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Differences Between: [Versions 401 and 402] [Versions 401 and 403]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Contains the Guide grading form renderer in all of its glory
  19   *
  20   * @package    gradingform_guide
  21   * @copyright  2012 Dan Marsden <dan@danmarsden.com>
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  defined('MOODLE_INTERNAL') || die();
  26  
  27  /**
  28   * Grading method plugin renderer
  29   *
  30   * @package    gradingform_guide
  31   * @copyright  2012 Dan Marsden <dan@danmarsden.com>
  32   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  33   */
  34  class gradingform_guide_renderer extends plugin_renderer_base {
  35  
  36      /**
  37       * This function returns html code for displaying criterion. Depending on $mode it may be the
  38       * code to edit guide, to preview the guide, to evaluate somebody or to review the evaluation.
  39       *
  40       * This function may be called from display_guide() to display the whole guide, or it can be
  41       * called by itself to return a template used by JavaScript to add new empty criteria to the
  42       * guide being designed.
  43       * In this case it will use macros like {NAME}, {LEVELS}, {CRITERION-id}, etc.
  44       *
  45       * When overriding this function it is very important to remember that all elements of html
  46       * form (in edit or evaluate mode) must have the name $elementname.
  47       *
  48       * Also JavaScript relies on the class names of elements and when developer changes them
  49       * script might stop working.
  50       *
  51       * @param int $mode guide display mode, one of gradingform_guide_controller::DISPLAY_* {@link gradingform_guide_controller()}
  52       * @param array $options An array of options.
  53       *      showmarkspercriterionstudents (bool) If true adds the current score to the display
  54       * @param string $elementname the name of the form element (in editor mode) or the prefix for div ids (in view mode)
  55       * @param array $criterion criterion data
  56       * @param array $value (only in view mode) teacher's feedback on this criterion
  57       * @param array $validationerrors An array containing validation errors to be shown
  58       * @param array $comments Array of frequently used comments.
  59       * @return string
  60       */
  61      public function criterion_template($mode, $options, $elementname = '{NAME}', $criterion = null, $value = null,
  62                                         $validationerrors = null, $comments = null) {
  63  
  64          if ($criterion === null || !is_array($criterion) || !array_key_exists('id', $criterion)) {
  65              $criterion = array('id' => '{CRITERION-id}',
  66                                 'description' => '{CRITERION-description}',
  67                                 'sortorder' => '{CRITERION-sortorder}',
  68                                 'class' => '{CRITERION-class}',
  69                                 'descriptionmarkers' => '{CRITERION-descriptionmarkers}',
  70                                 'shortname' => '{CRITERION-shortname}',
  71                                 'maxscore' => '{CRITERION-maxscore}');
  72          } else {
  73              foreach (array('sortorder', 'description', 'class', 'shortname', 'descriptionmarkers', 'maxscore') as $key) {
  74                  // Set missing array elements to empty strings to avoid warnings.
  75                  if (!array_key_exists($key, $criterion)) {
  76                      $criterion[$key] = '';
  77                  }
  78              }
  79          }
  80  
  81          $criteriontemplate = html_writer::start_tag('tr', array('class' => 'criterion'. $criterion['class'],
  82              'id' => '{NAME}-criteria-{CRITERION-id}'));
  83          $descriptionclass = 'description';
  84          if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FULL) {
  85              $criteriontemplate .= html_writer::start_tag('td', array('class' => 'controls'));
  86              foreach (array('moveup', 'delete', 'movedown') as $key) {
  87                  $value = get_string('criterion'.$key, 'gradingform_guide');
  88                  $button = html_writer::empty_tag('input', array('type' => 'submit',
  89                      'name' => '{NAME}[criteria][{CRITERION-id}]['.$key.']',
  90                      'id' => '{NAME}-criteria-{CRITERION-id}-'.$key, 'value' => $value, 'title' => $value));
  91                  $criteriontemplate .= html_writer::tag('div', $button, array('class' => $key));
  92              }
  93              $criteriontemplate .= html_writer::end_tag('td'); // Controls.
  94              $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
  95                  'name' => '{NAME}[criteria][{CRITERION-id}][sortorder]', 'value' => $criterion['sortorder']));
  96  
  97              $shortnameinput = html_writer::empty_tag('input', array('type' => 'text',
  98                  'name' => '{NAME}[criteria][{CRITERION-id}][shortname]',
  99                  'id ' => '{NAME}-criteria-{CRITERION-id}-shortname',
 100                  'value' => $criterion['shortname'],
 101                  'aria-labelledby' => '{NAME}-criterion-name-label'));
 102              $shortname = html_writer::tag('div', $shortnameinput, array('class' => 'criterionname'));
 103              $descriptioninput = html_writer::tag('textarea', s($criterion['description']),
 104                  array('name' => '{NAME}[criteria][{CRITERION-id}][description]',
 105                        'id' => '{NAME}[criteria][{CRITERION-id}][description]', 'cols' => '65', 'rows' => '5'));
 106              $description = html_writer::tag('div', $descriptioninput, array('class' => 'criteriondesc'));
 107  
 108              $descriptionmarkersinput = html_writer::tag('textarea', s($criterion['descriptionmarkers']),
 109                  array('name' => '{NAME}[criteria][{CRITERION-id}][descriptionmarkers]',
 110                        'id' => '{NAME}[criteria][{CRITERION-id}][descriptionmarkers]', 'cols' => '65', 'rows' => '5'));
 111              $descriptionmarkers = html_writer::tag('div', $descriptionmarkersinput, array('class' => 'criteriondescmarkers'));
 112  
 113              $maxscore = html_writer::empty_tag('input', array('type'=> 'text',
 114                  'name' => '{NAME}[criteria][{CRITERION-id}][maxscore]', 'size' => '3',
 115                  'value' => $criterion['maxscore'],
 116                  'id' => '{NAME}[criteria][{CRITERION-id}][maxscore]'));
 117              $maxscore = html_writer::tag('div', $maxscore, array('class'=>'criterionmaxscore'));
 118          } else {
 119              if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FROZEN) {
 120                  $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
 121                      'name' => '{NAME}[criteria][{CRITERION-id}][sortorder]', 'value' => $criterion['sortorder']));
 122                  $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
 123                      'name' => '{NAME}[criteria][{CRITERION-id}][shortname]', 'value' => $criterion['shortname']));
 124                  $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
 125                      'name' => '{NAME}[criteria][{CRITERION-id}][description]', 'value' => $criterion['description']));
 126                  $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
 127                      'name' => '{NAME}[criteria][{CRITERION-id}][descriptionmarkers]', 'value' => $criterion['descriptionmarkers']));
 128                  $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
 129                      'name' => '{NAME}[criteria][{CRITERION-id}][maxscore]', 'value' => $criterion['maxscore']));
 130              } else if ($mode == gradingform_guide_controller::DISPLAY_EVAL ||
 131                         $mode == gradingform_guide_controller::DISPLAY_VIEW) {
 132                  $descriptionclass = 'descriptionreadonly';
 133              }
 134  
 135              $shortnameparams = array(
 136                  'name' => '{NAME}[criteria][{CRITERION-id}][shortname]',
 137                  'id' => '{NAME}[criteria][{CRITERION-id}][shortname]',
 138                  'aria-describedby' => '{NAME}-criterion-name-label'
 139              );
 140              $shortname = html_writer::div(s($criterion['shortname']), 'criterionshortname', $shortnameparams);
 141  
 142              $descmarkerclass = '';
 143              $descstudentclass = '';
 144              if ($mode == gradingform_guide_controller::DISPLAY_EVAL) {
 145                  if (!get_user_preferences('gradingform_guide-showmarkerdesc', true)) {
 146                      $descmarkerclass = ' hide';
 147                  }
 148                  if (!get_user_preferences('gradingform_guide-showstudentdesc', true)) {
 149                      $descstudentclass = ' hide';
 150                  }
 151              }
 152              $description = html_writer::tag('div', s($criterion['description']),
 153                  array('class'=>'criteriondescription'.$descstudentclass,
 154                        'name' => '{NAME}[criteria][{CRITERION-id}][descriptionmarkers]'));
 155              $descriptionmarkers   = html_writer::tag('div', s($criterion['descriptionmarkers']),
 156                  array('class'=>'criteriondescriptionmarkers'.$descmarkerclass,
 157                        'name' => '{NAME}[criteria][{CRITERION-id}][descriptionmarkers]'));
 158              $maxscore   = html_writer::tag('div', s($criterion['maxscore']),
 159                  array('class'=>'criteriondescriptionscore', 'name' => '{NAME}[criteria][{CRITERION-id}][maxscore]'));
 160  
 161              // Retain newlines as <br> tags when displaying the marking guide.
 162              $description = nl2br($description);
 163              $descriptionmarkers = nl2br($descriptionmarkers);
 164          }
 165  
 166          if (isset($criterion['error_description'])) {
 167              $descriptionclass .= ' error';
 168          }
 169  
 170          $title = $shortname;
 171          if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FULL ||
 172              $mode == gradingform_guide_controller::DISPLAY_PREVIEW) {
 173              $title .= html_writer::tag('label', get_string('descriptionstudents', 'gradingform_guide'),
 174                  array('for'=>'{NAME}[criteria][{CRITERION-id}][description]'));
 175              $title .= $description;
 176              $title .= html_writer::tag('label', get_string('descriptionmarkers', 'gradingform_guide'),
 177                  array('for'=>'{NAME}[criteria][{CRITERION-id}][descriptionmarkers]'));
 178              $title .= $descriptionmarkers;
 179              $title .=  html_writer::tag('label', get_string('maxscore', 'gradingform_guide'),
 180                  array('for'=>'{NAME}[criteria][{CRITERION-id}][maxscore]'));
 181              $title .= $maxscore;
 182          } else if ($mode == gradingform_guide_controller::DISPLAY_PREVIEW_GRADED ||
 183                     $mode == gradingform_guide_controller::DISPLAY_VIEW) {
 184              $title .= $description;
 185              if (!empty($options['showmarkspercriterionstudents'])) {
 186                  $title .= html_writer::label(get_string('maxscore', 'gradingform_guide'), null);
 187                  $title .= $maxscore;
 188              }
 189          } else {
 190              $title .= $description . $descriptionmarkers;
 191          }
 192  
 193          // Title cell params.
 194          $titletdparams = array(
 195              'class' => $descriptionclass,
 196              'id' => '{NAME}-criteria-{CRITERION-id}-shortname-cell'
 197          );
 198  
 199          if ($mode != gradingform_guide_controller::DISPLAY_EDIT_FULL &&
 200              $mode != gradingform_guide_controller::DISPLAY_EDIT_FROZEN) {
 201              // Set description's cell as tab-focusable.
 202              $titletdparams['tabindex'] = '0';
 203          }
 204  
 205          $criteriontemplate .= html_writer::tag('td', $title, $titletdparams);
 206  
 207          $currentremark = '';
 208          $currentscore = '';
 209          if (isset($value['remark'])) {
 210              $currentremark = $value['remark'];
 211          }
 212          if (isset($value['score'])) {
 213              $currentscore = $value['score'];
 214          }
 215  
 216          // Element ID of the remark text area.
 217          $remarkid = $elementname . '-criteria-' . $criterion['id'] . '-remark';
 218  
 219          if ($mode == gradingform_guide_controller::DISPLAY_EVAL) {
 220              $scoreclass = '';
 221              if (!empty($validationerrors[$criterion['id']]['score'])) {
 222                  $scoreclass = 'error';
 223                  $currentscore = $validationerrors[$criterion['id']]['score']; // Show invalid score in form.
 224              }
 225  
 226              // Grading remark text area parameters.
 227              $remarkparams = array(
 228                  'name' => '{NAME}[criteria][{CRITERION-id}][remark]',
 229                  'id' => $remarkid,
 230                  'cols' => '65', 'rows' => '5', 'class' => 'markingguideremark form-control',
 231                  'aria-labelledby' => '{NAME}-remarklabel{CRITERION-id}'
 232              );
 233  
 234              // Grading remark text area.
 235              $input = html_writer::tag('textarea', s($currentremark), $remarkparams);
 236  
 237              // Show the frequently-used comments chooser only if there are defined entries.
 238              $commentchooser = '';
 239              if (!empty($comments)) {
 240                  // Frequently used comments chooser.
 241                  $chooserbuttonid = 'criteria-' . $criterion['id'] . '-commentchooser';
 242                  $commentchooserparams = array('id' => $chooserbuttonid, 'class' => 'commentchooser btn btn-secondary');
 243                  $commentchooser = html_writer::tag('button', get_string('insertcomment', 'gradingform_guide'),
 244                      $commentchooserparams);
 245  
 246                  // Option items for the frequently used comments chooser dialog.
 247                  $commentoptions = array();
 248                  foreach ($comments as $id => $comment) {
 249                      $commentoption = new stdClass();
 250                      $commentoption->id = $id;
 251                      $commentoption->description = $comment['description'];
 252                      $commentoptions[] = $commentoption;
 253                  }
 254  
 255                  // Include string for JS for the comment chooser title.
 256                  $this->page->requires->string_for_js('insertcomment', 'gradingform_guide');
 257                  // Include comment_chooser module.
 258                  $this->page->requires->js_call_amd('gradingform_guide/comment_chooser', 'initialise',
 259                      array($criterion['id'], $chooserbuttonid, $remarkid, $commentoptions));
 260              }
 261  
 262              // Hidden marking guide remark label.
 263              $remarklabelparams = array(
 264                  'class' => 'hidden',
 265                  'id' => '{NAME}-remarklabel{CRITERION-id}'
 266              );
 267              $remarklabeltext = get_string('criterionremark', 'gradingform_guide', $criterion['shortname']);
 268              $remarklabel = html_writer::label($remarklabeltext, $remarkid, false, $remarklabelparams);
 269  
 270              $criteriontemplate .= html_writer::tag('td', $remarklabel . $input . $commentchooser, array('class' => 'remark'));
 271  
 272              // Score input and max score.
 273              $scoreinputparams = array(
 274                  'type' => 'text',
 275                  'name' => '{NAME}[criteria][{CRITERION-id}][score]',
 276                  'class' => $scoreclass . ' form-control',
 277                  'id' => '{NAME}-criteria-{CRITERION-id}-score',
 278                  'size' => '3',
 279                  'value' => $currentscore,
 280                  'aria-labelledby' => '{NAME}-score-label'
 281              );
 282              $score = html_writer::empty_tag('input', $scoreinputparams);
 283              $score .= html_writer::div('/' . s($criterion['maxscore']));
 284  
 285              $criteriontemplate .= html_writer::tag('td', $score, array('class' => 'score'));
 286          } else if ($mode == gradingform_guide_controller::DISPLAY_EVAL_FROZEN) {
 287              $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
 288                  'name' => '{NAME}[criteria][{CRITERION-id}][remark]', 'value' => $currentremark));
 289          } else if ($mode == gradingform_guide_controller::DISPLAY_REVIEW ||
 290              $mode == gradingform_guide_controller::DISPLAY_VIEW) {
 291  
 292              // Hidden marking guide remark description.
 293              $remarkdescparams = array(
 294                  'id' => '{NAME}-criteria-{CRITERION-id}-remark-desc'
 295              );
 296              $remarkdesctext = get_string('criterionremark', 'gradingform_guide', $criterion['shortname']);
 297              $remarkdesc = html_writer::div($remarkdesctext, 'hidden', $remarkdescparams);
 298  
 299              // Remarks cell.
 300              $remarkdiv = html_writer::div(s($currentremark));
 301              $remarkcellparams = array(
 302                  'class' => 'remark',
 303                  'tabindex' => '0',
 304                  'id' => '{NAME}-criteria-{CRITERION-id}-remark',
 305                  'aria-describedby' => '{NAME}-criteria-{CRITERION-id}-remark-desc'
 306              );
 307              $criteriontemplate .= html_writer::tag('td', $remarkdesc . $remarkdiv, $remarkcellparams);
 308  
 309              // Score cell.
 310              if (!empty($options['showmarkspercriterionstudents'])) {
 311                  $scorecellparams = array(
 312                      'class' => 'score',
 313                      'tabindex' => '0',
 314                      'id' => '{NAME}-criteria-{CRITERION-id}-score',
 315                      'aria-describedby' => '{NAME}-score-label'
 316                  );
 317                  $scorediv = html_writer::div(s($currentscore) . ' / ' . s($criterion['maxscore']));
 318                  $criteriontemplate .= html_writer::tag('td', $scorediv, $scorecellparams);
 319              }
 320          }
 321          $criteriontemplate .= html_writer::end_tag('tr'); // Criterion.
 322  
 323          $criteriontemplate = str_replace('{NAME}', $elementname, $criteriontemplate);
 324          $criteriontemplate = str_replace('{CRITERION-id}', $criterion['id'], $criteriontemplate);
 325          return $criteriontemplate;
 326      }
 327  
 328      /**
 329       * This function returns html code for displaying criterion. Depending on $mode it may be the
 330       * code to edit guide, to preview the guide, to evaluate somebody or to review the evaluation.
 331       *
 332       * This function may be called from display_guide() to display the whole guide, or it can be
 333       * called by itself to return a template used by JavaScript to add new empty criteria to the
 334       * guide being designed.
 335       * In this case it will use macros like {NAME}, {LEVELS}, {CRITERION-id}, etc.
 336       *
 337       * When overriding this function it is very important to remember that all elements of html
 338       * form (in edit or evaluate mode) must have the name $elementname.
 339       *
 340       * Also JavaScript relies on the class names of elements and when developer changes them
 341       * script might stop working.
 342       *
 343       * @param int $mode guide display mode, one of gradingform_guide_controller::DISPLAY_* {@link gradingform_guide_controller}
 344       * @param string $elementname the name of the form element (in editor mode) or the prefix for div ids (in view mode)
 345       * @param array $comment
 346       * @return string
 347       */
 348      public function comment_template($mode, $elementname = '{NAME}', $comment = null) {
 349          if ($comment === null || !is_array($comment) || !array_key_exists('id', $comment)) {
 350              $comment = array('id' => '{COMMENT-id}',
 351                  'description' => '{COMMENT-description}',
 352                  'sortorder' => '{COMMENT-sortorder}',
 353                  'class' => '{COMMENT-class}');
 354          } else {
 355              foreach (array('sortorder', 'description', 'class') as $key) {
 356                  // Set missing array elements to empty strings to avoid warnings.
 357                  if (!array_key_exists($key, $comment)) {
 358                      $criterion[$key] = '';
 359                  }
 360              }
 361          }
 362          $commenttemplate = html_writer::start_tag('tr', array('class' => 'criterion'. $comment['class'],
 363              'id' => '{NAME}-comments-{COMMENT-id}'));
 364          if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FULL) {
 365              $commenttemplate .= html_writer::start_tag('td', array('class' => 'controls'));
 366              foreach (array('moveup', 'delete', 'movedown') as $key) {
 367                  $value = get_string('comments'.$key, 'gradingform_guide');
 368                  $button = html_writer::empty_tag('input', array('type' => 'submit',
 369                      'name' => '{NAME}[comments][{COMMENT-id}]['.$key.']', 'id' => '{NAME}-comments-{COMMENT-id}-'.$key,
 370                      'value' => $value, 'title' => $value));
 371                  $commenttemplate .= html_writer::tag('div', $button, array('class' => $key));
 372              }
 373              $commenttemplate .= html_writer::end_tag('td'); // Controls.
 374              $commenttemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
 375                  'name' => '{NAME}[comments][{COMMENT-id}][sortorder]', 'value' => $comment['sortorder']));
 376              $description = html_writer::tag('textarea', s($comment['description']),
 377                  array('name' => '{NAME}[comments][{COMMENT-id}][description]',
 378                        'id' => '{NAME}-comments-{COMMENT-id}-description',
 379                        'aria-labelledby' => '{NAME}-comment-label', 'cols' => '65', 'rows' => '5'));
 380              $description = html_writer::tag('div', $description, array('class'=>'criteriondesc'));
 381          } else {
 382              if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FROZEN) {
 383                  $commenttemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
 384                      'name' => '{NAME}[comments][{COMMENT-id}][sortorder]', 'value' => $comment['sortorder']));
 385                  $commenttemplate .= html_writer::empty_tag('input', array('type' => 'hidden',
 386                      'name' => '{NAME}[comments][{COMMENT-id}][description]', 'value' => $comment['description']));
 387              }
 388              if ($mode == gradingform_guide_controller::DISPLAY_EVAL) {
 389                  $description = html_writer::tag('span', s($comment['description']),
 390                      array('name' => '{NAME}[comments][{COMMENT-id}][description]',
 391                            'title' => get_string('clicktocopy', 'gradingform_guide'),
 392                            'id' => '{NAME}[comments][{COMMENT-id}]', 'class'=>'markingguidecomment'));
 393              } else {
 394                  $description = s($comment['description']);
 395              }
 396              // Retain newlines as <br> tags when displaying 'frequently used comments'.
 397              $description = nl2br($description);
 398          }
 399          $descriptionclass = 'description';
 400          if (isset($comment['error_description'])) {
 401              $descriptionclass .= ' error';
 402          }
 403          $descriptioncellparams = array(
 404              'class' => $descriptionclass,
 405              'id' => '{NAME}-comments-{COMMENT-id}-description-cell'
 406          );
 407          // Make description cell tab-focusable when in review mode.
 408          if ($mode != gradingform_guide_controller::DISPLAY_EDIT_FULL &&
 409              $mode != gradingform_guide_controller::DISPLAY_EDIT_FROZEN) {
 410              $descriptioncellparams['tabindex'] = '0';
 411          }
 412          $commenttemplate .= html_writer::tag('td', $description, $descriptioncellparams);
 413          $commenttemplate .= html_writer::end_tag('tr'); // Criterion.
 414  
 415          $commenttemplate = str_replace('{NAME}', $elementname, $commenttemplate);
 416          $commenttemplate = str_replace('{COMMENT-id}', $comment['id'], $commenttemplate);
 417          return $commenttemplate;
 418      }
 419      /**
 420       * This function returns html code for displaying guide template (content before and after
 421       * criteria list). Depending on $mode it may be the code to edit guide, to preview the guide,
 422       * to evaluate somebody or to review the evaluation.
 423       *
 424       * This function is called from display_guide() to display the whole guide.
 425       *
 426       * When overriding this function it is very important to remember that all elements of html
 427       * form (in edit or evaluate mode) must have the name $elementname.
 428       *
 429       * Also JavaScript relies on the class names of elements and when developer changes them
 430       * script might stop working.
 431       *
 432       * @param int $mode guide display mode, one of gradingform_guide_controller::DISPLAY_* {@link gradingform_guide_controller}
 433       * @param array $options An array of options provided to {@link gradingform_guide_renderer::guide_edit_options()}
 434       * @param string $elementname the name of the form element (in editor mode) or the prefix for div ids (in view mode)
 435       * @param string $criteriastr evaluated templates for this guide's criteria
 436       * @param string $commentstr
 437       * @return string
 438       */
 439      protected function guide_template($mode, $options, $elementname, $criteriastr, $commentstr) {
 440          $classsuffix = ''; // CSS suffix for class of the main div. Depends on the mode.
 441          switch ($mode) {
 442              case gradingform_guide_controller::DISPLAY_EDIT_FULL:
 443                  $classsuffix = ' editor editable';
 444                  break;
 445              case gradingform_guide_controller::DISPLAY_EDIT_FROZEN:
 446                  $classsuffix = ' editor frozen';
 447                  break;
 448              case gradingform_guide_controller::DISPLAY_PREVIEW:
 449              case gradingform_guide_controller::DISPLAY_PREVIEW_GRADED:
 450                  $classsuffix = ' editor preview';
 451                  break;
 452              case gradingform_guide_controller::DISPLAY_EVAL:
 453                  $classsuffix = ' evaluate editable';
 454                  break;
 455              case gradingform_guide_controller::DISPLAY_EVAL_FROZEN:
 456                  $classsuffix = ' evaluate frozen';
 457                  break;
 458              case gradingform_guide_controller::DISPLAY_REVIEW:
 459                  $classsuffix = ' review';
 460                  break;
 461              case gradingform_guide_controller::DISPLAY_VIEW:
 462                  $classsuffix = ' view';
 463                  break;
 464          }
 465  
 466          $guidetemplate = html_writer::start_tag('div', array('id' => 'guide-{NAME}',
 467              'class' => 'clearfix gradingform_guide'.$classsuffix));
 468  
 469          // Hidden guide label.
 470          $guidedescparams = array(
 471              'id' => 'guide-{NAME}-desc',
 472              'aria-hidden' => 'true'
 473          );
 474          $guidetemplate .= html_writer::div(get_string('guide', 'gradingform_guide'), 'hidden', $guidedescparams);
 475  
 476          // Hidden criterion name label/description.
 477          $guidetemplate .= html_writer::div(get_string('criterionname', 'gradingform_guide'), 'hidden',
 478              array('id' => '{NAME}-criterion-name-label'));
 479  
 480          // Hidden score label/description.
 481          $guidetemplate .= html_writer::div(get_string('score', 'gradingform_guide'), 'hidden', array('id' => '{NAME}-score-label'));
 482  
 483          // Criteria table parameters.
 484          $criteriatableparams = array(
 485              'class' => 'criteria',
 486              'id' => '{NAME}-criteria',
 487              'aria-describedby' => 'guide-{NAME}-desc');
 488          $guidetemplate .= html_writer::tag('table', $criteriastr, $criteriatableparams);
 489          if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FULL) {
 490              $value = get_string('addcriterion', 'gradingform_guide');
 491              $input = html_writer::empty_tag('input', array('type' => 'submit', 'name' => '{NAME}[criteria][addcriterion]',
 492                  'id' => '{NAME}-criteria-addcriterion', 'value' => $value, 'title' => $value));
 493              $guidetemplate .= html_writer::tag('div', $input, array('class' => 'addcriterion'));
 494          }
 495  
 496          if (!empty($commentstr)) {
 497              $guidetemplate .= html_writer::div(get_string('comments', 'gradingform_guide'), 'commentheader',
 498                  array('id' => '{NAME}-comments-label'));
 499              $guidetemplate .= html_writer::div(get_string('comment', 'gradingform_guide'), 'hidden',
 500                  array('id' => '{NAME}-comment-label', 'aria-hidden' => 'true'));
 501              $commentstableparams = array(
 502                  'class' => 'comments',
 503                  'id' => '{NAME}-comments',
 504                  'aria-describedby' => '{NAME}-comments-label');
 505              $guidetemplate .= html_writer::tag('table', $commentstr, $commentstableparams);
 506          }
 507          if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FULL) {
 508              $value = get_string('addcomment', 'gradingform_guide');
 509              $input = html_writer::empty_tag('input', array('type' => 'submit', 'name' => '{NAME}[comments][addcomment]',
 510                  'id' => '{NAME}-comments-addcomment', 'value' => $value, 'title' => $value));
 511              $guidetemplate .= html_writer::tag('div', $input, array('class' => 'addcomment'));
 512          }
 513  
 514          $guidetemplate .= $this->guide_edit_options($mode, $options);
 515          $guidetemplate .= html_writer::end_tag('div');
 516  
 517          return str_replace('{NAME}', $elementname, $guidetemplate);
 518      }
 519  
 520      /**
 521       * Generates html template to view/edit the guide options. Expression {NAME} is used in
 522       * template for the form element name
 523       *
 524       * @param int $mode guide display mode, one of gradingform_guide_controller::DISPLAY_* {@link gradingform_guide_controller}
 525       * @param array $options
 526       * @return string
 527       */
 528      protected function guide_edit_options($mode, $options) {
 529          if ($mode != gradingform_guide_controller::DISPLAY_EDIT_FULL
 530              && $mode != gradingform_guide_controller::DISPLAY_EDIT_FROZEN
 531              && $mode != gradingform_guide_controller::DISPLAY_PREVIEW) {
 532              // Options are displayed only for people who can manage.
 533              return;
 534          }
 535          $html = html_writer::start_tag('div', array('class' => 'options'));
 536          $html .= html_writer::tag('div', get_string('guideoptions', 'gradingform_guide'), array('class' => 'optionsheading'));
 537          $attrs = array('type' => 'hidden', 'name' => '{NAME}[options][optionsset]', 'value' => 1, 'class' => 'form-control');
 538          $html .= html_writer::empty_tag('input', $attrs);
 539          foreach ($options as $option => $value) {
 540              $html .= html_writer::start_tag('div', array('class' => 'option '.$option));
 541              $attrs = array('name' => '{NAME}[options]['.$option.']', 'id' => '{NAME}-options-'.$option);
 542              switch ($option) {
 543                  case 'sortlevelsasc':
 544                      // Display option as dropdown.
 545                      $html .= html_writer::tag('span', get_string($option, 'gradingform_guide'), array('class' => 'label'));
 546                      $value = (int)(!!$value); // Make sure $value is either 0 or 1.
 547                      if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FULL) {
 548                          $selectoptions = array(0 => get_string($option.'0', 'gradingform_guide'),
 549                              1 => get_string($option.'1', 'gradingform_guide'));
 550                          $valuestr = html_writer::select($selectoptions, $attrs['name'], $value, false, array('id' => $attrs['id']));
 551                          $html .= html_writer::tag('span', $valuestr, array('class' => 'value'));
 552                          // TODO add here button 'Sort levels'.
 553                      } else {
 554                          $html .= html_writer::tag('span', get_string($option.$value, 'gradingform_guide'),
 555                              array('class' => 'value'));
 556                          if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FROZEN) {
 557                              $html .= html_writer::empty_tag('input', $attrs + array('type' => 'hidden', 'value' => $value));
 558                          }
 559                      }
 560                      break;
 561                  default:
 562                      if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FROZEN && $value) {
 563                          $html .= html_writer::empty_tag('input', $attrs + array('type' => 'hidden', 'value' => $value));
 564                      }
 565                      // Display option as checkbox.
 566                      $attrs['type'] = 'checkbox';
 567                      $attrs['value'] = 1;
 568                      if ($value) {
 569                          $attrs['checked'] = 'checked';
 570                      }
 571                      if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FROZEN ||
 572                          $mode == gradingform_guide_controller::DISPLAY_PREVIEW) {
 573                          $attrs['disabled'] = 'disabled';
 574                          unset($attrs['name']);
 575                      }
 576                      $html .= html_writer::empty_tag('input', $attrs);
 577                      $html .= html_writer::tag('label', get_string($option, 'gradingform_guide'), array('for' => $attrs['id']));
 578                      break;
 579              }
 580              $html .= html_writer::end_tag('div'); // Option.
 581          }
 582          $html .= html_writer::end_tag('div'); // Options.
 583          return $html;
 584      }
 585  
 586      /**
 587       * This function returns html code for displaying guide. Depending on $mode it may be the code
 588       * to edit guide, to preview the guide, to evaluate somebody or to review the evaluation.
 589       *
 590       * It is very unlikely that this function needs to be overriden by theme. It does not produce
 591       * any html code, it just prepares data about guide design and evaluation, adds the CSS
 592       * class to elements and calls the functions level_template, criterion_template and
 593       * guide_template
 594       *
 595       * @param array $criteria data about the guide design
 596       * @param array $comments
 597       * @param array $options
 598       * @param int $mode guide display mode, one of gradingform_guide_controller::DISPLAY_* {@link gradingform_guide_controller}
 599       * @param string $elementname the name of the form element (in editor mode) or the prefix for div ids (in view mode)
 600       * @param array $values evaluation result
 601       * @param array $validationerrors
 602       * @return string
 603       */
 604      public function display_guide($criteria, $comments, $options, $mode, $elementname = null, $values = null,
 605                                    $validationerrors = null) {
 606          $criteriastr = '';
 607          $cnt = 0;
 608          foreach ($criteria as $id => $criterion) {
 609              $criterion['class'] = $this->get_css_class_suffix($cnt++, count($criteria) -1);
 610              $criterion['id'] = $id;
 611              if (isset($values['criteria'][$id])) {
 612                  $criterionvalue = $values['criteria'][$id];
 613              } else {
 614                  $criterionvalue = null;
 615              }
 616              $criteriastr .= $this->criterion_template($mode, $options, $elementname, $criterion, $criterionvalue,
 617                                                        $validationerrors, $comments);
 618          }
 619  
 620          $cnt = 0;
 621          $commentstr = '';
 622          // Check if comments should be displayed.
 623          if ($mode == gradingform_guide_controller::DISPLAY_EDIT_FULL ||
 624              $mode == gradingform_guide_controller::DISPLAY_EDIT_FROZEN ||
 625              $mode == gradingform_guide_controller::DISPLAY_PREVIEW ||
 626              $mode == gradingform_guide_controller::DISPLAY_EVAL_FROZEN) {
 627  
 628              foreach ($comments as $id => $comment) {
 629                  $comment['id'] = $id;
 630                  $comment['class'] = $this->get_css_class_suffix($cnt++, count($comments) -1);
 631                  $commentstr .= $this->comment_template($mode, $elementname, $comment);
 632              }
 633          }
 634          $output = $this->guide_template($mode, $options, $elementname, $criteriastr, $commentstr);
 635          if ($mode == gradingform_guide_controller::DISPLAY_EVAL) {
 636              $showdesc = get_user_preferences('gradingform_guide-showmarkerdesc', true);
 637              $showdescstud = get_user_preferences('gradingform_guide-showstudentdesc', true);
 638              $checked1 = array();
 639              $checked2 = array();
 640              $checked_s1 = array();
 641              $checked_s2 = array();
 642              $checked = array('checked' => 'checked');
 643              if ($showdesc) {
 644                  $checked1 = $checked;
 645              } else {
 646                  $checked2 = $checked;
 647              }
 648              if ($showdescstud) {
 649                  $checked_s1 = $checked;
 650              } else {
 651                  $checked_s2 = $checked;
 652              }
 653  
 654              $radio1 = html_writer::tag('input', get_string('showmarkerdesc', 'gradingform_guide'), array('type' => 'radio',
 655                  'name' => 'showmarkerdesc',
 656                  'value' => "true")+$checked1);
 657              $radio1 = html_writer::tag('label', $radio1);
 658              $radio2 = html_writer::tag('input', get_string('hidemarkerdesc', 'gradingform_guide'), array('type' => 'radio',
 659                  'name' => 'showmarkerdesc',
 660                  'value' => "false")+$checked2);
 661              $radio2 = html_writer::tag('label', $radio2);
 662              $output .= html_writer::tag('div', $radio1 . $radio2, array('class' => 'showmarkerdesc'));
 663  
 664              $radio1 = html_writer::tag('input', get_string('showstudentdesc', 'gradingform_guide'), array('type' => 'radio',
 665                  'name' => 'showstudentdesc',
 666                  'value' => "true")+$checked_s1);
 667              $radio1 = html_writer::tag('label', $radio1);
 668              $radio2 = html_writer::tag('input', get_string('hidestudentdesc', 'gradingform_guide'), array('type' => 'radio',
 669                  'name' => 'showstudentdesc',
 670                  'value' => "false")+$checked_s2);
 671              $radio2 = html_writer::tag('label', $radio2);
 672              $output .= html_writer::tag('div', $radio1 . $radio2, array('class' => 'showstudentdesc'));
 673          }
 674          return $output;
 675      }
 676  
 677      /**
 678       * Help function to return CSS class names for element (first/last/even/odd) with leading space
 679       *
 680       * @param int $idx index of this element in the row/column
 681       * @param int $maxidx maximum index of the element in the row/column
 682       * @return string
 683       */
 684      protected function get_css_class_suffix($idx, $maxidx) {
 685          $class = '';
 686          if ($idx == 0) {
 687              $class .= ' first';
 688          }
 689          if ($idx == $maxidx) {
 690              $class .= ' last';
 691          }
 692          if ($idx % 2) {
 693              $class .= ' odd';
 694          } else {
 695              $class .= ' even';
 696          }
 697          return $class;
 698      }
 699  
 700      /**
 701       * Displays for the student the list of instances or default content if no instances found
 702       *
 703       * @param array $instances array of objects of type gradingform_guide_instance
 704       * @param string $defaultcontent default string that would be displayed without advanced grading
 705       * @param bool $cangrade whether current user has capability to grade in this context
 706       * @return string
 707       */
 708      public function display_instances($instances, $defaultcontent, $cangrade) {
 709          $return = '';
 710          if (count($instances)) {
 711              $return .= html_writer::start_tag('div', array('class' => 'advancedgrade'));
 712              $idx = 0;
 713              foreach ($instances as $instance) {
 714                  $return .= $this->display_instance($instance, $idx++, $cangrade);
 715              }
 716              $return .= html_writer::end_tag('div');
 717          }
 718          return $return. $defaultcontent;
 719      }
 720  
 721      /**
 722       * Displays one grading instance
 723       *
 724       * @param gradingform_guide_instance $instance
 725       * @param int $idx unique number of instance on page
 726       * @param bool $cangrade whether current user has capability to grade in this context
 727       */
 728      public function display_instance(gradingform_guide_instance $instance, $idx, $cangrade) {
 729          $criteria = $instance->get_controller()->get_definition()->guide_criteria;
 730          $options = $instance->get_controller()->get_options();
 731          $values = $instance->get_guide_filling();
 732          if ($cangrade) {
 733              $mode = gradingform_guide_controller::DISPLAY_REVIEW;
 734          } else {
 735              $mode = gradingform_guide_controller::DISPLAY_VIEW;
 736          }
 737  
 738          $output = $this->box($instance->get_controller()->get_formatted_description(), 'gradingform_guide-description').
 739                    $this->display_guide($criteria, array(), $options, $mode, 'guide'.$idx, $values);
 740          return $output;
 741      }
 742  
 743  
 744      /**
 745       * Displays a confirmation message after a regrade has occured
 746       *
 747       * @param string $elementname
 748       * @param int $changelevel
 749       * @param int $value The regrade option that was used
 750       * @return string
 751       */
 752      public function display_regrade_confirmation($elementname, $changelevel, $value) {
 753          $html = html_writer::start_tag('div', array('class' => 'gradingform_guide-regrade', 'role' => 'alert'));
 754          if ($changelevel<=2) {
 755              $html .= get_string('regrademessage1', 'gradingform_guide');
 756              $selectoptions = array(
 757                  0 => get_string('regradeoption0', 'gradingform_guide'),
 758                  1 => get_string('regradeoption1', 'gradingform_guide')
 759              );
 760              $html .= html_writer::select($selectoptions, $elementname.'[regrade]', $value, false);
 761          } else {
 762              $html .= get_string('regrademessage5', 'gradingform_guide');
 763              $html .= html_writer::empty_tag('input', array('name' => $elementname.'[regrade]', 'value' => 1, 'type' => 'hidden'));
 764          }
 765          $html .= html_writer::end_tag('div');
 766          return $html;
 767      }
 768      /**
 769       * Generates and returns HTML code to display information box about how guide score is converted to the grade
 770       *
 771       * @param array $scores
 772       * @return string
 773       */
 774      public function display_guide_mapping_explained($scores) {
 775          $html = '';
 776          if (!$scores) {
 777              return $html;
 778          }
 779          if (isset($scores['modulegrade']) && $scores['maxscore'] != $scores['modulegrade']) {
 780              $html .= $this->box(html_writer::tag('div', get_string('guidemappingexplained', 'gradingform_guide', (object)$scores))
 781                  , 'generalbox gradingform_guide-error');
 782          }
 783  
 784          return $html;
 785      }
 786  }