WebCore/editing/ApplyStyleCommand.h

   1 /*
   2  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef ApplyStyleCommand_h
  27 #define ApplyStyleCommand_h
  28
  29 #include "CompositeEditCommand.h"
  30
  31 namespace WebCore {
  32
  33 class HTMLElement;
  34 class StyleChange;
  35
  36 class ApplyStyleCommand : public CompositeEditCommand {
  37 public:
  38     enum EPropertyLevel { PropertyDefault, ForceBlockProperties };
  39
  40     static PassRefPtr<ApplyStyleCommand> create(Document* document, CSSStyleDeclaration* style, EditAction action = EditActionChangeAttributes, EPropertyLevel level = PropertyDefault)
  41     {
  42         return adoptRef(new ApplyStyleCommand(document, style, action, level));
  43     }
  44     static PassRefPtr<ApplyStyleCommand> create(Document* document, CSSStyleDeclaration* style, const Position& start, const Position& end, EditAction action = EditActionChangeAttributes, EPropertyLevel level = PropertyDefault)
  45     {
  46         return adoptRef(new ApplyStyleCommand(document, style, start, end, action, level));
  47     }
  48     static PassRefPtr<ApplyStyleCommand> create(Element* element, bool removeOnly = false, EditAction action = EditActionChangeAttributes)
  49     {
  50         return adoptRef(new ApplyStyleCommand(element, removeOnly, action));
  51     }
  52
  53 private:
  54     ApplyStyleCommand(Document*, CSSStyleDeclaration*, EditAction, EPropertyLevel);
  55     ApplyStyleCommand(Document*, CSSStyleDeclaration*, const Position& start, const Position& end, EditAction, EPropertyLevel);
  56     ApplyStyleCommand(Element*, bool removeOnly, EditAction);
  57
  58     virtual void doApply();
  59     virtual EditAction editingAction() const;
  60
  61     CSSMutableStyleDeclaration* style() const { return m_style.get(); }
  62
  63     // style-removal helpers
  64     bool isHTMLStyleNode(CSSMutableStyleDeclaration*, HTMLElement*);
  65     void removeHTMLStyleNode(HTMLElement*);
  66     void removeHTMLFontStyle(CSSMutableStyleDeclaration*, HTMLElement*);
  67     void removeCSSStyle(CSSMutableStyleDeclaration*, HTMLElement*);
  68     void removeBlockStyle(CSSMutableStyleDeclaration*, const Position& start, const Position& end);
  69     void removeInlineStyle(PassRefPtr<CSSMutableStyleDeclaration>, const Position& start, const Position& end);
  70     bool nodeFullySelected(Node*, const Position& start, const Position& end) const;
  71     bool nodeFullyUnselected(Node*, const Position& start, const Position& end) const;
  72     PassRefPtr<CSSMutableStyleDeclaration> extractTextDecorationStyle(Node*);
  73     PassRefPtr<CSSMutableStyleDeclaration> extractAndNegateTextDecorationStyle(Node*);
  74     void applyTextDecorationStyle(Node*, CSSMutableStyleDeclaration *style);
  75     void pushDownTextDecorationStyleAroundNode(Node*, const Position& start, const Position& end, bool force);
  76     void pushDownTextDecorationStyleAtBoundaries(const Position& start, const Position& end);
  77
  78     // style-application helpers
  79     void applyBlockStyle(CSSMutableStyleDeclaration*);
  80     void applyRelativeFontStyleChange(CSSMutableStyleDeclaration*);
  81     void applyInlineStyle(CSSMutableStyleDeclaration*);
  82     void addBlockStyle(const StyleChange&, HTMLElement*);
  83     void addInlineStyleIfNeeded(CSSMutableStyleDeclaration*, Node* start, Node* end);
  84     bool splitTextAtStartIfNeeded(const Position& start, const Position& end);
  85     bool splitTextAtEndIfNeeded(const Position& start, const Position& end);
  86     bool splitTextElementAtStartIfNeeded(const Position& start, const Position& end);
  87     bool splitTextElementAtEndIfNeeded(const Position& start, const Position& end);
  88     bool mergeStartWithPreviousIfIdentical(const Position& start, const Position& end);
  89     bool mergeEndWithNextIfIdentical(const Position& start, const Position& end);
  90     void cleanupUnstyledAppleStyleSpans(Node* dummySpanAncestor);
  91
  92     void surroundNodeRangeWithElement(Node* start, Node* end, Element* element);
  93     float computedFontSize(const Node*);
  94     void joinChildTextNodes(Node*, const Position& start, const Position& end);
  95
  96     void updateStartEnd(const Position& newStart, const Position& newEnd);
  97     Position startPosition();
  98     Position endPosition();
  99
 100     RefPtr<CSSMutableStyleDeclaration> m_style;
 101     EditAction m_editingAction;
 102     EPropertyLevel m_propertyLevel;
 103     Position m_start;
 104     Position m_end;
 105     bool m_useEndingSelection;
 106     RefPtr<Element> m_styledInlineElement;
 107     bool m_removeOnly;
 108 };
 109
 110 bool isStyleSpan(const Node*);
 111 PassRefPtr<HTMLElement> createStyleSpanElement(Document*);
 112
 113 } // namespace WebCore
 114
 115 #endif