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 $device = optional_param('device', '', PARAM_TEXT);
  30 $unsettheme = optional_param('unsettheme', 0, PARAM_BOOL);
  31 $confirmation = optional_param('confirmation', 0, PARAM_BOOL);
  32
  33 admin_externalpage_setup('themeselector');
  34
  35 if (!empty($device)) {
  36     // Make sure the device requested is valid.
  37     $devices = core_useragent::get_device_type_list();
  38     if (!in_array($device, $devices)) {
  39         // The provided device isn't a valid device throw an error.
  40         print_error('invaliddevicetype');
  41     }
  42 }
  43
  44 unset($SESSION->theme);
  45
  46 if ($reset and confirm_sesskey()) {
  47     theme_reset_all_caches();
  48 } else if ($choose && $confirmation) {
  49
  50     $theme = theme_config::load($choose);
  51     echo $OUTPUT->header();
  52     echo $OUTPUT->heading(get_string('themesaved'));
  53     echo $OUTPUT->box_start();
  54     echo format_text(get_string('choosereadme', 'theme_'.$theme->name), FORMAT_MOODLE);
  55     echo $OUTPUT->box_end();
  56     echo $OUTPUT->continue_button($CFG->wwwroot . '/theme/index.php');
  57     echo $OUTPUT->footer();
  58     exit;
  59
  60 } else if ($choose && $device && !theme_is_device_locked($device) && !$unsettheme && confirm_sesskey()) {
  61     // Load the theme to make sure it is valid.
  62     $theme = theme_config::load($choose);
  63
  64     // Get the config argument for the chosen device.
  65     $themename = core_useragent::get_device_type_cfg_var_name($device);
  66     set_config($themename, $theme->name);
  67
  68     $urlconfirm = new moodle_url('/theme/index.php', array('confirmation' => 1, 'choose' => $choose));
  69     redirect($urlconfirm);
  70 } else if ($device && !theme_is_device_locked($device) && $unsettheme && confirm_sesskey() && ($device != 'default')) {
  71     // Unset the theme and continue.
  72     unset_config(core_useragent::get_device_type_cfg_var_name($device));
  73     $device = '';
  74 }
  75
  76 // Otherwise, show either a list of devices, or is enabledevicedetection set to no or a
  77 // device is specified show a list of themes.
  78
  79 $table = new html_table();
  80 $table->data = array();
  81 $heading = '';
  82 if (!empty($CFG->enabledevicedetection) && empty($device)) {
  83     $heading = get_string('selectdevice', 'admin');
  84     // Display a list of devices that a user can select a theme for.
  85
  86     $strthemenotselected = get_string('themenoselected', 'admin');
  87     $strthemeselect = get_string('themeselect', 'admin');
  88
  89     // Display the device selection screen.
  90     $table->id = 'admindeviceselector';
  91     $table->head = array(get_string('devicetype', 'admin'), get_string('currenttheme', 'admin'), get_string('info'));
  92
  93     $devices = core_useragent::get_device_type_list();
  94     foreach ($devices as $thedevice) {
  95
  96         $headingthemename = ''; // To output the picked theme name when needed.
  97         $themename = core_useragent::get_device_type_theme($thedevice);
  98         if (!$themename && $thedevice == 'default') {
  99             $themename = theme_config::DEFAULT_THEME;
 100         }
 101         $themelocked = theme_is_device_locked($thedevice);
 102
 103         $screenshotcell = $strthemenotselected;
 104         $unsetthemebutton = '';
 105         if ($themename) {
 106             // Check the theme exists.
 107             $themename = clean_param($themename, PARAM_THEME);
 108             if (empty($themename)) {
 109                 // Likely the theme has been deleted.
 110                 unset_config(core_useragent::get_device_type_cfg_var_name($thedevice));
 111             } else {
 112                 $strthemename = get_string('pluginname', 'theme_'.$themename);
 113                 // Link to the screenshot, now mandatory - the image path is hardcoded because we need image from other themes,
 114                 // not the current one.
 115                 $screenshoturl = new moodle_url('/theme/image.php',
 116                     array('theme' => $themename, 'image' => 'screenshot', 'component' => 'theme'));
 117                 // Contents of the screenshot/preview cell.
 118                 $screenshotcell = html_writer::empty_tag('img', array('class' => 'img-responsive img-fluid',
 119                     'src' => $screenshoturl, 'alt' => $strthemename));
 120                 // Show the name of the picked theme.
 121                 $headingthemename = $OUTPUT->heading($strthemename, 3);
 122             }
 123             // If not default device then show option to unset theme.
 124             if ($thedevice != 'default' && !$themelocked) {
 125                 $unsetthemestr = get_string('unsettheme', 'admin');
 126                 $unsetthemeurl = new moodle_url('/theme/index.php',
 127                     array('device' => $thedevice, 'sesskey' => sesskey(), 'unsettheme' => true));
 128                 $unsetthemebutton = new single_button($unsetthemeurl, $unsetthemestr, 'get');
 129                 $unsetthemebutton = $OUTPUT->render($unsetthemebutton);
 130             }
 131         }
 132
 133         $deviceurl = new moodle_url('/theme/index.php', array('device' => $thedevice, 'sesskey' => sesskey()));
 134
 135         $select = '';
 136         if (!$themelocked) {
 137             $select = $OUTPUT->render(new single_button($deviceurl, $strthemeselect, 'get'));
 138         }
 139
 140         $lockwarning = '';
 141         if ($themelocked) {
 142             $lockwarning = html_writer::div(get_string('configoverride', 'admin'), 'alert alert-info');
 143         }
 144
 145         $table->data[] = array(
 146             $OUTPUT->heading(ucfirst($thedevice), 3),
 147             $screenshotcell,
 148             $headingthemename . $lockwarning . $select . $unsetthemebutton
 149         );
 150     }
 151 } else {
 152     // Either a device has been selected of $CFG->enabledevicedetection is off so display a list
 153     // of themes to select.
 154     $heading = get_string('selecttheme', 'admin', $device);
 155     if (empty($device)) {
 156         // If $CFG->enabledevicedetection is off this will return 'default'.
 157         $device = core_useragent::get_device_type();
 158     }
 159
 160     $themelocked = theme_is_device_locked($device);
 161     $table->id = 'adminthemeselector';
 162     $table->head = array(get_string('theme'), get_string('info'));
 163
 164     $themes = array();
 165     if ($themelocked) {
 166         $heading = get_string('currenttheme', 'admin');
 167         $themename = theme_get_locked_theme_for_device($device);
 168         $themedirectory = core_component::get_plugin_directory('theme', $themename);
 169         $themes[$themename] = $themedirectory;
 170     } else {
 171         $themes = core_component::get_plugin_list('theme');
 172     }
 173
 174     foreach ($themes as $themename => $themedir) {
 175
 176         // Load the theme config.
 177         try {
 178             $theme = theme_config::load($themename);
 179         } catch (Exception $e) {
 180             // Bad theme, just skip it for now.
 181             continue;
 182         }
 183         if ($themename !== $theme->name) {
 184             // Obsoleted or broken theme, just skip for now.
 185             continue;
 186         }
 187         if (empty($CFG->themedesignermode) && $theme->hidefromselector) {
 188             // The theme doesn't want to be shown in the theme selector and as theme
 189             // designer mode is switched off we will respect that decision.
 190             continue;
 191         }
 192         $strthemename = get_string('pluginname', 'theme_'.$themename);
 193
 194         // Build the table row, and also a list of items to go in the second cell.
 195         $row = array();
 196         $infoitems = array();
 197         $rowclasses = array();
 198
 199         // Set up bools whether this theme is chosen either main or legacy.
 200         $ischosentheme = ($themename == core_useragent::get_device_type_theme($device));
 201
 202         if ($ischosentheme) {
 203             // Is the chosen main theme.
 204             $rowclasses[] = 'selectedtheme';
 205         }
 206
 207         // Link to the screenshot, now mandatory - the image path is hardcoded because we need image from other themes,
 208         // not the current one.
 209         $screenshotpath = new moodle_url('/theme/image.php',
 210             array('theme' => $themename, 'image' => 'screenshot', 'component' => 'theme'));
 211         // Contents of the first screenshot/preview cell.
 212         $row[] = html_writer::empty_tag('img', array('class' => 'img-responsive img-fluid',
 213             'src' => $screenshotpath, 'alt' => $strthemename));
 214         // Contents of the second cell.
 215         $infocell = $OUTPUT->heading($strthemename, 3);
 216
 217         if ($themelocked) {
 218             $infocell .= html_writer::div(get_string('configoverride', 'admin'), 'alert alert-info');
 219         }
 220
 221         // Button to choose this as the main theme or unset this theme for devices other then default.
 222         if (!$themelocked) {
 223             if (($ischosentheme) && ($device != 'default')) {
 224                 $unsetthemestr = get_string('unsettheme', 'admin');
 225                 $unsetthemeurl = new moodle_url('/theme/index.php',
 226                     array('device' => $device, 'unsettheme' => true, 'sesskey' => sesskey()));
 227                 $unsetbutton = new single_button($unsetthemeurl, $unsetthemestr, 'get');
 228                 $infocell .= $OUTPUT->render($unsetbutton);
 229             } else if ((!$ischosentheme)) {
 230                 $setthemestr = get_string('usetheme');
 231                 $setthemeurl = new moodle_url('/theme/index.php',
 232                     array('device' => $device, 'choose' => $themename, 'sesskey' => sesskey()));
 233                 $setthemebutton = new single_button($setthemeurl, $setthemestr, 'get');
 234                 $infocell .= $OUTPUT->render($setthemebutton);
 235             }
 236         }
 237
 238         $row[] = $infocell;
 239
 240         $table->data[$themename] = $row;
 241         $table->rowclasses[$themename] = join(' ', $rowclasses);
 242     }
 243 }
 244 echo $OUTPUT->header('themeselector');
 245 echo $OUTPUT->heading($heading);
 246
 247 $params = array('sesskey' => sesskey(), 'reset' => 1);
 248 if (!empty($device)) {
 249     $params['device'] = $device;
 250 }
 251 echo $OUTPUT->single_button(new moodle_url('index.php', $params), get_string('themeresetcaches', 'admin'));
 252
 253 echo html_writer::table($table);
 254
 255 echo $OUTPUT->footer();