1 files changed, 192 insertions, 0 deletions
diff --git a/WebCore/rendering/RootInlineBox.h b/WebCore/rendering/RootInlineBox.h
new file mode 100644
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+++ b/WebCore/rendering/RootInlineBox.h
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+/*
+ * This file is part of the line box implementation for KDE.
+ *
+ * Copyright (C) 2003, 2006 Apple Computer, Inc.
+ *
+ * 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 RootInlineBox_h
+#define RootInlineBox_h
+
+#include "BidiContext.h"
+#include "InlineFlowBox.h"
+
+namespace WebCore {
+
+class BidiStatus;
+class EllipsisBox;
+class HitTestResult;
+struct GapRects;
+
+class RootInlineBox : public InlineFlowBox {
+public:
+    RootInlineBox(RenderObject* obj)
+        : InlineFlowBox(obj)
+        , m_overflow(0)
+        , m_lineBreakObj(0)
+        , m_lineBreakPos(0)
+    {
+    }
+
+    virtual bool isRootInlineBox() { return true; }
+
+    virtual void destroy(RenderArena*);
+    void detachEllipsisBox(RenderArena*);
+
+    RootInlineBox* nextRootBox() { return static_cast<RootInlineBox*>(m_nextLine); }
+    RootInlineBox* prevRootBox() { return static_cast<RootInlineBox*>(m_prevLine); }
+
+    virtual void adjustPosition(int dx, int dy);
+
+    virtual int topOverflow() { return m_overflow ? m_overflow->m_topOverflow : m_y; }
+    virtual int bottomOverflow() { return m_overflow ? m_overflow->m_bottomOverflow : m_y + m_height; }
+    virtual int leftOverflow() { return m_overflow ? m_overflow->m_leftOverflow : m_x; }
+    virtual int rightOverflow() { return m_overflow ? m_overflow->m_rightOverflow : m_x + m_width; }
+
+    virtual void setVerticalOverflowPositions(int top, int bottom);
+    void setHorizontalOverflowPositions(int left, int right);
+
+    virtual void setVerticalSelectionPositions(int top, int bottom);
+
+#if ENABLE(SVG)
+    virtual void computePerCharacterLayoutInformation() { }
+#endif
+
+    RenderObject* lineBreakObj() const { return m_lineBreakObj; }
+    BidiStatus lineBreakBidiStatus() const;
+    void setLineBreakInfo(RenderObject*, unsigned breakPos, const BidiStatus&);
+
+    unsigned lineBreakPos() const { return m_lineBreakPos; }
+    void setLineBreakPos(unsigned p) { m_lineBreakPos = p; }
+
+    int blockHeight() const { return m_blockHeight; }
+    void setBlockHeight(int h) { m_blockHeight = h; }
+
+    bool endsWithBreak() const { return m_endsWithBreak; }
+    void setEndsWithBreak(bool b) { m_endsWithBreak = b; }
+
+    void childRemoved(InlineBox* box);
+
+    bool canAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth);
+    void placeEllipsis(const AtomicString& ellipsisStr, bool ltr, int blockEdge, int ellipsisWidth, InlineBox* markupBox = 0);
+    virtual int placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox);
+
+    EllipsisBox* ellipsisBox() const;
+
+    void paintEllipsisBox(RenderObject::PaintInfo&, int tx, int ty) const;
+    bool hitTestEllipsisBox(HitTestResult&, int x, int y, int tx, int ty, HitTestAction, bool);
+
+    virtual void clearTruncation();
+
+#if PLATFORM(MAC)
+    void addHighlightOverflow();
+    void paintCustomHighlight(RenderObject::PaintInfo&, int tx, int ty, const AtomicString& highlightType);
+#endif
+
+    virtual void paint(RenderObject::PaintInfo&, int tx, int ty);
+    virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int, int, int, int);
+
+    bool hasSelectedChildren() const { return m_hasSelectedChildren; }
+    void setHasSelectedChildren(bool);
+
+    virtual RenderObject::SelectionState selectionState();
+    InlineBox* firstSelectedBox();
+    InlineBox* lastSelectedBox();
+
+    GapRects fillLineSelectionGap(int selTop, int selHeight, RenderBlock* rootBlock, int blockX, int blockY,
+                                  int tx, int ty, const RenderObject::PaintInfo*);
+
+    RenderBlock* block() const;
+
+    int selectionTop();
+    int selectionBottom() { return m_overflow ? m_overflow->m_selectionBottom : m_y + m_height; }
+    int selectionHeight() { return max(0, selectionBottom() - selectionTop()); }
+
+    InlineBox* closestLeafChildForXPos(int x, bool onlyEditableLeaves = false);
+
+protected:
+    // Normally we are only as tall as the style on our block dictates, but we might have content
+    // that spills out above the height of our font (e.g, a tall image), or something that extends further
+    // below our line (e.g., a child whose font has a huge descent).
+        
+    // Allocated only when some of these fields have non-default values
+    struct Overflow {
+        Overflow(RootInlineBox* box) 
+            : m_topOverflow(box->m_y)
+            , m_bottomOverflow(box->m_y + box->m_height)
+            , m_leftOverflow(box->m_x)
+            , m_rightOverflow(box->m_x + box->m_width)
+            , m_selectionTop(box->m_y)
+            , m_selectionBottom(box->m_y + box->m_height)
+            {
+            }
+        void destroy(RenderArena*);
+        void* operator new(size_t, RenderArena*) throw();
+        void operator delete(void*, size_t);
+        
+        int m_topOverflow;
+        int m_bottomOverflow;
+        int m_leftOverflow;
+        int m_rightOverflow;
+        int m_selectionTop;
+        int m_selectionBottom;
+    private:
+        void* operator new(size_t) throw();
+    };
+    
+    Overflow* m_overflow;
+
+    // Where this line ended.  The exact object and the position within that object are stored so that
+    // we can create a BidiIterator beginning just after the end of this line.
+    RenderObject* m_lineBreakObj;
+    unsigned m_lineBreakPos;
+    RefPtr<BidiContext> m_lineBreakContext;
+
+    // The height of the block at the end of this line.  This is where the next line starts.
+    int m_blockHeight;
+
+    WTF::Unicode::Direction m_lineBreakBidiStatusEor : 5;
+    WTF::Unicode::Direction m_lineBreakBidiStatusLastStrong : 5;
+    WTF::Unicode::Direction m_lineBreakBidiStatusLast : 5;
+};
+
+inline void RootInlineBox::setHorizontalOverflowPositions(int left, int right) 
+{ 
+    if (!m_overflow) {
+        if (left == m_x && right == m_x + m_width)
+            return;
+        m_overflow = new (m_object->renderArena()) Overflow(this);       
+    }
+    m_overflow->m_leftOverflow = left; 
+    m_overflow->m_rightOverflow = right; 
+}
+
+inline void RootInlineBox::setVerticalSelectionPositions(int top, int bottom) 
+{ 
+    if (!m_overflow) {
+        if (top == m_y && bottom == m_y + m_height)
+            return;
+        m_overflow = new (m_object->renderArena()) Overflow(this);
+    }
+    m_overflow->m_selectionTop = top; 
+    m_overflow->m_selectionBottom = bottom; 
+}
+
+} // namespace WebCore
+
+#endif // RootInlineBox_h