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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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()
{
}
void
nsMathMLSelectedFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
// Init our local attributes
mInvalidMarkup = false;
mSelectedFrame = nullptr;
// Let the base class do the rest
nsMathMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
}
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 nsRect& aDirtyRect,
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, aDirtyRect, 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, aDirtyRect, set);
}
#if defined(DEBUG) && defined(SHOW_BOUNDING_BOX)
// visual debug
DisplayBoundingMetrics(aBuilder, this, mReference, mBoundingMetrics, aLists);
#endif
}
/* virtual */
LogicalSize
nsMathMLSelectedFrame::ComputeSize(nsRenderingContext *aRenderingContext,
WritingMode aWM,
const LogicalSize& aCBSize,
nscoord aAvailableISize,
const LogicalSize& aMargin,
const LogicalSize& aBorder,
const LogicalSize& aPadding,
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...
nscoord availableISize = aAvailableISize - aBorder.ISize(aWM) -
aPadding.ISize(aWM) - aMargin.ISize(aWM);
LogicalSize cbSize = aCBSize - aBorder - aPadding - aMargin;
SizeComputationInput offsetState(childFrame, aRenderingContext, aWM,
availableISize);
LogicalSize size =
childFrame->ComputeSize(aRenderingContext, aWM, cbSize,
availableISize, offsetState.ComputedLogicalMargin().Size(aWM),
offsetState.ComputedLogicalBorderPadding().Size(aWM) -
offsetState.ComputedLogicalPadding().Size(aWM),
offsetState.ComputedLogicalPadding().Size(aWM),
aFlags);
return size + offsetState.ComputedLogicalBorderPadding().Size(aWM);
}
return LogicalSize(aWM);
}
// Only reflow the selected child ...
void
nsMathMLSelectedFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus)
{
MarkInReflow();
mPresentationData.flags &= ~NS_MATHML_ERROR;
aStatus = NS_FRAME_COMPLETE;
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, 0);
}
mReference.x = 0;
mReference.y = aDesiredSize.BlockStartAscent();
}
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
return NS_OK;
}
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