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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef AbstractInlineTextBox_h
#define AbstractInlineTextBox_h
#include "core/dom/Range.h"
#include "core/rendering/InlineTextBox.h"
#include "core/rendering/RenderText.h"
#include "wtf/HashMap.h"
#include "wtf/RefPtr.h"
namespace blink {
class InlineTextBox;
// High-level abstraction of InlineTextBox to allow the accessibility module to
// get information about InlineTextBoxes without tight coupling.
class AbstractInlineTextBox : public RefCounted<AbstractInlineTextBox> {
private:
AbstractInlineTextBox(RenderText* renderText, InlineTextBox* inlineTextBox)
: m_renderText(renderText)
, m_inlineTextBox(inlineTextBox)
{
}
static PassRefPtr<AbstractInlineTextBox> getOrCreate(RenderText*, InlineTextBox*);
static void willDestroy(InlineTextBox*);
friend class RenderText;
friend class InlineTextBox;
public:
struct WordBoundaries {
WordBoundaries(int startIndex, int endIndex) : startIndex(startIndex), endIndex(endIndex) { }
int startIndex;
int endIndex;
};
enum Direction {
LeftToRight,
RightToLeft,
TopToBottom,
BottomToTop
};
RenderText* renderText() const { return m_renderText; }
PassRefPtr<AbstractInlineTextBox> nextInlineTextBox() const;
LayoutRect bounds() const;
unsigned len() const;
Direction direction() const;
void characterWidths(Vector<float>&) const;
void wordBoundaries(Vector<WordBoundaries>&) const;
String text() const;
private:
void detach();
// Weak ptrs; these are nulled when InlineTextBox::destroy() calls AbstractInlineTextBox::willDestroy.
RenderText* m_renderText;
InlineTextBox* m_inlineTextBox;
typedef HashMap<InlineTextBox*, RefPtr<AbstractInlineTextBox> > InlineToAbstractInlineTextBoxHashMap;
static InlineToAbstractInlineTextBoxHashMap* gAbstractInlineTextBoxMap;
};
} // namespace blink
#endif // AbstractInlineTextBox_h