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/*
jQuery UI Sortable plugin wrapper
@param [ui-sortable] {object} Options to pass to $.fn.sortable() merged onto ui.config
*/
angular.module('ui.directives').directive('uiSortable', [
'ui.config', function(uiConfig) {
return {
require: '?ngModel',
link: function(scope, element, attrs, ngModel) {
var onReceive, onRemove, onStart, onUpdate, opts, _receive, _remove, _start, _update;
opts = angular.extend({}, uiConfig.sortable, scope.$eval(attrs.uiSortable));
if (ngModel) {
ngModel.$render = function() {
element.sortable( "refresh" );
};
onStart = function(e, ui) {
// Save position of dragged item
ui.item.sortable = { index: ui.item.index() };
};
onUpdate = function(e, ui) {
// For some reason the reference to ngModel in stop() is wrong
ui.item.sortable.resort = ngModel;
};
onReceive = function(e, ui) {
ui.item.sortable.relocate = true;
// added item to array into correct position and set up flag
ngModel.$modelValue.splice(ui.item.index(), 0, ui.item.sortable.moved);
};
onRemove = function(e, ui) {
// copy data into item
if (ngModel.$modelValue.length === 1) {
ui.item.sortable.moved = ngModel.$modelValue.splice(0, 1)[0];
} else {
ui.item.sortable.moved = ngModel.$modelValue.splice(ui.item.sortable.index, 1)[0];
}
};
onStop = function(e, ui) {
// digest all prepared changes
if (ui.item.sortable.resort && !ui.item.sortable.relocate) {
// Fetch saved and current position of dropped element
var end, start;
start = ui.item.sortable.index;
end = ui.item.index();
if (start < end)
end--;
// Reorder array and apply change to scope
ui.item.sortable.resort.$modelValue.splice(end, 0, ui.item.sortable.resort.$modelValue.splice(start, 1)[0]);
}
if (ui.item.sortable.resort || ui.item.sortable.relocate) {
scope.$apply();
}
};
// If user provided 'start' callback compose it with onStart function
_start = opts.start;
opts.start = function(e, ui) {
onStart(e, ui);
if (typeof _start === "function")
_start(e, ui);
};
// If user provided 'start' callback compose it with onStart function
_stop = opts.stop;
opts.stop = function(e, ui) {
onStop(e, ui);
if (typeof _stop === "function")
_stop(e, ui);
};
// If user provided 'update' callback compose it with onUpdate function
_update = opts.update;
opts.update = function(e, ui) {
onUpdate(e, ui);
if (typeof _update === "function")
_update(e, ui);
};
// If user provided 'receive' callback compose it with onReceive function
_receive = opts.receive;
opts.receive = function(e, ui) {
onReceive(e, ui);
if (typeof _receive === "function")
_receive(e, ui);
};
// If user provided 'remove' callback compose it with onRemove function
_remove = opts.remove;
opts.remove = function(e, ui) {
onRemove(e, ui);
if (typeof _remove === "function")
_remove(e, ui);
};
}
// Create sortable
element.sortable(opts);
}
};
}
]);
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