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/*
* Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef FocusController_h
#define FocusController_h
#include "core/CoreExport.h"
#include "platform/geometry/LayoutRect.h"
#include "platform/heap/Handle.h"
#include "public/platform/WebFocusType.h"
#include "wtf/Forward.h"
#include "wtf/Noncopyable.h"
#include "wtf/RefPtr.h"
namespace blink {
struct FocusCandidate;
struct FocusParams;
class Document;
class Element;
class Frame;
class HTMLFrameOwnerElement;
class InputDeviceCapabilities;
class LocalFrame;
class Node;
class Page;
class RemoteFrame;
class CORE_EXPORT FocusController final
: public GarbageCollected<FocusController> {
WTF_MAKE_NONCOPYABLE(FocusController);
public:
static FocusController* create(Page*);
void setFocusedFrame(Frame*, bool notifyEmbedder = true);
void focusDocumentView(Frame*, bool notifyEmbedder = true);
LocalFrame* focusedFrame() const;
Frame* focusedOrMainFrame() const;
// Finds the focused HTMLFrameOwnerElement, if any, in the provided frame.
// An HTMLFrameOwnerElement is considered focused if the frame it owns, or
// one of its descendant frames, is currently focused.
HTMLFrameOwnerElement* focusedFrameOwnerElement(
LocalFrame& currentFrame) const;
// Determines whether the provided Document has focus according to
// http://www.w3.org/TR/html5/editing.html#dom-document-hasfocus
bool isDocumentFocused(const Document&) const;
bool setInitialFocus(WebFocusType);
bool advanceFocus(WebFocusType type,
InputDeviceCapabilities* sourceCapabilities = nullptr) {
return advanceFocus(type, false, sourceCapabilities);
}
bool advanceFocusAcrossFrames(
WebFocusType,
RemoteFrame* from,
LocalFrame* to,
InputDeviceCapabilities* sourceCapabilities = nullptr);
Element* findFocusableElementInShadowHost(const Element& shadowHost);
bool setFocusedElement(Element*, Frame*, const FocusParams&);
// |setFocusedElement| variant with SelectionBehaviorOnFocus::None,
// |WebFocusTypeNone, and null InputDeviceCapabilities.
bool setFocusedElement(Element*, Frame*);
void setActive(bool);
bool isActive() const { return m_isActive; }
void setFocused(bool);
bool isFocused() const { return m_isFocused; }
DECLARE_TRACE();
private:
explicit FocusController(Page*);
Element* findFocusableElement(WebFocusType, Element&);
bool advanceFocus(WebFocusType,
bool initialFocus,
InputDeviceCapabilities* sourceCapabilities = nullptr);
bool advanceFocusDirectionally(WebFocusType);
bool advanceFocusInDocumentOrder(LocalFrame*,
Element* start,
WebFocusType,
bool initialFocus,
InputDeviceCapabilities* sourceCapabilities);
bool advanceFocusDirectionallyInContainer(Node* container,
const LayoutRect& startingRect,
WebFocusType);
void findFocusCandidateInContainer(Node& container,
const LayoutRect& startingRect,
WebFocusType,
FocusCandidate& closest);
Member<Page> m_page;
Member<Frame> m_focusedFrame;
bool m_isActive;
bool m_isFocused;
bool m_isChangingFocusedFrame;
};
} // namespace blink
#endif // FocusController_h
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