Add third_party/google-input-tools: Take 2

third_party/google_input_tools/third_party/closure_library/closure/goog/async/delay.js

Index: third_party/google_input_tools/third_party/closure_library/closure/goog/async/delay.js
diff --git a/third_party/google_input_tools/third_party/closure_library/closure/goog/async/delay.js b/third_party/google_input_tools/third_party/closure_library/closure/goog/async/delay.js
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@@ -0,0 +1,179 @@
+// Copyright 2007 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Defines a class useful for handling functions that must be
+ * invoked after a delay, especially when that delay is frequently restarted.
+ * Examples include delaying before displaying a tooltip, menu hysteresis,
+ * idle timers, etc.
+ * @author brenneman@google.com (Shawn Brenneman)
+ * @see ../demos/timers.html
+ */
+
+
+goog.provide('goog.Delay');
+goog.provide('goog.async.Delay');
+
+goog.require('goog.Disposable');
+goog.require('goog.Timer');
+
+
+
+/**
+ * A Delay object invokes the associated function after a specified delay. The
+ * interval duration can be specified once in the constructor, or can be defined
+ * each time the delay is started. Calling start on an active delay will reset
+ * the timer.
+ *
+ * @param {Function} listener Function to call when the delay completes.
+ * @param {number=} opt_interval The default length of the invocation delay (in
+ *     milliseconds).
+ * @param {Object=} opt_handler The object scope to invoke the function in.
+ * @constructor
+ * @extends {goog.Disposable}
+ * @final
+ */
+goog.async.Delay = function(listener, opt_interval, opt_handler) {
+  goog.Disposable.call(this);
+
+  /**
+   * The function that will be invoked after a delay.
+   * @type {Function}
+   * @private
+   */
+  this.listener_ = listener;
+
+  /**
+   * The default amount of time to delay before invoking the callback.
+   * @type {number}
+   * @private
+   */
+  this.interval_ = opt_interval || 0;
+
+  /**
+   * The object context to invoke the callback in.
+   * @type {Object|undefined}
+   * @private
+   */
+  this.handler_ = opt_handler;
+
+
+  /**
+   * Cached callback function invoked when the delay finishes.
+   * @type {Function}
+   * @private
+   */
+  this.callback_ = goog.bind(this.doAction_, this);
+};
+goog.inherits(goog.async.Delay, goog.Disposable);
+
+
+
+/**
+ * A deprecated alias.
+ * @deprecated Use goog.async.Delay instead.
+ * @constructor
+ * @final
+ */
+goog.Delay = goog.async.Delay;
+
+
+/**
+ * Identifier of the active delay timeout, or 0 when inactive.
+ * @type {number}
+ * @private
+ */
+goog.async.Delay.prototype.id_ = 0;
+
+
+/**
+ * Disposes of the object, cancelling the timeout if it is still outstanding and
+ * removing all object references.
+ * @override
+ * @protected
+ */
+goog.async.Delay.prototype.disposeInternal = function() {
+  goog.async.Delay.superClass_.disposeInternal.call(this);
+  this.stop();
+  delete this.listener_;
+  delete this.handler_;
+};
+
+
+/**
+ * Starts the delay timer. The provided listener function will be called after
+ * the specified interval. Calling start on an active timer will reset the
+ * delay interval.
+ * @param {number=} opt_interval If specified, overrides the object's default
+ *     interval with this one (in milliseconds).
+ */
+goog.async.Delay.prototype.start = function(opt_interval) {
+  this.stop();
+  this.id_ = goog.Timer.callOnce(
+      this.callback_,
+      goog.isDef(opt_interval) ? opt_interval : this.interval_);
+};
+
+
+/**
+ * Stops the delay timer if it is active. No action is taken if the timer is not
+ * in use.
+ */
+goog.async.Delay.prototype.stop = function() {
+  if (this.isActive()) {
+    goog.Timer.clear(this.id_);
+  }
+  this.id_ = 0;
+};
+
+
+/**
+ * Fires delay's action even if timer has already gone off or has not been
+ * started yet; guarantees action firing. Stops the delay timer.
+ */
+goog.async.Delay.prototype.fire = function() {
+  this.stop();
+  this.doAction_();
+};
+
+
+/**
+ * Fires delay's action only if timer is currently active. Stops the delay
+ * timer.
+ */
+goog.async.Delay.prototype.fireIfActive = function() {
+  if (this.isActive()) {
+    this.fire();
+  }
+};
+
+
+/**
+ * @return {boolean} True if the delay is currently active, false otherwise.
+ */
+goog.async.Delay.prototype.isActive = function() {
+  return this.id_ != 0;
+};
+
+
+/**
+ * Invokes the callback function after the delay successfully completes.
+ * @private
+ */
+goog.async.Delay.prototype.doAction_ = function() {
+  this.id_ = 0;
+  if (this.listener_) {
+    this.listener_.call(this.handler_);
+  }
+};