34
40
/** Creates a DOM element with simple text inside it.
35
41
* \param tagname String. Name of the element's tag (eg. "p").
36
42
* \param text String. Text to be placed inside the element.
43
* \param title String, optional. Tooltip for the text.
44
* (Note, title creates a span element around the text).
37
45
* \return DOM Element object.
39
function dom_make_text_elem(tagname, text)
47
function dom_make_text_elem(tagname, text, title)
49
if (text == null) text = "";
41
50
var elem = document.createElement(tagname);
42
elem.appendChild(document.createTextNode(text));
53
textnode = document.createTextNode(text);
56
textnode = document.createElement("span");
57
textnode.setAttribute("title", title);
58
textnode.appendChild(document.createTextNode(text));
60
elem.appendChild(textnode);
46
64
/** Creates a DOM element with hyperlinked text inside it.
47
65
* \param tagname String. Name of the element's tag (eg. "p").
48
66
* \param text String. Text to be placed inside the element.
67
* \param title String, optional. Sets a tooltip for the link.
49
68
* \param href String. URL the text will link to. This is a raw string,
50
69
* it will automatically be URL-encoded.
51
70
* \param onclick Optional string. Will be set as the "onclick" attribute
52
71
* of the "a" element.
53
72
* \return DOM Element object.
55
function dom_make_link_elem(tagname, text, href, onclick)
74
function dom_make_link_elem(tagname, text, title, href, onclick)
76
if (text == null) text = "";
77
if (href == null) href = "";
57
78
var elem = document.createElement(tagname);
58
79
var link = document.createElement("a");
59
link.setAttribute("href", encodeURI(href));
80
link.setAttribute("href", urlencode_path(href));
82
link.setAttribute("title", title);
60
83
if (onclick != null)
61
84
link.setAttribute("onclick", onclick);
62
85
link.appendChild(document.createTextNode(text));
90
/** Creates a DOM img element. All parameters are optional except src.
91
* If alt (compulsory in HTML) is omitted, will be set to "".
93
function dom_make_img(src, width, height, title, alt)
95
var img = document.createElement("img");
96
img.setAttribute("src", src);
98
img.setAttribute("width", width);
100
img.setAttribute("height", height);
102
img.setAttribute("title", title);
103
if (alt == null) alt = "";
104
img.setAttribute("alt", alt);
108
/** Given a number of bytes, returns a string representing the file size in a
109
* human-readable format.
110
* eg. nice_filesize(6) -> "6 bytes"
111
* nice_filesize(81275) -> "79.4 kB"
112
* nice_filesize(13498346) -> "12.9 MB"
113
* \param bytes Number of bytes. Must be an integer.
116
function nice_filesize(bytes)
118
if (bytes == null) return "";
121
return bytes.toString() + " B";
124
return size.toFixed(1) + " kB";
127
return size.toFixed(1) + " MB";
129
return size.toFixed(1) + " GB";
67
132
/** Given a URL, returns an object containing a number of attributes
68
133
* describing the components of the URL, similar to CGI request variables.
69
134
* The object has the following attributes:
84
149
* args is never null, though it may be empty.
86
151
* All strings are decoded/unescaped. Reserved characters
87
* (; , / ? : @ & = + * $) are not decoded except in args.
152
* (; , / ? : @ & = + * $) are not decoded except in args and path.
89
154
* \param url String. A URL. To read from the current browser window, use
90
155
* window.location.href.
242
306
url += ":" + obj.server_port.toString();
243
307
if (("path" in obj) && obj.path != null)
245
var path = obj.path.toString();
309
var path = urlencode_path(obj.path.toString());
246
310
if (url.length > 0 && path.length > 0 && path[0] != "/")
247
311
path = "/" + path;
250
314
if (("query_string" in obj) && obj.query_string != null)
251
query_string = obj.query_string.toString();
315
query_string = encodeURI(obj.query_string.toString());
252
316
else if (("args" in obj) && obj.args != null)
253
317
query_string = make_query_string(obj.args);
255
319
if (query_string != null)
256
320
url += "?" + query_string;
258
return encodeURI(url);
325
/** URL-encodes a path. This is a special case of URL encoding as all
326
* characters *except* the slash must be encoded.
328
function urlencode_path(path)
330
/* Split up the path, URLEncode each segment with encodeURIComponent,
333
var split = path.split('/');
334
for (var i=0; i<split.length; i++)
335
split[i] = encodeURIComponent(split[i]);
336
path = path_join.apply(null, split);
337
if (split[0] == "") path = "/" + path;
261
341
/** Given an argument map, as output in the args parameter of the return of
404
/** Builds a multipart_formdata string from an args object. Similar to
405
* make_query_string, but it returns data of type "multipart/form-data"
406
* instead of "application/x-www-form-urlencoded". This is good for
407
* encoding large strings such as text objects from the editor.
408
* Should be written with a Content-Type of
409
* "multipart/form-data, boundary=<boundary>".
410
* All fields are sent with a Content-Type of text/plain.
411
* \param args Args object as described in parse_url.
412
* \param boundary Random "magic" string which DOES NOT appear in any of
413
* the argument values. This should match the "boundary=" value written to
414
* the Content-Type header.
415
* \return String in multipart/form-data format.
417
function make_multipart_formdata(args, boundary)
422
var extend_data = function(arg_key, arg_val)
424
/* FIXME: Encoding not supported here (should not matter if we
425
* only use ASCII names */
426
data += "--" + boundary + "\n"
427
+ "Content-Disposition: form-data; name=\"" + arg_key
432
for (var arg_key in args)
434
arg_val = args[arg_key];
435
if (arg_val instanceof Array)
436
for (var i=0; i<arg_val.length; i++)
438
extend_data(arg_key, arg_val[i]);
441
extend_data(arg_key, arg_val);
444
data += "--" + boundary + "--\n";
323
449
/** Converts a list of directories into a path name, with a slash at the end.
324
450
* \param pathlist List of strings.
325
451
* \return String.
340
466
return path_join(root_dir, path);
469
/** Shorthand for make_path(path_join(app, ...))
470
* Creates an absolute path for a given path within a given app.
472
function app_path(app /*,...*/)
474
return make_path(path_join.apply(null, arguments));
477
/** Given a path, gets the "basename" (the last path segment).
479
function path_basename(path)
481
segments = path.split("/");
482
if (segments[segments.length-1].length == 0)
483
return segments[segments.length-2];
485
return segments[segments.length-1];
488
/** Given a string str, determines whether it ends with substr */
489
function endswith(str, substring)
491
if (str.length < substring.length) return false;
492
return str.substr(str.length - substring.length) == substring;
495
/** Equivalent to Python's repr.
496
* Gets the JavaScript string representation.
497
* Actually just calls JSON.stringify.
501
return JSON.stringify(str);
343
504
/** Makes an XMLHttpRequest call to the server. Waits (synchronously) for a
344
505
* response, and returns an XMLHttpRequest object containing the completed
348
509
* \param path URL path to make the request to, within the application.
349
510
* \param args Argument object, as described in parse_url and friends.
350
511
* \param method String; "GET" or "POST"
512
* \param content_type String, optional. Only applies if method is "POST".
513
* May be "application/x-www-form-urlencoded" or "multipart/form-data".
514
* Defaults to "application/x-www-form-urlencoded".
351
515
* \return An XMLHttpRequest object containing the completed response.
353
function ajax_call(app, path, args, method)
517
function ajax_call(app, path, args, method, content_type)
355
path = make_path(path_join(app, path));
519
if (content_type != "multipart/form-data")
520
content_type = "application/x-www-form-urlencoded";
521
path = app_path(app, path);
523
/* A random string, for multipart/form-data
524
* (This is not checked against anywhere else, it is solely defined and
525
* used within this function) */
526
var boundary = "48234n334nu7n4n2ynonjn234t683jyh80j";
357
527
var xhr = new XMLHttpRequest();
358
528
if (method == "GET")
362
532
/* open's 3rd argument = false -> SYNCHRONOUS (wait for response)
363
533
* (No need for a callback function) */
364
534
xhr.open(method, url, false);
369
539
/* POST sends the args in application/x-www-form-urlencoded */
370
540
url = encodeURI(path);
371
541
xhr.open(method, url, false);
372
xhr.setRequestHeader("Content-Type",
373
"application/x-www-form-urlencoded");
374
var message = make_query_string(args);
543
if (content_type == "multipart/form-data")
545
xhr.setRequestHeader("Content-Type",
546
"multipart/form-data, boundary=" + boundary);
547
message = make_multipart_formdata(args, boundary);
551
xhr.setRequestHeader("Content-Type", content_type);
552
message = make_query_string(args);
375
554
xhr.send(message);