// $Id: teaser.js,v 1.12.2.1 2009/05/20 11:50:54 goba Exp $

/**

 * Auto-attach for teaser behavior.

 *

 * Note: depends on resizable textareas.

 */

Drupal.behaviors.teaser = function(context) {

  // This breaks in Konqueror. Prevent it from running.

  if (/KDE/.test(navigator.vendor)) {

    return;

  }

  $('textarea.teaser:not(.teaser-processed)', context).each(function() {

    var teaser = $(this).addClass('teaser-processed');

    // Move teaser textarea before body, and remove its form-item wrapper.

    var body = $('#'+ Drupal.settings.teaser[this.id]);

    var checkbox = $('#'+ Drupal.settings.teaserCheckbox[this.id]).parent();

    var checked = $(checkbox).children('input').attr('checked') ? true : false;

    var parent = teaser[0].parentNode;

    $(body).before(teaser);

    $(parent).remove();

    function trim(text) {

      return text.replace(/^\s+/g, '').replace(/\s+$/g, '');

    }

    // Join the teaser back to the body.

    function join_teaser() {

      if (teaser.val()) {

        body.val(trim(teaser.val()) +'\r\n\r\n'+ trim(body.val()));

      }

      // Empty, hide and disable teaser.

      teaser[0].value = '';

      $(teaser).attr('disabled', 'disabled');

      $(teaser).parent().slideUp('fast');

      // Change label.

      $(this).val(Drupal.t('Split summary at cursor'));

      // Hide separate teaser checkbox.

      $(checkbox).hide();

      // Force a hidden checkbox to be checked (to ensure that the body is

      // correctly processed on form submit when teaser/body are in joined

      // state), and remember the current checked status.

      checked = $(checkbox).children('input').attr('checked') ? true : false;

      $(checkbox).children('input').attr('checked', true);

    }

    // Split the teaser from the body.

    function split_teaser() {

      body[0].focus();

      var selection = Drupal.getSelection(body[0]);

      var split = selection.start;

      var text = body.val();

      // Note: using val() fails sometimes. jQuery bug?

      teaser[0].value = trim(text.slice(0, split));

      body[0].value = trim(text.slice(split));

      // Reveal and enable teaser

      $(teaser).attr('disabled', '');

      $(teaser).parent().slideDown('fast');

      // Change label

      $(this).val(Drupal.t('Join summary'));

      // Show separate teaser checkbox, restore checked value.

      $(checkbox).show().children('input').attr('checked', checked);

    }

    // Add split/join button.

    var button = $('<div class="teaser-button-wrapper"><input type="button" class="teaser-button" /></div>');

    var include = $('#'+ this.id.substring(0, this.id.length - 2) +'include');

    $(include).parent().parent().before(button);

    // Extract the teaser from the body, if set. Otherwise, stay in joined mode.

    var text = body.val().split('<!--break-->');

    if (text.length >= 2) {

      teaser[0].value = trim(text.shift());

      body[0].value = trim(text.join('<!--break-->'));

      $(teaser).attr('disabled', '');

      $('input', button).val(Drupal.t('Join summary')).toggle(join_teaser, split_teaser);

    }

    else {

      $('input', button).val(Drupal.t('Split summary at cursor')).toggle(split_teaser, join_teaser);

      $(checkbox).hide().children('input').attr('checked', true);

    }

    // Make sure that textarea.js has done its magic to ensure proper visibility state.

    if (Drupal.behaviors.textarea && teaser.is(('.form-textarea:not(.textarea-processed)'))) {

      Drupal.behaviors.textarea(teaser.parentNode);

    }

    // Set initial visibility

    if ($(teaser).is('[@disabled]')) {

      $(teaser).parent().hide();

    }

  });

};