C++ (Cpp) InlineTextBox::frameRect示例

示例#1

// Bounds of the LayoutObject relative to the scroller's visible content rect.
static LayoutRect relativeBounds(const LayoutObject* layoutObject,
                                 const ScrollableArea* scroller) {
  LayoutRect localBounds;
  if (layoutObject->isBox()) {
    localBounds = toLayoutBox(layoutObject)->borderBoxRect();
    if (!layoutObject->hasOverflowClip()) {
      // borderBoxRect doesn't include overflow content and floats.
      LayoutUnit maxHeight =
          std::max(localBounds.height(),
                   toLayoutBox(layoutObject)->layoutOverflowRect().height());
      if (layoutObject->isLayoutBlockFlow() &&
          toLayoutBlockFlow(layoutObject)->containsFloats()) {
        // Note that lowestFloatLogicalBottom doesn't include floating
        // grandchildren.
        maxHeight = std::max(
            maxHeight,
            toLayoutBlockFlow(layoutObject)->lowestFloatLogicalBottom());
      }
      localBounds.setHeight(maxHeight);
    }
  } else if (layoutObject->isText()) {
    // TODO(skobes): Use first and last InlineTextBox only?
    for (InlineTextBox* box = toLayoutText(layoutObject)->firstTextBox(); box;
         box = box->nextTextBox())
      localBounds.unite(box->frameRect());
  } else {
    // Only LayoutBox and LayoutText are supported.
    ASSERT_NOT_REACHED();
  }

  LayoutRect relativeBounds = LayoutRect(
      scroller->localToVisibleContentQuad(FloatRect(localBounds), layoutObject)
          .boundingBox());

  return relativeBounds;
}