external/webkit r30707

1 files changed, 305 insertions, 0 deletions

diff --git a/WebCore/rendering/InlineBox.h b/WebCore/rendering/InlineBox.h
new file mode 100644
index 0000000..e51ed9b
--- /dev/null
+++ b/WebCore/rendering/InlineBox.h
@@ -0,0 +1,305 @@
+/*
+ * 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 InlineBox_h
+#define InlineBox_h
+
+#include "RenderObject.h" // needed for RenderObject::PaintInfo
+
+namespace WebCore {
+
+class HitTestResult;
+class RootInlineBox;
+
+struct HitTestRequest;
+
+// InlineBox represents a rectangle that occurs on a line.  It corresponds to
+// some RenderObject (i.e., it represents a portion of that RenderObject).
+class InlineBox {
+public:
+    InlineBox(RenderObject* obj)
+        : m_object(obj)
+        , m_x(0)
+        , m_y(0)
+        , m_width(0)
+        , m_height(0)
+        , m_baseline(0)
+        , m_next(0)
+        , m_prev(0)
+        , m_parent(0)
+        , m_firstLine(false)
+        , m_constructed(false)
+        , m_dirty(false)
+        , m_extracted(false)
+        , m_includeLeftEdge(false)
+        , m_includeRightEdge(false)
+        , m_hasTextChildren(true)
+        , m_endsWithBreak(false)
+        , m_hasSelectedChildren(false)
+        , m_hasEllipsisBox(false)
+        , m_reversed(false)
+        , m_treatAsText(true)
+        , m_determinedIfNextOnLineExists(false)
+        , m_determinedIfPrevOnLineExists(false)
+        , m_nextOnLineExists(false)
+        , m_prevOnLineExists(false)
+        , m_toAdd(0)
+#ifndef NDEBUG
+        , m_hasBadParent(false)
+#endif
+    {
+    }
+
+    InlineBox(RenderObject* obj, int x, int y, int width, int height, int baseline, bool firstLine, bool constructed,
+              bool dirty, bool extracted, InlineBox* next, InlineBox* prev, InlineFlowBox* parent)
+        : m_object(obj)
+        , m_x(x)
+        , m_y(y)
+        , m_width(width)
+        , m_height(height)
+        , m_baseline(baseline)
+        , m_next(next)
+        , m_prev(prev)
+        , m_parent(parent)
+        , m_firstLine(firstLine)
+        , m_constructed(constructed)
+        , m_dirty(dirty)
+        , m_extracted(extracted)
+        , m_includeLeftEdge(false)
+        , m_includeRightEdge(false)
+        , m_hasTextChildren(true)
+        , m_endsWithBreak(false)
+        , m_hasSelectedChildren(false)   
+        , m_hasEllipsisBox(false)
+        , m_reversed(false)
+        , m_treatAsText(true)
+        , m_determinedIfNextOnLineExists(false)
+        , m_determinedIfPrevOnLineExists(false)
+        , m_nextOnLineExists(false)
+        , m_prevOnLineExists(false)
+        , m_toAdd(0)
+#ifndef NDEBUG
+        , m_hasBadParent(false)
+#endif
+    {
+    }
+
+    virtual ~InlineBox();
+
+    virtual void destroy(RenderArena*);
+
+    virtual void deleteLine(RenderArena*);
+    virtual void extractLine();
+    virtual void attachLine();
+
+    virtual bool isLineBreak() const { return false; }
+
+    virtual void adjustPosition(int dx, int dy);
+
+    virtual void paint(RenderObject::PaintInfo&, int tx, int ty);
+    virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty);
+
+    // 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);
+
+private:
+    // The normal operator new is disallowed.
+    void* operator new(size_t) throw();
+
+public:
+#ifndef NDEBUG
+    void showTreeForThis() const;
+#endif
+    virtual bool isInlineBox() { return false; }
+    virtual bool isInlineFlowBox() { return false; }
+    virtual bool isContainer() { return false; }
+    virtual bool isInlineTextBox() { return false; }
+    virtual bool isRootInlineBox() { return false; }
+#if ENABLE(SVG) 
+    virtual bool isSVGRootInlineBox() { return false; }
+#endif
+    virtual bool isText() const { return false; }
+
+    bool isConstructed() { return m_constructed; }
+    virtual void setConstructed()
+    {
+        m_constructed = true;
+        if (m_next)
+            m_next->setConstructed();
+    }
+
+    void setExtracted(bool b = true) { m_extracted = b; }
+    
+    void setFirstLineStyleBit(bool f) { m_firstLine = f; }
+    bool isFirstLineStyle() const { return m_firstLine; }
+
+    void remove();
+
+    InlineBox* nextOnLine() const { return m_next; }
+    InlineBox* prevOnLine() const { return m_prev; }
+    void setNextOnLine(InlineBox* next)
+    {
+        ASSERT(m_parent || !next);
+        m_next = next;
+    }
+    void setPrevOnLine(InlineBox* prev)
+    {
+        ASSERT(m_parent || !prev);
+        m_prev = prev;
+    }
+    bool nextOnLineExists() const;
+    bool prevOnLineExists() const;
+
+    virtual InlineBox* firstLeafChild();
+    virtual InlineBox* lastLeafChild();
+    InlineBox* nextLeafChild();
+    InlineBox* prevLeafChild();
+        
+    RenderObject* object() const { return m_object; }
+
+    InlineFlowBox* parent() const
+    {
+        ASSERT(!m_hasBadParent);
+        return m_parent;
+    }
+    void setParent(InlineFlowBox* par) { m_parent = par; }
+
+    RootInlineBox* root();
+    
+    void setWidth(int w) { m_width = w; }
+    int width() const { return m_width; }
+
+    void setXPos(int x) { m_x = x; }
+    int xPos() const { return m_x; }
+
+    void setYPos(int y) { m_y = y; }
+    int yPos() const { return m_y; }
+
+    void setHeight(int h) { m_height = h; }
+    int height() const { return m_height; }
+    
+    void setBaseline(int b) { m_baseline = b; }
+    int baseline() const { return m_baseline; }
+
+    bool hasTextChildren() const { return m_hasTextChildren; }
+
+    virtual int topOverflow() { return yPos(); }
+    virtual int bottomOverflow() { return yPos() + height(); }
+    virtual int leftOverflow() { return xPos(); }
+    virtual int rightOverflow() { return xPos() + width(); }
+
+    virtual int caretMinOffset() const;
+    virtual int caretMaxOffset() const;
+    virtual unsigned caretMaxRenderedOffset() const;
+    
+    virtual void clearTruncation() { }
+
+    bool isDirty() const { return m_dirty; }
+    void markDirty(bool dirty = true) { m_dirty = dirty; }
+
+    void dirtyLineBoxes();
+    
+    virtual RenderObject::SelectionState selectionState();
+
+    virtual bool canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth);
+    virtual int placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool&);
+
+    void setHasBadParent();
+
+    int toAdd() const { return m_toAdd; }
+    
+public:
+    RenderObject* m_object;
+
+    int m_x;
+    int m_y;
+    int m_width;
+    int m_height;
+    int m_baseline;
+
+private:
+    InlineBox* m_next; // The next element on the same line as us.
+    InlineBox* m_prev; // The previous element on the same line as us.
+
+    InlineFlowBox* m_parent; // The box that contains us.
+    
+    // Some of these bits are actually for subclasses and moved here to compact the structures.
+
+    // for this class
+protected:
+    bool m_firstLine : 1;
+private:
+    bool m_constructed : 1;
+protected:
+    bool m_dirty : 1;
+    bool m_extracted : 1;
+
+    // for InlineFlowBox
+    bool m_includeLeftEdge : 1;
+    bool m_includeRightEdge : 1;
+    bool m_hasTextChildren : 1;
+
+    // for RootInlineBox
+    bool m_endsWithBreak : 1;  // Whether the line ends with a <br>.
+    bool m_hasSelectedChildren : 1; // Whether we have any children selected (this bit will also be set if the <br> that terminates our line is selected).
+    bool m_hasEllipsisBox : 1; 
+
+    // for InlineTextBox
+public:
+    bool m_reversed : 1;
+    bool m_dirOverride : 1;
+    bool m_treatAsText : 1; // Whether or not to treat a <br> as text for the purposes of line height.
+protected:
+    mutable bool m_determinedIfNextOnLineExists : 1;
+    mutable bool m_determinedIfPrevOnLineExists : 1;
+    mutable bool m_nextOnLineExists : 1;
+    mutable bool m_prevOnLineExists : 1;
+    int m_toAdd : 13; // for justified text
+
+#ifndef NDEBUG
+private:
+    bool m_hasBadParent;
+#endif
+};
+
+#ifdef NDEBUG
+inline InlineBox::~InlineBox()
+{
+}
+#endif
+
+inline void InlineBox::setHasBadParent()
+{
+#ifndef NDEBUG
+    m_hasBadParent = true;
+#endif
+}
+
+} // namespace WebCore
+
+#ifndef NDEBUG
+// Outside the WebCore namespace for ease of invocation from gdb.
+void showTree(const WebCore::InlineBox*);
+#endif
+
+#endif // InlineBox_h