mirror of
https://github.com/denoland/deno.git
synced 2024-10-31 09:14:20 -04:00
770 lines
20 KiB
TypeScript
770 lines
20 KiB
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import { isTypedArray } from "./util";
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import { TypedArray } from "./types";
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import { TextEncoder } from "./text_encoding";
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import { File, stdout } from "./files";
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import { cliTable } from "./console_table";
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type ConsoleContext = Set<unknown>;
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type ConsoleOptions = Partial<{
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showHidden: boolean;
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depth: number;
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colors: boolean;
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indentLevel: number;
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collapsedAt: number | null;
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}>;
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// Default depth of logging nested objects
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const DEFAULT_MAX_DEPTH = 4;
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// Number of elements an object must have before it's displayed in appreviated
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// form.
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const OBJ_ABBREVIATE_SIZE = 5;
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const STR_ABBREVIATE_SIZE = 100;
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// Char codes
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const CHAR_PERCENT = 37; /* % */
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const CHAR_LOWERCASE_S = 115; /* s */
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const CHAR_LOWERCASE_D = 100; /* d */
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const CHAR_LOWERCASE_I = 105; /* i */
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const CHAR_LOWERCASE_F = 102; /* f */
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const CHAR_LOWERCASE_O = 111; /* o */
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const CHAR_UPPERCASE_O = 79; /* O */
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const CHAR_LOWERCASE_C = 99; /* c */
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export class CSI {
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static kClear = "\x1b[1;1H";
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static kClearScreenDown = "\x1b[0J";
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}
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/* eslint-disable @typescript-eslint/no-use-before-define */
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function cursorTo(stream: File, _x: number, _y?: number): void {
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const uint8 = new TextEncoder().encode(CSI.kClear);
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stream.write(uint8);
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}
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function clearScreenDown(stream: File): void {
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const uint8 = new TextEncoder().encode(CSI.kClearScreenDown);
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stream.write(uint8);
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}
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function getClassInstanceName(instance: unknown): string {
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if (typeof instance !== "object") {
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return "";
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}
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if (!instance) {
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return "";
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}
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const proto = Object.getPrototypeOf(instance);
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if (proto && proto.constructor) {
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return proto.constructor.name; // could be "Object" or "Array"
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}
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return "";
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}
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function createFunctionString(value: Function, _ctx: ConsoleContext): string {
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// Might be Function/AsyncFunction/GeneratorFunction
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const cstrName = Object.getPrototypeOf(value).constructor.name;
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if (value.name && value.name !== "anonymous") {
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// from MDN spec
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return `[${cstrName}: ${value.name}]`;
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}
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return `[${cstrName}]`;
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}
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interface IterablePrintConfig<T> {
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typeName: string;
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displayName: string;
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delims: [string, string];
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entryHandler: (
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entry: T,
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ctx: ConsoleContext,
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level: number,
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maxLevel: number
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) => string;
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}
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function createIterableString<T>(
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value: Iterable<T>,
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ctx: ConsoleContext,
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level: number,
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maxLevel: number,
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config: IterablePrintConfig<T>
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): string {
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if (level >= maxLevel) {
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return `[${config.typeName}]`;
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}
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ctx.add(value);
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const entries: string[] = [];
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// In cases e.g. Uint8Array.prototype
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try {
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for (const el of value) {
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entries.push(config.entryHandler(el, ctx, level + 1, maxLevel));
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}
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} catch (e) {}
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ctx.delete(value);
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const iPrefix = `${config.displayName ? config.displayName + " " : ""}`;
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const iContent = entries.length === 0 ? "" : ` ${entries.join(", ")} `;
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return `${iPrefix}${config.delims[0]}${iContent}${config.delims[1]}`;
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}
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function stringify(
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value: unknown,
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ctx: ConsoleContext,
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level: number,
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maxLevel: number
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): string {
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switch (typeof value) {
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case "string":
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return value;
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case "number":
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// Special handling of -0
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return Object.is(value, -0) ? "-0" : `${value}`;
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case "boolean":
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case "undefined":
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case "symbol":
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return String(value);
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case "bigint":
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return `${value}n`;
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case "function":
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return createFunctionString(value as Function, ctx);
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case "object":
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if (value === null) {
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return "null";
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}
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if (ctx.has(value)) {
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return "[Circular]";
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}
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return createObjectString(value, ctx, level, maxLevel);
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default:
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return "[Not Implemented]";
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}
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}
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// Print strings when they are inside of arrays or objects with quotes
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function stringifyWithQuotes(
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value: unknown,
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ctx: ConsoleContext,
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level: number,
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maxLevel: number
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): string {
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switch (typeof value) {
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case "string":
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const trunc =
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value.length > STR_ABBREVIATE_SIZE
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? value.slice(0, STR_ABBREVIATE_SIZE) + "..."
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: value;
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return JSON.stringify(trunc);
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default:
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return stringify(value, ctx, level, maxLevel);
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}
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}
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function createArrayString(
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value: unknown[],
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ctx: ConsoleContext,
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level: number,
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maxLevel: number
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): string {
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const printConfig: IterablePrintConfig<unknown> = {
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typeName: "Array",
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displayName: "",
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delims: ["[", "]"],
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entryHandler: (el, ctx, level, maxLevel): string =>
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stringifyWithQuotes(el, ctx, level + 1, maxLevel)
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};
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return createIterableString(value, ctx, level, maxLevel, printConfig);
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}
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function createTypedArrayString(
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typedArrayName: string,
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value: TypedArray,
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ctx: ConsoleContext,
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level: number,
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maxLevel: number
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): string {
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const printConfig: IterablePrintConfig<unknown> = {
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typeName: typedArrayName,
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displayName: typedArrayName,
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delims: ["[", "]"],
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entryHandler: (el, ctx, level, maxLevel): string =>
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stringifyWithQuotes(el, ctx, level + 1, maxLevel)
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};
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return createIterableString(value, ctx, level, maxLevel, printConfig);
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}
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function createSetString(
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value: Set<unknown>,
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ctx: ConsoleContext,
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level: number,
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maxLevel: number
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): string {
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const printConfig: IterablePrintConfig<unknown> = {
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typeName: "Set",
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displayName: "Set",
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delims: ["{", "}"],
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entryHandler: (el, ctx, level, maxLevel): string =>
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stringifyWithQuotes(el, ctx, level + 1, maxLevel)
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};
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return createIterableString(value, ctx, level, maxLevel, printConfig);
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}
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function createMapString(
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value: Map<unknown, unknown>,
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ctx: ConsoleContext,
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level: number,
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maxLevel: number
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): string {
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const printConfig: IterablePrintConfig<[unknown, unknown]> = {
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typeName: "Map",
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displayName: "Map",
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delims: ["{", "}"],
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entryHandler: (el, ctx, level, maxLevel): string => {
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const [key, val] = el;
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return `${stringifyWithQuotes(
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key,
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ctx,
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level + 1,
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maxLevel
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)} => ${stringifyWithQuotes(val, ctx, level + 1, maxLevel)}`;
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}
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};
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return createIterableString(value, ctx, level, maxLevel, printConfig);
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}
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function createWeakSetString(): string {
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return "WeakSet { [items unknown] }"; // as seen in Node
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}
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function createWeakMapString(): string {
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return "WeakMap { [items unknown] }"; // as seen in Node
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}
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function createDateString(value: Date): string {
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// without quotes, ISO format
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return value.toISOString();
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}
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function createRegExpString(value: RegExp): string {
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return value.toString();
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}
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/* eslint-disable @typescript-eslint/ban-types */
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function createStringWrapperString(value: String): string {
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return `[String: "${value.toString()}"]`;
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}
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function createBooleanWrapperString(value: Boolean): string {
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return `[Boolean: ${value.toString()}]`;
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}
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function createNumberWrapperString(value: Number): string {
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return `[Number: ${value.toString()}]`;
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}
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/* eslint-enable @typescript-eslint/ban-types */
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// TODO: Promise, requires v8 bindings to get info
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// TODO: Proxy
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function createRawObjectString(
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value: { [key: string]: unknown },
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ctx: ConsoleContext,
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level: number,
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maxLevel: number
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): string {
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if (level >= maxLevel) {
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return "[Object]";
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}
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ctx.add(value);
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let baseString = "";
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const className = getClassInstanceName(value);
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let shouldShowClassName = false;
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if (className && className !== "Object" && className !== "anonymous") {
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shouldShowClassName = true;
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}
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const keys = Object.keys(value);
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const entries: string[] = keys.map(
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(key): string => {
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if (keys.length > OBJ_ABBREVIATE_SIZE) {
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return key;
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} else {
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return `${key}: ${stringifyWithQuotes(
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value[key],
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ctx,
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level + 1,
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maxLevel
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)}`;
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}
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}
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);
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ctx.delete(value);
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if (entries.length === 0) {
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baseString = "{}";
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} else {
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baseString = `{ ${entries.join(", ")} }`;
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}
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if (shouldShowClassName) {
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baseString = `${className} ${baseString}`;
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}
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return baseString;
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}
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function createObjectString(
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value: {},
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...args: [ConsoleContext, number, number]
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): string {
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if (value instanceof Error) {
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return String(value.stack);
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} else if (Array.isArray(value)) {
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return createArrayString(value, ...args);
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} else if (value instanceof Number) {
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return createNumberWrapperString(value);
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} else if (value instanceof Boolean) {
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return createBooleanWrapperString(value);
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} else if (value instanceof String) {
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return createStringWrapperString(value);
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} else if (value instanceof RegExp) {
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return createRegExpString(value);
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} else if (value instanceof Date) {
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return createDateString(value);
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} else if (value instanceof Set) {
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return createSetString(value, ...args);
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} else if (value instanceof Map) {
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return createMapString(value, ...args);
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} else if (value instanceof WeakSet) {
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return createWeakSetString();
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} else if (value instanceof WeakMap) {
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return createWeakMapString();
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} else if (isTypedArray(value)) {
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return createTypedArrayString(
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Object.getPrototypeOf(value).constructor.name,
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value,
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...args
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);
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} else {
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// Otherwise, default object formatting
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return createRawObjectString(value, ...args);
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}
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}
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/** TODO Do not expose this from "deno" namespace.
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* @internal
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*/
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export function stringifyArgs(
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args: unknown[],
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options: ConsoleOptions = {}
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): string {
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const first = args[0];
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let a = 0;
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let str = "";
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let join = "";
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if (typeof first === "string") {
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let tempStr: string;
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let lastPos = 0;
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for (let i = 0; i < first.length - 1; i++) {
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if (first.charCodeAt(i) === CHAR_PERCENT) {
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const nextChar = first.charCodeAt(++i);
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if (a + 1 !== args.length) {
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switch (nextChar) {
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case CHAR_LOWERCASE_S:
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// format as a string
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tempStr = String(args[++a]);
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break;
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case CHAR_LOWERCASE_D:
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case CHAR_LOWERCASE_I:
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// format as an integer
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const tempInteger = args[++a];
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if (typeof tempInteger === "bigint") {
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tempStr = `${tempInteger}n`;
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} else if (typeof tempInteger === "symbol") {
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tempStr = "NaN";
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} else {
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tempStr = `${parseInt(String(tempInteger), 10)}`;
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}
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break;
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case CHAR_LOWERCASE_F:
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// format as a floating point value
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const tempFloat = args[++a];
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if (typeof tempFloat === "symbol") {
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tempStr = "NaN";
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} else {
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tempStr = `${parseFloat(String(tempFloat))}`;
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}
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break;
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case CHAR_LOWERCASE_O:
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case CHAR_UPPERCASE_O:
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// format as an object
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tempStr = stringify(
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args[++a],
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new Set<unknown>(),
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0,
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options.depth != undefined ? options.depth : DEFAULT_MAX_DEPTH
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);
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break;
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case CHAR_PERCENT:
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str += first.slice(lastPos, i);
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lastPos = i + 1;
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continue;
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case CHAR_LOWERCASE_C:
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// TODO: applies CSS style rules to the output string as specified
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continue;
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default:
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// any other character is not a correct placeholder
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continue;
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}
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if (lastPos !== i - 1) {
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str += first.slice(lastPos, i - 1);
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}
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str += tempStr;
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lastPos = i + 1;
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} else if (nextChar === CHAR_PERCENT) {
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str += first.slice(lastPos, i);
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lastPos = i + 1;
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}
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}
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}
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if (lastPos !== 0) {
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a++;
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join = " ";
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if (lastPos < first.length) {
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str += first.slice(lastPos);
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}
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}
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}
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while (a < args.length) {
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const value = args[a];
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str += join;
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if (typeof value === "string") {
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str += value;
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} else {
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// use default maximum depth for null or undefined argument
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str += stringify(
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value,
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new Set<unknown>(),
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0,
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options.depth != undefined ? options.depth : DEFAULT_MAX_DEPTH
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);
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}
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join = " ";
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a++;
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}
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const { collapsedAt, indentLevel } = options;
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const isCollapsed =
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collapsedAt != null && indentLevel != null && collapsedAt <= indentLevel;
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if (!isCollapsed) {
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if (indentLevel != null && indentLevel > 0) {
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const groupIndent = " ".repeat(indentLevel);
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if (str.indexOf("\n") !== -1) {
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str = str.replace(/\n/g, `\n${groupIndent}`);
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}
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str = groupIndent + str;
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}
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str += "\n";
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}
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return str;
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}
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type PrintFunc = (x: string, isErr?: boolean) => void;
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const countMap = new Map<string, number>();
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const timerMap = new Map<string, number>();
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export const isConsoleInstance = Symbol("isConsoleInstance");
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export class Console {
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indentLevel: number;
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collapsedAt: number | null;
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[isConsoleInstance]: boolean = false;
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/** @internal */
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constructor(private printFunc: PrintFunc) {
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this.indentLevel = 0;
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this.collapsedAt = null;
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this[isConsoleInstance] = true;
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}
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/** Writes the arguments to stdout */
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log = (...args: unknown[]): void => {
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this.printFunc(
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stringifyArgs(args, {
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indentLevel: this.indentLevel,
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collapsedAt: this.collapsedAt
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}),
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false
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);
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};
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/** Writes the arguments to stdout */
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debug = this.log;
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/** Writes the arguments to stdout */
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info = this.log;
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/** Writes the properties of the supplied `obj` to stdout */
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dir = (obj: unknown, options: ConsoleOptions = {}): void => {
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this.log(stringifyArgs([obj], options));
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};
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/** Writes the arguments to stdout */
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warn = (...args: unknown[]): void => {
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this.printFunc(
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stringifyArgs(args, {
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indentLevel: this.indentLevel,
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collapsedAt: this.collapsedAt
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}),
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true
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);
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};
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/** Writes the arguments to stdout */
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error = this.warn;
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/** Writes an error message to stdout if the assertion is `false`. If the
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* assertion is `true`, nothing happens.
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*
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* ref: https://console.spec.whatwg.org/#assert
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*/
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assert = (condition = false, ...args: unknown[]): void => {
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if (condition) {
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return;
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}
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if (args.length === 0) {
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this.error("Assertion failed");
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return;
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}
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const [first, ...rest] = args;
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if (typeof first === "string") {
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this.error(`Assertion failed: ${first}`, ...rest);
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return;
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}
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this.error(`Assertion failed:`, ...args);
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};
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count = (label = "default"): void => {
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label = String(label);
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if (countMap.has(label)) {
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const current = countMap.get(label) || 0;
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countMap.set(label, current + 1);
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} else {
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countMap.set(label, 1);
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}
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|
|
this.info(`${label}: ${countMap.get(label)}`);
|
|
};
|
|
|
|
countReset = (label = "default"): void => {
|
|
label = String(label);
|
|
|
|
if (countMap.has(label)) {
|
|
countMap.set(label, 0);
|
|
} else {
|
|
this.warn(`Count for '${label}' does not exist`);
|
|
}
|
|
};
|
|
|
|
table = (data: unknown, properties?: string[]): void => {
|
|
if (properties !== undefined && !Array.isArray(properties)) {
|
|
throw new Error(
|
|
"The 'properties' argument must be of type Array. " +
|
|
"Received type string"
|
|
);
|
|
}
|
|
|
|
if (data === null || typeof data !== "object") {
|
|
return this.log(data);
|
|
}
|
|
|
|
const objectValues: { [key: string]: string[] } = {};
|
|
const indexKeys: string[] = [];
|
|
const values: string[] = [];
|
|
|
|
const stringifyValue = (value: unknown): string =>
|
|
stringifyWithQuotes(value, new Set<unknown>(), 0, 1);
|
|
const toTable = (header: string[], body: string[][]): void =>
|
|
this.log(cliTable(header, body));
|
|
const createColumn = (value: unknown, shift?: number): string[] => [
|
|
...(shift ? [...new Array(shift)].map((): string => "") : []),
|
|
stringifyValue(value)
|
|
];
|
|
|
|
let resultData: { [key: string]: unknown };
|
|
const isSet = data instanceof Set;
|
|
const isMap = data instanceof Map;
|
|
const valuesKey = "Values";
|
|
const indexKey = isSet || isMap ? "(iteration index)" : "(index)";
|
|
|
|
if (data instanceof Set) {
|
|
resultData = [...data];
|
|
} else if (data instanceof Map) {
|
|
let idx = 0;
|
|
resultData = {};
|
|
|
|
data.forEach(
|
|
(v: unknown, k: unknown): void => {
|
|
resultData[idx] = { Key: k, Values: v };
|
|
idx++;
|
|
}
|
|
);
|
|
} else {
|
|
resultData = data!;
|
|
}
|
|
|
|
Object.keys(resultData).forEach(
|
|
(k, idx): void => {
|
|
const value: unknown = resultData[k]!;
|
|
|
|
if (value !== null && typeof value === "object") {
|
|
Object.entries(value as { [key: string]: unknown }).forEach(
|
|
([k, v]): void => {
|
|
if (properties && !properties.includes(k)) {
|
|
return;
|
|
}
|
|
|
|
if (objectValues[k]) {
|
|
objectValues[k].push(stringifyValue(v));
|
|
} else {
|
|
objectValues[k] = createColumn(v, idx);
|
|
}
|
|
}
|
|
);
|
|
|
|
values.push("");
|
|
} else {
|
|
values.push(stringifyValue(value));
|
|
}
|
|
|
|
indexKeys.push(k);
|
|
}
|
|
);
|
|
|
|
const headerKeys = Object.keys(objectValues);
|
|
const bodyValues = Object.values(objectValues);
|
|
const header = [
|
|
indexKey,
|
|
...(properties || [
|
|
...headerKeys,
|
|
!isMap && values.length > 0 && valuesKey
|
|
])
|
|
].filter(Boolean) as string[];
|
|
const body = [indexKeys, ...bodyValues, values];
|
|
|
|
toTable(header, body);
|
|
};
|
|
|
|
time = (label = "default"): void => {
|
|
label = String(label);
|
|
|
|
if (timerMap.has(label)) {
|
|
this.warn(`Timer '${label}' already exists`);
|
|
return;
|
|
}
|
|
|
|
timerMap.set(label, Date.now());
|
|
};
|
|
|
|
timeLog = (label = "default", ...args: unknown[]): void => {
|
|
label = String(label);
|
|
|
|
if (!timerMap.has(label)) {
|
|
this.warn(`Timer '${label}' does not exists`);
|
|
return;
|
|
}
|
|
|
|
const startTime = timerMap.get(label) as number;
|
|
const duration = Date.now() - startTime;
|
|
|
|
this.info(`${label}: ${duration}ms`, ...args);
|
|
};
|
|
|
|
timeEnd = (label = "default"): void => {
|
|
label = String(label);
|
|
|
|
if (!timerMap.has(label)) {
|
|
this.warn(`Timer '${label}' does not exists`);
|
|
return;
|
|
}
|
|
|
|
const startTime = timerMap.get(label) as number;
|
|
timerMap.delete(label);
|
|
const duration = Date.now() - startTime;
|
|
|
|
this.info(`${label}: ${duration}ms`);
|
|
};
|
|
|
|
group = (...label: unknown[]): void => {
|
|
if (label.length > 0) {
|
|
this.log(...label);
|
|
}
|
|
this.indentLevel += 2;
|
|
};
|
|
|
|
groupCollapsed = (...label: unknown[]): void => {
|
|
if (this.collapsedAt == null) {
|
|
this.collapsedAt = this.indentLevel;
|
|
}
|
|
this.group(...label);
|
|
};
|
|
|
|
groupEnd = (): void => {
|
|
if (this.indentLevel > 0) {
|
|
this.indentLevel -= 2;
|
|
}
|
|
if (this.collapsedAt != null && this.collapsedAt >= this.indentLevel) {
|
|
this.collapsedAt = null;
|
|
this.log(); // When the collapsed state ended, outputs a sinle new line.
|
|
}
|
|
};
|
|
|
|
clear = (): void => {
|
|
this.indentLevel = 0;
|
|
cursorTo(stdout, 0, 0);
|
|
clearScreenDown(stdout);
|
|
};
|
|
|
|
static [Symbol.hasInstance](instance: Console): boolean {
|
|
return instance[isConsoleInstance];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* `inspect()` converts input into string that has the same format
|
|
* as printed by `console.log(...)`;
|
|
*/
|
|
export function inspect(value: unknown, options?: ConsoleOptions): string {
|
|
const opts = options || {};
|
|
if (typeof value === "string") {
|
|
return value;
|
|
} else {
|
|
return stringify(
|
|
value,
|
|
new Set<unknown>(),
|
|
0,
|
|
opts.depth != undefined ? opts.depth : DEFAULT_MAX_DEPTH
|
|
);
|
|
}
|
|
}
|