diff -r 000000000000 -r 4f2f89ce4247 WebCore/rendering/RenderText.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/WebCore/rendering/RenderText.h Fri Sep 17 09:02:29 2010 +0300 @@ -0,0 +1,205 @@ +/* + * (C) 1999 Lars Knoll (knoll@kde.org) + * (C) 2000 Dirk Mueller (mueller@kde.org) + * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 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 RenderText_h +#define RenderText_h + +#include "RenderObject.h" + +namespace WebCore { + +class InlineTextBox; +class StringImpl; + +class RenderText : public RenderObject { +public: + RenderText(Node*, PassRefPtr); +#ifndef NDEBUG + virtual ~RenderText(); +#endif + + virtual const char* renderName() const; + + virtual bool isTextFragment() const; + virtual bool isWordBreak() const; + + virtual PassRefPtr originalText() const; + + void extractTextBox(InlineTextBox*); + void attachTextBox(InlineTextBox*); + void removeTextBox(InlineTextBox*); + + virtual void destroy(); + + StringImpl* text() const { return m_text.impl(); } + String textWithoutTranscoding() const; + + InlineTextBox* createInlineTextBox(); + void dirtyLineBoxes(bool fullLayout); + + virtual void absoluteRects(Vector&, int tx, int ty); + void absoluteRectsForRange(Vector&, unsigned startOffset = 0, unsigned endOffset = UINT_MAX, bool useSelectionHeight = false); + + virtual void absoluteQuads(Vector&); + void absoluteQuadsForRange(Vector&, unsigned startOffset = 0, unsigned endOffset = UINT_MAX, bool useSelectionHeight = false); + + virtual VisiblePosition positionForPoint(const IntPoint&); + + const UChar* characters() const { return m_text.characters(); } + unsigned textLength() const { return m_text.length(); } // non virtual implementation of length() + void positionLineBox(InlineBox*); + + virtual unsigned width(unsigned from, unsigned len, const Font&, int xPos, HashSet* fallbackFonts = 0, GlyphOverflow* = 0) const; + virtual unsigned width(unsigned from, unsigned len, int xPos, bool firstLine = false, HashSet* fallbackFonts = 0, GlyphOverflow* = 0) const; + + virtual int lineHeight(bool firstLine, bool isRootLineBox = false) const; + + virtual int minPrefWidth() const; + virtual int maxPrefWidth() const; + + void trimmedPrefWidths(int leadWidth, + int& beginMinW, bool& beginWS, + int& endMinW, bool& endWS, + bool& hasBreakableChar, bool& hasBreak, + int& beginMaxW, int& endMaxW, + int& minW, int& maxW, bool& stripFrontSpaces); + + IntRect linesBoundingBox() const; + + IntPoint firstRunOrigin() const; + int firstRunX() const; + int firstRunY() const; + + void setText(PassRefPtr, bool force = false); + void setTextWithOffset(PassRefPtr, unsigned offset, unsigned len, bool force = false); + + virtual bool canBeSelectionLeaf() const { return true; } + virtual void setSelectionState(SelectionState s); + virtual IntRect selectionRectForRepaint(RenderBoxModelObject* repaintContainer, bool clipToVisibleContent = true); + virtual IntRect localCaretRect(InlineBox*, int caretOffset, int* extraWidthToEndOfLine = 0); + + virtual int marginLeft() const { return style()->marginLeft().calcMinValue(0); } + virtual int marginRight() const { return style()->marginRight().calcMinValue(0); } + + virtual IntRect clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer); + + InlineTextBox* firstTextBox() const { return m_firstTextBox; } + InlineTextBox* lastTextBox() const { return m_lastTextBox; } + + virtual int caretMinOffset() const; + virtual int caretMaxOffset() const; + virtual unsigned caretMaxRenderedOffset() const; + + virtual int previousOffset(int current) const; + virtual int previousOffsetForBackwardDeletion(int current) const; + virtual int nextOffset(int current) const; + + bool containsReversedText() const { return m_containsReversedText; } + + InlineTextBox* findNextInlineTextBox(int offset, int& pos) const; + + bool allowTabs() const { return !style()->collapseWhiteSpace(); } + + void checkConsistency() const; + + virtual void calcPrefWidths(int leadWidth); + bool isAllCollapsibleWhitespace(); + +protected: + virtual void styleWillChange(StyleDifference, const RenderStyle*) { } + virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); + + virtual void setTextInternal(PassRefPtr); + virtual UChar previousCharacter() const; + + virtual InlineTextBox* createTextBox(); // Subclassed by SVG. + +private: + void calcPrefWidths(int leadWidth, HashSet& fallbackFonts, GlyphOverflow&); + + // Make length() private so that callers that have a RenderText* + // will use the more efficient textLength() instead, while + // callers with a RenderObject* can continue to use length(). + virtual unsigned length() const { return textLength(); } + + virtual void paint(PaintInfo&, int, int) { ASSERT_NOT_REACHED(); } + virtual void layout() { ASSERT_NOT_REACHED(); } + virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int, int, int, int, HitTestAction) { ASSERT_NOT_REACHED(); return false; } + + void deleteTextBoxes(); + bool containsOnlyWhitespace(unsigned from, unsigned len) const; + int widthFromCache(const Font&, int start, int len, int xPos, HashSet* fallbackFonts, GlyphOverflow*) const; + bool isAllASCII() const { return m_isAllASCII; } + void updateNeedsTranscoding(); + + inline void transformText(String&) const; + + int m_minWidth; // here to minimize padding in 64-bit. + + String m_text; + + InlineTextBox* m_firstTextBox; + InlineTextBox* m_lastTextBox; + + int m_maxWidth; + int m_beginMinWidth; + int m_endMinWidth; + + bool m_hasBreakableChar : 1; // Whether or not we can be broken into multiple lines. + bool m_hasBreak : 1; // Whether or not we have a hard break (e.g., 
 with '\n').
+    bool m_hasTab : 1; // Whether or not we have a variable width tab character (e.g., 
 with '\t').
+    bool m_hasBeginWS : 1; // Whether or not we begin with WS (only true if we aren't pre)
+    bool m_hasEndWS : 1; // Whether or not we end with WS (only true if we aren't pre)
+    bool m_linesDirty : 1; // This bit indicates that the text run has already dirtied specific
+                           // line boxes, and this hint will enable layoutInlineChildren to avoid
+                           // just dirtying everything when character data is modified (e.g., appended/inserted
+                           // or removed).
+    bool m_containsReversedText : 1;
+    bool m_isAllASCII : 1;
+    mutable bool m_knownToHaveNoOverflowAndNoFallbackFonts : 1;
+    bool m_needsTranscoding : 1;
+};
+
+inline RenderText* toRenderText(RenderObject* object)
+{ 
+    ASSERT(!object || object->isText());
+    return static_cast(object);
+}
+
+inline const RenderText* toRenderText(const RenderObject* object)
+{ 
+    ASSERT(!object || object->isText());
+    return static_cast(object);
+}
+
+// This will catch anyone doing an unnecessary cast.
+void toRenderText(const RenderText*);
+
+#ifdef NDEBUG
+inline void RenderText::checkConsistency() const
+{
+}
+#endif
+
+} // namespace WebCore
+
+#endif // RenderText_h