C++ nsSplitterFrame::GetContent方法代码示例

void
nsSplitterFrameInner::RemoveListener()
{
  ENSURE_TRUE(mOuter);
  mOuter->GetContent()->
    RemoveEventListenerByIID(static_cast<nsIDOMMouseListener*>(this),
                             NS_GET_IID(nsIDOMMouseListener));
  mOuter->GetContent()->
    RemoveEventListenerByIID(static_cast<nsIDOMMouseMotionListener*>(this),
                             NS_GET_IID(nsIDOMMouseMotionListener));
}

void
nsSplitterFrameInner::AddListener(nsPresContext* aPresContext)
{
  mOuter->GetContent()->
    AddEventListener(NS_LITERAL_STRING("mouseup"), this, false, false);
  mOuter->GetContent()->
    AddEventListener(NS_LITERAL_STRING("mousedown"), this, false, false);
  mOuter->GetContent()->
    AddEventListener(NS_LITERAL_STRING("mousemove"), this, false, false);
  mOuter->GetContent()->
    AddEventListener(NS_LITERAL_STRING("mouseout"), this, false, false);
}

void
nsSplitterFrameInner::RemoveListener()
{
  ENSURE_TRUE(mOuter);
  mOuter->GetContent()->
    RemoveEventListener(NS_LITERAL_STRING("mouseup"), this, false);
  mOuter->GetContent()->
    RemoveEventListener(NS_LITERAL_STRING("mousedown"), this, false);
  mOuter->GetContent()->
    RemoveEventListener(NS_LITERAL_STRING("mousemove"), this, false);
  mOuter->GetContent()->
    RemoveEventListener(NS_LITERAL_STRING("mouseout"), this, false);
}

void
nsSplitterFrameInner::MouseUp(nsPresContext* aPresContext, nsGUIEvent* aEvent)
{
  if (mDragging && mOuter) {
    AdjustChildren(aPresContext);
    AddListener(aPresContext);
    nsIPresShell::SetCapturingContent(nullptr, 0); // XXXndeakin is this needed?
    mDragging = false;
    State newState = GetState(); 
    // if the state is dragging then make it Open.
    if (newState == Dragging)
      mOuter->mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::state, EmptyString(), true);

    mPressed = false;

    // if we dragged then fire a command event.
    if (mDidDrag) {
      nsCOMPtr<nsIDOMXULElement> element = do_QueryInterface(mOuter->GetContent());
      element->DoCommand();
    }

    //printf("MouseUp\n");
  }

  delete[] mChildInfosBefore;
  delete[] mChildInfosAfter;
  mChildInfosBefore = nullptr;
  mChildInfosAfter = nullptr;
  mChildInfosBeforeCount = 0;
  mChildInfosAfterCount = 0;
}

nsSplitterFrameInner::ResizeType
nsSplitterFrameInner::GetResizeBefore()
{
  static nsIContent::AttrValuesArray strings[] =
    {&nsGkAtoms::farthest, &nsGkAtoms::flex, nullptr};
  switch (mOuter->GetContent()->FindAttrValueIn(kNameSpaceID_None,
                                                nsGkAtoms::resizebefore,
                                                strings, eCaseMatters)) {
    case 0: return Farthest;
    case 1: return Flex;
  }
  return Closest;
}

nsresult
nsSplitterFrameInner::MouseDown(nsIDOMEvent* aMouseEvent)
{  
  NS_ENSURE_TRUE(mOuter, NS_OK);
  nsCOMPtr<nsIDOMMouseEvent> mouseEvent(do_QueryInterface(aMouseEvent));
  if (!mouseEvent)
    return NS_OK;

  PRUint16 button = 0;
  mouseEvent->GetButton(&button);

  // only if left button
  if (button != 0)
     return NS_OK;

  if (mOuter->GetContent()->
        AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,
                    nsGkAtoms::_true, eCaseMatters))
    return NS_OK;

  mParentBox = mOuter->GetParentBox();
  if (!mParentBox)
    return NS_OK;

  // get our index
  nsPresContext* outerPresContext = mOuter->PresContext();
  const nsFrameList& siblingList(mParentBox->PrincipalChildList());
  PRInt32 childIndex = siblingList.IndexOf(mOuter);
  // if it's 0 (or not found) then stop right here.
  // It might be not found if we're not in the parent's primary frame list.
  if (childIndex <= 0)
    return NS_OK;

  PRInt32 childCount = siblingList.GetLength();
  // if it's the last index then we need to allow for resizeafter="grow"
  if (childIndex == childCount - 1 && GetResizeAfter() != Grow)
    return NS_OK;

  nsRefPtr<nsRenderingContext> rc =
    outerPresContext->PresShell()->GetReferenceRenderingContext();
  NS_ENSURE_TRUE(rc, NS_ERROR_FAILURE);
  nsBoxLayoutState state(outerPresContext, rc);
  mCurrentPos = 0;
  mPressed = true;

  mDidDrag = false;

  EnsureOrient();
  bool isHorizontal = !mOuter->IsHorizontal();
  
  ResizeType resizeBefore = GetResizeBefore();
  ResizeType resizeAfter  = GetResizeAfter();

  delete[] mChildInfosBefore;
  delete[] mChildInfosAfter;
  mChildInfosBefore = new nsSplitterInfo[childCount];
  mChildInfosAfter  = new nsSplitterInfo[childCount];

  // create info 2 lists. One of the children before us and one after.
  PRInt32 count = 0;
  mChildInfosBeforeCount = 0;
  mChildInfosAfterCount = 0;

  nsIFrame* childBox = mParentBox->GetChildBox();

  while (nullptr != childBox) 
  { 
    nsIContent* content = childBox->GetContent();
    nsIDocument* doc = content->OwnerDoc();
    PRInt32 dummy;
    nsIAtom* atom = doc->BindingManager()->ResolveTag(content, &dummy);

    // skip over any splitters
    if (atom != nsGkAtoms::splitter) { 
        nsSize prefSize = childBox->GetPrefSize(state);
        nsSize minSize = childBox->GetMinSize(state);
        nsSize maxSize = nsBox::BoundsCheckMinMax(minSize, childBox->GetMaxSize(state));
        prefSize = nsBox::BoundsCheck(minSize, prefSize, maxSize);

        mOuter->AddMargin(childBox, minSize);
        mOuter->AddMargin(childBox, prefSize);
        mOuter->AddMargin(childBox, maxSize);

        nscoord flex = childBox->GetFlex(state);

        nsMargin margin(0,0,0,0);
        childBox->GetMargin(margin);
        nsRect r(childBox->GetRect());
        r.Inflate(margin);

        // We need to check for hidden attribute too, since treecols with
        // the hidden="true" attribute are not really hidden, just collapsed
        if (!content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::fixed,
                                  nsGkAtoms::_true, eCaseMatters) &&
            !content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::hidden,
                                  nsGkAtoms::_true, eCaseMatters)) {
            if (count < childIndex && (resizeBefore != Flex || flex > 0)) {
                mChildInfosBefore[mChildInfosBeforeCount].childElem = content;
                mChildInfosBefore[mChildInfosBeforeCount].min     = isHorizontal ? minSize.width : minSize.height;
                mChildInfosBefore[mChildInfosBeforeCount].max     = isHorizontal ? maxSize.width : maxSize.height;
//.........这里部分代码省略.........