webmaster@3: // $Id: drupal.js,v 1.41.2.2 2008/02/27 19:44:44 goba Exp $
webmaster@1: 
webmaster@1: var Drupal = Drupal || { 'settings': {}, 'behaviors': {}, 'themes': {}, 'locale': {} };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Set the variable that indicates if JavaScript behaviors should be applied
webmaster@1:  */
webmaster@1: Drupal.jsEnabled = document.getElementsByTagName && document.createElement && document.createTextNode && document.documentElement && document.getElementById;
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Attach all registered behaviors to a page element.
webmaster@1:  *
webmaster@1:  * Behaviors are event-triggered actions that attach to page elements, enhancing
webmaster@1:  * default non-Javascript UIs. Behaviors are registered in the Drupal.behaviors
webmaster@1:  * object as follows:
webmaster@1:  * @code
webmaster@1:  *    Drupal.behaviors.behaviorName = function () {
webmaster@1:  *      ...
webmaster@1:  *    };
webmaster@1:  * @endcode
webmaster@1:  *
webmaster@1:  * Drupal.attachBehaviors is added below to the jQuery ready event and so
webmaster@1:  * runs on initial page load. Developers implementing AHAH/AJAX in their
webmaster@1:  * solutions should also call this function after new page content has been
webmaster@1:  * loaded, feeding in an element to be processed, in order to attach all
webmaster@1:  * behaviors to the new content.
webmaster@1:  *
webmaster@1:  * Behaviors should use a class in the form behaviorName-processed to ensure
webmaster@1:  * the behavior is attached only once to a given element. (Doing so enables
webmaster@1:  * the reprocessing of given elements, which may be needed on occasion despite
webmaster@1:  * the ability to limit behavior attachment to a particular element.)
webmaster@1:  *
webmaster@1:  * @param context
webmaster@1:  *   An element to attach behaviors to. If none is given, the document element
webmaster@1:  *   is used.
webmaster@1:  */
webmaster@1: Drupal.attachBehaviors = function(context) {
webmaster@1:   context = context || document;
webmaster@1:   if (Drupal.jsEnabled) {
webmaster@1:     // Execute all of them.
webmaster@1:     jQuery.each(Drupal.behaviors, function() {
webmaster@1:       this(context);
webmaster@1:     });
webmaster@1:   }
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Encode special characters in a plain-text string for display as HTML.
webmaster@1:  */
webmaster@1: Drupal.checkPlain = function(str) {
webmaster@1:   str = String(str);
webmaster@1:   var replace = { '&': '&amp;', '"': '&quot;', '<': '&lt;', '>': '&gt;' };
webmaster@1:   for (var character in replace) {
webmaster@3:     var regex = new RegExp(character, 'g');
webmaster@3:     str = str.replace(regex, replace[character]);
webmaster@1:   }
webmaster@1:   return str;
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Translate strings to the page language or a given language.
webmaster@1:  *
webmaster@1:  * See the documentation of the server-side t() function for further details.
webmaster@1:  *
webmaster@1:  * @param str
webmaster@1:  *   A string containing the English string to translate.
webmaster@1:  * @param args
webmaster@1:  *   An object of replacements pairs to make after translation. Incidences
webmaster@1:  *   of any key in this array are replaced with the corresponding value.
webmaster@1:  *   Based on the first character of the key, the value is escaped and/or themed:
webmaster@1:  *    - !variable: inserted as is
webmaster@1:  *    - @variable: escape plain text to HTML (Drupal.checkPlain)
webmaster@1:  *    - %variable: escape text and theme as a placeholder for user-submitted
webmaster@1:  *      content (checkPlain + Drupal.theme('placeholder'))
webmaster@1:  * @return
webmaster@1:  *   The translated string.
webmaster@1:  */
webmaster@1: Drupal.t = function(str, args) {
webmaster@1:   // Fetch the localized version of the string.
webmaster@1:   if (Drupal.locale.strings && Drupal.locale.strings[str]) {
webmaster@1:     str = Drupal.locale.strings[str];
webmaster@1:   }
webmaster@1: 
webmaster@1:   if (args) {
webmaster@1:     // Transform arguments before inserting them
webmaster@1:     for (var key in args) {
webmaster@1:       switch (key.charAt(0)) {
webmaster@1:         // Escaped only
webmaster@1:         case '@':
webmaster@1:           args[key] = Drupal.checkPlain(args[key]);
webmaster@1:         break;
webmaster@1:         // Pass-through
webmaster@1:         case '!':
webmaster@1:           break;
webmaster@1:         // Escaped and placeholder
webmaster@1:         case '%':
webmaster@1:         default:
webmaster@1:           args[key] = Drupal.theme('placeholder', args[key]);
webmaster@1:           break;
webmaster@1:       }
webmaster@1:       str = str.replace(key, args[key]);
webmaster@1:     }
webmaster@1:   }
webmaster@1:   return str;
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Format a string containing a count of items.
webmaster@1:  *
webmaster@1:  * This function ensures that the string is pluralized correctly. Since Drupal.t() is
webmaster@1:  * called by this function, make sure not to pass already-localized strings to it.
webmaster@1:  *
webmaster@1:  * See the documentation of the server-side format_plural() function for further details.
webmaster@1:  *
webmaster@1:  * @param count
webmaster@1:  *   The item count to display.
webmaster@1:  * @param singular
webmaster@1:  *   The string for the singular case. Please make sure it is clear this is
webmaster@1:  *   singular, to ease translation (e.g. use "1 new comment" instead of "1 new").
webmaster@1:  *   Do not use @count in the singular string.
webmaster@1:  * @param plural
webmaster@1:  *   The string for the plural case. Please make sure it is clear this is plural,
webmaster@1:  *   to ease translation. Use @count in place of the item count, as in "@count
webmaster@1:  *   new comments".
webmaster@1:  * @param args
webmaster@1:  *   An object of replacements pairs to make after translation. Incidences
webmaster@1:  *   of any key in this array are replaced with the corresponding value.
webmaster@1:  *   Based on the first character of the key, the value is escaped and/or themed:
webmaster@1:  *    - !variable: inserted as is
webmaster@1:  *    - @variable: escape plain text to HTML (Drupal.checkPlain)
webmaster@1:  *    - %variable: escape text and theme as a placeholder for user-submitted
webmaster@1:  *      content (checkPlain + Drupal.theme('placeholder'))
webmaster@1:  *   Note that you do not need to include @count in this array.
webmaster@1:  *   This replacement is done automatically for the plural case.
webmaster@1:  * @return
webmaster@1:  *   A translated string.
webmaster@1:  */
webmaster@1: Drupal.formatPlural = function(count, singular, plural, args) {
webmaster@1:   var args = args || {};
webmaster@1:   args['@count'] = count;
webmaster@1:   // Determine the index of the plural form.
webmaster@1:   var index = Drupal.locale.pluralFormula ? Drupal.locale.pluralFormula(args['@count']) : ((args['@count'] == 1) ? 0 : 1);
webmaster@1: 
webmaster@1:   if (index == 0) {
webmaster@1:     return Drupal.t(singular, args);
webmaster@1:   }
webmaster@1:   else if (index == 1) {
webmaster@1:     return Drupal.t(plural, args);
webmaster@1:   }
webmaster@1:   else {
webmaster@1:     args['@count['+ index +']'] = args['@count'];
webmaster@1:     delete args['@count'];
webmaster@1:     return Drupal.t(plural.replace('@count', '@count['+ index +']'));
webmaster@1:   }
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Generate the themed representation of a Drupal object.
webmaster@1:  *
webmaster@1:  * All requests for themed output must go through this function. It examines
webmaster@1:  * the request and routes it to the appropriate theme function. If the current
webmaster@1:  * theme does not provide an override function, the generic theme function is
webmaster@1:  * called.
webmaster@1:  *
webmaster@1:  * For example, to retrieve the HTML that is output by theme_placeholder(text),
webmaster@1:  * call Drupal.theme('placeholder', text).
webmaster@1:  *
webmaster@1:  * @param func
webmaster@1:  *   The name of the theme function to call.
webmaster@1:  * @param ...
webmaster@1:  *   Additional arguments to pass along to the theme function.
webmaster@1:  * @return
webmaster@1:  *   Any data the theme function returns. This could be a plain HTML string,
webmaster@1:  *   but also a complex object.
webmaster@1:  */
webmaster@1: Drupal.theme = function(func) {
webmaster@1:   for (var i = 1, args = []; i < arguments.length; i++) {
webmaster@1:     args.push(arguments[i]);
webmaster@1:   }
webmaster@1: 
webmaster@1:   return (Drupal.theme[func] || Drupal.theme.prototype[func]).apply(this, args);
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Parse a JSON response.
webmaster@1:  *
webmaster@1:  * The result is either the JSON object, or an object with 'status' 0 and 'data' an error message.
webmaster@1:  */
webmaster@1: Drupal.parseJson = function (data) {
webmaster@1:   if ((data.substring(0, 1) != '{') && (data.substring(0, 1) != '[')) {
webmaster@1:     return { status: 0, data: data.length ? data : Drupal.t('Unspecified error') };
webmaster@1:   }
webmaster@1:   return eval('(' + data + ');');
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Freeze the current body height (as minimum height). Used to prevent
webmaster@1:  * unnecessary upwards scrolling when doing DOM manipulations.
webmaster@1:  */
webmaster@1: Drupal.freezeHeight = function () {
webmaster@1:   Drupal.unfreezeHeight();
webmaster@1:   var div = document.createElement('div');
webmaster@1:   $(div).css({
webmaster@1:     position: 'absolute',
webmaster@1:     top: '0px',
webmaster@1:     left: '0px',
webmaster@1:     width: '1px',
webmaster@1:     height: $('body').css('height')
webmaster@1:   }).attr('id', 'freeze-height');
webmaster@1:   $('body').append(div);
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Unfreeze the body height
webmaster@1:  */
webmaster@1: Drupal.unfreezeHeight = function () {
webmaster@1:   $('#freeze-height').remove();
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Wrapper to address the mod_rewrite url encoding bug
webmaster@1:  * (equivalent of drupal_urlencode() in PHP).
webmaster@1:  */
webmaster@1: Drupal.encodeURIComponent = function (item, uri) {
webmaster@1:   uri = uri || location.href;
webmaster@1:   item = encodeURIComponent(item).replace(/%2F/g, '/');
webmaster@1:   return (uri.indexOf('?q=') != -1) ? item : item.replace(/%26/g, '%2526').replace(/%23/g, '%2523').replace(/\/\//g, '/%252F');
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Get the text selection in a textarea.
webmaster@1:  */
webmaster@1: Drupal.getSelection = function (element) {
webmaster@1:   if (typeof(element.selectionStart) != 'number' && document.selection) {
webmaster@1:     // The current selection
webmaster@1:     var range1 = document.selection.createRange();
webmaster@1:     var range2 = range1.duplicate();
webmaster@1:     // Select all text.
webmaster@1:     range2.moveToElementText(element);
webmaster@1:     // Now move 'dummy' end point to end point of original range.
webmaster@1:     range2.setEndPoint('EndToEnd', range1);
webmaster@1:     // Now we can calculate start and end points.
webmaster@1:     var start = range2.text.length - range1.text.length;
webmaster@1:     var end = start + range1.text.length;
webmaster@1:     return { 'start': start, 'end': end };
webmaster@1:   }
webmaster@1:   return { 'start': element.selectionStart, 'end': element.selectionEnd };
webmaster@1: };
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Build an error message from ahah response.
webmaster@1:  */
webmaster@1: Drupal.ahahError = function(xmlhttp, uri) {
webmaster@1:   if (xmlhttp.status == 200) {
webmaster@1:     if (jQuery.trim($(xmlhttp.responseText).text())) {
webmaster@1:       var message = Drupal.t("An error occurred. \n@uri\n@text", {'@uri': uri, '@text': xmlhttp.responseText });
webmaster@1:     }
webmaster@1:     else {
webmaster@1:       var message = Drupal.t("An error occurred. \n@uri\n(no information available).", {'@uri': uri, '@text': xmlhttp.responseText });
webmaster@1:     }
webmaster@1:   }
webmaster@1:   else {
webmaster@1:     var message = Drupal.t("An HTTP error @status occurred. \n@uri", {'@uri': uri, '@status': xmlhttp.status });
webmaster@1:   }
webmaster@1:   return message;
webmaster@1: }
webmaster@1: 
webmaster@1: // Global Killswitch on the <html> element
webmaster@1: if (Drupal.jsEnabled) {
webmaster@1:   // Global Killswitch on the <html> element
webmaster@1:   document.documentElement.className = 'js';
webmaster@1:   // 'js enabled' cookie
webmaster@1:   document.cookie = 'has_js=1; path=/';
webmaster@1:   // Attach all behaviors.
webmaster@1:   $(document).ready(function() {
webmaster@1:     Drupal.attachBehaviors(this);
webmaster@1:   });
webmaster@1: }
webmaster@1: 
webmaster@1: /**
webmaster@1:  * The default themes.
webmaster@1:  */
webmaster@1: Drupal.theme.prototype = {
webmaster@1: 
webmaster@1:   /**
webmaster@1:    * Formats text for emphasized display in a placeholder inside a sentence.
webmaster@1:    *
webmaster@1:    * @param str
webmaster@1:    *   The text to format (plain-text).
webmaster@1:    * @return
webmaster@1:    *   The formatted text (html).
webmaster@1:    */
webmaster@1:   placeholder: function(str) {
webmaster@1:     return '<em>' + Drupal.checkPlain(str) + '</em>';
webmaster@1:   }
webmaster@1: };