blob: c97e3b13002a18bc5a10bfe1fff213aa15b0e13b [file] [log] [blame]
/*
* Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
* 1999 Lars Knoll <knoll@kde.org>
* 1999 Antti Koivisto <koivisto@kde.org>
* 2000 Dirk Mueller <mueller@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* (C) 2006 Graham Dennis (graham.dennis@gmail.com)
* (C) 2006 Alexey Proskuryakov (ap@nypop.com)
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "core/frame/FrameView.h"
#include "core/HTMLNames.h"
#include "core/accessibility/AXObjectCache.h"
#include "core/css/FontFaceSet.h"
#include "core/css/resolver/StyleResolver.h"
#include "core/dom/DocumentMarkerController.h"
#include "core/editing/FrameSelection.h"
#include "core/events/OverflowEvent.h"
#include "core/fetch/ResourceFetcher.h"
#include "core/fetch/ResourceLoadPriorityOptimizer.h"
#include "core/frame/FrameHost.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Settings.h"
#include "core/html/HTMLFrameElement.h"
#include "core/html/HTMLPlugInElement.h"
#include "core/html/parser/TextResourceDecoder.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "core/inspector/InspectorTraceEvents.h"
#include "core/loader/FrameLoader.h"
#include "core/loader/FrameLoaderClient.h"
#include "core/page/Chrome.h"
#include "core/page/ChromeClient.h"
#include "core/page/EventHandler.h"
#include "core/page/FocusController.h"
#include "core/page/FrameTree.h"
#include "core/page/Page.h"
#include "core/page/scrolling/ScrollingCoordinator.h"
#include "core/rendering/RenderCounter.h"
#include "core/rendering/RenderEmbeddedObject.h"
#include "core/rendering/RenderLayer.h"
#include "core/rendering/RenderListBox.h"
#include "core/rendering/RenderPart.h"
#include "core/rendering/RenderScrollbar.h"
#include "core/rendering/RenderScrollbarPart.h"
#include "core/rendering/RenderTheme.h"
#include "core/rendering/RenderView.h"
#include "core/rendering/RenderWidget.h"
#include "core/rendering/TextAutosizer.h"
#include "core/rendering/compositing/CompositedLayerMapping.h"
#include "core/rendering/compositing/RenderLayerCompositor.h"
#include "core/rendering/style/RenderStyle.h"
#include "core/rendering/svg/RenderSVGRoot.h"
#include "core/svg/SVGDocumentExtensions.h"
#include "core/svg/SVGSVGElement.h"
#include "platform/RuntimeEnabledFeatures.h"
#include "platform/ScriptForbiddenScope.h"
#include "platform/TraceEvent.h"
#include "platform/fonts/FontCache.h"
#include "platform/geometry/FloatRect.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/GraphicsLayerDebugInfo.h"
#include "platform/scroll/ScrollAnimator.h"
#include "platform/scroll/ScrollbarTheme.h"
#include "platform/text/TextStream.h"
#include "wtf/CurrentTime.h"
#include "wtf/TemporaryChange.h"
namespace blink {
using namespace HTMLNames;
double FrameView::s_currentFrameTimeStamp = 0.0;
bool FrameView::s_inPaintContents = false;
// The maximum number of updateWidgets iterations that should be done before returning.
static const unsigned maxUpdateWidgetsIterations = 2;
static const double resourcePriorityUpdateDelayAfterScroll = 0.250;
FrameView::FrameView(LocalFrame* frame)
: m_frame(frame)
, m_canHaveScrollbars(true)
, m_slowRepaintObjectCount(0)
, m_hasPendingLayout(false)
, m_layoutSubtreeRoot(0)
, m_inSynchronousPostLayout(false)
, m_postLayoutTasksTimer(this, &FrameView::postLayoutTimerFired)
, m_updateWidgetsTimer(this, &FrameView::updateWidgetsTimerFired)
, m_isTransparent(false)
, m_baseBackgroundColor(Color::white)
, m_mediaType("screen")
, m_overflowStatusDirty(true)
, m_viewportRenderer(0)
, m_wasScrolledByUser(false)
, m_inProgrammaticScroll(false)
, m_safeToPropagateScrollToParent(true)
, m_isTrackingPaintInvalidations(false)
, m_scrollCorner(nullptr)
, m_shouldAutoSize(false)
, m_inAutoSize(false)
, m_didRunAutosize(false)
, m_hasSoftwareFilters(false)
, m_visibleContentScaleFactor(1)
, m_inputEventsScaleFactorForEmulation(1)
, m_layoutSizeFixedToFrameSize(true)
, m_didScrollTimer(this, &FrameView::didScrollTimerFired)
, m_needsUpdateWidgetPositions(false)
{
ASSERT(m_frame);
init();
if (!m_frame->isMainFrame())
return;
ScrollableArea::setVerticalScrollElasticity(ScrollElasticityAllowed);
ScrollableArea::setHorizontalScrollElasticity(ScrollElasticityAllowed);
}
PassRefPtr<FrameView> FrameView::create(LocalFrame* frame)
{
RefPtr<FrameView> view = adoptRef(new FrameView(frame));
view->show();
return view.release();
}
PassRefPtr<FrameView> FrameView::create(LocalFrame* frame, const IntSize& initialSize)
{
RefPtr<FrameView> view = adoptRef(new FrameView(frame));
view->Widget::setFrameRect(IntRect(view->location(), initialSize));
view->setLayoutSizeInternal(initialSize);
view->show();
return view.release();
}
FrameView::~FrameView()
{
if (m_postLayoutTasksTimer.isActive())
m_postLayoutTasksTimer.stop();
if (m_didScrollTimer.isActive())
m_didScrollTimer.stop();
removeFromAXObjectCache();
resetScrollbars();
// Custom scrollbars should already be destroyed at this point
ASSERT(!horizontalScrollbar() || !horizontalScrollbar()->isCustomScrollbar());
ASSERT(!verticalScrollbar() || !verticalScrollbar()->isCustomScrollbar());
setHasHorizontalScrollbar(false); // Remove native scrollbars now before we lose the connection to the HostWindow.
setHasVerticalScrollbar(false);
ASSERT(!m_scrollCorner);
ASSERT(m_frame);
ASSERT(m_frame->view() != this || !m_frame->contentRenderer());
// FIXME: Do we need to do something here for OOPI?
HTMLFrameOwnerElement* ownerElement = m_frame->deprecatedLocalOwner();
if (ownerElement && ownerElement->ownedWidget() == this)
ownerElement->setWidget(nullptr);
}
void FrameView::reset()
{
m_hasPendingLayout = false;
m_layoutSubtreeRoot = 0;
m_doFullPaintInvalidation = false;
m_layoutSchedulingEnabled = true;
m_inPerformLayout = false;
m_canInvalidatePaintDuringPerformLayout = false;
m_inSynchronousPostLayout = false;
m_layoutCount = 0;
m_nestedLayoutCount = 0;
m_postLayoutTasksTimer.stop();
m_updateWidgetsTimer.stop();
m_firstLayout = true;
m_firstLayoutCallbackPending = false;
m_wasScrolledByUser = false;
m_safeToPropagateScrollToParent = true;
m_lastViewportSize = IntSize();
m_lastZoomFactor = 1.0f;
m_isTrackingPaintInvalidations = false;
m_trackedPaintInvalidationRects.clear();
m_lastPaintTime = 0;
m_paintBehavior = PaintBehaviorNormal;
m_isPainting = false;
m_visuallyNonEmptyCharacterCount = 0;
m_visuallyNonEmptyPixelCount = 0;
m_isVisuallyNonEmpty = false;
m_firstVisuallyNonEmptyLayoutCallbackPending = true;
m_maintainScrollPositionAnchor = nullptr;
m_viewportConstrainedObjects.clear();
}
void FrameView::removeFromAXObjectCache()
{
if (AXObjectCache* cache = axObjectCache())
cache->remove(this);
}
void FrameView::resetScrollbars()
{
// Reset the document's scrollbars back to our defaults before we yield the floor.
m_firstLayout = true;
setScrollbarsSuppressed(true);
if (m_canHaveScrollbars)
setScrollbarModes(ScrollbarAuto, ScrollbarAuto);
else
setScrollbarModes(ScrollbarAlwaysOff, ScrollbarAlwaysOff);
setScrollbarsSuppressed(false);
}
void FrameView::init()
{
reset();
m_size = LayoutSize();
// Propagate the marginwidth/height and scrolling modes to the view.
// FIXME: Do we need to do this for OOPI?
Element* ownerElement = m_frame->deprecatedLocalOwner();
if (ownerElement && (isHTMLFrameElement(*ownerElement) || isHTMLIFrameElement(*ownerElement))) {
HTMLFrameElementBase* frameElt = toHTMLFrameElementBase(ownerElement);
if (frameElt->scrollingMode() == ScrollbarAlwaysOff)
setCanHaveScrollbars(false);
}
}
void FrameView::prepareForDetach()
{
RELEASE_ASSERT(!isInPerformLayout());
if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
scrollAnimator->cancelAnimations();
cancelProgrammaticScrollAnimation();
detachCustomScrollbars();
// When the view is no longer associated with a frame, it needs to be removed from the ax object cache
// right now, otherwise it won't be able to reach the topDocument()'s axObject cache later.
removeFromAXObjectCache();
if (m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = m_frame->page()->scrollingCoordinator())
scrollingCoordinator->willDestroyScrollableArea(this);
}
}
void FrameView::detachCustomScrollbars()
{
Scrollbar* horizontalBar = horizontalScrollbar();
if (horizontalBar && horizontalBar->isCustomScrollbar())
setHasHorizontalScrollbar(false);
Scrollbar* verticalBar = verticalScrollbar();
if (verticalBar && verticalBar->isCustomScrollbar())
setHasVerticalScrollbar(false);
if (m_scrollCorner) {
m_scrollCorner->destroy();
m_scrollCorner = nullptr;
}
}
void FrameView::recalculateScrollbarOverlayStyle()
{
ScrollbarOverlayStyle oldOverlayStyle = scrollbarOverlayStyle();
ScrollbarOverlayStyle overlayStyle = ScrollbarOverlayStyleDefault;
Color backgroundColor = documentBackgroundColor();
// Reduce the background color from RGB to a lightness value
// and determine which scrollbar style to use based on a lightness
// heuristic.
double hue, saturation, lightness;
backgroundColor.getHSL(hue, saturation, lightness);
if (lightness <= .5)
overlayStyle = ScrollbarOverlayStyleLight;
if (oldOverlayStyle != overlayStyle)
setScrollbarOverlayStyle(overlayStyle);
}
void FrameView::clear()
{
reset();
setScrollbarsSuppressed(true);
}
bool FrameView::didFirstLayout() const
{
return !m_firstLayout;
}
void FrameView::invalidateRect(const IntRect& rect)
{
if (!parent()) {
if (HostWindow* window = hostWindow())
window->invalidateContentsAndRootView(rect);
return;
}
RenderPart* renderer = m_frame->ownerRenderer();
if (!renderer)
return;
IntRect paintInvalidationRect = rect;
paintInvalidationRect.move(renderer->borderLeft() + renderer->paddingLeft(),
renderer->borderTop() + renderer->paddingTop());
renderer->invalidatePaintRectangle(paintInvalidationRect);
}
void FrameView::setFrameRect(const IntRect& newRect)
{
IntRect oldRect = frameRect();
if (newRect == oldRect)
return;
// Autosized font sizes depend on the width of the viewing area.
bool autosizerNeedsUpdating = false;
if (newRect.width() != oldRect.width() && m_frame->isMainFrame() && m_frame->settings()->textAutosizingEnabled())
autosizerNeedsUpdating = true;
ScrollView::setFrameRect(newRect);
updateScrollableAreaSet();
if (autosizerNeedsUpdating) {
// This needs to be after the call to ScrollView::setFrameRect, because it reads the new width.
if (TextAutosizer* textAutosizer = m_frame->document()->textAutosizer())
textAutosizer->updatePageInfoInAllFrames();
}
if (RenderView* renderView = this->renderView()) {
if (renderView->usesCompositing())
renderView->compositor()->frameViewDidChangeSize();
}
viewportConstrainedVisibleContentSizeChanged(newRect.width() != oldRect.width(), newRect.height() != oldRect.height());
if (oldRect.size() != newRect.size()
&& m_frame->isMainFrame()
&& m_frame->settings()->pinchVirtualViewportEnabled())
page()->frameHost().pinchViewport().mainFrameDidChangeSize();
}
bool FrameView::scheduleAnimation()
{
if (HostWindow* window = hostWindow()) {
window->scheduleAnimation();
return true;
}
return false;
}
Page* FrameView::page() const
{
return frame().page();
}
RenderView* FrameView::renderView() const
{
return frame().contentRenderer();
}
void FrameView::setCanHaveScrollbars(bool canHaveScrollbars)
{
m_canHaveScrollbars = canHaveScrollbars;
ScrollView::setCanHaveScrollbars(canHaveScrollbars);
}
bool FrameView::shouldUseCustomScrollbars(Element*& customScrollbarElement, LocalFrame*& customScrollbarFrame)
{
customScrollbarElement = 0;
customScrollbarFrame = 0;
if (Settings* settings = m_frame->settings()) {
if (!settings->allowCustomScrollbarInMainFrame() && m_frame->isMainFrame())
return false;
}
// FIXME: We need to update the scrollbar dynamically as documents change (or as doc elements and bodies get discovered that have custom styles).
Document* doc = m_frame->document();
// Try the <body> element first as a scrollbar source.
Element* body = doc ? doc->body() : 0;
if (body && body->renderer() && body->renderer()->style()->hasPseudoStyle(SCROLLBAR)) {
customScrollbarElement = body;
return true;
}
// If the <body> didn't have a custom style, then the root element might.
Element* docElement = doc ? doc->documentElement() : 0;
if (docElement && docElement->renderer() && docElement->renderer()->style()->hasPseudoStyle(SCROLLBAR)) {
customScrollbarElement = docElement;
return true;
}
// If we have an owning ipage/LocalFrame element, then it can set the custom scrollbar also.
RenderPart* frameRenderer = m_frame->ownerRenderer();
if (frameRenderer && frameRenderer->style()->hasPseudoStyle(SCROLLBAR)) {
customScrollbarFrame = m_frame.get();
return true;
}
return false;
}
PassRefPtr<Scrollbar> FrameView::createScrollbar(ScrollbarOrientation orientation)
{
Element* customScrollbarElement = 0;
LocalFrame* customScrollbarFrame = 0;
if (shouldUseCustomScrollbars(customScrollbarElement, customScrollbarFrame))
return RenderScrollbar::createCustomScrollbar(this, orientation, customScrollbarElement, customScrollbarFrame);
// Nobody set a custom style, so we just use a native scrollbar.
return ScrollView::createScrollbar(orientation);
}
void FrameView::setContentsSize(const IntSize& size)
{
if (size == contentsSize())
return;
ScrollView::setContentsSize(size);
ScrollView::contentsResized();
Page* page = frame().page();
if (!page)
return;
updateScrollableAreaSet();
page->chrome().contentsSizeChanged(m_frame.get(), size);
}
IntPoint FrameView::clampOffsetAtScale(const IntPoint& offset, float scale) const
{
IntPoint maxScrollExtent(contentsSize().width() - scrollOrigin().x(), contentsSize().height() - scrollOrigin().y());
FloatSize scaledSize = unscaledVisibleContentSize();
if (scale)
scaledSize.scale(1 / scale);
IntPoint clampedOffset = offset;
clampedOffset = clampedOffset.shrunkTo(maxScrollExtent - expandedIntSize(scaledSize));
clampedOffset = clampedOffset.expandedTo(-scrollOrigin());
return clampedOffset;
}
void FrameView::adjustViewSize()
{
RenderView* renderView = this->renderView();
if (!renderView)
return;
ASSERT(m_frame->view() == this);
const IntRect rect = renderView->documentRect();
const IntSize& size = rect.size();
ScrollView::setScrollOrigin(IntPoint(-rect.x(), -rect.y()), !m_frame->document()->printing(), size == contentsSize());
setContentsSize(size);
}
void FrameView::applyOverflowToViewportAndSetRenderer(RenderObject* o, ScrollbarMode& hMode, ScrollbarMode& vMode)
{
// Handle the overflow:hidden/scroll case for the body/html elements. WinIE treats
// overflow:hidden and overflow:scroll on <body> as applying to the document's
// scrollbars. The CSS2.1 draft states that HTML UAs should use the <html> or <body> element and XML/XHTML UAs should
// use the root element.
EOverflow overflowX = o->style()->overflowX();
EOverflow overflowY = o->style()->overflowY();
if (o->isSVGRoot()) {
// Don't allow overflow to affect <img> and css backgrounds
if (toRenderSVGRoot(o)->isEmbeddedThroughSVGImage())
return;
// FIXME: evaluate if we can allow overflow for these cases too.
// Overflow is always hidden when stand-alone SVG documents are embedded.
if (toRenderSVGRoot(o)->isEmbeddedThroughFrameContainingSVGDocument()) {
overflowX = OHIDDEN;
overflowY = OHIDDEN;
}
}
bool ignoreOverflowHidden = false;
if (m_frame->settings()->ignoreMainFrameOverflowHiddenQuirk() && m_frame->isMainFrame())
ignoreOverflowHidden = true;
switch (overflowX) {
case OHIDDEN:
if (!ignoreOverflowHidden)
hMode = ScrollbarAlwaysOff;
break;
case OSCROLL:
hMode = ScrollbarAlwaysOn;
break;
case OAUTO:
hMode = ScrollbarAuto;
break;
default:
// Don't set it at all.
;
}
switch (overflowY) {
case OHIDDEN:
if (!ignoreOverflowHidden)
vMode = ScrollbarAlwaysOff;
break;
case OSCROLL:
vMode = ScrollbarAlwaysOn;
break;
case OAUTO:
vMode = ScrollbarAuto;
break;
default:
// Don't set it at all.
;
}
m_viewportRenderer = o;
}
void FrameView::calculateScrollbarModesForLayoutAndSetViewportRenderer(ScrollbarMode& hMode, ScrollbarMode& vMode, ScrollbarModesCalculationStrategy strategy)
{
m_viewportRenderer = 0;
// FIXME: How do we handle this for OOPI?
const HTMLFrameOwnerElement* owner = m_frame->deprecatedLocalOwner();
if (owner && (owner->scrollingMode() == ScrollbarAlwaysOff)) {
hMode = ScrollbarAlwaysOff;
vMode = ScrollbarAlwaysOff;
return;
}
if (m_canHaveScrollbars || strategy == RulesFromWebContentOnly) {
hMode = ScrollbarAuto;
vMode = ScrollbarAuto;
} else {
hMode = ScrollbarAlwaysOff;
vMode = ScrollbarAlwaysOff;
}
if (!isSubtreeLayout()) {
Document* document = m_frame->document();
Node* body = document->body();
if (isHTMLFrameSetElement(body) && body->renderer()) {
vMode = ScrollbarAlwaysOff;
hMode = ScrollbarAlwaysOff;
} else if (Element* viewportElement = document->viewportDefiningElement()) {
if (RenderObject* viewportRenderer = viewportElement->renderer()) {
if (viewportRenderer->style())
applyOverflowToViewportAndSetRenderer(viewportRenderer, hMode, vMode);
}
}
}
}
void FrameView::updateAcceleratedCompositingSettings()
{
if (RenderView* renderView = this->renderView())
renderView->compositor()->updateAcceleratedCompositingSettings();
}
void FrameView::recalcOverflowAfterStyleChange()
{
RenderView* renderView = this->renderView();
ASSERT(renderView);
if (!renderView->needsOverflowRecalcAfterStyleChange())
return;
renderView->recalcOverflowAfterStyleChange();
IntRect documentRect = renderView->documentRect();
if (scrollOrigin() == -documentRect.location() && contentsSize() == documentRect.size())
return;
if (needsLayout())
return;
InUpdateScrollbarsScope inUpdateScrollbarsScope(this);
bool shouldHaveHorizontalScrollbar = false;
bool shouldHaveVerticalScrollbar = false;
computeScrollbarExistence(shouldHaveHorizontalScrollbar, shouldHaveVerticalScrollbar, documentRect.size());
bool hasHorizontalScrollbar = horizontalScrollbar();
bool hasVerticalScrollbar = verticalScrollbar();
if (hasHorizontalScrollbar != shouldHaveHorizontalScrollbar
|| hasVerticalScrollbar != shouldHaveVerticalScrollbar) {
setNeedsLayout();
return;
}
adjustViewSize();
updateScrollbarGeometry();
}
bool FrameView::usesCompositedScrolling() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return false;
if (m_frame->settings() && m_frame->settings()->compositedScrollingForFramesEnabled())
return renderView->compositor()->inCompositingMode();
return false;
}
GraphicsLayer* FrameView::layerForScrolling() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
return renderView->compositor()->scrollLayer();
}
GraphicsLayer* FrameView::layerForHorizontalScrollbar() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
return renderView->compositor()->layerForHorizontalScrollbar();
}
GraphicsLayer* FrameView::layerForVerticalScrollbar() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
return renderView->compositor()->layerForVerticalScrollbar();
}
GraphicsLayer* FrameView::layerForScrollCorner() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
return renderView->compositor()->layerForScrollCorner();
}
bool FrameView::isEnclosedInCompositingLayer() const
{
// FIXME: It's a bug that compositing state isn't always up to date when this is called. crbug.com/366314
DisableCompositingQueryAsserts disabler;
RenderObject* frameOwnerRenderer = m_frame->ownerRenderer();
return frameOwnerRenderer && frameOwnerRenderer->enclosingLayer()->enclosingLayerForPaintInvalidationCrossingFrameBoundaries();
}
RenderObject* FrameView::layoutRoot(bool onlyDuringLayout) const
{
return onlyDuringLayout && layoutPending() ? 0 : m_layoutSubtreeRoot;
}
inline void FrameView::forceLayoutParentViewIfNeeded()
{
RenderPart* ownerRenderer = m_frame->ownerRenderer();
if (!ownerRenderer || !ownerRenderer->frame())
return;
RenderBox* contentBox = embeddedContentBox();
if (!contentBox)
return;
RenderSVGRoot* svgRoot = toRenderSVGRoot(contentBox);
if (svgRoot->everHadLayout() && !svgRoot->needsLayout())
return;
// If the embedded SVG document appears the first time, the ownerRenderer has already finished
// layout without knowing about the existence of the embedded SVG document, because RenderReplaced
// embeddedContentBox() returns 0, as long as the embedded document isn't loaded yet. Before
// bothering to lay out the SVG document, mark the ownerRenderer needing layout and ask its
// FrameView for a layout. After that the RenderEmbeddedObject (ownerRenderer) carries the
// correct size, which RenderSVGRoot::computeReplacedLogicalWidth/Height rely on, when laying
// out for the first time, or when the RenderSVGRoot size has changed dynamically (eg. via <script>).
RefPtr<FrameView> frameView = ownerRenderer->frame()->view();
// Mark the owner renderer as needing layout.
ownerRenderer->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
// Synchronously enter layout, to layout the view containing the host object/embed/iframe.
ASSERT(frameView);
frameView->layout();
}
void FrameView::performPreLayoutTasks()
{
TRACE_EVENT0("blink", "FrameView::performPreLayoutTasks");
lifecycle().advanceTo(DocumentLifecycle::InPreLayout);
// Don't schedule more layouts, we're in one.
TemporaryChange<bool> changeSchedulingEnabled(m_layoutSchedulingEnabled, false);
if (!m_nestedLayoutCount && !m_inSynchronousPostLayout && m_postLayoutTasksTimer.isActive()) {
// This is a new top-level layout. If there are any remaining tasks from the previous layout, finish them now.
m_inSynchronousPostLayout = true;
performPostLayoutTasks();
m_inSynchronousPostLayout = false;
}
Document* document = m_frame->document();
document->notifyResizeForViewportUnits();
// Viewport-dependent media queries may cause us to need completely different style information.
if (!document->styleResolver() || document->styleResolver()->mediaQueryAffectedByViewportChange()) {
document->styleResolverChanged();
document->mediaQueryAffectingValueChanged();
// FIXME: This instrumentation event is not strictly accurate since cached media query results
// do not persist across StyleResolver rebuilds.
InspectorInstrumentation::mediaQueryResultChanged(document);
} else {
document->evaluateMediaQueryList();
}
document->updateRenderTreeIfNeeded();
lifecycle().advanceTo(DocumentLifecycle::StyleClean);
}
void FrameView::performLayout(RenderObject* rootForThisLayout, bool inSubtreeLayout)
{
TRACE_EVENT0("blink", "FrameView::performLayout");
ScriptForbiddenScope forbidScript;
ASSERT(!isInPerformLayout());
lifecycle().advanceTo(DocumentLifecycle::InPerformLayout);
TemporaryChange<bool> changeInPerformLayout(m_inPerformLayout, true);
// performLayout is the actual guts of layout().
// FIXME: The 300 other lines in layout() probably belong in other helper functions
// so that a single human could understand what layout() is actually doing.
LayoutState layoutState(*rootForThisLayout);
forceLayoutParentViewIfNeeded();
// FIXME (crbug.com/256657): Do not do two layouts for text autosizing.
rootForThisLayout->layout();
gatherDebugLayoutRects(rootForThisLayout);
ResourceLoadPriorityOptimizer::resourceLoadPriorityOptimizer()->updateAllImageResourcePriorities();
lifecycle().advanceTo(DocumentLifecycle::AfterPerformLayout);
}
void FrameView::scheduleOrPerformPostLayoutTasks()
{
if (m_postLayoutTasksTimer.isActive())
return;
if (!m_inSynchronousPostLayout) {
m_inSynchronousPostLayout = true;
// Calls resumeScheduledEvents()
performPostLayoutTasks();
m_inSynchronousPostLayout = false;
}
if (!m_postLayoutTasksTimer.isActive() && (needsLayout() || m_inSynchronousPostLayout)) {
// If we need layout or are already in a synchronous call to postLayoutTasks(),
// defer widget updates and event dispatch until after we return. postLayoutTasks()
// can make us need to update again, and we can get stuck in a nasty cycle unless
// we call it through the timer here.
m_postLayoutTasksTimer.startOneShot(0, FROM_HERE);
if (needsLayout())
layout();
}
}
void FrameView::layout(bool allowSubtree)
{
// We should never layout a Document which is not in a LocalFrame.
ASSERT(m_frame);
ASSERT(m_frame->view() == this);
ASSERT(m_frame->page());
ScriptForbiddenScope forbidScript;
if (isInPerformLayout() || !m_frame->document()->isActive())
return;
TRACE_EVENT0("blink", "FrameView::layout");
TRACE_EVENT_SCOPED_SAMPLING_STATE("blink", "Layout");
// Protect the view from being deleted during layout (in recalcStyle)
RefPtr<FrameView> protector(this);
// Every scroll that happens during layout is programmatic.
TemporaryChange<bool> changeInProgrammaticScroll(m_inProgrammaticScroll, true);
m_hasPendingLayout = false;
DocumentLifecycle::Scope lifecycleScope(lifecycle(), DocumentLifecycle::LayoutClean);
RELEASE_ASSERT(!isPainting());
TRACE_EVENT_BEGIN1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "Layout", "beginData", InspectorLayoutEvent::beginData(this));
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
// FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
InspectorInstrumentationCookie cookie = InspectorInstrumentation::willLayout(m_frame.get());
if (!allowSubtree && isSubtreeLayout()) {
m_layoutSubtreeRoot->markContainingBlocksForLayout(false);
m_layoutSubtreeRoot = 0;
}
performPreLayoutTasks();
// If there is only one ref to this view left, then its going to be destroyed as soon as we exit,
// so there's no point to continuing to layout
if (protector->hasOneRef())
return;
Document* document = m_frame->document();
bool inSubtreeLayout = isSubtreeLayout();
RenderObject* rootForThisLayout = inSubtreeLayout ? m_layoutSubtreeRoot : document->renderView();
if (!rootForThisLayout) {
// FIXME: Do we need to set m_size here?
ASSERT_NOT_REACHED();
return;
}
FontCachePurgePreventer fontCachePurgePreventer;
RenderLayer* layer;
{
TemporaryChange<bool> changeSchedulingEnabled(m_layoutSchedulingEnabled, false);
m_nestedLayoutCount++;
if (!inSubtreeLayout) {
Document* document = m_frame->document();
Node* body = document->body();
if (body && body->renderer()) {
if (isHTMLFrameSetElement(*body)) {
body->renderer()->setChildNeedsLayout();
} else if (isHTMLBodyElement(*body)) {
if (!m_firstLayout && m_size.height() != layoutSize().height() && body->renderer()->enclosingBox()->stretchesToViewport())
body->renderer()->setChildNeedsLayout();
}
}
}
updateCounters();
autoSizeIfEnabled();
ScrollbarMode hMode;
ScrollbarMode vMode;
calculateScrollbarModesForLayoutAndSetViewportRenderer(hMode, vMode);
if (!inSubtreeLayout) {
// Now set our scrollbar state for the layout.
ScrollbarMode currentHMode = horizontalScrollbarMode();
ScrollbarMode currentVMode = verticalScrollbarMode();
if (m_firstLayout) {
setScrollbarsSuppressed(true);
m_doFullPaintInvalidation = true;
m_firstLayout = false;
m_firstLayoutCallbackPending = true;
m_lastViewportSize = layoutSize(IncludeScrollbars);
m_lastZoomFactor = rootForThisLayout->style()->zoom();
// Set the initial vMode to AlwaysOn if we're auto.
if (vMode == ScrollbarAuto)
setVerticalScrollbarMode(ScrollbarAlwaysOn); // This causes a vertical scrollbar to appear.
// Set the initial hMode to AlwaysOff if we're auto.
if (hMode == ScrollbarAuto)
setHorizontalScrollbarMode(ScrollbarAlwaysOff); // This causes a horizontal scrollbar to disappear.
setScrollbarModes(hMode, vMode);
setScrollbarsSuppressed(false, true);
} else if (hMode != currentHMode || vMode != currentVMode) {
setScrollbarModes(hMode, vMode);
}
LayoutSize oldSize = m_size;
m_size = LayoutSize(layoutSize().width(), layoutSize().height());
if (oldSize != m_size && !m_firstLayout) {
RenderBox* rootRenderer = document->documentElement() ? document->documentElement()->renderBox() : 0;
RenderBox* bodyRenderer = rootRenderer && document->body() ? document->body()->renderBox() : 0;
if (bodyRenderer && bodyRenderer->stretchesToViewport())
bodyRenderer->setChildNeedsLayout();
else if (rootRenderer && rootRenderer->stretchesToViewport())
rootRenderer->setChildNeedsLayout();
}
// We need to set m_doFullPaintInvalidation before triggering layout as RenderObject::checkForPaintInvalidation
// checks the boolean to disable local paint invalidations.
m_doFullPaintInvalidation |= renderView()->shouldDoFullPaintInvalidationForNextLayout();
}
layer = rootForThisLayout->enclosingLayer();
performLayout(rootForThisLayout, inSubtreeLayout);
m_layoutSubtreeRoot = 0;
// We need to ensure that we mark up all renderers up to the RenderView
// for paint invalidation. This simplifies our code as we just always
// do a full tree walk.
if (RenderObject* container = rootForThisLayout->container())
container->setMayNeedPaintInvalidation(true);
} // Reset m_layoutSchedulingEnabled to its previous value.
if (!inSubtreeLayout && !toRenderView(rootForThisLayout)->document().printing())
adjustViewSize();
layer->updateLayerPositionsAfterLayout();
if (m_doFullPaintInvalidation)
renderView()->compositor()->fullyInvalidatePaint();
renderView()->compositor()->didLayout();
m_layoutCount++;
if (AXObjectCache* cache = rootForThisLayout->document().axObjectCache()) {
const KURL& url = rootForThisLayout->document().url();
if (url.isValid() && !url.isAboutBlankURL())
cache->handleLayoutComplete(rootForThisLayout);
}
updateAnnotatedRegions();
ASSERT(!rootForThisLayout->needsLayout());
if (document->hasListenerType(Document::OVERFLOWCHANGED_LISTENER))
updateOverflowStatus(layoutSize().width() < contentsWidth(), layoutSize().height() < contentsHeight());
scheduleOrPerformPostLayoutTasks();
TRACE_EVENT_END1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "Layout", "endData", InspectorLayoutEvent::endData(rootForThisLayout));
// FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
InspectorInstrumentation::didLayout(cookie, rootForThisLayout);
m_nestedLayoutCount--;
if (m_nestedLayoutCount)
return;
#if ENABLE(ASSERT)
// Post-layout assert that nobody was re-marked as needing layout during layout.
document->renderView()->assertSubtreeIsLaidOut();
#endif
// FIXME: It should be not possible to remove the FrameView from the frame/page during layout
// however m_inPerformLayout is not set for most of this function, so none of our RELEASE_ASSERTS
// in LocalFrame/Page will fire. One of the post-layout tasks is disconnecting the LocalFrame from
// the page in fast/frames/crash-remove-iframe-during-object-beforeload-2.html
// necessitating this check here.
// ASSERT(frame()->page());
if (frame().page())
frame().page()->chrome().client().layoutUpdated(m_frame.get());
}
// The plan is to move to compositor-queried paint invalidation, in which case this
// method would setNeedsRedraw on the GraphicsLayers with invalidations and
// let the compositor pick which to actually draw.
// See http://crbug.com/306706
void FrameView::invalidateTreeIfNeeded()
{
RenderObject* rootForPaintInvalidation = renderView();
ASSERT(!rootForPaintInvalidation->needsLayout());
TRACE_EVENT1("blink", "FrameView::invalidateTree", "root", rootForPaintInvalidation->debugName().ascii());
PaintInvalidationState rootPaintInvalidationState(*rootForPaintInvalidation);
rootForPaintInvalidation->invalidateTreeIfNeeded(rootPaintInvalidationState);
// Invalidate the paint of the frameviews scrollbars if needed
if (hasVerticalBarDamage())
invalidateRect(verticalBarDamage());
if (hasHorizontalBarDamage())
invalidateRect(horizontalBarDamage());
resetScrollbarDamage();
m_doFullPaintInvalidation = false;
#ifndef NDEBUG
renderView()->assertSubtreeClearedPaintInvalidationState();
#endif
if (m_frame->selection().isCaretBoundsDirty())
m_frame->selection().invalidateCaretRect();
}
DocumentLifecycle& FrameView::lifecycle() const
{
return m_frame->document()->lifecycle();
}
void FrameView::gatherDebugLayoutRects(RenderObject* layoutRoot)
{
bool isTracing;
TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT("blink.debug.layout"), &isTracing);
if (!isTracing)
return;
if (!layoutRoot->enclosingLayer()->hasCompositedLayerMapping())
return;
// For access to compositedLayerMapping().
DisableCompositingQueryAsserts disabler;
GraphicsLayer* graphicsLayer = layoutRoot->enclosingLayer()->compositedLayerMapping()->mainGraphicsLayer();
if (!graphicsLayer)
return;
GraphicsLayerDebugInfo& debugInfo = graphicsLayer->debugInfo();
debugInfo.currentLayoutRects().clear();
for (RenderObject* renderer = layoutRoot; renderer; renderer = renderer->nextInPreOrder()) {
if (renderer->layoutDidGetCalled()) {
FloatQuad quad = renderer->localToAbsoluteQuad(FloatQuad(renderer->previousPaintInvalidationRect()));
LayoutRect rect = quad.enclosingBoundingBox();
debugInfo.currentLayoutRects().append(rect);
renderer->setLayoutDidGetCalled(false);
}
}
}
RenderBox* FrameView::embeddedContentBox() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
RenderObject* firstChild = renderView->firstChild();
if (!firstChild || !firstChild->isBox())
return 0;
// Curently only embedded SVG documents participate in the size-negotiation logic.
if (firstChild->isSVGRoot())
return toRenderBox(firstChild);
return 0;
}
void FrameView::addWidget(RenderWidget* object)
{
m_widgets.add(object);
}
void FrameView::removeWidget(RenderWidget* object)
{
m_widgets.remove(object);
}
void FrameView::updateWidgetPositions()
{
WillBeHeapVector<RefPtrWillBeMember<RenderWidget> > widgets;
copyToVector(m_widgets, widgets);
// Script or plugins could detach the frame so abort processing if that happens.
for (size_t i = 0; i < widgets.size() && renderView(); ++i)
widgets[i]->updateWidgetPosition();
for (size_t i = 0; i < widgets.size() && renderView(); ++i)
widgets[i]->widgetPositionsUpdated();
}
void FrameView::addWidgetToUpdate(RenderEmbeddedObject& object)
{
ASSERT(isInPerformLayout());
// Tell the DOM element that it needs a widget update.
Node* node = object.node();
ASSERT(node);
if (isHTMLObjectElement(*node) || isHTMLEmbedElement(*node))
toHTMLPlugInElement(node)->setNeedsWidgetUpdate(true);
m_widgetUpdateSet.add(&object);
}
void FrameView::setMediaType(const AtomicString& mediaType)
{
ASSERT(m_frame->document());
m_frame->document()->mediaQueryAffectingValueChanged();
m_mediaType = mediaType;
}
AtomicString FrameView::mediaType() const
{
// See if we have an override type.
String overrideType;
InspectorInstrumentation::applyEmulatedMedia(m_frame.get(), &overrideType);
if (!overrideType.isNull())
return AtomicString(overrideType);
return m_mediaType;
}
void FrameView::adjustMediaTypeForPrinting(bool printing)
{
if (printing) {
if (m_mediaTypeWhenNotPrinting.isNull())
m_mediaTypeWhenNotPrinting = mediaType();
setMediaType("print");
} else {
if (!m_mediaTypeWhenNotPrinting.isNull())
setMediaType(m_mediaTypeWhenNotPrinting);
m_mediaTypeWhenNotPrinting = nullAtom;
}
}
bool FrameView::contentsInCompositedLayer() const
{
RenderView* renderView = this->renderView();
if (renderView && renderView->compositingState() == PaintsIntoOwnBacking) {
GraphicsLayer* layer = renderView->layer()->compositedLayerMapping()->mainGraphicsLayer();
if (layer && layer->drawsContent())
return true;
}
return false;
}
void FrameView::addSlowRepaintObject()
{
if (!m_slowRepaintObjectCount++) {
if (Page* page = m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
scrollingCoordinator->frameViewHasSlowRepaintObjectsDidChange(this);
}
}
}
void FrameView::removeSlowRepaintObject()
{
ASSERT(m_slowRepaintObjectCount > 0);
m_slowRepaintObjectCount--;
if (!m_slowRepaintObjectCount) {
if (Page* page = m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
scrollingCoordinator->frameViewHasSlowRepaintObjectsDidChange(this);
}
}
}
void FrameView::addViewportConstrainedObject(RenderObject* object)
{
if (!m_viewportConstrainedObjects)
m_viewportConstrainedObjects = adoptPtr(new ViewportConstrainedObjectSet);
if (!m_viewportConstrainedObjects->contains(object)) {
m_viewportConstrainedObjects->add(object);
if (Page* page = m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
scrollingCoordinator->frameViewFixedObjectsDidChange(this);
}
}
}
void FrameView::removeViewportConstrainedObject(RenderObject* object)
{
if (m_viewportConstrainedObjects && m_viewportConstrainedObjects->contains(object)) {
m_viewportConstrainedObjects->remove(object);
if (Page* page = m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
scrollingCoordinator->frameViewFixedObjectsDidChange(this);
}
}
}
LayoutRect FrameView::viewportConstrainedVisibleContentRect() const
{
LayoutRect viewportRect = visibleContentRect();
// Ignore overhang. No-op when not using rubber banding.
viewportRect.setLocation(clampScrollPosition(scrollPosition()));
return viewportRect;
}
void FrameView::viewportConstrainedVisibleContentSizeChanged(bool widthChanged, bool heightChanged)
{
if (!hasViewportConstrainedObjects())
return;
// If viewport is not enabled, frameRect change will cause layout size change and then layout.
// Otherwise, viewport constrained objects need their layout flags set separately to ensure
// they are positioned correctly. In the virtual-viewport pinch mode frame rect changes wont
// necessarily cause a layout size change so only take this early-out if we're in old-style
// pinch.
if (m_frame->settings()
&& !m_frame->settings()->viewportEnabled()
&& !m_frame->settings()->pinchVirtualViewportEnabled())
return;
ViewportConstrainedObjectSet::const_iterator end = m_viewportConstrainedObjects->end();
for (ViewportConstrainedObjectSet::const_iterator it = m_viewportConstrainedObjects->begin(); it != end; ++it) {
RenderObject* renderer = *it;
RenderStyle* style = renderer->style();
if (widthChanged) {
if (style->width().isFixed() && (style->left().isAuto() || style->right().isAuto()))
renderer->setNeedsPositionedMovementLayout();
else
renderer->setNeedsLayoutAndFullPaintInvalidation();
}
if (heightChanged) {
if (style->height().isFixed() && (style->top().isAuto() || style->bottom().isAuto()))
renderer->setNeedsPositionedMovementLayout();
else
renderer->setNeedsLayoutAndFullPaintInvalidation();
}
}
}
IntSize FrameView::scrollOffsetForFixedPosition() const
{
return toIntSize(clampScrollPosition(scrollPosition()));
}
IntPoint FrameView::lastKnownMousePosition() const
{
return m_frame->eventHandler().lastKnownMousePosition();
}
bool FrameView::shouldSetCursor() const
{
Page* page = frame().page();
return page && page->visibilityState() != PageVisibilityStateHidden && page->focusController().isActive() && page->settings().deviceSupportsMouse();
}
void FrameView::scrollContentsIfNeededRecursive()
{
scrollContentsIfNeeded();
for (Frame* child = m_frame->tree().firstChild(); child; child = child->tree().nextSibling()) {
if (!child->isLocalFrame())
continue;
if (FrameView* view = toLocalFrame(child)->view())
view->scrollContentsIfNeededRecursive();
}
}
void FrameView::scrollContentsIfNeeded()
{
bool didScroll = !pendingScrollDelta().isZero();
ScrollView::scrollContentsIfNeeded();
if (didScroll)
updateFixedElementPaintInvalidationRectsAfterScroll();
}
bool FrameView::scrollContentsFastPath(const IntSize& scrollDelta, const IntRect& rectToScroll)
{
if (!contentsInCompositedLayer() || hasSlowRepaintObjects())
return false;
if (!m_viewportConstrainedObjects || m_viewportConstrainedObjects->isEmpty()) {
hostWindow()->scroll();
return true;
}
// Get the rects of the fixed objects visible in the rectToScroll
Region regionToUpdate;
ViewportConstrainedObjectSet::const_iterator end = m_viewportConstrainedObjects->end();
for (ViewportConstrainedObjectSet::const_iterator it = m_viewportConstrainedObjects->begin(); it != end; ++it) {
RenderObject* renderer = *it;
ASSERT(renderer->style()->hasViewportConstrainedPosition());
ASSERT(renderer->hasLayer());
RenderLayer* layer = toRenderBoxModelObject(renderer)->layer();
CompositingState state = layer->compositingState();
if (state == PaintsIntoOwnBacking || state == PaintsIntoGroupedBacking)
continue;
if (layer->subtreeIsInvisible())
continue;
// If the fixed layer has a blur/drop-shadow filter applied on at least one of its parents, we cannot
// scroll using the fast path, otherwise the outsets of the filter will be moved around the page.
if (layer->hasAncestorWithFilterOutsets())
return false;
IntRect updateRect = pixelSnappedIntRect(layer->paintInvalidator().repaintRectIncludingNonCompositingDescendants());
const RenderLayerModelObject* repaintContainer = layer->renderer()->containerForPaintInvalidation();
if (repaintContainer && !repaintContainer->isRenderView()) {
// Invalidate the old and new locations of fixed position elements that are not drawn into the RenderView.
updateRect.moveBy(scrollPosition());
IntRect previousRect = updateRect;
previousRect.move(scrollDelta);
// FIXME: Rather than uniting the rects, we should just issue both invalidations.
updateRect.unite(previousRect);
layer->renderer()->invalidatePaintUsingContainer(repaintContainer, updateRect, InvalidationScroll);
} else {
// Coalesce the paint invalidations that will be issued to the renderView.
updateRect = contentsToRootView(updateRect);
if (!updateRect.isEmpty())
regionToUpdate.unite(updateRect);
}
}
hostWindow()->scroll();
// Invalidate the old and new locations of fixed position elements that are drawn into the RenderView.
Vector<IntRect> subRectsToUpdate = regionToUpdate.rects();
size_t viewportConstrainedObjectsCount = subRectsToUpdate.size();
for (size_t i = 0; i < viewportConstrainedObjectsCount; ++i) {
IntRect updateRect = subRectsToUpdate[i];
IntRect scrolledRect = updateRect;
scrolledRect.move(-scrollDelta);
updateRect.unite(scrolledRect);
// FIXME: We should be able to issue these invalidations separately and before we actually scroll.
renderView()->layer()->paintInvalidator().setBackingNeedsRepaintInRect(rootViewToContents(updateRect));
}
return true;
}
void FrameView::scrollContentsSlowPath(const IntRect& updateRect)
{
if (contentsInCompositedLayer()) {
IntRect updateRect = visibleContentRect();
ASSERT(renderView());
renderView()->layer()->paintInvalidator().setBackingNeedsRepaintInRect(updateRect);
}
if (RenderPart* frameRenderer = m_frame->ownerRenderer()) {
if (isEnclosedInCompositingLayer()) {
LayoutRect rect(frameRenderer->borderLeft() + frameRenderer->paddingLeft(),
frameRenderer->borderTop() + frameRenderer->paddingTop(),
visibleWidth(), visibleHeight());
frameRenderer->invalidatePaintRectangle(rect);
return;
}
}
ScrollView::scrollContentsSlowPath(updateRect);
}
void FrameView::restoreScrollbar()
{
setScrollbarsSuppressed(false);
}
bool FrameView::scrollToFragment(const KURL& url)
{
// If our URL has no ref, then we have no place we need to jump to.
// OTOH If CSS target was set previously, we want to set it to 0, recalc
// and possibly paint invalidation because :target pseudo class may have been
// set (see bug 11321).
if (!url.hasFragmentIdentifier() && !m_frame->document()->cssTarget())
return false;
String fragmentIdentifier = url.fragmentIdentifier();
if (scrollToAnchor(fragmentIdentifier))
return true;
// Try again after decoding the ref, based on the document's encoding.
if (m_frame->document()->encoding().isValid())
return scrollToAnchor(decodeURLEscapeSequences(fragmentIdentifier, m_frame->document()->encoding()));
return false;
}
bool FrameView::scrollToAnchor(const String& name)
{
ASSERT(m_frame->document());
if (!m_frame->document()->isRenderingReady()) {
m_frame->document()->setGotoAnchorNeededAfterStylesheetsLoad(true);
return false;
}
m_frame->document()->setGotoAnchorNeededAfterStylesheetsLoad(false);
Element* anchorNode = m_frame->document()->findAnchor(name);
// Setting to null will clear the current target.
m_frame->document()->setCSSTarget(anchorNode);
if (m_frame->document()->isSVGDocument()) {
if (SVGSVGElement* svg = SVGDocumentExtensions::rootElement(*m_frame->document())) {
svg->setupInitialView(name, anchorNode);
if (!anchorNode)
return true;
}
}
// Implement the rule that "" and "top" both mean top of page as in other browsers.
if (!anchorNode && !(name.isEmpty() || equalIgnoringCase(name, "top")))
return false;
maintainScrollPositionAtAnchor(anchorNode ? static_cast<Node*>(anchorNode) : m_frame->document());
// If the anchor accepts keyboard focus, move focus there to aid users relying on keyboard navigation.
if (anchorNode && anchorNode->isFocusable())
m_frame->document()->setFocusedElement(anchorNode);
return true;
}
void FrameView::maintainScrollPositionAtAnchor(Node* anchorNode)
{
m_maintainScrollPositionAnchor = anchorNode;
if (!m_maintainScrollPositionAnchor)
return;
// We need to update the layout before scrolling, otherwise we could
// really mess things up if an anchor scroll comes at a bad moment.
m_frame->document()->updateRenderTreeIfNeeded();
// Only do a layout if changes have occurred that make it necessary.
RenderView* renderView = this->renderView();
if (renderView && renderView->needsLayout())
layout();
else
scrollToAnchor();
}
void FrameView::scrollElementToRect(Element* element, const IntRect& rect)
{
// FIXME(http://crbug.com/371896) - This method shouldn't be manually doing
// coordinate transformations to the PinchViewport.
IntRect targetRect(rect);
m_frame->document()->updateLayoutIgnorePendingStylesheets();
bool pinchVirtualViewportEnabled = m_frame->settings()->pinchVirtualViewportEnabled();
if (pinchVirtualViewportEnabled) {
PinchViewport& pinchViewport = m_frame->page()->frameHost().pinchViewport();
IntSize pinchViewportSize = expandedIntSize(pinchViewport.visibleRect().size());
targetRect.moveBy(ceiledIntPoint(pinchViewport.visibleRect().location()));
targetRect.setSize(pinchViewportSize.shrunkTo(targetRect.size()));
}
LayoutRect bounds = element->boundingBox();
int centeringOffsetX = (targetRect.width() - bounds.width()) / 2;
int centeringOffsetY = (targetRect.height() - bounds.height()) / 2;
IntPoint targetOffset(
bounds.x() - centeringOffsetX - targetRect.x(),
bounds.y() - centeringOffsetY - targetRect.y());
setScrollPosition(targetOffset);
if (pinchVirtualViewportEnabled) {
IntPoint remainder = IntPoint(targetOffset - scrollPosition());
m_frame->page()->frameHost().pinchViewport().move(remainder);
}
}
void FrameView::setScrollPosition(const IntPoint& scrollPoint, ScrollBehavior scrollBehavior)
{
cancelProgrammaticScrollAnimation();
TemporaryChange<bool> changeInProgrammaticScroll(m_inProgrammaticScroll, true);
m_maintainScrollPositionAnchor = nullptr;
IntPoint newScrollPosition = adjustScrollPositionWithinRange(scrollPoint);
if (newScrollPosition == scrollPosition())
return;
if (scrollBehavior == ScrollBehaviorAuto) {
RenderObject* renderer = m_frame->document()->documentElement() ? m_frame->document()->documentElement()->renderer() : 0;
if (renderer)
scrollBehavior = renderer->style()->scrollBehavior();
else
scrollBehavior = ScrollBehaviorInstant;
}
ScrollView::setScrollPosition(newScrollPosition, scrollBehavior);
}
void FrameView::setScrollPositionNonProgrammatically(const IntPoint& scrollPoint)
{
IntPoint newScrollPosition = adjustScrollPositionWithinRange(scrollPoint);
if (newScrollPosition == scrollPosition())
return;
TemporaryChange<bool> changeInProgrammaticScroll(m_inProgrammaticScroll, false);
notifyScrollPositionChanged(newScrollPosition);
}
IntSize FrameView::layoutSize(IncludeScrollbarsInRect scrollbarInclusion) const
{
return scrollbarInclusion == ExcludeScrollbars ? excludeScrollbars(m_layoutSize) : m_layoutSize;
}
void FrameView::setLayoutSize(const IntSize& size)
{
ASSERT(!layoutSizeFixedToFrameSize());
setLayoutSizeInternal(size);
}
void FrameView::scrollPositionChanged()
{
setWasScrolledByUser(true);
Document* document = m_frame->document();
document->enqueueScrollEventForNode(document);
m_frame->eventHandler().dispatchFakeMouseMoveEventSoon();
if (RenderView* renderView = document->renderView()) {
if (renderView->usesCompositing())
renderView->compositor()->frameViewDidScroll();
}
if (m_didScrollTimer.isActive())
m_didScrollTimer.stop();
m_didScrollTimer.startOneShot(resourcePriorityUpdateDelayAfterScroll, FROM_HERE);
if (AXObjectCache* cache = m_frame->document()->existingAXObjectCache())
cache->handleScrollPositionChanged(this);
frame().loader().saveScrollState();
}
void FrameView::didScrollTimerFired(Timer<FrameView>*)
{
if (m_frame->document() && m_frame->document()->renderView()) {
ResourceLoadPriorityOptimizer::resourceLoadPriorityOptimizer()->updateAllImageResourcePriorities();
}
}
void FrameView::updateLayersAndCompositingAfterScrollIfNeeded()
{
// Nothing to do after scrolling if there are no fixed position elements.
if (!hasViewportConstrainedObjects())
return;
RefPtr<FrameView> protect(this);
// If there fixed position elements, scrolling may cause compositing layers to change.
// Update widget and layer positions after scrolling, but only if we're not inside of
// layout.
if (!m_nestedLayoutCount) {
updateWidgetPositions();
if (RenderView* renderView = this->renderView())
renderView->layer()->setNeedsCompositingInputsUpdate();
}
}
void FrameView::updateFixedElementPaintInvalidationRectsAfterScroll()
{
if (!hasViewportConstrainedObjects())
return;
// Update the paint invalidation rects for fixed elements after scrolling and invalidation to reflect
// the new scroll position.
ViewportConstrainedObjectSet::const_iterator end = m_viewportConstrainedObjects->end();
for (ViewportConstrainedObjectSet::const_iterator it = m_viewportConstrainedObjects->begin(); it != end; ++it) {
RenderObject* renderer = *it;
// m_viewportConstrainedObjects should not contain non-viewport constrained objects.
ASSERT(renderer->style()->hasViewportConstrainedPosition());
// Fixed items should always have layers.
ASSERT(renderer->hasLayer());
RenderLayer* layer = toRenderBoxModelObject(renderer)->layer();
// Don't need to do this for composited fixed items.
if (layer->compositingState() == PaintsIntoOwnBacking)
continue;
layer->paintInvalidator().computePaintInvalidationRectsIncludingNonCompositingDescendants();
}
}
void FrameView::updateCompositedSelectionBoundsIfNeeded()
{
if (!RuntimeEnabledFeatures::compositedSelectionUpdatesEnabled())
return;
Page* page = frame().page();
ASSERT(page);
LocalFrame* frame = toLocalFrame(page->focusController().focusedOrMainFrame());
if (!frame || !frame->selection().isCaretOrRange()) {
page->chrome().client().clearCompositedSelectionBounds();
return;
}
// TODO(jdduke): Compute and route selection bounds through ChromeClient.
}
bool FrameView::isRubberBandInProgress() const
{
if (scrollbarsSuppressed())
return false;
// If the main thread updates the scroll position for this FrameView, we should return
// ScrollAnimator::isRubberBandInProgress().
if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
return scrollAnimator->isRubberBandInProgress();
return false;
}
HostWindow* FrameView::hostWindow() const
{
Page* page = frame().page();
if (!page)
return 0;
return &page->chrome();
}
void FrameView::contentRectangleForPaintInvalidation(const IntRect& r)
{
ASSERT(paintInvalidationIsAllowed());
ASSERT(!m_frame->owner());
if (m_isTrackingPaintInvalidations) {
IntRect paintInvalidationRect = r;
paintInvalidationRect.move(-scrollOffset());
m_trackedPaintInvalidationRects.append(paintInvalidationRect);
// FIXME: http://crbug.com/368518. Eventually, invalidateContentRectangleForPaint
// is going away entirely once all layout tests are FCM. In the short
// term, no code should be tracking non-composited FrameView paint invalidations.
RELEASE_ASSERT_NOT_REACHED();
}
ScrollView::contentRectangleForPaintInvalidation(r);
}
void FrameView::contentsResized()
{
if (m_frame->isMainFrame() && m_frame->document()) {
if (TextAutosizer* textAutosizer = m_frame->document()->textAutosizer())
textAutosizer->updatePageInfoInAllFrames();
}
ScrollView::contentsResized();
setNeedsLayout();
}
void FrameView::scrollbarExistenceDidChange()
{
// We check to make sure the view is attached to a frame() as this method can
// be triggered before the view is attached by LocalFrame::createView(...) setting
// various values such as setScrollBarModes(...) for example. An ASSERT is
// triggered when a view is layout before being attached to a frame().
if (!frame().view())
return;
// Note that simply having overlay scrollbars is not sufficient to be
// certain that scrollbars' presence does not impact layout. This should
// also check if custom scrollbars (as reported by shouldUseCustomScrollbars)
// are in use as well.
// http://crbug.com/269692
bool useOverlayScrollbars = ScrollbarTheme::theme()->usesOverlayScrollbars();
if (!useOverlayScrollbars && needsLayout())
layout();
if (renderView() && renderView()->usesCompositing()) {
renderView()->compositor()->frameViewScrollbarsExistenceDidChange();
if (!useOverlayScrollbars)
renderView()->compositor()->frameViewDidChangeSize();
}
}
void FrameView::handleLoadCompleted()
{
// Once loading has completed, allow autoSize one last opportunity to
// reduce the size of the frame.
autoSizeIfEnabled();
}
void FrameView::scheduleRelayout()
{
ASSERT(m_frame->view() == this);
if (isSubtreeLayout()) {
m_layoutSubtreeRoot->markContainingBlocksForLayout(false);
m_layoutSubtreeRoot = 0;
}
if (!m_layoutSchedulingEnabled)
return;
if (!needsLayout())
return;
if (!m_frame->document()->shouldScheduleLayout())
return;
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "InvalidateLayout", "frame", m_frame.get());
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
// FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
InspectorInstrumentation::didInvalidateLayout(m_frame.get());
if (m_hasPendingLayout)
return;
m_hasPendingLayout = true;
page()->animator().scheduleVisualUpdate();
lifecycle().ensureStateAtMost(DocumentLifecycle::StyleClean);
}
static bool isObjectAncestorContainerOf(RenderObject* ancestor, RenderObject* descendant)
{
for (RenderObject* r = descendant; r; r = r->container()) {
if (r == ancestor)
return true;
}
return false;
}
void FrameView::scheduleRelayoutOfSubtree(RenderObject* relayoutRoot)
{
ASSERT(m_frame->view() == this);
// FIXME: Should this call shouldScheduleLayout instead?
if (!m_frame->document()->isActive())
return;
RenderView* renderView = this->renderView();
if (renderView && renderView->needsLayout()) {
if (relayoutRoot)
relayoutRoot->markContainingBlocksForLayout(false);
return;
}
if (layoutPending() || !m_layoutSchedulingEnabled) {
if (m_layoutSubtreeRoot != relayoutRoot) {
if (isObjectAncestorContainerOf(m_layoutSubtreeRoot, relayoutRoot)) {
// Keep the current root
relayoutRoot->markContainingBlocksForLayout(false, m_layoutSubtreeRoot);
ASSERT(!m_layoutSubtreeRoot->container() || !m_layoutSubtreeRoot->container()->needsLayout());
} else if (isSubtreeLayout() && isObjectAncestorContainerOf(relayoutRoot, m_layoutSubtreeRoot)) {
// Re-root at relayoutRoot
m_layoutSubtreeRoot->markContainingBlocksForLayout(false, relayoutRoot);
m_layoutSubtreeRoot = relayoutRoot;
ASSERT(!m_layoutSubtreeRoot->container() || !m_layoutSubtreeRoot->container()->needsLayout());
} else {
// Just do a full relayout
if (isSubtreeLayout())
m_layoutSubtreeRoot->markContainingBlocksForLayout(false);
m_layoutSubtreeRoot = 0;
relayoutRoot->markContainingBlocksForLayout(false);
}
}
} else if (m_layoutSchedulingEnabled) {
m_layoutSubtreeRoot = relayoutRoot;
ASSERT(!m_layoutSubtreeRoot->container() || !m_layoutSubtreeRoot->container()->needsLayout());
m_hasPendingLayout = true;
page()->animator().scheduleVisualUpdate();
lifecycle().ensureStateAtMost(DocumentLifecycle::StyleClean);
}
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "InvalidateLayout", "frame", m_frame.get());
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
// FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
InspectorInstrumentation::didInvalidateLayout(m_frame.get());
}
bool FrameView::layoutPending() const
{
// FIXME: This should check Document::lifecycle instead.
return m_hasPendingLayout;
}
bool FrameView::isInPerformLayout() const
{
ASSERT(m_inPerformLayout == (lifecycle().state() == DocumentLifecycle::InPerformLayout));
return m_inPerformLayout;
}
bool FrameView::needsLayout() const
{
// This can return true in cases where the document does not have a body yet.
// Document::shouldScheduleLayout takes care of preventing us from scheduling
// layout in that case.
RenderView* renderView = this->renderView();
return layoutPending()
|| (renderView && renderView->needsLayout())
|| isSubtreeLayout();
}
void FrameView::setNeedsLayout()
{
if (RenderView* renderView = this->renderView())
renderView->setNeedsLayout();
}
bool FrameView::isTransparent() const
{
return m_isTransparent;
}
void FrameView::setTransparent(bool isTransparent)
{
m_isTransparent = isTransparent;
DisableCompositingQueryAsserts disabler;
if (renderView() && renderView()->layer()->hasCompositedLayerMapping())
renderView()->layer()->compositedLayerMapping()->updateContentsOpaque();
}
bool FrameView::hasOpaqueBackground() const
{
return !m_isTransparent && !m_baseBackgroundColor.hasAlpha();
}
Color FrameView::baseBackgroundColor() const
{
return m_baseBackgroundColor;
}
void FrameView::setBaseBackgroundColor(const Color& backgroundColor)
{
m_baseBackgroundColor = backgroundColor;
if (renderView() && renderView()->layer()->hasCompositedLayerMapping()) {
CompositedLayerMapping* compositedLayerMapping = renderView()->layer()->compositedLayerMapping();
compositedLayerMapping->updateContentsOpaque();
if (compositedLayerMapping->mainGraphicsLayer())
compositedLayerMapping->mainGraphicsLayer()->setNeedsDisplay();
}
recalculateScrollbarOverlayStyle();
}
void FrameView::updateBackgroundRecursively(const Color& backgroundColor, bool transparent)
{
for (Frame* frame = m_frame.get(); frame; frame = frame->tree().traverseNext(m_frame.get())) {
if (!frame->isLocalFrame())
continue;
if (FrameView* view = toLocalFrame(frame)->view()) {
view->setTransparent(transparent);
view->setBaseBackgroundColor(backgroundColor);
}
}
}
void FrameView::scrollToAnchor()
{
RefPtrWillBeRawPtr<Node> anchorNode = m_maintainScrollPositionAnchor;
if (!anchorNode)
return;
if (!anchorNode->renderer())
return;
LayoutRect rect;
if (anchorNode != m_frame->document())
rect = anchorNode->boundingBox();
// Scroll nested layers and frames to reveal the anchor.
// Align to the top and to the closest side (this matches other browsers).
anchorNode->renderer()->scrollRectToVisible(rect, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignTopAlways);
if (AXObjectCache* cache = m_frame->document()->existingAXObjectCache())
cache->handleScrolledToAnchor(anchorNode.get());
// scrollRectToVisible can call into setScrollPosition(), which resets m_maintainScrollPositionAnchor.
m_maintainScrollPositionAnchor = anchorNode;
}
bool FrameView::updateWidgets()
{
// This is always called from updateWidgetsTimerFired.
// m_updateWidgetsTimer should only be scheduled if we have widgets to update.
// Thus I believe we can stop checking isEmpty here, and just ASSERT isEmpty:
ASSERT(!m_widgetUpdateSet.isEmpty());
if (m_nestedLayoutCount > 1 || m_widgetUpdateSet.isEmpty())
return true;
// Need to swap because script will run inside the below loop and invalidate the iterator.
EmbeddedObjectSet objects;
objects.swap(m_widgetUpdateSet);
for (EmbeddedObjectSet::iterator it = objects.begin(); it != objects.end(); ++it) {
RenderEmbeddedObject& object = **it;
HTMLPlugInElement* element = toHTMLPlugInElement(object.node());
// The object may have already been destroyed (thus node cleared),
// but FrameView holds a manual ref, so it won't have been deleted.
if (!element)
continue;
// No need to update if it's already crashed or known to be missing.
if (object.showsUnavailablePluginIndicator())
continue;
if (element->needsWidgetUpdate())
element->updateWidget();
object.updateWidgetPosition();
// Prevent plugins from causing infinite updates of themselves.
// FIXME: Do we really need to prevent this?
m_widgetUpdateSet.remove(&object);
}
return m_widgetUpdateSet.isEmpty();
}
void FrameView::updateWidgetsTimerFired(Timer<FrameView>*)
{
ASSERT(!isInPerformLayout());
RefPtr<FrameView> protect(this);
m_updateWidgetsTimer.stop();
for (unsigned i = 0; i < maxUpdateWidgetsIterations; ++i) {
if (updateWidgets())
return;
}
}
void FrameView::flushAnyPendingPostLayoutTasks()
{
ASSERT(!isInPerformLayout());
if (m_postLayoutTasksTimer.isActive())
performPostLayoutTasks();
if (m_updateWidgetsTimer.isActive())
updateWidgetsTimerFired(0);
}
void FrameView::scheduleUpdateWidgetsIfNecessary()
{
ASSERT(!isInPerformLayout());
if (m_updateWidgetsTimer.isActive() || m_widgetUpdateSet.isEmpty())
return;
m_updateWidgetsTimer.startOneShot(0, FROM_HERE);
}
void FrameView::performPostLayoutTasks()
{
// FIXME: We can reach here, even when the page is not active!
// http/tests/inspector/elements/html-link-import.html and many other
// tests hit that case.
// We should ASSERT(isActive()); or at least return early if we can!
ASSERT(!isInPerformLayout()); // Always before or after performLayout(), part of the highest-level layout() call.
TRACE_EVENT0("blink", "FrameView::performPostLayoutTasks");
RefPtr<FrameView> protect(this);
m_postLayoutTasksTimer.stop();
m_frame->selection().setCaretRectNeedsUpdate();
{
// Hits in compositing/overflow/do-not-repaint-if-scrolling-composited-layers.html
DisableCompositingQueryAsserts disabler;
m_frame->selection().updateAppearance();
}
ASSERT(m_frame->document());
if (m_nestedLayoutCount <= 1) {
if (m_firstLayoutCallbackPending)
m_firstLayoutCallbackPending = false;
// Ensure that we always send this eventually.
if (!m_frame->document()->parsing() && m_frame->loader().stateMachine()->committedFirstRealDocumentLoad())
m_isVisuallyNonEmpty = true;
// If the layout was done with pending sheets, we are not in fact visually non-empty yet.
if (m_isVisuallyNonEmpty && !m_frame->document()->didLayoutWithPendingStylesheets() && m_firstVisuallyNonEmptyLayoutCallbackPending) {
m_firstVisuallyNonEmptyLayoutCallbackPending = false;
// FIXME: This callback is probably not needed, but is currently used
// by android for setting the background color.
m_frame->loader().client()->dispatchDidFirstVisuallyNonEmptyLayout();
}
}
FontFaceSet::didLayout(*m_frame->document());
updateWidgetPositions();
// Plugins could have torn down the page inside updateWidgetPositions().
if (!renderView())
return;
scheduleUpdateWidgetsIfNecessary();
if (Page* page = m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
scrollingCoordinator->notifyLayoutUpdated();
}
scrollToAnchor();
sendResizeEventIfNeeded();
}
void FrameView::sendResizeEventIfNeeded()
{
ASSERT(m_frame);
RenderView* renderView = this->renderView();
if (!renderView || renderView->document().printing())
return;
IntSize currentSize = layoutSize(IncludeScrollbars);
float currentZoomFactor = renderView->style()->zoom();
bool shouldSendResizeEvent = currentSize != m_lastViewportSize || currentZoomFactor != m_lastZoomFactor;
m_lastViewportSize = currentSize;
m_lastZoomFactor = currentZoomFactor;
if (!shouldSendResizeEvent)
return;
m_frame->document()->enqueueResizeEvent();
if (m_frame->isMainFrame())
InspectorInstrumentation::didResizeMainFrame(m_frame->page());
}
void FrameView::postLayoutTimerFired(Timer<FrameView>*)
{
performPostLayoutTasks();
}
void FrameView::updateCounters()
{
RenderView* view = renderView();
if (!view->hasRenderCounters())
return;
for (RenderObject* renderer = view; renderer; renderer = renderer->nextInPreOrder()) {
if (!renderer->isCounter())
continue;
toRenderCounter(renderer)->updateCounter();
}
}
void FrameView::autoSizeIfEnabled()
{
if (!m_shouldAutoSize)
return;
if (m_inAutoSize)
return;
TemporaryChange<bool> changeInAutoSize(m_inAutoSize, true);
Document* document = frame().document();
if (!document || !document->isActive())
return;
Element* documentElement = document->documentElement();
if (!documentElement)
return;
// If this is the first time we run autosize, start from small height and
// allow it to grow.
if (!m_didRunAutosize)
resize(frameRect().width(), m_minAutoSize.height());
IntSize size = frameRect().size();
// Do the resizing twice. The first time is basically a rough calculation using the preferred width
// which may result in a height change during the second iteration.
for (int i = 0; i < 2; i++) {
// Update various sizes including contentsSize, scrollHeight, etc.
document->updateLayoutIgnorePendingStylesheets();
RenderView* renderView = document->renderView();
if (!renderView)
return;
int width = renderView->minPreferredLogicalWidth();
RenderBox* documentRenderBox = documentElement->renderBox();
if (!documentRenderBox)
return;
int height = documentRenderBox->scrollHeight();
IntSize newSize(width, height);
// Check to see if a scrollbar is needed for a given dimension and
// if so, increase the other dimension to account for the scrollbar.
// Since the dimensions are only for the view rectangle, once a
// dimension exceeds the maximum, there is no need to increase it further.
if (newSize.width() > m_maxAutoSize.width()) {
RefPtr<Scrollbar> localHorizontalScrollbar = horizontalScrollbar();
if (!localHorizontalScrollbar)
localHorizontalScrollbar = createScrollbar(HorizontalScrollbar);
if (!localHorizontalScrollbar->isOverlayScrollbar())
newSize.setHeight(newSize.height() + localHorizontalScrollbar->height());
// Don't bother checking for a vertical scrollbar because the width is at
// already greater the maximum.
} else if (newSize.height() > m_maxAutoSize.height()) {
RefPtr<Scrollbar> localVerticalScrollbar = verticalScrollbar();
if (!localVerticalScrollbar)
localVerticalScrollbar = createScrollbar(VerticalScrollbar);
if (!localVerticalScrollbar->isOverlayScrollbar())
newSize.setWidth(newSize.width() + localVerticalScrollbar->width());
// Don't bother checking for a horizontal scrollbar because the height is
// already greater the maximum.
}
// Ensure the size is at least the min bounds.
newSize = newSize.expandedTo(m_minAutoSize);
// Bound the dimensions by the max bounds and determine what scrollbars to show.
ScrollbarMode horizonalScrollbarMode = ScrollbarAlwaysOff;
if (newSize.width() > m_maxAutoSize.width()) {
newSize.setWidth(m_maxAutoSize.width());
horizonalScrollbarMode = ScrollbarAlwaysOn;
}
ScrollbarMode verticalScrollbarMode = ScrollbarAlwaysOff;
if (newSize.height() > m_maxAutoSize.height()) {
newSize.setHeight(m_maxAutoSize.height());
verticalScrollbarMode = ScrollbarAlwaysOn;
}
if (newSize == size)
continue;
// While loading only allow the size to increase (to avoid twitching during intermediate smaller states)
// unless autoresize has just been turned on or the maximum size is smaller than the current size.
if (m_didRunAutosize && size.height() <= m_maxAutoSize.height() && size.width() <= m_maxAutoSize.width()
&& !m_frame->document()->loadEventFinished() && (newSize.height() < size.height() || newSize.width() < size.width()))
break;
resize(newSize.width(), newSize.height());
// Force the scrollbar state to avoid the scrollbar code adding them and causing them to be needed. For example,
// a vertical scrollbar may cause text to wrap and thus increase the height (which is the only reason the scollbar is needed).
setVerticalScrollbarLock(false);
setHorizontalScrollbarLock(false);
setScrollbarModes(horizonalScrollbarMode, verticalScrollbarMode, true, true);
}
m_didRunAutosize = true;
}
void FrameView::updateOverflowStatus(bool horizontalOverflow, bool verticalOverflow)
{
if (!m_viewportRenderer)
return;
if (m_overflowStatusDirty) {
m_horizontalOverflow = horizontalOverflow;
m_verticalOverflow = verticalOverflow;
m_overflowStatusDirty = false;
return;
}
bool horizontalOverflowChanged = (m_horizontalOverflow != horizontalOverflow);
bool verticalOverflowChanged = (m_verticalOverflow != verticalOverflow);
if (horizontalOverflowChanged || verticalOverflowChanged) {
m_horizontalOverflow = horizontalOverflow;
m_verticalOverflow = verticalOverflow;
RefPtrWillBeRawPtr<OverflowEvent> event = OverflowEvent::create(horizontalOverflowChanged, horizontalOverflow, verticalOverflowChanged, verticalOverflow);
event->setTarget(m_viewportRenderer->node());
m_frame->document()->enqueueAnimationFrameEvent(event.release());
}
}
IntRect FrameView::windowClipRect(IncludeScrollbarsInRect scrollbarInclusion) const
{
ASSERT(m_frame->view() == this);
if (paintsEntireContents())
return IntRect(IntPoint(), contentsSize());
// Set our clip rect to be our contents.
IntRect clipRect = contentsToWindow(visibleContentRect(scrollbarInclusion));
if (!m_frame->deprecatedLocalOwner())
return clipRect;
// Take our owner element and get its clip rect.
// FIXME: Do we need to do this for remote frames?
HTMLFrameOwnerElement* ownerElement = m_frame->deprecatedLocalOwner();
FrameView* parentView = ownerElement->document().view();
if (parentView)
clipRect.intersect(parentView->windowClipRectForFrameOwner(ownerElement));
return clipRect;
}
IntRect FrameView::windowClipRectForFrameOwner(const HTMLFrameOwnerElement* ownerElement) const
{
// The renderer can sometimes be null when style="display:none" interacts
// with external content and plugins.
if (!ownerElement->renderer())
return windowClipRect();
// If we have no layer, just return our window clip rect.
const RenderLayer* enclosingLayer = ownerElement->renderer()->enclosingLayer();
if (!enclosingLayer)
return windowClipRect();
// FIXME: childrenClipRect relies on compositingState, which is not necessarily up to date.
// https://code.google.com/p/chromium/issues/detail?id=343769
DisableCompositingQueryAsserts disabler;
// Apply the clip from the layer.
IntRect clipRect = contentsToWindow(pixelSnappedIntRect(enclosingLayer->clipper().childrenClipRect()));
return intersection(clipRect, windowClipRect());
}
bool FrameView::isActive() const
{
Page* page = frame().page();
return page && page->focusController().isActive();
}
void FrameView::scrollTo(const IntSize& newOffset)
{
LayoutSize offset = scrollOffset();
ScrollView::scrollTo(newOffset);
if (offset != scrollOffset()) {
updateLayersAndCompositingAfterScrollIfNeeded();
scrollPositionChanged();
}
frame().loader().client()->didChangeScrollOffset();
}
void FrameView::invalidateScrollbarRect(Scrollbar* scrollbar, const IntRect& rect)
{
// Add in our offset within the FrameView.
IntRect dirtyRect = rect;
dirtyRect.moveBy(scrollbar->location());
if (isInPerformLayout())
addScrollbarDamage(scrollbar, rect);
else
invalidateRect(dirtyRect);
}
void FrameView::getTickmarks(Vector<IntRect>& tickmarks) const
{
if (!m_tickmarks.isEmpty())
tickmarks = m_tickmarks;
else
tickmarks = frame().document()->markers().renderedRectsForMarkers(DocumentMarker::TextMatch);
}
IntRect FrameView::windowResizerRect() const
{
Page* page = frame().page();
if (!page)
return IntRect();
return page->chrome().windowResizerRect();
}
void FrameView::setVisibleContentScaleFactor(float visibleContentScaleFactor)
{
if (m_visibleContentScaleFactor == visibleContentScaleFactor)
return;
m_visibleContentScaleFactor = visibleContentScaleFactor;
updateScrollbars(scrollOffset());
}
void FrameView::setInputEventsTransformForEmulation(const IntSize& offset, float contentScaleFactor)
{
m_inputEventsOffsetForEmulation = offset;
m_inputEventsScaleFactorForEmulation = contentScaleFactor;
}
IntSize FrameView::inputEventsOffsetForEmulation() const
{
return m_inputEventsOffsetForEmulation;
}
float FrameView::inputEventsScaleFactor() const
{
float pageScale = m_frame->settings()->pinchVirtualViewportEnabled()
? m_frame->page()->frameHost().pinchViewport().scale()
: visibleContentScaleFactor();
return pageScale * m_inputEventsScaleFactorForEmulation;
}
bool FrameView::scrollbarsCanBeActive() const
{
if (m_frame->view() != this)
return false;
return !!m_frame->document();
}
IntRect FrameView::scrollableAreaBoundingBox() const
{
RenderPart* ownerRenderer = frame().ownerRenderer();
if (!ownerRenderer)
return frameRect();
return ownerRenderer->absoluteContentQuad().enclosingBoundingBox();
}
bool FrameView::isScrollable()
{
// Check for:
// 1) If there an actual overflow.
// 2) display:none or visibility:hidden set to self or inherited.
// 3) overflow{-x,-y}: hidden;
// 4) scrolling: no;
// Covers #1
IntSize contentsSize = this->contentsSize();
IntSize visibleContentSize = visibleContentRect().size();
if ((contentsSize.height() <= visibleContentSize.height() && contentsSize.width() <= visibleContentSize.width()))
return false;
// Covers #2.
// FIXME: Do we need to fix this for OOPI?
HTMLFrameOwnerElement* owner = m_frame->deprecatedLocalOwner();
if (owner && (!owner->renderer() || !owner->renderer()->visibleToHitTesting()))
return false;
// Cover #3 and #4.
ScrollbarMode horizontalMode;
ScrollbarMode verticalMode;
calculateScrollbarModesForLayoutAndSetViewportRenderer(horizontalMode, verticalMode, RulesFromWebContentOnly);
if (horizontalMode == ScrollbarAlwaysOff && verticalMode == ScrollbarAlwaysOff)
return false;
return true;
}
void FrameView::updateScrollableAreaSet()
{
// That ensures that only inner frames are cached.
FrameView* parentFrameView = this->parentFrameView();
if (!parentFrameView)
return;
if (!isScrollable()) {
parentFrameView->removeScrollableArea(this);
return;
}
parentFrameView->addScrollableArea(this);
}
bool FrameView::shouldSuspendScrollAnimations() const
{
return m_frame->loader().state() != FrameStateComplete;
}
void FrameView::scrollbarStyleChanged()
{
// FIXME: Why does this only apply to the main frame?
if (!m_frame->isMainFrame())
return;
ScrollView::scrollbarStyleChanged();
}
void FrameView::notifyPageThatContentAreaWillPaint() const
{
Page* page = m_frame->page();
if (!page)
return;
contentAreaWillPaint();
if (!m_scrollableAreas)
return;
for (HashSet<ScrollableArea*>::const_iterator it = m_scrollableAreas->begin(), end = m_scrollableAreas->end(); it != end; ++it) {
ScrollableArea* scrollableArea = *it;
if (!scrollableArea->scrollbarsCanBeActive())
continue;
scrollableArea->contentAreaWillPaint();
}
}
bool FrameView::scrollAnimatorEnabled() const
{
return m_frame->settings() && m_frame->settings()->scrollAnimatorEnabled();
}
void FrameView::updateAnnotatedRegions()
{
Document* document = m_frame->document();
if (!document->hasAnnotatedRegions())
return;
Vector<AnnotatedRegionValue> newRegions;
document->renderBox()->collectAnnotatedRegions(newRegions);
if (newRegions == document->annotatedRegions())
return;
document->setAnnotatedRegions(newRegions);
if (Page* page = m_frame->page())
page->chrome().client().annotatedRegionsChanged();
}
void FrameView::updateScrollCorner()
{
RefPtr<RenderStyle> cornerStyle;
IntRect cornerRect = scrollCornerRect();
Document* doc = m_frame->document();
if (doc && !cornerRect.isEmpty()) {
// Try the <body> element first as a scroll corner source.
if (Element* body = doc->body()) {
if (RenderObject* renderer = body->renderer())
cornerStyle = renderer->getUncachedPseudoStyle(PseudoStyleRequest(SCROLLBAR_CORNER), renderer->style());
}
if (!cornerStyle) {
// If the <body> didn't have a custom style, then the root element might.
if (Element* docElement = doc->documentElement()) {
if (RenderObject* renderer = docElement->renderer())
cornerStyle = renderer->getUncachedPseudoStyle(PseudoStyleRequest(SCROLLBAR_CORNER), renderer->style());
}
}
if (!cornerStyle) {
// If we have an owning ipage/LocalFrame element, then it can set the custom scrollbar also.
if (RenderPart* renderer = m_frame->ownerRenderer())
cornerStyle = renderer->getUncachedPseudoStyle(PseudoStyleRequest(SCROLLBAR_CORNER), renderer->style());
}
}
if (cornerStyle) {
if (!m_scrollCorner)
m_scrollCorner = RenderScrollbarPart::createAnonymous(doc);
m_scrollCorner->setStyle(cornerStyle.release());
invalidateScrollCorner(cornerRect);
} else if (m_scrollCorner) {
m_scrollCorner->destroy();
m_scrollCorner = nullptr;
}
ScrollView::updateScrollCorner();
}
void FrameView::paintScrollCorner(GraphicsContext* context, const IntRect& cornerRect)
{
if (m_scrollCorner) {
bool needsBackgorund = m_frame->isMainFrame();
if (needsBackgorund)
context->fillRect(cornerRect, baseBackgroundColor());
m_scrollCorner->paintIntoRect(context, cornerRect.location(), cornerRect);
return;
}
ScrollView::paintScrollCorner(context, cornerRect);
}
void FrameView::paintScrollbar(GraphicsContext* context, Scrollbar* bar, const IntRect& rect)
{
bool needsBackgorund = bar->isCustomScrollbar() && m_frame->isMainFrame();
if (needsBackgorund) {
IntRect toFill = bar->frameRect();
toFill.intersect(rect);
context->fillRect(toFill, baseBackgroundColor());
}
ScrollView::paintScrollbar(context, bar, rect);
}
Color FrameView::documentBackgroundColor() const
{
// <https://bugs.webkit.org/show_bug.cgi?id=59540> We blend the background color of
// the document and the body against the base background color of the frame view.
// Background images are unfortunately impractical to include.
Color result = baseBackgroundColor();
if (!frame().document())
return result;
Element* htmlElement = frame().document()->documentElement();
Element* bodyElement = frame().document()->body();
// We take the aggregate of the base background color
// the <html> background color, and the <body>
// background color to find the document color. The
// addition of the base background color is not
// technically part of the document background, but it
// otherwise poses problems when the aggregate is not
// fully opaque.
if (htmlElement && htmlElement->renderer())
result = result.blend(htmlElement->renderer()->style()->visitedDependentColor(CSSPropertyBackgroundColor));
if (bodyElement && bodyElement->renderer())
result = result.blend(bodyElement->renderer()->style()->visitedDependentColor(CSSPropertyBackgroundColor));
return result;
}
bool FrameView::hasCustomScrollbars() const
{
const HashSet<RefPtr<Widget> >* viewChildren = children();
HashSet<RefPtr<Widget> >::const_iterator end = viewChildren->end();
for (HashSet<RefPtr<Widget> >::const_iterator current = viewChildren->begin(); current != end; ++current) {
Widget* widget = current->get();
if (widget->isFrameView()) {
if (toFrameView(widget)->hasCustomScrollbars())
return true;
} else if (widget->isScrollbar()) {
Scrollbar* scrollbar = static_cast<Scrollbar*>(widget);
if (scrollbar->isCustomScrollbar())
return true;
}
}
return false;
}
FrameView* FrameView::parentFrameView() const
{
if (!parent())
return 0;
Frame* parentFrame = m_frame->tree().parent();
if (parentFrame && parentFrame->isLocalFrame())
return toLocalFrame(parentFrame)->view();
return 0;
}
bool FrameView::wasScrolledByUser() const
{
return m_wasScrolledByUser;
}
void FrameView::setWasScrolledByUser(bool wasScrolledByUser)
{
if (m_inProgrammaticScroll)
return;
m_maintainScrollPositionAnchor = nullptr;
m_wasScrolledByUser = wasScrolledByUser;
}
void FrameView::paintContents(GraphicsContext* p, const IntRect& rect)
{
Document* document = m_frame->document();
#ifndef NDEBUG
bool fillWithRed;
if (document->printing())
fillWithRed = false; // Printing, don't fill with red (can't remember why).
else if (m_frame->owner())
fillWithRed = false; // Subframe, don't fill with red.
else if (isTransparent())
fillWithRed = false; // Transparent, don't fill with red.
else if (m_paintBehavior & PaintBehaviorSelectionOnly)
fillWithRed = false; // Selections are transparent, don't fill with red.
else if (m_nodeToDraw)
fillWithRed = false; // Element images are transparent, don't fill with red.
else
fillWithRed = true;
if (fillWithRed)
p->fillRect(rect, Color(0xFF, 0, 0));
#endif
RenderView* renderView = this->renderView();
if (!renderView) {
WTF_LOG_ERROR("called FrameView::paint with nil renderer");
return;
}
RELEASE_ASSERT(!needsLayout());
ASSERT(document->lifecycle().state() >= DocumentLifecycle::CompositingClean);
TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "Paint", "data", InspectorPaintEvent::data(renderView, rect, 0));
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
// FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
InspectorInstrumentation::willPaint(renderView, 0);
bool isTopLevelPainter = !s_inPaintContents;
s_inPaintContents = true;
FontCachePurgePreventer fontCachePurgePreventer;
PaintBehavior oldPaintBehavior = m_paintBehavior;
if (FrameView* parentView = parentFrameView()) {
if (parentView->paintBehavior() & PaintBehaviorFlattenCompositingLayers)
m_paintBehavior |= PaintBehaviorFlattenCompositingLayers;
}
if (m_paintBehavior == PaintBehaviorNormal)
document->markers().invalidateRenderedRectsForMarkersInRect(rect);
if (document->printing())
m_paintBehavior |= PaintBehaviorFlattenCompositingLayers;
ASSERT(!m_isPainting);
m_isPainting = true;
// m_nodeToDraw is used to draw only one element (and its descendants)
RenderObject* renderer = m_nodeToDraw ? m_nodeToDraw->renderer() : 0;
RenderLayer* rootLayer = renderView->layer();
#if ENABLE(ASSERT)
renderView->assertSubtreeIsLaidOut();
RenderObject::SetLayoutNeededForbiddenScope forbidSetNeedsLayout(*rootLayer->renderer());
#endif
rootLayer->paint(p, rect, m_paintBehavior, renderer);
if (rootLayer->containsDirtyOverlayScrollbars())
rootLayer->paintOverlayScrollbars(p, rect, m_paintBehavior, renderer);
m_isPainting = false;
m_paintBehavior = oldPaintBehavior;
m_lastPaintTime = currentTime();
// Regions may have changed as a result of the visibility/z-index of element changing.
if (document->annotatedRegionsDirty())
updateAnnotatedRegions();
if (isTopLevelPainter) {
// Everythin that happens after paintContents completions is considered
// to be part of the next frame.
s_currentFrameTimeStamp = currentTime();
s_inPaintContents = false;
}
InspectorInstrumentation::didPaint(renderView, 0, p, rect);
}
void FrameView::setPaintBehavior(PaintBehavior behavior)
{
m_paintBehavior = behavior;
}
PaintBehavior FrameView::paintBehavior() const
{
return m_paintBehavior;
}
bool FrameView::isPainting() const
{
return m_isPainting;
}
void FrameView::setNodeToDraw(Node* node)
{
m_nodeToDraw = node;
}
void FrameView::paintOverhangAreas(GraphicsContext* context, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect)
{
if (m_frame->document()->printing())
return;
if (m_frame->isMainFrame()) {
if (m_frame->page()->chrome().client().paintCustomOverhangArea(context, horizontalOverhangArea, verticalOverhangArea, dirtyRect))
return;
}
ScrollView::paintOverhangAreas(context, horizontalOverhangArea, verticalOverhangArea, dirtyRect);
}
void FrameView::updateWidgetPositionsIfNeeded()
{
if (!m_needsUpdateWidgetPositions)
return;
m_needsUpdateWidgetPositions = false;
updateWidgetPositions();
}
void FrameView::updateLayoutAndStyleForPainting()
{
// Updating layout can run script, which can tear down the FrameView.
RefPtr<FrameView> protector(this);
updateLayoutAndStyleIfNeededRecursive();
updateWidgetPositionsIfNeeded();
if (RenderView* view = renderView()) {
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateLayerTree", "frame", m_frame.get());
// FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
InspectorInstrumentation::willUpdateLayerTree(m_frame.get());
view->compositor()->updateIfNeededRecursive();
if (view->compositor()->inCompositingMode() && m_frame->isLocalRoot())
m_frame->page()->scrollingCoordinator()->updateAfterCompositingChangeIfNeeded();
updateCompositedSelectionBoundsIfNeeded();
InspectorInstrumentation::didUpdateLayerTree(m_frame.get());
invalidateTreeIfNeededRecursive();
}
scrollContentsIfNeededRecursive();
ASSERT(lifecycle().state() == DocumentLifecycle::PaintInvalidationClean);
}
void FrameView::updateLayoutAndStyleIfNeededRecursive()
{
// We have to crawl our entire tree looking for any FrameViews that need
// layout and make sure they are up to date.
// Mac actually tests for intersection with the dirty region and tries not to
// update layout for frames that are outside the dirty region. Not only does this seem
// pointless (since those frames will have set a zero timer to layout anyway), but
// it is also incorrect, since if two frames overlap, the first could be excluded from the dirty
// region but then become included later by the second frame adding rects to the dirty region
// when it lays out.
m_frame->document()->updateRenderTreeIfNeeded();
if (needsLayout())
layout();
// FIXME: Calling layout() shouldn't trigger scripe execution or have any
// observable effects on the frame tree but we're not quite there yet.
Vector<RefPtr<FrameView> > frameViews;
for (Frame* child = m_frame->tree().firstChild(); child; child = child->tree().nextSibling()) {
if (!child->isLocalFrame())
continue;
if (FrameView* view = toLocalFrame(child)->view())
frameViews.append(view);
}
const Vector<RefPtr<FrameView> >::iterator end = frameViews.end();
for (Vector<RefPtr<FrameView> >::iterator it = frameViews.begin(); it != end; ++it)
(*it)->updateLayoutAndStyleIfNeededRecursive();
// When an <iframe> gets composited, it triggers an extra style recalc in its containing FrameView.
// To avoid pushing an invalid tree for display, we have to check for this case and do another
// style recalc. The extra style recalc needs to happen after our child <iframes> were updated.
// FIXME: We shouldn't be triggering an extra style recalc in the first place.
if (m_frame->document()->hasSVGFilterElementsRequiringLayerUpdate()) {
m_frame->document()->updateRenderTreeIfNeeded();
if (needsLayout())