void RenderFrame::layout()
{
FrameView* view = static_cast<FrameView*>(widget());
RenderView* root = view ? view->frame()->contentRenderer() : 0;
// Do not expand frames which has zero width or height
if (!width() || !height() || !root) {
updateWidgetPosition();
if (view)
view->layout();
setNeedsLayout(false);
return;
}
HTMLFrameElementBase* element = static_cast<HTMLFrameElementBase*>(node());
if (element->scrollingMode() == ScrollbarAlwaysOff && !root->isFrameSet()) {
setNeedsLayout(false);
return;
}
// Update the dimensions to get the correct width and height
updateWidgetPosition();
if (root->preferredLogicalWidthsDirty())
root->computePreferredLogicalWidths();
// Expand the frame by setting frame height = content height
setWidth(max(view->contentsWidth() + borderAndPaddingWidth(), width()));
setHeight(max(view->contentsHeight() + borderAndPaddingHeight(), height()));
// Update one more time
updateWidgetPosition();
setNeedsLayout(false);
}
Frame* SubframeLoader::loadSubframe(HTMLFrameOwnerElement* ownerElement, const KURL& url, const String& name, const String& referrer)
{
RefPtr<Frame> protect(m_frame);
bool allowsScrolling = true;
int marginWidth = -1;
int marginHeight = -1;
if (ownerElement->hasTagName(frameTag) || ownerElement->hasTagName(iframeTag)) {
HTMLFrameElementBase* o = static_cast<HTMLFrameElementBase*>(ownerElement);
allowsScrolling = o->scrollingMode() != ScrollbarAlwaysOff;
marginWidth = o->marginWidth();
marginHeight = o->marginHeight();
}
if (!ownerElement->document()->securityOrigin()->canDisplay(url)) {
FrameLoader::reportLocalLoadFailed(m_frame, url.string());
return 0;
}
if (!ownerElement->document()->contentSecurityPolicy()->allowChildFrameFromSource(url))
return 0;
String referrerToUse = SecurityPolicy::generateReferrerHeader(ownerElement->document()->referrerPolicy(), url, referrer);
RefPtr<Frame> frame = m_frame->loader()->client()->createFrame(url, name, ownerElement, referrerToUse, allowsScrolling, marginWidth, marginHeight);
if (!frame) {
m_frame->loader()->checkCallImplicitClose();
return 0;
}
// All new frames will have m_isComplete set to true at this point due to synchronously loading
// an empty document in FrameLoader::init(). But many frames will now be starting an
// asynchronous load of url, so we set m_isComplete to false and then check if the load is
// actually completed below. (Note that we set m_isComplete to false even for synchronous
// loads, so that checkCompleted() below won't bail early.)
// FIXME: Can we remove this entirely? m_isComplete normally gets set to false when a load is committed.
frame->loader()->started();
RenderObject* renderer = ownerElement->renderer();
FrameView* view = frame->view();
if (renderer && renderer->isWidget() && view)
toRenderWidget(renderer)->setWidget(view);
m_frame->loader()->checkCallImplicitClose();
// Some loads are performed synchronously (e.g., about:blank and loads
// cancelled by returning a null ResourceRequest from requestFromDelegate).
// In these cases, the synchronous load would have finished
// before we could connect the signals, so make sure to send the
// completed() signal for the child by hand and mark the load as being
// complete.
// FIXME: In this case the Frame will have finished loading before
// it's being added to the child list. It would be a good idea to
// create the child first, then invoke the loader separately.
if (frame->loader()->state() == FrameStateComplete && !frame->loader()->policyDocumentLoader())
frame->loader()->checkCompleted();
return frame.get();
}
void RenderFrameBase::layoutWithFlattening(bool fixedWidth, bool fixedHeight)
{
FrameView* childFrameView = static_cast<FrameView*>(widget());
RenderView* childRoot = childFrameView ? static_cast<RenderView*>(childFrameView->frame()->contentRenderer()) : 0;
// Do not expand frames which has zero width or height
if (!width() || !height() || !childRoot) {
updateWidgetPosition();
if (childFrameView)
childFrameView->layout();
setNeedsLayout(false);
return;
}
// need to update to calculate min/max correctly
updateWidgetPosition();
if (childRoot->preferredLogicalWidthsDirty())
childRoot->computePreferredLogicalWidths();
// if scrollbars are off, and the width or height are fixed
// we obey them and do not expand. With frame flattening
// no subframe much ever become scrollable.
HTMLFrameElementBase* element = static_cast<HTMLFrameElementBase*>(node());
bool isScrollable = element->scrollingMode() != ScrollbarAlwaysOff;
// consider iframe inset border
int hBorder = borderLeft() + borderRight();
int vBorder = borderTop() + borderBottom();
// make sure minimum preferred width is enforced
if (isScrollable || !fixedWidth) {
setWidth(max(width(), childRoot->minPreferredLogicalWidth() + hBorder));
// update again to pass the new width to the child frame
updateWidgetPosition();
childFrameView->layout();
}
// expand the frame by setting frame height = content height
if (isScrollable || !fixedHeight || childRoot->isFrameSet())
setHeight(max(height(), childFrameView->contentsHeight() + vBorder));
if (isScrollable || !fixedWidth || childRoot->isFrameSet())
setWidth(max(width(), childFrameView->contentsWidth() + hBorder));
updateWidgetPosition();
ASSERT(!childFrameView->layoutPending());
ASSERT(!childRoot->needsLayout());
ASSERT(!childRoot->firstChild() || !childRoot->firstChild()->firstChild() || !childRoot->firstChild()->firstChild()->needsLayout());
setNeedsLayout(false);
}
