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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.
*/
#pragma once
#include "SimpleLineLayoutCoverage.h"
#include "TextFlags.h"
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
#if COMPILER(MSVC)
#pragma warning(push)
#pragma warning(disable: 4200) // Disable "zero-sized array in struct/union" warning
#endif
namespace WebCore {
class RenderBlockFlow;
namespace SimpleLineLayout {
class RunResolver;
bool canUseFor(const RenderBlockFlow&);
AvoidanceReasonFlags canUseForWithReason(const RenderBlockFlow&, IncludeReasons);
struct Run {
#if COMPILER(MSVC)
Run() { }
#endif
Run(unsigned start, unsigned end, float logicalLeft, float logicalRight, bool isEndOfLine, bool hasHyphen)
: end(end)
, start(start)
, isEndOfLine(isEndOfLine)
, hasHyphen(hasHyphen)
, logicalLeft(logicalLeft)
, logicalRight(logicalRight)
{ }
unsigned end;
unsigned start : 30;
unsigned isEndOfLine : 1;
unsigned hasHyphen : 1;
float logicalLeft;
float logicalRight;
// TODO: Move these optional items out of SimpleLineLayout::Run to a supplementary structure.
float expansion { 0 };
ExpansionBehavior expansionBehavior { ForbidLeadingExpansion | ForbidTrailingExpansion };
};
struct SimpleLineStrut {
unsigned lineBreak;
float offset;
};
class Layout {
WTF_MAKE_FAST_ALLOCATED;
public:
using RunVector = Vector<Run, 10>;
using SimpleLineStruts = Vector<SimpleLineStrut, 4>;
static std::unique_ptr<Layout> create(const RunVector&, unsigned lineCount, const RenderBlockFlow&);
~Layout();
unsigned lineCount() const { return m_lineCount; }
unsigned runCount() const { return m_runCount; }
const Run& runAt(unsigned i) const { return m_runs[i]; }
void setIsPaginated() { m_isPaginated = true; }
bool isPaginated() const { return m_isPaginated; }
bool hasLineStruts() const { return !m_lineStruts.isEmpty(); }
void setLineStruts(SimpleLineStruts&& lineStruts) { m_lineStruts = lineStruts; }
const SimpleLineStruts& struts() const { return m_lineStruts; }
const RunResolver& runResolver() const;
private:
Layout(const RunVector&, unsigned lineCount, const RenderBlockFlow&);
unsigned m_lineCount;
unsigned m_runCount;
bool m_isPaginated { false };
SimpleLineStruts m_lineStruts;
const RenderBlockFlow& m_blockFlowRenderer;
mutable std::unique_ptr<RunResolver> m_runResolver;
Run m_runs[0];
};
std::unique_ptr<Layout> create(RenderBlockFlow&);
}
}
#if COMPILER(MSVC)
#pragma warning(pop)
#endif