bindsym/code: add group support

This adds support for specifying a binding for a specific group. Any
binding without a group listed will be available in all groups. The
priority for matching bindings is as follows: input device, group, and
locked state.

For full compatibility with i3, this also adds Mode_switch as an alias
for Group2. Since i3 only supports this for backwards compatibility
with older versions of i3, it is implemented here, but not documented.

1 files changed, 33 insertions, 0 deletions

diff --git a/sway/commands/bind.c b/sway/commands/bind.c
index 767c2fee..5ec89982 100644
--- a/sway/commands/bind.c
+++ b/sway/commands/bind.c
@@ -78,6 +78,10 @@ static bool binding_key_compare(struct sway_binding *binding_a,
                 return false;
         }
 
+        if (binding_a->group != binding_b->group) {
+                return false;
+        }
+
         if (binding_a->modifiers ^ binding_b->modifiers) {
                 return false;
         }
@@ -337,6 +341,7 @@ static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
         }
         binding->input = strdup("*");
         binding->keys = create_list();
+        binding->group = XKB_LAYOUT_INVALID;
         binding->modifiers = 0;
         binding->flags = 0;
         binding->type = bindcode ? BINDING_KEYCODE : BINDING_KEYSYM;
@@ -387,6 +392,34 @@ static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
 
         list_t *split = split_string(argv[0], "+");
         for (int i = 0; i < split->length; ++i) {
+                // Check for group
+                if (strncmp(split->items[i], "Group", strlen("Group")) == 0) {
+                        if (binding->group != XKB_LAYOUT_INVALID) {
+                                free_sway_binding(binding);
+                                list_free_items_and_destroy(split);
+                                return cmd_results_new(CMD_FAILURE,
+                                                "Only one group can be specified");
+                        }
+                        char *end;
+                        int group = strtol(split->items[i] + strlen("Group"), &end, 10);
+                        if (group < 1 || group > 4 || end[0] != '\0') {
+                                free_sway_binding(binding);
+                                list_free_items_and_destroy(split);
+                                return cmd_results_new(CMD_FAILURE, "Invalid group");
+                        }
+                        binding->group = group - 1;
+                        continue;
+                } else if (strcmp(split->items[i], "Mode_switch") == 0) {
+                        // For full i3 compatibility, Mode_switch is an alias for Group2
+                        if (binding->group != XKB_LAYOUT_INVALID) {
+                                free_sway_binding(binding);
+                                list_free_items_and_destroy(split);
+                                return cmd_results_new(CMD_FAILURE,
+                                                "Only one group can be specified");
+                        }
+                        binding->group = 1;
+                }
+
                 // Check for a modifier key
                 uint32_t mod;
                 if ((mod = get_modifier_mask_by_name(split->items[i])) > 0) {