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   1  // $Id: teaser.js,v 1.12.2.2 2010/03/01 10:13:18 goba Exp $
   2  
   3  /**
   4   * Auto-attach for teaser behavior.
   5   *
   6   * Note: depends on resizable textareas.
   7   */
   8  Drupal.behaviors.teaser = function(context) {
   9    // This breaks in Konqueror. Prevent it from running.
  10    if (/KDE/.test(navigator.vendor)) {
  11      return;
  12    }
  13  
  14    $('textarea.teaser:not(.teaser-processed)', context).each(function() {
  15      var teaser = $(this).addClass('teaser-processed');
  16  
  17      // Move teaser textarea before body, and remove its form-item wrapper.
  18      var body = $('#'+ Drupal.settings.teaser[this.id]);
  19      var checkbox = $('#'+ Drupal.settings.teaserCheckbox[this.id]).parent();
  20      var checked = $(checkbox).children('input').attr('checked') ? true : false;
  21      var parent = teaser[0].parentNode;
  22      $(body).before(teaser);
  23      $(parent).remove();
  24  
  25      function trim(text) {
  26        return text.replace(/^\s+/g, '').replace(/\s+$/g, '');
  27      }
  28  
  29      // Join the teaser back to the body.
  30      function join_teaser() {
  31        if (teaser.val()) {
  32          body.val(trim(teaser.val()) +'\r\n\r\n'+ trim(body.val()));
  33        }
  34        // Empty, hide and disable teaser.
  35        teaser[0].value = '';
  36        $(teaser).attr('disabled', 'disabled');
  37        $(teaser).parent().slideUp('fast');
  38        // Change label.
  39        $(this).val(Drupal.t('Split summary at cursor'));
  40        // Hide separate teaser checkbox.
  41        $(checkbox).hide();
  42        // Force a hidden checkbox to be checked (to ensure that the body is
  43        // correctly processed on form submit when teaser/body are in joined
  44        // state), and remember the current checked status.
  45        checked = $(checkbox).children('input').attr('checked') ? true : false;
  46        $(checkbox).children('input').attr('checked', true);
  47      }
  48  
  49      // Split the teaser from the body.
  50      function split_teaser() {
  51        body[0].focus();
  52        var selection = Drupal.getSelection(body[0]);
  53        var split = selection.start;
  54        var text = body.val();
  55  
  56        // Note: using val() fails sometimes. jQuery bug?
  57        teaser[0].value = trim(text.slice(0, split));
  58        body[0].value = trim(text.slice(split));
  59        // Reveal and enable teaser
  60        $(teaser).attr('disabled', '');
  61        $(teaser).parent().slideDown('fast');
  62        // Change label
  63        $(this).val(Drupal.t('Join summary'));
  64        // Show separate teaser checkbox, restore checked value.
  65        $(checkbox).show().children('input').attr('checked', checked);
  66      }
  67  
  68      // Add split/join button.
  69      var button = $('<div class="teaser-button-wrapper"><input type="button" class="teaser-button" /></div>');
  70      var include = $('#'+ this.id.substring(0, this.id.length - 2) +'include');
  71      $(include).parent().parent().before(button);
  72  
  73      // Extract the teaser from the body, if set. Otherwise, stay in joined mode.
  74      var text = body.val().split('<!--break-->');
  75      if (text.length >= 2) {
  76        teaser[0].value = trim(text.shift());
  77        body[0].value = trim(text.join('<!--break-->'));
  78        $(teaser).attr('disabled', '');
  79        $('input', button).val(Drupal.t('Join summary')).toggle(join_teaser, split_teaser);
  80      }
  81      else {
  82        $('input', button).val(Drupal.t('Split summary at cursor')).toggle(split_teaser, join_teaser);
  83        $(checkbox).hide().children('input').attr('checked', true);
  84      }
  85  
  86      // Make sure that textarea.js has done its magic to ensure proper visibility state.
  87      if (Drupal.behaviors.textarea && teaser.is(('.form-textarea:not(.textarea-processed)'))) {
  88        Drupal.behaviors.textarea(teaser.parentNode);
  89      }
  90      // Set initial visibility
  91      if ($(teaser).is(':disabled')) {
  92        $(teaser).parent().hide();
  93      }
  94  
  95    });
  96  };