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/*
* Copyright (C) 2021 Igalia S.L.
*
* 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.
*/
#pragma once
#if USE(ATSPI)
#include <wtf/CompletionHandler.h>
#include <wtf/FastMalloc.h>
#include <wtf/HashMap.h>
#include <wtf/ListHashSet.h>
#include <wtf/RunLoop.h>
#include <wtf/Vector.h>
#include <wtf/glib/GRefPtr.h>
#include <wtf/glib/GUniquePtr.h>
typedef struct _GDBusConnection GDBusConnection;
typedef struct _GDBusInterfaceInfo GDBusInterfaceInfo;
typedef struct _GDBusInterfaceVTable GDBusInterfaceVTable;
typedef struct _GDBusProxy GDBusProxy;
typedef struct _GVariant GVariant;
namespace WebCore {
class AccessibilityObjectAtspi;
class AccessibilityRootAtspi;
enum class AccessibilityRole : uint8_t;
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(AccessibilityAtspi);
class AccessibilityAtspi {
WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(AccessibilityAtspi);
WTF_MAKE_NONCOPYABLE(AccessibilityAtspi);
friend NeverDestroyed<AccessibilityAtspi>;
public:
WEBCORE_EXPORT static AccessibilityAtspi& singleton();
// Do nothing since this is a singleton.
void ref() const { }
void deref() const { }
void connect(const String&, const String&);
const char* uniqueName() const;
GVariant* nullReference() const;
GVariant* applicationReference() const;
bool hasClients() const { return !m_clients.isEmpty(); }
void registerRoot(AccessibilityRootAtspi&, Vector<std::pair<GDBusInterfaceInfo*, GDBusInterfaceVTable*>>&&, CompletionHandler<void(const String&)>&&);
void unregisterRoot(AccessibilityRootAtspi&);
String registerObject(AccessibilityObjectAtspi&, Vector<std::pair<GDBusInterfaceInfo*, GDBusInterfaceVTable*>>&&);
void unregisterObject(AccessibilityObjectAtspi&);
String registerHyperlink(AccessibilityObjectAtspi&, Vector<std::pair<GDBusInterfaceInfo*, GDBusInterfaceVTable*>>&&);
void parentChanged(AccessibilityObjectAtspi&);
void parentChanged(AccessibilityRootAtspi&);
enum class ChildrenChanged { Added, Removed };
void childrenChanged(AccessibilityObjectAtspi&, AccessibilityObjectAtspi&, ChildrenChanged);
void childrenChanged(AccessibilityRootAtspi&, AccessibilityObjectAtspi&, ChildrenChanged);
void stateChanged(AccessibilityObjectAtspi&, const char*, bool);
void textChanged(AccessibilityObjectAtspi&, const char*, CString&&, unsigned, unsigned);
void textAttributesChanged(AccessibilityObjectAtspi&);
void textCaretMoved(AccessibilityObjectAtspi&, unsigned);
void textSelectionChanged(AccessibilityObjectAtspi&);
void valueChanged(AccessibilityObjectAtspi&, double);
void activeDescendantChanged(AccessibilityObjectAtspi&);
void selectionChanged(AccessibilityObjectAtspi&);
void loadEvent(AccessibilityObjectAtspi&, CString&&);
static const char* localizedRoleName(AccessibilityRole);
#if ENABLE(DEVELOPER_MODE)
using NotificationObserverParameter = std::variant<std::nullptr_t, String, bool, unsigned, Ref<AccessibilityObjectAtspi>>;
using NotificationObserver = Function<void(AccessibilityObjectAtspi&, const char*, NotificationObserverParameter)>;
WEBCORE_EXPORT void addNotificationObserver(void*, NotificationObserver&&);
WEBCORE_EXPORT void removeNotificationObserver(void*);
#endif
private:
AccessibilityAtspi();
struct PendingRootRegistration {
Ref<AccessibilityRootAtspi> root;
Vector<std::pair<GDBusInterfaceInfo*, GDBusInterfaceVTable*>> interfaces;
CompletionHandler<void(const String&)> completionHandler;
};
void didConnect(GRefPtr<GDBusConnection>&&);
void didOwnName();
void initializeRegistry();
void addEventListener(const char* dbusName, const char* eventName);
void removeEventListener(const char* dbusName, const char* eventName);
void addClient(const char* dbusName);
void removeClient(const char* dbusName);
void ensureCache();
void addToCacheIfNeeded(AccessibilityObjectAtspi&);
void cacheUpdateTimerFired();
void cacheClearTimerFired();
bool shouldEmitSignal(const char* interface, const char* name, const char* detail = "");
#if ENABLE(DEVELOPER_MODE)
void notify(AccessibilityObjectAtspi&, const char*, NotificationObserverParameter) const;
void notifyActiveDescendantChanged(AccessibilityObjectAtspi&) const;
void notifyStateChanged(AccessibilityObjectAtspi&, const char*, bool) const;
void notifySelectionChanged(AccessibilityObjectAtspi&) const;
void notifyMenuSelectionChanged(AccessibilityObjectAtspi&) const;
void notifyTextChanged(AccessibilityObjectAtspi&) const;
void notifyTextCaretMoved(AccessibilityObjectAtspi&, unsigned) const;
void notifyValueChanged(AccessibilityObjectAtspi&) const;
void notifyLoadEvent(AccessibilityObjectAtspi&, const CString&) const;
#endif
static GDBusInterfaceVTable s_cacheFunctions;
String m_busName;
bool m_isConnecting { false };
GRefPtr<GDBusConnection> m_connection;
GRefPtr<GDBusProxy> m_registry;
Vector<PendingRootRegistration> m_pendingRootRegistrations;
UncheckedKeyHashMap<CString, Vector<GUniquePtr<char*>>> m_eventListeners;
UncheckedKeyHashMap<AccessibilityRootAtspi*, Vector<unsigned, 3>> m_rootObjects;
UncheckedKeyHashMap<AccessibilityObjectAtspi*, Vector<unsigned, 7>> m_atspiObjects;
UncheckedKeyHashMap<AccessibilityObjectAtspi*, Vector<unsigned, 1>> m_atspiHyperlinks;
UncheckedKeyHashMap<CString, unsigned> m_clients;
unsigned m_cacheID { 0 };
UncheckedKeyHashMap<String, AccessibilityObjectAtspi*> m_cache;
ListHashSet<RefPtr<AccessibilityObjectAtspi>> m_cacheUpdateList;
RunLoop::Timer m_cacheUpdateTimer;
RunLoop::Timer m_cacheClearTimer;
#if ENABLE(DEVELOPER_MODE)
UncheckedKeyHashMap<void*, NotificationObserver> m_notificationObservers;
#endif
};
} // namespace WebCore
#endif // USE(ATSPI)
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