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Add console.clear() (#1562)

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binaryta 2019-01-25 03:24:39 +09:00 • committed by Ryan Dahl
parent 6904628aaa
commit 4a0a47dcde
2 changed files with 44 additions and 2 deletions
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22
js/console.ts
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@ -1,5 +1,7 @@
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import { isTypedArray } from "./util";
import { TextEncoder } from "./text_encoding";
import { File, stdout } from "./files";
// tslint:disable-next-line:no-any
type ConsoleContext = Set<any>;
@ -23,6 +25,20 @@ const CHAR_LOWERCASE_F = 102; /* f */
const CHAR_LOWERCASE_O = 111; /* o */
const CHAR_UPPERCASE_O = 79; /* O */
const CHAR_LOWERCASE_C = 99; /* c */
export class CSI {
static kClear = "\x1b[1;1H";
static kClearScreenDown = "\x1b[0J";
}
function cursorTo(stream: File, x: number, y?: number) {
const uint8 = new TextEncoder().encode(CSI.kClear);
stream.write(uint8);
}
function clearScreenDown(stream: File) {
const uint8 = new TextEncoder().encode(CSI.kClearScreenDown);
stream.write(uint8);
}
// tslint:disable-next-line:no-any
function getClassInstanceName(instance: any): string {
@ -639,6 +655,12 @@ export class Console {
this.log(); // When the collapsed state ended, outputs a sinle new line.
}
};
clear = (): void => {
this.indentLevel = 0;
cursorTo(stdout, 0, 0);
clearScreenDown(stdout);
};
}
/**