--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/InlineBox.h Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,326 @@
+/*
+ * 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 "RenderBoxModelObject.h"
+#include "TextDirection.h"
+
+namespace WebCore {
+
+class HitTestRequest;
+class HitTestResult;
+class RootInlineBox;
+
+
+// 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_next(0)
+ , m_prev(0)
+ , m_parent(0)
+ , m_renderer(obj)
+ , m_x(0)
+ , m_y(0)
+ , m_width(0)
+ , m_firstLine(false)
+ , m_constructed(false)
+ , m_bidiEmbeddingLevel(0)
+ , m_dirty(false)
+ , m_extracted(false)
+#if ENABLE(SVG)
+ , m_hasVirtualHeight(false)
+#endif
+ , m_endsWithBreak(false)
+ , m_hasSelectedChildren(false)
+ , m_hasEllipsisBoxOrHyphen(false)
+ , m_dirOverride(false)
+ , m_isText(false)
+ , 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, bool firstLine, bool constructed,
+ bool dirty, bool extracted, InlineBox* next, InlineBox* prev, InlineFlowBox* parent)
+ : m_next(next)
+ , m_prev(prev)
+ , m_parent(parent)
+ , m_renderer(obj)
+ , m_x(x)
+ , m_y(y)
+ , m_width(width)
+ , m_firstLine(firstLine)
+ , m_constructed(constructed)
+ , m_bidiEmbeddingLevel(0)
+ , m_dirty(dirty)
+ , m_extracted(extracted)
+#if ENABLE(SVG)
+ , m_hasVirtualHeight(false)
+#endif
+ , m_endsWithBreak(false)
+ , m_hasSelectedChildren(false)
+ , m_hasEllipsisBoxOrHyphen(false)
+ , m_dirOverride(false)
+ , m_isText(false)
+ , 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(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
+
+ bool isText() const { return m_isText; }
+ void setIsText(bool b) { m_isText = b; }
+
+ virtual bool isInlineFlowBox() const { return false; }
+ virtual bool isInlineTextBox() const { return false; }
+ virtual bool isRootInlineBox() const { return false; }
+#if ENABLE(SVG)
+ virtual bool isSVGInlineTextBox() const { return false; }
+ virtual bool isSVGRootInlineBox() const { return false; }
+
+ bool hasVirtualHeight() const { return m_hasVirtualHeight; }
+ void setHasVirtualHeight() { m_hasVirtualHeight = true; }
+ virtual int virtualHeight() const
+ {
+ ASSERT_NOT_REACHED();
+ return 0;
+ }
+#endif
+
+ virtual IntRect calculateBoundaries() const
+ {
+ ASSERT_NOT_REACHED();
+ return IntRect();
+ }
+
+ 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 bool isLeaf() const { return true; }
+
+ InlineBox* nextLeafChild() const;
+ InlineBox* prevLeafChild() const;
+
+ RenderObject* renderer() const { return m_renderer; }
+
+ InlineFlowBox* parent() const
+ {
+ ASSERT(!m_hasBadParent);
+ return m_parent;
+ }
+ void setParent(InlineFlowBox* par) { m_parent = par; }
+
+ const RootInlineBox* root() const;
+ RootInlineBox* root();
+
+ void setWidth(int w) { m_width = w; }
+ int width() const { return m_width; }
+
+ // x() is the left side of the box in the parent's coordinate system.
+ void setX(int x) { m_x = x; }
+ int x() const { return m_x; }
+
+ // y() is the top of the box in the parent's coordinate system.
+ void setY(int y) { m_y = y; }
+ int y() const { return m_y; }
+
+ int height() const;
+
+ inline int baselinePosition(bool isRootLineBox) const { return renderer()->baselinePosition(m_firstLine, isRootLineBox); }
+ inline int lineHeight(bool isRootLineBox) const { return renderer()->lineHeight(m_firstLine, isRootLineBox); }
+
+ virtual int caretMinOffset() const;
+ virtual int caretMaxOffset() const;
+ virtual unsigned caretMaxRenderedOffset() const;
+
+ unsigned char bidiLevel() const { return m_bidiEmbeddingLevel; }
+ void setBidiLevel(unsigned char level) { m_bidiEmbeddingLevel = level; }
+ TextDirection direction() const { return m_bidiEmbeddingLevel % 2 ? RTL : LTR; }
+ int caretLeftmostOffset() const { return direction() == LTR ? caretMinOffset() : caretMaxOffset(); }
+ int caretRightmostOffset() const { return direction() == LTR ? caretMaxOffset() : caretMinOffset(); }
+
+ 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);
+ // visibleLeftEdge, visibleRightEdge are in the parent's coordinate system.
+ virtual int placeEllipsisBox(bool ltr, int visibleLeftEdge, int visibleRightEdge, int ellipsisWidth, bool&);
+
+ void setHasBadParent();
+
+ int toAdd() const { return m_toAdd; }
+
+ bool visibleToHitTesting() const { return renderer()->style()->visibility() == VISIBLE && renderer()->style()->pointerEvents() != PE_NONE; }
+
+ // Use with caution! The type is not checked!
+ RenderBoxModelObject* boxModelObject() const
+ {
+ if (!m_renderer->isText())
+ return toRenderBoxModelObject(m_renderer);
+ return 0;
+ }
+
+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.
+
+public:
+ RenderObject* m_renderer;
+
+ int m_x;
+ int m_y;
+ int m_width;
+
+ // 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;
+ unsigned char m_bidiEmbeddingLevel : 6;
+protected:
+ bool m_dirty : 1;
+ bool m_extracted : 1;
+ bool m_hasVirtualHeight : 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_hasEllipsisBoxOrHyphen : 1;
+
+ // for InlineTextBox
+public:
+ bool m_dirOverride : 1;
+ bool m_isText : 1; // Whether or not this object represents text with a non-zero height. Includes non-image list markers, text boxes.
+protected:
+ mutable bool m_determinedIfNextOnLineExists : 1;
+ mutable bool m_determinedIfPrevOnLineExists : 1;
+ mutable bool m_nextOnLineExists : 1;
+ mutable bool m_prevOnLineExists : 1;
+ int m_toAdd : 12; // 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