/* * (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" #include namespace WebCore { class InlineTextBox; 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); enum ClippingOption { NoClipping, ClipToEllipsis }; void absoluteQuads(Vector&, ClippingOption option = NoClipping); 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 float width(unsigned from, unsigned len, const Font&, float xPos, HashSet* fallbackFonts = 0, GlyphOverflow* = 0) const; virtual float width(unsigned from, unsigned len, float xPos, bool firstLine = false, HashSet* fallbackFonts = 0, GlyphOverflow* = 0) const; float minLogicalWidth() const; float maxLogicalWidth() const; void trimmedPrefWidths(float leadWidth, float& beginMinW, bool& beginWS, float& endMinW, bool& endWS, bool& hasBreakableChar, bool& hasBreak, float& beginMaxW, float& endMaxW, float& minW, float& maxW, bool& stripFrontSpaces); virtual IntRect linesBoundingBox() const; IntRect linesVisualOverflowBoundingBox() const; FloatPoint firstRunOrigin() const; float firstRunX() const; float 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 computePreferredLogicalWidths(float leadWidth); bool isAllCollapsibleWhitespace(); bool knownToHaveNoOverflowAndNoFallbackFonts() const { return m_knownToHaveNoOverflowAndNoFallbackFonts; } void removeAndDestroyTextBoxes(); 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 computePreferredLogicalWidths(float 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; float widthFromCache(const Font&, int start, int len, float xPos, HashSet* fallbackFonts, GlyphOverflow*) const; bool isAllASCII() const { return m_isAllASCII; } void updateNeedsTranscoding(); inline void transformText(String&) const; float m_minWidth; // here to minimize padding in 64-bit. String m_text; InlineTextBox* m_firstTextBox; InlineTextBox* m_lastTextBox; float m_maxWidth; float m_beginMinWidth; float 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