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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
119 lines
4.5 KiB
C++
119 lines
4.5 KiB
C++
/*
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* Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_CORE_PAGE_FOCUSCONTROLLER_H_
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#define SKY_ENGINE_CORE_PAGE_FOCUSCONTROLLER_H_
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#include "sky/engine/core/page/FocusType.h"
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#include "sky/engine/platform/geometry/LayoutRect.h"
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#include "sky/engine/platform/heap/Handle.h"
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#include "sky/engine/wtf/Forward.h"
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#include "sky/engine/wtf/Noncopyable.h"
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#include "sky/engine/wtf/RefPtr.h"
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namespace blink {
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struct FocusCandidate;
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class Document;
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class Element;
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class LocalFrame;
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class IntRect;
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class KeyboardEvent;
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class Node;
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class Page;
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class TreeScope;
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class FocusNavigationScope {
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STACK_ALLOCATED();
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public:
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Node* rootNode() const;
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Element* owner() const;
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static FocusNavigationScope focusNavigationScopeOf(Node*);
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static FocusNavigationScope ownedByNonFocusableFocusScopeOwner(Node*);
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static FocusNavigationScope ownedByShadowHost(Node*);
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private:
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explicit FocusNavigationScope(TreeScope*);
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RawPtr<TreeScope> m_rootTreeScope;
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};
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class FocusController {
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WTF_MAKE_NONCOPYABLE(FocusController); WTF_MAKE_FAST_ALLOCATED;
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public:
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static PassOwnPtr<FocusController> create(Page*);
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void setFocusedFrame(PassRefPtr<LocalFrame>);
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void focusDocumentView(PassRefPtr<LocalFrame>);
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LocalFrame* focusedFrame() const { return m_focusedFrame.get(); }
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LocalFrame* focusedOrMainFrame() const;
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bool setInitialFocus(FocusType);
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bool advanceFocus(FocusType type) { return advanceFocus(type, false); }
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bool setFocusedElement(Element*, PassRefPtr<LocalFrame>, FocusType = FocusTypeNone);
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void setActive(bool);
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bool isActive() const { return m_isActive; }
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void setFocused(bool);
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bool isFocused() const { return m_isFocused; }
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private:
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explicit FocusController(Page*);
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bool advanceFocus(FocusType, bool initialFocus);
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bool advanceFocusInDocumentOrder(FocusType, bool initialFocus);
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Node* findFocusableNodeAcrossFocusScope(FocusType, FocusNavigationScope startScope, Node* start);
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Node* findFocusableNodeRecursively(FocusType, FocusNavigationScope, Node* start);
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Node* findFocusableNodeDecendingDownIntoFrameDocument(FocusType, Node*);
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// Searches through the given tree scope, starting from start node, for the next/previous selectable element that comes after/before start node.
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// The order followed is as specified in section 17.11.1 of the HTML4 spec, which is elements with tab indexes
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// first (from lowest to highest), and then elements without tab indexes (in document order).
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//
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// @param start The node from which to start searching. The node after this will be focused. May be null.
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//
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// @return The focus node that comes after/before start node.
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//
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// See http://www.w3.org/TR/html4/interact/forms.html#h-17.11.1
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inline Node* findFocusableNode(FocusType, FocusNavigationScope, Node* start);
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Node* nextFocusableNode(FocusNavigationScope, Node* start);
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Node* previousFocusableNode(FocusNavigationScope, Node* start);
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Node* findNodeWithExactTabIndex(Node* start, int tabIndex, FocusType);
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Page* m_page;
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RefPtr<LocalFrame> m_focusedFrame;
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bool m_isActive;
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bool m_isFocused;
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bool m_isChangingFocusedFrame;
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_PAGE_FOCUSCONTROLLER_H_
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