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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsMathMLSelectedFrame.h"
#include "nsDisplayList.h"
using namespace mozilla;
nsMathMLSelectedFrame::~nsMathMLSelectedFrame() = default;
NS_IMETHODIMP
nsMathMLSelectedFrame::TransmitAutomaticData() {
// Note that to determine space-like and embellished op properties:
// - <semantics> behaves the same as <maction>
// - <annotation-xml> behaves the same as <mrow>
// The REC defines the following element to be space-like:
// * an maction element whose selected sub-expression exists and is
// space-like;
nsIMathMLFrame* mathMLFrame = do_QueryFrame(mSelectedFrame);
if (mathMLFrame && mathMLFrame->IsSpaceLike()) {
mPresentationData.flags |= NS_MATHML_SPACE_LIKE;
} else {
mPresentationData.flags &= ~NS_MATHML_SPACE_LIKE;
}
// The REC defines the following element to be an embellished operator:
// * an maction element whose selected sub-expression exists and is an
// embellished operator;
mPresentationData.baseFrame = mSelectedFrame;
GetEmbellishDataFrom(mSelectedFrame, mEmbellishData);
return NS_OK;
}
nsresult nsMathMLSelectedFrame::ChildListChanged(int32_t aModType) {
GetSelectedFrame();
return nsMathMLContainerFrame::ChildListChanged(aModType);
}
void nsMathMLSelectedFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) {
nsMathMLContainerFrame::SetInitialChildList(aListID, aChildList);
// This very first call to GetSelectedFrame() will cause us to be marked as an
// embellished operator if the selected child is an embellished operator
GetSelectedFrame();
}
// Only paint the selected child...
void nsMathMLSelectedFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
// Report an error if something wrong was found in this frame.
// We can't call nsDisplayMathMLError from here,
// so ask nsMathMLContainerFrame to do the work for us.
if (NS_MATHML_HAS_ERROR(mPresentationData.flags)) {
nsMathMLContainerFrame::BuildDisplayList(aBuilder, aLists);
return;
}
DisplayBorderBackgroundOutline(aBuilder, aLists);
nsIFrame* childFrame = GetSelectedFrame();
if (childFrame) {
// Put the child's background directly onto the content list
nsDisplayListSet set(aLists, aLists.Content());
// The children should be in content order
BuildDisplayListForChild(aBuilder, childFrame, set);
}
#if defined(DEBUG) && defined(SHOW_BOUNDING_BOX)
// visual debug
DisplayBoundingMetrics(aBuilder, this, mReference, mBoundingMetrics, aLists);
#endif
}
/* virtual */
nsIFrame::SizeComputationResult nsMathMLSelectedFrame::ComputeSize(
gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
nscoord aAvailableISize, const LogicalSize& aMargin,
const LogicalSize& aBorderPadding, ComputeSizeFlags aFlags) {
nsIFrame* childFrame = GetSelectedFrame();
if (childFrame) {
// Delegate size computation to the child frame.
// Try to account for border/padding/margin on this frame and the child,
// though we don't really support them during reflow anyway...
const nscoord availableISize =
aAvailableISize - aBorderPadding.ISize(aWM) - aMargin.ISize(aWM);
const LogicalSize cbSize = aCBSize - aBorderPadding - aMargin;
SizeComputationInput offsetState(childFrame, aRenderingContext, aWM,
availableISize);
const auto bpSize = offsetState.ComputedLogicalBorderPadding(aWM).Size(aWM);
auto size = childFrame->ComputeSize(
aRenderingContext, aWM, cbSize, availableISize,
offsetState.ComputedLogicalMargin(aWM).Size(aWM), bpSize, aFlags);
return {size.mLogicalSize + bpSize, size.mAspectRatioUsage};
}
return {LogicalSize(aWM), AspectRatioUsage::None};
}
// Only reflow the selected child ...
void nsMathMLSelectedFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
mPresentationData.flags &= ~NS_MATHML_ERROR;
aDesiredSize.ClearSize();
aDesiredSize.SetBlockStartAscent(0);
mBoundingMetrics = nsBoundingMetrics();
nsIFrame* childFrame = GetSelectedFrame();
if (childFrame) {
WritingMode wm = childFrame->GetWritingMode();
LogicalSize availSize = aReflowInput.ComputedSize(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput childReflowInput(aPresContext, aReflowInput, childFrame,
availSize);
ReflowChild(childFrame, aPresContext, aDesiredSize, childReflowInput,
aStatus);
SaveReflowAndBoundingMetricsFor(childFrame, aDesiredSize,
aDesiredSize.mBoundingMetrics);
mBoundingMetrics = aDesiredSize.mBoundingMetrics;
}
FinalizeReflow(aReflowInput.mRenderingContext->GetDrawTarget(), aDesiredSize);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
// Only place the selected child ...
/* virtual */
nsresult nsMathMLSelectedFrame::Place(DrawTarget* aDrawTarget,
bool aPlaceOrigin,
ReflowOutput& aDesiredSize) {
nsIFrame* childFrame = GetSelectedFrame();
if (mInvalidMarkup) {
return ReflowError(aDrawTarget, aDesiredSize);
}
aDesiredSize.ClearSize();
aDesiredSize.SetBlockStartAscent(0);
mBoundingMetrics = nsBoundingMetrics();
if (childFrame) {
GetReflowAndBoundingMetricsFor(childFrame, aDesiredSize, mBoundingMetrics);
if (aPlaceOrigin) {
FinishReflowChild(childFrame, PresContext(), aDesiredSize, nullptr, 0, 0,
ReflowChildFlags::Default);
}
mReference.x = 0;
mReference.y = aDesiredSize.BlockStartAscent();
}
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
return NS_OK;
}
|
