зеркало из https://github.com/mozilla/gecko-dev.git
98 строки
3.5 KiB
C++
98 строки
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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