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Add order respecting method

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Jonathan Frederic 2014-06-18 18:37:45 -07:00 committed by Jonathan Frederic
parent 636362787b
commit f1269d3de3
1 changed files with 31 additions and 9 deletions
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40
IPython/html/static/widgets/js/widget.js
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@ -337,7 +337,7 @@ function(WidgetManager, _, Backbone){
return null;
},
do_diff: function(old_list, new_list, removed_callback, added_callback) {
do_diff: function(old_list, new_list, removed_callback, added_callback, respect_order) {
// Difference a changed list and call remove and add callbacks for
// each removed and added item in the new list.
//
@ -349,17 +349,39 @@ function(WidgetManager, _, Backbone){
// Callback that is called for each item removed.
// added_callback : Callback(item)
// Callback that is called for each item added.
// [respect_order] : bool [True]
// Whether or not the order of the list matters.
if (respect_order || respect_order===undefined) {
// Walk the lists until an unequal entry is found.
var i;
for (i = 0; i < new_list.length; i++) {
if (i < old_list.length || new_list[i] !== old_list[i]) {
break;
}
}
// removed items
_.each(this.difference(old_list, new_list), function(item, index, list) {
removed_callback(item);
}, this);
// Remove the non-matching items from the old list.
for (var j = i; j < old_list.length; j++) {
console.log(j, old_list.length, old_list[j]);
removed_callback(old_list[j]);
}
// added items
_.each(this.difference(new_list, old_list), function(item, index, list) {
added_callback(item);
}, this);
// Add the rest of the new list items.
for (i; i < new_list.length; i++) {
added_callback(new_list[i]);
}
} else {
// removed items
_.each(this.difference(old_list, new_list), function(item, index, list) {
removed_callback(item);
}, this);
// added items
_.each(this.difference(new_list, old_list), function(item, index, list) {
added_callback(item);
}, this);
}
},
difference: function(a, b) {