bar_cmd_modifier: add support for none

sway-bar(5) documents `modifier none`, which comes from i3. This
implements the functionality for `modifier none` since it was not
previously implemented. The bar modifier toggles visibility of the bar
when the bar mode is set to hide. When the bar modifier is set to
`none`, the ability to toggle visibility of the bar will be disabled.

1 files changed, 18 insertions, 11 deletions

diff --git a/sway/commands/bar/modifier.c b/sway/commands/bar/modifier.c
index c95250d1..d25d01d4 100644
--- a/sway/commands/bar/modifier.c
+++ b/sway/commands/bar/modifier.c
@@ -15,19 +15,26 @@ struct cmd_results *bar_cmd_modifier(int argc, char **argv) {
         }
 
         uint32_t mod = 0;
-        list_t *split = split_string(argv[0], "+");
-        for (int i = 0; i < split->length; ++i) {
-                uint32_t tmp_mod;
-                if ((tmp_mod = get_modifier_mask_by_name(split->items[i])) > 0) {
-                        mod |= tmp_mod;
-                } else {
-                        error = cmd_results_new(CMD_INVALID,
-                                "Unknown modifier '%s'", (char *)split->items[i]);
-                        list_free_items_and_destroy(split);
-                        return error;
+        if (strcmp(argv[0], "none") != 0) {
+                list_t *split = split_string(argv[0], "+");
+                for (int i = 0; i < split->length; ++i) {
+                        uint32_t tmp_mod;
+                        if ((tmp_mod = get_modifier_mask_by_name(split->items[i])) > 0) {
+                                mod |= tmp_mod;
+                        } else if (strcmp(split->items[i], "none") == 0) {
+                                error = cmd_results_new(CMD_INVALID,
+                                                "none cannot be used along with other modifiers");
+                                list_free_items_and_destroy(split);
+                                return error;
+                        } else {
+                                error = cmd_results_new(CMD_INVALID,
+                                        "Unknown modifier '%s'", (char *)split->items[i]);
+                                list_free_items_and_destroy(split);
+                                return error;
+                        }
                 }
+                list_free_items_and_destroy(split);
         }
-        list_free_items_and_destroy(split);
         config->current_bar->modifier = mod;
         sway_log(SWAY_DEBUG,
                         "Show/Hide the bar when pressing '%s' in hide mode.", argv[0]);