41
34
/** Creates a DOM element with simple text inside it.
42
35
* \param tagname String. Name of the element's tag (eg. "p").
43
36
* \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).
46
37
* \return DOM Element object.
48
function dom_make_text_elem(tagname, text, title)
39
function dom_make_text_elem(tagname, text)
50
if (text == null) text = "";
51
41
var elem = document.createElement(tagname);
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);
42
elem.appendChild(document.createTextNode(text));
65
46
/** Creates a DOM element with hyperlinked text inside it.
66
47
* \param tagname String. Name of the element's tag (eg. "p").
67
48
* \param text String. Text to be placed inside the element.
68
* \param title String, optional. Sets a tooltip for the link.
69
49
* \param href String. URL the text will link to. This is a raw string,
70
50
* it will automatically be URL-encoded.
71
51
* \param onclick Optional string. Will be set as the "onclick" attribute
72
52
* 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.
76
53
* \return DOM Element object.
78
function dom_make_link_elem(tagname, text, title, href, onclick, dontencode)
55
function dom_make_link_elem(tagname, text, href, onclick)
80
if (text == null) text = "";
81
if (href == null) href = "";
82
57
var elem = document.createElement(tagname);
83
58
var link = document.createElement("a");
84
if (dontencode != true)
85
href = urlencode_path(href);
86
link.setAttribute("href", href);
88
link.setAttribute("title", title);
59
link.setAttribute("href", encodeURI(href));
89
60
if (onclick != null)
90
61
link.setAttribute("onclick", onclick);
91
62
link.appendChild(document.createTextNode(text));
96
/** Creates a DOM img element. All parameters are optional except src.
97
* If alt (compulsory in HTML) is omitted, will be set to "".
99
function dom_make_img(src, width, height, title, alt)
101
var img = document.createElement("img");
102
img.setAttribute("src", urlencode_path(src));
104
img.setAttribute("width", width);
106
img.setAttribute("height", height);
108
img.setAttribute("title", title);
109
if (alt == null) alt = "";
110
img.setAttribute("alt", alt);
114
67
/** Given a number of bytes, returns a string representing the file size in a
115
68
* human-readable format.
116
69
* eg. nice_filesize(6) -> "6 bytes"
310
265
url += ":" + obj.server_port.toString();
311
266
if (("path" in obj) && obj.path != null)
313
var path = urlencode_path(obj.path.toString());
314
if (url.length > 0 && path.length > 0 && path.charAt(0) != "/")
268
var path = obj.path.toString();
269
if (url.length > 0 && path.length > 0 && path[0] != "/")
315
270
path = "/" + path;
318
273
if (("query_string" in obj) && obj.query_string != null)
319
query_string = encodeURI(obj.query_string.toString());
274
query_string = obj.query_string.toString();
320
275
else if (("args" in obj) && obj.args != null)
321
276
query_string = make_query_string(obj.args);
323
if (query_string != "" && query_string != null)
278
if (query_string != null)
324
279
url += "?" + query_string;
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);
281
return encodeURI(url);
379
284
/** Given an argument map, as output in the args parameter of the return of
504
409
return path_join(root_dir, path);
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
/** Removes all occurences of a value from an array.
543
Array.prototype.removeall = function(val)
548
for (i=0; i<arr.length; i++)
551
if (arr[i] != val) j++;
556
/** Shallow-clones an object */
557
function shallow_clone_object(obj)
565
/** Returns a new XMLHttpRequest object, in a somewhat browser-agnostic
568
function new_xmlhttprequest()
573
return new XMLHttpRequest();
577
/* Internet Explorer */
580
return new ActiveXObject("Msxml2.XMLHTTP");
586
return new ActiveXObject("Microsoft.XMLHTTP");
590
throw("Your browser does not support AJAX. "
591
+ "IVLE requires a modern browser.");
597
/** Creates a random string of length length,
598
* consisting of alphanumeric characters.
600
var rand_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZ"
601
+ "abcdefghiklmnopqrstuvwxyz";
602
function random_string(length)
604
var str = Array(length);
606
for (var i=0; i<length; i++)
608
v = Math.floor(Math.random() * rand_chars.length);
609
str[i] = rand_chars.charAt(v);
614
/** Makes an XMLHttpRequest call to the server.
615
* Sends the XMLHttpRequest object containing the completed response to a
616
* specified callback function.
412
/** Makes an XMLHttpRequest call to the server. Waits (synchronously) for a
413
* response, and returns an XMLHttpRequest object containing the completed
618
* \param callback A callback function. Will be called when the response is
619
* complete. Passed 1 parameter, an XMLHttpRequest object containing the
620
* completed response. If callback is null this is a syncronous request
621
* otherwise this is an asynchronous request.
622
416
* \param app IVLE app to call (such as "fileservice").
623
417
* \param path URL path to make the request to, within the application.
624
418
* \param args Argument object, as described in parse_url and friends.
626
420
* \param content_type String, optional. Only applies if method is "POST".
627
421
* May be "application/x-www-form-urlencoded" or "multipart/form-data".
628
422
* Defaults to "application/x-www-form-urlencoded".
423
* \return An XMLHttpRequest object containing the completed response.
630
function ajax_call(callback, app, path, args, method, content_type)
425
function ajax_call(app, path, args, method, content_type)
632
427
if (content_type != "multipart/form-data")
633
428
content_type = "application/x-www-form-urlencoded";
634
path = app_path(app, path);
429
path = make_path(path_join(app, path));
636
431
/* A random string, for multipart/form-data
637
432
* (This is not checked against anywhere else, it is solely defined and
638
433
* used within this function) */
639
var boundary = random_string(20);
640
var xhr = new_xmlhttprequest();
641
var asyncronous = callback != null;
644
xhr.onreadystatechange = function()
646
if (xhr.readyState == 4)
434
var boundary = "48234n334nu7n4n2ynonjn234t683jyh80j";
435
var xhr = new XMLHttpRequest();
652
436
if (method == "GET")
654
438
/* GET sends the args in the URL */
655
439
url = build_url({"path": path, "args": args});
656
/* open's 3rd argument = true -> asynchronous */
657
xhr.open(method, url, asyncronous);
440
/* open's 3rd argument = false -> SYNCHRONOUS (wait for response)
441
* (No need for a callback function) */
442
xhr.open(method, url, false);
662
447
/* POST sends the args in application/x-www-form-urlencoded */
663
448
url = encodeURI(path);
664
xhr.open(method, url, asyncronous);
449
xhr.open(method, url, false);
666
451
if (content_type == "multipart/form-data")
668
453
xhr.setRequestHeader("Content-Type",
669
"multipart/form-data; boundary=" + boundary);
454
"multipart/form-data, boundary=" + boundary);
670
455
message = make_multipart_formdata(args, boundary);
added
removed
www/media/common/util.js
