/*
* 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 "CSSStyleSelector.h"
#include "CachedResourceLoader.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "DocumentMarkerController.h"
#include "EventHandler.h"
#include "FloatRect.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameActionScheduler.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "FrameTree.h"
#include "GraphicsContext.h"
#include "HTMLDocument.h"
#include "HTMLFrameElement.h"
#include "HTMLFrameSetElement.h"
#include "HTMLNames.h"
#include "HTMLPlugInImageElement.h"
#include "InspectorInstrumentation.h"
#include "OverflowEvent.h"
#include "RenderEmbeddedObject.h"
#include "RenderFullScreen.h"
#include "RenderLayer.h"
#include "RenderPart.h"
#include "RenderScrollbar.h"
#include "RenderScrollbarPart.h"
#include "RenderTheme.h"
#include "RenderView.h"
#include "ScrollAnimator.h"
#include "Settings.h"
#include "TextResourceDecoder.h"
#include <wtf/CurrentTime.h>
#if USE(ACCELERATED_COMPOSITING)
#include "RenderLayerCompositor.h"
#endif
#if ENABLE(SVG)
#include "SVGDocument.h"
#include "SVGLocatable.h"
#include "SVGNames.h"
#include "SVGPreserveAspectRatio.h"
#include "SVGSVGElement.h"
#include "SVGViewElement.h"
#include "SVGViewSpec.h"
#endif
#if ENABLE(TILED_BACKING_STORE)
#include "TiledBackingStore.h"
#endif
#if PLATFORM(ANDROID)
#include "WebCoreFrameBridge.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_deferredRepaintDelay = 0.025;
// 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_deferredRepaintDelay = 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;
FrameView::FrameView(Frame* frame)
: m_frame(frame)
, m_canHaveScrollbars(true)
, m_slowRepaintObjectCount(0)
, m_fixedObjectCount(0)
, m_layoutTimer(this, &FrameView::layoutTimerFired)
, m_layoutRoot(0)
, m_hasPendingPostLayoutTasks(false)
, m_inSynchronousPostLayout(false)
, m_postLayoutTasksTimer(this, &FrameView::postLayoutTimerFired)
, m_isTransparent(false)
, m_baseBackgroundColor(Color::white)
, m_mediaType("screen")
, m_actionScheduler(new FrameActionScheduler())
, m_overflowStatusDirty(true)
, m_viewportRenderer(0)
, m_wasScrolledByUser(false)
, m_inProgrammaticScroll(false)
, m_deferredRepaintTimer(this, &FrameView::deferredRepaintTimerFired)
, m_shouldUpdateWhileOffscreen(true)
, m_deferSetNeedsLayouts(0)
, m_setNeedsLayoutWasDeferred(false)
, m_scrollCorner(0)
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
, m_hasOverflowScroll(false)
#endif
{
init();
if (m_frame) {
if (Page* page = m_frame->page()) {
m_page = page;
m_page->addScrollableArea(this);
if (m_frame == m_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->pos(), initialSize));
view->setInitialBoundsSize(initialSize);
view->show();
return view.release();
}
FrameView::~FrameView()
{
if (m_hasPendingPostLayoutTasks) {
m_postLayoutTasksTimer.stop();
m_actionScheduler->clear();
}
if (AXObjectCache::accessibilityEnabled() && axObjectCache())
axObjectCache()->remove(this);
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_page)
m_page->removeScrollableArea(this);
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_useSlowRepaints = false;
m_isOverlapped = false;
m_contentIsOpaque = false;
m_borderX = 30;
m_borderY = 30;
m_layoutTimer.stop();
m_layoutRoot = 0;
m_delayedLayout = false;
m_doFullRepaint = true;
m_layoutSchedulingEnabled = true;
m_inLayout = false;
m_inSynchronousPostLayout = false;
m_hasPendingPostLayoutTasks = false;
m_layoutCount = 0;
m_nestedLayoutCount = 0;
m_postLayoutTasksTimer.stop();
m_firstLayout = true;
m_firstLayoutCallbackPending = false;
m_wasScrolledByUser = false;
m_lastLayoutSize = IntSize();
m_lastZoomFactor = 1.0f;
m_deferringRepaints = 0;
m_repaintCount = 0;
m_repaintRects.clear();
m_deferredRepaintDelay = s_initialDeferredRepaintDelayDuringLoading;
m_deferredRepaintTimer.stop();
m_lastPaintTime = 0;
m_paintBehavior = PaintBehaviorNormal;
m_isPainting = false;
m_isVisuallyNonEmpty = false;
m_firstVisuallyNonEmptyLayoutCallbackPending = true;
m_maintainScrollPositionAnchor = 0;
}
bool FrameView::isFrameView() const
{
return true;
}
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()
{
// Since the contents size is being cleared, the scroll position will lost as a consequence.
// Cache the scroll position so it can be restored by the page cache if necessary.
cacheCurrentScrollPosition();
resetScrollbars();
setScrollbarsSuppressed(true);
setContentsSize(IntSize());
setScrollbarsSuppressed(false);
}
void FrameView::init()
{
reset();
m_margins = IntSize(-1, -1); // undefined
m_size = IntSize();
// 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))) {
HTMLFrameElement* frameElt = static_cast<HTMLFrameElement*>(ownerElement);
if (frameElt->scrollingMode() == ScrollbarAlwaysOff)
setCanHaveScrollbars(false);
int marginWidth = frameElt->marginWidth();
int marginHeight = frameElt->marginHeight();
if (marginWidth != -1)
setMarginWidth(marginWidth);
if (marginHeight != -1)
setMarginHeight(marginHeight);
}
}
void FrameView::detachCustomScrollbars()
{
if (!m_frame)
return;
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::clear()
{
setCanBlitOnScroll(true);
reset();
if (m_frame) {
if (RenderPart* renderer = m_frame->ownerRenderer())
renderer->viewCleared();
}
setScrollbarsSuppressed(true);
}
bool FrameView::didFirstLayout() const
{
return !m_firstLayout;
}
void FrameView::invalidateRect(const IntRect& rect)
{
if (!parent()) {
if (hostWindow())
hostWindow()->invalidateContentsAndWindow(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;
ScrollView::setFrameRect(newRect);
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* root = m_frame->contentRenderer()) {
if (root->usesCompositing())
root->compositor()->frameViewDidChangeSize();
}
#endif
}
#if ENABLE(REQUEST_ANIMATION_FRAME)
void FrameView::scheduleAnimation()
{
if (hostWindow())
hostWindow()->scheduleAnimation();
}
#endif
void FrameView::setMarginWidth(int w)
{
// make it update the rendering area when set
m_margins.setWidth(w);
}
void FrameView::setMarginHeight(int h)
{
// make it update the rendering area when set
m_margins.setHeight(h);
}
bool FrameView::avoidScrollbarCreation() const
{
ASSERT(m_frame);
// with frame flattening no subframe can have scrollbars
// but we also cannot turn scrollbars of as we determine
// our flattening policy using that.
if (!m_frame->ownerElement())
return false;
if (!m_frame->settings() || m_frame->settings()->frameFlatteningEnabled())
return true;
return false;
}
void FrameView::setCanHaveScrollbars(bool canHaveScrollbars)
{
m_canHaveScrollbars = canHaveScrollbars;
ScrollView::setCanHaveScrollbars(canHaveScrollbars);
}
void FrameView::updateCanHaveScrollbars()
{
ScrollbarMode hMode;
ScrollbarMode vMode;
scrollbarModes(hMode, vMode);
if (hMode == ScrollbarAlwaysOff && vMode == ScrollbarAlwaysOff)
setCanHaveScrollbars(false);
else
setCanHaveScrollbars(true);
}
PassRefPtr<Scrollbar> FrameView::createScrollbar(ScrollbarOrientation orientation)
{
// 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->renderer()->enclosingBox());
// 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->renderBox());
// 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);
scrollAnimator()->contentsResized();
Page* page = frame() ? frame()->page() : 0;
if (!page)
return;
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()
{
ASSERT(m_frame->view() == this);
RenderView* root = m_frame->contentRenderer();
if (!root)
return;
IntSize size = IntSize(root->docWidth(), root->docHeight());
ScrollView::setScrollOrigin(IntPoint(-root->docLeft(), -root->docTop()), !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.
switch (o->style()->overflowX()) {
case OHIDDEN:
hMode = ScrollbarAlwaysOff;
break;
case OSCROLL:
hMode = ScrollbarAlwaysOn;
break;
case OAUTO:
hMode = ScrollbarAuto;
break;
default:
// Don't set it at all.
;
}
switch (o->style()->overflowY()) {
case OHIDDEN:
vMode = ScrollbarAlwaysOff;
break;
case OSCROLL:
vMode = ScrollbarAlwaysOn;
break;
case OAUTO:
vMode = ScrollbarAuto;
break;
default:
// Don't set it at all.
;
}
m_viewportRenderer = o;
}
void FrameView::calculateScrollbarModesForLayout(ScrollbarMode& hMode, ScrollbarMode& vMode)
{
m_viewportRenderer = 0;
const HTMLFrameOwnerElement* owner = m_frame->ownerElement();
if (owner && (owner->scrollingMode() == ScrollbarAlwaysOff)) {
hMode = ScrollbarAlwaysOff;
vMode = ScrollbarAlwaysOff;
return;
}
if (m_canHaveScrollbars) {
hMode = ScrollbarAuto;
vMode = ScrollbarAuto;
} else {
hMode = ScrollbarAlwaysOff;
vMode = ScrollbarAlwaysOff;
}
if (!m_layoutRoot) {
Document* document = m_frame->document();
Node* documentElement = document->documentElement();
RenderObject* rootRenderer = documentElement ? documentElement->renderer() : 0;
Node* body = document->body();
if (body && body->renderer()) {
if (body->hasTagName(framesetTag) && m_frame->settings() && !m_frame->settings()->frameFlatteningEnabled()) {
vMode = ScrollbarAlwaysOff;
hMode = ScrollbarAlwaysOff;
} else if (body->hasTagName(bodyTag)) {
// It's sufficient to just check the X overflow,
// since it's illegal to have visible in only one direction.
RenderObject* o = rootRenderer->style()->overflowX() == OVISIBLE && document->documentElement()->hasTagName(htmlTag) ? body->renderer() : rootRenderer;
applyOverflowToViewport(o, hMode, vMode);
}
} else if (rootRenderer) {
#if ENABLE(SVG)
if (!documentElement->isSVGElement())
applyOverflowToViewport(rootRenderer, hMode, vMode);
#else
applyOverflowToViewport(rootRenderer, hMode, vMode);
#endif
}
}
}
#if ENABLE(FULLSCREEN_API) && USE(ACCELERATED_COMPOSITING)
static bool isDocumentRunningFullScreenAnimation(Document* document)
{
return document->webkitIsFullScreen() && document->fullScreenRenderer() && document->fullScreenRenderer()->isAnimating();
}
#endif
#if USE(ACCELERATED_COMPOSITING)
void FrameView::updateCompositingLayers()
{
RenderView* view = m_frame->contentRenderer();
if (!view)
return;
// This call will make sure the cached hasAcceleratedCompositing is updated from the pref
view->compositor()->cacheAcceleratedCompositingFlags();
view->compositor()->updateCompositingLayers(CompositingUpdateAfterLayoutOrStyleChange);
#if ENABLE(FULLSCREEN_API)
Document* document = m_frame->document();
if (isDocumentRunningFullScreenAnimation(document))
view->compositor()->updateCompositingLayers(CompositingUpdateAfterLayoutOrStyleChange, document->fullScreenRenderer()->layer());
#endif
}
GraphicsLayer* FrameView::layerForHorizontalScrollbar() const
{
RenderView* view = m_frame->contentRenderer();
if (!view)
return 0;
return view->compositor()->layerForHorizontalScrollbar();
}
GraphicsLayer* FrameView::layerForVerticalScrollbar() const
{
RenderView* view = m_frame->contentRenderer();
if (!view)
return 0;
return view->compositor()->layerForVerticalScrollbar();
}
GraphicsLayer* FrameView::layerForScrollCorner() const
{
RenderView* view = m_frame->contentRenderer();
if (!view)
return 0;
return view->compositor()->layerForScrollCorner();
}
bool FrameView::syncCompositingStateForThisFrame()
{
ASSERT(m_frame->view() == this);
RenderView* view = m_frame->contentRenderer();
if (!view)
return true; // We don't want to keep trying to update layers if we have no renderer.
// 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 (GraphicsLayer* graphicsLayer = view->compositor()->layerForHorizontalScrollbar())
graphicsLayer->syncCompositingStateForThisLayerOnly();
if (GraphicsLayer* graphicsLayer = view->compositor()->layerForVerticalScrollbar())
graphicsLayer->syncCompositingStateForThisLayerOnly();
if (GraphicsLayer* graphicsLayer = view->compositor()->layerForScrollCorner())
graphicsLayer->syncCompositingStateForThisLayerOnly();
view->compositor()->flushPendingLayerChanges();
#if ENABLE(FULLSCREEN_API)
// The fullScreenRenderer's graphicsLayer has been re-parented, and the above recursive syncCompositingState
// call will not cause the subtree under it to repaint. Explicitly call the syncCompositingState on
// the fullScreenRenderer's graphicsLayer here:
Document* document = m_frame->document();
if (isDocumentRunningFullScreenAnimation(document)) {
#if PLATFORM(ANDROID)
// We don't create an extra layer for the full screen video.
if (!document->fullScreenRenderer()->layer()
|| !document->fullScreenRenderer()->layer()->backing())
return true;
#endif
RenderLayerBacking* backing = document->fullScreenRenderer()->layer()->backing();
if (GraphicsLayer* fullScreenLayer = backing->graphicsLayer())
fullScreenLayer->syncCompositingState();
}
#endif
return true;
}
void FrameView::setNeedsOneShotDrawingSynchronization()
{
Page* page = frame() ? frame()->page() : 0;
if (page)
page->chrome()->client()->setNeedsOneShotDrawingSynchronization();
}
#endif // USE(ACCELERATED_COMPOSITING)
bool FrameView::hasCompositedContent() const
{
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* view = m_frame->contentRenderer())
return view->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* view = m_frame->contentRenderer()) {
view->compositor()->enableCompositingMode();
if (!needsLayout())
view->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::syncCompositingStateIncludingSubframes()
{
#if USE(ACCELERATED_COMPOSITING)
bool allFramesSynced = syncCompositingStateForThisFrame();
for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->traverseNext(m_frame.get())) {
bool synced = child->view()->syncCompositingStateForThisFrame();
allFramesSynced &= synced;
}
return allFramesSynced;
#else // USE(ACCELERATED_COMPOSITING)
return true;
#endif
}
bool FrameView::isSoftwareRenderable() const
{
#if USE(ACCELERATED_COMPOSITING)
RenderView* view = m_frame->contentRenderer();
if (!view)
return true;
return !view->compositor()->has3DContent();
#else
return true;
#endif
}
void FrameView::didMoveOnscreen()
{
RenderView* view = m_frame->contentRenderer();
if (view)
view->didMoveOnscreen();
scrollAnimator()->contentAreaDidShow();
}
void FrameView::willMoveOffscreen()
{
RenderView* view = m_frame->contentRenderer();
if (view)
view->willMoveOffscreen();
scrollAnimator()->contentAreaDidHide();
}
RenderObject* FrameView::layoutRoot(bool onlyDuringLayout) const
{
return onlyDuringLayout && layoutPending() ? 0 : m_layoutRoot;
}
void FrameView::layout(bool allowSubtree)
{
if (m_inLayout)
return;
bool inSubframeLayoutWithFrameFlattening = parent() && m_frame->settings() && m_frame->settings()->frameFlatteningEnabled();
if (inSubframeLayoutWithFrameFlattening) {
if (parent()->isFrameView()) {
FrameView* parentView = static_cast<FrameView*>(parent());
if (!parentView->m_nestedLayoutCount) {
while (parentView->parent() && parentView->parent()->isFrameView())
parentView = static_cast<FrameView*>(parentView->parent());
parentView->layout(allowSubtree);
return;
}
}
}
m_layoutTimer.stop();
m_delayedLayout = false;
m_setNeedsLayoutWasDeferred = false;
// Protect the view from being deleted during layout (in recalcStyle)
RefPtr<FrameView> protector(this);
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();
m_layoutSchedulingEnabled = false;
if (!m_nestedLayoutCount && !m_inSynchronousPostLayout && m_hasPendingPostLayoutTasks && !inSubframeLayoutWithFrameFlattening) {
// This is a new top-level layout. If there are any remaining tasks from the previous
// layout, finish them now.
m_inSynchronousPostLayout = true;
m_postLayoutTasksTimer.stop();
performPostLayoutTasks();
m_inSynchronousPostLayout = false;
}
// Viewport-dependent media queries may cause us to need completely different style information.
// Check that here.
if (document->styleSelector()->affectedByViewportChange())
document->styleSelectorChanged(RecalcStyleImmediately);
// 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.
document->updateStyleIfNeeded();
bool 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;
RenderObject* root = subtree ? m_layoutRoot : document->renderer();
if (!root) {
// FIXME: Do we need to set m_size here?
m_layoutSchedulingEnabled = true;
return;
}
m_nestedLayoutCount++;
if (!m_layoutRoot) {
Document* document = m_frame->document();
Node* documentElement = document->documentElement();
RenderObject* rootRenderer = documentElement ? documentElement->renderer() : 0;
Node* body = document->body();
if (body && body->renderer()) {
if (body->hasTagName(framesetTag) && m_frame->settings() && !m_frame->settings()->frameFlatteningEnabled()) {
body->renderer()->setChildNeedsLayout(true);
} else if (body->hasTagName(bodyTag)) {
if (!m_firstLayout && m_size.height() != layoutHeight() && body->renderer()->enclosingBox()->stretchesToViewport())
body->renderer()->setChildNeedsLayout(true);
}
} else if (rootRenderer) {
#if ENABLE(SVG)
if (documentElement->isSVGElement()) {
if (!m_firstLayout && (m_size.width() != layoutWidth() || m_size.height() != layoutHeight()))
rootRenderer->setChildNeedsLayout(true);
}
#endif
}
#ifdef INSTRUMENT_LAYOUT_SCHEDULING
if (m_firstLayout && !m_frame->ownerElement())
printf("Elapsed time before first layout: %d\n", document->elapsedTime());
#endif
}
ScrollbarMode hMode;
ScrollbarMode vMode;
calculateScrollbarModesForLayout(hMode, vMode);
m_doFullRepaint = !subtree && (m_firstLayout || toRenderView(root)->printing());
if (!subtree) {
// Now set our scrollbar state for the layout.
ScrollbarMode currentHMode = horizontalScrollbarMode();
ScrollbarMode currentVMode = verticalScrollbarMode();
if (m_firstLayout || (hMode != currentHMode || vMode != currentVMode)) {
if (m_firstLayout) {
setScrollbarsSuppressed(true);
m_firstLayout = false;
m_firstLayoutCallbackPending = true;
m_lastLayoutSize = IntSize(width(), height());
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);
}
IntSize oldSize = m_size;
m_size = IntSize(layoutWidth(), layoutHeight());
if (oldSize != m_size) {
m_doFullRepaint = true;
if (!m_firstLayout) {
RenderBox* rootRenderer = document->documentElement() ? document->documentElement()->renderBox() : 0;
RenderBox* bodyRenderer = rootRenderer && document->body() ? document->body()->renderBox() : 0;
if (bodyRenderer && bodyRenderer->stretchesToViewport())
bodyRenderer->setChildNeedsLayout(true);
else if (rootRenderer && rootRenderer->stretchesToViewport())
rootRenderer->setChildNeedsLayout(true);
}
}
}
RenderLayer* layer = root->enclosingLayer();
m_actionScheduler->pause();
bool disableLayoutState = false;
if (subtree) {
RenderView* view = root->view();
disableLayoutState = view->shouldDisableLayoutStateForSubtree(root);
view->pushLayoutState(root);
if (disableLayoutState)
view->disableLayoutState();
}
m_inLayout = true;
beginDeferredRepaints();
root->layout();
endDeferredRepaints();
m_inLayout = false;
if (subtree) {
RenderView* view = root->view();
view->popLayoutState(root);
if (disableLayoutState)
view->enableLayoutState();
}
m_layoutRoot = 0;
m_layoutSchedulingEnabled = true;
if (!subtree && !toRenderView(root)->printing())
adjustViewSize();
// Now update the positions of all layers.
beginDeferredRepaints();
IntPoint cachedOffset;
if (m_doFullRepaint)
root->view()->repaint(); // FIXME: This isn't really right, since the RenderView doesn't fully encompass the visibleContentRect(). It just happens
// to work out most of the time, since first layouts and printing don't have you scrolled anywhere.
layer->updateLayerPositions((m_doFullRepaint ? 0 : RenderLayer::CheckForRepaint)
| RenderLayer::IsCompositingUpdateRoot
| RenderLayer::UpdateCompositingLayers,
subtree ? 0 : &cachedOffset);
endDeferredRepaints();
#if USE(ACCELERATED_COMPOSITING)
updateCompositingLayers();
#endif
m_layoutCount++;
#if PLATFORM(MAC) || PLATFORM(CHROMIUM)
if (AXObjectCache::accessibilityEnabled())
root->document()->axObjectCache()->postNotification(root, AXObjectCache::AXLayoutComplete, true);
#endif
#if ENABLE(DASHBOARD_SUPPORT)
updateDashboardRegions();
#endif
ASSERT(!root->needsLayout());
updateCanBlitOnScrollRecursively();
if (document->hasListenerType(Document::OVERFLOWCHANGED_LISTENER))
updateOverflowStatus(layoutWidth() < contentsWidth(),
layoutHeight() < contentsHeight());
if (!m_hasPendingPostLayoutTasks) {
if (!m_inSynchronousPostLayout && !inSubframeLayoutWithFrameFlattening) {
m_inSynchronousPostLayout = true;
// Calls resumeScheduledEvents()
performPostLayoutTasks();
m_inSynchronousPostLayout = false;
}
if (!m_hasPendingPostLayoutTasks && (needsLayout() || m_inSynchronousPostLayout || inSubframeLayoutWithFrameFlattening)) {
// 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_hasPendingPostLayoutTasks = true;
m_postLayoutTasksTimer.startOneShot(0);
if (needsLayout()) {
m_actionScheduler->pause();
layout();
}
}
} else {
m_actionScheduler->resume();
}
InspectorInstrumentation::didLayout(cookie);
m_nestedLayoutCount--;
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
// Reset to false each time we layout in case the overflow status changed.
bool hasOverflowScroll = false;
RenderObject* ownerRenderer = m_frame->ownerRenderer();
if (ownerRenderer && ownerRenderer->isRenderIFrame()) {
RenderLayer* layer = ownerRenderer->enclosingLayer();
if (layer) {
// Some sites use tiny iframes for loading so don't composite those.
if (canHaveScrollbars() && layoutWidth() > 1 && layoutHeight() > 1)
hasOverflowScroll = layoutWidth() < contentsWidth() || layoutHeight() < contentsHeight();
}
}
if (RenderView* view = m_frame->contentRenderer()) {
if (hasOverflowScroll != m_hasOverflowScroll) {
if (hasOverflowScroll)
enterCompositingMode();
else
// We are leaving overflow mode so we need to update the layer
// tree in case that is the reason we were composited.
view->compositor()->scheduleCompositingLayerUpdate();
}
}
m_hasOverflowScroll = hasOverflowScroll;
#endif
}
void FrameView::addWidgetToUpdate(RenderEmbeddedObject* object)
{
if (!m_widgetUpdateSet)
m_widgetUpdateSet.set(new RenderEmbeddedObjectSet);
m_widgetUpdateSet->add(object);
}
void FrameView::removeWidgetToUpdate(RenderEmbeddedObject* 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();
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() const
{
if (m_useSlowRepaints || m_slowRepaintObjectCount > 0 || (platformWidget() && m_fixedObjectCount > 0) || m_isOverlapped || !m_contentIsOpaque)
return true;
if (FrameView* parentView = parentFrameView())
return parentView->useSlowRepaints();
return false;
}
bool FrameView::useSlowRepaintsIfNotOverlapped() const
{
if (m_useSlowRepaints || m_slowRepaintObjectCount > 0 || (platformWidget() && m_fixedObjectCount > 0) || !m_contentIsOpaque)
return true;
if (FrameView* parentView = parentFrameView())
return parentView->useSlowRepaintsIfNotOverlapped();
return 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());
}
}
void FrameView::setUseSlowRepaints()
{
m_useSlowRepaints = true;
updateCanBlitOnScrollRecursively();
}
void FrameView::addSlowRepaintObject()
{
if (!m_slowRepaintObjectCount)
updateCanBlitOnScrollRecursively();
m_slowRepaintObjectCount++;
}
void FrameView::removeSlowRepaintObject()
{
ASSERT(m_slowRepaintObjectCount > 0);
m_slowRepaintObjectCount--;
if (!m_slowRepaintObjectCount)
updateCanBlitOnScrollRecursively();
}
void FrameView::addFixedObject()
{
if (!m_fixedObjectCount && platformWidget())
updateCanBlitOnScrollRecursively();
++m_fixedObjectCount;
}
void FrameView::removeFixedObject()
{
ASSERT(m_fixedObjectCount > 0);
--m_fixedObjectCount;
if (!m_fixedObjectCount)
updateCanBlitOnScrollRecursively();
}
#if PLATFORM(ANDROID)
// When the screen size change, fixed positioned element should be updated.
void FrameView::updatePositionedObjects()
{
RenderBlock::PositionedObjectsListHashSet* positionedObjects = 0;
if (RenderView* root = m_frame->contentRenderer())
positionedObjects = root->positionedObjects();
if (!positionedObjects || positionedObjects->isEmpty())
return;
RenderBlock::PositionedObjectsListHashSet::const_iterator end = positionedObjects->end();
for (RenderBlock::PositionedObjectsListHashSet::const_iterator it = positionedObjects->begin(); it != end; ++it) {
RenderBox* renderBox = *it;
if (renderBox->style()->position() != FixedPosition)
continue;
renderBox->computeLogicalWidth();
renderBox->computeLogicalHeight();
}
}
#endif
int FrameView::scrollXForFixedPosition() const
{
int visibleContentWidth = visibleContentRect().width();
int maxX = contentsWidth() - visibleContentWidth;
if (maxX == 0)
return 0;
int x = scrollX();
if (x < 0)
x = 0;
else if (x > maxX)
x = maxX;
if (!m_frame)
return x;
float pageScaleFactor = m_frame->pageScaleFactor();
// When the page is scaled, the scaled "viewport" with respect to which fixed object are positioned
// doesn't move as fast as the content view, so that when the content is scrolled all the way to the
// end, the bottom of the scaled "viewport" touches the bottom of the real viewport.
float dragFactor = (contentsWidth() - visibleContentWidth * pageScaleFactor) / maxX;
return x * dragFactor / pageScaleFactor;
}
int FrameView::scrollYForFixedPosition() const
{
int visibleContentHeight = visibleContentRect().height();
int maxY = contentsHeight() - visibleContentHeight;
if (maxY == 0)
return 0;
int y = scrollY();
if (y < 0)
y = 0;
else if (y > maxY)
y = maxY;
if (!m_frame)
return y;
float pageScaleFactor = m_frame->pageScaleFactor();
float dragFactor = (contentsHeight() - visibleContentHeight * pageScaleFactor) / maxY;
return y * dragFactor / pageScaleFactor;
}
IntSize FrameView::scrollOffsetForFixedPosition() const
{
return IntSize(scrollXForFixedPosition(), scrollYForFixedPosition());
}
IntPoint FrameView::currentMousePosition() const
{
return m_frame ? m_frame->eventHandler()->currentMousePosition() : IntPoint();
}
bool FrameView::scrollContentsFastPath(const IntSize& scrollDelta, const IntRect& rectToScroll, const IntRect& clipRect)
{
const size_t fixedObjectThreshold = 5;
RenderBlock::PositionedObjectsListHashSet* positionedObjects = 0;
if (RenderView* root = m_frame->contentRenderer())
positionedObjects = root->positionedObjects();
if (!positionedObjects || positionedObjects->isEmpty()) {
hostWindow()->scroll(scrollDelta, rectToScroll, clipRect);
return true;
}
// Get the rects of the fixed objects visible in the rectToScroll
Vector<IntRect, fixedObjectThreshold> subRectToUpdate;
bool updateInvalidatedSubRect = true;
RenderBlock::PositionedObjectsListHashSet::const_iterator end = positionedObjects->end();
for (RenderBlock::PositionedObjectsListHashSet::const_iterator it = positionedObjects->begin(); it != end; ++it) {
RenderBox* renderBox = *it;
if (renderBox->style()->position() != FixedPosition)
continue;
IntRect updateRect = renderBox->layer()->repaintRectIncludingDescendants();
updateRect = contentsToWindow(updateRect);
if (clipsRepaints())
updateRect.intersect(rectToScroll);
if (!updateRect.isEmpty()) {
if (subRectToUpdate.size() >= fixedObjectThreshold) {
updateInvalidatedSubRect = false;
break;
}
subRectToUpdate.append(updateRect);
}
}
// Scroll the view
if (updateInvalidatedSubRect) {
// 1) scroll
hostWindow()->scroll(scrollDelta, rectToScroll, clipRect);
// 2) update the area of fixed objects that has been invalidated
size_t fixObjectsCount = subRectToUpdate.size();
for (size_t i = 0; i < fixObjectsCount; ++i) {
IntRect updateRect = subRectToUpdate[i];
IntRect scrolledRect = updateRect;
scrolledRect.move(scrollDelta);
updateRect.unite(scrolledRect);
if (clipsRepaints())
updateRect.intersect(rectToScroll);
hostWindow()->invalidateContentsAndWindow(updateRect, false);
}
return true;
}
// the number of fixed objects exceed the threshold, we cannot use the fast path
return false;
}
void FrameView::scrollContentsSlowPath(const IntRect& updateRect)
{
#if USE(ACCELERATED_COMPOSITING)
if (RenderPart* frameRenderer = m_frame->ownerRenderer()) {
if (frameRenderer->containerForRepaint()) {
IntRect rect(frameRenderer->borderLeft() + frameRenderer->paddingLeft(),
frameRenderer->borderTop() + frameRenderer->paddingTop(),
visibleWidth(), visibleHeight());
frameRenderer->repaintRectangle(rect);
return;
}
}
#endif
ScrollView::scrollContentsSlowPath(updateRect);
}
// Note that this gets called at painting time.
void FrameView::setIsOverlapped(bool isOverlapped)
{
if (isOverlapped == m_isOverlapped)
return;
m_isOverlapped = isOverlapped;
updateCanBlitOnScrollRecursively();
#if USE(ACCELERATED_COMPOSITING)
if (hasCompositedContentIncludingDescendants()) {
// Overlap can affect compositing tests, so if it changes, we need to trigger
// a layer update in the parent document.
if (Frame* parentFrame = m_frame->tree()->parent()) {
if (RenderView* parentView = parentFrame->contentRenderer()) {
RenderLayerCompositor* compositor = parentView->compositor();
compositor->setCompositingLayersNeedRebuild();
compositor->scheduleCompositingLayerUpdate();
}
}
if (RenderLayerCompositor::allowsIndependentlyCompositedFrames(this)) {
// We also need to trigger reevaluation for this and all descendant frames,
// since a frame uses compositing if any ancestor is compositing.
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext(m_frame.get())) {
if (RenderView* view = frame->contentRenderer()) {
RenderLayerCompositor* compositor = view->compositor();
compositor->setCompositingLayersNeedRebuild();
compositor->scheduleCompositingLayerUpdate();
}
}
}
}
#endif
}
bool FrameView::isOverlappedIncludingAncestors() const
{
if (isOverlapped())
return true;
if (FrameView* parentView = parentFrameView()) {
if (parentView->isOverlapped())
return true;
}
return false;
}
void FrameView::setContentIsOpaque(bool contentIsOpaque)
{
if (contentIsOpaque == m_contentIsOpaque)
return;
m_contentIsOpaque = contentIsOpaque;
updateCanBlitOnScrollRecursively();
}
void FrameView::restoreScrollbar()
{
setScrollbarsSuppressed(false);
}
bool FrameView::scrollToFragment(const KURL& url)
{
// If our URL has no ref, then we have no place we need to jump to.
// OTOH If CSS target was set previously, we want to set it to 0, recalc
// and possibly repaint because :target pseudo class may have been
// set (see bug 11321).
if (!url.hasFragmentIdentifier() && !m_frame->document()->cssTarget())
return false;
String fragmentIdentifier = url.fragmentIdentifier();
if (scrollToAnchor(fragmentIdentifier))
return true;
// Try again after decoding the ref, based on the document's encoding.
if (TextResourceDecoder* decoder = m_frame->document()->decoder())
return scrollToAnchor(decodeURLEscapeSequences(fragmentIdentifier, decoder->encoding()));
return false;
}
bool FrameView::scrollToAnchor(const String& name)
{
ASSERT(m_frame->document());
if (!m_frame->document()->haveStylesheetsLoaded()) {
m_frame->document()->setGotoAnchorNeededAfterStylesheetsLoad(true);
return false;
}
m_frame->document()->setGotoAnchorNeededAfterStylesheetsLoad(false);
Element* anchorNode = m_frame->document()->findAnchor(name);
#if ENABLE(SVG)
if (m_frame->document()->isSVGDocument()) {
if (name.startsWith("xpointer(")) {
// We need to parse the xpointer reference here
} else if (name.startsWith("svgView(")) {
RefPtr<SVGSVGElement> svg = static_cast<SVGDocument*>(m_frame->document())->rootElement();
if (!svg->currentView()->parseViewSpec(name))
return false;
svg->setUseCurrentView(true);
} else {
if (anchorNode && anchorNode->hasTagName(SVGNames::viewTag)) {
RefPtr<SVGViewElement> viewElement = anchorNode->hasTagName(SVGNames::viewTag) ? static_cast<SVGViewElement*>(anchorNode) : 0;
if (viewElement.get()) {
SVGElement* element = SVGLocatable::nearestViewportElement(viewElement.get());
if (element->hasTagName(SVGNames::svgTag)) {
RefPtr<SVGSVGElement> svg = static_cast<SVGSVGElement*>(element);
svg->inheritViewAttributes(viewElement.get());
}
}
}
}
// FIXME: need to decide which <svg> to focus on, and zoom to that one
// FIXME: need to actually "highlight" the viewTarget(s)
}
#endif
m_frame->document()->setCSSTarget(anchorNode); // Setting to null will clear the current target.
// Implement the rule that "" and "top" both mean top of page as in other browsers.
if (!anchorNode && !(name.isEmpty() || equalIgnoringCase(name, "top")))
return false;
maintainScrollPositionAtAnchor(anchorNode ? static_cast<Node*>(anchorNode) : m_frame->document());
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.
if (m_frame->contentRenderer() && m_frame->contentRenderer()->needsLayout())
layout();
else
scrollToAnchor();
}
void FrameView::setScrollPosition(const IntPoint& scrollPoint)
{
bool wasInProgrammaticScroll = m_inProgrammaticScroll;
m_inProgrammaticScroll = true;
m_maintainScrollPositionAnchor = 0;
ScrollView::setScrollPosition(scrollPoint);
m_inProgrammaticScroll = wasInProgrammaticScroll;
}
void FrameView::scrollPositionChangedViaPlatformWidget()
{
repaintFixedElementsAfterScrolling();
scrollPositionChanged();
}
void FrameView::scrollPositionChanged()
{
frame()->eventHandler()->sendScrollEvent();
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* root = m_frame->contentRenderer()) {
if (root->usesCompositing())
root->compositor()->frameViewDidScroll(scrollPosition());
}
#endif
}
void FrameView::repaintFixedElementsAfterScrolling()
{
// For fixed position elements, update widget positions and compositing layers after scrolling,
// but only if we're not inside of layout.
if (!m_nestedLayoutCount && hasFixedObjects()) {
if (RenderView* root = m_frame->contentRenderer()) {
root->updateWidgetPositions();
root->layer()->updateRepaintRectsAfterScroll();
#if USE(ACCELERATED_COMPOSITING)
root->compositor()->updateCompositingLayers(CompositingUpdateOnScroll);
#endif
}
}
}
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());
double delay = m_deferringRepaints ? 0 : adjustedDeferredRepaintDelay();
if ((m_deferringRepaints || m_deferredRepaintTimer.isActive() || delay) && !immediate) {
IntRect paintRect = r;
if (clipsRepaints() && !paintsEntireContents())
paintRect.intersect(visibleContentRect());
#ifdef ANDROID_CAPTURE_OFFSCREEN_PAINTS
if (r != paintRect)
ScrollView::platformOffscreenContentRectangle(visibleContentRect(), r);
#endif
if (paintRect.isEmpty())
return;
if (m_repaintCount == cRepaintRectUnionThreshold) {
IntRect unionedRect;
for (unsigned i = 0; i < cRepaintRectUnionThreshold; ++i)
unionedRect.unite(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 && !m_deferredRepaintTimer.isActive())
m_deferredRepaintTimer.startOneShot(delay);
return;
}
if (!shouldUpdate(immediate))
return;
#if ENABLE(TILED_BACKING_STORE)
if (frame()->tiledBackingStore()) {
frame()->tiledBackingStore()->invalidate(r);
return;
}
#endif
ScrollView::repaintContentRectangle(r, immediate);
}
void FrameView::contentsResized()
{
scrollAnimator()->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 (needsLayout())
layout();
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* root = m_frame->contentRenderer()) {
if (root->usesCompositing())
root->compositor()->frameViewDidChangeSize();
}
#endif
}
void FrameView::beginDeferredRepaints()
{
Page* page = m_frame->page();
if (page->mainFrame() != m_frame)
return page->mainFrame()->view()->beginDeferredRepaints();
m_deferringRepaints++;
}
void FrameView::endDeferredRepaints()
{
Page* page = m_frame->page();
if (page->mainFrame() != m_frame)
return page->mainFrame()->view()->endDeferredRepaints();
ASSERT(m_deferringRepaints > 0);
if (--m_deferringRepaints)
return;
if (m_deferredRepaintTimer.isActive())
return;
if (double delay = adjustedDeferredRepaintDelay()) {
m_deferredRepaintTimer.startOneShot(delay);
return;
}
doDeferredRepaints();
}
void FrameView::checkStopDelayingDeferredRepaints()
{
if (!m_deferredRepaintTimer.isActive())
return;
Document* document = m_frame->document();
if (document && (document->parsing() || document->cachedResourceLoader()->requestCount()))
return;
m_deferredRepaintTimer.stop();
doDeferredRepaints();
}
void FrameView::doDeferredRepaints()
{
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 ENABLE(TILED_BACKING_STORE)
if (frame()->tiledBackingStore()) {
frame()->tiledBackingStore()->invalidate(m_repaintRects[i]);
continue;
}
#endif
ScrollView::repaintContentRectangle(m_repaintRects[i], false);
}
m_repaintRects.clear();
m_repaintCount = 0;
updateDeferredRepaintDelay();
}
void FrameView::updateDeferredRepaintDelay()
{
Document* document = m_frame->document();
if (!document || (!document->parsing() && !document->cachedResourceLoader()->requestCount())) {
m_deferredRepaintDelay = s_deferredRepaintDelay;
return;
}
if (m_deferredRepaintDelay < s_maxDeferredRepaintDelayDuringLoading) {
m_deferredRepaintDelay += s_deferredRepaintDelayIncrementDuringLoading;
if (m_deferredRepaintDelay > s_maxDeferredRepaintDelayDuringLoading)
m_deferredRepaintDelay = s_maxDeferredRepaintDelayDuringLoading;
}
}
void FrameView::resetDeferredRepaintDelay()
{
m_deferredRepaintDelay = 0;
if (m_deferredRepaintTimer.isActive()) {
m_deferredRepaintTimer.stop();
if (!m_deferringRepaints)
doDeferredRepaints();
}
}
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::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;
// When frame flattening is enabled, the contents of the frame affects layout of the parent frames.
// Also invalidate parent frame starting from the owner element of this frame.
if (m_frame->settings() && m_frame->settings()->frameFlatteningEnabled() && m_frame->ownerRenderer()) {
if (m_frame->ownerElement()->hasTagName(iframeTag) || m_frame->ownerElement()->hasTagName(frameTag))
m_frame->ownerRenderer()->setNeedsLayout(true, true);
}
#ifdef ANDROID_FLATTEN_FRAMESET
if (m_frame->ownerRenderer() && m_frame->ownerElement()->hasTagName(frameTag))
m_frame->ownerRenderer()->setNeedsLayoutAndPrefWidthsRecalc();
#endif
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);
if (m_frame->contentRenderer() && m_frame->contentRenderer()->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());
} else {
// Just do a full relayout
if (m_layoutRoot)
m_layoutRoot->markContainingBlocksForLayout(false);
m_layoutRoot = 0;
relayoutRoot->markContainingBlocksForLayout(false);
}
}
} else if (m_layoutSchedulingEnabled) {
int delay = m_frame->document()->minimumLayoutDelay();
m_layoutRoot = relayoutRoot;
ASSERT(!m_layoutRoot->container() || !m_layoutRoot->container()->needsLayout());
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* root = m_frame->contentRenderer();
return layoutPending()
|| (root && root->needsLayout())
|| m_layoutRoot
|| (m_deferSetNeedsLayouts && m_setNeedsLayoutWasDeferred);
}
void FrameView::setNeedsLayout()
{
if (m_deferSetNeedsLayouts) {
m_setNeedsLayoutWasDeferred = true;
return;
}
RenderView* root = m_frame->contentRenderer();
if (root)
root->setNeedsLayout(true);
}
void FrameView::unscheduleRelayout()
{
m_postLayoutTasksTimer.stop();
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(DOMTimeStamp time)
{
for (Frame* frame = m_frame.get(); frame; frame = frame->tree()->traverseNext())
frame->document()->serviceScriptedAnimations(time);
}
#endif
bool FrameView::isTransparent() const
{
return m_isTransparent;
}
void FrameView::setTransparent(bool isTransparent)
{
m_isTransparent = isTransparent;
}
Color FrameView::baseBackgroundColor() const
{
return m_baseBackgroundColor;
}
void FrameView::setBaseBackgroundColor(const Color& backgroundColor)
{
if (!backgroundColor.isValid())
m_baseBackgroundColor = Color::white;
else
m_baseBackgroundColor = backgroundColor;
}
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;
IntRect rect;
if (anchorNode != m_frame->document())
rect = anchorNode->getRect();
// Scroll nested layers and frames to reveal the anchor.
// Align to the top and to the closest side (this matches other browsers).
anchorNode->renderer()->enclosingLayer()->scrollRectToVisible(rect, true, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignTopAlways);
if (AXObjectCache::accessibilityEnabled())
m_frame->document()->axObjectCache()->handleScrolledToAnchor(anchorNode.get());
// scrollRectToVisible can call into setScrollPosition(), which resets m_maintainScrollPositionAnchor.
m_maintainScrollPositionAnchor = anchorNode;
}
void FrameView::updateWidget(RenderEmbeddedObject* object)
{
ASSERT(!object->node() || object->node()->isElementNode());
Element* ownerElement = static_cast<Element*>(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;
// No need to update if it's already crashed or known to be missing.
if (object->pluginCrashedOrWasMissing())
return;
// FIXME: This could turn into a real virtual dispatch if we defined
// updateWidget(bool) on HTMLElement.
if (ownerElement->hasTagName(objectTag) || ownerElement->hasTagName(embedTag))
static_cast<HTMLPlugInImageElement*>(ownerElement)->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->hasTagName(videoTag) || ownerElement->hasTagName(audioTag))
static_cast<HTMLMediaElement*>(ownerElement)->updateWidget(CreateAnyWidgetType);
#endif
else
ASSERT_NOT_REACHED();
// Caution: it's possible the object was destroyed again, since loading a
// plugin may run any arbitrary javascript.
object->updateWidgetPosition();
}
bool FrameView::updateWidgets()
{
if (m_nestedLayoutCount > 1 || !m_widgetUpdateSet || m_widgetUpdateSet->isEmpty())
return true;
size_t size = m_widgetUpdateSet->size();
Vector<RenderEmbeddedObject*> objects;
objects.reserveCapacity(size);
RenderEmbeddedObjectSet::const_iterator end = m_widgetUpdateSet->end();
for (RenderEmbeddedObjectSet::const_iterator it = m_widgetUpdateSet->begin(); it != end; ++it) {
objects.uncheckedAppend(*it);
(*it)->ref();
}
for (size_t i = 0; i < size; ++i) {
RenderEmbeddedObject* object = objects[i];
updateWidget(object);
m_widgetUpdateSet->remove(object);
}
RenderArena* arena = m_frame->document()->renderArena();
for (size_t i = 0; i < size; ++i)
objects[i]->deref(arena);
return m_widgetUpdateSet->isEmpty();
}
void FrameView::flushAnyPendingPostLayoutTasks()
{
if (!m_hasPendingPostLayoutTasks)
return;
m_postLayoutTasksTimer.stop();
performPostLayoutTasks();
}
void FrameView::performPostLayoutTasks()
{
m_hasPendingPostLayoutTasks = false;
m_frame->selection()->setCaretRectNeedsUpdate();
m_frame->selection()->updateAppearance();
if (m_nestedLayoutCount <= 1) {
if (m_firstLayoutCallbackPending) {
m_firstLayoutCallbackPending = false;
m_frame->loader()->didFirstLayout();
}
if (m_isVisuallyNonEmpty && m_firstVisuallyNonEmptyLayoutCallbackPending) {
m_firstVisuallyNonEmptyLayoutCallbackPending = false;
m_frame->loader()->didFirstVisuallyNonEmptyLayout();
}
}
RenderView* root = m_frame->contentRenderer();
root->updateWidgetPositions();
for (unsigned i = 0; i < maxUpdateWidgetsIterations; i++) {
if (updateWidgets())
break;
}
scrollToAnchor();
m_actionScheduler->resume();
if (!root->printing()) {
IntSize currentSize = IntSize(width(), height());
float currentZoomFactor = root->style()->zoom();
bool resized = !m_firstLayout && (currentSize != m_lastLayoutSize || currentZoomFactor != m_lastZoomFactor);
m_lastLayoutSize = currentSize;
m_lastZoomFactor = currentZoomFactor;
if (resized)
m_frame->eventHandler()->sendResizeEvent();
}
}
void FrameView::postLayoutTimerFired(Timer<FrameView>*)
{
performPostLayoutTasks();
}
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());
}
}
IntRect FrameView::windowClipRect(bool clipToContents) const
{
ASSERT(m_frame->view() == this);
if (paintsEntireContents())
return IntRect(IntPoint(0, 0), contentsSize());
// Set our clip rect to be our contents.
IntRect clipRect = contentsToWindow(visibleContentRect(!clipToContents));
if (!m_frame || !m_frame->ownerElement())
return clipRect;
// Take our owner element and get the clip rect from the enclosing layer.
Element* elt = m_frame->ownerElement();
RenderLayer* layer = elt->renderer()->enclosingLayer();
// FIXME: layer should never be null, but sometimes seems to be anyway.
if (!layer)
return clipRect;
FrameView* parentView = elt->document()->view();
clipRect.intersect(parentView->windowClipRectForLayer(layer, true));
return clipRect;
}
IntRect FrameView::windowClipRectForLayer(const RenderLayer* layer, bool clipToLayerContents) const
{
// If we have no layer, just return our window clip rect.
if (!layer)
return windowClipRect();
// Apply the clip from the layer.
IntRect clipRect;
if (clipToLayerContents)
clipRect = layer->childrenClipRect();
else
clipRect = layer->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)
{
IntSize 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.move(scrollbar->x(), scrollbar->y());
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();
}
void FrameView::didCompleteRubberBand(const IntSize& initialOverhang) const
{
Page* page = m_frame->page();
if (page->mainFrame() != m_frame)
return;
return page->chrome()->client()->didCompleteRubberBandForMainFrame(initialOverhang);
}
void FrameView::scrollbarStyleChanged()
{
Page* page = m_frame->page();
ASSERT(page);
if (!page)
return;
page->setNeedsRecalcStyleInAllFrames();
}
bool FrameView::shouldSuspendScrollAnimations() const
{
return m_frame->loader()->state() != FrameStateComplete;
}
void FrameView::notifyPageThatContentAreaWillPaint() const
{
Page* page = m_frame->page();
const HashSet<ScrollableArea*>* scrollableAreas = page->scrollableAreaSet();
if (!scrollableAreas)
return;
HashSet<ScrollableArea*>::const_iterator end = scrollableAreas->end();
for (HashSet<ScrollableArea*>::const_iterator it = scrollableAreas->begin(); it != end; ++it)
(*it)->scrollAnimator()->contentAreaWillPaint();
}
#if ENABLE(DASHBOARD_SUPPORT)
void FrameView::updateDashboardRegions()
{
Document* document = m_frame->document();
if (!document->hasDashboardRegions())
return;
Vector<DashboardRegionValue> newRegions;
document->renderBox()->collectDashboardRegions(newRegions);
if (newRegions == document->dashboardRegions())
return;
document->setDashboardRegions(newRegions);
Page* page = m_frame->page();
if (!page)
return;
page->chrome()->client()->dashboardRegionsChanged();
}
#endif
void FrameView::updateScrollCorner()
{
RenderObject* renderer = 0;
RefPtr<RenderStyle> cornerStyle;
if (!scrollCornerRect().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(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(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(SCROLLBAR_CORNER, renderer->style());
}
}
if (cornerStyle) {
if (!m_scrollCorner)
m_scrollCorner = new (renderer->renderArena()) RenderScrollbarPart(renderer->document());
m_scrollCorner->setStyle(cornerStyle.release());
invalidateScrollCorner();
} 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) {
m_scrollCorner->paintIntoRect(context, cornerRect.x(), cornerRect.y(), cornerRect);
return;
}
ScrollView::paintScrollCorner(context, cornerRect);
}
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 (static_cast<FrameView*>(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 (Widget* parentView = parent()) {
if (parentView->isFrameView())
return static_cast<FrameView*>(parentView);
}
return 0;
}
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;
if ((m_frame->contentRenderer() && m_frame->contentRenderer()->theme()->supportsControlTints()) || hasCustomScrollbars()) {
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;
m_wasScrolledByUser = wasScrolledByUser;
}
void FrameView::paintContents(GraphicsContext* p, const IntRect& rect)
{
if (!frame())
return;
InspectorInstrumentationCookie cookie = InspectorInstrumentation::willPaint(m_frame.get(), rect);
Document* document = m_frame->document();
#ifndef NDEBUG
bool fillWithRed;
if (document->printing())
fillWithRed = false; // Printing, don't fill with red (can't remember why).
else if (m_frame->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
bool isTopLevelPainter = !sCurrentPaintTimeStamp;
if (isTopLevelPainter)
sCurrentPaintTimeStamp = currentTime();
RenderView* contentRenderer = frame()->contentRenderer();
if (!contentRenderer) {
LOG_ERROR("called FrameView::paint with nil renderer");
return;
}
ASSERT(!needsLayout());
if (needsLayout())
return;
#if USE(ACCELERATED_COMPOSITING)
if (!p->paintingDisabled())
syncCompositingStateForThisFrame();
#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 = contentRenderer->layer();
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();
#if ENABLE(DASHBOARD_SUPPORT)
// Regions may have changed as a result of the visibility/z-index of element changing.
if (document->dashboardRegionsDirty())
updateDashboardRegions();
#endif
if (isTopLevelPainter)
sCurrentPaintTimeStamp = 0;
InspectorInstrumentation::didPaint(cookie);
}
void FrameView::setPaintBehavior(PaintBehavior behavior)
{
m_paintBehavior = behavior;
}
PaintBehavior FrameView::paintBehavior() const
{
return m_paintBehavior;
}
bool FrameView::isPainting() const
{
return m_isPainting;
}
void FrameView::setNodeToDraw(Node* node)
{
m_nodeToDraw = node;
}
void FrameView::paintOverhangAreas(GraphicsContext* context, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect)
{
if (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;
}
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();
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())
static_cast<FrameView*>(widget)->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();
}
void FrameView::flushDeferredRepaints()
{
if (!m_deferredRepaintTimer.isActive())
return;
m_deferredRepaintTimer.stop();
doDeferredRepaints();
}
void FrameView::forceLayout(bool allowSubtree)
{
layout(allowSubtree);
}
void FrameView::forceLayoutForPagination(const FloatSize& pageSize, float maximumShrinkFactor, Frame::AdjustViewSizeOrNot shouldAdjustViewSize)
{
// Dumping externalRepresentation(m_frame->renderer()).ascii() is a good trick to see
// the state of things before and after the layout
RenderView *root = toRenderView(m_frame->document()->renderer());
if (root) {
float pageLogicalWidth = root->style()->isHorizontalWritingMode() ? pageSize.width() : pageSize.height();
float pageLogicalHeight = root->style()->isHorizontalWritingMode() ? pageSize.height() : pageSize.width();
int flooredPageLogicalWidth = static_cast<int>(pageLogicalWidth);
root->setLogicalWidth(flooredPageLogicalWidth);
root->setPageLogicalHeight(pageLogicalHeight);
root->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!
int docLogicalWidth = root->style()->isHorizontalWritingMode() ? root->docWidth() : root->docHeight();
if (docLogicalWidth > pageLogicalWidth) {
flooredPageLogicalWidth = std::min<int>(docLogicalWidth, pageLogicalWidth * maximumShrinkFactor);
if (pageLogicalHeight)
root->setPageLogicalHeight(flooredPageLogicalWidth / pageSize.width() * pageSize.height());
root->setLogicalWidth(flooredPageLogicalWidth);
root->setNeedsLayoutAndPrefWidthsRecalc();
forceLayout();
int docLogicalHeight = root->style()->isHorizontalWritingMode() ? root->docHeight() : root->docWidth();
int docLogicalTop = root->style()->isHorizontalWritingMode() ? root->docTop() : root->docLeft();
int docLogicalRight = root->style()->isHorizontalWritingMode() ? root->docRight() : root->docBottom();
int clippedLogicalLeft = 0;
if (!root->style()->isLeftToRightDirection())
clippedLogicalLeft = docLogicalRight - flooredPageLogicalWidth;
IntRect overflow(clippedLogicalLeft, docLogicalTop, flooredPageLogicalWidth, docLogicalHeight);
if (!root->style()->isHorizontalWritingMode())
overflow = overflow.transposedRect();
root->clearLayoutOverflow();
root->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* root = m_frame->contentRenderer();
if (root) {
// Use a context with painting disabled.
GraphicsContext context((PlatformGraphicsContext*)0);
root->setTruncatedAt((int)floorf(oldBottom));
IntRect dirtyRect(0, (int)floorf(oldTop), root->maxXLayoutOverflow(), (int)ceilf(oldBottom - oldTop));
root->setPrintRect(dirtyRect);
root->layer()->paint(&context, dirtyRect);
*newBottom = root->bestTruncatedAt();
if (*newBottom == 0)
*newBottom = oldBottom;
root->setPrintRect(IntRect());
} else
*newBottom = oldBottom;
}
IntRect FrameView::convertFromRenderer(const RenderObject* renderer, const IntRect& rendererRect) const
{
IntRect rect = renderer->localToAbsoluteQuad(FloatRect(rendererRect)).enclosingBoundingBox();
// Convert from page ("absolute") to FrameView coordinates.
rect.move(-scrollX(), -scrollY());
return rect;
}
IntRect FrameView::convertToRenderer(const RenderObject* renderer, const IntRect& viewRect) const
{
IntRect rect = viewRect;
// Convert from FrameView coords into page ("absolute") coordinates.
rect.move(scrollX(), scrollY());
// 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(), false, true /* use transforms */)));
return rect;
}
IntPoint FrameView::convertFromRenderer(const RenderObject* renderer, const IntPoint& rendererPoint) const
{
IntPoint point = roundedIntPoint(renderer->localToAbsolute(rendererPoint, false, true /* use transforms */));
// Convert from page ("absolute") to FrameView coordinates.
point.move(-scrollX(), -scrollY());
return point;
}
IntPoint FrameView::convertToRenderer(const RenderObject* renderer, const IntPoint& viewPoint) const
{
IntPoint point = viewPoint;
// Convert from FrameView coords into page ("absolute") coordinates.
point += IntSize(scrollX(), scrollY());
return roundedIntPoint(renderer->absoluteToLocal(point, false, true /* use transforms */));
}
IntRect FrameView::convertToContainingView(const IntRect& localRect) const
{
if (const ScrollView* parentScrollView = parent()) {
if (parentScrollView->isFrameView()) {
const FrameView* parentView = static_cast<const FrameView*>(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 = static_cast<const FrameView*>(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 = static_cast<const FrameView*>(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 = static_cast<const FrameView*>(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_deferredRepaintDelay = 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;
}
bool FrameView::isVerticalDocument() const
{
if (!m_frame)
return true;
Document* doc = m_frame->document();
if (!doc)
return true;
RenderObject* renderView = doc->renderer();
if (!renderView)
return true;
return renderView->style()->isHorizontalWritingMode();
}
bool FrameView::isFlippedDocument() const
{
if (!m_frame)
return false;
Document* doc = m_frame->document();
if (!doc)
return false;
RenderObject* renderView = doc->renderer();
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() && frame()->document()->axObjectCacheExists())
return frame()->document()->axObjectCache();
return 0;
}
} // namespace WebCore