WebCore/RenderTextControl.h

   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 FormControlElement;
  30 class Selection;
  31 class TextControlInnerElement;
  32 class TextControlInnerTextElement;
  33
  34 class RenderTextControl : public RenderBlock {
  35 public:
  36     virtual ~RenderTextControl();
  37
  38     virtual const char* renderName() const { return "RenderTextControl"; }
  39     virtual bool hasControlClip() const { return false; }
  40     virtual IntRect controlClipRect(int tx, int ty) const;
  41     virtual void calcHeight();
  42     virtual void calcPrefWidths();
  43     virtual void removeLeftoverAnonymousBlock(RenderBlock*) { }
  44     virtual void updateFromElement();
  45     virtual bool canHaveChildren() const { return false; }
  46     virtual bool avoidsFloats() const { return true; }
  47
  48     virtual bool isEdited() const { return m_edited; }
  49     virtual void setEdited(bool isEdited) { m_edited = isEdited; }
  50
  51     bool isUserEdited() const { return m_userEdited; }
  52     void setUserEdited(bool isUserEdited);
  53
  54     int selectionStart();
  55     int selectionEnd();
  56     void setSelectionStart(int);
  57     void setSelectionEnd(int);
  58     void select();
  59     void setSelectionRange(int start, int end);
  60     Selection selection(int start, int end) const;
  61
  62     virtual void subtreeHasChanged();
  63     String text();
  64     String textWithHardLineBreaks();
  65     void selectionChanged(bool userTriggered);
  66
  67     virtual void addFocusRingRects(GraphicsContext*, int tx, int ty);
  68
  69     virtual bool canBeProgramaticallyScrolled(bool) const { return true; }
  70     virtual void autoscroll();
  71
  72     // Subclassed to forward to our inner div.
  73     virtual int scrollLeft() const;
  74     virtual int scrollTop() const;
  75     virtual int scrollWidth() const;
  76     virtual int scrollHeight() const;
  77     virtual void setScrollLeft(int);
  78     virtual void setScrollTop(int);
  79     virtual bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1.0f);
  80
  81     bool canScroll() const;
  82
  83     // Returns the line height of the inner renderer.
  84     virtual int innerLineHeight() const;
  85
  86     VisiblePosition visiblePositionForIndex(int index);
  87     int indexForVisiblePosition(const VisiblePosition&);
  88
  89 protected:
  90     RenderTextControl(Node*);
  91
  92     int scrollbarThickness() const;
  93     void adjustInnerTextStyle(const RenderStyle* startStyle, RenderStyle* textBlockStyle) const;
  94     void setInnerTextValue(const String&);
  95
  96     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
  97
  98     void createSubtreeIfNeeded(TextControlInnerElement* innerBlock);
  99     void hitInnerTextElement(HitTestResult&, int x, int y, int tx, int ty);
 100     void forwardEvent(Event*);
 101
 102     int textBlockWidth() const;
 103     int textBlockHeight() const;
 104
 105     virtual int preferredContentWidth(float charWidth) const = 0;
 106     virtual void adjustControlHeightBasedOnLineHeight(int lineHeight) = 0;
 107     virtual void cacheSelection(int start, int end) = 0;
 108     virtual PassRefPtr<RenderStyle> createInnerTextStyle(const RenderStyle* startStyle) const = 0;
 109
 110     friend class TextIterator;
 111     HTMLElement* innerTextElement() const;
 112
 113     FormControlElement* formControlElement() const;
 114
 115 private:
 116     String finishText(Vector<UChar>&) const;
 117
 118     bool m_edited;
 119     bool m_userEdited;
 120     RefPtr<TextControlInnerTextElement> m_innerText;
 121 };
 122
 123 } // namespace WebCore
 124
 125 #endif // RenderTextControl_h