248 3 : return true;
2249 : }
2250 : }
2251 : }
2252 : }
2253 0 : return false;
2254 : }
2255 :
2256 : #ifdef MOZ_REFLOW_PERF
2257 : void
2258 735 : nsPresContext::CountReflows(const char * aName, nsIFrame * aFrame)
2259 : {
2260 735 : if (mShell) {
2261 735 : mShell->CountReflows(aName, aFrame);
2262 : }
2263 735 : }
2264 : #endif
2265 :
2266 : void
2267 11 : nsPresContext::UpdateIsChrome()
2268 : {
2269 18 : mIsChrome = mContainer &&
2270 18 : nsIDocShellTreeItem::typeChrome == mContainer->ItemType();
2271 11 : }
2272 :
2273 : bool
2274 0 : nsPresContext::HasAuthorSpecifiedRules(const nsIFrame* aFrame,
2275 : uint32_t aRuleTypeMask) const
2276 : {
2277 0 : if (mShell->StyleSet()->IsGecko()) {
2278 : return
2279 0 : nsRuleNode::HasAuthorSpecifiedRules(aFrame->StyleContext(),
2280 : aRuleTypeMask,
2281 0 : UseDocumentColors());
2282 : }
2283 0 : Element* elem = aFrame->GetContent()->AsElement();
2284 :
2285 0 : MOZ_ASSERT(elem->GetPseudoElementType() ==
2286 : aFrame->StyleContext()->GetPseudoType());
2287 0 : MOZ_ASSERT(elem->HasServoData());
2288 0 : return Servo_HasAuthorSpecifiedRules(elem,
2289 : aRuleTypeMask,
2290 0 : UseDocumentColors());
2291 : }
2292 :
2293 : gfxUserFontSet*
2294 423 : nsPresContext::GetUserFontSet(bool aFlushUserFontSet)
2295 : {
2296 423 : return mDocument->GetUserFontSet(aFlushUserFontSet);
2297 : }
2298 :
2299 : void
2300 0 : nsPresContext::UserFontSetUpdated(gfxUserFontEntry* aUpdatedFont)
2301 : {
2302 0 : if (!mShell)
2303 0 : return;
2304 :
2305 : // Note: this method is called without a font when rules in the userfont set
2306 : // are updated, which may occur during reflow as a result of the lazy
2307 : // initialization of the userfont set. It would be better to avoid a full
2308 : // restyle but until this method is only called outside of reflow, schedule a
2309 : // full restyle in these cases.
2310 0 : if (!aUpdatedFont) {
2311 0 : PostRebuildAllStyleDataEvent(NS_STYLE_HINT_REFLOW, eRestyle_ForceDescendants);
2312 0 : return;
2313 : }
2314 :
2315 : // Special case - if either the 'ex' or 'ch' units are used, these
2316 : // depend upon font metrics. Updating this information requires
2317 : // rebuilding the rule tree from the top, avoiding the reuse of cached
2318 : // data even when no style rules have changed.
2319 0 : if (UsesExChUnits()) {
2320 0 : PostRebuildAllStyleDataEvent(nsChangeHint(0), eRestyle_ForceDescendants);
2321 : }
2322 :
2323 : // Iterate over the frame tree looking for frames associated with the
2324 : // downloadable font family in question. If a frame's nsStyleFont has
2325 : // the name, check the font group associated with the metrics to see if
2326 : // it contains that specific font (i.e. the one chosen within the family
2327 : // given the weight, width, and slant from the nsStyleFont). If it does,
2328 : // mark that frame dirty and skip inspecting its descendants.
2329 0 : nsIFrame* root = mShell->GetRootFrame();
2330 0 : if (root) {
2331 0 : nsFontFaceUtils::MarkDirtyForFontChange(root, aUpdatedFont);
2332 : }
2333 : }
2334 :
2335 : class CounterStyleCleaner : public nsAPostRefreshObserver
2336 : {
2337 : public:
2338 0 : CounterStyleCleaner(nsRefreshDriver* aRefreshDriver,
2339 : CounterStyleManager* aCounterStyleManager)
2340 0 : : mRefreshDriver(aRefreshDriver)
2341 0 : , mCounterStyleManager(aCounterStyleManager)
2342 : {
2343 0 : }
2344 0 : virtual ~CounterStyleCleaner() {}
2345 :
2346 0 : void DidRefresh() final
2347 : {
2348 0 : mRefreshDriver->RemovePostRefreshObserver(this);
2349 0 : mCounterStyleManager->CleanRetiredStyles();
2350 0 : delete this;
2351 0 : }
2352 :
2353 : private:
2354 : RefPtr<nsRefreshDriver> mRefreshDriver;
2355 : RefPtr<CounterStyleManager> mCounterStyleManager;
2356 : };
2357 :
2358 : void
2359 190 : nsPresContext::FlushCounterStyles()
2360 : {
2361 190 : if (!mShell) {
2362 0 : return; // we've been torn down
2363 : }
2364 190 : if (mCounterStyleManager->IsInitial()) {
2365 : // Still in its initial state, no need to clean.
2366 190 : return;
2367 : }
2368 :
2369 0 : if (mCounterStylesDirty) {
2370 0 : bool changed = mCounterStyleManager->NotifyRuleChanged();
2371 0 : if (changed) {
2372 0 : PresShell()->NotifyCounterStylesAreDirty();
2373 0 : PostRebuildAllStyleDataEvent(NS_STYLE_HINT_REFLOW,
2374 0 : eRestyle_ForceDescendants);
2375 0 : RefreshDriver()->AddPostRefreshObserver(
2376 0 : new CounterStyleCleaner(RefreshDriver(), mCounterStyleManager));
2377 : }
2378 0 : mCounterStylesDirty = false;
2379 : }
2380 : }
2381 :
2382 : void
2383 57 : nsPresContext::RebuildCounterStyles()
2384 : {
2385 57 : if (mCounterStyleManager->IsInitial()) {
2386 : // Still in its initial state, no need to reset.
2387 57 : return;
2388 : }
2389 :
2390 0 : mCounterStylesDirty = true;
2391 0 : if (mShell) {
2392 0 : mShell->SetNeedStyleFlush();
2393 : }
2394 0 : if (!mPostedFlushCounterStyles) {
2395 : nsCOMPtr<nsIRunnable> ev =
2396 0 : NewRunnableMethod("nsPresContext::HandleRebuildCounterStyles",
2397 0 : this, &nsPresContext::HandleRebuildCounterStyles);
2398 : nsresult rv =
2399 0 : Document()->Dispatch("nsPresContext::HandleRebuildCounterStyles",
2400 : TaskCategory::Other,
2401 0 : ev.forget());
2402 0 : if (NS_SUCCEEDED(rv)) {
2403 0 : mPostedFlushCounterStyles = true;
2404 : }
2405 : }
2406 : }
2407 :
2408 : void
2409 68 : nsPresContext::NotifyMissingFonts()
2410 : {
2411 68 : if (mMissingFonts) {
2412 0 : mMissingFonts->Flush();
2413 : }
2414 68 : }
2415 :
2416 : void
2417 0 : nsPresContext::EnsureSafeToHandOutCSSRules()
2418 : {
2419 0 : if (!mShell->StyleSet()->EnsureUniqueInnerOnCSSSheets()) {
2420 : // Nothing to do.
2421 0 : return;
2422 : }
2423 :
2424 0 : RebuildAllStyleData(nsChangeHint(0), eRestyle_Subtree);
2425 : }
2426 :
2427 : void
2428 25 : nsPresContext::FireDOMPaintEvent(nsTArray<nsRect>* aList, uint64_t aTransactionId,
2429 : mozilla::TimeStamp aTimeStamp /* = mozilla::TimeStamp() */)
2430 : {
2431 25 : nsPIDOMWindowInner* ourWindow = mDocument->GetInnerWindow();
2432 25 : if (!ourWindow)
2433 0 : return;
2434 :
2435 50 : nsCOMPtr<EventTarget> dispatchTarget = do_QueryInterface(ourWindow);
2436 50 : nsCOMPtr<EventTarget> eventTarget = dispatchTarget;
2437 25 : if (!IsChrome() && !mSendAfterPaintToContent) {
2438 : // Don't tell the window about this event, it should not know that
2439 : // something happened in a subdocument. Tell only the chrome event handler.
2440 : // (Events sent to the window get propagated to the chrome event handler
2441 : // automatically.)
2442 0 : dispatchTarget = do_QueryInterface(ourWindow->GetParentTarget());
2443 0 : if (!dispatchTarget) {
2444 0 : return;
2445 : }
2446 : }
2447 :
2448 25 : if (aTimeStamp.IsNull()) {
2449 0 : aTimeStamp = mozilla::TimeStamp::Now();
2450 : }
2451 25 : DOMHighResTimeStamp timeStamp = 0;
2452 25 : if (ourWindow && ourWindow->IsInnerWindow()) {
2453 25 : mozilla::dom::Performance* perf = ourWindow->GetPerformance();
2454 25 : if (perf) {
2455 25 : timeStamp = perf->GetDOMTiming()->TimeStampToDOMHighRes(aTimeStamp);
2456 : }
2457 : }
2458 :
2459 : // Events sent to the window get propagated to the chrome event handler
2460 : // automatically.
2461 : //
2462 : // This will empty our list in case dispatching the event causes more damage
2463 : // (hopefully it won't, or we're likely to get an infinite loop! At least
2464 : // it won't be blocking app execution though).
2465 : RefPtr<NotifyPaintEvent> event =
2466 50 : NS_NewDOMNotifyPaintEvent(eventTarget, this, nullptr, eAfterPaint, aList,
2467 50 : aTransactionId, timeStamp);
2468 :
2469 : // Even if we're not telling the window about the event (so eventTarget is
2470 : // the chrome event handler, not the window), the window is still
2471 : // logically the event target.
2472 25 : event->SetTarget(eventTarget);
2473 25 : event->SetTrusted(true);
2474 : EventDispatcher::DispatchDOMEvent(dispatchTarget, nullptr,
2475 25 : static_cast<Event*>(event), this, nullptr);
2476 : }
2477 :
2478 : static bool
2479 0 : MayHavePaintEventListenerSubdocumentCallback(nsIDocument* aDocument, void* aData)
2480 : {
2481 0 : bool *result = static_cast<bool*>(aData);
2482 0 : nsIPresShell* shell = aDocument->GetShell();
2483 0 : if (shell) {
2484 0 : nsPresContext* pc = shell->GetPresContext();
2485 0 : if (pc) {
2486 0 : *result = pc->MayHavePaintEventListenerInSubDocument();
2487 :
2488 : // If we found a paint event listener, then we can stop enumerating
2489 : // sub documents.
2490 0 : return !*result;
2491 : }
2492 : }
2493 0 : return true;
2494 : }
2495 :
2496 : static bool
2497 45 : MayHavePaintEventListener(nsPIDOMWindowInner* aInnerWindow)
2498 : {
2499 45 : if (!aInnerWindow)
2500 18 : return false;
2501 27 : if (aInnerWindow->HasPaintEventListeners())
2502 27 : return true;
2503 :
2504 0 : EventTarget* parentTarget = aInnerWindow->GetParentTarget();
2505 0 : if (!parentTarget)
2506 0 : return false;
2507 :
2508 0 : EventListenerManager* manager = nullptr;
2509 0 : if ((manager = parentTarget->GetExistingListenerManager()) &&
2510 0 : manager->MayHavePaintEventListener()) {
2511 0 : return true;
2512 : }
2513 :
2514 0 : nsCOMPtr<nsINode> node;
2515 0 : if (parentTarget != aInnerWindow->GetChromeEventHandler()) {
2516 : nsCOMPtr<nsIInProcessContentFrameMessageManager> mm =
2517 0 : do_QueryInterface(parentTarget);
2518 0 : if (mm) {
2519 0 : node = mm->GetOwnerContent();
2520 : }
2521 : }
2522 :
2523 0 : if (!node) {
2524 0 : node = do_QueryInterface(parentTarget);
2525 : }
2526 0 : if (node)
2527 0 : return MayHavePaintEventListener(node->OwnerDoc()->GetInnerWindow());
2528 :
2529 0 : nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(parentTarget);
2530 0 : if (window)
2531 0 : return MayHavePaintEventListener(window);
2532 :
2533 0 : nsCOMPtr<nsPIWindowRoot> root = do_QueryInterface(parentTarget);
2534 : EventTarget* tabChildGlobal;
2535 0 : return root &&
2536 0 : (tabChildGlobal = root->GetParentTarget()) &&
2537 0 : (manager = tabChildGlobal->GetExistingListenerManager()) &&
2538 0 : manager->MayHavePaintEventListener();
2539 : }
2540 :
2541 : bool
2542 45 : nsPresContext::MayHavePaintEventListener()
2543 : {
2544 45 : return ::MayHavePaintEventListener(mDocument->GetInnerWindow());
2545 : }
2546 :
2547 : bool
2548 45 : nsPresContext::MayHavePaintEventListenerInSubDocument()
2549 : {
2550 45 : if (MayHavePaintEventListener()) {
2551 27 : return true;
2552 : }
2553 :
2554 18 : bool result = false;
2555 18 : mDocument->EnumerateSubDocuments(MayHavePaintEventListenerSubdocumentCallback, &result);
2556 18 : return result;
2557 : }
2558 :
2559 : void
2560 25 : nsPresContext::NotifyInvalidation(uint64_t aTransactionId, const nsIntRect& aRect)
2561 : {
2562 : // Prevent values from overflow after DevPixelsToAppUnits().
2563 : //
2564 : // DevPixelsTopAppUnits() will multiple a factor (60) to the value,
2565 : // it may make the result value over the edge (overflow) of max or
2566 : // min value of int32_t. Compute the max sized dev pixel rect that
2567 : // we can support and intersect with it.
2568 25 : nsIntRect clampedRect = nsIntRect::MaxIntRect();
2569 25 : clampedRect.ScaleInverseRoundIn(AppUnitsPerDevPixel());
2570 :
2571 25 : clampedRect = clampedRect.Intersect(aRect);
2572 :
2573 : nsRect rect(DevPixelsToAppUnits(clampedRect.x),
2574 : DevPixelsToAppUnits(clampedRect.y),
2575 : DevPixelsToAppUnits(clampedRect.width),
2576 50 : DevPixelsToAppUnits(clampedRect.height));
2577 25 : NotifyInvalidation(aTransactionId, rect);
2578 25 : }
2579 :
2580 : void
2581 25 : nsPresContext::NotifyInvalidation(uint64_t aTransactionId, const nsRect& aRect)
2582 : {
2583 25 : MOZ_ASSERT(GetContainerWeak(), "Invalidation in detached pres context");
2584 :
2585 : // If there is no paint event listener, then we don't need to fire
2586 : // the asynchronous event. We don't even need to record invalidation.
2587 : // MayHavePaintEventListener is pretty cheap and we could make it
2588 : // even cheaper by providing a more efficient
2589 : // nsPIDOMWindow::GetListenerManager.
2590 :
2591 : nsPresContext* pc;
2592 30 : for (pc = this; pc; pc = pc->GetParentPresContext()) {
2593 25 : if (pc->mFireAfterPaintEvents)
2594 20 : break;
2595 5 : pc->mFireAfterPaintEvents = true;
2596 : }
2597 25 : if (!pc) {
2598 5 : nsRootPresContext* rpc = GetRootPresContext();
2599 5 : if (rpc) {
2600 5 : rpc->EnsureEventualDidPaintEvent(aTransactionId);
2601 : }
2602 : }
2603 :
2604 25 : TransactionInvalidations* transaction = nullptr;
2605 49 : for (TransactionInvalidations& t : mTransactions) {
2606 24 : if (t.mTransactionId == aTransactionId) {
2607 0 : transaction = &t;
2608 0 : break;
2609 : }
2610 : }
2611 25 : if (!transaction) {
2612 25 : transaction = mTransactions.AppendElement();
2613 25 : transaction->mTransactionId = aTransactionId;
2614 : }
2615 :
2616 25 : transaction->mInvalidations.AppendElement(aRect);
2617 25 : }
2618 :
2619 : /* static */ void
2620 82 : nsPresContext::NotifySubDocInvalidation(ContainerLayer* aContainer,
2621 : const nsIntRegion& aRegion)
2622 : {
2623 : ContainerLayerPresContext *data =
2624 : static_cast<ContainerLayerPresContext*>(
2625 82 : aContainer->GetUserData(&gNotifySubDocInvalidationData));
2626 82 : if (!data) {
2627 82 : return;
2628 : }
2629 :
2630 0 : nsIntPoint topLeft = aContainer->GetVisibleRegion().ToUnknownRegion().GetBounds().TopLeft();
2631 :
2632 0 : for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
2633 0 : nsIntRect rect(iter.Get());
2634 : //PresContext coordinate space is relative to the start of our visible
2635 : // region. Is this really true? This feels like the wrong way to get the right
2636 : // answer.
2637 0 : rect.MoveBy(-topLeft);
2638 0 : data->mPresContext->NotifyInvalidation(aContainer->Manager()->GetLastTransactionId(), rect);
2639 : }
2640 : }
2641 :
2642 : void
2643 0 : nsPresContext::SetNotifySubDocInvalidationData(ContainerLayer* aContainer)
2644 : {
2645 0 : ContainerLayerPresContext* pres = new ContainerLayerPresContext;
2646 0 : pres->mPresContext = this;
2647 0 : aContainer->SetUserData(&gNotifySubDocInvalidationData, pres);
2648 0 : }
2649 :
2650 : /* static */ void
2651 239 : nsPresContext::ClearNotifySubDocInvalidationData(ContainerLayer* aContainer)
2652 : {
2653 239 : aContainer->SetUserData(&gNotifySubDocInvalidationData, nullptr);
2654 239 : }
2655 :
2656 : struct NotifyDidPaintSubdocumentCallbackClosure {
2657 : uint64_t mTransactionId;
2658 : const mozilla::TimeStamp& mTimeStamp;
2659 : bool mNeedsAnotherDidPaintNotification;
2660 : };
2661 : /* static */ bool
2662 23 : nsPresContext::NotifyDidPaintSubdocumentCallback(nsIDocument* aDocument, void* aData)
2663 : {
2664 : NotifyDidPaintSubdocumentCallbackClosure* closure =
2665 23 : static_cast<NotifyDidPaintSubdocumentCallbackClosure*>(aData);
2666 23 : nsIPresShell* shell = aDocument->GetShell();
2667 23 : if (shell) {
2668 0 : nsPresContext* pc = shell->GetPresContext();
2669 0 : if (pc) {
2670 0 : pc->NotifyDidPaintForSubtree(closure->mTransactionId,
2671 0 : closure->mTimeStamp);
2672 0 : if (pc->mFireAfterPaintEvents) {
2673 0 : closure->mNeedsAnotherDidPaintNotification = true;
2674 : }
2675 : }
2676 : }
2677 23 : return true;
2678 : }
2679 :
2680 75 : class DelayedFireDOMPaintEvent : public Runnable {
2681 : public:
2682 25 : DelayedFireDOMPaintEvent(
2683 : nsPresContext* aPresContext,
2684 : nsTArray<nsRect>* aList,
2685 : uint64_t aTransactionId,
2686 : const mozilla::TimeStamp& aTimeStamp = mozilla::TimeStamp())
2687 25 : : mozilla::Runnable("DelayedFireDOMPaintEvent")
2688 : , mPresContext(aPresContext)
2689 : , mTransactionId(aTransactionId)
2690 25 : , mTimeStamp(aTimeStamp)
2691 : {
2692 25 : MOZ_ASSERT(mPresContext->GetContainerWeak(),
2693 : "DOMPaintEvent requested for a detached pres context");
2694 25 : mList.SwapElements(*aList);
2695 25 : }
2696 25 : NS_IMETHOD Run() override
2697 : {
2698 : // The pres context might have been detached during the delay -
2699 : // that's fine, just don't fire the event.
2700 25 : if (mPresContext->GetContainerWeak()) {
2701 25 : mPresContext->FireDOMPaintEvent(&mList, mTransactionId, mTimeStamp);
2702 : }
2703 25 : return NS_OK;
2704 : }
2705 :
2706 : RefPtr<nsPresContext> mPresContext;
2707 : uint64_t mTransactionId;
2708 : const mozilla::TimeStamp mTimeStamp;
2709 : nsTArray<nsRect> mList;
2710 : };
2711 :
2712 : void
2713 27 : nsPresContext::NotifyDidPaintForSubtree(uint64_t aTransactionId,
2714 : const mozilla::TimeStamp& aTimeStamp)
2715 : {
2716 27 : if (IsRoot()) {
2717 27 : static_cast<nsRootPresContext*>(this)->CancelDidPaintTimers(aTransactionId);
2718 :
2719 27 : if (!mFireAfterPaintEvents) {
2720 4 : return;
2721 : }
2722 : }
2723 :
2724 25 : if (!PresShell()->IsVisible() && !mFireAfterPaintEvents) {
2725 0 : return;
2726 : }
2727 :
2728 : // Non-root prescontexts fire MozAfterPaint to all their descendants
2729 : // unconditionally, even if no invalidations have been collected. This is
2730 : // because we don't want to eat the cost of collecting invalidations for
2731 : // every subdocument (which would require putting every subdocument in its
2732 : // own layer).
2733 :
2734 25 : bool sent = false;
2735 25 : uint32_t i = 0;
2736 123 : while (i < mTransactions.Length()) {
2737 49 : if (mTransactions[i].mTransactionId <= aTransactionId) {
2738 : nsCOMPtr<nsIRunnable> ev =
2739 24 : new DelayedFireDOMPaintEvent(this, &mTransactions[i].mInvalidations,
2740 72 : mTransactions[i].mTransactionId, aTimeStamp);
2741 24 : nsContentUtils::AddScriptRunner(ev);
2742 24 : sent = true;
2743 24 : mTransactions.RemoveElementAt(i);
2744 : } else {
2745 25 : i++;
2746 : }
2747 : }
2748 :
2749 25 : if (!sent) {
2750 2 : nsTArray<nsRect> dummy;
2751 : nsCOMPtr<nsIRunnable> ev =
2752 : new DelayedFireDOMPaintEvent(this, &dummy,
2753 2 : aTransactionId, aTimeStamp);
2754 1 : nsContentUtils::AddScriptRunner(ev);
2755 : }
2756 :
2757 25 : NotifyDidPaintSubdocumentCallbackClosure closure = { aTransactionId, aTimeStamp, false };
2758 25 : mDocument->EnumerateSubDocuments(nsPresContext::NotifyDidPaintSubdocumentCallback, &closure);
2759 :
2760 50 : if (!closure.mNeedsAnotherDidPaintNotification &&
2761 25 : mTransactions.IsEmpty()) {
2762 : // Nothing more to do for the moment.
2763 4 : mFireAfterPaintEvents = false;
2764 : }
2765 : }
2766 :
2767 : bool
2768 61 : nsPresContext::HasCachedStyleData()
2769 : {
2770 61 : if (!mShell) {
2771 0 : return false;
2772 : }
2773 :
2774 61 : nsStyleSet* styleSet = mShell->StyleSet()->GetAsGecko();
2775 61 : if (!styleSet) {
2776 : // XXXheycam ServoStyleSets do not use the rule tree, so just assume for now
2777 : // that we need to restyle when e.g. dppx changes assuming we're sufficiently
2778 : // bootstrapped.
2779 0 : return mShell->DidInitialize();
2780 : }
2781 :
2782 61 : return styleSet->HasCachedStyleData();
2783 : }
2784 :
2785 : already_AddRefed<nsITimer>
2786 0 : nsPresContext::CreateTimer(nsTimerCallbackFunc aCallback,
2787 : const char* aName,
2788 : uint32_t aDelay)
2789 : {
2790 0 : nsCOMPtr<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1");
2791 0 : timer->SetTarget(Document()->EventTargetFor(TaskCategory::Other));
2792 0 : if (timer) {
2793 0 : nsresult rv = timer->InitWithNamedFuncCallback(aCallback, this, aDelay,
2794 : nsITimer::TYPE_ONE_SHOT,
2795 0 : aName);
2796 0 : if (NS_SUCCEEDED(rv)) {
2797 0 : return timer.forget();
2798 : }
2799 : }
2800 :
2801 0 : return nullptr;
2802 : }
2803 :
2804 : static bool sGotInterruptEnv = false;
2805 : enum InterruptMode {
2806 : ModeRandom,
2807 : ModeCounter,
2808 : ModeEvent
2809 : };
2810 : // Controlled by the GECKO_REFLOW_INTERRUPT_MODE env var; allowed values are
2811 : // "random" (except on Windows) or "counter". If neither is used, the mode is
2812 : // ModeEvent.
2813 : static InterruptMode sInterruptMode = ModeEvent;
2814 : #ifndef XP_WIN
2815 : // Used for the "random" mode. Controlled by the GECKO_REFLOW_INTERRUPT_SEED
2816 : // env var.
2817 : static uint32_t sInterruptSeed = 1;
2818 : #endif
2819 : // Used for the "counter" mode. This is the number of unskipped interrupt
2820 : // checks that have to happen before we interrupt. Controlled by the
2821 : // GECKO_REFLOW_INTERRUPT_FREQUENCY env var.
2822 : static uint32_t sInterruptMaxCounter = 10;
2823 : // Used for the "counter" mode. This counts up to sInterruptMaxCounter and is
2824 : // then reset to 0.
2825 : static uint32_t sInterruptCounter;
2826 : // Number of interrupt checks to skip before really trying to interrupt.
2827 : // Controlled by the GECKO_REFLOW_INTERRUPT_CHECKS_TO_SKIP env var.
2828 : static uint32_t sInterruptChecksToSkip = 200;
2829 : // Number of milliseconds that a reflow should be allowed to run for before we
2830 : // actually allow interruption. Controlled by the
2831 : // GECKO_REFLOW_MIN_NOINTERRUPT_DURATION env var. Can't be initialized here,
2832 : // because TimeDuration/TimeStamp is not safe to use in static constructors..
2833 : static TimeDuration sInterruptTimeout;
2834 :
2835 2 : static void GetInterruptEnv()
2836 : {
2837 2 : char *ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_MODE");
2838 2 : if (ev) {
2839 : #ifndef XP_WIN
2840 0 : if (PL_strcasecmp(ev, "random") == 0) {
2841 0 : ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_SEED");
2842 0 : if (ev) {
2843 0 : sInterruptSeed = atoi(ev);
2844 : }
2845 0 : srandom(sInterruptSeed);
2846 0 : sInterruptMode = ModeRandom;
2847 : } else
2848 : #endif
2849 0 : if (PL_strcasecmp(ev, "counter") == 0) {
2850 0 : ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_FREQUENCY");
2851 0 : if (ev) {
2852 0 : sInterruptMaxCounter = atoi(ev);
2853 : }
2854 0 : sInterruptCounter = 0;
2855 0 : sInterruptMode = ModeCounter;
2856 : }
2857 : }
2858 2 : ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_CHECKS_TO_SKIP");
2859 2 : if (ev) {
2860 0 : sInterruptChecksToSkip = atoi(ev);
2861 : }
2862 :
2863 2 : ev = PR_GetEnv("GECKO_REFLOW_MIN_NOINTERRUPT_DURATION");
2864 2 : int duration_ms = ev ? atoi(ev) : 100;
2865 2 : sInterruptTimeout = TimeDuration::FromMilliseconds(duration_ms);
2866 2 : }
2867 :
2868 : bool
2869 0 : nsPresContext::HavePendingInputEvent()
2870 : {
2871 0 : switch (sInterruptMode) {
2872 : #ifndef XP_WIN
2873 : case ModeRandom:
2874 0 : return (random() & 1);
2875 : #endif
2876 : case ModeCounter:
2877 0 : if (sInterruptCounter < sInterruptMaxCounter) {
2878 0 : ++sInterruptCounter;
2879 0 : return false;
2880 : }
2881 0 : sInterruptCounter = 0;
2882 0 : return true;
2883 : default:
2884 : case ModeEvent: {
2885 0 : nsIFrame* f = PresShell()->GetRootFrame();
2886 0 : if (f) {
2887 0 : nsIWidget* w = f->GetNearestWidget();
2888 0 : if (w) {
2889 0 : return w->HasPendingInputEvent();
2890 : }
2891 : }
2892 0 : return false;
2893 : }
2894 : }
2895 : }
2896 :
2897 : void
2898 41 : nsPresContext::NotifyFontFaceSetOnRefresh()
2899 : {
2900 41 : FontFaceSet* set = mDocument->GetFonts();
2901 41 : if (set) {
2902 0 : set->DidRefresh();
2903 : }
2904 41 : }
2905 :
2906 : bool
2907 0 : nsPresContext::HasPendingRestyleOrReflow()
2908 : {
2909 0 : nsIPresShell* shell = PresShell();
2910 0 : return shell->NeedStyleFlush() || shell->HasPendingReflow();
2911 : }
2912 :
2913 : void
2914 70 : nsPresContext::ReflowStarted(bool aInterruptible)
2915 : {
2916 : #ifdef NOISY_INTERRUPTIBLE_REFLOW
2917 : if (!aInterruptible) {
2918 : printf("STARTING NONINTERRUPTIBLE REFLOW\n");
2919 : }
2920 : #endif
2921 : // We don't support interrupting in paginated contexts, since page
2922 : // sequences only handle initial reflow
2923 108 : mInterruptsEnabled = aInterruptible && !IsPaginated() &&
2924 38 : nsLayoutUtils::InterruptibleReflowEnabled();
2925 :
2926 : // Don't set mHasPendingInterrupt based on HavePendingInputEvent() here. If
2927 : // we ever change that, then we need to update the code in
2928 : // PresShell::DoReflow to only add the just-reflown root to dirty roots if
2929 : // it's actually dirty. Otherwise we can end up adding a root that has no
2930 : // interruptible descendants, just because we detected an interrupt at reflow
2931 : // start.
2932 70 : mHasPendingInterrupt = false;
2933 :
2934 70 : mInterruptChecksToSkip = sInterruptChecksToSkip;
2935 :
2936 70 : if (mInterruptsEnabled) {
2937 38 : mReflowStartTime = TimeStamp::Now();
2938 : }
2939 70 : }
2940 :
2941 : bool
2942 162 : nsPresContext::CheckForInterrupt(nsIFrame* aFrame)
2943 : {
2944 162 : if (mHasPendingInterrupt) {
2945 0 : mShell->FrameNeedsToContinueReflow(aFrame);
2946 0 : return true;
2947 : }
2948 :
2949 162 : if (!sGotInterruptEnv) {
2950 2 : sGotInterruptEnv = true;
2951 2 : GetInterruptEnv();
2952 : }
2953 :
2954 162 : if (!mInterruptsEnabled) {
2955 60 : return false;
2956 : }
2957 :
2958 102 : if (mInterruptChecksToSkip > 0) {
2959 102 : --mInterruptChecksToSkip;
2960 102 : return false;
2961 : }
2962 0 : mInterruptChecksToSkip = sInterruptChecksToSkip;
2963 :
2964 : // Don't interrupt if it's been less than sInterruptTimeout since we started
2965 : // the reflow.
2966 0 : mHasPendingInterrupt =
2967 0 : TimeStamp::Now() - mReflowStartTime > sInterruptTimeout &&
2968 0 : HavePendingInputEvent() &&
2969 0 : !IsChrome();
2970 :
2971 0 : if (mPendingInterruptFromTest) {
2972 0 : mPendingInterruptFromTest = false;
2973 0 : mHasPendingInterrupt = true;
2974 : }
2975 :
2976 0 : if (mHasPendingInterrupt) {
2977 : #ifdef NOISY_INTERRUPTIBLE_REFLOW
2978 : printf("*** DETECTED pending interrupt (time=%lld)\n", PR_Now());
2979 : #endif /* NOISY_INTERRUPTIBLE_REFLOW */
2980 0 : mShell->FrameNeedsToContinueReflow(aFrame);
2981 : }
2982 0 : return mHasPendingInterrupt;
2983 : }
2984 :
2985 : nsIFrame*
2986 6 : nsPresContext::GetPrimaryFrameFor(nsIContent* aContent)
2987 : {
2988 6 : NS_PRECONDITION(aContent, "Don't do that");
2989 12 : if (GetPresShell() &&
2990 6 : GetPresShell()->GetDocument() == aContent->GetComposedDoc()) {
2991 6 : return aContent->GetPrimaryFrame();
2992 : }
2993 0 : return nullptr;
2994 : }
2995 :
2996 : size_t
2997 21 : nsPresContext::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
2998 : {
2999 21 : return mLangGroupFontPrefs.SizeOfExcludingThis(aMallocSizeOf);
3000 :
3001 : // Measurement of other members may be added later if DMD finds it is
3002 : // worthwhile.
3003 : }
3004 :
3005 : bool
3006 305 : nsPresContext::IsRootContentDocument() const
3007 : {
3008 : // We are a root content document if: we are not a resource doc, we are
3009 : // not chrome, and we either have no parent or our parent is chrome.
3010 305 : if (mDocument->IsResourceDoc()) {
3011 96 : return false;
3012 : }
3013 209 : if (IsChrome()) {
3014 118 : return false;
3015 : }
3016 : // We may not have a root frame, so use views.
3017 91 : nsView* view = PresShell()->GetViewManager()->GetRootView();
3018 91 : if (!view) {
3019 0 : return false;
3020 : }
3021 91 : view = view->GetParent(); // anonymous inner view
3022 91 : if (!view) {
3023 90 : return true;
3024 : }
3025 1 : view = view->GetParent(); // subdocumentframe's view
3026 1 : if (!view) {
3027 0 : return true;
3028 : }
3029 :
3030 1 : nsIFrame* f = view->GetFrame();
3031 1 : return (f && f->PresContext()->IsChrome());
3032 : }
3033 :
3034 : void
3035 2 : nsPresContext::NotifyNonBlankPaint()
3036 : {
3037 2 : MOZ_ASSERT(!mHadNonBlankPaint);
3038 2 : mHadNonBlankPaint = true;
3039 2 : if (IsRootContentDocument()) {
3040 2 : RefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
3041 1 : if (timing) {
3042 1 : timing->NotifyNonBlankPaintForRootContentDocument();
3043 : }
3044 :
3045 1 : mFirstNonBlankPaintTime = TimeStamp::Now();
3046 : }
3047 2 : }
3048 :
3049 84 : bool nsPresContext::GetPaintFlashing() const
3050 : {
3051 84 : if (!mPaintFlashingInitialized) {
3052 20 : bool pref = Preferences::GetBool("nglayout.debug.paint_flashing");
3053 20 : if (!pref && IsChrome()) {
3054 1 : pref = Preferences::GetBool("nglayout.debug.paint_flashing_chrome");
3055 : }
3056 20 : mPaintFlashing = pref;
3057 20 : mPaintFlashingInitialized = true;
3058 : }
3059 84 : return mPaintFlashing;
3060 : }
3061 :
3062 : int32_t
3063 17632 : nsPresContext::AppUnitsPerDevPixel() const
3064 : {
3065 17632 : return mDeviceContext->AppUnitsPerDevPixel();
3066 : }
3067 :
3068 : nscoord
3069 0 : nsPresContext::GfxUnitsToAppUnits(gfxFloat aGfxUnits) const
3070 : {
3071 0 : return mDeviceContext->GfxUnitsToAppUnits(aGfxUnits);
3072 : }
3073 :
3074 : gfxFloat
3075 172 : nsPresContext::AppUnitsToGfxUnits(nscoord aAppUnits) const
3076 : {
3077 172 : return mDeviceContext->AppUnitsToGfxUnits(aAppUnits);
3078 : }
3079 :
3080 : bool
3081 0 : nsPresContext::IsDeviceSizePageSize()
3082 : {
3083 0 : bool isDeviceSizePageSize = false;
3084 0 : nsCOMPtr<nsIDocShell> docShell(mContainer);
3085 0 : if (docShell) {
3086 0 : isDeviceSizePageSize = docShell->GetDeviceSizeIsPageSize();
3087 : }
3088 0 : return isDeviceSizePageSize;
3089 : }
3090 :
3091 : uint64_t
3092 0 : nsPresContext::GetRestyleGeneration() const
3093 : {
3094 0 : if (!mRestyleManager) {
3095 0 : return 0;
3096 : }
3097 0 : return mRestyleManager->GetRestyleGeneration();
3098 : }
3099 :
3100 : uint64_t
3101 4 : nsPresContext::GetUndisplayedRestyleGeneration() const
3102 : {
3103 4 : if (!mRestyleManager) {
3104 0 : return 0;
3105 : }
3106 4 : return mRestyleManager->GetUndisplayedRestyleGeneration();
3107 : }
3108 :
3109 : nsBidi&
3110 0 : nsPresContext::GetBidiEngine()
3111 : {
3112 0 : MOZ_ASSERT(NS_IsMainThread());
3113 :
3114 0 : if (!mBidiEngine) {
3115 0 : mBidiEngine.reset(new nsBidi());
3116 : }
3117 0 : return *mBidiEngine;
3118 : }
3119 :
3120 27 : nsRootPresContext::nsRootPresContext(nsIDocument* aDocument,
3121 27 : nsPresContextType aType)
3122 : : nsPresContext(aDocument, aType),
3123 27 : mDOMGeneration(0)
3124 : {
3125 27 : }
3126 :
3127 0 : nsRootPresContext::~nsRootPresContext()
3128 : {
3129 0 : NS_ASSERTION(mRegisteredPlugins.Count() == 0,
3130 : "All plugins should have been unregistered");
3131 0 : CancelAllDidPaintTimers();
3132 0 : CancelApplyPluginGeometryTimer();
3133 0 : }
3134 :
3135 : /* virtual */ void
3136 3 : nsRootPresContext::Detach()
3137 : {
3138 3 : CancelAllDidPaintTimers();
3139 : // XXXmats maybe also CancelApplyPluginGeometryTimer(); ?
3140 3 : nsPresContext::Detach();
3141 3 : }
3142 :
3143 : void
3144 0 : nsRootPresContext::RegisterPluginForGeometryUpdates(nsIContent* aPlugin)
3145 : {
3146 0 : mRegisteredPlugins.PutEntry(aPlugin);
3147 0 : }
3148 :
3149 : void
3150 0 : nsRootPresContext::UnregisterPluginForGeometryUpdates(nsIContent* aPlugin)
3151 : {
3152 0 : mRegisteredPlugins.RemoveEntry(aPlugin);
3153 0 : }
3154 :
3155 : void
3156 0 : nsRootPresContext::ComputePluginGeometryUpdates(nsIFrame* aFrame,
3157 : nsDisplayListBuilder* aBuilder,
3158 : nsDisplayList* aList)
3159 : {
3160 0 : if (mRegisteredPlugins.Count() == 0) {
3161 0 : return;
3162 : }
3163 :
3164 : // Initially make the next state for each plugin descendant of aFrame be
3165 : // "hidden". Plugins that are visible will have their next state set to
3166 : // unhidden by nsDisplayPlugin::ComputeVisibility.
3167 0 : for (auto iter = mRegisteredPlugins.Iter(); !iter.Done(); iter.Next()) {
3168 0 : auto f = static_cast<nsPluginFrame*>(iter.Get()->GetKey()->GetPrimaryFrame());
3169 0 : if (!f) {
3170 0 : NS_WARNING("Null frame in ComputePluginGeometryUpdates");
3171 0 : continue;
3172 : }
3173 0 : if (!nsLayoutUtils::IsAncestorFrameCrossDoc(aFrame, f)) {
3174 : // f is not managed by this frame so we should ignore it.
3175 0 : continue;
3176 : }
3177 0 : f->SetEmptyWidgetConfiguration();
3178 : }
3179 :
3180 0 : if (aBuilder) {
3181 0 : MOZ_ASSERT(aList);
3182 0 : nsIFrame* rootFrame = FrameManager()->GetRootFrame();
3183 :
3184 0 : if (rootFrame && aBuilder->ContainsPluginItem()) {
3185 0 : aBuilder->SetForPluginGeometry();
3186 0 : aBuilder->SetAccurateVisibleRegions();
3187 : // Merging and flattening has already been done and we should not do it
3188 : // again. nsDisplayScroll(Info)Layer doesn't support trying to flatten
3189 : // again.
3190 0 : aBuilder->SetAllowMergingAndFlattening(false);
3191 0 : nsRegion region = rootFrame->GetVisualOverflowRectRelativeToSelf();
3192 : // nsDisplayPlugin::ComputeVisibility will automatically set a non-hidden
3193 : // widget configuration for the plugin, if it's visible.
3194 0 : aList->ComputeVisibilityForRoot(aBuilder, ®ion);
3195 : }
3196 : }
3197 :
3198 : #ifdef XP_MACOSX
3199 : // We control painting of Mac plugins, so just apply geometry updates now.
3200 : // This is not happening during a paint event.
3201 : ApplyPluginGeometryUpdates();
3202 : #else
3203 0 : if (XRE_IsParentProcess()) {
3204 0 : InitApplyPluginGeometryTimer();
3205 : }
3206 : #endif
3207 : }
3208 :
3209 : static void
3210 0 : ApplyPluginGeometryUpdatesCallback(nsITimer *aTimer, void *aClosure)
3211 : {
3212 0 : static_cast<nsRootPresContext*>(aClosure)->ApplyPluginGeometryUpdates();
3213 0 : }
3214 :
3215 : void
3216 0 : nsRootPresContext::InitApplyPluginGeometryTimer()
3217 : {
3218 0 : if (mApplyPluginGeometryTimer) {
3219 0 : return;
3220 : }
3221 :
3222 : // We'll apply the plugin geometry updates during the next compositing paint in this
3223 : // presContext (either from nsPresShell::WillPaintWindow or from
3224 : // nsPresShell::DidPaintWindow, depending on the platform). But paints might
3225 : // get optimized away if the old plugin geometry covers the invalid region,
3226 : // so set a backup timer to do this too. We want to make sure this
3227 : // won't fire before our normal paint notifications, if those would
3228 : // update the geometry, so set it for double the refresh driver interval.
3229 0 : mApplyPluginGeometryTimer = CreateTimer(ApplyPluginGeometryUpdatesCallback,
3230 : "ApplyPluginGeometryUpdatesCallback",
3231 0 : nsRefreshDriver::DefaultInterval() * 2);
3232 : }
3233 :
3234 : void
3235 6 : nsRootPresContext::CancelApplyPluginGeometryTimer()
3236 : {
3237 6 : if (mApplyPluginGeometryTimer) {
3238 0 : mApplyPluginGeometryTimer->Cancel();
3239 0 : mApplyPluginGeometryTimer = nullptr;
3240 : }
3241 6 : }
3242 :
3243 : #ifndef XP_MACOSX
3244 :
3245 : static bool
3246 0 : HasOverlap(const LayoutDeviceIntPoint& aOffset1,
3247 : const nsTArray<LayoutDeviceIntRect>& aClipRects1,
3248 : const LayoutDeviceIntPoint& aOffset2,
3249 : const nsTArray<LayoutDeviceIntRect>& aClipRects2)
3250 : {
3251 0 : LayoutDeviceIntPoint offsetDelta = aOffset1 - aOffset2;
3252 0 : for (uint32_t i = 0; i < aClipRects1.Length(); ++i) {
3253 0 : for (uint32_t j = 0; j < aClipRects2.Length(); ++j) {
3254 0 : if ((aClipRects1[i] + offsetDelta).Intersects(aClipRects2[j])) {
3255 0 : return true;
3256 : }
3257 : }
3258 : }
3259 0 : return false;
3260 : }
3261 :
3262 : /**
3263 : * Given a list of plugin windows to move to new locations, sort the list
3264 : * so that for each window move, the window moves to a location that
3265 : * does not intersect other windows. This minimizes flicker and repainting.
3266 : * It's not always possible to do this perfectly, since in general
3267 : * we might have cycles. But we do our best.
3268 : * We need to take into account that windows are clipped to particular
3269 : * regions and the clip regions change as the windows are moved.
3270 : */
3271 : static void
3272 0 : SortConfigurations(nsTArray<nsIWidget::Configuration>* aConfigurations)
3273 : {
3274 0 : if (aConfigurations->Length() > 10) {
3275 : // Give up, we don't want to get bogged down here
3276 0 : return;
3277 : }
3278 :
3279 0 : nsTArray<nsIWidget::Configuration> pluginsToMove;
3280 0 : pluginsToMove.SwapElements(*aConfigurations);
3281 :
3282 : // Our algorithm is quite naive. At each step we try to identify
3283 : // a window that can be moved to its new location that won't overlap
3284 : // any other windows at the new location. If there is no such
3285 : // window, we just move the last window in the list anyway.
3286 0 : while (!pluginsToMove.IsEmpty()) {
3287 : // Find a window whose destination does not overlap any other window
3288 : uint32_t i;
3289 0 : for (i = 0; i + 1 < pluginsToMove.Length(); ++i) {
3290 0 : nsIWidget::Configuration* config = &pluginsToMove[i];
3291 0 : bool foundOverlap = false;
3292 0 : for (uint32_t j = 0; j < pluginsToMove.Length(); ++j) {
3293 0 : if (i == j)
3294 0 : continue;
3295 0 : LayoutDeviceIntRect bounds = pluginsToMove[j].mChild->GetBounds();
3296 0 : AutoTArray<LayoutDeviceIntRect,1> clipRects;
3297 0 : pluginsToMove[j].mChild->GetWindowClipRegion(&clipRects);
3298 0 : if (HasOverlap(bounds.TopLeft(), clipRects,
3299 0 : config->mBounds.TopLeft(),
3300 : config->mClipRegion)) {
3301 0 : foundOverlap = true;
3302 0 : break;
3303 : }
3304 : }
3305 0 : if (!foundOverlap)
3306 0 : break;
3307 : }
3308 : // Note that we always move the last plugin in pluginsToMove, if we
3309 : // can't find any other plugin to move
3310 0 : aConfigurations->AppendElement(pluginsToMove[i]);
3311 0 : pluginsToMove.RemoveElementAt(i);
3312 : }
3313 : }
3314 :
3315 : static void
3316 3 : PluginGetGeometryUpdate(nsTHashtable<nsRefPtrHashKey<nsIContent>>& aPlugins,
3317 : nsTArray<nsIWidget::Configuration>* aConfigurations)
3318 : {
3319 3 : for (auto iter = aPlugins.Iter(); !iter.Done(); iter.Next()) {
3320 0 : auto f = static_cast<nsPluginFrame*>(iter.Get()->GetKey()->GetPrimaryFrame());
3321 0 : if (!f) {
3322 0 : NS_WARNING("Null frame in PluginGeometryUpdate");
3323 0 : continue;
3324 : }
3325 0 : f->GetWidgetConfiguration(aConfigurations);
3326 : }
3327 3 : }
3328 :
3329 : #endif // #ifndef XP_MACOSX
3330 :
3331 : static void
3332 3 : PluginDidSetGeometry(nsTHashtable<nsRefPtrHashKey<nsIContent>>& aPlugins)
3333 : {
3334 3 : for (auto iter = aPlugins.Iter(); !iter.Done(); iter.Next()) {
3335 0 : auto f = static_cast<nsPluginFrame*>(iter.Get()->GetKey()->GetPrimaryFrame());
3336 0 : if (!f) {
3337 0 : NS_WARNING("Null frame in PluginDidSetGeometry");
3338 0 : continue;
3339 : }
3340 0 : f->DidSetWidgetGeometry();
3341 : }
3342 3 : }
3343 :
3344 : void
3345 3 : nsRootPresContext::ApplyPluginGeometryUpdates()
3346 : {
3347 : #ifndef XP_MACOSX
3348 3 : CancelApplyPluginGeometryTimer();
3349 :
3350 6 : nsTArray<nsIWidget::Configuration> configurations;
3351 3 : PluginGetGeometryUpdate(mRegisteredPlugins, &configurations);
3352 : // Walk mRegisteredPlugins and ask each plugin for its configuration
3353 3 : if (!configurations.IsEmpty()) {
3354 0 : nsIWidget* widget = configurations[0].mChild->GetParent();
3355 0 : NS_ASSERTION(widget, "Plugins must have a parent window");
3356 0 : SortConfigurations(&configurations);
3357 0 : widget->ConfigureChildren(configurations);
3358 : }
3359 : #endif // #ifndef XP_MACOSX
3360 :
3361 3 : PluginDidSetGeometry(mRegisteredPlugins);
3362 3 : }
3363 :
3364 : void
3365 2 : nsRootPresContext::CollectPluginGeometryUpdates(LayerManager* aLayerManager)
3366 : {
3367 : #ifndef XP_MACOSX
3368 : // Collect and pass plugin widget configurations down to the compositor
3369 : // for transmission to the chrome process.
3370 2 : NS_ASSERTION(aLayerManager, "layer manager is invalid!");
3371 2 : mozilla::layers::ClientLayerManager* clm = aLayerManager->AsClientLayerManager();
3372 :
3373 2 : nsTArray<nsIWidget::Configuration> configurations;
3374 : // If there aren't any plugins to configure, clear the plugin data cache
3375 : // in the layer system.
3376 2 : if (!mRegisteredPlugins.Count() && clm) {
3377 2 : clm->StorePluginWidgetConfigurations(configurations);
3378 2 : return;
3379 : }
3380 0 : PluginGetGeometryUpdate(mRegisteredPlugins, &configurations);
3381 0 : if (configurations.IsEmpty()) {
3382 0 : PluginDidSetGeometry(mRegisteredPlugins);
3383 0 : return;
3384 : }
3385 0 : SortConfigurations(&configurations);
3386 0 : if (clm) {
3387 0 : clm->StorePluginWidgetConfigurations(configurations);
3388 : }
3389 0 : PluginDidSetGeometry(mRegisteredPlugins);
3390 : #endif // #ifndef XP_MACOSX
3391 : }
3392 :
3393 : void
3394 5 : nsRootPresContext::EnsureEventualDidPaintEvent(uint64_t aTransactionId)
3395 : {
3396 5 : for (NotifyDidPaintTimer& t : mNotifyDidPaintTimers) {
3397 0 : if (t.mTransactionId == aTransactionId) {
3398 0 : return;
3399 : }
3400 : }
3401 :
3402 10 : nsCOMPtr<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1");
3403 5 : timer->SetTarget(Document()->EventTargetFor(TaskCategory::Other));
3404 5 : if (timer) {
3405 10 : RefPtr<nsRootPresContext> self = this;
3406 5 : nsresult rv = timer->InitWithCallback(
3407 24 : NewNamedTimerCallback([self, aTransactionId](){
3408 0 : nsAutoScriptBlocker blockScripts;
3409 0 : self->NotifyDidPaintForSubtree(aTransactionId);
3410 10 : }, "NotifyDidPaintForSubtree"), 100, nsITimer::TYPE_ONE_SHOT);
3411 :
3412 5 : if (NS_SUCCEEDED(rv)) {
3413 5 : NotifyDidPaintTimer* t = mNotifyDidPaintTimers.AppendElement();
3414 5 : t->mTransactionId = aTransactionId;
3415 5 : t->mTimer = timer;
3416 : }
3417 : }
3418 : }
3419 :
3420 : void
3421 27 : nsRootPresContext::CancelDidPaintTimers(uint64_t aTransactionId)
3422 : {
3423 27 : uint32_t i = 0;
3424 37 : while (i < mNotifyDidPaintTimers.Length()) {
3425 5 : if (mNotifyDidPaintTimers[i].mTransactionId <= aTransactionId) {
3426 4 : mNotifyDidPaintTimers[i].mTimer->Cancel();
3427 4 : mNotifyDidPaintTimers.RemoveElementAt(i);
3428 : } else {
3429 1 : i++;
3430 : }
3431 : }
3432 27 : }
3433 :
3434 : void
3435 8 : nsRootPresContext::CancelAllDidPaintTimers()
3436 : {
3437 8 : for (uint32_t i = 0; i < mNotifyDidPaintTimers.Length(); i++) {
3438 0 : mNotifyDidPaintTimers[i].mTimer->Cancel();
3439 : }
3440 8 : mNotifyDidPaintTimers.Clear();
3441 8 : }
3442 :
3443 : void
3444 11 : nsRootPresContext::AddWillPaintObserver(nsIRunnable* aRunnable)
3445 : {
3446 11 : if (!mWillPaintFallbackEvent.IsPending()) {
3447 3 : mWillPaintFallbackEvent = new RunWillPaintObservers(this);
3448 9 : Document()->Dispatch("RunWillPaintObservers",
3449 : TaskCategory::Other,
3450 9 : do_AddRef(mWillPaintFallbackEvent.get()));
3451 : }
3452 11 : mWillPaintObservers.AppendElement(aRunnable);
3453 11 : }
3454 :
3455 : /**
3456 : * Run all runnables that need to get called before the next paint.
3457 : */
3458 : void
3459 52 : nsRootPresContext::FlushWillPaintObservers()
3460 : {
3461 52 : mWillPaintFallbackEvent = nullptr;
3462 104 : nsTArray<nsCOMPtr<nsIRunnable> > observers;
3463 52 : observers.SwapElements(mWillPaintObservers);
3464 63 : for (uint32_t i = 0; i < observers.Length(); ++i) {
3465 11 : observers[i]->Run();
3466 : }
3467 52 : }
3468 :
3469 : size_t
3470 21 : nsRootPresContext::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
3471 : {
3472 21 : return nsPresContext::SizeOfExcludingThis(aMallocSizeOf);
3473 :
3474 : // Measurement of the following members may be added later if DMD finds it is
3475 : // worthwhile:
3476 : // - mNotifyDidPaintTimer
3477 : // - mRegisteredPlugins
3478 : // - mWillPaintObservers
3479 : // - mWillPaintFallbackEvent
3480 : }
|
