Make show_marks configurable

Introduce a config directive "show_marks [yes|no]" to en- or disable drawing marks on window decorations.
To not change the look & feel of existing configurations, the default is "no".

docs/userguide

@@ -1006,6 +1006,24 @@ focus::
 none::
     The window will neither be focused, nor be marked urgent.
 
+=== Drawing marks on window decoration
+
+If activated, marks on windows are drawn in their window decoration. However,
+any mark starting with an underscore in its name (+_+) will not be drawn even if
+this option is activated.
+
+The default for this option is +no+.
+
+*Syntax*:
+-------------------
+show_marks [yes|no]
+-------------------
+
+*Example*:
+--------------
+show_marks yes
+--------------
+
 == Configuring i3bar
 
 The bar at the bottom of your monitor is drawn by a separate process called
@@ -1886,6 +1904,8 @@ The additional +--toggle+ option will remove the mark if the window already has
 this mark, add it if the window has none or replace the current mark if it has
 another mark.
 
+Refer to +show_marks+ if you want marks to be shown in the window decoration.
+
 *Syntax*:
 ------------------------------
 mark [--toggle] identifier

include/config.h

@@ -179,6 +179,10 @@ struct Config {
         FOWA_NONE
     } focus_on_window_activation;
 
+    /** Specifies whether or not marks should be displayed in the window
+     * decoration. Marks starting with a "_" will be ignored either way. */
+    bool show_marks;
+
     /** The default border style for new windows. */
     border_style_t default_border;
 

include/config_directives.h

@@ -52,6 +52,7 @@ CFGFUN(force_xinerama, const char *value);
 CFGFUN(fake_outputs, const char *outputs);
 CFGFUN(force_display_urgency_hint, const long duration_ms);
 CFGFUN(focus_on_window_activation, const char *mode);
+CFGFUN(show_marks, const char *value);
 CFGFUN(hide_edge_borders, const char *borders);
 CFGFUN(assign, const char *workspace);
 CFGFUN(ipc_socket, const char *path);

parser-specs/config.spec

@@ -39,6 +39,7 @@ state INITIAL:
   'fake_outputs', 'fake-outputs'           -> FAKE_OUTPUTS
   'force_display_urgency_hint'             -> FORCE_DISPLAY_URGENCY_HINT
   'focus_on_window_activation'             -> FOCUS_ON_WINDOW_ACTIVATION
+  'show_marks'                             -> SHOW_MARKS
   'workspace'                              -> WORKSPACE
   'ipc_socket', 'ipc-socket'               -> IPC_SOCKET
   'restart_state'                          -> RESTART_STATE
@@ -205,6 +206,11 @@ state FORCE_DISPLAY_URGENCY_HINT:
   duration_ms = number
       -> FORCE_DISPLAY_URGENCY_HINT_MS
 
+# show_marks
+state SHOW_MARKS:
+  value = word
+      -> call cfg_show_marks($value)
+
 state FORCE_DISPLAY_URGENCY_HINT_MS:
   'ms'
       ->

src/config_directives.c

@@ -346,6 +346,10 @@ CFGFUN(focus_on_window_activation, const char *mode) {
     DLOG("Set new focus_on_window_activation mode = %i", config.focus_on_window_activation);
 }
 
+CFGFUN(show_marks, const char *value) {
+    config.show_marks = eval_boolstr(value);
+}
+
 CFGFUN(workspace, const char *workspace, const char *output) {
     DLOG("Assigning workspace \"%s\" to output \"%s\"\n", workspace, output);
     /* Check for earlier assignments of the same workspace so that we

src/x.c

@@ -534,16 +534,16 @@ void x_draw_decoration(Con *con) {
     int indent_px = (indent_level * 5) * indent_mult;
 
     int mark_width = 0;
-    if (con->mark != NULL && (con->mark)[0] != '_') {
+    if (config.show_marks && con->mark != NULL && (con->mark)[0] != '_') {
         char *formatted_mark;
         sasprintf(&formatted_mark, "[%s]", con->mark);
         i3String *mark = i3string_from_utf8(formatted_mark);
         FREE(formatted_mark);
-        mark_width = predict_text_width(mark) + logical_px(2);
+        mark_width = predict_text_width(mark);
 
         draw_text(mark, parent->pixmap, parent->pm_gc,
-                  con->deco_rect.x + con->deco_rect.width - mark_width,
+                  con->deco_rect.x + con->deco_rect.width - mark_width - logical_px(2),
-                  con->deco_rect.y + text_offset_y, mark_width - logical_px(2));
+                  con->deco_rect.y + text_offset_y, mark_width);
 
         I3STRING_FREE(mark);
     }
@@ -551,7 +551,7 @@ void x_draw_decoration(Con *con) {
     draw_text(win->name,
               parent->pixmap, parent->pm_gc,
               con->deco_rect.x + logical_px(2) + indent_px, con->deco_rect.y + text_offset_y,
-              con->deco_rect.width - logical_px(2) - indent_px - mark_width);
+              con->deco_rect.width - logical_px(2) - indent_px - mark_width - logical_px(2));
 
 after_title:
     /* Since we don’t clip the text at all, it might in some cases be painted

testcases/t/201-config-parser.t

@@ -433,7 +433,7 @@ client.focused          #4c7899 #285577 #ffffff #2e9ef4
 EOT
 
 my $expected_all_tokens = <<'EOT';
-ERROR: CONFIG: Expected one of these tokens: <end>, '#', 'set', 'bindsym', 'bindcode', 'bind', 'bar', 'font', 'mode', 'floating_minimum_size', 'floating_maximum_size', 'floating_modifier', 'default_orientation', 'workspace_layout', 'new_window', 'new_float', 'hide_edge_borders', 'for_window', 'assign', 'focus_follows_mouse', 'mouse_warping', 'force_focus_wrapping', 'force_xinerama', 'force-xinerama', 'workspace_auto_back_and_forth', 'fake_outputs', 'fake-outputs', 'force_display_urgency_hint', 'focus_on_window_activation', 'workspace', 'ipc_socket', 'ipc-socket', 'restart_state', 'popup_during_fullscreen', 'exec_always', 'exec', 'client.background', 'client.focused_inactive', 'client.focused', 'client.unfocused', 'client.urgent', 'client.placeholder'
+ERROR: CONFIG: Expected one of these tokens: <end>, '#', 'set', 'bindsym', 'bindcode', 'bind', 'bar', 'font', 'mode', 'floating_minimum_size', 'floating_maximum_size', 'floating_modifier', 'default_orientation', 'workspace_layout', 'new_window', 'new_float', 'hide_edge_borders', 'for_window', 'assign', 'focus_follows_mouse', 'mouse_warping', 'force_focus_wrapping', 'force_xinerama', 'force-xinerama', 'workspace_auto_back_and_forth', 'fake_outputs', 'fake-outputs', 'force_display_urgency_hint', 'focus_on_window_activation', 'show_marks', 'workspace', 'ipc_socket', 'ipc-socket', 'restart_state', 'popup_during_fullscreen', 'exec_always', 'exec', 'client.background', 'client.focused_inactive', 'client.focused', 'client.unfocused', 'client.urgent', 'client.placeholder'
 EOT
 
 my $expected_end = <<'EOT';