Add heuristics to differentiate touchpads

Use libinput_device_config_tap_get_finger_count to determine whether
a pointer is a touchpad.

swaymsg is also updated to reflect the new touchpad type.

4 files changed, 38 insertions, 19 deletions

diff --git a/include/sway/input/input-manager.h b/include/sway/input/input-manager.h
index e166a237..8d4a5b00 100644
--- a/include/sway/input/input-manager.h
+++ b/include/sway/input/input-manager.h
@@ -62,4 +62,6 @@ struct input_config *input_device_get_config(struct sway_input_device *device);
 
 char *input_device_get_identifier(struct wlr_input_device *device);
 
+const char *input_device_get_type(struct sway_input_device *device);
+
 #endif
diff --git a/sway/input/input-manager.c b/sway/input/input-manager.c
index adb36af9..0c5254bd 100644
--- a/sway/input/input-manager.c
+++ b/sway/input/input-manager.c
@@ -71,6 +71,40 @@ char *input_device_get_identifier(struct wlr_input_device *device) {
         return identifier;
 }
 
+static bool device_is_touchpad(struct sway_input_device *device) {
+        if (device->wlr_device->type != WLR_INPUT_DEVICE_POINTER ||
+                        !wlr_input_device_is_libinput(device->wlr_device)) {
+                return false;
+        }
+
+        struct libinput_device *libinput_device =
+                wlr_libinput_get_device_handle(device->wlr_device);
+
+        return libinput_device_config_tap_get_finger_count(libinput_device) > 0;
+}
+
+const char *input_device_get_type(struct sway_input_device *device) {
+        switch (device->wlr_device->type) {
+        case WLR_INPUT_DEVICE_POINTER:
+                if (device_is_touchpad(device)) {
+                        return "touchpad";
+                } else {
+                        return "pointer";
+                }
+        case WLR_INPUT_DEVICE_KEYBOARD:
+                return "keyboard";
+        case WLR_INPUT_DEVICE_TOUCH:
+                return "touch";
+        case WLR_INPUT_DEVICE_TABLET_TOOL:
+                return "tablet_tool";
+        case WLR_INPUT_DEVICE_TABLET_PAD:
+                return "tablet_pad";
+        case WLR_INPUT_DEVICE_SWITCH:
+                return "switch";
+        }
+        return "unknown";
+}
+
 static struct sway_input_device *input_sway_device_from_wlr(
                 struct wlr_input_device *device) {
         struct sway_input_device *input_device = NULL;
diff --git a/sway/ipc-json.c b/sway/ipc-json.c
index c320d958..4ccf6dfd 100644
--- a/sway/ipc-json.c
+++ b/sway/ipc-json.c
@@ -85,24 +85,6 @@ static const char *ipc_json_output_transform_description(enum wl_output_transfor
         return NULL;
 }
 
-static const char *ipc_json_device_type_description(struct sway_input_device *device) {
-        switch (device->wlr_device->type) {
-        case WLR_INPUT_DEVICE_POINTER:
-                return "pointer";
-        case WLR_INPUT_DEVICE_KEYBOARD:
-                return "keyboard";
-        case WLR_INPUT_DEVICE_SWITCH:
-                return "switch";
-        case WLR_INPUT_DEVICE_TOUCH:
-                return "touch";
-        case WLR_INPUT_DEVICE_TABLET_TOOL:
-                return "tablet_tool";
-        case WLR_INPUT_DEVICE_TABLET_PAD:
-                return "tablet_pad";
-        }
-        return "unknown";
-}
-
 json_object *ipc_json_get_version(void) {
         int major = 0, minor = 0, patch = 0;
         json_object *version = json_object_new_object();
@@ -819,7 +801,7 @@ json_object *ipc_json_describe_input(struct sway_input_device *device) {
                 json_object_new_int(device->wlr_device->product));
         json_object_object_add(object, "type",
                 json_object_new_string(
-                        ipc_json_device_type_description(device)));
+                        input_device_get_type(device)));
 
         if (device->wlr_device->type == WLR_INPUT_DEVICE_KEYBOARD) {
                 struct wlr_keyboard *keyboard = device->wlr_device->keyboard;
diff --git a/swaymsg/main.c b/swaymsg/main.c
index f86000a4..e2c43445 100644
--- a/swaymsg/main.c
+++ b/swaymsg/main.c
@@ -98,6 +98,7 @@ static const char *pretty_type_name(const char *name) {
         } type_names[] = {
                 { "keyboard", "Keyboard" },
                 { "pointer", "Mouse" },
+                { "touchpad", "Touchpad" },
                 { "tablet_pad", "Tablet pad" },
                 { "tablet_tool", "Tablet tool" },
                 { "touch", "Touch" },