C++ LayoutObject::isAnonymousBlock方法代码示例

bool LayoutListItem::updateMarkerLocation()
{
    ASSERT(m_marker);

    LayoutObject* markerParent = m_marker->parent();
    LayoutObject* lineBoxParent = getParentOfFirstLineBox(this, m_marker);
    if (!lineBoxParent) {
        // If the marker is currently contained inside an anonymous box, then we
        // are the only item in that anonymous box (since no line box parent was
        // found). It's ok to just leave the marker where it is in this case.
        if (markerParent && markerParent->isAnonymousBlock())
            lineBoxParent = markerParent;
        else
            lineBoxParent = this;
    }

    if (markerParent != lineBoxParent) {
        m_marker->remove();
        lineBoxParent->addChild(m_marker, firstNonMarkerChild(lineBoxParent));
        m_marker->updateMarginsAndContent();
        // If markerParent is an anonymous block with no children, destroy it.
        if (markerParent && markerParent->isAnonymousBlock() && !toLayoutBlock(markerParent)->firstChild() && !toLayoutBlock(markerParent)->continuation())
            markerParent->destroy();
        return true;
    }

    return false;
}

void LayoutRubyBase::moveBlockChildren(LayoutRubyBase* toBase, LayoutObject* beforeChild)
{
    ASSERT(!childrenInline());
    ASSERT_ARG(toBase, toBase);

    if (!firstChild())
        return;

    if (toBase->childrenInline())
        toBase->makeChildrenNonInline();

    // If an anonymous block would be put next to another such block, then merge those.
    LayoutObject* firstChildHere = firstChild();
    LayoutObject* lastChildThere = toBase->lastChild();
    if (firstChildHere->isAnonymousBlock() && firstChildHere->childrenInline()
        && lastChildThere && lastChildThere->isAnonymousBlock() && lastChildThere->childrenInline()) {
        LayoutBlock* anonBlockHere = toLayoutBlock(firstChildHere);
        LayoutBlock* anonBlockThere = toLayoutBlock(lastChildThere);
        anonBlockHere->moveAllChildrenTo(anonBlockThere, anonBlockThere->children());
        anonBlockHere->deleteLineBoxTree();
        anonBlockHere->destroy();
    }
    // Move all remaining children normally.
    moveChildrenTo(toBase, firstChild(), beforeChild);
}

void LayoutRubyBase::moveInlineChildren(LayoutRubyBase* toBase, LayoutObject* beforeChild)
{
    ASSERT(childrenInline());
    ASSERT_ARG(toBase, toBase);

    if (!firstChild())
        return;

    LayoutBlock* toBlock;
    if (toBase->childrenInline()) {
        // The standard and easy case: move the children into the target base
        toBlock = toBase;
    } else {
        // We need to wrap the inline objects into an anonymous block.
        // If toBase has a suitable block, we re-use it, otherwise create a new one.
        LayoutObject* lastChild = toBase->lastChild();
        if (lastChild && lastChild->isAnonymousBlock() && lastChild->childrenInline()) {
            toBlock = toLayoutBlock(lastChild);
        } else {
            toBlock = toBase->createAnonymousBlock();
            toBase->children()->appendChildNode(toBase, toBlock);
        }
    }
    // Move our inline children into the target block we determined above.
    moveChildrenTo(toBlock, firstChild(), beforeChild);
}

bool LayoutListItem::updateMarkerLocation() {
  ASSERT(m_marker);

  LayoutObject* markerParent = m_marker->parent();
  // list-style-position:inside makes the ::marker pseudo an ordinary
  // position:static element that should be attached to LayoutListItem block.
  LayoutObject* lineBoxParent =
      m_marker->isInside() ? this : getParentOfFirstLineBox(this, m_marker);
  if (!lineBoxParent) {
    // If the marker is currently contained inside an anonymous box, then we
    // are the only item in that anonymous box (since no line box parent was
    // found). It's ok to just leave the marker where it is in this case.
    if (markerParent && markerParent->isAnonymousBlock())
      lineBoxParent = markerParent;
    else
      lineBoxParent = this;
  }

  if (markerParent != lineBoxParent) {
    m_marker->remove();
    lineBoxParent->addChild(m_marker, firstNonMarkerChild(lineBoxParent));
    // TODO(rhogan): lineBoxParent and markerParent may be deleted by addChild,
    // so they are not safe to reference here.
    // Once we have a safe way of referencing them delete markerParent if it is
    // an empty anonymous block.
    m_marker->updateMarginsAndContent();
    return true;
  }

  return false;
}