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/*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef InlineFlowBox_h
#define InlineFlowBox_h
#include "InlineBox.h"
#include "RenderOverflow.h"
namespace WebCore {
class HitTestRequest;
class HitTestResult;
class InlineTextBox;
class RenderLineBoxList;
typedef HashMap<const InlineTextBox*, pair<Vector<const SimpleFontData*>, GlyphOverflow> > GlyphOverflowAndFallbackFontsMap;
class InlineFlowBox : public InlineBox {
public:
InlineFlowBox(RenderObject* obj)
: InlineBox(obj)
, m_firstChild(0)
, m_lastChild(0)
, m_prevLineBox(0)
, m_nextLineBox(0)
, m_includeLeftEdge(false)
, m_includeRightEdge(false)
#ifndef NDEBUG
, m_hasBadChildList(false)
#endif
{
// Internet Explorer and Firefox always create a marker for list items, even when the list-style-type is none. We do not make a marker
// in the list-style-type: none case, since it is wasteful to do so. However, in order to match other browsers we have to pretend like
// an invisible marker exists. The side effect of having an invisible marker is that the quirks mode behavior of shrinking lines with no
// text children must not apply. This change also means that gaps will exist between image bullet list items. Even when the list bullet
// is an image, the line is still considered to be immune from the quirk.
m_hasTextChildren = obj->style()->display() == LIST_ITEM;
}
#ifndef NDEBUG
virtual ~InlineFlowBox();
#endif
InlineFlowBox* prevLineBox() const { return m_prevLineBox; }
InlineFlowBox* nextLineBox() const { return m_nextLineBox; }
void setNextLineBox(InlineFlowBox* n) { m_nextLineBox = n; }
void setPreviousLineBox(InlineFlowBox* p) { m_prevLineBox = p; }
InlineBox* firstChild() const { checkConsistency(); return m_firstChild; }
InlineBox* lastChild() const { checkConsistency(); return m_lastChild; }
virtual bool isLeaf() const { return false; }
InlineBox* firstLeafChild() const;
InlineBox* lastLeafChild() const;
virtual void setConstructed()
{
InlineBox::setConstructed();
if (firstChild())
firstChild()->setConstructed();
}
void addToLine(InlineBox* child);
virtual void deleteLine(RenderArena*);
virtual void extractLine();
virtual void attachLine();
virtual void adjustPosition(int dx, int dy);
virtual void extractLineBoxFromRenderObject();
virtual void attachLineBoxToRenderObject();
virtual void removeLineBoxFromRenderObject();
virtual void clearTruncation();
virtual void paintBoxDecorations(PaintInfo&, int tx, int ty);
virtual void paintMask(PaintInfo&, int tx, int ty);
void paintFillLayers(const PaintInfo&, const Color&, const FillLayer*, int tx, int ty, int w, int h, CompositeOperator = CompositeSourceOver);
void paintFillLayer(const PaintInfo&, const Color&, const FillLayer*, int tx, int ty, int w, int h, CompositeOperator = CompositeSourceOver);
void paintBoxShadow(GraphicsContext*, RenderStyle*, ShadowStyle, int tx, int ty, int w, int h);
virtual void paintTextDecorations(PaintInfo&, int tx, int ty, bool paintedChildren = false);
virtual void paint(PaintInfo&, int tx, int ty);
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty);
virtual RenderLineBoxList* rendererLineBoxes() const;
int marginBorderPaddingLeft() const { return marginLeft() + borderLeft() + paddingLeft(); }
int marginBorderPaddingRight() const { return marginRight() + borderRight() + paddingRight(); }
int marginLeft() const { if (includeLeftEdge()) return boxModelObject()->marginLeft(); return 0; }
int marginRight() const { if (includeRightEdge()) return boxModelObject()->marginRight(); return 0; }
int borderLeft() const { if (includeLeftEdge()) return renderer()->style()->borderLeftWidth(); return 0; }
int borderRight() const { if (includeRightEdge()) return renderer()->style()->borderRightWidth(); return 0; }
int borderTop() const { return renderer()->style()->borderTopWidth(); }
int borderBottom() const { return renderer()->style()->borderBottomWidth(); }
int paddingLeft() const { if (includeLeftEdge()) return boxModelObject()->paddingLeft(); return 0; }
int paddingRight() const { if (includeRightEdge()) return boxModelObject()->paddingRight(); return 0; }
int paddingTop() const { return boxModelObject()->paddingTop(); }
int paddingBottom() const { return boxModelObject()->paddingBottom(); }
bool includeLeftEdge() const { return m_includeLeftEdge; }
bool includeRightEdge() const { return m_includeRightEdge; }
void setEdges(bool includeLeft, bool includeRight)
{
m_includeLeftEdge = includeLeft;
m_includeRightEdge = includeRight;
}
// Helper functions used during line construction and placement.
void determineSpacingForFlowBoxes(bool lastLine, RenderObject* endObject);
int getFlowSpacingWidth();
bool onEndChain(RenderObject* endObject);
int placeBoxesHorizontally(int x, bool& needsWordSpacing, GlyphOverflowAndFallbackFontsMap&);
void computeLogicalBoxHeights(int& maxPositionTop, int& maxPositionBottom,
int& maxAscent, int& maxDescent, bool strictMode, GlyphOverflowAndFallbackFontsMap&);
void adjustMaxAscentAndDescent(int& maxAscent, int& maxDescent,
int maxPositionTop, int maxPositionBottom);
void placeBoxesVertically(int y, int maxHeight, int maxAscent, bool strictMode, int& lineTop, int& lineBottom);
void computeVerticalOverflow(int lineTop, int lineBottom, bool strictMode, GlyphOverflowAndFallbackFontsMap&);
void removeChild(InlineBox* child);
virtual RenderObject::SelectionState selectionState();
virtual bool canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth);
virtual int placeEllipsisBox(bool ltr, int blockLeftEdge, int blockRightEdge, int ellipsisWidth, bool&);
bool hasTextChildren() const { return m_hasTextChildren; }
void checkConsistency() const;
void setHasBadChildList();
int topVisibleOverflow() const { return std::min(topLayoutOverflow(), topVisualOverflow()); }
int bottomVisibleOverflow() const { return std::max(bottomLayoutOverflow(), bottomVisualOverflow()); }
int leftVisibleOverflow() const { return std::min(leftLayoutOverflow(), leftVisualOverflow()); }
int rightVisibleOverflow() const { return std::max(rightLayoutOverflow(), rightVisualOverflow()); }
IntRect visibleOverflowRect() const { return m_overflow ? m_overflow->visibleOverflowRect() : IntRect(m_x, m_y, m_width, height()); }
int topLayoutOverflow() const { return m_overflow ? m_overflow->topLayoutOverflow() : m_y; }
int bottomLayoutOverflow() const { return m_overflow ? m_overflow->bottomLayoutOverflow() : m_y + height(); }
int leftLayoutOverflow() const { return m_overflow ? m_overflow->leftLayoutOverflow() : m_x; }
int rightLayoutOverflow() const { return m_overflow ? m_overflow->rightLayoutOverflow() : m_x + m_width; }
IntRect layoutOverflowRect() const { return m_overflow ? m_overflow->layoutOverflowRect() : IntRect(m_x, m_y, m_width, height()); }
int topVisualOverflow() const { return m_overflow ? m_overflow->topVisualOverflow() : m_y; }
int bottomVisualOverflow() const { return m_overflow ? m_overflow->bottomVisualOverflow() : m_y + height(); }
int leftVisualOverflow() const { return m_overflow ? m_overflow->leftVisualOverflow() : m_x; }
int rightVisualOverflow() const { return m_overflow ? m_overflow->rightVisualOverflow() : m_x + m_width; }
IntRect visualOverflowRect() const { return m_overflow ? m_overflow->visualOverflowRect() : IntRect(m_x, m_y, m_width, height()); }
void setHorizontalOverflowPositions(int leftLayoutOverflow, int rightLayoutOverflow, int leftVisualOverflow, int rightVisualOverflow);
void setVerticalOverflowPositions(int topLayoutOverflow, int bottomLayoutOverflow, int topVisualOverflow, int bottomVisualOverflow, int boxHeight);
protected:
OwnPtr<RenderOverflow> m_overflow;
virtual bool isInlineFlowBox() const { return true; }
InlineBox* m_firstChild;
InlineBox* m_lastChild;
InlineFlowBox* m_prevLineBox; // The previous box that also uses our RenderObject
InlineFlowBox* m_nextLineBox; // The next box that also uses our RenderObject
bool m_includeLeftEdge : 1;
bool m_includeRightEdge : 1;
bool m_hasTextChildren : 1;
#ifndef NDEBUG
bool m_hasBadChildList;
#endif
};
inline void InlineFlowBox::setHorizontalOverflowPositions(int leftLayoutOverflow, int rightLayoutOverflow, int leftVisualOverflow, int rightVisualOverflow)
{
if (!m_overflow) {
if (leftLayoutOverflow == m_x && rightLayoutOverflow == m_x + m_width && leftVisualOverflow == m_x && rightVisualOverflow == m_x + m_width)
return;
m_overflow.set(new RenderOverflow(IntRect(m_x, m_y, m_width, m_renderer->style(m_firstLine)->font().height())));
}
m_overflow->setLeftLayoutOverflow(leftLayoutOverflow);
m_overflow->setRightLayoutOverflow(rightLayoutOverflow);
m_overflow->setLeftVisualOverflow(leftVisualOverflow);
m_overflow->setRightVisualOverflow(rightVisualOverflow);
}
inline void InlineFlowBox::setVerticalOverflowPositions(int topLayoutOverflow, int bottomLayoutOverflow, int topVisualOverflow, int bottomVisualOverflow, int boxHeight)
{
if (!m_overflow) {
if (topLayoutOverflow == m_y && bottomLayoutOverflow == m_y + boxHeight && topVisualOverflow == m_y && bottomVisualOverflow == m_y + boxHeight)
return;
m_overflow.set(new RenderOverflow(IntRect(m_x, m_y, m_width, boxHeight)));
}
m_overflow->setTopLayoutOverflow(topLayoutOverflow);
m_overflow->setBottomLayoutOverflow(bottomLayoutOverflow);
m_overflow->setTopVisualOverflow(topVisualOverflow);
m_overflow->setBottomVisualOverflow(bottomVisualOverflow);
}
#ifdef NDEBUG
inline void InlineFlowBox::checkConsistency() const
{
}
#endif
inline void InlineFlowBox::setHasBadChildList()
{
#ifndef NDEBUG
m_hasBadChildList = true;
#endif
}
} // namespace WebCore
#ifndef NDEBUG
// Outside the WebCore namespace for ease of invocation from gdb.
void showTree(const WebCore::InlineFlowBox*);
#endif
#endif // InlineFlowBox_h
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