which specifies the compatibility map components to be freed (see XkbGetCompatMap). which is an inclusive OR of the bits shown in Table 1.
| Table 1 Compatibility Map Component Masks |
| Mask Value Affecting |
| XkbSymInterpMask (1<<0) Symbol interpretations |
| XkbGroupCompatMask (1<<1) Group maps |
| XkbAllCompatMask (0x3) All compatibility map components |
free_map indicates whether the XkbCompatMap structure itself should be freed. If free_map is True, which is ignored, all non-NULL compatibility map components are freed, and the compat field in the XkbDescRec referenced by xkb is set to NULL.
typedef struct _XkbCompatMapRec {
XkbSymInterpretPtr sym_interpret; /* symbol based
key semantics*/
XkbModsRec groups[XkbNumKbdGroups]; /* group => modifier
map */
unsigned short num_si; /* # structures
used in sym_interpret */
unsigned short size_si; /* # structures
allocated in sym_interpret */
} XkbCompatMapRec, *XkbCompatMapPtr;
The complete description of an Xkb keyboard is given by an XkbDescRec. The component structures in the XkbDescRec represent the major Xkb components outlined in Figure 1.1.
typedef struct {
struct _XDisplay * display; /* connection to X server */
unsigned short flags; /* private to Xkb, do not modify */
unsigned short device_spec; /* device of interest */
KeyCode min_key_code; /* minimum keycode for device */
KeyCode max_key_code; /* maximum keycode for device */
XkbControlsPtr ctrls; /* controls */
XkbServerMapPtr server; /* server keymap */
XkbClientMapPtr map; /* client keymap */
XkbIndicatorPtr indicators; /* indicator map */
XkbNamesPtr names; /* names for all components */
XkbCompatMapPtr compat; /* compatibility map */
XkbGeometryPtr geom; /* physical geometry of keyboard */
} XkbDescRec, *XkbDescPtr;
The display field points to an X display structure. The flags field is
private to the library: modifying flags may yield unpredictable results.
The device_spec field specifies the device identifier of the keyboard
input device, or XkbUseCoreKeyboard, which specifies the core keyboard
device. The min_key_code and max_key_code fields specify the least and
greatest keycode that can be returned by the keyboard. The other fields
specify structure components of the keyboard description and are described
in detail in other sections of this document. Table 2 identifies the subsequent
sections of this document that discuss the individual components of the
XkbDescRec.
| Table 2 XkbDescRec Component References |
| XkbDescRec Field For more info |
| ctrls Chapter 10 |
| server Chapter 16 |
| map Chapter 15 |
| indicators Chapter 8 |
| names Chapter 18 |
| compat Chapter 17 |
| geom Chapter 13 |
Each structure component has a corresponding mask bit that is used in function calls to indicate that the structure should be manipulated in some manner, such as allocating it or freeing it. These masks and their relationships to the fields in the XkbDescRec are shown in Table 3.
| Table 3 Mask Bits for XkbDescRec |
| Mask Bit XkbDescRec Field Value |
| _ |
| XkbControlsMask ctrls (1L<<0) |
| XkbServerMapMask server (1L<<1) |
| XkbIClientMapMask map (1L<<2) |
| XkbIndicatorMapMask indicators (1L<<3) |
| XkbNamesMask names (1L<<4) |
| XkbCompatMapMask compat (1L<<5) |
| XkbGeometryMask geom (1L<<6) |
| XkbAllComponentsMask All Fields (0x7f) |