mirror of
https://github.com/cytopia/devilbox.git
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820 lines
28 KiB
JavaScript
820 lines
28 KiB
JavaScript
/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* This object handles ajax requests for pages. It also
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* handles the reloading of the main menu and scripts.
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*/
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var AJAX = {
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/**
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* @var bool active Whether we are busy
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*/
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active: false,
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/**
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* @var object source The object whose event initialized the request
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*/
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source: null,
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/**
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* @var function Callback to execute after a successful request
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* Used by PMA_commonFunctions from common.js
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*/
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_callback: function () {},
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/**
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* @var bool _debug Makes noise in your Firebug console
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*/
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_debug: false,
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/**
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* @var object $msgbox A reference to a jQuery object that links to a message
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* box that is generated by PMA_ajaxShowMessage()
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*/
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$msgbox: null,
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/**
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* Given the filename of a script, returns a hash to be
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* used to refer to all the events registered for the file
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*
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* @param string key The filename for which to get the event name
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*
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* @return int
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*/
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hash: function (key){
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/* http://burtleburtle.net/bob/hash/doobs.html#one */
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key += "";
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var len = key.length, hash=0, i=0;
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for (; i<len; ++i) {
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hash += key.charCodeAt(i);
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hash += (hash << 10);
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hash ^= (hash >> 6);
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}
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hash += (hash << 3);
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hash ^= (hash >> 11);
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hash += (hash << 15);
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return Math.abs(hash);
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},
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/**
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* Registers an onload event for a file
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*
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* @param string file The filename for which to register the event
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* @param function func The function to execute when the page is ready
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*
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* @return self For chaining
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*/
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registerOnload: function (file, func) {
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var eventName = 'onload_' + AJAX.hash(file);
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$(document).bind(eventName, func);
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this._debug && console.log(
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// no need to translate
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"Registered event " + eventName + " for file " + file
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);
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return this;
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},
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/**
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* Registers a teardown event for a file. This is useful to execute functions
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* that unbind events for page elements that are about to be removed.
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*
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* @param string file The filename for which to register the event
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* @param function func The function to execute when
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* the page is about to be torn down
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*
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* @return self For chaining
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*/
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registerTeardown: function (file, func) {
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var eventName = 'teardown_' + AJAX.hash(file);
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$(document).bind(eventName, func);
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this._debug && console.log(
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// no need to translate
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"Registered event " + eventName + " for file " + file
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);
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return this;
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},
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/**
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* Called when a page has finished loading, once for every
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* file that registered to the onload event of that file.
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*
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* @param string file The filename for which to fire the event
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*
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* @return void
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*/
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fireOnload: function (file) {
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var eventName = 'onload_' + AJAX.hash(file);
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$(document).trigger(eventName);
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this._debug && console.log(
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// no need to translate
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"Fired event " + eventName + " for file " + file
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);
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},
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/**
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* Called just before a page is torn down, once for every
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* file that registered to the teardown event of that file.
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*
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* @param string file The filename for which to fire the event
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*
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* @return void
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*/
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fireTeardown: function (file) {
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var eventName = 'teardown_' + AJAX.hash(file);
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$(document).triggerHandler(eventName);
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this._debug && console.log(
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// no need to translate
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"Fired event " + eventName + " for file " + file
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);
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},
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/**
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* Event handler for clicks on links and form submissions
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*
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* @param object e Event data
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*
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* @return void
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*/
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requestHandler: function (event) {
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// In some cases we don't want to handle the request here and either
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// leave the browser deal with it natively (e.g: file download)
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// or leave an existing ajax event handler present elsewhere deal with it
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var href = $(this).attr('href');
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if (typeof event != 'undefined' && (event.shiftKey || event.ctrlKey)) {
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return true;
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} else if ($(this).attr('target')) {
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return true;
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} else if ($(this).hasClass('ajax') || $(this).hasClass('disableAjax')) {
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return true;
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} else if (href && href.match(/^#/)) {
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return true;
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} else if (href && href.match(/^mailto/)) {
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return true;
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} else if ($(this).hasClass('ui-datepicker-next') ||
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$(this).hasClass('ui-datepicker-prev')
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) {
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return true;
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}
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if (typeof event != 'undefined') {
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event.preventDefault();
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event.stopImmediatePropagation();
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}
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if (AJAX.active == true) {
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// Silently bail out, there is already a request in progress.
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// TODO: save a reference to the request and cancel the old request
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// when the user requests something else. Something like this is
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// already implemented in the PMA_fastFilter object in navigation.js
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return false;
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}
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AJAX.source = $(this);
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$('html, body').animate({scrollTop: 0}, 'fast');
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var isLink = !! href || false;
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var url = isLink ? href : $(this).attr('action');
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var params = 'ajax_request=true&ajax_page_request=true';
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if (! isLink) {
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params += '&' + $(this).serialize();
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}
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// Add a list of menu hashes that we have in the cache to the request
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params += AJAX.cache.menus.getRequestParam();
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AJAX._debug && console.log("Loading: " + url); // no need to translate
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if (isLink) {
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AJAX.active = true;
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AJAX.$msgbox = PMA_ajaxShowMessage();
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$.get(url, params, AJAX.responseHandler);
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} else {
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/**
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* Manually fire the onsubmit event for the form, if any.
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* The event was saved in the jQuery data object by an onload
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* handler defined below. Workaround for bug #3583316
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*/
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var onsubmit = $(this).data('onsubmit');
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// Submit the request if there is no onsubmit handler
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// or if it returns a value that evaluates to true
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if (typeof onsubmit !== 'function' || onsubmit.apply(this, [event])) {
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AJAX.active = true;
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AJAX.$msgbox = PMA_ajaxShowMessage();
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$.post(url, params, AJAX.responseHandler);
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}
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}
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},
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/**
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* Called after the request that was initiated by this.requestHandler()
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* has completed successfully or with a caught error. For completely
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* failed requests or requests with uncaught errors, see the .ajaxError
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* handler at the bottom of this file.
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*
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* To refer to self use 'AJAX', instead of 'this' as this function
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* is called in the jQuery context.
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*
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* @param object e Event data
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*
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* @return void
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*/
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responseHandler: function (data) {
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if (data.success) {
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$table_clone = false;
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PMA_ajaxRemoveMessage(AJAX.$msgbox);
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if (data._redirect) {
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PMA_ajaxShowMessage(data._redirect, false);
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AJAX.active = false;
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return;
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}
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AJAX.scriptHandler.reset(function () {
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if (data._reloadNavigation) {
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PMA_reloadNavigation();
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}
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if (data._reloadQuerywindow) {
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var params = data._reloadQuerywindow;
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PMA_querywindow.reload(
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params.db,
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params.table,
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params.sql_query
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);
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}
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if (data._focusQuerywindow) {
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PMA_querywindow.focus(
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data._focusQuerywindow
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);
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}
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if (data._title) {
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$('title').replaceWith(data._title);
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}
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if (data._menu) {
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AJAX.cache.menus.replace(data._menu);
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AJAX.cache.menus.add(data._menuHash, data._menu);
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} else if (data._menuHash) {
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AJAX.cache.menus.replace(AJAX.cache.menus.get(data._menuHash));
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}
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// Remove all containers that may have
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// been added outside of #page_content
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$('body').children()
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.not('#pma_navigation')
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.not('#floating_menubar')
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.not('#goto_pagetop')
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.not('#page_content')
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.not('#selflink')
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.not('#session_debug')
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.remove();
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// Replace #page_content with new content
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if (data.message && data.message.length > 0) {
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$('#page_content').replaceWith(
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"<div id='page_content'>" + data.message + "</div>"
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);
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}
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if (data._selflink) {
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$('#selflink > a').attr('href', data._selflink);
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}
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if (data._scripts) {
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AJAX.scriptHandler.load(data._scripts);
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}
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if (data._selflink && data._scripts && data._menuHash && data._params) {
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AJAX.cache.add(
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data._selflink,
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data._scripts,
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data._menuHash,
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data._params,
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AJAX.source.attr('rel')
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);
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}
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if (data._params) {
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PMA_commonParams.setAll(data._params);
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}
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if (data._displayMessage) {
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$('#page_content').prepend(data._displayMessage);
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}
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$('#pma_errors').remove();
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if (data._errors) {
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$('<div/>', {id:'pma_errors'})
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.insertAfter('#selflink')
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.append(data._errors);
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}
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if (typeof AJAX._callback === 'function') {
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AJAX._callback.call();
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}
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AJAX._callback = function () {};
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});
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} else {
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PMA_ajaxShowMessage(data.error, false);
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AJAX.active = false;
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}
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},
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/**
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* This object is in charge of downloading scripts,
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* keeping track of what's downloaded and firing
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* the onload event for them when the page is ready.
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*/
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scriptHandler: {
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/**
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* @var array _scripts The list of files already downloaded
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*/
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_scripts: [],
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/**
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* @var array _scriptsToBeLoaded The list of files that
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* need to be downloaded
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*/
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_scriptsToBeLoaded: [],
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/**
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* @var array _scriptsToBeFired The list of files for which
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* to fire the onload event
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*/
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_scriptsToBeFired: [],
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/**
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* Records that a file has been downloaded
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*
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* @param string file The filename
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* @param string fire Whether this file will be registering
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* onload/teardown events
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*
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* @return self For chaining
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*/
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add: function (file, fire) {
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this._scripts.push(file);
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if (fire) {
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// Record whether to fire any events for the file
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// This is necessary to correctly tear down the initial page
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this._scriptsToBeFired.push(file);
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}
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return this;
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},
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/**
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* Download a list of js files in one request
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*
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* @param array files An array of filenames and flags
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*
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* @return void
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*/
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load: function (files) {
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var self = this;
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self._scriptsToBeLoaded = [];
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self._scriptsToBeFired = [];
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for (var i in files) {
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self._scriptsToBeLoaded.push(files[i].name);
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if (files[i].fire) {
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self._scriptsToBeFired.push(files[i].name);
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}
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}
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// Generate a request string
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var request = [];
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var needRequest = false;
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for (var index in self._scriptsToBeLoaded) {
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var script = self._scriptsToBeLoaded[index];
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// Only for scripts that we don't already have
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if ($.inArray(script, self._scripts) == -1) {
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needRequest = true;
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this.add(script);
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request.push("scripts[]=" + script);
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}
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}
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// Download the composite js file, if necessary
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if (needRequest) {
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$.ajax({
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url: "js/get_scripts.js.php?" + request.join("&"),
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cache: true,
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success: function () {
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self.done();
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},
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dataType: "script"
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});
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} else {
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self.done();
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}
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},
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/**
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* Called whenever all files are loaded
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*
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* @return void
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*/
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done: function () {
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for (var i in this._scriptsToBeFired) {
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AJAX.fireOnload(this._scriptsToBeFired[i]);
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}
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AJAX.active = false;
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},
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/**
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* Fires all the teardown event handlers for the current page
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* and rebinds all forms and links to the request handler
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*
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* @param function callback The callback to call after resetting
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*
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* @return void
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*/
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reset: function (callback) {
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for (var i in this._scriptsToBeFired) {
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AJAX.fireTeardown(this._scriptsToBeFired[i]);
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}
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this._scriptsToBeFired = [];
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/**
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* Re-attach a generic event handler to clicks
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* on pages and submissions of forms
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*/
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$('a').die('click').live('click', AJAX.requestHandler);
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$('form').die('submit').live('submit', AJAX.requestHandler);
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AJAX.cache.update();
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callback();
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}
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}
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};
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/**
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* Here we register a function that will remove the onsubmit event from all
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* forms that will be handled by the generic page loader. We then save this
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* event handler in the "jQuery data", so that we can fire it up later in
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* AJAX.requestHandler().
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*
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* See bug #3583316
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*/
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AJAX.registerOnload('functions.js', function () {
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// Registering the onload event for functions.js
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// ensures that it will be fired for all pages
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$('form').not('.ajax').not('.disableAjax').each(function () {
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if ($(this).attr('onsubmit')) {
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$(this).data('onsubmit', this.onsubmit).attr('onsubmit', '');
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}
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});
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});
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/**
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* An implementation of a client-side page cache.
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* This object also uses the cache to provide a simple microhistory,
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* that is the ability to use the back and forward buttons in the browser
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*/
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AJAX.cache = {
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/**
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* @var int The maximum number of pages to keep in the cache
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*/
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MAX: 6,
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/**
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* @var object A hash used to prime the cache with data about the initially
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* loaded page. This is set in the footer, and then loaded
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* by a double-queued event further down this file.
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*/
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primer: {},
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/**
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* @var array Stores the content of the cached pages
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*/
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pages: [],
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/**
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* @var int The index of the currently loaded page
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* This is used to know at which point in the history we are
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*/
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current: 0,
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/**
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* Saves a new page in the cache
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*
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* @param string hash The hash part of the url that is being loaded
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* @param array scripts A list of scripts that is requured for the page
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* @param string menu A hash that links to a menu stored
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* in a dedicated menu cache
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* @param array params A list of parameters used by PMA_commonParams()
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* @param string rel A relationship to the current page:
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* 'samepage': Forces the response to be treated as
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* the same page as the current one
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* 'newpage': Forces the response to be treated as
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* a new page
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* undefined: Default behaviour, 'samepage' if the
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* selflinks of the two pages are the same.
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* 'newpage' otherwise
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*
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* @return void
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*/
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add: function (hash, scripts, menu, params, rel) {
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if (this.pages.length > AJAX.cache.MAX) {
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// Trim the cache, to the maximum number of allowed entries
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// This way we will have a cached menu for every page
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for (var i=0; i<this.pages.length-this.MAX; i++) {
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delete this.pages[i];
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}
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}
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while (this.current < this.pages.length) {
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// trim the cache if we went back in the history
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// and are now going forward again
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this.pages.pop();
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}
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if (rel === 'newpage' ||
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(
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typeof rel === 'undefined' && (
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typeof this.pages[this.current - 1] === 'undefined'
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||
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this.pages[this.current - 1].hash !== hash
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)
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)
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) {
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this.pages.push({
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hash: hash,
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content: $('#page_content').html(),
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scripts: scripts,
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selflink: $('#selflink').html(),
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menu: menu,
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params: params
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});
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AJAX.setUrlHash(this.current, hash);
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this.current++;
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}
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},
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/**
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* Restores a page from the cache. This is called when the hash
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* part of the url changes and it's structure appears to be valid
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*
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* @param string index Which page from the history to load
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*
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* @return void
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*/
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navigate: function (index) {
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if (typeof this.pages[index] === 'undefined') {
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PMA_ajaxShowMessage(
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'<div class="error">' + PMA_messages['strInvalidPage'] + '</div>',
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false
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);
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} else {
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AJAX.active = true;
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var record = this.pages[index];
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AJAX.scriptHandler.reset(function () {
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$('#page_content').html(record.content);
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$('#selflink').html(record.selflink);
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AJAX.cache.menus.replace(AJAX.cache.menus.get(record.menu));
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PMA_commonParams.setAll(record.params);
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AJAX.scriptHandler.load(record.scripts);
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AJAX.cache.current = ++index;
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});
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}
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},
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/**
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* Resaves the content of the current page in the cache.
|
|
* Necessary in order not to show the user some outdated version of the page
|
|
*
|
|
* @return void
|
|
*/
|
|
update: function () {
|
|
var page = this.pages[this.current - 1];
|
|
if (page) {
|
|
page.content = $('#page_content').html();
|
|
}
|
|
},
|
|
/**
|
|
* @var object Dedicated menu cache
|
|
*/
|
|
menus: {
|
|
/**
|
|
* Returns the number of items in an associative array
|
|
*
|
|
* @return int
|
|
*/
|
|
size: function(obj) {
|
|
var size = 0, key;
|
|
for (key in obj) {
|
|
if (obj.hasOwnProperty(key)) {
|
|
size++;
|
|
}
|
|
}
|
|
return size;
|
|
},
|
|
/**
|
|
* @var hash Stores the content of the cached menus
|
|
*/
|
|
data: {},
|
|
/**
|
|
* Saves a new menu in the cache
|
|
*
|
|
* @param string hash The hash (trimmed md5) of the menu to be saved
|
|
* @param string content The HTML code of the menu to be saved
|
|
*
|
|
* @return void
|
|
*/
|
|
add: function (hash, content) {
|
|
if (this.size(this.data) > AJAX.cache.MAX) {
|
|
// when the cache grows, we remove the oldest entry
|
|
var oldest, key, init = 0;
|
|
for (var i in this.data) {
|
|
if (this.data[i]) {
|
|
if (! init || this.data[i].timestamp.getTime() < oldest.getTime()) {
|
|
oldest = this.data[i].timestamp;
|
|
key = i;
|
|
init = 1;
|
|
}
|
|
}
|
|
}
|
|
delete this.data[key];
|
|
}
|
|
this.data[hash] = {
|
|
content: content,
|
|
timestamp: new Date()
|
|
};
|
|
},
|
|
/**
|
|
* Retrieves a menu given its hash
|
|
*
|
|
* @param string hash The hash of the menu to be retrieved
|
|
*
|
|
* @return string
|
|
*/
|
|
get: function (hash) {
|
|
if (this.data[hash]) {
|
|
return this.data[hash].content;
|
|
} else {
|
|
// This should never happen as long as the number of stored menus
|
|
// is larger or equal to the number of pages in the page cache
|
|
return '';
|
|
}
|
|
},
|
|
/**
|
|
* Prepares part of the parameter string used during page requests,
|
|
* this is necessary to tell the server which menus we have in the cache
|
|
*
|
|
* @return string
|
|
*/
|
|
getRequestParam: function () {
|
|
var param = '';
|
|
var menuHashes = [];
|
|
for (var i in this.data) {
|
|
menuHashes.push(i);
|
|
}
|
|
var menuHashesParam = menuHashes.join('-');
|
|
if (menuHashesParam) {
|
|
param = '&menuHashes=' + menuHashesParam;
|
|
}
|
|
return param;
|
|
},
|
|
/**
|
|
* Replaces the menu with new content
|
|
*
|
|
* @return void
|
|
*/
|
|
replace: function (content) {
|
|
$('#floating_menubar').html(content)
|
|
// Remove duplicate wrapper
|
|
// TODO: don't send it in the response
|
|
.children().first().remove();
|
|
$('#topmenu').menuResizer(PMA_mainMenuResizerCallback);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* URL hash management module.
|
|
* Allows direct bookmarking and microhistory.
|
|
*/
|
|
AJAX.setUrlHash = (function (jQuery, window) {
|
|
"use strict";
|
|
/**
|
|
* Indictaes whether we have already completed
|
|
* the initialisation of the hash
|
|
*
|
|
* @access private
|
|
*/
|
|
var ready = false;
|
|
/**
|
|
* Stores a hash that needed to be set when we were not ready
|
|
*
|
|
* @access private
|
|
*/
|
|
var savedHash = "";
|
|
/**
|
|
* Flag to indicate if the change of hash was triggered
|
|
* by a user pressing the back/forward button or if
|
|
* the change was triggered internally
|
|
*
|
|
* @access private
|
|
*/
|
|
var userChange = true;
|
|
|
|
// Fix favicon disappearing in Firefox when setting location.hash
|
|
function resetFavicon() {
|
|
if (jQuery.browser.mozilla) {
|
|
// Move the link tags for the favicon to the bottom
|
|
// of the head element to force a reload of the favicon
|
|
$('head > link[href=favicon\\.ico]').appendTo('head');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the hash part of the URL
|
|
*
|
|
* @access public
|
|
*/
|
|
function setUrlHash(index, hash) {
|
|
/*
|
|
* Known problem:
|
|
* Setting hash leads to reload in webkit:
|
|
* http://www.quirksmode.org/bugreports/archives/2005/05/Safari_13_visual_anomaly_with_windowlocationhref.html
|
|
*
|
|
* so we expect that users are not running an ancient Safari version
|
|
*/
|
|
|
|
userChange = false;
|
|
if (ready) {
|
|
window.location.hash = "PMAURL-" + index + ":" + hash;
|
|
resetFavicon();
|
|
} else {
|
|
savedHash = "PMAURL-" + index + ":" + hash;
|
|
}
|
|
}
|
|
/**
|
|
* Start initialisation
|
|
*/
|
|
var urlhash = window.location.hash;
|
|
if (urlhash.substring(0, 8) == '#PMAURL-') {
|
|
// We have a valid hash, let's redirect the user
|
|
// to the page that it's pointing to
|
|
var colon_position = urlhash.indexOf(':');
|
|
var questionmark_position = urlhash.indexOf('?');
|
|
if (colon_position != -1 && questionmark_position != -1 && colon_position < questionmark_position) {
|
|
var hash_url = urlhash.substring(colon_position + 1, questionmark_position);
|
|
if (PMA_gotoWhitelist.indexOf(hash_url) != -1) {
|
|
window.location = urlhash.substring(
|
|
colon_position + 1
|
|
);
|
|
}
|
|
}
|
|
} else {
|
|
// We don't have a valid hash, so we'll set it up
|
|
// when the page finishes loading
|
|
jQuery(function(){
|
|
/* Check if we should set URL */
|
|
if (savedHash != "") {
|
|
window.location.hash = savedHash;
|
|
savedHash = "";
|
|
resetFavicon();
|
|
}
|
|
// Indicate that we're done initialising
|
|
ready = true;
|
|
});
|
|
}
|
|
/**
|
|
* Register an event handler for when the url hash changes
|
|
*/
|
|
jQuery(function(){
|
|
jQuery(window).hashchange(function () {
|
|
if (userChange === false) {
|
|
// Ignore internally triggered hash changes
|
|
userChange = true;
|
|
} else if (/^#PMAURL-\d+:/.test(window.location.hash)) {
|
|
// Change page if the hash changed was triggered by a user action
|
|
var index = window.location.hash.substring(
|
|
8, window.location.hash.indexOf(':')
|
|
);
|
|
AJAX.cache.navigate(index);
|
|
}
|
|
});
|
|
});
|
|
/**
|
|
* Publicly exposes a reference to the otherwise private setUrlHash function
|
|
*/
|
|
return setUrlHash;
|
|
})(jQuery, window);
|
|
|
|
/**
|
|
* Page load event handler
|
|
*/
|
|
$(function () {
|
|
// Add the menu from the initial page into the cache
|
|
// The cache primer is set by the footer class
|
|
if (AJAX.cache.primer.url) {
|
|
AJAX.cache.menus.add(
|
|
AJAX.cache.primer.menuHash,
|
|
$('<div></div>')
|
|
.append('<div></div>')
|
|
.append($('#serverinfo').clone())
|
|
.append($('#topmenucontainer').clone())
|
|
.html()
|
|
);
|
|
}
|
|
$(function () {
|
|
// Queue up this event twice to make sure that we get a copy
|
|
// of the page after all other onload events have been fired
|
|
if (AJAX.cache.primer.url) {
|
|
AJAX.cache.add(
|
|
AJAX.cache.primer.url,
|
|
AJAX.cache.primer.scripts,
|
|
AJAX.cache.primer.menuHash
|
|
);
|
|
}
|
|
});
|
|
});
|
|
|
|
/**
|
|
* Attach a generic event handler to clicks
|
|
* on pages and submissions of forms
|
|
*/
|
|
$('a').live('click', AJAX.requestHandler);
|
|
$('form').live('submit', AJAX.requestHandler);
|
|
|
|
/**
|
|
* Gracefully handle fatal server errors
|
|
* (e.g: 500 - Internal server error)
|
|
*/
|
|
$(document).ajaxError(function(event, request, settings){
|
|
if (request.status !== 0) { // Don't handle aborted requests
|
|
var errorCode = $.sprintf(PMA_messages['strErrorCode'], request.status);
|
|
var errorText = $.sprintf(PMA_messages['strErrorText'], request.statusText);
|
|
PMA_ajaxShowMessage(
|
|
'<div class="error">'
|
|
+ PMA_messages['strErrorProcessingRequest']
|
|
+ '<div>' + escapeHtml(errorCode) + '</div>'
|
|
+ '<div>' + escapeHtml(errorText) + '</div>'
|
|
+ '</div>',
|
|
false
|
|
);
|
|
AJAX.active = false;
|
|
}
|
|
});
|