Added command directive 'title_format'.

This directive will be used to customize the window title.

include/commands.h

@@ -276,6 +276,12 @@ void cmd_move_scratchpad(I3_CMD);
  */
 void cmd_scratchpad_show(I3_CMD);
 
+/**
+ * Implementation of 'title_format <format>'
+ *
+ */
+void cmd_title_format(I3_CMD, char *format);
+
 /**
  * Implementation of 'rename workspace <name> to <name>'
  *

parser-specs/commands.spec

@@ -37,6 +37,7 @@ state INITIAL:
   'rename' -> RENAME
   'nop' -> NOP
   'scratchpad' -> SCRATCHPAD
+  'title_format' -> TITLE_FORMAT
   'mode' -> MODE
   'bar' -> BAR
 
@@ -374,6 +375,10 @@ state SCRATCHPAD:
   'show'
       -> call cmd_scratchpad_show()
 
+state TITLE_FORMAT:
+  format = string
+      -> call cmd_title_format($format)
+
 # bar (hidden_state hide|show|toggle)|(mode dock|hide|invisible|toggle) [<bar_id>]
 state BAR:
   bar_type = 'hidden_state'

src/commands.c

@@ -1899,6 +1899,17 @@ void cmd_scratchpad_show(I3_CMD) {
     ysuccess(true);
 }
 
+/*
+ * Implementation of 'title_format <format>'
+ *
+ */
+void cmd_title_format(I3_CMD, char *format) {
+    DLOG("setting title_format to %s\n", format);
+
+    cmd_output->needs_tree_render = true;
+    ysuccess(true);
+}
+
 /*
  * Implementation of 'rename workspace [<name>] to <name>'
  *

testcases/t/187-commands-parser.t

@@ -144,7 +144,7 @@ is(parser_calls("\nworkspace test"),
 ################################################################################
 
 is(parser_calls('unknown_literal'),
-   "ERROR: Expected one of these tokens: <end>, '[', 'move', 'exec', 'exit', 'restart', 'reload', 'shmlog', 'debuglog', 'border', 'layout', 'append_layout', 'workspace', 'focus', 'kill', 'open', 'fullscreen', 'split', 'floating', 'mark', 'unmark', 'resize', 'rename', 'nop', 'scratchpad', 'mode', 'bar'\n" .
+   "ERROR: Expected one of these tokens: <end>, '[', 'move', 'exec', 'exit', 'restart', 'reload', 'shmlog', 'debuglog', 'border', 'layout', 'append_layout', 'workspace', 'focus', 'kill', 'open', 'fullscreen', 'split', 'floating', 'mark', 'unmark', 'resize', 'rename', 'nop', 'scratchpad', 'title_format', 'mode', 'bar'\n" .
    "ERROR: Your command: unknown_literal\n" .
    "ERROR:               ^^^^^^^^^^^^^^^",
    'error for unknown literal ok');