1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
(function ($) {
/**
* A progressbar object. Initialized with the given id. Must be inserted into
* the DOM afterwards through progressBar.element.
*
* method is the function which will perform the HTTP request to get the
* progress bar state. Either "GET" or "POST".
*
* e.g. pb = new progressBar('myProgressBar');
* some_element.appendChild(pb.element);
*/
Drupal.progressBar = function (id, updateCallback, method, errorCallback) {
var pb = this;
this.id = id;
this.method = method || 'GET';
this.updateCallback = updateCallback;
this.errorCallback = errorCallback;
// The WAI-ARIA setting aria-live="polite" will announce changes after users
// have completed their current activity and not interrupt the screen reader.
this.element = $('<div class="progress" aria-live="polite"></div>').attr('id', id);
this.element.html('<div class="bar"><div class="filled"></div></div>' +
'<div class="percentage"></div>' +
'<div class="message"> </div>');
};
/**
* Set the percentage and status message for the progressbar.
*/
Drupal.progressBar.prototype.setProgress = function (percentage, message) {
if (percentage >= 0 && percentage <= 100) {
$('div.filled', this.element).css('width', percentage + '%');
$('div.percentage', this.element).html(percentage + '%');
}
$('div.message', this.element).html(message);
if (this.updateCallback) {
this.updateCallback(percentage, message, this);
}
};
/**
* Start monitoring progress via Ajax.
*/
Drupal.progressBar.prototype.startMonitoring = function (uri, delay) {
this.delay = delay;
this.uri = uri;
this.sendPing();
};
/**
* Stop monitoring progress via Ajax.
*/
Drupal.progressBar.prototype.stopMonitoring = function () {
clearTimeout(this.timer);
// This allows monitoring to be stopped from within the callback.
this.uri = null;
};
/**
* Request progress data from server.
*/
Drupal.progressBar.prototype.sendPing = function () {
if (this.timer) {
clearTimeout(this.timer);
}
if (this.uri) {
var pb = this;
// When doing a post request, you need non-null data. Otherwise a
// HTTP 411 or HTTP 406 (with Apache mod_security) error may result.
$.ajax({
type: this.method,
url: this.uri,
data: '',
dataType: 'json',
success: function (progress) {
// Display errors.
if (progress.status == 0) {
pb.displayError(progress.data);
return;
}
// Update display.
pb.setProgress(progress.percentage, progress.message);
// Schedule next timer.
pb.timer = setTimeout(function () { pb.sendPing(); }, pb.delay);
},
error: function (xmlhttp) {
pb.displayError(Drupal.ajaxError(xmlhttp, pb.uri));
}
});
}
};
/**
* Display errors on the page.
*/
Drupal.progressBar.prototype.displayError = function (string) {
var error = $('<div class="messages error"></div>').html(string);
$(this.element).before(error).hide();
if (this.errorCallback) {
this.errorCallback(this);
}
};
})(jQuery);
|
