author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 27 Apr 2010 17:46:17 +0300 | |
branch | RCL_3 |
changeset 67 | 4917f9bf7995 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
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* (C) 1999 Antti Koivisto (koivisto@kde.org) |
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* Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#ifndef RenderFlow_h |
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#define RenderFlow_h |
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#include "RenderContainer.h" |
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namespace WebCore { |
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/** |
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* all geometry managing stuff is only in the block elements. |
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* |
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* Inline elements don't layout themselves, but the whole paragraph |
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* gets flowed by the surrounding block element. This is, because |
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* one needs to know the whole paragraph to calculate bidirectional |
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* behaviour of text, so putting the layouting routines in the inline |
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* elements is impossible. |
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*/ |
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class RenderFlow : public RenderContainer { |
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public: |
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RenderFlow(Node* node) |
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: RenderContainer(node) |
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, m_continuation(0) |
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, m_firstLineBox(0) |
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, m_lastLineBox(0) |
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, m_lineHeight(-1) |
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, m_childrenInline(true) |
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, m_firstLine(false) |
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, m_clearStatus(CNONE) |
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, m_topMarginQuirk(false) |
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, m_bottomMarginQuirk(false) |
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, m_hasMarkupTruncation(false) |
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, m_selectionState(SelectionNone) |
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, m_hasColumns(false) |
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, m_isContinuation(false) |
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{ |
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} |
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#ifndef NDEBUG |
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virtual ~RenderFlow(); |
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#endif |
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virtual RenderFlow* continuation() const { return m_continuation; } |
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void setContinuation(RenderFlow* c) { m_continuation = c; } |
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RenderFlow* continuationBefore(RenderObject* beforeChild); |
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void addChildWithContinuation(RenderObject* newChild, RenderObject* beforeChild); |
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virtual void addChildToFlow(RenderObject* newChild, RenderObject* beforeChild) = 0; |
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virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0); |
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static RenderFlow* createAnonymousFlow(Document*, RenderStyle*); |
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void extractLineBox(InlineFlowBox*); |
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void attachLineBox(InlineFlowBox*); |
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void removeLineBox(InlineFlowBox*); |
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void deleteLineBoxes(); |
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virtual void destroy(); |
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virtual void dirtyLinesFromChangedChild(RenderObject* child); |
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virtual short lineHeight(bool firstLine, bool isRootLineBox = false) const; |
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InlineFlowBox* firstLineBox() const { return m_firstLineBox; } |
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InlineFlowBox* lastLineBox() const { return m_lastLineBox; } |
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virtual InlineBox* createInlineBox(bool makePlaceHolderBox, bool isRootLineBox, bool isOnlyRun=false); |
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virtual void dirtyLineBoxes(bool fullLayout, bool isRootLineBox = false); |
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void paintLines(PaintInfo&, int tx, int ty); |
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bool hitTestLines(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction); |
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virtual IntRect absoluteClippedOverflowRect(); |
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virtual int lowestPosition(bool includeOverflowInterior = true, bool includeSelf = true) const; |
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virtual int rightmostPosition(bool includeOverflowInterior = true, bool includeSelf = true) const; |
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virtual int leftmostPosition(bool includeOverflowInterior = true, bool includeSelf = true) const; |
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virtual IntRect caretRect(int offset, EAffinity = UPSTREAM, int* extraWidthToEndOfLine = 0); |
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virtual void addFocusRingRects(GraphicsContext*, int tx, int ty); |
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void paintOutlineForLine(GraphicsContext*, int tx, int ty, const IntRect& prevLine, const IntRect& thisLine, const IntRect& nextLine); |
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void paintOutline(GraphicsContext*, int tx, int ty); |
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virtual bool hasColumns() const { return m_hasColumns; } |
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virtual bool isWordBreak() const { ASSERT(isInlineFlow()); return false; } |
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void checkConsistency() const; |
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private: |
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// An inline can be split with blocks occurring in between the inline content. |
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// When this occurs we need a pointer to our next object. We can basically be |
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// split into a sequence of inlines and blocks. The continuation will either be |
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// an anonymous block (that houses other blocks) or it will be an inline flow. |
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RenderFlow* m_continuation; |
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protected: |
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// For block flows, each box represents the root inline box for a line in the |
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// paragraph. |
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// For inline flows, each box represents a portion of that inline. |
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InlineFlowBox* m_firstLineBox; |
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InlineFlowBox* m_lastLineBox; |
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mutable short m_lineHeight; |
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// These bitfields are moved here from subclasses to pack them together |
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// from RenderBlock |
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bool m_childrenInline : 1; |
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bool m_firstLine : 1; |
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unsigned m_clearStatus : 2; // EClear |
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bool m_topMarginQuirk : 1; |
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bool m_bottomMarginQuirk : 1; |
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bool m_hasMarkupTruncation : 1; |
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unsigned m_selectionState : 3; // SelectionState |
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bool m_hasColumns : 1; |
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// from RenderInline |
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bool m_isContinuation : 1; // Whether or not we're a continuation of an inline. |
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}; |
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#ifdef NDEBUG |
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inline void RenderFlow::checkConsistency() const |
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{ |
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} |
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#endif |
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} // namespace WebCore |
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#endif // RenderFlow_h |