| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef RenderLazyBlock_h |
| #define RenderLazyBlock_h |
| |
| #include "core/rendering/RenderBlock.h" |
| |
| namespace WebCore { |
| |
| class RenderLazyBlock FINAL : public RenderBlock { |
| public: |
| RenderLazyBlock(Element*); |
| virtual ~RenderLazyBlock(); |
| |
| bool isAttached() const { return m_attached; } |
| bool isNested() const; |
| |
| void markForNestedLayout() |
| { |
| setNeedsLayout(); |
| m_isNestedLayout = true; |
| } |
| |
| RenderLazyBlock* next() const { return m_next; } |
| RenderLazyBlock* previous() const { return m_previous; } |
| |
| RenderBox* firstVisibleChildBox() const { return m_firstVisibleChildBox; } |
| RenderBox* lastVisibleChildBox() const { return m_lastVisibleChildBox; } |
| |
| private: |
| virtual void paintChildren(PaintInfo&, const LayoutPoint&) OVERRIDE; |
| |
| virtual bool isRenderLazyBlock() const OVERRIDE { return true; } |
| virtual void willBeDestroyed() OVERRIDE; |
| virtual void willBeRemovedFromTree() OVERRIDE; |
| virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight) OVERRIDE; |
| |
| void layoutChildren(bool relayoutChildren); |
| |
| void attachLazyBlock(); |
| void detachLazyBlock(); |
| |
| RenderLazyBlock* m_next; |
| RenderLazyBlock* m_previous; |
| RenderBox* m_firstVisibleChildBox; |
| RenderBox* m_lastVisibleChildBox; |
| bool m_attached; |
| bool m_isNestedLayout; |
| LayoutRect m_intersectRect; |
| IntRect m_expandedViewportRect; |
| }; |
| |
| inline RenderLazyBlock* toRenderLazyBlock(RenderObject* object) |
| { |
| ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderLazyBlock()); |
| return static_cast<RenderLazyBlock*>(object); |
| } |
| |
| inline const RenderLazyBlock* toRenderLazyBlock(const RenderObject* object) |
| { |
| ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderLazyBlock()); |
| return static_cast<const RenderLazyBlock*>(object); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // RenderLazyBlock_h |