Method completer

tools/xsbug-log/xsbug-debugmachine.js:76–108

(line, callback)

	completionsShown = false;

	completer(line, callback) {
		const finish = (result) => {
			let [completions, matched] = result;
			// Nothing to complete if only match is what's already typed
			if (completions.length === 1 && completions[0] === matched)
				completions = [];
			if (completions.length > 1 && !this.completionsShown) {
				this._displayCompletions(completions);
			}
			callback(null, [completions, matched]);
		};
		if (this.broken) {
			const args = line.trimStart().split(/\s+/);
			const cmd = args[0];
			if (cmd === 'print' || cmd === 'p') {
				const expr = line.substring(line.indexOf(cmd) + cmd.length).trimLeft();
				if (expr && expr.includes('.')) {
					this._expandForCompletion(expr, () => {
						finish(this._syncCompleter(line));
					});
					return;
				}
				if (expr) {
					// Expand (..) in globals so built-ins are available for completion
					this._expandGlobalPrototype(() => {
						finish(this._syncCompleter(line));
					});
					return;
				}
			}
		}
		finish(this._syncCompleter(line));
	}

	_displayCompletions(completions) {
		const width = process.stdout.columns || 80;