mirror of
https://github.com/gyurix1968/guacamole-client.git
synced 2025-09-06 13:17:41 +00:00
Removed old Java client, added new experimental PHP client.
This commit is contained in:
Michael Jumper
270
guacamole/client/javascript/keyboard.js
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270
guacamole/client/javascript/keyboard.js
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/*
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* Guacamole - Pure JavaScript/HTML VNC Client
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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 GuacamoleKeyboard(element) {
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/*****************************************/
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/*** Keyboard Handler ***/
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/*****************************************/
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// Single key state/modifier buffer
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var modShift = 0;
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var modCtrl = 0;
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var modAlt = 0;
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var keydownChar = new Array();
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// ID of routine repeating keystrokes. -1 = not repeating.
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var repeatKeyTimeoutId = -1;
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var repeatKeyIntervalId = -1;
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// Starts repeating keystrokes
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function startRepeat(keySym) {
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repeatKeyIntervalId = setInterval(function() {
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sendKeyReleased(keySym);
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sendKeyPressed(keySym);
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}, 50);
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}
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// Stops repeating keystrokes
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function stopRepeat() {
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if (repeatKeyTimeoutId != -1) clearInterval(repeatKeyTimeoutId);
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if (repeatKeyIntervalId != -1) clearInterval(repeatKeyIntervalId);
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}
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function getKeySymFromKeyIdentifier(shifted, keyIdentifier) {
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var unicodePrefixLocation = keyIdentifier.indexOf("U+");
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if (unicodePrefixLocation >= 0) {
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var hex = keyIdentifier.substring(unicodePrefixLocation+2);
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var codepoint = parseInt(hex, 16);
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var typedCharacter;
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// Convert case if shifted
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if (shifted == 0)
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typedCharacter = String.fromCharCode(codepoint).toLowerCase();
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else
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typedCharacter = String.fromCharCode(codepoint).toUpperCase();
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// Get codepoint
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codepoint = typedCharacter.charCodeAt(0);
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return getKeySymFromCharCode(codepoint);
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}
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return null;
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}
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function getKeySymFromCharCode(keyCode) {
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if (keyCode >= 0x0000 && keyCode <= 0x00FF)
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return keyCode;
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if (keyCode >= 0x0100 && keyCode <= 0x10FFFF)
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return 0x01000000 | keyCode;
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return null;
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}
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function getKeySymFromKeyCode(keyCode) {
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var keysym = null;
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if (modShift == 0) keysym = unshiftedKeySym[keyCode];
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else {
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keysym = shiftedKeySym[keyCode];
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if (keysym == null) keysym = unshiftedKeySym[keyCode];
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}
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return keysym;
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}
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// Sends a single keystroke over the network
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function sendKeyPressed(keysym) {
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if (keysym != null && keyPressedHandler)
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keyPressedHandler(keysym);
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}
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// Sends a single keystroke over the network
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function sendKeyReleased(keysym) {
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if (keysym != null)
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keyReleasedHandler(keysym);
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}
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var KEYDOWN = 1;
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var KEYPRESS = 2;
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var keySymSource = null;
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// When key pressed
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var keydownCode = null;
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element.onkeydown = function(e) {
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// Only intercept if handler set
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if (!keyPressedHandler) return true;
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var keynum;
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if (window.event) keynum = window.event.keyCode;
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else if (e.which) keynum = e.which;
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// Ctrl/Alt/Shift
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if (keynum == 16)
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modShift = 1;
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else if (keynum == 17)
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modCtrl = 1;
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else if (keynum == 18)
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modAlt = 1;
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var keysym = getKeySymFromKeyCode(keynum);
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if (keysym) {
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// Get keysyms and events from KEYDOWN
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keySymSource = KEYDOWN;
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}
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// If modifier keys are held down, and we have keyIdentifier
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else if ((modCtrl == 1 || modAlt == 1) && e.keyIdentifier) {
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// Get keysym from keyIdentifier
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keysym = getKeySymFromKeyIdentifier(modShift, e.keyIdentifier);
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// Get keysyms and events from KEYDOWN
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keySymSource = KEYDOWN;
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}
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else
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// Get keysyms and events from KEYPRESS
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keySymSource = KEYPRESS;
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keydownCode = keynum;
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// Ignore key if we don't need to use KEYPRESS.
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// Send key event here
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if (keySymSource == KEYDOWN) {
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if (keydownChar[keynum] != keysym) {
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// Send event
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keydownChar[keynum] = keysym;
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sendKeyPressed(keysym);
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// Clear old key repeat, if any.
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stopRepeat();
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// Start repeating (if not a modifier key) after a short delay
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if (keynum != 16 && keynum != 17 && keynum != 18)
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repeatKeyTimeoutId = setTimeout(function() { startRepeat(keysym); }, 500);
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}
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return false;
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}
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};
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// When key pressed
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element.onkeypress = function(e) {
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// Only intercept if handler set
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if (!keyPressedHandler) return true;
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if (keySymSource != KEYPRESS) return false;
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var keynum;
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if (window.event) keynum = window.event.keyCode;
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else if (e.which) keynum = e.which;
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var keysym = getKeySymFromCharCode(keynum);
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if (keysym && keydownChar[keynum] != keysym) {
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// If this button already pressed, release first
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var lastKeyDownChar = keydownChar[keydownCode];
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if (lastKeyDownChar)
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sendKeyReleased(lastKeyDownChar);
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keydownChar[keydownCode] = keysym;
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// Clear old key repeat, if any.
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stopRepeat();
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// Send key event
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sendKeyPressed(keysym);
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// Start repeating (if not a modifier key) after a short delay
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repeatKeyTimeoutId = setTimeout(function() { startRepeat(keysym); }, 500);
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}
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return false;
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};
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// When key released
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element.onkeyup = function(e) {
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// Only intercept if handler set
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if (!keyReleasedHandler) return true;
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var keynum;
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if (window.event) keynum = window.event.keyCode;
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else if (e.which) keynum = e.which;
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// Ctrl/Alt/Shift
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if (keynum == 16)
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modShift = 0;
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else if (keynum == 17)
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modCtrl = 0;
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else if (keynum == 18)
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modAlt = 0;
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else
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stopRepeat();
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// Get corresponding character
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var lastKeyDownChar = keydownChar[keynum];
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// Clear character record
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keydownChar[keynum] = null;
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// Send release event
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sendKeyReleased(lastKeyDownChar);
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return false;
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};
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// When focus is lost, clear modifiers.
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var docOnblur = element.onblur;
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element.onblur = function() {
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modAlt = 0;
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modCtrl = 0;
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modShift = 0;
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if (docOnblur != null) docOnblur();
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};
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var keyPressedHandler = null;
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var keyReleasedHandler = null;
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this.setKeyPressedHandler = function(kh) { keyPressedHandler = kh; };
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this.setKeyReleasedHandler = function(kh) { keyReleasedHandler = kh; };
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}
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