1 /*
2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
3 * (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22 #ifndef RenderTextControl_h
23 #define RenderTextControl_h
24
25 #include "RenderBlock.h"
26
27 namespace WebCore {
28
29 class VisibleSelection;
30 class TextControlInnerElement;
31 class TextControlInnerTextElement;
32
33 class RenderTextControl : public RenderBlock {
34 public:
35 virtual ~RenderTextControl();
36
37 HTMLElement* innerTextElement() const;
38
lastChangeWasUserEdit()39 bool lastChangeWasUserEdit() const { return m_lastChangeWasUserEdit; }
40 void setLastChangeWasUserEdit(bool lastChangeWasUserEdit);
41
42 int selectionStart() const;
43 int selectionEnd() const;
44 PassRefPtr<Range> selection(int start, int end) const;
45
46 virtual void subtreeHasChanged();
47 String text();
48 String textWithHardLineBreaks();
49 void selectionChanged(bool userTriggered);
50
51 VisiblePosition visiblePositionForIndex(int index) const;
52 static int indexForVisiblePosition(HTMLElement*, const VisiblePosition&);
53
54 void updatePlaceholderVisibility(bool, bool);
55
56 protected:
57 RenderTextControl(Node*, bool);
58
59 int scrollbarThickness() const;
60 void adjustInnerTextStyle(const RenderStyle* startStyle, RenderStyle* textBlockStyle) const;
61 void setInnerTextValue(const String&);
62
63 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
64
65 void createSubtreeIfNeeded(TextControlInnerElement* innerBlock);
66 void hitInnerTextElement(HitTestResult&, int x, int y, int tx, int ty);
67 void forwardEvent(Event*);
68
69 int textBlockWidth() const;
70 int textBlockHeight() const;
71
72 float scaleEmToUnits(int x) const;
73
74 static bool hasValidAvgCharWidth(AtomicString family);
75 virtual float getAvgCharWidth(AtomicString family);
76 virtual int preferredContentWidth(float charWidth) const = 0;
77 virtual void adjustControlHeightBasedOnLineHeight(int lineHeight) = 0;
78 virtual void cacheSelection(int start, int end) = 0;
79 virtual PassRefPtr<RenderStyle> createInnerTextStyle(const RenderStyle* startStyle) const = 0;
80 virtual RenderStyle* textBaseStyle() const = 0;
81
82 virtual void updateFromElement();
83 virtual void computeLogicalHeight();
84
85 bool m_placeholderVisible;
86
87 private:
renderName()88 virtual const char* renderName() const { return "RenderTextControl"; }
isTextControl()89 virtual bool isTextControl() const { return true; }
90 virtual void computePreferredLogicalWidths();
removeLeftoverAnonymousBlock(RenderBlock *)91 virtual void removeLeftoverAnonymousBlock(RenderBlock*) { }
canHaveChildren()92 virtual bool canHaveChildren() const { return false; }
avoidsFloats()93 virtual bool avoidsFloats() const { return true; }
94 void setInnerTextStyle(PassRefPtr<RenderStyle>);
95 virtual void paintObject(PaintInfo&, int tx, int ty);
96
97 virtual void addFocusRingRects(Vector<IntRect>&, int tx, int ty);
98
canBeProgramaticallyScrolled(bool)99 virtual bool canBeProgramaticallyScrolled(bool) const { return true; }
100
requiresForcedStyleRecalcPropagation()101 virtual bool requiresForcedStyleRecalcPropagation() const { return true; }
102
103 String finishText(Vector<UChar>&) const;
104
105 bool hasVisibleTextArea() const;
106 friend void setSelectionRange(Node*, int start, int end);
107 static bool isSelectableElement(HTMLElement*, Node*);
108
109 virtual int textBlockInsetLeft() const = 0;
110 virtual int textBlockInsetRight() const = 0;
111 virtual int textBlockInsetTop() const = 0;
112
113 void paintPlaceholder(PaintInfo&, int tx, int ty);
114
115 bool m_lastChangeWasUserEdit;
116 RefPtr<TextControlInnerTextElement> m_innerText;
117 };
118
119 void setSelectionRange(Node*, int start, int end);
120
toRenderTextControl(RenderObject * object)121 inline RenderTextControl* toRenderTextControl(RenderObject* object)
122 {
123 ASSERT(!object || object->isTextControl());
124 return static_cast<RenderTextControl*>(object);
125 }
126
toRenderTextControl(const RenderObject * object)127 inline const RenderTextControl* toRenderTextControl(const RenderObject* object)
128 {
129 ASSERT(!object || object->isTextControl());
130 return static_cast<const RenderTextControl*>(object);
131 }
132
133 // This will catch anyone doing an unnecessary cast.
134 void toRenderTextControl(const RenderTextControl*);
135
136 } // namespace WebCore
137
138 #endif // RenderTextControl_h
139