add --i3 flag to hide_edge_borders

Enables i3-compatible behavior regarding hiding the title bar on tabbed and
stacked containers with one child.

Related issues and merge requests: #3031, #3002, #2912, #2987.

1 files changed, 8 insertions, 2 deletions

diff --git a/sway/commands/hide_edge_borders.c b/sway/commands/hide_edge_borders.c
index 84a217b8..6120a17f 100644
--- a/sway/commands/hide_edge_borders.c
+++ b/sway/commands/hide_edge_borders.c
@@ -5,10 +5,16 @@
 
 struct cmd_results *cmd_hide_edge_borders(int argc, char **argv) {
         struct cmd_results *error = NULL;
-        if ((error = checkarg(argc, "hide_edge_borders", EXPECTED_EQUAL_TO, 1))) {
+        if ((error = checkarg(argc, "hide_edge_borders", EXPECTED_AT_LEAST, 1))) {
                 return error;
         }
 
+        if (strcmp(*argv, "--i3") == 0) {
+                config->hide_lone_tab = true;
+                ++argv;
+                --argc;
+        }
+
         if (strcmp(argv[0], "none") == 0) {
                 config->hide_edge_borders = E_NONE;
         } else if (strcmp(argv[0], "vertical") == 0) {
@@ -23,7 +29,7 @@ struct cmd_results *cmd_hide_edge_borders(int argc, char **argv) {
                 config->hide_edge_borders = E_SMART_NO_GAPS;
         } else {
                 return cmd_results_new(CMD_INVALID, "Expected 'hide_edge_borders "
-                                "<none|vertical|horizontal|both|smart|smart_no_gaps>'");
+                                "[--i3] <none|vertical|horizontal|both|smart|smart_no_gaps>'");
         }
         config->saved_edge_borders = config->hide_edge_borders;