Move rendering/RenderLayer* to layout/

Source/core/rendering/RenderLayerStackingNode.cpp

Index: Source/core/rendering/RenderLayerStackingNode.cpp
diff --git a/Source/core/rendering/RenderLayerStackingNode.cpp b/Source/core/rendering/RenderLayerStackingNode.cpp
deleted file mode 100644
index 41920db93e8cf686f7c230047f36d97563f21620..0000000000000000000000000000000000000000
--- a/Source/core/rendering/RenderLayerStackingNode.cpp
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
- *
- * Portions are Copyright (C) 1998 Netscape Communications Corporation.
- *
- * Other contributors:
- *   Robert O'Callahan <roc+@cs.cmu.edu>
- *   David Baron <dbaron@fas.harvard.edu>
- *   Christian Biesinger <cbiesinger@web.de>
- *   Randall Jesup <rjesup@wgate.com>
- *   Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
- *   Josh Soref <timeless@mac.com>
- *   Boris Zbarsky <bzbarsky@mit.edu>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Alternatively, the contents of this file may be used under the terms
- * of either the Mozilla Public License Version 1.1, found at
- * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
- * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
- * (the "GPL"), in which case the provisions of the MPL or the GPL are
- * applicable instead of those above.  If you wish to allow use of your
- * version of this file only under the terms of one of those two
- * licenses (the MPL or the GPL) and not to allow others to use your
- * version of this file under the LGPL, indicate your decision by
- * deletingthe provisions above and replace them with the notice and
- * other provisions required by the MPL or the GPL, as the case may be.
- * If you do not delete the provisions above, a recipient may use your
- * version of this file under any of the LGPL, the MPL or the GPL.
- */
-
-#include "config.h"
-#include "core/rendering/RenderLayerStackingNode.h"
-
-#include "core/layout/compositing/RenderLayerCompositor.h"
-#include "core/rendering/RenderLayer.h"
-#include "core/rendering/RenderView.h"
-#include "public/platform/Platform.h"
-
-namespace blink {
-
-// FIXME: This should not require RenderLayer. There is currently a cycle where
-// in order to determine if we shoulBeNormalFlowOnly() we have to ask the render
-// layer about some of its state.
-RenderLayerStackingNode::RenderLayerStackingNode(RenderLayer* layer)
-    : m_layer(layer)
-    , m_normalFlowListDirty(true)
-#if ENABLE(ASSERT)
-    , m_layerListMutationAllowed(true)
-    , m_stackingParent(0)
-#endif
-{
-    m_isNormalFlowOnly = shouldBeNormalFlowOnly();
-
-    // Non-stacking contexts should have empty z-order lists. As this is already the case,
-    // there is no need to dirty / recompute these lists.
-    m_zOrderListsDirty = isStackingContext();
-}
-
-RenderLayerStackingNode::~RenderLayerStackingNode()
-{
-#if ENABLE(ASSERT)
-    if (!renderer()->documentBeingDestroyed()) {
-        ASSERT(!isInStackingParentZOrderLists());
-        ASSERT(!isInStackingParentNormalFlowList());
-
-        updateStackingParentForZOrderLists(0);
-        updateStackingParentForNormalFlowList(0);
-    }
-#endif
-}
-
-// Helper for the sorting of layers by z-index.
-static inline bool compareZIndex(RenderLayerStackingNode* first, RenderLayerStackingNode* second)
-{
-    return first->zIndex() < second->zIndex();
-}
-
-RenderLayerCompositor* RenderLayerStackingNode::compositor() const
-{
-    ASSERT(renderer()->view());
-    return renderer()->view()->compositor();
-}
-
-void RenderLayerStackingNode::dirtyZOrderLists()
-{
-    ASSERT(m_layerListMutationAllowed);
-    ASSERT(isStackingContext());
-
-#if ENABLE(ASSERT)
-    updateStackingParentForZOrderLists(0);
-#endif
-
-    if (m_posZOrderList)
-        m_posZOrderList->clear();
-    if (m_negZOrderList)
-        m_negZOrderList->clear();
-    m_zOrderListsDirty = true;
-
-    if (!renderer()->documentBeingDestroyed())
-        compositor()->setNeedsCompositingUpdate(CompositingUpdateRebuildTree);
-}
-
-void RenderLayerStackingNode::dirtyStackingContextZOrderLists()
-{
-    if (RenderLayerStackingNode* stackingNode = ancestorStackingContextNode())
-        stackingNode->dirtyZOrderLists();
-}
-
-void RenderLayerStackingNode::dirtyNormalFlowList()
-{
-    ASSERT(m_layerListMutationAllowed);
-
-#if ENABLE(ASSERT)
-    updateStackingParentForNormalFlowList(0);
-#endif
-
-    if (m_normalFlowList)
-        m_normalFlowList->clear();
-    m_normalFlowListDirty = true;
-
-    if (!renderer()->documentBeingDestroyed())
-        compositor()->setNeedsCompositingUpdate(CompositingUpdateRebuildTree);
-}
-
-void RenderLayerStackingNode::rebuildZOrderLists()
-{
-    ASSERT(m_layerListMutationAllowed);
-    ASSERT(isDirtyStackingContext());
-
-    for (RenderLayer* child = layer()->firstChild(); child; child = child->nextSibling()) {
-        if (!layer()->reflectionInfo() || layer()->reflectionInfo()->reflectionLayer() != child)
-            child->stackingNode()->collectLayers(m_posZOrderList, m_negZOrderList);
-    }
-
-    // Sort the two lists.
-    if (m_posZOrderList)
-        std::stable_sort(m_posZOrderList->begin(), m_posZOrderList->end(), compareZIndex);
-
-    if (m_negZOrderList)
-        std::stable_sort(m_negZOrderList->begin(), m_negZOrderList->end(), compareZIndex);
-
-    // Append layers for top layer elements after normal layer collection, to ensure they are on top regardless of z-indexes.
-    // The renderers of top layer elements are children of the view, sorted in top layer stacking order.
-    if (layer()->isRootLayer()) {
-        RenderView* view = renderer()->view();
-        for (RenderObject* child = view->firstChild(); child; child = child->nextSibling()) {
-            Element* childElement = (child->node() && child->node()->isElementNode()) ? toElement(child->node()) : 0;
-            if (childElement && childElement->isInTopLayer()) {
-                RenderLayer* layer = toRenderLayerModelObject(child)->layer();
-                // Create the buffer if it doesn't exist yet.
-                if (!m_posZOrderList)
-                    m_posZOrderList = adoptPtr(new Vector<RenderLayerStackingNode*>);
-                m_posZOrderList->append(layer->stackingNode());
-            }
-        }
-    }
-
-#if ENABLE(ASSERT)
-    updateStackingParentForZOrderLists(this);
-#endif
-
-    m_zOrderListsDirty = false;
-}
-
-void RenderLayerStackingNode::updateNormalFlowList()
-{
-    if (!m_normalFlowListDirty)
-        return;
-
-    ASSERT(m_layerListMutationAllowed);
-
-    for (RenderLayer* child = layer()->firstChild(); child; child = child->nextSibling()) {
-        if (child->stackingNode()->isNormalFlowOnly() && (!layer()->reflectionInfo() || layer()->reflectionInfo()->reflectionLayer() != child)) {
-            if (!m_normalFlowList)
-                m_normalFlowList = adoptPtr(new Vector<RenderLayerStackingNode*>);
-            m_normalFlowList->append(child->stackingNode());
-        }
-    }
-
-#if ENABLE(ASSERT)
-    updateStackingParentForNormalFlowList(this);
-#endif
-
-    m_normalFlowListDirty = false;
-}
-
-void RenderLayerStackingNode::collectLayers(OwnPtr<Vector<RenderLayerStackingNode*> >& posBuffer, OwnPtr<Vector<RenderLayerStackingNode*> >& negBuffer)
-{
-    if (layer()->isInTopLayer())
-        return;
-
-    if (!isNormalFlowOnly()) {
-        OwnPtr<Vector<RenderLayerStackingNode*> >& buffer = (zIndex() >= 0) ? posBuffer : negBuffer;
-        if (!buffer)
-            buffer = adoptPtr(new Vector<RenderLayerStackingNode*>);
-        buffer->append(this);
-    }
-
-    if (!isStackingContext()) {
-        for (RenderLayer* child = layer()->firstChild(); child; child = child->nextSibling()) {
-            if (!layer()->reflectionInfo() || layer()->reflectionInfo()->reflectionLayer() != child)
-                child->stackingNode()->collectLayers(posBuffer, negBuffer);
-        }
-    }
-}
-
-#if ENABLE(ASSERT)
-bool RenderLayerStackingNode::isInStackingParentZOrderLists() const
-{
-    if (!m_stackingParent || m_stackingParent->zOrderListsDirty())
-        return false;
-
-    if (m_stackingParent->posZOrderList() && m_stackingParent->posZOrderList()->find(this) != kNotFound)
-        return true;
-
-    if (m_stackingParent->negZOrderList() && m_stackingParent->negZOrderList()->find(this) != kNotFound)
-        return true;
-
-    return false;
-}
-
-bool RenderLayerStackingNode::isInStackingParentNormalFlowList() const
-{
-    if (!m_stackingParent || m_stackingParent->normalFlowListDirty())
-        return false;
-
-    return (m_stackingParent->normalFlowList() && m_stackingParent->normalFlowList()->find(this) != kNotFound);
-}
-
-void RenderLayerStackingNode::updateStackingParentForZOrderLists(RenderLayerStackingNode* stackingParent)
-{
-    if (m_posZOrderList) {
-        for (size_t i = 0; i < m_posZOrderList->size(); ++i)
-            m_posZOrderList->at(i)->setStackingParent(stackingParent);
-    }
-
-    if (m_negZOrderList) {
-        for (size_t i = 0; i < m_negZOrderList->size(); ++i)
-            m_negZOrderList->at(i)->setStackingParent(stackingParent);
-    }
-}
-
-void RenderLayerStackingNode::updateStackingParentForNormalFlowList(RenderLayerStackingNode* stackingParent)
-{
-    if (m_normalFlowList) {
-        for (size_t i = 0; i < m_normalFlowList->size(); ++i)
-            m_normalFlowList->at(i)->setStackingParent(stackingParent);
-    }
-}
-#endif
-
-void RenderLayerStackingNode::updateLayerListsIfNeeded()
-{
-    updateZOrderLists();
-    updateNormalFlowList();
-
-    if (!layer()->reflectionInfo())
-        return;
-
-    RenderLayer* reflectionLayer = layer()->reflectionInfo()->reflectionLayer();
-    reflectionLayer->stackingNode()->updateZOrderLists();
-    reflectionLayer->stackingNode()->updateNormalFlowList();
-}
-
-void RenderLayerStackingNode::updateStackingNodesAfterStyleChange(const RenderStyle* oldStyle)
-{
-    bool wasStackingContext = oldStyle ? !oldStyle->hasAutoZIndex() : false;
-    int oldZIndex = oldStyle ? oldStyle->zIndex() : 0;
-
-    bool isStackingContext = this->isStackingContext();
-    if (isStackingContext == wasStackingContext && oldZIndex == zIndex())
-        return;
-
-    dirtyStackingContextZOrderLists();
-
-    if (isStackingContext)
-        dirtyZOrderLists();
-    else
-        clearZOrderLists();
-}
-
-// FIXME: Rename shouldBeNormalFlowOnly to something more accurate now that CSS
-// 2.1 defines the term "normal flow".
-bool RenderLayerStackingNode::shouldBeNormalFlowOnly() const
-{
-    return !isStackingContext() && !renderer()->isPositioned();
-}
-
-void RenderLayerStackingNode::updateIsNormalFlowOnly()
-{
-    bool isNormalFlowOnly = shouldBeNormalFlowOnly();
-    if (isNormalFlowOnly == this->isNormalFlowOnly())
-        return;
-
-    m_isNormalFlowOnly = isNormalFlowOnly;
-    if (RenderLayer* p = layer()->parent())
-        p->stackingNode()->dirtyNormalFlowList();
-    dirtyStackingContextZOrderLists();
-}
-
-RenderLayerStackingNode* RenderLayerStackingNode::ancestorStackingContextNode() const
-{
-    for (RenderLayer* ancestor = layer()->parent(); ancestor; ancestor = ancestor->parent()) {
-        RenderLayerStackingNode* stackingNode = ancestor->stackingNode();
-        if (stackingNode->isStackingContext())
-            return stackingNode;
-    }
-    return 0;
-}
-
-RenderLayerModelObject* RenderLayerStackingNode::renderer() const
-{
-    return m_layer->renderer();
-}
-
-} // namespace blink