1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/mathml/nsMathMLSelectedFrame.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,154 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsMathMLSelectedFrame.h"
1.10 +#include "nsDisplayList.h"
1.11 +
1.12 +nsMathMLSelectedFrame::~nsMathMLSelectedFrame()
1.13 +{
1.14 +}
1.15 +
1.16 +void
1.17 +nsMathMLSelectedFrame::Init(nsIContent* aContent,
1.18 + nsIFrame* aParent,
1.19 + nsIFrame* aPrevInFlow)
1.20 +{
1.21 + // Init our local attributes
1.22 + mInvalidMarkup = false;
1.23 + mSelectedFrame = nullptr;
1.24 +
1.25 + // Let the base class do the rest
1.26 + nsMathMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
1.27 +}
1.28 +
1.29 +NS_IMETHODIMP
1.30 +nsMathMLSelectedFrame::TransmitAutomaticData()
1.31 +{
1.32 + // Note that to determine space-like and embellished op properties:
1.33 + // - <semantics> behaves the same as <maction>
1.34 + // - <annotation-xml> behaves the same as <mrow>
1.35 +
1.36 + // The REC defines the following element to be space-like:
1.37 + // * an maction element whose selected sub-expression exists and is
1.38 + // space-like;
1.39 + nsIMathMLFrame* mathMLFrame = do_QueryFrame(mSelectedFrame);
1.40 + if (mathMLFrame && mathMLFrame->IsSpaceLike()) {
1.41 + mPresentationData.flags |= NS_MATHML_SPACE_LIKE;
1.42 + } else {
1.43 + mPresentationData.flags &= ~NS_MATHML_SPACE_LIKE;
1.44 + }
1.45 +
1.46 + // The REC defines the following element to be an embellished operator:
1.47 + // * an maction element whose selected sub-expression exists and is an
1.48 + // embellished operator;
1.49 + mPresentationData.baseFrame = mSelectedFrame;
1.50 + GetEmbellishDataFrom(mSelectedFrame, mEmbellishData);
1.51 +
1.52 + return NS_OK;
1.53 +}
1.54 +
1.55 +nsresult
1.56 +nsMathMLSelectedFrame::ChildListChanged(int32_t aModType)
1.57 +{
1.58 + GetSelectedFrame();
1.59 + return nsMathMLContainerFrame::ChildListChanged(aModType);
1.60 +}
1.61 +
1.62 +nsresult
1.63 +nsMathMLSelectedFrame::SetInitialChildList(ChildListID aListID,
1.64 + nsFrameList& aChildList)
1.65 +{
1.66 + nsresult rv = nsMathMLContainerFrame::SetInitialChildList(aListID,
1.67 + aChildList);
1.68 + // This very first call to GetSelectedFrame() will cause us to be marked as an
1.69 + // embellished operator if the selected child is an embellished operator
1.70 + GetSelectedFrame();
1.71 + return rv;
1.72 +}
1.73 +
1.74 +// Only paint the selected child...
1.75 +void
1.76 +nsMathMLSelectedFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.77 + const nsRect& aDirtyRect,
1.78 + const nsDisplayListSet& aLists)
1.79 +{
1.80 + // Report an error if something wrong was found in this frame.
1.81 + // We can't call nsDisplayMathMLError from here,
1.82 + // so ask nsMathMLContainerFrame to do the work for us.
1.83 + if (NS_MATHML_HAS_ERROR(mPresentationData.flags)) {
1.84 + nsMathMLContainerFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
1.85 + return;
1.86 + }
1.87 +
1.88 + DisplayBorderBackgroundOutline(aBuilder, aLists);
1.89 +
1.90 + nsIFrame* childFrame = GetSelectedFrame();
1.91 + if (childFrame) {
1.92 + // Put the child's background directly onto the content list
1.93 + nsDisplayListSet set(aLists, aLists.Content());
1.94 + // The children should be in content order
1.95 + BuildDisplayListForChild(aBuilder, childFrame, aDirtyRect, set);
1.96 + }
1.97 +
1.98 +#if defined(DEBUG) && defined(SHOW_BOUNDING_BOX)
1.99 + // visual debug
1.100 + DisplayBoundingMetrics(aBuilder, this, mReference, mBoundingMetrics, aLists);
1.101 +#endif
1.102 +}
1.103 +
1.104 +// Only reflow the selected child ...
1.105 +nsresult
1.106 +nsMathMLSelectedFrame::Reflow(nsPresContext* aPresContext,
1.107 + nsHTMLReflowMetrics& aDesiredSize,
1.108 + const nsHTMLReflowState& aReflowState,
1.109 + nsReflowStatus& aStatus)
1.110 +{
1.111 + nsresult rv = NS_OK;
1.112 + aStatus = NS_FRAME_COMPLETE;
1.113 + aDesiredSize.Width() = aDesiredSize.Height() = 0;
1.114 + aDesiredSize.SetTopAscent(0);
1.115 + mBoundingMetrics = nsBoundingMetrics();
1.116 + nsIFrame* childFrame = GetSelectedFrame();
1.117 + if (childFrame) {
1.118 + nsSize availSize(aReflowState.ComputedWidth(), NS_UNCONSTRAINEDSIZE);
1.119 + nsHTMLReflowState childReflowState(aPresContext, aReflowState,
1.120 + childFrame, availSize);
1.121 + rv = ReflowChild(childFrame, aPresContext, aDesiredSize,
1.122 + childReflowState, aStatus);
1.123 + SaveReflowAndBoundingMetricsFor(childFrame, aDesiredSize,
1.124 + aDesiredSize.mBoundingMetrics);
1.125 + mBoundingMetrics = aDesiredSize.mBoundingMetrics;
1.126 + }
1.127 + FinalizeReflow(*aReflowState.rendContext, aDesiredSize);
1.128 + NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
1.129 + return rv;
1.130 +}
1.131 +
1.132 +// Only place the selected child ...
1.133 +/* virtual */ nsresult
1.134 +nsMathMLSelectedFrame::Place(nsRenderingContext& aRenderingContext,
1.135 + bool aPlaceOrigin,
1.136 + nsHTMLReflowMetrics& aDesiredSize)
1.137 +{
1.138 + nsIFrame* childFrame = GetSelectedFrame();
1.139 +
1.140 + if (mInvalidMarkup) {
1.141 + return ReflowError(aRenderingContext, aDesiredSize);
1.142 + }
1.143 +
1.144 + aDesiredSize.Width() = aDesiredSize.Height() = 0;
1.145 + aDesiredSize.SetTopAscent(0);
1.146 + mBoundingMetrics = nsBoundingMetrics();
1.147 + if (childFrame) {
1.148 + GetReflowAndBoundingMetricsFor(childFrame, aDesiredSize, mBoundingMetrics);
1.149 + if (aPlaceOrigin) {
1.150 + FinishReflowChild(childFrame, PresContext(), aDesiredSize, nullptr, 0, 0, 0);
1.151 + }
1.152 + mReference.x = 0;
1.153 + mReference.y = aDesiredSize.TopAscent();
1.154 + }
1.155 + aDesiredSize.mBoundingMetrics = mBoundingMetrics;
1.156 + return NS_OK;
1.157 +}
