Add third_party/google-input-tools: Take 2

third_party/google_input_tools/third_party/closure_library/closure/goog/timer/timer.js

Index: third_party/google_input_tools/third_party/closure_library/closure/goog/timer/timer.js
diff --git a/third_party/google_input_tools/third_party/closure_library/closure/goog/timer/timer.js b/third_party/google_input_tools/third_party/closure_library/closure/goog/timer/timer.js
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index 0000000000000000000000000000000000000000..ccee170d00cc3cc79bbf58d1836e2517bf0e7cc1
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+++ b/third_party/google_input_tools/third_party/closure_library/closure/goog/timer/timer.js
@@ -0,0 +1,292 @@
+// Copyright 2006 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 A timer class to which other classes and objects can
+ * listen on.  This is only an abstraction above setInterval.
+ *
+ * @see ../demos/timers.html
+ */
+
+goog.provide('goog.Timer');
+
+goog.require('goog.events.EventTarget');
+
+
+
+/**
+ * Class for handling timing events.
+ *
+ * @param {number=} opt_interval Number of ms between ticks (Default: 1ms).
+ * @param {Object=} opt_timerObject  An object that has setTimeout, setInterval,
+ *     clearTimeout and clearInterval (eg Window).
+ * @constructor
+ * @extends {goog.events.EventTarget}
+ */
+goog.Timer = function(opt_interval, opt_timerObject) {
+  goog.events.EventTarget.call(this);
+
+  /**
+   * Number of ms between ticks
+   * @type {number}
+   * @private
+   */
+  this.interval_ = opt_interval || 1;
+
+  /**
+   * An object that implements setTimeout, setInterval, clearTimeout and
+   * clearInterval. We default to the window object. Changing this on
+   * goog.Timer.prototype changes the object for all timer instances which can
+   * be useful if your environment has some other implementation of timers than
+   * the window object.
+   * @type {Object}
+   * @private
+   */
+  this.timerObject_ = opt_timerObject || goog.Timer.defaultTimerObject;
+
+  /**
+   * Cached tick_ bound to the object for later use in the timer.
+   * @type {Function}
+   * @private
+   */
+  this.boundTick_ = goog.bind(this.tick_, this);
+
+  /**
+   * Firefox browser often fires the timer event sooner
+   * (sometimes MUCH sooner) than the requested timeout. So we
+   * compare the time to when the event was last fired, and
+   * reschedule if appropriate. See also goog.Timer.intervalScale
+   * @type {number}
+   * @private
+   */
+  this.last_ = goog.now();
+};
+goog.inherits(goog.Timer, goog.events.EventTarget);
+
+
+/**
+ * Maximum timeout value.
+ *
+ * Timeout values too big to fit into a signed 32-bit integer may cause
+ * overflow in FF, Safari, and Chrome, resulting in the timeout being
+ * scheduled immediately.  It makes more sense simply not to schedule these
+ * timeouts, since 24.8 days is beyond a reasonable expectation for the
+ * browser to stay open.
+ *
+ * @type {number}
+ * @private
+ */
+goog.Timer.MAX_TIMEOUT_ = 2147483647;
+
+
+/**
+ * Whether this timer is enabled
+ * @type {boolean}
+ */
+goog.Timer.prototype.enabled = false;
+
+
+/**
+ * An object that implements setTimout, setInterval, clearTimeout and
+ * clearInterval. We default to the global object. Changing
+ * goog.Timer.defaultTimerObject changes the object for all timer instances
+ * which can be useful if your environment has some other implementation of
+ * timers you'd like to use.
+ * @type {Object}
+ */
+goog.Timer.defaultTimerObject = goog.global;
+
+
+/**
+ * A variable that controls the timer error correction. If the
+ * timer is called before the requested interval times
+ * intervalScale, which often happens on mozilla, the timer is
+ * rescheduled. See also this.last_
+ * @type {number}
+ */
+goog.Timer.intervalScale = 0.8;
+
+
+/**
+ * Variable for storing the result of setInterval
+ * @type {?number}
+ * @private
+ */
+goog.Timer.prototype.timer_ = null;
+
+
+/**
+ * Gets the interval of the timer.
+ * @return {number} interval Number of ms between ticks.
+ */
+goog.Timer.prototype.getInterval = function() {
+  return this.interval_;
+};
+
+
+/**
+ * Sets the interval of the timer.
+ * @param {number} interval Number of ms between ticks.
+ */
+goog.Timer.prototype.setInterval = function(interval) {
+  this.interval_ = interval;
+  if (this.timer_ && this.enabled) {
+    // Stop and then start the timer to reset the interval.
+    this.stop();
+    this.start();
+  } else if (this.timer_) {
+    this.stop();
+  }
+};
+
+
+/**
+ * Callback for the setTimeout used by the timer
+ * @private
+ */
+goog.Timer.prototype.tick_ = function() {
+  if (this.enabled) {
+    var elapsed = goog.now() - this.last_;
+    if (elapsed > 0 &&
+        elapsed < this.interval_ * goog.Timer.intervalScale) {
+      this.timer_ = this.timerObject_.setTimeout(this.boundTick_,
+          this.interval_ - elapsed);
+      return;
+    }
+
+    // Prevents setInterval from registering a duplicate timeout when called
+    // in the timer event handler.
+    if (this.timer_) {
+      this.timerObject_.clearTimeout(this.timer_);
+      this.timer_ = null;
+    }
+
+    this.dispatchTick();
+    // The timer could be stopped in the timer event handler.
+    if (this.enabled) {
+      this.timer_ = this.timerObject_.setTimeout(this.boundTick_,
+          this.interval_);
+      this.last_ = goog.now();
+    }
+  }
+};
+
+
+/**
+ * Dispatches the TICK event. This is its own method so subclasses can override.
+ */
+goog.Timer.prototype.dispatchTick = function() {
+  this.dispatchEvent(goog.Timer.TICK);
+};
+
+
+/**
+ * Starts the timer.
+ */
+goog.Timer.prototype.start = function() {
+  this.enabled = true;
+
+  // If there is no interval already registered, start it now
+  if (!this.timer_) {
+    // IMPORTANT!
+    // window.setInterval in FireFox has a bug - it fires based on
+    // absolute time, rather than on relative time. What this means
+    // is that if a computer is sleeping/hibernating for 24 hours
+    // and the timer interval was configured to fire every 1000ms,
+    // then after the PC wakes up the timer will fire, in rapid
+    // succession, 3600*24 times.
+    // This bug is described here and is already fixed, but it will
+    // take time to propagate, so for now I am switching this over
+    // to setTimeout logic.
+    //     https://bugzilla.mozilla.org/show_bug.cgi?id=376643
+    //
+    this.timer_ = this.timerObject_.setTimeout(this.boundTick_,
+        this.interval_);
+    this.last_ = goog.now();
+  }
+};
+
+
+/**
+ * Stops the timer.
+ */
+goog.Timer.prototype.stop = function() {
+  this.enabled = false;
+  if (this.timer_) {
+    this.timerObject_.clearTimeout(this.timer_);
+    this.timer_ = null;
+  }
+};
+
+
+/** @override */
+goog.Timer.prototype.disposeInternal = function() {
+  goog.Timer.superClass_.disposeInternal.call(this);
+  this.stop();
+  delete this.timerObject_;
+};
+
+
+/**
+ * Constant for the timer's event type
+ * @type {string}
+ */
+goog.Timer.TICK = 'tick';
+
+
+/**
+ * Calls the given function once, after the optional pause.
+ *
+ * The function is always called asynchronously, even if the delay is 0. This
+ * is a common trick to schedule a function to run after a batch of browser
+ * event processing.
+ *
+ * @param {function(this:SCOPE)|{handleEvent:function()}|null} listener Function
+ *     or object that has a handleEvent method.
+ * @param {number=} opt_delay Milliseconds to wait; default is 0.
+ * @param {SCOPE=} opt_handler Object in whose scope to call the listener.
+ * @return {number} A handle to the timer ID.
+ * @template SCOPE
+ */
+goog.Timer.callOnce = function(listener, opt_delay, opt_handler) {
+  if (goog.isFunction(listener)) {
+    if (opt_handler) {
+      listener = goog.bind(listener, opt_handler);
+    }
+  } else if (listener && typeof listener.handleEvent == 'function') {
+    // using typeof to prevent strict js warning
+    listener = goog.bind(listener.handleEvent, listener);
+  } else {
+    throw Error('Invalid listener argument');
+  }
+
+  if (opt_delay > goog.Timer.MAX_TIMEOUT_) {
+    // Timeouts greater than MAX_INT return immediately due to integer
+    // overflow in many browsers.  Since MAX_INT is 24.8 days, just don't
+    // schedule anything at all.
+    return -1;
+  } else {
+    return goog.Timer.defaultTimerObject.setTimeout(
+        listener, opt_delay || 0);
+  }
+};
+
+
+/**
+ * Clears a timeout initiated by callOnce
+ * @param {?number} timerId a timer ID.
+ */
+goog.Timer.clear = function(timerId) {
+  goog.Timer.defaultTimerObject.clearTimeout(timerId);
+};