Implement scroll wheel workspace switching

1 files changed, 40 insertions, 4 deletions

diff --git a/swaybar/bar.c b/swaybar/bar.c
index e7b8b2ca..5679a892 100644
--- a/swaybar/bar.c
+++ b/swaybar/bar.c
@@ -24,6 +24,7 @@
 #include "swaybar/ipc.h"
 #include "ipc-client.h"
 #include "list.h"
+#include "log.h"
 #include "pango.h"
 #include "pool-buffer.h"
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
@@ -67,6 +68,13 @@ static void wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
                 wl_fixed_t surface_x, wl_fixed_t surface_y) {
         struct swaybar *bar = data;
         struct swaybar_pointer *pointer = &bar->pointer;
+        struct swaybar_output *output;
+        wl_list_for_each(output, &bar->outputs, link) {
+                if (output->surface == surface) {
+                        pointer->current = output;
+                        break;
+                }
+        }
         wl_surface_attach(pointer->cursor_surface,
                         wl_cursor_image_get_buffer(pointer->cursor_image), 0, 0);
         wl_pointer_set_cursor(wl_pointer, serial, pointer->cursor_surface,
@@ -77,12 +85,12 @@ static void wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
 
 static void wl_pointer_leave(void *data, struct wl_pointer *wl_pointer,
                 uint32_t serial, struct wl_surface *surface) {
-        // Who cares
+        struct swaybar *bar = data;
+        bar->pointer.current = NULL;
 }
 
 static void wl_pointer_motion(void *data, struct wl_pointer *wl_pointer,
                 uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y) {
-        wlr_log(L_DEBUG, "motion");
         // TODO
 }
 
@@ -94,8 +102,36 @@ static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
 
 static void wl_pointer_axis(void *data, struct wl_pointer *wl_pointer,
                 uint32_t time, uint32_t axis, wl_fixed_t value) {
-        wlr_log(L_DEBUG, "axis");
-        // TODO
+        struct swaybar *bar = data;
+        struct swaybar_output *output = bar->pointer.current;
+        if (!output) {
+                return;
+        }
+        double amt = wl_fixed_to_double(value);
+        if (!bar->config->wrap_scroll) {
+                int i = 0;
+                struct swaybar_workspace *ws = NULL;
+                wl_list_for_each(ws, &output->workspaces, link) {
+                        if (ws->focused) {
+                                break;
+                        }
+                        ++i;
+                }
+                int len = wl_list_length(&output->workspaces);
+                if (!sway_assert(i != len, "axis with null workspace")) {
+                        return;
+                }
+                if (i == 0 && amt > 0) {
+                        return; // Do not wrap
+                }
+                if (i == len - 1 && amt < 0) {
+                        return; // Do not wrap
+                }
+        }
+
+        const char *workspace_name =
+                amt < 0 ?  "prev_on_output" : "next_on_output";
+        ipc_send_workspace_command(bar, workspace_name);
 }
 
 static void wl_pointer_frame(void *data, struct wl_pointer *wl_pointer) {