File 0001-swipeTracker-make-the-number-of-fingers-for-touchpad.patch of Package gnome-shell

From 065e6e35e679785ef6816d75b9159f9d6e49a44e Mon Sep 17 00:00:00 2001
From: Jeff Mahoney <jeffm@suse.com>
Date: Tue, 20 Apr 2021 16:49:39 -0400
Subject: [PATCH] swipeTracker: make the number of fingers for touchpad
 gestures configurable

---
 js/ui/swipeTracker.js |   55 ++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 40 insertions(+), 15 deletions(-)

--- a/js/ui/swipeTracker.js
+++ b/js/ui/swipeTracker.js
@@ -34,8 +34,6 @@ const DURATION_MULTIPLIER = 3;
 const ANIMATION_BASE_VELOCITY = 0.002;
 const EPSILON = 0.005;
 
-const GESTURE_FINGER_COUNT = 3;
-
 /** @enum {number} */
 const State = {
     NONE: 0,
@@ -126,7 +124,8 @@ const TouchpadSwipeGesture = GObject.reg
         if (event.get_gesture_phase() === Clutter.TouchpadGesturePhase.BEGIN)
             this._state = TouchpadState.NONE;
 
-        if (event.get_touchpad_gesture_finger_count() !== GESTURE_FINGER_COUNT)
+        let numFingers = this._touchpadSettings.get_uint('touchpad-gesture-num-fingers');
+        if (event.get_touchpad_gesture_finger_count() !== numFingers)
             return Clutter.EVENT_PROPAGATE;
 
         if ((this._allowedModes & Main.actionMode) === 0)
@@ -469,6 +468,10 @@ export const SwipeTracker = GObject.regi
         this._history = new EventHistory();
         this._reset();
 
+        this._touchpadSettings = new Gio.Settings({
+            schema_id: 'org.gnome.desktop.peripherals.touchpad',
+        });
+
         this._touchpadGesture = new TouchpadSwipeGesture(allowedModes);
         this._touchpadGesture.connect('begin', this._beginGesture.bind(this));
         this._touchpadGesture.connect('update', this._updateGesture.bind(this));
@@ -477,18 +480,9 @@ export const SwipeTracker = GObject.regi
         this.bind_property('orientation', this._touchpadGesture, 'orientation',
             GObject.BindingFlags.SYNC_CREATE);
 
-        this._touchGesture = new TouchSwipeGesture(allowedModes,
-            GESTURE_FINGER_COUNT,
-            Clutter.GestureTriggerEdge.AFTER);
-        this._touchGesture.connect('begin', this._beginTouchSwipe.bind(this));
-        this._touchGesture.connect('update', this._updateGesture.bind(this));
-        this._touchGesture.connect('end', this._endTouchGesture.bind(this));
-        this._touchGesture.connect('cancel', this._cancelTouchGesture.bind(this));
-        this.bind_property('enabled', this._touchGesture, 'enabled', 0);
-        this.bind_property('orientation', this._touchGesture, 'orientation',
-            GObject.BindingFlags.SYNC_CREATE);
-        this.bind_property('distance', this._touchGesture, 'distance', 0);
-        global.stage.add_action_full('swipe', Clutter.EventPhase.CAPTURE, this._touchGesture);
+        let numFingers = this._touchpadSettings.get_uint('touchpad-gesture-num-fingers');
+        this._setupTouchSwipe(numFingers);
+        this._changedID = this._touchpadSettings.connect('changed', this._changed.bind(this));
 
         if (params.allowDrag) {
             this._dragGesture = new TouchSwipeGesture(allowedModes, 1,
@@ -521,6 +515,34 @@ export const SwipeTracker = GObject.regi
         }
     }
 
+    _setupTouchSwipe(numFingers) {
+        this._touchGesture = new TouchSwipeGesture(this._allowedModes, numFingers,
+            Clutter.GestureTriggerEdge.AFTER);
+        this._touchGesture.connect('begin', this._beginTouchSwipe.bind(this));
+        this._touchGesture.connect('update', this._updateGesture.bind(this));
+        this._touchGesture.connect('end', this._endTouchGesture.bind(this));
+        this._touchGesture.connect('cancel', this._cancelTouchGesture.bind(this));
+        this.bind_property('enabled', this._touchGesture, 'enabled', 0);
+        this.bind_property('orientation', this._touchGesture, 'orientation',
+            GObject.BindingFlags.SYNC_CREATE);
+        this.bind_property('distance', this._touchGesture, 'distance', 0);
+        global.stage.add_action_full('swipe', Clutter.EventPhase.CAPTURE, this._touchGesture);
+
+        this._numFingers = numFingers;
+    }
+
+    _changed() {
+        let numFingers = this._touchpadSettings.get_uint('touchpad-gesture-num-fingers');
+        if (numFingers != this._numFingers) {
+            if (this._touchGesture) {
+                global.stage.remove_action(this._touchGesture);
+                delete this._touchGesture;
+            }
+
+            this._setupTouchSwipe(numFingers);
+        }
+    }
+
     /**
      * canHandleScrollEvent:
      * This function can be used to combine swipe gesture and mouse
@@ -770,6 +792,9 @@ export const SwipeTracker = GObject.regi
     }
 
     destroy() {
+        if (this._changedID)
+            this._touchpadSettings.disconnect(this._changedID);
+
         if (this._touchpadGesture) {
             this._touchpadGesture.destroy();
             delete this._touchpadGesture;