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fab-manager/vendor/assets/components/checklist-model/checklist-model.js
2015-05-05 03:10:25 +02:00

117 lines
3.0 KiB
JavaScript

/**
* Checklist-model
* AngularJS directive for list of checkboxes
*/
angular.module('checklist-model', [])
.directive('checklistModel', ['$parse', '$compile', function($parse, $compile) {
// contains
function contains(arr, item, comparator) {
if (angular.isArray(arr)) {
for (var i = arr.length; i--;) {
if (comparator(arr[i], item)) {
return true;
}
}
}
return false;
}
// add
function add(arr, item, comparator) {
arr = angular.isArray(arr) ? arr : [];
if(!contains(arr, item, comparator)) {
arr.push(item);
}
return arr;
}
// remove
function remove(arr, item, comparator) {
if (angular.isArray(arr)) {
for (var i = arr.length; i--;) {
if (comparator(arr[i], item)) {
arr.splice(i, 1);
break;
}
}
}
return arr;
}
// http://stackoverflow.com/a/19228302/1458162
function postLinkFn(scope, elem, attrs) {
// compile with `ng-model` pointing to `checked`
$compile(elem)(scope);
// getter / setter for original model
var getter = $parse(attrs.checklistModel);
var setter = getter.assign;
var checklistChange = $parse(attrs.checklistChange);
// value added to list
var value = $parse(attrs.checklistValue)(scope.$parent);
var comparator = angular.equals;
if (attrs.hasOwnProperty('checklistComparator')){
comparator = $parse(attrs.checklistComparator)(scope.$parent);
}
// watch UI checked change
scope.$watch('checked', function(newValue, oldValue) {
if (newValue === oldValue) {
return;
}
var current = getter(scope.$parent);
if (newValue === true) {
setter(scope.$parent, add(current, value, comparator));
} else {
setter(scope.$parent, remove(current, value, comparator));
}
if (checklistChange) {
checklistChange(scope);
}
});
// declare one function to be used for both $watch functions
function setChecked(newArr, oldArr) {
scope.checked = contains(newArr, value, comparator);
}
// watch original model change
// use the faster $watchCollection method if it's available
if (angular.isFunction(scope.$parent.$watchCollection)) {
scope.$parent.$watchCollection(attrs.checklistModel, setChecked);
} else {
scope.$parent.$watch(attrs.checklistModel, setChecked, true);
}
}
return {
restrict: 'A',
priority: 1000,
terminal: true,
scope: true,
compile: function(tElement, tAttrs) {
if (tElement[0].tagName !== 'INPUT' || tAttrs.type !== 'checkbox') {
throw 'checklist-model should be applied to `input[type="checkbox"]`.';
}
if (!tAttrs.checklistValue) {
throw 'You should provide `checklist-value`.';
}
// exclude recursion
tElement.removeAttr('checklist-model');
// local scope var storing individual checkbox model
tElement.attr('ng-model', 'checked');
return postLinkFn;
}
};
}]);