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authorPaul LeoNerd Evans <leonerd@leonerd.org.uk>2008-11-06 19:40:28 +0000
committerPaul LeoNerd Evans <leonerd@leonerd.org.uk>2008-11-06 19:40:28 +0000
commit9aaf16888c9bd1ab63f0336f6becca87525118c6 (patch)
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parent9df6f621b984b9a5dd3ae95df3d3ef94b6280de3 (diff)
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Include demo.c and demo-async.c in the manpages under an EXAMPLE section
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-.TH TERMKEY_GETKEY 3
-.SH NAME
-termkey_getkey, termkey_getkey_force \- retrieve the next key event
-.SH SYNOPSIS
-.nf
-.B #include <termkey.h>
-.sp
-.BI "termkey_result termkey_getkey(termkey_t *" tk ", termkey_key *" key );
-.br
-.BI "termkey_result termkey_getkey_force(termkey_t *" tk ", termkey_key *" key );
-.fi
-.sp
-Link with \fI-ltermkey\fP.
-.SH DESCRIPTION
-\fBtermkey_getkey\fP attempts to retrieve a single keypress event from the buffer, and put it in the structure referred to by \fIkey\fP. If successful it will return \fBTERMKEY_RES_KEY\fP to indicate that the structure now contains a new keypress event. If nothing is in the buffer it will return \fBTERMKEY_RES_NONE\fP. If the buffer contains a partial keypress event which does not yet contain all the bytes required, it will return \fBTERMKEY_RES_AGAIN\fP. If no events are ready and the input stream is now closed, will return \fBTERMKEY_RES_EOF\fP.
-.PP
-\fBtermkey_getkey_force\fP is similar to \fBtermkey_getkey\fP but will not return \fBTERMKEY_RES_AGAIN\fP if a partial match is found. Instead, it will force an interpretation of the bytes, even if this means interpreting the start of an Escape-prefixed multi-byte sequence as a literal "Escape" key followed by normal letters.
-.PP
-Neither of these functions will block or perform any IO operations on the underlying filehandle. To use the instance in an asynchronous program, see \fBtermkey_advisereadable\fP(3). For a blocking call suitable for use in a synchronous program, use \fBtermkey_waitkey\fP(3) instead of \fBtermkey_getkey\fP().
-.PP
-The \fItermkey_key\fP structure is defined as follows:
-.PP
-.in +4n
-.nf
-typedef struct {
- termkey_type type;
- union {
- long codepoint; /* TERMKEY_TYPE_UNICODE */
- int number; /* TERMKEY_TYPE_FUNCTION */
- termkey_keysym sym; /* TERMKEY_TYPE_KEYSYM */
- } code;
- int modifiers;
- char utf8[7];
-} termkey_key;
-.fi
-.in
-.PP
-The \fItype\fP field indicates the type of event, and determines which of the members of the \fIcode\fP union is valid. It will be one of the following constants:
-.TP
-.B TERMKEY_TYPE_UNICODE
-a Unicode codepoint
-.TP
-.B TERMKEY_TYPE_FUNCTION
-a numbered function key
-.TP
-.B TERMKEY_TYPE_KEYSYM
-a symbolic key
-.PP
-The \fImodifiers\fP bitmask is composed of a bitwise-or of the constants \fBTERMKEY_KEYMOD_SHIFT\fP, \fBTERMKEY_KEYMOD_CTRL\fP and \fBTERMKEY_KEYMOD_ALT\fP.
-.PP
-The \fIutf8\fP field is only set on events whose \fItype\fP is \fBTERMKEY_TYPE_UNICODE\fP. It should not be read for other events.
-.PP
-To convert the \fIsym\fP to a symbolic name, see \fBtermkey_get_keyname\fP(3) function. It may instead be easier to convert the entire key event structure to a string, using \fBtermkey_snprint_key\fP(3).
-.SH "RETURN VALUE"
-\fBtermkey_getkey\fP() and \fBtermkey_getkey_force\fP() return one of the following constants:
-.TP
-.B TERMKEY_RES_NONE
-No key event is ready.
-.TP
-.B TERMKEY_RES_KEY
-A key event as been provided.
-.TP
-.B TERMKEY_RES_EOF
-No key events are ready and the terminal has been closed, so no more will arrive.
-.TP
-.B TERMKEY_RES_AGAIN
-No key event is ready yet, but a partial one has been found. This is only returned by \fBtermkey_getkey\fP(). To obtain the partial result even if it never completes, use \fBtermkey_getkey_force\fP().
-.SH "SEE ALSO"
-.BR termkey_new (3),
-.BR termkey_advisereadable (3),
-.BR termkey_waitkey (3),
-.BR termkey_setwaittime (3),
-.BR termkey_get_keyname (3),
-.BR termkey_snprint_key (3)