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389 lines
14 KiB
389 lines
14 KiB
/*
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* noVNC: HTML5 VNC client
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* Copyright (C) 2012 Joel Martin
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* Copyright (C) 2013 Samuel Mannehed for Cendio AB
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* Licensed under MPL 2.0 or any later version (see LICENSE.txt)
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*/
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/*jslint browser: true, white: false */
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/*global window, Util */
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var Keyboard, Mouse;
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(function () {
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"use strict";
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//
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// Keyboard event handler
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//
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Keyboard = function (defaults) {
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this._keyDownList = []; // List of depressed keys
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// (even if they are happy)
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Util.set_defaults(this, defaults, {
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'target': document,
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'focused': true
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});
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// create the keyboard handler
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this._handler = new KeyEventDecoder(kbdUtil.ModifierSync(),
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VerifyCharModifier( /* jshint newcap: false */
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TrackKeyState(
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EscapeModifiers(this._handleRfbEvent.bind(this))
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)
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)
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); /* jshint newcap: true */
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// keep these here so we can refer to them later
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this._eventHandlers = {
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'keyup': this._handleKeyUp.bind(this),
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'keydown': this._handleKeyDown.bind(this),
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'keypress': this._handleKeyPress.bind(this),
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'blur': this._allKeysUp.bind(this)
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};
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};
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Keyboard.prototype = {
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// private methods
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_handleRfbEvent: function (e) {
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if (this._onKeyPress) {
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Util.Debug("onKeyPress " + (e.type == 'keydown' ? "down" : "up") +
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", keysym: " + e.keysym.keysym + "(" + e.keysym.keyname + ")");
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this._onKeyPress(e.keysym.keysym, e.type == 'keydown');
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}
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},
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_handleKeyDown: function (e) {
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if (!this._focused) { return true; }
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if (this._handler.keydown(e)) {
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// Suppress bubbling/default actions
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Util.stopEvent(e);
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return false;
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} else {
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// Allow the event to bubble and become a keyPress event which
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// will have the character code translated
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return true;
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}
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},
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_handleKeyPress: function (e) {
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if (!this._focused) { return true; }
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if (this._handler.keypress(e)) {
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// Suppress bubbling/default actions
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Util.stopEvent(e);
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return false;
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} else {
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// Allow the event to bubble and become a keyPress event which
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// will have the character code translated
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return true;
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}
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},
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_handleKeyUp: function (e) {
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if (!this._focused) { return true; }
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if (this._handler.keyup(e)) {
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// Suppress bubbling/default actions
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Util.stopEvent(e);
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return false;
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} else {
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// Allow the event to bubble and become a keyPress event which
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// will have the character code translated
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return true;
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}
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},
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_allKeysUp: function () {
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Util.Debug(">> Keyboard.allKeysUp");
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this._handler.releaseAll();
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Util.Debug("<< Keyboard.allKeysUp");
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},
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// Public methods
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grab: function () {
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//Util.Debug(">> Keyboard.grab");
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var c = this._target;
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Util.addEvent(c, 'keydown', this._eventHandlers.keydown);
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Util.addEvent(c, 'keyup', this._eventHandlers.keyup);
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Util.addEvent(c, 'keypress', this._eventHandlers.keypress);
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// Release (key up) if window loses focus
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Util.addEvent(window, 'blur', this._eventHandlers.blur);
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//Util.Debug("<< Keyboard.grab");
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},
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ungrab: function () {
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//Util.Debug(">> Keyboard.ungrab");
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var c = this._target;
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Util.removeEvent(c, 'keydown', this._eventHandlers.keydown);
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Util.removeEvent(c, 'keyup', this._eventHandlers.keyup);
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Util.removeEvent(c, 'keypress', this._eventHandlers.keypress);
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Util.removeEvent(window, 'blur', this._eventHandlers.blur);
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// Release (key up) all keys that are in a down state
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this._allKeysUp();
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//Util.Debug(">> Keyboard.ungrab");
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},
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sync: function (e) {
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this._handler.syncModifiers(e);
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}
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};
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Util.make_properties(Keyboard, [
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['target', 'wo', 'dom'], // DOM element that captures keyboard input
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['focused', 'rw', 'bool'], // Capture and send key events
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['onKeyPress', 'rw', 'func'] // Handler for key press/release
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]);
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//
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// Mouse event handler
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//
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Mouse = function (defaults) {
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this._mouseCaptured = false;
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this._doubleClickTimer = null;
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this._lastTouchPos = null;
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// Configuration attributes
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Util.set_defaults(this, defaults, {
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'target': document,
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'focused': true,
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'scale': 1.0,
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'touchButton': 1
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});
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this._eventHandlers = {
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'mousedown': this._handleMouseDown.bind(this),
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'mouseup': this._handleMouseUp.bind(this),
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'mousemove': this._handleMouseMove.bind(this),
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'mousewheel': this._handleMouseWheel.bind(this),
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'mousedisable': this._handleMouseDisable.bind(this)
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};
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};
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Mouse.prototype = {
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// private methods
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_captureMouse: function () {
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// capturing the mouse ensures we get the mouseup event
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if (this._target.setCapture) {
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this._target.setCapture();
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}
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// some browsers give us mouseup events regardless,
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// so if we never captured the mouse, we can disregard the event
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this._mouseCaptured = true;
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},
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_releaseMouse: function () {
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if (this._target.releaseCapture) {
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this._target.releaseCapture();
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}
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this._mouseCaptured = false;
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},
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_resetDoubleClickTimer: function () {
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this._doubleClickTimer = null;
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},
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_handleMouseButton: function (e, down) {
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if (!this._focused) { return true; }
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if (this._notify) {
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this._notify(e);
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}
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var evt = (e ? e : window.event);
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var pos = Util.getEventPosition(e, this._target, this._scale);
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var bmask;
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if (e.touches || e.changedTouches) {
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// Touch device
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// When two touches occur within 500 ms of each other and are
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// closer than 20 pixels together a double click is triggered.
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if (down == 1) {
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if (this._doubleClickTimer === null) {
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this._lastTouchPos = pos;
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} else {
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clearTimeout(this._doubleClickTimer);
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// When the distance between the two touches is small enough
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// force the position of the latter touch to the position of
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// the first.
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var xs = this._lastTouchPos.x - pos.x;
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var ys = this._lastTouchPos.y - pos.y;
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var d = Math.sqrt((xs * xs) + (ys * ys));
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// The goal is to trigger on a certain physical width, the
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// devicePixelRatio brings us a bit closer but is not optimal.
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if (d < 20 * window.devicePixelRatio) {
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pos = this._lastTouchPos;
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}
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}
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this._doubleClickTimer = setTimeout(this._resetDoubleClickTimer.bind(this), 500);
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}
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bmask = this._touchButton;
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// If bmask is set
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} else if (evt.which) {
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/* everything except IE */
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bmask = 1 << evt.button;
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} else {
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/* IE including 9 */
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bmask = (evt.button & 0x1) + // Left
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(evt.button & 0x2) * 2 + // Right
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(evt.button & 0x4) / 2; // Middle
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}
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if (this._onMouseButton) {
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Util.Debug("onMouseButton " + (down ? "down" : "up") +
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", x: " + pos.x + ", y: " + pos.y + ", bmask: " + bmask);
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this._onMouseButton(pos.x, pos.y, down, bmask);
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}
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Util.stopEvent(e);
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return false;
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},
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_handleMouseDown: function (e) {
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this._captureMouse();
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this._handleMouseButton(e, 1);
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},
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_handleMouseUp: function (e) {
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if (!this._mouseCaptured) { return; }
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this._handleMouseButton(e, 0);
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this._releaseMouse();
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},
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_handleMouseWheel: function (e) {
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if (!this._focused) { return true; }
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if (this._notify) {
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this._notify(e);
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}
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var evt = (e ? e : window.event);
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var pos = Util.getEventPosition(e, this._target, this._scale);
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var wheelData = evt.detail ? evt.detail * -1 : evt.wheelDelta / 40;
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var bmask;
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if (wheelData > 0) {
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bmask = 1 << 3;
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} else {
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bmask = 1 << 4;
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}
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if (this._onMouseButton) {
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this._onMouseButton(pos.x, pos.y, 1, bmask);
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this._onMouseButton(pos.x, pos.y, 0, bmask);
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}
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Util.stopEvent(e);
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return false;
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},
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_handleMouseMove: function (e) {
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if (! this._focused) { return true; }
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if (this._notify) {
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this._notify(e);
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}
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var evt = (e ? e : window.event);
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var pos = Util.getEventPosition(e, this._target, this._scale);
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if (this._onMouseMove) {
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this._onMouseMove(pos.x, pos.y);
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}
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Util.stopEvent(e);
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return false;
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},
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_handleMouseDisable: function (e) {
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if (!this._focused) { return true; }
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var evt = (e ? e : window.event);
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var pos = Util.getEventPosition(e, this._target, this._scale);
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/* Stop propagation if inside canvas area */
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if ((pos.realx >= 0) && (pos.realy >= 0) &&
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(pos.realx < this._target.offsetWidth) &&
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(pos.realy < this._target.offsetHeight)) {
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//Util.Debug("mouse event disabled");
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Util.stopEvent(e);
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return false;
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}
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return true;
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},
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// Public methods
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grab: function () {
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var c = this._target;
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if ('ontouchstart' in document.documentElement) {
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Util.addEvent(c, 'touchstart', this._eventHandlers.mousedown);
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Util.addEvent(window, 'touchend', this._eventHandlers.mouseup);
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Util.addEvent(c, 'touchend', this._eventHandlers.mouseup);
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Util.addEvent(c, 'touchmove', this._eventHandlers.mousemove);
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} else {
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Util.addEvent(c, 'mousedown', this._eventHandlers.mousedown);
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Util.addEvent(window, 'mouseup', this._eventHandlers.mouseup);
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Util.addEvent(c, 'mouseup', this._eventHandlers.mouseup);
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Util.addEvent(c, 'mousemove', this._eventHandlers.mousemove);
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Util.addEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel',
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this._eventHandlers.mousewheel);
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}
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/* Work around right and middle click browser behaviors */
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Util.addEvent(document, 'click', this._eventHandlers.mousedisable);
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Util.addEvent(document.body, 'contextmenu', this._eventHandlers.mousedisable);
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},
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ungrab: function () {
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var c = this._target;
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if ('ontouchstart' in document.documentElement) {
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Util.removeEvent(c, 'touchstart', this._eventHandlers.mousedown);
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Util.removeEvent(window, 'touchend', this._eventHandlers.mouseup);
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Util.removeEvent(c, 'touchend', this._eventHandlers.mouseup);
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Util.removeEvent(c, 'touchmove', this._eventHandlers.mousemove);
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} else {
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Util.removeEvent(c, 'mousedown', this._eventHandlers.mousedown);
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Util.removeEvent(window, 'mouseup', this._eventHandlers.mouseup);
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Util.removeEvent(c, 'mouseup', this._eventHandlers.mouseup);
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Util.removeEvent(c, 'mousemove', this._eventHandlers.mousemove);
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Util.removeEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel',
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this._eventHandlers.mousewheel);
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}
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/* Work around right and middle click browser behaviors */
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Util.removeEvent(document, 'click', this._eventHandlers.mousedisable);
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Util.removeEvent(document.body, 'contextmenu', this._eventHandlers.mousedisable);
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}
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};
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Util.make_properties(Mouse, [
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['target', 'ro', 'dom'], // DOM element that captures mouse input
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['notify', 'ro', 'func'], // Function to call to notify whenever a mouse event is received
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['focused', 'rw', 'bool'], // Capture and send mouse clicks/movement
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['scale', 'rw', 'float'], // Viewport scale factor 0.0 - 1.0
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['onMouseButton', 'rw', 'func'], // Handler for mouse button click/release
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['onMouseMove', 'rw', 'func'], // Handler for mouse movement
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['touchButton', 'rw', 'int'] // Button mask (1, 2, 4) for touch devices (0 means ignore clicks)
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]);
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})();
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