| /* |
| * 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 "core/rendering/RenderLayerModelObject.h" |
| |
| #include "core/frame/LocalFrame.h" |
| #include "core/rendering/RenderLayer.h" |
| #include "core/rendering/RenderView.h" |
| #include "core/rendering/compositing/CompositedLayerMapping.h" |
| |
| namespace blink { |
| |
| bool RenderLayerModelObject::s_wasFloating = false; |
| |
| RenderLayerModelObject::RenderLayerModelObject(ContainerNode* node) |
| : RenderObject(node) |
| { |
| } |
| |
| RenderLayerModelObject::~RenderLayerModelObject() |
| { |
| // Our layer should have been destroyed and cleared by now |
| ASSERT(!hasLayer()); |
| ASSERT(!m_layer); |
| } |
| |
| void RenderLayerModelObject::destroyLayer() |
| { |
| setHasLayer(false); |
| m_layer = nullptr; |
| } |
| |
| void RenderLayerModelObject::createLayer(LayerType type) |
| { |
| ASSERT(!m_layer); |
| m_layer = adoptPtr(new RenderLayer(this, type)); |
| setHasLayer(true); |
| m_layer->insertOnlyThisLayer(); |
| } |
| |
| bool RenderLayerModelObject::hasSelfPaintingLayer() const |
| { |
| return m_layer && m_layer->isSelfPaintingLayer(); |
| } |
| |
| ScrollableArea* RenderLayerModelObject::scrollableArea() const |
| { |
| return m_layer ? m_layer->scrollableArea() : 0; |
| } |
| |
| void RenderLayerModelObject::willBeDestroyed() |
| { |
| if (isPositioned()) { |
| // Don't use this->view() because the document's renderView has been set to 0 during destruction. |
| if (LocalFrame* frame = this->frame()) { |
| if (FrameView* frameView = frame->view()) { |
| if (style()->hasViewportConstrainedPosition()) |
| frameView->removeViewportConstrainedObject(this); |
| } |
| } |
| } |
| |
| RenderObject::willBeDestroyed(); |
| |
| destroyLayer(); |
| } |
| |
| void RenderLayerModelObject::styleWillChange(StyleDifference diff, const RenderStyle& newStyle) |
| { |
| s_wasFloating = isFloating(); |
| |
| if (RenderStyle* oldStyle = style()) { |
| if (parent() && diff.needsPaintInvalidationLayer()) { |
| if (oldStyle->hasAutoClip() != newStyle.hasAutoClip() |
| || oldStyle->clip() != newStyle.clip()) |
| layer()->clipper().clearClipRectsIncludingDescendants(); |
| } |
| } |
| |
| RenderObject::styleWillChange(diff, newStyle); |
| } |
| |
| void RenderLayerModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) |
| { |
| bool hadTransform = hasTransformRelatedProperty(); |
| bool hadLayer = hasLayer(); |
| bool layerWasSelfPainting = hadLayer && layer()->isSelfPaintingLayer(); |
| |
| RenderObject::styleDidChange(diff, oldStyle); |
| updateFromStyle(); |
| |
| LayerType type = layerTypeRequired(); |
| if (type != NoLayer) { |
| if (!layer() && layerCreationAllowedForSubtree()) { |
| if (s_wasFloating && isFloating()) |
| setChildNeedsLayout(); |
| createLayer(type); |
| if (parent() && !needsLayout()) { |
| // FIXME: We should call a specialized version of this function. |
| layer()->updateLayerPositionsAfterLayout(); |
| } |
| } |
| } else if (layer() && layer()->parent()) { |
| setHasTransformRelatedProperty(false); // Either a transform wasn't specified or the object doesn't support transforms, so just null out the bit. |
| setHasReflection(false); |
| layer()->removeOnlyThisLayer(); // calls destroyLayer() which clears m_layer |
| if (s_wasFloating && isFloating()) |
| setChildNeedsLayout(); |
| if (hadTransform) |
| setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(); |
| } |
| |
| if (layer()) { |
| // FIXME: Ideally we shouldn't need this setter but we can't easily infer an overflow-only layer |
| // from the style. |
| layer()->setLayerType(type); |
| |
| layer()->styleChanged(diff, oldStyle); |
| if (hadLayer && layer()->isSelfPaintingLayer() != layerWasSelfPainting) |
| setChildNeedsLayout(); |
| } |
| |
| if (FrameView *frameView = view()->frameView()) { |
| bool newStyleIsViewportConstained = style()->hasViewportConstrainedPosition(); |
| bool oldStyleIsViewportConstrained = oldStyle && oldStyle->hasViewportConstrainedPosition(); |
| if (newStyleIsViewportConstained != oldStyleIsViewportConstrained) { |
| if (newStyleIsViewportConstained && layer()) |
| frameView->addViewportConstrainedObject(this); |
| else |
| frameView->removeViewportConstrainedObject(this); |
| } |
| } |
| } |
| |
| void RenderLayerModelObject::addLayerHitTestRects(LayerHitTestRects& rects, const RenderLayer* currentLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const |
| { |
| if (hasLayer()) { |
| if (isRenderView()) { |
| // RenderView is handled with a special fast-path, but it needs to know the current layer. |
| RenderObject::addLayerHitTestRects(rects, layer(), LayoutPoint(), LayoutRect()); |
| } else { |
| // Since a RenderObject never lives outside it's container RenderLayer, we can switch |
| // to marking entire layers instead. This may sometimes mark more than necessary (when |
| // a layer is made of disjoint objects) but in practice is a significant performance |
| // savings. |
| layer()->addLayerHitTestRects(rects); |
| } |
| } else { |
| RenderObject::addLayerHitTestRects(rects, currentLayer, layerOffset, containerRect); |
| } |
| } |
| |
| void RenderLayerModelObject::invalidateTreeIfNeeded(const PaintInvalidationState& paintInvalidationState) |
| { |
| ASSERT(!needsLayout()); |
| |
| if (!shouldCheckForPaintInvalidation(paintInvalidationState)) |
| return; |
| |
| bool establishesNewPaintInvalidationContainer = isPaintInvalidationContainer(); |
| const RenderLayerModelObject& newPaintInvalidationContainer = *adjustCompositedContainerForSpecialAncestors(establishesNewPaintInvalidationContainer ? this : &paintInvalidationState.paintInvalidationContainer()); |
| ASSERT(&newPaintInvalidationContainer == containerForPaintInvalidation()); |
| |
| PaintInvalidationReason reason = invalidatePaintIfNeeded(paintInvalidationState, newPaintInvalidationContainer); |
| clearPaintInvalidationState(paintInvalidationState); |
| |
| PaintInvalidationState childTreeWalkState(paintInvalidationState, *this, newPaintInvalidationContainer); |
| if (reason == PaintInvalidationLocationChange) |
| childTreeWalkState.setForceCheckForPaintInvalidation(); |
| invalidatePaintOfSubtreesIfNeeded(childTreeWalkState); |
| } |
| |
| void RenderLayerModelObject::setBackingNeedsPaintInvalidationInRect(const LayoutRect& r, PaintInvalidationReason invalidationReason) const |
| { |
| // https://bugs.webkit.org/show_bug.cgi?id=61159 describes an unreproducible crash here, |
| // so assert but check that the layer is composited. |
| ASSERT(compositingState() != NotComposited); |
| |
| // FIXME: generalize accessors to backing GraphicsLayers so that this code is squashing-agnostic. |
| if (layer()->groupedMapping()) { |
| LayoutRect paintInvalidationRect = r; |
| if (GraphicsLayer* squashingLayer = layer()->groupedMapping()->squashingLayer()) { |
| // Note: the subpixel accumulation of layer() does not need to be added here. It is already taken into account. |
| squashingLayer->setNeedsDisplayInRect(pixelSnappedIntRect(paintInvalidationRect), invalidationReason); |
| } |
| } else { |
| layer()->compositedLayerMapping()->setContentsNeedDisplayInRect(r, invalidationReason); |
| } |
| } |
| |
| } // namespace blink |
| |