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wt-status: add helpers for printing wt-status lines

Introduce status_printf{,_ln,_more} wrapper functions around
color_vfprintf() which take care of adding "#" to the beginning of
status lines automatically.  The semantics:

 - status_printf() is just like color_fprintf() but it adds a "# "
   at the beginning of each line of output;

 - status_printf_ln() is a convenience function that additionally
   adds "\n" at the end;

 - status_printf_more() is a variant of status_printf() used to
   continue lines that have already started.  It suppresses the "#" at
   the beginning of the first line.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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1 parent 26db0f2 commit becbdae82bb8bb193c2f1e9d8b32a60bdef8b0e4 @jrn jrn committed with gitster Feb 26, 2011
Showing with 93 additions and 0 deletions.
  1. +9 −0 color.c
  2. +3 −0 color.h
  3. +74 −0 wt-status.c
  4. +7 −0 wt-status.h
View
@@ -175,6 +175,15 @@ int git_color_default_config(const char *var, const char *value, void *cb)
return git_default_config(var, value, cb);
}
+void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
+{
+ if (*color)
+ fprintf(fp, "%s", color);
+ fprintf(fp, "%s", sb->buf);
+ if (*color)
+ fprintf(fp, "%s", GIT_COLOR_RESET);
+}
+
static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
va_list args, const char *trail)
{
View
@@ -1,6 +1,8 @@
#ifndef COLOR_H
#define COLOR_H
+struct strbuf;
+
/* 2 + (2 * num_attrs) + 8 + 1 + 8 + 'm' + NUL */
/* "\033[1;2;4;5;7;38;5;2xx;48;5;2xxm\0" */
/*
@@ -64,6 +66,7 @@ __attribute__((format (printf, 3, 4)))
int color_fprintf(FILE *fp, const char *color, const char *fmt, ...);
__attribute__((format (printf, 3, 4)))
int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...);
+void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb);
int color_is_nil(const char *color);
View
@@ -32,6 +32,80 @@ static const char *color(int slot, struct wt_status *s)
return c;
}
+static void status_vprintf(struct wt_status *s, int at_bol, const char *color,
+ const char *fmt, va_list ap, const char *trail)
+{
+ struct strbuf sb = STRBUF_INIT;
+ struct strbuf linebuf = STRBUF_INIT;
+ const char *line, *eol;
+
+ strbuf_vaddf(&sb, fmt, ap);
+ if (!sb.len) {
+ strbuf_addch(&sb, '#');
+ if (!trail)
+ strbuf_addch(&sb, ' ');
+ color_print_strbuf(s->fp, color, &sb);
+ if (trail)
+ fprintf(s->fp, "%s", trail);
+ strbuf_release(&sb);
+ return;
+ }
+ for (line = sb.buf; *line; line = eol + 1) {
+ eol = strchr(line, '\n');
+
+ strbuf_reset(&linebuf);
+ if (at_bol) {
+ strbuf_addch(&linebuf, '#');
+ if (*line != '\n' && *line != '\t')
+ strbuf_addch(&linebuf, ' ');
+ }
+ if (eol)
+ strbuf_add(&linebuf, line, eol - line);
+ else
+ strbuf_addstr(&linebuf, line);
+ color_print_strbuf(s->fp, color, &linebuf);
+ if (eol)
+ fprintf(s->fp, "\n");
+ else
+ break;
+ at_bol = 1;
+ }
+ if (trail)
+ fprintf(s->fp, "%s", trail);
+ strbuf_release(&linebuf);
+ strbuf_release(&sb);
+}
+
+void status_printf_ln(struct wt_status *s, const char *color,
+ const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ status_vprintf(s, 1, color, fmt, ap, "\n");
+ va_end(ap);
+}
+
+void status_printf(struct wt_status *s, const char *color,
+ const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ status_vprintf(s, 1, color, fmt, ap, NULL);
+ va_end(ap);
+}
+
+void status_printf_more(struct wt_status *s, const char *color,
+ const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ status_vprintf(s, 0, color, fmt, ap, NULL);
+ va_end(ap);
+}
+
void wt_status_prepare(struct wt_status *s)
{
unsigned char sha1[20];
View
@@ -68,4 +68,11 @@ void wt_status_collect(struct wt_status *s);
void wt_shortstatus_print(struct wt_status *s, int null_termination, int show_branch);
void wt_porcelain_print(struct wt_status *s, int null_termination);
+void status_printf_ln(struct wt_status *s, const char *color, const char *fmt, ...)
+ ;
+void status_printf(struct wt_status *s, const char *color, const char *fmt, ...)
+ ;
+void status_printf_more(struct wt_status *s, const char *color, const char *fmt, ...)
+ __attribute__((format(printf, 3, 4)));
+
#endif /* STATUS_H */

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