Source: password_prompt.js

/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { NullL10n } from './ui_utils.js'
import { PasswordResponses } from 'pdfjs-dist'

/**
 * @typedef {Object} PasswordPromptOptions
 * @property {string} overlayName - Name of the overlay for the overlay manager.
 * @property {HTMLDivElement} container - Div container for the overlay.
 * @property {HTMLParagraphElement} label - Label containing instructions for
 *                                          entering the password.
 * @property {HTMLInputElement} input - Input field for entering the password.
 * @property {HTMLButtonElement} submitButton - Button for submitting the
 *                                              password.
 * @property {HTMLButtonElement} cancelButton - Button for cancelling password
 *                                              entry.
 */

class PasswordPrompt {
  /**
   * @param {PasswordPromptOptions} options
   * @param {OverlayManager} overlayManager - Manager for the viewer overlays.
   * @param {IL10n} l10n - Localization service.
   */
  constructor(options, overlayManager, l10n = NullL10n) {
    this.overlayName = options.overlayName
    this.container = options.container
    this.label = options.label
    this.input = options.input
    this.submitButton = options.submitButton
    this.cancelButton = options.cancelButton
    this.overlayManager = overlayManager
    this.l10n = l10n

    this.updateCallback = null
    this.reason = null

    // Attach the event listeners.
    this.submitButton.addEventListener('click', this.verify.bind(this))
    this.cancelButton.addEventListener('click', this.close.bind(this))
    this.input.addEventListener('keydown', (e) => {
      if (e.keyCode === /* Enter = */ 13) {
        this.verify()
      }
    })

    this.overlayManager.register(
      this.overlayName,
      this.container,
      this.close.bind(this),
      true
    )
  }

  open() {
    this.overlayManager.open(this.overlayName).then(() => {
      this.input.focus()

      let promptString
      if (this.reason === PasswordResponses.INCORRECT_PASSWORD) {
        promptString = this.l10n.get(
          'password_invalid',
          null,
          'Invalid password. Please try again.'
        )
      } else {
        promptString = this.l10n.get(
          'password_label',
          null,
          'Enter the password to open this PDF file.'
        )
      }

      promptString.then((msg) => {
        this.label.textContent = msg
      })
    })
  }

  close() {
    this.overlayManager.close(this.overlayName).then(() => {
      this.input.value = ''
    })
  }

  verify() {
    const password = this.input.value
    if (password && password.length > 0) {
      this.close()
      this.updateCallback(password)
    }
  }

  setUpdateCallback(updateCallback, reason) {
    this.updateCallback = updateCallback
    this.reason = reason
  }
}

export { PasswordPrompt }