gecko-dev/dom/flex/Flex.cpp

/* -*- 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 "Flex.h"

#include "FlexLine.h"
#include "mozilla/dom/FlexBinding.h"
#include "nsFlexContainerFrame.h"

namespace mozilla {
namespace dom {

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Flex, mParent, mLines)
NS_IMPL_CYCLE_COLLECTING_ADDREF(Flex)
NS_IMPL_CYCLE_COLLECTING_RELEASE(Flex)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Flex)
  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END

Flex::Flex(Element* aParent,
           nsFlexContainerFrame* aFrame)
  : mParent(aParent)
{
  MOZ_ASSERT(aFrame,
    "Should never be instantiated with a null nsFlexContainerFrame");

  // Eagerly create property values from aFrame, because we're not
  // going to keep it around.
  const ComputedFlexContainerInfo* containerInfo =
    aFrame->GetFlexContainerInfo();
  MOZ_ASSERT(containerInfo, "Should only be passed a frame with info.");

  mLines.SetLength(containerInfo->mLines.Length());
  uint32_t index = 0;
  for (auto&& l : containerInfo->mLines) {
    FlexLine* line = new FlexLine(this, &l);
    mLines.ElementAt(index) = line;
    index++;
  }
}

JSObject*
Flex::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
  return FlexBinding::Wrap(aCx, this, aGivenProto);
}

void
Flex::GetLines(nsTArray<RefPtr<FlexLine>>& aResult)
{
  aResult.AppendElements(mLines);
}

} // namespace dom
} // namespace mozilla