1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "Grid.h"
8
9 #include "GridArea.h"
10 #include "GridDimension.h"
11 #include "mozilla/dom/GridBinding.h"
12 #include "nsGridContainerFrame.h"
13
14 namespace mozilla {
15 namespace dom {
16
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Grid,mParent,mRows,mCols,mAreas)17 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Grid, mParent, mRows, mCols, mAreas)
18 NS_IMPL_CYCLE_COLLECTING_ADDREF(Grid)
19 NS_IMPL_CYCLE_COLLECTING_RELEASE(Grid)
20 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Grid)
21 NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
22 NS_INTERFACE_MAP_ENTRY(nsISupports)
23 NS_INTERFACE_MAP_END
24
25 Grid::Grid(nsISupports* aParent,
26 nsGridContainerFrame* aFrame)
27 : mParent(do_QueryInterface(aParent))
28 , mRows(new GridDimension(this))
29 , mCols(new GridDimension(this))
30 {
31 MOZ_ASSERT(aFrame,
32 "Should never be instantiated with a null nsGridContainerFrame");
33
34 // Construct areas first, because lines may need to reference them
35 // to extract additional names for boundary lines.
36
37 // Add implicit areas first. Track the names that we add here, because
38 // we will ignore future explicit areas with the same name.
39 nsTHashtable<nsStringHashKey> namesSeen;
40 nsGridContainerFrame::ImplicitNamedAreas* implicitAreas =
41 aFrame->GetImplicitNamedAreas();
42 if (implicitAreas) {
43 for (auto iter = implicitAreas->Iter(); !iter.Done(); iter.Next()) {
44 auto& areaInfo = iter.Data();
45 namesSeen.PutEntry(areaInfo.mName);
46 GridArea* area = new GridArea(this,
47 areaInfo.mName,
48 GridDeclaration::Implicit,
49 areaInfo.mRowStart,
50 areaInfo.mRowEnd,
51 areaInfo.mColumnStart,
52 areaInfo.mColumnEnd);
53 mAreas.AppendElement(area);
54 }
55 }
56
57 // Add explicit areas next, as long as they don't have the same name
58 // as the implicit areas, because the implicit values override what was
59 // initially available in the explicit areas.
60 nsGridContainerFrame::ExplicitNamedAreas* explicitAreas =
61 aFrame->GetExplicitNamedAreas();
62 if (explicitAreas) {
63 for (auto& areaInfo : *explicitAreas) {
64 if (!namesSeen.Contains(areaInfo.mName)) {
65 GridArea* area = new GridArea(this,
66 areaInfo.mName,
67 GridDeclaration::Explicit,
68 areaInfo.mRowStart,
69 areaInfo.mRowEnd,
70 areaInfo.mColumnStart,
71 areaInfo.mColumnEnd);
72 mAreas.AppendElement(area);
73 }
74 }
75 }
76
77 // Now construct the tracks and lines.
78 const ComputedGridTrackInfo* rowTrackInfo =
79 aFrame->GetComputedTemplateRows();
80 const ComputedGridLineInfo* rowLineInfo =
81 aFrame->GetComputedTemplateRowLines();
82 mRows->SetTrackInfo(rowTrackInfo);
83 mRows->SetLineInfo(rowTrackInfo, rowLineInfo, mAreas, true);
84
85 const ComputedGridTrackInfo* columnTrackInfo =
86 aFrame->GetComputedTemplateColumns();
87 const ComputedGridLineInfo* columnLineInfo =
88 aFrame->GetComputedTemplateColumnLines();
89 mCols->SetTrackInfo(columnTrackInfo);
90 mCols->SetLineInfo(columnTrackInfo, columnLineInfo, mAreas, false);
91 }
92
~Grid()93 Grid::~Grid()
94 {
95 }
96
97 JSObject*
WrapObject(JSContext * aCx,JS::Handle<JSObject * > aGivenProto)98 Grid::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
99 {
100 return GridBinding::Wrap(aCx, this, aGivenProto);
101 }
102
103 GridDimension*
Rows() const104 Grid::Rows() const
105 {
106 return mRows;
107 }
108
109 GridDimension*
Cols() const110 Grid::Cols() const
111 {
112 return mCols;
113 }
114
115 void
GetAreas(nsTArray<RefPtr<GridArea>> & aAreas) const116 Grid::GetAreas(nsTArray<RefPtr<GridArea>>& aAreas) const
117 {
118 aAreas = mAreas;
119 }
120
121 } // namespace dom
122 } // namespace mozilla
123