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