1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
|
/*
* 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;
class RenderText;
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 containsTextCaretOffset(const RenderText&, const Layout&, unsigned);
unsigned findTextCaretMinimumOffset(const RenderText&, const Layout&);
unsigned findTextCaretMaximumOffset(const RenderText&, const Layout&);
IntRect computeTextBoundingBox(const RenderText&, const Layout&);
IntPoint computeTextFirstRunLocation(const RenderText&, const Layout&);
Vector<IntRect> collectTextAbsoluteRects(const RenderText&, const Layout&, const LayoutPoint& accumulatedOffset);
Vector<FloatQuad> collectTextAbsoluteQuads(const RenderText&, const Layout&, bool* wasFixed);
LayoutUnit lineHeightFromFlow(const RenderBlockFlow&);
LayoutUnit baselineFromFlow(const RenderBlockFlow&);
#ifndef NDEBUG
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 findTextCaretMinimumOffset(const RenderText&, const Layout& layout)
{
if (!layout.runCount())
return 0;
return layout.runAt(0).start;
}
inline unsigned findTextCaretMaximumOffset(const RenderText& renderer, const Layout& layout)
{
if (!layout.runCount())
return renderer.textLength();
auto& last = layout.runAt(layout.runCount() - 1);
return last.end;
}
inline bool containsTextCaretOffset(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
|