The Tor Browser / file comparison
comparison: layout/mathml/nsMathMLmspaceFrame.cpp
layout/mathml/nsMathMLmspaceFrame.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:299b5a47ff01 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "nsMathMLmspaceFrame.h" | |
| 7 #include "nsMathMLElement.h" | |
| 8 #include "mozilla/gfx/2D.h" | |
| 9 #include <algorithm> | |
| 10 | |
| 11 | |
| 12 // | |
| 13 // <mspace> -- space - implementation | |
| 14 // | |
| 15 | |
| 16 nsIFrame* | |
| 17 NS_NewMathMLmspaceFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) | |
| 18 { | |
| 19 return new (aPresShell) nsMathMLmspaceFrame(aContext); | |
| 20 } | |
| 21 | |
| 22 NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame) | |
| 23 | |
| 24 nsMathMLmspaceFrame::~nsMathMLmspaceFrame() | |
| 25 { | |
| 26 } | |
| 27 | |
| 28 bool | |
| 29 nsMathMLmspaceFrame::IsLeaf() const | |
| 30 { | |
| 31 return true; | |
| 32 } | |
| 33 | |
| 34 void | |
| 35 nsMathMLmspaceFrame::ProcessAttributes(nsPresContext* aPresContext) | |
| 36 { | |
| 37 nsAutoString value; | |
| 38 | |
| 39 // width | |
| 40 // | |
| 41 // "Specifies the desired width of the space." | |
| 42 // | |
| 43 // values: length | |
| 44 // default: 0em | |
| 45 // | |
| 46 // The default value is "0em", so unitless values can be ignored. | |
| 47 // <mspace/> is listed among MathML elements allowing negative spacing and | |
| 48 // the MathML test suite contains "Presentation/TokenElements/mspace/mspace2" | |
| 49 // as an example. Hence we allow negative values. | |
| 50 // | |
| 51 mWidth = 0; | |
| 52 mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::width, value); | |
| 53 if (!value.IsEmpty()) { | |
| 54 ParseNumericValue(value, &mWidth, | |
| 55 nsMathMLElement::PARSE_ALLOW_NEGATIVE, | |
| 56 aPresContext, mStyleContext); | |
| 57 } | |
| 58 | |
| 59 // height | |
| 60 // | |
| 61 // "Specifies the desired height (above the baseline) of the space." | |
| 62 // | |
| 63 // values: length | |
| 64 // default: 0ex | |
| 65 // | |
| 66 // The default value is "0ex", so unitless values can be ignored. | |
| 67 // We do not allow negative values. See bug 716349. | |
| 68 // | |
| 69 mHeight = 0; | |
| 70 mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::height, value); | |
| 71 if (!value.IsEmpty()) { | |
| 72 ParseNumericValue(value, &mHeight, 0, | |
| 73 aPresContext, mStyleContext); | |
| 74 } | |
| 75 | |
| 76 // depth | |
| 77 // | |
| 78 // "Specifies the desired depth (below the baseline) of the space." | |
| 79 // | |
| 80 // values: length | |
| 81 // default: 0ex | |
| 82 // | |
| 83 // The default value is "0ex", so unitless values can be ignored. | |
| 84 // We do not allow negative values. See bug 716349. | |
| 85 // | |
| 86 mDepth = 0; | |
| 87 mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::depth_, value); | |
| 88 if (!value.IsEmpty()) { | |
| 89 ParseNumericValue(value, &mDepth, 0, | |
| 90 aPresContext, mStyleContext); | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 nsresult | |
| 95 nsMathMLmspaceFrame::Reflow(nsPresContext* aPresContext, | |
| 96 nsHTMLReflowMetrics& aDesiredSize, | |
| 97 const nsHTMLReflowState& aReflowState, | |
| 98 nsReflowStatus& aStatus) | |
| 99 { | |
| 100 ProcessAttributes(aPresContext); | |
| 101 | |
| 102 mBoundingMetrics = nsBoundingMetrics(); | |
| 103 mBoundingMetrics.width = mWidth; | |
| 104 mBoundingMetrics.ascent = mHeight; | |
| 105 mBoundingMetrics.descent = mDepth; | |
| 106 mBoundingMetrics.leftBearing = 0; | |
| 107 mBoundingMetrics.rightBearing = mBoundingMetrics.width; | |
| 108 | |
| 109 aDesiredSize.SetTopAscent(mHeight); | |
| 110 aDesiredSize.Width() = std::max(0, mBoundingMetrics.width); | |
| 111 aDesiredSize.Height() = aDesiredSize.TopAscent() + mDepth; | |
| 112 // Also return our bounding metrics | |
| 113 aDesiredSize.mBoundingMetrics = mBoundingMetrics; | |
| 114 | |
| 115 aStatus = NS_FRAME_COMPLETE; | |
| 116 NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize); | |
| 117 return NS_OK; | |
| 118 } | |
| 119 | |
| 120 /* virtual */ nsresult | |
| 121 nsMathMLmspaceFrame::MeasureForWidth(nsRenderingContext& aRenderingContext, | |
| 122 nsHTMLReflowMetrics& aDesiredSize) | |
| 123 { | |
| 124 ProcessAttributes(PresContext()); | |
| 125 mBoundingMetrics = nsBoundingMetrics(); | |
| 126 mBoundingMetrics.width = mWidth; | |
| 127 aDesiredSize.Width() = std::max(0, mBoundingMetrics.width); | |
| 128 aDesiredSize.mBoundingMetrics = mBoundingMetrics; | |
| 129 return NS_OK; | |
| 130 } |
