XkbGetUpdatedMap (3) - Linux Manuals

XkbGetUpdatedMap: Update the client or server map information in an existing

NAME

XkbGetUpdatedMap - Update the client or server map information in an existing keyboard description

SYNOPSIS

Status XkbGetUpdatedMap (Display *display, unsigned int which, XkbDescPtr xkb);
     

ARGUMENTS

- display

connection to X server

- which

mask selecting subcomponents to populate

- xkb

keyboard description to be updated

DESCRIPTION

The which parameter is a bitwise inclusive OR of the masks in Table 1. If the needed components of the xkb structure are not already allocated, XkbGetUpdatedMap allocates them. XkbGetUpdatedMap fetches the requested information for the device specified in the XkbDescRec passed in the xkb parameter.

Table 1 Xkb Mapping Component Masks
and Convenience Functions
Mask	Value	Map	Fields	Convenience
				Functions
XkbKeyTypesMask	(1<<0)	client	types size_types num_types	XkbGetKeyTypes XkbResizeKeyType XkbCopyKeyType XkbCopyKeyTypes
XkbKeySymsMask	(1<<1)	client	syms size_syms num_syms key_sym_map	XkbGetKeySyms XkbResizeKeySyms XkbChangeTypesOfKey
XkbModifierMapMask	(1<<2)	client	modmap	XkbGetKeyModifierMap
XkbExplicitComponentsMask	(1<<3)	server	explicit	XkbGetKeyExplicitComponents
XkbKeyActionsMask	(1<<4)	server	key_acts acts num_acts size_acts	XkbGetKeyActions XkbResizeKeyActions
XkbKeyBehaviorsMask	(1<<5)	server	behaviors	XkbGetKeyBehaviors
XkbVirtualModsMask	(1<<6)	server	vmods	XkbGetVirtualMods
XkbVirtualModMapMask	(1<<7)	server	vmodmap	XkbGetVirtualModMap

XkbGetUpdatedMap is synchronous; it queries the server for the desired information, waits for a reply, and then returns. If successful, XkbGetUpdatedMap returns Success. If unsuccessful, XkbGetUpdatedMap returns one of the following: BadAlloc (unable to allocate a component in the XkbDescRec structure), BadValue (some mask bits in which are undefined), BadImplementation (a compatible version of the Xkb extension is not available in the server or the reply from the server was invalid).

RETURN VALUES

Success

The XkbGetUpdatedMap function returns Success if a reply is received to the server query for the desired information.

STRUCTURES

The complete description of an Xkb keyboard is given by an XkbDescRec. The component structures in the XkbDescRec represent the major Xkb components.

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.

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 2.

Table 2 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)

DIAGNOSTICS

BadAlloc

Unable to allocate storage

BadImplementation

Invalid reply from server

BadValue

An argument is out of range