input: move <scrollFactor> to <libinput> section

This allows per-device configuration of scroll factor (e.g. setting
different scroll factors for mice and touchpads).

src/config/libinput.c

@@ -26,6 +26,7 @@ libinput_category_init(struct libinput_category *l)
 	l->click_method = -1;
 	l->send_events_mode = -1;
 	l->have_calibration_matrix = false;
+	l->scroll_factor = 1.0;
 }
 
 enum lab_libinput_device_type

src/config/rcxml.c

@@ -63,6 +63,8 @@ static struct window_rule *current_window_rule;
 static struct action *current_window_rule_action;
 static struct view_query *current_view_query;
 static struct action *current_child_action;
+/* for backword compatibility of <mouse><scrollFactor> */
+static double mouse_scroll_factor = -1;
 
 enum font_place {
 	FONT_PLACE_NONE = 0,
@@ -733,6 +735,8 @@ fill_libinput_category(char *nodename, char *content)
 			current_libinput_category->have_calibration_matrix = false;
 		}
 		g_strfreev(elements);
+	} else if (!strcasecmp(nodename, "scrollFactor")) {
+		set_double(content, &current_libinput_category->scroll_factor);
 	}
 }
 
@@ -1011,7 +1015,8 @@ entry(xmlNode *node, char *nodename, char *content)
 			wlr_log(WLR_ERROR, "invalid doubleClickTime");
 		}
 	} else if (!strcasecmp(nodename, "scrollFactor.mouse")) {
-		set_double(content, &rc.scroll_factor);
+		/* This is deprecated. Show an error message in post_processing() */
+		set_double(content, &mouse_scroll_factor);
 	} else if (!strcasecmp(nodename, "name.context.mouse")) {
 		current_mouse_context = content;
 		current_mousebind = NULL;
@@ -1345,7 +1350,6 @@ rcxml_init(void)
 	rc.raise_on_focus = false;
 
 	rc.doubleclick_time = 500;
-	rc.scroll_factor = 1.0;
 
 	rc.tablet.force_mouse_emulation = false;
 	rc.tablet.output_name = NULL;
@@ -1596,12 +1600,21 @@ post_processing(void)
 		rc.font_osd.name = xstrdup("sans");
 	}
 	if (!libinput_category_get_default()) {
-		/* So we still allow tap to click by default */
+		/* So we set default values of <tap> and <scrollFactor> */
 		struct libinput_category *l = libinput_category_create();
 		/* Prevents unused variable warning when compiled without asserts */
 		(void)l;
 		assert(l && libinput_category_get_default() == l);
 	}
+	if (mouse_scroll_factor >= 0) {
+		wlr_log(WLR_ERROR, "<mouse><scrollFactor> is deprecated"
+				" and overwrites <libinput><scrollFactor>."
+				" Use only <libinput><scrollFactor>.");
+		struct libinput_category *l;
+		wl_list_for_each(l, &rc.libinput_categories, link) {
+			l->scroll_factor = mouse_scroll_factor;
+		}
+	}
 
 	int nr_workspaces = wl_list_length(&rc.workspace_config.workspaces);
 	if (nr_workspaces < rc.workspace_config.min_nr_workspaces) {
@@ -1884,4 +1897,5 @@ rcxml_finish(void)
 	current_field = NULL;
 	current_window_rule = NULL;
 	current_window_rule_action = NULL;
+	mouse_scroll_factor = -1;
 }

src/input/cursor.c

@@ -1335,6 +1335,13 @@ cursor_axis(struct wl_listener *listener, void *data)
 	struct seat *seat = wl_container_of(listener, seat, cursor_axis);
 	struct wlr_pointer_axis_event *event = data;
 	struct server *server = seat->server;
+
+	/* input->scroll_factor is set for pointer/touch devices */
+	assert(event->pointer->base.type == WLR_INPUT_DEVICE_POINTER
+		|| event->pointer->base.type == WLR_INPUT_DEVICE_TOUCH);
+	struct input *input = event->pointer->base.data;
+	double scroll_factor = input->scroll_factor;
+
 	struct cursor_context ctx = get_cursor_context(server);
 	idle_manager_notify_activity(seat->seat);
 
@@ -1349,8 +1356,8 @@ cursor_axis(struct wl_listener *listener, void *data)
 
 		/* Notify the client with pointer focus of the axis event. */
 		wlr_seat_pointer_notify_axis(seat->seat, event->time_msec,
-			event->orientation, rc.scroll_factor * event->delta,
-			round(rc.scroll_factor * event->delta_discrete),
+			event->orientation, scroll_factor * event->delta,
+			round(scroll_factor * event->delta_discrete),
 			event->source, event->relative_direction);
 	}
 }

src/seat.c

@@ -114,7 +114,11 @@ configure_libinput(struct wlr_input_device *wlr_input_device)
 		wlr_log(WLR_ERROR, "no wlr_input_device");
 		return;
 	}
+	struct input *input = wlr_input_device->data;
+
+	/* Set scroll factor to 1.0 for Wayland/X11 backends or virtual pointers */
 	if (!wlr_input_device_is_libinput(wlr_input_device)) {
+		input->scroll_factor = 1.0;
 		return;
 	}
 
@@ -247,6 +251,9 @@ configure_libinput(struct wlr_input_device *wlr_input_device)
 		wlr_log(WLR_INFO, "calibration matrix configured");
 		libinput_device_config_calibration_set_matrix(libinput_dev, dc->calibration_matrix);
 	}
+
+	wlr_log(WLR_INFO, "scroll factor configured");
+	input->scroll_factor = dc->scroll_factor;
 }
 
 static struct wlr_output *
@@ -286,6 +293,7 @@ new_pointer(struct seat *seat, struct wlr_input_device *dev)
 {
 	struct input *input = znew(*input);
 	input->wlr_input_device = dev;
+	dev->data = input;
 	configure_libinput(dev);
 	wlr_cursor_attach_input_device(seat->cursor, dev);
 
@@ -354,6 +362,7 @@ new_touch(struct seat *seat, struct wlr_input_device *dev)
 {
 	struct input *input = znew(*input);
 	input->wlr_input_device = dev;
+	dev->data = input;
 	configure_libinput(dev);
 	wlr_cursor_attach_input_device(seat->cursor, dev);
 	/* In support of running with WLR_WL_OUTPUTS set to >=2 */