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layout/mathml/nsMathMLSelectedFrame.cpp@b8a032363ba2 (annotated)

layout/mathml/nsMathMLSelectedFrame.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	#include "nsMathMLSelectedFrame.h"
michael@0	7	#include "nsDisplayList.h"
michael@0	8
michael@0	9	nsMathMLSelectedFrame::~nsMathMLSelectedFrame()
michael@0	10	{
michael@0	11	}
michael@0	12
michael@0	13	void
michael@0	14	nsMathMLSelectedFrame::Init(nsIContent* aContent,
michael@0	15	nsIFrame* aParent,
michael@0	16	nsIFrame* aPrevInFlow)
michael@0	17	{
michael@0	18	// Init our local attributes
michael@0	19	mInvalidMarkup = false;
michael@0	20	mSelectedFrame = nullptr;
michael@0	21
michael@0	22	// Let the base class do the rest
michael@0	23	nsMathMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
michael@0	24	}
michael@0	25
michael@0	26	NS_IMETHODIMP
michael@0	27	nsMathMLSelectedFrame::TransmitAutomaticData()
michael@0	28	{
michael@0	29	// Note that to determine space-like and embellished op properties:
michael@0	30	// - <semantics> behaves the same as <maction>
michael@0	31	// - <annotation-xml> behaves the same as <mrow>
michael@0	32
michael@0	33	// The REC defines the following element to be space-like:
michael@0	34	// * an maction element whose selected sub-expression exists and is
michael@0	35	// space-like;
michael@0	36	nsIMathMLFrame* mathMLFrame = do_QueryFrame(mSelectedFrame);
michael@0	37	if (mathMLFrame && mathMLFrame->IsSpaceLike()) {
michael@0	38	mPresentationData.flags |= NS_MATHML_SPACE_LIKE;
michael@0	39	} else {
michael@0	40	mPresentationData.flags &= ~NS_MATHML_SPACE_LIKE;
michael@0	41	}
michael@0	42
michael@0	43	// The REC defines the following element to be an embellished operator:
michael@0	44	// * an maction element whose selected sub-expression exists and is an
michael@0	45	// embellished operator;
michael@0	46	mPresentationData.baseFrame = mSelectedFrame;
michael@0	47	GetEmbellishDataFrom(mSelectedFrame, mEmbellishData);
michael@0	48
michael@0	49	return NS_OK;
michael@0	50	}
michael@0	51
michael@0	52	nsresult
michael@0	53	nsMathMLSelectedFrame::ChildListChanged(int32_t aModType)
michael@0	54	{
michael@0	55	GetSelectedFrame();
michael@0	56	return nsMathMLContainerFrame::ChildListChanged(aModType);
michael@0	57	}
michael@0	58
michael@0	59	nsresult
michael@0	60	nsMathMLSelectedFrame::SetInitialChildList(ChildListID aListID,
michael@0	61	nsFrameList& aChildList)
michael@0	62	{
michael@0	63	nsresult rv = nsMathMLContainerFrame::SetInitialChildList(aListID,
michael@0	64	aChildList);
michael@0	65	// This very first call to GetSelectedFrame() will cause us to be marked as an
michael@0	66	// embellished operator if the selected child is an embellished operator
michael@0	67	GetSelectedFrame();
michael@0	68	return rv;
michael@0	69	}
michael@0	70
michael@0	71	// Only paint the selected child...
michael@0	72	void
michael@0	73	nsMathMLSelectedFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
michael@0	74	const nsRect& aDirtyRect,
michael@0	75	const nsDisplayListSet& aLists)
michael@0	76	{
michael@0	77	// Report an error if something wrong was found in this frame.
michael@0	78	// We can't call nsDisplayMathMLError from here,
michael@0	79	// so ask nsMathMLContainerFrame to do the work for us.
michael@0	80	if (NS_MATHML_HAS_ERROR(mPresentationData.flags)) {
michael@0	81	nsMathMLContainerFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
michael@0	82	return;
michael@0	83	}
michael@0	84
michael@0	85	DisplayBorderBackgroundOutline(aBuilder, aLists);
michael@0	86
michael@0	87	nsIFrame* childFrame = GetSelectedFrame();
michael@0	88	if (childFrame) {
michael@0	89	// Put the child's background directly onto the content list
michael@0	90	nsDisplayListSet set(aLists, aLists.Content());
michael@0	91	// The children should be in content order
michael@0	92	BuildDisplayListForChild(aBuilder, childFrame, aDirtyRect, set);
michael@0	93	}
michael@0	94
michael@0	95	#if defined(DEBUG) && defined(SHOW_BOUNDING_BOX)
michael@0	96	// visual debug
michael@0	97	DisplayBoundingMetrics(aBuilder, this, mReference, mBoundingMetrics, aLists);
michael@0	98	#endif
michael@0	99	}
michael@0	100
michael@0	101	// Only reflow the selected child ...
michael@0	102	nsresult
michael@0	103	nsMathMLSelectedFrame::Reflow(nsPresContext* aPresContext,
michael@0	104	nsHTMLReflowMetrics& aDesiredSize,
michael@0	105	const nsHTMLReflowState& aReflowState,
michael@0	106	nsReflowStatus& aStatus)
michael@0	107	{
michael@0	108	nsresult rv = NS_OK;
michael@0	109	aStatus = NS_FRAME_COMPLETE;
michael@0	110	aDesiredSize.Width() = aDesiredSize.Height() = 0;
michael@0	111	aDesiredSize.SetTopAscent(0);
michael@0	112	mBoundingMetrics = nsBoundingMetrics();
michael@0	113	nsIFrame* childFrame = GetSelectedFrame();
michael@0	114	if (childFrame) {
michael@0	115	nsSize availSize(aReflowState.ComputedWidth(), NS_UNCONSTRAINEDSIZE);
michael@0	116	nsHTMLReflowState childReflowState(aPresContext, aReflowState,
michael@0	117	childFrame, availSize);
michael@0	118	rv = ReflowChild(childFrame, aPresContext, aDesiredSize,
michael@0	119	childReflowState, aStatus);
michael@0	120	SaveReflowAndBoundingMetricsFor(childFrame, aDesiredSize,
michael@0	121	aDesiredSize.mBoundingMetrics);
michael@0	122	mBoundingMetrics = aDesiredSize.mBoundingMetrics;
michael@0	123	}
michael@0	124	FinalizeReflow(*aReflowState.rendContext, aDesiredSize);
michael@0	125	NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
michael@0	126	return rv;
michael@0	127	}
michael@0	128
michael@0	129	// Only place the selected child ...
michael@0	130	/* virtual */ nsresult
michael@0	131	nsMathMLSelectedFrame::Place(nsRenderingContext& aRenderingContext,
michael@0	132	bool aPlaceOrigin,
michael@0	133	nsHTMLReflowMetrics& aDesiredSize)
michael@0	134	{
michael@0	135	nsIFrame* childFrame = GetSelectedFrame();
michael@0	136
michael@0	137	if (mInvalidMarkup) {
michael@0	138	return ReflowError(aRenderingContext, aDesiredSize);
michael@0	139	}
michael@0	140
michael@0	141	aDesiredSize.Width() = aDesiredSize.Height() = 0;
michael@0	142	aDesiredSize.SetTopAscent(0);
michael@0	143	mBoundingMetrics = nsBoundingMetrics();
michael@0	144	if (childFrame) {
michael@0	145	GetReflowAndBoundingMetricsFor(childFrame, aDesiredSize, mBoundingMetrics);
michael@0	146	if (aPlaceOrigin) {
michael@0	147	FinishReflowChild(childFrame, PresContext(), aDesiredSize, nullptr, 0, 0, 0);
michael@0	148	}
michael@0	149	mReference.x = 0;
michael@0	150	mReference.y = aDesiredSize.TopAscent();
michael@0	151	}
michael@0	152	aDesiredSize.mBoundingMetrics = mBoundingMetrics;
michael@0	153	return NS_OK;
michael@0	154	}