mirror of
https://github.com/gyurix1968/guacamole-client.git
synced 2025-10-31 17:13:21 +00:00
Moved guacamole-specific parts into own lib dir
This commit is contained in:
Michael Jumper
601
guacamole/web-client/web/guac-web-lib/javascript/guacamole.js
Normal file
601
guacamole/web-client/web/guac-web-lib/javascript/guacamole.js
Normal file
@@ -0,0 +1,601 @@
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/*
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* Guacamole - Clientless Remote Desktop
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* Copyright (C) 2010 Michael Jumper
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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function GuacamoleClient(display) {
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var STATE_IDLE = 0;
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var STATE_CONNECTING = 1;
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var STATE_WAITING = 2;
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var STATE_CONNECTED = 3;
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var STATE_DISCONNECTING = 4;
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var STATE_DISCONNECTED = 5;
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var currentState = STATE_IDLE;
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var stateChangeHandler = null;
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function setState(state) {
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if (state != currentState) {
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currentState = state;
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if (stateChangeHandler)
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stateChangeHandler(currentState);
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}
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}
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this.setOnStateChangeHandler = function(handler) {
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stateChangeHandler = handler;
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}
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function isConnected() {
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return currentState == STATE_CONNECTED
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|| currentState == STATE_WAITING;
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}
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// Layers
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var background = null;
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var cursor = null;
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var cursorImage = null;
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var cursorHotspotX = 0;
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var cursorHotspotY = 0;
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// FIXME: Make object. Clean up.
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var cursorRectX = 0;
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var cursorRectY = 0;
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var cursorRectW = 0;
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var cursorRectH = 0;
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var cursorHidden = 0;
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function redrawCursor() {
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// Hide hardware cursor
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if (cursorHidden == 0) {
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display.className += " guac-hide-cursor";
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cursorHidden = 1;
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}
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// Erase old cursor
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cursor.clearRect(cursorRectX, cursorRectY, cursorRectW, cursorRectH);
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// Update rect
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cursorRectX = mouse.getX() - cursorHotspotX;
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cursorRectY = mouse.getY() - cursorHotspotY;
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cursorRectW = cursorImage.width;
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cursorRectH = cursorImage.height;
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// Draw new cursor
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cursor.drawImage(cursorRectX, cursorRectY, cursorImage);
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}
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/*****************************************/
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/*** Keyboard ***/
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/*****************************************/
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var keyboard = new GuacamoleKeyboard(document);
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this.disableKeyboard = function() {
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keyboard.setKeyPressedHandler(null);
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keyboard.setKeyReleasedHandler(null);
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};
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this.enableKeyboard = function() {
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keyboard.setKeyPressedHandler(
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function (keysym) {
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sendKeyEvent(1, keysym);
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}
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);
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keyboard.setKeyReleasedHandler(
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function (keysym) {
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sendKeyEvent(0, keysym);
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}
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);
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};
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// Enable keyboard by default
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this.enableKeyboard();
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function sendKeyEvent(pressed, keysym) {
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// Do not send requests if not connected
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if (!isConnected())
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return;
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sendMessage("key:" + keysym + "," + pressed + ";");
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}
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this.pressKey = function(keysym) {
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sendKeyEvent(1, keysym);
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};
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this.releaseKey = function(keysym) {
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sendKeyEvent(0, keysym);
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};
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/*****************************************/
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/*** Mouse ***/
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/*****************************************/
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var mouse = new GuacamoleMouse(display);
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mouse.setButtonPressedHandler(
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function(mouseState) {
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sendMouseState(mouseState);
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}
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);
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mouse.setButtonReleasedHandler(
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function(mouseState) {
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sendMouseState(mouseState);
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}
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);
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mouse.setMovementHandler(
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function(mouseState) {
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// Draw client-side cursor
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if (cursorImage != null) {
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redrawCursor();
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}
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sendMouseState(mouseState);
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}
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);
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function sendMouseState(mouseState) {
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// Do not send requests if not connected
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if (!isConnected())
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return;
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// Build mask
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var buttonMask = 0;
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if (mouseState.getLeft()) buttonMask |= 1;
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if (mouseState.getMiddle()) buttonMask |= 2;
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if (mouseState.getRight()) buttonMask |= 4;
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if (mouseState.getUp()) buttonMask |= 8;
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if (mouseState.getDown()) buttonMask |= 16;
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// Send message
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sendMessage("mouse:" + mouseState.getX() + "," + mouseState.getY() + "," + buttonMask + ";");
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}
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var sendingMessages = 0;
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var outputMessageBuffer = "";
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function sendMessage(message) {
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// Add event to queue, restart send loop if finished.
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outputMessageBuffer += message;
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if (sendingMessages == 0)
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sendPendingMessages();
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}
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function sendPendingMessages() {
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if (outputMessageBuffer.length > 0) {
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sendingMessages = 1;
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var message_xmlhttprequest = new XMLHttpRequest();
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message_xmlhttprequest.open("POST", "inbound");
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message_xmlhttprequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
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message_xmlhttprequest.setRequestHeader("Content-length", outputMessageBuffer.length);
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// Once response received, send next queued event.
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message_xmlhttprequest.onreadystatechange = function() {
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if (message_xmlhttprequest.readyState == 4)
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sendPendingMessages();
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}
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message_xmlhttprequest.send(outputMessageBuffer);
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outputMessageBuffer = ""; // Clear buffer
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}
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else
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sendingMessages = 0;
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}
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/*****************************************/
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/*** Clipboard ***/
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/*****************************************/
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this.setClipboard = function(data) {
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// Do not send requests if not connected
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if (!isConnected())
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return;
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sendMessage("clipboard:" + escapeGuacamoleString(data) + ";");
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}
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function desaturateFilter(data, width, height) {
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for (var i=0; i<data.length; i+=4) {
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// Get RGB values
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var r = data[i];
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var g = data[i+1];
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var b = data[i+2];
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// Desaturate
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var v = Math.max(r, g, b) / 2;
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data[i] = v;
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data[i+1] = v;
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data[i+2] = v;
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}
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}
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var errorHandler = null;
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this.setErrorHandler = function(handler) {
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errorHandler = handler;
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};
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var errorEncountered = 0;
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function showError(error) {
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// Only display first error (avoid infinite error loops)
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if (errorEncountered == 0) {
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errorEncountered = 1;
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disconnect();
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// In case nothing has been rendered yet, use error style
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display.className += " guac-error";
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// Show error by desaturating display
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if (background)
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background.filter(desaturateFilter);
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if (errorHandler)
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errorHandler(error);
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}
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}
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function handleErrors(message) {
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var errors = message.getErrors();
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for (var errorIndex=0; errorIndex<errors.length; errorIndex++)
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showError(errors[errorIndex].getMessage());
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}
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var clipboardHandler = null;
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var requests = 0;
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this.setClipboardHandler = function(handler) {
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clipboardHandler = handler;
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};
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function handleResponse(xmlhttprequest) {
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var nextRequest = null;
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var instructionStart = 0;
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var startIndex = 0;
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function parseResponse() {
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// Start next request as soon as possible
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if (xmlhttprequest.readyState >= 2 && nextRequest == null)
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nextRequest = makeRequest();
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// Parse stream when data is received and when complete.
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if (xmlhttprequest.readyState == 3 ||
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xmlhttprequest.readyState == 4) {
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// Halt on error during request
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if (xmlhttprequest.status == 0) {
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showError("Request canceled by browser.");
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return;
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}
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else if (xmlhttprequest.status != 200) {
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showError("Error during request (HTTP " + xmlhttprequest.status + "): " + xmlhttprequest.statusText);
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return;
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}
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var current = xmlhttprequest.responseText;
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var instructionEnd;
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while ((instructionEnd = current.indexOf(";", startIndex)) != -1) {
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// Start next search at next instruction
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startIndex = instructionEnd+1;
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var instruction = current.substr(instructionStart,
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instructionEnd - instructionStart);
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instructionStart = startIndex;
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var opcodeEnd = instruction.indexOf(":");
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var opcode;
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var parameters;
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if (opcodeEnd == -1) {
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opcode = instruction;
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parameters = new Array();
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}
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else {
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opcode = instruction.substr(0, opcodeEnd);
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parameters = instruction.substr(opcodeEnd+1).split(",");
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}
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// If we're done parsing, handle the next response.
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if (opcode.length == 0) {
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if (isConnected()) {
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delete xmlhttprequest;
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if (nextRequest)
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handleResponse(nextRequest);
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}
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break;
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}
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// Call instruction handler.
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doInstruction(opcode, parameters);
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}
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// Start search at end of string.
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startIndex = current.length;
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delete instruction;
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delete parameters;
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}
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}
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xmlhttprequest.onreadystatechange = parseResponse;
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parseResponse();
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}
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function makeRequest() {
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// Download self
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var xmlhttprequest = new XMLHttpRequest();
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xmlhttprequest.open("POST", "outbound");
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xmlhttprequest.send(null);
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return xmlhttprequest;
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}
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function escapeGuacamoleString(str) {
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var escapedString = "";
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for (var i=0; i<str.length; i++) {
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var c = str.charAt(i);
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if (c == ",")
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escapedString += "\\c";
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else if (c == ";")
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escapedString += "\\s";
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else if (c == "\\")
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||||
escapedString += "\\\\";
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else
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escapedString += c;
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||||
|
||||
}
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||||
|
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return escapedString;
|
||||
|
||||
}
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function unescapeGuacamoleString(str) {
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||||
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var unescapedString = "";
|
||||
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||||
for (var i=0; i<str.length; i++) {
|
||||
|
||||
var c = str.charAt(i);
|
||||
if (c == "\\" && i<str.length-1) {
|
||||
|
||||
var escapeChar = str.charAt(++i);
|
||||
if (escapeChar == "c")
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unescapedString += ",";
|
||||
else if (escapeChar == "s")
|
||||
unescapedString += ";";
|
||||
else if (escapeChar == "\\")
|
||||
unescapedString += "\\";
|
||||
else
|
||||
unescapedString += "\\" + escapeChar;
|
||||
|
||||
}
|
||||
else
|
||||
unescapedString += c;
|
||||
|
||||
}
|
||||
|
||||
return unescapedString;
|
||||
|
||||
}
|
||||
|
||||
var instructionHandlers = {
|
||||
|
||||
"error": function(parameters) {
|
||||
showError(unescapeGuacamoleString(parameters[0]));
|
||||
},
|
||||
|
||||
"name": function(parameters) {
|
||||
document.title = unescapeGuacamoleString(parameters[0]);
|
||||
},
|
||||
|
||||
"clipboard": function(parameters) {
|
||||
clipboardHandler(unescapeGuacamoleString(parameters[0]));
|
||||
},
|
||||
|
||||
"size": function(parameters) {
|
||||
|
||||
var width = parseInt(parameters[0]);
|
||||
var height = parseInt(parameters[1]);
|
||||
|
||||
// Update (set) display size
|
||||
if (display && (background == null || cursor == null)) {
|
||||
display.style.width = width + "px";
|
||||
display.style.height = height + "px";
|
||||
|
||||
background = new Layer(width, height);
|
||||
cursor = new Layer(width, height);
|
||||
|
||||
display.appendChild(background);
|
||||
display.appendChild(cursor);
|
||||
}
|
||||
|
||||
},
|
||||
|
||||
"rect": function(parameters) {
|
||||
|
||||
var x = parseInt(parameters[0]);
|
||||
var y = parseInt(parameters[1]);
|
||||
var w = parseInt(parameters[2]);
|
||||
var h = parseInt(parameters[3]);
|
||||
var color = parameters[4];
|
||||
|
||||
background.drawRect(
|
||||
x,
|
||||
y,
|
||||
w,
|
||||
h,
|
||||
color
|
||||
);
|
||||
|
||||
},
|
||||
|
||||
"png": function(parameters) {
|
||||
|
||||
var x = parseInt(parameters[0]);
|
||||
var y = parseInt(parameters[1]);
|
||||
var data = parameters[2];
|
||||
|
||||
background.draw(
|
||||
x,
|
||||
y,
|
||||
"data:image/png;base64," + data
|
||||
);
|
||||
|
||||
// If received first update, no longer waiting.
|
||||
if (currentState == STATE_WAITING)
|
||||
setState(STATE_CONNECTED);
|
||||
|
||||
},
|
||||
|
||||
"copy": function(parameters) {
|
||||
|
||||
var srcX = parseInt(parameters[0]);
|
||||
var srcY = parseInt(parameters[1]);
|
||||
var srcWidth = parseInt(parameters[2]);
|
||||
var srcHeight = parseInt(parameters[3]);
|
||||
var dstX = parseInt(parameters[4]);
|
||||
var dstY = parseInt(parameters[5]);
|
||||
|
||||
background.copyRect(
|
||||
srcX,
|
||||
srcY,
|
||||
srcWidth,
|
||||
srcHeight,
|
||||
dstX,
|
||||
dstY
|
||||
);
|
||||
|
||||
},
|
||||
|
||||
"cursor": function(parameters) {
|
||||
|
||||
var x = parseInt(parameters[0]);
|
||||
var y = parseInt(parameters[1]);
|
||||
var data = parameters[2];
|
||||
|
||||
// Start cursor image load
|
||||
var image = new Image();
|
||||
image.onload = function() {
|
||||
cursorImage = image;
|
||||
cursorHotspotX = x;
|
||||
cursorHotspotY = y;
|
||||
redrawCursor();
|
||||
};
|
||||
image.src = "data:image/png;base64," + data
|
||||
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
|
||||
function doInstruction(opcode, parameters) {
|
||||
|
||||
var handler = instructionHandlers[opcode];
|
||||
if (handler)
|
||||
handler(parameters);
|
||||
|
||||
}
|
||||
|
||||
|
||||
this.connect = function() {
|
||||
|
||||
setState(STATE_CONNECTING);
|
||||
|
||||
// Start tunnel and connect synchronously
|
||||
var connect_xmlhttprequest = new XMLHttpRequest();
|
||||
connect_xmlhttprequest.open("POST", "connect", false);
|
||||
connect_xmlhttprequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
|
||||
connect_xmlhttprequest.setRequestHeader("Content-length", 0);
|
||||
connect_xmlhttprequest.send(null);
|
||||
|
||||
// Start reading data
|
||||
setState(STATE_WAITING);
|
||||
handleResponse(makeRequest());
|
||||
|
||||
};
|
||||
|
||||
|
||||
function disconnect() {
|
||||
|
||||
// Only attempt disconnection not disconnected.
|
||||
if (currentState != STATE_DISCONNECTED
|
||||
&& currentState != STATE_DISCONNECTING) {
|
||||
|
||||
var message = "disconnect;";
|
||||
setState(STATE_DISCONNECTING);
|
||||
|
||||
// Send disconnect message (synchronously... as necessary until handoff is implemented)
|
||||
var disconnect_xmlhttprequest = new XMLHttpRequest();
|
||||
disconnect_xmlhttprequest.open("POST", "inbound", false);
|
||||
disconnect_xmlhttprequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
|
||||
disconnect_xmlhttprequest.setRequestHeader("Content-length", message.length);
|
||||
disconnect_xmlhttprequest.send(message);
|
||||
|
||||
setState(STATE_DISCONNECTED);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
this.disconnect = disconnect;
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user