Implement 'split'

src/cmdparse.l

@@ -101,6 +101,7 @@ move                            { return TOK_MOVE; }
 open                            { return TOK_OPEN; }
 next                            { return TOK_NEXT; }
 prev                            { return TOK_PREV; }
+split                           { return TOK_SPLIT; }
 horizontal                      { return TOK_HORIZONTAL; }
 vertical                        { return TOK_VERTICAL; }
 

src/cmdparse.y

@@ -113,6 +113,7 @@ void parse_cmd(const char *new) {
 %token TOK_OPEN "open"
 %token TOK_NEXT "next"
 %token TOK_PREV "prev"
+%token TOK_SPLIT "split"
 %token TOK_HORIZONTAL "horizontal"
 %token TOK_VERTICAL "vertical"
 
@@ -256,6 +257,7 @@ operation:
     | fullscreen
     | next
     | prev
+    | split
     ;
 
 exec:
@@ -357,6 +359,14 @@ prev:
     }
     ;
 
+split:
+    TOK_SPLIT WHITESPACE direction
+    {
+        printf("splitting in direction %c\n", $<chr>3);
+        tree_split(focused, ($<chr>3 == 'v' ? VERT : HORIZ));
+    }
+    ;
+
 direction:
     TOK_HORIZONTAL  { $<chr>$ = 'h'; }
     | 'h'           { $<chr>$ = 'h'; }

src/tree.c

@@ -167,6 +167,11 @@ void tree_close_con() {
  *
  */
 void tree_split(Con *con, orientation_t orientation) {
+    /* for a workspace, we just need to change orientation */
+    if (con->parent->type == CT_OUTPUT) {
+        con->orientation = orientation;
+        return;
+    }
     /* 2: replace it with a new Con */
     Con *new = con_new(NULL);
     Con *parent = con->parent;