bool SVGUseElement::buildShadowTree(SVGElement* target, SVGElement* targetInstance, bool foundUse)
{
ASSERT(target);
ASSERT(targetInstance);
// Spec: If the referenced object is itself a 'use', or if there are 'use' subelements within the referenced
// object, the instance tree will contain recursive expansion of the indirect references to form a complete tree.
if (isSVGUseElement(*target)) {
// We only need to track first degree <use> dependencies. Indirect references are handled
// as the invalidation bubbles up the dependency chain.
if (!foundUse && !isStructurallyExternal()) {
addReferenceTo(target);
foundUse = true;
}
} else if (isDisallowedElement(target)) {
return false;
}
targetInstance->setCorrespondingElement(target);
if (EventTargetData* data = target->eventTargetData())
data->eventListenerMap.copyEventListenersNotCreatedFromMarkupToTarget(targetInstance);
for (RefPtrWillBeRawPtr<Node> child = target->firstChild(); child; child = child->nextSibling()) {
// Skip any disallowed element.
if (isDisallowedElement(child.get()))
continue;
RefPtrWillBeRawPtr<Node> newChild = child->cloneNode(false);
targetInstance->appendChild(newChild.get());
if (newChild->isSVGElement()) {
// Enter recursion, appending new instance tree nodes to the "instance" object.
if (!buildShadowTree(toSVGElement(child), toSVGElement(newChild), foundUse))
return false;
}
}
return true;
}
void InsertLineBreakCommand::doApply()
{
deleteSelection();
VisibleSelection selection = endingSelection();
if (!selection.isNonOrphanedCaretOrRange())
return;
VisiblePosition caret(selection.visibleStart());
// FIXME: If the node is hidden, we should still be able to insert text.
// For now, we return to avoid a crash. https://bugs.webkit.org/show_bug.cgi?id=40342
if (caret.isNull())
return;
Position pos(caret.deepEquivalent());
pos = positionAvoidingSpecialElementBoundary(pos);
pos = positionOutsideTabSpan(pos);
RefPtrWillBeRawPtr<Node> nodeToInsert = nullptr;
if (shouldUseBreakElement(pos))
nodeToInsert = HTMLBRElement::create(document());
else
nodeToInsert = document().createTextNode("\n");
// FIXME: Need to merge text nodes when inserting just after or before text.
if (isEndOfParagraph(caret) && !lineBreakExistsAtVisiblePosition(caret)) {
bool needExtraLineBreak = !isHTMLHRElement(*pos.anchorNode()) && !isHTMLTableElement(*pos.anchorNode());
insertNodeAt(nodeToInsert.get(), pos);
if (needExtraLineBreak)
insertNodeBefore(nodeToInsert->cloneNode(false), nodeToInsert);
VisiblePosition endingPosition = createVisiblePosition(positionBeforeNode(nodeToInsert.get()));
setEndingSelection(VisibleSelection(endingPosition, endingSelection().isDirectional()));
} else if (pos.computeEditingOffset() <= caretMinOffset(pos.anchorNode())) {
insertNodeAt(nodeToInsert.get(), pos);
// Insert an extra br or '\n' if the just inserted one collapsed.
if (!isStartOfParagraph(createVisiblePosition(positionBeforeNode(nodeToInsert.get()))))
insertNodeBefore(nodeToInsert->cloneNode(false).get(), nodeToInsert.get());
setEndingSelection(VisibleSelection(positionInParentAfterNode(*nodeToInsert), TextAffinity::Downstream, endingSelection().isDirectional()));
// If we're inserting after all of the rendered text in a text node, or into a non-text node,
// a simple insertion is sufficient.
} else if (!pos.anchorNode()->isTextNode() || pos.computeOffsetInContainerNode() >= caretMaxOffset(pos.anchorNode())) {
insertNodeAt(nodeToInsert.get(), pos);
setEndingSelection(VisibleSelection(positionInParentAfterNode(*nodeToInsert), TextAffinity::Downstream, endingSelection().isDirectional()));
} else if (pos.anchorNode()->isTextNode()) {
// Split a text node
Text* textNode = toText(pos.anchorNode());
splitTextNode(textNode, pos.computeOffsetInContainerNode());
insertNodeBefore(nodeToInsert, textNode);
Position endingPosition = firstPositionInNode(textNode);
// Handle whitespace that occurs after the split
document().updateLayoutIgnorePendingStylesheets();
// TODO(yosin) |isRenderedCharacter()| should be removed, and we should
// use |VisiblePosition::characterAfter()|.
if (!isRenderedCharacter(endingPosition)) {
Position positionBeforeTextNode(positionInParentBeforeNode(*textNode));
// Clear out all whitespace and insert one non-breaking space
deleteInsignificantTextDownstream(endingPosition);
ASSERT(!textNode->layoutObject() || textNode->layoutObject()->style()->collapseWhiteSpace());
// Deleting insignificant whitespace will remove textNode if it contains nothing but insignificant whitespace.
if (textNode->inDocument()) {
insertTextIntoNode(textNode, 0, nonBreakingSpaceString());
} else {
RefPtrWillBeRawPtr<Text> nbspNode = document().createTextNode(nonBreakingSpaceString());
insertNodeAt(nbspNode.get(), positionBeforeTextNode);
endingPosition = firstPositionInNode(nbspNode.get());
}
}
setEndingSelection(VisibleSelection(endingPosition, TextAffinity::Downstream, endingSelection().isDirectional()));
}
// Handle the case where there is a typing style.
RefPtrWillBeRawPtr<EditingStyle> typingStyle = document().frame()->selection().typingStyle();
if (typingStyle && !typingStyle->isEmpty()) {
// Apply the typing style to the inserted line break, so that if the selection
// leaves and then comes back, new input will have the right style.
// FIXME: We shouldn't always apply the typing style to the line break here,
// see <rdar://problem/5794462>.
applyStyle(typingStyle.get(), firstPositionInOrBeforeNode(nodeToInsert.get()), lastPositionInOrAfterNode(nodeToInsert.get()));
// Even though this applyStyle operates on a Range, it still sets an endingSelection().
// It tries to set a VisibleSelection around the content it operated on. So, that VisibleSelection
// will either (a) select the line break we inserted, or it will (b) be a caret just
// before the line break (if the line break is at the end of a block it isn't selectable).
// So, this next call sets the endingSelection() to a caret just after the line break
// that we inserted, or just before it if it's at the end of a block.
setEndingSelection(endingSelection().visibleEnd());
}
rebalanceWhitespace();
}
