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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
* (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
* Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2010, 2012 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 "RenderLayerModelObject.h"
#include "RenderLayer.h"
#include "RenderLayerBacking.h"
#include "RenderLayerCompositor.h"
#include "RenderView.h"
#include "Settings.h"
#include "StyleScrollSnapPoints.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderLayerModelObject);
bool RenderLayerModelObject::s_wasFloating = false;
bool RenderLayerModelObject::s_hadLayer = false;
bool RenderLayerModelObject::s_hadTransform = false;
bool RenderLayerModelObject::s_layerWasSelfPainting = false;
typedef WTF::HashMap<const RenderLayerModelObject*, RepaintLayoutRects> RepaintLayoutRectsMap;
static RepaintLayoutRectsMap* gRepaintLayoutRectsMap = nullptr;
RepaintLayoutRects::RepaintLayoutRects(const RenderLayerModelObject& renderer, const RenderLayerModelObject* repaintContainer, const RenderGeometryMap* geometryMap)
: m_repaintRect(renderer.clippedOverflowRectForRepaint(repaintContainer))
, m_outlineBox(renderer.outlineBoundsForRepaint(repaintContainer, geometryMap))
{
}
RenderLayerModelObject::RenderLayerModelObject(Element& element, RenderStyle&& style, BaseTypeFlags baseTypeFlags)
: RenderElement(element, WTFMove(style), baseTypeFlags | RenderLayerModelObjectFlag)
{
}
RenderLayerModelObject::RenderLayerModelObject(Document& document, RenderStyle&& style, BaseTypeFlags baseTypeFlags)
: RenderElement(document, WTFMove(style), baseTypeFlags | RenderLayerModelObjectFlag)
{
}
RenderLayerModelObject::~RenderLayerModelObject()
{
// Do not add any code here. Add it to willBeDestroyed() instead.
}
void RenderLayerModelObject::willBeDestroyed()
{
if (isPositioned()) {
if (style().hasViewportConstrainedPosition())
view().frameView().removeViewportConstrainedObject(*this);
}
if (hasLayer()) {
setHasLayer(false);
destroyLayer();
}
RenderElement::willBeDestroyed();
clearRepaintLayoutRects();
}
void RenderLayerModelObject::destroyLayer()
{
ASSERT(!hasLayer());
ASSERT(m_layer);
if (m_layer->isSelfPaintingLayer())
clearRepaintLayoutRects();
m_layer = nullptr;
}
void RenderLayerModelObject::createLayer()
{
ASSERT(!m_layer);
m_layer = makeUnique<RenderLayer>(*this);
setHasLayer(true);
m_layer->insertOnlyThisLayer(RenderLayer::LayerChangeTiming::StyleChange);
}
bool RenderLayerModelObject::hasSelfPaintingLayer() const
{
return m_layer && m_layer->isSelfPaintingLayer();
}
void RenderLayerModelObject::styleWillChange(StyleDifference diff, const RenderStyle& newStyle)
{
s_wasFloating = isFloating();
s_hadLayer = hasLayer();
s_hadTransform = hasTransform();
if (s_hadLayer)
s_layerWasSelfPainting = layer()->isSelfPaintingLayer();
// If our z-index changes value or our visibility changes,
// we need to dirty our stacking context's z-order list.
const RenderStyle* oldStyle = hasInitializedStyle() ? &style() : nullptr;
if (oldStyle) {
if (parent()) {
// Do a repaint with the old style first, e.g., for example if we go from
// having an outline to not having an outline.
if (diff == StyleDifference::RepaintLayer) {
layer()->repaintIncludingDescendants();
if (!(oldStyle->clip() == newStyle.clip()))
layer()->clearClipRectsIncludingDescendants();
} else if (diff == StyleDifference::Repaint || newStyle.outlineSize() < oldStyle->outlineSize())
repaint();
}
if (diff == StyleDifference::Layout || diff == StyleDifference::SimplifiedLayout) {
// When a layout hint happens, we do a repaint of the layer, since the layer could end up being destroyed.
if (hasLayer()) {
if (oldStyle->position() != newStyle.position()
|| oldStyle->usedZIndex() != newStyle.usedZIndex()
|| oldStyle->hasAutoUsedZIndex() != newStyle.hasAutoUsedZIndex()
|| !(oldStyle->clip() == newStyle.clip())
|| oldStyle->hasClip() != newStyle.hasClip()
|| oldStyle->opacity() != newStyle.opacity()
|| oldStyle->transform() != newStyle.transform()
|| oldStyle->filter() != newStyle.filter()
)
layer()->repaintIncludingDescendants();
} else if (newStyle.hasTransform() || newStyle.opacity() < 1 || newStyle.hasFilter() || newStyle.hasBackdropFilter()) {
// If we don't have a layer yet, but we are going to get one because of transform or opacity,
// then we need to repaint the old position of the object.
repaint();
}
}
}
RenderElement::styleWillChange(diff, newStyle);
}
#if ENABLE(CSS_SCROLL_SNAP)
static bool scrollSnapContainerRequiresUpdateForStyleUpdate(const RenderStyle& oldStyle, const RenderStyle& newStyle)
{
return oldStyle.scrollSnapPort() != newStyle.scrollSnapPort();
}
#endif
void RenderLayerModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderElement::styleDidChange(diff, oldStyle);
updateFromStyle();
if (requiresLayer()) {
if (!layer() && layerCreationAllowedForSubtree()) {
if (s_wasFloating && isFloating())
setChildNeedsLayout();
createLayer();
if (parent() && !needsLayout() && containingBlock())
layer()->setRepaintStatus(NeedsFullRepaint);
}
} else if (layer() && layer()->parent()) {
#if ENABLE(CSS_COMPOSITING)
if (oldStyle->hasBlendMode())
layer()->willRemoveChildWithBlendMode();
#endif
setHasTransformRelatedProperty(false); // All transform-related properties force layers, so we know we don't have one or the object doesn't support them.
setHasReflection(false);
// Repaint the about to be destroyed self-painting layer when style change also triggers repaint.
if (layer()->isSelfPaintingLayer() && layer()->repaintStatus() == NeedsFullRepaint && hasRepaintLayoutRects())
repaintUsingContainer(containerForRepaint(), repaintLayoutRects().m_repaintRect);
layer()->removeOnlyThisLayer(RenderLayer::LayerChangeTiming::StyleChange); // calls destroyLayer() which clears m_layer
if (s_wasFloating && isFloating())
setChildNeedsLayout();
if (s_hadTransform)
setNeedsLayoutAndPrefWidthsRecalc();
}
if (layer()) {
layer()->styleChanged(diff, oldStyle);
if (s_hadLayer && layer()->isSelfPaintingLayer() != s_layerWasSelfPainting)
setChildNeedsLayout();
}
bool newStyleIsViewportConstrained = style().hasViewportConstrainedPosition();
bool oldStyleIsViewportConstrained = oldStyle && oldStyle->hasViewportConstrainedPosition();
if (newStyleIsViewportConstrained != oldStyleIsViewportConstrained) {
if (newStyleIsViewportConstrained && layer())
view().frameView().addViewportConstrainedObject(*this);
else
view().frameView().removeViewportConstrainedObject(*this);
}
#if ENABLE(CSS_SCROLL_SNAP)
const RenderStyle& newStyle = style();
if (oldStyle && scrollSnapContainerRequiresUpdateForStyleUpdate(*oldStyle, newStyle)) {
if (RenderLayer* renderLayer = layer()) {
renderLayer->updateSnapOffsets();
renderLayer->updateScrollSnapState();
} else if (isBody() || isDocumentElementRenderer()) {
FrameView& frameView = view().frameView();
frameView.updateSnapOffsets();
frameView.updateScrollSnapState();
frameView.updateScrollingCoordinatorScrollSnapProperties();
}
}
if (oldStyle && oldStyle->scrollSnapArea() != newStyle.scrollSnapArea()) {
auto* scrollSnapBox = enclosingScrollableContainerForSnapping();
if (scrollSnapBox && scrollSnapBox->layer()) {
const RenderStyle& style = scrollSnapBox->style();
if (style.scrollSnapType().strictness != ScrollSnapStrictness::None) {
scrollSnapBox->layer()->updateSnapOffsets();
scrollSnapBox->layer()->updateScrollSnapState();
if (scrollSnapBox->isBody() || scrollSnapBox->isDocumentElementRenderer())
scrollSnapBox->view().frameView().updateScrollingCoordinatorScrollSnapProperties();
}
}
}
#endif
}
bool RenderLayerModelObject::shouldPlaceBlockDirectionScrollbarOnLeft() const
{
// RTL Scrollbars require some system support, and this system support does not exist on certain versions of OS X. iOS uses a separate mechanism.
#if PLATFORM(IOS_FAMILY)
return false;
#else
switch (settings().userInterfaceDirectionPolicy()) {
case UserInterfaceDirectionPolicy::Content:
return style().shouldPlaceBlockDirectionScrollbarOnLeft();
case UserInterfaceDirectionPolicy::System:
return settings().systemLayoutDirection() == TextDirection::RTL;
}
ASSERT_NOT_REACHED();
return style().shouldPlaceBlockDirectionScrollbarOnLeft();
#endif
}
bool RenderLayerModelObject::hasRepaintLayoutRects() const
{
return gRepaintLayoutRectsMap && gRepaintLayoutRectsMap->contains(this);
}
void RenderLayerModelObject::setRepaintLayoutRects(const RepaintLayoutRects& rects)
{
if (!gRepaintLayoutRectsMap)
gRepaintLayoutRectsMap = new RepaintLayoutRectsMap();
gRepaintLayoutRectsMap->set(this, rects);
}
void RenderLayerModelObject::clearRepaintLayoutRects()
{
if (gRepaintLayoutRectsMap)
gRepaintLayoutRectsMap->remove(this);
}
RepaintLayoutRects RenderLayerModelObject::repaintLayoutRects() const
{
if (!hasRepaintLayoutRects())
return RepaintLayoutRects();
return gRepaintLayoutRectsMap->get(this);
}
void RenderLayerModelObject::computeRepaintLayoutRects(const RenderLayerModelObject* repaintContainer, const RenderGeometryMap* geometryMap)
{
if (!m_layer || !m_layer->isSelfPaintingLayer())
clearRepaintLayoutRects();
else
setRepaintLayoutRects(RepaintLayoutRects(*this, repaintContainer, geometryMap));
}
bool RenderLayerModelObject::startTransition(double timeOffset, CSSPropertyID propertyId, const RenderStyle* fromStyle, const RenderStyle* toStyle)
{
if (!layer() || !layer()->backing())
return false;
return layer()->backing()->startTransition(timeOffset, propertyId, fromStyle, toStyle);
}
void RenderLayerModelObject::transitionPaused(double timeOffset, CSSPropertyID propertyId)
{
if (!layer() || !layer()->backing())
return;
layer()->backing()->transitionPaused(timeOffset, propertyId);
}
void RenderLayerModelObject::transitionFinished(CSSPropertyID propertyId)
{
if (!layer() || !layer()->backing())
return;
layer()->backing()->transitionFinished(propertyId);
}
bool RenderLayerModelObject::startAnimation(double timeOffset, const Animation& animation, const KeyframeList& keyframes)
{
if (!layer() || !layer()->backing())
return false;
return layer()->backing()->startAnimation(timeOffset, animation, keyframes);
}
void RenderLayerModelObject::animationPaused(double timeOffset, const String& name)
{
if (!layer() || !layer()->backing())
return;
layer()->backing()->animationPaused(timeOffset, name);
}
void RenderLayerModelObject::animationFinished(const String& name)
{
if (!layer() || !layer()->backing())
return;
layer()->backing()->animationFinished(name);
}
void RenderLayerModelObject::suspendAnimations(MonotonicTime time)
{
if (!layer() || !layer()->backing())
return;
layer()->backing()->suspendAnimations(time);
}
} // namespace WebCore