1/* 2 * Copyright (C) 2013 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef SimpleLineLayout_h 27#define SimpleLineLayout_h 28 29#include <wtf/Vector.h> 30#include <wtf/text/WTFString.h> 31 32#if COMPILER(MSVC) 33#pragma warning(push) 34#pragma warning(disable: 4200) // Disable "zero-sized array in struct/union" warning 35#endif 36 37namespace WebCore { 38 39class RenderBlockFlow; 40 41namespace SimpleLineLayout { 42 43bool canUseFor(const RenderBlockFlow&); 44 45struct Run { 46 Run() { } 47 Run(unsigned start, float left) 48 : start(start) 49 , end(start) 50 , isEndOfLine(false) 51 , left(left) 52 , right(left) 53 { } 54 55 unsigned start; 56 unsigned end : 31; 57 unsigned isEndOfLine : 1; 58 float left; 59 float right; 60}; 61 62class Layout { 63 WTF_MAKE_FAST_ALLOCATED; 64public: 65 typedef Vector<Run, 10> RunVector; 66 static std::unique_ptr<Layout> create(const RunVector&, unsigned lineCount); 67 68 unsigned lineCount() const { return m_lineCount; } 69 70 unsigned runCount() const { return m_runCount; } 71 const Run& runAt(unsigned i) const { return m_runs[i]; } 72 73private: 74 Layout(const RunVector&, unsigned lineCount); 75 76 unsigned m_lineCount; 77 unsigned m_runCount; 78 Run m_runs[0]; 79}; 80 81std::unique_ptr<Layout> create(RenderBlockFlow&); 82 83} 84} 85 86#if COMPILER(MSVC) 87#pragma warning(pop) 88#endif 89 90#endif 91