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   1  // $Id: textarea.js,v 1.22 2008/01/17 19:31:56 goba Exp $
   2  
   3  Drupal.behaviors.textarea = function(context) {
   4    $('textarea.resizable:not(.textarea-processed)', context).each(function() {
   5      // Avoid non-processed teasers.
   6      if ($(this).is(('textarea.teaser:not(.teaser-processed)'))) {
   7        return false;  
   8      }
   9      var textarea = $(this).addClass('textarea-processed'), staticOffset = null;
  10  
  11      // When wrapping the text area, work around an IE margin bug.  See:
  12      // http://jaspan.com/ie-inherited-margin-bug-form-elements-and-haslayout
  13      $(this).wrap('<div class="resizable-textarea"><span></span></div>')
  14        .parent().append($('<div class="grippie"></div>').mousedown(startDrag));
  15  
  16      var grippie = $('div.grippie', $(this).parent())[0];
  17      grippie.style.marginRight = (grippie.offsetWidth - $(this)[0].offsetWidth) +'px';
  18  
  19      function startDrag(e) {
  20        staticOffset = textarea.height() - e.pageY;
  21        textarea.css('opacity', 0.25);
  22        $(document).mousemove(performDrag).mouseup(endDrag);
  23        return false;
  24      }
  25  
  26      function performDrag(e) {
  27        textarea.height(Math.max(32, staticOffset + e.pageY) + 'px');
  28        return false;
  29      }
  30  
  31      function endDrag(e) {
  32        $(document).unbind("mousemove", performDrag).unbind("mouseup", endDrag);
  33        textarea.css('opacity', 1);
  34      }
  35    });
  36  };