element-web/src/components/structures/SearchBox.js

/*
Copyright 2015, 2016 OpenMarket Ltd

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

'use strict';

import React from 'react';
import { _t } from '../../languageHandler';
import { KeyCode } from '../../Keyboard';
import sdk from '../../index';
import dis from '../../dispatcher';
import { throttle } from 'lodash';
import AccessibleButton from '../../components/views/elements/AccessibleButton';

module.exports = React.createClass({
    displayName: 'SearchBox',

    propTypes: {
        onSearch: React.PropTypes.func,
        onCleared: React.PropTypes.func,
    },

    getInitialState: function() {
        return {
            searchTerm: "",
        };
    },

    componentDidMount: function() {
        this.dispatcherRef = dis.register(this.onAction);
    },

    componentWillUnmount: function() {
        dis.unregister(this.dispatcherRef);
    },

    onAction: function(payload) {
        switch (payload.action) {
            case 'view_room':
                if (this.refs.search && payload.clear_search) {
                    this._clearSearch();
                }
                break;
            case 'focus_room_filter':
                if (this.refs.search) {
                    this.refs.search.focus();
                }
                break;
        }
    },

    onChange: function() {
        if (!this.refs.search) return;
        this.setState({ searchTerm: this.refs.search.value });
        this.onSearch();
    },

    onSearch: throttle(function() {
        this.props.onSearch(this.refs.search.value);
    }, 200, {trailing: true, leading: true}),

    _onKeyDown: function(ev) {
        switch (ev.keyCode) {
            case KeyCode.ESCAPE:
                this._clearSearch("keyboard");
                break;
        }
    },

    _onFocus: function(ev) {
        ev.target.select();
    },

    _clearSearch: function(source) {
        this.refs.search.value = "";
        this.onChange();
        if (this.props.onCleared) {
            this.props.onCleared(source);
        }
    },

    render: function() {
        // check for collapsed here and
        // not at parent so we keep
        // searchTerm in our state
        // when collapsing and expanding
        if (this.props.collapsed) {
            return null;
        }
        const clearButton = this.state.searchTerm.length > 0 ?
            (<AccessibleButton key="button"
                    className="mx_SearchBox_closeButton"
                    onClick={ () => {this._clearSearch("button")} }>
            </AccessibleButton>) :  undefined;

        return (
            <div className="mx_SearchBox mx_textinput">
                <input
                    key="searchfield"
                    type="text"
                    ref="search"
                    className="mx_textinput_icon mx_textinput_search"
                    value={ this.state.searchTerm }
                    onFocus={ this._onFocus }
                    onChange={ this.onChange }
                    onKeyDown={ this._onKeyDown }
                    placeholder={ _t('Filter room names') }
                />
                { clearButton }
            </div>
        );
    },
});