Created
March 29, 2016 14:21
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Pauses all the children's $$watchers if the expression on the attribute evaluates to true, on false it restores any backed up $$watchers http://stackoverflow.com/a/29840248/411284
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| app.directive('pauseChildrenWatchersIf', function(){ | |
| return { | |
| link: function (scope, element, attrs) { | |
| scope.$watch(attrs.pauseChildrenWatchersIf, function (newVal) { | |
| if (newVal === undefined) { | |
| return; | |
| } | |
| if (newVal) { | |
| toggleChildrenWatchers(element, true) | |
| } else { | |
| toggleChildrenWatchers(element, false) | |
| } | |
| }); | |
| function toggleChildrenWatchers(element, pause) { | |
| angular.forEach(element.children(), function (childElement) { | |
| toggleAllWatchers(angular.element(childElement), pause); | |
| }); | |
| } | |
| function toggleAllWatchers(element, pause) { | |
| var data = element.data(); | |
| if (data.hasOwnProperty('$scope') && data.$scope.hasOwnProperty('$$watchers') && data.$scope.$$watchers) { | |
| if (pause) { | |
| data._bk_$$watchers = []; | |
| $.each(data.$scope.$$watchers, function (i, watcher) { | |
| data._bk_$$watchers.push($.extend(true, {}, watcher)) | |
| }); | |
| data.$scope.$$watchers = []; | |
| } else { | |
| if (data.hasOwnProperty('_bk_$$watchers')) { | |
| $.each(data._bk_$$watchers, function (i, watcher) { | |
| data.$scope.$$watchers.push($.extend(true, {}, watcher)) | |
| }); | |
| } | |
| } | |
| } | |
| toggleChildrenWatchers(element, pause); | |
| } | |
| } | |
| } | |
| }); |
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