Remove irrelevant double tracking bug in error log (#53)

* Do not show double tracking

* Do not show double tracking in debug and start

Author: Hikari9

lib/gesture/swipe_gesture.cpp

@@ -86,7 +86,8 @@ namespace comfortable_swipe::gesture
         float scale = this->previous_gesture == swipe_gesture::FRESH
             ? 1.00f
             : 0.01f; // square root of 1/10
-        if (this->x * this->x + this->y * this->y > this->threshold_squared * scale)
+        static const float EPSILON = 1e-6f;
+        if (this->x * this->x + this->y * this->y > this->threshold_squared * scale - EPSILON)
         {
             int mask = 0;
             if (this->fingers == 3) mask |= swipe_gesture::MSK_THREE_FINGERS;

lib/service/debug.cpp

@@ -28,7 +28,7 @@ namespace comfortable_swipe::service
      */
     void debug()
     {
-        (void) std::system("stdbuf -oL -e0 libinput debug-events");
+        (void) std::system("bash -c \"stdbuf -oL -e0 libinput debug-events 2> >(grep -v 'double tracking')\"");
     }
 }
 

lib/service/start.cpp

@@ -31,7 +31,7 @@ namespace comfortable_swipe::service
      */
     void start()
     {
-        (void) std::system("stdbuf -oL -e0 libinput debug-events | " __COMFORTABLE_SWIPE__PROGRAM__ " buffer");
+        (void) std::system(__COMFORTABLE_SWIPE__PROGRAM__ " debug | " __COMFORTABLE_SWIPE__PROGRAM__ " buffer");
     }
 }