| /* |
| * 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/Frame.h" |
| #include "core/rendering/RenderLayer.h" |
| #include "core/rendering/RenderView.h" |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| bool RenderLayerModelObject::s_wasFloating = false; |
| bool RenderLayerModelObject::s_hadLayer = false; |
| bool RenderLayerModelObject::s_hadTransform = false; |
| bool RenderLayerModelObject::s_layerWasSelfPainting = 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() |
| { |
| ASSERT(!m_layer); |
| m_layer = adoptPtr(new RenderLayer(this)); |
| 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 (Frame* 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(); |
| 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. |
| RenderStyle* oldStyle = style(); |
| if (oldStyle && newStyle) { |
| 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 == StyleDifferenceRepaintLayer) { |
| layer()->repainter().repaintIncludingDescendants(); |
| if (!(oldStyle->clip() == newStyle->clip())) |
| layer()->clipper().clearClipRectsIncludingDescendants(); |
| } else if (diff == StyleDifferenceRepaint || newStyle->outlineSize() < oldStyle->outlineSize()) |
| repaint(); |
| } |
| |
| if (diff == StyleDifferenceLayout || diff == StyleDifferenceSimplifiedLayout) { |
| // When a layout hint happens, we go ahead and do a repaint of the layer, since the layer could |
| // end up being destroyed. |
| if (hasLayer()) { |
| if (oldStyle->position() != newStyle->position() |
| || oldStyle->zIndex() != newStyle->zIndex() |
| || oldStyle->hasAutoZIndex() != newStyle->hasAutoZIndex() |
| || !(oldStyle->clip() == newStyle->clip()) |
| || oldStyle->hasClip() != newStyle->hasClip() |
| || oldStyle->opacity() != newStyle->opacity() |
| || oldStyle->transform() != newStyle->transform() |
| || oldStyle->filter() != newStyle->filter() |
| ) |
| layer()->repainter().repaintIncludingDescendants(); |
| } else if (newStyle->hasTransform() || newStyle->opacity() < 1 || newStyle->hasFilter()) { |
| // 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(); |
| } |
| } |
| } |
| |
| RenderObject::styleWillChange(diff, newStyle); |
| } |
| |
| void RenderLayerModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) |
| { |
| RenderObject::styleDidChange(diff, oldStyle); |
| updateFromStyle(); |
| |
| if (requiresLayer()) { |
| if (!layer() && layerCreationAllowedForSubtree()) { |
| if (s_wasFloating && isFloating()) |
| setChildNeedsLayout(); |
| createLayer(); |
| if (parent() && !needsLayout() && containingBlock()) { |
| layer()->repainter().setRepaintStatus(NeedsFullRepaint); |
| // There is only one layer to update, it is not worth using |cachedOffset| since |
| // we are not sure the value will be used. |
| layer()->updateLayerPositions(0); |
| } |
| } |
| } else if (layer() && layer()->parent()) { |
| setHasTransform(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 (s_hadTransform) |
| setNeedsLayoutAndPrefWidthsRecalc(); |
| } |
| |
| if (layer()) { |
| layer()->styleChanged(diff, oldStyle); |
| if (s_hadLayer && layer()->isSelfPaintingLayer() != s_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); |
| } |
| } |
| |
| CompositedLayerMappingPtr RenderLayerModelObject::compositedLayerMapping() const |
| { |
| return m_layer ? m_layer->compositedLayerMapping() : 0; |
| } |
| |
| bool RenderLayerModelObject::hasCompositedLayerMapping() const |
| { |
| return m_layer ? m_layer->hasCompositedLayerMapping() : false; |
| } |
| |
| } // namespace WebCore |
| |
