Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * Contains renderer used for displaying rubric

 *

 * @package    gradingform_rubric

 * @copyright  2011 Marina Glancy

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

defined('MOODLE_INTERNAL') || die();

/**

 * Grading method plugin renderer

 *

 * @package    gradingform_rubric

 * @copyright  2011 Marina Glancy

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class gradingform_rubric_renderer extends plugin_renderer_base {

    /**

     * This function returns html code for displaying criterion. Depending on $mode it may be the

     * code to edit rubric, to preview the rubric, to evaluate somebody or to review the evaluation.

     *

     * This function may be called from display_rubric() to display the whole rubric, or it can be

     * called by itself to return a template used by JavaScript to add new empty criteria to the

     * rubric being designed.

     * In this case it will use macros like {NAME}, {LEVELS}, {CRITERION-id}, etc.

     *

     * When overriding this function it is very important to remember that all elements of html

     * form (in edit or evaluate mode) must have the name $elementname.

     *

     * Also JavaScript relies on the class names of elements and when developer changes them

     * script might stop working.

     *

     * @param int $mode rubric display mode, see {@link gradingform_rubric_controller}

     * @param array $options display options for this rubric, defaults are: {@link gradingform_rubric_controller::get_default_options()}

     * @param string $elementname the name of the form element (in editor mode) or the prefix for div ids (in view mode)

     * @param array|null $criterion criterion data

     * @param string $levelsstr evaluated templates for this criterion levels

     * @param array|null $value (only in view mode) teacher's feedback on this criterion

     * @return string

     */

    public function criterion_template($mode, $options, $elementname = '{NAME}', $criterion = null, $levelsstr = '{LEVELS}', $value = null) {

        // TODO MDL-31235 description format, remark format

        if ($criterion === null || !is_array($criterion) || !array_key_exists('id', $criterion)) {

            $criterion = array('id' => '{CRITERION-id}', 'description' => '{CRITERION-description}', 'sortorder' => '{CRITERION-sortorder}', 'class' => '{CRITERION-class}');

        } else {

            foreach (array('sortorder', 'description', 'class') as $key) {

                // set missing array elements to empty strings to avoid warnings

                if (!array_key_exists($key, $criterion)) {

                    $criterion[$key] = '';

                }

            }

        }

        $criteriontemplate = html_writer::start_tag('tr', array('class' => 'criterion'. $criterion['class'], 'id' => '{NAME}-criteria-{CRITERION-id}'));

        if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FULL) {

            $criteriontemplate .= html_writer::start_tag('td', array('class' => 'controls'));

            foreach (array('moveup', 'delete', 'movedown', 'duplicate') as $key) {

                $value = get_string('criterion'.$key, 'gradingform_rubric');

                $button = html_writer::empty_tag('input', array('type' => 'submit', 'name' => '{NAME}[criteria][{CRITERION-id}]['.$key.']',

                    'id' => '{NAME}-criteria-{CRITERION-id}-'.$key, 'value' => $value));

                $criteriontemplate .= html_writer::tag('div', $button, array('class' => $key));

            }

            $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden',

                                                                        'name' => '{NAME}[criteria][{CRITERION-id}][sortorder]',

                                                                        'value' => $criterion['sortorder']));

            $criteriontemplate .= html_writer::end_tag('td'); // .controls

            // Criterion description text area.

            $descriptiontextareaparams = array(

                'name' => '{NAME}[criteria][{CRITERION-id}][description]',

                'id' => '{NAME}-criteria-{CRITERION-id}-description',

                'aria-label' => get_string('criterion', 'gradingform_rubric', ''),

                'cols' => '10', 'rows' => '5'

            );

            $description = html_writer::tag('textarea', s($criterion['description']), $descriptiontextareaparams);

        } else {

            if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FROZEN) {

                $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => '{NAME}[criteria][{CRITERION-id}][sortorder]', 'value' => $criterion['sortorder']));

                $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => '{NAME}[criteria][{CRITERION-id}][description]', 'value' => $criterion['description']));

            }

            $description = s($criterion['description']);

        }

        $descriptionclass = 'description';

        if (isset($criterion['error_description'])) {

            $descriptionclass .= ' error';

        }

        // Description cell params.

        $descriptiontdparams = array(

            'class' => $descriptionclass,

            'id' => '{NAME}-criteria-{CRITERION-id}-description-cell'

        );

        if ($mode != gradingform_rubric_controller::DISPLAY_EDIT_FULL &&

            $mode != gradingform_rubric_controller::DISPLAY_EDIT_FROZEN) {

            // Set description's cell as tab-focusable.

            $descriptiontdparams['tabindex'] = '0';

            // Set label for the criterion cell.

            $descriptiontdparams['aria-label'] = get_string('criterion', 'gradingform_rubric', s($criterion['description']));

        }

        // Default value for criterion ids.

        // Edge case: submitting empty grade when remark field is disabled.

        // Reason: we need the criteria keys for the clear_attempt to clear the rubric fillings.

        if ($mode == gradingform_rubric_controller::DISPLAY_EVAL) {

            $criteriontemplate .= html_writer::empty_tag('input', [

                'type' => 'hidden',

                'name' => '{NAME}[criteria][{CRITERION-id}][]',

            ]);

        }

        // Description cell.

        $criteriontemplate .= html_writer::tag('td', $description, $descriptiontdparams);

        // Levels table.

        $levelsrowparams = [

            'id' => '{NAME}-criteria-{CRITERION-id}-levels',

            'aria-label' => get_string('levelsgroup', 'gradingform_rubric'),

        ];

        // Add radiogroup role only when not previewing or editing.

        $isradiogroup = !in_array($mode, [

            gradingform_rubric_controller::DISPLAY_EDIT_FULL,

            gradingform_rubric_controller::DISPLAY_EDIT_FROZEN,

            gradingform_rubric_controller::DISPLAY_PREVIEW,

            gradingform_rubric_controller::DISPLAY_PREVIEW_GRADED,

        ]);

        $levelsrowparams['role'] = $isradiogroup ? 'radiogroup' : 'list';

        $levelsrow = html_writer::tag('tr', $levelsstr, $levelsrowparams);

        $levelstableparams = [

            'id' => '{NAME}-criteria-{CRITERION-id}-levels-table',

            'role' => 'none',

        ];

        $levelsstrtable = html_writer::tag('table', $levelsrow, $levelstableparams);

        $levelsclass = 'levels';

        if (isset($criterion['error_levels'])) {

            $levelsclass .= ' error';

        }

        $criteriontemplate .= html_writer::tag('td', $levelsstrtable, array('class' => $levelsclass));

        if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FULL) {

            $value = get_string('criterionaddlevel', 'gradingform_rubric');

            $button = html_writer::empty_tag('input', array('type' => 'submit', 'name' => '{NAME}[criteria][{CRITERION-id}][levels][addlevel]',

                'id' => '{NAME}-criteria-{CRITERION-id}-levels-addlevel', 'value' => $value, 'class' => 'btn btn-secondary'));

            $criteriontemplate .= html_writer::tag('td', $button, array('class' => 'addlevel'));

        }

        $displayremark = ($options['enableremarks'] && ($mode != gradingform_rubric_controller::DISPLAY_VIEW || $options['showremarksstudent']));

        if ($displayremark) {

            $currentremark = '';

            if (isset($value['remark'])) {

                $currentremark = $value['remark'];

            }

            // Label for criterion remark.

            $remarkinfo = new stdClass();

            $remarkinfo->description = s($criterion['description']);

            $remarkinfo->remark = $currentremark;

            $remarklabeltext = get_string('criterionremark', 'gradingform_rubric', $remarkinfo);

            if ($mode == gradingform_rubric_controller::DISPLAY_EVAL) {

                // HTML parameters for remarks text area.

                $remarkparams = array(

                    'name' => '{NAME}[criteria][{CRITERION-id}][remark]',

                    'id' => '{NAME}-criteria-{CRITERION-id}-remark',

                    'cols' => '10', 'rows' => '5',

                    'aria-label' => $remarklabeltext

                );

                $input = html_writer::tag('textarea', s($currentremark), $remarkparams);

                $criteriontemplate .= html_writer::tag('td', $input, array('class' => 'remark'));

            } else if ($mode == gradingform_rubric_controller::DISPLAY_EVAL_FROZEN) {

                $criteriontemplate .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => '{NAME}[criteria][{CRITERION-id}][remark]', 'value' => $currentremark));

            }else if ($mode == gradingform_rubric_controller::DISPLAY_REVIEW || $mode == gradingform_rubric_controller::DISPLAY_VIEW) {

                // HTML parameters for remarks cell.

                $remarkparams = array(

                    'class' => 'remark',

                    'tabindex' => '0',

                    'id' => '{NAME}-criteria-{CRITERION-id}-remark',

                    'aria-label' => $remarklabeltext

                );

                $criteriontemplate .= html_writer::tag('td', s($currentremark), $remarkparams);

            }

        }

        $criteriontemplate .= html_writer::end_tag('tr'); // .criterion

        $criteriontemplate = str_replace('{NAME}', $elementname, $criteriontemplate);

        $criteriontemplate = str_replace('{CRITERION-id}', $criterion['id'], $criteriontemplate);

        return $criteriontemplate;

    }

    /**

     * This function returns html code for displaying one level of one criterion. Depending on $mode

     * it may be the code to edit rubric, to preview the rubric, to evaluate somebody or to review the evaluation.

     *

     * This function may be called from display_rubric() to display the whole rubric, or it can be

     * called by itself to return a template used by JavaScript to add new empty level to the

     * criterion during the design of rubric.

     * In this case it will use macros like {NAME}, {CRITERION-id}, {LEVEL-id}, etc.

     *

     * When overriding this function it is very important to remember that all elements of html

     * form (in edit or evaluate mode) must have the name $elementname.

     *

     * Also JavaScript relies on the class names of elements and when developer changes them

     * script might stop working.

     *

     * @param int $mode rubric display mode see {@link gradingform_rubric_controller}

     * @param array $options display options for this rubric, defaults are: {@link gradingform_rubric_controller::get_default_options()}

     * @param string $elementname the name of the form element (in editor mode) or the prefix for div ids (in view mode)

     * @param string|int $criterionid either id of the nesting criterion or a macro for template

     * @param array|null $level level data, also in view mode it might also have property $level['checked'] whether this level is checked

     * @return string

     */

    public function level_template($mode, $options, $elementname = '{NAME}', $criterionid = '{CRITERION-id}', $level = null) {

        // TODO MDL-31235 definition format

        if (!isset($level['id'])) {

            $level = array('id' => '{LEVEL-id}', 'definition' => '{LEVEL-definition}', 'score' => '{LEVEL-score}', 'class' => '{LEVEL-class}', 'checked' => false);

        } else {

            foreach (array('score', 'definition', 'class', 'checked', 'index') as $key) {

                // set missing array elements to empty strings to avoid warnings

                if (!array_key_exists($key, $level)) {

                    $level[$key] = '';

                }

            }

        }

        // Get level index.

        $levelindex = isset($level['index']) ? $level['index'] : '{LEVEL-index}';

        // Template for one level within one criterion

        $tdattributes = array(

            'id' => '{NAME}-criteria-{CRITERION-id}-levels-{LEVEL-id}',

            'class' => 'text-break level' . $level['class']

        );

        if (isset($level['tdwidth'])) {

            $tdattributes['style'] = "width: " . round($level['tdwidth']).'%;';

        }

        $leveltemplate = html_writer::start_tag('div', array('class' => 'level-wrapper'));

        if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FULL) {

            $definitionparams = array(

                'id' => '{NAME}-criteria-{CRITERION-id}-levels-{LEVEL-id}-definition',

                'name' => '{NAME}[criteria][{CRITERION-id}][levels][{LEVEL-id}][definition]',

                'aria-label' => get_string('leveldefinition', 'gradingform_rubric', $levelindex),

                'cols' => '10', 'rows' => '4'

            );

            $definition = html_writer::tag('textarea', s($level['definition']), $definitionparams);

            $scoreparams = array(

                'type' => 'text',

                'id' => '{NAME}[criteria][{CRITERION-id}][levels][{LEVEL-id}][score]',

                'name' => '{NAME}[criteria][{CRITERION-id}][levels][{LEVEL-id}][score]',

                'aria-label' => get_string('scoreinputforlevel', 'gradingform_rubric', $levelindex),

                'size' => '3',

                'value' => $level['score']

            );

            $score = html_writer::empty_tag('input', $scoreparams);

        } else {

            if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FROZEN) {

                $leveltemplate .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => '{NAME}[criteria][{CRITERION-id}][levels][{LEVEL-id}][definition]', 'value' => $level['definition']));

                $leveltemplate .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => '{NAME}[criteria][{CRITERION-id}][levels][{LEVEL-id}][score]', 'value' => $level['score']));

            }

            $definition = s($level['definition']);

            $score = $level['score'];

        }

        if ($mode == gradingform_rubric_controller::DISPLAY_EVAL) {

            $levelradioparams = array(

                'type' => 'radio',

                'id' => '{NAME}-criteria-{CRITERION-id}-levels-{LEVEL-id}-definition',

                'name' => '{NAME}[criteria][{CRITERION-id}][levelid]',

                'value' => $level['id']

            );

            if ($level['checked']) {

                $levelradioparams['checked'] = 'checked';

            }

            $input = html_writer::empty_tag('input', $levelradioparams);

            $leveltemplate .= html_writer::div($input, 'radio');

        }

        if ($mode == gradingform_rubric_controller::DISPLAY_EVAL_FROZEN && $level['checked']) {

            $leveltemplate .= html_writer::empty_tag('input',

                array(

                    'type' => 'hidden',

                    'name' => '{NAME}[criteria][{CRITERION-id}][levelid]',

                    'value' => $level['id']

                )

            );

        }

        $score = html_writer::tag('span', $score, array('id' => '{NAME}-criteria-{CRITERION-id}-levels-{LEVEL-id}-score', 'class' => 'scorevalue'));

        $definitionclass = 'definition';

        if (isset($level['error_definition'])) {

            $definitionclass .= ' error';

        }

        if ($mode != gradingform_rubric_controller::DISPLAY_EDIT_FULL &&

            $mode != gradingform_rubric_controller::DISPLAY_EDIT_FROZEN) {

            $tdattributes['tabindex'] = '0';

            $levelinfo = new stdClass();

            $levelinfo->definition = s($level['definition']);

            $levelinfo->score = $level['score'];

            $tdattributes['aria-label'] = get_string('level', 'gradingform_rubric', $levelinfo);

            if ($mode != gradingform_rubric_controller::DISPLAY_PREVIEW &&

                $mode != gradingform_rubric_controller::DISPLAY_PREVIEW_GRADED) {

                // Add role of radio button to level cell if not in edit and preview mode.

                $tdattributes['role'] = 'radio';

                if ($level['checked']) {

                    $tdattributes['aria-checked'] = 'true';

                } else {

                    $tdattributes['aria-checked'] = 'false';

                }

            } else {

                $tdattributes['role'] = 'listitem';

            }

        } else {

            $tdattributes['role'] = 'listitem';

        }

        $leveltemplateparams = array(

            'id' => '{NAME}-criteria-{CRITERION-id}-levels-{LEVEL-id}-definition-container'

        );

        $leveltemplate .= html_writer::div($definition, $definitionclass, $leveltemplateparams);

        $displayscore = true;

        if (!$options['showscoreteacher'] && in_array($mode, array(gradingform_rubric_controller::DISPLAY_EVAL, gradingform_rubric_controller::DISPLAY_EVAL_FROZEN, gradingform_rubric_controller::DISPLAY_REVIEW))) {

            $displayscore = false;

        }

        if (!$options['showscorestudent'] && in_array($mode, array(gradingform_rubric_controller::DISPLAY_VIEW, gradingform_rubric_controller::DISPLAY_PREVIEW_GRADED))) {

            $displayscore = false;

        }

        if ($displayscore) {

            $scoreclass = 'score d-inline';

            if (isset($level['error_score'])) {

                $scoreclass .= ' error';

            }

            $leveltemplate .= html_writer::tag('div', get_string('scorepostfix', 'gradingform_rubric', $score), array('class' => $scoreclass));

        }

        if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FULL) {

            $value = get_string('leveldelete', 'gradingform_rubric', $levelindex);

            $buttonparams = array(

                'type' => 'submit',

                'name' => '{NAME}[criteria][{CRITERION-id}][levels][{LEVEL-id}][delete]',

                'id' => '{NAME}-criteria-{CRITERION-id}-levels-{LEVEL-id}-delete',

                'value' => $value

            );

            $button = html_writer::empty_tag('input', $buttonparams);

            $leveltemplate .= html_writer::tag('div', $button, array('class' => 'delete'));

        }

        $leveltemplate .= html_writer::end_tag('div'); // .level-wrapper

        $leveltemplate = html_writer::tag('td', $leveltemplate, $tdattributes); // The .level cell.

        $leveltemplate = str_replace('{NAME}', $elementname, $leveltemplate);

        $leveltemplate = str_replace('{CRITERION-id}', $criterionid, $leveltemplate);

        $leveltemplate = str_replace('{LEVEL-id}', $level['id'], $leveltemplate);

        return $leveltemplate;

    }

    /**

     * This function returns html code for displaying rubric template (content before and after

     * criteria list). Depending on $mode it may be the code to edit rubric, to preview the rubric,

     * to evaluate somebody or to review the evaluation.

     *

     * This function is called from display_rubric() to display the whole rubric.

     *

     * When overriding this function it is very important to remember that all elements of html

     * form (in edit or evaluate mode) must have the name $elementname.

     *

     * Also JavaScript relies on the class names of elements and when developer changes them

     * script might stop working.

     *

     * @param int $mode rubric display mode see {@link gradingform_rubric_controller}

     * @param array $options display options for this rubric, defaults are: {@link gradingform_rubric_controller::get_default_options()}

     * @param string $elementname the name of the form element (in editor mode) or the prefix for div ids (in view mode)

     * @param string $criteriastr evaluated templates for this rubric's criteria

     * @return string

     */

    protected function rubric_template($mode, $options, $elementname, $criteriastr) {

        $classsuffix = ''; // CSS suffix for class of the main div. Depends on the mode

        switch ($mode) {

            case gradingform_rubric_controller::DISPLAY_EDIT_FULL:

                $classsuffix = ' editor editable'; break;

            case gradingform_rubric_controller::DISPLAY_EDIT_FROZEN:

                $classsuffix = ' editor frozen';  break;

            case gradingform_rubric_controller::DISPLAY_PREVIEW:

            case gradingform_rubric_controller::DISPLAY_PREVIEW_GRADED:

                $classsuffix = ' editor preview';  break;

            case gradingform_rubric_controller::DISPLAY_EVAL:

                $classsuffix = ' evaluate editable'; break;

            case gradingform_rubric_controller::DISPLAY_EVAL_FROZEN:

                $classsuffix = ' evaluate frozen';  break;

            case gradingform_rubric_controller::DISPLAY_REVIEW:

                $classsuffix = ' review';  break;

            case gradingform_rubric_controller::DISPLAY_VIEW:

                $classsuffix = ' view';  break;

        }

        $rubrictemplate = html_writer::start_tag('div', array('id' => 'rubric-{NAME}', 'class' => 'clearfix gradingform_rubric'.$classsuffix));

        // Rubric table.

        $rubrictableparams = [

            'class' => 'criteria',

            'id' => '{NAME}-criteria',

        ];

        $caption = html_writer::tag('caption', get_string('rubric', 'gradingform_rubric'), ['class' => 'visually-hidden']);

        $rubrictable = html_writer::tag('table', $caption . $criteriastr, $rubrictableparams);

        $rubrictemplate .= $rubrictable;

        if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FULL) {

            $value = get_string('addcriterion', 'gradingform_rubric');

            $criteriainputparams = array(

                'type' => 'submit',

                'name' => '{NAME}[criteria][addcriterion]',

                'id' => '{NAME}-criteria-addcriterion',

                'value' => $value

            );

            $input = html_writer::empty_tag('input', $criteriainputparams);

            $rubrictemplate .= html_writer::tag('div', $input, array('class' => 'addcriterion btn btn-secondary'));

        }

        $rubrictemplate .= $this->rubric_edit_options($mode, $options);

        $rubrictemplate .= html_writer::end_tag('div');

        return str_replace('{NAME}', $elementname, $rubrictemplate);

    }

    /**

     * Generates html template to view/edit the rubric options. Expression {NAME} is used in

     * template for the form element name

     *

     * @param int $mode rubric display mode see {@link gradingform_rubric_controller}

     * @param array $options display options for this rubric, defaults are: {@link gradingform_rubric_controller::get_default_options()}

     * @return string

     */

    protected function rubric_edit_options($mode, $options) {

        if ($mode != gradingform_rubric_controller::DISPLAY_EDIT_FULL

                && $mode != gradingform_rubric_controller::DISPLAY_EDIT_FROZEN

                && $mode != gradingform_rubric_controller::DISPLAY_PREVIEW) {

            // Options are displayed only for people who can manage

            return;

        }

        $html = html_writer::start_tag('div', array('class' => 'options'));

        $html .= html_writer::tag('div', get_string('rubricoptions', 'gradingform_rubric'), array('class' => 'optionsheading'));

        $attrs = array('type' => 'hidden', 'name' => '{NAME}[options][optionsset]', 'value' => 1);

        foreach ($options as $option => $value) {

            $html .= html_writer::start_tag('div', array('class' => 'option '.$option));

            $attrs = array('name' => '{NAME}[options]['.$option.']', 'id' => '{NAME}-options-'.$option);

            switch ($option) {

                case 'sortlevelsasc':

                    // Display option as dropdown

                    $html .= html_writer::label(get_string($option, 'gradingform_rubric'), $attrs['id'], false);

                    $value = (int)(!!$value); // make sure $value is either 0 or 1

                    if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FULL) {

                        $selectoptions = array(0 => get_string($option.'0', 'gradingform_rubric'), 1 => get_string($option.'1', 'gradingform_rubric'));

                        $valuestr = html_writer::select($selectoptions, $attrs['name'], $value, false, array('id' => $attrs['id']));

                        $html .= html_writer::tag('span', $valuestr, array('class' => 'value'));

                    } else {

                        $html .= html_writer::tag('span', get_string($option.$value, 'gradingform_rubric'), array('class' => 'value'));

                        if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FROZEN) {

                            $html .= html_writer::empty_tag('input', $attrs + array('type' => 'hidden', 'value' => $value));

                        }

                    }

                    break;

                default:

                    if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FROZEN && $value) {

                        // Id should be different then the actual input added later.

                        $attrs['id'] .= '_hidden';

                        $html .= html_writer::empty_tag('input', $attrs + array('type' => 'hidden', 'value' => $value));

                    }

                    // Display option as checkbox

                    $attrs['type'] = 'checkbox';

                    $attrs['value'] = 1;

                    if ($value) {

                        $attrs['checked'] = 'checked';

                    }

                    if ($mode == gradingform_rubric_controller::DISPLAY_EDIT_FROZEN || $mode == gradingform_rubric_controller::DISPLAY_PREVIEW) {

                        $attrs['disabled'] = 'disabled';

                        unset($attrs['name']);

                        // Id should be different then the actual input added later.

                        $attrs['id'] .= '_disabled';

                    }

                    $html .= html_writer::empty_tag('input', $attrs);

                    $html .= html_writer::tag('label', get_string($option, 'gradingform_rubric'), array('for' => $attrs['id']));

                    break;

            }

            if (get_string_manager()->string_exists($option.'_help', 'gradingform_rubric')) {

                $html .= $this->help_icon($option, 'gradingform_rubric');

            }

            $html .= html_writer::end_tag('div'); // .option

        }

        $html .= html_writer::end_tag('div'); // .options

        return $html;

    }

    /**

     * This function returns html code for displaying rubric. Depending on $mode it may be the code

     * to edit rubric, to preview the rubric, to evaluate somebody or to review the evaluation.

     *

     * It is very unlikely that this function needs to be overriden by theme. It does not produce

     * any html code, it just prepares data about rubric design and evaluation, adds the CSS

     * class to elements and calls the functions level_template, criterion_template and

     * rubric_template

     *

     * @param array $criteria data about the rubric design

     * @param array $options display options for this rubric, defaults are: {@link gradingform_rubric_controller::get_default_options()}

     * @param int $mode rubric display mode, see {@link gradingform_rubric_controller}

     * @param string $elementname the name of the form element (in editor mode) or the prefix for div ids (in view mode)

     * @param array $values evaluation result

     * @return string

     */

    public function display_rubric($criteria, $options, $mode, $elementname = null, $values = null) {

        $criteriastr = '';

        $cnt = 0;

        foreach ($criteria as $id => $criterion) {

            $criterion['class'] = $this->get_css_class_suffix($cnt++, sizeof($criteria) -1);

            $criterion['id'] = $id;

            $levelsstr = '';

            $levelcnt = 0;

            if (isset($values['criteria'][$id])) {

                $criterionvalue = $values['criteria'][$id];

            } else {

                $criterionvalue = null;

            }

            $index = 1;

            foreach ($criterion['levels'] as $levelid => $level) {

                $level['id'] = $levelid;

                $level['class'] = $this->get_css_class_suffix($levelcnt++, sizeof($criterion['levels']) -1);

                $level['checked'] = (isset($criterionvalue['levelid']) && ((int)$criterionvalue['levelid'] === $levelid));

                if ($level['checked'] && ($mode == gradingform_rubric_controller::DISPLAY_EVAL_FROZEN || $mode == gradingform_rubric_controller::DISPLAY_REVIEW || $mode == gradingform_rubric_controller::DISPLAY_VIEW)) {

                    $level['class'] .= ' checked';

                    //in mode DISPLAY_EVAL the class 'checked' will be added by JS if it is enabled. If JS is not enabled, the 'checked' class will only confuse

                }

                if (isset($criterionvalue['savedlevelid']) && ((int)$criterionvalue['savedlevelid'] === $levelid)) {

                    $level['class'] .= ' currentchecked';

                }

                $level['tdwidth'] = 100/count($criterion['levels']);

                $level['index'] = $index;

                $levelsstr .= $this->level_template($mode, $options, $elementname, $id, $level);

                $index++;

            }

            $criteriastr .= $this->criterion_template($mode, $options, $elementname, $criterion, $levelsstr, $criterionvalue);

        }

        return $this->rubric_template($mode, $options, $elementname, $criteriastr);

    }

    /**

     * Help function to return CSS class names for element (first/last/even/odd) with leading space

     *

     * @param int $idx index of this element in the row/column

     * @param int $maxidx maximum index of the element in the row/column

     * @return string

     */

    protected function get_css_class_suffix($idx, $maxidx) {

        $class = '';

        if ($idx == 0) {

            $class .= ' first';

        }

        if ($idx == $maxidx) {

            $class .= ' last';

        }

        if ($idx%2) {

            $class .= ' odd';

        } else {

            $class .= ' even';

        }

        return $class;

    }

    /**

     * Displays for the student the list of instances or default content if no instances found

     *

     * @param array $instances array of objects of type gradingform_rubric_instance

     * @param string $defaultcontent default string that would be displayed without advanced grading

     * @param boolean $cangrade whether current user has capability to grade in this context

     * @return string

     */

    public function display_instances($instances, $defaultcontent, $cangrade) {

        $return = '';

        if (sizeof($instances)) {

            $return .= html_writer::start_tag('div', array('class' => 'advancedgrade'));

            $idx = 0;

            foreach ($instances as $instance) {

                $return .= $this->display_instance($instance, $idx++, $cangrade);

            }

            $return .= html_writer::end_tag('div');

        }

        return $return. $defaultcontent;

    }

    /**

     * Displays one grading instance

     *

     * @param gradingform_rubric_instance $instance

     * @param int $idx unique number of instance on page

     * @param bool $cangrade whether current user has capability to grade in this context

     */

    public function display_instance(gradingform_rubric_instance $instance, $idx, $cangrade) {

        $criteria = $instance->get_controller()->get_definition()->rubric_criteria;

        $options = $instance->get_controller()->get_options();

        $values = $instance->get_rubric_filling();

        if ($cangrade) {

            $mode = gradingform_rubric_controller::DISPLAY_REVIEW;

            $showdescription = $options['showdescriptionteacher'];

        } else {

            $mode = gradingform_rubric_controller::DISPLAY_VIEW;

            $showdescription = $options['showdescriptionstudent'];

        }

        $output = '';

        if ($showdescription) {

            $output .= $this->box($instance->get_controller()->get_formatted_description(), 'gradingform_rubric-description');

        }

        $output .= $this->display_rubric($criteria, $options, $mode, 'rubric'.$idx, $values);

        return $output;

    }

    /**

     * Displays confirmation that students require re-grading

     *

     * @param string $elementname

     * @param int $changelevel

     * @param string $value

     * @return string

     */

    public function display_regrade_confirmation($elementname, $changelevel, $value) {

        $html = html_writer::start_tag('div', array('class' => 'gradingform_rubric-regrade', 'role' => 'alert'));

        if ($changelevel<=2) {

            $html .= html_writer::label(get_string('regrademessage1', 'gradingform_rubric'), 'menu' . $elementname . 'regrade');

            $selectoptions = array(

                1 => get_string('regradeoption1', 'gradingform_rubric')

            );

            $html .= html_writer::select($selectoptions, $elementname.'[regrade]', $value, false);

        } else {

            $html .= get_string('regrademessage5', 'gradingform_rubric');

            $html .= html_writer::empty_tag('input', array('name' => $elementname.'[regrade]', 'value' => 1, 'type' => 'hidden'));

        }

        $html .= html_writer::end_tag('div');

        return $html;

    }

    /**

     * Generates and returns HTML code to display information box about how rubric score is converted to the grade

     *

     * @param array $scores

     * @return string

     */

    public function display_rubric_mapping_explained($scores) {

        $html = '';

        if (!$scores) {

            return $html;

        }

        if ($scores['minscore'] <> 0) {

            $html .= $this->output->notification(get_string('zerolevelsabsent', 'gradingform_rubric'), 'error');

        }

        $html .= $this->output->notification(get_string('rubricmappingexplained', 'gradingform_rubric', (object)$scores), 'info');

        return $html;

    }

}