Source/WebCore/rendering/RenderTextLineBoxes.h

/*
 * Copyright (C) 2013 Apple 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:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "LayoutRect.h"
#include "RenderObject.h"
#include "VisiblePosition.h"

namespace WebCore {

class InlineTextBox;
class RenderStyle;
class RenderText;

class RenderTextLineBoxes {
public:
    RenderTextLineBoxes();

    InlineTextBox* first() const { return m_first; }
    InlineTextBox* last() const { return m_last; }

    InlineTextBox* createAndAppendLineBox(RenderText&);

    void extract(InlineTextBox&);
    void attach(InlineTextBox&);
    void remove(InlineTextBox&);

    void removeAllFromParent(RenderText&);
    void deleteAll();

    void dirtyAll();
    bool dirtyRange(RenderText&, unsigned start, unsigned end, int lengthDelta);

    InlineTextBox* findNext(int offset, int& position) const;

    VisiblePosition positionForPoint(const RenderText&, const LayoutPoint&) const;

    void setSelectionState(RenderText&, RenderObject::SelectionState);
    LayoutRect selectionRectForRange(unsigned start, unsigned end);
    void collectSelectionRectsForRange(unsigned start, unsigned end, Vector<LayoutRect>& rects);

    LayoutRect visualOverflowBoundingBox(const RenderText&) const;

    enum ClippingOption { NoClipping, ClipToEllipsis };
    Vector<FloatQuad> absoluteQuads(const RenderText&, bool* wasFixed, ClippingOption) const;
    Vector<FloatQuad> absoluteQuadsForRange(const RenderText&, unsigned start, unsigned end, bool useSelectionHeight, bool ignoreEmptyTextSelections, bool* wasFixed) const;
    Vector<IntRect> absoluteRectsForRange(const RenderText&, unsigned start, unsigned end, bool useSelectionHeight, bool* wasFixed) const;

#if ASSERT_ENABLED
    ~RenderTextLineBoxes();
#endif

#if !ASSERT_WITH_SECURITY_IMPLICATION_DISABLED
    void invalidateParentChildLists();
#endif

private:
    void checkConsistency() const;

    InlineTextBox* m_first;
    InlineTextBox* m_last;
};

} // namespace WebCore