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- /*
- * AT-SPI - Assistive Technology Service Provider Interface
- * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
- *
- * Copyright 2001 Sun Microsystems Inc.
- *
- * 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; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
- #include <Accessibility_Event.idl>
- #include <Accessibility_Application.idl>
- #include <Accessibility_Desktop.idl>
-
- #ifndef _ACCESSIBILITY_REGISTRY_IDL_
- #define _ACCESSIBILITY_REGISTRY_IDL_
-
- module Accessibility {
-
- typedef sequence<Desktop> DesktopSeq;
-
- interface DeviceEventController;
-
- /**
- * The Registry is a service through which applications providing
- * accessibility services (servers) can rendezvous with consumers of those
- * services (Assistive Technologies). The Registry is the first "port of call" for
- * accessible applications and for assistive technologies wishing to query and
- * interact with those applications.
- *
- * The Registry service provides four basic functions to Assistive Technology (AT) clients:
- * \li it provides a list of the applications who have registered with the AT-SPI
- * framework, thereby announcing their participation in the AT-SPI framework;
- * \li it allows AT clients to register for notification of changes in application
- * state (at-spi Events);
- * \li it dispatches/relays said events from participating applications to
- * the registered listeners;
- * \li it gives access to system device events via the associated DeviceEventController
- * interface.
- *
- * From the point of view of accessible applications (i.e. AT-SPI service producers),
- * the Registry is primarily a registration and event delivery service. Applications
- * normally only call the registerApplication and deregisterApplication Registry methods,
- * and its inherited EventListener::notifyEvent method.
- *
- * @note Although all application events are dispatched via the Registry, other AT client
- * calls are serviced directly by the applications, rather than being relayed via the
- * Registry. The AT client obtains references to these application objects
- * via the enumeration of Desktop instances whose children are Application instances
- * (Registry::getDesktopList) and via examination of the 'source' member of the Event
- * structure.
- *
- * The Registry normally lives in its own process space; communication via Registry and
- * both application services and AT clients takes place via IPC. A process space diagram
- * illustrating the relationship between applications, Registry, and AT is shown below.
- * @image html "http://developer.gnome.org/projects/gap/tech-docs/SPIBlockDiagram.png"
- *
- *
- * @see Desktop, Application, Event, EventListener
- **/
- interface Registry : EventListener {
-
- /**
- * Register a new application with the accessibility broker.
- * @param application: a reference to the requesting Application
- **/
- oneway void registerApplication (in Application application);
-
- /**
- * De-register an application previously registered with the broker.
- * deregisterApplication:
- * @param application: a reference to the Application
- * to be deregistered.
- **/
- void deregisterApplication (in Application application);
-
- /**
- * Register a client's interest in (all) application events of
- * a certain type.
- * @param listener: a reference to the requesting ::EventListener.
- * @param eventName: a string which indicates the type of events about
- * which the client desires notification.
- **/
- void registerGlobalEventListener (in EventListener listener,
- in string eventName);
-
- /**
- * deregisterGlobalEventListenerAll:
- * @param listener: the requesting EventListener
- *
- * Request that a previously registered client stop receiving
- * global notifications for all events for which it was registered.
- *
- **/
- void deregisterGlobalEventListenerAll (in EventListener listener);
-
- /**
- * deregisterGlobalEventListener:
- * @param listener: the requesting EventListener
- * @param eventName: a string indicating the type of events
- *
- * Request that a previously registered client stop receiving
- * global notifications for events of a certain type.
- *
- **/
- void deregisterGlobalEventListener (in EventListener listener,
- in string eventName);
- /**
- * event types: "Window" "Desktop"
- * "Window:Create" "Window:Destroy"
- * "Window:Iconify" "Window:Restore"
- * "Window:Fullscreen" "Window:Resize"
- * "Desktop:Create" "Desktop:Destroy"
- * "Desktop:Focus" "Desktop:Defocus"
- * "Desktop:Reorder"
- * "Focus"
- * "GtkWidget:show"
- * "GObject:notify:<propertyname>"
- *
- * ( not sure we should allow these last 2 forms,
- * since they are toolkit-specific, but they're powerful )
- *
- **/
-
- /**
- * getDesktopCount:
- *
- * Get the current number of desktops.
- * @returns a short integer indicating the current number of
- * Desktops.
- **/
- short getDesktopCount ();
-
- /**
- * getDesktop:
- * @n: the index of the requested Desktop.
- *
- * Get the nth accessible desktop.
- *
- * @returns a reference to the requested Desktop.
- **/
- Desktop getDesktop (in short n);
-
- /**
- * Get a list of accessible desktops.
- *
- * @returns: a sequence containing references to
- * the Desktops.
- **/
- DesktopSeq getDesktopList ();
-
- /**
- * Obtain an object which can be used to request device event notifications.
- *
- * @returns: an object implementing DeviceEventController
- **/
- DeviceEventController getDeviceEventController ();
-
- /** \cond
- * unImplemented:
- *
- * placeholders for future expansion.
- */
- void unImplemented ();
- void unImplemented2 ();
- void unImplemented3 ();
- void unImplemented4 ();
- void unImplemented5 ();
- void unImplemented6 ();
- /** \endcond */
- };
-
- /** Deprecated, DO NOT USE! */
- enum KeyEventType {
- KEY_PRESSED,
- KEY_RELEASED
- };
-
- /** Used to specify the event types of interest to an EventListener, or
- * to identify the type of an event for which notification has been sent.
- * @see EventTypeSeq, DeviceEvent::type
- */
- enum EventType {
- KEY_PRESSED_EVENT, /**< key on a keyboard device was pressed. */
- KEY_RELEASED_EVENT, /**< key on a keyboard device was released. */
- BUTTON_PRESSED_EVENT,/**< button on a non-keyboard human interface device
- * (HID) was pressed */
- BUTTON_RELEASED_EVENT /**< button on a non-keyboard human interface device
- * (HID) was pressed */
- };
-
- /** Used when synthesizing keyboard input via DeviceEventController:generateKeyboardEvent.*/
- enum KeySynthType {
- KEY_PRESS,/** emulate the pressing of a hardware keyboard key. */
- KEY_RELEASE,/** emulate the release of a hardware keyboard key. */
- KEY_PRESSRELEASE,/** a hardware keyboard key is pressed and immediately released. */
- KEY_SYM,/** a symbolic key event is generated, without specifying a hardware key.
- * @note if the keysym is not present in the current keyboard map,
- * the DeviceEventController instance has a limited ability to generate
- * such keysyms on-the-fly. Reliability of generateKeyboardEvent calls
- * using out-of-keymap keysyms will vary from system to system, and on the
- * number of different out-of-keymap being generated in quick succession.
- * In practice this is rarely significant, since the keysyms of interest to
- * AT clients and keyboard emulators are usually part of the current keymap, i.e.
- * present on the system keyboard for the current locale (even if a physical
- * hardware keyboard is not connected.
- */
- KEY_STRING /** a string is converted to its equivalent keyboard events and emitted.
- * If the string consists of complex character or composed characters
- * which are not in the current keymap, string emission is subject to the
- * out-of-keymap limitations described for KeySynthType::KEY_SYM.
- * In practice this limitation primarily effects Chinese and Japanese locales.
- */
- };
-
- enum ModifierType {
- MODIFIER_SHIFT, /** The left or right 'Shift' key */
- MODIFIER_SHIFTLOCK, /** The ShiftLock or CapsLock key */
- MODIFIER_CONTROL,/** 'Control'/'Ctrl' */
- MODIFIER_ALT,/** The Alt key (as opposed to AltGr) */
- MODIFIER_META,/** depending on the platform this may map to 'Window', 'Function', 'Meta',
- * 'Menu', or 'NumLock'.
- * Such 'Meta keys' will map to one of META, META2, META3.
- * On X Windows platforms these META values map to
- * the modifier masks Mod1Mask, Mod2Mask, Mod3Mask, e.g. an event having
- * ModifierType::MODIFIER_META2 means that the 'Mod2Mask' bit is
- * set in the corresponding XEvent.
- */
- MODIFIER_META2,
- MODIFIER_META3,
- MODIFIER_NUMLOCK/** A symbolic meta key name that is mapped by AT-SPI to the
- * appropriate META value, for the convenience of the client.
- */
- };
-
- /** A structure that encapsulates the characteristics of the event notifications
- * that should be sent to an EventListener in response to a call to
- * DeviceEventController::registerKeystrokeListener or
- * DeviceEventController::registerDeviceEventListener. */
- struct EventListenerMode {
- boolean synchronous; /**< If \c True, specifies that
- * DeviceEventController should block while waiting
- * for client to process the requested event notifications;
- * ordinarily should be used only when client needs to perform
- * operations synchronously with event delivery. Note that because
- * of the architecture of device event systems in general,
- * use of this flag may not block delivery of the event to
- * the currently focussed application unless it is used in
- * conjunction with the preemptive flag. */
- boolean preemptive; /**< If \c True, specifies that
- * Listener is allowed to pre-empt the delivery of the event,
- * effectively "consuming" it such that it is not delivered
- * to the currently focussed desktop application.
- * Key events consumed via this API will not be
- * available for use by other applications or services, so this
- * option should be used sparingly. */
- boolean global; /**< If \c True, specifies that
- * Event notifications should be sent regardless of whether the
- * currently focussed application participates in the AT-SPI
- * infrastructure. On systems with the XEvIE X extension, this flag
- * also allows access to events which are already subject to
- * interception via a "system keygrab" (as described in the X Window System
- * documentation for XGrabKey). The 'global' and 'preemptive' flags
- * should only be used together for the purposes of registering
- * "system global key shortcuts" i.e. command keys for use by the
- * assistive technology. */
- };
-
- /**
- * an unsigned short int consisting of zero or more of the following
- * values OR'ed together:
- *
- * \li \c 1<<::KEY_PRESSED_EVENT = 1
- * \li \c 1<<::KEY_RELEASED_EVENT = 2
- * \li \c 1<<::BUTTON_PRESSED_EVENT = 3,
- * \li \c 1<<::BUTTON_RELEASED_EVENT = 4
- **/
- typedef unsigned long ControllerEventMask;
-
- /** A structure which encapsulates information about a device event. */
- struct DeviceEvent {
- EventType type; /**< Identifies the type of the containing DeviceEvent. */
- long id; /**< an identifier which identifies this event in the event stream.
- * On X Window systems this corresponds to the XEvent serial number.
- */
- short hw_code; /**< a numeric code which is hardware and system-dependent, identifying the
- * specific hardware button or key on the device for which the event has
- * occurred. On X Window systems, for global key notifications and for most
- * non-global key notifications as well, this code corresponds to the
- * XKeycode. For switch and button events it indicates the switch
- * or button number.
- * @note
- * For technical reasons, this code may differ from the XKeycode
- * when generated by Java applications for consumption by non-global
- * key listeners. This is subject to change in future versions of the
- * DeviceEventController implementation.
- */
-
- unsigned short modifiers; /**< an unsigned short int consisting of zero or more of the following
- * values OR'ed together:
- * \li \c 1<<::MODIFIER_SHIFT (=1, corresponds to Xlib's ShiftMask)
- * \li \c 1<<::MODIFIER_SHIFTLOCK (=2, corresponds to Xlib's LockMask)
- * \li \c 1<<::MODIFIER_CONTROL (=4, corresponds to Xlib's ControlMask)
- * \li \c 1<<::MODIFIER_ALT (=8, corresponds to Xlib's Mod1Mask)
- * \li \c 1<<::MODIFIER_META (=16, corresponds to Xlib's Mod2Mask)
- * \li \c 1<<::MODIFIER_META2 (=32, corresponds to Xlib's Mod3Mask)
- * \li \c 1<<::MODIFIER_META3 (=64, corresponds to Xlib's Mod4Mask)
- **/
- unsigned long timestamp; /**< an unsigned integer representing the time that the
- * event occurred. On X Window systems this event is
- * a time in milliseconds from some arbitrary starting
- * point; it therefore has a cycle time of approximately
- * 50 days.
- */
- string event_string; /**< A string representation of the event. If is_text is
- * \c True, then this string represents the character or typographic
- * sequence that would be received by a focussed text input field.
- * event_string is in general suitable for exposure to the
- * end-user for purposes of keyboard echo.
- */
- boolean is_text; /**< \c True if the event results in the insertion of characters
- * into an input text buffer, or would do so if delivered to a focussed
- * text input field. ¨Typographical¨ key events have this field set to
- * \c True, whereas ¨control¨ key events generally do not.
- */
- };
-
- /**
- * A structure which defines the identity of a key for which notifications
- * are to be requested. The data in the members of a ::KeyDefinition are used to
- * determine which keyboard events 'match' the notification request filed by a client.
- *
- * @note Ordinarily a KeyDefinition specifies one and only one of the criteria below;
- * the result of using a KeyDefinition with multiple members defined as nonzero is
- * undefined.
- *
- * @param keycode if nonzero, the numeric, system-dependent value corresponding to a
- * physical key on the keyboard. Keycode values have no semantic meaning to the end-user,
- * and may depend on the user's hardware and operating environment. They therefore are
- * rarely useful "as-is" to AT clients, unless the client has used operating system
- * services to identify the hardward keycode associated with a particular key symbol.
- * Notifications for key events requested by keycode are less dependent on modifier state
- * than \c keysym based notifications, but some hardware (notably many laptops) may generate
- * more than one keycode for the same physical key, depending on the state of physical
- * shift/modifier keys.
- * @param keysym if nonzero, the numeric value corresponding to the X Keysym of the key for which
- * notification is requested. Note that the presence of active modifiers will affect
- * whether notification for key events requested via "keysym" specification takes place,
- * since the keysym depends on the modifier state for most keys.
- * @param keystring if non-NULL, the string value of the inserted characters if the corresponding
- * key event has ::KeyEvent:is_text set to \c True, or the string representing the
- * 'name' of the key. On X11 systems, the string 'name' of non-printing keysyms corresponds
- * to the values in "keysymdef.h" as provided by Xlib, with the leading "XK_" stripped off.
- **/
- struct KeyDefinition {
- long keycode;
- long keysym;
- string keystring;
- long unused;
- };
-
- typedef sequence< KeyDefinition > KeySet;
- typedef sequence< EventType > KeyEventTypeSeq;
- typedef sequence< EventType > EventTypeSeq;
-
- /** This interface should be implemented by AT-SPI clients who wish to
- * make use of the DeviceEventController to receive device event notifications.
- * DeviceEvents include keyboard events and mouse button/motion events.
- **/
- interface DeviceEventListener : Bonobo::Unknown {
- /** Notify an interested DeviceEventListener that a DeviceEvent has occurred.
- * @returns \c True if the recipient/consumer wishes to consume the event, i.e.
- * prevent it from being delivered to the desktop, \c False if the event should
- * continue to be delivered as normal.
- */
- boolean notifyEvent (in DeviceEvent event);
- /** \cond */
- void unImplemented__ ();
- void unImplemented_2_ ();
- void unImplemented_3_ ();
- void unImplemented_4_ ();
- void unImplemented_5_ ();
- void unImplemented_6_ ();
- /** \endcond */
- };
-
- /**
- * The interface via which clients request notification of device events, and
- * through which device events may be simulated.
- ***/
- interface DeviceEventController : Bonobo::Unknown {
-
- /**
- * Register to intercept keyboard events, and either pass them on or
- * consume them.
- *
- * @param listener: a DeviceEventListener which will intercept key events.
- * @param keys: a KeySet indicating which keys to intercept, or KEYSET_ALL_KEYS.
- * @param mask: a ControllerEventMask filtering the intercepted key events.
- * @param type: a KeyEventTypeSeq that may created by ORing event types together.
- * @param mode: an EventListenerMode indicating whether the listener should
- * receive the events synchronously, potentially consuming them,
- * or just be notified asynchronously of those events that have
- * been generated.
- * @note Some platforms have limited support for global, preemptive EventListenerMode.
- * Such a registration may fail if another client already has priority for preemptive
- * access to one or more of the members of the KeySet. AT consumers have the option
- * of re-trying the request without the global flag, or without the preemptive flag,
- * or of re-trying with a different KeySet. The best support for pre-emptive
- * global keyboard listeners is provided on platforms whose Xserver implementation
- * provides the XEvIE extension.
- *
- * @returns \c True if the DeviceEventListener was successfully registered
- * for the requested KeySet, ControllerEventMask, event types, and EventListenerMode;
- * otherwise returns \c False.
- **/
- boolean registerKeystrokeListener (in DeviceEventListener listener,
- in KeySet keys,
- in ControllerEventMask mask,
- in KeyEventTypeSeq type,
- in EventListenerMode mode);
-
- /**
- * De-register a previously registered keyboard eventlistener.
- * @param listener: a DeviceEventListener which will intercept key events.
- * @param keys: a KeySet indicating which keys to intercept, or KEYSET_ALL_KEYS.
- * @param mask: a ControllerEventMask filtering the intercepted key events.
- * @param type: an EventType mask that may created by ORing event types together.
- **/
- void deregisterKeystrokeListener (in DeviceEventListener listener,
- in KeySet keys,
- in ControllerEventMask mask,
- in KeyEventTypeSeq type);
-
- /**
- * Register to intercept events, and either pass them on or
- * consume them. To listen to keyboard events use registerKeystrokeListener
- * instead.
- * @param listener: a DeviceEventListener which will intercept events.
- * @param typeseq: an EventTypeSeq indicating which event types to listen for.
- * @returns \c True if successful, \c False if not
- **/
- boolean registerDeviceEventListener (in DeviceEventListener listener,
- in EventTypeSeq typeseq);
-
- /**
- * De-register a previously registered keyboard eventlistener.
- * @param listener: a DeviceEventListener which will intercept events.
- * @param typeseq: an EventTypeSeq indicating which event types to stop
- * listening for.
- **/
- void deregisterDeviceEventListener (in DeviceEventListener listener,
- in EventTypeSeq typeseq);
-
- /**
- * Notify the Registry instance that a device event has taken place, and
- * allow pre-emptive listeners the opportunity to 'consume' the event
- * and thus prevent its further issuance/forwarding. This is the
- * method used by accessibility bridges to forward "toolkit dependent"
- * device events to the Registry from the application's process space.
- *
- * @note AT clients do not normally need to use this method, it is intended for use
- * by toolkit bridges and special-purpose applications.
- *
- * @returns \c True if the event was consumed by a (pre-emptive) listener,
- * \c False if not (in which case the device event will be forwarded
- * as normal to any application which would normally receive it, e.g.
- * the currently active application in the case of mouse or keyboard events).
- **/
- boolean notifyListenersSync (in DeviceEvent event);
-
- /**
- * Notify the Registry instance that a device event has taken place in
- * an asynchronous manner. This is the
- * method used by accessibility bridges to forward "toolkit dependent"
- * device events to the Registry from the application's process space.
- * If the event in question is potentially pre-emptible.
- * ::notifyListenersSync should be used instead.
- *
- * @note AT clients do not normally need to use this method, it is intended for use
- * by toolkit bridges and special-purpose applications.
- **/
- oneway void notifyListenersAsync (in DeviceEvent event);
-
- /**
- * Synthesize a keyboard event.
- * @param keycode: a long integer indicating the keycode of
- * the keypress to be synthesized.
- * @param keystring: an optional UTF-8 string indicating a complex
- * keyboard input event.
- * @param type: a KeySynthType indicating the type of event(s) to be
- * synthesized: a key press, release, press-release pair,
- * or a complex input string (for instance from an
- * internationalized or complex text input method, or
- * a composed character).
- *
- * @note keycode may be truncated before being
- * processed, as keycode length may be platform-dependent
- * and keycode ranges are generally much smaller than
- * CORBA_long.
- * One or the other of keycode or keystring are generally NULL,
- * (but not both), depending on the value of \c type.
- *
- **/
- void generateKeyboardEvent (in long keycode,
- in string keystring,
- in KeySynthType type);
-
- /**
- * Synthesize a mouse event.
- * @param x: a long integer indicating the screen x coord for the mouse event.
- * @param y: a long integer indicating the screen y coord for the mouse event.
- * @param eventName: a string indicating the type of mouse event, e.g. "button1up"
- **/
- void generateMouseEvent (in long x, in long y, in string eventName);
-
- /** \cond
- * unImplemented:
- *
- * placeholders for future expansion.
- */
- void unImplemented ();
- void unImplemented2 ();
- void unImplemented3 ();
- void unImplemented4 ();
- /** \endcond */
- };
- };
-
- #endif
-