static Node*
findLastFocusableNode(Frame* frame, const IntRect* specificRect)
{
#if PLATFORM(WKC)
CRASH_IF_STACK_OVERFLOW(WKC_STACK_MARGIN_DEFAULT);
#endif
Node* node = frame->document()->lastChild();
while (node) {
if (!isNodeInSpecificRect(node, specificRect)) {
node = node->traversePreviousNodePostOrder();
continue;
}
if (node->isFrameOwnerElement()) {
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node);
if (owner->contentFrame()) {
node = findLastFocusableNode(owner->contentFrame(), specificRect);
if (node)
break;
node = owner;
}
} else if (isScrollableContainerNode(node) && !node->renderer()->isTextArea()) {
node = node->lastChild();
}
if (node->isFocusable() && !node->isFrameOwnerElement()) {
break;
}
node = node->traversePreviousNodePostOrder();
}
if (node) {
return node->isFocusable() ? node : 0;
}
return 0;
}
bool InspectorBackend::addSourceToFrame(const String& mimeType, const String& source, Node* frameNode)
{
ASSERT_ARG(frameNode, frameNode);
if (!frameNode)
return false;
if (!frameNode->attached()) {
ASSERT_NOT_REACHED();
return false;
}
ASSERT(frameNode->isElementNode());
if (!frameNode->isElementNode())
return false;
Element* element = static_cast<Element*>(frameNode);
ASSERT(element->isFrameOwnerElement());
if (!element->isFrameOwnerElement())
return false;
HTMLFrameOwnerElement* frameOwner = static_cast<HTMLFrameOwnerElement*>(element);
ASSERT(frameOwner->contentFrame());
if (!frameOwner->contentFrame())
return false;
FrameLoader* loader = frameOwner->contentFrame()->loader();
loader->setResponseMIMEType(mimeType);
loader->begin();
loader->write(source);
loader->end();
return true;
}
// intersectingRegions and remainingFingerRegion are all in main frame contents coordinates,
// even on recursive calls of ::findIntersectingRegions.
bool FatFingers::findIntersectingRegions(Document* document,
Vector<IntersectingRegion>& intersectingRegions, Platform::IntRectRegion& remainingFingerRegion)
{
if (!document || !document->frame()->view())
return false;
// The layout needs to be up-to-date to determine if a node is focusable.
document->updateLayoutIgnorePendingStylesheets();
// Create fingerRect.
IntPoint frameContentPos(document->frame()->view()->windowToContents(m_webPage->m_mainFrame->view()->contentsToWindow(m_contentPos)));
#if DEBUG_FAT_FINGERS
IntRect fingerRect(fingerRectForPoint(frameContentPos));
IntRect screenFingerRect = m_webPage->mapToTransformed(fingerRect);
log(LogLevelInfo, "fat finger rect now %d, %d, %d, %d", screenFingerRect.x(), screenFingerRect.y(), screenFingerRect.width(), screenFingerRect.height());
// only record the first finger rect
if (document == m_webPage->m_mainFrame->document())
m_debugFatFingerRect = m_webPage->mapToTransformed(m_webPage->mapFromContentsToViewport(fingerRect));
#endif
bool foundOne = false;
RenderLayer* lowestPositionedEnclosingLayerSoFar = 0;
// Iterate over the list of nodes (and subrects of nodes where possible), for each saving the
// intersection of the bounding box with the finger rect.
ListHashSet<RefPtr<Node> > intersectedNodes;
getNodesFromRect(document, frameContentPos, intersectedNodes);
ListHashSet<RefPtr<Node> >::const_iterator it = intersectedNodes.begin();
ListHashSet<RefPtr<Node> >::const_iterator end = intersectedNodes.end();
for ( ; it != end; ++it) {
Node* curNode = (*it).get();
if (!curNode || !curNode->renderer())
continue;
if (remainingFingerRegion.isEmpty())
break;
bool isElement = curNode->isElementNode();
if (isElement && isValidFrameOwner(toElement(curNode))) {
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(curNode);
Document* childDocument = owner && owner->contentFrame() ? owner->contentFrame()->document() : 0;
if (!childDocument)
continue;
ASSERT(childDocument->frame()->view());
foundOne |= findIntersectingRegions(childDocument, intersectingRegions, remainingFingerRegion);
} else if (isElement && m_targetType == ClickableElement) {
foundOne |= checkForClickableElement(toElement(curNode), intersectingRegions, remainingFingerRegion, lowestPositionedEnclosingLayerSoFar);
} else if (m_targetType == Text)
foundOne |= checkForText(curNode, intersectingRegions, remainingFingerRegion);
}
return foundOne;
}
Node* FocusController::deepFocusableNode(FocusDirection direction, Node* node, KeyboardEvent* event)
{
// The node we found might be a HTMLFrameOwnerElement or a shadow host, so descend down the tree until we find either:
// 1) a focusable node, or
// 2) the deepest-nested HTMLFrameOwnerElement or shadow host.
while (isTreeScopeOwner(node)) {
Node* foundNode;
if (node->isFrameOwnerElement()) {
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node);
if (!owner->contentFrame())
break;
Document* document = owner->contentFrame()->document();
foundNode = findFocusableNode(direction, document, 0, event);
} else {
ASSERT(shadowRoot(node));
// FIXME: Some elements (e.g. HTMLInputElement and HTMLTextAreaElement) do extra work in their focus() methods.
// Skipping these elements is the safest fix until we find a better way.
if (node->hasTagName(inputTag) || node->hasTagName(textareaTag))
break;
foundNode = findFocusableNode(direction, shadowRoot(node), 0, event);
}
if (!foundNode)
break;
ASSERT(node != foundNode);
node = foundNode;
}
return node;
}
void FocusController::deepFindFocusableNodeInDirection(Node* focusedNode, Node* candidate, FocusDirection direction, KeyboardEvent* event, FocusCandidate& closestFocusCandidate)
{
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(candidate);
if (!owner->contentFrame())
return;
Document* innerDocument = owner->contentFrame()->document();
if (!innerDocument)
return;
if (innerDocument == focusedNode->document())
findFocusableNodeInDirection(innerDocument, focusedNode, direction, event, closestFocusCandidate);
else {
// Check if the current {i}frame element itself is a good candidate
// to move focus to. If it is, then we traverse its inner nodes.
// Lets pass a copy of the best candidate, to not get fooled by a
// frame without focusable elements.
FocusCandidate focusCandidateCopy = closestFocusCandidate;
long long distance = distanceInDirection(focusedNode, candidate, direction, focusCandidateCopy);
if (distance < focusCandidateCopy.distance) {
focusCandidateCopy.parentAlignment = focusCandidateCopy.alignment;
focusCandidateCopy.parentDistance = distance;
findFocusableNodeInDirection(innerDocument, focusedNode, direction, event, focusCandidateCopy);
// If we really have an inner closer focus candidate node, take it.
if (closestFocusCandidate.node != focusCandidateCopy.node)
closestFocusCandidate = focusCandidateCopy;
}
}
}
void FocusController::findHorizontallyFocusableNodeInRect(FocusDirection direction, Node* start, KeyboardEvent* event, const IntRect* rect, Node** candidateNode, IntRect& candidateNodeRect)
{
#if PLATFORM(WKC)
CRASH_IF_STACK_OVERFLOW(WKC_STACK_MARGIN_DEFAULT);
#endif
// ASSERT(direction == FocusDirectionLeft || direction == FocusDirectionRight);
if (!start)
return ;
Node* node = start;
HTMLFrameOwnerElement* owner;
Document* document;
IntRect nodeRect;
while (node) {
if (!isNodeInSpecificRect(node, rect)) {
node = getClosestNode(node, direction);
continue;
}
owner = 0;
if (node->isFrameOwnerElement()) {
owner = static_cast<HTMLFrameOwnerElement*>(node);
if (!owner->contentFrame()) {
*candidateNode = 0;
return;
}
document = owner->contentFrame()->document();
findHorizontallyFocusableNodeInRect(direction, document, event, rect, candidateNode, candidateNodeRect);
} else if (isScrollableContainerNode(node) && !node->renderer()->isTextArea()) {
findHorizontallyFocusableNodeInRect(direction, node->firstChild(), event, rect, candidateNode, candidateNodeRect);
} else {
if (node->isFocusable() && !node->isFrameOwnerElement()) {
nodeRect = node->renderer()->absoluteBoundingBoxRect();
FrameView* frameView = node->document()->view();
if (!frameView) {
*candidateNode = 0;
return;
}
nodeRect = frameView->contentsToWindow(nodeRect);
nodeRect.intersect(*rect);
if (!nodeRect.isEmpty()) {
if (candidateNodeRect.isEmpty()) {
*candidateNode = node;
candidateNodeRect = nodeRect;
}
if (direction == FocusDirectionRight && candidateNodeRect.x() > nodeRect.x()) {
*candidateNode = node;
candidateNodeRect = nodeRect;
} else if (direction == FocusDirectionLeft && candidateNodeRect.x() < nodeRect.x()) {
*candidateNode = node;
candidateNodeRect = nodeRect;
}
}
}
}
node = getClosestNode(node, direction);
}
}
void FocusController::deepFindFocusableNodeInDirection(Node* container, Node* focusedNode,
FocusDirection direction, KeyboardEvent* event,
FocusCandidate& closest)
{
ASSERT(container->hasTagName(frameTag)
|| container->hasTagName(iframeTag)
|| isScrollableContainerNode(container));
// Track if focusedNode is a descendant of the current container node being processed.
bool descendantOfContainer = false;
Node* firstChild = 0;
// Iframe or Frame.
if (container->hasTagName(frameTag) || container->hasTagName(iframeTag)) {
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(container);
if (!owner->contentFrame())
return;
Document* innerDocument = owner->contentFrame()->document();
if (!innerDocument)
return;
descendantOfContainer = isNodeDeepDescendantOfDocument(focusedNode, innerDocument);
firstChild = innerDocument->firstChild();
// Scrollable block elements (e.g. <div>, etc)
} else if (isScrollableContainerNode(container)) {
firstChild = container->firstChild();
descendantOfContainer = focusedNode->isDescendantOf(container);
}
if (descendantOfContainer) {
findFocusableNodeInDirection(firstChild, focusedNode, direction, event, closest);
return;
}
// Check if the current container element itself is a good candidate
// to move focus to. If it is, then we traverse its inner nodes.
FocusCandidate candidateParent = FocusCandidate(container);
distanceDataForNode(direction, focusedNode, candidateParent);
// Bail out if distance is maximum.
if (candidateParent.distance == maxDistance())
return;
// FIXME: Consider alignment?
if (candidateParent.distance < closest.distance)
findFocusableNodeInDirection(firstChild, focusedNode, direction, event, closest, candidateParent);
}
void LocalFrame::createView(const IntSize& viewportSize,
const Color& backgroundColor,
bool transparent,
ScrollbarMode horizontalScrollbarMode,
bool horizontalLock,
ScrollbarMode verticalScrollbarMode,
bool verticalLock) {
ASSERT(this);
ASSERT(page());
bool isLocalRoot = this->isLocalRoot();
if (isLocalRoot && view())
view()->setParentVisible(false);
setView(nullptr);
FrameView* frameView = nullptr;
if (isLocalRoot) {
frameView = FrameView::create(this, viewportSize);
// The layout size is set by WebViewImpl to support @viewport
frameView->setLayoutSizeFixedToFrameSize(false);
} else {
frameView = FrameView::create(this);
}
frameView->setScrollbarModes(horizontalScrollbarMode, verticalScrollbarMode,
horizontalLock, verticalLock);
setView(frameView);
frameView->updateBackgroundRecursively(backgroundColor, transparent);
if (isLocalRoot)
frameView->setParentVisible(true);
// FIXME: Not clear what the right thing for OOPI is here.
if (!ownerLayoutItem().isNull()) {
HTMLFrameOwnerElement* owner = deprecatedLocalOwner();
ASSERT(owner);
// FIXME: OOPI might lead to us temporarily lying to a frame and telling it
// that it's owned by a FrameOwner that knows nothing about it. If we're
// lying to this frame, don't let it clobber the existing widget.
if (owner->contentFrame() == this)
owner->setWidget(frameView);
}
if (owner())
view()->setCanHaveScrollbars(owner()->scrollingMode() !=
ScrollbarAlwaysOff);
}
static Node* deepFocusableNode(FocusDirection direction, Node* node, KeyboardEvent* event)
{
// The node we found might be a HTMLFrameOwnerElement, so descend down the frame tree until we find either:
// 1) a focusable node, or
// 2) the deepest-nested HTMLFrameOwnerElement
while (node && node->isFrameOwnerElement()) {
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node);
if (!owner->contentFrame())
break;
Document* document = owner->contentFrame()->document();
node = (direction == FocusDirectionForward)
? document->nextFocusableNode(0, event)
: document->previousFocusableNode(0, event);
if (!node) {
node = owner;
break;
}
}
return node;
}
bool LayoutPart::requiresAcceleratedCompositing() const
{
// There are two general cases in which we can return true. First, if this is a plugin
// LayoutObject and the plugin has a layer, then we need a layer. Second, if this is
// a LayoutObject with a contentDocument and that document needs a layer, then we need
// a layer.
if (widget() && widget()->isPluginView() && toPluginView(widget())->platformLayer())
return true;
if (!node() || !node()->isFrameOwnerElement())
return false;
HTMLFrameOwnerElement* element = toHTMLFrameOwnerElement(node());
if (element->contentFrame() && element->contentFrame()->isRemoteFrame())
return true;
if (Document* contentDocument = element->contentDocument()) {
if (LayoutView* view = contentDocument->layoutView())
return view->usesCompositing();
}
return false;
}
Node* FocusController::findFocusableNodeDecendingDownIntoFrameDocument(FocusDirection direction, Node* node, KeyboardEvent* event)
{
// The node we found might be a HTMLFrameOwnerElement, so descend down the tree until we find either:
// 1) a focusable node, or
// 2) the deepest-nested HTMLFrameOwnerElement.
while (node && node->isFrameOwnerElement()) {
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node);
if (!owner->contentFrame())
break;
Node* foundNode = findFocusableNode(direction, FocusNavigationScope::focusNavigationScopeOwnedByIFrame(owner), 0, event);
if (!foundNode)
break;
ASSERT(node != foundNode);
node = foundNode;
}
return node;
}
void SerializerMarkupAccumulator::appendCustomAttributes(StringBuilder& out, Element* element, Namespaces* namespaces)
{
if (!element->isFrameOwnerElement())
return;
HTMLFrameOwnerElement* frameOwner = static_cast<HTMLFrameOwnerElement*>(element);
Frame* frame = frameOwner->contentFrame();
if (!frame)
return;
KURL url = frame->document()->url();
if (url.isValid() && !url.protocolIs("about"))
return;
// We need to give a fake location to blank frames so they can be referenced by the serialized frame.
url = m_serializer->urlForBlankFrame(frame);
appendAttribute(out, element, Attribute(frameOwnerURLAttributeName(*frameOwner), url.string()), namespaces);
}
Node* FocusController::findVerticallyFocusableNodeInRect(FocusDirection direction, Node* start, KeyboardEvent* event, const IntRect* rect)
{
#if PLATFORM(WKC)
CRASH_IF_STACK_OVERFLOW(WKC_STACK_MARGIN_DEFAULT);
#endif
ASSERT(direction == FocusDirectionUp || direction == FocusDirectionDown);
if (!start)
return 0;
Node* node = start;
HTMLFrameOwnerElement* owner;
Document* document;
while (node) {
if (!isNodeInSpecificRect(node, rect)) {
node = getClosestNode(node, direction);
continue;
}
owner = 0;
if (node->isFrameOwnerElement()) {
owner = static_cast<HTMLFrameOwnerElement*>(node);
if (!owner->contentFrame()) {
node = 0;
break;
}
document = owner->contentFrame()->document();
if (direction == FocusDirectionUp) {
node = findVerticallyFocusableNodeInRect(direction, document->lastChild(), event, rect);
} else {
node = findVerticallyFocusableNodeInRect(direction, document->firstChild(), event, rect);
}
if (node)
break;
node = getClosestNode(owner, direction);
continue;
} else if (isScrollableContainerNode(node) && !node->renderer()->isTextArea()) {
Node* childNode = 0;
if (direction == FocusDirectionUp) {
childNode = findVerticallyFocusableNodeInRect(direction, node->lastChild(), event, rect);
} else {
ASSERT(direction == FocusDirectionDown);
childNode = findVerticallyFocusableNodeInRect(direction, node->firstChild(), event, rect);
}
if (!childNode) {
node = getClosestNode(node, direction, true);
if (!node)
break;
} else {
node = childNode;
break;
}
}
if (node->isFocusable() && !node->isFrameOwnerElement()) {
break;
}
if (owner) {
node = owner;
}
node = getClosestNode(node, direction);
}
return node;
}
bool FocusController::advanceFocusInDocumentOrder(FocusDirection direction, KeyboardEvent* event, bool initialFocus)
{
Frame* frame = focusedOrMainFrame();
ASSERT(frame);
Document* document = frame->document();
Node* currentNode = document->focusedNode();
// FIXME: Not quite correct when it comes to focus transitions leaving/entering the WebView itself
bool caretBrowsing = frame->settings() && frame->settings()->caretBrowsingEnabled();
if (caretBrowsing && !currentNode)
currentNode = frame->selection()->start().deprecatedNode();
document->updateLayoutIgnorePendingStylesheets();
RefPtr<Node> node = findFocusableNodeAcrossFocusScope(direction, FocusNavigationScope::focusNavigationScopeOf(currentNode ? currentNode : document), currentNode, event);
if (!node) {
// We didn't find a node to focus, so we should try to pass focus to Chrome.
if (!initialFocus && m_page->chrome()->canTakeFocus(direction)) {
document->setFocusedNode(0);
setFocusedFrame(0);
m_page->chrome()->takeFocus(direction);
return true;
}
// Chrome doesn't want focus, so we should wrap focus.
node = findFocusableNodeRecursively(direction, FocusNavigationScope::focusNavigationScopeOf(m_page->mainFrame()->document()), 0, event);
node = findFocusableNodeDecendingDownIntoFrameDocument(direction, node.get(), event);
if (!node)
return false;
}
ASSERT(node);
if (node == document->focusedNode())
// Focus wrapped around to the same node.
return true;
if (!node->isElementNode())
// FIXME: May need a way to focus a document here.
return false;
if (node->isFrameOwnerElement() && (!node->isPluginElement() || !node->isKeyboardFocusable(event))) {
// We focus frames rather than frame owners.
// FIXME: We should not focus frames that have no scrollbars, as focusing them isn't useful to the user.
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node.get());
if (!owner->contentFrame())
return false;
document->setFocusedNode(0);
setFocusedFrame(owner->contentFrame());
return true;
}
// FIXME: It would be nice to just be able to call setFocusedNode(node) here, but we can't do
// that because some elements (e.g. HTMLInputElement and HTMLTextAreaElement) do extra work in
// their focus() methods.
Document* newDocument = node->document();
if (newDocument != document)
// Focus is going away from this document, so clear the focused node.
document->setFocusedNode(0);
if (newDocument)
setFocusedFrame(newDocument->frame());
if (caretBrowsing) {
Position position = firstPositionInOrBeforeNode(node.get());
VisibleSelection newSelection(position, position, DOWNSTREAM);
if (frame->selection()->shouldChangeSelection(newSelection))
frame->selection()->setSelection(newSelection);
}
static_cast<Element*>(node.get())->focus(false);
return true;
}
bool FocusController::advanceFocus(FocusDirection direction, KeyboardEvent* event, bool initialFocus)
{
Frame* frame = focusedOrMainFrame();
ASSERT(frame);
Document* document = frame->document();
Node* currentNode = document->focusedNode();
// FIXME: Not quite correct when it comes to focus transitions leaving/entering the WebView itself
bool caretBrowsing = focusedOrMainFrame()->settings()->caretBrowsingEnabled();
if (caretBrowsing && !currentNode)
currentNode = frame->selection()->start().node();
document->updateLayoutIgnorePendingStylesheets();
Node* node = (direction == FocusDirectionForward)
? document->nextFocusableNode(currentNode, event)
: document->previousFocusableNode(currentNode, event);
// If there's no focusable node to advance to, move up the frame tree until we find one.
while (!node && frame) {
Frame* parentFrame = frame->tree()->parent();
if (!parentFrame)
break;
Document* parentDocument = parentFrame->document();
HTMLFrameOwnerElement* owner = frame->ownerElement();
if (!owner)
break;
node = (direction == FocusDirectionForward)
? parentDocument->nextFocusableNode(owner, event)
: parentDocument->previousFocusableNode(owner, event);
frame = parentFrame;
}
node = deepFocusableNode(direction, node, event);
if (!node) {
// We didn't find a node to focus, so we should try to pass focus to Chrome.
if (!initialFocus && m_page->chrome()->canTakeFocus(direction)) {
document->setFocusedNode(0);
setFocusedFrame(0);
m_page->chrome()->takeFocus(direction);
return true;
}
// Chrome doesn't want focus, so we should wrap focus.
Document* d = m_page->mainFrame()->document();
node = (direction == FocusDirectionForward)
? d->nextFocusableNode(0, event)
: d->previousFocusableNode(0, event);
node = deepFocusableNode(direction, node, event);
if (!node)
return false;
}
ASSERT(node);
if (node == document->focusedNode())
// Focus wrapped around to the same node.
return true;
if (!node->isElementNode())
// FIXME: May need a way to focus a document here.
return false;
if (node->isFrameOwnerElement()) {
// We focus frames rather than frame owners.
// FIXME: We should not focus frames that have no scrollbars, as focusing them isn't useful to the user.
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node);
if (!owner->contentFrame())
return false;
document->setFocusedNode(0);
setFocusedFrame(owner->contentFrame());
return true;
}
// FIXME: It would be nice to just be able to call setFocusedNode(node) here, but we can't do
// that because some elements (e.g. HTMLInputElement and HTMLTextAreaElement) do extra work in
// their focus() methods.
Document* newDocument = node->document();
if (newDocument != document)
// Focus is going away from this document, so clear the focused node.
document->setFocusedNode(0);
if (newDocument)
setFocusedFrame(newDocument->frame());
if (caretBrowsing) {
VisibleSelection newSelection(Position(node, 0), Position(node, 0), DOWNSTREAM);
if (frame->shouldChangeSelection(newSelection))
frame->selection()->setSelection(newSelection);
}
static_cast<Element*>(node)->focus(false);
return true;
}
static JSValueRef addSourceToFrame(JSContextRef ctx, JSObjectRef /*function*/, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* /*exception*/)
{
JSValueRef undefined = JSValueMakeUndefined(ctx);
InspectorController* controller = reinterpret_cast<InspectorController*>(JSObjectGetPrivate(thisObject));
if (argumentCount < 2 || !controller)
return undefined;
JSValueRef identifierValue = arguments[0];
if (!JSValueIsNumber(ctx, identifierValue))
return undefined;
unsigned long identifier = static_cast<unsigned long>(JSValueToNumber(ctx, identifierValue, 0));
RefPtr<InspectorResource> resource = controller->resources().get(identifier);
ASSERT(resource);
if (!resource)
return undefined;
RefPtr<SharedBuffer> buffer;
if (resource->requestURL == resource->loader->requestURL())
buffer = resource->loader->mainResourceData();
else {
FrameLoader* frameLoader = resource->loader->frameLoader();
if (!frameLoader)
return undefined;
Document* doc = frameLoader->frame()->document();
if (!doc)
return undefined;
CachedResource* cachedResource = doc->docLoader()->cachedResource(resource->requestURL.url());
if (!cachedResource)
return undefined;
buffer = cachedResource->data();
}
if (!buffer)
return undefined;
String textEncodingName = resource->loader->overrideEncoding();
if (!textEncodingName)
textEncodingName = resource->textEncodingName;
TextEncoding encoding(textEncodingName);
if (!encoding.isValid())
encoding = WindowsLatin1Encoding();
String sourceString = encoding.decode(buffer->data(), buffer->size());
Node* node = toNode(toJS(arguments[1]));
ASSERT(node);
if (!node)
return undefined;
if (!node->attached()) {
ASSERT_NOT_REACHED();
return undefined;
}
ASSERT(node->isElementNode());
if (!node->isElementNode())
return undefined;
Element* element = static_cast<Element*>(node);
ASSERT(element->isFrameOwnerElement());
if (!element->isFrameOwnerElement())
return undefined;
HTMLFrameOwnerElement* frameOwner = static_cast<HTMLFrameOwnerElement*>(element);
ASSERT(frameOwner->contentFrame());
if (!frameOwner->contentFrame())
return undefined;
FrameLoader* loader = frameOwner->contentFrame()->loader();
loader->setResponseMIMEType(resource->mimeType);
loader->begin();
loader->write(sourceString);
loader->end();
return undefined;
}