Impliment i3-style marks

This commit adds three commands to sway: `show_marks`, `mark` and
`unmark`. Marks are displayed right-aligned in the window border as i3
does. Marks may be found using criteria.

Fixes #1007

3 files changed, 9 insertions, 0 deletions

diff --git a/include/sway/commands.h b/include/sway/commands.h
index 511bee4d..35a2f92a 100644
--- a/include/sway/commands.h
+++ b/include/sway/commands.h
@@ -126,6 +126,7 @@ sway_cmd cmd_ipc;
 sway_cmd cmd_kill;
 sway_cmd cmd_layout;
 sway_cmd cmd_log_colors;
+sway_cmd cmd_mark;
 sway_cmd cmd_mode;
 sway_cmd cmd_mouse_warping;
 sway_cmd cmd_move;
@@ -140,12 +141,14 @@ sway_cmd cmd_resize;
 sway_cmd cmd_scratchpad;
 sway_cmd cmd_seamless_mouse;
 sway_cmd cmd_set;
+sway_cmd cmd_show_marks;
 sway_cmd cmd_smart_gaps;
 sway_cmd cmd_split;
 sway_cmd cmd_splith;
 sway_cmd cmd_splitt;
 sway_cmd cmd_splitv;
 sway_cmd cmd_sticky;
+sway_cmd cmd_unmark;
 sway_cmd cmd_workspace;
 sway_cmd cmd_ws_auto_back_and_forth;
 sway_cmd cmd_workspace_layout;
diff --git a/include/sway/config.h b/include/sway/config.h
index d77fbd51..2de90434 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -275,6 +275,7 @@ struct sway_config {
         bool reading;
         bool auto_back_and_forth;
         bool seamless_mouse;
+        bool show_marks;
 
         bool edge_gaps;
         bool smart_gaps;
diff --git a/include/sway/container.h b/include/sway/container.h
index 46925589..37192ce3 100644
--- a/include/sway/container.h
+++ b/include/sway/container.h
@@ -165,6 +165,11 @@ struct sway_container {
          * Number of slave groups (e.g. columns) in auto layouts.
          */
         size_t nb_slave_groups;
+
+        /**
+         * Marks applied to the container, list_t of char*.
+         */
+        list_t *marks;
 };
 
 enum visibility_mask {