blob: 17d34c57e517ac29a34716390b4a454e4640ab6a [file] [log] [blame]
/*
* Copyright (C) 2006-2017 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 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 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.
*/
#pragma once
#include "ActivityState.h"
#include "FocusDirection.h"
#include "LayoutRect.h"
#include "Timer.h"
#include <wtf/Forward.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class ContainerNode;
class Document;
class Element;
class FocusNavigationScope;
class Frame;
class IntRect;
class KeyboardEvent;
class Node;
class Page;
class TreeScope;
struct FocusCandidate;
class FocusController {
WTF_MAKE_FAST_ALLOCATED;
public:
explicit FocusController(Page&, OptionSet<ActivityState::Flag>);
WEBCORE_EXPORT void setFocusedFrame(Frame*);
Frame* focusedFrame() const { return m_focusedFrame.get(); }
WEBCORE_EXPORT Frame& focusedOrMainFrame() const;
WEBCORE_EXPORT bool setInitialFocus(FocusDirection, KeyboardEvent*);
bool advanceFocus(FocusDirection, KeyboardEvent*, bool initialFocus = false);
WEBCORE_EXPORT bool setFocusedElement(Element*, Frame&, FocusDirection = FocusDirectionNone);
void setActivityState(OptionSet<ActivityState::Flag>);
WEBCORE_EXPORT void setActive(bool);
bool isActive() const { return m_activityState.contains(ActivityState::WindowIsActive); }
WEBCORE_EXPORT void setFocused(bool);
bool isFocused() const { return m_activityState.contains(ActivityState::IsFocused); }
bool contentIsVisible() const { return m_activityState.contains(ActivityState::IsVisible); }
// These methods are used in WebCore/bindings/objc/DOM.mm.
WEBCORE_EXPORT Element* nextFocusableElement(Node&);
WEBCORE_EXPORT Element* previousFocusableElement(Node&);
void setFocusedElementNeedsRepaint();
Seconds timeSinceFocusWasSet() const;
WEBCORE_EXPORT bool relinquishFocusToChrome(FocusDirection);
private:
void setActiveInternal(bool);
void setFocusedInternal(bool);
void setIsVisibleAndActiveInternal(bool);
bool advanceFocusDirectionally(FocusDirection, KeyboardEvent*);
bool advanceFocusInDocumentOrder(FocusDirection, KeyboardEvent*, bool initialFocus);
Element* findFocusableElementAcrossFocusScope(FocusDirection, const FocusNavigationScope& startScope, Node* start, KeyboardEvent*);
Element* findFocusableElementWithinScope(FocusDirection, const FocusNavigationScope&, Node* start, KeyboardEvent*);
Element* nextFocusableElementWithinScope(const FocusNavigationScope&, Node* start, KeyboardEvent*);
Element* previousFocusableElementWithinScope(const FocusNavigationScope&, Node* start, KeyboardEvent*);
Element* findFocusableElementDescendingIntoSubframes(FocusDirection, Element*, KeyboardEvent*);
// Searches through the given tree scope, starting from start node, for the next/previous selectable element that comes after/before start node.
// The order followed is as specified in section 17.11.1 of the HTML4 spec, which is elements with tab indexes
// first (from lowest to highest), and then elements without tab indexes (in document order).
//
// @param start The node from which to start searching. The node after this will be focused. May be null.
//
// @return The focus node that comes after/before start node.
//
// See http://www.w3.org/TR/html4/interact/forms.html#h-17.11.1
Element* findFocusableElementOrScopeOwner(FocusDirection, const FocusNavigationScope&, Node* start, KeyboardEvent*);
Element* findElementWithExactTabIndex(const FocusNavigationScope&, Node* start, int tabIndex, KeyboardEvent*, FocusDirection);
Element* nextFocusableElementOrScopeOwner(const FocusNavigationScope&, Node* start, KeyboardEvent*);
Element* previousFocusableElementOrScopeOwner(const FocusNavigationScope&, Node* start, KeyboardEvent*);
bool advanceFocusDirectionallyInContainer(Node* container, const LayoutRect& startingRect, FocusDirection, KeyboardEvent*);
void findFocusCandidateInContainer(Node& container, const LayoutRect& startingRect, FocusDirection, KeyboardEvent*, FocusCandidate& closest);
void focusRepaintTimerFired();
Page& m_page;
RefPtr<Frame> m_focusedFrame;
bool m_isChangingFocusedFrame;
OptionSet<ActivityState::Flag> m_activityState;
Timer m_focusRepaintTimer;
MonotonicTime m_focusSetTime;
};
} // namespace WebCore