Text editors

I tested integration immediately and Xinha rendered editor a little slower than htmlarea but in first test version I replaced textareas "for-textarea" with a different way than before (without disabeling htmlarea) in moodle 2.0.

Note - just for testing:

First I uploaded the latest nightly build version of Xinha from http://xinha.webfactional.com/wiki/DownloadsPage

Then I changed in weblib.php:

function print_textarea($usehtmleditor, $rows, $cols, $width, $height, $name, $value='', $courseid=0, $return=false, $id='') {
    global $CFG, $COURSE, $HTTPSPAGEREQUIRED;
 static $scriptcount = 0;
    $str = '';
    if ($id === '') {
        $id = 'edit-'.$name;
    }

if (empty($courseid)) {
            $courseid = $COURSE->id;
        }
if ($usehtmleditor) {
            if (!empty($courseid) and has_capability('moodle/course:managefiles', get_context_instance(CONTEXT_COURSE, $courseid))) {
                $httpsrequired = empty($HTTPSPAGEREQUIRED) ? '' : '&ampt;httpsrequired=1';
                // needed for course file area browsing in image insert plugin
                $str .= ($scriptcount < 1) ? '<script type="text/javascript" src="'.
                        $CFG->httpswwwroot .'/lib/editor/xinha/XinhaCore.js?id='.$courseid.$httpsrequired.'"></script>'."\n" : '';
            } else {
                $httpsrequired = empty($HTTPSPAGEREQUIRED) ? '' : '?httpsrequired=1';
                $str .= ($scriptcount < 1) ? '<script type="text/javascript" src="'.
                         $CFG->httpswwwroot .'/lib/editor/xinha/XinhaCore.js'.$httpsrequired.'"></script>'."\n" : '';

            }
$scriptcount++;
    $str .= '<textarea class="form-textarea" id="'. $id .'" name="'. $name .'" rows="'. $rows .'" cols="'. $cols .'">';
    $str .= htmlspecialchars($value);
    $str .= '</textarea>'."\n";
    $str .= '<script type="text/javascript">
//<![CDATA[
document.write(\''.addslashes_js(editorshortcutshelpbutton()).'\');
//]]>
</script>';
    if ($return) {
        return $str;
    }
    echo $str;
       }
else
{
    $str .= '<textarea class="alltext" id="'. $id .'" name="'. $name .'" rows="'. $rows .'" cols="'. $cols .'">'; 
    $str .= s($value);
    $str .= '</textarea>'."\n";
    if ($return) {
        return $str;
    }
    echo $str;
}
}

For testing (other configuration files can be edited if needed) I added to standard theme meta.php the init code of Xinha:

<script type="text/javascript">
    _editor_url  = "<?php echo $CFG->wwwroot .'/lib/editor/xinha/' ?>";
    _editor_lang = "en";
  </script>
<script type="text/javascript">
xinha_editors = null;
    xinha_init    = null;
    xinha_config  = null;
    xinha_plugins = null;

    // This contains the names of textareas we will make into Xinha editors
    xinha_init = xinha_init ? xinha_init : function()
    {

      xinha_plugins = xinha_plugins ? xinha_plugins :
      [
       'CharacterMap',
       'ContextMenu',
       'ListType',
       'SpellChecker',
       'Stylist',
       'SuperClean',
       'TableOperations'
      ];
             if(!Xinha.loadPlugins(xinha_plugins, xinha_init)) return;

      xinha_editors = xinha_editors ? xinha_editors :
      [
        'form-textarea'
      ];

      xinha_config = xinha_config ? xinha_config() : new Xinha.Config();
      xinha_editors   = Xinha.makeEditors(xinha_editors, xinha_config, xinha_plugins);
      Xinha.startEditors(xinha_editors);
    }
</script>

Finally I edited in moodlelib.php function can_use_html_editor to let Safari and Opera to use editor. Worked beutifully!

Xinha uses mostly the same code as old htmlArea - Xinha even knows that it is was originally "htmlarea" and renames itself to Xinha.

I noticed that Xinha has an equation editor which renders MATHML. that's quite nice. However, in the online demo after creating my equation in the editor and clicking on submit, the preview becomes something like this:

• `dy/dx=2xx^2+int_1^2f(x)dx -a/(b+1)`

instead of the proper mathml rendering. Why do I not see the equation properly?