blob: aa717443e142437a5e283d9707921593e74b0294 [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 "FrameView.h"
#include "AXObjectCache.h"
#include "AnimationController.h"
#include "BackForwardController.h"
#include "CachedImage.h"
#include "CachedResourceLoader.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "DOMWindow.h"
#include "DocumentMarkerController.h"
#include "EventHandler.h"
#include "FloatRect.h"
#include "FocusController.h"
#include "FontCache.h"
#include "FontLoader.h"
#include "Frame.h"
#include "FrameActionScheduler.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "FrameSelection.h"
#include "FrameTree.h"
#include "GraphicsContext.h"
#include "HTMLDocument.h"
#include "HTMLFrameElement.h"
#include "HTMLFrameSetElement.h"
#include "HTMLNames.h"
#include "HTMLPlugInImageElement.h"
#include "InspectorClient.h"
#include "InspectorController.h"
#include "InspectorInstrumentation.h"
#include "OverflowEvent.h"
#include "ProgressTracker.h"
#include "RenderArena.h"
#include "RenderEmbeddedObject.h"
#include "RenderFullScreen.h"
#include "RenderIFrame.h"
#include "RenderLayer.h"
#include "RenderLayerBacking.h"
#include "RenderPart.h"
#include "RenderScrollbar.h"
#include "RenderScrollbarPart.h"
#include "RenderStyle.h"
#include "RenderTheme.h"
#include "RenderView.h"
#include "ScrollAnimator.h"
#include "ScrollingCoordinator.h"
#include "Settings.h"
#include "StyleResolver.h"
#include "TextResourceDecoder.h"
#include "TextStream.h"
#include <wtf/CurrentTime.h>
#include <wtf/TemporaryChange.h>
#if USE(ACCELERATED_COMPOSITING)
#include "RenderLayerCompositor.h"
#include "TiledBacking.h"
#endif
#if ENABLE(SVG)
#include "RenderSVGRoot.h"
#include "SVGDocument.h"
#include "SVGSVGElement.h"
#endif
#if USE(TILED_BACKING_STORE)
#include "TiledBackingStore.h"
#endif
#if ENABLE(TEXT_AUTOSIZING)
#include "TextAutosizer.h"
#endif
namespace WebCore {
using namespace HTMLNames;
double FrameView::sCurrentPaintTimeStamp = 0.0;
// REPAINT_THROTTLING now chooses default values for throttling parameters.
// Should be removed when applications start using runtime configuration.
#if ENABLE(REPAINT_THROTTLING)
// Normal delay
double FrameView::s_normalDeferredRepaintDelay = 0.016;
// Negative value would mean that first few repaints happen without a delay
double FrameView::s_initialDeferredRepaintDelayDuringLoading = 0;
// The delay grows on each repaint to this maximum value
double FrameView::s_maxDeferredRepaintDelayDuringLoading = 2.5;
// On each repaint the delay increses by this amount
double FrameView::s_deferredRepaintDelayIncrementDuringLoading = 0.5;
#else
// FIXME: Repaint throttling could be good to have on all platform.
// The balance between CPU use and repaint frequency will need some tuning for desktop.
// More hooks may be needed to reset the delay on things like GIF and CSS animations.
double FrameView::s_normalDeferredRepaintDelay = 0;
double FrameView::s_initialDeferredRepaintDelayDuringLoading = 0;
double FrameView::s_maxDeferredRepaintDelayDuringLoading = 0;
double FrameView::s_deferredRepaintDelayIncrementDuringLoading = 0;
#endif
// The maximum number of updateWidgets iterations that should be done before returning.
static const unsigned maxUpdateWidgetsIterations = 2;
static RenderLayer::UpdateLayerPositionsFlags updateLayerPositionFlags(RenderLayer* layer, bool isRelayoutingSubtree, bool didFullRepaint)
{
RenderLayer::UpdateLayerPositionsFlags flags = RenderLayer::defaultFlags;
if (didFullRepaint) {
flags &= ~RenderLayer::CheckForRepaint;
flags |= RenderLayer::NeedsFullRepaintInBacking;
}
if (isRelayoutingSubtree && layer->isPaginated())
flags |= RenderLayer::UpdatePagination;
return flags;
}
Pagination::Mode paginationModeForRenderStyle(RenderStyle* style)
{
EOverflow overflow = style->overflowY();
if (overflow != OPAGEDX && overflow != OPAGEDY)
return Pagination::Unpaginated;
bool isHorizontalWritingMode = style->isHorizontalWritingMode();
TextDirection textDirection = style->direction();
WritingMode writingMode = style->writingMode();
// paged-x always corresponds to LeftToRightPaginated or RightToLeftPaginated. If the WritingMode
// is horizontal, then we use TextDirection to choose between those options. If the WritingMode
// is vertical, then the direction of the verticality dictates the choice.
if (overflow == OPAGEDX) {
if ((isHorizontalWritingMode && textDirection == LTR) || writingMode == LeftToRightWritingMode)
return Pagination::LeftToRightPaginated;
return Pagination::RightToLeftPaginated;
}
// paged-y always corresponds to TopToBottomPaginated or BottomToTopPaginated. If the WritingMode
// is horizontal, then the direction of the horizontality dictates the choice. If the WritingMode
// is vertical, then we use TextDirection to choose between those options.
if (writingMode == TopToBottomWritingMode || (!isHorizontalWritingMode && textDirection == RTL))
return Pagination::TopToBottomPaginated;
return Pagination::BottomToTopPaginated;
}
FrameView::FrameView(Frame* frame)
: m_frame(frame)
, m_canHaveScrollbars(true)
, m_slowRepaintObjectCount(0)
, m_layoutTimer(this, &FrameView::layoutTimerFired)
, m_layoutRoot(0)
, m_inSynchronousPostLayout(false)
, m_postLayoutTasksTimer(this, &FrameView::postLayoutTimerFired)
, m_isTransparent(false)
, m_baseBackgroundColor(Color::white)
, m_mediaType("screen")
, m_actionScheduler(adoptPtr(new FrameActionScheduler))
, m_overflowStatusDirty(true)
, m_viewportRenderer(0)
, m_wasScrolledByUser(false)
, m_inProgrammaticScroll(false)
, m_safeToPropagateScrollToParent(true)
, m_deferredRepaintTimer(this, &FrameView::deferredRepaintTimerFired)
, m_disableRepaints(0)
, m_isTrackingRepaints(false)
, m_shouldUpdateWhileOffscreen(true)
, m_deferSetNeedsLayouts(0)
, m_setNeedsLayoutWasDeferred(false)
, m_scrollCorner(0)
, m_shouldAutoSize(false)
, m_inAutoSize(false)
, m_didRunAutosize(false)
, m_headerHeight(0)
, m_footerHeight(0)
, m_milestonesPendingPaint(0)
#if ENABLE(CSS_FILTERS)
, m_hasSoftwareFilters(false)
#endif
{
init();
// FIXME: Can m_frame ever be null here?
if (!m_frame)
return;
Page* page = m_frame->page();
if (!page)
return;
if (m_frame == page->mainFrame()) {
ScrollableArea::setVerticalScrollElasticity(ScrollElasticityAllowed);
ScrollableArea::setHorizontalScrollElasticity(ScrollElasticityAllowed);
}
}
PassRefPtr<FrameView> FrameView::create(Frame* frame)
{
RefPtr<FrameView> view = adoptRef(new FrameView(frame));
view->show();
return view.release();
}
PassRefPtr<FrameView> FrameView::create(Frame* frame, const IntSize& initialSize)
{
RefPtr<FrameView> view = adoptRef(new FrameView(frame));
view->Widget::setFrameRect(IntRect(view->location(), initialSize));
view->show();
return view.release();
}
FrameView::~FrameView()
{
if (m_postLayoutTasksTimer.isActive()) {
m_postLayoutTasksTimer.stop();
m_actionScheduler->clear();
}
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_actionScheduler->isEmpty());
if (m_frame) {
ASSERT(m_frame->view() != this || !m_frame->contentRenderer());
RenderPart* renderer = m_frame->ownerRenderer();
if (renderer && renderer->widget() == this)
renderer->setWidget(0);
}
}
void FrameView::reset()
{
m_cannotBlitToWindow = false;
m_isOverlapped = false;
m_contentIsOpaque = false;
m_borderX = 30;
m_borderY = 30;
m_layoutTimer.stop();
m_layoutRoot = 0;
m_delayedLayout = false;
m_doFullRepaint = true;
m_layoutSchedulingEnabled = true;
m_inLayout = false;
m_doingPreLayoutStyleUpdate = false;
m_inSynchronousPostLayout = false;
m_layoutCount = 0;
m_nestedLayoutCount = 0;
m_postLayoutTasksTimer.stop();
m_firstLayout = true;
m_firstLayoutCallbackPending = false;
m_wasScrolledByUser = false;
m_safeToPropagateScrollToParent = true;
m_lastViewportSize = IntSize();
m_lastZoomFactor = 1.0f;
m_deferringRepaints = 0;
m_repaintCount = 0;
m_repaintRects.clear();
m_deferredRepaintDelay = s_initialDeferredRepaintDelayDuringLoading;
m_deferredRepaintTimer.stop();
m_isTrackingRepaints = false;
m_trackedRepaintRects.clear();
m_lastPaintTime = 0;
m_paintBehavior = PaintBehaviorNormal;
m_isPainting = false;
m_visuallyNonEmptyCharacterCount = 0;
m_visuallyNonEmptyPixelCount = 0;
m_isVisuallyNonEmpty = false;
m_firstVisuallyNonEmptyLayoutCallbackPending = true;
m_maintainScrollPositionAnchor = 0;
m_disableRepaints = 0;
}
void FrameView::removeFromAXObjectCache()
{
if (AXObjectCache* cache = axObjectCache())
cache->remove(this);
}
void FrameView::clearFrame()
{
m_frame = 0;
}
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::resetScrollbarsAndClearContentsSize()
{
resetScrollbars();
setScrollbarsSuppressed(true);
setContentsSize(IntSize());
setScrollbarsSuppressed(false);
}
void FrameView::init()
{
reset();
m_margins = LayoutSize(-1, -1); // undefined
m_size = LayoutSize();
// Propagate the marginwidth/height and scrolling modes to the view.
Element* ownerElement = m_frame ? m_frame->ownerElement() : 0;
if (ownerElement && (ownerElement->hasTagName(frameTag) || ownerElement->hasTagName(iframeTag))) {
HTMLFrameElementBase* frameElt = static_cast<HTMLFrameElementBase*>(ownerElement);
if (frameElt->scrollingMode() == ScrollbarAlwaysOff)
setCanHaveScrollbars(false);
LayoutUnit marginWidth = frameElt->marginWidth();
LayoutUnit marginHeight = frameElt->marginHeight();
if (marginWidth != -1)
setMarginWidth(marginWidth);
if (marginHeight != -1)
setMarginHeight(marginHeight);
}
}
void FrameView::prepareForDetach()
{
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 && 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 = 0;
}
}
void FrameView::recalculateScrollbarOverlayStyle()
{
ScrollbarOverlayStyle oldOverlayStyle = scrollbarOverlayStyle();
ScrollbarOverlayStyle overlayStyle = ScrollbarOverlayStyleDefault;
Color backgroundColor = documentBackgroundColor();
if (backgroundColor.isValid()) {
// 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()
{
setCanBlitOnScroll(true);
reset();
if (m_frame) {
if (RenderPart* renderer = m_frame->ownerRenderer())
renderer->viewCleared();
}
setScrollbarsSuppressed(true);
}
bool FrameView::didFirstLayout() const
{
return !m_firstLayout;
}
void FrameView::invalidateRect(const IntRect& rect)
{
if (!parent()) {
if (hostWindow())
hostWindow()->invalidateContentsAndRootView(rect, false /*immediate*/);
return;
}
if (!m_frame)
return;
RenderPart* renderer = m_frame->ownerRenderer();
if (!renderer)
return;
IntRect repaintRect = rect;
repaintRect.move(renderer->borderLeft() + renderer->paddingLeft(),
renderer->borderTop() + renderer->paddingTop());
renderer->repaintRectangle(repaintRect);
}
void FrameView::setFrameRect(const IntRect& newRect)
{
IntRect oldRect = frameRect();
if (newRect == oldRect)
return;
#if ENABLE(TEXT_AUTOSIZING)
// Autosized font sizes depend on the width of the viewing area.
if (newRect.width() != oldRect.width()) {
Page* page = m_frame ? m_frame->page() : 0;
if (page && page->mainFrame() == m_frame && page->settings()->textAutosizingEnabled()) {
for (Frame* frame = page->mainFrame(); frame; frame = frame->tree()->traverseNext())
m_frame->document()->textAutosizer()->recalculateMultipliers();
}
}
#endif
ScrollView::setFrameRect(newRect);
updateScrollableAreaSet();
RenderView* renderView = this->renderView();
#if USE(ACCELERATED_COMPOSITING)
if (renderView) {
if (renderView->usesCompositing())
renderView->compositor()->frameViewDidChangeSize();
}
#endif
Document* document = m_frame ? m_frame->document() : 0;
// Viewport-dependent media queries may cause us to need completely different style information.
if (document && document->styleResolverIfExists() && document->styleResolverIfExists()->affectedByViewportChange()) {
document->styleResolverChanged(DeferRecalcStyle);
InspectorInstrumentation::mediaQueryResultChanged(document);
}
sendResizeEventIfNeeded();
}
#if ENABLE(REQUEST_ANIMATION_FRAME)
bool FrameView::scheduleAnimation()
{
if (hostWindow()) {
hostWindow()->scheduleAnimation();
return true;
}
return false;
}
#endif
void FrameView::setMarginWidth(LayoutUnit w)
{
// make it update the rendering area when set
m_margins.setWidth(w);
}
void FrameView::setMarginHeight(LayoutUnit h)
{
// make it update the rendering area when set
m_margins.setHeight(h);
}
bool FrameView::avoidScrollbarCreation() const
{
ASSERT(m_frame);
// with frame flattening no subframe can have scrollbars
// but we also cannot turn scrollbars off as we determine
// our flattening policy using that.
if (!m_frame->ownerElement())
return false;
if (!m_frame->settings() || m_frame->settings()->frameFlatteningEnabled())
return true;
return false;
}
void FrameView::setCanHaveScrollbars(bool canHaveScrollbars)
{
m_canHaveScrollbars = canHaveScrollbars;
ScrollView::setCanHaveScrollbars(canHaveScrollbars);
}
void FrameView::updateCanHaveScrollbars()
{
ScrollbarMode hMode;
ScrollbarMode vMode;
scrollbarModes(hMode, vMode);
if (hMode == ScrollbarAlwaysOff && vMode == ScrollbarAlwaysOff)
setCanHaveScrollbars(false);
else
setCanHaveScrollbars(true);
}
PassRefPtr<Scrollbar> FrameView::createScrollbar(ScrollbarOrientation orientation)
{
if (Settings* settings = m_frame->settings()) {
if (!settings->allowCustomScrollbarInMainFrame() && m_frame->page() && m_frame->page()->mainFrame() == m_frame)
return ScrollView::createScrollbar(orientation);
}
// 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))
return RenderScrollbar::createCustomScrollbar(this, orientation, body);
// 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))
return RenderScrollbar::createCustomScrollbar(this, orientation, docElement);
// If we have an owning iframe/frame element, then it can set the custom scrollbar also.
RenderPart* frameRenderer = m_frame->ownerRenderer();
if (frameRenderer && frameRenderer->style()->hasPseudoStyle(SCROLLBAR))
return RenderScrollbar::createCustomScrollbar(this, orientation, 0, m_frame.get());
// 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;
m_deferSetNeedsLayouts++;
ScrollView::setContentsSize(size);
ScrollView::contentsResized();
Page* page = frame() ? frame()->page() : 0;
if (!page)
return;
updateScrollableAreaSet();
page->chrome()->contentsSizeChanged(frame(), size); //notify only
m_deferSetNeedsLayouts--;
if (!m_deferSetNeedsLayouts)
m_setNeedsLayoutWasDeferred = false; // FIXME: Find a way to make the deferred layout actually happen.
}
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::applyOverflowToViewport(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.
// To combat the inability to scroll on a page with overflow:hidden on the root when scaled, disregard hidden when
// there is a frameScaleFactor that is greater than one on the main frame. Also disregard hidden if there is a
// header or footer.
bool overrideHidden = (m_frame->page() && m_frame->page()->mainFrame() == m_frame && m_frame->frameScaleFactor() > 1)
|| (m_frame->page() && m_frame->page()->mainFrame() == m_frame && (headerHeight() || footerHeight()));
EOverflow overflowX = o->style()->overflowX();
EOverflow overflowY = o->style()->overflowY();
#if ENABLE(SVG)
if (o->isSVGRoot()) {
// overflow is ignored in stand-alone SVG documents.
if (!toRenderSVGRoot(o)->isEmbeddedThroughFrameContainingSVGDocument())
return;
overflowX = OHIDDEN;
overflowY = OHIDDEN;
}
#endif
switch (overflowX) {
case OHIDDEN:
if (overrideHidden)
hMode = ScrollbarAuto;
else
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 (overrideHidden)
vMode = ScrollbarAuto;
else
vMode = ScrollbarAlwaysOff;
break;
case OSCROLL:
vMode = ScrollbarAlwaysOn;
break;
case OAUTO:
vMode = ScrollbarAuto;
break;
default:
// Don't set it at all. Values of OPAGEDX and OPAGEDY are handled by applyPaginationToViewPort().
;
}
m_viewportRenderer = o;
}
void FrameView::applyPaginationToViewport()
{
Document* document = m_frame->document();
Node* documentElement = document->documentElement();
RenderObject* documentRenderer = documentElement ? documentElement->renderer() : 0;
RenderObject* documentOrBodyRenderer = documentRenderer;
Node* body = document->body();
if (body && body->renderer()) {
if (body->hasTagName(bodyTag))
documentOrBodyRenderer = documentRenderer->style()->overflowX() == OVISIBLE && documentElement->hasTagName(htmlTag) ? body->renderer() : documentRenderer;
}
Pagination pagination;
if (!documentOrBodyRenderer) {
setPagination(pagination);
return;
}
EOverflow overflowY = documentOrBodyRenderer->style()->overflowY();
if (overflowY == OPAGEDX || overflowY == OPAGEDY) {
pagination.mode = WebCore::paginationModeForRenderStyle(documentOrBodyRenderer->style());
pagination.gap = static_cast<unsigned>(documentOrBodyRenderer->style()->columnGap());
}
setPagination(pagination);
}
void FrameView::calculateScrollbarModesForLayout(ScrollbarMode& hMode, ScrollbarMode& vMode, ScrollbarModesCalculationStrategy strategy)
{
m_viewportRenderer = 0;
const HTMLFrameOwnerElement* owner = m_frame->ownerElement();
if (owner && (owner->scrollingMode() == ScrollbarAlwaysOff)) {
hMode = ScrollbarAlwaysOff;
vMode = ScrollbarAlwaysOff;
return;
}
if (m_canHaveScrollbars || strategy == RulesFromWebContentOnly) {
hMode = ScrollbarAuto;
// Seamless documents begin with heights of 0; we special case that here
// to correctly render documents that don't need scrollbars.
IntSize fullVisibleSize = visibleContentRect(IncludeScrollbars).size();
bool isSeamlessDocument = frame() && frame()->document() && frame()->document()->shouldDisplaySeamlesslyWithParent();
vMode = (isSeamlessDocument && !fullVisibleSize.height()) ? ScrollbarAlwaysOff : ScrollbarAuto;
} else {
hMode = ScrollbarAlwaysOff;
vMode = ScrollbarAlwaysOff;
}
if (!m_layoutRoot) {
Document* document = m_frame->document();
Node* documentElement = document->documentElement();
RenderObject* rootRenderer = documentElement ? documentElement->renderer() : 0;
Node* body = document->body();
if (body && body->renderer()) {
if (body->hasTagName(framesetTag) && m_frame->settings() && !m_frame->settings()->frameFlatteningEnabled()) {
vMode = ScrollbarAlwaysOff;
hMode = ScrollbarAlwaysOff;
} else if (body->hasTagName(bodyTag)) {
// It's sufficient to just check the X overflow,
// since it's illegal to have visible in only one direction.
RenderObject* o = rootRenderer->style()->overflowX() == OVISIBLE && document->documentElement()->hasTagName(htmlTag) ? body->renderer() : rootRenderer;
applyOverflowToViewport(o, hMode, vMode);
}
} else if (rootRenderer)
applyOverflowToViewport(rootRenderer, hMode, vMode);
}
}
#if USE(ACCELERATED_COMPOSITING)
void FrameView::updateCompositingLayersAfterStyleChange()
{
RenderView* renderView = this->renderView();
if (!renderView)
return;
// If we expect to update compositing after an incipient layout, don't do so here.
if (m_doingPreLayoutStyleUpdate || layoutPending() || renderView->needsLayout())
return;
// This call will make sure the cached hasAcceleratedCompositing is updated from the pref
renderView->compositor()->cacheAcceleratedCompositingFlags();
renderView->compositor()->updateCompositingLayers(CompositingUpdateAfterStyleChange);
}
void FrameView::updateCompositingLayersAfterLayout()
{
RenderView* renderView = this->renderView();
if (!renderView)
return;
// This call will make sure the cached hasAcceleratedCompositing is updated from the pref
renderView->compositor()->cacheAcceleratedCompositingFlags();
renderView->compositor()->updateCompositingLayers(CompositingUpdateAfterLayout);
}
void FrameView::clearBackingStores()
{
RenderView* renderView = this->renderView();
if (!renderView)
return;
RenderLayerCompositor* compositor = renderView->compositor();
ASSERT(compositor->inCompositingMode());
compositor->enableCompositingMode(false);
compositor->clearBackingForAllLayers();
}
void FrameView::restoreBackingStores()
{
RenderView* renderView = this->renderView();
if (!renderView)
return;
RenderLayerCompositor* compositor = renderView->compositor();
compositor->enableCompositingMode(true);
compositor->updateCompositingLayers(CompositingUpdateAfterLayout);
}
bool FrameView::usesCompositedScrolling() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return false;
if (m_frame->settings() && m_frame->settings()->compositedScrollingForFramesEnabled())
return renderView->compositor()->inForcedCompositingMode();
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();
}
TiledBacking* FrameView::tiledBacking()
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
RenderLayerBacking* backing = renderView->layer()->backing();
if (!backing)
return 0;
return backing->graphicsLayer()->tiledBacking();
}
uint64_t FrameView::scrollLayerID() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
RenderLayerBacking* backing = renderView->layer()->backing();
if (!backing)
return 0;
return backing->scrollLayerID();
}
#if ENABLE(RUBBER_BANDING)
GraphicsLayer* FrameView::layerForOverhangAreas() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
return renderView->compositor()->layerForOverhangAreas();
}
GraphicsLayer* FrameView::setWantsLayerForTopOverHangArea(bool wantsLayer) const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
return renderView->compositor()->updateLayerForTopOverhangArea(wantsLayer);
}
GraphicsLayer* FrameView::setWantsLayerForBottomOverHangArea(bool wantsLayer) const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
return renderView->compositor()->updateLayerForBottomOverhangArea(wantsLayer);
}
GraphicsLayer* FrameView::setWantsLayerForHeader(bool wantsLayer) const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
ASSERT(m_frame == m_frame->page()->mainFrame());
return renderView->compositor()->updateLayerForHeader(wantsLayer);
}
GraphicsLayer* FrameView::setWantsLayerForFooter(bool wantsLayer) const
{
RenderView* renderView = this->renderView();
if (!renderView)
return 0;
ASSERT(m_frame == m_frame->page()->mainFrame());
return renderView->compositor()->updateLayerForFooter(wantsLayer);
}
#endif // ENABLE(RUBBER_BANDING)
bool FrameView::flushCompositingStateForThisFrame(Frame* rootFrameForFlush)
{
RenderView* renderView = this->renderView();
if (!renderView)
return true; // We don't want to keep trying to update layers if we have no renderer.
ASSERT(m_frame->view() == this);
// If we sync compositing layers when a layout is pending, we may cause painting of compositing
// layer content to occur before layout has happened, which will cause paintContents() to bail.
if (needsLayout())
return false;
// If we sync compositing layers and allow the repaint to be deferred, there is time for a
// visible flash to occur. Instead, stop the deferred repaint timer and repaint immediately.
flushDeferredRepaints();
renderView->compositor()->flushPendingLayerChanges(rootFrameForFlush == m_frame);
return true;
}
void FrameView::setNeedsOneShotDrawingSynchronization()
{
Page* page = frame() ? frame()->page() : 0;
if (page)
page->chrome()->client()->setNeedsOneShotDrawingSynchronization();
}
#endif // USE(ACCELERATED_COMPOSITING)
void FrameView::setHeaderHeight(int headerHeight)
{
if (m_frame && m_frame->page())
ASSERT(m_frame == m_frame->page()->mainFrame());
m_headerHeight = headerHeight;
if (RenderView* renderView = this->renderView())
renderView->setNeedsLayout(true);
}
void FrameView::setFooterHeight(int footerHeight)
{
if (m_frame && m_frame->page())
ASSERT(m_frame == m_frame->page()->mainFrame());
m_footerHeight = footerHeight;
if (RenderView* renderView = this->renderView())
renderView->setNeedsLayout(true);
}
bool FrameView::hasCompositedContent() const
{
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* renderView = this->renderView())
return renderView->compositor()->inCompositingMode();
#endif
return false;
}
bool FrameView::hasCompositedContentIncludingDescendants() const
{
#if USE(ACCELERATED_COMPOSITING)
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext(m_frame.get())) {
RenderView* renderView = frame->contentRenderer();
RenderLayerCompositor* compositor = renderView ? renderView->compositor() : 0;
if (compositor) {
if (compositor->inCompositingMode())
return true;
if (!RenderLayerCompositor::allowsIndependentlyCompositedFrames(this))
break;
}
}
#endif
return false;
}
bool FrameView::hasCompositingAncestor() const
{
#if USE(ACCELERATED_COMPOSITING)
for (Frame* frame = m_frame->tree()->parent(); frame; frame = frame->tree()->parent()) {
if (FrameView* view = frame->view()) {
if (view->hasCompositedContent())
return true;
}
}
#endif
return false;
}
// Sometimes (for plug-ins) we need to eagerly go into compositing mode.
void FrameView::enterCompositingMode()
{
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* renderView = this->renderView()) {
renderView->compositor()->enableCompositingMode();
if (!needsLayout())
renderView->compositor()->scheduleCompositingLayerUpdate();
}
#endif
}
bool FrameView::isEnclosedInCompositingLayer() const
{
#if USE(ACCELERATED_COMPOSITING)
RenderObject* frameOwnerRenderer = m_frame->ownerRenderer();
if (frameOwnerRenderer && frameOwnerRenderer->containerForRepaint())
return true;
if (FrameView* parentView = parentFrameView())
return parentView->isEnclosedInCompositingLayer();
#endif
return false;
}
bool FrameView::flushCompositingStateIncludingSubframes()
{
#if USE(ACCELERATED_COMPOSITING)
bool allFramesFlushed = flushCompositingStateForThisFrame(m_frame.get());
for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->traverseNext(m_frame.get())) {
bool flushed = child->view()->flushCompositingStateForThisFrame(m_frame.get());
allFramesFlushed &= flushed;
}
return allFramesFlushed;
#else // USE(ACCELERATED_COMPOSITING)
return true;
#endif
}
bool FrameView::isSoftwareRenderable() const
{
#if USE(ACCELERATED_COMPOSITING)
RenderView* renderView = this->renderView();
return !renderView || !renderView->compositor()->has3DContent();
#else
return true;
#endif
}
void FrameView::didMoveOnscreen()
{
contentAreaDidShow();
}
void FrameView::willMoveOffscreen()
{
contentAreaDidHide();
}
void FrameView::setIsInWindow(bool isInWindow)
{
if (RenderView* renderView = this->renderView())
renderView->setIsInWindow(isInWindow);
if (isInWindow) {
// Drawing models which cache painted content while out-of-window (WebKit2's composited drawing areas, etc.)
// require that we repaint animated images to kickstart the animation loop.
CachedImage::resumeAnimatingImagesForLoader(frame()->document()->cachedResourceLoader());
}
}
RenderObject* FrameView::layoutRoot(bool onlyDuringLayout) const
{
return onlyDuringLayout && layoutPending() ? 0 : m_layoutRoot;
}
static inline void collectFrameViewChildren(FrameView* frameView, Vector<RefPtr<FrameView> >& frameViews)
{
const HashSet<RefPtr<Widget> >* viewChildren = frameView->children();
ASSERT(viewChildren);
const HashSet<RefPtr<Widget> >::iterator end = viewChildren->end();
for (HashSet<RefPtr<Widget> >::iterator current = viewChildren->begin(); current != end; ++current) {
Widget* widget = (*current).get();
if (widget->isFrameView())
frameViews.append(toFrameView(widget));
}
}
inline void FrameView::forceLayoutParentViewIfNeeded()
{
#if ENABLE(SVG)
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->setNeedsLayoutAndPrefWidthsRecalc();
// Synchronously enter layout, to layout the view containing the host object/embed/iframe.
ASSERT(frameView);
frameView->layout();
#endif
}
void FrameView::layout(bool allowSubtree)
{
if (m_inLayout)
return;
// 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);
bool inChildFrameLayoutWithFrameFlattening = isInChildFrameWithFrameFlattening();
if (inChildFrameLayoutWithFrameFlattening) {
if (doLayoutWithFrameFlattening(allowSubtree))
return;
}
m_layoutTimer.stop();
m_delayedLayout = false;
m_setNeedsLayoutWasDeferred = false;
if (!m_frame) {
// FIXME: Do we need to set m_size.width here?
// FIXME: Should we set m_size.height here too?
m_size.setWidth(layoutWidth());
return;
}
// we shouldn't enter layout() while painting
ASSERT(!isPainting());
if (isPainting())
return;
InspectorInstrumentationCookie cookie = InspectorInstrumentation::willLayout(m_frame.get());
if (!allowSubtree && m_layoutRoot) {
m_layoutRoot->markContainingBlocksForLayout(false);
m_layoutRoot = 0;
}
ASSERT(m_frame->view() == this);
Document* document = m_frame->document();
ASSERT(!document->inPageCache());
bool subtree;
RenderObject* root;
{
TemporaryChange<bool> changeSchedulingEnabled(m_layoutSchedulingEnabled, false);
if (!m_nestedLayoutCount && !m_inSynchronousPostLayout && m_postLayoutTasksTimer.isActive() && !inChildFrameLayoutWithFrameFlattening) {
// 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->evaluateMediaQueryList();
// If there is any pagination to apply, it will affect the RenderView's style, so we should
// take care of that now.
applyPaginationToViewport();
// Always ensure our style info is up-to-date. This can happen in situations where
// the layout beats any sort of style recalc update that needs to occur.
TemporaryChange<bool> changeDoingPreLayoutStyleUpdate(m_doingPreLayoutStyleUpdate, true);
document->updateStyleIfNeeded();
subtree = m_layoutRoot;
// 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;
root = subtree ? m_layoutRoot : document->renderer();
if (!root) {
// FIXME: Do we need to set m_size here?
return;
}
} // Reset m_layoutSchedulingEnabled to its previous value.
// The only reason the scoping was closed here is allow fontCachePurgePreventer
// to outlive the change and reset of m_layoutSchedulingEnabled.
FontCachePurgePreventer fontCachePurgePreventer;
RenderLayer* layer;
{
TemporaryChange<bool> changeSchedulingEnabled(m_layoutSchedulingEnabled, false);
m_nestedLayoutCount++;
if (!m_layoutRoot) {
Document* document = m_frame->document();
Node* body = document->body();
if (body && body->renderer()) {
if (body->hasTagName(framesetTag) && m_frame->settings() && !m_frame->settings()->frameFlatteningEnabled()) {
body->renderer()->setChildNeedsLayout(true);
} else if (body->hasTagName(bodyTag)) {
if (!m_firstLayout && m_size.height() != layoutHeight() && body->renderer()->enclosingBox()->stretchesToViewport())
body->renderer()->setChildNeedsLayout(true);
}
}
#ifdef INSTRUMENT_LAYOUT_SCHEDULING
if (m_firstLayout && !m_frame->ownerElement())
printf("Elapsed time before first layout: %d\n", document->elapsedTime());
#endif
}
autoSizeIfEnabled();
ScrollbarMode hMode;
ScrollbarMode vMode;
calculateScrollbarModesForLayout(hMode, vMode);
m_doFullRepaint = !subtree && (m_firstLayout || toRenderView(root)->printing());
if (!subtree) {
// Now set our scrollbar state for the layout.
ScrollbarMode currentHMode = horizontalScrollbarMode();
ScrollbarMode currentVMode = verticalScrollbarMode();
if (m_firstLayout || (hMode != currentHMode || vMode != currentVMode)) {
if (m_firstLayout) {
setScrollbarsSuppressed(true);
m_firstLayout = false;
m_firstLayoutCallbackPending = true;
if (useFixedLayout() && !fixedLayoutSize().isEmpty() && delegatesScrolling())
m_lastViewportSize = fixedLayoutSize();
else
m_lastViewportSize = visibleContentRect(IncludeScrollbars).size();
m_lastZoomFactor = root->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
setScrollbarModes(hMode, vMode);
}
LayoutSize oldSize = m_size;
m_size = LayoutSize(layoutWidth(), layoutHeight());
if (oldSize != m_size) {
m_doFullRepaint = true;
if (!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(true);
else if (rootRenderer && rootRenderer->stretchesToViewport())
rootRenderer->setChildNeedsLayout(true);
}
}
}
layer = root->enclosingLayer();
m_actionScheduler->pause();
{
bool disableLayoutState = false;
if (subtree) {
RenderView* view = root->view();
disableLayoutState = view->shouldDisableLayoutStateForSubtree(root);
view->pushLayoutState(root);
}
LayoutStateDisabler layoutStateDisabler(disableLayoutState ? root->view() : 0);
m_inLayout = true;
beginDeferredRepaints();
forceLayoutParentViewIfNeeded();
root->layout();
#if ENABLE(TEXT_AUTOSIZING)
bool autosized = document->textAutosizer()->processSubtree(root);
if (autosized && root->needsLayout())
root->layout();
#endif
endDeferredRepaints();
m_inLayout = false;
if (subtree)
root->view()->popLayoutState(root);
}
m_layoutRoot = 0;
} // Reset m_layoutSchedulingEnabled to its previous value.
bool neededFullRepaint = m_doFullRepaint;
if (!subtree && !toRenderView(root)->printing())
adjustViewSize();
m_doFullRepaint = neededFullRepaint;
// Now update the positions of all layers.
beginDeferredRepaints();
if (m_doFullRepaint)
root->view()->repaint(); // FIXME: This isn't really right, since the RenderView doesn't fully encompass the visibleContentRect(). It just happens
// to work out most of the time, since first layouts and printing don't have you scrolled anywhere.
layer->updateLayerPositionsAfterLayout(renderView()->layer(), updateLayerPositionFlags(layer, subtree, m_doFullRepaint));
endDeferredRepaints();
#if USE(ACCELERATED_COMPOSITING)
updateCompositingLayersAfterLayout();
#endif
m_layoutCount++;
#if PLATFORM(MAC)
if (AXObjectCache* cache = root->document()->existingAXObjectCache())
cache->postNotification(root, AXObjectCache::AXLayoutComplete, true);
#endif
#if ENABLE(DASHBOARD_SUPPORT) || ENABLE(DRAGGABLE_REGION)
updateAnnotatedRegions();
#endif
ASSERT(!root->needsLayout());
updateCanBlitOnScrollRecursively();
if (document->hasListenerType(Document::OVERFLOWCHANGED_LISTENER))
updateOverflowStatus(layoutWidth() < contentsWidth(),
layoutHeight() < contentsHeight());
if (!m_postLayoutTasksTimer.isActive()) {
if (!m_inSynchronousPostLayout) {
if (inChildFrameLayoutWithFrameFlattening) {
if (RenderView* renderView = this->renderView())
renderView->updateWidgetPositions();
} else {
m_inSynchronousPostLayout = true;
// Calls resumeScheduledEvents()
performPostLayoutTasks();
m_inSynchronousPostLayout = false;
}
}
if (!m_postLayoutTasksTimer.isActive() && (needsLayout() || m_inSynchronousPostLayout || inChildFrameLayoutWithFrameFlattening)) {
// 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);
if (needsLayout()) {
m_actionScheduler->pause();
layout();
}
}
} else {
m_actionScheduler->resume();
}
InspectorInstrumentation::didLayout(cookie, root);
m_nestedLayoutCount--;
if (m_nestedLayoutCount)
return;
Page* page = frame() ? frame()->page() : 0;
if (!page)
return;
page->chrome()->client()->layoutUpdated(frame());
}
RenderBox* FrameView::embeddedContentBox() const
{
#if ENABLE(SVG)
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);
#endif
return 0;
}
void FrameView::addWidgetToUpdate(RenderObject* object)
{
if (!m_widgetUpdateSet)
m_widgetUpdateSet = adoptPtr(new RenderObjectSet);
// Tell the DOM element that it needs a widget update.
Node* node = object->node();
if (node->hasTagName(objectTag) || node->hasTagName(embedTag)) {
HTMLPlugInImageElement* pluginElement = toHTMLPlugInImageElement(node);
if (!pluginElement->needsCheckForSizeChange())
pluginElement->setNeedsWidgetUpdate(true);
}
m_widgetUpdateSet->add(object);
}
void FrameView::removeWidgetToUpdate(RenderObject* object)
{
if (!m_widgetUpdateSet)
return;
m_widgetUpdateSet->remove(object);
}
void FrameView::setMediaType(const String& mediaType)
{
m_mediaType = mediaType;
}
String FrameView::mediaType() const
{
// See if we have an override type.
String overrideType = m_frame->loader()->client()->overrideMediaType();
InspectorInstrumentation::applyEmulatedMedia(m_frame.get(), &overrideType);
if (!overrideType.isNull())
return 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 = String();
}
}
bool FrameView::useSlowRepaints(bool considerOverlap) const
{
bool mustBeSlow = m_slowRepaintObjectCount > 0 || (platformWidget() && hasViewportConstrainedObjects());
// FIXME: WidgetMac.mm makes the assumption that useSlowRepaints ==
// m_contentIsOpaque, so don't take the fast path for composited layers
// if they are a platform widget in order to get painting correctness
// for transparent layers. See the comment in WidgetMac::paint.
if (contentsInCompositedLayer() && !platformWidget())
return mustBeSlow;
bool isOverlapped = m_isOverlapped && considerOverlap;
if (mustBeSlow || m_cannotBlitToWindow || isOverlapped || !m_contentIsOpaque)
return true;
if (FrameView* parentView = parentFrameView())
return parentView->useSlowRepaints(considerOverlap);
return false;
}
bool FrameView::useSlowRepaintsIfNotOverlapped() const
{
return useSlowRepaints(false);
}
void FrameView::updateCanBlitOnScrollRecursively()
{
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext(m_frame.get())) {
if (FrameView* view = frame->view())
view->setCanBlitOnScroll(!view->useSlowRepaints());
}
}
bool FrameView::contentsInCompositedLayer() const
{
#if USE(ACCELERATED_COMPOSITING)
RenderView* renderView = this->renderView();
if (renderView && renderView->isComposited()) {
GraphicsLayer* layer = renderView->layer()->backing()->graphicsLayer();
if (layer && layer->drawsContent())
return true;
}
#endif
return false;
}
void FrameView::setCannotBlitToWindow()
{
m_cannotBlitToWindow = true;
updateCanBlitOnScrollRecursively();
}
void FrameView::addSlowRepaintObject()
{
if (!m_slowRepaintObjectCount++) {
updateCanBlitOnScrollRecursively();
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) {
updateCanBlitOnScrollRecursively();
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 (platformWidget())
updateCanBlitOnScrollRecursively();
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);
}
// FIXME: In addFixedObject() we only call this if there's a platform widget,
// why isn't the same check being made here?
updateCanBlitOnScrollRecursively();
}
}
LayoutRect FrameView::viewportConstrainedVisibleContentRect() const
{
LayoutRect viewportRect = visibleContentRect();
viewportRect.setLocation(toPoint(scrollOffsetForFixedPosition()));
return viewportRect;
}
IntSize FrameView::scrollOffsetForFixedPosition(const IntRect& visibleContentRect, const IntSize& totalContentsSize, const IntPoint& scrollPosition, const IntPoint& scrollOrigin, float frameScaleFactor, bool fixedElementsLayoutRelativeToFrame, int headerHeight, int footerHeight)
{
IntPoint constrainedPosition = ScrollableArea::constrainScrollPositionForOverhang(visibleContentRect, totalContentsSize, scrollPosition, scrollOrigin, headerHeight, footerHeight);
IntSize maxSize = totalContentsSize - visibleContentRect.size();
float dragFactorX = (fixedElementsLayoutRelativeToFrame || !maxSize.width()) ? 1 : (totalContentsSize.width() - visibleContentRect.width() * frameScaleFactor) / maxSize.width();
float dragFactorY = (fixedElementsLayoutRelativeToFrame || !maxSize.height()) ? 1 : (totalContentsSize.height() - visibleContentRect.height() * frameScaleFactor) / maxSize.height();
return IntSize(constrainedPosition.x() * dragFactorX / frameScaleFactor, constrainedPosition.y() * dragFactorY / frameScaleFactor);
}
IntSize FrameView::scrollOffsetForFixedPosition() const
{
IntRect visibleContentRect = this->visibleContentRect();
IntSize totalContentsSize = this->totalContentsSize();
IntPoint scrollPosition = this->scrollPosition();
IntPoint scrollOrigin = this->scrollOrigin();
float frameScaleFactor = m_frame ? m_frame->frameScaleFactor() : 1;
return scrollOffsetForFixedPosition(visibleContentRect, totalContentsSize, scrollPosition, scrollOrigin, frameScaleFactor, fixedElementsLayoutRelativeToFrame(), headerHeight(), footerHeight());
}
bool FrameView::fixedElementsLayoutRelativeToFrame() const
{
ASSERT(m_frame);
if (!m_frame->settings())
return false;
return m_frame->settings()->fixedElementsLayoutRelativeToFrame();
}
IntPoint FrameView::lastKnownMousePosition() const
{
return m_frame ? m_frame->eventHandler()->lastKnownMousePosition() : IntPoint();
}
bool FrameView::isHandlingWheelEvent() const
{
return m_frame ? m_frame->eventHandler()->isHandlingWheelEvent() : false;
}
bool FrameView::shouldSetCursor() const
{
Page* page = frame()->page();
return page && page->isOnscreen() && page->focusController()->isActive();
}
bool FrameView::scrollContentsFastPath(const IntSize& scrollDelta, const IntRect& rectToScroll, const IntRect& clipRect)
{
if (!m_viewportConstrainedObjects || m_viewportConstrainedObjects->isEmpty()) {
hostWindow()->scroll(scrollDelta, rectToScroll, clipRect);
return true;
}
const bool isCompositedContentLayer = contentsInCompositedLayer();
// 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;
if (!renderer->style()->hasViewportConstrainedPosition())
continue;
#if USE(ACCELERATED_COMPOSITING)
if (renderer->isComposited())
continue;
#endif
// Fixed items should always have layers.
ASSERT(renderer->hasLayer());
RenderLayer* layer = toRenderBoxModelObject(renderer)->layer();
#if USE(ACCELERATED_COMPOSITING)
if (layer->viewportConstrainedNotCompositedReason() == RenderLayer::NotCompositedForBoundsOutOfView
|| layer->viewportConstrainedNotCompositedReason() == RenderLayer::NotCompositedForNoVisibleContent) {
// Don't invalidate for invisible fixed layers.
continue;
}
#endif
#if ENABLE(CSS_FILTERS)
if (layer->hasAncestorWithFilterOutsets()) {
// 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.
return false;
}
#endif
IntRect updateRect = pixelSnappedIntRect(layer->repaintRectIncludingNonCompositingDescendants());
updateRect = contentsToRootView(updateRect);
if (!isCompositedContentLayer && clipsRepaints())
updateRect.intersect(rectToScroll);
if (!updateRect.isEmpty())
regionToUpdate.unite(updateRect);
}
// 1) scroll
hostWindow()->scroll(scrollDelta, rectToScroll, clipRect);
// 2) update the area of fixed objects that has been invalidated
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);
#if USE(ACCELERATED_COMPOSITING)
if (isCompositedContentLayer) {
updateRect = rootViewToContents(updateRect);
ASSERT(renderView());
renderView()->layer()->setBackingNeedsRepaintInRect(updateRect);
continue;
}
#endif
if (clipsRepaints())
updateRect.intersect(rectToScroll);
hostWindow()->invalidateContentsAndRootView(updateRect, false);
}
return true;
}
void FrameView::scrollContentsSlowPath(const IntRect& updateRect)
{
#if USE(ACCELERATED_COMPOSITING)
if (contentsInCompositedLayer()) {
IntRect updateRect = visibleContentRect();
// Make sure to "apply" the scale factor here since we're converting from frame view
// coordinates to layer backing coordinates.
updateRect.scale(1 / m_frame->frameScaleFactor());
ASSERT(renderView());
renderView()->layer()->setBackingNeedsRepaintInRect(updateRect);
}
if (RenderPart* frameRenderer = m_frame->ownerRenderer()) {
if (isEnclosedInCompositingLayer()) {
LayoutRect rect(frameRenderer->borderLeft() + frameRenderer->paddingLeft(),
frameRenderer->borderTop() + frameRenderer->paddingTop(),
visibleWidth(), visibleHeight());
frameRenderer->repaintRectangle(rect);
return;
}
}
#endif
ScrollView::scrollContentsSlowPath(updateRect);
}
// Note that this gets called at painting time.
void FrameView::setIsOverlapped(bool isOverlapped)
{
if (isOverlapped == m_isOverlapped)
return;
m_isOverlapped = isOverlapped;
updateCanBlitOnScrollRecursively();
#if USE(ACCELERATED_COMPOSITING)
if (hasCompositedContentIncludingDescendants()) {
// Overlap can affect compositing tests, so if it changes, we need to trigger
// a layer update in the parent document.
if (Frame* parentFrame = m_frame->tree()->parent()) {
if (RenderView* parentView = parentFrame->contentRenderer()) {
RenderLayerCompositor* compositor = parentView->compositor();
compositor->setCompositingLayersNeedRebuild();
compositor->scheduleCompositingLayerUpdate();
}
}
if (RenderLayerCompositor::allowsIndependentlyCompositedFrames(this)) {
// We also need to trigger reevaluation for this and all descendant frames,
// since a frame uses compositing if any ancestor is compositing.
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext(m_frame.get())) {
if (RenderView* view = frame->contentRenderer()) {
RenderLayerCompositor* compositor = view->compositor();
compositor->setCompositingLayersNeedRebuild();
compositor->scheduleCompositingLayerUpdate();
}
}
}
}
#endif
}
bool FrameView::isOverlappedIncludingAncestors() const
{
if (isOverlapped())
return true;
if (FrameView* parentView = parentFrameView()) {
if (parentView->isOverlapped())
return true;
}
return false;
}
void FrameView::setContentIsOpaque(bool contentIsOpaque)
{
if (contentIsOpaque == m_contentIsOpaque)
return;
m_contentIsOpaque = contentIsOpaque;
updateCanBlitOnScrollRecursively();
}
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 repaint 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 (TextResourceDecoder* decoder = m_frame->document()->decoder())
return scrollToAnchor(decodeURLEscapeSequences(fragmentIdentifier, decoder->encoding()));
return false;
}
bool FrameView::scrollToAnchor(const String& name)
{
ASSERT(m_frame->document());
if (!m_frame->document()->haveStylesheetsLoaded()) {
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 ENABLE(SVG)
if (m_frame->document()->isSVGDocument()) {
if (SVGSVGElement* svg = toSVGDocument(m_frame->document())->rootElement()) {
svg->setupInitialView(name, anchorNode);
if (!anchorNode)
return true;
}
}
#endif
// 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()->setFocusedNode(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()->updateStyleIfNeeded();
// 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)
{
m_frame->document()->updateLayoutIgnorePendingStylesheets();
LayoutRect bounds = element->boundingBox();
int centeringOffsetX = (rect.width() - bounds.width()) / 2;
int centeringOffsetY = (rect.height() - bounds.height()) / 2;
setScrollPosition(IntPoint(bounds.x() - centeringOffsetX - rect.x(), bounds.y() - centeringOffsetY - rect.y()));
}
void FrameView::setScrollPosition(const IntPoint& scrollPoint)
{
TemporaryChange<bool> changeInProgrammaticScroll(m_inProgrammaticScroll, true);
m_maintainScrollPositionAnchor = 0;
IntPoint newScrollPosition = adjustScrollPositionWithinRange(scrollPoint);
if (newScrollPosition == scrollPosition())
return;
if (requestScrollPositionUpdate(newScrollPosition))
return;
ScrollView::setScrollPosition(newScrollPosition);
}
void FrameView::delegatesScrollingDidChange()
{
#if USE(ACCELERATED_COMPOSITING)
// When we switch to delgatesScrolling mode, we should destroy the scrolling/clipping layers in RenderLayerCompositor.
if (hasCompositedContent())
clearBackingStores();
#endif
}
void FrameView::setFixedVisibleContentRect(const IntRect& visibleContentRect)
{
bool visibleContentSizeDidChange = false;
if (visibleContentRect.size() != this->fixedVisibleContentRect().size()) {
// When the viewport size changes or the content is scaled, we need to
// reposition the fixed and sticky positioned elements.
setViewportConstrainedObjectsNeedLayout();
visibleContentSizeDidChange = true;
}
IntSize offset = scrollOffset();
ScrollView::setFixedVisibleContentRect(visibleContentRect);
if (offset != scrollOffset()) {
repaintFixedElementsAfterScrolling();
if (m_frame->page()->settings()->acceleratedCompositingForFixedPositionEnabled())
updateFixedElementsAfterScrolling();
scrollAnimator()->setCurrentPosition(scrollPosition());
scrollPositionChanged();
}
if (visibleContentSizeDidChange) {
// Update the scroll-bars to calculate new page-step size.
updateScrollbars(scrollOffset());
}
frame()->loader()->client()->didChangeScrollOffset();
}
void FrameView::setViewportConstrainedObjectsNeedLayout()
{
if (!hasViewportConstrainedObjects())
return;
ViewportConstrainedObjectSet::const_iterator end = m_viewportConstrainedObjects->end();
for (ViewportConstrainedObjectSet::const_iterator it = m_viewportConstrainedObjects->begin(); it != end; ++it) {
RenderObject* renderer = *it;
renderer->setNeedsLayout(true);
}
}
void FrameView::scrollPositionChangedViaPlatformWidget()
{
repaintFixedElementsAfterScrolling();
updateFixedElementsAfterScrolling();
scrollPositionChanged();
}
void FrameView::scrollPositionChanged()
{
frame()->eventHandler()->sendScrollEvent();
frame()->eventHandler()->dispatchFakeMouseMoveEventSoon();
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* renderView = this->renderView()) {
if (renderView->usesCompositing())
renderView->compositor()->frameViewDidScroll();
}
#endif
}
void FrameView::repaintFixedElementsAfterScrolling()
{
// For fixed position elements, update widget positions and compositing layers after scrolling,
// but only if we're not inside of layout.
if (!m_nestedLayoutCount && hasViewportConstrainedObjects()) {
if (RenderView* renderView = this->renderView()) {
renderView->updateWidgetPositions();
renderView->layer()->updateLayerPositionsAfterDocumentScroll();
}
}
}
bool FrameView::shouldUpdateFixedElementsAfterScrolling()
{
#if ENABLE(THREADED_SCROLLING)
Page* page = m_frame->page();
if (!page)
return true;
// If the scrolling thread is updating the fixed elements, then the FrameView should not update them as well.
if (page->mainFrame() != m_frame)
return true;
ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator();
if (!scrollingCoordinator)
return true;
if (!scrollingCoordinator->supportsFixedPositionLayers())
return true;
if (scrollingCoordinator->shouldUpdateScrollLayerPositionOnMainThread())
return true;
if (inProgrammaticScroll())
return true;
return false;
#endif
return true;
}
void FrameView::updateFixedElementsAfterScrolling()
{
#if USE(ACCELERATED_COMPOSITING)
if (!shouldUpdateFixedElementsAfterScrolling())
return;
if (m_nestedLayoutCount <= 1 && hasViewportConstrainedObjects()) {
if (RenderView* renderView = this->renderView())
renderView->compositor()->updateCompositingLayers(CompositingUpdateOnScroll);
}
#endif
}
bool FrameView::shouldRubberBandInDirection(ScrollDirection direction) const
{
Page* page = frame() ? frame()->page() : 0;
if (!page)
return ScrollView::shouldRubberBandInDirection(direction);
return page->chrome()->client()->shouldRubberBandInDirection(direction);
}
bool FrameView::isRubberBandInProgress() const
{
if (scrollbarsSuppressed())
return false;
// If the scrolling thread updates the scroll position for this FrameView, then we should return
// ScrollingCoordinator::isRubberBandInProgress().
if (Page* page = m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator()) {
if (!scrollingCoordinator->shouldUpdateScrollLayerPositionOnMainThread())
return scrollingCoordinator->isRubberBandInProgress();
}
}
// 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;
}
bool FrameView::requestScrollPositionUpdate(const IntPoint& position)
{
#if ENABLE(THREADED_SCROLLING)
if (TiledBacking* tiledBacking = this->tiledBacking()) {
IntRect visibleRect = visibleContentRect();
visibleRect.setLocation(position);
tiledBacking->prepopulateRect(visibleRect);
}
if (Page* page = m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
return scrollingCoordinator->requestScrollPositionUpdate(this, position);
}
#else
UNUSED_PARAM(position);
#endif
return false;
}
HostWindow* FrameView::hostWindow() const
{
Page* page = frame() ? frame()->page() : 0;
if (!page)
return 0;
return page->chrome();
}
const unsigned cRepaintRectUnionThreshold = 25;
void FrameView::repaintContentRectangle(const IntRect& r, bool immediate)
{
ASSERT(!m_frame->ownerElement());
if (m_isTrackingRepaints) {
IntRect repaintRect = r;
repaintRect.move(-scrollOffset());
m_trackedRepaintRects.append(repaintRect);
}
double delay = m_deferringRepaints ? 0 : adjustedDeferredRepaintDelay();
if ((m_deferringRepaints || m_deferredRepaintTimer.isActive() || delay) && !immediate) {
IntRect paintRect = r;
if (clipsRepaints() && !paintsEntireContents())
paintRect.intersect(visibleContentRect());
if (paintRect.isEmpty())
return;
if (m_repaintCount == cRepaintRectUnionThreshold) {
IntRect unionedRect;
for (unsigned i = 0; i < cRepaintRectUnionThreshold; ++i)
unionedRect.unite(pixelSnappedIntRect(m_repaintRects[i]));
m_repaintRects.clear();
m_repaintRects.append(unionedRect);
}
if (m_repaintCount < cRepaintRectUnionThreshold)
m_repaintRects.append(paintRect);
else
m_repaintRects[0].unite(paintRect);
m_repaintCount++;
if (!m_deferringRepaints)
startDeferredRepaintTimer(delay);
return;
}
if (!shouldUpdate(immediate))
return;
#if USE(TILED_BACKING_STORE)
if (frame()->tiledBackingStore()) {
frame()->tiledBackingStore()->invalidate(r);
return;
}
#endif
ScrollView::repaintContentRectangle(r, immediate);
}
void FrameView::contentsResized()
{
ScrollView::contentsResized();
setNeedsLayout();
}
void FrameView::visibleContentsResized()
{
// We check to make sure the view is attached to a frame() as this method can
// be triggered before the view is attached by Frame::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;
if (!useFixedLayout() && needsLayout())
layout();
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* renderView = this->renderView()) {
if (renderView->usesCompositing())
renderView->compositor()->frameViewDidChangeSize();
}
#endif
}
void FrameView::beginDeferredRepaints()
{
Page* page = m_frame->page();
if (page->mainFrame() != m_frame) {
page->mainFrame()->view()->beginDeferredRepaints();
return;
}
m_deferringRepaints++;
}
void FrameView::endDeferredRepaints()
{
Page* page = m_frame->page();
if (page->mainFrame() != m_frame) {
page->mainFrame()->view()->endDeferredRepaints();
return;
}
ASSERT(m_deferringRepaints > 0);
if (--m_deferringRepaints)
return;
if (m_deferredRepaintTimer.isActive())
return;
if (double delay = adjustedDeferredRepaintDelay()) {
startDeferredRepaintTimer(delay);
return;
}
doDeferredRepaints();
}
void FrameView::startDeferredRepaintTimer(double delay)
{
if (m_deferredRepaintTimer.isActive())
return;
if (m_disableRepaints)
return;
m_deferredRepaintTimer.startOneShot(delay);
}
void FrameView::handleLoadCompleted()
{
// Once loading has completed, allow autoSize one last opportunity to
// reduce the size of the frame.
autoSizeIfEnabled();
if (shouldUseLoadTimeDeferredRepaintDelay())
return;
m_deferredRepaintDelay = s_normalDeferredRepaintDelay;
flushDeferredRepaints();
}
void FrameView::flushDeferredRepaints()
{
if (!m_deferredRepaintTimer.isActive())
return;
m_deferredRepaintTimer.stop();
doDeferredRepaints();
}
void FrameView::doDeferredRepaints()
{
if (m_disableRepaints)
return;
ASSERT(!m_deferringRepaints);
if (!shouldUpdate()) {
m_repaintRects.clear();
m_repaintCount = 0;
return;
}
unsigned size = m_repaintRects.size();
for (unsigned i = 0; i < size; i++) {
#if USE(TILED_BACKING_STORE)
if (frame()->tiledBackingStore()) {
frame()->tiledBackingStore()->invalidate(pixelSnappedIntRect(m_repaintRects[i]));
continue;
}
#endif
ScrollView::repaintContentRectangle(pixelSnappedIntRect(m_repaintRects[i]), false);
}
m_repaintRects.clear();
m_repaintCount = 0;
updateDeferredRepaintDelayAfterRepaint();
}
bool FrameView::shouldUseLoadTimeDeferredRepaintDelay() const
{
// Don't defer after the initial load of the page has been completed.
if (m_frame->tree()->top()->loader()->isComplete())
return false;
Document* document = m_frame->document();
if (!document)
return false;
if (document->parsing())
return true;
if (document->cachedResourceLoader()->requestCount())
return true;
return false;
}
void FrameView::updateDeferredRepaintDelayAfterRepaint()
{
if (!shouldUseLoadTimeDeferredRepaintDelay()) {
m_deferredRepaintDelay = s_normalDeferredRepaintDelay;
return;
}
double incrementedRepaintDelay = m_deferredRepaintDelay + s_deferredRepaintDelayIncrementDuringLoading;
m_deferredRepaintDelay = std::min(incrementedRepaintDelay, s_maxDeferredRepaintDelayDuringLoading);
}
void FrameView::resetDeferredRepaintDelay()
{
m_deferredRepaintDelay = 0;
if (m_deferredRepaintTimer.isActive()) {
m_deferredRepaintTimer.stop();
if (!m_deferringRepaints)
doDeferredRepaints();
}
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* view = renderView())
view->compositor()->disableLayerFlushThrottlingTemporarilyForInteraction();
#endif
}
double FrameView::adjustedDeferredRepaintDelay() const
{
ASSERT(!m_deferringRepaints);
if (!m_deferredRepaintDelay)
return 0;
double timeSinceLastPaint = currentTime() - m_lastPaintTime;
return max(0., m_deferredRepaintDelay - timeSinceLastPaint);
}
void FrameView::deferredRepaintTimerFired(Timer<FrameView>*)
{
doDeferredRepaints();
}
void FrameView::beginDisableRepaints()
{
m_disableRepaints++;
}
void FrameView::endDisableRepaints()
{
ASSERT(m_disableRepaints > 0);
m_disableRepaints--;
}
void FrameView::updateLayerFlushThrottlingInAllFrames()
{
#if USE(ACCELERATED_COMPOSITING)
bool isMainLoadProgressing = m_frame->page()->progress()->isMainLoadProgressing();
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext(m_frame.get())) {
if (RenderView* renderView = frame->contentRenderer())
renderView->compositor()->setLayerFlushThrottlingEnabled(isMainLoadProgressing);
}
#endif
}
void FrameView::adjustTiledBackingCoverage()
{
#if USE(ACCELERATED_COMPOSITING)
RenderView* renderView = this->renderView();
if (renderView && renderView->layer()->backing())
renderView->layer()->backing()->adjustTiledBackingCoverage();
#endif
}
void FrameView::layoutTimerFired(Timer<FrameView>*)
{
#ifdef INSTRUMENT_LAYOUT_SCHEDULING
if (!m_frame->document()->ownerElement())
printf("Layout timer fired at %d\n", m_frame->document()->elapsedTime());
#endif
layout();
}
void FrameView::scheduleRelayout()
{
// FIXME: We should assert the page is not in the page cache, but that is causing
// too many false assertions. See <rdar://problem/7218118>.
ASSERT(m_frame->view() == this);
if (m_layoutRoot) {
m_layoutRoot->markContainingBlocksForLayout(false);
m_layoutRoot = 0;
}
if (!m_layoutSchedulingEnabled)
return;
if (!needsLayout())
return;
if (!m_frame->document()->shouldScheduleLayout())
return;
InspectorInstrumentation::didInvalidateLayout(m_frame.get());
// When frame flattening is enabled, the contents of the frame could affect the layout of the parent frames.
// Also invalidate parent frame starting from the owner element of this frame.
if (m_frame->ownerRenderer() && isInChildFrameWithFrameFlattening())
m_frame->ownerRenderer()->setNeedsLayout(true, MarkContainingBlockChain);
int delay = m_frame->document()->minimumLayoutDelay();
if (m_layoutTimer.isActive() && m_delayedLayout && !delay)
unscheduleRelayout();
if (m_layoutTimer.isActive())
return;
m_delayedLayout = delay != 0;
#ifdef INSTRUMENT_LAYOUT_SCHEDULING
if (!m_frame->document()->ownerElement())
printf("Scheduling layout for %d\n", delay);
#endif
m_layoutTimer.startOneShot(delay * 0.001);
}
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);
RenderView* renderView = this->renderView();
if (renderView && renderView->needsLayout()) {
if (relayoutRoot)
relayoutRoot->markContainingBlocksForLayout(false);
return;
}
if (layoutPending() || !m_layoutSchedulingEnabled) {
if (m_layoutRoot != relayoutRoot) {
if (isObjectAncestorContainerOf(m_layoutRoot, relayoutRoot)) {
// Keep the current root
relayoutRoot->markContainingBlocksForLayout(false, m_layoutRoot);
ASSERT(!m_layoutRoot->container() || !m_layoutRoot->container()->needsLayout());
} else if (m_layoutRoot && isObjectAncestorContainerOf(relayoutRoot, m_layoutRoot)) {
// Re-root at relayoutRoot
m_layoutRoot->markContainingBlocksForLayout(false, relayoutRoot);
m_layoutRoot = relayoutRoot;
ASSERT(!m_layoutRoot->container() || !m_layoutRoot->container()->needsLayout());
InspectorInstrumentation::didInvalidateLayout(m_frame.get());
} else {
// Just do a full relayout
if (m_layoutRoot)
m_layoutRoot->markContainingBlocksForLayout(false);
m_layoutRoot = 0;
relayoutRoot->markContainingBlocksForLayout(false);
InspectorInstrumentation::didInvalidateLayout(m_frame.get());
}
}
} else if (m_layoutSchedulingEnabled) {
int delay = m_frame->document()->minimumLayoutDelay();
m_layoutRoot = relayoutRoot;
ASSERT(!m_layoutRoot->container() || !m_layoutRoot->container()->needsLayout());
InspectorInstrumentation::didInvalidateLayout(m_frame.get());
m_delayedLayout = delay != 0;
m_layoutTimer.startOneShot(delay * 0.001);
}
}
bool FrameView::layoutPending() const
{
return m_layoutTimer.isActive();
}
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.
if (!m_frame)
return false;
RenderView* renderView = this->renderView();
return layoutPending()
|| (renderView && renderView->needsLayout())
|| m_layoutRoot
|| (m_deferSetNeedsLayouts && m_setNeedsLayoutWasDeferred);
}
void FrameView::setNeedsLayout()
{
if (m_deferSetNeedsLayouts) {
m_setNeedsLayoutWasDeferred = true;
return;
}
if (RenderView* renderView = this->renderView())
renderView->setNeedsLayout(true);
}
void FrameView::unscheduleRelayout()
{
if (!m_layoutTimer.isActive())
return;
#ifdef INSTRUMENT_LAYOUT_SCHEDULING
if (!m_frame->document()->ownerElement())
printf("Layout timer unscheduled at %d\n", m_frame->document()->elapsedTime());
#endif
m_layoutTimer.stop();
m_delayedLayout = false;
}
#if ENABLE(REQUEST_ANIMATION_FRAME)
void FrameView::serviceScriptedAnimations(double monotonicAnimationStartTime)
{
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext()) {
frame->view()->serviceScrollAnimations();
frame->animation()->serviceAnimations();
}
Vector<RefPtr<Document> > documents;
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext())
documents.append(frame->document());
for (size_t i = 0; i < documents.size(); ++i)
documents[i]->serviceScriptedAnimations(monotonicAnimationStartTime);
}
#endif
bool FrameView::isTransparent() const
{
return m_isTransparent;
}
void FrameView::setTransparent(bool isTransparent)
{
m_isTransparent = isTransparent;
}
bool FrameView::hasOpaqueBackground() const
{
return !m_isTransparent && !m_baseBackgroundColor.hasAlpha();
}
Color FrameView::baseBackgroundColor() const
{
return m_baseBackgroundColor;
}
void FrameView::setBaseBackgroundColor(const Color& backgroundColor)
{
if (!backgroundColor.isValid())
m_baseBackgroundColor = Color::white;
else
m_baseBackgroundColor = backgroundColor;
recalculateScrollbarOverlayStyle();
}
void FrameView::updateBackgroundRecursively(const Color& backgroundColor, bool transparent)
{
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext(m_frame.get())) {
if (FrameView* view = frame->view()) {
view->setTransparent(transparent);
view->setBaseBackgroundColor(backgroundColor);
}
}
}
bool FrameView::shouldUpdateWhileOffscreen() const
{
return m_shouldUpdateWhileOffscreen;
}
void FrameView::setShouldUpdateWhileOffscreen(bool shouldUpdateWhileOffscreen)
{
m_shouldUpdateWhileOffscreen = shouldUpdateWhileOffscreen;
}
bool FrameView::shouldUpdate(bool immediateRequested) const
{
if (!immediateRequested && isOffscreen() && !shouldUpdateWhileOffscreen())
return false;
return true;
}
void FrameView::scheduleEvent(PassRefPtr<Event> event, PassRefPtr<Node> eventTarget)
{
m_actionScheduler->scheduleEvent(event, eventTarget);
}
void FrameView::pauseScheduledEvents()
{
m_actionScheduler->pause();
}
void FrameView::resumeScheduledEvents()
{
m_actionScheduler->resume();
}
void FrameView::scrollToAnchor()
{
RefPtr<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;
}
void FrameView::updateWidget(RenderObject* object)
{
ASSERT(!object->node() || object->node()->isElementNode());
Element* ownerElement = toElement(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.
ASSERT(m_widgetUpdateSet->contains(object));
if (!ownerElement)
return;
if (object->isEmbeddedObject()) {
RenderEmbeddedObject* embeddedObject = static_cast<RenderEmbeddedObject*>(object);
// No need to update if it's already crashed or known to be missing.
if (embeddedObject->showsUnavailablePluginIndicator())
return;
if (object->isSnapshottedPlugIn()) {
if (ownerElement->hasTagName(objectTag) || ownerElement->hasTagName(embedTag)) {
HTMLPlugInImageElement* pluginElement = toHTMLPlugInImageElement(ownerElement);
pluginElement->checkSnapshotStatus();
}
return;
}
// FIXME: This could turn into a real virtual dispatch if we defined
// updateWidget(PluginCreationOption) on HTMLElement.
if (ownerElement->hasTagName(objectTag) || ownerElement->hasTagName(embedTag) || ownerElement->hasTagName(appletTag)) {
HTMLPlugInImageElement* pluginElement = toHTMLPlugInImageElement(ownerElement);
if (pluginElement->needsCheckForSizeChange()) {
pluginElement->checkSnapshotStatus();
return;
}
if (pluginElement->needsWidgetUpdate())
pluginElement->updateWidget(CreateAnyWidgetType);
}
// FIXME: It is not clear that Media elements need or want this updateWidget() call.
#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
else if (ownerElement->isMediaElement())
static_cast<HTMLMediaElement*>(ownerElement)->updateWidget(CreateAnyWidgetType);
#endif
else
ASSERT_NOT_REACHED();
// Caution: it's possible the object was destroyed again, since loading a
// plugin may run any arbitrary JavaScript.
embeddedObject->updateWidgetPosition();
}
}
bool FrameView::updateWidgets()
{
if (m_nestedLayoutCount > 1 || !m_widgetUpdateSet || m_widgetUpdateSet->isEmpty())
return true;
size_t size = m_widgetUpdateSet->size();
Vector<RenderObject*> objects;
objects.reserveInitialCapacity(size);
// Protect RendereArena from getting wiped out, when Document is detached during updateWidget().
RefPtr<RenderArena> protectedArena = m_frame->document()->renderArena();
RenderObjectSet::const_iterator end = m_widgetUpdateSet->end();
for (RenderObjectSet::const_iterator it = m_widgetUpdateSet->begin(); it != end; ++it) {
RenderObject* object = *it;
objects.uncheckedAppend(object);
if (object->isEmbeddedObject()) {
RenderEmbeddedObject* embeddedObject = static_cast<RenderEmbeddedObject*>(object);
embeddedObject->ref();
}
}
for (size_t i = 0; i < size; ++i) {
RenderObject* object = objects[i];
updateWidget(object);
m_widgetUpdateSet->remove(object);
}
for (size_t i = 0; i < size; ++i) {
RenderObject* object = objects[i];
if (object->isEmbeddedObject()) {
RenderEmbeddedObject* embeddedObject = static_cast<RenderEmbeddedObject*>(object);
embeddedObject->deref(protectedArena.get());
}
}
return m_widgetUpdateSet->isEmpty();
}
void FrameView::flushAnyPendingPostLayoutTasks()
{
if (!m_postLayoutTasksTimer.isActive())
return;
performPostLayoutTasks();
}
void FrameView::performPostLayoutTasks()
{
m_postLayoutTasksTimer.stop();
m_frame->selection()->setCaretRectNeedsUpdate();
m_frame->selection()->updateAppearance();
LayoutMilestones requestedMilestones = 0;
LayoutMilestones milestonesAchieved = 0;
Page* page = m_frame->page();
if (page)
requestedMilestones = page->requestedLayoutMilestones();
if (m_nestedLayoutCount <= 1) {
if (m_firstLayoutCallbackPending) {
m_firstLayoutCallbackPending = false;
m_frame->loader()->didFirstLayout();
if (requestedMilestones & DidFirstLayout)
milestonesAchieved |= DidFirstLayout;
if (page) {
if (page->mainFrame() == m_frame)
page->startCountingRelevantRepaintedObjects();
}
}
// 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;
if (requestedMilestones & DidFirstVisuallyNonEmptyLayout)
milestonesAchieved |= DidFirstVisuallyNonEmptyLayout;
}
}
m_frame->loader()->didLayout(milestonesAchieved);
#if ENABLE(FONT_LOAD_EVENTS)
if (RuntimeEnabledFeatures::fontLoadEventsEnabled())
m_frame->document()->fontloader()->didLayout();