Bug 1241932 - Expose decoded CSS grid track properties in a Chrome AP…

…I. r=heycam, r=khuey

dom/base/Element.cpp

@@ -16,6 +16,7 @@
 #include "mozilla/DebugOnly.h"
 #include "mozilla/dom/Animation.h"
 #include "mozilla/dom/Attr.h"
+#include "mozilla/dom/Grid.h"
 #include "nsDOMAttributeMap.h"
 #include "nsIAtom.h"
 #include "nsIContentInlines.h"
@@ -953,7 +954,6 @@ Element::GetClientRects()
   return rectList.forget();
 }
 
-
 //----------------------------------------------------------------------
 
 void
@@ -3289,6 +3289,21 @@ Element::MozRequestPointerLock()
   OwnerDoc()->RequestPointerLock(this);
 }
 
+void
+Element::GetGridFragments(nsTArray<RefPtr<Grid>>& aResult)
+{
+  nsIFrame* frame = GetPrimaryFrame();
+  if (frame && (frame->GetType() == nsGkAtoms::gridContainerFrame)) {
+    // If primary frame is a nsGridContainerFrame, all the next frames
+    // in flow will also be nsGridContainerFrame.
+    for (; frame != nullptr; frame = frame->GetNextInFlow()) {
+      aResult.AppendElement(
+        new Grid(this, static_cast<nsGridContainerFrame*>(frame))
+      );
+    }
+  }
+}
+
 already_AddRefed<Animation>
 Element::Animate(JSContext* aContext,
                  JS::Handle<JSObject*> aKeyframes,

dom/base/Element.h

@@ -140,6 +140,7 @@ class UndoManager;
 class DOMRect;
 class DOMRectList;
 class DestinationInsertionPointList;
+class Grid;
 
 // IID for the dom::Element interface
 #define NS_ELEMENT_IID \
@@ -830,6 +831,8 @@ class Element : public FragmentOrElement
            0;
   }
 
+  void GetGridFragments(nsTArray<RefPtr<Grid>>& aResult);
+
   virtual already_AddRefed<UndoManager> GetUndoManager()
   {
     return nullptr;

dom/bindings/moz.build

@@ -74,6 +74,7 @@ LOCAL_INCLUDES += [
     '/dom/xul',
     '/js/xpconnect/src',
     '/js/xpconnect/wrappers',
+    '/layout/generic',
     '/layout/style',
     '/layout/xul/tree',
     '/media/mtransport',

dom/grid/Grid.cpp

@@ -0,0 +1,65 @@
+/* -*- 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 "GridDimension.h"
+#include "mozilla/dom/GridBinding.h"
+#include "nsGridContainerFrame.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Grid, mParent, mRows, mCols)
+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");
+
+  const ComputedGridTrackInfo* rowTrackInfo = aFrame->GetComputedTemplateRows();
+  mRows->SetTrackInfo(rowTrackInfo);
+  mRows->SetLineInfo(rowTrackInfo);
+
+  const ComputedGridTrackInfo* colTrackInfo = aFrame->GetComputedTemplateColumns();
+  mCols->SetTrackInfo(colTrackInfo);
+  mCols->SetLineInfo(colTrackInfo);
+}
+
+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;
+}
+
+} // namespace dom
+} // namespace mozilla

dom/grid/Grid.h

@@ -0,0 +1,51 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_Grid_h
+#define mozilla_dom_Grid_h
+
+#include "mozilla/dom/Element.h"
+#include "nsGridContainerFrame.h"
+#include "nsISupports.h"
+#include "nsWrapperCache.h"
+
+namespace mozilla {
+namespace dom {
+
+class GridDimension;
+
+class Grid : public nsISupports
+           , public nsWrapperCache
+{
+public:
+  Grid(nsISupports* aParent, nsGridContainerFrame* aFrame);
+
+protected:
+  virtual ~Grid();
+
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Grid)
+
+  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+  Element* GetParentObject()
+  {
+    return mParent;
+  }
+
+  GridDimension* Rows() const;
+  GridDimension* Cols() const;
+
+protected:
+  nsCOMPtr<Element> mParent;
+  RefPtr<GridDimension> mRows;
+  RefPtr<GridDimension> mCols;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* mozilla_dom_Grid_h */

dom/grid/GridDimension.cpp

@@ -0,0 +1,69 @@
+/* -*- 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 "GridDimension.h"
+
+#include "Grid.h"
+#include "GridLines.h"
+#include "GridTracks.h"
+#include "mozilla/dom/GridBinding.h"
+#include "nsGridContainerFrame.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(GridDimension, mParent, mLines, mTracks)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(GridDimension)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(GridDimension)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GridDimension)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+GridDimension::GridDimension(Grid* aParent)
+  : mParent(aParent)
+  , mLines(new GridLines(this))
+  , mTracks(new GridTracks(this))
+{
+  MOZ_ASSERT(aParent, "Should never be instantiated with a null Grid");
+}
+
+GridDimension::~GridDimension()
+{
+}
+
+JSObject*
+GridDimension::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return GridDimensionBinding::Wrap(aCx, this, aGivenProto);
+}
+
+GridLines*
+GridDimension::Lines() const
+{
+  return mLines;
+}
+
+GridTracks*
+GridDimension::Tracks() const
+{
+  return mTracks;
+}
+
+void
+GridDimension::SetTrackInfo(const ComputedGridTrackInfo* aTrackInfo)
+{
+  mTracks->SetTrackInfo(aTrackInfo);
+}
+
+void
+GridDimension::SetLineInfo(const ComputedGridTrackInfo* aTrackInfo)
+{
+  mLines->SetLineInfo(aTrackInfo);
+}
+
+} // namespace dom
+} // namespace mozilla

dom/grid/GridDimension.h

@@ -0,0 +1,56 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_GridDimension_h
+#define mozilla_dom_GridDimension_h
+
+#include "nsWrapperCache.h"
+
+namespace mozilla {
+
+struct ComputedGridTrackInfo;
+
+namespace dom {
+
+class Grid;
+class GridLines;
+class GridTracks;
+
+class GridDimension : public nsISupports
+                    , public nsWrapperCache
+{
+public:
+  GridDimension(Grid* aParent);
+
+protected:
+  virtual ~GridDimension();
+
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(GridDimension)
+
+  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+  Grid* GetParentObject()
+  {
+    return mParent;
+  }
+
+  GridLines* Lines() const;
+  GridTracks* Tracks() const;
+
+  void SetTrackInfo(const ComputedGridTrackInfo* aTrackInfo);
+  void SetLineInfo(const ComputedGridTrackInfo* aTrackInfo);
+
+protected:
+  RefPtr<Grid> mParent;
+  RefPtr<GridLines> mLines;
+  RefPtr<GridTracks> mTracks;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* mozilla_dom_GridDimension_h */

dom/grid/GridLine.cpp

@@ -0,0 +1,79 @@
+/* -*- 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 "GridLine.h"
+
+#include "GridLines.h"
+#include "mozilla/dom/GridBinding.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(GridLine, mParent)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(GridLine)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(GridLine)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GridLine)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+GridLine::GridLine(GridLines *aParent)
+  : mParent(aParent)
+  , mStart(0.0)
+  , mBreadth(0.0)
+  , mNumber(0)
+{
+  MOZ_ASSERT(aParent, "Should never be instantiated with a null GridLines");
+}
+
+GridLine::~GridLine()
+{
+}
+
+void
+GridLine::GetNames(nsTArray<nsString>& aNames) const
+{
+  aNames = mNames;
+}
+
+JSObject*
+GridLine::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return GridLineBinding::Wrap(aCx, this, aGivenProto);
+}
+
+double
+GridLine::Start() const
+{
+  return mStart;
+}
+
+double
+GridLine::Breadth() const
+{
+  return mBreadth;
+}
+
+uint32_t
+GridLine::Number() const
+{
+  return mNumber;
+}
+
+void
+GridLine::SetLineValues(double aStart,
+                        double aBreadth,
+                        uint32_t aNumber,
+                        const nsTArray<nsString>& aNames)
+{
+  mStart = aStart;
+  mBreadth = aBreadth;
+  mNumber = aNumber;
+  mNames = aNames;
+}
+
+} // namespace dom
+} // namespace mozilla