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1 /* | 1 /* |
2 * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org> | 2 * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org> |
3 * 1999 Lars Knoll <knoll@kde.org> | 3 * 1999 Lars Knoll <knoll@kde.org> |
4 * 1999 Antti Koivisto <koivisto@kde.org> | 4 * 1999 Antti Koivisto <koivisto@kde.org> |
5 * 2000 Dirk Mueller <mueller@kde.org> | 5 * 2000 Dirk Mueller <mueller@kde.org> |
6 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. | 6 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
7 * (C) 2006 Graham Dennis (graham.dennis@gmail.com) | 7 * (C) 2006 Graham Dennis (graham.dennis@gmail.com) |
8 * (C) 2006 Alexey Proskuryakov (ap@nypop.com) | 8 * (C) 2006 Alexey Proskuryakov (ap@nypop.com) |
9 * Copyright (C) 2009 Google Inc. All rights reserved. | 9 * Copyright (C) 2009 Google Inc. All rights reserved. |
10 * | 10 * |
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26 | 26 |
27 #include "core/frame/FrameView.h" | 27 #include "core/frame/FrameView.h" |
28 | 28 |
29 #include "core/HTMLNames.h" | 29 #include "core/HTMLNames.h" |
30 #include "core/MediaTypeNames.h" | 30 #include "core/MediaTypeNames.h" |
31 #include "core/animation/DocumentAnimations.h" | 31 #include "core/animation/DocumentAnimations.h" |
32 #include "core/css/FontFaceSet.h" | 32 #include "core/css/FontFaceSet.h" |
33 #include "core/css/resolver/StyleResolver.h" | 33 #include "core/css/resolver/StyleResolver.h" |
34 #include "core/dom/AXObjectCache.h" | 34 #include "core/dom/AXObjectCache.h" |
35 #include "core/dom/DOMNodeIds.h" | 35 #include "core/dom/DOMNodeIds.h" |
36 #include "core/dom/ElementVisibilityObserver.h" | |
36 #include "core/dom/Fullscreen.h" | 37 #include "core/dom/Fullscreen.h" |
38 #include "core/dom/IntersectionObserverCallback.h" | |
37 #include "core/dom/IntersectionObserverController.h" | 39 #include "core/dom/IntersectionObserverController.h" |
40 #include "core/dom/IntersectionObserverInit.h" | |
38 #include "core/editing/EditingUtilities.h" | 41 #include "core/editing/EditingUtilities.h" |
39 #include "core/editing/FrameSelection.h" | 42 #include "core/editing/FrameSelection.h" |
40 #include "core/editing/RenderedPosition.h" | 43 #include "core/editing/RenderedPosition.h" |
41 #include "core/editing/markers/DocumentMarkerController.h" | 44 #include "core/editing/markers/DocumentMarkerController.h" |
42 #include "core/events/ErrorEvent.h" | 45 #include "core/events/ErrorEvent.h" |
43 #include "core/fetch/ResourceFetcher.h" | 46 #include "core/fetch/ResourceFetcher.h" |
44 #include "core/frame/EventHandlerRegistry.h" | 47 #include "core/frame/EventHandlerRegistry.h" |
45 #include "core/frame/FrameHost.h" | 48 #include "core/frame/FrameHost.h" |
46 #include "core/frame/LocalFrame.h" | 49 #include "core/frame/LocalFrame.h" |
47 #include "core/frame/Location.h" | 50 #include "core/frame/Location.h" |
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146 static bool s_initialTrackAllPaintInvalidations = false; | 149 static bool s_initialTrackAllPaintInvalidations = false; |
147 | 150 |
148 FrameView::FrameView(LocalFrame* frame) | 151 FrameView::FrameView(LocalFrame* frame) |
149 : m_frame(frame), | 152 : m_frame(frame), |
150 m_displayMode(WebDisplayModeBrowser), | 153 m_displayMode(WebDisplayModeBrowser), |
151 m_canHaveScrollbars(true), | 154 m_canHaveScrollbars(true), |
152 m_hasPendingLayout(false), | 155 m_hasPendingLayout(false), |
153 m_inSynchronousPostLayout(false), | 156 m_inSynchronousPostLayout(false), |
154 m_postLayoutTasksTimer(this, &FrameView::postLayoutTimerFired), | 157 m_postLayoutTasksTimer(this, &FrameView::postLayoutTimerFired), |
155 m_updateWidgetsTimer(this, &FrameView::updateWidgetsTimerFired), | 158 m_updateWidgetsTimer(this, &FrameView::updateWidgetsTimerFired), |
156 m_renderThrottlingObserverNotificationFactory( | |
157 CancellableTaskFactory::create( | |
158 this, | |
159 &FrameView::notifyRenderThrottlingObservers)), | |
160 m_isTransparent(false), | 159 m_isTransparent(false), |
161 m_baseBackgroundColor(Color::white), | 160 m_baseBackgroundColor(Color::white), |
162 m_mediaType(MediaTypeNames::screen), | 161 m_mediaType(MediaTypeNames::screen), |
163 m_safeToPropagateScrollToParent(true), | 162 m_safeToPropagateScrollToParent(true), |
164 m_scrollCorner(nullptr), | 163 m_scrollCorner(nullptr), |
165 m_stickyPositionObjectCount(0), | 164 m_stickyPositionObjectCount(0), |
166 m_inputEventsScaleFactorForEmulation(1), | 165 m_inputEventsScaleFactorForEmulation(1), |
167 m_layoutSizeFixedToFrameSize(true), | 166 m_layoutSizeFixedToFrameSize(true), |
168 m_didScrollTimer(this, &FrameView::didScrollTimerFired), | 167 m_didScrollTimer(this, &FrameView::didScrollTimerFired), |
169 m_topControlsViewportAdjustment(0), | 168 m_topControlsViewportAdjustment(0), |
170 m_needsUpdateWidgetGeometries(false), | 169 m_needsUpdateWidgetGeometries(false), |
171 m_needsUpdateViewportIntersection(true), | 170 m_needsUpdateViewportIntersection(true), |
172 m_needsUpdateViewportIntersectionInSubtree(true), | |
173 #if ENABLE(ASSERT) | 171 #if ENABLE(ASSERT) |
174 m_hasBeenDisposed(false), | 172 m_hasBeenDisposed(false), |
175 #endif | 173 #endif |
176 m_horizontalScrollbarMode(ScrollbarAuto), | 174 m_horizontalScrollbarMode(ScrollbarAuto), |
177 m_verticalScrollbarMode(ScrollbarAuto), | 175 m_verticalScrollbarMode(ScrollbarAuto), |
178 m_horizontalScrollbarLock(false), | 176 m_horizontalScrollbarLock(false), |
179 m_verticalScrollbarLock(false), | 177 m_verticalScrollbarLock(false), |
180 m_scrollbarsSuppressed(false), | 178 m_scrollbarsSuppressed(false), |
181 m_inUpdateScrollbars(false), | 179 m_inUpdateScrollbars(false), |
182 m_frameTimingRequestsDirty(true), | 180 m_frameTimingRequestsDirty(true), |
183 m_viewportIntersectionValid(false), | |
184 m_hiddenForThrottling(false), | 181 m_hiddenForThrottling(false), |
185 m_crossOriginForThrottling(false), | |
186 m_subtreeThrottled(false), | 182 m_subtreeThrottled(false), |
187 m_currentUpdateLifecyclePhasesTargetState( | 183 m_currentUpdateLifecyclePhasesTargetState( |
188 DocumentLifecycle::Uninitialized), | 184 DocumentLifecycle::Uninitialized), |
189 m_scrollAnchor(this), | 185 m_scrollAnchor(this), |
190 m_needsScrollbarsUpdate(false), | 186 m_needsScrollbarsUpdate(false), |
191 m_suppressAdjustViewSize(false), | 187 m_suppressAdjustViewSize(false), |
192 m_allowsLayoutInvalidationAfterLayoutClean(true) { | 188 m_allowsLayoutInvalidationAfterLayoutClean(true) { |
193 ASSERT(m_frame); | 189 ASSERT(m_frame); |
194 init(); | 190 init(); |
195 } | 191 } |
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216 DEFINE_TRACE(FrameView) { | 212 DEFINE_TRACE(FrameView) { |
217 visitor->trace(m_frame); | 213 visitor->trace(m_frame); |
218 visitor->trace(m_fragmentAnchor); | 214 visitor->trace(m_fragmentAnchor); |
219 visitor->trace(m_scrollableAreas); | 215 visitor->trace(m_scrollableAreas); |
220 visitor->trace(m_animatingScrollableAreas); | 216 visitor->trace(m_animatingScrollableAreas); |
221 visitor->trace(m_autoSizeInfo); | 217 visitor->trace(m_autoSizeInfo); |
222 visitor->trace(m_horizontalScrollbar); | 218 visitor->trace(m_horizontalScrollbar); |
223 visitor->trace(m_verticalScrollbar); | 219 visitor->trace(m_verticalScrollbar); |
224 visitor->trace(m_children); | 220 visitor->trace(m_children); |
225 visitor->trace(m_viewportScrollableArea); | 221 visitor->trace(m_viewportScrollableArea); |
222 visitor->trace(m_visibilityObserver); | |
226 visitor->trace(m_scrollAnchor); | 223 visitor->trace(m_scrollAnchor); |
227 Widget::trace(visitor); | 224 Widget::trace(visitor); |
228 ScrollableArea::trace(visitor); | 225 ScrollableArea::trace(visitor); |
229 } | 226 } |
230 | 227 |
231 void FrameView::reset() { | 228 void FrameView::reset() { |
232 m_hasPendingLayout = false; | 229 m_hasPendingLayout = false; |
233 m_layoutSchedulingEnabled = true; | 230 m_layoutSchedulingEnabled = true; |
234 m_inSynchronousPostLayout = false; | 231 m_inSynchronousPostLayout = false; |
235 m_layoutCount = 0; | 232 m_layoutCount = 0; |
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276 reset(); | 273 reset(); |
277 | 274 |
278 m_size = LayoutSize(); | 275 m_size = LayoutSize(); |
279 | 276 |
280 // Propagate the marginwidth/height and scrolling modes to the view. | 277 // Propagate the marginwidth/height and scrolling modes to the view. |
281 if (m_frame->owner() && | 278 if (m_frame->owner() && |
282 m_frame->owner()->scrollingMode() == ScrollbarAlwaysOff) | 279 m_frame->owner()->scrollingMode() == ScrollbarAlwaysOff) |
283 setCanHaveScrollbars(false); | 280 setCanHaveScrollbars(false); |
284 } | 281 } |
285 | 282 |
283 void FrameView::setupRenderThrottling() { | |
284 if (m_visibilityObserver) | |
285 return; | |
286 | |
287 // We observe the frame owner element instead of the document element, because | |
288 // if the document has no content we can falsely think the frame is invisible. | |
289 // Note that this means we cannot throttle top-level frames or (currently) | |
290 // frames whose owner element is remote. | |
291 Element* targetElement = frame().deprecatedLocalOwner(); | |
292 if (!targetElement) | |
293 return; | |
294 | |
295 m_visibilityObserver = new ElementVisibilityObserver( | |
296 targetElement, WTF::bind( | |
297 [](FrameView* frameView, bool isVisible) { | |
298 frameView->updateRenderThrottlingStatus( | |
299 !isVisible, frameView->m_subtreeThrottled); | |
300 }, | |
301 wrapWeakPersistent(this))); | |
302 m_visibilityObserver->start(); | |
303 } | |
304 | |
286 void FrameView::dispose() { | 305 void FrameView::dispose() { |
287 RELEASE_ASSERT(!isInPerformLayout()); | 306 RELEASE_ASSERT(!isInPerformLayout()); |
288 | 307 |
289 if (ScrollAnimatorBase* scrollAnimator = existingScrollAnimator()) | 308 if (ScrollAnimatorBase* scrollAnimator = existingScrollAnimator()) |
290 scrollAnimator->cancelAnimation(); | 309 scrollAnimator->cancelAnimation(); |
291 cancelProgrammaticScrollAnimation(); | 310 cancelProgrammaticScrollAnimation(); |
292 | 311 |
293 detachScrollbars(); | 312 detachScrollbars(); |
294 | 313 |
295 if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator()) | 314 if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator()) |
296 scrollingCoordinator->willDestroyScrollableArea(this); | 315 scrollingCoordinator->willDestroyScrollableArea(this); |
297 | 316 |
298 // We need to clear the RootFrameViewport's animator since it gets called | 317 // We need to clear the RootFrameViewport's animator since it gets called |
299 // from non-GC'd objects and RootFrameViewport will still have a pointer to | 318 // from non-GC'd objects and RootFrameViewport will still have a pointer to |
300 // this class. | 319 // this class. |
301 if (m_viewportScrollableArea) | 320 if (m_viewportScrollableArea) |
302 m_viewportScrollableArea->clearScrollAnimators(); | 321 m_viewportScrollableArea->clearScrollAnimators(); |
303 | 322 |
304 clearScrollAnimators(); | 323 clearScrollAnimators(); |
305 | 324 |
306 // Destroy |m_autoSizeInfo| as early as possible, to avoid dereferencing | 325 // Destroy |m_autoSizeInfo| as early as possible, to avoid dereferencing |
307 // partially destroyed |this| via |m_autoSizeInfo->m_frameView|. | 326 // partially destroyed |this| via |m_autoSizeInfo->m_frameView|. |
308 m_autoSizeInfo.clear(); | 327 m_autoSizeInfo.clear(); |
309 | 328 |
310 m_postLayoutTasksTimer.stop(); | 329 m_postLayoutTasksTimer.stop(); |
311 m_didScrollTimer.stop(); | 330 m_didScrollTimer.stop(); |
312 | 331 |
313 m_renderThrottlingObserverNotificationFactory->cancel(); | |
314 | |
315 // FIXME: Do we need to do something here for OOPI? | 332 // FIXME: Do we need to do something here for OOPI? |
316 HTMLFrameOwnerElement* ownerElement = m_frame->deprecatedLocalOwner(); | 333 HTMLFrameOwnerElement* ownerElement = m_frame->deprecatedLocalOwner(); |
317 // TODO(dcheng): It seems buggy that we can have an owner element that | 334 // TODO(dcheng): It seems buggy that we can have an owner element that |
318 // points to another Widget. | 335 // points to another Widget. |
319 if (ownerElement && ownerElement->ownedWidget() == this) | 336 if (ownerElement && ownerElement->ownedWidget() == this) |
320 ownerElement->setWidget(nullptr); | 337 ownerElement->setWidget(nullptr); |
321 | 338 |
322 #if ENABLE(ASSERT) | 339 #if ENABLE(ASSERT) |
323 m_hasBeenDisposed = true; | 340 m_hasBeenDisposed = true; |
324 #endif | 341 #endif |
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3332 } | 3349 } |
3333 | 3350 |
3334 void FrameView::setParent(Widget* parentView) { | 3351 void FrameView::setParent(Widget* parentView) { |
3335 if (parentView == parent()) | 3352 if (parentView == parent()) |
3336 return; | 3353 return; |
3337 | 3354 |
3338 Widget::setParent(parentView); | 3355 Widget::setParent(parentView); |
3339 | 3356 |
3340 updateScrollableAreaSet(); | 3357 updateScrollableAreaSet(); |
3341 setNeedsUpdateViewportIntersection(); | 3358 setNeedsUpdateViewportIntersection(); |
3359 setupRenderThrottling(); | |
3360 | |
3361 if (parentFrameView()) | |
3362 m_subtreeThrottled = parentFrameView()->canThrottleRendering(); | |
3342 } | 3363 } |
3343 | 3364 |
3344 void FrameView::removeChild(Widget* child) { | 3365 void FrameView::removeChild(Widget* child) { |
3345 ASSERT(child->parent() == this); | 3366 ASSERT(child->parent() == this); |
3346 | 3367 |
3347 if (child->isFrameView()) | 3368 if (child->isFrameView()) |
3348 removeScrollableArea(toFrameView(child)); | 3369 removeScrollableArea(toFrameView(child)); |
3349 | 3370 |
3350 child->setParent(0); | 3371 child->setParent(0); |
3351 m_children.remove(child); | 3372 m_children.remove(child); |
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4288 if (layoutObject.isText()) | 4309 if (layoutObject.isText()) |
4289 return; | 4310 return; |
4290 | 4311 |
4291 layoutObject.addAnnotatedRegions(regions); | 4312 layoutObject.addAnnotatedRegions(regions); |
4292 for (LayoutObject* curr = layoutObject.slowFirstChild(); curr; | 4313 for (LayoutObject* curr = layoutObject.slowFirstChild(); curr; |
4293 curr = curr->nextSibling()) | 4314 curr = curr->nextSibling()) |
4294 collectAnnotatedRegions(*curr, regions); | 4315 collectAnnotatedRegions(*curr, regions); |
4295 } | 4316 } |
4296 | 4317 |
4297 void FrameView::setNeedsUpdateViewportIntersection() { | 4318 void FrameView::setNeedsUpdateViewportIntersection() { |
4298 m_needsUpdateViewportIntersection = true; | |
4299 for (FrameView* parent = parentFrameView(); parent; | 4319 for (FrameView* parent = parentFrameView(); parent; |
4300 parent = parent->parentFrameView()) | 4320 parent = parent->parentFrameView()) |
4301 parent->m_needsUpdateViewportIntersectionInSubtree = true; | 4321 parent->m_needsUpdateViewportIntersectionInSubtree = true; |
4302 } | 4322 } |
4303 | 4323 |
4304 void FrameView::updateViewportIntersectionIfNeeded() { | |
4305 if (!m_needsUpdateViewportIntersection) | |
4306 return; | |
4307 m_needsUpdateViewportIntersection = false; | |
4308 m_viewportIntersectionValid = true; | |
4309 FrameView* parent = parentFrameView(); | |
4310 if (!parent) { | |
4311 HTMLFrameOwnerElement* element = frame().deprecatedLocalOwner(); | |
4312 if (!element) | |
4313 frame().document()->maybeRecordLoadReason(WouldLoadOutOfProcess); | |
4314 // Having no layout object means the frame is not drawn. | |
4315 else if (!element->layoutObject()) | |
4316 frame().document()->maybeRecordLoadReason(WouldLoadDisplayNone); | |
4317 m_viewportIntersection = frameRect(); | |
4318 return; | |
4319 } | |
4320 ASSERT(!parent->m_needsUpdateViewportIntersection); | |
4321 | |
4322 bool parentLoaded = parent->frame().document()->wouldLoadReason() > Created; | |
4323 // If the parent wasn't loaded, the children won't be either. | |
4324 if (parentLoaded) { | |
4325 if (frameRect().isEmpty()) | |
4326 frame().document()->maybeRecordLoadReason(WouldLoadZeroByZero); | |
4327 else if (frameRect().maxY() < 0) | |
4328 frame().document()->maybeRecordLoadReason(WouldLoadAbove); | |
4329 else if (frameRect().maxX() < 0) | |
4330 frame().document()->maybeRecordLoadReason(WouldLoadLeft); | |
4331 } | |
4332 | |
4333 // If our parent is hidden, then we are too. | |
4334 if (parent->m_viewportIntersection.isEmpty()) { | |
4335 m_viewportIntersection = parent->m_viewportIntersection; | |
4336 return; | |
4337 } | |
4338 | |
4339 // Transform our bounds into the root frame's content coordinate space, | |
4340 // making sure we have valid layout data in our parent document. If our | |
4341 // parent is throttled, we'll use possible stale layout information and | |
4342 // rely on the fact that another lifecycle update will be scheduled once | |
4343 // our parent becomes unthrottled. | |
4344 ASSERT(parent->lifecycle().state() >= DocumentLifecycle::LayoutClean || | |
4345 parent->shouldThrottleRendering()); | |
4346 m_viewportIntersection = parent->contentsToRootFrame(frameRect()); | |
4347 | |
4348 // TODO(skyostil): Expand the viewport to make it less likely to see stale | |
4349 // content while scrolling. | |
4350 IntRect viewport = parent->m_viewportIntersection; | |
4351 m_viewportIntersection.intersect(viewport); | |
4352 | |
4353 if (parentLoaded && !m_viewportIntersection.isEmpty()) | |
4354 frame().document()->maybeRecordLoadReason(WouldLoadVisible); | |
4355 } | |
4356 | |
4357 void FrameView::updateViewportIntersectionsForSubtree( | 4324 void FrameView::updateViewportIntersectionsForSubtree( |
4358 DocumentLifecycle::LifecycleState targetState) { | 4325 DocumentLifecycle::LifecycleState targetState) { |
4359 bool hadValidIntersection = m_viewportIntersectionValid; | |
4360 bool hadEmptyIntersection = m_viewportIntersection.isEmpty(); | |
4361 updateViewportIntersectionIfNeeded(); | |
4362 | |
4363 // Notify javascript IntersectionObservers | 4326 // Notify javascript IntersectionObservers |
4364 if (targetState == DocumentLifecycle::PaintClean && | 4327 if (targetState == DocumentLifecycle::PaintClean && |
4365 frame().document()->intersectionObserverController()) | 4328 frame().document()->intersectionObserverController()) |
4366 frame() | 4329 frame() |
4367 .document() | 4330 .document() |
4368 ->intersectionObserverController() | 4331 ->intersectionObserverController() |
4369 ->computeTrackedIntersectionObservations(); | 4332 ->computeTrackedIntersectionObservations(); |
4370 | 4333 |
4371 // Adjust render throttling for iframes based on visibility | |
4372 bool shouldNotify = !hadValidIntersection || | |
4373 hadEmptyIntersection != m_viewportIntersection.isEmpty(); | |
4374 if (shouldNotify && | |
4375 !m_renderThrottlingObserverNotificationFactory->isPending()) | |
4376 m_frame->frameScheduler()->unthrottledTaskRunner()->postTask( | |
4377 BLINK_FROM_HERE, | |
4378 m_renderThrottlingObserverNotificationFactory->cancelAndCreate()); | |
4379 | |
4380 if (!m_needsUpdateViewportIntersectionInSubtree) | 4334 if (!m_needsUpdateViewportIntersectionInSubtree) |
4381 return; | 4335 return; |
4382 m_needsUpdateViewportIntersectionInSubtree = false; | 4336 m_needsUpdateViewportIntersectionInSubtree = false; |
4383 | 4337 |
4384 for (Frame* child = m_frame->tree().firstChild(); child; | 4338 for (Frame* child = m_frame->tree().firstChild(); child; |
4385 child = child->tree().nextSibling()) { | 4339 child = child->tree().nextSibling()) { |
4386 if (!child->isLocalFrame()) | 4340 if (!child->isLocalFrame()) |
4387 continue; | 4341 continue; |
4388 if (FrameView* view = toLocalFrame(child)->view()) | 4342 if (FrameView* view = toLocalFrame(child)->view()) |
4389 view->updateViewportIntersectionsForSubtree(targetState); | 4343 view->updateViewportIntersectionsForSubtree(targetState); |
4390 } | 4344 } |
4391 } | 4345 } |
4392 | 4346 |
4393 void FrameView::updateThrottlingStatus() { | 4347 void FrameView::updateRenderThrottlingStatusForTesting() { |
4394 // Only offscreen frames can be throttled. Note that we disallow throttling | 4348 m_visibilityObserver->deliverObservationsForTesting(); |
4395 // of 0x0 frames because some sites use them to drive UI logic. | |
4396 DCHECK(m_viewportIntersectionValid); | |
4397 m_hiddenForThrottling = | |
4398 m_viewportIntersection.isEmpty() && !frameRect().isEmpty(); | |
4399 | |
4400 // We only throttle the rendering pipeline in cross-origin frames. This is | |
4401 // to avoid a situation where an ancestor frame directly depends on the | |
4402 // pipeline timing of a descendant and breaks as a result of throttling. | |
4403 // The rationale is that cross-origin frames must already communicate with | |
4404 // asynchronous messages, so they should be able to tolerate some delay in | |
4405 // receiving replies from a throttled peer. | |
4406 // | |
4407 // Check if we can access our parent's security origin. | |
4408 m_crossOriginForThrottling = false; | |
4409 // If any of our parents are throttled, we must be too. | |
4410 m_subtreeThrottled = false; | |
4411 const SecurityOrigin* origin = frame().securityContext()->getSecurityOrigin(); | |
4412 for (Frame* parentFrame = m_frame->tree().parent(); parentFrame; | |
4413 parentFrame = parentFrame->tree().parent()) { | |
4414 const SecurityOrigin* parentOrigin = | |
4415 parentFrame->securityContext()->getSecurityOrigin(); | |
4416 if (!origin->canAccess(parentOrigin)) | |
4417 m_crossOriginForThrottling = true; | |
4418 if (parentFrame->isLocalFrame() && toLocalFrame(parentFrame)->view() && | |
4419 toLocalFrame(parentFrame)->view()->canThrottleRendering()) | |
4420 m_subtreeThrottled = true; | |
4421 } | |
4422 m_frame->frameScheduler()->setFrameVisible(!m_hiddenForThrottling); | |
4423 m_frame->frameScheduler()->setCrossOrigin(m_crossOriginForThrottling); | |
4424 } | 4349 } |
4425 | 4350 |
4426 void FrameView::notifyRenderThrottlingObserversForTesting() { | 4351 void FrameView::updateRenderThrottlingStatus(bool hidden, |
4427 DCHECK(m_renderThrottlingObserverNotificationFactory->isPending()); | 4352 bool subtreeThrottled) { |
4428 notifyRenderThrottlingObservers(); | 4353 TRACE_EVENT0("blink", "FrameView::updateRenderThrottlingStatus"); |
4429 } | |
4430 | |
4431 void FrameView::notifyRenderThrottlingObservers() { | |
4432 TRACE_EVENT0("blink", "FrameView::notifyRenderThrottlingObservers"); | |
4433 DCHECK(!isInPerformLayout()); | 4354 DCHECK(!isInPerformLayout()); |
4434 DCHECK(frame().document()); | 4355 DCHECK(!m_frame->document() || !m_frame->document()->inStyleRecalc()); |
4435 DCHECK(!frame().document()->inStyleRecalc()); | |
4436 bool wasThrottled = canThrottleRendering(); | 4356 bool wasThrottled = canThrottleRendering(); |
4437 | 4357 |
4438 updateThrottlingStatus(); | 4358 // Note that we disallow throttling of 0x0 frames because some sites use |
4359 // them to drive UI logic. | |
4360 m_hiddenForThrottling = hidden && !frameRect().isEmpty(); | |
4361 m_subtreeThrottled = subtreeThrottled; | |
4439 | 4362 |
4440 bool becameThrottled = !wasThrottled && canThrottleRendering(); | 4363 bool isThrottled = canThrottleRendering(); |
4441 bool becameUnthrottled = wasThrottled && !canThrottleRendering(); | 4364 bool becameUnthrottled = wasThrottled && !isThrottled; |
4365 | |
4366 // If this FrameView became unthrottled or throttled, we must make sure all | |
4367 // its children are notified synchronously. Otherwise we 1) might attempt to | |
4368 // paint one of the children with an out-of-date layout before | |
4369 // |updateRenderThrottlingStatus| has made it throttled or 2) fail to | |
4370 // unthrottle a child whose parent is unthrottled by a later notification. | |
4371 if (wasThrottled != isThrottled) { | |
4372 for (const Member<Widget>& child : *children()) { | |
4373 if (child->isFrameView()) { | |
4374 FrameView* childView = toFrameView(child); | |
4375 childView->updateRenderThrottlingStatus( | |
4376 childView->m_hiddenForThrottling, isThrottled); | |
4377 } | |
4378 } | |
4379 } | |
4380 | |
4442 ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator(); | 4381 ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator(); |
4443 if (becameThrottled) { | |
4444 // If this FrameView became throttled, we must make sure all of its | |
4445 // children become throttled at the same time. Otherwise we might | |
4446 // attempt to paint one of the children with an out-of-date layout | |
4447 // before |notifyRenderThrottlingObservers| has made it throttled. | |
4448 forAllNonThrottledFrameViews([](FrameView& frameView) { | |
4449 frameView.m_subtreeThrottled = true; | |
4450 DCHECK(frameView.canThrottleRendering()); | |
4451 }); | |
4452 } | |
4453 if (becameUnthrottled) { | 4382 if (becameUnthrottled) { |
4454 // ScrollingCoordinator needs to update according to the new throttling | 4383 // ScrollingCoordinator needs to update according to the new throttling |
4455 // status. | 4384 // status. |
4456 if (scrollingCoordinator) | 4385 if (scrollingCoordinator) |
4457 scrollingCoordinator->notifyGeometryChanged(); | 4386 scrollingCoordinator->notifyGeometryChanged(); |
4458 // Start ticking animation frames again if necessary. | 4387 // Start ticking animation frames again if necessary. |
4459 if (page()) | 4388 if (page()) |
4460 page()->animator().scheduleVisualUpdate(m_frame.get()); | 4389 page()->animator().scheduleVisualUpdate(m_frame.get()); |
4461 // Force a full repaint of this frame to ensure we are not left with a | 4390 // Force a full repaint of this frame to ensure we are not left with a |
4462 // partially painted version of this frame's contents if we skipped | 4391 // partially painted version of this frame's contents if we skipped |
4463 // painting them while the frame was throttled. | 4392 // painting them while the frame was throttled. |
4464 LayoutViewItem layoutViewItem = this->layoutViewItem(); | 4393 LayoutViewItem layoutViewItem = this->layoutViewItem(); |
4465 if (!layoutViewItem.isNull()) | 4394 if (!layoutViewItem.isNull()) |
4466 layoutViewItem.invalidatePaintForViewAndCompositedLayers(); | 4395 layoutViewItem.invalidatePaintForViewAndCompositedLayers(); |
4467 } | 4396 } |
4468 | 4397 |
4469 bool hasHandlers = m_frame->host() && | 4398 bool hasHandlers = m_frame->host() && |
4470 m_frame->host()->eventHandlerRegistry().hasEventHandlers( | 4399 m_frame->host()->eventHandlerRegistry().hasEventHandlers( |
4471 EventHandlerRegistry::TouchStartOrMoveEventBlocking); | 4400 EventHandlerRegistry::TouchStartOrMoveEventBlocking); |
4472 if (wasThrottled != canThrottleRendering() && scrollingCoordinator && | 4401 if (wasThrottled != canThrottleRendering() && scrollingCoordinator && |
4473 hasHandlers) | 4402 hasHandlers) |
4474 scrollingCoordinator->touchEventTargetRectsDidChange(); | 4403 scrollingCoordinator->touchEventTargetRectsDidChange(); |
4475 | 4404 |
4405 FrameView* parent = parentFrameView(); | |
4406 if (frame().document()->frame()) { | |
dgrogan
2016/10/25 22:29:37
Removing this doesn't cause any of the DeferredLoa
Sami
2016/10/26 17:59:35
I think I saw some unrelated tests failing because
Sami
2016/10/27 09:11:10
Yeah, turns out we do need this -- else we get cra
| |
4407 if (!parent) { | |
4408 HTMLFrameOwnerElement* element = frame().deprecatedLocalOwner(); | |
4409 if (!element) | |
4410 frame().document()->maybeRecordLoadReason(WouldLoadOutOfProcess); | |
4411 // Having no layout object means the frame is not drawn. | |
4412 else if (!element->layoutObject()) | |
4413 frame().document()->maybeRecordLoadReason(WouldLoadDisplayNone); | |
4414 } else { | |
4415 // Assume the main frame has always loaded since we don't track its | |
4416 // visibility. | |
4417 bool parentLoaded = | |
4418 !parent->parentFrameView() || | |
4419 parent->frame().document()->wouldLoadReason() > Created; | |
4420 // If the parent wasn't loaded, the children won't be either. | |
4421 if (parentLoaded) { | |
4422 if (frameRect().isEmpty()) | |
4423 frame().document()->maybeRecordLoadReason(WouldLoadZeroByZero); | |
4424 else if (frameRect().maxY() < 0) | |
4425 frame().document()->maybeRecordLoadReason(WouldLoadAbove); | |
4426 else if (frameRect().maxX() < 0) | |
4427 frame().document()->maybeRecordLoadReason(WouldLoadLeft); | |
4428 else if (!m_hiddenForThrottling) | |
4429 frame().document()->maybeRecordLoadReason(WouldLoadVisible); | |
4430 } | |
4431 } | |
4432 } | |
4433 | |
4476 #if DCHECK_IS_ON() | 4434 #if DCHECK_IS_ON() |
4477 // Make sure we never have an unthrottled frame inside a throttled one. | 4435 // Make sure we never have an unthrottled frame inside a throttled one. |
4478 FrameView* parent = parentFrameView(); | |
4479 while (parent) { | 4436 while (parent) { |
4480 DCHECK(canThrottleRendering() || !parent->canThrottleRendering()); | 4437 DCHECK(canThrottleRendering() || !parent->canThrottleRendering()); |
4481 parent = parent->parentFrameView(); | 4438 parent = parent->parentFrameView(); |
4482 } | 4439 } |
4483 #endif | 4440 #endif |
4484 } | 4441 } |
4485 | 4442 |
4486 bool FrameView::shouldThrottleRendering() const { | 4443 bool FrameView::shouldThrottleRendering() const { |
4487 return canThrottleRendering() && lifecycle().throttlingAllowed(); | 4444 return canThrottleRendering() && lifecycle().throttlingAllowed(); |
4488 } | 4445 } |
4489 | 4446 |
4490 bool FrameView::canThrottleRendering() const { | 4447 bool FrameView::canThrottleRendering() const { |
4491 if (!RuntimeEnabledFeatures::renderingPipelineThrottlingEnabled()) | 4448 if (!RuntimeEnabledFeatures::renderingPipelineThrottlingEnabled()) |
4492 return false; | 4449 return false; |
4450 // We only throttle the rendering pipeline in cross-origin frames. This is | |
4451 // to avoid a situation where an ancestor frame directly depends on the | |
4452 // pipeline timing of a descendant and breaks as a result of throttling. | |
4453 // The rationale is that cross-origin frames must already communicate with | |
4454 // asynchronous messages, so they should be able to tolerate some delay in | |
4455 // receiving replies from a throttled peer. | |
4493 return m_subtreeThrottled || | 4456 return m_subtreeThrottled || |
4494 (m_hiddenForThrottling && m_crossOriginForThrottling); | 4457 (m_hiddenForThrottling && m_frame->isCrossOriginSubframe()); |
4495 } | 4458 } |
4496 | 4459 |
4497 void FrameView::setInitialViewportSize(const IntSize& viewportSize) { | 4460 void FrameView::setInitialViewportSize(const IntSize& viewportSize) { |
4498 if (viewportSize == m_initialViewportSize) | 4461 if (viewportSize == m_initialViewportSize) |
4499 return; | 4462 return; |
4500 | 4463 |
4501 m_initialViewportSize = viewportSize; | 4464 m_initialViewportSize = viewportSize; |
4502 if (Document* document = m_frame->document()) | 4465 if (Document* document = m_frame->document()) |
4503 document->styleEngine().initialViewportChanged(); | 4466 document->styleEngine().initialViewportChanged(); |
4504 } | 4467 } |
4505 | 4468 |
4506 int FrameView::initialViewportWidth() const { | 4469 int FrameView::initialViewportWidth() const { |
4507 DCHECK(m_frame->isMainFrame()); | 4470 DCHECK(m_frame->isMainFrame()); |
4508 return m_initialViewportSize.width(); | 4471 return m_initialViewportSize.width(); |
4509 } | 4472 } |
4510 | 4473 |
4511 int FrameView::initialViewportHeight() const { | 4474 int FrameView::initialViewportHeight() const { |
4512 DCHECK(m_frame->isMainFrame()); | 4475 DCHECK(m_frame->isMainFrame()); |
4513 return m_initialViewportSize.height(); | 4476 return m_initialViewportSize.height(); |
4514 } | 4477 } |
4515 | 4478 |
4516 } // namespace blink | 4479 } // namespace blink |
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