pdfjs-dist/lib/web/overlay_manager.js

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2018 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.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.OverlayManager = void 0;

var _regenerator = _interopRequireDefault(require("@babel/runtime/regenerator"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var OverlayManager =
/*#__PURE__*/
function () {
  function OverlayManager() {
    _classCallCheck(this, OverlayManager);

    this._overlays = {};
    this._active = null;
    this._keyDownBound = this._keyDown.bind(this);
  }

  _createClass(OverlayManager, [{
    key: "register",
    value: function () {
      var _register = _asyncToGenerator(
      /*#__PURE__*/
      _regenerator.default.mark(function _callee(name, element) {
        var callerCloseMethod,
            canForceClose,
            container,
            _args = arguments;
        return _regenerator.default.wrap(function _callee$(_context) {
          while (1) {
            switch (_context.prev = _context.next) {
              case 0:
                callerCloseMethod = _args.length > 2 && _args[2] !== undefined ? _args[2] : null;
                canForceClose = _args.length > 3 && _args[3] !== undefined ? _args[3] : false;

                if (!(!name || !element || !(container = element.parentNode))) {
                  _context.next = 6;
                  break;
                }

                throw new Error('Not enough parameters.');

              case 6:
                if (!this._overlays[name]) {
                  _context.next = 8;
                  break;
                }

                throw new Error('The overlay is already registered.');

              case 8:
                this._overlays[name] = {
                  element: element,
                  container: container,
                  callerCloseMethod: callerCloseMethod,
                  canForceClose: canForceClose
                };

              case 9:
              case "end":
                return _context.stop();
            }
          }
        }, _callee, this);
      }));

      function register(_x, _x2) {
        return _register.apply(this, arguments);
      }

      return register;
    }()
  }, {
    key: "unregister",
    value: function () {
      var _unregister = _asyncToGenerator(
      /*#__PURE__*/
      _regenerator.default.mark(function _callee2(name) {
        return _regenerator.default.wrap(function _callee2$(_context2) {
          while (1) {
            switch (_context2.prev = _context2.next) {
              case 0:
                if (this._overlays[name]) {
                  _context2.next = 4;
                  break;
                }

                throw new Error('The overlay does not exist.');

              case 4:
                if (!(this._active === name)) {
                  _context2.next = 6;
                  break;
                }

                throw new Error('The overlay cannot be removed while it is active.');

              case 6:
                delete this._overlays[name];

              case 7:
              case "end":
                return _context2.stop();
            }
          }
        }, _callee2, this);
      }));

      function unregister(_x3) {
        return _unregister.apply(this, arguments);
      }

      return unregister;
    }()
  }, {
    key: "open",
    value: function () {
      var _open = _asyncToGenerator(
      /*#__PURE__*/
      _regenerator.default.mark(function _callee3(name) {
        return _regenerator.default.wrap(function _callee3$(_context3) {
          while (1) {
            switch (_context3.prev = _context3.next) {
              case 0:
                if (this._overlays[name]) {
                  _context3.next = 4;
                  break;
                }

                throw new Error('The overlay does not exist.');

              case 4:
                if (!this._active) {
                  _context3.next = 14;
                  break;
                }

                if (!this._overlays[name].canForceClose) {
                  _context3.next = 9;
                  break;
                }

                this._closeThroughCaller();

                _context3.next = 14;
                break;

              case 9:
                if (!(this._active === name)) {
                  _context3.next = 13;
                  break;
                }

                throw new Error('The overlay is already active.');

              case 13:
                throw new Error('Another overlay is currently active.');

              case 14:
                this._active = name;

                this._overlays[this._active].element.classList.remove('hidden');

                this._overlays[this._active].container.classList.remove('hidden');

                window.addEventListener('keydown', this._keyDownBound);

              case 18:
              case "end":
                return _context3.stop();
            }
          }
        }, _callee3, this);
      }));

      function open(_x4) {
        return _open.apply(this, arguments);
      }

      return open;
    }()
  }, {
    key: "close",
    value: function () {
      var _close = _asyncToGenerator(
      /*#__PURE__*/
      _regenerator.default.mark(function _callee4(name) {
        return _regenerator.default.wrap(function _callee4$(_context4) {
          while (1) {
            switch (_context4.prev = _context4.next) {
              case 0:
                if (this._overlays[name]) {
                  _context4.next = 4;
                  break;
                }

                throw new Error('The overlay does not exist.');

              case 4:
                if (this._active) {
                  _context4.next = 8;
                  break;
                }

                throw new Error('The overlay is currently not active.');

              case 8:
                if (!(this._active !== name)) {
                  _context4.next = 10;
                  break;
                }

                throw new Error('Another overlay is currently active.');

              case 10:
                this._overlays[this._active].container.classList.add('hidden');

                this._overlays[this._active].element.classList.add('hidden');

                this._active = null;
                window.removeEventListener('keydown', this._keyDownBound);

              case 14:
              case "end":
                return _context4.stop();
            }
          }
        }, _callee4, this);
      }));

      function close(_x5) {
        return _close.apply(this, arguments);
      }

      return close;
    }()
  }, {
    key: "_keyDown",
    value: function _keyDown(evt) {
      if (this._active && evt.keyCode === 27) {
        this._closeThroughCaller();

        evt.preventDefault();
      }
    }
  }, {
    key: "_closeThroughCaller",
    value: function _closeThroughCaller() {
      if (this._overlays[this._active].callerCloseMethod) {
        this._overlays[this._active].callerCloseMethod();
      }

      if (this._active) {
        this.close(this._active);
      }
    }
  }, {
    key: "active",
    get: function get() {
      return this._active;
    }
  }]);

  return OverlayManager;
}();

exports.OverlayManager = OverlayManager;