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add a has method to mirror for checking whether an id is in the map

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This commit is contained in:
Yanzhen Yu
2018-10-31 12:06:32 +08:00
parent 7b9e57bd6c
commit 8acf670a99
2 changed files with 6 additions and 2 deletions
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3
src/types.ts
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@@ -209,8 +209,9 @@ export type inputCallback = (v: inputValue & { id: number }) => void;
export type Mirror = { export type Mirror = {
map: idNodeMap; map: idNodeMap;
getId: (n: INode) => number; getId: (n: INode) => number;
getNode: (id: number) => INode; getNode: (id: number) => INode | null;
removeNodeFromMap: (n: INode) => void; removeNodeFromMap: (n: INode) => void;
has: (id: number) => boolean;
}; };
export type throttleOptions = { export type throttleOptions = {

5
src/utils.ts
View File

@@ -21,7 +21,7 @@ export const mirror: Mirror = {
return n.__sn && n.__sn.id; return n.__sn && n.__sn.id;
}, },
getNode(id) { getNode(id) {
return mirror.map[id]; return mirror.map[id] || null;
}, },
// TODO: use a weakmap to get rid of manually memory management // TODO: use a weakmap to get rid of manually memory management
removeNodeFromMap(n) { removeNodeFromMap(n) {
@@ -33,6 +33,9 @@ export const mirror: Mirror = {
); );
} }
}, },
has(id) {
return mirror.map.hasOwnProperty(id);
},
}; };
// copy from underscore and modified // copy from underscore and modified