spb/admin-ka

1"use strict";23Object.defineProperty(exports, "__esModule", {4  value: true5});6exports.getPointerEvent = getPointerEvent;7exports.releaseCapture = releaseCapture;8exports.setCapture = setCapture;9exports.stopEvent = stopEvent;10/*11 * noVNC: HTML5 VNC client12 * Copyright (C) 2018 The noVNC authors13 * Licensed under MPL 2.0 (see LICENSE.txt)14 *15 * See README.md for usage and integration instructions.16 */1718/*19 * Cross-browser event and position routines20 */2122function getPointerEvent(e) {23  return e.changedTouches ? e.changedTouches[0] : e.touches ? e.touches[0] : e;24}25function stopEvent(e) {26  e.stopPropagation();27  e.preventDefault();28}2930// Emulate Element.setCapture() when not supported31var _captureRecursion = false;32var _elementForUnflushedEvents = null;33document.captureElement = null;34function _captureProxy(e) {35  // Recursion protection as we'll see our own event36  if (_captureRecursion) return;3738  // Clone the event as we cannot dispatch an already dispatched event39  var newEv = new e.constructor(e.type, e);40  _captureRecursion = true;41  if (document.captureElement) {42    document.captureElement.dispatchEvent(newEv);43  } else {44    _elementForUnflushedEvents.dispatchEvent(newEv);45  }46  _captureRecursion = false;4748  // Avoid double events49  e.stopPropagation();5051  // Respect the wishes of the redirected event handlers52  if (newEv.defaultPrevented) {53    e.preventDefault();54  }5556  // Implicitly release the capture on button release57  if (e.type === "mouseup") {58    releaseCapture();59  }60}6162// Follow cursor style of target element63function _capturedElemChanged() {64  var proxyElem = document.getElementById("noVNC_mouse_capture_elem");65  proxyElem.style.cursor = window.getComputedStyle(document.captureElement).cursor;66}67var _captureObserver = new MutationObserver(_capturedElemChanged);68function setCapture(target) {69  if (target.setCapture) {70    target.setCapture();71    document.captureElement = target;72  } else {73    // Release any existing capture in case this method is74    // called multiple times without coordination75    releaseCapture();76    var proxyElem = document.getElementById("noVNC_mouse_capture_elem");77    if (proxyElem === null) {78      proxyElem = document.createElement("div");79      proxyElem.id = "noVNC_mouse_capture_elem";80      proxyElem.style.position = "fixed";81      proxyElem.style.top = "0px";82      proxyElem.style.left = "0px";83      proxyElem.style.width = "100%";84      proxyElem.style.height = "100%";85      proxyElem.style.zIndex = 10000;86      proxyElem.style.display = "none";87      document.body.appendChild(proxyElem);8889      // This is to make sure callers don't get confused by having90      // our blocking element as the target91      proxyElem.addEventListener('contextmenu', _captureProxy);92      proxyElem.addEventListener('mousemove', _captureProxy);93      proxyElem.addEventListener('mouseup', _captureProxy);94    }95    document.captureElement = target;9697    // Track cursor and get initial cursor98    _captureObserver.observe(target, {99      attributes: true100    });101    _capturedElemChanged();102    proxyElem.style.display = "";103104    // We listen to events on window in order to keep tracking if it105    // happens to leave the viewport106    window.addEventListener('mousemove', _captureProxy);107    window.addEventListener('mouseup', _captureProxy);108  }109}110function releaseCapture() {111  if (document.releaseCapture) {112    document.releaseCapture();113    document.captureElement = null;114  } else {115    if (!document.captureElement) {116      return;117    }118119    // There might be events already queued. The event proxy needs120    // access to the captured element for these queued events.121    // E.g. contextmenu (right-click) in Microsoft Edge122    //123    // Before removing the capturedElem pointer we save it to a124    // temporary variable that the unflushed events can use.125    _elementForUnflushedEvents = document.captureElement;126    document.captureElement = null;127    _captureObserver.disconnect();128    var proxyElem = document.getElementById("noVNC_mouse_capture_elem");129    proxyElem.style.display = "none";130    window.removeEventListener('mousemove', _captureProxy);131    window.removeEventListener('mouseup', _captureProxy);132  }133}