648c514c28
Add utility methods to convert `render.dom.DirectiveMetadata` to and from maps. This will allow saving and restoring `DirectiveMetadata` in the Angular 2 Transformer. We discussed adding this as a member on `DirectiveMetadata`. Since this is not necessary for anything except the Transformer, we decided to put it into a separate file to avoid shipping it with the Angular 2 core code.
48 lines
1.8 KiB
JavaScript
48 lines
1.8 KiB
JavaScript
import {ListWrapper, MapWrapper} from 'angular2/src/facade/collection';
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import {isPresent} from 'angular2/src/facade/lang';
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import {DirectiveMetadata} from 'angular2/src/render/api';
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/**
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* Converts a [DirectiveMetadata] to a map representation. This creates a copy,
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* that is, subsequent changes to `meta` will not be mirrored in the map.
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*/
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export function directiveMetadataToMap(meta: DirectiveMetadata): Map {
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return MapWrapper.createFromPairs([
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['id', meta.id],
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['selector', meta.selector],
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['compileChildren', meta.compileChildren],
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['hostListeners', _cloneIfPresent(meta.hostListeners)],
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['hostProperties', _cloneIfPresent(meta.hostProperties)],
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['properties', _cloneIfPresent(meta.properties)],
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['readAttributes', _cloneIfPresent(meta.readAttributes)],
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['type', meta.type],
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['version', 1]
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]);
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}
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/**
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* Converts a map representation of [DirectiveMetadata] into a
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* [DirectiveMetadata] object. This creates a copy, that is, subsequent changes
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* to `map` will not be mirrored in the [DirectiveMetadata] object.
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*/
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export function directiveMetadataFromMap(map: Map): DirectiveMetadata {
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return new DirectiveMetadata({
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id: MapWrapper.get(map, 'id'),
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selector: MapWrapper.get(map, 'selector'),
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compileChildren: MapWrapper.get(map, 'compileChildren'),
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hostListeners: _cloneIfPresent(MapWrapper.get(map, 'hostListeners')),
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hostProperties: _cloneIfPresent(MapWrapper.get(map, 'hostProperties')),
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properties: _cloneIfPresent(MapWrapper.get(map, 'properties')),
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readAttributes: _cloneIfPresent(MapWrapper.get(map, 'readAttributes')),
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type: MapWrapper.get(map, 'type')
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});
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}
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/**
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* Clones the [List] or [Map] `o` if it is present.
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*/
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function _cloneIfPresent(o) {
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if (!isPresent(o)) return null;
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return ListWrapper.isList(o) ? ListWrapper.clone(o) : MapWrapper.clone(o);
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}
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