1 files changed, 122 insertions, 0 deletions
diff --git a/dom/grid/Grid.cpp b/dom/grid/Grid.cpp
new file mode 100644
index 000000000..d10d8b581
--- /dev/null
+++ b/dom/grid/Grid.cpp
@@ -0,0 +1,122 @@
+/* -*- 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 "Grid.h"
+
+#include "GridArea.h"
+#include "GridDimension.h"
+#include "mozilla/dom/GridBinding.h"
+#include "nsGridContainerFrame.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Grid, mParent, mRows, mCols, mAreas)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(Grid)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(Grid)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Grid)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+Grid::Grid(nsISupports* aParent,
+           nsGridContainerFrame* aFrame)
+  : mParent(do_QueryInterface(aParent))
+  , mRows(new GridDimension(this))
+  , mCols(new GridDimension(this))
+{
+  MOZ_ASSERT(aFrame,
+    "Should never be instantiated with a null nsGridContainerFrame");
+
+  // Construct areas first, because lines may need to reference them
+  // to extract additional names for boundary lines.
+
+  // Add implicit areas first. Track the names that we add here, because
+  // we will ignore future explicit areas with the same name.
+  nsTHashtable<nsStringHashKey> namesSeen;
+  nsGridContainerFrame::ImplicitNamedAreas* implicitAreas =
+    aFrame->GetImplicitNamedAreas();
+  if (implicitAreas) {
+    for (auto iter = implicitAreas->Iter(); !iter.Done(); iter.Next()) {
+      auto& areaInfo = iter.Data();
+      namesSeen.PutEntry(areaInfo.mName);
+      GridArea* area = new GridArea(this,
+                                    areaInfo.mName,
+                                    GridDeclaration::Implicit,
+                                    areaInfo.mRowStart,
+                                    areaInfo.mRowEnd,
+                                    areaInfo.mColumnStart,
+                                    areaInfo.mColumnEnd);
+      mAreas.AppendElement(area);
+    }
+  }
+
+  // Add explicit areas next, as long as they don't have the same name
+  // as the implicit areas, because the implicit values override what was
+  // initially available in the explicit areas.
+  nsGridContainerFrame::ExplicitNamedAreas* explicitAreas =
+    aFrame->GetExplicitNamedAreas();
+  if (explicitAreas) {
+    for (auto& areaInfo : *explicitAreas) {
+      if (!namesSeen.Contains(areaInfo.mName)) {
+        GridArea* area = new GridArea(this,
+                                      areaInfo.mName,
+                                      GridDeclaration::Explicit,
+                                      areaInfo.mRowStart,
+                                      areaInfo.mRowEnd,
+                                      areaInfo.mColumnStart,
+                                      areaInfo.mColumnEnd);
+        mAreas.AppendElement(area);
+      }
+    }
+  }
+
+  // Now construct the tracks and lines.
+  const ComputedGridTrackInfo* rowTrackInfo =
+    aFrame->GetComputedTemplateRows();
+  const ComputedGridLineInfo* rowLineInfo =
+    aFrame->GetComputedTemplateRowLines();
+  mRows->SetTrackInfo(rowTrackInfo);
+  mRows->SetLineInfo(rowTrackInfo, rowLineInfo, mAreas, true);
+
+  const ComputedGridTrackInfo* columnTrackInfo =
+    aFrame->GetComputedTemplateColumns();
+  const ComputedGridLineInfo* columnLineInfo =
+    aFrame->GetComputedTemplateColumnLines();
+  mCols->SetTrackInfo(columnTrackInfo);
+  mCols->SetLineInfo(columnTrackInfo, columnLineInfo, mAreas, false);
+}
+
+Grid::~Grid()
+{
+}
+
+JSObject*
+Grid::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return GridBinding::Wrap(aCx, this, aGivenProto);
+}
+
+GridDimension*
+Grid::Rows() const
+{
+  return mRows;
+}
+
+GridDimension*
+Grid::Cols() const
+{
+  return mCols;
+}
+
+void
+Grid::GetAreas(nsTArray<RefPtr<GridArea>>& aAreas) const
+{
+  aAreas = mAreas;
+}
+
+} // namespace dom
+} // namespace mozilla