'use strict';

/* --------------------------------------------------------------
 input_counter.js 2016-08-25
 Gambio GmbH
 http://www.gambio.de
 Copyright (c) 2016 Gambio GmbH
 Released under the GNU General Public License (Version 2)
 [http://www.gnu.org/licenses/gpl-2.0.html]
 --------------------------------------------------------------
 */

/**
 * ## Input Counter Widget
 *
 * Adds a counter element to input and textarea elements.
 *
 * ### Options:
 *
 * **Persistence | `data-input_counter-persistent` | bool | Optional**
 *
 * Omits to hide the counter element. This option is optional and the default value is true, so
 * the counter element is permanent displayed.
 *
 * **Pull | `data-input_counter-persistent` | bool/string | Optional**
 *
 * The option gives the possibility to pull the counter element to whether the right or left side.
 *
 * ### Example
 * ```html
 * <!-- Default input counter element -->
 * <input type="text" data-gx-widget="input_counter">
 * <textarea data-gx-widget="input_counter"></textarea>
 *
 * <!-- Show element on focus and hide on blur -->
 * <input type="text" data-input_counter-persistent="false">
 *
 * <!-- Disable counter pull -->
 * <input type="text" data-input_counter-pull="false">
 *
 * <!-- Pull counter to left side -->
 * <input type="text" data-input_counter-pull="left">
 * ```
 *
 * @module Admin/Widgets/input_counter
 */

gx.widgets.module('input_counter', [], function (data) {
    'use strict';

    // ------------------------------------------------------------------------
    // VARIABLE DEFINITION
    // ------------------------------------------------------------------------

    var
    /**
     * Widget Reference
     *
     * @type {object}
     */
    $this = $(this),


    /**
     * Default Widget Options
     *
     * @type {object}
     */
    defaults = {
        persistent: true,
        pull: 'right',
        label: false
    },


    /**
     * Final Widget Options
     *
     * @type {object}
     */
    options = $.extend(true, {}, defaults, data),


    /**
     * Module Object
     *
     * @type {object}
     */
    module = {},
        counterLabel = jse.core.lang.translate('COUNTER', 'admin_general'),
        $counter = $('<span/>');

    var _showCharCounter = function _showCharCounter(event) {
        $this.parent().append($counter);
        if (options.max) {
            $counter.text($this.val().length + '/' + options.max);
            options.label ? $counter.append(' - ' + counterLabel) : '';
        } else {
            $counter.text($this.val().length);
            options.label ? $counter.append(' - ' + counterLabel) : '';
        }
    };

    // ------------------------------------------------------------------------
    // INITIALIZATION
    // ------------------------------------------------------------------------

    /**
     * Initialize method of the widget, called by the engine.
     */
    module.init = function (done) {
        // check and set handling of persistent pull
        if (options.pull) {
            $counter.addClass('pull-' + options.pull);
        }

        // check and set handling of persistent option
        if (options.persistent) {
            _showCharCounter();
        } else {
            $this.focus(_showCharCounter);
            $this.blur(function () {
                $counter.remove();
            });
        }

        $this.on('keyup', _showCharCounter);
        done();
    };

    return module;
});
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