tree f5a0471c3b38a8a757c948967583e1fc360cd325
parent e781ea1ed3f62367f4ae5c7e2782dc2afaf492ca
author svillar@igalia.com <svillar@igalia.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1473932736 +0000
committer svillar@igalia.com <svillar@igalia.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1473932736 +0000

[css-grid] Implement fit-content track size
https://bugs.webkit.org/show_bug.cgi?id=161379

Reviewed by Manuel Rego Casasnovas.

Source/WebCore:

This implements the new <fit-content> track size which is defined as follows: "Represents
the formula min(max-content, max(auto, argument)), which is calculated similar to auto
(i.e. minmax(auto, max-content)), except that the track size is clamped at argument if it is
greater than the auto minimum."

From the parsing POV fit-content was implemented as a new type of function which only takes
one argument. That forced us to refactor some code because minmax() was the only allowed
function for <track-size>s so far.

The implementation key is a new attribute in GridTrack called growthLimitCap which is
precisely the single attribute of fit-content(). Some parts of the track sizing algorithm
were adapted to this change like for example the sorting of tracks by growth potential (we
need to consider the caps).

Tests: fast/css-grid-layout/fit-content-columns.html
fast/css-grid-layout/fit-content-rows.html

* css/CSSComputedStyleDeclaration.cpp:
(WebCore::specifiedValueForGridTrackSize): Added support for fit-content sizes.
* css/StyleBuilderConverter.h:
(WebCore::StyleBuilderConverter::createGridTrackSize): Added support for fit-content sizes.
* css/parser/CSSParser.cpp:
(WebCore::isGridTrackFixedSized): Added support for fit-content sizes.
(WebCore::CSSParser::parseGridTrackSize): Added support for parsing fit-content() functions.
* css/parser/CSSPropertyParser.cpp: Added support for parsing fit-content() functions so
it'll be available once we switch to the new parser.
* rendering/RenderGrid.cpp:
(WebCore::GridTrack::baseSize): Just return a LayoutUnit, the return value optimization will
keep it fast in any case.
(WebCore::GridTrack::growthLimit): Ditto.
(WebCore::GridTrack::setGrowthLimit): Added an ASSERT to check that the growth limit is
never higher than the cap.
(WebCore::GridTrack::infiniteGrowthPotential):
(WebCore::GridTrack::plannedSize): Just return a LayoutUnit, the return value optimization will
keep it fast in any case.
(WebCore::GridTrack::tempSize): Just return a LayoutUnit, the return value optimization will
keep it fast in any case.
(WebCore::GridTrack::setTempSize): Added as we no longer return a reference in tempSize().
(WebCore::GridTrack::growTempSize): New utility function which increases the tempSize.
(WebCore::GridTrack::setInfinitelyGrowable):
(WebCore::GridTrack::setGrowthLimitCap): Added.
(WebCore::GridTrack::growthLimitCap): Ditto.
(WebCore::GridTrack::growthLimitIsInfinite): Made private.
(WebCore::RenderGrid::GridSizingData::freeSpace): Renamed from freeSpaceForDirection.
(WebCore::RenderGrid::GridSizingData::availableSpace): We now cache the available space as
it is used to compute relative (percentage) sizes.
(WebCore::RenderGrid::GridSizingData::setAvailableSpace): Ditto.
(WebCore::RenderGrid::GridSizingData::setFreeSpace): Renamed from setFreeSpaceForDirection.
(WebCore::RenderGrid::computeTrackSizesForDirection): Receives the available space instead
of the free space.
(WebCore::RenderGrid::computeIntrinsicLogicalWidths): Properly initialize free and available
spaces.
(WebCore::RenderGrid::computeIntrinsicLogicalHeight): Ditto.
(WebCore::RenderGrid::computeUsedBreadthOfGridTracks): Use available space to initialize the
track sizes. Also use sizingOperation to decide whether or not sizes are indefinite. Last
but not least, added support for fit-content tracks.
(WebCore::RenderGrid::computeUsedBreadthOfMinLength): Pass a GridTrackSize instead of a GridLength.
(WebCore::RenderGrid::computeUsedBreadthOfMaxLength): Ditto.
(WebCore::RenderGrid::gridTrackSize): Added support for fit-content.
(WebCore::RenderGrid::resolveContentBasedTrackSizingFunctions): Ditto.
(WebCore::RenderGrid::resolveContentBasedTrackSizingFunctionsForNonSpanningItems): Ditto.
(WebCore::trackSizeForTrackSizeComputationPhase):
(WebCore::sortByGridTrackGrowthPotential): Reworked the function so it properly sorts tracks
with growth limit caps to support fit-content().
(WebCore::clampGrowthShareIfNeeded): Clamps the given growthShare passed as argument to the
track growth limit cap.
(WebCore::RenderGrid::distributeSpaceToTracks): Use the new setTempSize() method. Also sort
the selected tracks to grow over growth limits in order to respect the track caps eventually
set by fit-content (otherwise those tracks could indefinitely grow over the specified value).
(WebCore::RenderGrid::tracksAreWiderThanMinTrackBreadth): Use the new defined functions.
(WebCore::RenderGrid::applyStretchAlignmentToTracksIfNeeded): Use freeSpace().
(WebCore::RenderGrid::populateGridPositionsForDirection): Ditto.
(WebCore::GridTrack::infinitelyGrowable): Deleted.
(WebCore::RenderGrid::GridSizingData::freeSpaceForDirection): Deleted.
(WebCore::RenderGrid::GridSizingData::setFreeSpaceForDirection): Deleted.
(WebCore::RenderGrid::trackSizeForTrackSizeComputationPhase): Deleted.
* rendering/RenderGrid.h: Changed the signature of some methods. Moved
TrackSizeComputationPhase out of the RenderGrid class.
* rendering/style/GridTrackSize.h:
(WebCore::GridTrackSize::GridTrackSize): Added some extra documentation. Added a new
attribute to the constructor to support fit-content GridTrackSizes.
(WebCore::GridTrackSize::fitContentTrackBreadth): New method which returns the growth limit
cap set by fit-content().
(WebCore::GridTrackSize::minTrackBreadth):
(WebCore::GridTrackSize::isFitContent): Added.
(WebCore::GridTrackSize::length): Deleted.
(WebCore::GridTrackSize::isPercentage): Deleted.

LayoutTests:

New tests to verify that fit-content track sizes work as expected for columns and for
rows. Also added some more test cases to verify that we properly parse fit-content().

* fast/css-grid-layout/fit-content-columns-expected.html: Added.
* fast/css-grid-layout/fit-content-columns.html: Added.
* fast/css-grid-layout/fit-content-rows-expected.html: Added.
* fast/css-grid-layout/fit-content-rows.html: Added.
* fast/css-grid-layout/grid-auto-columns-rows-get-set-expected.txt:
* fast/css-grid-layout/grid-auto-columns-rows-get-set.html:
* fast/css-grid-layout/grid-columns-rows-get-set-expected.txt:
* fast/css-grid-layout/grid-columns-rows-get-set.html:
* fast/css-grid-layout/resources/grid-columns-rows-get-set.js:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@205966 268f45cc-cd09-0410-ab3c-d52691b4dbfc