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// $Id$
/**
* Provides AJAX-like page updating via AHAH (Asynchronous HTML and HTTP).
*
* AHAH is a method of making a request via Javascript while viewing an HTML
* page. The request returns a small chunk of HTML, which is then directly
* injected into the page.
*
* Drupal uses this file to enhance form elements with #ahah[path] and
* #ahah[wrapper] properties. If set, this file will automatically be included
* to provide AHAH capabilities.
*/
/**
* Attaches the ahah behavior to each ahah form element.
*/
Drupal.behaviors.ahah = function(context) {
for (var base in Drupal.settings.ahah) {
if (!$('#'+ base + '.ahah-processed').size()) {
var element_settings = Drupal.settings.ahah[base];
$(element_settings.selector).each(function() {
element_settings.element = this;
var ahah = new Drupal.ahah(base, element_settings);
});
$('#'+ base).addClass('ahah-processed');
}
}
};
/**
* AHAH object.
*/
Drupal.ahah = function(base, element_settings) {
// Set the properties for this object.
this.element = element_settings.element;
this.selector = element_settings.selector;
this.event = element_settings.event;
this.url = element_settings.url;
this.wrapper = '#'+ element_settings.wrapper;
this.effect = element_settings.effect;
this.method = element_settings.method;
this.progress = element_settings.progress;
this.button = element_settings.button || { };
if (this.effect == 'none') {
this.showEffect = 'show';
this.hideEffect = 'hide';
this.showSpeed = '';
}
else if (this.effect == 'fade') {
this.showEffect = 'fadeIn';
this.hideEffect = 'fadeOut';
this.showSpeed = 'slow';
}
else {
this.showEffect = this.effect + 'Toggle';
this.hideEffect = this.effect + 'Toggle';
this.showSpeed = 'slow';
}
// Record the form action and target, needed for iFrame file uploads.
var form = $(this.element).parents('form');
this.form_action = form.attr('action');
this.form_target = form.attr('target');
this.form_encattr = form.attr('encattr');
// Set the options for the ajaxSubmit function.
// The 'this' variable will not persist inside of the options object.
var ahah = this;
var options = {
url: ahah.url,
data: ahah.button,
beforeSubmit: function(form_values, element_settings, options) {
return ahah.beforeSubmit(form_values, element_settings, options);
},
success: function(response, status) {
// Sanity check for browser support (object expected).
// When using iFrame uploads, responses must be returned as a string.
if (typeof(response) == 'string') {
response = Drupal.parseJson(response);
}
return ahah.success(response, status);
},
complete: function(response, status) {
if (status == 'error') {
return ahah.error(response.responseText);
}
},
dataType: 'json',
type: 'POST'
};
// Bind the ajaxSubmit function to the element event.
$(element_settings.element).bind(element_settings.event, function() {
$(element_settings.element).parents('form').ajaxSubmit(options);
return false;
});
};
/**
* Handler for the form redirection submission.
*/
Drupal.ahah.prototype.beforeSubmit = function (form_values, element, options) {
// Disable the element that received the change.
$(this.element).addClass('progress-disabled').attr('disabled', true);
// Insert progressbar or throbber.
if (this.progress.type == 'bar') {
var progressBar = new Drupal.progressBar('ahah-progress-' + this.element.id, eval(this.progress.update_callback), this.progress.method, eval(this.progress.error_callback));
if (this.progress.message) {
progressBar.setProgress(-1, this.progress.message);
}
if (this.progress.url) {
progressBar.startMonitoring(this.progress.url, this.progress.interval || 1500);
}
this.progress.element = $(progressBar.element).addClass('ahah-progress ahah-progress-bar');
this.progress.object = progressBar;
$(this.element).after(this.progress.element);
}
else if (this.progress.type == 'throbber') {
this.progress.element = $('<div class="ahah-progress ahah-progress-throbber"><div class="throbber"> </div></div>');
if (this.progress.message) {
$('.throbber', this.progress.element).after('<div class="message">' + this.progress.message + '</div>')
}
$(this.element).after(this.progress.element);
}
};
/**
* Handler for the form redirection completion.
*/
Drupal.ahah.prototype.success = function (response, status) {
var wrapper = $(this.wrapper);
var form = $(this.element).parents('form');
// Manually insert HTML into the jQuery object, using $() directly crashes
// Safari with long string lengths. http://dev.jquery.com/ticket/1152
var new_content = $('<div></div>').html(response.data);
// Restore the previous action and target to the form.
form.attr('action', this.form_action);
this.form_target ? form.attr('target', this.form_target) : form.removeAttr('target');
this.form_encattr ? form.attr('target', this.form_encattr) : form.removeAttr('encattr');
// Remove the progress element.
if (this.progress.element) {
$(this.progress.element).remove();
}
if (this.progress.object) {
this.progress.object.stopMonitoring();
}
$(this.element).removeClass('progress-disabled').attr('disabled', false);
// Add the new content to the page.
Drupal.freezeHeight();
if (this.method == 'replace') {
wrapper.empty().append(new_content);
}
else {
wrapper[this.method](new_content);
}
// Immediately hide the new content if we're using any effects.
if (this.showEffect != 'show') {
new_content.hide();
}
// Determine what effect use and what content will receive the effect, then
// show the new content. For browser compatibility, Safari is excluded from
// using effects on table rows.
if (($.browser.safari && $("tr.ahah-new-content", new_content).size() > 0)) {
new_content.show();
}
else if ($('.ahah-new-content', new_content).size() > 0) {
$('.ahah-new-content', new_content).hide();
new_content.show();
$(".ahah-new-content", new_content)[this.showEffect](this.showSpeed);
}
else if (this.showEffect != 'show') {
new_content[this.showEffect](this.showSpeed);
}
// Attach all javascript behaviors to the new content, if it was successfully
// added to the page, this if statement allows #ahah[wrapper] to be optional.
if (new_content.parents('html').length > 0) {
Drupal.attachBehaviors(new_content);
}
Drupal.unfreezeHeight();
};
/**
* Handler for the form redirection error.
*/
Drupal.ahah.prototype.error = function (error) {
alert(Drupal.t('An error occurred:\n\n@error', { '@error': error }));
// Resore the previous action and target to the form.
element.parent('form').attr( { action: this.form_action, target: this.form_target} );
// Remove the progress element.
if (this.progress.element) {
$(this.progress.element).remove();
}
if (this.progress.object) {
this.progress.object.stopMonitoring();
}
// Undo hide.
$(this.wrapper).show();
// Re-enable the element.
$(this.element).removeClass('progess-disabled').attr('disabled', false);
};
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