/* -*- 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 Grid_Binding::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