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/**
Bootstrap wysihtml5 editor. Based on [bootstrap-wysihtml5](https://github.com/jhollingworth/bootstrap-wysihtml5).  
You should include **manually** distributives of `wysihtml5` and `bootstrap-wysihtml5`:

    <link href="js/inputs-ext/wysihtml5/bootstrap-wysihtml5-0.0.2/bootstrap-wysihtml5-0.0.2.css" rel="stylesheet" type="text/css"></link>  
    <script src="js/inputs-ext/wysihtml5/bootstrap-wysihtml5-0.0.2/wysihtml5-0.3.0.min.js"></script>  
    <script src="js/inputs-ext/wysihtml5/bootstrap-wysihtml5-0.0.2/bootstrap-wysihtml5-0.0.2.min.js"></script>
    
And also include `wysihtml5.js` from `inputs-ext` directory of x-editable:
      
    <script src="js/inputs-ext/wysihtml5/wysihtml5.js"></script>  

**Note:** It's better to use fresh bootstrap-wysihtml5 from it's [master branch](https://github.com/jhollingworth/bootstrap-wysihtml5/tree/master/src) as there is update for correct image insertion.    
    
@class wysihtml5
@extends abstractinput
@final
@since 1.4.0
@example
<div id="comments" data-type="wysihtml5" data-pk="1"><h2>awesome</h2> comment!</div>
<script>
$(function(){
    $('#comments').editable({
        url: '/post',
        title: 'Enter comments'
    });
});
</script>
**/
(function ($) {
    "use strict";
    
    var Wysihtml5 = function (options) {
        this.init('wysihtml5', options, Wysihtml5.defaults);
        
        //extend wysihtml5 manually as $.extend not recursive 
        this.options.wysihtml5 = $.extend({}, Wysihtml5.defaults.wysihtml5, options.wysihtml5);
    };

    $.fn.editableutils.inherit(Wysihtml5, $.fn.editabletypes.abstractinput);

    $.extend(Wysihtml5.prototype, {
        render: function () {
            var deferred = $.Deferred(),
            msieOld;
            
            //generate unique id as it required for wysihtml5
            this.$input.attr('id', 'textarea_'+(new Date()).getTime());

            this.setClass();
            this.setAttr('placeholder');            
            
            //resolve deffered when widget loaded
            $.extend(this.options.wysihtml5, {
                events: {
                  load: function() {
                      deferred.resolve();
                  }  
                }
            });
            
            this.$input.wysihtml5(this.options.wysihtml5);
            
            /*
             In IE8 wysihtml5 iframe stays on the same line with buttons toolbar (inside popover).
             The only solution I found is to add <br>. If you fine better way, please send PR.   
            */
            msieOld = /msie\s*(8|7|6)/.test(navigator.userAgent.toLowerCase());
            if(msieOld) {
                this.$input.before('<br><br>'); 
            }
            
            return deferred.promise();
        },
       
        value2html: function(value, element) {
            $(element).html(value);
        },

        html2value: function(html) {
            return html;
        },
        
        value2input: function(value) {
            this.$input.data("wysihtml5").editor.setValue(value, true);
        }, 

        activate: function() {
            this.$input.data("wysihtml5").editor.focus();
        },
        
        isEmpty: function($element) {
            if($.trim($element.html()) === '') { 
                return true;
            } else if($.trim($element.text()) !== '') {
                return false;
            } else {
                //e.g. '<img>', '<br>', '<p></p>'
                return !$element.height() || !$element.width();
            } 
        }
    });

    Wysihtml5.defaults = $.extend({}, $.fn.editabletypes.abstractinput.defaults, {
        /**
        @property tpl
        @default <textarea></textarea>
        **/
        tpl:'<textarea></textarea>',
        /**
        @property inputclass
        @default editable-wysihtml5
        **/
        inputclass: 'editable-wysihtml5',
        /**
        Placeholder attribute of input. Shown when input is empty.

        @property placeholder
        @type string
        @default null
        **/
        placeholder: null,
        /**
        Wysihtml5 default options.  
        See https://github.com/jhollingworth/bootstrap-wysihtml5#options

        @property wysihtml5
        @type object
        @default {stylesheets: false}
        **/        
        wysihtml5: {
            stylesheets: false //see https://github.com/jhollingworth/bootstrap-wysihtml5/issues/183
        }
    });

    $.fn.editabletypes.wysihtml5 = Wysihtml5;

}(window.jQuery));