mirror of
https://github.com/classilla/tenfourfox.git
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190 lines
6.9 KiB
C++
190 lines
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsMathMLSelectedFrame.h"
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#include "nsDisplayList.h"
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using namespace mozilla;
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nsMathMLSelectedFrame::~nsMathMLSelectedFrame()
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{
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}
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void
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nsMathMLSelectedFrame::Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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// Init our local attributes
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mInvalidMarkup = false;
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mSelectedFrame = nullptr;
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// Let the base class do the rest
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nsMathMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
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}
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NS_IMETHODIMP
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nsMathMLSelectedFrame::TransmitAutomaticData()
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{
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// Note that to determine space-like and embellished op properties:
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// - <semantics> behaves the same as <maction>
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// - <annotation-xml> behaves the same as <mrow>
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// The REC defines the following element to be space-like:
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// * an maction element whose selected sub-expression exists and is
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// space-like;
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nsIMathMLFrame* mathMLFrame = do_QueryFrame(mSelectedFrame);
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if (mathMLFrame && mathMLFrame->IsSpaceLike()) {
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mPresentationData.flags |= NS_MATHML_SPACE_LIKE;
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} else {
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mPresentationData.flags &= ~NS_MATHML_SPACE_LIKE;
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}
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// The REC defines the following element to be an embellished operator:
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// * an maction element whose selected sub-expression exists and is an
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// embellished operator;
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mPresentationData.baseFrame = mSelectedFrame;
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GetEmbellishDataFrom(mSelectedFrame, mEmbellishData);
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return NS_OK;
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}
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nsresult
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nsMathMLSelectedFrame::ChildListChanged(int32_t aModType)
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{
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GetSelectedFrame();
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return nsMathMLContainerFrame::ChildListChanged(aModType);
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}
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void
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nsMathMLSelectedFrame::SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList)
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{
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nsMathMLContainerFrame::SetInitialChildList(aListID, aChildList);
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// This very first call to GetSelectedFrame() will cause us to be marked as an
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// embellished operator if the selected child is an embellished operator
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GetSelectedFrame();
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}
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// Only paint the selected child...
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void
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nsMathMLSelectedFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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// Report an error if something wrong was found in this frame.
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// We can't call nsDisplayMathMLError from here,
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// so ask nsMathMLContainerFrame to do the work for us.
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if (NS_MATHML_HAS_ERROR(mPresentationData.flags)) {
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nsMathMLContainerFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
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return;
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}
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DisplayBorderBackgroundOutline(aBuilder, aLists);
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nsIFrame* childFrame = GetSelectedFrame();
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if (childFrame) {
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// Put the child's background directly onto the content list
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nsDisplayListSet set(aLists, aLists.Content());
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// The children should be in content order
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BuildDisplayListForChild(aBuilder, childFrame, aDirtyRect, set);
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}
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#if defined(DEBUG) && defined(SHOW_BOUNDING_BOX)
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// visual debug
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DisplayBoundingMetrics(aBuilder, this, mReference, mBoundingMetrics, aLists);
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#endif
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}
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/* virtual */
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LogicalSize
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nsMathMLSelectedFrame::ComputeSize(nsRenderingContext *aRenderingContext,
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WritingMode aWM,
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const LogicalSize& aCBSize,
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nscoord aAvailableISize,
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const LogicalSize& aMargin,
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const LogicalSize& aBorder,
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const LogicalSize& aPadding,
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ComputeSizeFlags aFlags)
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{
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nsIFrame* childFrame = GetSelectedFrame();
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if (childFrame) {
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// Delegate size computation to the child frame.
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// Try to account for border/padding/margin on this frame and the child,
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// though we don't really support them during reflow anyway...
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nscoord availableISize = aAvailableISize - aBorder.ISize(aWM) -
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aPadding.ISize(aWM) - aMargin.ISize(aWM);
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LogicalSize cbSize = aCBSize - aBorder - aPadding - aMargin;
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nsCSSOffsetState offsetState(childFrame, aRenderingContext, aWM,
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availableISize);
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LogicalSize size =
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childFrame->ComputeSize(aRenderingContext, aWM, cbSize,
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availableISize, offsetState.ComputedLogicalMargin().Size(aWM),
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offsetState.ComputedLogicalBorderPadding().Size(aWM) -
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offsetState.ComputedLogicalPadding().Size(aWM),
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offsetState.ComputedLogicalPadding().Size(aWM),
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aFlags);
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return size + offsetState.ComputedLogicalBorderPadding().Size(aWM);
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}
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return LogicalSize(aWM);
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}
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// Only reflow the selected child ...
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void
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nsMathMLSelectedFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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MarkInReflow();
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mPresentationData.flags &= ~NS_MATHML_ERROR;
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aStatus = NS_FRAME_COMPLETE;
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aDesiredSize.ClearSize();
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aDesiredSize.SetBlockStartAscent(0);
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mBoundingMetrics = nsBoundingMetrics();
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nsIFrame* childFrame = GetSelectedFrame();
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if (childFrame) {
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WritingMode wm = childFrame->GetWritingMode();
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LogicalSize availSize = aReflowState.ComputedSize(wm);
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availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
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nsHTMLReflowState childReflowState(aPresContext, aReflowState,
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childFrame, availSize);
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ReflowChild(childFrame, aPresContext, aDesiredSize,
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childReflowState, aStatus);
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SaveReflowAndBoundingMetricsFor(childFrame, aDesiredSize,
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aDesiredSize.mBoundingMetrics);
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mBoundingMetrics = aDesiredSize.mBoundingMetrics;
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}
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FinalizeReflow(*aReflowState.rendContext, aDesiredSize);
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
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}
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// Only place the selected child ...
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/* virtual */ nsresult
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nsMathMLSelectedFrame::Place(nsRenderingContext& aRenderingContext,
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bool aPlaceOrigin,
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nsHTMLReflowMetrics& aDesiredSize)
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{
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nsIFrame* childFrame = GetSelectedFrame();
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if (mInvalidMarkup) {
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return ReflowError(aRenderingContext, aDesiredSize);
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}
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aDesiredSize.ClearSize();
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aDesiredSize.SetBlockStartAscent(0);
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mBoundingMetrics = nsBoundingMetrics();
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if (childFrame) {
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GetReflowAndBoundingMetricsFor(childFrame, aDesiredSize, mBoundingMetrics);
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if (aPlaceOrigin) {
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FinishReflowChild(childFrame, PresContext(), aDesiredSize, nullptr, 0, 0, 0);
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}
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mReference.x = 0;
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mReference.y = aDesiredSize.BlockStartAscent();
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}
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aDesiredSize.mBoundingMetrics = mBoundingMetrics;
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return NS_OK;
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}
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