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webkit / WebKit / df60608487942aeb54d7185e8d113fdf31e1f5f1 / . / Source / WebCore / page / FrameView.cpp
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/*
* 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_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_autoSizeFixedMinimumHeight(0)
, m_headerHeight(0)
, m_footerHeight(0)
, m_milestonesPendingPaint(0)
#if ENABLE(CSS_FILTERS)
, m_hasSoftwareFilters(false)
#endif
, m_visualUpdatesAllowedByClient(true)
, m_scrollPinningBehavior(DoNotPin)
{
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_needsFullRepaint = 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 = toHTMLFrameElementBase(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);
}
Page* page = frame() ? frame()->page() : 0;
if (page && page->chrome().client()->shouldPaintEntireContents())
setPaintsEntireContents(true);
}
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 && backgroundColor.alpha() > 0)
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* window = hostWindow())
window->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();
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* renderView = this->renderView()) {
if (renderView->usesCompositing())
renderView->compositor()->frameViewDidChangeSize();
}
#endif
if (!frameFlatteningEnabled())
sendResizeEventIfNeeded();
}
#if ENABLE(REQUEST_ANIMATION_FRAME)
bool FrameView::scheduleAnimation()
{
if (HostWindow* window = hostWindow()) {
window->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::frameFlatteningEnabled() const
{
Settings* settings = frame() ? frame()->settings() : 0;
if (!settings)
return false;
return settings->frameFlatteningEnabled();
}
bool FrameView::isFrameFlatteningValidForThisFrame() const
{
if (!frameFlatteningEnabled())
return false;
HTMLFrameOwnerElement* owner = frame() ? frame()->ownerElement() : 0;
if (!owner)
return false;
// Frame flattening is valid only for <frame> and <iframe>.
return owner->hasTagName(frameTag) || owner->hasTagName(iframeTag);
}
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.
return isFrameFlatteningValidForThisFrame();
}
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) && !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);
}
#endif // ENABLE(RUBBER_BANDING)
bool FrameView::scrollbarAnimationsAreSuppressed() const
{
Page* page = frame() ? frame()->page() : 0;
if (!page)
return true;
return page->shouldSuppressScrollbarAnimations();
}
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)
resumeAnimatingImages();
}
void FrameView::resumeAnimatingImages()
{
// 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;
}
// Viewport-dependent media queries may cause us to need completely different style information.
if (!document->styleResolverIfExists() || document->styleResolverIfExists()->affectedByViewportChange()) {
document->styleResolverChanged(DeferRecalcStyle);
// 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();
// 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) && !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_needsFullRepaint = !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_needsFullRepaint = 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_needsFullRepaint;
if (!subtree && !toRenderView(root)->printing())
adjustViewSize();
m_needsFullRepaint = neededFullRepaint;
// Now update the positions of all layers.
beginDeferredRepaints();
if (m_needsFullRepaint)
root->view()->repaintRootContents();
layer->updateLayerPositionsAfterLayout(renderView()->layer(), updateLayerPositionFlags(layer, subtree, m_needsFullRepaint));
endDeferredRepaints();
#if USE(ACCELERATED_COMPOSITING)
updateCompositingLayersAfterLayout();
#endif
m_layoutCount++;
#if PLATFORM(MAC) || PLATFORM(WIN)
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 = hasSlowRepaintObjects() || (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(RenderObject* o)
{
bool hadSlowRepaintObjects = hasSlowRepaintObjects();
if (!m_slowRepaintObjects)
m_slowRepaintObjects = adoptPtr(new RenderObjectSet);
m_slowRepaintObjects->add(o);
if (!hadSlowRepaintObjects) {
updateCanBlitOnScrollRecursively();
if (Page* page = m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
scrollingCoordinator->frameViewHasSlowRepaintObjectsDidChange(this);
}
}
}
void FrameView::removeSlowRepaintObject(RenderObject* o)
{
if (!m_slowRepaintObjects)
return;
m_slowRepaintObjects->remove(o);
if (m_slowRepaintObjects->isEmpty()) {
m_slowRepaintObjects = nullptr;
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());
}
IntPoint FrameView::minimumScrollPosition() const
{
IntPoint minimumPosition(ScrollView::minimumScrollPosition());
if (!m_frame || !m_frame->page())
return minimumPosition;
if (m_frame == m_frame->page()->mainFrame() && m_scrollPinningBehavior == PinToBottom)
minimumPosition.setY(maximumScrollPosition().y());
return minimumPosition;
}
IntPoint FrameView::maximumScrollPosition() const
{
IntPoint maximumOffset(contentsWidth() - visibleWidth() - scrollOrigin().x(), totalContentsSize().height() - visibleHeight() - scrollOrigin().y());
maximumOffset.clampNegativeToZero();
if (!m_frame || !m_frame->page())
return maximumOffset;
if (m_frame == m_frame->page()->mainFrame() && m_scrollPinningBehavior == PinToTop)
maximumOffset.setY(minimumScrollPosition().y());
return maximumOffset;
}
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);
}
repaintSlowRepaintObjects();
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);
}
void FrameView::repaintSlowRepaintObjects()
{
if (!m_slowRepaintObjects)
return;
// Renderers with fixed backgrounds may be in compositing layers, so we need to explicitly
// repaint them after scrolling.
RenderObjectSet::const_iterator end = m_slowRepaintObjects->end();
for (RenderObjectSet::const_iterator it = m_slowRepaintObjects->begin(); it != end; ++it) {
RenderObject* renderer = *it;
renderer->repaint();
}
}
// 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* anchorElement = m_frame->document()->findAnchor(name);
// Setting to null will clear the current target.
m_frame->document()->setCSSTarget(anchorElement);
#if ENABLE(SVG)
if (m_frame->document()->isSVGDocument()) {
if (SVGSVGElement* svg = toSVGDocument(m_frame->document())->rootElement()) {
svg->setupInitialView(name, anchorElement);
if (!anchorElement)
return true;
}
}
#endif
// Implement the rule that "" and "top" both mean top of page as in other browsers.
if (!anchorElement && !(name.isEmpty() || equalIgnoringCase(name, "top")))
return false;
maintainScrollPositionAtAnchor(anchorElement ? static_cast<Node*>(anchorElement) : m_frame->document());
// If the anchor accepts keyboard focus, move focus there to aid users relying on keyboard navigation.
if (anchorElement && anchorElement->isFocusable())
m_frame->document()->setFocusedElement(anchorElement);
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;
ScrollView::setScrollPosition(scrollPoint);
}
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();
repaintSlowRepaintObjects();
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
}
// FIXME: this function is misnamed; its primary purpose is to update RenderLayer positions.
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 <= 1 && 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->isPluginUnavailable())
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())
toHTMLMediaElement(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 && m_frame->document()->documentElement()) {
if (m_firstLayoutCallbackPending) {
m_firstLayoutCallbackPending = false;
m_frame->loader()->didFirstLayout();
if (requestedMilestones & DidFirstLayout)
milestonesAchieved |= DidFirstLayout;
if (page) {
if (page->mainFrame() == m_frame)
page->startCountingRelevantRepaintedObjects();
}
}
updateIsVisuallyNonEmpty();
// 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;
}
}
if (milestonesAchieved)
m_frame->loader()->didLayout(milestonesAchieved);
#if ENABLE(FONT_LOAD_EVENTS)
if (RuntimeEnabledFeatures::fontLoadEventsEnabled())
m_frame->document()->fontloader()->didLayout();
#endif
// FIXME: We should consider adding DidLayout as a LayoutMilestone. That would let us merge this
// with didLayout(LayoutMilestones).
m_frame->loader()->client()->dispatchDidLayout();
if (RenderView* renderView = this->renderView())
renderView->updateWidgetPositions();
// layout() protects FrameView, but it still can get destroyed when updateWidgets()
// is called through the post layout timer.
RefPtr<FrameView> protector(this);
for (unsigned i = 0; i < maxUpdateWidgetsIterations; i++) {
if (updateWidgets())
break;
}
if (page) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
scrollingCoordinator->frameViewLayoutUpdated(this);
}
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* renderView = this->renderView()) {
if (renderView->usesCompositing())
renderView->compositor()->frameViewDidLayout();
}
#endif
scrollToAnchor();
m_actionScheduler->resume();
sendResizeEventIfNeeded();
}
void FrameView::sendResizeEventIfNeeded()
{
ASSERT(m_frame);
RenderView* renderView = this->renderView();
if (!renderView || renderView->printing())
return;
Page* page = m_frame->page();
IntSize currentSize;
if (useFixedLayout() && !fixedLayoutSize().isEmpty() && delegatesScrolling())
currentSize = fixedLayoutSize();
else
currentSize = visibleContentRect(IncludeScrollbars).size();
float currentZoomFactor = renderView->style()->zoom();
bool shouldSendResizeEvent = !m_firstLayout && (currentSize != m_lastViewportSize || currentZoomFactor != m_lastZoomFactor);
m_lastViewportSize = currentSize;
m_lastZoomFactor = currentZoomFactor;
if (!shouldSendResizeEvent)
return;
bool isMainFrame = page && page->mainFrame() == m_frame;
bool canSendResizeEventSynchronously = isMainFrame && !isInLayout();
// If we resized during layout, queue up a resize event for later, otherwise fire it right away.
RefPtr<Event> resizeEvent = Event::create(eventNames().resizeEvent, false, false);
if (canSendResizeEventSynchronously)
m_frame->document()->dispatchWindowEvent(resizeEvent.release(), m_frame->document()->domWindow());
else
m_frame->document()->enqueueWindowEvent(resizeEvent.release());
#if ENABLE(INSPECTOR)
if (InspectorInstrumentation::hasFrontends() && isMainFrame) {
if (InspectorClient* inspectorClient = page ? page->inspectorController()->inspectorClient() : 0)
inspectorClient->didResizeMainFrame(m_frame.get());
}
#endif
}
void FrameView::willStartLiveResize()
{
ScrollView::willStartLiveResize();
adjustTiledBackingCoverage();
}
void FrameView::willEndLiveResize()
{
ScrollView::willEndLiveResize();
adjustTiledBackingCoverage();
}
void FrameView::postLayoutTimerFired(Timer<FrameView>*)
{
performPostLayoutTasks();
}
void FrameView::autoSizeIfEnabled()
{
if (!m_shouldAutoSize)
return;
if (m_inAutoSize)
return;
TemporaryChange<bool> changeInAutoSize(m_inAutoSize, true);
Document* document = frame()->document();
if (!document)
return;
RenderView* documentView = document->renderView();
Element* documentElement = document->documentElement();
if (!documentView || !documentElement)
return;
// Start from the minimum size and allow it to grow.
resize(m_minAutoSize.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();
int width = documentView->minPreferredLogicalWidth();
int height = documentView->documentRect().height();
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()
&& !frame()->loader()->isComplete() && (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_autoSizeContentSize = contentsSize();
if (m_autoSizeFixedMinimumHeight) {
resize(m_autoSizeContentSize.width(), max(m_autoSizeFixedMinimumHeight, m_autoSizeContentSize.height()));
document->updateLayoutIgnorePendingStylesheets();
}
m_didRunAutosize = true;
}
void FrameView::setAutoSizeFixedMinimumHeight(int fixedMinimumHeight)
{
if (m_autoSizeFixedMinimumHeight == fixedMinimumHeight)
return;
m_autoSizeFixedMinimumHeight = fixedMinimumHeight;
setNeedsLayout();
}
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;
m_actionScheduler->scheduleEvent(OverflowEvent::create(horizontalOverflowChanged, horizontalOverflow,
verticalOverflowChanged, verticalOverflow),
m_viewportRenderer->node());
}
}
const Pagination& FrameView::pagination() const
{
if (m_pagination != Pagination())
return m_pagination;
if (Page* page = m_frame->page()) {
if (page->mainFrame() == m_frame)
return page->pagination();
}
return m_pagination;
}
void FrameView::setPagination(const Pagination& pagination)
{
if (m_pagination == pagination)
return;
m_pagination = pagination;
if (m_frame)
m_frame->document()->styleResolverChanged(DeferRecalcStyle);
}
IntRect FrameView::windowClipRect(bool clipToContents) const
{
ASSERT(m_frame->view() == this);
if (paintsEntireContents())
return IntRect(IntPoint(), totalContentsSize());
// Set our clip rect to be our contents.
IntRect clipRect = contentsToWindow(visibleContentRect(clipToContents ? ExcludeScrollbars : IncludeScrollbars));
if (!m_frame || !m_frame->ownerElement())
return clipRect;
// Take our owner element and get its clip rect.
HTMLFrameOwnerElement* ownerElement = m_frame->ownerElement();
FrameView* parentView = ownerElement->document()->view();
if (parentView)
clipRect.intersect(parentView->windowClipRectForFrameOwner(ownerElement, true));
return clipRect;
}
IntRect FrameView::windowClipRectForFrameOwner(const HTMLFrameOwnerElement* ownerElement, bool clipToLayerContents) 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();
// Apply the clip from the layer.
IntRect clipRect;
if (clipToLayerContents)
clipRect = pixelSnappedIntRect(enclosingLayer->childrenClipRect());
else
clipRect = pixelSnappedIntRect(enclosingLayer->selfClipRect());
clipRect = contentsToWindow(clipRect);
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())
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());
invalidateRect(dirtyRect);
}
void FrameView::getTickmarks(Vector<IntRect>& tickmarks) const
{
tickmarks = frame()->document()->markers()->renderedRectsForMarkers(DocumentMarker::TextMatch);
}
IntRect FrameView::windowResizerRect() const
{
Page* page = frame() ? frame()->page() : 0;
if (!page)
return IntRect();
return page->chrome().windowResizerRect();
}
float FrameView::visibleContentScaleFactor() const
{
if (!m_frame || !m_frame->page())
return 1;
if (!m_frame->settings()->applyPageScaleFactorInCompositor() || m_frame != m_frame->page()->mainFrame())
return 1;
return m_frame->page()->pageScaleFactor();
}
void FrameView::setVisibleScrollerThumbRect(const IntRect& scrollerThumb)
{
Page* page = m_frame->page();
if (!page)
return;
if (page->mainFrame() != m_frame)
return;
page->chrome().client()->notifyScrollerThumbIsVisibleInRect(scrollerThumb);
}
bool FrameView::scrollbarsCanBeActive() const
{
if (!m_frame)
return false;
if (m_frame->view() != this)
return false;
if (Page* page = m_frame->page()) {
if (page->shouldSuppressScrollbarAnimations())
return false;
}
if (Document* document = m_frame->document())
return !document->inPageCache();
return false;
}
ScrollableArea* FrameView::enclosingScrollableArea() const
{
// FIXME: Walk up the frame tree and look for a scrollable parent frame or RenderLayer.
return 0;
}
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 totalContentsSize = this->totalContentsSize();
IntSize visibleContentSize = visibleContentRect().size();
if ((totalContentsSize.height() <= visibleContentSize.height() && totalContentsSize.width() <= visibleContentSize.width()))
return false;
// Covers #2.
HTMLFrameOwnerElement* owner = m_frame->ownerElement();
if (owner && (!owner->renderer() || !owner->renderer()->visibleToHitTesting()))
return false;
// Cover #3 and #4.
ScrollbarMode horizontalMode;
ScrollbarMode verticalMode;
calculateScrollbarModesForLayout(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(int newStyle, bool forceUpdate)
{
Page* page = m_frame->page();
if (!page)
return;
if (page->mainFrame() != m_frame)
return;
page->chrome().client()->recommendedScrollbarStyleDidChange(newStyle);
if (forceUpdate)
ScrollView::scrollbarStyleChanged(newStyle, forceUpdate);
}
void FrameView::setAnimatorsAreActive()
{
Page* page = m_frame->page();
if (!page)
return;
if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
scrollAnimator->setIsActive();
if (!m_scrollableAreas)
return;
for (HashSet<ScrollableArea*>::const_iterator it = m_scrollableAreas->begin(), end = m_scrollableAreas->end(); it != end; ++it) {
ScrollableArea* scrollableArea = *it;
ASSERT(scrollableArea->scrollbarsCanBeActive());
scrollableArea->scrollAnimator()->setIsActive();
}
}
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
{
#if ENABLE(SMOOTH_SCROLLING)
if (Page* page = m_frame->page())
return page->settings()->scrollAnimatorEnabled();
#endif
return false;
}
#if ENABLE(DASHBOARD_SUPPORT) || ENABLE(DRAGGABLE_REGION)
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);
Page* page = m_frame->page();
if (!page)
return;
page->chrome().client()->annotatedRegionsChanged();
}
#endif
void FrameView::updateScrollCorner()
{
RenderObject* renderer = 0;
RefPtr<RenderStyle> cornerStyle;
IntRect cornerRect = scrollCornerRect();
if (!cornerRect.isEmpty()) {
// Try the <body> element first as a scroll corner source.
Document* doc = m_frame->document();
Element* body = doc ? doc->body() : 0;
if (body && body->renderer()) {
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.
Element* docElement = doc ? doc->documentElement() : 0;
if (docElement && docElement->renderer()) {
renderer = docElement->renderer();
cornerStyle = renderer->getUncachedPseudoStyle(PseudoStyleRequest(SCROLLBAR_CORNER), renderer->style());
}
}
if (!cornerStyle) {
// If we have an owning iframe/frame 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(renderer->document());
m_scrollCorner->setStyle(cornerStyle.release());
invalidateScrollCorner(cornerRect);
} else if (m_scrollCorner) {
m_scrollCorner->destroy();
m_scrollCorner = 0;
}
ScrollView::updateScrollCorner();
}
void FrameView::paintScrollCorner(GraphicsContext* context, const IntRect& cornerRect)
{
if (context->updatingControlTints()) {
updateScrollCorner();
return;
}
if (m_scrollCorner) {
bool needsBackgorund = m_frame->page() && m_frame->page()->mainFrame() == m_frame;
if (needsBackgorund)
context->fillRect(cornerRect, baseBackgroundColor(), ColorSpaceDeviceRGB);
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->page() && m_frame->page()->mainFrame() == m_frame);
if (needsBackgorund) {
IntRect toFill = bar->frameRect();
toFill.intersect(rect);
context->fillRect(toFill, baseBackgroundColor(), ColorSpaceDeviceRGB);
}
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.
// Return invalid Color objects whenever there is insufficient information.
if (!frame()->document())
return Color();
Element* htmlElement = frame()->document()->documentElement();
Element* bodyElement = frame()->document()->body();
// Start with invalid colors.
Color htmlBackgroundColor;
Color bodyBackgroundColor;
if (htmlElement && htmlElement->renderer())
htmlBackgroundColor = htmlElement->renderer()->style()->visitedDependentColor(CSSPropertyBackgroundColor);
if (bodyElement && bodyElement->renderer())
bodyBackgroundColor = bodyElement->renderer()->style()->visitedDependentColor(CSSPropertyBackgroundColor);
if (!bodyBackgroundColor.isValid()) {
if (!htmlBackgroundColor.isValid())
return Color();
return baseBackgroundColor().blend(htmlBackgroundColor);
}
if (!htmlBackgroundColor.isValid())
return baseBackgroundColor().blend(bodyBackgroundColor);
// 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.
return baseBackgroundColor().blend(htmlBackgroundColor).blend(bodyBackgroundColor);
}
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;
if (Frame* parentFrame = m_frame->tree()->parent())
return parentFrame->view();
return 0;
}
bool FrameView::isInChildFrameWithFrameFlattening() const
{
if (!parent() || !m_frame->ownerElement())
return false;
// Frame flattening applies when the owner element is either in a frameset or
// an iframe with flattening parameters.
if (m_frame->ownerElement()->hasTagName(iframeTag)) {
RenderIFrame* iframeRenderer = toRenderIFrame(m_frame->ownerElement()->renderPart());
if (iframeRenderer->flattenFrame() || iframeRenderer->isSeamless())
return true;
}
if (!frameFlatteningEnabled())
return false;
if (m_frame->ownerElement()->hasTagName(frameTag))
return true;
return false;
}
bool FrameView::doLayoutWithFrameFlattening(bool allowSubtree)
{
// Try initiating layout from the topmost parent.
FrameView* parentView = parentFrameView();
if (!parentView)
return false;
// In the middle of parent layout, no need to restart from topmost.
if (parentView->m_nestedLayoutCount)
return false;
// Parent tree is clean. Starting layout from it would have no effect.
if (!parentView->needsLayout())
return false;
while (parentView->parentFrameView())
parentView = parentView->parentFrameView();
parentView->layout(allowSubtree);
RenderObject* root = m_layoutRoot ? m_layoutRoot : m_frame->document()->renderer();
ASSERT_UNUSED(root, !root->needsLayout());
return true;
}
void FrameView::updateControlTints()
{
// This is called when control tints are changed from aqua/graphite to clear and vice versa.
// We do a "fake" paint, and when the theme gets a paint call, it can then do an invalidate.
// This is only done if the theme supports control tinting. It's up to the theme and platform
// to define when controls get the tint and to call this function when that changes.
// Optimize the common case where we bring a window to the front while it's still empty.
if (!m_frame || m_frame->document()->url().isEmpty())
return;
RenderView* renderView = this->renderView();
if ((renderView && renderView->theme()->supportsControlTints()) || hasCustomScrollbars())
paintControlTints();
}
void FrameView::paintControlTints()
{
if (needsLayout())
layout();
PlatformGraphicsContext* const noContext = 0;
GraphicsContext context(noContext);
context.setUpdatingControlTints(true);
if (platformWidget())
paintContents(&context, visibleContentRect());
else
paint(&context, frameRect());
}
bool FrameView::wasScrolledByUser() const
{
return m_wasScrolledByUser;
}
void FrameView::setWasScrolledByUser(bool wasScrolledByUser)
{
if (m_inProgrammaticScroll)
return;
m_maintainScrollPositionAnchor = 0;
if (m_wasScrolledByUser == wasScrolledByUser)
return;
m_wasScrolledByUser = wasScrolledByUser;
adjustTiledBackingCoverage();
}
void FrameView::paintContents(GraphicsContext* p, const IntRect& rect)
{
if (!frame())
return;
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->ownerElement())
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), ColorSpaceDeviceRGB);
#endif
RenderView* renderView = this->renderView();
if (!renderView) {
LOG_ERROR("called FrameView::paint with nil renderer");
return;
}
ASSERT(!needsLayout());
if (needsLayout())
return;
if (!p->paintingDisabled())
InspectorInstrumentation::willPaint(renderView);
bool isTopLevelPainter = !sCurrentPaintTimeStamp;
if (isTopLevelPainter)
sCurrentPaintTimeStamp = currentTime();
FontCachePurgePreventer fontCachePurgePreventer;
#if USE(ACCELERATED_COMPOSITING)
if (!p->paintingDisabled() && !document->printing())
flushCompositingStateForThisFrame(m_frame.get());
#endif
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;
bool flatteningPaint = m_paintBehavior & PaintBehaviorFlattenCompositingLayers;
bool isRootFrame = !m_frame->ownerElement();
if (flatteningPaint && isRootFrame)
notifyWidgetsInAllFrames(WillPaintFlattened);
ASSERT(!m_isPainting);
m_isPainting = true;
// m_nodeToDraw is used to draw only one element (and its descendants)
RenderObject* eltRenderer = m_nodeToDraw ? m_nodeToDraw->renderer() : 0;
RenderLayer* rootLayer = renderView->layer();
#ifndef NDEBUG
RenderObject::SetLayoutNeededForbiddenScope forbidSetNeedsLayout(rootLayer->renderer());
#endif
rootLayer->paint(p, rect, m_paintBehavior, eltRenderer);
if (rootLayer->containsDirtyOverlayScrollbars())
rootLayer->paintOverlayScrollbars(p, rect, m_paintBehavior, eltRenderer);
m_isPainting = false;
if (flatteningPaint && isRootFrame)
notifyWidgetsInAllFrames(DidPaintFlattened);
m_paintBehavior = oldPaintBehavior;
m_lastPaintTime = currentTime();
// Regions may have changed as a result of the visibility/z-index of element changing.
#if ENABLE(DASHBOARD_SUPPORT) || ENABLE(DRAGGABLE_REGION)
if (document->annotatedRegionsDirty())
updateAnnotatedRegions();
#endif
if (isTopLevelPainter)
sCurrentPaintTimeStamp = 0;
if (!p->paintingDisabled()) {
InspectorInstrumentation::didPaint(renderView, p, rect);
// FIXME: should probably not fire milestones for snapshot painting. https://bugs.webkit.org/show_bug.cgi?id=117623
firePaintRelatedMilestones();
}
}
void FrameView::setPaintBehavior(PaintBehavior behavior)
{
m_paintBehavior = behavior;
}
PaintBehavior FrameView::paintBehavior() const
{
return m_paintBehavior;
}
bool FrameView::isPainting() const
{
return m_isPainting;
}
// FIXME: change this to use the subtreePaint terminology.
void FrameView::setNodeToDraw(Node* node)
{
m_nodeToDraw = node;
}
void FrameView::paintContentsForSnapshot(GraphicsContext* context, const IntRect& imageRect, SelectionInSnapshot shouldPaintSelection, CoordinateSpaceForSnapshot coordinateSpace)
{
updateLayoutAndStyleIfNeededRecursive();
// Cache paint behavior and set a new behavior appropriate for snapshots.
PaintBehavior oldBehavior = paintBehavior();
setPaintBehavior(oldBehavior | PaintBehaviorFlattenCompositingLayers);
// If the snapshot should exclude selection, then we'll clear the current selection
// in the render tree only. This will allow us to restore the selection from the DOM
// after we paint the snapshot.
if (shouldPaintSelection == ExcludeSelection) {
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext(m_frame.get())) {
if (RenderView* root = frame->contentRenderer())
root->clearSelection();
}
}
if (coordinateSpace == DocumentCoordinates)
paintContents(context, imageRect);
else {
// A snapshot in ViewCoordinates will include a scrollbar, and the snapshot will contain
// whatever content the document is currently scrolled to.
paint(context, imageRect);
}
// Restore selection.
if (shouldPaintSelection == ExcludeSelection) {
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext(m_frame.get()))
frame->selection()->updateAppearance();
}
// Restore cached paint behavior.
setPaintBehavior(oldBehavior);
}
void FrameView::paintOverhangAreas(GraphicsContext* context, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect)
{
if (context->paintingDisabled())
return;
if (m_frame->document()->printing())
return;
Page* page = m_frame->page();
if (page->mainFrame() == m_frame) {
if (page->chrome().client()->paintCustomOverhangArea(context, horizontalOverhangArea, verticalOverhangArea, dirtyRect))
return;
}
ScrollView::paintOverhangAreas(context, horizontalOverhangArea, verticalOverhangArea, dirtyRect);
}
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()->updateStyleIfNeeded();
if (needsLayout())
layout();
// Grab a copy of the children() set, as it may be mutated by the following updateLayoutAndStyleIfNeededRecursive
// calls, as they can potentially re-enter a layout of the parent frame view, which may add/remove scrollbars
// and thus mutates the children() set.
Vector<RefPtr<FrameView> > frameViews;
collectFrameViewChildren(this, frameViews);
const Vector<RefPtr<FrameView> >::iterator end = frameViews.end();
for (Vector<RefPtr<FrameView> >::iterator it = frameViews.begin(); it != end; ++it)
(*it)->updateLayoutAndStyleIfNeededRecursive();
// updateLayoutAndStyleIfNeededRecursive is called when we need to make sure style and layout are up-to-date before
// painting, so we need to flush out any deferred repaints too.
flushDeferredRepaints();
// When frame flattening is on, child frame can mark parent frame dirty. In such case, child frame
// needs to call layout on parent frame recursively.
// This assert ensures that parent frames are clean, when child frames finished updating layout and style.
ASSERT(!needsLayout());
}
bool FrameView::qualifiesAsVisuallyNonEmpty() const
{
// No content yet.
Element* documentElement = m_frame->document()->documentElement();
if (!documentElement || !documentElement->renderer())
return false;
// Ensure that we always get marked visually non-empty eventually.
if (!m_frame->document()->parsing() && m_frame->loader()->stateMachine()->committedFirstRealDocumentLoad())
return true;
// Require the document to grow a bit.
static const int documentHeightThreshold = 200;
if (documentElement->renderBox()->layoutOverflowRect().pixelSnappedHeight() < documentHeightThreshold)
return false;
// The first few hundred characters rarely contain the interesting content of the page.
if (m_visuallyNonEmptyCharacterCount > visualCharacterThreshold)
return true;
// Use a threshold value to prevent very small amounts of visible content from triggering didFirstVisuallyNonEmptyLayout
if (m_visuallyNonEmptyPixelCount > visualPixelThreshold)
return true;
return false;
}
void FrameView::updateIsVisuallyNonEmpty()
{
if (m_isVisuallyNonEmpty)
return;
if (!qualifiesAsVisuallyNonEmpty())
return;
m_isVisuallyNonEmpty = true;
adjustTiledBackingCoverage();
}
void FrameView::enableAutoSizeMode(bool enable, const IntSize& minSize, const IntSize& maxSize)
{
ASSERT(!enable || !minSize.isEmpty());
ASSERT(minSize.width() <= maxSize.width());
ASSERT(minSize.height() <= maxSize.height());
if (m_shouldAutoSize == enable && m_minAutoSize == minSize && m_maxAutoSize == maxSize)
return;
m_shouldAutoSize = enable;
m_minAutoSize = minSize;
m_maxAutoSize = maxSize;
m_didRunAutosize = false;
setNeedsLayout();
scheduleRelayout();
if (m_shouldAutoSize)
return;
// Since autosize mode forces the scrollbar mode, change them to being auto.
setVerticalScrollbarLock(false);
setHorizontalScrollbarLock(false);
setScrollbarModes(ScrollbarAuto, ScrollbarAuto);
}
void FrameView::forceLayout(bool allowSubtree)
{
layout(allowSubtree);
}
void FrameView::forceLayoutForPagination(const FloatSize& pageSize, const FloatSize& originalPageSize, float maximumShrinkFactor, AdjustViewSizeOrNot shouldAdjustViewSize)
{
// Dumping externalRepresentation(m_frame->renderer()).ascii() is a good trick to see
// the state of things before and after the layout
if (RenderView* renderView = this->renderView()) {
float pageLogicalWidth = renderView->style()->isHorizontalWritingMode() ? pageSize.width() : pageSize.height();
float pageLogicalHeight = renderView->style()->isHorizontalWritingMode() ? pageSize.height() : pageSize.width();
LayoutUnit flooredPageLogicalWidth = static_cast<LayoutUnit>(pageLogicalWidth);
LayoutUnit flooredPageLogicalHeight = static_cast<LayoutUnit>(pageLogicalHeight);
renderView->setLogicalWidth(flooredPageLogicalWidth);
renderView->setPageLogicalHeight(flooredPageLogicalHeight);
renderView->setNeedsLayoutAndPrefWidthsRecalc();
forceLayout();
// If we don't fit in the given page width, we'll lay out again. If we don't fit in the
// page width when shrunk, we will lay out at maximum shrink and clip extra content.
// FIXME: We are assuming a shrink-to-fit printing implementation. A cropping
// implementation should not do this!
bool horizontalWritingMode = renderView->style()->isHorizontalWritingMode();
const LayoutRect& documentRect = renderView->documentRect();
LayoutUnit docLogicalWidth = horizontalWritingMode ? documentRect.width() : documentRect.height();
if (docLogicalWidth > pageLogicalWidth) {
int expectedPageWidth = std::min<float>(documentRect.width(), pageSize.width() * maximumShrinkFactor);
int expectedPageHeight = std::min<float>(documentRect.height(), pageSize.height() * maximumShrinkFactor);
FloatSize maxPageSize = m_frame->resizePageRectsKeepingRatio(FloatSize(originalPageSize.width(), originalPageSize.height()), FloatSize(expectedPageWidth, expectedPageHeight));
pageLogicalWidth = horizontalWritingMode ? maxPageSize.width() : maxPageSize.height();
pageLogicalHeight = horizontalWritingMode ? maxPageSize.height() : maxPageSize.width();
flooredPageLogicalWidth = static_cast<LayoutUnit>(pageLogicalWidth);
flooredPageLogicalHeight = static_cast<LayoutUnit>(pageLogicalHeight);
renderView->setLogicalWidth(flooredPageLogicalWidth);
renderView->setPageLogicalHeight(flooredPageLogicalHeight);
renderView->setNeedsLayoutAndPrefWidthsRecalc();
forceLayout();
const LayoutRect& updatedDocumentRect = renderView->documentRect();
LayoutUnit docLogicalHeight = horizontalWritingMode ? updatedDocumentRect.height() : updatedDocumentRect.width();
LayoutUnit docLogicalTop = horizontalWritingMode ? updatedDocumentRect.y() : updatedDocumentRect.x();
LayoutUnit docLogicalRight = horizontalWritingMode ? updatedDocumentRect.maxX() : updatedDocumentRect.maxY();
LayoutUnit clippedLogicalLeft = 0;
if (!renderView->style()->isLeftToRightDirection())
clippedLogicalLeft = docLogicalRight - pageLogicalWidth;
LayoutRect overflow(clippedLogicalLeft, docLogicalTop, pageLogicalWidth, docLogicalHeight);
if (!horizontalWritingMode)
overflow = overflow.transposedRect();
renderView->clearLayoutOverflow();
renderView->addLayoutOverflow(overflow); // This is how we clip in case we overflow again.
}
}
if (shouldAdjustViewSize)
adjustViewSize();
}
void FrameView::adjustPageHeightDeprecated(float *newBottom, float oldTop, float oldBottom, float /*bottomLimit*/)
{
RenderView* renderView = this->renderView();
if (!renderView) {
*newBottom = oldBottom;
return;
}
// Use a context with painting disabled.
GraphicsContext context((PlatformGraphicsContext*)0);
renderView->setTruncatedAt(static_cast<int>(floorf(oldBottom)));
IntRect dirtyRect(0, static_cast<int>(floorf(oldTop)), renderView->layoutOverflowRect().maxX(), static_cast<int>(ceilf(oldBottom - oldTop)));
renderView->setPrintRect(dirtyRect);
renderView->layer()->paint(&context, dirtyRect);
*newBottom = renderView->bestTruncatedAt();
if (!*newBottom)
*newBottom = oldBottom;
renderView->setPrintRect(IntRect());
}
IntRect FrameView::convertFromRenderer(const RenderObject* renderer, const IntRect& rendererRect) const
{
IntRect rect = pixelSnappedIntRect(enclosingLayoutRect(renderer->localToAbsoluteQuad(FloatRect(rendererRect)).boundingBox()));
// Convert from page ("absolute") to FrameView coordinates.
if (!delegatesScrolling())
rect.moveBy(-scrollPosition() + IntPoint(0, headerHeight()));
return rect;
}
IntRect FrameView::convertToRenderer(const RenderObject* renderer, const IntRect& viewRect) const
{
IntRect rect = viewRect;
// Convert from FrameView coords into page ("absolute") coordinates.
if (!delegatesScrolling())
rect.moveBy(scrollPositionRelativeToDocument());
// FIXME: we don't have a way to map an absolute rect down to a local quad, so just
// move the rect for now.
rect.setLocation(roundedIntPoint(renderer->absoluteToLocal(rect.location(), UseTransforms)));
return rect;
}
IntPoint FrameView::convertFromRenderer(const RenderObject* renderer, const IntPoint& rendererPoint) const
{
IntPoint point = roundedIntPoint(renderer->localToAbsolute(rendererPoint, UseTransforms));
// Convert from page ("absolute") to FrameView coordinates.
if (!delegatesScrolling())
point.moveBy(-scrollPosition() + IntPoint(0, headerHeight()));
return point;
}
IntPoint FrameView::convertToRenderer(const RenderObject* renderer, const IntPoint& viewPoint) const
{
IntPoint point = viewPoint;
// Convert from FrameView coords into page ("absolute") coordinates.
if (!delegatesScrolling())
point = point + scrollPositionRelativeToDocument();
return roundedIntPoint(renderer->absoluteToLocal(point, UseTransforms));
}
IntRect FrameView::convertToContainingView(const IntRect& localRect) const
{
if (const ScrollView* parentScrollView = parent()) {
if (parentScrollView->isFrameView()) {
const FrameView* parentView = toFrameView(parentScrollView);
// Get our renderer in the parent view
RenderPart* renderer = m_frame->ownerRenderer();
if (!renderer)
return localRect;
IntRect rect(localRect);
// Add borders and padding??
rect.move(renderer->borderLeft() + renderer->paddingLeft(),
renderer->borderTop() + renderer->paddingTop());
return parentView->convertFromRenderer(renderer, rect);
}
return Widget::convertToContainingView(localRect);
}
return localRect;
}
IntRect FrameView::convertFromContainingView(const IntRect& parentRect) const
{
if (const ScrollView* parentScrollView = parent()) {
if (parentScrollView->isFrameView()) {
const FrameView* parentView = toFrameView(parentScrollView);
// Get our renderer in the parent view
RenderPart* renderer = m_frame->ownerRenderer();
if (!renderer)
return parentRect;
IntRect rect = parentView->convertToRenderer(renderer, parentRect);
// Subtract borders and padding
rect.move(-renderer->borderLeft() - renderer->paddingLeft(),
-renderer->borderTop() - renderer->paddingTop());
return rect;
}
return Widget::convertFromContainingView(parentRect);
}
return parentRect;
}
IntPoint FrameView::convertToContainingView(const IntPoint& localPoint) const
{
if (const ScrollView* parentScrollView = parent()) {
if (parentScrollView->isFrameView()) {
const FrameView* parentView = toFrameView(parentScrollView);
// Get our renderer in the parent view
RenderPart* renderer = m_frame->ownerRenderer();
if (!renderer)
return localPoint;
IntPoint point(localPoint);
// Add borders and padding
point.move(renderer->borderLeft() + renderer->paddingLeft(),
renderer->borderTop() + renderer->paddingTop());
return parentView->convertFromRenderer(renderer, point);
}
return Widget::convertToContainingView(localPoint);
}
return localPoint;
}
IntPoint FrameView::convertFromContainingView(const IntPoint& parentPoint) const
{
if (const ScrollView* parentScrollView = parent()) {
if (parentScrollView->isFrameView()) {
const FrameView* parentView = toFrameView(parentScrollView);
// Get our renderer in the parent view
RenderPart* renderer = m_frame->ownerRenderer();
if (!renderer)
return parentPoint;
IntPoint point = parentView->convertToRenderer(renderer, parentPoint);
// Subtract borders and padding
point.move(-renderer->borderLeft() - renderer->paddingLeft(),
-renderer->borderTop() - renderer->paddingTop());
return point;
}
return Widget::convertFromContainingView(parentPoint);
}
return parentPoint;
}
// Normal delay
void FrameView::setRepaintThrottlingDeferredRepaintDelay(double p)
{
s_normalDeferredRepaintDelay = p;
}
// Negative value would mean that first few repaints happen without a delay
void FrameView::setRepaintThrottlingnInitialDeferredRepaintDelayDuringLoading(double p)
{
s_initialDeferredRepaintDelayDuringLoading = p;
}
// The delay grows on each repaint to this maximum value
void FrameView::setRepaintThrottlingMaxDeferredRepaintDelayDuringLoading(double p)
{
s_maxDeferredRepaintDelayDuringLoading = p;
}
// On each repaint the delay increases by this amount
void FrameView::setRepaintThrottlingDeferredRepaintDelayIncrementDuringLoading(double p)
{
s_deferredRepaintDelayIncrementDuringLoading = p;
}
void FrameView::setTracksRepaints(bool trackRepaints)
{
if (trackRepaints == m_isTrackingRepaints)
return;
// Force layout to flush out any pending repaints.
if (trackRepaints) {
if (frame() && frame()->document())
frame()->document()->updateLayout();
}
#if USE(ACCELERATED_COMPOSITING)
for (Frame* frame = m_frame->tree()->top(); frame; frame = frame->tree()->traverseNext()) {
if (RenderView* renderView = frame->contentRenderer())
renderView->compositor()->setTracksRepaints(trackRepaints);
}
#endif
resetTrackedRepaints();
m_isTrackingRepaints = trackRepaints;
}
void FrameView::resetTrackedRepaints()
{
m_trackedRepaintRects.clear();
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* renderView = this->renderView())
renderView->compositor()->resetTrackedRepaintRects();
#endif
}
String FrameView::trackedRepaintRectsAsText() const
{
if (frame() && frame()->document())
frame()->document()->updateLayout();
TextStream ts;
if (!m_trackedRepaintRects.isEmpty()) {
ts << "(repaint rects\n";
for (size_t i = 0; i < m_trackedRepaintRects.size(); ++i)
ts << " (rect " << m_trackedRepaintRects[i].x() << " " << m_trackedRepaintRects[i].y() << " " << m_trackedRepaintRects[i].width() << " " << m_trackedRepaintRects[i].height() << ")\n";
ts << ")\n";
}
return ts.release();
}
bool FrameView::addScrollableArea(ScrollableArea* scrollableArea)
{
if (!m_scrollableAreas)
m_scrollableAreas = adoptPtr(new ScrollableAreaSet);
return m_scrollableAreas->add(scrollableArea).isNewEntry;
}
bool FrameView::removeScrollableArea(ScrollableArea* scrollableArea)
{
if (!m_scrollableAreas)
return false;
ScrollableAreaSet::iterator it = m_scrollableAreas->find(scrollableArea);
if (it == m_scrollableAreas->end())
return false;
m_scrollableAreas->remove(it);
return true;
}
bool FrameView::containsScrollableArea(ScrollableArea* scrollableArea) const
{
if (!m_scrollableAreas)
return false;
return m_scrollableAreas->contains(scrollableArea);
}
void FrameView::removeChild(Widget* widget)
{
if (widget->isFrameView())
removeScrollableArea(toFrameView(widget));
ScrollView::removeChild(widget);
}
bool FrameView::wheelEvent(const PlatformWheelEvent& wheelEvent)
{
// Note that to allow for rubber-band over-scroll behavior, even non-scrollable views
// should handle wheel events.
#if !ENABLE(RUBBER_BANDING)
if (!isScrollable())
return false;
#endif
if (delegatesScrolling()) {
IntSize offset = scrollOffset();
IntSize newOffset = IntSize(offset.width() - wheelEvent.deltaX(), offset.height() - wheelEvent.deltaY());
if (offset != newOffset) {
ScrollView::scrollTo(newOffset);
scrollPositionChanged();
frame()->loader()->client()->didChangeScrollOffset();
}
return true;
}
// We don't allow mouse wheeling to happen in a ScrollView that has had its scrollbars explicitly disabled.
if (!canHaveScrollbars())
return false;
if (platformWidget())
return false;
#if ENABLE(THREADED_SCROLLING)
if (Page* page = m_frame->page()) {
if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator()) {
if (scrollingCoordinator->coordinatesScrollingForFrameView(this))
return scrollingCoordinator->handleWheelEvent(this, wheelEvent);
}
}
#endif
return ScrollableArea::handleWheelEvent(wheelEvent);
}
bool FrameView::isVerticalDocument() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return true;
return renderView->style()->isHorizontalWritingMode();
}
bool FrameView::isFlippedDocument() const
{
RenderView* renderView = this->renderView();
if (!renderView)
return false;
return renderView->style()->isFlippedBlocksWritingMode();
}
void FrameView::notifyWidgetsInAllFrames(WidgetNotification notification)
{
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext(m_frame.get())) {
if (RenderView* root = frame->contentRenderer())
root->notifyWidgets(notification);
}
}
AXObjectCache* FrameView::axObjectCache() const
{
if (frame() && frame()->document())
return frame()->document()->existingAXObjectCache();
return 0;
}
void FrameView::setScrollingPerformanceLoggingEnabled(bool flag)
{
#if USE(ACCELERATED_COMPOSITING)
if (TiledBacking* tiledBacking = this->tiledBacking())
tiledBacking->setScrollingPerformanceLoggingEnabled(flag);
#else
UNUSED_PARAM(flag);
#endif
}
void FrameView::didAddScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
{
ScrollableArea::didAddScrollbar(scrollbar, orientation);
if (AXObjectCache* cache = axObjectCache())
cache->handleScrollbarUpdate(this);
}
void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
{
ScrollableArea::willRemoveScrollbar(scrollbar, orientation);
if (AXObjectCache* cache = axObjectCache()) {
cache->remove(scrollbar);
cache->handleScrollbarUpdate(this);
}
}
void FrameView::addPaintPendingMilestones(LayoutMilestones milestones)
{
m_milestonesPendingPaint |= milestones;
}
void FrameView::firePaintRelatedMilestones()
{
Page* page = m_frame->page();
if (!page)
return;
LayoutMilestones milestonesAchieved = 0;
// Make sure the pending paint milestones have actually been requested before we send them.
if (m_milestonesPendingPaint & DidFirstFlushForHeaderLayer) {
if (page->requestedLayoutMilestones() & DidFirstFlushForHeaderLayer)
milestonesAchieved |= DidFirstFlushForHeaderLayer;
}
if (m_milestonesPendingPaint & DidFirstPaintAfterSuppressedIncrementalRendering) {
if (page->requestedLayoutMilestones() & DidFirstPaintAfterSuppressedIncrementalRendering)
milestonesAchieved |= DidFirstPaintAfterSuppressedIncrementalRendering;
}
m_milestonesPendingPaint = 0;
if (milestonesAchieved) {
if (Frame* frame = page->mainFrame())
frame->loader()->didLayout(milestonesAchieved);
}
}
void FrameView::setVisualUpdatesAllowedByClient(bool visualUpdatesAllowed)
{
if (m_visualUpdatesAllowedByClient == visualUpdatesAllowed)
return;
m_visualUpdatesAllowedByClient = visualUpdatesAllowed;
m_frame->document()->setVisualUpdatesAllowedByClient(visualUpdatesAllowed);
}
void FrameView::setScrollPinningBehavior(ScrollPinningBehavior pinning)
{
m_scrollPinningBehavior = pinning;
if (ScrollingCoordinator* scrollingCoordinator = m_frame->page()->scrollingCoordinator())
scrollingCoordinator->setScrollPinningBehavior(pinning);
updateScrollbars(scrollOffset());
}
} // namespace WebCore