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<?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/>.
/**
* This page provides the Administration -> ... -> Theme selector UI.
*
* @package core
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(__DIR__ . '/../config.php');
require_once($CFG->libdir . '/adminlib.php');
$choose = optional_param('choose', '', PARAM_PLUGIN);
$reset = optional_param('reset', 0, PARAM_BOOL);
$device = optional_param('device', '', PARAM_TEXT);
$unsettheme = optional_param('unsettheme', 0, PARAM_BOOL);
$confirmation = optional_param('confirmation', 0, PARAM_BOOL);
admin_externalpage_setup('themeselector');
if (!empty($device)) {
// Make sure the device requested is valid.
$devices = core_useragent::get_device_type_list();
if (!in_array($device, $devices)) {
// The provided device isn't a valid device throw an error.
print_error('invaliddevicetype');
}
}
unset($SESSION->theme);
if ($reset and confirm_sesskey()) {
theme_reset_all_caches();
} else if ($choose && $confirmation) {
$theme = theme_config::load($choose);
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('themesaved'));
echo $OUTPUT->box_start();
echo format_text(get_string('choosereadme', 'theme_'.$theme->name), FORMAT_MOODLE);
echo $OUTPUT->box_end();
echo $OUTPUT->continue_button($CFG->wwwroot . '/theme/index.php');
echo $OUTPUT->footer();
exit;
} else if ($choose && $device && !theme_is_device_locked($device) && !$unsettheme && confirm_sesskey()) {
// Load the theme to make sure it is valid.
$theme = theme_config::load($choose);
// Get the config argument for the chosen device.
$themename = core_useragent::get_device_type_cfg_var_name($device);
set_config($themename, $theme->name);
$urlconfirm = new moodle_url('/theme/index.php', array('confirmation' => 1, 'choose' => $choose));
redirect($urlconfirm);
} else if ($device && !theme_is_device_locked($device) && $unsettheme && confirm_sesskey() && ($device != 'default')) {
// Unset the theme and continue.
unset_config(core_useragent::get_device_type_cfg_var_name($device));
$device = '';
}
// Otherwise, show either a list of devices, or is enabledevicedetection set to no or a
// device is specified show a list of themes.
$table = new html_table();
$table->data = array();
$heading = '';
if (!empty($CFG->enabledevicedetection) && empty($device)) {
$heading = get_string('selectdevice', 'admin');
// Display a list of devices that a user can select a theme for.
$strthemenotselected = get_string('themenoselected', 'admin');
$strthemeselect = get_string('themeselect', 'admin');
// Display the device selection screen.
$table->id = 'admindeviceselector';
$table->head = array(get_string('devicetype', 'admin'), get_string('currenttheme', 'admin'), get_string('info'));
$devices = core_useragent::get_device_type_list();
foreach ($devices as $thedevice) {
$headingthemename = ''; // To output the picked theme name when needed.
$themename = core_useragent::get_device_type_theme($thedevice);
if (!$themename && $thedevice == 'default') {
$themename = theme_config::DEFAULT_THEME;
}
$themelocked = theme_is_device_locked($thedevice);
$screenshotcell = $strthemenotselected;
$unsetthemebutton = '';
if ($themename) {
// Check the theme exists.
$themename = clean_param($themename, PARAM_THEME);
if (empty($themename)) {
// Likely the theme has been deleted.
unset_config(core_useragent::get_device_type_cfg_var_name($thedevice));
} else {
$strthemename = get_string('pluginname', 'theme_'.$themename);
// Link to the screenshot, now mandatory - the image path is hardcoded because we need image from other themes,
// not the current one.
$screenshoturl = new moodle_url('/theme/image.php',
array('theme' => $themename, 'image' => 'screenshot', 'component' => 'theme'));
// Contents of the screenshot/preview cell.
$screenshotcell = html_writer::empty_tag('img', array('class' => 'img-responsive img-fluid',
'src' => $screenshoturl, 'alt' => $strthemename));
// Show the name of the picked theme.
$headingthemename = $OUTPUT->heading($strthemename, 3);
}
// If not default device then show option to unset theme.
if ($thedevice != 'default' && !$themelocked) {
$unsetthemestr = get_string('unsettheme', 'admin');
$unsetthemeurl = new moodle_url('/theme/index.php',
array('device' => $thedevice, 'sesskey' => sesskey(), 'unsettheme' => true));
$unsetthemebutton = new single_button($unsetthemeurl, $unsetthemestr, 'get');
$unsetthemebutton = $OUTPUT->render($unsetthemebutton);
}
}
$deviceurl = new moodle_url('/theme/index.php', array('device' => $thedevice, 'sesskey' => sesskey()));
$select = '';
if (!$themelocked) {
$select = $OUTPUT->render(new single_button($deviceurl, $strthemeselect, 'get'));
}
$lockwarning = '';
if ($themelocked) {
$lockwarning = html_writer::div(get_string('configoverride', 'admin'), 'alert alert-info');
}
$table->data[] = array(
$OUTPUT->heading(ucfirst($thedevice), 3),
$screenshotcell,
$headingthemename . $lockwarning . $select . $unsetthemebutton
);
}
} else {
// Either a device has been selected of $CFG->enabledevicedetection is off so display a list
// of themes to select.
$heading = get_string('selecttheme', 'admin', $device);
if (empty($device)) {
// If $CFG->enabledevicedetection is off this will return 'default'.
$device = core_useragent::get_device_type();
}
$themelocked = theme_is_device_locked($device);
$table->id = 'adminthemeselector';
$table->head = array(get_string('theme'), get_string('info'));
$themes = array();
if ($themelocked) {
$heading = get_string('currenttheme', 'admin');
$themename = theme_get_locked_theme_for_device($device);
$themedirectory = core_component::get_plugin_directory('theme', $themename);
$themes[$themename] = $themedirectory;
} else {
$themes = core_component::get_plugin_list('theme');
}
foreach ($themes as $themename => $themedir) {
// Load the theme config.
try {
$theme = theme_config::load($themename);
} catch (Exception $e) {
// Bad theme, just skip it for now.
continue;
}
if ($themename !== $theme->name) {
// Obsoleted or broken theme, just skip for now.
continue;
}
if (empty($CFG->themedesignermode) && $theme->hidefromselector) {
// The theme doesn't want to be shown in the theme selector and as theme
// designer mode is switched off we will respect that decision.
continue;
}
$strthemename = get_string('pluginname', 'theme_'.$themename);
// Build the table row, and also a list of items to go in the second cell.
$row = array();
$infoitems = array();
$rowclasses = array();
// Set up bools whether this theme is chosen either main or legacy.
$ischosentheme = ($themename == core_useragent::get_device_type_theme($device));
if ($ischosentheme) {
// Is the chosen main theme.
$rowclasses[] = 'selectedtheme';
}
// Link to the screenshot, now mandatory - the image path is hardcoded because we need image from other themes,
// not the current one.
$screenshotpath = new moodle_url('/theme/image.php',
array('theme' => $themename, 'image' => 'screenshot', 'component' => 'theme'));
// Contents of the first screenshot/preview cell.
$row[] = html_writer::empty_tag('img', array('class' => 'img-responsive img-fluid',
'src' => $screenshotpath, 'alt' => $strthemename));
// Contents of the second cell.
$infocell = $OUTPUT->heading($strthemename, 3);
if ($themelocked) {
$infocell .= html_writer::div(get_string('configoverride', 'admin'), 'alert alert-info');
}
// Button to choose this as the main theme or unset this theme for devices other then default.
if (!$themelocked) {
if (($ischosentheme) && ($device != 'default')) {
$unsetthemestr = get_string('unsettheme', 'admin');
$unsetthemeurl = new moodle_url('/theme/index.php',
array('device' => $device, 'unsettheme' => true, 'sesskey' => sesskey()));
$unsetbutton = new single_button($unsetthemeurl, $unsetthemestr, 'get');
$infocell .= $OUTPUT->render($unsetbutton);
} else if ((!$ischosentheme)) {
$setthemestr = get_string('usetheme');
$setthemeurl = new moodle_url('/theme/index.php',
array('device' => $device, 'choose' => $themename, 'sesskey' => sesskey()));
$setthemebutton = new single_button($setthemeurl, $setthemestr, 'get');
$infocell .= $OUTPUT->render($setthemebutton);
}
}
$row[] = $infocell;
$table->data[$themename] = $row;
$table->rowclasses[$themename] = join(' ', $rowclasses);
}
}
echo $OUTPUT->header('themeselector');
echo $OUTPUT->heading($heading);
$params = array('sesskey' => sesskey(), 'reset' => 1);
if (!empty($device)) {
$params['device'] = $device;
}
echo $OUTPUT->single_button(new moodle_url('index.php', $params), get_string('themeresetcaches', 'admin'));
echo html_writer::table($table);
echo $OUTPUT->footer();