frontend/app/assets/javascripts/mno_enterprise/lib/sortable.js
/*
jQuery UI Sortable plugin wrapper
@param [ui-sortable] {object} Options to pass to $.fn.sortable() merged onto ui.config
*/
angular.module('ui.sortable', [])
.value('uiSortableConfig',{})
.directive('uiSortable', [
'uiSortableConfig', '$timeout', '$log',
function(uiSortableConfig, $timeout, $log) {
return {
require: '?ngModel',
scope: {
ngModel: '=ngModel',
uiSortable: '=uiSortable'
},
link: function(scope, element, attrs, ngModel) {
var savedNodes;
function combineCallbacks(first,second){
if(second && (typeof second === 'function')) {
return function(e, ui) {
first(e, ui);
second(e, ui);
};
}
return first;
}
function hasSortingHelper (element, ui) {
var helperOption = element.sortable('option','helper');
return helperOption === 'clone' || (typeof helperOption === 'function' && ui.item.sortable.isCustomHelperUsed());
}
// thanks jquery-ui
function isFloating (item) {
return (/left|right/).test(item.css('float')) || (/inline|table-cell/).test(item.css('display'));
}
function afterStop(e, ui) {
ui.item.sortable._destroy();
}
var opts = {};
// directive specific options
var directiveOpts = {
'ui-floating': undefined
};
var callbacks = {
receive: null,
remove:null,
start:null,
stop:null,
update:null
};
var wrappers = {
helper: null
};
angular.extend(opts, directiveOpts, uiSortableConfig, scope.uiSortable);
if (!angular.element.fn || !angular.element.fn.jquery) {
$log.error('ui.sortable: jQuery should be included before AngularJS!');
return;
}
if (ngModel) {
// When we add or remove elements, we need the sortable to 'refresh'
// so it can find the new/removed elements.
scope.$watch('ngModel.length', function() {
// Timeout to let ng-repeat modify the DOM
$timeout(function() {
// ensure that the jquery-ui-sortable widget instance
// is still bound to the directive's element
if (!!element.sortable('instance')) {
element.sortable('refresh');
}
}, 0, false);
});
callbacks.start = function(e, ui) {
if (opts['ui-floating'] === 'auto') {
// since the drag has started, the element will be
// absolutely positioned, so we check its siblings
var siblings = ui.item.siblings();
angular.element(e.target).sortable('instance').floating = isFloating(siblings);
}
// Save the starting position of dragged item
ui.item.sortable = {
model: ngModel.$modelValue[ui.item.index()],
index: ui.item.index(),
source: ui.item.parent(),
sourceModel: ngModel.$modelValue,
cancel: function () {
ui.item.sortable._isCanceled = true;
},
isCanceled: function () {
return ui.item.sortable._isCanceled;
},
isCustomHelperUsed: function () {
return !!ui.item.sortable._isCustomHelperUsed;
},
_isCanceled: false,
_isCustomHelperUsed: ui.item.sortable._isCustomHelperUsed,
_destroy: function () {
angular.forEach(ui.item.sortable, function(value, key) {
ui.item.sortable[key] = undefined;
});
}
};
};
callbacks.activate = function(/*e, ui*/) {
// We need to make a copy of the current element's contents so
// we can restore it after sortable has messed it up.
// This is inside activate (instead of start) in order to save
// both lists when dragging between connected lists.
savedNodes = element.contents();
// If this list has a placeholder (the connected lists won't),
// don't inlcude it in saved nodes.
var placeholder = element.sortable('option','placeholder');
// placeholder.element will be a function if the placeholder, has
// been created (placeholder will be an object). If it hasn't
// been created, either placeholder will be false if no
// placeholder class was given or placeholder.element will be
// undefined if a class was given (placeholder will be a string)
if (placeholder && placeholder.element && typeof placeholder.element === 'function') {
var phElement = placeholder.element();
// workaround for jquery ui 1.9.x,
// not returning jquery collection
phElement = angular.element(phElement);
// exact match with the placeholder's class attribute to handle
// the case that multiple connected sortables exist and
// the placehoilder option equals the class of sortable items
var excludes = element.find('[class="' + phElement.attr('class') + '"]');
savedNodes = savedNodes.not(excludes);
}
};
callbacks.update = function(e, ui) {
// Save current drop position but only if this is not a second
// update that happens when moving between lists because then
// the value will be overwritten with the old value
if(!ui.item.sortable.received) {
ui.item.sortable.dropindex = ui.item.index();
var droptarget = ui.item.parent();
ui.item.sortable.droptarget = droptarget;
var attr = droptarget.attr('ng-model') || droptarget.attr('data-ng-model');
ui.item.sortable.droptargetModel = droptarget.scope().$eval(attr);
// Cancel the sort (let ng-repeat do the sort for us)
// Don't cancel if this is the received list because it has
// already been canceled in the other list, and trying to cancel
// here will mess up the DOM.
element.sortable('cancel');
}
// Put the nodes back exactly the way they started (this is very
// important because ng-repeat uses comment elements to delineate
// the start and stop of repeat sections and sortable doesn't
// respect their order (even if we cancel, the order of the
// comments are still messed up).
if (hasSortingHelper(element, ui) && !ui.item.sortable.received &&
element.sortable( 'option', 'appendTo' ) === 'parent') {
// restore all the savedNodes except .ui-sortable-helper element
// (which is placed last). That way it will be garbage collected.
savedNodes = savedNodes.not(savedNodes.last());
}
savedNodes.appendTo(element);
// If this is the target connected list then
// it's safe to clear the restored nodes since:
// update is currently running and
// stop is not called for the target list.
if(ui.item.sortable.received) {
savedNodes = null;
}
// If received is true (an item was dropped in from another list)
// then we add the new item to this list otherwise wait until the
// stop event where we will know if it was a sort or item was
// moved here from another list
if(ui.item.sortable.received && !ui.item.sortable.isCanceled()) {
scope.$apply(function () {
ngModel.$modelValue.splice(ui.item.sortable.dropindex, 0,
ui.item.sortable.moved);
});
}
};
callbacks.stop = function(e, ui) {
// If the received flag hasn't be set on the item, this is a
// normal sort, if dropindex is set, the item was moved, so move
// the items in the list.
if(!ui.item.sortable.received &&
('dropindex' in ui.item.sortable) &&
!ui.item.sortable.isCanceled()) {
scope.$apply(function () {
ngModel.$modelValue.splice(
ui.item.sortable.dropindex, 0,
ngModel.$modelValue.splice(ui.item.sortable.index, 1)[0]);
});
} else {
// if the item was not moved, then restore the elements
// so that the ngRepeat's comment are correct.
if ((!('dropindex' in ui.item.sortable) || ui.item.sortable.isCanceled()) &&
!hasSortingHelper(element, ui)) {
savedNodes.appendTo(element);
}
}
// It's now safe to clear the savedNodes
// since stop is the last callback.
savedNodes = null;
};
callbacks.receive = function(e, ui) {
// An item was dropped here from another list, set a flag on the
// item.
ui.item.sortable.received = true;
};
callbacks.remove = function(e, ui) {
// Workaround for a problem observed in nested connected lists.
// There should be an 'update' event before 'remove' when moving
// elements. If the event did not fire, cancel sorting.
if (!('dropindex' in ui.item.sortable)) {
element.sortable('cancel');
ui.item.sortable.cancel();
}
// Remove the item from this list's model and copy data into item,
// so the next list can retrive it
if (!ui.item.sortable.isCanceled()) {
scope.$apply(function () {
ui.item.sortable.moved = ngModel.$modelValue.splice(
ui.item.sortable.index, 1)[0];
});
}
};
wrappers.helper = function (inner) {
if (inner && typeof inner === 'function') {
return function (e, item) {
var innerResult = inner(e, item);
item.sortable._isCustomHelperUsed = item !== innerResult;
return innerResult;
};
}
return inner;
};
scope.$watch('uiSortable', function(newVal /*, oldVal*/) {
// ensure that the jquery-ui-sortable widget instance
// is still bound to the directive's element
if (!!element.sortable('instance')) {
angular.forEach(newVal, function(value, key) {
// if it's a custom option of the directive,
// handle it approprietly
if (key in directiveOpts) {
if (key === 'ui-floating' && (value === false || value === true)) {
element.sortable('instance').floating = value;
}
opts[key] = value;
return;
}
if (callbacks[key]) {
if( key === 'stop' ){
// call apply after stop
value = combineCallbacks(
value, function() { scope.$apply(); });
value = combineCallbacks(value, afterStop);
}
// wrap the callback
value = combineCallbacks(callbacks[key], value);
} else if (wrappers[key]) {
value = wrappers[key](value);
}
opts[key] = value;
element.sortable('option', key, value);
});
}
}, true);
angular.forEach(callbacks, function(value, key) {
opts[key] = combineCallbacks(value, opts[key]);
if( key === 'stop' ){
opts[key] = combineCallbacks(opts[key], afterStop);
}
});
} else {
$log.info('ui.sortable: ngModel not provided!', element);
}
// Create sortable
element.sortable(opts);
}
};
}
]);