Implement configurable wrapping on bar ws scroll

1 files changed, 31 insertions, 0 deletions

diff --git a/swaybar/bar.c b/swaybar/bar.c
index 9009e1ff..41538052 100644
--- a/swaybar/bar.c
+++ b/swaybar/bar.c
@@ -96,6 +96,37 @@ static void mouse_button_notify(struct window *window, int x, int y,
 static void mouse_scroll_notify(struct window *window, enum scroll_direction direction) {
         sway_log(L_DEBUG, "Mouse wheel scrolled %s", direction == SCROLL_UP ? "up" : "down");
 
+        if (!swaybar.config->wrap_scroll) {
+                // Find output this window lives on
+                int i;
+                struct output *output;
+                for (i = 0; i < swaybar.outputs->length; ++i) {
+                        output = swaybar.outputs->items[i];
+                        if (output->window == window) {
+                                break;
+                        }
+                }
+                if (!sway_assert(i != swaybar.outputs->length, "Unknown window in scroll event")) {
+                        return;
+                }
+                int focused = -1;
+                for (i = 0; i < output->workspaces->length; ++i) {
+                        struct workspace *ws = output->workspaces->items[i];
+                        if (ws->focused) {
+                                focused = i;
+                                break;
+                        }
+                }
+                if (!sway_assert(focused != -1, "Scroll wheel event received on inactive output")) {
+                        return;
+                }
+                if ((focused == 0 && direction == SCROLL_UP) ||
+                                (focused == output->workspaces->length - 1 && direction == SCROLL_DOWN)) {
+                        // Do not wrap
+                        return;
+                }
+        }
+
         const char *workspace_name = direction == SCROLL_UP ? "prev_on_output" : "next_on_output";
         ipc_send_workspace_command(workspace_name);
 }