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/*
* 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.
*/
#ifndef SimpleLineLayoutFunctions_h
#define SimpleLineLayoutFunctions_h
#include "LayoutRect.h"
#include "RenderBlockFlow.h"
#include "RenderText.h"
#include <wtf/text/WTFString.h>
namespace WebCore {
class HitTestLocation;
class HitTestRequest;
class HitTestResult;
class RenderBlockFlow;
struct PaintInfo;
namespace SimpleLineLayout {
LayoutUnit computeFlowHeight(const RenderBlockFlow&, const Layout&);
LayoutUnit computeFlowFirstLineBaseline(const RenderBlockFlow&, const Layout&);
LayoutUnit computeFlowLastLineBaseline(const RenderBlockFlow&, const Layout&);
void paintFlow(const RenderBlockFlow&, const Layout&, PaintInfo&, const LayoutPoint& paintOffset);
bool hitTestFlow(const RenderBlockFlow&, const Layout&, const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction);
void collectFlowOverflow(RenderBlockFlow&, const Layout&);
bool isTextRendered(const RenderText&, const Layout&);
bool containsCaretOffset(const RenderObject&, const Layout&, unsigned);
unsigned findCaretMinimumOffset(const RenderObject&, const Layout&);
unsigned findCaretMaximumOffset(const RenderObject&, const Layout&);
IntRect computeBoundingBox(const RenderObject&, const Layout&);
IntPoint computeFirstRunLocation(const RenderObject&, const Layout&);
Vector<IntRect> collectAbsoluteRects(const RenderObject&, const Layout&, const LayoutPoint& accumulatedOffset);
Vector<FloatQuad> collectAbsoluteQuads(const RenderObject&, const Layout&, bool* wasFixed);
LayoutUnit lineHeightFromFlow(const RenderBlockFlow&);
LayoutUnit baselineFromFlow(const RenderBlockFlow&);
#if ENABLE(TREE_DEBUGGING)
void showLineLayoutForFlow(const RenderBlockFlow&, const Layout&, int depth);
#endif
}
namespace SimpleLineLayout {
inline LayoutUnit computeFlowHeight(const RenderBlockFlow& flow, const Layout& layout)
{
return lineHeightFromFlow(flow) * layout.lineCount();
}
inline LayoutUnit computeFlowFirstLineBaseline(const RenderBlockFlow& flow, const Layout& layout)
{
ASSERT_UNUSED(layout, layout.lineCount());
return flow.borderAndPaddingBefore() + baselineFromFlow(flow);
}
inline LayoutUnit computeFlowLastLineBaseline(const RenderBlockFlow& flow, const Layout& layout)
{
ASSERT(layout.lineCount());
return flow.borderAndPaddingBefore() + lineHeightFromFlow(flow) * (layout.lineCount() - 1) + baselineFromFlow(flow);
}
inline unsigned findCaretMinimumOffset(const RenderText&, const Layout& layout)
{
if (!layout.runCount())
return 0;
return layout.runAt(0).start;
}
inline unsigned findCaretMaximumOffset(const RenderText& renderer, const Layout& layout)
{
if (!layout.runCount())
return renderer.textLength();
auto& last = layout.runAt(layout.runCount() - 1);
return last.end;
}
inline bool containsCaretOffset(const RenderText&, const Layout& layout, unsigned offset)
{
for (unsigned i = 0; i < layout.runCount(); ++i) {
auto& run = layout.runAt(i);
if (offset < run.start)
return false;
if (offset <= run.end)
return true;
}
return false;
}
inline bool isTextRendered(const RenderText&, const Layout& layout)
{
for (unsigned i = 0; i < layout.runCount(); ++i) {
auto& run = layout.runAt(i);
if (run.end > run.start)
return true;
}
return false;
}
inline LayoutUnit lineHeightFromFlow(const RenderBlockFlow& flow)
{
return flow.lineHeight(false, HorizontalLine, PositionOfInteriorLineBoxes);
}
inline LayoutUnit baselineFromFlow(const RenderBlockFlow& flow)
{
return flow.baselinePosition(AlphabeticBaseline, false, HorizontalLine, PositionOfInteriorLineBoxes);
}
}
}
#endif
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