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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,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef AbstractInlineTextBox_h
#define AbstractInlineTextBox_h
#include "core/CoreExport.h"
#include "core/dom/Range.h"
#include "core/layout/api/LineLayoutText.h"
#include "core/layout/line/InlineTextBox.h"
#include "wtf/HashMap.h"
#include "wtf/RefCounted.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 CORE_EXPORT AbstractInlineTextBox
: public RefCounted<AbstractInlineTextBox> {
private:
AbstractInlineTextBox(LineLayoutText lineLayoutItem,
InlineTextBox* inlineTextBox)
: m_lineLayoutItem(lineLayoutItem), m_inlineTextBox(inlineTextBox) {}
static PassRefPtr<AbstractInlineTextBox> getOrCreate(LineLayoutText,
InlineTextBox*);
static void willDestroy(InlineTextBox*);
friend class LayoutText;
friend class InlineTextBox;
public:
struct WordBoundaries {
DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
WordBoundaries(int startIndex, int endIndex)
: startIndex(startIndex), endIndex(endIndex) {}
int startIndex;
int endIndex;
};
enum Direction { LeftToRight, RightToLeft, TopToBottom, BottomToTop };
~AbstractInlineTextBox();
LineLayoutText getLineLayoutItem() const { return m_lineLayoutItem; }
PassRefPtr<AbstractInlineTextBox> nextInlineTextBox() const;
LayoutRect localBounds() const;
unsigned len() const;
Direction getDirection() const;
void characterWidths(Vector<float>&) const;
void wordBoundaries(Vector<WordBoundaries>&) const;
String text() const;
bool isFirst() const;
bool isLast() const;
PassRefPtr<AbstractInlineTextBox> nextOnLine() const;
PassRefPtr<AbstractInlineTextBox> previousOnLine() const;
private:
void detach();
// Weak ptrs; these are nulled when InlineTextBox::destroy() calls
// AbstractInlineTextBox::willDestroy.
LineLayoutText m_lineLayoutItem;
InlineTextBox* m_inlineTextBox;
typedef HashMap<InlineTextBox*, RefPtr<AbstractInlineTextBox>>
InlineToAbstractInlineTextBoxHashMap;
static InlineToAbstractInlineTextBoxHashMap* gAbstractInlineTextBoxMap;
};
} // namespace blink
#endif // AbstractInlineTextBox_h
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