134 lines
3.6 KiB
C++
134 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "GridTracks.h"
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#include "GridDimension.h"
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#include "GridTrack.h"
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#include "mozilla/dom/GridBinding.h"
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#include "nsGridContainerFrame.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(GridTracks, mParent, mTracks)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(GridTracks)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(GridTracks)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GridTracks)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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GridTracks::GridTracks(GridDimension *aParent)
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: mParent(aParent)
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{
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MOZ_ASSERT(aParent,
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"Should never be instantiated with a null GridDimension");
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}
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GridTracks::~GridTracks()
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{
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}
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JSObject*
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GridTracks::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return GridTracksBinding::Wrap(aCx, this, aGivenProto);
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}
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uint32_t
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GridTracks::Length() const
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{
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return mTracks.Length();
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}
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GridTrack*
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GridTracks::Item(uint32_t aIndex)
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{
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return mTracks.SafeElementAt(aIndex);
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}
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GridTrack*
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GridTracks::IndexedGetter(uint32_t aIndex,
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bool& aFound)
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{
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aFound = aIndex < mTracks.Length();
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if (!aFound) {
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return nullptr;
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}
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return mTracks[aIndex];
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}
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void
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GridTracks::SetTrackInfo(const ComputedGridTrackInfo* aTrackInfo)
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{
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// rebuild the tracks based on aTrackInfo
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mTracks.Clear();
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if (!aTrackInfo) {
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return;
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}
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nscoord lastTrackEdge = 0;
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uint32_t repeatIndex = 0;
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auto AppendRemovedAutoFits = [this, &aTrackInfo, &lastTrackEdge,
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&repeatIndex]()
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{
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uint32_t numRepeatTracks = aTrackInfo->mRemovedRepeatTracks.Length();
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// Add in removed auto-fit tracks
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while (repeatIndex < numRepeatTracks &&
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aTrackInfo->mRemovedRepeatTracks[repeatIndex]) {
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RefPtr<GridTrack> track = new GridTrack(this);
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mTracks.AppendElement(track);
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track->SetTrackValues(
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nsPresContext::AppUnitsToDoubleCSSPixels(lastTrackEdge),
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nsPresContext::AppUnitsToDoubleCSSPixels(0),
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GridDeclaration::Explicit,
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GridTrackState::Removed
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);
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repeatIndex++;
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}
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repeatIndex++;
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};
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for (size_t i = aTrackInfo->mStartFragmentTrack;
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i < aTrackInfo->mEndFragmentTrack;
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i++) {
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if (i >= aTrackInfo->mRepeatFirstTrack) {
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// Append removed auto-fit tracks, if appropriate. The
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// AppendRemovedAutoFits function exits early once it has been called
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// aTrackInfo->mRemovedRepeatTracks.Length() times -- a check we don't
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// replicate here or at subsequent calling sites.
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AppendRemovedAutoFits();
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}
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RefPtr<GridTrack> track = new GridTrack(this);
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mTracks.AppendElement(track);
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track->SetTrackValues(
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nsPresContext::AppUnitsToDoubleCSSPixels(aTrackInfo->mPositions[i]),
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nsPresContext::AppUnitsToDoubleCSSPixels(aTrackInfo->mSizes[i]),
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(
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// Implicit if index is before the first explicit track, or after
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// the last explicit track.
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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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GridTrackState(aTrackInfo->mStates[i])
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);
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lastTrackEdge = aTrackInfo->mPositions[i] + aTrackInfo->mSizes[i];
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}
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// Append any trailing removed auto-fit tracks.
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AppendRemovedAutoFits();
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}
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} // namespace dom
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} // namespace mozilla
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