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import {
CompletionContext,
CompletionItem,
CompletionList,
Position,
TextDocumentIdentifier,
} from 'vscode-languageserver';
import type { DocumentManager } from '../core/documents';
import type * as d from './interfaces';
import { flatten } from '../utils';
import { FoldingRange } from 'vscode-languageserver-types';
// eslint-disable-next-line no-shadow
enum ExecuteMode {
None,
FirstNonNull,
Collect
}
export class PluginHost {
private plugins: d.Plugin[] = [];
constructor(private documentsManager: DocumentManager) {}
register(plugin: d.Plugin) {
this.plugins.push(plugin);
}
async getCompletions(
textDocument: TextDocumentIdentifier,
position: Position,
completionContext?: CompletionContext
): Promise<CompletionList> {
const document = this.getDocument(textDocument.uri);
if (!document) {
throw new Error('Cannot call methods on an unopened document');
}
const completions = (
await this.execute<CompletionList>(
'getCompletions',
[document, position, completionContext],
ExecuteMode.Collect
)
).filter((completion) => completion != null);
let flattenedCompletions = flatten(completions.map((completion) => completion.items));
const isIncomplete = completions.reduce(
(incomplete, completion) => incomplete || completion.isIncomplete,
false as boolean
);
return CompletionList.create(flattenedCompletions, isIncomplete);
}
async resolveCompletion(
textDocument: TextDocumentIdentifier,
completionItem: d.AppCompletionItem
): Promise<CompletionItem> {
const document = this.getDocument(textDocument.uri);
if (!document) {
throw new Error('Cannot call methods on an unopened document');
}
const result = await this.execute<CompletionItem>(
'resolveCompletion',
[document, completionItem],
ExecuteMode.FirstNonNull
);
return result ?? completionItem;
}
async doTagComplete(
textDocument: TextDocumentIdentifier,
position: Position
): Promise<string | null> {
const document = this.getDocument(textDocument.uri);
if (!document) {
throw new Error('Cannot call methods on an unopened document');
}
return this.execute<string | null>(
'doTagComplete',
[document, position],
ExecuteMode.FirstNonNull
);
}
async getFoldingRanges(
textDocument: TextDocumentIdentifier
): Promise<FoldingRange[]|null> {
const document = this.getDocument(textDocument.uri);
if (!document) {
throw new Error('Cannot call methods on an unopened document');
}
const foldingRanges = flatten(await this.execute<FoldingRange[]>(
'getFoldingRanges',
[document],
ExecuteMode.Collect
)).filter((completion) => completion != null)
return foldingRanges;
}
onWatchFileChanges(onWatchFileChangesParams: any[]): void {
for (const support of this.plugins) {
support.onWatchFileChanges?.(onWatchFileChangesParams);
}
}
private getDocument(uri: string) {
return this.documentsManager.get(uri);
}
private execute<T>(
name: keyof d.LSProvider,
args: any[],
mode: ExecuteMode.FirstNonNull
): Promise<T | null>;
private execute<T>(
name: keyof d.LSProvider,
args: any[],
mode: ExecuteMode.Collect
): Promise<T[]>;
private execute(name: keyof d.LSProvider, args: any[], mode: ExecuteMode.None): Promise<void>;
private async execute<T>(
name: keyof d.LSProvider,
args: any[],
mode: ExecuteMode
): Promise<(T | null) | T[] | void> {
const plugins = this.plugins.filter((plugin) => typeof plugin[name] === 'function');
switch (mode) {
case ExecuteMode.FirstNonNull:
for (const plugin of plugins) {
const res = await this.tryExecutePlugin(plugin, name, args, null);
if (res != null) {
return res;
}
}
return null;
case ExecuteMode.Collect:
return Promise.all(
plugins.map((plugin) => this.tryExecutePlugin(plugin, name, args, []))
);
case ExecuteMode.None:
await Promise.all(
plugins.map((plugin) => this.tryExecutePlugin(plugin, name, args, null))
);
return;
}
}
private async tryExecutePlugin(plugin: any, fnName: string, args: any[], failValue: any) {
try {
return await plugin[fnName](...args);
} catch (e) {
console.error(e);
return failValue;
}
}
}
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