From 2297530cb1149752445b586b337e5c8d3b7bb108 Mon Sep 17 00:00:00 2001
From: Alexis Hovorka <alexisspacegirl@gmail.com>
Date: Sun, 16 May 2021 22:40:33 -0600
Subject: [feat] Long press 3+ fingers to set home position

---
 lib/motion.js | 52 ++++++++++++++++++++++++++++++----------------------
 1 file changed, 30 insertions(+), 22 deletions(-)

(limited to 'lib/motion.js')

diff --git a/lib/motion.js b/lib/motion.js
index 781d54b..3e24962 100644
--- a/lib/motion.js
+++ b/lib/motion.js
@@ -1,18 +1,19 @@
 const util = require("util")
     , EventEmitter = require("events").EventEmitter;
 
-const longTime = 600;
+//const slotToPoint = s => ({xi:s.xi, yi:s.yi, xf:s.x, yf:s.y});
+const slotToPoint = s => ({
+  i:{x:s.xi, y:s.yi}, f:{x:s.x, y:s.y},
+  m:{x:(s.xi+s.x)/2, y:(s.yi+s.y)/2}
+});
 
-//const clone = x => JSON.parse(JSON.stringify(x)); // Deep
-const clone = x => Object.assign({}, x); // Shallow
-const slotToPoint = s => ({xi:s.xi, yi:s.yi, xf:s.x, yf:s.y});
-
-function Motion(device) {
+function Motion(device, longTime) {
   this.device = device;
-  this.slotsUsed = 0;
+  this.slotsActive = 0;
   this.slots = [];
   this.points = [];
   this.longed = false;
+  this.longTime = longTime || 600;
 
   device.on("EV_ABS", e => this.doABS(e));
   device.on("EV_SYN", e => this.doSYN(e));
@@ -44,13 +45,16 @@ switch (e.code) {
     break;
 
   case "ABS_MT_TRACKING_ID":
-    if (!this.currentSlot) return;
+    if (this.currentSlot === undefined) {
+      this.addSlot();
+      this.currentSlot = this.slots[0];
+    }
+
     if (e.value >= 0) {
       this.currentSlot.id = e.value;
-      if (this.slotsUsed++ === 0) {
-        //this.start = e.time;
+      if (this.slotsActive++ === 0) {
         this.longTimeout = setTimeout(() =>
-          this.emitLong(), longTime);
+          this.emitLong(), this.longTime);
       }
 
     } else {
@@ -61,26 +65,25 @@ switch (e.code) {
       this.currentSlot.yi = -1;
       this.currentSlot.x = 0;
       this.currentSlot.y = 0;
-      if (--this.slotsUsed === 0) {
-        //this.end = e.time;
+      if (--this.slotsActive === 0) {
         clearTimeout(this.longTimeout);
       }
     } break;
 
   case "ABS_MT_POSITION_X":
-    if (!this.currentSlot) return;
+    if (this.currentSlot === undefined) return;
     if (this.currentSlot.id < 0) return;
-    this.currentSlot.x = e.value;
     if (this.currentSlot.xi < 0)
       this.currentSlot.xi = e.value;
+    this.currentSlot.x = e.value;
     break;
 
   case "ABS_MT_POSITION_Y":
-    if (!this.currentSlot) return;
+    if (this.currentSlot === undefined) return;
     if (this.currentSlot.id < 0) return;
-    this.currentSlot.y = e.value;
     if (this.currentSlot.yi < 0)
       this.currentSlot.yi = e.value;
+    this.currentSlot.y = e.value;
     break;
 
   //default:
@@ -88,11 +91,16 @@ switch (e.code) {
 }};
 
 Motion.prototype.doSYN = function(e) {
-  if (e.code === "SYN_REPORT" && this.slotsUsed === 0) {
-    if (this.longed) { this.longed = false;
-    } else if (this.points.length > 0) {
-      this.emit("short", this.points);
-      this.points = [];
+  if (e.code === "SYN_REPORT") {
+    //console.log("SYN", this.slotsActive, this.points.length);
+    if (this.slotsActive <= 0) {
+      this.slotsActive = 0;
+
+      if (this.longed) { this.longed = false;
+      } else if (this.points.length > 0) {
+        this.emit("short", this.points);
+        this.points = [];
+      }
     }
   }
 };
-- 
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