ttDesktop(4) ToolTalk Policy ttDesktop(4)NAMEttDesktop - introduction to desktop messaging policy
DESCRIPTION
The Desktop message policies apply to any tool in a POSIX or X11(7)
environment. In addition to standard messages for these environments,
the Desktop policies define data types and error codes that apply to
all of the ToolTalk message policies.
LIST OF MESSAGES
Do_Command( in string command,
out string results] );
Set_Environment( in string variable,
in string value
[...] );
Get_Environment( in string variable,
out string value
[...] );
Set_Geometry( inout width w
inout height h
inout xOffset x
inout yOffset y
[in messageID commission] );
Set_Iconified( in boolean iconic
[in messageID commission] );
Set_Locale( in string category,
in string locale
[...] );
Get_Locale( in string category,
out string locale
[...] );
Set_Mapped( in boolean mapped
[in messageID commission] );
[file] Modified( in type ID );
[file] Reverted( in type ID );
[file] Get_Modified( in type ID,
out boolean modified );
Pause( [in messageID operation] );
Quit( in boolean silent,
in boolean force
[in messageID operation2Quit] );
Raise( [in messageID commission] );
[file] Save( in type ID );
[file] Revert( in type ID );
[file] Saved( in type ID );
Set_Situation( in string path );
Get_Situation( out string path );
Signal( in string theSignal );
Started( in string vendor,
in string toolName,
in string toolVersion );
Stopped( in string vendor,
in string toolName,
in string toolVersion );
Status( in string status,
in string vendor,
in string toolName,
in string toolVersion
[in messageID commission]);
Get_Status( out string status,
out string vendor,
out string toolName,
out string toolVersion
[in messageID operation2Query]);
Get_Sysinfo( out string sysname,
out string nodename,
out string release,
out string version,
out string machine );
Get_XInfo( out string display,
out string visual,
out integer depth
[in messageID commission] );
DEFINITIONS
boolean
A vtype for logical values. The underlying data type of boolean is
integer; that is, arguments of this vtype should be manipulated with
tt_*_arg_ival[_set]() and tt_*_iarg_add(). Zero means false; non-zero
means true.
messageID
A vtype for uniquely identifying messages. The underlying data type of
messageID is string; that is, arguments of this vtype should be manipu‐
lated with tt_*_arg_val[_set]() and tt_*_arg_add(). The messageID of a
Tt_message is returned by tt_message_id().
type
Any of the vtypes that are the name of the kind of objects in a partic‐
ular system of persistent objects. For example, the vtype for the kind
of objects in filesystems is File. The vtype for ToolTalk objects is
ToolTalk_Object.
vendor
toolName
toolVersion
Names of arguments that appear in several of the messages in the Desk‐
top suite of messages. These strings are not defined rigorously; they
merely should be presentable to the user as descriptions of these three
attributes of the relevant procid.
ERRORS
1102 ITT_DESKTOP_ENOENT
No such file or directory
1113 TT_DESKTOP_EACCES
Permission denied
1122 TT_DESKTOP_EINVAL
Invalid argument
An argument's value was not valid in these circumstances --
e.g., a locale in Set_Locale() that is not valid on the han‐
dler's host. However, TT_DESKTOP_EINVAL should only be used
when no more-specific status (e.g. TT_DESKTOP_ENOMSG, TT_DESK‐
TOP_EPROTO ) applies.
1135 TT_DESKTOP_ENOMSG
No message of desired type
A messageID does not refer to any message currently known by the
handler.
1171 TT_DESKTOP_EPROTO
Protocol error
A message does could not be understood, because
· a required argument was omitted
· an argument had the wrong vtype, or a vtype not allowed in
this message -- e.g., boolean in Get_Geometry()
· an argument had the wrong Tt_mode
· an argument's value was not legal for its vtype -- e.g., neg‐
ative values for width in Set_Geometry()
· an argument's value was not legal for this message -- e.g.,
PATH=/foo as a variable in Get_Environment()
In general, TT_DESKTOP_EPROTO means that one could see that the
request is malformed simply by comparing it with the reference
page for the message.
1147 TT_DESKTOP_ECANCELED
Operation canceled
The operation was canceled because of direct or indirect user
intervention. An example of indirect intervention is termina‐
tion of the handling process caused by the user, or receipt of a
Quit() request. (All messages should be taken as authentically
representing the wishes of the user whose uid is indicated by
tt_message_uid().)
1148 TT_DESKTOP_ENOTSUP
Operation not supported
The requested operation is not supported by this handler. Nor‐
mally, a well-formed request that a handler does not support
should be tt_message_reject()ed, thus causing it to fail with
TT_ERR_NO_MATCH if no supporting handler can be found or
started. But sometimes a handler can safely assume that, if it
rejects a request, no other handler will be able to perform the
operation. Examples: a TT_HANDLER -addressed request such as
Set_Iconified(), or a request referring to state that is managed
by this handler and no other. In these cases, it is better to
explicitly fail the request with TT_DESKTOP_ENOTSUP, in order to
distinguish the case of an incompletely-implemented handler from
the case of the absence of a handler.
TT_ERR_UNIMP should not be used in place of TT_DESKTOP_ENOTSUP,
because TT_ERR_UNIMP means that a particular feature of ToolTalk
itself is not implemented.
1299 TT_DESKTOP_UNMODIFIED
Operation does not apply to unmodified entities
WARNINGS
The vtype namespace for persistent objects currently only contains File
and ToolTalk_Object. Vendors who wish to define a type should either
give it a vendor-specific name or register it through SunSoft's Devel‐
oper Integration Format Registration program. SunSoft can be reached
at 1-800-227-9227.
SEE ALSOttsession(1), intro(2), X11(7), Intro(TTPolicy)ToolTalk 1.3 1 March 1996 ttDesktop(4)
