Removed traces of Electron

scripts/lib/history.js

@@ -0,0 +1,45 @@
+'use strict'
+
+function History () {
+  this.index = 0
+  this.a = []
+
+  this.clear = function () {
+    this.a = []
+    this.index = 0
+  }
+
+  this.push = function (data) {
+    if (this.index < this.a.length - 1) {
+      this.fork()
+    }
+    this.index = this.a.length
+    this.a = this.a.slice(0, this.index)
+    this.a.push(copy(data))
+
+    if (this.a.length > 20) {
+      this.a.shift()
+    }
+  }
+
+  this.fork = function () {
+    this.a = this.a.slice(0, this.index + 1)
+  }
+
+  this.pop = function () {
+    return this.a.pop()
+  }
+
+  this.prev = function () {
+    this.index = clamp(this.index - 1, 0, this.a.length - 1)
+    return copy(this.a[this.index])
+  }
+
+  this.next = function () {
+    this.index = clamp(this.index + 1, 0, this.a.length - 1)
+    return copy(this.a[this.index])
+  }
+
+  function copy (data) { return data ? JSON.parse(JSON.stringify(data)) : [] }
+  function clamp (v, min, max) { return v < min ? min : v > max ? max : v }
+}