C++ nsIFrame::IsNormalDirection方法代码示例

//.........这里部分代码省略.........

    // 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;
                mChildInfosBefore[mChildInfosBeforeCount].current = isHorizontal ? r.width : r.height;
                mChildInfosBefore[mChildInfosBeforeCount].flex    = flex;
                mChildInfosBefore[mChildInfosBeforeCount].index   = count;
                mChildInfosBefore[mChildInfosBeforeCount].changed = mChildInfosBefore[mChildInfosBeforeCount].current;
                mChildInfosBeforeCount++;
            } else if (count > childIndex && (resizeAfter != Flex || flex > 0)) {
                mChildInfosAfter[mChildInfosAfterCount].childElem = content;
                mChildInfosAfter[mChildInfosAfterCount].min     = isHorizontal ? minSize.width : minSize.height;
                mChildInfosAfter[mChildInfosAfterCount].max     = isHorizontal ? maxSize.width : maxSize.height;
                mChildInfosAfter[mChildInfosAfterCount].current = isHorizontal ? r.width : r.height;
                mChildInfosAfter[mChildInfosAfterCount].flex    = flex;
                mChildInfosAfter[mChildInfosAfterCount].index   = count;
                mChildInfosAfter[mChildInfosAfterCount].changed = mChildInfosAfter[mChildInfosAfterCount].current;
                mChildInfosAfterCount++;
            }
        } 
    }
    
    childBox = childBox->GetNextBox();
    count++;
  }

  if (!mParentBox->IsNormalDirection()) {
    // The before array is really the after array, and the order needs to be reversed.
    // First reverse both arrays.
    Reverse(mChildInfosBefore, mChildInfosBeforeCount);
    Reverse(mChildInfosAfter, mChildInfosAfterCount);

    // Now swap the two arrays.
    nscoord newAfterCount = mChildInfosBeforeCount;
    mChildInfosBeforeCount = mChildInfosAfterCount;
    mChildInfosAfterCount = newAfterCount;
    nsSplitterInfo* temp = mChildInfosAfter;
    mChildInfosAfter = mChildInfosBefore;
    mChildInfosBefore = temp;
  }

  // if resizebefore is not Farthest, reverse the list because the first child
  // in the list is the farthest, and we want the first child to be the closest.
  if (resizeBefore != Farthest)
     Reverse(mChildInfosBefore, mChildInfosBeforeCount);

  // if the resizeafter is the Farthest we must reverse the list because the first child in the list
  // is the closest we want the first child to be the Farthest.
  if (resizeAfter == Farthest)
     Reverse(mChildInfosAfter, mChildInfosAfterCount);

  // grow only applys to the children after. If grow is set then no space should be taken out of any children after
  // us. To do this we just set the size of that list to be 0.
  if (resizeAfter == Grow)
     mChildInfosAfterCount = 0;

  PRInt32 c;
  nsPoint pt = nsLayoutUtils::GetDOMEventCoordinatesRelativeTo(mouseEvent,
                                                               mParentBox);
  if (isHorizontal) {
     c = pt.x;
     mSplitterPos = mOuter->mRect.x;
  } else {
     c = pt.y;
     mSplitterPos = mOuter->mRect.y;
  }

  mDragStart = c;

  //printf("Pressed mDragStart=%d\n",mDragStart);

  nsIPresShell::SetCapturingContent(mOuter->GetContent(), CAPTURE_IGNOREALLOWED);

  return NS_OK;
}