1XkbGetDeviceInfo(3) XKB FUNCTIONS XkbGetDeviceInfo(3)
2
6 XkbGetDeviceInfo - Determine whether the X server allows Xkb access to
7 particular capabilities of input devices other than the core X key‐
8 board, or to determine the status of indicator maps, indicator names or
9 button actions on a non-KeyClass extension device
10
12 XkbDeviceInfoPtr XkbGetDeviceInfo (Display *dpy, unsigned int which,
13 unsigned int device_spec, unsigned int ind_class, unsigned int
14 ind_id);
15
17 - dpy connection to X server
18 - which
20 mask indicating information to return
21 - device_spec
23 device ID, or XkbUseCoreKbd
24 - ind_class
26 feedback class for indicator requests
27 - ind_id
29 feedback ID for indicator requests
30
32 To determine whether the X server allows Xkb access to particular capa‐
33 bilities of input devices other than the core X keyboard, or to deter‐
34 mine the status of indicator maps, indicator names or button actions on
35 a non-KeyClass extension device, use XkbGetDeviceInfo.
36 XkbGetDeviceInfo returns information about the input device specified
38 by device_spec. Unlike the device_spec parameter of most Xkb func‐
39 tions, device_spec does not need to be a keyboard device. It must, how‐
40 ever, indicate either the core keyboard or a valid X Input Extension
41 device.
42 The which parameter is a mask specifying optional information to be re‐
44 turned. It is an inclusive OR of one or more of the values from Table 1
45 and causes the returned XkbDeviceInfoRec to contain values for the cor‐
46 responding fields specified in the table.
47 Table 1 XkbDeviceInfoRec Mask Bits
49 ____________________________________________________________________________________
50 Name XkbDeviceInfoRec Value Capability If Set
51 Fields Effected
52 ____________________________________________________________________________________
53 XkbXI_KeyboardsMask (1L <<0) Clients can use all
54 Xkb requests and events
55 with KeyClass devices
56 supported by the input
57 device extension.
58 XkbXI_ButtonActionsMask num_btns (1L <<1) Clients can assign key
60 btn_acts actions to buttons
61 non-KeyClass input
62 extension devices.
63 XkbXI_IndicatorNamesMask leds->names (1L <<2) Clients can assign
65 names to indicators on
66 non-KeyClass input
67 extension devices.
68 XkbXI_IndicatorMapsMask leds->maps (1L <<3) Clients can assign
70 indicator maps to
71 indicators on
72 non-KeyClass input
73 extension devices.
74 XkbXI_IndicatorStateMask leds->state (1L <<4) Clients can request
76 the status of indicators
77 on non-KeyClass input
78 extension devices.
79 XkbXI_IndicatorsMask sz_leds (0x1c) XkbXI_IndicatorNamesMask |
81 num_leds XkbXI_IndicatorMapsMask |
82 leds->* XkbXI_IndicatorStateMask
83 XkbXI_UnsupportedFeaturesMask unsupported (1L <<15)
85 XkbXI_AllDeviceFeaturesMask Those selected (0x1e) XkbXI_IndicatorsMask |
87 by Value Column XkbSI_ButtonActionsMask
88 masks
89 XkbXI_AllFeaturesMask Those selected (0x1f) XkbSI_AllDeviceFeaturesMask |
91 by Value Column XkbSI_KeyboardsMask
92 masks
93 XkbXI_AllDetailsMask Those selected (0x801f) XkbXI_AllFeaturesMask |
95 by Value column XkbXI_UnsupportedFeaturesMask
96 masks
97 The XkbDeviceInfoRec returned by XkbGetDeviceInfo always has values for
99 name (may be a null string, ""), type, supported, unsupported,
100 has_own_state, dflt_kbd_fd, and dflt_kbd_fb. Other fields are filled
101 in as specified by which.
102 Upon return, the supported field will be set to the inclusive OR of
104 zero or more bits from Table 1; each bit set indicates an optional Xkb
105 extension device feature supported by the server implementation, and a
106 client may modify the associated behavior.
107 If the XkbButtonActionsMask bit is set in which, the XkbDeviceInfoRec
109 returned will have the button actions (btn_acts field) filled in for
110 all buttons.
111 If which includes one of the bits in XkbXI_IndicatorsMask, the feedback
113 class of the indicators must be specified in ind_class, and the feed‐
114 back ID of the indicators must be specified in ind_id. If the request
115 does not include any of the bits in XkbXI_IndicatorsMask, the ind_class
116 and ind_id parameters are ignored. The class and ID can be obtained via
117 the input device extension XListInputDevices request.
118 If any of the XkbXI_IndicatorsMask bits are set in which, the XkbDevi‐
120 ceInfoRec returned will have filled in the portions of the leds struc‐
121 ture corresponding to the indicator feedback identified by ind_class
122 and ind_id. The leds vector of the XkbDeviceInfoRec is allocated if
123 necessary and sz_leds and num_leds filled in. The led_class, led_id and
124 phys_indicators fields of the leds entry corresponding to ind_class and
125 ind_id are always filled in. If which contains XkbXI_IndicatorNames‐
126 Mask, the names_present and names fields of the leds structure corre‐
127 sponding to ind_class and ind_id are returned. If which contains Xk‐
128 bXI_IndicatorStateMask, the corresponding state field is updated. If
129 which contains XkbXI_IndicatorMapsMask, the maps_present and maps
130 fields are updated.
131 Xkb provides convenience functions to request subsets of the informa‐
133 tion available via XkbGetDeviceInfo. These convenience functions mir‐
134 ror some of the mask bits. The functions all take an XkbDeviceInfoPtr
135 as an input argument and operate on the X Input Extension device speci‐
136 fied by the device_spec field of the structure. Only the parts of the
137 structure indicated in the function description are updated. The XkbDe‐
138 viceInfoRec structure used in the function call can be obtained by
139 calling XkbGetDeviceInfo or can be allocated by calling XkbAllocDevice‐
140 Info.
141
143 Information about X Input Extension devices is transferred between a
144 client program and the Xkb extension in an XkbDeviceInfoRec structure:
145 typedef struct {
147 char * name; /* name for device */
148 Atom type; /* name for class of devices */
149 unsigned short device_spec; /* device of interest */
150 Bool has_own_state; /* True=>this device has its own state */
151 unsigned short supported; /* bits indicating supported capabilities */
152 unsigned short unsupported; /* bits indicating unsupported capabilities */
153 unsigned short num_btns; /* number of entries in btn_acts */
154 XkbAction * btn_acts; /* button actions */
155 unsigned short sz_leds; /* total number of entries in LEDs vector */
156 unsigned short num_leds; /* number of valid entries in LEDs vector */
157 unsigned short dflt_kbd_fb; /* input extension ID of default (core kbd) indicator */
158 unsigned short dflt_led_fb; /* input extension ID of default indicator feedback */
159 XkbDeviceLedInfoPtr leds; /* LED descriptions */
160 } XkbDeviceInfoRec, *XkbDeviceInfoPtr;
161
164 XkbAllocDeviceInfo(3), XListInputDevices(3)
165X Version 11 libX11 1.7.2 XkbGetDeviceInfo(3)