81dfa61777
*Please note:* This situation should never happen in practice, but it nonetheless cannot hurt to fix this. If the `PasswordPrompt.open` method would ever be called synchronously back-to-back *and* if opening of the dialog fails the first time, then the second invocation would remain pending indefinitely since we just clear out the capability.
131 lines
3.9 KiB
JavaScript
131 lines
3.9 KiB
JavaScript
/* Copyright 2012 Mozilla Foundation
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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 { PasswordResponses, PromiseCapability } from "pdfjs-lib";
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/**
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* @typedef {Object} PasswordPromptOptions
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* @property {HTMLDialogElement} dialog - The overlay's DOM element.
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* @property {HTMLParagraphElement} label - Label containing instructions for
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* entering the password.
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* @property {HTMLInputElement} input - Input field for entering the password.
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* @property {HTMLButtonElement} submitButton - Button for submitting the
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* password.
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* @property {HTMLButtonElement} cancelButton - Button for cancelling password
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* entry.
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*/
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class PasswordPrompt {
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#activeCapability = null;
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#updateCallback = null;
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#reason = null;
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/**
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* @param {PasswordPromptOptions} options
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* @param {OverlayManager} overlayManager - Manager for the viewer overlays.
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* @param {IL10n} l10n - Localization service.
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* @param {boolean} [isViewerEmbedded] - If the viewer is embedded, in e.g.
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* an <iframe> or an <object>. The default value is `false`.
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*/
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constructor(options, overlayManager, l10n, isViewerEmbedded = false) {
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this.dialog = options.dialog;
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this.label = options.label;
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this.input = options.input;
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this.submitButton = options.submitButton;
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this.cancelButton = options.cancelButton;
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this.overlayManager = overlayManager;
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this.l10n = l10n;
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this._isViewerEmbedded = isViewerEmbedded;
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// Attach the event listeners.
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this.submitButton.addEventListener("click", this.#verify.bind(this));
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this.cancelButton.addEventListener("click", this.close.bind(this));
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this.input.addEventListener("keydown", e => {
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if (e.keyCode === /* Enter = */ 13) {
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this.#verify();
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}
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});
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this.overlayManager.register(this.dialog, /* canForceClose = */ true);
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this.dialog.addEventListener("close", this.#cancel.bind(this));
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}
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async open() {
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if (this.#activeCapability) {
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await this.#activeCapability.promise;
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}
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this.#activeCapability = new PromiseCapability();
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try {
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await this.overlayManager.open(this.dialog);
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} catch (ex) {
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this.#activeCapability.resolve();
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throw ex;
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}
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const passwordIncorrect =
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this.#reason === PasswordResponses.INCORRECT_PASSWORD;
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if (!this._isViewerEmbedded || passwordIncorrect) {
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this.input.focus();
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}
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this.label.textContent = await this.l10n.get(
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`password_${passwordIncorrect ? "invalid" : "label"}`
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);
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}
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async close() {
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if (this.overlayManager.active === this.dialog) {
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this.overlayManager.close(this.dialog);
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}
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}
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#verify() {
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const password = this.input.value;
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if (password?.length > 0) {
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this.#invokeCallback(password);
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}
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}
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#cancel() {
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this.#invokeCallback(new Error("PasswordPrompt cancelled."));
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this.#activeCapability.resolve();
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}
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#invokeCallback(password) {
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if (!this.#updateCallback) {
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return; // Ensure that the callback is only invoked once.
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}
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this.close();
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this.input.value = "";
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this.#updateCallback(password);
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this.#updateCallback = null;
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}
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async setUpdateCallback(updateCallback, reason) {
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if (this.#activeCapability) {
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await this.#activeCapability.promise;
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}
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this.#updateCallback = updateCallback;
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this.#reason = reason;
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}
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}
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export { PasswordPrompt };
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