theme/index.php

   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  * This page provides the Administration -> ... -> Theme selector UI.
  19  *
  20  * @package core
  21  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  22  */
  23
  24 require_once(__DIR__ . '/../config.php');
  25 require_once($CFG->libdir . '/adminlib.php');
  26
  27 $choose = optional_param('choose', '', PARAM_PLUGIN);
  28 $reset  = optional_param('reset', 0, PARAM_BOOL);
  29 $confirmation = optional_param('confirmation', 0, PARAM_BOOL);
  30
  31 admin_externalpage_setup('themeselector');
  32
  33 unset($SESSION->theme);
  34
  35 $PAGE->set_primary_active_tab('siteadminnode');
  36 $PAGE->navbar->add(get_string('themeselector', 'admin'), $PAGE->url);
  37
  38 // Clear theme cache.
  39 if ($reset and confirm_sesskey()) {
  40     theme_reset_all_caches();
  41 }
  42
  43 // Change theme.
  44 if (!empty($choose) && confirm_sesskey()) {
  45
  46     // Load the theme to make sure it is valid.
  47     $theme = theme_config::load($choose);
  48
  49     if ($theme instanceof \theme_config) {
  50         set_config('theme', $theme->name);
  51         $notifytype = 'success';
  52         $notifymessage = get_string('themesaved');
  53     } else {
  54         $notifytype = 'error';
  55         $notifymessage = get_string('error');
  56     }
  57
  58     // Redirect with notification.
  59     redirect(new moodle_url('/theme/index.php'), $notifymessage, null, $notifytype);
  60 }
  61
  62 $table = new html_table();
  63 $table->data = [];
  64 $table->id = 'adminthemeselector';
  65 $table->head = [get_string('theme'), get_string('info')];
  66 $table->align = ['left', 'left'];
  67
  68 $themes = core_component::get_plugin_list('theme');
  69
  70 // Loop through available themes.
  71 foreach ($themes as $themename => $themedir) {
  72
  73     try {
  74         $theme = theme_config::load($themename);
  75     } catch (Exception $e) {
  76         // Bad theme, just skip it for now.
  77         continue;
  78     }
  79     if ($themename !== $theme->name) {
  80         // Obsoleted or broken theme, just skip for now.
  81         continue;
  82     }
  83     if (empty($CFG->themedesignermode) && $theme->hidefromselector) {
  84         // The theme doesn't want to be shown in the theme selector and as theme
  85         // designer mode is switched off we will respect that decision.
  86         continue;
  87     }
  88
  89     // Build the table rows.
  90     $row = [];
  91     $rowclasses = [];
  92     $strthemename = get_string('pluginname', 'theme_'.$themename);
  93
  94     // Screenshot/preview cell.
  95     $screenshotpath = new moodle_url('/theme/image.php', ['theme' => $themename, 'image' => 'screenshot', 'component' => 'theme']);
  96     $row[] = html_writer::empty_tag('img', ['class' => 'img-fluid', 'src' => $screenshotpath, 'alt' => $strthemename]);
  97
  98     // Info cell.
  99     $infocell = $OUTPUT->heading($strthemename, 3);
 100
 101     // Is this the current theme?
 102     if ($themename == $CFG->theme) {
 103         $rowclasses[] = 'selectedtheme';
 104     } else {
 105         // Button to choose this as the main theme.
 106         $setthemestr = get_string('usetheme');
 107         $setthemeurl = new moodle_url('/theme/index.php', ['choose' => $themename, 'sesskey' => sesskey()]);
 108         $setthemebutton = new single_button($setthemeurl, $setthemestr, 'post');
 109         $infocell .= html_writer::div($OUTPUT->render($setthemebutton), 'mt-2');
 110     }
 111     $row[] = $infocell;
 112
 113     $table->data[$themename] = $row;
 114     $table->rowclasses[$themename] = join(' ', $rowclasses);
 115     $table->responsive = false;
 116 }
 117
 118 // Show heading.
 119 echo $OUTPUT->header();
 120 echo $OUTPUT->heading(get_string('themeselector', 'admin'));
 121
 122 // Reset theme caches button.
 123 $reseturl = new moodle_url('index.php', ['sesskey' => sesskey(), 'reset' => 1]);
 124 echo $OUTPUT->single_button($reseturl, get_string('themeresetcaches', 'admin'), 'post');
 125
 126 // Render main table.
 127 echo html_writer::table($table);
 128 echo $OUTPUT->footer();