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6ed8680108
The style system already atomizes all CustomIdent values, which means that we're just wasting memory and CPU by doing string copies all over the place. This patch fixes it. This also simplifies further changes to use as much of the rust data structures as possible. I had to switch from nsTHashtable to mozilla::HashTable because the former doesn't handle well non-default-constructible structs (like NamedLine, which now has a StyleAtom, which is not default-constructible). Differential Revision: https://phabricator.services.mozilla.com/D35119 --HG-- extra : moz-landing-system : lando
98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "Grid.h"
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#include "GridArea.h"
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#include "GridDimension.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(Grid, mParent, mRows, mCols, mAreas)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(Grid)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(Grid)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Grid)
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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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Grid::Grid(nsISupports* aParent, nsGridContainerFrame* aFrame)
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: mParent(do_QueryInterface(aParent)),
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mRows(new GridDimension(this)),
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mCols(new GridDimension(this)) {
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MOZ_ASSERT(aFrame,
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"Should never be instantiated with a null nsGridContainerFrame");
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// Construct areas first, because lines may need to reference them
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// to extract additional names for boundary lines.
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// Add implicit areas first. Track the names that we add here, because
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// we will ignore future explicit areas with the same name.
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nsTHashtable<nsRefPtrHashKey<nsAtom>> namesSeen;
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nsGridContainerFrame::ImplicitNamedAreas* implicitAreas =
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aFrame->GetImplicitNamedAreas();
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if (implicitAreas) {
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for (auto iter = implicitAreas->iter(); !iter.done(); iter.next()) {
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auto& areaInfo = iter.get().value();
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namesSeen.PutEntry(areaInfo.name.AsAtom());
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GridArea* area =
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new GridArea(this, areaInfo.name.AsAtom(), GridDeclaration::Implicit,
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areaInfo.rows.start, areaInfo.rows.end,
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areaInfo.columns.start, areaInfo.columns.end);
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mAreas.AppendElement(area);
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}
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}
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// Add explicit areas next, as long as they don't have the same name
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// as the implicit areas, because the implicit values override what was
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// initially available in the explicit areas.
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if (auto* explicitAreas = aFrame->GetExplicitNamedAreas()) {
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for (auto& areaInfo : explicitAreas->AsSpan()) {
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if (!namesSeen.Contains(areaInfo.name.AsAtom())) {
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GridArea* area = new GridArea(
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this, areaInfo.name.AsAtom(), GridDeclaration::Explicit,
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areaInfo.rows.start, areaInfo.rows.end, areaInfo.columns.start,
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areaInfo.columns.end);
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mAreas.AppendElement(area);
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}
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}
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}
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// Now construct the tracks and lines.
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const ComputedGridTrackInfo* rowTrackInfo = aFrame->GetComputedTemplateRows();
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const ComputedGridLineInfo* rowLineInfo =
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aFrame->GetComputedTemplateRowLines();
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mRows->SetTrackInfo(rowTrackInfo);
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mRows->SetLineInfo(rowTrackInfo, rowLineInfo, mAreas, true);
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const ComputedGridTrackInfo* columnTrackInfo =
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aFrame->GetComputedTemplateColumns();
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const ComputedGridLineInfo* columnLineInfo =
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aFrame->GetComputedTemplateColumnLines();
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mCols->SetTrackInfo(columnTrackInfo);
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mCols->SetLineInfo(columnTrackInfo, columnLineInfo, mAreas, false);
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}
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Grid::~Grid() {}
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JSObject* Grid::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
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return Grid_Binding::Wrap(aCx, this, aGivenProto);
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}
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GridDimension* Grid::Rows() const { return mRows; }
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GridDimension* Grid::Cols() const { return mCols; }
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void Grid::GetAreas(nsTArray<RefPtr<GridArea>>& aAreas) const {
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aAreas = mAreas;
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}
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} // namespace dom
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} // namespace mozilla
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