michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsMathMLSelectedFrame.h"
michael@0: #include "nsDisplayList.h"
michael@0: 
michael@0: nsMathMLSelectedFrame::~nsMathMLSelectedFrame()
michael@0: {
michael@0: }
michael@0: 
michael@0: void
michael@0: nsMathMLSelectedFrame::Init(nsIContent*      aContent,
michael@0:                             nsIFrame*        aParent,
michael@0:                             nsIFrame*        aPrevInFlow)
michael@0: {
michael@0:   // Init our local attributes
michael@0:   mInvalidMarkup = false;
michael@0:   mSelectedFrame = nullptr;
michael@0: 
michael@0:   // Let the base class do the rest
michael@0:   nsMathMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsMathMLSelectedFrame::TransmitAutomaticData()
michael@0: {
michael@0:   // Note that to determine space-like and embellished op properties:
michael@0:   //   - <semantics> behaves the same as <maction>
michael@0:   //   - <annotation-xml> behaves the same as <mrow>
michael@0: 
michael@0:   // The REC defines the following element to be space-like:
michael@0:   // * an maction element whose selected sub-expression exists and is
michael@0:   //   space-like;
michael@0:   nsIMathMLFrame* mathMLFrame = do_QueryFrame(mSelectedFrame);
michael@0:   if (mathMLFrame && mathMLFrame->IsSpaceLike()) {
michael@0:     mPresentationData.flags |= NS_MATHML_SPACE_LIKE;
michael@0:   } else {
michael@0:     mPresentationData.flags &= ~NS_MATHML_SPACE_LIKE;
michael@0:   }
michael@0: 
michael@0:   // The REC defines the following element to be an embellished operator:
michael@0:   // * an maction element whose selected sub-expression exists and is an
michael@0:   //   embellished operator;
michael@0:   mPresentationData.baseFrame = mSelectedFrame;
michael@0:   GetEmbellishDataFrom(mSelectedFrame, mEmbellishData);
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsMathMLSelectedFrame::ChildListChanged(int32_t aModType)
michael@0: {
michael@0:   GetSelectedFrame();
michael@0:   return nsMathMLContainerFrame::ChildListChanged(aModType);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsMathMLSelectedFrame::SetInitialChildList(ChildListID     aListID,
michael@0:                                            nsFrameList&    aChildList)
michael@0: {
michael@0:   nsresult rv = nsMathMLContainerFrame::SetInitialChildList(aListID,
michael@0:                                                             aChildList);
michael@0:   // This very first call to GetSelectedFrame() will cause us to be marked as an
michael@0:   // embellished operator if the selected child is an embellished operator
michael@0:   GetSelectedFrame();
michael@0:   return rv;
michael@0: }
michael@0: 
michael@0: //  Only paint the selected child...
michael@0: void
michael@0: nsMathMLSelectedFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
michael@0:                                         const nsRect&           aDirtyRect,
michael@0:                                         const nsDisplayListSet& aLists)
michael@0: {
michael@0:   // Report an error if something wrong was found in this frame.
michael@0:   // We can't call nsDisplayMathMLError from here,
michael@0:   // so ask nsMathMLContainerFrame to do the work for us.
michael@0:   if (NS_MATHML_HAS_ERROR(mPresentationData.flags)) {
michael@0:     nsMathMLContainerFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   DisplayBorderBackgroundOutline(aBuilder, aLists);
michael@0: 
michael@0:   nsIFrame* childFrame = GetSelectedFrame();
michael@0:   if (childFrame) {
michael@0:     // Put the child's background directly onto the content list
michael@0:     nsDisplayListSet set(aLists, aLists.Content());
michael@0:     // The children should be in content order
michael@0:     BuildDisplayListForChild(aBuilder, childFrame, aDirtyRect, set);
michael@0:   }
michael@0: 
michael@0: #if defined(DEBUG) && defined(SHOW_BOUNDING_BOX)
michael@0:   // visual debug
michael@0:   DisplayBoundingMetrics(aBuilder, this, mReference, mBoundingMetrics, aLists);
michael@0: #endif
michael@0: }
michael@0: 
michael@0: // Only reflow the selected child ...
michael@0: nsresult
michael@0: nsMathMLSelectedFrame::Reflow(nsPresContext*          aPresContext,
michael@0:                               nsHTMLReflowMetrics&     aDesiredSize,
michael@0:                               const nsHTMLReflowState& aReflowState,
michael@0:                               nsReflowStatus&          aStatus)
michael@0: {
michael@0:   nsresult rv = NS_OK;
michael@0:   aStatus = NS_FRAME_COMPLETE;
michael@0:   aDesiredSize.Width() = aDesiredSize.Height() = 0;
michael@0:   aDesiredSize.SetTopAscent(0);
michael@0:   mBoundingMetrics = nsBoundingMetrics();
michael@0:   nsIFrame* childFrame = GetSelectedFrame();
michael@0:   if (childFrame) {
michael@0:     nsSize availSize(aReflowState.ComputedWidth(), NS_UNCONSTRAINEDSIZE);
michael@0:     nsHTMLReflowState childReflowState(aPresContext, aReflowState,
michael@0:                                        childFrame, availSize);
michael@0:     rv = ReflowChild(childFrame, aPresContext, aDesiredSize,
michael@0:                      childReflowState, aStatus);
michael@0:     SaveReflowAndBoundingMetricsFor(childFrame, aDesiredSize,
michael@0:                                     aDesiredSize.mBoundingMetrics);
michael@0:     mBoundingMetrics = aDesiredSize.mBoundingMetrics;
michael@0:   }
michael@0:   FinalizeReflow(*aReflowState.rendContext, aDesiredSize);
michael@0:   NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
michael@0:   return rv;
michael@0: }
michael@0: 
michael@0: // Only place the selected child ...
michael@0: /* virtual */ nsresult
michael@0: nsMathMLSelectedFrame::Place(nsRenderingContext& aRenderingContext,
michael@0:                              bool                 aPlaceOrigin,
michael@0:                              nsHTMLReflowMetrics& aDesiredSize)
michael@0: {
michael@0:   nsIFrame* childFrame = GetSelectedFrame();
michael@0: 
michael@0:   if (mInvalidMarkup) {
michael@0:     return ReflowError(aRenderingContext, aDesiredSize);
michael@0:   }
michael@0: 
michael@0:   aDesiredSize.Width() = aDesiredSize.Height() = 0;
michael@0:   aDesiredSize.SetTopAscent(0);
michael@0:   mBoundingMetrics = nsBoundingMetrics();
michael@0:   if (childFrame) {
michael@0:     GetReflowAndBoundingMetricsFor(childFrame, aDesiredSize, mBoundingMetrics);
michael@0:     if (aPlaceOrigin) {
michael@0:       FinishReflowChild(childFrame, PresContext(), aDesiredSize, nullptr, 0, 0, 0);
michael@0:     }
michael@0:     mReference.x = 0;
michael@0:     mReference.y = aDesiredSize.TopAscent();
michael@0:   }
michael@0:   aDesiredSize.mBoundingMetrics = mBoundingMetrics;
michael@0:   return NS_OK;
michael@0: }