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(function ($) {
/**
* Provides Ajax page updating via jQuery $.ajax (Asynchronous JavaScript and XML).
*
* Ajax is a method of making a request via JavaScript while viewing an HTML
* page. The request returns an array of commands encoded in JSON, which is
* then executed to make any changes that are necessary to the page.
*
* Drupal uses this file to enhance form elements with #ajax['path'] and
* #ajax['wrapper'] properties. If set, this file will automatically be included
* to provide Ajax capabilities.
*/
Drupal.ajax = Drupal.ajax || {};
Drupal.settings.urlIsAjaxTrusted = Drupal.settings.urlIsAjaxTrusted || {};
/**
* Attaches the Ajax behavior to each Ajax form element.
*/
Drupal.behaviors.AJAX = {
attach: function (context, settings) {
// Load all Ajax behaviors specified in the settings.
for (var base in settings.ajax) {
if (!$('#' + base + '.ajax-processed').length) {
var element_settings = settings.ajax[base];
if (typeof element_settings.selector == 'undefined') {
element_settings.selector = '#' + base;
}
$(element_settings.selector).each(function () {
element_settings.element = this;
Drupal.ajax[base] = new Drupal.ajax(base, this, element_settings);
});
$('#' + base).addClass('ajax-processed');
}
}
// Bind Ajax behaviors to all items showing the class.
$('.use-ajax:not(.ajax-processed)').addClass('ajax-processed').each(function () {
var element_settings = {};
// Clicked links look better with the throbber than the progress bar.
element_settings.progress = { 'type': 'throbber' };
// For anchor tags, these will go to the target of the anchor rather
// than the usual location.
if ($(this).attr('href')) {
element_settings.url = $(this).attr('href');
element_settings.event = 'click';
}
var base = $(this).attr('id');
Drupal.ajax[base] = new Drupal.ajax(base, this, element_settings);
});
// This class means to submit the form to the action using Ajax.
$('.use-ajax-submit:not(.ajax-processed)').addClass('ajax-processed').each(function () {
var element_settings = {};
// Ajax submits specified in this manner automatically submit to the
// normal form action.
element_settings.url = $(this.form).attr('action');
// Form submit button clicks need to tell the form what was clicked so
// it gets passed in the POST request.
element_settings.setClick = true;
// Form buttons use the 'click' event rather than mousedown.
element_settings.event = 'click';
// Clicked form buttons look better with the throbber than the progress bar.
element_settings.progress = { 'type': 'throbber' };
var base = $(this).attr('id');
Drupal.ajax[base] = new Drupal.ajax(base, this, element_settings);
});
}
};
/**
* Ajax object.
*
* All Ajax objects on a page are accessible through the global Drupal.ajax
* object and are keyed by the submit button's ID. You can access them from
* your module's JavaScript file to override properties or functions.
*
* For example, if your Ajax enabled button has the ID 'edit-submit', you can
* redefine the function that is called to insert the new content like this
* (inside a Drupal.behaviors attach block):
* @code
* Drupal.behaviors.myCustomAJAXStuff = {
* attach: function (context, settings) {
* Drupal.ajax['edit-submit'].commands.insert = function (ajax, response, status) {
* new_content = $(response.data);
* $('#my-wrapper').append(new_content);
* alert('New content was appended to #my-wrapper');
* }
* }
* };
* @endcode
*/
Drupal.ajax = function (base, element, element_settings) {
var defaults = {
url: 'system/ajax',
event: 'mousedown',
keypress: true,
selector: '#' + base,
effect: 'none',
speed: 'none',
method: 'replaceWith',
progress: {
type: 'throbber',
message: Drupal.t('Please wait...')
},
submit: {
'js': true
}
};
$.extend(this, defaults, element_settings);
this.element = element;
this.element_settings = element_settings;
// Replacing 'nojs' with 'ajax' in the URL allows for an easy method to let
// the server detect when it needs to degrade gracefully.
// There are five scenarios to check for:
// 1. /nojs/
// 2. /nojs$ - The end of a URL string.
// 3. /nojs? - Followed by a query (with clean URLs enabled).
// E.g.: path/nojs?destination=foobar
// 4. /nojs& - Followed by a query (without clean URLs enabled).
// E.g.: ?q=path/nojs&destination=foobar
// 5. /nojs# - Followed by a fragment.
// E.g.: path/nojs#myfragment
this.url = element_settings.url.replace(/\/nojs(\/|$|\?|&|#)/g, '/ajax$1');
// If the 'nojs' version of the URL is trusted, also trust the 'ajax' version.
if (Drupal.settings.urlIsAjaxTrusted[element_settings.url]) {
Drupal.settings.urlIsAjaxTrusted[this.url] = true;
}
this.wrapper = '#' + element_settings.wrapper;
// If there isn't a form, jQuery.ajax() will be used instead, allowing us to
// bind Ajax to links as well.
if (this.element.form) {
this.form = $(this.element.form);
}
// Set the options for the ajaxSubmit function.
// The 'this' variable will not persist inside of the options object.
var ajax = this;
ajax.options = {
url: ajax.url,
data: ajax.submit,
beforeSerialize: function (element_settings, options) {
return ajax.beforeSerialize(element_settings, options);
},
beforeSubmit: function (form_values, element_settings, options) {
ajax.ajaxing = true;
return ajax.beforeSubmit(form_values, element_settings, options);
},
beforeSend: function (xmlhttprequest, options) {
ajax.ajaxing = true;
return ajax.beforeSend(xmlhttprequest, options);
},
success: function (response, status, xmlhttprequest) {
// Sanity check for browser support (object expected).
// When using iFrame uploads, responses must be returned as a string.
if (typeof response == 'string') {
response = $.parseJSON(response);
}
// Prior to invoking the response's commands, verify that they can be
// trusted by checking for a response header. See
// ajax_set_verification_header() for details.
// - Empty responses are harmless so can bypass verification. This avoids
// an alert message for server-generated no-op responses that skip Ajax
// rendering.
// - Ajax objects with trusted URLs (e.g., ones defined server-side via
// #ajax) can bypass header verification. This is especially useful for
// Ajax with multipart forms. Because IFRAME transport is used, the
// response headers cannot be accessed for verification.
if (response !== null && !Drupal.settings.urlIsAjaxTrusted[ajax.url]) {
if (xmlhttprequest.getResponseHeader('X-Drupal-Ajax-Token') !== '1') {
var customMessage = Drupal.t("The response failed verification so will not be processed.");
return ajax.error(xmlhttprequest, ajax.url, customMessage);
}
}
return ajax.success(response, status);
},
complete: function (xmlhttprequest, status) {
ajax.ajaxing = false;
if (status == 'error' || status == 'parsererror') {
return ajax.error(xmlhttprequest, ajax.url);
}
},
dataType: 'json',
type: 'POST'
};
// Bind the ajaxSubmit function to the element event.
$(ajax.element).bind(element_settings.event, function (event) {
if (!Drupal.settings.urlIsAjaxTrusted[ajax.url] && !Drupal.urlIsLocal(ajax.url)) {
throw new Error(Drupal.t('The callback URL is not local and not trusted: !url', {'!url': ajax.url}));
}
return ajax.eventResponse(this, event);
});
// If necessary, enable keyboard submission so that Ajax behaviors
// can be triggered through keyboard input as well as e.g. a mousedown
// action.
if (element_settings.keypress) {
$(ajax.element).keypress(function (event) {
return ajax.keypressResponse(this, event);
});
}
// If necessary, prevent the browser default action of an additional event.
// For example, prevent the browser default action of a click, even if the
// AJAX behavior binds to mousedown.
if (element_settings.prevent) {
$(ajax.element).bind(element_settings.prevent, false);
}
};
/**
* Handle a key press.
*
* The Ajax object will, if instructed, bind to a key press response. This
* will test to see if the key press is valid to trigger this event and
* if it is, trigger it for us and prevent other keypresses from triggering.
* In this case we're handling RETURN and SPACEBAR keypresses (event codes 13
* and 32. RETURN is often used to submit a form when in a textfield, and
* SPACE is often used to activate an element without submitting.
*/
Drupal.ajax.prototype.keypressResponse = function (element, event) {
// Create a synonym for this to reduce code confusion.
var ajax = this;
// Detect enter key and space bar and allow the standard response for them,
// except for form elements of type 'text' and 'textarea', where the
// spacebar activation causes inappropriate activation if #ajax['keypress'] is
// TRUE. On a text-type widget a space should always be a space.
if (event.which == 13 || (event.which == 32 && element.type != 'text' && element.type != 'textarea')) {
$(ajax.element_settings.element).trigger(ajax.element_settings.event);
return false;
}
};
/**
* Handle an event that triggers an Ajax response.
*
* When an event that triggers an Ajax response happens, this method will
* perform the actual Ajax call. It is bound to the event using
* bind() in the constructor, and it uses the options specified on the
* ajax object.
*/
Drupal.ajax.prototype.eventResponse = function (element, event) {
// Create a synonym for this to reduce code confusion.
var ajax = this;
// Do not perform another ajax command if one is already in progress.
if (ajax.ajaxing) {
return false;
}
try {
if (ajax.form) {
// If setClick is set, we must set this to ensure that the button's
// value is passed.
if (ajax.setClick) {
// Mark the clicked button. 'form.clk' is a special variable for
// ajaxSubmit that tells the system which element got clicked to
// trigger the submit. Without it there would be no 'op' or
// equivalent.
element.form.clk = element;
}
ajax.form.ajaxSubmit(ajax.options);
}
else {
ajax.beforeSerialize(ajax.element, ajax.options);
$.ajax(ajax.options);
}
}
catch (e) {
// Unset the ajax.ajaxing flag here because it won't be unset during
// the complete response.
ajax.ajaxing = false;
alert("An error occurred while attempting to process " + ajax.options.url + ": " + e.message);
}
// For radio/checkbox, allow the default event. On IE, this means letting
// it actually check the box.
if (typeof element.type != 'undefined' && (element.type == 'checkbox' || element.type == 'radio')) {
return true;
}
else {
return false;
}
};
/**
* Handler for the form serialization.
*
* Runs before the beforeSend() handler (see below), and unlike that one, runs
* before field data is collected.
*/
Drupal.ajax.prototype.beforeSerialize = function (element, options) {
// Allow detaching behaviors to update field values before collecting them.
// This is only needed when field values are added to the POST data, so only
// when there is a form such that this.form.ajaxSubmit() is used instead of
// $.ajax(). When there is no form and $.ajax() is used, beforeSerialize()
// isn't called, but don't rely on that: explicitly check this.form.
if (this.form) {
var settings = this.settings || Drupal.settings;
Drupal.detachBehaviors(this.form, settings, 'serialize');
}
// Prevent duplicate HTML ids in the returned markup.
// @see drupal_html_id()
options.data['ajax_html_ids[]'] = [];
$('[id]').each(function () {
options.data['ajax_html_ids[]'].push(this.id);
});
// Allow Drupal to return new JavaScript and CSS files to load without
// returning the ones already loaded.
// @see ajax_base_page_theme()
// @see drupal_get_css()
// @see drupal_get_js()
options.data['ajax_page_state[theme]'] = Drupal.settings.ajaxPageState.theme;
options.data['ajax_page_state[theme_token]'] = Drupal.settings.ajaxPageState.theme_token;
for (var key in Drupal.settings.ajaxPageState.css) {
options.data['ajax_page_state[css][' + key + ']'] = 1;
}
for (var key in Drupal.settings.ajaxPageState.js) {
options.data['ajax_page_state[js][' + key + ']'] = 1;
}
};
/**
* Modify form values prior to form submission.
*/
Drupal.ajax.prototype.beforeSubmit = function (form_values, element, options) {
// This function is left empty to make it simple to override for modules
// that wish to add functionality here.
};
/**
* Prepare the Ajax request before it is sent.
*/
Drupal.ajax.prototype.beforeSend = function (xmlhttprequest, options) {
// For forms without file inputs, the jQuery Form plugin serializes the form
// values, and then calls jQuery's $.ajax() function, which invokes this
// handler. In this circumstance, options.extraData is never used. For forms
// with file inputs, the jQuery Form plugin uses the browser's normal form
// submission mechanism, but captures the response in a hidden IFRAME. In this
// circumstance, it calls this handler first, and then appends hidden fields
// to the form to submit the values in options.extraData. There is no simple
// way to know which submission mechanism will be used, so we add to extraData
// regardless, and allow it to be ignored in the former case.
if (this.form) {
options.extraData = options.extraData || {};
// Let the server know when the IFRAME submission mechanism is used. The
// server can use this information to wrap the JSON response in a TEXTAREA,
// as per http://jquery.malsup.com/form/#file-upload.
options.extraData.ajax_iframe_upload = '1';
// The triggering element is about to be disabled (see below), but if it
// contains a value (e.g., a checkbox, textfield, select, etc.), ensure that
// value is included in the submission. As per above, submissions that use
// $.ajax() are already serialized prior to the element being disabled, so
// this is only needed for IFRAME submissions.
var v = $.fieldValue(this.element);
if (v !== null) {
options.extraData[this.element.name] = Drupal.checkPlain(v);
}
}
// Disable the element that received the change to prevent user interface
// interaction while the Ajax request is in progress. ajax.ajaxing prevents
// the element from triggering a new request, but does not prevent the user
// from changing its value.
$(this.element).addClass('progress-disabled').attr('disabled', true);
// Insert progressbar or throbber.
if (this.progress.type == 'bar') {
var progressBar = new Drupal.progressBar('ajax-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('ajax-progress ajax-progress-bar');
this.progress.object = progressBar;
$(this.element).after(this.progress.element);
}
else if (this.progress.type == 'throbber') {
this.progress.element = $('<div class="ajax-progress ajax-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.ajax.prototype.success = function (response, status) {
// 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').removeAttr('disabled');
Drupal.freezeHeight();
for (var i in response) {
if (response.hasOwnProperty(i) && response[i]['command'] && this.commands[response[i]['command']]) {
this.commands[response[i]['command']](this, response[i], status);
}
}
// Reattach behaviors, if they were detached in beforeSerialize(). The
// attachBehaviors() called on the new content from processing the response
// commands is not sufficient, because behaviors from the entire form need
// to be reattached.
if (this.form) {
var settings = this.settings || Drupal.settings;
Drupal.attachBehaviors(this.form, settings);
}
Drupal.unfreezeHeight();
// Remove any response-specific settings so they don't get used on the next
// call by mistake.
this.settings = null;
};
/**
* Build an effect object which tells us how to apply the effect when adding new HTML.
*/
Drupal.ajax.prototype.getEffect = function (response) {
var type = response.effect || this.effect;
var speed = response.speed || this.speed;
var effect = {};
if (type == 'none') {
effect.showEffect = 'show';
effect.hideEffect = 'hide';
effect.showSpeed = '';
}
else if (type == 'fade') {
effect.showEffect = 'fadeIn';
effect.hideEffect = 'fadeOut';
effect.showSpeed = speed;
}
else {
effect.showEffect = type + 'Toggle';
effect.hideEffect = type + 'Toggle';
effect.showSpeed = speed;
}
return effect;
};
/**
* Handler for the form redirection error.
*/
Drupal.ajax.prototype.error = function (xmlhttprequest, uri, customMessage) {
alert(Drupal.ajaxError(xmlhttprequest, uri, customMessage));
// 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('progress-disabled').removeAttr('disabled');
// Reattach behaviors, if they were detached in beforeSerialize().
if (this.form) {
var settings = this.settings || Drupal.settings;
Drupal.attachBehaviors(this.form, settings);
}
};
/**
* Provide a series of commands that the server can request the client perform.
*/
Drupal.ajax.prototype.commands = {
/**
* Command to insert new content into the DOM.
*/
insert: function (ajax, response, status) {
// Get information from the response. If it is not there, default to
// our presets.
var wrapper = response.selector ? $(response.selector) : $(ajax.wrapper);
var method = response.method || ajax.method;
var effect = ajax.getEffect(response);
// We don't know what response.data contains: it might be a string of text
// without HTML, so don't rely on jQuery correctly iterpreting
// $(response.data) as new HTML rather than a CSS selector. Also, if
// response.data contains top-level text nodes, they get lost with either
// $(response.data) or $('<div></div>').replaceWith(response.data).
var new_content_wrapped = $('<div></div>').html(response.data);
var new_content = new_content_wrapped.contents();
// For legacy reasons, the effects processing code assumes that new_content
// consists of a single top-level element. Also, it has not been
// sufficiently tested whether attachBehaviors() can be successfully called
// with a context object that includes top-level text nodes. However, to
// give developers full control of the HTML appearing in the page, and to
// enable Ajax content to be inserted in places where DIV elements are not
// allowed (e.g., within TABLE, TR, and SPAN parents), we check if the new
// content satisfies the requirement of a single top-level element, and
// only use the container DIV created above when it doesn't. For more
// information, please see http://drupal.org/node/736066.
if (new_content.length != 1 || new_content.get(0).nodeType != 1) {
new_content = new_content_wrapped;
}
// If removing content from the wrapper, detach behaviors first.
switch (method) {
case 'html':
case 'replaceWith':
case 'replaceAll':
case 'empty':
case 'remove':
var settings = response.settings || ajax.settings || Drupal.settings;
Drupal.detachBehaviors(wrapper, settings);
}
// Add the new content to the page.
wrapper[method](new_content);
// Immediately hide the new content if we're using any effects.
if (effect.showEffect != 'show') {
new_content.hide();
}
// Determine which effect to use and what content will receive the
// effect, then show the new content.
if ($('.ajax-new-content', new_content).length > 0) {
$('.ajax-new-content', new_content).hide();
new_content.show();
$('.ajax-new-content', new_content)[effect.showEffect](effect.showSpeed);
}
else if (effect.showEffect != 'show') {
new_content[effect.showEffect](effect.showSpeed);
}
// Attach all JavaScript behaviors to the new content, if it was successfully
// added to the page, this if statement allows #ajax['wrapper'] to be
// optional.
if (new_content.parents('html').length > 0) {
// Apply any settings from the returned JSON if available.
var settings = response.settings || ajax.settings || Drupal.settings;
Drupal.attachBehaviors(new_content, settings);
}
},
/**
* Command to remove a chunk from the page.
*/
remove: function (ajax, response, status) {
var settings = response.settings || ajax.settings || Drupal.settings;
Drupal.detachBehaviors($(response.selector), settings);
$(response.selector).remove();
},
/**
* Command to mark a chunk changed.
*/
changed: function (ajax, response, status) {
if (!$(response.selector).hasClass('ajax-changed')) {
$(response.selector).addClass('ajax-changed');
if (response.asterisk) {
$(response.selector).find(response.asterisk).append(' <span class="ajax-changed">*</span> ');
}
}
},
/**
* Command to provide an alert.
*/
alert: function (ajax, response, status) {
alert(response.text, response.title);
},
/**
* Command to provide the jQuery css() function.
*/
css: function (ajax, response, status) {
$(response.selector).css(response.argument);
},
/**
* Command to set the settings that will be used for other commands in this response.
*/
settings: function (ajax, response, status) {
if (response.merge) {
$.extend(true, Drupal.settings, response.settings);
}
else {
ajax.settings = response.settings;
}
},
/**
* Command to attach data using jQuery's data API.
*/
data: function (ajax, response, status) {
$(response.selector).data(response.name, response.value);
},
/**
* Command to apply a jQuery method.
*/
invoke: function (ajax, response, status) {
var $element = $(response.selector);
$element[response.method].apply($element, response.arguments);
},
/**
* Command to restripe a table.
*/
restripe: function (ajax, response, status) {
// :even and :odd are reversed because jQuery counts from 0 and
// we count from 1, so we're out of sync.
// Match immediate children of the parent element to allow nesting.
$('> tbody > tr:visible, > tr:visible', $(response.selector))
.removeClass('odd even')
.filter(':even').addClass('odd').end()
.filter(':odd').addClass('even');
},
/**
* Command to add css.
*
* Uses the proprietary addImport method if available as browsers which
* support that method ignore @import statements in dynamically added
* stylesheets.
*/
add_css: function (ajax, response, status) {
// Add the styles in the normal way.
$('head').prepend(response.data);
// Add imports in the styles using the addImport method if available.
var match, importMatch = /^@import url\("(.*)"\);$/igm;
if (document.styleSheets[0].addImport && importMatch.test(response.data)) {
importMatch.lastIndex = 0;
while (match = importMatch.exec(response.data)) {
document.styleSheets[0].addImport(match[1]);
}
}
},
/**
* Command to update a form's build ID.
*/
updateBuildId: function(ajax, response, status) {
$('input[name="form_build_id"][value="' + response['old'] + '"]').val(response['new']);
}
};
})(jQuery);