/**
 * Get the names of all the filters installed in this Moodle.
 *
 * @global object
 * @return array path => filter name from the appropriate lang file. e.g.
 * array('mod/glossary' => 'Glossary Auto-linking', 'filter/tex' => 'TeX Notation');
 * sorted in alphabetical order of name.
 */
function filter_get_all_installed()
{
    global $CFG;
    $filternames = array();
    // TODO: deprecated since 2.2, will be out in 2.3, see MDL-29996
    $filterlocations = array('mod', 'filter');
    foreach ($filterlocations as $filterlocation) {
        // TODO: move get_list_of_plugins() to get_plugin_list()
        $filters = get_list_of_plugins($filterlocation);
        foreach ($filters as $filter) {
            // MDL-29994 - Ignore mod/data and mod/glossary filters forever, this will be out in 2.3
            if ($filterlocation == 'mod' && ($filter == 'data' || $filter == 'glossary')) {
                continue;
            }
            $path = $filterlocation . '/' . $filter;
            if (is_readable($CFG->dirroot . '/' . $path . '/filter.php')) {
                $strfiltername = filter_get_name($path);
                $filternames[$path] = $strfiltername;
            }
        }
    }
    collatorlib::asort($filternames);
    return $filternames;
}

/**
 * Get the names of all the filters installed in this Moodle.
 *
 * @return array path => filter name from the appropriate lang file. e.g.
 * array('tex' => 'TeX Notation');
 * sorted in alphabetical order of name.
 */
function filter_get_all_installed()
{
    global $CFG;
    $filternames = array();
    foreach (core_component::get_plugin_list('filter') as $filter => $fulldir) {
        if (is_readable("{$fulldir}/filter.php")) {
            $filternames[$filter] = filter_get_name($filter);
        }
    }
    core_collator::asort($filternames);
    return $filternames;
}

/**
 * Returns the language string for the given plugin.
 *
 * @param string $plugin the plugin code name
 * @param string $type the type of plugin (mod, block, filter)
 * @return string The plugin language string
 */
function get_plugin_name($plugin, $type = 'mod')
{
    $plugin_name = '';
    switch ($type) {
        case 'mod':
            $plugin_name = get_string('modulename', $plugin);
            break;
        case 'blocks':
            $plugin_name = get_string('pluginname', "block_{$plugin}");
            if (empty($plugin_name) || $plugin_name == '[[pluginname]]') {
                if (($block = block_instance($plugin)) !== false) {
                    $plugin_name = $block->get_title();
                } else {
                    $plugin_name = "[[{$plugin}]]";
                }
            }
            break;
        case 'filter':
            $plugin_name = filter_get_name('filter/' . $plugin);
            break;
        default:
            $plugin_name = $plugin;
            break;
    }
    return $plugin_name;
}

 echo html_writer::start_tag('div');
 echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'sesskey', 'value' => sesskey()));
 $table = new html_table();
 $table->head = array(get_string('filter'), get_string('isactive', 'filters'));
 $table->align = array('left', 'left');
 if ($settingscol) {
     $table->head[] = $strsettings;
     $table->align[] = 'left';
 }
 $table->width = ' ';
 $table->data = array();
 // iterate through filters adding to display table
 foreach ($availablefilters as $filter => $filterinfo) {
     $row = array();
     // Filter name.
     $row[] = filter_get_name($filter);
     // Default/on/off choice.
     if ($filterinfo->inheritedstate == TEXTFILTER_ON) {
         $activechoices[TEXTFILTER_INHERIT] = $strdefaulton;
     } else {
         $activechoices[TEXTFILTER_INHERIT] = $strdefaultoff;
     }
     $row[] = html_writer::select($activechoices, str_replace('/', '_', $filter), $filterinfo->localstate, false);
     // Settings link, if required
     if ($settingscol) {
         $settings = '';
         if ($filterinfo->hassettings) {
             $settings = '<a href="' . $baseurl->out(true, array('filter' => $filter)) . '">' . $strsettings . '</a>';
         }
         $row[] = $settings;
     }

 public function load_choices()
 {
     if (is_array($this->choices)) {
         return true;
     }
     $this->choices = array();
     foreach (core_component::get_plugin_list('filter') as $plugin => $unused) {
         $this->choices[$plugin] = filter_get_name($plugin);
     }
     return true;
 }

     break;
 case 'down':
     if (isset($filters[$filterpath])) {
         filter_set_global_state($filterpath, $filters[$filterpath]->active, 1);
     }
     break;
 case 'up':
     if (isset($filters[$filterpath])) {
         $oldpos = $filters[$filterpath]->sortorder;
         filter_set_global_state($filterpath, $filters[$filterpath]->active, -1);
     }
     break;
 case 'delete':
     // If not yet confirmed, display a confirmation message.
     if (!optional_param('confirm', '', PARAM_BOOL)) {
         $filtername = filter_get_name($filterpath);
         $title = get_string('deletefilterareyousure', 'admin', $filtername);
         echo $OUTPUT->header();
         echo $OUTPUT->heading($title);
         $linkcontinue = new moodle_url($returnurl, array('action' => 'delete', 'filterpath' => $filterpath, 'confirm' => 1));
         $formcancel = new single_button(new moodle_url($returnurl), get_string('no'), 'get');
         echo $OUTPUT->confirm(get_string('deletefilterareyousuremessage', 'admin', $filtername), $linkcontinue, $formcancel);
         echo $OUTPUT->footer();
         exit;
     }
     // Do the deletion.
     $title = get_string('deletingfilter', 'admin', $filterpath);
     echo $OUTPUT->header();
     echo $OUTPUT->heading($title);
     // Delete all data for this plugin.
     filter_delete_all_for_filter($filterpath);

/**
 * Get the names of all the filters installed in this Moodle.
 *
 * @global object
 * @return array path => filter name from the appropriate lang file. e.g.
 * array('mod/glossary' => 'Glossary Auto-linking', 'filter/tex' => 'TeX Notation');
 * sorted in alphabetical order of name.
 */
function filter_get_all_installed()
{
    global $CFG;
    $filternames = array();
    $filterlocations = array('mod', 'filter');
    foreach ($filterlocations as $filterlocation) {
        $filters = get_list_of_plugins($filterlocation);
        foreach ($filters as $filter) {
            $path = $filterlocation . '/' . $filter;
            if (is_readable($CFG->dirroot . '/' . $path . '/filter.php')) {
                $strfiltername = filter_get_name($path);
                $filternames[$path] = $strfiltername;
            }
        }
    }
    textlib_get_instance()->asort($filternames);
    return $filternames;
}

/**
 * Get the names of all the filters installed in this Moodle.
 *
 * @return array path => filter name from the appropriate lang file. e.g.
 * array('tex' => 'TeX Notation');
 * sorted in alphabetical order of name.
 */
function filter_get_all_installed()
{
    global $CFG;
    $filternames = array();
    foreach (get_list_of_plugins('filter') as $filter) {
        if (is_readable("{$CFG->dirroot}/filter/{$filter}/filter.php")) {
            $filternames[$filter] = filter_get_name($filter);
        }
    }
    collatorlib::asort($filternames);
    return $filternames;
}

//.........这里部分代码省略.........
            $strman = get_string_manager();
            if ($strman->string_exists('activitycompletion', 'completion')) {
                // Moodle >= 2.7
                $name = get_string('activitycompletion', 'completion');
            } else {
                // Moodle <= 2.6
                $name = get_string('completioncondition', 'condition');
            }
            foreach ($value as $i => $v) {
                $str = array();
                if ($v->ungraded) {
                    $str[] = get_string('conditioncmungraded', $plugin);
                }
                if ($v->resources) {
                    $str[] = get_string('conditioncmresources', $plugin);
                }
                if ($v->labels) {
                    $str[] = get_string('conditioncmlabels', $plugin);
                }
                if ($str = implode(', ', $str)) {
                    $str = block_taskchain_navigation::textlib('strtolower', " ({$str})");
                }
                $value[$i] = html_writer::tag('p', $conditioncmidmenu[$v->cm] . "{$str} " . $conditioncmcompletionmenu[$v->e]);
            }
            $value = implode('', $value);
            break;
        case 'conditioncmlabels':
        case 'conditioncmresources':
        case 'conditioncmungraded':
            $name = get_string($name, $plugin);
            $value = format_yesno($value);
            break;
        case 'removecompletion':
        case 'erasecompletion':
            $name = get_string($name, $plugin);
            $value = format_yesno($value);
            break;
        case 'completiontracking':
            $name = get_string('completion', 'completion');
            $value = $completiontrackingmenu[$value];
            break;
        case 'completiondate':
            $name = get_string('completionexpected', 'completion');
            $value = $value ? userdate($value) : get_string('disable');
            break;
        case 'competencyrule':
            $name = get_string('uponcoursemodulecompletion', 'tool_lp');
            $value = $competencyrulemenu[$value];
            break;
        default:
            if (array_key_exists($name, $completionfields)) {
                $field = $completionfields[$name];
                $name = $field->text;
                switch ($field->type) {
                    case 'checkbox':
                        $value = format_yesno($value);
                        break;
                    case 'duration':
                        list($value, $unit) = convert_seconds_to_duration($value);
                        $value .= ' ' . get_duration_units($unit);
                        break;
                    case 'select':
                        $i = 1;
                        $num = $value;
                        $value = array();
                        while (($ii = pow(2, $i)) && $ii <= $num) {
                            if ($ii & $num) {
                                $value[] = strip_tags($field->options[$ii]);
                            }
                            $i++;
                        }
                        $value = array_filter($value);
                        $value = implode(', ', $value);
                        break;
                    case 'textbox':
                        $value = number_format($value);
                        break;
                }
            } else {
                if (substr($name, 0, 6) == 'filter') {
                    $name = substr($name, 6);
                    switch ($value) {
                        case TEXTFILTER_ON:
                        case TEXTFILTER_OFF:
                            $value = $filtermenu[$value];
                            break;
                        case TEXTFILTER_INHERIT:
                            if ($filters[$name]->inheritedstate == TEXTFILTER_ON) {
                                $value = $filterdefaulton;
                            } else {
                                $value = $filterdefaultoff;
                            }
                            break;
                    }
                    $name = filter_get_name($name);
                }
            }
    }
    return array($name, $value);
}