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/*
* Copyright (C) 2019 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
#if ENABLE(ACCESSIBILITY_ISOLATED_TREE)
#include "AXIsolatedTreeNode.h"
#include <wtf/HashMap.h>
#include <wtf/RefPtr.h>
#include <wtf/ThreadSafeRefCounted.h>
namespace WebCore {
class Page;
class AXIsolatedTree : public ThreadSafeRefCounted<AXIsolatedTree>, public CanMakeWeakPtr<AXIsolatedTree> {
WTF_MAKE_NONCOPYABLE(AXIsolatedTree); WTF_MAKE_FAST_ALLOCATED;
public:
static Ref<AXIsolatedTree> create();
virtual ~AXIsolatedTree();
static Ref<AXIsolatedTree> createTreeForPageID(uint64_t pageID);
WEBCORE_EXPORT static Ref<AXIsolatedTree> initializePageTreeForID(uint64_t pageID, AXObjectCache&);
WEBCORE_EXPORT static RefPtr<AXIsolatedTree> treeForPageID(uint64_t pageID);
WEBCORE_EXPORT static RefPtr<AXIsolatedTree> treeForID(AXIsolatedTreeID);
WEBCORE_EXPORT RefPtr<AXIsolatedTreeNode> rootNode();
WEBCORE_EXPORT RefPtr<AXIsolatedTreeNode> focusedUIElement();
RefPtr<AXIsolatedTreeNode> nodeForID(AXID) const;
static RefPtr<AXIsolatedTreeNode> nodeInTreeForID(AXIsolatedTreeID, AXID);
// Call on main thread
void appendNodeChanges(Vector<Ref<AXIsolatedTreeNode>>&);
void removeNode(AXID);
void setRootNodeID(AXID);
void setFocusedNodeID(AXID);
// Call on AX thread
WEBCORE_EXPORT void applyPendingChanges();
WEBCORE_EXPORT void setInitialRequestInProgress(bool);
AXIsolatedTreeID treeIdentifier() const { return m_treeID; }
private:
AXIsolatedTree();
static HashMap<AXIsolatedTreeID, Ref<AXIsolatedTree>>& treeIDCache();
static HashMap<uint64_t, Ref<AXIsolatedTree>>& treePageCache();
// Only access on AX thread requesting data.
HashMap<AXID, Ref<AXIsolatedTreeNode>> m_readerThreadNodeMap;
// Written to by main thread under lock, accessed and applied by AX thread.
Vector<Ref<AXIsolatedTreeNode>> m_pendingAppends;
Vector<AXID> m_pendingRemovals;
AXID m_pendingFocusedNodeID;
AXID m_pendingRootNodeID;
Lock m_changeLogLock;
AXIsolatedTreeID m_treeID;
AXID m_rootNodeID { InvalidAXID };
AXID m_focusedNodeID { InvalidAXID };
bool m_initialRequestInProgress;
};
} // namespace WebCore
#endif