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/*
* Copyright (C) 2011 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.
*/
#pragma once
#include "InlineBox.h"
#include "TextAffinity.h"
namespace WebCore {
class LayoutUnit;
class Position;
class RenderObject;
class VisiblePosition;
class RenderedPosition {
public:
RenderedPosition();
explicit RenderedPosition(const VisiblePosition&);
explicit RenderedPosition(const Position&, EAffinity);
bool isEquivalent(const RenderedPosition&) const;
bool isNull() const { return !m_renderer; }
RootInlineBox* rootBox() { return m_inlineBox ? &m_inlineBox->root() : 0; }
unsigned char bidiLevelOnLeft() const;
unsigned char bidiLevelOnRight() const;
RenderedPosition leftBoundaryOfBidiRun(unsigned char bidiLevelOfRun);
RenderedPosition rightBoundaryOfBidiRun(unsigned char bidiLevelOfRun);
enum ShouldMatchBidiLevel { MatchBidiLevel, IgnoreBidiLevel };
bool atLeftBoundaryOfBidiRun() const { return atLeftBoundaryOfBidiRun(IgnoreBidiLevel, 0); }
bool atRightBoundaryOfBidiRun() const { return atRightBoundaryOfBidiRun(IgnoreBidiLevel, 0); }
// The following two functions return true only if the current position is at the end of the bidi run
// of the specified bidi embedding level.
bool atLeftBoundaryOfBidiRun(unsigned char bidiLevelOfRun) const { return atLeftBoundaryOfBidiRun(MatchBidiLevel, bidiLevelOfRun); }
bool atRightBoundaryOfBidiRun(unsigned char bidiLevelOfRun) const { return atRightBoundaryOfBidiRun(MatchBidiLevel, bidiLevelOfRun); }
Position positionAtLeftBoundaryOfBiDiRun() const;
Position positionAtRightBoundaryOfBiDiRun() const;
IntRect absoluteRect(LayoutUnit* extraWidthToEndOfLine = nullptr) const;
private:
bool operator==(const RenderedPosition&) const { return false; }
explicit RenderedPosition(RenderObject*, InlineBox*, int offset);
InlineBox* prevLeafChild() const;
InlineBox* nextLeafChild() const;
bool atLeftmostOffsetInBox() const { return m_inlineBox && m_offset == m_inlineBox->caretLeftmostOffset(); }
bool atRightmostOffsetInBox() const { return m_inlineBox && m_offset == m_inlineBox->caretRightmostOffset(); }
bool atLeftBoundaryOfBidiRun(ShouldMatchBidiLevel, unsigned char bidiLevelOfRun) const;
bool atRightBoundaryOfBidiRun(ShouldMatchBidiLevel, unsigned char bidiLevelOfRun) const;
RenderObject* m_renderer { nullptr };
InlineBox* m_inlineBox { nullptr };
int m_offset;
static InlineBox* uncachedInlineBox() { return reinterpret_cast<InlineBox*>(1); }
// Needs to be different form 0 so pick 1 because it's also on the null page.
mutable InlineBox* m_prevLeafChild;
mutable InlineBox* m_nextLeafChild;
};
inline RenderedPosition::RenderedPosition()
: m_offset(0)
, m_prevLeafChild(uncachedInlineBox())
, m_nextLeafChild(uncachedInlineBox())
{
}
inline RenderedPosition::RenderedPosition(RenderObject* renderer, InlineBox* box, int offset)
: m_renderer(renderer)
, m_inlineBox(box)
, m_offset(offset)
, m_prevLeafChild(uncachedInlineBox())
, m_nextLeafChild(uncachedInlineBox())
{
}
bool renderObjectContainsPosition(RenderObject*, const Position&);
} // namespace WebCore