29 lines
1.3 KiB
TypeScript
29 lines
1.3 KiB
TypeScript
/** 一处定义。uri 是 Uri.toString()，用来和当前文件比、去重。 */
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export interface DefinitionTarget {
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uri: string
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line: number
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character: number
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}
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/**
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* ⌘ / Ctrl + 点击查到定义之后怎么做：
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* none 不动；pick 让用户从几处里挑一处，挑好的那处再交给 definitionAction 决定；
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* here 定义就在当前文件，预览原地滚过去；elsewhere 在另一个文件，用哪种编辑器打开见 openTarget.ts 的 openingFor。
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*/
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export type DefinitionAction<T extends DefinitionTarget>
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= | { kind: 'none' }
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| { kind: 'pick', targets: T[] }
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| { kind: 'here' | 'elsewhere', target: T }
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/** 定义提供者查到的几处（可能重复）→ 怎么跳。current 是当前文件的 Uri.toString()。 */
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export function definitionAction<T extends DefinitionTarget>(targets: readonly T[], current: string): DefinitionAction<T> {
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const unique = targets.filter((target, i) =>
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targets.findIndex(other => other.uri === target.uri && other.line === target.line && other.character === target.character) === i)
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if (unique.length === 0)
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return { kind: 'none' }
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if (unique.length > 1)
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return { kind: 'pick', targets: unique }
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const [target] = unique
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return { kind: target.uri === current ? 'here' : 'elsewhere', target }
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}
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