// $Id: drupal.js,v 1.41.2.3 2008/06/25 09:06:57 goba Exp $

var Drupal = Drupal || { 'settings': {}, 'behaviors': {}, 'themes': {}, 'locale': {} };

/**

 * Set the variable that indicates if JavaScript behaviors should be applied

 */

Drupal.jsEnabled = document.getElementsByTagName && document.createElement && document.createTextNode && document.documentElement && document.getElementById;

/**

 * Attach all registered behaviors to a page element.

 *

 * Behaviors are event-triggered actions that attach to page elements, enhancing

 * default non-Javascript UIs. Behaviors are registered in the Drupal.behaviors

 * object as follows:

 * @code

 *    Drupal.behaviors.behaviorName = function () {

 *      ...

 *    };

 * @endcode

 *

 * Drupal.attachBehaviors is added below to the jQuery ready event and so

 * runs on initial page load. Developers implementing AHAH/AJAX in their

 * solutions should also call this function after new page content has been

 * loaded, feeding in an element to be processed, in order to attach all

 * behaviors to the new content.

 *

 * Behaviors should use a class in the form behaviorName-processed to ensure

 * the behavior is attached only once to a given element. (Doing so enables

 * the reprocessing of given elements, which may be needed on occasion despite

 * the ability to limit behavior attachment to a particular element.)

 *

 * @param context

 *   An element to attach behaviors to. If none is given, the document element

 *   is used.

 */

Drupal.attachBehaviors = function(context) {

  context = context || document;

  if (Drupal.jsEnabled) {

    // Execute all of them.

    jQuery.each(Drupal.behaviors, function() {

      this(context);

    });

  }

};

/**

 * Encode special characters in a plain-text string for display as HTML.

 */

Drupal.checkPlain = function(str) {

  str = String(str);

  var replace = { '&': '&amp;', '"': '&quot;', '<': '&lt;', '>': '&gt;' };

  for (var character in replace) {

    var regex = new RegExp(character, 'g');

    str = str.replace(regex, replace[character]);

  }

  return str;

};

/**

 * Translate strings to the page language or a given language.

 *

 * See the documentation of the server-side t() function for further details.

 *

 * @param str

 *   A string containing the English string to translate.

 * @param args

 *   An object of replacements pairs to make after translation. Incidences

 *   of any key in this array are replaced with the corresponding value.

 *   Based on the first character of the key, the value is escaped and/or themed:

 *    - !variable: inserted as is

 *    - @variable: escape plain text to HTML (Drupal.checkPlain)

 *    - %variable: escape text and theme as a placeholder for user-submitted

 *      content (checkPlain + Drupal.theme('placeholder'))

 * @return

 *   The translated string.

 */

Drupal.t = function(str, args) {

  // Fetch the localized version of the string.

  if (Drupal.locale.strings && Drupal.locale.strings[str]) {

    str = Drupal.locale.strings[str];

  }

  if (args) {

    // Transform arguments before inserting them

    for (var key in args) {

      switch (key.charAt(0)) {

        // Escaped only

        case '@':

          args[key] = Drupal.checkPlain(args[key]);

        break;

        // Pass-through

        case '!':

          break;

        // Escaped and placeholder

        case '%':

        default:

          args[key] = Drupal.theme('placeholder', args[key]);

          break;

      }

      str = str.replace(key, args[key]);

    }

  }

  return str;

};

/**

 * Format a string containing a count of items.

 *

 * This function ensures that the string is pluralized correctly. Since Drupal.t() is

 * called by this function, make sure not to pass already-localized strings to it.

 *

 * See the documentation of the server-side format_plural() function for further details.

 *

 * @param count

 *   The item count to display.

 * @param singular

 *   The string for the singular case. Please make sure it is clear this is

 *   singular, to ease translation (e.g. use "1 new comment" instead of "1 new").

 *   Do not use @count in the singular string.

 * @param plural

 *   The string for the plural case. Please make sure it is clear this is plural,

 *   to ease translation. Use @count in place of the item count, as in "@count

 *   new comments".

 * @param args

 *   An object of replacements pairs to make after translation. Incidences

 *   of any key in this array are replaced with the corresponding value.

 *   Based on the first character of the key, the value is escaped and/or themed:

 *    - !variable: inserted as is

 *    - @variable: escape plain text to HTML (Drupal.checkPlain)

 *    - %variable: escape text and theme as a placeholder for user-submitted

 *      content (checkPlain + Drupal.theme('placeholder'))

 *   Note that you do not need to include @count in this array.

 *   This replacement is done automatically for the plural case.

 * @return

 *   A translated string.

 */

Drupal.formatPlural = function(count, singular, plural, args) {

  var args = args || {};

  args['@count'] = count;

  // Determine the index of the plural form.

  var index = Drupal.locale.pluralFormula ? Drupal.locale.pluralFormula(args['@count']) : ((args['@count'] == 1) ? 0 : 1);

  if (index == 0) {

    return Drupal.t(singular, args);

  }

  else if (index == 1) {

    return Drupal.t(plural, args);

  }

  else {

    args['@count['+ index +']'] = args['@count'];

    delete args['@count'];

    return Drupal.t(plural.replace('@count', '@count['+ index +']'));

  }

};

/**

 * Generate the themed representation of a Drupal object.

 *

 * All requests for themed output must go through this function. It examines

 * the request and routes it to the appropriate theme function. If the current

 * theme does not provide an override function, the generic theme function is

 * called.

 *

 * For example, to retrieve the HTML that is output by theme_placeholder(text),

 * call Drupal.theme('placeholder', text).

 *

 * @param func

 *   The name of the theme function to call.

 * @param ...

 *   Additional arguments to pass along to the theme function.

 * @return

 *   Any data the theme function returns. This could be a plain HTML string,

 *   but also a complex object.

 */

Drupal.theme = function(func) {

  for (var i = 1, args = []; i < arguments.length; i++) {

    args.push(arguments[i]);

  }

  return (Drupal.theme[func] || Drupal.theme.prototype[func]).apply(this, args);

};

/**

 * Parse a JSON response.

 *

 * The result is either the JSON object, or an object with 'status' 0 and 'data' an error message.

 */

Drupal.parseJson = function (data) {

  if ((data.substring(0, 1) != '{') && (data.substring(0, 1) != '[')) {

    return { status: 0, data: data.length ? data : Drupal.t('Unspecified error') };

  }

  return eval('(' + data + ');');

};

/**

 * Freeze the current body height (as minimum height). Used to prevent

 * unnecessary upwards scrolling when doing DOM manipulations.

 */

Drupal.freezeHeight = function () {

  Drupal.unfreezeHeight();

  var div = document.createElement('div');

  $(div).css({

    position: 'absolute',

    top: '0px',

    left: '0px',

    width: '1px',

    height: $('body').css('height')

  }).attr('id', 'freeze-height');

  $('body').append(div);

};

/**

 * Unfreeze the body height

 */

Drupal.unfreezeHeight = function () {

  $('#freeze-height').remove();

};

/**

 * Wrapper to address the mod_rewrite url encoding bug

 * (equivalent of drupal_urlencode() in PHP).

 */

Drupal.encodeURIComponent = function (item, uri) {

  uri = uri || location.href;

  item = encodeURIComponent(item).replace(/%2F/g, '/');

  return (uri.indexOf('?q=') != -1) ? item : item.replace(/%26/g, '%2526').replace(/%23/g, '%2523').replace(/\/\//g, '/%252F');

};

/**

 * Get the text selection in a textarea.

 */

Drupal.getSelection = function (element) {

  if (typeof(element.selectionStart) != 'number' && document.selection) {

    // The current selection

    var range1 = document.selection.createRange();

    var range2 = range1.duplicate();

    // Select all text.

    range2.moveToElementText(element);

    // Now move 'dummy' end point to end point of original range.

    range2.setEndPoint('EndToEnd', range1);

    // Now we can calculate start and end points.

    var start = range2.text.length - range1.text.length;

    var end = start + range1.text.length;

    return { 'start': start, 'end': end };

  }

  return { 'start': element.selectionStart, 'end': element.selectionEnd };

};

/**

 * Build an error message from ahah response.

 */

Drupal.ahahError = function(xmlhttp, uri) {

  if (xmlhttp.status == 200) {

    if (jQuery.trim($(xmlhttp.responseText).text())) {

      var message = Drupal.t("An error occurred. \n@uri\n@text", {'@uri': uri, '@text': xmlhttp.responseText });

    }

    else {

      var message = Drupal.t("An error occurred. \n@uri\n(no information available).", {'@uri': uri, '@text': xmlhttp.responseText });

    }

  }

  else {

    var message = Drupal.t("An HTTP error @status occurred. \n@uri", {'@uri': uri, '@status': xmlhttp.status });

  }

  return message;

}

// Global Killswitch on the <html> element

if (Drupal.jsEnabled) {

  // Global Killswitch on the <html> element

  $(document.documentElement).addClass('js');

  // 'js enabled' cookie

  document.cookie = 'has_js=1; path=/';

  // Attach all behaviors.

  $(document).ready(function() {

    Drupal.attachBehaviors(this);

  });

}

/**

 * The default themes.

 */

Drupal.theme.prototype = {

  /**

   * Formats text for emphasized display in a placeholder inside a sentence.

   *

   * @param str

   *   The text to format (plain-text).

   * @return

   *   The formatted text (html).

   */

  placeholder: function(str) {

    return '<em>' + Drupal.checkPlain(str) + '</em>';

  }

};