34
34
windowpane_mode = false;
35
35
server_started = false;
40
function get_console_start_directory()
42
if((typeof(current_path) != 'undefined') && current_file)
44
// We have a current_path - give a suggestion to the server
46
if (current_file.isdir)
49
return path_join("/home", current_path);
53
// Editor - need to chop off filename
54
var tmp_path = current_path.split('/');
56
return path_join("/home", tmp_path.join('/'));
61
// No current_path - let the server decide
37
66
/* Starts the console server, if it isn't already.
38
67
* This can be called any number of times - it only starts the one server.
68
* Note that this is asynchronous. It will return after signalling to start
69
* the server, but there is no guarantee that it has been started yet.
39
70
* This is a separate step from console_init, as the server is only to be
40
71
* started once the first command is entered.
41
72
* Does not return a value. Writes to global variables
42
73
* server_host, and server_port.
44
function start_server()
46
if (server_started) return;
47
var xhr = ajax_call("consoleservice", "start", {}, "POST");
48
var json_text = xhr.responseText;
49
server_key = JSON.parse(json_text);
50
server_started = true;
75
* \param callback Function which will be called after the server has been
76
* started. No parameters are passed. May be null.
78
function start_server(callback)
85
var callback1 = function(xhr)
87
var json_text = xhr.responseText;
90
server_key = JSON.parse(json_text).key;
91
server_started = true;
93
"ivle.op": "chat", "kind": "splash", "key": server_key
95
var callback2 = function(xhr)
97
console_response(null, null, xhr.responseText);
101
ajax_call(callback2, "console", "service", args, "POST");
105
alert("An error occured when starting the IVLE console. " +
106
"Please refresh the page and try again.\n" +
107
"Details have been logged for further examination.")
111
$("#console_output").append(
112
'<span class="console_message">IVLE console starting up...</span>\n');
113
console_maximize(true);
115
callback1, "console", "service",
116
{"ivle.op": "start", "cwd": get_console_start_directory()},
120
/** Start up the console backend before the user has entered text.
121
* This will disable the text input, start a backend, and enable the input
124
function start_server_early()
126
var inputbox = document.getElementById("console_inputText");
127
inputbox.setAttribute("disabled", "disabled");
128
var callback = function(xhr)
130
inputbox.removeAttribute("disabled")
132
start_server(callback);
53
135
/** Initialises the console. All apps which import console are required to
198
274
var hist = new History();
276
function set_interrupt()
281
function clear_output()
283
var output = document.getElementById("console_output");
284
while (output.firstChild)
286
output.removeChild(output.firstChild);
200
290
/** Send a line of text to the Python server, wait for its return, and react
201
291
* to its response by writing to the output box.
202
292
* Also maximize the console window if not already.
204
function console_enter_line(inputline, which)
206
/* Start the server if it hasn't already been started */
208
var args = {"key": server_key, "text":inputline};
209
var xmlhttp = ajax_call("consoleservice", which, args, "POST");
211
var res = JSON.parse(xmlhttp.responseText);
212
var output = document.getElementById("console_output");
214
var pre = document.createElement("pre");
215
pre.setAttribute("class", "inputMsg");
216
pre.appendChild(document.createTextNode(inputline + "\n"));
217
output.appendChild(pre);
294
function console_enter_line(inputbox, which)
298
// Open up the console so we can see the output
301
if (typeof(inputbox) == "string")
303
var inputline = inputbox + "\n";
308
/* Disable the text box */
309
inputbox.setAttribute("disabled", "disabled");
311
var inputline = inputbox.value + "\n";
313
var output = document.getElementById("console_output");
316
var span = document.createElement("span");
317
span.setAttribute("class", "inputPrompt");
318
span.appendChild(document.createTextNode(
319
document.getElementById("console_prompt").firstChild.nodeValue)
321
output.appendChild(span);
322
// Print input line itself in a span
323
var span = document.createElement("span");
324
span.setAttribute("class", "inputMsg");
325
span.appendChild(document.createTextNode(inputline));
326
output.appendChild(span);
327
divScroll.activeScroll();
330
"ivle.op": "chat", "kind": which, "key": server_key,
331
"text": inputline, "cwd": get_console_start_directory()
333
var callback = function(xhr)
335
console_response(inputbox, inputline, xhr.responseText);
337
ajax_call(callback, "console", "service", args, "POST");
340
function console_response(inputbox, inputline, responseText)
344
var res = JSON.parse(responseText);
348
alert("An internal error occurred in the python console.");
351
var output = document.getElementById("console_output");
219
352
if (res.hasOwnProperty('okay'))
222
// print out the output (res.okay[0])
223
var pre = document.createElement("pre");
224
pre.setAttribute("class", "outputMsg");
225
pre.appendChild(document.createTextNode(res.okay[0]));
226
output.appendChild(pre);
227
// print out the return value (res.okay[1])
230
var pre = document.createElement("pre");
231
pre.setAttribute("class", "outputMsg");
232
pre.appendChild(document.createTextNode(res.okay[1] + "\n"));
233
output.appendChild(pre);
357
output.appendChild(document.createTextNode(res.okay + "\n"));
358
output.appendChild(span);
359
divScroll.activeScroll();
235
361
// set the prompt to >>>
236
var prompt = document.getElementById("console_prompt");
237
prompt.replaceChild(document.createTextNode(">>> "), prompt.firstChild);
239
364
else if (res.hasOwnProperty('exc'))
242
// print out any output that came before the error
243
if (res.exc[0].length > 0)
245
var pre = document.createElement("pre");
246
pre.setAttribute("class", "outputMsg");
247
pre.appendChild(document.createTextNode(res.exc[0]));
248
output.appendChild(pre);
251
367
// print out the error message (res.exc)
252
var pre = document.createElement("pre");
253
pre.setAttribute("class", "errorMsg");
254
pre.appendChild(document.createTextNode(res.exc[1]));
255
output.appendChild(pre);
368
print_error(res.exc);
370
// set the prompt to >>>
373
else if (res.hasOwnProperty('restart') && res.hasOwnProperty('key'))
375
// Server has indicated that the console should be restarted
377
// Get the new key (host, port, magic)
378
server_key = res.key;
380
// Print a reason to explain why we'd do such a horrible thing
381
// (console timeout, server error etc.)
383
"IVLE console restarted: " + res.restart, "console_message");
385
// set the prompt to >>>
257
388
else if (res.hasOwnProperty('more'))
259
390
// Need more input, so set the prompt to ...
260
var prompt = document.getElementById("console_prompt");
261
prompt.replaceChild(document.createTextNode("... "), prompt.firstChild);
264
// assert res.hasOwnProperty('input')
265
var prompt = document.getElementById("console_prompt");
266
prompt.replaceChild(document.createTextNode("+++ "), prompt.firstChild);
268
/* Open up the console so we can see the output */
393
else if (res.hasOwnProperty('output'))
395
if (res.output.length > 0)
397
output.appendChild(document.createTextNode(res.output));
398
divScroll.activeScroll();
400
var callback = function(xhr)
402
console_response(inputbox, null, xhr.responseText);
406
var kind = "interrupt";
413
"ivle.op": "chat", "kind": kind, "key": server_key,
414
"text": '', "cwd": get_console_start_directory()
416
ajax_call(callback, "console", "service", args, "POST");
418
// Open up the console so we can see the output
421
// Return early, so we don't re-enable the input box.
424
else if (res.hasOwnProperty('input'))
430
alert("An internal error occurred in the python console.");
434
if (inputbox != null)
436
/* Re-enable the text box */
437
inputbox.removeAttribute("disabled");
442
divScroll.activeScroll();
444
// Focus the input box by default
445
document.getElementById("console_output").focus();
446
document.getElementById("console_inputText").focus();
272
449
function catch_input(key)
306
483
case 13: /* Enter key */
307
/* Send the line of text to the server */
308
console_enter_line(inp.value, "chat");
309
hist.submit(inp.value);
310
inp.value = hist.curr();
484
var callback = function()
486
/* Send the line of text to the server */
487
console_enter_line(inp, "chat");
488
hist.submit(inp.value);
489
inp.value = hist.curr();
492
/* Disable the text box. This will be redone by
493
* console_enter_line, but we do it here too in case start_server
496
inp.setAttribute("disabled", "disabled");
497
/* Start the server if it hasn't already been started */
498
start_server(callback);
312
500
case 38: /* Up arrow */
313
501
hist.up(inp.value);
314
502
inp.value = hist.curr();
503
/* Inhibit further responses to this event, or WebKit moves the
504
* cursor to the start. */
316
507
case 40: /* Down arrow */
317
508
hist.down(inp.value);
318
509
inp.value = hist.curr();
515
/** Resets the console by signalling the old console to expire and starting a
518
function console_reset()
520
// FIXME: We show some feedback here - either disable input or at very
521
// least the reset button.
523
// Restart the console
530
xhr = ajax_call(null, "console", "service", {"ivle.op": "chat", "kind": "terminate", "key": server_key, "cwd": get_console_start_directory()}, "POST");
531
console_response(null, null, xhr.responseText);
535
/** Prints an error line in the console **/
536
function print_error(error, cls)
541
var output = document.getElementById("console_output");
544
var span = document.createElement("span");
545
span.setAttribute("class", cls);
546
span.appendChild(document.createTextNode(error + "\n"));
547
output.appendChild(span);
550
divScroll.activeScroll();
553
/** Sets the prompt text **/
554
function set_prompt(prompt_text)
556
var prompt = document.getElementById("console_prompt");
557
prompt.replaceChild(document.createTextNode(prompt_text + " "), prompt.firstChild);
560
/**** Following Code modified from ******************************************/
561
/**** http://radio.javaranch.com/pascarello/2006/08/17/1155837038219.html ***/
562
/****************************************************************************/
563
var chatscroll = new Object();
565
chatscroll.Pane = function(scrollContainerId)
567
this.scrollContainerId = scrollContainerId;
570
chatscroll.Pane.prototype.activeScroll = function()
572
var scrollDiv = document.getElementById(this.scrollContainerId);
573
var currentHeight = 0;
575
if (scrollDiv.scrollHeight > 0)
576
currentHeight = scrollDiv.scrollHeight;
577
else if (scrollDiv.offsetHeight > 0)
578
currentHeight = scrollDiv.offsetHeight;
580
scrollDiv.scrollTop = currentHeight;
585
var divScroll = new chatscroll.Pane('console_output');