/*

* Jeditable - jQuery in place edit plugin
*
* Copyright (c) 2006-2009 Mika Tuupola, Dylan Verheul
*
* Licensed under the MIT license:
*   http://www.opensource.org/licenses/mit-license.php
*
* Project home:
*   http://www.appelsiini.net/projects/jeditable
*
* Based on editable by Dylan Verheul <dylan_at_dyve.net>:
*    http://www.dyve.net/jquery/?editable
*
*/

/**

* Version 1.7.1
*
* ** means there is basic unit tests for this parameter. 
*
* @name  Jeditable
* @type  jQuery
* @param String  target             (POST) URL or function to send edited content to **
* @param Hash    options            additional options 
* @param String  options[method]    method to use to send edited content (POST or PUT) **
* @param Function options[callback] Function to run after submitting edited content **
* @param String  options[name]      POST parameter name of edited content
* @param String  options[id]        POST parameter name of edited div id
* @param Hash    options[submitdata] Extra parameters to send when submitting edited content.
* @param String  options[type]      text, textarea or select (or any 3rd party input type) **
* @param Integer options[rows]      number of rows if using textarea ** 
* @param Integer options[cols]      number of columns if using textarea **
* @param Mixed   options[height]    'auto', 'none' or height in pixels **
* @param Mixed   options[width]     'auto', 'none' or width in pixels **
* @param String  options[loadurl]   URL to fetch input content before editing **
* @param String  options[loadtype]  Request type for load url. Should be GET or POST.
* @param String  options[loadtext]  Text to display while loading external content.
* @param Mixed   options[loaddata]  Extra parameters to pass when fetching content before editing.
* @param Mixed   options[data]      Or content given as paramameter. String or function.**
* @param String  options[indicator] indicator html to show when saving
* @param String  options[tooltip]   optional tooltip text via title attribute **
* @param String  options[event]     jQuery event such as 'click' of 'dblclick' **
* @param String  options[submit]    submit button value, empty means no button **
* @param String  options[cancel]    cancel button value, empty means no button **
* @param String  options[cssclass]  CSS class to apply to input form. 'inherit' to copy from parent. **
* @param String  options[style]     Style to apply to input form 'inherit' to copy from parent. **
* @param String  options[select]    true or false, when true text is highlighted ??
* @param String  options[placeholder] Placeholder text or html to insert when element is empty. **
* @param String  options[onblur]    'cancel', 'submit', 'ignore' or function ??
*             
* @param Function options[onsubmit] function(settings, original) { ... } called before submit
* @param Function options[onreset]  function(settings, original) { ... } called before reset
* @param Function options[onerror]  function(settings, original, xhr) { ... } called on error
*             
* @param Hash    options[ajaxoptions]  jQuery Ajax options. See docs.jquery.com.
*             
*/

(function($) {

$.fn.editable = function(target, options) {

    if ('disable' == target) {
        $(this).data('disabled.editable', true);
        return;
    }
    if ('enable' == target) {
        $(this).data('disabled.editable', false);
        return;
    }
    if ('destroy' == target) {
        $(this)
            .unbind($(this).data('event.editable'))
            .removeData('disabled.editable')
            .removeData('event.editable');
        return;
    }

    var settings = $.extend({}, $.fn.editable.defaults, {target:target}, options);

    /* setup some functions */
    var plugin   = $.editable.types[settings.type].plugin || function() { };
    var submit   = $.editable.types[settings.type].submit || function() { };
    var buttons  = $.editable.types[settings.type].buttons 
                || $.editable.types['defaults'].buttons;
    var content  = $.editable.types[settings.type].content 
                || $.editable.types['defaults'].content;
    var element  = $.editable.types[settings.type].element 
                || $.editable.types['defaults'].element;
    var reset    = $.editable.types[settings.type].reset 
                || $.editable.types['defaults'].reset;
    var callback = settings.callback || function() { };
    var onedit   = settings.onedit   || function() { }; 
    var onsubmit = settings.onsubmit || function() { };
    var onreset  = settings.onreset  || function() { };
    var onerror  = settings.onerror  || reset;

    /* show tooltip */
    if (settings.tooltip) {
        $(this).attr('title', settings.tooltip);
    }

    settings.autowidth  = 'auto' == settings.width;
    settings.autoheight = 'auto' == settings.height;

    return this.each(function() {

        /* save this to self because this changes when scope changes */
        var self = this;  

        /* inlined block elements lose their width and height after first edit */
        /* save them for later use as workaround */
        var savedwidth  = $(self).width();
        var savedheight = $(self).height();

        /* save so it can be later used by $.editable('destroy') */
        $(this).data('event.editable', settings.event);

        /* if element is empty add something clickable (if requested) */
        if (!$.trim($(this).html())) {
            $(this).html(settings.placeholder);
        }

        $(this).bind(settings.event, function(e) {

            /* abort if disabled for this element */
            if (true === $(this).data('disabled.editable')) {
                return;
            }

            /* prevent throwing an exeption if edit field is clicked again */
            if (self.editing) {
                return;
            }

            /* abort if onedit hook returns false */
            if (false === onedit.apply(this, [settings, self])) {
               return;
            }

            /* prevent default action and bubbling */
            e.preventDefault();
            e.stopPropagation();

            /* remove tooltip */
            if (settings.tooltip) {
                $(self).removeAttr('title');
            }

            /* figure out how wide and tall we are, saved width and height */
            /* are workaround for http://dev.jquery.com/ticket/2190 */
            if (0 == $(self).width()) {
                //$(self).css('visibility', 'hidden');
                settings.width  = savedwidth;
                settings.height = savedheight;
            } else {
                if (settings.width != 'none') {
                    settings.width = 
                        settings.autowidth ? $(self).width()  : settings.width;
                }
                if (settings.height != 'none') {
                    settings.height = 
                        settings.autoheight ? $(self).height() : settings.height;
                }
            }
            //$(this).css('visibility', '');

            /* remove placeholder text, replace is here because of IE */
            if ($(this).html().toLowerCase().replace(/(;|")/g, '') == 
                settings.placeholder.toLowerCase().replace(/(;|")/g, '')) {
                    $(this).html('');
            }

            self.editing    = true;
            self.revert     = $(self).html();
            $(self).html('');

            /* create the form object */
            var form = $('<form />');

            /* apply css or style or both */
            if (settings.cssclass) {
                if ('inherit' == settings.cssclass) {
                    form.attr('class', $(self).attr('class'));
                } else {
                    form.attr('class', settings.cssclass);
                }
            }

            if (settings.style) {
                if ('inherit' == settings.style) {
                    form.attr('style', $(self).attr('style'));
                    /* IE needs the second line or display wont be inherited */
                    form.css('display', $(self).css('display'));                
                } else {
                    form.attr('style', settings.style);
                }
            }

            /* add main input element to form and store it in input */
            var input = element.apply(form, [settings, self]);

            /* set input content via POST, GET, given data or existing value */
            var input_content;

            if (settings.loadurl) {
                var t = setTimeout(function() {
                    input.disabled = true;
                    content.apply(form, [settings.loadtext, settings, self]);
                }, 100);

                var loaddata = {};
                loaddata[settings.id] = self.id;
                if ($.isFunction(settings.loaddata)) {
                    $.extend(loaddata, settings.loaddata.apply(self, [self.revert, settings]));
                } else {
                    $.extend(loaddata, settings.loaddata);
                }
                $.ajax({
                   type : settings.loadtype,
                   url  : settings.loadurl,
                   data : loaddata,
                   async : false,
                   success: function(result) {
                      window.clearTimeout(t);
                      input_content = result;
                      input.disabled = false;
                   }
                });
            } else if (settings.data) {
                input_content = settings.data;
                if ($.isFunction(settings.data)) {
                    input_content = settings.data.apply(self, [self.revert, settings]);
                }
            } else {
                input_content = self.revert; 
            }
            content.apply(form, [input_content, settings, self]);

            input.attr('name', settings.name);

            /* add buttons to the form */
            buttons.apply(form, [settings, self]);

            /* add created form to self */
            $(self).append(form);

            /* attach 3rd party plugin if requested */
            plugin.apply(form, [settings, self]);

            /* focus to first visible form element */
            $(':input:visible:enabled:first', form).focus();

            /* highlight input contents when requested */
            if (settings.select) {
                input.select();
            }

            /* discard changes if pressing esc */
            input.keydown(function(e) {
                if (e.keyCode == 27) {
                    e.preventDefault();
                    //self.reset();
                    reset.apply(form, [settings, self]);
                }
            });

            /* discard, submit or nothing with changes when clicking outside */
            /* do nothing is usable when navigating with tab */
            var t;
            if ('cancel' == settings.onblur) {
                input.blur(function(e) {
                    /* prevent canceling if submit was clicked */
                    t = setTimeout(function() {
                        reset.apply(form, [settings, self]);
                    }, 500);
                });
            } else if ('submit' == settings.onblur) {
                input.blur(function(e) {
                    /* prevent double submit if submit was clicked */
                    t = setTimeout(function() {
                        form.submit();
                    }, 200);
                });
            } else if ($.isFunction(settings.onblur)) {
                input.blur(function(e) {
                    settings.onblur.apply(self, [input.val(), settings]);
                });
            } else {
                input.blur(function(e) {
                  /* TODO: maybe something here */
                });
            }

            form.submit(function(e) {

                if (t) { 
                    clearTimeout(t);
                }

                /* do no submit */
                e.preventDefault(); 

                /* call before submit hook. */
                /* if it returns false abort submitting */                    
                if (false !== onsubmit.apply(form, [settings, self])) { 
                    /* custom inputs call before submit hook. */
                    /* if it returns false abort submitting */
                    if (false !== submit.apply(form, [settings, self])) { 

                      /* check if given target is function */
                      if ($.isFunction(settings.target)) {
                          var str = settings.target.apply(self, [input.val(), settings]);
                          $(self).html(str);
                          self.editing = false;
                          callback.apply(self, [self.innerHTML, settings]);
                          /* TODO: this is not dry */                              
                          if (!$.trim($(self).html())) {
                              $(self).html(settings.placeholder);
                          }
                      } else {
                          /* add edited content and id of edited element to POST */
                          var submitdata = {};
                          submitdata[settings.name] = input.val();
                          submitdata[settings.id] = self.id;
                          /* add extra data to be POST:ed */
                          if ($.isFunction(settings.submitdata)) {
                              $.extend(submitdata, settings.submitdata.apply(self, [self.revert, settings]));
                          } else {
                              $.extend(submitdata, settings.submitdata);
                          }

                          /* quick and dirty PUT support */
                          if ('PUT' == settings.method) {
                              submitdata['_method'] = 'put';
                          }

                          /* show the saving indicator */
                          $(self).html(settings.indicator);

                          /* defaults for ajaxoptions */
                          var ajaxoptions = {
                              type    : 'POST',
                              data    : submitdata,
                              dataType: 'html',
                              url     : settings.target,
                              success : function(result, status) {
                                  if (ajaxoptions.dataType == 'html') {
                                    $(self).html(result);
                                  }
                                  self.editing = false;
                                  callback.apply(self, [result, settings]);
                                  if (!$.trim($(self).html())) {
                                      $(self).html(settings.placeholder);
                                  }
                              },
                              error   : function(xhr, status, error) {
                                  onerror.apply(form, [settings, self, xhr]);
                              }
                          };

                          /* override with what is given in settings.ajaxoptions */
                          $.extend(ajaxoptions, settings.ajaxoptions);   
                          $.ajax(ajaxoptions);          

                        }
                    }
                }

                /* show tooltip again */
                $(self).attr('title', settings.tooltip);

                return false;
            });
        });

        /* privileged methods */
        this.reset = function(form) {
            /* prevent calling reset twice when blurring */
            if (this.editing) {
                /* before reset hook, if it returns false abort reseting */
                if (false !== onreset.apply(form, [settings, self])) { 
                    $(self).html(self.revert);
                    self.editing   = false;
                    if (!$.trim($(self).html())) {
                        $(self).html(settings.placeholder);
                    }
                    /* show tooltip again */
                    if (settings.tooltip) {
                        $(self).attr('title', settings.tooltip);                
                    }
                }                    
            }
        };            
    });

};

$.editable = {
    types: {
        defaults: {
            element : function(settings, original) {
                var input = $('<input type="hidden"></input>');                
                $(this).append(input);
                return(input);
            },
            content : function(string, settings, original) {
                $(':input:first', this).val(string);
            },
            reset : function(settings, original) {
              original.reset(this);
            },
            buttons : function(settings, original) {
                var form = this;
                if (settings.submit) {
                    /* if given html string use that */
                    if (settings.submit.match(/>$/)) {
                        var submit = $(settings.submit).click(function() {
                            if (submit.attr("type") != "submit") {
                                form.submit();
                            }
                        });
                    /* otherwise use button with given string as text */
                    } else {
                        var submit = $('<button type="submit" />');
                        submit.html(settings.submit);                            
                    }
                    $(this).append(submit);
                }
                if (settings.cancel) {
                    /* if given html string use that */
                    if (settings.cancel.match(/>$/)) {
                        var cancel = $(settings.cancel);
                    /* otherwise use button with given string as text */
                    } else {
                        var cancel = $('<button type="cancel" />');
                        cancel.html(settings.cancel);
                    }
                    $(this).append(cancel);

                    $(cancel).click(function(event) {
                        //original.reset();
                        if ($.isFunction($.editable.types[settings.type].reset)) {
                            var reset = $.editable.types[settings.type].reset;                                                                
                        } else {
                            var reset = $.editable.types['defaults'].reset;                                
                        }
                        reset.apply(form, [settings, original]);
                        return false;
                    });
                }
            }
        },
        text: {
            element : function(settings, original) {
                var input = $('<input />');
                if (settings.width  != 'none') { input.width(settings.width);  }
                if (settings.height != 'none') { input.height(settings.height); }
                /* https://bugzilla.mozilla.org/show_bug.cgi?id=236791 */
                //input[0].setAttribute('autocomplete','off');
                input.attr('autocomplete','off');
                $(this).append(input);
                return(input);
            }
        },
        textarea: {
            element : function(settings, original) {
                var textarea = $('<textarea />');
                if (settings.rows) {
                    textarea.attr('rows', settings.rows);
                } else if (settings.height != "none") {
                    textarea.height(settings.height);
                }
                if (settings.cols) {
                    textarea.attr('cols', settings.cols);
                } else if (settings.width != "none") {
                    textarea.width(settings.width);
                }
                $(this).append(textarea);
                return(textarea);
            }
        },
        select: {
           element : function(settings, original) {
                var select = $('<select />');
                $(this).append(select);
                return(select);
            },
            content : function(data, settings, original) {
                /* If it is string assume it is json. */
                if (String == data.constructor) {      
                    eval ('var json = ' + data);
                } else {
                /* Otherwise assume it is a hash already. */
                    var json = data;
                }
                for (var key in json) {
                    if (!json.hasOwnProperty(key)) {
                        continue;
                    }
                    if ('selected' == key) {
                        continue;
                    } 
                    var option = $('<option />').val(key).append(json[key]);
                    $('select', this).append(option);    
                }                    
                /* Loop option again to set selected. IE needed this... */ 
                $('select', this).children().each(function() {
                    if ($(this).val() == json['selected'] || 
                        $(this).text() == $.trim(original.revert)) {
                            $(this).attr('selected', 'selected');
                    }
                });
            }
        }
    },

    /* Add new input type */
    addInputType: function(name, input) {
        $.editable.types[name] = input;
    }
};

// publicly accessible defaults
$.fn.editable.defaults = {
    name       : 'value',
    id         : 'id',
    type       : 'text',
    width      : 'auto',
    height     : 'auto',
    event      : 'click.editable',
    onblur     : 'cancel',
    loadtype   : 'GET',
    loadtext   : 'Loading...',
    placeholder: 'Click to edit',
    loaddata   : {},
    submitdata : {},
    ajaxoptions: {}
};

})(jQuery);