philo/static/philo/js/EmbedWidget.js

   1 ;(function ($) {
   2         var widget = window.embedWidget;
   3
   4         widget = {
   5                 options: {},
   6                 optgroups: {},
   7                 init: function () {
   8                         var EmbedFields = widget.EmbedFields = $('.embedding'),
   9                                 EmbedWidgets = widget.EmbedWidgets,
  10                                 EmbedBars = widget.EmbedBars,
  11                                 EmbedButtons = widget.EmbedButtons,
  12                                 EmbedSelects = widget.EmbedSelects;
  13
  14                         EmbedFields.wrap($('<div class="embed-widget" />'));
  15                         EmbedWidgets = $('.embed-widget');
  16                         EmbedWidgets.prepend($('<div class="embed-toolbar" />'));
  17                         EmbedBars = $('.embed-toolbar');
  18                         EmbedBars.append('<select class="embed-select"></select><button class="embed-button">Embed</button>');
  19                         EmbedButtons = $('.embed-button');
  20                         EmbedSelects = $('.embed-select');
  21
  22                         widget.parseContentTypes();
  23                         EmbedSelects.each(widget.populateSelect);
  24
  25                         EmbedButtons.click(widget.buttonHandler);
  26
  27                         // overload the dismissRelatedLookupPopup function
  28                         oldDismissRelatedLookupPopup = window.dismissRelatedLookupPopup;
  29                         window.dismissRelatedLookupPopup = function (win, chosenId) {
  30                                 var name = windowname_to_id(win.name),
  31                                         elem = $('#'+win.name), val;
  32                                 // if the original element was an embed widget, run our script
  33                                 if (elem.parent().hasClass('embed-widget')) {
  34                                         contenttype = $('select',elem.parent()).val();
  35                                         widget.appendEmbed(elem, contenttype, chosenId);
  36                                         elem.focus();
  37                                         win.close();
  38                                         return;
  39                                 }
  40                                 // otherwise, do what you usually do
  41                                 oldDismissRelatedLookupPopup.apply(this, arguments);
  42                         }
  43                 },
  44                 parseContentTypes: function () {
  45                         var string = widget.EmbedFields.eq(0).attr('data-content-types'),
  46                                 data = $.parseJSON(string),
  47                                 i=0,
  48                                 current_app_label = '',
  49                                 optgroups = {};
  50
  51                                 // this loop relies on data being clustered by app
  52                                 for(i=0; i < data.length; i++){
  53                                         item = data[i]
  54                                         // run this next loop every time we encounter a new app label
  55                                         if (item.app_label !== current_app_label) {
  56                                                 current_app_label = item.app_label;
  57                                                 optgroups[current_app_label] = {}
  58                                         }
  59                                         optgroups[current_app_label][item.verbose_name] = [item.app_label,item.object_name].join('.');
  60
  61                                         widget.optgroups = optgroups;
  62                                 }
  63                 },
  64                 populateSelect: function () {
  65                         var $this = $(this),
  66                                 optgroups = widget.optgroups,
  67                                 optgroup_els = {},
  68                                 optgroup_el, group;
  69
  70                         // append a title
  71                         $this.append('<option value="">Media Types</option>');
  72
  73                         // for each group
  74                         for (name in optgroups){
  75                                 if(optgroups.hasOwnProperty(name)){
  76                                         // assign the group to variable group, temporarily
  77                                         group = optgroups[name];
  78                                         // create an element for this group and assign it to optgroup_el, temporarily
  79                                         optgroup_el = optgroup_els[name] = $('<optgroup label="'+name+'" />');
  80                                         // append this element to the select menu
  81                                         $this.append(optgroup_el);
  82                                         // for each item in the group
  83                                         for (name in group) {
  84                                                 // append an option to the optgroup
  85                                                 optgroup_el.append('<option value='+group[name]+'>'+name+'</option>');
  86                                         }
  87                                 }
  88                         }
  89                 },
  90                 buttonHandler: function (e) {
  91                         var $this = $(this),
  92                                 select = $this.prev('select'),
  93                                 embed_widget = $this.closest('.embed-widget'),
  94                                 textarea = embed_widget.children('.embedding').eq(0),
  95                                 val, app_label, object_name,
  96                                 href,
  97                                 win;
  98
  99                         // prevent the button from submitting the form
 100                         e.preventDefault();
 101
 102                         // handle the case that they haven't chosen a type to embed
 103                         if (select.val()==='') {
 104                                 alert('Please select a media type to embed.');
 105                                 textarea.focus();
 106                                 return;
 107                         }
 108
 109                         // split the val into app and object
 110                         val = select.val();
 111                         app_label = val.split('.')[0];
 112                         object_name = val.split('.')[1];
 113
 114                         // generate the url for the popup
 115                         // TODO: Find a better way to get the admin URL if possible. This will break if the URL patterns for the admin ever change.
 116                         href=['../../../', app_label,  '/', object_name, '/?pop=1'].join('');
 117
 118                         // open a new window
 119                         win = window.open(href, id_to_windowname(textarea.attr('id')), 'height=500,width=980,resizable=yes,scrollbars=yes');
 120                 },
 121                 appendEmbed: function (textarea, embed_type, embed_id) {
 122                         var $textarea = $(textarea),
 123                                 textarea = $textarea[0], // make sure we're *not* working with a jQuery object
 124                                 current_selection = [textarea.selectionStart, textarea.selectionEnd],
 125                                 current_text = $textarea.val(),
 126                                 embed_string = ['{% embed', embed_type, embed_id, '%}'].join(' '),
 127                                 new_text = current_text.substring(0, current_selection[0]) + embed_string + current_text.substring(current_selection[1]),
 128                                 new_cursor_pos = current_selection[0]+embed_string.length;
 129                         $textarea.val(new_text);
 130                         textarea.setSelectionRange(new_cursor_pos, new_cursor_pos);
 131                 }
 132         }
 133
 134         $(widget.init);
 135 }(django.jQuery));