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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#ifndef RenderFlow_h
#define RenderFlow_h
#include "RenderContainer.h"
namespace WebCore {
/**
* all geometry managing stuff is only in the block elements.
*
* Inline elements don't layout themselves, but the whole paragraph
* gets flowed by the surrounding block element. This is, because
* one needs to know the whole paragraph to calculate bidirectional
* behaviour of text, so putting the layouting routines in the inline
* elements is impossible.
*/
class RenderFlow : public RenderContainer {
public:
RenderFlow(Node* node)
: RenderContainer(node)
, m_continuation(0)
, m_firstLineBox(0)
, m_lastLineBox(0)
, m_lineHeight(-1)
, m_childrenInline(true)
, m_firstLine(false)
, m_clearStatus(CNONE)
, m_topMarginQuirk(false)
, m_bottomMarginQuirk(false)
, m_hasMarkupTruncation(false)
, m_selectionState(SelectionNone)
, m_hasColumns(false)
, m_isContinuation(false)
{
}
#ifndef NDEBUG
virtual ~RenderFlow();
#endif
virtual RenderFlow* continuation() const { return m_continuation; }
void setContinuation(RenderFlow* c) { m_continuation = c; }
RenderFlow* continuationBefore(RenderObject* beforeChild);
void addChildWithContinuation(RenderObject* newChild, RenderObject* beforeChild);
virtual void addChildToFlow(RenderObject* newChild, RenderObject* beforeChild) = 0;
virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0);
static RenderFlow* createAnonymousFlow(Document*, RenderStyle*);
void extractLineBox(InlineFlowBox*);
void attachLineBox(InlineFlowBox*);
void removeLineBox(InlineFlowBox*);
void deleteLineBoxes();
virtual void destroy();
virtual void dirtyLinesFromChangedChild(RenderObject* child);
virtual short lineHeight(bool firstLine, bool isRootLineBox = false) const;
InlineFlowBox* firstLineBox() const { return m_firstLineBox; }
InlineFlowBox* lastLineBox() const { return m_lastLineBox; }
virtual InlineBox* createInlineBox(bool makePlaceHolderBox, bool isRootLineBox, bool isOnlyRun=false);
virtual void dirtyLineBoxes(bool fullLayout, bool isRootLineBox = false);
void paintLines(PaintInfo&, int tx, int ty);
bool hitTestLines(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
virtual IntRect absoluteClippedOverflowRect();
virtual int lowestPosition(bool includeOverflowInterior = true, bool includeSelf = true) const;
virtual int rightmostPosition(bool includeOverflowInterior = true, bool includeSelf = true) const;
virtual int leftmostPosition(bool includeOverflowInterior = true, bool includeSelf = true) const;
virtual IntRect caretRect(int offset, EAffinity = UPSTREAM, int* extraWidthToEndOfLine = 0);
virtual void addFocusRingRects(GraphicsContext*, int tx, int ty);
void paintOutlineForLine(GraphicsContext*, int tx, int ty, const IntRect& prevLine, const IntRect& thisLine, const IntRect& nextLine);
void paintOutline(GraphicsContext*, int tx, int ty);
virtual bool hasColumns() const { return m_hasColumns; }
virtual bool isWordBreak() const { ASSERT(isInlineFlow()); return false; }
void checkConsistency() const;
private:
// An inline can be split with blocks occurring in between the inline content.
// When this occurs we need a pointer to our next object. We can basically be
// split into a sequence of inlines and blocks. The continuation will either be
// an anonymous block (that houses other blocks) or it will be an inline flow.
RenderFlow* m_continuation;
protected:
// For block flows, each box represents the root inline box for a line in the
// paragraph.
// For inline flows, each box represents a portion of that inline.
InlineFlowBox* m_firstLineBox;
InlineFlowBox* m_lastLineBox;
mutable short m_lineHeight;
// These bitfields are moved here from subclasses to pack them together
// from RenderBlock
bool m_childrenInline : 1;
bool m_firstLine : 1;
unsigned m_clearStatus : 2; // EClear
bool m_topMarginQuirk : 1;
bool m_bottomMarginQuirk : 1;
bool m_hasMarkupTruncation : 1;
unsigned m_selectionState : 3; // SelectionState
bool m_hasColumns : 1;
// from RenderInline
bool m_isContinuation : 1; // Whether or not we're a continuation of an inline.
};
#ifdef NDEBUG
inline void RenderFlow::checkConsistency() const
{
}
#endif
} // namespace WebCore
#endif // RenderFlow_h
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