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# File `src/ui/react/src/components/buttons/button-twitter.jsx`

                                (function () {
                                    'use strict';

                                    /**
                                     * The ButtonTwitter class provides functionality for creating a link which
                                     * allows people to tweet part of the content in the editor.
                                     *
                                     * @uses ButtonStateClasses
                                     *
                                     * @class ButtonTwitter
                                     */
                                    var ButtonTwitter = React.createClass({
                                        mixins: [AlloyEditor.ButtonStateClasses],

                                        // Allows validating props being passed to the component.
                                        propTypes: {
                                            /**
                                             * The editor instance where the component is being used.
                                             *
                                             * @property {Object} editor
                                             */
                                            editor: React.PropTypes.object.isRequired,

                                            /**
                                             * The label that should be used for accessibility purposes.
                                             *
                                             * @property {String} label
                                             */
                                            label: React.PropTypes.string,

                                            /**
                                             * The tabIndex of the button in its toolbar current state. A value other than -1
                                             * means that the button has focus and is the active element.
                                             *
                                             * @property {Number} tabIndex
                                             */
                                            tabIndex: React.PropTypes.number
                                        },

                                        // Lifecycle. Provides static properties to the widget.
                                        statics: {
                                            /**
                                             * The name which will be used as an alias of the button in the configuration.
                                             *
                                             * @static
                                             * @property {String} key
                                             * @default twitter
                                             */
                                            key: 'twitter'
                                        },

                                        /**
                                         * Creates or removes the twitter link on the selection.
                                         *
                                         * @method handleClick
                                         */
                                        handleClick: function() {
                                            var editor = this.props.editor.get('nativeEditor');

                                            var linkUtils = new CKEDITOR.Link(editor);

                                            if (this.isActive()) {
                                                linkUtils.remove(linkUtils.getFromSelection());
                                            } else {
                                                linkUtils.create(
                                                    this._getHref(),
                                                    {
                                                        'class': 'ae-twitter-link',
                                                        'target': '_blank'
                                                    }
                                                );
                                            }

                                            editor.fire('actionPerformed', this);
                                        },

                                        /**
                                         * Checks if the current selection is contained within a link that points to twitter.com/intent/tweet.
                                         *
                                         * @method isActive
                                         * @return {Boolean} True if the selection is inside a twitter link, false otherwise.
                                         */
                                        isActive: function() {
                                            var link = new CKEDITOR.Link(this.props.editor.get('nativeEditor')).getFromSelection();

                                            return (link && (link.getAttribute('href').indexOf('twitter.com/intent/tweet') !== -1));
                                        },

                                        /**
                                         * Lifecycle. Renders the UI of the button.
                                         *
                                         * @method render
                                         * @return {Object} The content which should be rendered.
                                         */
                                        render: function() {
                                            var cssClass = 'ae-button ' + this.getStateClasses();

                                            return (
                                                <button aria-label={AlloyEditor.Strings.twitter} className={cssClass} data-type="button-twitter" onClick={this.handleClick} tabIndex={this.props.tabIndex} title={AlloyEditor.Strings.twitter}>
                                                    <span className="ae-icon-twitter"></span>
                                                </button>
                                            );
                                        },

                                        /**
                                         * Generates the appropriate twitter url based on the selected text and the configuration
                                         * options received via props.
                                         *
                                         * @protected
                                         * @method _getHref
                                         * @return {String} A valid twitter url with the selected text and given configuration.
                                         */
                                        _getHref: function() {
                                            var nativeEditor = this.props.editor.get('nativeEditor');
                                            var selectedText = nativeEditor.getSelection().getSelectedText();
                                            var url = this.props.url;
                                            var via = this.props.via;
                                            var twitterHref = 'https://twitter.com/intent/tweet?text=' + selectedText;

                                            if (url) {
                                                twitterHref += '&url=' + url;
                                            }

                                            if (via) {
                                                twitterHref += '&via=' + via;
                                            }

                                            return twitterHref;
                                        }
                                    });

                                    AlloyEditor.Buttons[ButtonTwitter.key] = AlloyEditor.ButtonTwitter = ButtonTwitter;
                                }());