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 $ratinghtml .= $this->help_icon_scale($rating->settings->scale->courseid, $rating->settings->scale);
1647 $ratinghtml .= html_writer::end_tag('span');
1648 $ratinghtml .= html_writer::end_tag('div');
1649 $ratinghtml .= html_writer::end_tag('form');
1656 * Centered heading with attached help button (same title text)
1657 * and optional icon attached.
1659 * @param string $text A heading text
1660 * @param string $helpidentifier The keyword that defines a help page
1661 * @param string $component component name
1662 * @param string|moodle_url $icon
1663 * @param string $iconalt icon alt text
1664 * @return string HTML fragment
1666 public function heading_with_help($text, $helpidentifier, $component = 'moodle', $icon = '', $iconalt = '') {
1669 $image = $this->pix_icon($icon, $iconalt, $component, array('class'=>'icon'));
1673 if ($helpidentifier) {
1674 $help = $this->help_icon($helpidentifier, $component);
1677 return $this->heading($image.$text.$help, 2, 'main help');
1681 * Returns HTML to display a help icon.
1683 * @deprecated since Moodle 2.0
1684 * @param string $helpidentifier The keyword that defines a help page
1685 * @param string $title A descriptive text for accessibility only
1686 * @param string $component component name
1687 * @param string|bool $linktext true means use $title as link text, string means link text value
1688 * @return string HTML fragment
1690 public function old_help_icon($helpidentifier, $title, $component = 'moodle', $linktext = '') {
1691 debugging('The method old_help_icon() is deprecated, please fix the code and use help_icon() method instead', DEBUG_DEVELOPER);
1692 $icon = new old_help_icon($helpidentifier, $title, $component);
1693 if ($linktext === true) {
1694 $icon->linktext = $title;
1695 } else if (!empty($linktext)) {
1696 $icon->linktext = $linktext;
1698 return $this->render($icon);
1702 * Implementation of user image rendering.
1704 * @param old_help_icon $helpicon A help icon instance
1705 * @return string HTML fragment
1707 protected function render_old_help_icon(old_help_icon $helpicon) {
1710 // first get the help image icon
1711 $src = $this->pix_url('help');
1713 if (empty($helpicon->linktext)) {
1714 $alt = $helpicon->title;
1716 $alt = get_string('helpwiththis');
1719 $attributes = array('src'=>$src, 'alt'=>$alt, 'class'=>'iconhelp');
1720 $output = html_writer::empty_tag('img', $attributes);
1722 // add the link text if given
1723 if (!empty($helpicon->linktext)) {
1724 // the spacing has to be done through CSS
1725 $output .= $helpicon->linktext;
1728 // now create the link around it - we need https on loginhttps pages
1729 $url = new moodle_url($CFG->httpswwwroot.'/help.php', array('component' => $helpicon->component, 'identifier' => $helpicon->helpidentifier, 'lang'=>current_language()));
1731 // note: this title is displayed only if JS is disabled, otherwise the link will have the new ajax tooltip
1732 $title = get_string('helpprefix2', '', trim($helpicon->title, ". \t"));
1734 $attributes = array('href'=>$url, 'title'=>$title, 'aria-haspopup' => 'true');
1735 $id = html_writer::random_id('helpicon');
1736 $attributes['id'] = $id;
1737 $output = html_writer::tag('a', $output, $attributes);
1739 $this->page->requires->js_init_call('M.util.help_icon.add', array(array('id'=>$id, 'url'=>$url->out(false))));
1740 $this->page->requires->string_for_js('close', 'form');
1743 return html_writer::tag('span', $output, array('class' => 'helplink'));
1747 * Returns HTML to display a help icon.
1749 * @param string $identifier The keyword that defines a help page
1750 * @param string $component component name
1751 * @param string|bool $linktext true means use $title as link text, string means link text value
1752 * @return string HTML fragment
1754 public function help_icon($identifier, $component = 'moodle', $linktext = '') {
1755 $icon = new help_icon($identifier, $component);
1756 $icon->diag_strings();
1757 if ($linktext === true) {
1758 $icon->linktext = get_string($icon->identifier, $icon->component);
1759 } else if (!empty($linktext)) {
1760 $icon->linktext = $linktext;
1762 return $this->render($icon);
1766 * Implementation of user image rendering.
1768 * @param help_icon $helpicon A help icon instance
1769 * @return string HTML fragment
1771 protected function render_help_icon(help_icon $helpicon) {
1774 // first get the help image icon
1775 $src = $this->pix_url('help');
1777 $title = get_string($helpicon->identifier, $helpicon->component);
1779 if (empty($helpicon->linktext)) {
1780 $alt = get_string('helpprefix2', '', trim($title, ". \t"));
1782 $alt = get_string('helpwiththis');
1785 $attributes = array('src'=>$src, 'alt'=>$alt, 'class'=>'iconhelp');
1786 $output = html_writer::empty_tag('img', $attributes);
1788 // add the link text if given
1789 if (!empty($helpicon->linktext)) {
1790 // the spacing has to be done through CSS
1791 $output .= $helpicon->linktext;
1794 // now create the link around it - we need https on loginhttps pages
1795 $url = new moodle_url($CFG->httpswwwroot.'/help.php', array('component' => $helpicon->component, 'identifier' => $helpicon->identifier, 'lang'=>current_language()));
1797 // note: this title is displayed only if JS is disabled, otherwise the link will have the new ajax tooltip
1798 $title = get_string('helpprefix2', '', trim($title, ". \t"));
1800 $attributes = array('href'=>$url, 'title'=>$title, 'aria-haspopup' => 'true');
1801 $id = html_writer::random_id('helpicon');
1802 $attributes['id'] = $id;
1803 $output = html_writer::tag('a', $output, $attributes);
1805 $this->page->requires->js_init_call('M.util.help_icon.add', array(array('id'=>$id, 'url'=>$url->out(false))));
1806 $this->page->requires->string_for_js('close', 'form');
1809 return html_writer::tag('span', $output, array('class' => 'helplink'));
1813 * Returns HTML to display a scale help icon.
1815 * @param int $courseid
1816 * @param stdClass $scale instance
1817 * @return string HTML fragment
1819 public function help_icon_scale($courseid, stdClass $scale) {
1822 $title = get_string('helpprefix2', '', $scale->name) .' ('.get_string('newwindow').')';
1824 $icon = $this->pix_icon('help', get_string('scales'), 'moodle', array('class'=>'iconhelp'));
1826 $scaleid = abs($scale->id);
1828 $link = new moodle_url('/course/scales.php', array('id' => $courseid, 'list' => true, 'scaleid' => $scaleid));
1829 $action = new popup_action('click', $link, 'ratingscale');
1831 return html_writer::tag('span', $this->action_link($link, $icon, $action), array('class' => 'helplink'));
1835 * Creates and returns a spacer image with optional line break.
1837 * @param array $attributes Any HTML attributes to add to the spaced.
1838 * @param bool $br Include a BR after the spacer.... DON'T USE THIS. Don't be
1839 * laxy do it with CSS which is a much better solution.
1840 * @return string HTML fragment
1842 public function spacer(array $attributes = null, $br = false) {
1843 $attributes = (array)$attributes;
1844 if (empty($attributes['width'])) {
1845 $attributes['width'] = 1;
1847 if (empty($attributes['height'])) {
1848 $attributes['height'] = 1;
1850 $attributes['class'] = 'spacer';
1852 $output = $this->pix_icon('spacer', '', 'moodle', $attributes);
1855 $output .= '<br />';
1862 * Returns HTML to display the specified user's avatar.
1864 * User avatar may be obtained in two ways:
1866 * // Option 1: (shortcut for simple cases, preferred way)
1867 * // $user has come from the DB and has fields id, picture, imagealt, firstname and lastname
1868 * $OUTPUT->user_picture($user, array('popup'=>true));
1871 * $userpic = new user_picture($user);
1872 * // Set properties of $userpic
1873 * $userpic->popup = true;
1874 * $OUTPUT->render($userpic);
1877 * @param stdClass $user Object with at least fields id, picture, imagealt, firstname, lastname
1878 * If any of these are missing, the database is queried. Avoid this
1879 * if at all possible, particularly for reports. It is very bad for performance.
1880 * @param array $options associative array with user picture options, used only if not a user_picture object,
1882 * - courseid=$this->page->course->id (course id of user profile in link)
1883 * - size=35 (size of image)
1884 * - link=true (make image clickable - the link leads to user profile)
1885 * - popup=false (open in popup)
1886 * - alttext=true (add image alt attribute)
1887 * - class = image class attribute (default 'userpicture')
1888 * @return string HTML fragment
1890 public function user_picture(stdClass $user, array $options = null) {
1891 $userpicture = new user_picture($user);
1892 foreach ((array)$options as $key=>$value) {
1893 if (array_key_exists($key, $userpicture)) {
1894 $userpicture->$key = $value;
1897 return $this->render($userpicture);
1901 * Internal implementation of user image rendering.
1903 * @param user_picture $userpicture
1906 protected function render_user_picture(user_picture $userpicture) {
1909 $user = $userpicture->user;
1911 if ($userpicture->alttext) {
1912 if (!empty($user->imagealt)) {
1913 $alt = $user->imagealt;
1915 $alt = get_string('pictureof', '', fullname($user));
1921 if (empty($userpicture->size)) {
1923 } else if ($userpicture->size === true or $userpicture->size == 1) {
1926 $size = $userpicture->size;
1929 $class = $userpicture->class;
1931 if ($user->picture == 0) {
1932 $class .= ' defaultuserpic';
1935 $src = $userpicture->get_url($this->page, $this);
1937 $attributes = array('src'=>$src, 'alt'=>$alt, 'title'=>$alt, 'class'=>$class, 'width'=>$size, 'height'=>$size);
1939 // get the image html output fisrt
1940 $output = html_writer::empty_tag('img', $attributes);;
1942 // then wrap it in link if needed
1943 if (!$userpicture->link) {
1947 if (empty($userpicture->courseid)) {
1948 $courseid = $this->page->course->id;
1950 $courseid = $userpicture->courseid;
1953 if ($courseid == SITEID) {
1954 $url = new moodle_url('/user/profile.php', array('id' => $user->id));
1956 $url = new moodle_url('/user/view.php', array('id' => $user->id, 'course' => $courseid));
1959 $attributes = array('href'=>$url);
1961 if ($userpicture->popup) {
1962 $id = html_writer::random_id('userpicture');
1963 $attributes['id'] = $id;
1964 $this->add_action_handler(new popup_action('click', $url), $id);
1967 return html_writer::tag('a', $output, $attributes);
1971 * Internal implementation of file tree viewer items rendering.
1976 public function htmllize_file_tree($dir) {
1977 if (empty($dir['subdirs']) and empty($dir['files'])) {
1981 foreach ($dir['subdirs'] as $subdir) {
1982 $result .= '<li>'.s($subdir['dirname']).' '.$this->htmllize_file_tree($subdir).'</li>';
1984 foreach ($dir['files'] as $file) {
1985 $filename = $file->get_filename();
1986 $result .= '<li><span>'.html_writer::link($file->fileurl, $filename).'</span></li>';
1994 * Returns HTML to display the file picker
1997 * $OUTPUT->file_picker($options);
2000 * @param array $options associative array with file manager options
2004 * client_id=>uniqid(),
2005 * acepted_types=>'*',
2006 * return_types=>FILE_INTERNAL,
2007 * context=>$PAGE->context
2008 * @return string HTML fragment
2010 public function file_picker($options) {
2011 $fp = new file_picker($options);
2012 return $this->render($fp);
2016 * Internal implementation of file picker rendering.
2018 * @param file_picker $fp
2021 public function render_file_picker(file_picker $fp) {
2022 global $CFG, $OUTPUT, $USER;
2023 $options = $fp->options;
2024 $client_id = $options->client_id;
2025 $strsaved = get_string('filesaved', 'repository');
2026 $straddfile = get_string('openpicker', 'repository');
2027 $strloading = get_string('loading', 'repository');
2028 $strdndenabled = get_string('dndenabled_inbox', 'moodle');
2029 $strdroptoupload = get_string('droptoupload', 'moodle');
2030 $icon_progress = $OUTPUT->pix_icon('i/loading_small', $strloading).'';
2032 $currentfile = $options->currentfile;
2033 if (empty($currentfile)) {
2036 $currentfile .= ' - ';
2038 if ($options->maxbytes) {
2039 $size = $options->maxbytes;
2041 $size = get_max_upload_file_size();
2046 $maxsize = get_string('maxfilesize', 'moodle', display_size($size));
2048 if ($options->buttonname) {
2049 $buttonname = ' name="' . $options->buttonname . '"';
2054 <div class="filemanager-loading mdl-align" id='filepicker-loading-{$client_id}'>
2057 <div id="filepicker-wrapper-{$client_id}" class="mdl-left" style="display:none">
2059 <input type="button" class="fp-btn-choose" id="filepicker-button-{$client_id}" value="{$straddfile}"{$buttonname}/>
2060 <span> $maxsize </span>
2063 if ($options->env != 'url') {
2065 <div id="file_info_{$client_id}" class="mdl-left filepicker-filelist" style="position: relative">
2066 <div class="filepicker-filename">
2067 <div class="filepicker-container">$currentfile<span class="dndupload-message">$strdndenabled <br/><span class="dndupload-arrow"></span></span></div>
2069 <div><div class="dndupload-target">{$strdroptoupload}<br/><span class="dndupload-arrow"></span></div></div>
2078 * Returns HTML to display the 'Update this Modulename' button that appears on module pages.
2080 * @param string $cmid the course_module id.
2081 * @param string $modulename the module name, eg. "forum", "quiz" or "workshop"
2082 * @return string the HTML for the button, if this user has permission to edit it, else an empty string.
2084 public function update_module_button($cmid, $modulename) {
2086 if (has_capability('moodle/course:manageactivities', get_context_instance(CONTEXT_MODULE, $cmid))) {
2087 $modulename = get_string('modulename', $modulename);
2088 $string = get_string('updatethis', '', $modulename);
2089 $url = new moodle_url("$CFG->wwwroot/course/mod.php", array('update' => $cmid, 'return' => true, 'sesskey' => sesskey()));
2090 return $this->single_button($url, $string);
2097 * Returns HTML to display a "Turn editing on/off" button in a form.
2099 * @param moodle_url $url The URL + params to send through when clicking the button
2100 * @return string HTML the button
2102 public function edit_button(moodle_url $url) {
2104 $url->param('sesskey', sesskey());
2105 if ($this->page->user_is_editing()) {
2106 $url->param('edit', 'off');
2107 $editstring = get_string('turneditingoff');
2109 $url->param('edit', 'on');
2110 $editstring = get_string('turneditingon');
2113 return $this->single_button($url, $editstring);
2117 * Returns HTML to display a simple button to close a window
2119 * @param string $text The lang string for the button's label (already output from get_string())
2120 * @return string html fragment
2122 public function close_window_button($text='') {
2124 $text = get_string('closewindow');
2126 $button = new single_button(new moodle_url('#'), $text, 'get');
2127 $button->add_action(new component_action('click', 'close_window'));
2129 return $this->container($this->render($button), 'closewindow');
2133 * Output an error message. By default wraps the error message in <span class="error">.
2134 * If the error message is blank, nothing is output.
2136 * @param string $message the error message.
2137 * @return string the HTML to output.
2139 public function error_text($message) {
2140 if (empty($message)) {
2143 return html_writer::tag('span', $message, array('class' => 'error'));
2147 * Do not call this function directly.
2149 * To terminate the current script with a fatal error, call the {@link print_error}
2150 * function, or throw an exception. Doing either of those things will then call this
2151 * function to display the error, before terminating the execution.
2153 * @param string $message The message to output
2154 * @param string $moreinfourl URL where more info can be found about the error
2155 * @param string $link Link for the Continue button
2156 * @param array $backtrace The execution backtrace
2157 * @param string $debuginfo Debugging information
2158 * @return string the HTML to output.
2160 public function fatal_error($message, $moreinfourl, $link, $backtrace, $debuginfo = null) {
2166 if ($this->has_started()) {
2167 // we can not always recover properly here, we have problems with output buffering,
2168 // html tables, etc.
2169 $output .= $this->opencontainers->pop_all_but_last();
2172 // It is really bad if library code throws exception when output buffering is on,
2173 // because the buffered text would be printed before our start of page.
2174 // NOTE: this hack might be behave unexpectedly in case output buffering is enabled in PHP.ini
2175 error_reporting(0); // disable notices from gzip compression, etc.
2176 while (ob_get_level() > 0) {
2177 $buff = ob_get_clean();
2178 if ($buff === false) {
2183 error_reporting($CFG->debug);
2185 // Header not yet printed
2186 if (isset($_SERVER['SERVER_PROTOCOL'])) {
2187 // server protocol should be always present, because this render
2188 // can not be used from command line or when outputting custom XML
2189 @header($_SERVER['SERVER_PROTOCOL'] . ' 404 Not Found');
2191 $this->page->set_context(null); // ugly hack - make sure page context is set to something, we do not want bogus warnings here
2192 $this->page->set_url('/'); // no url
2193 //$this->page->set_pagelayout('base'); //TODO: MDL-20676 blocks on error pages are weird, unfortunately it somehow detect the pagelayout from URL :-(
2194 $this->page->set_title(get_string('error'));
2195 $this->page->set_heading($this->page->course->fullname);
2196 $output .= $this->header();
2199 $message = '<p class="errormessage">' . $message . '</p>'.
2200 '<p class="errorcode"><a href="' . $moreinfourl . '">' .
2201 get_string('moreinformation') . '</a></p>';
2202 if (empty($CFG->rolesactive)) {
2203 $message .= '<p class="errormessage">' . get_string('installproblem', 'error') . '</p>';
2204 //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.
2206 $output .= $this->box($message, 'errorbox');
2208 if (debugging('', DEBUG_DEVELOPER)) {
2209 if (!empty($debuginfo)) {
2210 $debuginfo = s($debuginfo); // removes all nasty JS
2211 $debuginfo = str_replace("\n", '<br />', $debuginfo); // keep newlines
2212 $output .= $this->notification('<strong>Debug info:</strong> '.$debuginfo, 'notifytiny');
2214 if (!empty($backtrace)) {
2215 $output .= $this->notification('<strong>Stack trace:</strong> '.format_backtrace($backtrace), 'notifytiny');
2217 if ($obbuffer !== '' ) {
2218 $output .= $this->notification('<strong>Output buffer:</strong> '.s($obbuffer), 'notifytiny');
2222 if (empty($CFG->rolesactive)) {
2223 // continue does not make much sense if moodle is not installed yet because error is most probably not recoverable
2224 } else if (!empty($link)) {
2225 $output .= $this->continue_button($link);
2228 $output .= $this->footer();
2230 // Padding to encourage IE to display our error page, rather than its own.
2231 $output .= str_repeat(' ', 512);
2237 * Output a notification (that is, a status message about something that has
2240 * @param string $message the message to print out
2241 * @param string $classes normally 'notifyproblem' or 'notifysuccess'.
2242 * @return string the HTML to output.
2244 public function notification($message, $classes = 'notifyproblem') {
2245 return html_writer::tag('div', clean_text($message), array('class' => renderer_base::prepare_classes($classes)));
2249 * Returns HTML to display a continue button that goes to a particular URL.
2251 * @param string|moodle_url $url The url the button goes to.
2252 * @return string the HTML to output.
2254 public function continue_button($url) {
2255 if (!($url instanceof moodle_url)) {
2256 $url = new moodle_url($url);
2258 $button = new single_button($url, get_string('continue'), 'get');
2259 $button->class = 'continuebutton';
2261 return $this->render($button);
2265 * Returns HTML to display a single paging bar to provide access to other pages (usually in a search)
2267 * @param int $totalcount The total number of entries available to be paged through
2268 * @param int $page The page you are currently viewing
2269 * @param int $perpage The number of entries that should be shown per page
2270 * @param string|moodle_url $baseurl url of the current page, the $pagevar parameter is added
2271 * @param string $pagevar name of page parameter that holds the page number
2272 * @return string the HTML to output.
2274 public function paging_bar($totalcount, $page, $perpage, $baseurl, $pagevar = 'page') {
2275 $pb = new paging_bar($totalcount, $page, $perpage, $baseurl, $pagevar);
2276 return $this->render($pb);
2280 * Internal implementation of paging bar rendering.
2282 * @param paging_bar $pagingbar
2285 protected function render_paging_bar(paging_bar $pagingbar) {
2287 $pagingbar = clone($pagingbar);
2288 $pagingbar->prepare($this, $this->page, $this->target);
2290 if ($pagingbar->totalcount > $pagingbar->perpage) {
2291 $output .= get_string('page') . ':';
2293 if (!empty($pagingbar->previouslink)) {
2294 $output .= ' (' . $pagingbar->previouslink . ') ';
2297 if (!empty($pagingbar->firstlink)) {
2298 $output .= ' ' . $pagingbar->firstlink . ' ...';
2301 foreach ($pagingbar->pagelinks as $link) {
2302 $output .= "  $link";
2305 if (!empty($pagingbar->lastlink)) {
2306 $output .= ' ...' . $pagingbar->lastlink . ' ';
2309 if (!empty($pagingbar->nextlink)) {
2310 $output .= '  (' . $pagingbar->nextlink . ')';
2314 return html_writer::tag('div', $output, array('class' => 'paging'));
2318 * Output the place a skip link goes to.
2320 * @param string $id The target name from the corresponding $PAGE->requires->skip_link_to($target) call.
2321 * @return string the HTML to output.
2323 public function skip_link_target($id = null) {
2324 return html_writer::tag('span', '', array('id' => $id));
2330 * @param string $text The text of the heading
2331 * @param int $level The level of importance of the heading. Defaulting to 2
2332 * @param string $classes A space-separated list of CSS classes
2333 * @param string $id An optional ID
2334 * @return string the HTML to output.
2336 public function heading($text, $level = 2, $classes = 'main', $id = null) {
2337 $level = (integer) $level;
2338 if ($level < 1 or $level > 6) {
2339 throw new coding_exception('Heading level must be an integer between 1 and 6.');
2341 return html_writer::tag('h' . $level, $text, array('id' => $id, 'class' => renderer_base::prepare_classes($classes)));
2347 * @param string $contents The contents of the box
2348 * @param string $classes A space-separated list of CSS classes
2349 * @param string $id An optional ID
2350 * @return string the HTML to output.
2352 public function box($contents, $classes = 'generalbox', $id = null) {
2353 return $this->box_start($classes, $id) . $contents . $this->box_end();
2357 * Outputs the opening section of a box.
2359 * @param string $classes A space-separated list of CSS classes
2360 * @param string $id An optional ID
2361 * @return string the HTML to output.
2363 public function box_start($classes = 'generalbox', $id = null) {
2364 $this->opencontainers->push('box', html_writer::end_tag('div'));
2365 return html_writer::start_tag('div', array('id' => $id,
2366 'class' => 'box ' . renderer_base::prepare_classes($classes)));
2370 * Outputs the closing section of a box.
2372 * @return string the HTML to output.
2374 public function box_end() {
2375 return $this->opencontainers->pop('box');
2379 * Outputs a container.
2381 * @param string $contents The contents of the box
2382 * @param string $classes A space-separated list of CSS classes
2383 * @param string $id An optional ID
2384 * @return string the HTML to output.
2386 public function container($contents, $classes = null, $id = null) {
2387 return $this->container_start($classes, $id) . $contents . $this->container_end();
2391 * Outputs the opening section of a container.
2393 * @param string $classes A space-separated list of CSS classes
2394 * @param string $id An optional ID
2395 * @return string the HTML to output.
2397 public function container_start($classes = null, $id = null) {
2398 $this->opencontainers->push('container', html_writer::end_tag('div'));
2399 return html_writer::start_tag('div', array('id' => $id,
2400 'class' => renderer_base::prepare_classes($classes)));
2404 * Outputs the closing section of a container.
2406 * @return string the HTML to output.
2408 public function container_end() {
2409 return $this->opencontainers->pop('container');
2413 * Make nested HTML lists out of the items
2415 * The resulting list will look something like this:
2419 * <<li>><div class='tree_item parent'>(item contents)</div>
2421 * <<li>><div class='tree_item'>(item contents)</div><</li>>
2427 * @param array $items
2428 * @param array $attrs html attributes passed to the top ofs the list
2429 * @return string HTML
2431 public function tree_block_contents($items, $attrs = array()) {
2432 // exit if empty, we don't want an empty ul element
2433 if (empty($items)) {
2436 // array of nested li elements
2438 foreach ($items as $item) {
2439 // this applies to the li item which contains all child lists too
2440 $content = $item->content($this);
2441 $liclasses = array($item->get_css_type());
2442 if (!$item->forceopen || (!$item->forceopen && $item->collapse) || ($item->children->count()==0 && $item->nodetype==navigation_node::NODETYPE_BRANCH)) {
2443 $liclasses[] = 'collapsed';
2445 if ($item->isactive === true) {
2446 $liclasses[] = 'current_branch';
2448 $liattr = array('class'=>join(' ',$liclasses));
2449 // class attribute on the div item which only contains the item content
2450 $divclasses = array('tree_item');
2451 if ($item->children->count()>0 || $item->nodetype==navigation_node::NODETYPE_BRANCH) {
2452 $divclasses[] = 'branch';
2454 $divclasses[] = 'leaf';
2456 if (!empty($item->classes) && count($item->classes)>0) {
2457 $divclasses[] = join(' ', $item->classes);
2459 $divattr = array('class'=>join(' ', $divclasses));
2460 if (!empty($item->id)) {
2461 $divattr['id'] = $item->id;
2463 $content = html_writer::tag('p', $content, $divattr) . $this->tree_block_contents($item->children);
2464 if (!empty($item->preceedwithhr) && $item->preceedwithhr===true) {
2465 $content = html_writer::empty_tag('hr') . $content;
2467 $content = html_writer::tag('li', $content, $liattr);
2470 return html_writer::tag('ul', implode("\n", $lis), $attrs);
2474 * Return the navbar content so that it can be echoed out by the layout
2476 * @return string XHTML navbar
2478 public function navbar() {
2479 $items = $this->page->navbar->get_items();
2481 $htmlblocks = array();
2482 // Iterate the navarray and display each node
2483 $itemcount = count($items);
2484 $separator = get_separator();
2485 for ($i=0;$i < $itemcount;$i++) {
2487 $item->hideicon = true;
2489 $content = html_writer::tag('li', $this->render($item));
2491 $content = html_writer::tag('li', $separator.$this->render($item));
2493 $htmlblocks[] = $content;
2496 //accessibility: heading for navbar list (MDL-20446)
2497 $navbarcontent = html_writer::tag('span', get_string('pagepath'), array('class'=>'accesshide'));
2498 $navbarcontent .= html_writer::tag('ul', join('', $htmlblocks));
2500 return $navbarcontent;
2504 * Renders a navigation node object.
2506 * @param navigation_node $item The navigation node to render.
2507 * @return string HTML fragment
2509 protected function render_navigation_node(navigation_node $item) {
2510 $content = $item->get_content();
2511 $title = $item->get_title();
2512 if ($item->icon instanceof renderable && !$item->hideicon) {
2513 $icon = $this->render($item->icon);
2514 $content = $icon.$content; // use CSS for spacing of icons
2516 if ($item->helpbutton !== null) {
2517 $content = trim($item->helpbutton).html_writer::tag('span', $content, array('class'=>'clearhelpbutton', 'tabindex'=>'0'));
2519 if ($content === '') {
2522 if ($item->action instanceof action_link) {
2523 $link = $item->action;
2524 if ($item->hidden) {
2525 $link->add_class('dimmed');
2527 if (!empty($content)) {
2528 // Providing there is content we will use that for the link content.
2529 $link->text = $content;
2531 $content = $this->render($link);
2532 } else if ($item->action instanceof moodle_url) {
2533 $attributes = array();
2534 if ($title !== '') {
2535 $attributes['title'] = $title;
2537 if ($item->hidden) {
2538 $attributes['class'] = 'dimmed_text';
2540 $content = html_writer::link($item->action, $content, $attributes);
2542 } else if (is_string($item->action) || empty($item->action)) {
2543 $attributes = array('tabindex'=>'0'); //add tab support to span but still maintain character stream sequence.
2544 if ($title !== '') {
2545 $attributes['title'] = $title;
2547 if ($item->hidden) {
2548 $attributes['class'] = 'dimmed_text';
2550 $content = html_writer::tag('span', $content, $attributes);
2556 * Accessibility: Right arrow-like character is
2557 * used in the breadcrumb trail, course navigation menu
2558 * (previous/next activity), calendar, and search forum block.
2559 * If the theme does not set characters, appropriate defaults
2560 * are set automatically. Please DO NOT
2561 * use < > » - these are confusing for blind users.
2565 public function rarrow() {
2566 return $this->page->theme->rarrow;
2570 * Accessibility: Right arrow-like character is
2571 * used in the breadcrumb trail, course navigation menu
2572 * (previous/next activity), calendar, and search forum block.
2573 * If the theme does not set characters, appropriate defaults
2574 * are set automatically. Please DO NOT
2575 * use < > » - these are confusing for blind users.
2579 public function larrow() {
2580 return $this->page->theme->larrow;
2584 * Returns the custom menu if one has been set
2586 * A custom menu can be configured by browsing to
2587 * Settings: Administration > Appearance > Themes > Theme settings
2588 * and then configuring the custommenu config setting as described.
2590 * @param string $custommenuitems - custom menuitems set by theme instead of global theme settings
2593 public function custom_menu($custommenuitems = '') {
2595 if (empty($custommenuitems) && !empty($CFG->custommenuitems)) {
2596 $custommenuitems = $CFG->custommenuitems;
2598 if (empty($custommenuitems)) {
2601 $custommenu = new custom_menu($custommenuitems, current_language());
2602 return $this->render_custom_menu($custommenu);
2606 * Renders a custom menu object (located in outputcomponents.php)
2608 * The custom menu this method produces makes use of the YUI3 menunav widget
2609 * and requires very specific html elements and classes.
2611 * @staticvar int $menucount
2612 * @param custom_menu $menu
2615 protected function render_custom_menu(custom_menu $menu) {
2616 static $menucount = 0;
2617 // If the menu has no children return an empty string
2618 if (!$menu->has_children()) {
2621 // Increment the menu count. This is used for ID's that get worked with
2622 // in JavaScript as is essential
2624 // Initialise this custom menu (the custom menu object is contained in javascript-static
2625 $jscode = js_writer::function_call_with_Y('M.core_custom_menu.init', array('custom_menu_'.$menucount));
2626 $jscode = "(function(){{$jscode}})";
2627 $this->page->requires->yui_module('node-menunav', $jscode);
2628 // Build the root nodes as required by YUI
2629 $content = html_writer::start_tag('div', array('id'=>'custom_menu_'.$menucount, 'class'=>'yui3-menu yui3-menu-horizontal javascript-disabled'));
2630 $content .= html_writer::start_tag('div', array('class'=>'yui3-menu-content'));
2631 $content .= html_writer::start_tag('ul');
2632 // Render each child
2633 foreach ($menu->get_children() as $item) {
2634 $content .= $this->render_custom_menu_item($item);
2636 // Close the open tags
2637 $content .= html_writer::end_tag('ul');
2638 $content .= html_writer::end_tag('div');
2639 $content .= html_writer::end_tag('div');
2640 // Return the custom menu
2645 * Renders a custom menu node as part of a submenu
2647 * The custom menu this method produces makes use of the YUI3 menunav widget
2648 * and requires very specific html elements and classes.
2650 * @see core:renderer::render_custom_menu()
2652 * @staticvar int $submenucount
2653 * @param custom_menu_item $menunode
2656 protected function render_custom_menu_item(custom_menu_item $menunode) {
2657 // Required to ensure we get unique trackable id's
2658 static $submenucount = 0;
2659 if ($menunode->has_children()) {
2660 // If the child has menus render it as a sub menu
2662 $content = html_writer::start_tag('li');
2663 if ($menunode->get_url() !== null) {
2664 $url = $menunode->get_url();
2666 $url = '#cm_submenu_'.$submenucount;
2668 $content .= html_writer::link($url, $menunode->get_text(), array('class'=>'yui3-menu-label', 'title'=>$menunode->get_title()));
2669 $content .= html_writer::start_tag('div', array('id'=>'cm_submenu_'.$submenucount, 'class'=>'yui3-menu custom_menu_submenu'));
2670 $content .= html_writer::start_tag('div', array('class'=>'yui3-menu-content'));
2671 $content .= html_writer::start_tag('ul');
2672 foreach ($menunode->get_children() as $menunode) {
2673 $content .= $this->render_custom_menu_item($menunode);
2675 $content .= html_writer::end_tag('ul');
2676 $content .= html_writer::end_tag('div');
2677 $content .= html_writer::end_tag('div');
2678 $content .= html_writer::end_tag('li');
2680 // The node doesn't have children so produce a final menuitem
2681 $content = html_writer::start_tag('li', array('class'=>'yui3-menuitem'));
2682 if ($menunode->get_url() !== null) {
2683 $url = $menunode->get_url();
2687 $content .= html_writer::link($url, $menunode->get_text(), array('class'=>'yui3-menuitem-content', 'title'=>$menunode->get_title()));
2688 $content .= html_writer::end_tag('li');
2690 // Return the sub menu
2695 * Renders theme links for switching between default and other themes.
2699 protected function theme_switch_links() {
2701 $actualdevice = get_device_type();
2702 $currentdevice = $this->page->devicetypeinuse;
2703 $switched = ($actualdevice != $currentdevice);
2705 if (!$switched && $currentdevice == 'default' && $actualdevice == 'default') {
2706 // The user is using the a default device and hasn't switched so don't shown the switch
2712 $linktext = get_string('switchdevicerecommended');
2713 $devicetype = $actualdevice;
2715 $linktext = get_string('switchdevicedefault');
2716 $devicetype = 'default';
2718 $linkurl = new moodle_url('/theme/switchdevice.php', array('url' => $this->page->url, 'device' => $devicetype, 'sesskey' => sesskey()));
2720 $content = html_writer::start_tag('div', array('id' => 'theme_switch_link'));
2721 $content .= html_writer::link($linkurl, $linktext);
2722 $content .= html_writer::end_tag('div');
2729 * A renderer that generates output for command-line scripts.
2731 * The implementation of this renderer is probably incomplete.
2733 * @copyright 2009 Tim Hunt
2734 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2739 class core_renderer_cli extends core_renderer {
2742 * Returns the page header.
2744 * @return string HTML fragment
2746 public function header() {
2747 return $this->page->heading . "\n";
2751 * Returns a template fragment representing a Heading.
2753 * @param string $text The text of the heading
2754 * @param int $level The level of importance of the heading
2755 * @param string $classes A space-separated list of CSS classes
2756 * @param string $id An optional ID
2757 * @return string A template fragment for a heading
2759 public function heading($text, $level = 2, $classes = 'main', $id = null) {
2763 return '=>' . $text;
2765 return '-->' . $text;
2772 * Returns a template fragment representing a fatal error.
2774 * @param string $message The message to output
2775 * @param string $moreinfourl URL where more info can be found about the error
2776 * @param string $link Link for the Continue button
2777 * @param array $backtrace The execution backtrace
2778 * @param string $debuginfo Debugging information
2779 * @return string A template fragment for a fatal error
2781 public function fatal_error($message, $moreinfourl, $link, $backtrace, $debuginfo = null) {
2782 $output = "!!! $message !!!\n";
2784 if (debugging('', DEBUG_DEVELOPER)) {
2785 if (!empty($debuginfo)) {
2786 $output .= $this->notification($debuginfo, 'notifytiny');
2788 if (!empty($backtrace)) {
2789 $output .= $this->notification('Stack trace: ' . format_backtrace($backtrace, true), 'notifytiny');
2797 * Returns a template fragment representing a notification.
2799 * @param string $message The message to include
2800 * @param string $classes A space-separated list of CSS classes
2801 * @return string A template fragment for a notification
2803 public function notification($message, $classes = 'notifyproblem') {
2804 $message = clean_text($message);
2805 if ($classes === 'notifysuccess') {
2806 return "++ $message ++\n";
2808 return "!! $message !!\n";
2814 * A renderer that generates output for ajax scripts.
2816 * This renderer prevents accidental sends back only json
2817 * encoded error messages, all other output is ignored.
2819 * @copyright 2010 Petr Skoda
2820 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2825 class core_renderer_ajax extends core_renderer {
2828 * Returns a template fragment representing a fatal error.
2830 * @param string $message The message to output
2831 * @param string $moreinfourl URL where more info can be found about the error
2832 * @param string $link Link for the Continue button
2833 * @param array $backtrace The execution backtrace
2834 * @param string $debuginfo Debugging information
2835 * @return string A template fragment for a fatal error
2837 public function fatal_error($message, $moreinfourl, $link, $backtrace, $debuginfo = null) {
2840 $this->page->set_context(null); // ugly hack - make sure page context is set to something, we do not want bogus warnings here
2842 $e = new stdClass();
2843 $e->error = $message;
2844 $e->stacktrace = NULL;
2845 $e->debuginfo = NULL;
2846 $e->reproductionlink = NULL;
2847 if (!empty($CFG->debug) and $CFG->debug >= DEBUG_DEVELOPER) {
2848 $e->reproductionlink = $link;
2849 if (!empty($debuginfo)) {
2850 $e->debuginfo = $debuginfo;
2852 if (!empty($backtrace)) {
2853 $e->stacktrace = format_backtrace($backtrace, true);
2857 return json_encode($e);
2861 * Used to display a notification.
2862 * For the AJAX notifications are discarded.
2864 * @param string $message
2865 * @param string $classes
2867 public function notification($message, $classes = 'notifyproblem') {}
2870 * Used to display a redirection message.
2871 * AJAX redirections should not occur and as such redirection messages
2874 * @param moodle_url|string $encodedurl
2875 * @param string $message
2877 * @param bool $debugdisableredirect
2879 public function redirect_message($encodedurl, $message, $delay, $debugdisableredirect) {}
2882 * Prepares the start of an AJAX output.
2884 public function header() {
2885 // unfortunately YUI iframe upload does not support application/json
2886 if (!empty($_FILES)) {
2887 @header('Content-type: text/plain; charset=utf-8');
2889 @header('Content-type: application/json; charset=utf-8');
2892 // Headers to make it not cacheable and json
2893 @header('Cache-Control: no-store, no-cache, must-revalidate');
2894 @header('Cache-Control: post-check=0, pre-check=0', false);
2895 @header('Pragma: no-cache');
2896 @header('Expires: Mon, 20 Aug 1969 09:23:00 GMT');
2897 @header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
2898 @header('Accept-Ranges: none');
2902 * There is no footer for an AJAX request, however we must override the
2903 * footer method to prevent the default footer.
2905 public function footer() {}
2908 * No need for headers in an AJAX request... this should never happen.
2909 * @param string $text
2911 * @param string $classes
2914 public function heading($text, $level = 2, $classes = 'main', $id = null) {}
2919 * Renderer for media files.
2921 * Used in file resources, media filter, and any other places that need to
2922 * output embedded media.
2924 * @copyright 2011 The Open University
2925 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2927 class core_media_renderer extends plugin_renderer_base {
2928 /** @var array Array of available 'player' objects */
2930 /** @var string Regex pattern for links which may contain embeddable content */
2931 private $embeddablemarkers;
2934 * Constructor requires medialib.php.
2936 * This is needed in the constructor (not later) so that you can use the
2937 * constants and static functions that are defined in core_media class
2938 * before you call renderer functions.
2940 public function __construct() {
2942 require_once($CFG->libdir . '/medialib.php');
2946 * Obtains the list of core_media_player objects currently in use to render
2949 * The list is in rank order (highest first) and does not include players
2950 * which are disabled.
2952 * @return array Array of core_media_player objects in rank order
2954 protected function get_players() {
2957 // Save time by only building the list once.
2958 if (!$this->players) {
2959 // Get raw list of players.
2960 $players = $this->get_players_raw();
2962 // Chuck all the ones that are disabled.
2963 foreach ($players as $key => $player) {
2964 if (!$player->is_enabled()) {
2965 unset($players[$key]);
2969 // Sort in rank order (highest first).
2970 usort($players, array('core_media_player', 'compare_by_rank'));
2971 $this->players = $players;
2973 return $this->players;
2977 * Obtains a raw list of player objects that includes objects regardless
2978 * of whether they are disabled or not, and without sorting.
2980 * You can override this in a subclass if you need to add additional
2983 * The return array is be indexed by player name to make it easier to
2984 * remove players in a subclass.
2986 * @return array $players Array of core_media_player objects in any order
2988 protected function get_players_raw() {
2990 'vimeo' => new core_media_player_vimeo(),
2991 'youtube' => new core_media_player_youtube(),
2992 'youtube_playlist' => new core_media_player_youtube_playlist(),
2993 'html5video' => new core_media_player_html5video(),
2994 'html5audio' => new core_media_player_html5audio(),
2995 'mp3' => new core_media_player_mp3(),
2996 'flv' => new core_media_player_flv(),
2997 'wmp' => new core_media_player_wmp(),
2998 'qt' => new core_media_player_qt(),
2999 'rm' => new core_media_player_rm(),
3000 'swf' => new core_media_player_swf(),
3001 'link' => new core_media_player_link(),
3006 * Renders a media file (audio or video) using suitable embedded player.
3008 * See embed_alternatives function for full description of parameters.
3009 * This function calls through to that one.
3011 * When using this function you can also specify width and height in the
3012 * URL by including ?d=100x100 at the end. If specified in the URL, this
3013 * will override the $width and $height parameters.
3015 * @param moodle_url $url Full URL of media file
3016 * @param string $name Optional user-readable name to display in download link
3017 * @param int $width Width in pixels (optional)
3018 * @param int $height Height in pixels (optional)
3019 * @param array $options Array of key/value pairs
3020 * @return string HTML content of embed
3022 public function embed_url(moodle_url $url, $name = '', $width = 0, $height = 0,
3023 $options = array()) {
3025 // Get width and height from URL if specified (overrides parameters in
3027 $rawurl = $url->out(false);
3028 if (preg_match('/[?#]d=([\d]{1,4}%?)x([\d]{1,4}%?)/', $rawurl, $matches)) {
3029 $width = $matches[1];
3030 $height = $matches[2];
3031 $url = new moodle_url(str_replace($matches[0], '', $rawurl));
3034 // Defer to array version of function.
3035 return $this->embed_alternatives(array($url), $name, $width, $height, $options);
3039 * Renders media files (audio or video) using suitable embedded player.
3040 * The list of URLs should be alternative versions of the same content in
3041 * multiple formats. If there is only one format it should have a single
3044 * If the media files are not in a supported format, this will give students
3045 * a download link to each format. The download link uses the filename
3046 * unless you supply the optional name parameter.
3048 * Width and height are optional. If specified, these are suggested sizes
3049 * and should be the exact values supplied by the user, if they come from
3050 * user input. These will be treated as relating to the size of the video
3051 * content, not including any player control bar.
3053 * For audio files, height will be ignored. For video files, a few formats
3054 * work if you specify only width, but in general if you specify width
3055 * you must specify height as well.
3057 * The $options array is passed through to the core_media_player classes
3058 * that render the object tag. The keys can contain values from
3059 * core_media::OPTION_xx.
3061 * @param array $alternatives Array of moodle_url to media files
3062 * @param string $name Optional user-readable name to display in download link
3063 * @param int $width Width in pixels (optional)
3064 * @param int $height Height in pixels (optional)
3065 * @param array $options Array of key/value pairs
3066 * @return string HTML content of embed
3068 public function embed_alternatives($alternatives, $name = '', $width = 0, $height = 0,
3069 $options = array()) {
3071 // Get list of player plugins (will also require the library).
3072 $players = $this->get_players();
3074 // Set up initial text which will be replaced by first player that
3075 // supports any of the formats.
3076 $out = core_media_player::PLACEHOLDER;
3078 // Loop through all players that support any of these URLs.
3079 foreach ($players as $player) {
3080 // Option: When no other player matched, don't do the default link player.
3081 if (!empty($options[core_media::OPTION_FALLBACK_TO_BLANK]) &&
3082 $player->get_rank() === 0 && $out === core_media_player::PLACEHOLDER) {
3086 $supported = $player->list_supported_urls($alternatives, $options);
3089 $text = $player->embed($supported, $name, $width, $height, $options);
3091 // Put this in place of the 'fallback' slot in the previous text.
3092 $out = str_replace(core_media_player::PLACEHOLDER, $text, $out);
3096 // Remove 'fallback' slot from final version and return it.
3097 $out = str_replace(core_media_player::PLACEHOLDER, '', $out);
3098 if (!empty($options[core_media::OPTION_BLOCK]) && $out !== '') {
3099 $out = html_writer::tag('div', $out, array('class' => 'resourcecontent'));
3105 * Checks whether a file can be embedded. If this returns true you will get
3106 * an embedded player; if this returns false, you will just get a download
3109 * This is a wrapper for can_embed_urls.
3111 * @param moodle_url $url URL of media file
3112 * @param array $options Options (same as when embedding)
3113 * @return bool True if file can be embedded
3115 public function can_embed_url(moodle_url $url, $options = array()) {
3116 return $this->can_embed_urls(array($url), $options);
3120 * Checks whether a file can be embedded. If this returns true you will get
3121 * an embedded player; if this returns false, you will just get a download
3124 * @param array $urls URL of media file and any alternatives (moodle_url)
3125 * @param array $options Options (same as when embedding)
3126 * @return bool True if file can be embedded
3128 public function can_embed_urls(array $urls, $options = array()) {
3129 // Check all players to see if any of them support it.
3130 foreach ($this->get_players() as $player) {
3131 // Link player (always last on list) doesn't count!
3132 if ($player->get_rank() <= 0) {
3135 // First player that supports it, return true.
3136 if ($player->list_supported_urls($urls, $options)) {
3144 * Obtains a list of markers that can be used in a regular expression when
3145 * searching for URLs that can be embedded by any player type.
3147 * This string is used to improve peformance of regex matching by ensuring
3148 * that the (presumably C) regex code can do a quick keyword check on the
3149 * URL part of a link to see if it matches one of these, rather than having
3150 * to go into PHP code for every single link to see if it can be embedded.
3152 * @return string String suitable for use in regex such as '(\.mp4|\.flv)'
3154 public function get_embeddable_markers() {
3155 if (empty($this->embeddablemarkers)) {
3157 foreach ($this->get_players() as $player) {
3158 foreach ($player->get_embeddable_markers() as $marker) {
3159 if ($markers !== '') {
3162 $markers .= preg_quote($marker);
3165 $this->embeddablemarkers = $markers;
3167 return $this->embeddablemarkers;