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Manual Reference Pages  -  XKBGETNAMEDGEOMETRY (3)


XkbGetNamedGeometry - Loads a keyboard geometry description from this database by name




Status XkbGetNamedGeometry (Display *dpy, XkbDescPtr xkb, Atom name);


- dpy connection to the X server
- xkb keyboard description into which the geometry should be loaded
- name name of the geometry to be loaded


It is also possible to load a keyboard geometry by name. The X server maintains a database of keyboard components (see below).

XkbGetNamedGeometry can return BadName if the name cannot be found.

The X server maintains a database of keyboard components, identified by component type. The database contains all the information necessary to build a complete keyboard description for a particular device, as well as to assemble partial descriptions. Table 1 identifies the component types and the type of information they contain.

Table 1 Server Database Keyboard Components
ComponentComponent Primary ContentsMay also contain
KeymapComplete keyboard description
Normally assembled using a complete component from each of the other types
KeycodesSymbolic name for each key
Minimum and maximum legal keycodes
Aliases for some keys
Symbolic names for indicators
Description of indicators physically present
TypesKey typesReal modifier bindings and symbolic names for some virtual modifiers
CompatibilityRules used to assign actions to keysyms Maps for some indicators
Real modifier bindings and symbolic names for some virtual modifiers
SymbolsSymbol mapping for keyboard keys
Modifier mapping
Symbolic names for groups
Explicit actions and behaviors for some keys
Real modifier bindings and symbolic names for some virtual modifiers
GeometryLayout of the keyboardAliases for some keys; overrides keycodes component aliases
Symbolic names for some indicators
Description of indicators physically present

While a keymap is a database entry for a complete keyboard description, and therefore logically different from the individual component database entries, the rules for processing keymap entries are identical to those for the individual components. In the discussion that follows, the term component is used to refer to either individual components or a keymap.

There may be multiple entries for each of the component types. An entry may be either complete or partial. Partial entries describe only a piece of the corresponding keyboard component and are designed to be combined with other entries of the same type to form a complete entry.

For example, a partial symbols map might describe the differences between a common ASCII keyboard and some national layout. Such a partial map is not useful on its own because it does not include those symbols that are the same on both the ASCII and national layouts (such as function keys). On the other hand, this partial map can be used to configure any ASCII keyboard to use a national layout.

When a keyboard description is built, the components are processed in the order in which they appear in Table 1; later definitions override earlier ones.


BadName A font or color of the specified name does not exist.
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X Version 11 XKBGETNAMEDGEOMETRY (3) libX11 1.6.3

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