pdfjs-dist/lib/web/hand_tool.js

/* Copyright 2017 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.
 */
'use strict';
var grabToPan = require('./grab_to_pan.js');
var preferences = require('./preferences.js');
var uiUtils = require('./ui_utils.js');
var GrabToPan = grabToPan.GrabToPan;
var Preferences = preferences.Preferences;
var localized = uiUtils.localized;
var HandTool = function HandToolClosure() {
 function HandTool(options) {
  this.container = options.container;
  this.eventBus = options.eventBus;
  this.wasActive = false;
  this.handTool = new GrabToPan({
   element: this.container,
   onActiveChanged: function (isActive) {
    this.eventBus.dispatch('handtoolchanged', { isActive: isActive });
   }.bind(this)
  });
  this.eventBus.on('togglehandtool', this.toggle.bind(this));
  Promise.all([
   localized,
   Preferences.get('enableHandToolOnLoad')
  ]).then(function resolved(values) {
   if (values[1] === true) {
    this.handTool.activate();
   }
  }.bind(this)).catch(function rejected(reason) {
  });
  this.eventBus.on('presentationmodechanged', function (e) {
   if (e.switchInProgress) {
    return;
   }
   if (e.active) {
    this.enterPresentationMode();
   } else {
    this.exitPresentationMode();
   }
  }.bind(this));
 }
 HandTool.prototype = {
  get isActive() {
   return !!this.handTool.active;
  },
  toggle: function HandTool_toggle() {
   this.handTool.toggle();
  },
  enterPresentationMode: function HandTool_enterPresentationMode() {
   if (this.isActive) {
    this.wasActive = true;
    this.handTool.deactivate();
   }
  },
  exitPresentationMode: function HandTool_exitPresentationMode() {
   if (this.wasActive) {
    this.wasActive = false;
    this.handTool.activate();
   }
  }
 };
 return HandTool;
}();
exports.HandTool = HandTool;