Changed workspace name generation to try and use bindsyms when possible

sway/workspace.c

@@ -12,7 +12,42 @@ swayc_t *active_workspace = NULL;
 int ws_num = 1;
 
 char *workspace_next_name(void) {
-	int l = 1;
+	int i;
+    // Scan all workspace bindings to find the next available workspace name,
+    // if none are found/available then default to a number
+	struct sway_mode *mode = config->current_mode;
+
+	for (i = 0; i < mode->bindings->length; ++i) {
+		const char* command = *binding = mode->bindings->items[i]->command;
+	    list_t *args = split_string(command, " ");
+
+        if (strcmp("workspace", args->items[0]) == 0 && args->length > 2) {
+            const char* target = args->items[1];
+
+            while (*target == ' ' || *target == '\t')
+                target++; 
+
+            // Make sure that the command references an actual workspace
+            // not a command about workspaces
+            if (strcmp(target, "next") == 0 ||
+                strcmp(target, "prev") == 0 ||
+                strcmp(target, "next_on_output") == 0 ||
+                strcmp(target, "prev_on_output") == 0 ||
+                strcmp(target, "number") == 0 ||
+                strcmp(target, "back_and_forth") == 0 ||
+                strcmp(target, "current") == 0)
+                continue;
+           
+            //Make sure that the workspace doesn't already exist 
+            if (workspace_find_by_name(args->items[2]))
+               continue; 
+
+            return args->items[2];        
+        }
+    }
+    // As a fall back, get the current number of active workspaces
+    // and return that + 1 for the next workspace's name
+	int ws_num = root_container.children->length;
 	if (ws_num >= 10) {
 		l = 2;
 	} else if (ws_num >= 100) {