XpSetAttributes - Sets or updates an attribute pool in the specified
cc [ flag... ] file... -lXp [ library... ]
void XpSetAttributes ( display, context, type, pool, replacement_rule )
Specifies a pointer to the Display structure; returned from
The print context whose attribute pool is to be modified.
type Specifies the attribute pool.
pool An attribute pool represented as a resource string. Encoded in
Either XPAttrReplace orXPAttrMerge.
XpSetAttributes accepts pool, a COMPOUND_TEXT resource string
representing new name-value pairs for the attribute pool specified by
type. The attribute pool is modified by the new name-value pairs
according to replacement_rule. For XPAttrReplace, the existing
attribute pool is discarded and replaced with pool. For XPAttrMerge,
pool is merged into the existing attribute pool; pre-existing name-
value pairs are replaced, and non-existing name-value pairs are added.
The contents of pool is not affected by this call, and can be freed by
the caller afterwards.
When setting supported attribute names, the X Print Server and
associated driver will validate the new values and ignore those that
are invalid; previous values remain unchanged. When setting unsupported
(that is, unknown) attribute names, no validation is done, and the
name-value pairs will be set, even though they will not be used. When
deleting (that is, failing to reset with XPAttrReplace) a supported
attribute name, the X Print Server explicitly or implicitly resets the
attribute to a default value.
When setting certain supported attributes, the X Print Server may
modify other associated attributes. For example, considering the
XPPrinterAttr attribute document-formats-supported, setting the
XPDocAttr attribute document-format may cause a number of other
attributes to change.
For attribute pools that are read-only (see "get only" in XPAttributes
definition), attempting to use XpSetAttributes generates a BadMatch.
For attribute pools that are writable, lists of the supported
attributes can be found in the XPPrinterAttr pool.
The lifetime of all attribute pools are bounded by the lifetime of the
print context they are contained in. When set, all attribute values
will be retained across all Xp operations, until changed by the user
directly, the X Print Server directly, or changed because of a side
effect when either the user or X Print Server changed another attribute
Refer to a complete description of all print attributes, the precedence
between print attributes, and the side effects of setting certain print
attributes on other print attributes, etc.
To monitor changes to the attribute pools, see XpSelectInput and the
event XPAttributeNotify. Since a print context can be shared among
clients, changes made by one client will be seen by all others, and if
selected for, the event XPAttributeNotify will be sent to all clients
referencing the print context when changes do occur. It is the
responsibility of the clients sharing a print context to coordinate
The values for the typedef XPAttributes in <X11/extensions/Print.h>
#define XPJobAttr 1 /∗ get/set */
#define XPDocAttr 2 /∗ get/set */
#define XPPageAttr 3 /∗ get/set - subset of XPDocAttr */
#define XPPrinterAttr 4 /∗ get only (library) */
#define XPServerAttr 5 /∗ get only (library), no context needed */
The values for the typedef XPAttrReplacement in
#define XPAttrReplace 1
#define XPAttrMerge 2
BadAlloc Insufficient memory.
BadMatch The attribute pool specified by pool cannot be set.
BadValue The value specified for type is not valid.
XPBadContext The specified print context-id is not valid.
XPBadSequence A request to set an attribute pool occurred at a time
when the attribute pool could not be modified (for
example, modifying XPJobAttr immediately after calling