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author | Steve Block <steveblock@google.com> | 2011-05-06 11:45:16 +0100 |
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committer | Steve Block <steveblock@google.com> | 2011-05-12 13:44:10 +0100 |
commit | cad810f21b803229eb11403f9209855525a25d57 (patch) | |
tree | 29a6fd0279be608e0fe9ffe9841f722f0f4e4269 /Source/WebCore/rendering/LayoutState.h | |
parent | 121b0cf4517156d0ac5111caf9830c51b69bae8f (diff) | |
download | external_webkit-cad810f21b803229eb11403f9209855525a25d57.zip external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.gz external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.bz2 |
Merge WebKit at r75315: Initial merge by git.
Change-Id: I570314b346ce101c935ed22a626b48c2af266b84
Diffstat (limited to 'Source/WebCore/rendering/LayoutState.h')
-rw-r--r-- | Source/WebCore/rendering/LayoutState.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/LayoutState.h b/Source/WebCore/rendering/LayoutState.h new file mode 100644 index 0000000..0d06cb1 --- /dev/null +++ b/Source/WebCore/rendering/LayoutState.h @@ -0,0 +1,104 @@ +/* + * Copyright (C) 2007 Apple 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: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 LayoutState_h +#define LayoutState_h + +#include "IntRect.h" +#include "IntSize.h" +#include <wtf/Noncopyable.h> + +namespace WebCore { + +class ColumnInfo; +class RenderArena; +class RenderBox; +class RenderObject; + +class LayoutState : public Noncopyable { +public: + LayoutState() + : m_clipped(false) + , m_pageLogicalHeight(0) + , m_pageLogicalHeightChanged(false) + , m_columnInfo(0) + , m_next(0) +#ifndef NDEBUG + , m_renderer(0) +#endif + { + } + + LayoutState(LayoutState*, RenderBox*, const IntSize& offset, int pageHeight, bool pageHeightChanged, ColumnInfo*); + LayoutState(RenderObject*); + + void destroy(RenderArena*); + + // Overloaded new operator. + void* operator new(size_t, RenderArena*) throw(); + + // Overridden to prevent the normal delete from being called. + void operator delete(void*, size_t); + + void clearPaginationInformation(); + bool isPaginatingColumns() const { return m_columnInfo; } + bool isPaginated() const { return m_pageLogicalHeight || m_columnInfo; } + + // The page logical offset is the object's offset from the top of the page in the page progression + // direction (so an x-offset in vertical text and a y-offset for horizontal text). + int pageLogicalOffset(int childLogicalOffset) const; + + void addForcedColumnBreak(int childY); + + bool pageLogicalHeight() const { return m_pageLogicalHeight; } + bool pageLogicalHeightChanged() const { return m_pageLogicalHeightChanged; } + +private: + // The normal operator new is disallowed. + void* operator new(size_t) throw(); + +public: + bool m_clipped; + IntRect m_clipRect; + IntSize m_paintOffset; // x/y offset from container. Includes relative positioning and scroll offsets. + IntSize m_layoutOffset; // x/y offset from container. Does not include relative positioning or scroll offsets. + IntSize m_layoutDelta; // Transient offset from the final position of the object + // used to ensure that repaints happen in the correct place. + // This is a total delta accumulated from the root. + + int m_pageLogicalHeight; // The current page height for the pagination model that encloses us. + bool m_pageLogicalHeightChanged; // If our page height has changed, this will force all blocks to relayout. + IntSize m_pageOffset; // The offset of the start of the first page in the nearest enclosing pagination model. + ColumnInfo* m_columnInfo; // If the enclosing pagination model is a column model, then this will store column information for easy retrieval/manipulation. + + LayoutState* m_next; +#ifndef NDEBUG + RenderObject* m_renderer; +#endif +}; + +} // namespace WebCore + +#endif // LayoutState_h |