Implement default border styles (thanks litemotiv).

src/cfgparse.l

@@ -94,6 +94,9 @@ ipc_socket                      { BEGIN(BIND_AWS_COND); return TOKIPCSOCKET; }
 restart_state                   { BEGIN(BIND_AWS_COND); return TOKRESTARTSTATE; }
 new_container                   { return TOKNEWCONTAINER; }
 new_window                      { return TOKNEWWINDOW; }
+normal                          { return TOK_NORMAL; }
+none                            { return TOK_NONE; }
+1pixel                          { return TOK_1PIXEL; }
 focus_follows_mouse             { return TOKFOCUSFOLLOWSMOUSE; }
 workspace_bar                   { return TOKWORKSPACEBAR; }
 default                         { /* yylval.number = MODE_DEFAULT; */return TOKCONTAINERMODE; }

src/cfgparse.y

@@ -225,6 +225,9 @@ void parse_file(const char *f) {
 %token TOKMODE "mode"
 %token TOKNEWCONTAINER "new_container"
 %token TOKNEWWINDOW "new_window"
+%token TOK_NORMAL "normal"
+%token TOK_NONE "none"
+%token TOK_1PIXEL "1pixel"
 %token TOKFOCUSFOLLOWSMOUSE "focus_follows_mouse"
 %token TOKWORKSPACEBAR "workspace_bar"
 %token TOKCONTAINERMODE "default/stacking/tabbed"
@@ -411,13 +414,19 @@ new_container:
         ;
 
 new_window:
-        TOKNEWWINDOW WHITESPACE WORD
+        TOKNEWWINDOW WHITESPACE border_style
         {
-                DLOG("new windows should start in mode %s\n", $<string>3);
-                config.default_border = sstrdup($<string>3);
+                DLOG("new windows should start with border style %d\n", $<number>3);
+                config.default_border = $<number>3;
         }
         ;
 
+border_style:
+        TOK_NORMAL      { $<number>$ = BS_NORMAL; }
+        | TOK_NONE      { $<number>$ = BS_NONE; }
+        | TOK_1PIXEL    { $<number>$ = BS_1PIXEL; }
+        ;
+
 bool:
         NUMBER
         {

src/con.c

@@ -35,6 +35,7 @@ Con *con_new(Con *parent) {
     TAILQ_INSERT_TAIL(&all_cons, new, all_cons);
     new->type = CT_CON;
     new->name = strdup("");
+    new->border_style = config.default_border;
     static int cnt = 0;
     LOG("opening window %d\n", cnt);
 
@@ -554,6 +555,9 @@ int con_border_style(Con *con) {
     if (con->parent->layout == L_STACKED)
         return BS_NORMAL;
 
+    if (con->parent->layout == L_TABBED && con->border_style != BS_NORMAL)
+        return con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL;
+
     return con->border_style;
 }
 

src/config.c

@@ -365,6 +365,7 @@ void load_configuration(xcb_connection_t *conn, const char *override_configpath,
         INIT_COLOR(config.bar.urgent, "#2f343a", "#900000", "#ffffff");
 
         config.restart_state_path = "~/.i3/_restart.json";
+        config.default_border = BS_NORMAL;
 
         parse_configuration(override_configpath);