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Code

Add center3(): centre three strings

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This commit is contained in:
John Zaitseff 2011-07-16 15:47:05 +10:00
parent 885b49f19d
commit a75ec7479d
2 changed files with 72 additions and 0 deletions
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67
src/intf.c
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@ -404,6 +404,73 @@ int center2 (WINDOW *win, int y, int attr_initial, int attr_string,
}
/*-----------------------------------------------------------------------
Function: center3 - Centre three strings on the current line
Arguments: win - Window to use
y - Line on which to centre the string
attr_initial - Window attribute to use for initial string
attr_final - Window attribute to use for final string
attr_string - Window attribute to use for main string
initial - Fixed initial string
final - Fixed final string
format - printf()-like format string
... - printf()-like arguments
Returns: int - Return code from wprintw()
This function prints three strings in the centre of line y in the
window win. The initial string is printed using the window attributes
in attr_initial, the main string uses attr_string and the final string
uses attr_final. No spaces appear between the three strings. Please
note that wrefresh() is NOT called. Also note ordering of parameters!
*/
int center3 (WINDOW *win, int y, int attr_initial, int attr_final,
int attr_string, const char *initial, const char *final,
const char *format, ...)
{
va_list args;
int oldattr;
int len1, len2, len3;
int ret, x;
char *buf;
buf = malloc(BUFSIZE);
if (buf == NULL) {
err_exit("out of memory");
}
oldattr = getbkgd(win) & ~A_CHARTEXT;
wbkgdset(win, A_NORMAL | (oldattr & A_COLOR));
len1 = strlen(initial);
len3 = strlen(final);
va_start(args, format);
len2 = vsnprintf(buf, BUFSIZE, format, args);
va_end(args);
if (len2 < 0) {
free(buf);
return ERR;
}
x = (getmaxx(win) - (len1 + len2 + len3)) / 2;
wattrset(win, attr_initial);
mvwprintw(win, y, MAX(x, 2), "%s", initial);
wattrset(win, attr_string);
ret = wprintw(win, "%1.*s", getmaxx(win) - len1 - len3 - 4, buf);
wattrset(win, attr_final);
wprintw(win, "%s", final);
wattrset(win, oldattr);
wbkgdset(win, oldattr);
free(buf);
return ret;
}
/*-----------------------------------------------------------------------
Function: attrpr - Print a string with special attributes
Arguments: win - Window to use

5
src/intf.h
View File

@ -176,6 +176,11 @@ extern int center2 (WINDOW *win, int y, int attr_initial, int attr_string,
const char *initial, const char *format, ...)
__attribute__((format (printf, 6, 7)));
extern int center3 (WINDOW *win, int y, int attr_initial, int attr_final,
int attr_string, const char *initial, const char *final,
const char *format, ...)
__attribute__((format (printf, 8, 9)));
extern int attrpr (WINDOW *win, int attr, const char *format, ...)
__attribute__((format (printf, 3, 4)));