| // Copyright 2016 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.FeatureTracker'); |
| |
| goog.require('i18n.input.chrome.FeatureName'); |
| |
| goog.scope(function() { |
| var FeatureName = i18n.input.chrome.FeatureName; |
| |
| |
| |
| /** |
| * Controller for experimental features. |
| * |
| * @constructor |
| */ |
| i18n.input.chrome.FeatureTracker = function() { |
| |
| /** |
| * Whether experimental flags is enabled. |
| * |
| * @private {Object.<string, boolean>} |
| */ |
| this.features_ = {}; |
| |
| /** |
| * Features that are enabled by default. Any feature not on this list is |
| * disabled unless the runtime --enable-inputview-{feature} flag is present. |
| * |
| * @const |
| * @private {!Array<FeatureName>} |
| */ |
| this.ENABLED_BY_DEFAULT_ = []; |
| |
| /** |
| * Whether the features list is ready. |
| * |
| * @private {boolean} |
| */ |
| this.ready_ = false; |
| }; |
| |
| var FeatureTracker = i18n.input.chrome.FeatureTracker; |
| |
| |
| /** |
| * Whether the feature is enabled. |
| * |
| * @param {!FeatureName} feature . |
| * @return {boolean} |
| */ |
| FeatureTracker.prototype.isEnabled = function(feature) { |
| if (!this.ready_) { |
| console.error('Features not present in config or not ready yet.'); |
| } |
| if (feature in this.features_) { |
| return this.features_[feature]; |
| } |
| return (this.ENABLED_BY_DEFAULT_.indexOf(feature) >= 0) || |
| !!this.features_[FeatureName.EXPERIMENTAL]; |
| }; |
| |
| |
| /** |
| * Inits the feature tracker. |
| * |
| * @param {!Object} config The keyboard config. |
| */ |
| FeatureTracker.prototype.initialize = function(config) { |
| if (config.features) { |
| var features = config.features; |
| // Parse the run time flags. |
| for (var i = 0; i < features.length; i++) { |
| var pieces = features[i].split('-'); |
| var state = pieces.pop(); |
| if (state == 'enabled') { |
| this.features_[pieces.join('-')] = true; |
| } else if (state == 'disabled') { |
| this.features_[pieces.join('-')] = false; |
| } else { |
| console.error('Unrecognized flag: ' + features[i]); |
| } |
| } |
| this.ready_ = true; |
| } else { |
| console.error('API Error. Features not present in config.'); |
| return; |
| } |
| }; |
| |
| }); // goog.scope |
| |