| /* |
| * 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 "RenderLayerScrollableArea.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; |
| |
| 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(); |
| } |
| |
| void RenderLayerModelObject::destroyLayer() |
| { |
| ASSERT(!hasLayer()); |
| ASSERT(m_layer); |
| 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(); |
| |
| auto* oldStyle = hasInitializedStyle() ? &style() : nullptr; |
| if (diff == StyleDifference::RepaintLayer && parent() && oldStyle && oldStyle->clip() != newStyle.clip()) |
| layer()->clearClipRectsIncludingDescendants(); |
| RenderElement::styleWillChange(diff, newStyle); |
| } |
| |
| 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 && 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 && layer()->repaintRects()) |
| repaintUsingContainer(containerForRepaint(), layer()->repaintRects()->clippedOverflowRect); |
| |
| 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); |
| } |
| |
| const RenderStyle& newStyle = style(); |
| if (oldStyle && oldStyle->scrollPadding() != newStyle.scrollPadding()) { |
| if (isDocumentElementRenderer()) { |
| FrameView& frameView = view().frameView(); |
| frameView.updateScrollbarSteps(); |
| } else if (RenderLayer* renderLayer = layer()) |
| renderLayer->updateScrollbarSteps(); |
| } |
| |
| bool scrollMarginChanged = oldStyle && oldStyle->scrollMargin() != newStyle.scrollMargin(); |
| bool scrollAlignChanged = oldStyle && oldStyle->scrollSnapAlign() != newStyle.scrollSnapAlign(); |
| bool scrollSnapStopChanged = oldStyle && oldStyle->scrollSnapStop() != newStyle.scrollSnapStop(); |
| if (scrollMarginChanged || scrollAlignChanged || scrollSnapStopChanged) { |
| if (auto* scrollSnapBox = enclosingScrollableContainerForSnapping()) |
| scrollSnapBox->setNeedsLayout(); |
| } |
| } |
| |
| bool RenderLayerModelObject::shouldPlaceVerticalScrollbarOnLeft() 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().shouldPlaceVerticalScrollbarOnLeft(); |
| case UserInterfaceDirectionPolicy::System: |
| return settings().systemLayoutDirection() == TextDirection::RTL; |
| } |
| ASSERT_NOT_REACHED(); |
| return style().shouldPlaceVerticalScrollbarOnLeft(); |
| #endif |
| } |
| |
| std::optional<LayerRepaintRects> RenderLayerModelObject::layerRepaintRects() const |
| { |
| return hasLayer() ? layer()->repaintRects() : std::nullopt; |
| } |
| |
| 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::transformRelatedPropertyDidChange() |
| { |
| if (!layer() || !layer()->backing()) |
| return; |
| layer()->backing()->transformRelatedPropertyDidChange(); |
| } |
| |
| void RenderLayerModelObject::suspendAnimations(MonotonicTime time) |
| { |
| if (!layer() || !layer()->backing()) |
| return; |
| layer()->backing()->suspendAnimations(time); |
| } |
| |
| } // namespace WebCore |
| |