f2538f337d
wswrapper:
Getting the wswrapper.c LD_PRELOAD model working has turned out to
involve too many dark corners of the glibc/POSIX file descriptor
space. I realized that 95% of what I want can be accomplished by
adding a "wrap command" mode to wsproxy.
The code is still there for now, but consider it experimental at
best. Minor fix to dup2 and add dup and dup3 logging.
wsproxy Wrap Command:
In wsproxy wrap command mode, a command line is specified instead
of a target address and port. wsproxy then uses a much simpler
LD_PRELOAD library, rebind.so, to move intercept any bind() system
calls made by the program. If the bind() call is for the wsproxy
listen port number then the real bind() system call is issued for
an alternate (free high) port on loopback/localhost. wsproxy then
forwards from the listen address/port to the moved port.
The --wrap-mode argument takes three options that determine the
behavior of wsproxy when the wrapped command returns an exit code
(exit or daemonizing): ignore, exit, respawn.
For example, this runs vncserver on turns port 5901 into
a WebSockets port (rebind.so must be built first):
./utils/wsproxy.py --wrap-mode=ignore 5901 -- vncserver :1
The vncserver command backgrounds itself so the wrap mode is set
to "ignore" so that wsproxy keeps running even after it receives
an exit code from vncserver.
wstelnet:
To demonstrate the wrap command mode, I added WebSockets telnet
client.
For example, this runs telnetd (krb5-telnetd) on turns port 2023
into a WebSockets port (using "respawn" mode since telnetd exits
after each connection closes):
sudo ./utils/wsproxy.py --wrap-mode=respawn 2023 -- telnetd -debug 2023
Then the utils/wstelnet.html page can be used to connect to the
telnetd server on port 2023. The telnet client includes VT100.js
(from http://code.google.com/p/sshconsole) which handles the
terminal emulation and rendering.
rebind:
The rebind LD_PRELOAD library is used by wsproxy in wrap command
mode to intercept bind() system calls and move the port to
a different port on loopback/localhost. The rebind.so library can
be built by running make in the utils directory.
The rebind library can be used separately from wsproxy by setting
the REBIND_OLD_PORT and REBIND_NEW_PORT environment variables
prior to executing a command. For example:
export export REBIND_PORT_OLD="23"
export export REBIND_PORT_NEW="65023"
LD_PRELOAD=./rebind.so telnetd -debug 23
Alternately, the rebind script does the same thing:
rebind 23 65023 telnetd -debug 23
Other changes/notes:
- wsproxy no longer daemonizes by default. Remove -f/--foreground
option and add -D/--deamon option.
- When wsproxy is used to wrap a command in "respawn" mode, the
command will not be respawn more often than 3 times within 10
seconds.
- Move getKeysym routine out of Canvas object so that it can be called
directly.
784 lines
24 KiB
JavaScript
784 lines
24 KiB
JavaScript
/*
|
|
* noVNC: HTML5 VNC client
|
|
* Copyright (C) 2010 Joel Martin
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* Licensed under LGPL-3 (see LICENSE.txt)
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*
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* See README.md for usage and integration instructions.
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*/
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"use strict";
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/*jslint browser: true, white: false, bitwise: false */
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/*global window, Util, Base64 */
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|
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Canvas = function(conf) {
|
|
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conf = conf || {}; // Configuration
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var that = {}, // Public API interface
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|
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// Private Canvas namespace variables
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c_forceCanvas = false,
|
|
|
|
c_width = 0,
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c_height = 0,
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|
|
|
c_prevStyle = "",
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|
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c_keyPress = null,
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c_mouseButton = null,
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c_mouseMove = null,
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|
|
|
c_webkit_bug = false,
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c_flush_timer = null;
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|
|
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// Configuration settings
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function cdef(v, type, defval, desc) {
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Util.conf_default(conf, that, v, type, defval, desc); }
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// Capability settings, default can be overridden
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cdef('prefer_js', 'raw', null, 'Prefer Javascript over canvas methods');
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cdef('cursor_uri', 'raw', null, 'Can we render cursor using data URI');
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|
|
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cdef('target', 'dom', null, 'Canvas element for VNC viewport');
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cdef('focusContainer', 'dom', document, 'DOM element that traps keyboard input');
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cdef('true_color', 'bool', true, 'Request true color pixel data');
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cdef('focused', 'bool', true, 'Capture and send key strokes');
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cdef('colourMap', 'raw', [], 'Colour map array (not true color)');
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cdef('scale', 'float', 1, 'VNC viewport scale factor');
|
|
|
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cdef('render_mode', 'str', '', 'Canvas rendering mode (read-only)');
|
|
|
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// Override some specific getters/setters
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that.set_prefer_js = function(val) {
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if (val && c_forceCanvas) {
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Util.Warn("Preferring Javascript to Canvas ops is not supported");
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return false;
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}
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conf.prefer_js = val;
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return true;
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};
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|
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that.get_colourMap = function(idx) {
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if (typeof idx === 'undefined') {
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return conf.colourMap;
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} else {
|
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return conf.colourMap[idx];
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}
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};
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that.set_colourMap = function(val, idx) {
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if (typeof idx === 'undefined') {
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conf.colourMap = val;
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} else {
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conf.colourMap[idx] = val;
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}
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};
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that.set_render_mode = function () { throw("render_mode is read-only"); };
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|
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// Add some other getters/setters
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that.get_width = function() {
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return c_width;
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};
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that.get_height = function() {
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return c_height;
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};
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|
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//
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// Private functions
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//
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// Create the public API interface
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function constructor() {
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Util.Debug(">> Canvas.init");
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var c, ctx, func, origfunc, imgTest, tval, i, curDat, curSave,
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has_imageData = false, UE = Util.Engine;
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if (! conf.target) { throw("target must be set"); }
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if (typeof conf.target === 'string') {
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throw("target must be a DOM element");
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}
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c = conf.target;
|
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if (! c.getContext) { throw("no getContext method"); }
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if (! conf.ctx) { conf.ctx = c.getContext('2d'); }
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ctx = conf.ctx;
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Util.Debug("User Agent: " + navigator.userAgent);
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if (UE.gecko) { Util.Debug("Browser: gecko " + UE.gecko); }
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if (UE.webkit) { Util.Debug("Browser: webkit " + UE.webkit); }
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if (UE.trident) { Util.Debug("Browser: trident " + UE.trident); }
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if (UE.presto) { Util.Debug("Browser: presto " + UE.presto); }
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that.clear();
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/*
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* Determine browser Canvas feature support
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* and select fastest rendering methods
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*/
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tval = 0;
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try {
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imgTest = ctx.getImageData(0, 0, 1,1);
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imgTest.data[0] = 123;
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imgTest.data[3] = 255;
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ctx.putImageData(imgTest, 0, 0);
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tval = ctx.getImageData(0, 0, 1, 1).data[0];
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if (tval === 123) {
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has_imageData = true;
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}
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} catch (exc1) {}
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if (has_imageData) {
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Util.Info("Canvas supports imageData");
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c_forceCanvas = false;
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if (ctx.createImageData) {
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// If it's there, it's faster
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Util.Info("Using Canvas createImageData");
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conf.render_mode = "createImageData rendering";
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that.imageData = that.imageDataCreate;
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} else if (ctx.getImageData) {
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// I think this is mostly just Opera
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Util.Info("Using Canvas getImageData");
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conf.render_mode = "getImageData rendering";
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that.imageData = that.imageDataGet;
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}
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Util.Info("Prefering javascript operations");
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if (conf.prefer_js === null) {
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conf.prefer_js = true;
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}
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that.rgbxImage = that.rgbxImageData;
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that.cmapImage = that.cmapImageData;
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} else {
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Util.Warn("Canvas lacks imageData, using fillRect (slow)");
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conf.render_mode = "fillRect rendering (slow)";
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c_forceCanvas = true;
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conf.prefer_js = false;
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that.rgbxImage = that.rgbxImageFill;
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that.cmapImage = that.cmapImageFill;
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}
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if (UE.webkit && UE.webkit >= 534.7 && UE.webkit <= 534.9) {
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// Workaround WebKit canvas rendering bug #46319
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conf.render_mode += ", webkit bug workaround";
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Util.Debug("Working around WebKit bug #46319");
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c_webkit_bug = true;
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for (func in {"fillRect":1, "copyImage":1, "rgbxImage":1,
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"cmapImage":1, "blitStringImage":1}) {
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that[func] = (function() {
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var myfunc = that[func]; // Save original function
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//Util.Debug("Wrapping " + func);
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return function() {
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myfunc.apply(this, arguments);
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if (!c_flush_timer) {
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c_flush_timer = setTimeout(that.flush, 100);
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}
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};
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})();
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}
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}
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/*
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* Determine browser support for setting the cursor via data URI
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* scheme
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*/
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curDat = [];
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for (i=0; i < 8 * 8 * 4; i += 1) {
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curDat.push(255);
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}
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try {
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curSave = c.style.cursor;
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that.changeCursor(curDat, curDat, 2, 2, 8, 8);
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if (c.style.cursor) {
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if (conf.cursor_uri === null) {
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conf.cursor_uri = true;
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}
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Util.Info("Data URI scheme cursor supported");
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} else {
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if (conf.cursor_uri === null) {
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conf.cursor_uri = false;
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}
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Util.Warn("Data URI scheme cursor not supported");
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}
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c.style.cursor = curSave;
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} catch (exc2) {
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Util.Error("Data URI scheme cursor test exception: " + exc2);
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conf.cursor_uri = false;
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}
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conf.focused = true;
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Util.Debug("<< Canvas.init");
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return that ;
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}
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function onMouseButton(e, down) {
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var evt, pos, bmask;
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if (! conf.focused) {
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return true;
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}
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evt = (e ? e : window.event);
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pos = Util.getEventPosition(e, conf.target, conf.scale);
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bmask = 1 << evt.button;
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//Util.Debug('mouse ' + pos.x + "," + pos.y + " down: " + down + " bmask: " + bmask);
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if (c_mouseButton) {
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c_mouseButton(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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function onMouseDown(e) {
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onMouseButton(e, 1);
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}
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function onMouseUp(e) {
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onMouseButton(e, 0);
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}
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function onMouseWheel(e) {
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var evt, pos, bmask, wheelData;
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evt = (e ? e : window.event);
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pos = Util.getEventPosition(e, conf.target, conf.scale);
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wheelData = evt.detail ? evt.detail * -1 : evt.wheelDelta / 40;
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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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//Util.Debug('mouse scroll by ' + wheelData + ':' + pos.x + "," + pos.y);
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if (c_mouseButton) {
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c_mouseButton(pos.x, pos.y, 1, bmask);
|
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c_mouseButton(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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function onMouseMove(e) {
|
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var evt, pos;
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evt = (e ? e : window.event);
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pos = Util.getEventPosition(e, conf.target, conf.scale);
|
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//Util.Debug('mouse ' + evt.which + '/' + evt.button + ' up:' + pos.x + "," + pos.y);
|
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if (c_mouseMove) {
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c_mouseMove(pos.x, pos.y);
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}
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}
|
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function onKeyDown(e) {
|
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//Util.Debug("keydown: " + getKeysym(e));
|
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if (! conf.focused) {
|
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return true;
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}
|
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if (c_keyPress) {
|
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c_keyPress(getKeysym(e), 1, e.ctrlKey, e.shiftKey, e.altKey);
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}
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Util.stopEvent(e);
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return false;
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}
|
|
|
|
function onKeyUp(e) {
|
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//Util.Debug("keyup: " + getKeysym(e));
|
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if (! conf.focused) {
|
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return true;
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}
|
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if (c_keyPress) {
|
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c_keyPress(getKeysym(e), 0, e.ctrlKey, e.shiftKey, e.altKey);
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}
|
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Util.stopEvent(e);
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return false;
|
|
}
|
|
|
|
function onMouseDisable(e) {
|
|
var evt, pos;
|
|
if (! conf.focused) {
|
|
return true;
|
|
}
|
|
evt = (e ? e : window.event);
|
|
pos = Util.getEventPosition(e, conf.target, conf.scale);
|
|
/* Stop propagation if inside canvas area */
|
|
if ((pos.x >= 0) && (pos.y >= 0) &&
|
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(pos.x < c_width) && (pos.y < c_height)) {
|
|
//Util.Debug("mouse event disabled");
|
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Util.stopEvent(e);
|
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return false;
|
|
}
|
|
//Util.Debug("mouse event not disabled");
|
|
return true;
|
|
}
|
|
|
|
//
|
|
// Public API interface functions
|
|
//
|
|
|
|
that.getContext = function () {
|
|
return conf.ctx;
|
|
};
|
|
|
|
that.start = function(keyPressFunc, mouseButtonFunc, mouseMoveFunc) {
|
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var c;
|
|
Util.Debug(">> Canvas.start");
|
|
|
|
c = conf.target;
|
|
c_keyPress = keyPressFunc || null;
|
|
c_mouseButton = mouseButtonFunc || null;
|
|
c_mouseMove = mouseMoveFunc || null;
|
|
|
|
Util.addEvent(conf.focusContainer, 'keydown', onKeyDown);
|
|
Util.addEvent(conf.focusContainer, 'keyup', onKeyUp);
|
|
Util.addEvent(c, 'mousedown', onMouseDown);
|
|
Util.addEvent(c, 'mouseup', onMouseUp);
|
|
Util.addEvent(c, 'mousemove', onMouseMove);
|
|
Util.addEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel',
|
|
onMouseWheel);
|
|
|
|
/* Work around right and middle click browser behaviors */
|
|
Util.addEvent(conf.focusContainer, 'click', onMouseDisable);
|
|
Util.addEvent(conf.focusContainer.body, 'contextmenu', onMouseDisable);
|
|
|
|
Util.Debug("<< Canvas.start");
|
|
};
|
|
|
|
that.rescale = function(factor) {
|
|
var c, tp, x, y,
|
|
properties = ['transform', 'WebkitTransform', 'MozTransform', null];
|
|
c = conf.target;
|
|
tp = properties.shift();
|
|
while (tp) {
|
|
if (typeof c.style[tp] !== 'undefined') {
|
|
break;
|
|
}
|
|
tp = properties.shift();
|
|
}
|
|
|
|
if (tp === null) {
|
|
Util.Debug("No scaling support");
|
|
return;
|
|
}
|
|
|
|
if (conf.scale === factor) {
|
|
//Util.Debug("Canvas already scaled to '" + factor + "'");
|
|
return;
|
|
}
|
|
|
|
conf.scale = factor;
|
|
x = c.width - c.width * factor;
|
|
y = c.height - c.height * factor;
|
|
c.style[tp] = "scale(" + conf.scale + ") translate(-" + x + "px, -" + y + "px)";
|
|
};
|
|
|
|
that.resize = function(width, height, true_color) {
|
|
var c = conf.target;
|
|
|
|
if (typeof true_color !== "undefined") {
|
|
conf.true_color = true_color;
|
|
}
|
|
c_prevStyle = "";
|
|
|
|
c.width = width;
|
|
c.height = height;
|
|
|
|
c_width = c.offsetWidth;
|
|
c_height = c.offsetHeight;
|
|
|
|
that.rescale(conf.scale);
|
|
};
|
|
|
|
that.clear = function() {
|
|
that.resize(640, 20);
|
|
conf.ctx.clearRect(0, 0, c_width, c_height);
|
|
};
|
|
|
|
that.stop = function() {
|
|
var c = conf.target;
|
|
Util.removeEvent(conf.focusContainer, 'keydown', onKeyDown);
|
|
Util.removeEvent(conf.focusContainer, 'keyup', onKeyUp);
|
|
Util.removeEvent(c, 'mousedown', onMouseDown);
|
|
Util.removeEvent(c, 'mouseup', onMouseUp);
|
|
Util.removeEvent(c, 'mousemove', onMouseMove);
|
|
Util.removeEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel',
|
|
onMouseWheel);
|
|
|
|
/* Work around right and middle click browser behaviors */
|
|
Util.removeEvent(conf.focusContainer, 'click', onMouseDisable);
|
|
Util.removeEvent(conf.focusContainer.body, 'contextmenu', onMouseDisable);
|
|
|
|
// Turn off cursor rendering
|
|
if (conf.cursor_uri) {
|
|
c.style.cursor = "default";
|
|
}
|
|
};
|
|
|
|
that.flush = function() {
|
|
var old_val;
|
|
//Util.Debug(">> flush");
|
|
// Force canvas redraw (for webkit bug #46319 workaround)
|
|
old_val = conf.target.style.marginRight;
|
|
conf.target.style.marginRight = "1px";
|
|
c_flush_timer = null;
|
|
setTimeout(function () {
|
|
conf.target.style.marginRight = old_val;
|
|
}, 1);
|
|
};
|
|
|
|
that.setFillColor = function(color) {
|
|
var rgb, newStyle;
|
|
if (conf.true_color) {
|
|
rgb = color;
|
|
} else {
|
|
rgb = conf.colourMap[color[0]];
|
|
}
|
|
newStyle = "rgb(" + rgb[0] + "," + rgb[1] + "," + rgb[2] + ")";
|
|
if (newStyle !== c_prevStyle) {
|
|
conf.ctx.fillStyle = newStyle;
|
|
c_prevStyle = newStyle;
|
|
}
|
|
};
|
|
|
|
that.fillRect = function(x, y, width, height, color) {
|
|
that.setFillColor(color);
|
|
conf.ctx.fillRect(x, y, width, height);
|
|
};
|
|
|
|
that.copyImage = function(old_x, old_y, new_x, new_y, width, height) {
|
|
conf.ctx.drawImage(conf.target, old_x, old_y, width, height,
|
|
new_x, new_y, width, height);
|
|
};
|
|
|
|
/*
|
|
* Tile rendering functions optimized for rendering engines.
|
|
*
|
|
* - In Chrome/webkit, Javascript image data array manipulations are
|
|
* faster than direct Canvas fillStyle, fillRect rendering. In
|
|
* gecko, Javascript array handling is much slower.
|
|
*/
|
|
that.getTile = function(x, y, width, height, color) {
|
|
var img, data = [], p, rgb, red, green, blue, j, i;
|
|
img = {'x': x, 'y': y, 'width': width, 'height': height,
|
|
'data': data};
|
|
if (conf.prefer_js) {
|
|
if (conf.true_color) {
|
|
rgb = color;
|
|
} else {
|
|
rgb = conf.colourMap[color[0]];
|
|
}
|
|
red = rgb[0];
|
|
green = rgb[1];
|
|
blue = rgb[2];
|
|
for (i = 0; i < (width * height * 4); i+=4) {
|
|
data[i ] = red;
|
|
data[i + 1] = green;
|
|
data[i + 2] = blue;
|
|
}
|
|
} else {
|
|
that.fillRect(x, y, width, height, color);
|
|
}
|
|
return img;
|
|
};
|
|
|
|
that.setSubTile = function(img, x, y, w, h, color) {
|
|
var data, p, rgb, red, green, blue, width, j, i, xend, yend;
|
|
if (conf.prefer_js) {
|
|
data = img.data;
|
|
width = img.width;
|
|
if (conf.true_color) {
|
|
rgb = color;
|
|
} else {
|
|
rgb = conf.colourMap[color[0]];
|
|
}
|
|
red = rgb[0];
|
|
green = rgb[1];
|
|
blue = rgb[2];
|
|
xend = x + w;
|
|
yend = y + h;
|
|
for (j = y; j < yend; j += 1) {
|
|
for (i = x; i < xend; i += 1) {
|
|
p = (i + (j * width) ) * 4;
|
|
data[p ] = red;
|
|
data[p + 1] = green;
|
|
data[p + 2] = blue;
|
|
}
|
|
}
|
|
} else {
|
|
that.fillRect(img.x + x, img.y + y, w, h, color);
|
|
}
|
|
};
|
|
|
|
that.putTile = function(img) {
|
|
if (conf.prefer_js) {
|
|
that.rgbxImage(img.x, img.y, img.width, img.height, img.data, 0);
|
|
} else {
|
|
// No-op, under gecko already done by setSubTile
|
|
}
|
|
};
|
|
|
|
that.imageDataGet = function(width, height) {
|
|
return conf.ctx.getImageData(0, 0, width, height);
|
|
};
|
|
that.imageDataCreate = function(width, height) {
|
|
return conf.ctx.createImageData(width, height);
|
|
};
|
|
|
|
that.rgbxImageData = function(x, y, width, height, arr, offset) {
|
|
var img, i, j, data;
|
|
img = that.imageData(width, height);
|
|
data = img.data;
|
|
for (i=0, j=offset; i < (width * height * 4); i=i+4, j=j+4) {
|
|
data[i + 0] = arr[j + 0];
|
|
data[i + 1] = arr[j + 1];
|
|
data[i + 2] = arr[j + 2];
|
|
data[i + 3] = 255; // Set Alpha
|
|
}
|
|
conf.ctx.putImageData(img, x, y);
|
|
};
|
|
|
|
// really slow fallback if we don't have imageData
|
|
that.rgbxImageFill = function(x, y, width, height, arr, offset) {
|
|
var i, j, sx = 0, sy = 0;
|
|
for (i=0, j=offset; i < (width * height); i+=1, j+=4) {
|
|
that.fillRect(x+sx, y+sy, 1, 1, [arr[j+0], arr[j+1], arr[j+2]]);
|
|
sx += 1;
|
|
if ((sx % width) === 0) {
|
|
sx = 0;
|
|
sy += 1;
|
|
}
|
|
}
|
|
};
|
|
|
|
that.cmapImageData = function(x, y, width, height, arr, offset) {
|
|
var img, i, j, data, rgb, cmap;
|
|
img = that.imageData(width, height);
|
|
data = img.data;
|
|
cmap = conf.colourMap;
|
|
for (i=0, j=offset; i < (width * height * 4); i+=4, j+=1) {
|
|
rgb = cmap[arr[j]];
|
|
data[i + 0] = rgb[0];
|
|
data[i + 1] = rgb[1];
|
|
data[i + 2] = rgb[2];
|
|
data[i + 3] = 255; // Set Alpha
|
|
}
|
|
conf.ctx.putImageData(img, x, y);
|
|
};
|
|
|
|
that.cmapImageFill = function(x, y, width, height, arr, offset) {
|
|
var i, j, sx = 0, sy = 0, cmap;
|
|
cmap = conf.colourMap;
|
|
for (i=0, j=offset; i < (width * height); i+=1, j+=1) {
|
|
that.fillRect(x+sx, y+sy, 1, 1, [arr[j]]);
|
|
sx += 1;
|
|
if ((sx % width) === 0) {
|
|
sx = 0;
|
|
sy += 1;
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
that.blitImage = function(x, y, width, height, arr, offset) {
|
|
if (conf.true_color) {
|
|
that.rgbxImage(x, y, width, height, arr, offset);
|
|
} else {
|
|
that.cmapImage(x, y, width, height, arr, offset);
|
|
}
|
|
};
|
|
|
|
that.blitStringImage = function(str, x, y) {
|
|
var img = new Image();
|
|
img.onload = function () { conf.ctx.drawImage(img, x, y); };
|
|
img.src = str;
|
|
};
|
|
|
|
that.changeCursor = function(pixels, mask, hotx, hoty, w, h) {
|
|
var cur = [], cmap, rgb, IHDRsz, ANDsz, XORsz, url, idx, alpha, x, y;
|
|
//Util.Debug(">> changeCursor, x: " + hotx + ", y: " + hoty + ", w: " + w + ", h: " + h);
|
|
|
|
if (conf.cursor_uri === false) {
|
|
Util.Warn("changeCursor called but no cursor data URI support");
|
|
return;
|
|
}
|
|
|
|
// Push multi-byte little-endian values
|
|
cur.push16le = function (num) {
|
|
this.push((num ) & 0xFF,
|
|
(num >> 8) & 0xFF );
|
|
};
|
|
cur.push32le = function (num) {
|
|
this.push((num ) & 0xFF,
|
|
(num >> 8) & 0xFF,
|
|
(num >> 16) & 0xFF,
|
|
(num >> 24) & 0xFF );
|
|
};
|
|
|
|
cmap = conf.colourMap;
|
|
IHDRsz = 40;
|
|
ANDsz = w * h * 4;
|
|
XORsz = Math.ceil( (w * h) / 8.0 );
|
|
|
|
// Main header
|
|
cur.push16le(0); // Reserved
|
|
cur.push16le(2); // .CUR type
|
|
cur.push16le(1); // Number of images, 1 for non-animated ico
|
|
|
|
// Cursor #1 header
|
|
cur.push(w); // width
|
|
cur.push(h); // height
|
|
cur.push(0); // colors, 0 -> true-color
|
|
cur.push(0); // reserved
|
|
cur.push16le(hotx); // hotspot x coordinate
|
|
cur.push16le(hoty); // hotspot y coordinate
|
|
cur.push32le(IHDRsz + XORsz + ANDsz); // cursor data byte size
|
|
cur.push32le(22); // offset of cursor data in the file
|
|
|
|
// Cursor #1 InfoHeader
|
|
cur.push32le(IHDRsz); // Infoheader size
|
|
cur.push32le(w); // Cursor width
|
|
cur.push32le(h*2); // XOR+AND height
|
|
cur.push16le(1); // number of planes
|
|
cur.push16le(32); // bits per pixel
|
|
cur.push32le(0); // Type of compression
|
|
cur.push32le(XORsz + ANDsz); // Size of Image
|
|
cur.push32le(0);
|
|
cur.push32le(0);
|
|
cur.push32le(0);
|
|
cur.push32le(0);
|
|
|
|
// XOR/color data
|
|
for (y = h-1; y >= 0; y -= 1) {
|
|
for (x = 0; x < w; x += 1) {
|
|
idx = y * Math.ceil(w / 8) + Math.floor(x/8);
|
|
alpha = (mask[idx] << (x % 8)) & 0x80 ? 255 : 0;
|
|
|
|
if (conf.true_color) {
|
|
idx = ((w * y) + x) * 4;
|
|
cur.push(pixels[idx + 2]); // blue
|
|
cur.push(pixels[idx + 1]); // green
|
|
cur.push(pixels[idx + 0]); // red
|
|
cur.push(alpha); // red
|
|
} else {
|
|
idx = (w * y) + x;
|
|
rgb = cmap[pixels[idx]];
|
|
cur.push(rgb[2]); // blue
|
|
cur.push(rgb[1]); // green
|
|
cur.push(rgb[0]); // red
|
|
cur.push(alpha); // alpha
|
|
}
|
|
}
|
|
}
|
|
|
|
// AND/bitmask data (ignored, just needs to be right size)
|
|
for (y = 0; y < h; y += 1) {
|
|
for (x = 0; x < Math.ceil(w / 8); x += 1) {
|
|
cur.push(0x00);
|
|
}
|
|
}
|
|
|
|
url = "data:image/x-icon;base64," + Base64.encode(cur);
|
|
conf.target.style.cursor = "url(" + url + ") " + hotx + " " + hoty + ", default";
|
|
//Util.Debug("<< changeCursor, cur.length: " + cur.length);
|
|
};
|
|
|
|
|
|
|
|
return constructor(); // Return the public API interface
|
|
|
|
} // End of Canvas()
|
|
|
|
|
|
/* Translate DOM key down/up event to keysym value */
|
|
function getKeysym(e) {
|
|
var evt, keysym;
|
|
evt = (e ? e : window.event);
|
|
|
|
/* Remap modifier and special keys */
|
|
switch ( evt.keyCode ) {
|
|
case 8 : keysym = 0xFF08; break; // BACKSPACE
|
|
case 9 : keysym = 0xFF09; break; // TAB
|
|
case 13 : keysym = 0xFF0D; break; // ENTER
|
|
case 27 : keysym = 0xFF1B; break; // ESCAPE
|
|
case 45 : keysym = 0xFF63; break; // INSERT
|
|
case 46 : keysym = 0xFFFF; break; // DELETE
|
|
case 36 : keysym = 0xFF50; break; // HOME
|
|
case 35 : keysym = 0xFF57; break; // END
|
|
case 33 : keysym = 0xFF55; break; // PAGE_UP
|
|
case 34 : keysym = 0xFF56; break; // PAGE_DOWN
|
|
case 37 : keysym = 0xFF51; break; // LEFT
|
|
case 38 : keysym = 0xFF52; break; // UP
|
|
case 39 : keysym = 0xFF53; break; // RIGHT
|
|
case 40 : keysym = 0xFF54; break; // DOWN
|
|
case 112 : keysym = 0xFFBE; break; // F1
|
|
case 113 : keysym = 0xFFBF; break; // F2
|
|
case 114 : keysym = 0xFFC0; break; // F3
|
|
case 115 : keysym = 0xFFC1; break; // F4
|
|
case 116 : keysym = 0xFFC2; break; // F5
|
|
case 117 : keysym = 0xFFC3; break; // F6
|
|
case 118 : keysym = 0xFFC4; break; // F7
|
|
case 119 : keysym = 0xFFC5; break; // F8
|
|
case 120 : keysym = 0xFFC6; break; // F9
|
|
case 121 : keysym = 0xFFC7; break; // F10
|
|
case 122 : keysym = 0xFFC8; break; // F11
|
|
case 123 : keysym = 0xFFC9; break; // F12
|
|
case 16 : keysym = 0xFFE1; break; // SHIFT
|
|
case 17 : keysym = 0xFFE3; break; // CONTROL
|
|
//case 18 : keysym = 0xFFE7; break; // Left Meta (Mac Option)
|
|
case 18 : keysym = 0xFFE9; break; // Left ALT (Mac Command)
|
|
default : keysym = evt.keyCode; break;
|
|
}
|
|
|
|
/* Remap symbols */
|
|
switch (keysym) {
|
|
case 186 : keysym = 59; break; // ; (IE)
|
|
case 187 : keysym = 61; break; // = (IE)
|
|
case 188 : keysym = 44; break; // , (Mozilla, IE)
|
|
case 109 : // - (Mozilla)
|
|
if (Util.Engine.gecko) {
|
|
keysym = 45; }
|
|
break;
|
|
case 189 : keysym = 45; break; // - (IE)
|
|
case 190 : keysym = 46; break; // . (Mozilla, IE)
|
|
case 191 : keysym = 47; break; // / (Mozilla, IE)
|
|
case 192 : keysym = 96; break; // ` (Mozilla, IE)
|
|
case 219 : keysym = 91; break; // [ (Mozilla, IE)
|
|
case 220 : keysym = 92; break; // \ (Mozilla, IE)
|
|
case 221 : keysym = 93; break; // ] (Mozilla, IE)
|
|
case 222 : keysym = 39; break; // ' (Mozilla, IE)
|
|
}
|
|
|
|
/* Remap shifted and unshifted keys */
|
|
if (!!evt.shiftKey) {
|
|
switch (keysym) {
|
|
case 48 : keysym = 41 ; break; // ) (shifted 0)
|
|
case 49 : keysym = 33 ; break; // ! (shifted 1)
|
|
case 50 : keysym = 64 ; break; // @ (shifted 2)
|
|
case 51 : keysym = 35 ; break; // # (shifted 3)
|
|
case 52 : keysym = 36 ; break; // $ (shifted 4)
|
|
case 53 : keysym = 37 ; break; // % (shifted 5)
|
|
case 54 : keysym = 94 ; break; // ^ (shifted 6)
|
|
case 55 : keysym = 38 ; break; // & (shifted 7)
|
|
case 56 : keysym = 42 ; break; // * (shifted 8)
|
|
case 57 : keysym = 40 ; break; // ( (shifted 9)
|
|
|
|
case 59 : keysym = 58 ; break; // : (shifted `)
|
|
case 61 : keysym = 43 ; break; // + (shifted ;)
|
|
case 44 : keysym = 60 ; break; // < (shifted ,)
|
|
case 45 : keysym = 95 ; break; // _ (shifted -)
|
|
case 46 : keysym = 62 ; break; // > (shifted .)
|
|
case 47 : keysym = 63 ; break; // ? (shifted /)
|
|
case 96 : keysym = 126; break; // ~ (shifted `)
|
|
case 91 : keysym = 123; break; // { (shifted [)
|
|
case 92 : keysym = 124; break; // | (shifted \)
|
|
case 93 : keysym = 125; break; // } (shifted ])
|
|
case 39 : keysym = 34 ; break; // " (shifted ')
|
|
}
|
|
} else if ((keysym >= 65) && (keysym <=90)) {
|
|
/* Remap unshifted A-Z */
|
|
keysym += 32;
|
|
}
|
|
|
|
return keysym;
|
|
}
|
|
|