134 lines
4.2 KiB
JavaScript
134 lines
4.2 KiB
JavaScript
/*
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* Copyright (C) 2016 Glyptodon LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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* A service for accessing local clipboard data.
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*/
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angular.module('client').factory('clipboardService', ['$injector',
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function clipboardService($injector) {
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// Get required services
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var $q = $injector.get('$q');
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var $rootScope = $injector.get('$rootScope');
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var service = {};
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/**
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* A div which is used to hide the clipboard textarea and remove it from
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* document flow.
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*
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* @type Element
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*/
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var clipElement = document.createElement('div');
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/**
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* The textarea that will be used to hold the local clipboard contents.
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*
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* @type Element
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*/
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var clipboardContent = document.createElement('textarea');
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/**
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* The contents of the last clipboard event broadcast by this service when
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* the clipboard contents changed.
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*
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* @type String
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*/
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var lastClipboardEvent = '';
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clipElement.appendChild(clipboardContent);
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clipElement.style.position = 'absolute';
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clipElement.style.width = '0px';
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clipElement.style.height = '0px';
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clipElement.style.overflow = 'hidden';
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document.body.appendChild(clipElement);
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/**
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* Sets the local clipboard, if possible, to the given text.
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*
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* @param {String} text
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* The text to which the local clipboard should be set.
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*
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* @return {Promise}
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* A promise that will resolve if setting the clipboard was successful,
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* and will reject if it failed.
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*/
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service.setLocalClipboard = function setLocalClipboard(text) {
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var deferred = $q.defer();
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// Copy the given value into the clipboard DOM element
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clipboardContent.value = text;
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clipboardContent.select();
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// Attempt to copy data from clipboard element into local clipboard
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if (document.execCommand('copy'))
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deferred.resolve();
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else
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deferred.reject();
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return deferred.promise;
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};
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/**
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* Get the current value of the local clipboard.
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*
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* @return {Promise}
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* A promise that will resolve with the contents of the local clipboard
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* if getting the clipboard was successful, and will reject if it
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* failed.
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*/
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service.getLocalClipboard = function getLocalClipboard() {
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var deferred = $q.defer();
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// Clear and select the clipboard DOM element
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clipboardContent.value = '';
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clipboardContent.select();
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// Attempt paste local clipboard into clipboard DOM element
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if (document.execCommand('paste'))
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deferred.resolve(clipboardContent.value);
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else
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deferred.reject();
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return deferred.promise;
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};
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// Periodically attempt to read the clipboard, firing an event if successful
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window.setInterval(function periodicallyReadClipboard() {
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service.getLocalClipboard().then(function clipboardRead(data) {
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// Fire clipboard event if the data has changed
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if (data !== lastClipboardEvent) {
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$rootScope.$broadcast('guacClipboard', 'text/plain', data);
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lastClipboardEvent = data;
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}
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});
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}, 100);
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return service;
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}]);
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