107 lines
3.0 KiB
JavaScript
107 lines
3.0 KiB
JavaScript
(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);
|