mirror of
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e2ee3aa9c9
Moving closure compilation into the build file. Fixing up goog.requires for accessible blockly. Adding accessible to the build script.
62 lines
1.9 KiB
JavaScript
62 lines
1.9 KiB
JavaScript
/**
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* AccessibleBlockly
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*
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* Copyright 2016 Google Inc.
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* https://developers.google.com/blockly/
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*
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* Licensed under the Apache License, Version 2.0 (the 'License');
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an 'AS IS' BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @fileoverview Angular2 Service for updating the ARIA live region that
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* allows screenreaders to notify the user about actions that they have taken.
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* @author sll@google.com (Sean Lip)
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*/
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goog.provide('blocklyApp.NotificationsService');
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blocklyApp.NotificationsService = ng.core.Class({
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constructor: [function() {
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this.currentMessage = '';
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this.timeouts = [];
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}],
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setDisplayedMessage_: function(newMessage) {
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this.currentMessage = newMessage;
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},
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getDisplayedMessage: function() {
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return this.currentMessage;
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},
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speak: function(newMessage) {
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// Clear and reset any existing timeouts.
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this.timeouts.forEach(function(timeout) {
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clearTimeout(timeout);
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});
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this.timeouts.length = 0;
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// Clear the current message, so that if, e.g., two operations of the same
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// type are performed, both messages will be read in succession.
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this.setDisplayedMessage_('');
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// We need a non-zero timeout here, otherwise NVDA does not read the
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// notification messages properly.
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var that = this;
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this.timeouts.push(setTimeout(function() {
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that.setDisplayedMessage_(newMessage);
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}, 20));
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this.timeouts.push(setTimeout(function() {
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that.setDisplayedMessage_('');
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}, 5000));
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}
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});
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