@dodona/papyros/dist/input/UserInputHandler.js

Scratchpad for multiple programming languages in the browser.

import { t } from "../util/Util";
import { Renderable } from "../util/Rendering";
/**
 * Base class for components that handle input from the user
 */
export class UserInputHandler extends Renderable {
    /**
     * Construct a new UserInputHandler
     * @param {function()} inputCallback  Callback for when the user has entered a value
     */
    constructor(inputCallback) {
        super();
        this.waiting = false;
        this.inputCallback = inputCallback;
    }
    /**
     * Wait for input of the user for a certain prompt
     * @param {boolean} waiting Whether we are waiting for input
     * @param {string} prompt Optional message to display if waiting
     */
    waitWithPrompt(waiting, prompt = "") {
        this.waiting = waiting;
        this.setPlaceholder(prompt || t(`Papyros.input_placeholder.${this.getInputMode()}`));
        if (this.waiting) {
            // Focusing is a rendering operation
            // Subclasses can execute code after this operation, skipping the rendering
            // Using setTimeout ensures rendering will be done when the main thread has time
            // More info here: https://stackoverflow.com/questions/1096436/document-getelementbyidid-focus-is-not-working-for-firefox-or-chrome
            setTimeout(() => this.focus(), 0);
        }
    }
    /**
     * Helper method to reset internal state
     */
    reset() {
        this.waiting = false;
    }
}
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