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'use strict';
/**
* @ngdoc directive
* @name angular.module.ng.$compileProvider.directive.ngSwitch
* @restrict EA
*
* @description
* Conditionally change the DOM structure.
*
* @usageContent
* <ANY ng-switch-when="matchValue1">...</ANY>
* <ANY ng-switch-when="matchValue2">...</ANY>
* ...
* <ANY ng-switch-default>...</ANY>
*
* @scope
* @param {*} ngSwitch|on expression to match against <tt>ng-switch-when</tt>.
* @paramDescription
* On child elments add:
*
* * `ngSwitchWhen`: the case statement to match against. If match then this
* case will be displayed.
* * `ngSwitchDefault`: the default case when no other casses match.
*
* @example
<doc:example>
<doc:source>
<script>
function Ctrl($scope) {
$scope.items = ['settings', 'home', 'other'];
$scope.selection = $scope.items[0];
}
</script>
<div ng-controller="Ctrl">
<select ng-model="selection" ng-options="item for item in items">
</select>
<tt>selection={{selection}}</tt>
<hr/>
<div ng-switch on="selection" >
<div ng-switch-when="settings">Settings Div</div>
<span ng-switch-when="home">Home Span</span>
<span ng-switch-default>default</span>
</div>
</div>
</doc:source>
<doc:scenario>
it('should start in settings', function() {
expect(element('.doc-example-live [ng-switch]').text()).toMatch(/Settings Div/);
});
it('should change to home', function() {
select('selection').option('home');
expect(element('.doc-example-live [ng-switch]').text()).toMatch(/Home Span/);
});
it('should select deafault', function() {
select('selection').option('other');
expect(element('.doc-example-live [ng-switch]').text()).toMatch(/default/);
});
</doc:scenario>
</doc:example>
*/
var NG_SWITCH = 'ng-switch';
var ngSwitchDirective = valueFn({
restrict: 'EA',
compile: function(element, attr) {
var watchExpr = attr.ngSwitch || attr.on,
cases = {};
element.data(NG_SWITCH, cases);
return function(scope, element){
var selectedTransclude,
selectedElement,
selectedScope;
scope.$watch(watchExpr, function(value) {
if (selectedElement) {
selectedScope.$destroy();
selectedElement.remove();
selectedElement = selectedScope = null;
}
if ((selectedTransclude = cases['!' + value] || cases['?'])) {
scope.$eval(attr.change);
selectedScope = scope.$new();
selectedTransclude(selectedScope, function(caseElement) {
selectedElement = caseElement;
element.append(caseElement);
});
}
});
};
}
});
var ngSwitchWhenDirective = ngDirective({
transclude: 'element',
priority: 500,
compile: function(element, attrs, transclude) {
var cases = element.inheritedData(NG_SWITCH);
assertArg(cases);
cases['!' + attrs.ngSwitchWhen] = transclude;
}
});
var ngSwitchDefaultDirective = ngDirective({
transclude: 'element',
priority: 500,
compile: function(element, attrs, transclude) {
var cases = element.inheritedData(NG_SWITCH);
assertArg(cases);
cases['?'] = transclude;
}
});
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