2 // This file is part of Moodle - http://moodle.org/
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.
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.
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/>.
18 * Classes for rendering HTML output for Moodle.
20 * Please see {@link http://docs.moodle.org/en/Developement:How_Moodle_outputs_HTML}
23 * Included in this file are the primary renderer classes:
24 * - renderer_base: The renderer outline class that all renderers
25 * should inherit from.
26 * - core_renderer: The standard HTML renderer.
27 * - core_renderer_cli: An adaption of the standard renderer for CLI scripts.
28 * - core_renderer_ajax: An adaption of the standard renderer for AJAX scripts.
29 * - plugin_renderer_base: A renderer class that should be extended by all
34 * @copyright 2009 Tim Hunt
35 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
38 defined('MOODLE_INTERNAL') || die();
41 * Simple base class for Moodle renderers.
43 * Tracks the xhtml_container_stack to use, which is passed in in the constructor.
45 * Also has methods to facilitate generating HTML output.
47 * @copyright 2009 Tim Hunt
48 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
55 * @var xhtml_container_stack The xhtml_container_stack to use.
57 protected $opencontainers;
60 * @var moodle_page The Moodle page the renderer has been created to assist with.
65 * @var string The requested rendering target.
72 * The constructor takes two arguments. The first is the page that the renderer
73 * has been created to assist with, and the second is the target.
74 * The target is an additional identifier that can be used to load different
75 * renderers for different options.
77 * @param moodle_page $page the page we are doing output for.
78 * @param string $target one of rendering target constants
80 public function __construct(moodle_page $page, $target) {
81 $this->opencontainers = $page->opencontainers;
83 $this->target = $target;
87 * Returns rendered widget.
89 * The provided widget needs to be an object that extends the renderable
91 * If will then be rendered by a method based upon the classname for the widget.
92 * For instance a widget of class `crazywidget` will be rendered by a protected
93 * render_crazywidget method of this renderer.
95 * @param renderable $widget instance with renderable interface
98 public function render(renderable $widget) {
99 $rendermethod = 'render_'.get_class($widget);
100 if (method_exists($this, $rendermethod)) {
101 return $this->$rendermethod($widget);
103 throw new coding_exception('Can not render widget, renderer method ('.$rendermethod.') not found.');
107 * Adds a JS action for the element with the provided id.
109 * This method adds a JS event for the provided component action to the page
110 * and then returns the id that the event has been attached to.
111 * If no id has been provided then a new ID is generated by {@link html_writer::random_id()}
113 * @param component_action $action
115 * @return string id of element, either original submitted or random new if not supplied
117 public function add_action_handler(component_action $action, $id = null) {
119 $id = html_writer::random_id($action->event);
121 $this->page->requires->event_handler("#$id", $action->event, $action->jsfunction, $action->jsfunctionargs);
126 * Returns true is output has already started, and false if not.
128 * @return boolean true if the header has been printed.
130 public function has_started() {
131 return $this->page->state >= moodle_page::STATE_IN_BODY;
135 * Given an array or space-separated list of classes, prepares and returns the HTML class attribute value
137 * @param mixed $classes Space-separated string or array of classes
138 * @return string HTML class attribute value
140 public static function prepare_classes($classes) {
141 if (is_array($classes)) {
142 return implode(' ', array_unique($classes));
148 * Return the moodle_url for an image.
150 * The exact image location and extension is determined
151 * automatically by searching for gif|png|jpg|jpeg, please
152 * note there can not be diferent images with the different
153 * extension. The imagename is for historical reasons
154 * a relative path name, it may be changed later for core
155 * images. It is recommended to not use subdirectories
156 * in plugin and theme pix directories.
158 * There are three types of images:
159 * 1/ theme images - stored in theme/mytheme/pix/,
160 * use component 'theme'
161 * 2/ core images - stored in /pix/,
162 * overridden via theme/mytheme/pix_core/
163 * 3/ plugin images - stored in mod/mymodule/pix,
164 * overridden via theme/mytheme/pix_plugins/mod/mymodule/,
165 * example: pix_url('comment', 'mod_glossary')
167 * @param string $imagename the pathname of the image
168 * @param string $component full plugin name (aka component) or 'theme'
171 public function pix_url($imagename, $component = 'moodle') {
172 return $this->page->theme->pix_url($imagename, $component);
178 * Basis for all plugin renderers.
180 * @copyright Petr Skoda (skodak)
181 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
186 class plugin_renderer_base extends renderer_base {
189 * @var renderer_base|core_renderer A reference to the current renderer.
190 * The renderer provided here will be determined by the page but will in 90%
191 * of cases by the {@link core_renderer}
196 * Constructor method, calls the parent constructor
198 * @param moodle_page $page
199 * @param string $target one of rendering target constants
201 public function __construct(moodle_page $page, $target) {
202 $this->output = $page->get_renderer('core', null, $target);
203 parent::__construct($page, $target);
207 * Renders the provided widget and returns the HTML to display it.
209 * @param renderable $widget instance with renderable interface
212 public function render(renderable $widget) {
213 $rendermethod = 'render_'.get_class($widget);
214 if (method_exists($this, $rendermethod)) {
215 return $this->$rendermethod($widget);
217 // pass to core renderer if method not found here
218 return $this->output->render($widget);
222 * Magic method used to pass calls otherwise meant for the standard renderer
223 * to it to ensure we don't go causing unnecessary grief.
225 * @param string $method
226 * @param array $arguments
229 public function __call($method, $arguments) {
230 if (method_exists('renderer_base', $method)) {
231 throw new coding_exception('Protected method called against '.get_class($this).' :: '.$method);
233 if (method_exists($this->output, $method)) {
234 return call_user_func_array(array($this->output, $method), $arguments);
236 throw new coding_exception('Unknown method called against '.get_class($this).' :: '.$method);
243 * The standard implementation of the core_renderer interface.
245 * @copyright 2009 Tim Hunt
246 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
251 class core_renderer extends renderer_base {
253 * Do NOT use, please use <?php echo $OUTPUT->main_content() ?>
254 * in layout files instead.
256 * @var string used in {@link core_renderer::header()}.
258 const MAIN_CONTENT_TOKEN = '[MAIN CONTENT GOES HERE]';
261 * @var string Used to pass information from {@link core_renderer::doctype()} to
262 * {@link core_renderer::standard_head_html()}.
264 protected $contenttype;
267 * @var string Used by {@link core_renderer::redirect_message()} method to communicate
268 * with {@link core_renderer::header()}.
270 protected $metarefreshtag = '';
273 * @var string Unique token for the closing HTML
275 protected $unique_end_html_token;
278 * @var string Unique token for performance information
280 protected $unique_performance_info_token;
283 * @var string Unique token for the main content.
285 protected $unique_main_content_token;
290 * @param moodle_page $page the page we are doing output for.
291 * @param string $target one of rendering target constants
293 public function __construct(moodle_page $page, $target) {
294 $this->opencontainers = $page->opencontainers;
296 $this->target = $target;
298 $this->unique_end_html_token = '%%ENDHTML-'.sesskey().'%%';
299 $this->unique_performance_info_token = '%%PERFORMANCEINFO-'.sesskey().'%%';
300 $this->unique_main_content_token = '[MAIN CONTENT GOES HERE - '.sesskey().']';
304 * Get the DOCTYPE declaration that should be used with this page. Designed to
305 * be called in theme layout.php files.
307 * @return string the DOCTYPE declaration (and any XML prologue) that should be used.
309 public function doctype() {
312 $doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">' . "\n";
313 $this->contenttype = 'text/html; charset=utf-8';
315 if (empty($CFG->xmlstrictheaders)) {
319 // We want to serve the page with an XML content type, to force well-formedness errors to be reported.
320 $prolog = '<?xml version="1.0" encoding="utf-8"?>' . "\n";
321 if (isset($_SERVER['HTTP_ACCEPT']) && strpos($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml') !== false) {
322 // Firefox and other browsers that can cope natively with XHTML.
323 $this->contenttype = 'application/xhtml+xml; charset=utf-8';
325 } else if (preg_match('/MSIE.*Windows NT/', $_SERVER['HTTP_USER_AGENT'])) {
326 // IE can't cope with application/xhtml+xml, but it will cope if we send application/xml with an XSL stylesheet.
327 $this->contenttype = 'application/xml; charset=utf-8';
328 $prolog .= '<?xml-stylesheet type="text/xsl" href="' . $CFG->httpswwwroot . '/lib/xhtml.xsl"?>' . "\n";
334 return $prolog . $doctype;
338 * The attributes that should be added to the <html> tag. Designed to
339 * be called in theme layout.php files.
341 * @return string HTML fragment.
343 public function htmlattributes() {
344 return get_html_lang(true) . ' xmlns="http://www.w3.org/1999/xhtml"';
348 * The standard tags (meta tags, links to stylesheets and JavaScript, etc.)
349 * that should be included in the <head> tag. Designed to be called in theme
352 * @return string HTML fragment.
354 public function standard_head_html() {
355 global $CFG, $SESSION;
357 $output .= '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />' . "\n";
358 $output .= '<meta name="keywords" content="moodle, ' . $this->page->title . '" />' . "\n";
359 if (!$this->page->cacheable) {
360 $output .= '<meta http-equiv="pragma" content="no-cache" />' . "\n";
361 $output .= '<meta http-equiv="expires" content="0" />' . "\n";
363 // This is only set by the {@link redirect()} method
364 $output .= $this->metarefreshtag;
366 // Check if a periodic refresh delay has been set and make sure we arn't
367 // already meta refreshing
368 if ($this->metarefreshtag=='' && $this->page->periodicrefreshdelay!==null) {
369 $output .= '<meta http-equiv="refresh" content="'.$this->page->periodicrefreshdelay.';url='.$this->page->url->out().'" />';
372 // flow player embedding support
373 $this->page->requires->js_function_call('M.util.load_flowplayer');
375 // Set up help link popups for all links with the helplinkpopup class
376 $this->page->requires->js_init_call('M.util.help_popups.setup');
378 $this->page->requires->js_function_call('setTimeout', array('fix_column_widths()', 20));
380 $focus = $this->page->focuscontrol;
381 if (!empty($focus)) {
382 if (preg_match("#forms\['([a-zA-Z0-9]+)'\].elements\['([a-zA-Z0-9]+)'\]#", $focus, $matches)) {
383 // This is a horrifically bad way to handle focus but it is passed in
384 // through messy formslib::moodleform
385 $this->page->requires->js_function_call('old_onload_focus', array($matches[1], $matches[2]));
386 } else if (strpos($focus, '.')!==false) {
387 // Old style of focus, bad way to do it
388 debugging('This code is using the old style focus event, Please update this code to focus on an element id or the moodleform focus method.', DEBUG_DEVELOPER);
389 $this->page->requires->js_function_call('old_onload_focus', explode('.', $focus, 2));
391 // Focus element with given id
392 $this->page->requires->js_function_call('focuscontrol', array($focus));
396 // Get the theme stylesheet - this has to be always first CSS, this loads also styles.css from all plugins;
397 // any other custom CSS can not be overridden via themes and is highly discouraged
398 $urls = $this->page->theme->css_urls($this->page);
399 foreach ($urls as $url) {
400 $this->page->requires->css_theme($url);
403 // Get the theme javascript head and footer
404 $jsurl = $this->page->theme->javascript_url(true);
405 $this->page->requires->js($jsurl, true);
406 $jsurl = $this->page->theme->javascript_url(false);
407 $this->page->requires->js($jsurl);
409 // Get any HTML from the page_requirements_manager.
410 $output .= $this->page->requires->get_head_code($this->page, $this);
412 // List alternate versions.
413 foreach ($this->page->alternateversions as $type => $alt) {
414 $output .= html_writer::empty_tag('link', array('rel' => 'alternate',
415 'type' => $type, 'title' => $alt->title, 'href' => $alt->url));
418 if (!empty($CFG->additionalhtmlhead)) {
419 $output .= "\n".$CFG->additionalhtmlhead;
426 * The standard tags (typically skip links) that should be output just inside
427 * the start of the <body> tag. Designed to be called in theme layout.php files.
429 * @return string HTML fragment.
431 public function standard_top_of_body_html() {
433 $output = $this->page->requires->get_top_of_body_code();
434 if (!empty($CFG->additionalhtmltopofbody)) {
435 $output .= "\n".$CFG->additionalhtmltopofbody;
441 * The standard tags (typically performance information and validation links,
442 * if we are in developer debug mode) that should be output in the footer area
443 * of the page. Designed to be called in theme layout.php files.
445 * @return string HTML fragment.
447 public function standard_footer_html() {
448 global $CFG, $SCRIPT;
450 // This function is normally called from a layout.php file in {@link core_renderer::header()}
451 // but some of the content won't be known until later, so we return a placeholder
452 // for now. This will be replaced with the real content in {@link core_renderer::footer()}.
453 $output = $this->unique_performance_info_token;
454 if ($this->page->devicetypeinuse == 'legacy') {
455 // The legacy theme is in use print the notification
456 $output .= html_writer::tag('div', get_string('legacythemeinuse'), array('class'=>'legacythemeinuse'));
459 // Get links to switch device types (only shown for users not on a default device)
460 $output .= $this->theme_switch_links();
462 if (!empty($CFG->debugpageinfo)) {
463 $output .= '<div class="performanceinfo pageinfo">This page is: ' . $this->page->debug_summary() . '</div>';
465 if (debugging(null, DEBUG_DEVELOPER) and has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) { // Only in developer mode
466 // Add link to profiling report if necessary
467 if (function_exists('profiling_is_running') && profiling_is_running()) {
468 $txt = get_string('profiledscript', 'admin');
469 $title = get_string('profiledscriptview', 'admin');
470 $url = $CFG->wwwroot . '/admin/tool/profiling/index.php?script=' . urlencode($SCRIPT);
471 $link= '<a title="' . $title . '" href="' . $url . '">' . $txt . '</a>';
472 $output .= '<div class="profilingfooter">' . $link . '</div>';
474 $output .= '<div class="purgecaches"><a href="'.$CFG->wwwroot.'/'.$CFG->admin.'/purgecaches.php?confirm=1&sesskey='.sesskey().'">'.get_string('purgecaches', 'admin').'</a></div>';
476 if (!empty($CFG->debugvalidators)) {
477 // NOTE: this is not a nice hack, $PAGE->url is not always accurate and $FULLME neither, it is not a bug if it fails. --skodak
478 $output .= '<div class="validators"><ul>
479 <li><a href="http://validator.w3.org/check?verbose=1&ss=1&uri=' . urlencode(qualified_me()) . '">Validate HTML</a></li>
480 <li><a href="http://www.contentquality.com/mynewtester/cynthia.exe?rptmode=-1&url1=' . urlencode(qualified_me()) . '">Section 508 Check</a></li>
481 <li><a href="http://www.contentquality.com/mynewtester/cynthia.exe?rptmode=0&warnp2n3e=1&url1=' . urlencode(qualified_me()) . '">WCAG 1 (2,3) Check</a></li>
484 if (!empty($CFG->additionalhtmlfooter)) {
485 $output .= "\n".$CFG->additionalhtmlfooter;
491 * Returns standard main content placeholder.
492 * Designed to be called in theme layout.php files.
494 * @return string HTML fragment.
496 public function main_content() {
497 return $this->unique_main_content_token;
501 * The standard tags (typically script tags that are not needed earlier) that
502 * should be output after everything else, . Designed to be called in theme layout.php files.
504 * @return string HTML fragment.
506 public function standard_end_of_body_html() {
507 // This function is normally called from a layout.php file in {@link core_renderer::header()}
508 // but some of the content won't be known until later, so we return a placeholder
509 // for now. This will be replaced with the real content in {@link core_renderer::footer()}.
510 return $this->unique_end_html_token;
514 * Return the standard string that says whether you are logged in (and switched
515 * roles/logged in as another user).
517 * @return string HTML fragment.
519 public function login_info() {
520 global $USER, $CFG, $DB, $SESSION;
522 if (during_initial_install()) {
526 $loginpage = ((string)$this->page->url === get_login_url());
527 $course = $this->page->course;
529 if (session_is_loggedinas()) {
530 $realuser = session_get_realuser();
531 $fullname = fullname($realuser, true);
532 $realuserinfo = " [<a href=\"$CFG->wwwroot/course/loginas.php?id=$course->id&sesskey=".sesskey()."\">$fullname</a>] ";
537 $loginurl = get_login_url();
539 if (empty($course->id)) {
540 // $course->id is not defined during installation
542 } else if (isloggedin()) {
543 $context = get_context_instance(CONTEXT_COURSE, $course->id);
545 $fullname = fullname($USER, true);
546 // Since Moodle 2.0 this link always goes to the public profile page (not the course profile page)
547 $username = "<a href=\"$CFG->wwwroot/user/profile.php?id=$USER->id\">$fullname</a>";
548 if (is_mnet_remote_user($USER) and $idprovider = $DB->get_record('mnet_host', array('id'=>$USER->mnethostid))) {
549 $username .= " from <a href=\"{$idprovider->wwwroot}\">{$idprovider->name}</a>";
552 $loggedinas = $realuserinfo.get_string('loggedinasguest');
554 $loggedinas .= " (<a href=\"$loginurl\">".get_string('login').'</a>)';
556 } else if (is_role_switched($course->id)) { // Has switched roles
558 if ($role = $DB->get_record('role', array('id'=>$USER->access['rsw'][$context->path]))) {
559 $rolename = ': '.format_string($role->name);
561 $loggedinas = get_string('loggedinas', 'moodle', $username).$rolename.
562 " (<a href=\"$CFG->wwwroot/course/view.php?id=$course->id&switchrole=0&sesskey=".sesskey()."\">".get_string('switchrolereturn').'</a>)';
564 $loggedinas = $realuserinfo.get_string('loggedinas', 'moodle', $username).' '.
565 " (<a href=\"$CFG->wwwroot/login/logout.php?sesskey=".sesskey()."\">".get_string('logout').'</a>)';
568 $loggedinas = get_string('loggedinnot', 'moodle');
570 $loggedinas .= " (<a href=\"$loginurl\">".get_string('login').'</a>)';
574 $loggedinas = '<div class="logininfo">'.$loggedinas.'</div>';
576 if (isset($SESSION->justloggedin)) {
577 unset($SESSION->justloggedin);
578 if (!empty($CFG->displayloginfailures)) {
579 if (!isguestuser()) {
580 if ($count = count_login_failures($CFG->displayloginfailures, $USER->username, $USER->lastlogin)) {
581 $loggedinas .= ' <div class="loginfailures">';
582 if (empty($count->accounts)) {
583 $loggedinas .= get_string('failedloginattempts', '', $count);
585 $loggedinas .= get_string('failedloginattemptsall', '', $count);
587 if (file_exists("$CFG->dirroot/report/log/index.php") and has_capability('report/log:view', get_context_instance(CONTEXT_SYSTEM))) {
588 $loggedinas .= ' (<a href="'.$CFG->wwwroot.'/report/log/index.php'.
589 '?chooselog=1&id=1&modid=site_errors">'.get_string('logs').'</a>)';
591 $loggedinas .= '</div>';
601 * Return the 'back' link that normally appears in the footer.
603 * @return string HTML fragment.
605 public function home_link() {
608 if ($this->page->pagetype == 'site-index') {
609 // Special case for site home page - please do not remove
610 return '<div class="sitelink">' .
611 '<a title="Moodle" href="http://moodle.org/">' .
612 '<img style="width:100px;height:30px" src="' . $this->pix_url('moodlelogo') . '" alt="moodlelogo" /></a></div>';
614 } else if (!empty($CFG->target_release) && $CFG->target_release != $CFG->release) {
615 // Special case for during install/upgrade.
616 return '<div class="sitelink">'.
617 '<a title="Moodle" href="http://docs.moodle.org/en/Administrator_documentation" onclick="this.target=\'_blank\'">' .
618 '<img style="width:100px;height:30px" src="' . $this->pix_url('moodlelogo') . '" alt="moodlelogo" /></a></div>';
620 } else if ($this->page->course->id == $SITE->id || strpos($this->page->pagetype, 'course-view') === 0) {
621 return '<div class="homelink"><a href="' . $CFG->wwwroot . '/">' .
622 get_string('home') . '</a></div>';
625 return '<div class="homelink"><a href="' . $CFG->wwwroot . '/course/view.php?id=' . $this->page->course->id . '">' .
626 format_string($this->page->course->shortname, true, array('context' => $this->page->context)) . '</a></div>';
631 * Redirects the user by any means possible given the current state
633 * This function should not be called directly, it should always be called using
634 * the redirect function in lib/weblib.php
636 * The redirect function should really only be called before page output has started
637 * however it will allow itself to be called during the state STATE_IN_BODY
639 * @param string $encodedurl The URL to send to encoded if required
640 * @param string $message The message to display to the user if any
641 * @param int $delay The delay before redirecting a user, if $message has been
642 * set this is a requirement and defaults to 3, set to 0 no delay
643 * @param boolean $debugdisableredirect this redirect has been disabled for
644 * debugging purposes. Display a message that explains, and don't
645 * trigger the redirect.
646 * @return string The HTML to display to the user before dying, may contain
647 * meta refresh, javascript refresh, and may have set header redirects
649 public function redirect_message($encodedurl, $message, $delay, $debugdisableredirect) {
651 $url = str_replace('&', '&', $encodedurl);
653 switch ($this->page->state) {
654 case moodle_page::STATE_BEFORE_HEADER :
655 // No output yet it is safe to delivery the full arsenal of redirect methods
656 if (!$debugdisableredirect) {
657 // Don't use exactly the same time here, it can cause problems when both redirects fire at the same time.
658 $this->metarefreshtag = '<meta http-equiv="refresh" content="'. $delay .'; url='. $encodedurl .'" />'."\n";
659 $this->page->requires->js_function_call('document.location.replace', array($url), false, ($delay + 3));
661 $output = $this->header();
663 case moodle_page::STATE_PRINTING_HEADER :
664 // We should hopefully never get here
665 throw new coding_exception('You cannot redirect while printing the page header');
667 case moodle_page::STATE_IN_BODY :
668 // We really shouldn't be here but we can deal with this
669 debugging("You should really redirect before you start page output");
670 if (!$debugdisableredirect) {
671 $this->page->requires->js_function_call('document.location.replace', array($url), false, $delay);
673 $output = $this->opencontainers->pop_all_but_last();
675 case moodle_page::STATE_DONE :
676 // Too late to be calling redirect now
677 throw new coding_exception('You cannot redirect after the entire page has been generated');
680 $output .= $this->notification($message, 'redirectmessage');
681 $output .= '<div class="continuebutton">(<a href="'. $encodedurl .'">'. get_string('continue') .'</a>)</div>';
682 if ($debugdisableredirect) {
683 $output .= '<p><strong>Error output, so disabling automatic redirect.</strong></p>';
685 $output .= $this->footer();
690 * Start output by sending the HTTP headers, and printing the HTML <head>
691 * and the start of the <body>.
693 * To control what is printed, you should set properties on $PAGE. If you
694 * are familiar with the old {@link print_header()} function from Moodle 1.9
695 * you will find that there are properties on $PAGE that correspond to most
696 * of the old parameters to could be passed to print_header.
698 * Not that, in due course, the remaining $navigation, $menu parameters here
699 * will be replaced by more properties of $PAGE, but that is still to do.
701 * @return string HTML that you must output this, preferably immediately.
703 public function header() {
706 if (session_is_loggedinas()) {
707 $this->page->add_body_class('userloggedinas');
710 $this->page->set_state(moodle_page::STATE_PRINTING_HEADER);
712 // Find the appropriate page layout file, based on $this->page->pagelayout.
713 $layoutfile = $this->page->theme->layout_file($this->page->pagelayout);
714 // Render the layout using the layout file.
715 $rendered = $this->render_page_layout($layoutfile);
717 // Slice the rendered output into header and footer.
718 $cutpos = strpos($rendered, $this->unique_main_content_token);
719 if ($cutpos === false) {
720 $cutpos = strpos($rendered, self::MAIN_CONTENT_TOKEN);
721 $token = self::MAIN_CONTENT_TOKEN;
723 $token = $this->unique_main_content_token;
726 if ($cutpos === false) {
727 throw new coding_exception('page layout file ' . $layoutfile . ' does not contain the main content placeholder, please include "<?php echo $OUTPUT->main_content() ?>" in theme layout file.');
729 $header = substr($rendered, 0, $cutpos);
730 $footer = substr($rendered, $cutpos + strlen($token));
732 if (empty($this->contenttype)) {
733 debugging('The page layout file did not call $OUTPUT->doctype()');
734 $header = $this->doctype() . $header;
737 send_headers($this->contenttype, $this->page->cacheable);
739 $this->opencontainers->push('header/footer', $footer);
740 $this->page->set_state(moodle_page::STATE_IN_BODY);
742 return $header . $this->skip_link_target('maincontent');
746 * Renders and outputs the page layout file.
748 * This is done by preparing the normal globals available to a script, and
749 * then including the layout file provided by the current theme for the
752 * @param string $layoutfile The name of the layout file
753 * @return string HTML code
755 protected function render_page_layout($layoutfile) {
756 global $CFG, $SITE, $USER;
757 // The next lines are a bit tricky. The point is, here we are in a method
758 // of a renderer class, and this object may, or may not, be the same as
759 // the global $OUTPUT object. When rendering the page layout file, we want to use
760 // this object. However, people writing Moodle code expect the current
761 // renderer to be called $OUTPUT, not $this, so define a variable called
762 // $OUTPUT pointing at $this. The same comment applies to $PAGE and $COURSE.
765 $COURSE = $this->page->course;
768 include($layoutfile);
769 $rendered = ob_get_contents();
775 * Outputs the page's footer
777 * @return string HTML fragment
779 public function footer() {
782 $output = $this->container_end_all(true);
784 $footer = $this->opencontainers->pop('header/footer');
786 if (debugging() and $DB and $DB->is_transaction_started()) {
787 // TODO: MDL-20625 print warning - transaction will be rolled back
790 // Provide some performance info if required
791 $performanceinfo = '';
792 if (defined('MDL_PERF') || (!empty($CFG->perfdebug) and $CFG->perfdebug > 7)) {
793 $perf = get_performance_info();
794 if (defined('MDL_PERFTOLOG') && !function_exists('register_shutdown_function')) {
795 error_log("PERF: " . $perf['txt']);
797 if (defined('MDL_PERFTOFOOT') || debugging() || $CFG->perfdebug > 7) {
798 $performanceinfo = $perf['html'];
801 $footer = str_replace($this->unique_performance_info_token, $performanceinfo, $footer);
803 $footer = str_replace($this->unique_end_html_token, $this->page->requires->get_end_code(), $footer);
805 $this->page->set_state(moodle_page::STATE_DONE);
807 return $output . $footer;
811 * Close all but the last open container. This is useful in places like error
812 * handling, where you want to close all the open containers (apart from <body>)
813 * before outputting the error message.
815 * @param bool $shouldbenone assert that the stack should be empty now - causes a
816 * developer debug warning if it isn't.
817 * @return string the HTML required to close any open containers inside <body>.
819 public function container_end_all($shouldbenone = false) {
820 return $this->opencontainers->pop_all_but_last($shouldbenone);
824 * Returns lang menu or '', this method also checks forcing of languages in courses.
826 * @return string The lang menu HTML or empty string
828 public function lang_menu() {
831 if (empty($CFG->langmenu)) {
835 if ($this->page->course != SITEID and !empty($this->page->course->lang)) {
836 // do not show lang menu if language forced
840 $currlang = current_language();
841 $langs = get_string_manager()->get_list_of_translations();
843 if (count($langs) < 2) {
847 $s = new single_select($this->page->url, 'lang', $langs, $currlang, null);
848 $s->label = get_accesshide(get_string('language'));
849 $s->class = 'langmenu';
850 return $this->render($s);
854 * Output the row of editing icons for a block, as defined by the controls array.
856 * @param array $controls an array like {@link block_contents::$controls}.
857 * @return string HTML fragment.
859 public function block_controls($controls) {
860 if (empty($controls)) {
863 $controlshtml = array();
864 foreach ($controls as $control) {
865 $controlshtml[] = html_writer::tag('a',
866 html_writer::empty_tag('img', array('src' => $this->pix_url($control['icon'])->out(false), 'alt' => $control['caption'])),
867 array('class' => 'icon ' . $control['class'],'title' => $control['caption'], 'href' => $control['url']));
869 return html_writer::tag('div', implode('', $controlshtml), array('class' => 'commands'));
873 * Prints a nice side block with an optional header.
875 * The content is described
876 * by a {@link core_renderer::block_contents} object.
878 * <div id="inst{$instanceid}" class="block_{$blockname} block">
879 * <div class="header"></div>
880 * <div class="content">
882 * <div class="footer">
885 * <div class="annotation">
889 * @param block_contents $bc HTML for the content
890 * @param string $region the region the block is appearing in.
891 * @return string the HTML to be output.
893 public function block(block_contents $bc, $region) {
894 $bc = clone($bc); // Avoid messing up the object passed in.
895 if (empty($bc->blockinstanceid) || !strip_tags($bc->title)) {
896 $bc->collapsible = block_contents::NOT_HIDEABLE;
898 if ($bc->collapsible == block_contents::HIDDEN) {
899 $bc->add_class('hidden');
901 if (!empty($bc->controls)) {
902 $bc->add_class('block_with_controls');
905 $skiptitle = strip_tags($bc->title);
906 if (empty($skiptitle)) {
910 $output = html_writer::tag('a', get_string('skipa', 'access', $skiptitle), array('href' => '#sb-' . $bc->skipid, 'class' => 'skip-block'));
911 $skipdest = html_writer::tag('span', '', array('id' => 'sb-' . $bc->skipid, 'class' => 'skip-block-to'));
914 $output .= html_writer::start_tag('div', $bc->attributes);
916 $output .= $this->block_header($bc);
917 $output .= $this->block_content($bc);
919 $output .= html_writer::end_tag('div');
921 $output .= $this->block_annotation($bc);
923 $output .= $skipdest;
925 $this->init_block_hider_js($bc);
930 * Produces a header for a block
932 * @param block_contents $bc
935 protected function block_header(block_contents $bc) {
939 $title = html_writer::tag('h2', $bc->title, null);
942 $controlshtml = $this->block_controls($bc->controls);
945 if ($title || $controlshtml) {
946 $output .= html_writer::tag('div', html_writer::tag('div', html_writer::tag('div', '', array('class'=>'block_action')). $title . $controlshtml, array('class' => 'title')), array('class' => 'header'));
952 * Produces the content area for a block
954 * @param block_contents $bc
957 protected function block_content(block_contents $bc) {
958 $output = html_writer::start_tag('div', array('class' => 'content'));
959 if (!$bc->title && !$this->block_controls($bc->controls)) {
960 $output .= html_writer::tag('div', '', array('class'=>'block_action notitle'));
962 $output .= $bc->content;
963 $output .= $this->block_footer($bc);
964 $output .= html_writer::end_tag('div');
970 * Produces the footer for a block
972 * @param block_contents $bc
975 protected function block_footer(block_contents $bc) {
978 $output .= html_writer::tag('div', $bc->footer, array('class' => 'footer'));
984 * Produces the annotation for a block
986 * @param block_contents $bc
989 protected function block_annotation(block_contents $bc) {
991 if ($bc->annotation) {
992 $output .= html_writer::tag('div', $bc->annotation, array('class' => 'blockannotation'));
998 * Calls the JS require function to hide a block.
1000 * @param block_contents $bc A block_contents object
1002 protected function init_block_hider_js(block_contents $bc) {
1003 if (!empty($bc->attributes['id']) and $bc->collapsible != block_contents::NOT_HIDEABLE) {
1004 $config = new stdClass;
1005 $config->id = $bc->attributes['id'];
1006 $config->title = strip_tags($bc->title);
1007 $config->preference = 'block' . $bc->blockinstanceid . 'hidden';
1008 $config->tooltipVisible = get_string('hideblocka', 'access', $config->title);
1009 $config->tooltipHidden = get_string('showblocka', 'access', $config->title);
1011 $this->page->requires->js_init_call('M.util.init_block_hider', array($config));
1012 user_preference_allow_ajax_update($config->preference, PARAM_BOOL);
1017 * Render the contents of a block_list.
1019 * @param array $icons the icon for each item.
1020 * @param array $items the content of each item.
1021 * @return string HTML
1023 public function list_block_contents($icons, $items) {
1026 foreach ($items as $key => $string) {
1027 $item = html_writer::start_tag('li', array('class' => 'r' . $row));
1028 if (!empty($icons[$key])) { //test if the content has an assigned icon
1029 $item .= html_writer::tag('div', $icons[$key], array('class' => 'icon column c0'));
1031 $item .= html_writer::tag('div', $string, array('class' => 'column c1'));
1032 $item .= html_writer::end_tag('li');
1034 $row = 1 - $row; // Flip even/odd.
1036 return html_writer::tag('ul', implode("\n", $lis), array('class' => 'unlist'));
1040 * Output all the blocks in a particular region.
1042 * @param string $region the name of a region on this page.
1043 * @return string the HTML to be output.
1045 public function blocks_for_region($region) {
1046 $blockcontents = $this->page->blocks->get_content_for_region($region, $this);
1049 foreach ($blockcontents as $bc) {
1050 if ($bc instanceof block_contents) {
1051 $output .= $this->block($bc, $region);
1052 } else if ($bc instanceof block_move_target) {
1053 $output .= $this->block_move_target($bc);
1055 throw new coding_exception('Unexpected type of thing (' . get_class($bc) . ') found in list of block contents.');
1062 * Output a place where the block that is currently being moved can be dropped.
1064 * @param block_move_target $target with the necessary details.
1065 * @return string the HTML to be output.
1067 public function block_move_target($target) {
1068 return html_writer::tag('a', html_writer::tag('span', $target->text, array('class' => 'accesshide')), array('href' => $target->url, 'class' => 'blockmovetarget'));
1072 * Renders a special html link with attached action
1074 * @param string|moodle_url $url
1075 * @param string $text HTML fragment
1076 * @param component_action $action
1077 * @param array $attributes associative array of html link attributes + disabled
1078 * @return string HTML fragment
1080 public function action_link($url, $text, component_action $action = null, array $attributes=null) {
1081 if (!($url instanceof moodle_url)) {
1082 $url = new moodle_url($url);
1084 $link = new action_link($url, $text, $action, $attributes);
1086 return $this->render($link);
1090 * Renders an action_link object.
1092 * The provided link is renderer and the HTML returned. At the same time the
1093 * associated actions are setup in JS by {@link core_renderer::add_action_handler()}
1095 * @param action_link $link
1096 * @return string HTML fragment
1098 protected function render_action_link(action_link $link) {
1101 if ($link->text instanceof renderable) {
1102 $text = $this->render($link->text);
1104 $text = $link->text;
1107 // A disabled link is rendered as formatted text
1108 if (!empty($link->attributes['disabled'])) {
1109 // do not use div here due to nesting restriction in xhtml strict
1110 return html_writer::tag('span', $text, array('class'=>'currentlink'));
1113 $attributes = $link->attributes;
1114 unset($link->attributes['disabled']);
1115 $attributes['href'] = $link->url;
1117 if ($link->actions) {
1118 if (empty($attributes['id'])) {
1119 $id = html_writer::random_id('action_link');
1120 $attributes['id'] = $id;
1122 $id = $attributes['id'];
1124 foreach ($link->actions as $action) {
1125 $this->add_action_handler($action, $id);
1129 return html_writer::tag('a', $text, $attributes);
1134 * Renders an action_icon.
1136 * This function uses the {@link core_renderer::action_link()} method for the
1137 * most part. What it does different is prepare the icon as HTML and use it
1140 * @param string|moodle_url $url A string URL or moodel_url
1141 * @param pix_icon $pixicon
1142 * @param component_action $action
1143 * @param array $attributes associative array of html link attributes + disabled
1144 * @param bool $linktext show title next to image in link
1145 * @return string HTML fragment
1147 public function action_icon($url, pix_icon $pixicon, component_action $action = null, array $attributes = null, $linktext=false) {
1148 if (!($url instanceof moodle_url)) {
1149 $url = new moodle_url($url);
1151 $attributes = (array)$attributes;
1153 if (empty($attributes['class'])) {
1154 // let ppl override the class via $options
1155 $attributes['class'] = 'action-icon';
1158 $icon = $this->render($pixicon);
1161 $text = $pixicon->attributes['alt'];
1166 return $this->action_link($url, $text.$icon, $action, $attributes);
1170 * Print a message along with button choices for Continue/Cancel
1172 * If a string or moodle_url is given instead of a single_button, method defaults to post.
1174 * @param string $message The question to ask the user
1175 * @param single_button|moodle_url|string $continue The single_button component representing the Continue answer. Can also be a moodle_url or string URL
1176 * @param single_button|moodle_url|string $cancel The single_button component representing the Cancel answer. Can also be a moodle_url or string URL
1177 * @return string HTML fragment
1179 public function confirm($message, $continue, $cancel) {
1180 if ($continue instanceof single_button) {
1182 } else if (is_string($continue)) {
1183 $continue = new single_button(new moodle_url($continue), get_string('continue'), 'post');
1184 } else if ($continue instanceof moodle_url) {
1185 $continue = new single_button($continue, get_string('continue'), 'post');
1187 throw new coding_exception('The continue param to $OUTPUT->confirm() must be either a URL (string/moodle_url) or a single_button instance.');
1190 if ($cancel instanceof single_button) {
1192 } else if (is_string($cancel)) {
1193 $cancel = new single_button(new moodle_url($cancel), get_string('cancel'), 'get');
1194 } else if ($cancel instanceof moodle_url) {
1195 $cancel = new single_button($cancel, get_string('cancel'), 'get');
1197 throw new coding_exception('The cancel param to $OUTPUT->confirm() must be either a URL (string/moodle_url) or a single_button instance.');
1200 $output = $this->box_start('generalbox', 'notice');
1201 $output .= html_writer::tag('p', $message);
1202 $output .= html_writer::tag('div', $this->render($continue) . $this->render($cancel), array('class' => 'buttons'));
1203 $output .= $this->box_end();
1208 * Returns a form with a single button.
1210 * @param string|moodle_url $url
1211 * @param string $label button text
1212 * @param string $method get or post submit method
1213 * @param array $options associative array {disabled, title, etc.}
1214 * @return string HTML fragment
1216 public function single_button($url, $label, $method='post', array $options=null) {
1217 if (!($url instanceof moodle_url)) {
1218 $url = new moodle_url($url);
1220 $button = new single_button($url, $label, $method);
1222 foreach ((array)$options as $key=>$value) {
1223 if (array_key_exists($key, $button)) {
1224 $button->$key = $value;
1228 return $this->render($button);
1232 * Renders a single button widget.
1234 * This will return HTML to display a form containing a single button.
1236 * @param single_button $button
1237 * @return string HTML fragment
1239 protected function render_single_button(single_button $button) {
1240 $attributes = array('type' => 'submit',
1241 'value' => $button->label,
1242 'disabled' => $button->disabled ? 'disabled' : null,
1243 'title' => $button->tooltip);
1245 if ($button->actions) {
1246 $id = html_writer::random_id('single_button');
1247 $attributes['id'] = $id;
1248 foreach ($button->actions as $action) {
1249 $this->add_action_handler($action, $id);
1253 // first the input element
1254 $output = html_writer::empty_tag('input', $attributes);
1256 // then hidden fields
1257 $params = $button->url->params();
1258 if ($button->method === 'post') {
1259 $params['sesskey'] = sesskey();
1261 foreach ($params as $var => $val) {
1262 $output .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => $var, 'value' => $val));
1265 // then div wrapper for xhtml strictness
1266 $output = html_writer::tag('div', $output);
1268 // now the form itself around it
1269 if ($button->method === 'get') {
1270 $url = $button->url->out_omit_querystring(true); // url without params, the anchor part allowed
1272 $url = $button->url->out_omit_querystring(); // url without params, the anchor part not allowed
1275 $url = '#'; // there has to be always some action
1277 $attributes = array('method' => $button->method,
1279 'id' => $button->formid);
1280 $output = html_writer::tag('form', $output, $attributes);
1282 // and finally one more wrapper with class
1283 return html_writer::tag('div', $output, array('class' => $button->class));
1287 * Returns a form with a single select widget.
1289 * @param moodle_url $url form action target, includes hidden fields
1290 * @param string $name name of selection field - the changing parameter in url
1291 * @param array $options list of options
1292 * @param string $selected selected element
1293 * @param array $nothing
1294 * @param string $formid
1295 * @return string HTML fragment
1297 public function single_select($url, $name, array $options, $selected = '', $nothing = array('' => 'choosedots'), $formid = null) {
1298 if (!($url instanceof moodle_url)) {
1299 $url = new moodle_url($url);
1301 $select = new single_select($url, $name, $options, $selected, $nothing, $formid);
1303 return $this->render($select);
1307 * Internal implementation of single_select rendering
1309 * @param single_select $select
1310 * @return string HTML fragment
1312 protected function render_single_select(single_select $select) {
1313 $select = clone($select);
1314 if (empty($select->formid)) {
1315 $select->formid = html_writer::random_id('single_select_f');
1319 $params = $select->url->params();
1320 if ($select->method === 'post') {
1321 $params['sesskey'] = sesskey();
1323 foreach ($params as $name=>$value) {
1324 $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>$name, 'value'=>$value));
1327 if (empty($select->attributes['id'])) {
1328 $select->attributes['id'] = html_writer::random_id('single_select');
1331 if ($select->disabled) {
1332 $select->attributes['disabled'] = 'disabled';
1335 if ($select->tooltip) {
1336 $select->attributes['title'] = $select->tooltip;
1339 if ($select->label) {
1340 $output .= html_writer::label($select->label, $select->attributes['id'], false, $select->labelattributes);
1343 if ($select->helpicon instanceof help_icon) {
1344 $output .= $this->render($select->helpicon);
1345 } else if ($select->helpicon instanceof old_help_icon) {
1346 $output .= $this->render($select->helpicon);
1348 $output .= html_writer::select($select->options, $select->name, $select->selected, $select->nothing, $select->attributes);
1350 $go = html_writer::empty_tag('input', array('type'=>'submit', 'value'=>get_string('go')));
1351 $output .= html_writer::tag('noscript', html_writer::tag('div', $go), array('style'=>'inline'));
1353 $nothing = empty($select->nothing) ? false : key($select->nothing);
1354 $this->page->requires->js_init_call('M.util.init_select_autosubmit', array($select->formid, $select->attributes['id'], $nothing));
1356 // then div wrapper for xhtml strictness
1357 $output = html_writer::tag('div', $output);
1359 // now the form itself around it
1360 if ($select->method === 'get') {
1361 $url = $select->url->out_omit_querystring(true); // url without params, the anchor part allowed
1363 $url = $select->url->out_omit_querystring(); // url without params, the anchor part not allowed
1365 $formattributes = array('method' => $select->method,
1367 'id' => $select->formid);
1368 $output = html_writer::tag('form', $output, $formattributes);
1370 // and finally one more wrapper with class
1371 return html_writer::tag('div', $output, array('class' => $select->class));
1375 * Returns a form with a url select widget.
1377 * @param array $urls list of urls - array('/course/view.php?id=1'=>'Frontpage', ....)
1378 * @param string $selected selected element
1379 * @param array $nothing
1380 * @param string $formid
1381 * @return string HTML fragment
1383 public function url_select(array $urls, $selected, $nothing = array('' => 'choosedots'), $formid = null) {
1384 $select = new url_select($urls, $selected, $nothing, $formid);
1385 return $this->render($select);
1389 * Internal implementation of url_select rendering
1391 * @param url_select $select
1392 * @return string HTML fragment
1394 protected function render_url_select(url_select $select) {
1397 $select = clone($select);
1398 if (empty($select->formid)) {
1399 $select->formid = html_writer::random_id('url_select_f');
1402 if (empty($select->attributes['id'])) {
1403 $select->attributes['id'] = html_writer::random_id('url_select');
1406 if ($select->disabled) {
1407 $select->attributes['disabled'] = 'disabled';
1410 if ($select->tooltip) {
1411 $select->attributes['title'] = $select->tooltip;
1416 if ($select->label) {
1417 $output .= html_writer::label($select->label, $select->attributes['id'], false, $select->labelattributes);
1420 if ($select->helpicon instanceof help_icon) {
1421 $output .= $this->render($select->helpicon);
1422 } else if ($select->helpicon instanceof old_help_icon) {
1423 $output .= $this->render($select->helpicon);
1426 // For security reasons, the script course/jumpto.php requires URL starting with '/'. To keep
1427 // backward compatibility, we are removing heading $CFG->wwwroot from URLs here.
1429 foreach ($select->urls as $k=>$v) {
1431 // optgroup structure
1432 foreach ($v as $optgrouptitle => $optgroupoptions) {
1433 foreach ($optgroupoptions as $optionurl => $optiontitle) {
1434 if (empty($optionurl)) {
1435 $safeoptionurl = '';
1436 } else if (strpos($optionurl, $CFG->wwwroot.'/') === 0) {
1437 // debugging('URLs passed to url_select should be in local relative form - please fix the code.', DEBUG_DEVELOPER);
1438 $safeoptionurl = str_replace($CFG->wwwroot, '', $optionurl);
1439 } else if (strpos($optionurl, '/') !== 0) {
1440 debugging("Invalid url_select urls parameter inside optgroup: url '$optionurl' is not local relative url!");
1443 $safeoptionurl = $optionurl;
1445 $urls[$k][$optgrouptitle][$safeoptionurl] = $optiontitle;
1449 // plain list structure
1451 // nothing selected option
1452 } else if (strpos($k, $CFG->wwwroot.'/') === 0) {
1453 $k = str_replace($CFG->wwwroot, '', $k);
1454 } else if (strpos($k, '/') !== 0) {
1455 debugging("Invalid url_select urls parameter: url '$k' is not local relative url!");
1461 $selected = $select->selected;
1462 if (!empty($selected)) {
1463 if (strpos($select->selected, $CFG->wwwroot.'/') === 0) {
1464 $selected = str_replace($CFG->wwwroot, '', $selected);
1465 } else if (strpos($selected, '/') !== 0) {
1466 debugging("Invalid value of parameter 'selected': url '$selected' is not local relative url!");
1470 $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>'sesskey', 'value'=>sesskey()));
1471 $output .= html_writer::select($urls, 'jump', $selected, $select->nothing, $select->attributes);
1473 if (!$select->showbutton) {
1474 $go = html_writer::empty_tag('input', array('type'=>'submit', 'value'=>get_string('go')));
1475 $output .= html_writer::tag('noscript', html_writer::tag('div', $go), array('style'=>'inline'));
1476 $nothing = empty($select->nothing) ? false : key($select->nothing);
1477 $output .= $this->page->requires->js_init_call('M.util.init_url_select', array($select->formid, $select->attributes['id'], $nothing));
1479 $output .= html_writer::empty_tag('input', array('type'=>'submit', 'value'=>$select->showbutton));
1482 // then div wrapper for xhtml strictness
1483 $output = html_writer::tag('div', $output);
1485 // now the form itself around it
1486 $formattributes = array('method' => 'post',
1487 'action' => new moodle_url('/course/jumpto.php'),
1488 'id' => $select->formid);
1489 $output = html_writer::tag('form', $output, $formattributes);
1491 // and finally one more wrapper with class
1492 return html_writer::tag('div', $output, array('class' => $select->class));
1496 * Returns a string containing a link to the user documentation.
1497 * Also contains an icon by default. Shown to teachers and admin only.
1499 * @param string $path The page link after doc root and language, no leading slash.
1500 * @param string $text The text to be displayed for the link
1501 * @param boolean $forcepopup Whether to force a popup regardless of the value of $CFG->doctonewwindow
1504 public function doc_link($path, $text = '', $forcepopup = false) {
1507 $icon = $this->pix_icon('docs', $text, 'moodle', array('class'=>'iconhelp'));
1509 $url = new moodle_url(get_docs_url($path));
1511 $attributes = array('href'=>$url);
1512 if (!empty($CFG->doctonewwindow) || $forcepopup) {
1513 $attributes['class'] = 'helplinkpopup';
1516 return html_writer::tag('a', $icon.$text, $attributes);
1520 * Return HTML for a pix_icon.
1522 * @param string $pix short pix name
1523 * @param string $alt mandatory alt attribute
1524 * @param string $component standard compoennt name like 'moodle', 'mod_forum', etc.
1525 * @param array $attributes htm lattributes
1526 * @return string HTML fragment
1528 public function pix_icon($pix, $alt, $component='moodle', array $attributes = null) {
1529 $icon = new pix_icon($pix, $alt, $component, $attributes);
1530 return $this->render($icon);
1534 * Renders a pix_icon widget and returns the HTML to display it.
1536 * @param pix_icon $icon
1537 * @return string HTML fragment
1539 protected function render_pix_icon(pix_icon $icon) {
1540 $attributes = $icon->attributes;
1541 $attributes['src'] = $this->pix_url($icon->pix, $icon->component);
1542 return html_writer::empty_tag('img', $attributes);
1546 * Return HTML to display an emoticon icon.
1548 * @param pix_emoticon $emoticon
1549 * @return string HTML fragment
1551 protected function render_pix_emoticon(pix_emoticon $emoticon) {
1552 $attributes = $emoticon->attributes;
1553 $attributes['src'] = $this->pix_url($emoticon->pix, $emoticon->component);
1554 return html_writer::empty_tag('img', $attributes);
1558 * Produces the html that represents this rating in the UI
1560 * @param rating $rating the page object on which this rating will appear
1563 function render_rating(rating $rating) {
1566 if ($rating->settings->aggregationmethod == RATING_AGGREGATE_NONE) {
1567 return null;//ratings are turned off
1570 $ratingmanager = new rating_manager();
1571 // Initialise the JavaScript so ratings can be done by AJAX.
1572 $ratingmanager->initialise_rating_javascript($this->page);
1574 $strrate = get_string("rate", "rating");
1575 $ratinghtml = ''; //the string we'll return
1577 // permissions check - can they view the aggregate?
1578 if ($rating->user_can_view_aggregate()) {
1580 $aggregatelabel = $ratingmanager->get_aggregate_label($rating->settings->aggregationmethod);
1581 $aggregatestr = $rating->get_aggregate_string();
1583 $aggregatehtml = html_writer::tag('span', $aggregatestr, array('id' => 'ratingaggregate'.$rating->itemid, 'class' => 'ratingaggregate')).' ';
1584 if ($rating->count > 0) {
1585 $countstr = "({$rating->count})";
1589 $aggregatehtml .= html_writer::tag('span', $countstr, array('id'=>"ratingcount{$rating->itemid}", 'class' => 'ratingcount')).' ';
1591 $ratinghtml .= html_writer::tag('span', $aggregatelabel, array('class'=>'rating-aggregate-label'));
1592 if ($rating->settings->permissions->viewall && $rating->settings->pluginpermissions->viewall) {
1594 $nonpopuplink = $rating->get_view_ratings_url();
1595 $popuplink = $rating->get_view_ratings_url(true);
1597 $action = new popup_action('click', $popuplink, 'ratings', array('height' => 400, 'width' => 600));
1598 $ratinghtml .= $this->action_link($nonpopuplink, $aggregatehtml, $action);
1600 $ratinghtml .= $aggregatehtml;
1605 // if the item doesn't belong to the current user, the user has permission to rate
1606 // and we're within the assessable period
1607 if ($rating->user_can_rate()) {
1609 $rateurl = $rating->get_rate_url();
1610 $inputs = $rateurl->params();
1612 //start the rating form
1614 'id' => "postrating{$rating->itemid}",
1615 'class' => 'postratingform',
1617 'action' => $rateurl->out_omit_querystring()
1619 $formstart = html_writer::start_tag('form', $formattrs);
1620 $formstart .= html_writer::start_tag('div', array('class' => 'ratingform'));
1622 // add the hidden inputs
1623 foreach ($inputs as $name => $value) {
1624 $attributes = array('type' => 'hidden', 'class' => 'ratinginput', 'name' => $name, 'value' => $value);
1625 $formstart .= html_writer::empty_tag('input', $attributes);
1628 if (empty($ratinghtml)) {
1629 $ratinghtml .= $strrate.': ';
1631 $ratinghtml = $formstart.$ratinghtml;
1633 $scalearray = array(RATING_UNSET_RATING => $strrate.'...') + $rating->settings->scale->scaleitems;
1634 $scaleattrs = array('class'=>'postratingmenu ratinginput','id'=>'menurating'.$rating->itemid);
1635 $ratinghtml .= html_writer::label($rating->rating, 'menurating'.$rating->itemid, false, array('class' => 'accesshide'));
1636 $ratinghtml .= html_writer::select($scalearray, 'rating', $rating->rating, false, $scaleattrs);
1638 //output submit button
1639 $ratinghtml .= html_writer::start_tag('span', array('class'=>"ratingsubmit"));
1641 $attributes = array('type' => 'submit', 'class' => 'postratingmenusubmit', 'id' => 'postratingsubmit'.$rating->itemid, 'value' => s(get_string('rate', 'rating')));
1642 $ratinghtml .= html_writer::empty_tag('input', $attributes);
1644 if (!$rating->settings->scale->isnumeric) {
1645 // If a global scale, try to find current course ID from the context
1646 if (empty($rating->settings->scale->courseid) and $coursecontext = $rating->context->get_course_context(false)) {
1647 $courseid = $coursecontext->instanceid;
1649 $courseid = $rating->settings->scale->courseid;
1651 $ratinghtml .= $this->help_icon_scale($courseid, $rating->settings->scale);
1653 $ratinghtml .= html_writer::end_tag('span');
1654 $ratinghtml .= html_writer::end_tag('div');
1655 $ratinghtml .= html_writer::end_tag('form');
1662 * Centered heading with attached help button (same title text)
1663 * and optional icon attached.
1665 * @param string $text A heading text
1666 * @param string $helpidentifier The keyword that defines a help page
1667 * @param string $component component name
1668 * @param string|moodle_url $icon
1669 * @param string $iconalt icon alt text
1670 * @return string HTML fragment
1672 public function heading_with_help($text, $helpidentifier, $component = 'moodle', $icon = '', $iconalt = '') {
1675 $image = $this->pix_icon($icon, $iconalt, $component, array('class'=>'icon'));
1679 if ($helpidentifier) {
1680 $help = $this->help_icon($helpidentifier, $component);
1683 return $this->heading($image.$text.$help, 2, 'main help');
1687 * Returns HTML to display a help icon.
1689 * @deprecated since Moodle 2.0
1690 * @param string $helpidentifier The keyword that defines a help page
1691 * @param string $title A descriptive text for accessibility only
1692 * @param string $component component name
1693 * @param string|bool $linktext true means use $title as link text, string means link text value
1694 * @return string HTML fragment
1696 public function old_help_icon($helpidentifier, $title, $component = 'moodle', $linktext = '') {
1697 debugging('The method old_help_icon() is deprecated, please fix the code and use help_icon() method instead', DEBUG_DEVELOPER);
1698 $icon = new old_help_icon($helpidentifier, $title, $component);
1699 if ($linktext === true) {
1700 $icon->linktext = $title;
1701 } else if (!empty($linktext)) {
1702 $icon->linktext = $linktext;
1704 return $this->render($icon);
1708 * Implementation of user image rendering.
1710 * @param old_help_icon $helpicon A help icon instance
1711 * @return string HTML fragment
1713 protected function render_old_help_icon(old_help_icon $helpicon) {
1716 // first get the help image icon
1717 $src = $this->pix_url('help');
1719 if (empty($helpicon->linktext)) {
1720 $alt = $helpicon->title;
1722 $alt = get_string('helpwiththis');
1725 $attributes = array('src'=>$src, 'alt'=>$alt, 'class'=>'iconhelp');
1726 $output = html_writer::empty_tag('img', $attributes);
1728 // add the link text if given
1729 if (!empty($helpicon->linktext)) {
1730 // the spacing has to be done through CSS
1731 $output .= $helpicon->linktext;
1734 // now create the link around it - we need https on loginhttps pages
1735 $url = new moodle_url($CFG->httpswwwroot.'/help.php', array('component' => $helpicon->component, 'identifier' => $helpicon->helpidentifier, 'lang'=>current_language()));
1737 // note: this title is displayed only if JS is disabled, otherwise the link will have the new ajax tooltip
1738 $title = get_string('helpprefix2', '', trim($helpicon->title, ". \t"));
1740 $attributes = array('href'=>$url, 'title'=>$title, 'aria-haspopup' => 'true');
1741 $id = html_writer::random_id('helpicon');
1742 $attributes['id'] = $id;
1743 $output = html_writer::tag('a', $output, $attributes);
1745 $this->page->requires->js_init_call('M.util.help_icon.add', array(array('id'=>$id, 'url'=>$url->out(false))));
1746 $this->page->requires->string_for_js('close', 'form');
1749 return html_writer::tag('span', $output, array('class' => 'helplink'));
1753 * Returns HTML to display a help icon.
1755 * @param string $identifier The keyword that defines a help page
1756 * @param string $component component name
1757 * @param string|bool $linktext true means use $title as link text, string means link text value
1758 * @return string HTML fragment
1760 public function help_icon($identifier, $component = 'moodle', $linktext = '') {
1761 $icon = new help_icon($identifier, $component);
1762 $icon->diag_strings();
1763 if ($linktext === true) {
1764 $icon->linktext = get_string($icon->identifier, $icon->component);
1765 } else if (!empty($linktext)) {
1766 $icon->linktext = $linktext;
1768 return $this->render($icon);
1772 * Implementation of user image rendering.
1774 * @param help_icon $helpicon A help icon instance
1775 * @return string HTML fragment
1777 protected function render_help_icon(help_icon $helpicon) {
1780 // first get the help image icon
1781 $src = $this->pix_url('help');
1783 $title = get_string($helpicon->identifier, $helpicon->component);
1785 if (empty($helpicon->linktext)) {
1786 $alt = get_string('helpprefix2', '', trim($title, ". \t"));
1788 $alt = get_string('helpwiththis');
1791 $attributes = array('src'=>$src, 'alt'=>$alt, 'class'=>'iconhelp');
1792 $output = html_writer::empty_tag('img', $attributes);
1794 // add the link text if given
1795 if (!empty($helpicon->linktext)) {
1796 // the spacing has to be done through CSS
1797 $output .= $helpicon->linktext;
1800 // now create the link around it - we need https on loginhttps pages
1801 $url = new moodle_url($CFG->httpswwwroot.'/help.php', array('component' => $helpicon->component, 'identifier' => $helpicon->identifier, 'lang'=>current_language()));
1803 // note: this title is displayed only if JS is disabled, otherwise the link will have the new ajax tooltip
1804 $title = get_string('helpprefix2', '', trim($title, ". \t"));
1806 $attributes = array('href'=>$url, 'title'=>$title, 'aria-haspopup' => 'true', 'class' => 'tooltip');
1807 $output = html_writer::tag('a', $output, $attributes);
1809 $this->page->requires->js_init_call('M.util.help_icon.setup');
1810 $this->page->requires->string_for_js('close', 'form');
1813 return html_writer::tag('span', $output, array('class' => 'helplink'));
1817 * Returns HTML to display a scale help icon.
1819 * @param int $courseid
1820 * @param stdClass $scale instance
1821 * @return string HTML fragment
1823 public function help_icon_scale($courseid, stdClass $scale) {
1826 $title = get_string('helpprefix2', '', $scale->name) .' ('.get_string('newwindow').')';
1828 $icon = $this->pix_icon('help', get_string('scales'), 'moodle', array('class'=>'iconhelp'));
1830 $scaleid = abs($scale->id);
1832 $link = new moodle_url('/course/scales.php', array('id' => $courseid, 'list' => true, 'scaleid' => $scaleid));
1833 $action = new popup_action('click', $link, 'ratingscale');
1835 return html_writer::tag('span', $this->action_link($link, $icon, $action), array('class' => 'helplink'));
1839 * Creates and returns a spacer image with optional line break.
1841 * @param array $attributes Any HTML attributes to add to the spaced.
1842 * @param bool $br Include a BR after the spacer.... DON'T USE THIS. Don't be
1843 * laxy do it with CSS which is a much better solution.
1844 * @return string HTML fragment
1846 public function spacer(array $attributes = null, $br = false) {
1847 $attributes = (array)$attributes;
1848 if (empty($attributes['width'])) {
1849 $attributes['width'] = 1;
1851 if (empty($attributes['height'])) {
1852 $attributes['height'] = 1;
1854 $attributes['class'] = 'spacer';
1856 $output = $this->pix_icon('spacer', '', 'moodle', $attributes);
1859 $output .= '<br />';
1866 * Returns HTML to display the specified user's avatar.
1868 * User avatar may be obtained in two ways:
1870 * // Option 1: (shortcut for simple cases, preferred way)
1871 * // $user has come from the DB and has fields id, picture, imagealt, firstname and lastname
1872 * $OUTPUT->user_picture($user, array('popup'=>true));
1875 * $userpic = new user_picture($user);
1876 * // Set properties of $userpic
1877 * $userpic->popup = true;
1878 * $OUTPUT->render($userpic);
1881 * @param stdClass $user Object with at least fields id, picture, imagealt, firstname, lastname
1882 * If any of these are missing, the database is queried. Avoid this
1883 * if at all possible, particularly for reports. It is very bad for performance.
1884 * @param array $options associative array with user picture options, used only if not a user_picture object,
1886 * - courseid=$this->page->course->id (course id of user profile in link)
1887 * - size=35 (size of image)
1888 * - link=true (make image clickable - the link leads to user profile)
1889 * - popup=false (open in popup)
1890 * - alttext=true (add image alt attribute)
1891 * - class = image class attribute (default 'userpicture')
1892 * @return string HTML fragment
1894 public function user_picture(stdClass $user, array $options = null) {
1895 $userpicture = new user_picture($user);
1896 foreach ((array)$options as $key=>$value) {
1897 if (array_key_exists($key, $userpicture)) {
1898 $userpicture->$key = $value;
1901 return $this->render($userpicture);
1905 * Internal implementation of user image rendering.
1907 * @param user_picture $userpicture
1910 protected function render_user_picture(user_picture $userpicture) {
1913 $user = $userpicture->user;
1915 if ($userpicture->alttext) {
1916 if (!empty($user->imagealt)) {
1917 $alt = $user->imagealt;
1919 $alt = get_string('pictureof', '', fullname($user));
1925 if (empty($userpicture->size)) {
1927 } else if ($userpicture->size === true or $userpicture->size == 1) {
1930 $size = $userpicture->size;
1933 $class = $userpicture->class;
1935 if ($user->picture == 0) {
1936 $class .= ' defaultuserpic';
1939 $src = $userpicture->get_url($this->page, $this);
1941 $attributes = array('src'=>$src, 'alt'=>$alt, 'title'=>$alt, 'class'=>$class, 'width'=>$size, 'height'=>$size);
1943 // get the image html output fisrt
1944 $output = html_writer::empty_tag('img', $attributes);;
1946 // then wrap it in link if needed
1947 if (!$userpicture->link) {
1951 if (empty($userpicture->courseid)) {
1952 $courseid = $this->page->course->id;
1954 $courseid = $userpicture->courseid;
1957 if ($courseid == SITEID) {
1958 $url = new moodle_url('/user/profile.php', array('id' => $user->id));
1960 $url = new moodle_url('/user/view.php', array('id' => $user->id, 'course' => $courseid));
1963 $attributes = array('href'=>$url);
1965 if ($userpicture->popup) {
1966 $id = html_writer::random_id('userpicture');
1967 $attributes['id'] = $id;
1968 $this->add_action_handler(new popup_action('click', $url), $id);
1971 return html_writer::tag('a', $output, $attributes);
1975 * Internal implementation of file tree viewer items rendering.
1980 public function htmllize_file_tree($dir) {
1981 if (empty($dir['subdirs']) and empty($dir['files'])) {
1985 foreach ($dir['subdirs'] as $subdir) {
1986 $result .= '<li>'.s($subdir['dirname']).' '.$this->htmllize_file_tree($subdir).'</li>';
1988 foreach ($dir['files'] as $file) {
1989 $filename = $file->get_filename();
1990 $result .= '<li><span>'.html_writer::link($file->fileurl, $filename).'</span></li>';
1998 * Returns HTML to display the file picker
2001 * $OUTPUT->file_picker($options);
2004 * @param array $options associative array with file manager options
2008 * client_id=>uniqid(),
2009 * acepted_types=>'*',
2010 * return_types=>FILE_INTERNAL,
2011 * context=>$PAGE->context
2012 * @return string HTML fragment
2014 public function file_picker($options) {
2015 $fp = new file_picker($options);
2016 return $this->render($fp);
2020 * Internal implementation of file picker rendering.
2022 * @param file_picker $fp
2025 public function render_file_picker(file_picker $fp) {
2026 global $CFG, $OUTPUT, $USER;
2027 $options = $fp->options;
2028 $client_id = $options->client_id;
2029 $strsaved = get_string('filesaved', 'repository');
2030 $straddfile = get_string('openpicker', 'repository');
2031 $strloading = get_string('loading', 'repository');
2032 $strdndenabled = get_string('dndenabled_inbox', 'moodle');
2033 $strdroptoupload = get_string('droptoupload', 'moodle');
2034 $icon_progress = $OUTPUT->pix_icon('i/loading_small', $strloading).'';
2036 $currentfile = $options->currentfile;
2037 if (empty($currentfile)) {
2040 $currentfile .= ' - ';
2042 if ($options->maxbytes) {
2043 $size = $options->maxbytes;
2045 $size = get_max_upload_file_size();
2050 $maxsize = get_string('maxfilesize', 'moodle', display_size($size));
2052 if ($options->buttonname) {
2053 $buttonname = ' name="' . $options->buttonname . '"';
2058 <div class="filemanager-loading mdl-align" id='filepicker-loading-{$client_id}'>
2061 <div id="filepicker-wrapper-{$client_id}" class="mdl-left" style="display:none">
2063 <input type="button" class="fp-btn-choose" id="filepicker-button-{$client_id}" value="{$straddfile}"{$buttonname}/>
2064 <span> $maxsize </span>
2067 if ($options->env != 'url') {
2069 <div id="file_info_{$client_id}" class="mdl-left filepicker-filelist" style="position: relative">
2070 <div class="filepicker-filename">
2071 <div class="filepicker-container">$currentfile<div class="dndupload-message">$strdndenabled <br/><div class="dndupload-arrow"></div></div></div>
2073 <div><div class="dndupload-target">{$strdroptoupload}<br/><div class="dndupload-arrow"></div></div></div>
2082 * Returns HTML to display the 'Update this Modulename' button that appears on module pages.
2084 * @param string $cmid the course_module id.
2085 * @param string $modulename the module name, eg. "forum", "quiz" or "workshop"
2086 * @return string the HTML for the button, if this user has permission to edit it, else an empty string.
2088 public function update_module_button($cmid, $modulename) {
2090 if (has_capability('moodle/course:manageactivities', get_context_instance(CONTEXT_MODULE, $cmid))) {
2091 $modulename = get_string('modulename', $modulename);
2092 $string = get_string('updatethis', '', $modulename);
2093 $url = new moodle_url("$CFG->wwwroot/course/mod.php", array('update' => $cmid, 'return' => true, 'sesskey' => sesskey()));
2094 return $this->single_button($url, $string);
2101 * Returns HTML to display a "Turn editing on/off" button in a form.
2103 * @param moodle_url $url The URL + params to send through when clicking the button
2104 * @return string HTML the button
2106 public function edit_button(moodle_url $url) {
2108 $url->param('sesskey', sesskey());
2109 if ($this->page->user_is_editing()) {
2110 $url->param('edit', 'off');
2111 $editstring = get_string('turneditingoff');
2113 $url->param('edit', 'on');
2114 $editstring = get_string('turneditingon');
2117 return $this->single_button($url, $editstring);
2121 * Returns HTML to display a simple button to close a window
2123 * @param string $text The lang string for the button's label (already output from get_string())
2124 * @return string html fragment
2126 public function close_window_button($text='') {
2128 $text = get_string('closewindow');
2130 $button = new single_button(new moodle_url('#'), $text, 'get');
2131 $button->add_action(new component_action('click', 'close_window'));
2133 return $this->container($this->render($button), 'closewindow');
2137 * Output an error message. By default wraps the error message in <span class="error">.
2138 * If the error message is blank, nothing is output.
2140 * @param string $message the error message.
2141 * @return string the HTML to output.
2143 public function error_text($message) {
2144 if (empty($message)) {
2147 return html_writer::tag('span', $message, array('class' => 'error'));
2151 * Do not call this function directly.
2153 * To terminate the current script with a fatal error, call the {@link print_error}
2154 * function, or throw an exception. Doing either of those things will then call this
2155 * function to display the error, before terminating the execution.
2157 * @param string $message The message to output
2158 * @param string $moreinfourl URL where more info can be found about the error
2159 * @param string $link Link for the Continue button
2160 * @param array $backtrace The execution backtrace
2161 * @param string $debuginfo Debugging information
2162 * @return string the HTML to output.
2164 public function fatal_error($message, $moreinfourl, $link, $backtrace, $debuginfo = null) {
2170 if ($this->has_started()) {
2171 // we can not always recover properly here, we have problems with output buffering,
2172 // html tables, etc.
2173 $output .= $this->opencontainers->pop_all_but_last();
2176 // It is really bad if library code throws exception when output buffering is on,
2177 // because the buffered text would be printed before our start of page.
2178 // NOTE: this hack might be behave unexpectedly in case output buffering is enabled in PHP.ini
2179 error_reporting(0); // disable notices from gzip compression, etc.
2180 while (ob_get_level() > 0) {
2181 $buff = ob_get_clean();
2182 if ($buff === false) {
2187 error_reporting($CFG->debug);
2189 // Header not yet printed
2190 if (isset($_SERVER['SERVER_PROTOCOL'])) {
2191 // server protocol should be always present, because this render
2192 // can not be used from command line or when outputting custom XML
2193 @header($_SERVER['SERVER_PROTOCOL'] . ' 404 Not Found');
2195 $this->page->set_context(null); // ugly hack - make sure page context is set to something, we do not want bogus warnings here
2196 $this->page->set_url('/'); // no url
2197 //$this->page->set_pagelayout('base'); //TODO: MDL-20676 blocks on error pages are weird, unfortunately it somehow detect the pagelayout from URL :-(
2198 $this->page->set_title(get_string('error'));
2199 $this->page->set_heading($this->page->course->fullname);
2200 $output .= $this->header();
2203 $message = '<p class="errormessage">' . $message . '</p>'.
2204 '<p class="errorcode"><a href="' . $moreinfourl . '">' .
2205 get_string('moreinformation') . '</a></p>';
2206 if (empty($CFG->rolesactive)) {
2207 $message .= '<p class="errormessage">' . get_string('installproblem', 'error') . '</p>';
2208 //It is usually not possible to recover from errors triggered during installation, you may need to create a new database or use a different database prefix for new installation.
2210 $output .= $this->box($message, 'errorbox');
2212 if (debugging('', DEBUG_DEVELOPER)) {
2213 if (!empty($debuginfo)) {
2214 $debuginfo = s($debuginfo); // removes all nasty JS
2215 $debuginfo = str_replace("\n", '<br />', $debuginfo); // keep newlines
2216 $output .= $this->notification('<strong>Debug info:</strong> '.$debuginfo, 'notifytiny');
2218 if (!empty($backtrace)) {
2219 $output .= $this->notification('<strong>Stack trace:</strong> '.format_backtrace($backtrace), 'notifytiny');
2221 if ($obbuffer !== '' ) {
2222 $output .= $this->notification('<strong>Output buffer:</strong> '.s($obbuffer), 'notifytiny');
2226 if (empty($CFG->rolesactive)) {
2227 // continue does not make much sense if moodle is not installed yet because error is most probably not recoverable
2228 } else if (!empty($link)) {
2229 $output .= $this->continue_button($link);
2232 $output .= $this->footer();
2234 // Padding to encourage IE to display our error page, rather than its own.
2235 $output .= str_repeat(' ', 512);
2241 * Output a notification (that is, a status message about something that has
2244 * @param string $message the message to print out
2245 * @param string $classes normally 'notifyproblem' or 'notifysuccess'.
2246 * @return string the HTML to output.
2248 public function notification($message, $classes = 'notifyproblem') {
2249 return html_writer::tag('div', clean_text($message), array('class' => renderer_base::prepare_classes($classes)));
2253 * Returns HTML to display a continue button that goes to a particular URL.
2255 * @param string|moodle_url $url The url the button goes to.
2256 * @return string the HTML to output.
2258 public function continue_button($url) {
2259 if (!($url instanceof moodle_url)) {
2260 $url = new moodle_url($url);
2262 $button = new single_button($url, get_string('continue'), 'get');
2263 $button->class = 'continuebutton';
2265 return $this->render($button);
2269 * Returns HTML to display a single paging bar to provide access to other pages (usually in a search)
2271 * @param int $totalcount The total number of entries available to be paged through
2272 * @param int $page The page you are currently viewing
2273 * @param int $perpage The number of entries that should be shown per page
2274 * @param string|moodle_url $baseurl url of the current page, the $pagevar parameter is added
2275 * @param string $pagevar name of page parameter that holds the page number
2276 * @return string the HTML to output.
2278 public function paging_bar($totalcount, $page, $perpage, $baseurl, $pagevar = 'page') {
2279 $pb = new paging_bar($totalcount, $page, $perpage, $baseurl, $pagevar);
2280 return $this->render($pb);
2284 * Internal implementation of paging bar rendering.
2286 * @param paging_bar $pagingbar
2289 protected function render_paging_bar(paging_bar $pagingbar) {
2291 $pagingbar = clone($pagingbar);
2292 $pagingbar->prepare($this, $this->page, $this->target);
2294 if ($pagingbar->totalcount > $pagingbar->perpage) {
2295 $output .= get_string('page') . ':';
2297 if (!empty($pagingbar->previouslink)) {
2298 $output .= ' (' . $pagingbar->previouslink . ') ';
2301 if (!empty($pagingbar->firstlink)) {
2302 $output .= ' ' . $pagingbar->firstlink . ' ...';
2305 foreach ($pagingbar->pagelinks as $link) {
2306 $output .= "  $link";
2309 if (!empty($pagingbar->lastlink)) {
2310 $output .= ' ...' . $pagingbar->lastlink . ' ';
2313 if (!empty($pagingbar->nextlink)) {
2314 $output .= '  (' . $pagingbar->nextlink . ')';
2318 return html_writer::tag('div', $output, array('class' => 'paging'));
2322 * Output the place a skip link goes to.
2324 * @param string $id The target name from the corresponding $PAGE->requires->skip_link_to($target) call.
2325 * @return string the HTML to output.
2327 public function skip_link_target($id = null) {
2328 return html_writer::tag('span', '', array('id' => $id));
2334 * @param string $text The text of the heading
2335 * @param int $level The level of importance of the heading. Defaulting to 2
2336 * @param string $classes A space-separated list of CSS classes
2337 * @param string $id An optional ID
2338 * @return string the HTML to output.
2340 public function heading($text, $level = 2, $classes = 'main', $id = null) {
2341 $level = (integer) $level;
2342 if ($level < 1 or $level > 6) {
2343 throw new coding_exception('Heading level must be an integer between 1 and 6.');
2345 return html_writer::tag('h' . $level, $text, array('id' => $id, 'class' => renderer_base::prepare_classes($classes)));
2351 * @param string $contents The contents of the box
2352 * @param string $classes A space-separated list of CSS classes
2353 * @param string $id An optional ID
2354 * @return string the HTML to output.
2356 public function box($contents, $classes = 'generalbox', $id = null) {
2357 return $this->box_start($classes, $id) . $contents . $this->box_end();
2361 * Outputs the opening section of a box.
2363 * @param string $classes A space-separated list of CSS classes
2364 * @param string $id An optional ID
2365 * @return string the HTML to output.
2367 public function box_start($classes = 'generalbox', $id = null) {
2368 $this->opencontainers->push('box', html_writer::end_tag('div'));
2369 return html_writer::start_tag('div', array('id' => $id,
2370 'class' => 'box ' . renderer_base::prepare_classes($classes)));
2374 * Outputs the closing section of a box.
2376 * @return string the HTML to output.
2378 public function box_end() {
2379 return $this->opencontainers->pop('box');
2383 * Outputs a container.
2385 * @param string $contents The contents of the box
2386 * @param string $classes A space-separated list of CSS classes
2387 * @param string $id An optional ID
2388 * @return string the HTML to output.
2390 public function container($contents, $classes = null, $id = null) {
2391 return $this->container_start($classes, $id) . $contents . $this->container_end();
2395 * Outputs the opening section of a container.
2397 * @param string $classes A space-separated list of CSS classes
2398 * @param string $id An optional ID
2399 * @return string the HTML to output.
2401 public function container_start($classes = null, $id = null) {
2402 $this->opencontainers->push('container', html_writer::end_tag('div'));
2403 return html_writer::start_tag('div', array('id' => $id,
2404 'class' => renderer_base::prepare_classes($classes)));
2408 * Outputs the closing section of a container.
2410 * @return string the HTML to output.
2412 public function container_end() {
2413 return $this->opencontainers->pop('container');
2417 * Make nested HTML lists out of the items
2419 * The resulting list will look something like this:
2423 * <<li>><div class='tree_item parent'>(item contents)</div>
2425 * <<li>><div class='tree_item'>(item contents)</div><</li>>
2431 * @param array $items
2432 * @param array $attrs html attributes passed to the top ofs the list
2433 * @return string HTML
2435 public function tree_block_contents($items, $attrs = array()) {
2436 // exit if empty, we don't want an empty ul element
2437 if (empty($items)) {
2440 // array of nested li elements
2442 foreach ($items as $item) {
2443 // this applies to the li item which contains all child lists too
2444 $content = $item->content($this);
2445 $liclasses = array($item->get_css_type());
2446 if (!$item->forceopen || (!$item->forceopen && $item->collapse) || ($item->children->count()==0 && $item->nodetype==navigation_node::NODETYPE_BRANCH)) {
2447 $liclasses[] = 'collapsed';
2449 if ($item->isactive === true) {
2450 $liclasses[] = 'current_branch';
2452 $liattr = array('class'=>join(' ',$liclasses));
2453 // class attribute on the div item which only contains the item content
2454 $divclasses = array('tree_item');
2455 if ($item->children->count()>0 || $item->nodetype==navigation_node::NODETYPE_BRANCH) {
2456 $divclasses[] = 'branch';
2458 $divclasses[] = 'leaf';
2460 if (!empty($item->classes) && count($item->classes)>0) {
2461 $divclasses[] = join(' ', $item->classes);
2463 $divattr = array('class'=>join(' ', $divclasses));
2464 if (!empty($item->id)) {
2465 $divattr['id'] = $item->id;
2467 $content = html_writer::tag('p', $content, $divattr) . $this->tree_block_contents($item->children);
2468 if (!empty($item->preceedwithhr) && $item->preceedwithhr===true) {
2469 $content = html_writer::empty_tag('hr') . $content;
2471 $content = html_writer::tag('li', $content, $liattr);
2474 return html_writer::tag('ul', implode("\n", $lis), $attrs);
2478 * Return the navbar content so that it can be echoed out by the layout
2480 * @return string XHTML navbar
2482 public function navbar() {
2483 $items = $this->page->navbar->get_items();
2485 $htmlblocks = array();
2486 // Iterate the navarray and display each node
2487 $itemcount = count($items);
2488 $separator = get_separator();
2489 for ($i=0;$i < $itemcount;$i++) {
2491 $item->hideicon = true;
2493 $content = html_writer::tag('li', $this->render($item));
2495 $content = html_writer::tag('li', $separator.$this->render($item));
2497 $htmlblocks[] = $content;
2500 //accessibility: heading for navbar list (MDL-20446)
2501 $navbarcontent = html_writer::tag('span', get_string('pagepath'), array('class'=>'accesshide'));
2502 $navbarcontent .= html_writer::tag('ul', join('', $htmlblocks));
2504 return $navbarcontent;
2508 * Renders a navigation node object.
2510 * @param navigation_node $item The navigation node to render.
2511 * @return string HTML fragment
2513 protected function render_navigation_node(navigation_node $item) {
2514 $content = $item->get_content();
2515 $title = $item->get_title();
2516 if ($item->icon instanceof renderable && !$item->hideicon) {
2517 $icon = $this->render($item->icon);
2518 $content = $icon.$content; // use CSS for spacing of icons
2520 if ($item->helpbutton !== null) {
2521 $content = trim($item->helpbutton).html_writer::tag('span', $content, array('class'=>'clearhelpbutton', 'tabindex'=>'0'));
2523 if ($content === '') {
2526 if ($item->action instanceof action_link) {
2527 $link = $item->action;
2528 if ($item->hidden) {
2529 $link->add_class('dimmed');
2531 if (!empty($content)) {
2532 // Providing there is content we will use that for the link content.
2533 $link->text = $content;
2535 $content = $this->render($link);
2536 } else if ($item->action instanceof moodle_url) {
2537 $attributes = array();
2538 if ($title !== '') {
2539 $attributes['title'] = $title;
2541 if ($item->hidden) {
2542 $attributes['class'] = 'dimmed_text';
2544 $content = html_writer::link($item->action, $content, $attributes);
2546 } else if (is_string($item->action) || empty($item->action)) {
2547 $attributes = array('tabindex'=>'0'); //add tab support to span but still maintain character stream sequence.
2548 if ($title !== '') {
2549 $attributes['title'] = $title;
2551 if ($item->hidden) {
2552 $attributes['class'] = 'dimmed_text';
2554 $content = html_writer::tag('span', $content, $attributes);
2560 * Accessibility: Right arrow-like character is
2561 * used in the breadcrumb trail, course navigation menu
2562 * (previous/next activity), calendar, and search forum block.
2563 * If the theme does not set characters, appropriate defaults
2564 * are set automatically. Please DO NOT
2565 * use < > » - these are confusing for blind users.
2569 public function rarrow() {
2570 return $this->page->theme->rarrow;
2574 * Accessibility: Right arrow-like character is
2575 * used in the breadcrumb trail, course navigation menu
2576 * (previous/next activity), calendar, and search forum block.
2577 * If the theme does not set characters, appropriate defaults
2578 * are set automatically. Please DO NOT
2579 * use < > » - these are confusing for blind users.
2583 public function larrow() {
2584 return $this->page->theme->larrow;
2588 * Returns the custom menu if one has been set
2590 * A custom menu can be configured by browsing to
2591 * Settings: Administration > Appearance > Themes > Theme settings
2592 * and then configuring the custommenu config setting as described.
2594 * @param string $custommenuitems - custom menuitems set by theme instead of global theme settings
2597 public function custom_menu($custommenuitems = '') {
2599 if (empty($custommenuitems) && !empty($CFG->custommenuitems)) {
2600 $custommenuitems = $CFG->custommenuitems;
2602 if (empty($custommenuitems)) {
2605 $custommenu = new custom_menu($custommenuitems, current_language());
2606 return $this->render_custom_menu($custommenu);
2610 * Renders a custom menu object (located in outputcomponents.php)
2612 * The custom menu this method produces makes use of the YUI3 menunav widget
2613 * and requires very specific html elements and classes.
2615 * @staticvar int $menucount
2616 * @param custom_menu $menu
2619 protected function render_custom_menu(custom_menu $menu) {
2620 static $menucount = 0;
2621 // If the menu has no children return an empty string
2622 if (!$menu->has_children()) {
2625 // Increment the menu count. This is used for ID's that get worked with
2626 // in JavaScript as is essential
2628 // Initialise this custom menu (the custom menu object is contained in javascript-static
2629 $jscode = js_writer::function_call_with_Y('M.core_custom_menu.init', array('custom_menu_'.$menucount));
2630 $jscode = "(function(){{$jscode}})";
2631 $this->page->requires->yui_module('node-menunav', $jscode);
2632 // Build the root nodes as required by YUI
2633 $content = html_writer::start_tag('div', array('id'=>'custom_menu_'.$menucount, 'class'=>'yui3-menu yui3-menu-horizontal javascript-disabled'));
2634 $content .= html_writer::start_tag('div', array('class'=>'yui3-menu-content'));
2635 $content .= html_writer::start_tag('ul');
2636 // Render each child
2637 foreach ($menu->get_children() as $item) {
2638 $content .= $this->render_custom_menu_item($item);
2640 // Close the open tags
2641 $content .= html_writer::end_tag('ul');
2642 $content .= html_writer::end_tag('div');
2643 $content .= html_writer::end_tag('div');
2644 // Return the custom menu
2649 * Renders a custom menu node as part of a submenu
2651 * The custom menu this method produces makes use of the YUI3 menunav widget
2652 * and requires very specific html elements and classes.
2654 * @see core:renderer::render_custom_menu()
2656 * @staticvar int $submenucount
2657 * @param custom_menu_item $menunode
2660 protected function render_custom_menu_item(custom_menu_item $menunode) {
2661 // Required to ensure we get unique trackable id's
2662 static $submenucount = 0;
2663 if ($menunode->has_children()) {
2664 // If the child has menus render it as a sub menu
2666 $content = html_writer::start_tag('li');
2667 if ($menunode->get_url() !== null) {
2668 $url = $menunode->get_url();
2670 $url = '#cm_submenu_'.$submenucount;
2672 $content .= html_writer::link($url, $menunode->get_text(), array('class'=>'yui3-menu-label', 'title'=>$menunode->get_title()));
2673 $content .= html_writer::start_tag('div', array('id'=>'cm_submenu_'.$submenucount, 'class'=>'yui3-menu custom_menu_submenu'));
2674 $content .= html_writer::start_tag('div', array('class'=>'yui3-menu-content'));
2675 $content .= html_writer::start_tag('ul');
2676 foreach ($menunode->get_children() as $menunode) {
2677 $content .= $this->render_custom_menu_item($menunode);
2679 $content .= html_writer::end_tag('ul');
2680 $content .= html_writer::end_tag('div');
2681 $content .= html_writer::end_tag('div');
2682 $content .= html_writer::end_tag('li');
2684 // The node doesn't have children so produce a final menuitem
2685 $content = html_writer::start_tag('li', array('class'=>'yui3-menuitem'));
2686 if ($menunode->get_url() !== null) {
2687 $url = $menunode->get_url();
2691 $content .= html_writer::link($url, $menunode->get_text(), array('class'=>'yui3-menuitem-content', 'title'=>$menunode->get_title()));
2692 $content .= html_writer::end_tag('li');
2694 // Return the sub menu
2699 * Renders theme links for switching between default and other themes.
2703 protected function theme_switch_links() {
2705 $actualdevice = get_device_type();
2706 $currentdevice = $this->page->devicetypeinuse;
2707 $switched = ($actualdevice != $currentdevice);
2709 if (!$switched && $currentdevice == 'default' && $actualdevice == 'default') {
2710 // The user is using the a default device and hasn't switched so don't shown the switch
2716 $linktext = get_string('switchdevicerecommended');
2717 $devicetype = $actualdevice;
2719 $linktext = get_string('switchdevicedefault');
2720 $devicetype = 'default';
2722 $linkurl = new moodle_url('/theme/switchdevice.php', array('url' => $this->page->url, 'device' => $devicetype, 'sesskey' => sesskey()));
2724 $content = html_writer::start_tag('div', array('id' => 'theme_switch_link'));
2725 $content .= html_writer::link($linkurl, $linktext);
2726 $content .= html_writer::end_tag('div');
2733 * A renderer that generates output for command-line scripts.
2735 * The implementation of this renderer is probably incomplete.
2737 * @copyright 2009 Tim Hunt
2738 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2743 class core_renderer_cli extends core_renderer {
2746 * Returns the page header.
2748 * @return string HTML fragment
2750 public function header() {
2751 return $this->page->heading . "\n";
2755 * Returns a template fragment representing a Heading.
2757 * @param string $text The text of the heading
2758 * @param int $level The level of importance of the heading
2759 * @param string $classes A space-separated list of CSS classes
2760 * @param string $id An optional ID
2761 * @return string A template fragment for a heading
2763 public function heading($text, $level = 2, $classes = 'main', $id = null) {
2767 return '=>' . $text;
2769 return '-->' . $text;
2776 * Returns a template fragment representing a fatal error.
2778 * @param string $message The message to output
2779 * @param string $moreinfourl URL where more info can be found about the error
2780 * @param string $link Link for the Continue button
2781 * @param array $backtrace The execution backtrace
2782 * @param string $debuginfo Debugging information
2783 * @return string A template fragment for a fatal error
2785 public function fatal_error($message, $moreinfourl, $link, $backtrace, $debuginfo = null) {
2786 $output = "!!! $message !!!\n";
2788 if (debugging('', DEBUG_DEVELOPER)) {
2789 if (!empty($debuginfo)) {
2790 $output .= $this->notification($debuginfo, 'notifytiny');
2792 if (!empty($backtrace)) {
2793 $output .= $this->notification('Stack trace: ' . format_backtrace($backtrace, true), 'notifytiny');
2801 * Returns a template fragment representing a notification.
2803 * @param string $message The message to include
2804 * @param string $classes A space-separated list of CSS classes
2805 * @return string A template fragment for a notification
2807 public function notification($message, $classes = 'notifyproblem') {
2808 $message = clean_text($message);
2809 if ($classes === 'notifysuccess') {
2810 return "++ $message ++\n";
2812 return "!! $message !!\n";
2818 * A renderer that generates output for ajax scripts.
2820 * This renderer prevents accidental sends back only json
2821 * encoded error messages, all other output is ignored.
2823 * @copyright 2010 Petr Skoda
2824 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2829 class core_renderer_ajax extends core_renderer {
2832 * Returns a template fragment representing a fatal error.
2834 * @param string $message The message to output
2835 * @param string $moreinfourl URL where more info can be found about the error
2836 * @param string $link Link for the Continue button
2837 * @param array $backtrace The execution backtrace
2838 * @param string $debuginfo Debugging information
2839 * @return string A template fragment for a fatal error
2841 public function fatal_error($message, $moreinfourl, $link, $backtrace, $debuginfo = null) {
2844 $this->page->set_context(null); // ugly hack - make sure page context is set to something, we do not want bogus warnings here
2846 $e = new stdClass();
2847 $e->error = $message;
2848 $e->stacktrace = NULL;
2849 $e->debuginfo = NULL;
2850 $e->reproductionlink = NULL;
2851 if (!empty($CFG->debug) and $CFG->debug >= DEBUG_DEVELOPER) {
2852 $e->reproductionlink = $link;
2853 if (!empty($debuginfo)) {
2854 $e->debuginfo = $debuginfo;
2856 if (!empty($backtrace)) {
2857 $e->stacktrace = format_backtrace($backtrace, true);
2861 return json_encode($e);
2865 * Used to display a notification.
2866 * For the AJAX notifications are discarded.
2868 * @param string $message
2869 * @param string $classes
2871 public function notification($message, $classes = 'notifyproblem') {}
2874 * Used to display a redirection message.
2875 * AJAX redirections should not occur and as such redirection messages
2878 * @param moodle_url|string $encodedurl
2879 * @param string $message
2881 * @param bool $debugdisableredirect
2883 public function redirect_message($encodedurl, $message, $delay, $debugdisableredirect) {}
2886 * Prepares the start of an AJAX output.
2888 public function header() {
2889 // unfortunately YUI iframe upload does not support application/json
2890 if (!empty($_FILES)) {
2891 @header('Content-type: text/plain; charset=utf-8');
2893 @header('Content-type: application/json; charset=utf-8');
2896 // Headers to make it not cacheable and json
2897 @header('Cache-Control: no-store, no-cache, must-revalidate');
2898 @header('Cache-Control: post-check=0, pre-check=0', false);
2899 @header('Pragma: no-cache');
2900 @header('Expires: Mon, 20 Aug 1969 09:23:00 GMT');
2901 @header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
2902 @header('Accept-Ranges: none');
2906 * There is no footer for an AJAX request, however we must override the
2907 * footer method to prevent the default footer.
2909 public function footer() {}
2912 * No need for headers in an AJAX request... this should never happen.
2913 * @param string $text
2915 * @param string $classes
2918 public function heading($text, $level = 2, $classes = 'main', $id = null) {}
2923 * Renderer for media files.
2925 * Used in file resources, media filter, and any other places that need to
2926 * output embedded media.
2928 * @copyright 2011 The Open University
2929 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2931 class core_media_renderer extends plugin_renderer_base {
2932 /** @var array Array of available 'player' objects */
2934 /** @var string Regex pattern for links which may contain embeddable content */
2935 private $embeddablemarkers;
2938 * Constructor requires medialib.php.
2940 * This is needed in the constructor (not later) so that you can use the
2941 * constants and static functions that are defined in core_media class
2942 * before you call renderer functions.
2944 public function __construct() {
2946 require_once($CFG->libdir . '/medialib.php');
2950 * Obtains the list of core_media_player objects currently in use to render
2953 * The list is in rank order (highest first) and does not include players
2954 * which are disabled.
2956 * @return array Array of core_media_player objects in rank order
2958 protected function get_players() {
2961 // Save time by only building the list once.
2962 if (!$this->players) {
2963 // Get raw list of players.
2964 $players = $this->get_players_raw();
2966 // Chuck all the ones that are disabled.
2967 foreach ($players as $key => $player) {
2968 if (!$player->is_enabled()) {
2969 unset($players[$key]);
2973 // Sort in rank order (highest first).
2974 usort($players, array('core_media_player', 'compare_by_rank'));
2975 $this->players = $players;
2977 return $this->players;
2981 * Obtains a raw list of player objects that includes objects regardless
2982 * of whether they are disabled or not, and without sorting.
2984 * You can override this in a subclass if you need to add additional
2987 * The return array is be indexed by player name to make it easier to
2988 * remove players in a subclass.
2990 * @return array $players Array of core_media_player objects in any order
2992 protected function get_players_raw() {
2994 'vimeo' => new core_media_player_vimeo(),
2995 'youtube' => new core_media_player_youtube(),
2996 'youtube_playlist' => new core_media_player_youtube_playlist(),
2997 'html5video' => new core_media_player_html5video(),
2998 'html5audio' => new core_media_player_html5audio(),
2999 'mp3' => new core_media_player_mp3(),
3000 'flv' => new core_media_player_flv(),
3001 'wmp' => new core_media_player_wmp(),
3002 'qt' => new core_media_player_qt(),
3003 'rm' => new core_media_player_rm(),
3004 'swf' => new core_media_player_swf(),
3005 'link' => new core_media_player_link(),
3010 * Renders a media file (audio or video) using suitable embedded player.
3012 * See embed_alternatives function for full description of parameters.
3013 * This function calls through to that one.
3015 * When using this function you can also specify width and height in the
3016 * URL by including ?d=100x100 at the end. If specified in the URL, this
3017 * will override the $width and $height parameters.
3019 * @param moodle_url $url Full URL of media file
3020 * @param string $name Optional user-readable name to display in download link
3021 * @param int $width Width in pixels (optional)
3022 * @param int $height Height in pixels (optional)
3023 * @param array $options Array of key/value pairs
3024 * @return string HTML content of embed
3026 public function embed_url(moodle_url $url, $name = '', $width = 0, $height = 0,
3027 $options = array()) {
3029 // Get width and height from URL if specified (overrides parameters in
3031 $rawurl = $url->out(false);
3032 if (preg_match('/[?#]d=([\d]{1,4}%?)x([\d]{1,4}%?)/', $rawurl, $matches)) {
3033 $width = $matches[1];
3034 $height = $matches[2];
3035 $url = new moodle_url(str_replace($matches[0], '', $rawurl));
3038 // Defer to array version of function.
3039 return $this->embed_alternatives(array($url), $name, $width, $height, $options);
3043 * Renders media files (audio or video) using suitable embedded player.
3044 * The list of URLs should be alternative versions of the same content in
3045 * multiple formats. If there is only one format it should have a single
3048 * If the media files are not in a supported format, this will give students
3049 * a download link to each format. The download link uses the filename
3050 * unless you supply the optional name parameter.
3052 * Width and height are optional. If specified, these are suggested sizes
3053 * and should be the exact values supplied by the user, if they come from
3054 * user input. These will be treated as relating to the size of the video
3055 * content, not including any player control bar.
3057 * For audio files, height will be ignored. For video files, a few formats
3058 * work if you specify only width, but in general if you specify width
3059 * you must specify height as well.
3061 * The $options array is passed through to the core_media_player classes
3062 * that render the object tag. The keys can contain values from
3063 * core_media::OPTION_xx.
3065 * @param array $alternatives Array of moodle_url to media files
3066 * @param string $name Optional user-readable name to display in download link
3067 * @param int $width Width in pixels (optional)
3068 * @param int $height Height in pixels (optional)
3069 * @param array $options Array of key/value pairs
3070 * @return string HTML content of embed
3072 public function embed_alternatives($alternatives, $name = '', $width = 0, $height = 0,
3073 $options = array()) {
3075 // Get list of player plugins (will also require the library).
3076 $players = $this->get_players();
3078 // Set up initial text which will be replaced by first player that
3079 // supports any of the formats.
3080 $out = core_media_player::PLACEHOLDER;
3082 // Loop through all players that support any of these URLs.
3083 foreach ($players as $player) {
3084 // Option: When no other player matched, don't do the default link player.
3085 if (!empty($options[core_media::OPTION_FALLBACK_TO_BLANK]) &&
3086 $player->get_rank() === 0 && $out === core_media_player::PLACEHOLDER) {
3090 $supported = $player->list_supported_urls($alternatives, $options);
3093 $text = $player->embed($supported, $name, $width, $height, $options);
3095 // Put this in place of the 'fallback' slot in the previous text.
3096 $out = str_replace(core_media_player::PLACEHOLDER, $text, $out);
3100 // Remove 'fallback' slot from final version and return it.
3101 $out = str_replace(core_media_player::PLACEHOLDER, '', $out);
3102 if (!empty($options[core_media::OPTION_BLOCK]) && $out !== '') {
3103 $out = html_writer::tag('div', $out, array('class' => 'resourcecontent'));
3109 * Checks whether a file can be embedded. If this returns true you will get
3110 * an embedded player; if this returns false, you will just get a download
3113 * This is a wrapper for can_embed_urls.
3115 * @param moodle_url $url URL of media file
3116 * @param array $options Options (same as when embedding)
3117 * @return bool True if file can be embedded
3119 public function can_embed_url(moodle_url $url, $options = array()) {
3120 return $this->can_embed_urls(array($url), $options);
3124 * Checks whether a file can be embedded. If this returns true you will get
3125 * an embedded player; if this returns false, you will just get a download
3128 * @param array $urls URL of media file and any alternatives (moodle_url)
3129 * @param array $options Options (same as when embedding)
3130 * @return bool True if file can be embedded
3132 public function can_embed_urls(array $urls, $options = array()) {
3133 // Check all players to see if any of them support it.
3134 foreach ($this->get_players() as $player) {
3135 // Link player (always last on list) doesn't count!
3136 if ($player->get_rank() <= 0) {
3139 // First player that supports it, return true.
3140 if ($player->list_supported_urls($urls, $options)) {
3148 * Obtains a list of markers that can be used in a regular expression when
3149 * searching for URLs that can be embedded by any player type.
3151 * This string is used to improve peformance of regex matching by ensuring
3152 * that the (presumably C) regex code can do a quick keyword check on the
3153 * URL part of a link to see if it matches one of these, rather than having
3154 * to go into PHP code for every single link to see if it can be embedded.
3156 * @return string String suitable for use in regex such as '(\.mp4|\.flv)'
3158 public function get_embeddable_markers() {
3159 if (empty($this->embeddablemarkers)) {
3161 foreach ($this->get_players() as $player) {
3162 foreach ($player->get_embeddable_markers() as $marker) {
3163 if ($markers !== '') {
3166 $markers .= preg_quote($marker);
3169 $this->embeddablemarkers = $markers;
3171 return $this->embeddablemarkers;