/*
 * Jeditable - jQuery in place edit plugin
 *
 * Copyright (c) 2006-2008 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
 *
 * Revision: $Id: jquery.jeditable.js 401 2008-07-21 15:01:00Z tuupola $
 *
 */

/**
  * Version 1.6.0
  *
  * @name  Jeditable
  * @type  jQuery
  * @param String  target             POST URL or function name to send edited content
  * @param Hash    options            additional options 
  * @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
  * @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 Hash    options[loaddata]  Extra parameters to pass when fetching content before editing.
  * @param String  options[data]      Or content given as paramameter.
  * @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[onblur]    'cancel', 'submit', 'ignore' or function
  * @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.
  *             
  */

(function($) {

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

		var settings = {
			target     : target,
			name       : 'value',
			id         : 'id',
			type       : 'text',
			width      : 'auto',
			height     : 'auto',
			event      : 'click',
			onblur     : 'cancel',
			loadtype   : 'GET',
			loadtext   : 'Loading...',
			placeholder: 'Click to edit',
			loaddata   : {},
			submitdata : {}
		};

		if(options) {
			$.extend(settings, 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() { };

		/* add custom event if it does not exist */
		if  (!$.isFunction($(this)[settings.event])) {
			$.fn[settings.event] = function(fn){
				return fn ? this.bind(settings.event, fn) : this.trigger(settings.event);
			}
		}

		/* TODO: remove this when form is displayed */
		$(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();

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

			$(this)[settings.event](function(e) {

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

				/* 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(/;/, '') == 
					settings.placeholder.toLowerCase().replace(/;/, '')) {
						$(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) {
						//t = setTimeout(self.reset, 500);
						t = setTimeout(function() {
							reset.apply(form, [settings, self]);
						}, 500);
					});
				} else if ('submit' == settings.onblur) {
					input.blur(function(e) {
						form.submit();
					});
				} 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 !== 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);
						  }          

						  /* show the saving indicator */
						  $(self).html(settings.indicator);
						  $.post(settings.target, submitdata, function(str) {
							  $(self).html(str);
							  self.editing = false;
							  callback.apply(self, [self.innerHTML, settings]);
							  /* TODO: this is not dry */                              
							  if (!$.trim($(self).html())) {
								  $(self).html(settings.placeholder);
							  }
						  });
					  }

					}

					return false;
				});
			});

			/* privileged methods */
			this.reset = function() {
				$(self).html(self.revert);
				self.editing   = false;
				if (!$.trim($(self).html())) {
					$(self).html(settings.placeholder);
				}
			}            
		});

	};


	$.editable = {
		types: {
			defaults: {
				element : function(settings, original) {
					var input = $('<input type="hidden">');                
					$(this).append(input);
					return(input);
				},
				content : function(string, settings, original) {
					$(':input:first', this).val(string);
				},
				reset : function(settings, original) {
				  original.reset();
				},
				buttons : function(settings, original) {
					var form = this;
					if (settings.submit) {
						/* if given html string use that */
						if (settings.submit.match(/>$/)) {
							var submit = $(settings.submit).click(function() {
								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 {
						textarea.height(settings.height);
					}
					if (settings.cols) {
						textarea.attr('cols', settings.cols);
					} else {
						textarea.width(settings.width);
					}
					$(this).append(textarea);
					return(textarea);
				}
			},
			select: {
				element : function(settings, original) {
					var select = $('<select>');
					$(this).append(select);
					return(select);
				},
				content : function(string, settings, original) {
					if (String == string.constructor) { 	 
						eval ('var json = ' + string);
						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() == original.revert) {
								$(this).attr('selected', 'selected');
						};
					});
				}
			}
		},

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

})(jQuery);