blob: ede863f3ed68c9bf79c8213438a23c1415b6b2de [file] [log] [blame]
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple 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 "RenderView.h"
#include "Document.h"
#include "Element.h"
#include "FloatQuad.h"
#include "Frame.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "HTMLBodyElement.h"
#include "HTMLFrameOwnerElement.h"
#include "HTMLFrameSetElement.h"
#include "HTMLHtmlElement.h"
#include "HTMLIFrameElement.h"
#include "HitTestResult.h"
#include "ImageQualityController.h"
#include "NodeTraversal.h"
#include "Page.h"
#include "RenderDescendantIterator.h"
#include "RenderGeometryMap.h"
#include "RenderIterator.h"
#include "RenderLayer.h"
#include "RenderLayerBacking.h"
#include "RenderLayerCompositor.h"
#include "RenderLayoutState.h"
#include "RenderMultiColumnFlow.h"
#include "RenderMultiColumnSet.h"
#include "RenderMultiColumnSpannerPlaceholder.h"
#include "RenderQuote.h"
#include "RenderTreeBuilder.h"
#include "RenderWidget.h"
#include "Settings.h"
#include "StyleInheritedData.h"
#include "TransformState.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/SetForScope.h>
#include <wtf/StackStats.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderView);
RenderView::RenderView(Document& document, RenderStyle&& style)
: RenderBlockFlow(document, WTFMove(style))
, m_frameView(*document.view())
, m_selection(*this)
, m_lazyRepaintTimer(*this, &RenderView::lazyRepaintTimerFired)
{
setIsRenderView();
// FIXME: We should find a way to enforce this at compile time.
ASSERT(document.view());
// init RenderObject attributes
setInline(false);
m_minPreferredLogicalWidth = 0;
m_maxPreferredLogicalWidth = 0;
setPreferredLogicalWidthsDirty(true, MarkOnlyThis);
setPositionState(PositionType::Absolute); // to 0,0 :)
}
RenderView::~RenderView()
{
ASSERT_WITH_MESSAGE(m_rendererCount == 1, "All other renderers in this render tree should have been destroyed");
}
void RenderView::scheduleLazyRepaint(RenderBox& renderer)
{
if (renderer.renderBoxNeedsLazyRepaint())
return;
renderer.setRenderBoxNeedsLazyRepaint(true);
m_renderersNeedingLazyRepaint.add(&renderer);
if (!m_lazyRepaintTimer.isActive())
m_lazyRepaintTimer.startOneShot(0_s);
}
void RenderView::unscheduleLazyRepaint(RenderBox& renderer)
{
if (!renderer.renderBoxNeedsLazyRepaint())
return;
renderer.setRenderBoxNeedsLazyRepaint(false);
m_renderersNeedingLazyRepaint.remove(&renderer);
if (m_renderersNeedingLazyRepaint.isEmpty())
m_lazyRepaintTimer.stop();
}
void RenderView::lazyRepaintTimerFired()
{
for (auto& renderer : m_renderersNeedingLazyRepaint) {
renderer->repaint();
renderer->setRenderBoxNeedsLazyRepaint(false);
}
m_renderersNeedingLazyRepaint.clear();
}
RenderBox::LogicalExtentComputedValues RenderView::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit) const
{
return { !shouldUsePrintingLayout() ? LayoutUnit(viewLogicalHeight()) : logicalHeight, 0_lu, ComputedMarginValues() };
}
void RenderView::updateLogicalWidth()
{
setLogicalWidth(shouldUsePrintingLayout() ? m_pageLogicalSize->width() : LayoutUnit(viewLogicalWidth()));
}
LayoutUnit RenderView::availableLogicalHeight(AvailableLogicalHeightType) const
{
// Make sure block progression pagination for percentages uses the column extent and
// not the view's extent. See https://bugs.webkit.org/show_bug.cgi?id=135204.
if (multiColumnFlow() && multiColumnFlow()->firstMultiColumnSet())
return multiColumnFlow()->firstMultiColumnSet()->computedColumnHeight();
#if PLATFORM(IOS_FAMILY)
// Workaround for <rdar://problem/7166808>.
if (document().isPluginDocument() && frameView().useFixedLayout())
return frameView().fixedLayoutSize().height();
#endif
return isHorizontalWritingMode() ? frameView().layoutSize().height() : frameView().layoutSize().width();
}
bool RenderView::isChildAllowed(const RenderObject& child, const RenderStyle&) const
{
return child.isBox();
}
void RenderView::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
if (!document().paginated())
m_pageLogicalSize = { };
if (shouldUsePrintingLayout()) {
if (!m_pageLogicalSize)
m_pageLogicalSize = LayoutSize(logicalWidth(), 0_lu);
m_minPreferredLogicalWidth = m_pageLogicalSize->width();
m_maxPreferredLogicalWidth = m_minPreferredLogicalWidth;
}
// Use calcWidth/Height to get the new width/height, since this will take the full page zoom factor into account.
bool relayoutChildren = !shouldUsePrintingLayout() && (width() != viewWidth() || height() != viewHeight());
if (relayoutChildren) {
setChildNeedsLayout(MarkOnlyThis);
for (auto& box : childrenOfType<RenderBox>(*this)) {
if (box.hasRelativeLogicalHeight()
|| box.style().logicalHeight().isPercentOrCalculated()
|| box.style().logicalMinHeight().isPercentOrCalculated()
|| box.style().logicalMaxHeight().isPercentOrCalculated()
|| box.isSVGRootOrLegacySVGRoot()
)
box.setChildNeedsLayout(MarkOnlyThis);
}
}
ASSERT(!frameView().layoutContext().layoutState());
if (!needsLayout())
return;
LayoutStateMaintainer statePusher(*this, { }, false, valueOrDefault(m_pageLogicalSize).height(), m_pageLogicalHeightChanged);
m_pageLogicalHeightChanged = false;
RenderBlockFlow::layout();
#ifndef NDEBUG
frameView().layoutContext().checkLayoutState();
#endif
clearNeedsLayout();
}
LayoutUnit RenderView::pageOrViewLogicalHeight() const
{
if (shouldUsePrintingLayout())
return m_pageLogicalSize->height();
if (multiColumnFlow() && !style().hasInlineColumnAxis()) {
if (int pageLength = frameView().pagination().pageLength)
return pageLength;
}
return viewLogicalHeight();
}
LayoutUnit RenderView::clientLogicalWidthForFixedPosition() const
{
// FIXME: If the FrameView's fixedVisibleContentRect() is not empty, perhaps it should be consulted here too?
if (frameView().fixedElementsLayoutRelativeToFrame())
return LayoutUnit((isHorizontalWritingMode() ? frameView().visibleWidth() : frameView().visibleHeight()) / frameView().frame().frameScaleFactor());
#if PLATFORM(IOS_FAMILY)
if (frameView().useCustomFixedPositionLayoutRect())
return isHorizontalWritingMode() ? frameView().customFixedPositionLayoutRect().width() : frameView().customFixedPositionLayoutRect().height();
#endif
if (settings().visualViewportEnabled())
return isHorizontalWritingMode() ? frameView().layoutViewportRect().width() : frameView().layoutViewportRect().height();
return clientLogicalWidth();
}
LayoutUnit RenderView::clientLogicalHeightForFixedPosition() const
{
// FIXME: If the FrameView's fixedVisibleContentRect() is not empty, perhaps it should be consulted here too?
if (frameView().fixedElementsLayoutRelativeToFrame())
return LayoutUnit((isHorizontalWritingMode() ? frameView().visibleHeight() : frameView().visibleWidth()) / frameView().frame().frameScaleFactor());
#if PLATFORM(IOS_FAMILY)
if (frameView().useCustomFixedPositionLayoutRect())
return isHorizontalWritingMode() ? frameView().customFixedPositionLayoutRect().height() : frameView().customFixedPositionLayoutRect().width();
#endif
if (settings().visualViewportEnabled())
return isHorizontalWritingMode() ? frameView().layoutViewportRect().height() : frameView().layoutViewportRect().width();
return clientLogicalHeight();
}
void RenderView::mapLocalToContainer(const RenderLayerModelObject* ancestorContainer, TransformState& transformState, OptionSet<MapCoordinatesMode> mode, bool* wasFixed) const
{
// If a container was specified, and was not nullptr or the RenderView,
// then we should have found it by now.
ASSERT_ARG(ancestorContainer, !ancestorContainer || ancestorContainer == this);
ASSERT_UNUSED(wasFixed, !wasFixed || *wasFixed == (mode.contains(IsFixed)));
if (mode.contains(IsFixed))
transformState.move(toLayoutSize(frameView().scrollPositionRespectingCustomFixedPosition()));
if (!ancestorContainer && mode.contains(UseTransforms) && shouldUseTransformFromContainer(nullptr)) {
TransformationMatrix t;
getTransformFromContainer(nullptr, LayoutSize(), t);
transformState.applyTransform(t);
}
}
const RenderObject* RenderView::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const
{
// If a container was specified, and was not nullptr or the RenderView,
// then we should have found it by now.
ASSERT_ARG(ancestorToStopAt, !ancestorToStopAt || ancestorToStopAt == this);
LayoutPoint scrollPosition = frameView().scrollPositionRespectingCustomFixedPosition();
if (!ancestorToStopAt && shouldUseTransformFromContainer(nullptr)) {
TransformationMatrix t;
getTransformFromContainer(nullptr, LayoutSize(), t);
geometryMap.pushView(this, toLayoutSize(scrollPosition), &t);
} else
geometryMap.pushView(this, toLayoutSize(scrollPosition));
return nullptr;
}
void RenderView::mapAbsoluteToLocalPoint(OptionSet<MapCoordinatesMode> mode, TransformState& transformState) const
{
if (mode & UseTransforms && shouldUseTransformFromContainer(nullptr)) {
TransformationMatrix t;
getTransformFromContainer(nullptr, LayoutSize(), t);
transformState.applyTransform(t);
}
if (mode & IsFixed)
transformState.move(toLayoutSize(frameView().scrollPositionRespectingCustomFixedPosition()));
}
bool RenderView::requiresColumns(int) const
{
return frameView().pagination().mode != Pagination::Unpaginated;
}
void RenderView::computeColumnCountAndWidth()
{
int columnWidth = contentLogicalWidth();
if (style().hasInlineColumnAxis()) {
if (int pageLength = frameView().pagination().pageLength)
columnWidth = pageLength;
}
setComputedColumnCountAndWidth(1, columnWidth);
}
void RenderView::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
// If we ever require layout but receive a paint anyway, something has gone horribly wrong.
ASSERT(!needsLayout());
// RenderViews should never be called to paint with an offset not on device pixels.
ASSERT(LayoutPoint(IntPoint(paintOffset.x(), paintOffset.y())) == paintOffset);
// This avoids painting garbage between columns if there is a column gap.
if (frameView().pagination().mode != Pagination::Unpaginated && paintInfo.shouldPaintWithinRoot(*this))
paintInfo.context().fillRect(paintInfo.rect, frameView().baseBackgroundColor());
paintObject(paintInfo, paintOffset);
}
RenderElement* RenderView::rendererForRootBackground() const
{
auto* firstChild = this->firstChild();
if (!firstChild)
return nullptr;
ASSERT(is<RenderElement>(*firstChild));
auto& documentRenderer = downcast<RenderElement>(*firstChild);
if (documentRenderer.hasBackground())
return &documentRenderer;
// We propagate the background only for HTML content.
if (!is<HTMLHtmlElement>(documentRenderer.element()))
return &documentRenderer;
if (documentRenderer.shouldApplyAnyContainment())
return nullptr;
if (auto* body = document().body()) {
if (auto* renderer = body->renderer()) {
if (!renderer->shouldApplyAnyContainment())
return renderer;
}
}
return &documentRenderer;
}
static inline bool rendererObscuresBackground(const RenderElement& rootElement)
{
auto& style = rootElement.style();
if (style.visibility() != Visibility::Visible || style.opacity() != 1 || style.hasTransform())
return false;
if (style.hasBorderRadius())
return false;
if (rootElement.isComposited())
return false;
auto* rendererForBackground = rootElement.view().rendererForRootBackground();
if (!rendererForBackground)
return false;
if (rendererForBackground->style().backgroundClip() == FillBox::Text)
return false;
return true;
}
void RenderView::paintBoxDecorations(PaintInfo& paintInfo, const LayoutPoint&)
{
if (!paintInfo.shouldPaintWithinRoot(*this))
return;
// Check to see if we are enclosed by a layer that requires complex painting rules. If so, we cannot blit
// when scrolling, and we need to use slow repaints. Examples of layers that require this are transparent layers,
// layers with reflections, or transformed layers.
// FIXME: This needs to be dynamic. We should be able to go back to blitting if we ever stop being inside
// a transform, transparency layer, etc.
for (HTMLFrameOwnerElement* element = document().ownerElement(); element && element->renderer(); element = element->document().ownerElement()) {
RenderLayer* layer = element->renderer()->enclosingLayer();
if (layer->cannotBlitToWindow()) {
frameView().setCannotBlitToWindow();
break;
}
if (auto* compositingLayer = layer->enclosingCompositingLayerForRepaint().layer) {
if (!compositingLayer->backing()->paintsIntoWindow()) {
frameView().setCannotBlitToWindow();
break;
}
}
}
if (document().ownerElement())
return;
if (paintInfo.skipRootBackground())
return;
bool rootFillsViewport = false;
bool rootObscuresBackground = false;
Element* documentElement = document().documentElement();
if (RenderElement* rootRenderer = documentElement ? documentElement->renderer() : nullptr) {
// The document element's renderer is currently forced to be a block, but may not always be.
auto* rootBox = dynamicDowncast<RenderBox>(*rootRenderer);
rootFillsViewport = rootBox && !rootBox->x() && !rootBox->y() && rootBox->width() >= width() && rootBox->height() >= height();
rootObscuresBackground = rendererObscuresBackground(*rootRenderer);
}
compositor().rootBackgroundColorOrTransparencyChanged();
Page* page = document().page();
float pageScaleFactor = page ? page->pageScaleFactor() : 1;
// If painting will entirely fill the view, no need to fill the background.
if (rootFillsViewport && rootObscuresBackground && pageScaleFactor >= 1)
return;
// This code typically only executes if the root element's visibility has been set to hidden,
// if there is a transform on the <html>, or if there is a page scale factor less than 1.
// Only fill with a background color (typically white) if we're the root document,
// since iframes/frames with no background in the child document should show the parent's background.
// We use the base background color unless the backgroundShouldExtendBeyondPage setting is set,
// in which case we use the document's background color.
if (frameView().isTransparent()) // FIXME: This needs to be dynamic. We should be able to go back to blitting if we ever stop being transparent.
frameView().setCannotBlitToWindow(); // The parent must show behind the child.
else {
const Color& documentBackgroundColor = frameView().documentBackgroundColor();
const Color& backgroundColor = (settings().backgroundShouldExtendBeyondPage() && documentBackgroundColor.isValid()) ? documentBackgroundColor : frameView().baseBackgroundColor();
if (backgroundColor.isVisible()) {
CompositeOperator previousOperator = paintInfo.context().compositeOperation();
paintInfo.context().setCompositeOperation(CompositeOperator::Copy);
paintInfo.context().fillRect(paintInfo.rect, backgroundColor);
paintInfo.context().setCompositeOperation(previousOperator);
} else
paintInfo.context().clearRect(paintInfo.rect);
}
}
bool RenderView::shouldRepaint(const LayoutRect& rect) const
{
return !printing() && !rect.isEmpty();
}
void RenderView::repaintRootContents()
{
if (layer()->isComposited()) {
layer()->setBackingNeedsRepaint(GraphicsLayer::DoNotClipToLayer);
return;
}
// Always use layoutOverflowRect() to fix rdar://problem/27182267.
// This should be cleaned up via webkit.org/b/159913 and webkit.org/b/159914.
auto* repaintContainer = containerForRepaint().renderer;
repaintUsingContainer(repaintContainer, computeRectForRepaint(layoutOverflowRect(), repaintContainer));
}
void RenderView::repaintViewRectangle(const LayoutRect& repaintRect) const
{
if (!shouldRepaint(repaintRect))
return;
// FIXME: enclosingRect is needed as long as we integral snap ScrollView/FrameView/RenderWidget size/position.
IntRect enclosingRect = enclosingIntRect(repaintRect);
if (auto ownerElement = document().ownerElement()) {
RenderBox* ownerBox = ownerElement->renderBox();
if (!ownerBox)
return;
LayoutRect viewRect = this->viewRect();
#if PLATFORM(IOS_FAMILY)
// Don't clip using the visible rect since clipping is handled at a higher level on iPhone.
LayoutRect adjustedRect = enclosingRect;
#else
LayoutRect adjustedRect = intersection(enclosingRect, viewRect);
#endif
adjustedRect.moveBy(-viewRect.location());
adjustedRect.moveBy(ownerBox->contentBoxRect().location());
// A dirty rect in an iframe is relative to the contents of that iframe.
// When we traverse between parent frames and child frames, we need to make sure
// that the coordinate system is mapped appropriately between the iframe's contents
// and the Renderer that contains the iframe. This transformation must account for a
// left scrollbar (if one exists).
FrameView& frameView = this->frameView();
if (frameView.shouldPlaceVerticalScrollbarOnLeft() && frameView.verticalScrollbar())
adjustedRect.move(LayoutSize(frameView.verticalScrollbar()->occupiedWidth(), 0));
ownerBox->repaintRectangle(adjustedRect);
return;
}
frameView().addTrackedRepaintRect(snapRectToDevicePixels(repaintRect, document().deviceScaleFactor()));
if (!m_accumulatedRepaintRegion) {
frameView().repaintContentRectangle(enclosingRect);
return;
}
m_accumulatedRepaintRegion->unite(enclosingRect);
// Region will get slow if it gets too complex. Merge all rects so far to bounds if this happens.
// FIXME: Maybe there should be a region type that does this automatically.
static const unsigned maximumRepaintRegionGridSize = 16 * 16;
if (m_accumulatedRepaintRegion->gridSize() > maximumRepaintRegionGridSize)
m_accumulatedRepaintRegion = makeUnique<Region>(m_accumulatedRepaintRegion->bounds());
}
void RenderView::flushAccumulatedRepaintRegion() const
{
ASSERT(!document().ownerElement());
ASSERT(m_accumulatedRepaintRegion);
auto repaintRects = m_accumulatedRepaintRegion->rects();
for (auto& rect : repaintRects)
frameView().repaintContentRectangle(rect);
m_accumulatedRepaintRegion = nullptr;
}
void RenderView::repaintViewAndCompositedLayers()
{
repaintRootContents();
RenderLayerCompositor& compositor = this->compositor();
if (compositor.usesCompositing())
compositor.repaintCompositedLayers();
}
std::optional<LayoutRect> RenderView::computeVisibleRectInContainer(const LayoutRect& rect, const RenderLayerModelObject* container, VisibleRectContext context) const
{
// If a container was specified, and was not nullptr or the RenderView,
// then we should have found it by now.
ASSERT_ARG(container, !container || container == this);
if (printing())
return rect;
LayoutRect adjustedRect = rect;
if (style().isFlippedBlocksWritingMode()) {
// We have to flip by hand since the view's logical height has not been determined. We
// can use the viewport width and height.
if (style().isHorizontalWritingMode())
adjustedRect.setY(viewHeight() - adjustedRect.maxY());
else
adjustedRect.setX(viewWidth() - adjustedRect.maxX());
}
if (context.hasPositionFixedDescendant)
adjustedRect.moveBy(frameView().scrollPositionRespectingCustomFixedPosition());
// Apply our transform if we have one (because of full page zooming).
if (!container && layer() && layer()->transform())
adjustedRect = LayoutRect(layer()->transform()->mapRect(snapRectToDevicePixels(adjustedRect, document().deviceScaleFactor())));
return adjustedRect;
}
bool RenderView::isScrollableOrRubberbandableBox() const
{
// The main frame might be allowed to rubber-band even if there is no content to scroll to. This is unique to
// the main frame; subframes and overflow areas have to have content that can be scrolled to in order to rubber-band.
FrameView::Scrollability defineScrollable = frame().ownerElement() ? FrameView::Scrollability::Scrollable : FrameView::Scrollability::ScrollableOrRubberbandable;
return frameView().isScrollable(defineScrollable);
}
void RenderView::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
{
rects.append(snappedIntRect(accumulatedOffset, layer()->size()));
}
void RenderView::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
{
if (wasFixed)
*wasFixed = false;
quads.append(FloatRect(FloatPoint(), layer()->size()));
}
bool RenderView::printing() const
{
return document().printing();
}
bool RenderView::shouldUsePrintingLayout() const
{
if (!printing())
return false;
return frameView().frame().shouldUsePrintingLayout();
}
LayoutRect RenderView::viewRect() const
{
if (shouldUsePrintingLayout())
return LayoutRect(LayoutPoint(), size());
return frameView().visibleContentRect(ScrollableArea::LegacyIOSDocumentVisibleRect);
}
IntRect RenderView::unscaledDocumentRect() const
{
LayoutRect overflowRect(layoutOverflowRect());
flipForWritingMode(overflowRect);
return snappedIntRect(overflowRect);
}
bool RenderView::rootBackgroundIsEntirelyFixed() const
{
if (auto* rootBackgroundRenderer = rendererForRootBackground())
return rootBackgroundRenderer->style().hasEntirelyFixedBackground();
return false;
}
bool RenderView::shouldPaintBaseBackground() const
{
auto& document = this->document();
auto& frameView = this->frameView();
auto* ownerElement = document.ownerElement();
// Fill with a base color if we're the root document.
if (!ownerElement)
return !frameView.isTransparent();
if (ownerElement->hasTagName(HTMLNames::frameTag))
return true;
// Locate the <body> element using the DOM. This is easier than trying
// to crawl around a render tree with potential :before/:after content and
// anonymous blocks created by inline <body> tags etc. We can locate the <body>
// render object very easily via the DOM.
auto* body = document.bodyOrFrameset();
// SVG documents and XML documents with SVG root nodes are transparent.
if (!body)
return !document.hasSVGRootNode();
// Can't scroll a frameset document anyway.
if (is<HTMLFrameSetElement>(*body))
return true;
auto* frameRenderer = ownerElement->renderer();
if (!frameRenderer)
return false;
// iframes should fill with a base color if the used color scheme of the
// element and the used color scheme of the embedded document’s root
// element do not match.
if (frameView.useDarkAppearance() != frameRenderer->useDarkAppearance())
return !frameView.isTransparent();
return false;
}
LayoutRect RenderView::unextendedBackgroundRect() const
{
// FIXME: What is this? Need to patch for new columns?
return unscaledDocumentRect();
}
LayoutRect RenderView::backgroundRect() const
{
// FIXME: New columns care about this?
if (frameView().hasExtendedBackgroundRectForPainting())
return frameView().extendedBackgroundRectForPainting();
return unextendedBackgroundRect();
}
IntRect RenderView::documentRect() const
{
FloatRect overflowRect(unscaledDocumentRect());
if (hasTransform())
overflowRect = layer()->currentTransform().mapRect(overflowRect);
return IntRect(overflowRect);
}
int RenderView::viewHeight() const
{
int height = 0;
if (!shouldUsePrintingLayout()) {
height = frameView().layoutHeight();
height = frameView().useFixedLayout() ? ceilf(style().effectiveZoom() * float(height)) : height;
}
return height;
}
int RenderView::viewWidth() const
{
int width = 0;
if (!shouldUsePrintingLayout()) {
width = frameView().layoutWidth();
width = frameView().useFixedLayout() ? ceilf(style().effectiveZoom() * float(width)) : width;
}
return width;
}
int RenderView::viewLogicalHeight() const
{
int height = style().isHorizontalWritingMode() ? viewHeight() : viewWidth();
return height;
}
void RenderView::setPageLogicalSize(LayoutSize size)
{
if (!m_pageLogicalSize || m_pageLogicalSize->height() != size.height())
m_pageLogicalHeightChanged = true;
m_pageLogicalSize = size;
}
float RenderView::zoomFactor() const
{
return frameView().frame().pageZoomFactor();
}
FloatSize RenderView::sizeForCSSSmallViewportUnits() const
{
return frameView().sizeForCSSSmallViewportUnits();
}
FloatSize RenderView::sizeForCSSLargeViewportUnits() const
{
return frameView().sizeForCSSLargeViewportUnits();
}
FloatSize RenderView::sizeForCSSDynamicViewportUnits() const
{
return frameView().sizeForCSSDynamicViewportUnits();
}
FloatSize RenderView::sizeForCSSDefaultViewportUnits() const
{
return frameView().sizeForCSSDefaultViewportUnits();
}
Node* RenderView::nodeForHitTest() const
{
return document().documentElement();
}
void RenderView::updateHitTestResult(HitTestResult& result, const LayoutPoint& point)
{
if (result.innerNode())
return;
if (multiColumnFlow() && multiColumnFlow()->firstMultiColumnSet())
return multiColumnFlow()->firstMultiColumnSet()->updateHitTestResult(result, point);
if (auto* node = nodeForHitTest()) {
result.setInnerNode(node);
if (!result.innerNonSharedNode())
result.setInnerNonSharedNode(node);
LayoutPoint adjustedPoint = point;
offsetForContents(adjustedPoint);
result.setLocalPoint(adjustedPoint);
}
}
// FIXME: This function is obsolete and only used by embedded WebViews inside AppKit NSViews.
// Do not add callers of this function!
// The idea here is to take into account what object is moving the pagination point, and
// thus choose the best place to chop it.
void RenderView::setBestTruncatedAt(int y, RenderBoxModelObject* forRenderer, bool forcedBreak)
{
// Nobody else can set a page break once we have a forced break.
if (m_legacyPrinting.m_forcedPageBreak)
return;
// Forced breaks always win over unforced breaks.
if (forcedBreak) {
m_legacyPrinting.m_forcedPageBreak = true;
m_legacyPrinting.m_bestTruncatedAt = y;
return;
}
// Prefer the widest object that tries to move the pagination point
LayoutRect boundingBox = forRenderer->borderBoundingBox();
if (boundingBox.width() > m_legacyPrinting.m_truncatorWidth) {
m_legacyPrinting.m_truncatorWidth = boundingBox.width();
m_legacyPrinting.m_bestTruncatedAt = y;
}
}
bool RenderView::usesCompositing() const
{
return m_compositor && m_compositor->usesCompositing();
}
RenderLayerCompositor& RenderView::compositor()
{
if (!m_compositor)
m_compositor = makeUnique<RenderLayerCompositor>(*this);
return *m_compositor;
}
void RenderView::setIsInWindow(bool isInWindow)
{
if (m_compositor)
m_compositor->setIsInWindow(isInWindow);
}
ImageQualityController& RenderView::imageQualityController()
{
if (!m_imageQualityController)
m_imageQualityController = makeUnique<ImageQualityController>(*this);
return *m_imageQualityController;
}
void RenderView::registerForVisibleInViewportCallback(RenderElement& renderer)
{
ASSERT(!m_visibleInViewportRenderers.contains(&renderer));
m_visibleInViewportRenderers.add(&renderer);
}
void RenderView::unregisterForVisibleInViewportCallback(RenderElement& renderer)
{
ASSERT(m_visibleInViewportRenderers.contains(&renderer));
m_visibleInViewportRenderers.remove(&renderer);
}
void RenderView::updateVisibleViewportRect(const IntRect& visibleRect)
{
resumePausedImageAnimationsIfNeeded(visibleRect);
for (auto* renderer : m_visibleInViewportRenderers) {
auto state = visibleRect.intersects(enclosingIntRect(renderer->absoluteClippedOverflowRectForRepaint())) ? VisibleInViewportState::Yes : VisibleInViewportState::No;
renderer->setVisibleInViewportState(state);
}
}
void RenderView::addRendererWithPausedImageAnimations(RenderElement& renderer, CachedImage& image)
{
ASSERT(!renderer.hasPausedImageAnimations() || m_renderersWithPausedImageAnimation.contains(&renderer));
renderer.setHasPausedImageAnimations(true);
auto& images = m_renderersWithPausedImageAnimation.ensure(&renderer, [] {
return Vector<CachedImage*>();
}).iterator->value;
if (!images.contains(&image))
images.append(&image);
}
void RenderView::removeRendererWithPausedImageAnimations(RenderElement& renderer)
{
ASSERT(renderer.hasPausedImageAnimations());
ASSERT(m_renderersWithPausedImageAnimation.contains(&renderer));
renderer.setHasPausedImageAnimations(false);
m_renderersWithPausedImageAnimation.remove(&renderer);
}
void RenderView::removeRendererWithPausedImageAnimations(RenderElement& renderer, CachedImage& image)
{
ASSERT(renderer.hasPausedImageAnimations());
auto it = m_renderersWithPausedImageAnimation.find(&renderer);
ASSERT(it != m_renderersWithPausedImageAnimation.end());
auto& images = it->value;
if (!images.contains(&image))
return;
if (images.size() == 1)
removeRendererWithPausedImageAnimations(renderer);
else
images.removeFirst(&image);
}
void RenderView::resumePausedImageAnimationsIfNeeded(const IntRect& visibleRect)
{
Vector<std::pair<RenderElement*, CachedImage*>, 10> toRemove;
for (auto& it : m_renderersWithPausedImageAnimation) {
auto* renderer = it.key;
for (auto* image : it.value) {
if (renderer->repaintForPausedImageAnimationsIfNeeded(visibleRect, *image))
toRemove.append(std::make_pair(renderer, image));
}
}
for (auto& pair : toRemove)
removeRendererWithPausedImageAnimations(*pair.first, *pair.second);
}
RenderView::RepaintRegionAccumulator::RepaintRegionAccumulator(RenderView* view)
{
if (!view)
return;
auto* rootRenderView = view->document().topDocument().renderView();
if (!rootRenderView)
return;
m_wasAccumulatingRepaintRegion = !!rootRenderView->m_accumulatedRepaintRegion;
if (!m_wasAccumulatingRepaintRegion)
rootRenderView->m_accumulatedRepaintRegion = makeUnique<Region>();
m_rootView = *rootRenderView;
}
RenderView::RepaintRegionAccumulator::~RepaintRegionAccumulator()
{
if (m_wasAccumulatingRepaintRegion)
return;
if (!m_rootView)
return;
m_rootView.get()->flushAccumulatedRepaintRegion();
}
unsigned RenderView::pageNumberForBlockProgressionOffset(int offset) const
{
int columnNumber = 0;
const Pagination& pagination = page().pagination();
if (pagination.mode == Pagination::Unpaginated)
return columnNumber;
bool progressionIsInline = false;
bool progressionIsReversed = false;
if (multiColumnFlow()) {
progressionIsInline = multiColumnFlow()->progressionIsInline();
progressionIsReversed = multiColumnFlow()->progressionIsReversed();
} else
return columnNumber;
if (!progressionIsInline) {
if (!progressionIsReversed)
columnNumber = (pagination.pageLength + pagination.gap - offset) / (pagination.pageLength + pagination.gap);
else
columnNumber = offset / (pagination.pageLength + pagination.gap);
}
return columnNumber;
}
unsigned RenderView::pageCount() const
{
const Pagination& pagination = page().pagination();
if (pagination.mode == Pagination::Unpaginated)
return 0;
if (multiColumnFlow() && multiColumnFlow()->firstMultiColumnSet())
return multiColumnFlow()->firstMultiColumnSet()->columnCount();
return 0;
}
void RenderView::layerChildrenChangedDuringStyleChange(RenderLayer& layer)
{
if (!m_styleChangeLayerMutationRoot) {
m_styleChangeLayerMutationRoot = layer;
return;
}
RenderLayer* commonAncestor = m_styleChangeLayerMutationRoot->commonAncestorWithLayer(layer);
m_styleChangeLayerMutationRoot = commonAncestor;
}
RenderLayer* RenderView::takeStyleChangeLayerTreeMutationRoot()
{
auto* result = m_styleChangeLayerMutationRoot.get();
m_styleChangeLayerMutationRoot.clear();
return result;
}
void RenderView::registerBoxWithScrollSnapPositions(const RenderBox& box)
{
m_boxesWithScrollSnapPositions.add(&box);
}
void RenderView::unregisterBoxWithScrollSnapPositions(const RenderBox& box)
{
m_boxesWithScrollSnapPositions.remove(&box);
}
void RenderView::registerContainerQueryBox(const RenderBox& box)
{
m_containerQueryBoxes.add(box);
}
void RenderView::unregisterContainerQueryBox(const RenderBox& box)
{
m_containerQueryBoxes.remove(box);
}
} // namespace WebCore