clojureDefinition.ts

import * as vscode from 'vscode';

import { cljConnection } from './cljConnection';
import { cljParser } from './cljParser';
import { nreplClient } from './nreplClient';

export class ClojureDefinitionProvider implements vscode.DefinitionProvider {

    provideDefinition(document: vscode.TextDocument, position: vscode.Position, token: vscode.CancellationToken): Thenable<vscode.Definition> {
        if (!cljConnection.isConnected())
            return Promise.reject('No nREPL connected.');

        const wordRange = document.getWordRangeAtPosition(position);
        if (!wordRange)
            return Promise.reject('No word selected.');

        const currentWord: string = document.lineAt(position.line).text.slice(wordRange.start.character, wordRange.end.character);
        const ns = cljParser.getNamespace(document.getText());

        return cljConnection.sessionForFilename(document.fileName).then(session => {
            return nreplClient.info(currentWord, ns, session.id).then(info => {
                if (!info.file)
                    return Promise.reject('No word definition found.');

                let uri = vscode.Uri.parse(info.file);
                let pos = new vscode.Position(info.line - 1, info.column)
                let definition = new vscode.Location(uri, pos);
                return Promise.resolve(definition);
            });
        });
    }

}