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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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+/*************************************************************************
+ *
+ * File Name (AccessibleAction.idl)
+ *
+ * IAccessible2 IDL Specification
+ *
+ * Copyright (c) 2007, 2013 Linux Foundation
+ * Copyright (c) 2006 IBM Corporation
+ * Copyright (c) 2000, 2006 Sun Microsystems, 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.
+ *
+ * 3. Neither the name of the Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products
+ * derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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.
+ *
+ * This BSD License conforms to the Open Source Initiative "Simplified
+ * BSD License" as published at:
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * IAccessible2 is a trademark of the Linux Foundation. The IAccessible2
+ * mark may be used in accordance with the Linux Foundation Trademark
+ * Policy to indicate compliance with the IAccessible2 specification.
+ *
+ ************************************************************************/
+
+import "objidl.idl";
+import "oaidl.idl";
+import "oleacc.idl";
+
+/** This enum defines values which are predefined actions for use when implementing
+ support for media.
+
+ This enum is used when specifying an action for IAccessibleAction::doAction.
+*/
+
+enum IA2Actions {
+ IA2_ACTION_OPEN = -1, /**< Used to inform the server that the client will
+ signal via IA2_ACTION_COMPLETE when it has consumed
+ the content provided by the object. This action
+ allows the object's server to wait for all clients
+ to signal their readiness for additional content.
+ Any form of content generation that requires
+ synchronization with an AT would require use of this
+ action. One example is the generation of text describing
+ visual content not obvious from a video's sound track.
+ In this scenario the Text to Speech or Braille output
+ may take more time than the related length of silence
+ in the video's sound track. */
+ IA2_ACTION_COMPLETE = -2, /**< Used by the client to inform the server that it has
+ consumed the most recent content provided by this object. */
+ IA2_ACTION_CLOSE = -3 /**< Used to inform the server that the client no longer
+ requires synchronization. */
+};
+
+/** @brief This interface gives access to actions that can be executed
+ for accessible objects.
+
+ Every accessible object that can be manipulated via the native GUI beyond the
+ methods available either in the MSAA IAccessible interface or in the set of
+ IAccessible2 interfaces (other than this IAccessibleAction interface) should
+ support the IAccessibleAction interface in order to provide Assistive Technology
+ access to all the actions that can be performed by the object. Each action can
+ be performed or queried for a name, description or associated key bindings.
+ Actions are needed more for ATs that assist the mobility impaired, such as
+ on-screen keyboards and voice command software. By providing actions directly,
+ the AT can present them to the user without the user having to perform the extra
+ steps to navigate a context menu.
+
+ The first action should be equivalent to the MSAA default action. If there is
+ only one action, %IAccessibleAction should also be implemented.
+*/
+[object, uuid(B70D9F59-3B5A-4dba-AB9E-22012F607DF5)]
+interface IAccessibleAction : IUnknown
+{
+
+ /** @brief Returns the number of accessible actions available in this object.
+
+ If there are more than one, the first one is considered the
+ "default" action of the object.
+ @param [out] nActions
+ The returned value of the number of actions is zero if there are
+ no actions.
+ @retval S_OK
+ @note This method is missing a [propget] prefix in the IDL. The result is the
+ method is named nActions in generated C++ code instead of get_nActions.
+ */
+ HRESULT nActions
+ (
+ [out,retval] long* nActions
+ );
+
+ /** @brief Performs the specified Action on the object.
+ @param [in] actionIndex
+ 0 based index specifying the action to perform. If it lies outside
+ the valid range no action is performed.
+ @retval S_OK
+ @retval S_FALSE if action could not be performed
+ @retval E_INVALIDARG if bad [in] passed
+ @note If implementing support for media, refer to the predefined constants in the ::IA2Actions enum.
+ */
+ HRESULT doAction
+ (
+ [in] long actionIndex
+ );
+
+ /** @brief Returns a description of the specified action of the object.
+ @param [in] actionIndex
+ 0 based index specifying which action's description to return.
+ If it lies outside the valid range an empty string is returned.
+ @param [out] description
+ The returned value is a localized string of the specified action.
+ @retval S_OK
+ @retval S_FALSE if there is nothing to return, [out] value is NULL
+ @retval E_INVALIDARG if bad [in] passed
+ */
+ [propget] HRESULT description
+ (
+ [in] long actionIndex,
+ [out, retval] BSTR *description
+ );
+
+ /** @brief Returns an array of BSTRs describing one or more key bindings, if
+ there are any, associated with the specified action.
+
+ The returned strings are the localized human readable key sequences to be
+ used to activate each action, e.g. "Ctrl+Shift+D". Since these key
+ sequences are to be used when the object has focus, they are like
+ mnemonics (access keys), and not like shortcut (accelerator) keys.
+
+ There is no need to implement this method for single action controls since
+ that would be redundant with the standard MSAA programming practice of
+ getting the mnemonic from get_accKeyboardShortcut.
+
+ An AT such as an On Screen Keyboard might not expose these bindings but
+ provide alternative means of activation.
+
+ Note: the client allocates and passes in an array of pointers. The server
+ allocates the BSTRs and passes back one or more pointers to these BSTRs into
+ the array of pointers allocated by the client. The client is responsible
+ for deallocating the BSTRs.
+
+ @param [in] actionIndex
+ 0 based index specifying which action's key bindings should be returned.
+ @param [in] nMaxBindings
+ This parameter is ignored. Refer to @ref _arrayConsideration
+ "Special Consideration when using Arrays" for more details.
+ @param [out] keyBindings
+ An array of BSTRs, allocated by the server, one for each key binding.
+ The client must free it with CoTaskMemFree.
+ @param [out] nBindings
+ The number of key bindings returned; the size of the returned array.
+ @retval S_OK
+ @retval S_FALSE if there are no key bindings, [out] values are NULL and 0 respectively
+ @retval E_INVALIDARG if bad [in] passed
+ */
+ [propget] HRESULT keyBinding
+ (
+ [in] long actionIndex,
+ [in] long nMaxBindings,
+ [out, size_is(,nMaxBindings), length_is(,*nBindings)] BSTR **keyBindings,
+ [out, retval] long *nBindings
+ );
+
+ /** @brief Returns the non-localized name of specified action.
+ @param [in] actionIndex
+ 0 based index specifying which action's non-localized name should be returned.
+ @param [out] name
+ @retval S_OK
+ @retval S_FALSE if there is nothing to return, [out] value is NULL
+ @retval E_INVALIDARG if bad [in] passed
+ */
+ [propget] HRESULT name
+ (
+ [in] long actionIndex,
+ [out, retval] BSTR *name
+ );
+
+ /** @brief Returns the localized name of specified action.
+ @param [in] actionIndex
+ 0 based index specifying which action's localized name should be returned.
+ @param [out] localizedName
+ @retval S_OK
+ @retval S_FALSE if there is nothing to return, [out] value is NULL
+ @retval E_INVALIDARG if bad [in] passed
+ */
+ [propget] HRESULT localizedName
+ (
+ [in] long actionIndex,
+ [out, retval] BSTR *localizedName
+ );
+
+}