82 lines
1.9 KiB
JavaScript
82 lines
1.9 KiB
JavaScript
import { STDIN_FILENO, TCSANOW, ITermios, TERMIOS_SIZE } from "../common/termios";
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import { cfmakeraw, tcgetattr, tcsetattr, ptr } from "./ffi";
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/**
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* Implementation to toggle raw mode with Bun runtime
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*/
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export class Termios implements ITermios {
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/**
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* Are we in raw mode?
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* @private
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*/
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#inRawMode:boolean;
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/**
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* The saved version of the termios struct for cooked/canonical mode
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* @private
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*/
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#cookedTermios: Uint8Array;
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/**
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* The data for the termios struct we are manipulating
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* @private
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*/
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#termios: Uint8Array;
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/**
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* The pointer to the termios struct
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* @private // this.#ptr = ptr(this.#termios);
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*/
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#ptr: any;
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constructor() {
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this.#inRawMode = false;
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// These are the TypedArrays linked to the raw pointer data
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this.#cookedTermios = new Uint8Array(TERMIOS_SIZE);
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this.#termios = new Uint8Array(TERMIOS_SIZE);
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// The current pointer for C
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this.#ptr = ptr(this.#termios);
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}
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get inRawMode() {
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return this.#inRawMode;
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}
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enableRawMode() {
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if (this.#inRawMode) {
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throw new Error('Can not enable raw mode when in raw mode');
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}
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// Get the current termios settings
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tcgetattr(STDIN_FILENO, this.#ptr);
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// The #ptr property is pointing to the #termios TypedArray. As the pointer
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// is manipulated, the TypedArray is as well. We will use this to save
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// the original canonical/cooked terminal settings for disabling raw mode later.
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this.#cookedTermios = new Uint8Array(this.#termios, 0, 60);
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// Update termios struct with raw settings
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cfmakeraw(this.#ptr);
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// Actually set the new termios settings
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tcsetattr(STDIN_FILENO, TCSANOW, this.#ptr);
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this.#inRawMode = true;
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}
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disableRawMode() {
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// Don't even bother throwing an error if we try to disable raw mode
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// and aren't in raw mode. It just doesn't really matter.
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if (!this.#inRawMode) {
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return;
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}
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const oldTermiosPtr = ptr(this.#cookedTermios);
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tcsetattr(STDIN_FILENO, TCSANOW, oldTermiosPtr);
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this.#inRawMode = false;
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}
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}
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