@hscmap/magic-trackpad-detector - npm Package Compare versions

Comparing version 0.0.2 to 0.0.3

lib/index.d.ts

 export declare class MagicTrackpadDetector {
-    private history;
     tolerance: number;
     interval: number;
-    minN: number;
+    minN1: number;
+    minN2: number;
+    private history;
     inertial(e: WheelEvent): boolean;
 }

lib/index.js

@@ -5,6 +5,7 @@ "use strict";
     function MagicTrackpadDetector() {
-        this.history = new RingBuffer(20);
         this.tolerance = 7; // ms
         this.interval = 1000 / 60; // events per second
-        this.minN = 5;
+        this.minN1 = 7;
+        this.minN2 = 15;
+        this.history = new RingBuffer(Math.max(this.minN1, this.minN2));
     }
@@ -16,13 +17,32 @@ MagicTrackpadDetector.prototype.inertial = function (e) {
         h.push([t0, d0]);
-        if (h.length < this.minN)
+        if (h.length < this.minN1)
             return false;
-        for (var i = this.minN - 1; i > 1; --i) {
-            var o = h.at(-i);
-            var n = h.at(-i + 1);
-            var dt = n[0] - o[0];
-            var dv = n[1] - o[1];
-            if (dv != 0 && (dt < this.interval - this.tolerance || this.interval + this.tolerance < dt))
+        if (Math.abs(e.deltaY) > 1) {
+            for (var i = this.minN1 - 1; i > 1; --i) {
+                var o = h.at(-i);
+                var n = h.at(-i + 1);
+                var dt = n[0] - o[0];
+                if (dt < this.interval - this.tolerance || this.interval + this.tolerance < dt)
+                    return false;
+                if (n[1] * o[1] < 0 || n[1] / o[1] > 1)
+                    return false;
+            }
+        }
+        else {
+            if (h.length < this.minN2)
                 return false;
-            if (n[1] * o[1] < 0 || n[1] / o[1] > 1)
+            var _a = h.at(-this.minN2), to = _a[0], vo = _a[1];
+            if (Math.abs(vo) <= 1 || t0 - to > 2 * this.interval * this.minN2) {
                 return false;
+            }
+            for (var i = this.minN2 - 1; i > 1; --i) {
+                var o = h.at(-i);
+                var n = h.at(-i + 1);
+                var dt = n[0] - o[0];
+                if (!(this.interval - this.tolerance <= dt && dt <= this.interval + this.tolerance ||
+                    2 * this.interval - this.tolerance <= dt && dt <= 2 * this.interval + this.tolerance))
+                    return false;
+                if (n[1] * o[1] < 0 || n[1] / o[1] > 1)
+                    return false;
+            }
         }
@@ -29,0 +49,0 @@ return true;

package.json

 {
   "name": "@hscmap/magic-trackpad-detector",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "main": "./lib/index.js",
@@ -5,0 +5,0 @@ "types": "./lib/index.d.ts",

README.md

 # Magic Trackpad's inertial scroll Detector
-* Apple's Magic trackpad emits *pseudo inertial* scroll event. This module determines wheter a wheel event is a **real** event (generated by a user's action)Ï or a **pseudo inertial** event.
+* Apple's Magic trackpad emits *pseudo inertial* scroll event. This module determines wheter a wheel event is a **real** event (generated by a user's action) or a **pseudo inertial** event.
 * [Working Demo](https://michitaro.github.io/magic-trackpad-detector)
@@ -100,2 +100,2 @@
 }
-```
+```

src/index.ts

 export class MagicTrackpadDetector {
-    private history = new RingBuffer<[number, number]>(20)
     tolerance = 7 // ms
     interval = 1000 / 60 // events per second
-    minN = 5
+    minN1 = 7
+    minN2 = 15
+    private history = new RingBuffer<[number, number]>(Math.max(this.minN1, this.minN2))
 
@@ -12,13 +13,38 @@ inertial(e: WheelEvent) {
         h.push([t0, d0])
-        if (h.length < this.minN)
+
+        if (h.length < this.minN1)
             return false
-        for (let i = this.minN - 1; i > 1; --i) {
-            const o = h.at(-i)
-            const n = h.at(-i + 1)
-            const dt = n[0] - o[0]
-            const dv = n[1] - o[1]
-            if (dv != 0 && (dt < this.interval - this.tolerance || this.interval + this.tolerance < dt))
+
+        if (Math.abs(e.deltaY) > 1) {
+            for (let i = this.minN1 - 1; i > 1; --i) {
+                const o = h.at(-i)
+                const n = h.at(-i + 1)
+                const dt = n[0] - o[0]
+                if (dt < this.interval - this.tolerance || this.interval + this.tolerance < dt)
+                    return false
+                if (n[1] * o[1] < 0 || n[1] / o[1] > 1)
+                    return false
+            }
+        }
+        else {
+            if (h.length < this.minN2)
                 return false
-            if (n[1] * o[1] < 0 || n[1] / o[1] > 1)
+            const [to, vo] = h.at(- this.minN2)
+            if (Math.abs(vo) <= 1 || t0 - to > 2 * this.interval * this.minN2) {
                 return false
+            }
+            for (let i = this.minN2 - 1; i > 1; --i) {
+                const o = h.at(-i)
+                const n = h.at(-i + 1)
+                const dt = n[0] - o[0]
+                if (
+                    !(
+                        this.interval - this.tolerance <= dt && dt <= this.interval + this.tolerance ||
+                        2 * this.interval - this.tolerance <= dt && dt <= 2 * this.interval + this.tolerance
+                    )
+                )
+                    return false
+                if (n[1] * o[1] < 0 || n[1] / o[1] > 1)
+                    return false
+            }
         }
@@ -25,0 +51,0 @@ return true

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Improved metrics

Total package byte prevSize

147158

increased by1.28%

Lines of code

272

increased by19.82%

Number of lines in readme file

101

increased by1%

No dependency changes