/* -*- 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" nsMathMLSelectedFrame::~nsMathMLSelectedFrame() { } void nsMathMLSelectedFrame::Init(nsIContent* aContent, nsIFrame* 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: // - behaves the same as // - behaves the same as // 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); } NS_IMETHODIMP nsMathMLSelectedFrame::SetInitialChildList(ChildListID aListID, nsFrameList& aChildList) { nsresult rv = 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(); return rv; } // 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 } // Only reflow the selected child ... NS_IMETHODIMP nsMathMLSelectedFrame::Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { nsresult rv = NS_OK; aStatus = NS_FRAME_COMPLETE; aDesiredSize.Width() = aDesiredSize.Height() = 0; aDesiredSize.SetTopAscent(0); mBoundingMetrics = nsBoundingMetrics(); nsIFrame* childFrame = GetSelectedFrame(); if (childFrame) { nsSize availSize(aReflowState.ComputedWidth(), NS_UNCONSTRAINEDSIZE); nsHTMLReflowState childReflowState(aPresContext, aReflowState, childFrame, availSize); rv = ReflowChild(childFrame, aPresContext, aDesiredSize, childReflowState, aStatus); SaveReflowAndBoundingMetricsFor(childFrame, aDesiredSize, aDesiredSize.mBoundingMetrics); mBoundingMetrics = aDesiredSize.mBoundingMetrics; } FinalizeReflow(*aReflowState.rendContext, aDesiredSize); NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize); return rv; } // Only place the selected child ... /* virtual */ nsresult nsMathMLSelectedFrame::Place(nsRenderingContext& aRenderingContext, bool aPlaceOrigin, nsHTMLReflowMetrics& aDesiredSize) { nsIFrame* childFrame = GetSelectedFrame(); if (mInvalidMarkup) { return ReflowError(aRenderingContext, aDesiredSize); } aDesiredSize.Width() = aDesiredSize.Height() = 0; aDesiredSize.SetTopAscent(0); mBoundingMetrics = nsBoundingMetrics(); if (childFrame) { GetReflowAndBoundingMetricsFor(childFrame, aDesiredSize, mBoundingMetrics); if (aPlaceOrigin) { FinishReflowChild(childFrame, PresContext(), nullptr, aDesiredSize, 0, 0, 0); } mReference.x = 0; mReference.y = aDesiredSize.TopAscent(); } aDesiredSize.mBoundingMetrics = mBoundingMetrics; return NS_OK; }