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Merge WebKit at r78450: Initial merge by git.
[android-x86/external-webkit.git] / Source / WebCore / editing / EditingStyle.h
1 /*
2  * Copyright (C) 2010 Google 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 are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30
31 #ifndef EditingStyle_h
32 #define EditingStyle_h
33
34 #include "WritingDirection.h"
35 #include <wtf/RefCounted.h>
36 #include <wtf/RefPtr.h>
37
38 namespace WebCore {
39
40 class CSSStyleDeclaration;
41 class CSSComputedStyleDeclaration;
42 class CSSMutableStyleDeclaration;
43 class Node;
44 class Position;
45 class RenderStyle;
46
47 class EditingStyle : public RefCounted<EditingStyle> {
48 public:
49
50     enum PropertiesToInclude { AllProperties, OnlyInheritableProperties };
51     enum ShouldPreserveWritingDirection { PreserveWritingDirection, DoNotPreserveWritingDirection };
52     static float NoFontDelta;
53
54     static PassRefPtr<EditingStyle> create()
55     {
56         return adoptRef(new EditingStyle());
57     }
58
59     static PassRefPtr<EditingStyle> create(Node* node, PropertiesToInclude propertiesToInclude = OnlyInheritableProperties)
60     {
61         return adoptRef(new EditingStyle(node, propertiesToInclude));
62     }
63
64     static PassRefPtr<EditingStyle> create(const Position& position)
65     {
66         return adoptRef(new EditingStyle(position));
67     }
68
69     static PassRefPtr<EditingStyle> create(const CSSStyleDeclaration* style)
70     {
71         return adoptRef(new EditingStyle(style));
72     }
73
74     ~EditingStyle();
75
76     CSSMutableStyleDeclaration* style() { return m_mutableStyle.get(); }
77     bool textDirection(WritingDirection&) const;
78     bool isEmpty() const;
79     void setStyle(PassRefPtr<CSSMutableStyleDeclaration>);
80     void overrideWithStyle(const CSSMutableStyleDeclaration*);
81     void clear();
82     PassRefPtr<EditingStyle> copy() const;
83     PassRefPtr<EditingStyle> extractAndRemoveBlockProperties();
84     PassRefPtr<EditingStyle> extractAndRemoveTextDirection();
85     void removeBlockProperties();
86     void removeStyleAddedByNode(Node*);
87     void removeStyleConflictingWithStyleOfNode(Node*);
88     void removeNonEditingProperties();
89     void prepareToApplyAt(const Position&, ShouldPreserveWritingDirection = DoNotPreserveWritingDirection);
90
91     float fontSizeDelta() const { return m_fontSizeDelta; }
92     bool hasFontSizeDelta() const { return m_fontSizeDelta != NoFontDelta; }
93
94 private:
95     EditingStyle();
96     EditingStyle(Node*, PropertiesToInclude);
97     EditingStyle(const Position&);
98     EditingStyle(const CSSStyleDeclaration*);
99     void init(Node*, PropertiesToInclude);
100     void removeTextFillAndStrokeColorsIfNeeded(RenderStyle*);
101     void replaceFontSizeByKeywordIfPossible(RenderStyle*, CSSComputedStyleDeclaration*);
102     void extractFontSizeDelta();
103
104     RefPtr<CSSMutableStyleDeclaration> m_mutableStyle;
105     bool m_shouldUseFixedDefaultFontSize;
106     float m_fontSizeDelta;
107 };
108
109 PassRefPtr<EditingStyle> editingStyleIncludingTypingStyle(const Position&);
110     
111 } // namespace WebCore
112
113 #endif // EditingStyle_h