From 47f27a3dfd0919c1b98b327e88ed0413763f42aa Mon Sep 17 00:00:00 2001
From: Jean-Marc Lenoir <archlinux@jihemel.com>
Date: Sat, 1 Mar 2025 19:54:46 +0100
Subject: [PATCH] Add an option to enable 3-finger or 4-finger drag gesture

---
 metadata/input.xml                | 21 +++++++++++++++++++++
 src/core/seat/pointing-device.cpp | 19 +++++++++++++++++++
 src/core/seat/pointing-device.hpp |  1 +
 3 files changed, 41 insertions(+)

diff --git a/metadata/input.xml b/metadata/input.xml
index 18844499d..f68b35d76 100644
--- a/metadata/input.xml
+++ b/metadata/input.xml
@@ -218,6 +218,27 @@
 				<_long>Enables or disables drag lock.</_long>
 				<default>false</default>
 			</option>
+			<option name="3fg_drag" type="string">
+				<_short>Multi-finger drag</_short>
+				<_long>Enables or disables 3-finger or 4-finger drag. Requires libinput ≥ 1.28.</_long>
+				<default>default</default>
+				<desc>
+					<value>default</value>
+					<_name>Default</_name>
+				</desc>
+				<desc>
+					<value>none</value>
+					<_name>None</_name>
+				</desc>
+				<desc>
+					<value>3fg-drag</value>
+					<_name>Drag using 3 fingers</_name>
+				</desc>
+				<desc>
+					<value>4fg-drag</value>
+					<_name>Drag using 4 fingers</_name>
+				</desc>
+			</option>
 			<option name="touchpad_cursor_speed" type="double">
 				<_short>Touchpad cursor speed</_short>
 				<_long>Changes the touchpad acceleration.</_long>
diff --git a/src/core/seat/pointing-device.cpp b/src/core/seat/pointing-device.cpp
index fafc10959..f385edaf1 100644
--- a/src/core/seat/pointing-device.cpp
+++ b/src/core/seat/pointing-device.cpp
@@ -30,6 +30,7 @@ void wf::pointing_device_t::load_options()
     touchpad_natural_scroll_enabled.load_option(section_name + "/natural_scroll");
     touchpad_tap_and_drag_enabled.load_option(section_name + "/tap_and_drag");
     touchpad_drag_lock_enabled.load_option(section_name + "/drag_lock");
+    touchpad_3fg_drag.load_option(section_name + "/3fg_drag");
 
     mouse_accel_profile.load_option(section_name + "/mouse_accel_profile");
     touchpad_accel_profile.load_option(section_name + "/touchpad_accel_profile");
@@ -147,6 +148,24 @@ void wf::pointing_device_t::update_options()
             LIBINPUT_CONFIG_DRAG_LOCK_ENABLED :
             LIBINPUT_CONFIG_DRAG_LOCK_DISABLED);
 
+        if ((std::string)touchpad_3fg_drag == "default")
+        {
+            libinput_device_config_3fg_drag_set_enabled(dev,
+                libinput_device_config_3fg_drag_get_default_enabled(dev));
+        } else if ((std::string)touchpad_3fg_drag == "none")
+        {
+            libinput_device_config_3fg_drag_set_enabled(dev,
+                LIBINPUT_CONFIG_3FG_DRAG_DISABLED);
+        } else if ((std::string)touchpad_3fg_drag == "3fg-drag")
+        {
+            libinput_device_config_3fg_drag_set_enabled(dev,
+                LIBINPUT_CONFIG_3FG_DRAG_ENABLED_3FG);
+        } else if ((std::string)touchpad_3fg_drag == "4fg-drag")
+        {
+            libinput_device_config_3fg_drag_set_enabled(dev,
+                LIBINPUT_CONFIG_3FG_DRAG_ENABLED_4FG);
+        }
+
         if (libinput_device_config_scroll_has_natural_scroll(dev) > 0)
         {
             libinput_device_config_scroll_set_natural_scroll_enabled(dev,
diff --git a/src/core/seat/pointing-device.hpp b/src/core/seat/pointing-device.hpp
index 45ce8a0c6..d9abaf48b 100644
--- a/src/core/seat/pointing-device.hpp
+++ b/src/core/seat/pointing-device.hpp
@@ -33,6 +33,7 @@ struct pointing_device_t : public input_device_impl_t
     wf::option_wrapper_t<bool> mouse_natural_scroll_enabled;
     wf::option_wrapper_t<bool> touchpad_tap_and_drag_enabled;
     wf::option_wrapper_t<bool> touchpad_drag_lock_enabled;
+    wf::option_wrapper_t<std::string> touchpad_3fg_drag;
 };
 }