2 * Copyright © 2013 Ran Benita
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 #ifndef _XKBCOMMON_X11_H
25 #define _XKBCOMMON_X11_H
28 #include <xkbcommon/xkbcommon.h>
36 * libxkbcommon-x11 API - Additional X11 support for xkbcommon.
40 * @defgroup x11 X11 support
41 * Additional X11 support for xkbcommon.
48 * @page x11-overview Overview
51 * The xkbcommon-x11 module provides a means for creating an xkb_keymap
52 * corresponding to the currently active keymap on the X server. To do
53 * so, it queries the XKB X11 extension using the xcb-xkb library. It
54 * can be used as a replacement for Xlib's keyboard handling.
56 * Following is an example workflow using xkbcommon-x11. A complete
57 * example may be found in the test/interactive-x11.c file in the
58 * xkbcommon source repository. On startup:
60 * 1. Connect to the X server using xcb_connect().
61 * 2. Setup the XKB X11 extension. You can do this either by using the
62 * xcb_xkb_use_extension() request directly, or by using the
63 * xkb_x11_setup_xkb_extension() helper function.
65 * The XKB extension supports using separate keymaps and states for
66 * different keyboard devices. The devices are identified by an integer
67 * device ID and are managed by another X11 extension, XInput (or its
68 * successor, XInput2). The original X11 protocol only had one keyboard
69 * device, called the "core keyboard", which is still supported as a
72 * 3. We will use the core keyboard as an example. To get its device ID,
73 * use either the xcb_xkb_get_device_info() request directly, or the
74 * xkb_x11_get_core_keyboard_device_id() helper function.
75 * 4. Create an initial xkb_keymap for this device, using the
76 * xkb_x11_keymap_new_from_device() function.
77 * 5. Create an initial xkb_state for this device, using the
78 * xkb_x11_state_new_from_device() function.
80 * Next, you need to react to state changes (e.g. a modifier was pressed,
81 * the layout was changed) and to keymap changes (e.g. a tool like xkbcomp,
82 * setxkbmap or xmodmap was used):
84 * 6. Select to listen to at least the following XKB events:
85 * NewKeyboardNotify, MapNotify, StateNotify; using the
86 * xcb_xkb_select_events_aux() request.
87 * 7. When NewKeyboardNotify or MapNotify are received, recreate the
88 * xkb_keymap and xkb_state as described above.
89 * 8. When StateNotify is received, update the xkb_state accordingly
90 * using the xkb_state_update_mask() function.
92 * Finally, when a key event is received, you can use ordinary xkbcommon
93 * functions, like xkb_state_key_get_one_sym() and xkb_state_key_get_utf8(),
94 * as you normally would.
96 * Note: There is no need to call xkb_state_update_key(); the state is
97 * already synchronized.
103 * The minimal compatible major version of the XKB X11 extension which
104 * this library can use.
106 #define XKB_X11_MIN_MAJOR_XKB_VERSION 1
108 * The minimal compatible minor version of the XKB X11 extension which
109 * this library can use (for the minimal major version).
111 #define XKB_X11_MIN_MINOR_XKB_VERSION 0
113 /** Flags for the xkb_x11_setup_xkb_extension() function. */
114 enum xkb_x11_setup_xkb_extension_flags {
115 /** Do not apply any flags. */
116 XKB_X11_SETUP_XKB_EXTENSION_NO_FLAGS = 0
120 * Setup the XKB X11 extension for this X client.
122 * The xkbcommon-x11 library uses various XKB requests. Before doing so,
123 * an X client must notify the server that it will be using the extension.
124 * This function (or an XCB equivalent) must be called before any other
125 * function in this library is used.
127 * Some X servers may not support or disable the XKB extension. If you
128 * want to support such servers, you need to use a different fallback.
130 * You may call this function several times; it is idempotent.
133 * An XCB connection to the X server.
134 * @param major_xkb_version
135 * See @p minor_xkb_version.
136 * @param minor_xkb_version
137 * The XKB extension version to request. To operate correctly, you
138 * must have (major_xkb_version, minor_xkb_version) >=
139 * (XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION),
140 * though this is not enforced.
142 * Optional flags, or 0.
143 * @param[out] major_xkb_version_out
144 * See @p minor_xkb_version_out.
145 * @param[out] minor_xkb_version_out
146 * Backfilled with the compatible XKB extension version numbers picked
147 * by the server. Can be NULL.
148 * @param[out] base_event_out
149 * Backfilled with the XKB base (also known as first) event code, needed
150 * to distinguish XKB events. Can be NULL.
151 * @param[out] base_error_out
152 * Backfilled with the XKB base (also known as first) error code, needed
153 * to distinguish XKB errors. Can be NULL.
155 * @returns 1 on success, or 0 on failure.
158 xkb_x11_setup_xkb_extension(xcb_connection_t *connection,
159 uint16_t major_xkb_version,
160 uint16_t minor_xkb_version,
161 enum xkb_x11_setup_xkb_extension_flags flags,
162 uint16_t *major_xkb_version_out,
163 uint16_t *minor_xkb_version_out,
164 uint8_t *base_event_out,
165 uint8_t *base_error_out);
168 * Get the keyboard device ID of the core X11 keyboard.
170 * @param connection An XCB connection to the X server.
172 * @returns A device ID which may be used with other xkb_x11_* functions,
176 xkb_x11_get_core_keyboard_device_id(xcb_connection_t *connection);
179 * Create a keymap from an X11 keyboard device.
181 * This function queries the X server with various requests, fetches the
182 * details of the active keymap on a keyboard device, and creates an
183 * xkb_keymap from these details.
186 * The context in which to create the keymap.
188 * An XCB connection to the X server.
190 * An XInput 1 device ID (in the range 0-255) with input class KEY.
191 * Passing values outside of this range is an error.
193 * Optional flags for the keymap, or 0.
195 * @returns A keymap retrieved from the X server, or NULL on failure.
197 * @memberof xkb_keymap
200 xkb_x11_keymap_new_from_device(struct xkb_context *context,
201 xcb_connection_t *connection,
203 enum xkb_keymap_compile_flags flags);
206 * Create a new keyboard state object from an X11 keyboard device.
208 * This function is the same as xkb_state_new(), only pre-initialized
209 * with the state of the device at the time this function is called.
212 * The keymap for which to create the state.
214 * An XCB connection to the X server.
216 * An XInput 1 device ID (in the range 0-255) with input class KEY.
217 * Passing values outside of this range is an error.
219 * @returns A new keyboard state object, or NULL on failure.
221 * @memberof xkb_state
224 xkb_x11_state_new_from_device(struct xkb_keymap *keymap,
225 xcb_connection_t *connection,
234 #endif /* _XKBCOMMON_X11_H */