34
41
/** Creates a DOM element with simple text inside it.
35
42
* \param tagname String. Name of the element's tag (eg. "p").
36
43
* \param text String. Text to be placed inside the element.
44
* \param title String, optional. Tooltip for the text.
45
* (Note, title creates a span element around the text).
37
46
* \return DOM Element object.
39
function dom_make_text_elem(tagname, text)
48
function dom_make_text_elem(tagname, text, title)
41
50
if (text == null) text = "";
42
51
var elem = document.createElement(tagname);
43
elem.appendChild(document.createTextNode(text));
54
textnode = document.createTextNode(text);
57
textnode = document.createElement("span");
58
textnode.setAttribute("title", title);
59
textnode.appendChild(document.createTextNode(text));
61
elem.appendChild(textnode);
47
65
/** Creates a DOM element with hyperlinked text inside it.
48
66
* \param tagname String. Name of the element's tag (eg. "p").
49
67
* \param text String. Text to be placed inside the element.
68
* \param title String, optional. Sets a tooltip for the link.
50
69
* \param href String. URL the text will link to. This is a raw string,
51
70
* it will automatically be URL-encoded.
52
71
* \param onclick Optional string. Will be set as the "onclick" attribute
53
72
* of the "a" element.
73
* \param dontencode Optional boolean. If true, will not encode the href.
74
* if including query strings, you must set this to true and use build_url
75
* to escape the URI correctly.
54
76
* \return DOM Element object.
56
function dom_make_link_elem(tagname, text, href, onclick)
78
function dom_make_link_elem(tagname, text, title, href, onclick, dontencode)
58
80
if (text == null) text = "";
59
81
if (href == null) href = "";
60
82
var elem = document.createElement(tagname);
61
83
var link = document.createElement("a");
62
link.setAttribute("href", encodeURI(href));
84
if (dontencode != true)
85
href = urlencode_path(href);
86
link.setAttribute("href", href);
88
link.setAttribute("title", title);
63
89
if (onclick != null)
64
90
link.setAttribute("onclick", onclick);
65
91
link.appendChild(document.createTextNode(text));
287
310
url += ":" + obj.server_port.toString();
288
311
if (("path" in obj) && obj.path != null)
290
var path = obj.path.toString();
291
if (url.length > 0 && path.length > 0 && path[0] != "/")
313
var path = urlencode_path(obj.path.toString());
314
if (url.length > 0 && path.length > 0 && path.charAt(0) != "/")
292
315
path = "/" + path;
295
318
if (("query_string" in obj) && obj.query_string != null)
296
query_string = obj.query_string.toString();
319
query_string = encodeURI(obj.query_string.toString());
297
320
else if (("args" in obj) && obj.args != null)
298
321
query_string = make_query_string(obj.args);
300
if (query_string != null)
323
if (query_string != "" && query_string != null)
301
324
url += "?" + query_string;
303
return encodeURI(url);
329
/** URL-encodes a path. This is a special case of URL encoding as all
330
* characters *except* the slash must be encoded.
332
function urlencode_path(path)
334
/* Split up the path, URLEncode each segment with encodeURIComponent,
337
var split = path.split('/');
338
for (var i=0; i<split.length; i++)
339
split[i] = encodeURIComponent(split[i]);
340
path = path_join.apply(null, split);
341
if (split[0] == "" && split.length > 1) path = "/" + path;
345
/** Writes a JSONable object to the cookie under a particular key
346
* (JSON encoded and URL encoded).
348
function write_cookie(key, value)
350
var sendstr = encodeURIComponent(key) + "="
351
+ encodeURIComponent(JSON.stringify(value))
352
+ "; path=" + urlencode_path(root_dir);
353
/* This actually just assigns to the key, not replacing the whole cookie
354
* as it appears to. */
355
document.cookie = sendstr;
357
/** Reads a cookie which has a JSONable object encoded as its value.
358
* Returns the object, parsed from JSON.
360
function read_cookie(key)
362
var cookies = document.cookie.split(";");
363
var checkstart = encodeURIComponent(key) + "=";
364
var checklen = checkstart.length;
365
for (var i=0; i<cookies.length; i++)
367
var cookie = cookies[i];
368
while (cookie[0] == ' ')
369
cookie = cookie.substr(1);
370
if (cookie.substr(0, checklen) == checkstart)
372
var valstr = cookie.substr(checklen);
373
valstr = decodeURIComponent(valstr);
374
return JSON.parse(valstr);
306
379
/** Given an argument map, as output in the args parameter of the return of
431
504
return path_join(root_dir, path);
434
/** Makes an XMLHttpRequest call to the server. Waits (synchronously) for a
435
* response, and returns an XMLHttpRequest object containing the completed
507
/** Shorthand for make_path(path_join(app, ...))
508
* Creates an absolute path for a given path within a given app.
510
function app_path(app /*,...*/)
512
return make_path(path_join.apply(null, arguments));
515
/** Generates an absolute URL to a public application
517
function public_app_path(app /*,...*/)
519
return location.protocol + "//" + public_host
520
+ make_path(path_join.apply(null, arguments));
523
/** Given a path, gets the "basename" (the last path segment).
525
function path_basename(path)
527
segments = path.split("/");
528
if (segments[segments.length-1].length == 0)
529
return segments[segments.length-2];
531
return segments[segments.length-1];
534
/** Given a string str, determines whether it ends with substr */
535
function endswith(str, substring)
537
if (str.length < substring.length) return false;
538
return str.substr(str.length - substring.length) == substring;
541
/** Equivalent to Python's repr.
542
* Gets the JavaScript string representation.
543
* Actually just calls JSON.stringify.
547
return JSON.stringify(str);
550
/** Removes all occurences of a value from an array.
552
Array.prototype.removeall = function(val)
557
for (i=0; i<arr.length; i++)
560
if (arr[i] != val) j++;
565
/** Shallow-clones an object */
566
function shallow_clone_object(obj)
574
/** Returns a new XMLHttpRequest object, in a somewhat browser-agnostic
577
function new_xmlhttprequest()
582
return new XMLHttpRequest();
586
/* Internet Explorer */
589
return new ActiveXObject("Msxml2.XMLHTTP");
595
return new ActiveXObject("Microsoft.XMLHTTP");
599
throw("Your browser does not support AJAX. "
600
+ "IVLE requires a modern browser.");
606
/** Creates a random string of length length,
607
* consisting of alphanumeric characters.
609
var rand_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZ"
610
+ "abcdefghiklmnopqrstuvwxyz";
611
function random_string(length)
613
var str = Array(length);
615
for (var i=0; i<length; i++)
617
v = Math.floor(Math.random() * rand_chars.length);
618
str[i] = rand_chars.charAt(v);
623
/** Makes an asynchronous XMLHttpRequest call to the server.
624
* Sends the XMLHttpRequest object containing the completed response to a
625
* specified callback function.
627
* \param callback A callback function. Will be called when the response is
628
* complete. Passed 1 parameter, an XMLHttpRequest object containing the
629
* completed response.
438
630
* \param app IVLE app to call (such as "fileservice").
439
631
* \param path URL path to make the request to, within the application.
440
632
* \param args Argument object, as described in parse_url and friends.
442
634
* \param content_type String, optional. Only applies if method is "POST".
443
635
* May be "application/x-www-form-urlencoded" or "multipart/form-data".
444
636
* Defaults to "application/x-www-form-urlencoded".
445
* \return An XMLHttpRequest object containing the completed response.
447
function ajax_call(app, path, args, method, content_type)
638
function ajax_call(callback, app, path, args, method, content_type)
449
640
if (content_type != "multipart/form-data")
450
641
content_type = "application/x-www-form-urlencoded";
451
path = make_path(path_join(app, path));
642
path = app_path(app, path);
453
644
/* A random string, for multipart/form-data
454
645
* (This is not checked against anywhere else, it is solely defined and
455
646
* used within this function) */
456
var boundary = "48234n334nu7n4n2ynonjn234t683jyh80j";
457
var xhr = new XMLHttpRequest();
647
var boundary = random_string(20);
648
var xhr = new_xmlhttprequest();
649
xhr.onreadystatechange = function()
651
if (xhr.readyState == 4)
458
656
if (method == "GET")
460
658
/* GET sends the args in the URL */
461
659
url = build_url({"path": path, "args": args});
462
/* open's 3rd argument = false -> SYNCHRONOUS (wait for response)
463
* (No need for a callback function) */
464
xhr.open(method, url, false);
660
/* open's 3rd argument = true -> asynchronous */
661
xhr.open(method, url, true);
469
666
/* POST sends the args in application/x-www-form-urlencoded */
470
667
url = encodeURI(path);
471
xhr.open(method, url, false);
668
xhr.open(method, url, true);
473
670
if (content_type == "multipart/form-data")
475
672
xhr.setRequestHeader("Content-Type",
476
"multipart/form-data, boundary=" + boundary);
673
"multipart/form-data; boundary=" + boundary);
477
674
message = make_multipart_formdata(args, boundary);