2 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
3 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
4 255,255,255,255,255,255,255,255,255,255,255, 62,255,255,255, 63,
5 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,255,255,255, 0,255,255,
6 255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
7 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,255,255,255,255,255,
8 255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
9 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,255,255,255,255,255
12 function base64_8(str, index) {
14 (base64_val[str.charCodeAt(index)]) +
15 (base64_val[str.charCodeAt(index+1)] << 6);
19 function base64_16(str, index) {
21 (base64_val[str.charCodeAt(index)]) +
22 (base64_val[str.charCodeAt(index+1)] << 6) +
23 (base64_val[str.charCodeAt(index+2)] << 12);
27 function base64_16s(str, index) {
28 var v = base64_16(str, index);
35 function base64_24(str, index) {
37 (base64_val[str.charCodeAt(index)]) +
38 (base64_val[str.charCodeAt(index+1)] << 6) +
39 (base64_val[str.charCodeAt(index+2)] << 12) +
40 (base64_val[str.charCodeAt(index+3)] << 18);
44 function base64_32(str, index) {
46 (base64_val[str.charCodeAt(index)]) +
47 (base64_val[str.charCodeAt(index+1)] << 6) +
48 (base64_val[str.charCodeAt(index+2)] << 12) +
49 (base64_val[str.charCodeAt(index+3)] << 18) +
50 (base64_val[str.charCodeAt(index+4)] << 24) +
51 (base64_val[str.charCodeAt(index+5)] << 30);
57 try { return new XMLHttpRequest(); } catch(e) {}
58 try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); } catch (e) {}
59 try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); } catch (e) {}
60 try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) {}
61 try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {}
67 var outstanding_commands = new Array();
68 var input_socket = null;
70 function initContext(canvas, x, y, id)
72 canvas.surface_id = id;
73 canvas.style["position"] = "absolute"
74 canvas.style["left"] = x + "px"
75 canvas.style["top"] = y + "px"
76 canvas.style["display"] = "none"
77 context = canvas.getContext("2d")
78 context.globalCompositeOperation = "src-over"
79 context.fillRect(0, 0, canvas.width, canvas.height);
80 document.body.appendChild(canvas)
85 function handleCommands(cmd_obj)
87 var cmd = cmd_obj.data;
90 while (i < cmd.length) {
91 var command = cmd[i++];
93 /* create new surface */
95 var id = base64_16(cmd, i);
97 var x = base64_16(cmd, i);
99 var y = base64_16(cmd, i);
101 var w = base64_16(cmd, i);
103 var h = base64_16(cmd, i);
105 var surface = document.createElement("canvas");
108 surfaces[id] = initContext(surface, x, y, id);
113 var id = base64_16(cmd, i);
115 surfaces[id].canvas.style["display"] = "inline";
120 var id = base64_16(cmd, i);
122 surfaces[id].canvas.style["display"] = "inline";
127 var id = base64_16(cmd, i);
129 var canvas = surfaces[id].canvas
131 canvas.parentNode.removeChild(canvas);
137 var id = base64_16(cmd, i);
139 var x = base64_16(cmd, i);
141 var y = base64_16(cmd, i);
143 surfaces[id].canvas.style["left"] = x + "px";
144 surfaces[id].canvas.style["top"] = y + "px";
147 /* resize a surface */
149 var id = base64_16(cmd, i);
151 var w = base64_16(cmd, i);
153 var h = base64_16(cmd, i);
155 surfaces[id].canvas.width = w;
156 surfaces[id].canvas.height = h;
159 /* put image data surface */
161 var id = base64_16(cmd, i);
163 var x = base64_16(cmd, i);
165 var y = base64_16(cmd, i);
167 var size = base64_32(cmd, i);
169 var url = cmd.slice(i, i + size);
171 var img = new Image();
174 surfaces[id].drawImage(img, x, y);
177 img.onload = function() { surfaces[id].drawImage(img, x, y); handleOutstanding(); }
185 var id = base64_16(cmd, i);
188 var nrects = base64_16(cmd, i);
191 var context = surfaces[id];
198 for (var r = 0; r < nrects; r++) {
199 var x = base64_16(cmd, i);
201 var y = base64_16(cmd, i);
203 var w = base64_16(cmd, i);
205 var h = base64_16(cmd, i);
207 context.rect(x, y, w, h);
228 var dx = base64_16s(cmd, i);
230 var dy = base64_16s(cmd, i);
233 context.drawImage(context.canvas,
234 minx - dx, miny - dy, maxx - minx, maxy - miny,
235 minx, miny, maxx - minx, maxy - miny);
241 alert("Unknown op " + command);
247 function handleOutstanding()
249 while (outstanding_commands.length > 0) {
250 var cmd = outstanding_commands.shift();
251 if (!handleCommands(cmd)) {
252 outstanding_commands.unshift(cmd);
258 function handleLoad(event)
261 cmd_obj.data = event.target.responseText;
264 outstanding_commands.push(cmd_obj);
265 if (outstanding_commands.length == 1) {
270 function get_surface_id(ev) {
271 var id = ev.target.surface_id;
277 function send_input(cmd, args)
279 if (input_socket != null) {
280 input_socket.send(cmd + args.join(","));
284 function on_mouse_move (ev) {
285 send_input ("m", [get_surface_id(ev), ev.pageX, ev.pageY, ev.timeStamp])
288 function on_mouse_down (ev) {
289 send_input ("b", [get_surface_id(ev), ev.pageX, ev.pageY, ev.button, ev.timeStamp])
292 function on_mouse_up (ev) {
293 send_input ("B", [get_surface_id(ev), ev.pageX, ev.pageY, ev.button, ev.timeStamp])
296 var last_key_down = 0;
297 function on_key_down (ev) {
298 var key_code = ev.keyCode;
299 if (key_code != last_key_down) {
300 send_input ("k", [key_code, ev.timeStamp]);
301 last_key_down = key_code;
305 function on_key_up (ev) {
306 var key_code = ev.keyCode;
307 send_input ("K", [key_code, ev.timeStamp]);
311 function cancel_event(ev)
313 ev = ev ? ev : window.event;
314 if (ev.stopPropagation)
315 ev.stopPropagation();
316 if (ev.preventDefault)
318 ev.cancelBubble = true;
320 ev.returnValue = false;
324 function on_mouse_wheel(ev)
326 ev = ev ? ev : window.event;
327 var offset = ev.detail ? ev.detail : ev.wheelDelta;
331 send_input ("s", [get_surface_id(ev), ev.pageX, ev.pageY, dir, ev.timeStamp])
333 return cancel_event(ev);
338 var xhr = createXHR();
340 if (typeof xhr.multipart == 'undefined') {
341 alert("Sorry, this example only works in browsers that support multipart.");
345 xhr.multipart = true;
346 xhr.open("GET", "/output", true);
347 xhr.onload = handleLoad;
351 if ("WebSocket" in window) {
352 var loc = window.location.toString().replace("http:", "ws:");
353 loc = loc.substr(0, loc.lastIndexOf('/')) + "/input";
354 var ws = new WebSocket(loc, "broadway");
355 ws.onopen = function() {
358 ws.onclose = function() {
362 alert("WebSocket not supported, input will not work!");
364 document.oncontextmenu = function () { return false; }
365 document.onmousemove = on_mouse_move;
366 document.onmousedown = on_mouse_down;
367 document.onmouseup = on_mouse_up;
368 document.onkeydown = on_key_down;
369 document.onkeyup = on_key_up;
371 if (document.addEventListener) {
372 document.addEventListener('DOMMouseScroll', on_mouse_wheel, false);
373 document.addEventListener('mousewheel', on_mouse_wheel, false);
374 } else if (document.attachEvent) {
375 element.attachEvent("onmousewheel", on_mouse_wheel);