首次提交

2026-07-13 12:06:16 +08:00
commit e3c810b1a6
1690 changed files with 228324 additions and 0 deletions
@@ -0,0 +1,82 @@
+'use strict'
+
+const getTime = require('./time')
+const { clearTimeout, setTimeout } = require('./timers')
+
+class Retimer {
+  constructor (callback, timeout, args) {
+    const that = this
+
+    this._started = getTime()
+    this._rescheduled = 0
+    this._scheduled = timeout
+    this._args = args
+    this._triggered = false
+
+    this._timerWrapper = () => {
+      if (that._rescheduled > 0) {
+        that._scheduled = that._rescheduled - (getTime() - that._started)
+        that._schedule(that._scheduled)
+      } else {
+        that._triggered = true
+        callback.apply(null, that._args)
+      }
+    }
+
+    this._timer = setTimeout(this._timerWrapper, timeout)
+  }
+
+  reschedule (timeout) {
+    if (!timeout) {
+      timeout = this._scheduled
+    }
+    const now = getTime()
+    if ((now + timeout) - (this._started + this._scheduled) < 0) {
+      clearTimeout(this._timer)
+      this._schedule(timeout)
+    } else if (!this._triggered) {
+      this._started = now
+      this._rescheduled = timeout
+    } else {
+      this._schedule(timeout)
+    }
+  }
+
+  _schedule (timeout) {
+    this._triggered = false
+    this._started = getTime()
+    this._rescheduled = 0
+    this._scheduled = timeout
+    this._timer = setTimeout(this._timerWrapper, timeout)
+  }
+
+  clear () {
+    clearTimeout(this._timer)
+  }
+}
+
+function retimer () {
+  if (typeof arguments[0] !== 'function') {
+    throw new Error('callback needed')
+  }
+
+  if (typeof arguments[1] !== 'number') {
+    throw new Error('timeout needed')
+  }
+
+  let args
+
+  if (arguments.length > 0) {
+    args = new Array(arguments.length - 2)
+
+    /* eslint-disable no-var */
+    for (var i = 0; i < args.length; i++) {
+      args[i] = arguments[i + 2]
+    }
+  }
+
+  return new Retimer(arguments[0], arguments[1], args)
+}
+
+module.exports = retimer
+module.exports.Retimer = Retimer