зеркало из https://github.com/mozilla/gecko-dev.git
Bug 1373678 Part 1: Reduce grid line numbers by count of leading implicit lines, minimum 0. r=dholbert
MozReview-Commit-ID: 7RdautCGTn4 --HG-- extra : rebase_source : 537ec239115aa322c267a4a1519fe9a2574cc894
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887e56701a
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@ -90,7 +90,9 @@ GridLines::SetLineInfo(const ComputedGridTrackInfo* aTrackInfo,
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for (uint32_t i = aTrackInfo->mStartFragmentTrack;
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i < aTrackInfo->mEndFragmentTrack + 1;
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i++) {
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uint32_t line1Index = i + 1;
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// Since line indexes are 1-based, calculate a 1-based value
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// for this track to simplify some calculations.
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const uint32_t line1Index = i + 1;
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startOfNextTrack = (i < aTrackInfo->mEndFragmentTrack) ?
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aTrackInfo->mPositions[i] :
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@ -139,23 +141,30 @@ GridLines::SetLineInfo(const ComputedGridTrackInfo* aTrackInfo,
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RefPtr<GridLine> line = new GridLine(this);
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mLines.AppendElement(line);
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MOZ_ASSERT(line1Index > 0, "line1Index must be positive.");
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bool isBeforeFirstExplicit =
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(line1Index <= aTrackInfo->mNumLeadingImplicitTracks);
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// Calculate an actionable line number for this line, that could be used
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// in a css grid property to align a grid item or area at that line.
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// For implicit lines that appear before line 1, report a number of 0.
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// We can't report negative indexes, because those have a different
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// meaning in the css grid spec (negative indexes are negative-1-based
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// from the end of the grid decreasing towards the front).
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uint32_t lineNumber = isBeforeFirstExplicit ? 0 :
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(line1Index - aTrackInfo->mNumLeadingImplicitTracks + numAddedLines);
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GridDeclaration lineType =
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(isBeforeFirstExplicit ||
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line1Index > (aTrackInfo->mNumLeadingImplicitTracks +
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aTrackInfo->mNumExplicitTracks + 1))
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? GridDeclaration::Implicit
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: GridDeclaration::Explicit;
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line->SetLineValues(
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lineNames,
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nsPresContext::AppUnitsToDoubleCSSPixels(lastTrackEdge),
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nsPresContext::AppUnitsToDoubleCSSPixels(startOfNextTrack -
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lastTrackEdge),
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line1Index + numAddedLines,
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(
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// Implicit if there are no explicit tracks, or if the index
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// is before the first explicit track, or after
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// a track beyond the last explicit track.
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(aTrackInfo->mNumExplicitTracks == 0) ||
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(i < aTrackInfo->mNumLeadingImplicitTracks) ||
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(i > aTrackInfo->mNumLeadingImplicitTracks +
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aTrackInfo->mNumExplicitTracks) ?
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GridDeclaration::Implicit :
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GridDeclaration::Explicit
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)
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lineNumber,
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lineType
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);
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if (i < aTrackInfo->mEndFragmentTrack) {
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@ -215,11 +224,16 @@ GridLines::AppendRemovedAutoFits(const ComputedGridTrackInfo* aTrackInfo,
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RefPtr<GridLine> line = new GridLine(this);
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mLines.AppendElement(line);
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MOZ_ASSERT(aTrackInfo->mRepeatFirstTrack >=
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aTrackInfo->mNumLeadingImplicitTracks,
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"We shouldn't have a repeat track within the implicit tracks.");
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uint32_t lineNumber = aTrackInfo->mRepeatFirstTrack -
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aTrackInfo->mNumLeadingImplicitTracks + aRepeatIndex + 1;
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line->SetLineValues(
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aLineNames,
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nsPresContext::AppUnitsToDoubleCSSPixels(aLastTrackEdge),
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nsPresContext::AppUnitsToDoubleCSSPixels(0),
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aTrackInfo->mRepeatFirstTrack + aRepeatIndex + 1,
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lineNumber,
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GridDeclaration::Explicit
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);
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