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 27namespace WebCore { 28 29class VisibleSelection; 30class TextControlInnerElement; 31class TextControlInnerTextElement; 32 33class RenderTextControl : public RenderBlock { 34public: 35 virtual ~RenderTextControl(); 36 37 HTMLElement* innerTextElement() const; 38 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 56protected: 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 87private: 88 virtual const char* renderName() const { return "RenderTextControl"; } 89 virtual bool isTextControl() const { return true; } 90 virtual void computePreferredLogicalWidths(); 91 virtual void removeLeftoverAnonymousBlock(RenderBlock*) { } 92 virtual bool canHaveChildren() const { return false; } 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 99 virtual bool canBeProgramaticallyScrolled(bool) const { return true; } 100 101 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 119void setSelectionRange(Node*, int start, int end); 120 121inline RenderTextControl* toRenderTextControl(RenderObject* object) 122{ 123 ASSERT(!object || object->isTextControl()); 124 return static_cast<RenderTextControl*>(object); 125} 126 127inline 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. 134void toRenderTextControl(const RenderTextControl*); 135 136} // namespace WebCore 137 138#endif // RenderTextControl_h 139