112 lines
2.5 KiB
TypeScript
112 lines
2.5 KiB
TypeScript
/**
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import fs from 'fs';
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export interface RecorderOutput {
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printLn(text: string): void;
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popLn(text: string): void;
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flush(): void;
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}
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export interface Writable {
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write(data: string): void;
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columns(): number;
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}
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export class OutputMultiplexer implements RecorderOutput {
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private _outputs: RecorderOutput[]
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private _enabled = true;
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constructor(outputs: RecorderOutput[]) {
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this._outputs = outputs;
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}
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setEnabled(enabled: boolean) {
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this._enabled = enabled;
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}
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printLn(text: string) {
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if (!this._enabled)
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return;
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for (const output of this._outputs)
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output.printLn(text);
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}
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popLn(text: string) {
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if (!this._enabled)
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return;
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for (const output of this._outputs)
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output.popLn(text);
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}
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flush() {
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if (!this._enabled)
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return;
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for (const output of this._outputs)
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output.flush();
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}
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}
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export class BufferedOutput implements RecorderOutput {
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private _lines: string[] = [];
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private _buffer: string | null = null;
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private _onUpdate: ((text: string) => void);
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constructor(onUpdate: (text: string) => void = () => {}) {
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this._onUpdate = onUpdate;
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}
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printLn(text: string) {
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this._buffer = null;
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this._lines.push(...text.trimEnd().split('\n'));
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this._onUpdate(this.buffer());
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}
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popLn(text: string) {
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this._buffer = null;
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this._lines.length -= text.trimEnd().split('\n').length;
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}
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buffer(): string {
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if (this._buffer === null)
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this._buffer = this._lines.join('\n');
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return this._buffer;
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}
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clear() {
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this._lines = [];
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this._buffer = null;
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this._onUpdate(this.buffer());
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}
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flush() {
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}
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}
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export class FileOutput extends BufferedOutput implements RecorderOutput {
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private _fileName: string;
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constructor(fileName: string) {
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super();
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this._fileName = fileName;
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process.on('exit', () => this.flush());
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}
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flush() {
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fs.writeFileSync(this._fileName, this.buffer());
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}
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}
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