add tmux output format to i3status

i3status.c

@@ -567,6 +567,8 @@ int main(int argc, char *argv[]) {
         output_format = O_I3BAR;
     else if (strcasecmp(output_str, "lemonbar") == 0)
         output_format = O_LEMONBAR;
+    else if (strcasecmp(output_str, "tmux") == 0)
+        output_format = O_TMUX;
     else if (strcasecmp(output_str, "term") == 0)
         output_format = O_TERM;
     else if (strcasecmp(output_str, "none") == 0)

include/i3status.h

@@ -6,6 +6,7 @@ typedef enum {
     O_XMOBAR,
     O_I3BAR,
     O_LEMONBAR,
+    O_TMUX,
     O_TERM,
     O_NONE
 } output_format_t;

man/i3status.man

@@ -5,7 +5,7 @@ v2.14, November 2021
 
 == NAME
 
-i3status - Generates a status line for i3bar, dzen2, xmobar or lemonbar
+i3status - Generates a status line for i3bar, dzen2, xmobar, lemonbar or tmux
 
 == SYNOPSIS
 
@@ -172,6 +172,8 @@ with the xmonad Window Manager.
 lemonbar::
 lemonbar is a lightweight bar based entirely on XCB. It has full UTF-8 support
 and is EWMH compliant.
+tmux::
+tmux is a simple terminal multiplexer that supports multiple panes and a status bar.
 term::
 Use ANSI Escape sequences to produce a terminal-output as close as possible to
 the graphical outputs. This makes debugging your config file a little bit
@@ -722,6 +724,17 @@ is set to +xmobar+. *Note*: +min_width+ is not supported.
 i3status | xmobar -o -t "%StdinReader%" -c "[Run StdinReader]"
 ---------------------------------------------------------------------
 
+== Using i3status with tmux
+
+To use i3status with tmux, just ensure that +output_format+ is set to +tmux+
+and configure the status bar in tmux to execute i3status. *Note*: +min_width+
+is not supported.
+
+*Example tmux configuration for usage of i3status*:
+---------------------------------------------------------------------
+set -g status-right '#(i3status)'
+---------------------------------------------------------------------
+
 == What about CPU frequency?
 
 While talking about specific things, please understand this section as a
@@ -775,7 +788,7 @@ after changing the system volume, for example.
 
 == SEE ALSO
 
-+strftime(3)+, +date(1)+, +glob(3)+, +dzen2(1)+, +xmobar(1)+
++strftime(3)+, +date(1)+, +glob(3)+, +dzen2(1)+, +xmobar(1)+, +tmux(1)+
 
 == AUTHORS
 

src/auto_detect_format.c

@@ -51,6 +51,8 @@ static char *format_for_process(const char *name) {
         return "dzen2";
     else if (strcasecmp(name, "xmobar") == 0)
         return "xmobar";
+    else if (strcasecmp(name, "tmux") == 0)
+        return "tmux";
     else
         return NULL;
 }

src/output.c

@@ -29,6 +29,14 @@ char *color(const char *colorstr) {
         (void)snprintf(colorbuf, sizeof(colorbuf), "<fc=%s>", cfg_getstr(cfg_general, colorstr));
     else if (output_format == O_LEMONBAR)
         (void)snprintf(colorbuf, sizeof(colorbuf), "%%{F%s}", cfg_getstr(cfg_general, colorstr));
+    else if (output_format == O_TMUX) {
+        /* The hex color codes for tmux need to be lowercase, because
+         * #F is a reserved variable that is replaced before colors are
+         * interpreted. This is arguably a bug in tmux. */
+        char *str = cfg_getstr(cfg_general, colorstr);
+        int col = strtol(str + 1, NULL, 16);
+        (void)snprintf(colorbuf, sizeof(colorbuf), "#[fg=#%06x]", col);
+    }
     else if (output_format == O_TERM) {
         /* The escape-sequence for color is <CSI><col>;1m (bright/bold
          * output), where col is a 3-bit rgb-value with b in the
@@ -68,6 +76,13 @@ void print_separator(const char *separator) {
         printf("<fc=%s>%s</fc>", cfg_getstr(cfg_general, "color_separator"), separator);
     else if (output_format == O_LEMONBAR)
         printf("%%{F%s}%s%%{F-}", cfg_getstr(cfg_general, "color_separator"), separator);
+    else if (output_format == O_TMUX) {
+        /* This is the same situation as in `color` above. color hex
+         * codes need to be lowercase in tmux. */
+        char *str = cfg_getstr(cfg_general, "color_separator");
+        int col = strtol(str + 1, NULL, 16);
+        printf("#[fg=#%06x]%s#[default]", col, separator);
+    }
     else if (output_format == O_TERM)
         printf("%s%s%s", color("color_separator"), separator, endcolor());
     else if (output_format == O_NONE)
@@ -154,4 +169,4 @@ char *trim(const char *s) {
     char *f = ltrim(r);
     free(r);
     return f;
-}
+}