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-rw-r--r--dom/grid/GridTracks.cpp134
1 files changed, 134 insertions, 0 deletions
diff --git a/dom/grid/GridTracks.cpp b/dom/grid/GridTracks.cpp
new file mode 100644
index 000000000..8b607973c
--- /dev/null
+++ b/dom/grid/GridTracks.cpp
@@ -0,0 +1,134 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "GridTracks.h"
+
+#include "GridDimension.h"
+#include "GridTrack.h"
+#include "mozilla/dom/GridBinding.h"
+#include "nsGridContainerFrame.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(GridTracks, mParent, mTracks)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(GridTracks)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(GridTracks)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GridTracks)
+ NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+ NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+GridTracks::GridTracks(GridDimension *aParent)
+ : mParent(aParent)
+{
+ MOZ_ASSERT(aParent,
+ "Should never be instantiated with a null GridDimension");
+}
+
+GridTracks::~GridTracks()
+{
+}
+
+JSObject*
+GridTracks::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+ return GridTracksBinding::Wrap(aCx, this, aGivenProto);
+}
+
+uint32_t
+GridTracks::Length() const
+{
+ return mTracks.Length();
+}
+
+GridTrack*
+GridTracks::Item(uint32_t aIndex)
+{
+ return mTracks.SafeElementAt(aIndex);
+}
+
+GridTrack*
+GridTracks::IndexedGetter(uint32_t aIndex,
+ bool& aFound)
+{
+ aFound = aIndex < mTracks.Length();
+ if (!aFound) {
+ return nullptr;
+ }
+ return mTracks[aIndex];
+}
+
+void
+GridTracks::SetTrackInfo(const ComputedGridTrackInfo* aTrackInfo)
+{
+ // rebuild the tracks based on aTrackInfo
+ mTracks.Clear();
+
+ if (!aTrackInfo) {
+ return;
+ }
+
+ nscoord lastTrackEdge = 0;
+ uint32_t repeatIndex = 0;
+ auto AppendRemovedAutoFits = [this, &aTrackInfo, &lastTrackEdge,
+ &repeatIndex]()
+ {
+ uint32_t numRepeatTracks = aTrackInfo->mRemovedRepeatTracks.Length();
+ // Add in removed auto-fit tracks
+ while (repeatIndex < numRepeatTracks &&
+ aTrackInfo->mRemovedRepeatTracks[repeatIndex]) {
+
+ RefPtr<GridTrack> track = new GridTrack(this);
+ mTracks.AppendElement(track);
+ track->SetTrackValues(
+ nsPresContext::AppUnitsToDoubleCSSPixels(lastTrackEdge),
+ nsPresContext::AppUnitsToDoubleCSSPixels(0),
+ GridDeclaration::Explicit,
+ GridTrackState::Removed
+ );
+ repeatIndex++;
+ }
+ repeatIndex++;
+ };
+
+ for (size_t i = aTrackInfo->mStartFragmentTrack;
+ i < aTrackInfo->mEndFragmentTrack;
+ i++) {
+ if (i >= aTrackInfo->mRepeatFirstTrack) {
+ // Append removed auto-fit tracks, if appropriate. The
+ // AppendRemovedAutoFits function exits early once it has been called
+ // aTrackInfo->mRemovedRepeatTracks.Length() times -- a check we don't
+ // replicate here or at subsequent calling sites.
+ AppendRemovedAutoFits();
+ }
+
+ RefPtr<GridTrack> track = new GridTrack(this);
+ mTracks.AppendElement(track);
+ track->SetTrackValues(
+ nsPresContext::AppUnitsToDoubleCSSPixels(aTrackInfo->mPositions[i]),
+ nsPresContext::AppUnitsToDoubleCSSPixels(aTrackInfo->mSizes[i]),
+ (
+ // Implicit if index is before the first explicit track, or after
+ // the last explicit track.
+ (i < aTrackInfo->mNumLeadingImplicitTracks) ||
+ (i >= aTrackInfo->mNumLeadingImplicitTracks +
+ aTrackInfo->mNumExplicitTracks) ?
+ GridDeclaration::Implicit :
+ GridDeclaration::Explicit
+ ),
+ GridTrackState(aTrackInfo->mStates[i])
+ );
+
+ lastTrackEdge = aTrackInfo->mPositions[i] + aTrackInfo->mSizes[i];
+ }
+
+ // Append any trailing removed auto-fit tracks.
+ AppendRemovedAutoFits();
+}
+
+} // namespace dom
+} // namespace mozilla