23
digest_constant = "hello";
25
/* Begin religious debate (tabs vs spaces) here: */
26
/* (This string will be inserted in the console when the user presses the Tab
30
29
/* Console DOM objects */
31
30
console_body = null;
32
31
console_filler = null;
34
windowpane_mode = false;
35
server_started = false;
39
/* Starts the console server, if it isn't already.
40
* This can be called any number of times - it only starts the one server.
41
* Note that this is asynchronous. It will return after signalling to start
42
* the server, but there is no guarantee that it has been started yet.
43
* This is a separate step from console_init, as the server is only to be
44
* started once the first command is entered.
45
* Does not return a value. Writes to global variables
46
* server_host, and server_port.
48
* \param callback Function which will be called after the server has been
49
* started. No parameters are passed. May be null.
33
/* Starts the console server.
34
* Returns an object with fields "host", "port", "magic" describing the
51
function start_server(callback)
37
function start_server()
58
var callback1 = function(xhr)
60
var json_text = xhr.responseText;
61
server_key = JSON.parse(json_text).key;
62
server_started = true;
68
if((typeof(current_path) != 'undefined') && current_file)
70
// We have a current_path - give a suggestion to the server
72
if (current_file.isdir)
75
path = path_join("/home", current_path);
79
// Editor - need to chop off filename
80
var tmp_path = current_path.split('/');
82
path = path_join("/home", tmp_path.join('/'));
84
ajax_call(callback1, "console", "service", {"ivle.op": "start", "cwd": path}, "POST");
88
// No current_path - let the server decide
89
ajax_call(callback1, "console", "service", {"ivle.op": "start"}, "POST");
39
var xhr = ajax_call("consoleservice", "start", {}, "POST");
40
var json_text = xhr.responseText;
41
return JSON.parse(json_text);
93
44
/** Initialises the console. All apps which import console are required to
204
* This is a fairly complex mechanism due to complications when editing
205
* history items. We store two arrays. "items" is the permanent history of
206
* each item. "edited" is a "volatile" version of items - the edits made to
207
* the history between now and last time you hit "enter".
208
* This is because the user can go back and edit any of the previous items,
209
* and the edits are remembered until they hit enter.
211
* When hitting enter, the "edited" version of the currently selected item
212
* replaces the "item" version of the last item in the list.
213
* Then a new blank item is created, for the new line of input.
214
* Lastly, all the "edited" versions are replaced with their stable versions.
216
* Cursor never points to an invalid location.
218
145
function History()
220
this.items = new Array("");
221
this.edited = new Array("");
223
this.earliestCursor = 0;
147
this.items = new Array();
224
149
this.up = historyUp;
225
150
this.down = historyDown;
226
151
this.curr = historyCurr;
227
this.submit = historySubmit;
152
this.add = historyAdd;
228
153
this.show = historyShow;
231
156
var hist = new History();
233
function set_interrupt()
238
function clear_output()
240
var output = document.getElementById("console_output");
241
while (output.firstChild)
243
output.removeChild(output.firstChild);
247
158
/** Send a line of text to the Python server, wait for its return, and react
248
159
* to its response by writing to the output box.
249
160
* Also maximize the console window if not already.
251
function console_enter_line(inputbox, which)
255
if (typeof(inputbox) == "string")
257
var inputline = inputbox + "\n";
262
/* Disable the text box */
263
inputbox.setAttribute("disabled", "disabled");
265
var inputline = inputbox.value + "\n";
267
var output = document.getElementById("console_output");
270
var span = document.createElement("span");
271
span.setAttribute("class", "inputPrompt");
272
span.appendChild(document.createTextNode(
273
document.getElementById("console_prompt").firstChild.nodeValue)
275
output.appendChild(span);
276
// Print input line itself in a span
277
var span = document.createElement("span");
278
span.setAttribute("class", "inputMsg");
279
span.appendChild(document.createTextNode(inputline));
280
output.appendChild(span);
282
var args = {"ivle.op": "chat", "kind": which, "key": server_key, "text":inputline};
283
var callback = function(xhr)
285
console_response(inputbox, inputline, xhr.responseText);
287
ajax_call(callback, "console", "service", args, "POST");
290
function console_response(inputbox, inputline, responseText)
294
var res = JSON.parse(responseText);
298
alert("An internal error occurred in the python console.");
301
var output = document.getElementById("console_output");
162
function console_enter_line(inputline)
164
var digest = hex_md5(inputline + magic);
165
var args = {"host": server_host, "port": server_port,
166
"digest":digest, "text":inputline};
167
var xmlhttp = ajax_call("consoleservice", "chat", args, "POST");
169
var res = JSON.parse(xmlhttp.responseText);
170
var output = document.getElementById("console_output");
172
var pre = document.createElement("pre");
173
pre.setAttribute("class", "inputMsg");
174
pre.appendChild(document.createTextNode(inputline + "\n"));
175
output.appendChild(pre);
302
177
if (res.hasOwnProperty('okay'))
180
// print out the output (res.okay[0])
181
var pre = document.createElement("pre");
182
pre.setAttribute("class", "outputMsg");
183
pre.appendChild(document.createTextNode(res.okay[0]));
184
output.appendChild(pre);
185
// print out the return value (res.okay[1])
307
output.appendChild(document.createTextNode(res.okay + "\n"));
308
output.appendChild(span);
188
var pre = document.createElement("pre");
189
pre.setAttribute("class", "outputMsg");
190
pre.appendChild(document.createTextNode(res.okay[1] + "\n"));
191
output.appendChild(pre);
310
193
// set the prompt to >>>
194
var prompt = document.getElementById("console_prompt");
195
prompt.replaceChild(document.createTextNode(">>> "), prompt.firstChild);
313
197
else if (res.hasOwnProperty('exc'))
316
200
// print out the error message (res.exc)
317
print_error(res.exc);
319
// set the prompt to >>>
322
else if (res.hasOwnProperty('restart') && res.hasOwnProperty('key'))
324
// Server has indicated that the console should be restarted
326
// Get the new key (host, port, magic)
327
server_key = res.key;
329
// Print a reason to explain why we'd do such a horrible thing
330
// (console timeout, server error etc.)
331
print_error("Console Restart: " + res.restart);
333
// set the prompt to >>>
201
var pre = document.createElement("pre");
202
pre.setAttribute("class", "errorMsg");
203
pre.appendChild(document.createTextNode(res.exc));
204
output.appendChild(pre);
336
206
else if (res.hasOwnProperty('more'))
338
208
// Need more input, so set the prompt to ...
341
else if (res.hasOwnProperty('output'))
343
if (res.output.length > 0)
345
output.appendChild(document.createTextNode(res.output));
347
var callback = function(xhr)
349
console_response(inputbox, null, xhr.responseText);
353
var kind = "interrupt";
359
var args = {"ivle.op": "chat", "kind": kind, "key": server_key, "text":''};
360
ajax_call(callback, "console", "service", args, "POST");
362
// Open up the console so we can see the output
363
// FIXME: do we need to maximize here?
367
divScroll.activeScroll();
369
// Return early, so we don't re-enable the input box.
209
var prompt = document.getElementById("console_prompt");
210
prompt.replaceChild(document.createTextNode("... "), prompt.firstChild);
374
213
// assert res.hasOwnProperty('input')
378
if (inputbox != null)
380
/* Re-enable the text box */
381
inputbox.removeAttribute("disabled");
214
var prompt = document.getElementById("console_prompt");
215
prompt.replaceChild(document.createTextNode("+++ "), prompt.firstChild);
385
217
/* Open up the console so we can see the output */
386
218
console_maximize();
388
divScroll.activeScroll();
390
// Focus the input box by default
391
document.getElementById("console_output").focus();
392
document.getElementById("console_inputText").focus();
395
221
function catch_input(key)
397
223
var inp = document.getElementById('console_inputText');
400
case 9: /* Tab key */
401
var selstart = inp.selectionStart;
402
var selend = inp.selectionEnd;
403
if (selstart == selend)
405
/* No selection, just a carat. Insert a tab here. */
406
inp.value = inp.value.substr(0, selstart)
407
+ TAB_STRING + inp.value.substr(selstart);
411
/* Text is selected. Just indent the whole line
412
* by inserting a tab at the start */
413
inp.value = TAB_STRING + inp.value;
415
/* Update the selection so the same characters as before are selected
417
inp.selectionStart = selstart + TAB_STRING.length;
418
inp.selectionEnd = inp.selectionStart + (selend - selstart);
419
/* Cancel the event, so the TAB key doesn't move focus away from this
422
/* Note: If it happens that some browsers don't support event
423
* cancelling properly, this hack might work instead:
425
"document.getElementById('console_inputText').focus()",
429
case 13: /* Enter key */
430
var callback = function()
432
/* Send the line of text to the server */
433
console_enter_line(inp, "chat");
434
hist.submit(inp.value);
435
inp.value = hist.curr();
437
/* Start the server if it hasn't already been started */
438
start_server(callback);
440
case 38: /* Up arrow */
442
inp.value = hist.curr();
444
case 40: /* Down arrow */
445
hist.down(inp.value);
446
inp.value = hist.curr();
451
/** Resets the console by signalling the old console to expire and starting a
454
function console_reset()
456
// FIXME: We show some feedback here - either disable input or at very
457
// least the reset button.
459
// Restart the console
466
xhr = ajax_call(null, "console", "service", {"ivle.op": "chat", "kind": "terminate", "key": server_key}, "POST");
467
console_response(null, null, xhr.responseText);
471
/** Prints an error line in the console **/
472
function print_error(error)
474
var output = document.getElementById("console_output");
477
var span = document.createElement("span");
478
span.setAttribute("class", "errorMsg");
479
span.appendChild(document.createTextNode(error + "\n"));
480
output.appendChild(span);
483
divScroll.activeScroll();
486
/** Sets the prompt text **/
487
function set_prompt(prompt_text)
489
var prompt = document.getElementById("console_prompt");
490
prompt.replaceChild(document.createTextNode(prompt_text + " "), prompt.firstChild);
493
/**** Following Code modified from ******************************************/
494
/**** http://radio.javaranch.com/pascarello/2006/08/17/1155837038219.html ***/
495
/****************************************************************************/
496
var chatscroll = new Object();
498
chatscroll.Pane = function(scrollContainerId)
500
this.scrollContainerId = scrollContainerId;
503
chatscroll.Pane.prototype.activeScroll = function()
505
var scrollDiv = document.getElementById(this.scrollContainerId);
506
var currentHeight = 0;
508
if (scrollDiv.scrollHeight > 0)
509
currentHeight = scrollDiv.scrollHeight;
510
else if (scrollDiv.offsetHeight > 0)
511
currentHeight = scrollDiv.offsetHeight;
513
scrollDiv.scrollTop = currentHeight;
518
var divScroll = new chatscroll.Pane('console_output');
226
console_enter_line(inp.value);
228
inp.value = hist.curr();
233
inp.value = hist.curr();
238
inp.value = hist.curr();