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/*
* Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef HTMLFrameOwnerElement_h
#define HTMLFrameOwnerElement_h
#include "core/CoreExport.h"
#include "core/dom/Document.h"
#include "core/frame/FrameOwner.h"
#include "core/html/HTMLElement.h"
#include "platform/heap/Handle.h"
#include "platform/scroll/ScrollTypes.h"
#include "platform/weborigin/SecurityPolicy.h"
#include "wtf/HashCountedSet.h"
namespace blink {
class ExceptionState;
class Frame;
class LayoutPart;
class Widget;
class CORE_EXPORT HTMLFrameOwnerElement : public HTMLElement,
public FrameOwner {
USING_GARBAGE_COLLECTED_MIXIN(HTMLFrameOwnerElement);
public:
~HTMLFrameOwnerElement() override;
DOMWindow* contentWindow() const;
Document* contentDocument() const;
virtual void disconnectContentFrame();
// Most subclasses use LayoutPart (either LayoutEmbeddedObject or
// LayoutIFrame) except for HTMLObjectElement and HTMLEmbedElement which may
// return any LayoutObject when using fallback content.
LayoutPart* layoutPart() const;
Document* getSVGDocument(ExceptionState&) const;
virtual bool loadedNonEmptyDocument() const { return false; }
virtual void didLoadNonEmptyDocument() {}
void setWidget(Widget*);
Widget* releaseWidget();
Widget* ownedWidget() const;
class UpdateSuspendScope {
STACK_ALLOCATED();
public:
UpdateSuspendScope();
~UpdateSuspendScope();
private:
void performDeferredWidgetTreeOperations();
};
// FrameOwner overrides:
Frame* contentFrame() const final { return m_contentFrame; }
void setContentFrame(Frame&) final;
void clearContentFrame() final;
void dispatchLoad() final;
SandboxFlags getSandboxFlags() const final { return m_sandboxFlags; }
bool canRenderFallbackContent() const override { return false; }
void renderFallbackContent() override {}
AtomicString browsingContextContainerName() const override {
return getAttribute(HTMLNames::nameAttr);
}
ScrollbarMode scrollingMode() const override { return ScrollbarAuto; }
int marginWidth() const override { return -1; }
int marginHeight() const override { return -1; }
bool allowFullscreen() const override { return false; }
bool allowPaymentRequest() const override { return false; }
AtomicString csp() const override { return nullAtom; }
const WebVector<WebPermissionType>& delegatedPermissions() const override;
DECLARE_VIRTUAL_TRACE();
protected:
HTMLFrameOwnerElement(const QualifiedName& tagName, Document&);
void setSandboxFlags(SandboxFlags);
bool loadOrRedirectSubframe(const KURL&,
const AtomicString& frameName,
bool replaceCurrentItem);
bool isKeyboardFocusable() const override;
void disposeWidgetSoon(Widget*);
private:
// Intentionally private to prevent redundant checks when the type is
// already HTMLFrameOwnerElement.
bool isLocal() const final { return true; }
bool isRemote() const final { return false; }
bool isFrameOwnerElement() const final { return true; }
virtual ReferrerPolicy referrerPolicyAttribute() {
return ReferrerPolicyDefault;
}
Member<Frame> m_contentFrame;
Member<Widget> m_widget;
SandboxFlags m_sandboxFlags;
};
DEFINE_ELEMENT_TYPE_CASTS(HTMLFrameOwnerElement, isFrameOwnerElement());
class SubframeLoadingDisabler {
STACK_ALLOCATED();
public:
explicit SubframeLoadingDisabler(Node& root)
: SubframeLoadingDisabler(&root) {}
explicit SubframeLoadingDisabler(Node* root) : m_root(root) {
if (m_root)
disabledSubtreeRoots().add(m_root);
}
~SubframeLoadingDisabler() {
if (m_root)
disabledSubtreeRoots().remove(m_root);
}
static bool canLoadFrame(HTMLFrameOwnerElement& owner) {
for (Node* node = &owner; node; node = node->parentOrShadowHostNode()) {
if (disabledSubtreeRoots().contains(node))
return false;
}
return true;
}
private:
// The use of UntracedMember<Node> is safe as all SubtreeRootSet
// references are on the stack and reachable in case a conservative
// GC hits.
// TODO(sof): go back to HeapHashSet<> once crbug.com/684551 has been
// resolved.
using SubtreeRootSet = HashCountedSet<UntracedMember<Node>>;
CORE_EXPORT static SubtreeRootSet& disabledSubtreeRoots();
Member<Node> m_root;
};
DEFINE_TYPE_CASTS(HTMLFrameOwnerElement,
FrameOwner,
owner,
owner->isLocal(),
owner.isLocal());
} // namespace blink
#endif // HTMLFrameOwnerElement_h
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