Initial Commit
This commit is contained in:
@@ -0,0 +1,161 @@
|
||||
/*
|
||||
* noVNC: HTML5 VNC client
|
||||
* Copyright (C) 2019 The noVNC Authors
|
||||
* Licensed under MPL 2.0 (see LICENSE.txt)
|
||||
*
|
||||
* See README.md for usage and integration instructions.
|
||||
*
|
||||
* Browser feature support detection
|
||||
*/
|
||||
|
||||
import * as Log from './logging.js';
|
||||
|
||||
// Touch detection
|
||||
export let isTouchDevice = ('ontouchstart' in document.documentElement) ||
|
||||
// requried for Chrome debugger
|
||||
(document.ontouchstart !== undefined) ||
|
||||
// required for MS Surface
|
||||
(navigator.maxTouchPoints > 0) ||
|
||||
(navigator.msMaxTouchPoints > 0);
|
||||
window.addEventListener('touchstart', function onFirstTouch() {
|
||||
isTouchDevice = true;
|
||||
window.removeEventListener('touchstart', onFirstTouch, false);
|
||||
}, false);
|
||||
|
||||
|
||||
// The goal is to find a certain physical width, the devicePixelRatio
|
||||
// brings us a bit closer but is not optimal.
|
||||
export let dragThreshold = 10 * (window.devicePixelRatio || 1);
|
||||
|
||||
let _supportsCursorURIs = false;
|
||||
|
||||
try {
|
||||
const target = document.createElement('canvas');
|
||||
target.style.cursor = 'url("data:image/x-icon;base64,AAACAAEACAgAAAIAAgA4AQAAFgAAACgAAAAIAAAAEAAAAAEAIAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////AAAAAAAAAAAAAAAAAAAAAA==") 2 2, default';
|
||||
|
||||
if (target.style.cursor.indexOf("url") === 0) {
|
||||
Log.Info("Data URI scheme cursor supported");
|
||||
_supportsCursorURIs = true;
|
||||
} else {
|
||||
Log.Warn("Data URI scheme cursor not supported");
|
||||
}
|
||||
} catch (exc) {
|
||||
Log.Error("Data URI scheme cursor test exception: " + exc);
|
||||
}
|
||||
|
||||
export const supportsCursorURIs = _supportsCursorURIs;
|
||||
|
||||
let _hasScrollbarGutter = true;
|
||||
try {
|
||||
// Create invisible container
|
||||
const container = document.createElement('div');
|
||||
container.style.visibility = 'hidden';
|
||||
container.style.overflow = 'scroll'; // forcing scrollbars
|
||||
document.body.appendChild(container);
|
||||
|
||||
// Create a div and place it in the container
|
||||
const child = document.createElement('div');
|
||||
container.appendChild(child);
|
||||
|
||||
// Calculate the difference between the container's full width
|
||||
// and the child's width - the difference is the scrollbars
|
||||
const scrollbarWidth = (container.offsetWidth - child.offsetWidth);
|
||||
|
||||
// Clean up
|
||||
container.parentNode.removeChild(container);
|
||||
|
||||
_hasScrollbarGutter = scrollbarWidth != 0;
|
||||
} catch (exc) {
|
||||
Log.Error("Scrollbar test exception: " + exc);
|
||||
}
|
||||
export const hasScrollbarGutter = _hasScrollbarGutter;
|
||||
|
||||
/*
|
||||
* The functions for detection of platforms and browsers below are exported
|
||||
* but the use of these should be minimized as much as possible.
|
||||
*
|
||||
* It's better to use feature detection than platform detection.
|
||||
*/
|
||||
|
||||
export function isMac() {
|
||||
return navigator && !!(/mac/i).exec(navigator.platform);
|
||||
}
|
||||
|
||||
export function isWindows() {
|
||||
return navigator && !!(/win/i).exec(navigator.platform);
|
||||
}
|
||||
|
||||
export function isIOS() {
|
||||
return navigator &&
|
||||
(!!(/ipad/i).exec(navigator.platform) ||
|
||||
!!(/iphone/i).exec(navigator.platform) ||
|
||||
!!(/ipod/i).exec(navigator.platform));
|
||||
}
|
||||
|
||||
export function isSafari() {
|
||||
return navigator && (navigator.userAgent.indexOf('Safari') !== -1 &&
|
||||
navigator.userAgent.indexOf('Chrome') === -1);
|
||||
}
|
||||
|
||||
// Returns IE version number if IE or older Edge browser
|
||||
export function isIE() {
|
||||
var ua = window.navigator.userAgent;
|
||||
|
||||
// Test values; Uncomment to check result &
|
||||
|
||||
// IE 10
|
||||
// ua = 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)';
|
||||
|
||||
// IE 11
|
||||
// ua = 'Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko';
|
||||
|
||||
// Edge 12 (Spartan)
|
||||
// ua = 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.71 Safari/537.36 Edge/12.0';
|
||||
|
||||
// Edge 13
|
||||
// ua = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586';
|
||||
|
||||
var msie = ua.indexOf('MSIE ');
|
||||
var ie_ver = false;
|
||||
if (msie > 0) {
|
||||
// IE 10 or older => return version number
|
||||
ie_ver = parseInt(ua.substring(msie + 5, ua.indexOf('.', msie)), 10);
|
||||
}
|
||||
|
||||
var trident = ua.indexOf('Trident/');
|
||||
if (trident > 0) {
|
||||
// IE 11 => return version number
|
||||
var rv = ua.indexOf('rv:');
|
||||
ie_ver = parseInt(ua.substring(rv + 3, ua.indexOf('.', rv)), 10);
|
||||
}
|
||||
|
||||
var edge = ua.indexOf('Edge/');
|
||||
if (edge > 0) {
|
||||
// Edge (IE 12+) => return version number
|
||||
ie_ver = parseInt(ua.substring(edge + 5, ua.indexOf('.', edge)), 10);
|
||||
}
|
||||
|
||||
return ie_ver;
|
||||
}
|
||||
|
||||
export function isChromiumBased() {
|
||||
return (!!window.chrome);
|
||||
}
|
||||
|
||||
export function isFirefox() {
|
||||
return navigator && !!(/firefox/i).exec(navigator.userAgent);
|
||||
}
|
||||
|
||||
export function supportsBinaryClipboard() {
|
||||
//Safari does support the clipbaord API but has a lot of security restrictions
|
||||
if (isSafari()) { return false; }
|
||||
return (navigator.clipboard && typeof navigator.clipboard.read === "function");
|
||||
}
|
||||
|
||||
export function supportsPointerLock() {
|
||||
//Older versions of edge do support browser lock, but seems to not behave as expected
|
||||
//Disable on browsers that don't fully support or work as expected
|
||||
if (isIOS() || isIE()) { return false; }
|
||||
return (document.exitPointerLock);
|
||||
}
|
||||
|
||||
@@ -0,0 +1,264 @@
|
||||
/*
|
||||
* noVNC: HTML5 VNC client
|
||||
* Copyright (C) 2019 The noVNC Authors
|
||||
* Licensed under MPL 2.0 or any later version (see LICENSE.txt)
|
||||
*/
|
||||
|
||||
import { supportsCursorURIs, isTouchDevice } from './browser.js';
|
||||
|
||||
const needsFallback = !supportsCursorURIs || isTouchDevice;
|
||||
|
||||
export default class Cursor {
|
||||
constructor() {
|
||||
this._target = null;
|
||||
|
||||
this._canvas = document.createElement('canvas');
|
||||
this._canvas.style.position = 'fixed';
|
||||
this._canvas.style.zIndex = '65535';
|
||||
this._canvas.style.pointerEvents = 'none';
|
||||
// Can't use "display" because of Firefox bug #1445997
|
||||
this._canvas.style.visibility = 'hidden';
|
||||
this._useFallback = needsFallback;
|
||||
|
||||
this._position = { x: 0, y: 0 };
|
||||
this._hotSpot = { x: 0, y: 0 };
|
||||
|
||||
this._eventHandlers = {
|
||||
'mouseover': this._handleMouseOver.bind(this),
|
||||
'mouseleave': this._handleMouseLeave.bind(this),
|
||||
'mousemove': this._handleMouseMove.bind(this),
|
||||
'mouseup': this._handleMouseUp.bind(this),
|
||||
};
|
||||
}
|
||||
|
||||
attach(target) {
|
||||
if (this._target) {
|
||||
this.detach();
|
||||
}
|
||||
|
||||
this._target = target;
|
||||
|
||||
|
||||
document.body.appendChild(this._canvas);
|
||||
|
||||
if (needsFallback) {
|
||||
// Only add the event listeners if this will be responsible for
|
||||
// rendering the cursor all the time. Otherwise, the cursor will
|
||||
// only be rendered then the forced emulation is turned on, and
|
||||
// that doesn't require this class to be adjusting the cursor
|
||||
// position.
|
||||
const options = { capture: true, passive: true };
|
||||
this._target.addEventListener('mouseover', this._eventHandlers.mouseover, options);
|
||||
this._target.addEventListener('mouseleave', this._eventHandlers.mouseleave, options);
|
||||
this._target.addEventListener('mousemove', this._eventHandlers.mousemove, options);
|
||||
this._target.addEventListener('mouseup', this._eventHandlers.mouseup, options);
|
||||
}
|
||||
|
||||
this.clear();
|
||||
}
|
||||
|
||||
detach() {
|
||||
if (!this._target) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (needsFallback) {
|
||||
const options = { capture: true, passive: true };
|
||||
this._target.removeEventListener('mouseover', this._eventHandlers.mouseover, options);
|
||||
this._target.removeEventListener('mouseleave', this._eventHandlers.mouseleave, options);
|
||||
this._target.removeEventListener('mousemove', this._eventHandlers.mousemove, options);
|
||||
this._target.removeEventListener('mouseup', this._eventHandlers.mouseup, options);
|
||||
}
|
||||
|
||||
document.body.removeChild(this._canvas);
|
||||
|
||||
this._target = null;
|
||||
}
|
||||
|
||||
change(rgba, hotx, hoty, w, h) {
|
||||
if ((w === 0) || (h === 0)) {
|
||||
this.clear();
|
||||
return;
|
||||
}
|
||||
|
||||
this._position.x = this._position.x + this._hotSpot.x - hotx;
|
||||
this._position.y = this._position.y + this._hotSpot.y - hoty;
|
||||
this._hotSpot.x = hotx;
|
||||
this._hotSpot.y = hoty;
|
||||
|
||||
let ctx = this._canvas.getContext('2d');
|
||||
|
||||
this._canvas.width = w;
|
||||
this._canvas.height = h;
|
||||
|
||||
let img = new ImageData(new Uint8ClampedArray(rgba), w, h);
|
||||
ctx.clearRect(0, 0, w, h);
|
||||
ctx.putImageData(img, 0, 0);
|
||||
|
||||
if (this._useFallback || needsFallback) {
|
||||
this._updatePosition();
|
||||
}
|
||||
if (!needsFallback) {
|
||||
let url = this._canvas.toDataURL();
|
||||
this._target.style.cursor = 'url(' + url + ')' + hotx + ' ' + hoty + ', default';
|
||||
}
|
||||
}
|
||||
|
||||
clear() {
|
||||
this._target.style.cursor = 'none';
|
||||
this._canvas.width = 0;
|
||||
this._canvas.height = 0;
|
||||
this._position.x = this._position.x + this._hotSpot.x;
|
||||
this._position.y = this._position.y + this._hotSpot.y;
|
||||
this._hotSpot.x = 0;
|
||||
this._hotSpot.y = 0;
|
||||
}
|
||||
|
||||
// Mouse events might be emulated, this allows
|
||||
// moving the cursor in such cases
|
||||
move(clientX, clientY) {
|
||||
if (!this._useFallback) {
|
||||
return;
|
||||
}
|
||||
// clientX/clientY are relative the _visual viewport_,
|
||||
// but our position is relative the _layout viewport_,
|
||||
// so try to compensate when we can
|
||||
if (window.visualViewport) {
|
||||
this._position.x = clientX + window.visualViewport.offsetLeft;
|
||||
this._position.y = clientY + window.visualViewport.offsetTop;
|
||||
} else {
|
||||
this._position.x = clientX;
|
||||
this._position.y = clientY;
|
||||
}
|
||||
this._updatePosition();
|
||||
let target = document.elementFromPoint(clientX, clientY);
|
||||
this._updateVisibility(target);
|
||||
}
|
||||
|
||||
// Force the use of cursor emulation. This is needed when the pointer lock
|
||||
// is in use, since the browser will not render the cursor.
|
||||
setEmulateCursor(emulate) {
|
||||
if (needsFallback) {
|
||||
// We need to use the fallback all the time, so we shouldn't update
|
||||
// the fallback flag.
|
||||
return;
|
||||
}
|
||||
this._useFallback = emulate;
|
||||
if (this._useFallback) {
|
||||
this._showCursor();
|
||||
} else {
|
||||
this._hideCursor();
|
||||
}
|
||||
}
|
||||
|
||||
_handleMouseOver(event) {
|
||||
// This event could be because we're entering the target, or
|
||||
// moving around amongst its sub elements. Let the move handler
|
||||
// sort things out.
|
||||
this._handleMouseMove(event);
|
||||
}
|
||||
|
||||
_handleMouseLeave(event) {
|
||||
// Check if we should show the cursor on the element we are leaving to
|
||||
this._updateVisibility(event.relatedTarget);
|
||||
}
|
||||
|
||||
_handleMouseMove(event) {
|
||||
this._updateVisibility(event.target);
|
||||
|
||||
this._position.x = event.clientX - this._hotSpot.x;
|
||||
this._position.y = event.clientY - this._hotSpot.y;
|
||||
|
||||
this._updatePosition();
|
||||
}
|
||||
|
||||
_handleMouseUp(event) {
|
||||
// We might get this event because of a drag operation that
|
||||
// moved outside of the target. Check what's under the cursor
|
||||
// now and adjust visibility based on that.
|
||||
let target = document.elementFromPoint(event.clientX, event.clientY);
|
||||
this._updateVisibility(target);
|
||||
|
||||
// Captures end with a mouseup but we can't know the event order of
|
||||
// mouseup vs releaseCapture.
|
||||
//
|
||||
// In the cases when releaseCapture comes first, the code above is
|
||||
// enough.
|
||||
//
|
||||
// In the cases when the mouseup comes first, we need wait for the
|
||||
// browser to flush all events and then check again if the cursor
|
||||
// should be visible.
|
||||
if (this._captureIsActive()) {
|
||||
window.setTimeout(() => {
|
||||
// We might have detached at this point
|
||||
if (!this._target) {
|
||||
return;
|
||||
}
|
||||
// Refresh the target from elementFromPoint since queued events
|
||||
// might have altered the DOM
|
||||
target = document.elementFromPoint(event.clientX,
|
||||
event.clientY);
|
||||
this._updateVisibility(target);
|
||||
}, 0);
|
||||
}
|
||||
}
|
||||
|
||||
_showCursor() {
|
||||
if (this._canvas.style.visibility === 'hidden') {
|
||||
this._canvas.style.visibility = '';
|
||||
}
|
||||
}
|
||||
|
||||
_hideCursor() {
|
||||
if (this._canvas.style.visibility !== 'hidden') {
|
||||
this._canvas.style.visibility = 'hidden';
|
||||
}
|
||||
}
|
||||
|
||||
// Should we currently display the cursor?
|
||||
// (i.e. are we over the target, or a child of the target without a
|
||||
// different cursor set)
|
||||
_shouldShowCursor(target) {
|
||||
if (!target) {
|
||||
return false;
|
||||
}
|
||||
// Easy case
|
||||
if (target === this._target) {
|
||||
return true;
|
||||
}
|
||||
// Other part of the DOM?
|
||||
if (!this._target.contains(target)) {
|
||||
return false;
|
||||
}
|
||||
// Has the child its own cursor?
|
||||
// FIXME: How can we tell that a sub element has an
|
||||
// explicit "cursor: none;"?
|
||||
if (window.getComputedStyle(target).cursor !== 'none') {
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
_updateVisibility(target) {
|
||||
// When the cursor target has capture we want to show the cursor.
|
||||
// So, if a capture is active - look at the captured element instead.
|
||||
if (this._captureIsActive()) {
|
||||
target = document.captureElement;
|
||||
}
|
||||
if (this._shouldShowCursor(target)) {
|
||||
this._showCursor();
|
||||
} else {
|
||||
this._hideCursor();
|
||||
}
|
||||
}
|
||||
|
||||
_updatePosition() {
|
||||
this._canvas.style.left = this._position.x + "px";
|
||||
this._canvas.style.top = this._position.y + "px";
|
||||
}
|
||||
|
||||
_captureIsActive() {
|
||||
return document.captureElement &&
|
||||
document.documentElement.contains(document.captureElement);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,32 @@
|
||||
/*
|
||||
* noVNC: HTML5 VNC client
|
||||
* Copyright (C) 2020 The noVNC Authors
|
||||
* Licensed under MPL 2.0 (see LICENSE.txt)
|
||||
*
|
||||
* See README.md for usage and integration instructions.
|
||||
*/
|
||||
|
||||
/*
|
||||
* HTML element utility functions
|
||||
*/
|
||||
|
||||
export function clientToElement(x, y, elem) {
|
||||
const bounds = elem.getBoundingClientRect();
|
||||
let pos = { x: 0, y: 0 };
|
||||
// Clip to target bounds
|
||||
if (x < bounds.left) {
|
||||
pos.x = 0;
|
||||
} else if (x >= bounds.right) {
|
||||
pos.x = bounds.width - 1;
|
||||
} else {
|
||||
pos.x = x - bounds.left;
|
||||
}
|
||||
if (y < bounds.top) {
|
||||
pos.y = 0;
|
||||
} else if (y >= bounds.bottom) {
|
||||
pos.y = bounds.height - 1;
|
||||
} else {
|
||||
pos.y = y - bounds.top;
|
||||
}
|
||||
return pos;
|
||||
}
|
||||
@@ -0,0 +1,138 @@
|
||||
/*
|
||||
* noVNC: HTML5 VNC client
|
||||
* Copyright (C) 2018 The noVNC Authors
|
||||
* Licensed under MPL 2.0 (see LICENSE.txt)
|
||||
*
|
||||
* See README.md for usage and integration instructions.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Cross-browser event and position routines
|
||||
*/
|
||||
|
||||
export function getPointerEvent(e) {
|
||||
return e.changedTouches ? e.changedTouches[0] : e.touches ? e.touches[0] : e;
|
||||
}
|
||||
|
||||
export function stopEvent(e) {
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
}
|
||||
|
||||
// Emulate Element.setCapture() when not supported
|
||||
let _captureRecursion = false;
|
||||
let _elementForUnflushedEvents = null;
|
||||
document.captureElement = null;
|
||||
function _captureProxy(e) {
|
||||
// Recursion protection as we'll see our own event
|
||||
if (_captureRecursion) return;
|
||||
|
||||
// Clone the event as we cannot dispatch an already dispatched event
|
||||
const newEv = new e.constructor(e.type, e);
|
||||
|
||||
_captureRecursion = true;
|
||||
if (document.captureElement) {
|
||||
document.captureElement.dispatchEvent(newEv);
|
||||
} else {
|
||||
_elementForUnflushedEvents.dispatchEvent(newEv);
|
||||
}
|
||||
_captureRecursion = false;
|
||||
|
||||
// Avoid double events
|
||||
e.stopPropagation();
|
||||
|
||||
// Respect the wishes of the redirected event handlers
|
||||
if (newEv.defaultPrevented) {
|
||||
e.preventDefault();
|
||||
}
|
||||
|
||||
// Implicitly release the capture on button release
|
||||
if (e.type === "mouseup") {
|
||||
releaseCapture();
|
||||
}
|
||||
}
|
||||
|
||||
// Follow cursor style of target element
|
||||
function _capturedElemChanged() {
|
||||
const proxyElem = document.getElementById("noVNC_mouse_capture_elem");
|
||||
proxyElem.style.cursor = window.getComputedStyle(document.captureElement).cursor;
|
||||
}
|
||||
|
||||
const _captureObserver = new MutationObserver(_capturedElemChanged);
|
||||
|
||||
export function setCapture(target) {
|
||||
if (target.setCapture) {
|
||||
|
||||
target.setCapture();
|
||||
document.captureElement = target;
|
||||
} else {
|
||||
// Release any existing capture in case this method is
|
||||
// called multiple times without coordination
|
||||
releaseCapture();
|
||||
|
||||
let proxyElem = document.getElementById("noVNC_mouse_capture_elem");
|
||||
|
||||
if (proxyElem === null) {
|
||||
proxyElem = document.createElement("div");
|
||||
proxyElem.id = "noVNC_mouse_capture_elem";
|
||||
proxyElem.style.position = "fixed";
|
||||
proxyElem.style.top = "0px";
|
||||
proxyElem.style.left = "0px";
|
||||
proxyElem.style.width = "100%";
|
||||
proxyElem.style.height = "100%";
|
||||
proxyElem.style.zIndex = 10000;
|
||||
proxyElem.style.display = "none";
|
||||
document.body.appendChild(proxyElem);
|
||||
|
||||
// This is to make sure callers don't get confused by having
|
||||
// our blocking element as the target
|
||||
proxyElem.addEventListener('contextmenu', _captureProxy);
|
||||
|
||||
proxyElem.addEventListener('mousemove', _captureProxy);
|
||||
proxyElem.addEventListener('mouseup', _captureProxy);
|
||||
}
|
||||
|
||||
document.captureElement = target;
|
||||
|
||||
// Track cursor and get initial cursor
|
||||
_captureObserver.observe(target, {attributes: true});
|
||||
_capturedElemChanged();
|
||||
|
||||
proxyElem.style.display = "";
|
||||
|
||||
// We listen to events on window in order to keep tracking if it
|
||||
// happens to leave the viewport
|
||||
window.addEventListener('mousemove', _captureProxy);
|
||||
window.addEventListener('mouseup', _captureProxy);
|
||||
}
|
||||
}
|
||||
|
||||
export function releaseCapture() {
|
||||
if (document.releaseCapture) {
|
||||
|
||||
document.releaseCapture();
|
||||
document.captureElement = null;
|
||||
|
||||
} else {
|
||||
if (!document.captureElement) {
|
||||
return;
|
||||
}
|
||||
|
||||
// There might be events already queued. The event proxy needs
|
||||
// access to the captured element for these queued events.
|
||||
// E.g. contextmenu (right-click) in Microsoft Edge
|
||||
//
|
||||
// Before removing the capturedElem pointer we save it to a
|
||||
// temporary variable that the unflushed events can use.
|
||||
_elementForUnflushedEvents = document.captureElement;
|
||||
document.captureElement = null;
|
||||
|
||||
_captureObserver.disconnect();
|
||||
|
||||
const proxyElem = document.getElementById("noVNC_mouse_capture_elem");
|
||||
proxyElem.style.display = "none";
|
||||
|
||||
window.removeEventListener('mousemove', _captureProxy);
|
||||
window.removeEventListener('mouseup', _captureProxy);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,35 @@
|
||||
/*
|
||||
* noVNC: HTML5 VNC client
|
||||
* Copyright (C) 2019 The noVNC Authors
|
||||
* Licensed under MPL 2.0 (see LICENSE.txt)
|
||||
*
|
||||
* See README.md for usage and integration instructions.
|
||||
*/
|
||||
|
||||
export default class EventTargetMixin {
|
||||
constructor() {
|
||||
this._listeners = new Map();
|
||||
}
|
||||
|
||||
addEventListener(type, callback) {
|
||||
if (!this._listeners.has(type)) {
|
||||
this._listeners.set(type, new Set());
|
||||
}
|
||||
this._listeners.get(type).add(callback);
|
||||
}
|
||||
|
||||
removeEventListener(type, callback) {
|
||||
if (this._listeners.has(type)) {
|
||||
this._listeners.get(type).delete(callback);
|
||||
}
|
||||
}
|
||||
|
||||
dispatchEvent(event) {
|
||||
if (!this._listeners.has(event.type)) {
|
||||
return true;
|
||||
}
|
||||
this._listeners.get(event.type)
|
||||
.forEach(callback => callback.call(this, event));
|
||||
return !event.defaultPrevented;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,60 @@
|
||||
/*
|
||||
* noVNC: HTML5 VNC client
|
||||
* Copyright (C) 2020 The noVNC Authors
|
||||
* Licensed under MPL 2.0 (see LICENSE.txt)
|
||||
*
|
||||
* See README.md for usage and integration instructions.
|
||||
*/
|
||||
|
||||
export function toUnsigned32bit(toConvert) {
|
||||
return toConvert >>> 0;
|
||||
}
|
||||
|
||||
export function toSigned32bit(toConvert) {
|
||||
return toConvert | 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Converts a signed 32bit integer to a signed 16bit int
|
||||
* Uses second most significant bit to represent it is relative
|
||||
*/
|
||||
export function toSignedRelative16bit(toConvert) {
|
||||
// TODO: move these so they are not computed with every func call
|
||||
var negmask16 = 1 << 15;
|
||||
var negmask32 = 1 << 31;
|
||||
var relmask16 = 1 << 14;
|
||||
|
||||
var converted16 = toConvert | 0;
|
||||
|
||||
// number is negative
|
||||
if ((toConvert & negmask32) != 0) {
|
||||
// clear the 32bit negative bit
|
||||
// not neccessary because the last 16bits will get dropped anyway
|
||||
converted16 *= -1;
|
||||
|
||||
// set the 16bit negative bit
|
||||
converted16 |= negmask16;
|
||||
// set the relative bit
|
||||
converted16 |= relmask16;
|
||||
} else {
|
||||
// set the relative bit
|
||||
converted16 |= relmask16;
|
||||
}
|
||||
|
||||
return converted16;
|
||||
}
|
||||
|
||||
/* Fast hashing function with low entropy */
|
||||
export function hashUInt8Array(data) {
|
||||
if (typeof data === "string") {
|
||||
data = [...data].map(character => character.charCodeAt(0));
|
||||
}
|
||||
|
||||
let h = 0;
|
||||
|
||||
for (let i = 0; i < data.length; i++) {
|
||||
h = Math.imul(31, h) + data[i] | 0;
|
||||
}
|
||||
|
||||
return h;
|
||||
}
|
||||
@@ -0,0 +1,56 @@
|
||||
/*
|
||||
* noVNC: HTML5 VNC client
|
||||
* Copyright (C) 2019 The noVNC Authors
|
||||
* Licensed under MPL 2.0 (see LICENSE.txt)
|
||||
*
|
||||
* See README.md for usage and integration instructions.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Logging/debug routines
|
||||
*/
|
||||
|
||||
let _logLevel = 'warn';
|
||||
|
||||
let Debug = () => {};
|
||||
let Info = () => {};
|
||||
let Warn = () => {};
|
||||
let Error = () => {};
|
||||
|
||||
export function initLogging(level) {
|
||||
if (typeof level === 'undefined') {
|
||||
level = _logLevel;
|
||||
} else {
|
||||
_logLevel = level;
|
||||
}
|
||||
|
||||
Debug = Info = Warn = Error = () => {};
|
||||
|
||||
if (typeof window.console !== "undefined") {
|
||||
/* eslint-disable no-console, no-fallthrough */
|
||||
switch (level) {
|
||||
case 'debug':
|
||||
Debug = console.debug.bind(window.console);
|
||||
case 'info':
|
||||
Info = console.info.bind(window.console);
|
||||
case 'warn':
|
||||
Warn = console.warn.bind(window.console);
|
||||
case 'error':
|
||||
Error = console.error.bind(window.console);
|
||||
case 'none':
|
||||
break;
|
||||
default:
|
||||
throw new window.Error("invalid logging type '" + level + "'");
|
||||
}
|
||||
/* eslint-enable no-console, no-fallthrough */
|
||||
}
|
||||
}
|
||||
|
||||
export function getLogging() {
|
||||
return _logLevel;
|
||||
}
|
||||
|
||||
export { Debug, Info, Warn, Error };
|
||||
|
||||
// Initialize logging level
|
||||
initLogging();
|
||||
@@ -0,0 +1,28 @@
|
||||
/*
|
||||
* noVNC: HTML5 VNC client
|
||||
* Copyright (C) 2019 The noVNC Authors
|
||||
* Licensed under MPL 2.0 (see LICENSE.txt)
|
||||
*
|
||||
* See README.md for usage and integration instructions.
|
||||
*/
|
||||
|
||||
// Decode from UTF-8
|
||||
export function decodeUTF8(utf8string, allowLatin1=false) {
|
||||
try {
|
||||
return decodeURIComponent(escape(utf8string));
|
||||
} catch (e) {
|
||||
if (e instanceof URIError) {
|
||||
if (allowLatin1) {
|
||||
// If we allow Latin1 we can ignore any decoding fails
|
||||
// and in these cases return the original string
|
||||
return utf8string;
|
||||
}
|
||||
}
|
||||
throw e;
|
||||
}
|
||||
}
|
||||
|
||||
// Encode to UTF-8
|
||||
export function encodeUTF8(DOMString) {
|
||||
return unescape(encodeURIComponent(DOMString));
|
||||
}
|
||||
Reference in New Issue
Block a user