Add third_party/google-input-tools: Take 2

third_party/google_input_tools/src/chrome/os/inputview/covariance.js

+// Copyright 2014 The ChromeOS IME Authors. All Rights Reserved.
+// limitations under the License.
+// See the License for the specific language governing permissions and
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// Unless required by applicable law or agreed to in writing, software
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// You may obtain a copy of the License at
+// you may not use this file except in compliance with the License.
+// Licensed under the Apache License, Version 2.0 (the "License");
+//
+goog.provide('i18n.input.chrome.inputview.Covariance');
+
+goog.require('i18n.input.chrome.inputview.elements.ElementType');
+
+
+goog.scope(function() {
+var ElementType = i18n.input.chrome.inputview.elements.ElementType;
+
+
+
+/**
+ * The covariance used for gaussian model.
+ *
+ * @constructor
+ */
+i18n.input.chrome.inputview.Covariance = function() {
+  /** @private {number} */
+  this.breakDown_ = 0;
+};
+var Covariance = i18n.input.chrome.inputview.Covariance;
+
+
+/**
+ * The break-down for covariance.
+ *
+ * @enum {number}
+ */
+Covariance.BreakDown = {
+  A11Y: 1,
+  HORIZONTAL: 2,
+  WIDE_SCREEN: 4
+};
+
+
+/**
+ * The key type.
+ *
+ * @type {!Object.<ElementType, number>}
+ */
+Covariance.ElementTypeMap = goog.object.create(
+    ElementType.CHARACTER_KEY, 0,
+    ElementType.COMPACT_KEY, 1
+);
+
+
+/**
+ * The value.
+ * Key: the break down value.
+ * Value: A list - first is the covariance for full keyboard, second is for
+ * compact.
+ *
+ * @private {!Object.<!Array.<number>>}
+ */
+Covariance.VALUE_ = {
+  0: [120, 160],
+  1: [130, 0],
+  2: [235, 342],
+  3: [162, 0],
+  4: [160, 213],
+  5: [142, 0],
+  6: [230, 332],
+  7: [162, 0]
+};
+
+
+/**
+ * Updates the covariance.
+ *
+ * @param {boolean} isWideScreen .
+ * @param {boolean} isHorizontal .
+ * @param {boolean} isA11y .
+ */
+Covariance.prototype.update = function(isWideScreen, isHorizontal, isA11y) {
+  this.breakDown_ = 0;
+  if (isWideScreen) {
+    this.breakDown_ |= Covariance.BreakDown.WIDE_SCREEN;
+  }
+  if (isHorizontal) {
+    this.breakDown_ |= Covariance.BreakDown.HORIZONTAL;
+  }
+  if (isA11y) {
+    this.breakDown_ |= Covariance.BreakDown.A11Y;
+  }
+};
+
+
+/**
+ * Gets the covariance value.
+ *
+ * @param {ElementType} type .
+ */
+Covariance.prototype.getValue = function(type) {
+  var index = Covariance.ElementTypeMap[type];
+  return Covariance.VALUE_[this.breakDown_][index];
+};
+
+}); // goog.scope
+