3 // This file is part of Moodle - http://moodle.org/
5 // Moodle is free software: you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation, either version 3 of the License, or
8 // (at your option) any later version.
10 // Moodle is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
19 * Classes for rendering HTML output for Moodle.
21 * Please see http://docs.moodle.org/en/Developement:How_Moodle_outputs_HTML
25 * @copyright 2009 Tim Hunt
26 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
30 * Simple base class for Moodle renderers.
32 * Tracks the xhtml_container_stack to use, which is passed in in the constructor.
34 * Also has methods to facilitate generating HTML output.
36 * @copyright 2009 Tim Hunt
37 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
41 /** @var xhtml_container_stack the xhtml_container_stack to use. */
42 protected $opencontainers;
43 /** @var moodle_page the page we are rendering for. */
45 /** @var requested rendering target conatnt */
50 * @param moodle_page $page the page we are doing output for.
51 * @param string $target one of rendering target constants
53 public function __construct(moodle_page $page, $target) {
54 $this->opencontainers = $page->opencontainers;
56 $this->target = $target;
60 * Returns rendered widget.
61 * @param renderable $widget intence with renderable interface
64 public function render(renderable $widget) {
65 $rendermethod = 'render_'.get_class($widget);
66 if (method_exists($this, $rendermethod)) {
67 return $this->$rendermethod($widget);
69 throw new coding_exception('Can not render widget, renderer method ('.$rendermethod.') not found.');
73 * Adds JS handlers needed for event execution for one html element id
74 * @param component_action $actions
76 * @return string id of element, either original submitted or random new if not supplied
78 public function add_action_handler(component_action $action, $id=null) {
80 $id = html_writer::random_id($action->event);
82 $this->page->requires->event_handler("#$id", $action->event, $action->jsfunction, $action->jsfunctionargs);
87 * Have we started output yet?
88 * @return boolean true if the header has been printed.
90 public function has_started() {
91 return $this->page->state >= moodle_page::STATE_IN_BODY;
95 * Given an array or space-separated list of classes, prepares and returns the HTML class attribute value
96 * @param mixed $classes Space-separated string or array of classes
97 * @return string HTML class attribute value
99 public static function prepare_classes($classes) {
100 if (is_array($classes)) {
101 return implode(' ', array_unique($classes));
107 * Return the moodle_url for an image.
108 * The exact image location and extension is determined
109 * automatically by searching for gif|png|jpg|jpeg, please
110 * note there can not be diferent images with the different
111 * extension. The imagename is for historical reasons
112 * a relative path name, it may be changed later for core
113 * images. It is recommended to not use subdirectories
114 * in plugin and theme pix directories.
116 * There are three types of images:
117 * 1/ theme images - stored in theme/mytheme/pix/,
118 * use component 'theme'
119 * 2/ core images - stored in /pix/,
120 * overridden via theme/mytheme/pix_core/
121 * 3/ plugin images - stored in mod/mymodule/pix,
122 * overridden via theme/mytheme/pix_plugins/mod/mymodule/,
123 * example: pix_url('comment', 'mod_glossary')
125 * @param string $imagename the pathname of the image
126 * @param string $component full plugin name (aka component) or 'theme'
129 public function pix_url($imagename, $component = 'moodle') {
130 return $this->page->theme->pix_url($imagename, $component);
136 * Basis for all plugin renderers.
138 * @author Petr Skoda (skodak)
139 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
142 class plugin_renderer_base extends renderer_base {
144 * A reference to the current general renderer probably {@see core_renderer}
150 * Contructor method, calls the parent constructor
151 * @param moodle_page $page
152 * @param string $target one of rendering target constants
154 public function __construct(moodle_page $page, $target) {
155 $this->output = $page->get_renderer('core', null, $target);
156 parent::__construct($page, $target);
160 * Returns rendered widget.
161 * @param renderable $widget intence with renderable interface
164 public function render(renderable $widget) {
165 $rendermethod = 'render_'.get_class($widget);
166 if (method_exists($this, $rendermethod)) {
167 return $this->$rendermethod($widget);
169 // pass to core renderer if method not found here
170 $this->output->render($widget);
174 * Magic method used to pass calls otherwise meant for the standard renderer
175 * to it to ensure we don't go causing unnessecary greif.
177 * @param string $method
178 * @param array $arguments
181 public function __call($method, $arguments) {
182 if (method_exists('renderer_base', $method)) {
183 throw new coding_exception('Protected method called against '.__CLASS__.' :: '.$method);
185 if (method_exists($this->output, $method)) {
186 return call_user_func_array(array($this->output, $method), $arguments);
188 throw new coding_exception('Unknown method called against '.__CLASS__.' :: '.$method);
195 * The standard implementation of the core_renderer interface.
197 * @copyright 2009 Tim Hunt
198 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
201 class core_renderer extends renderer_base {
202 /** @var string used in {@link header()}. */
203 const PERFORMANCE_INFO_TOKEN = '%%PERFORMANCEINFO%%';
204 /** @var string used in {@link header()}. */
205 const END_HTML_TOKEN = '%%ENDHTML%%';
206 /** @var string used in {@link header()}. */
207 const MAIN_CONTENT_TOKEN = '[MAIN CONTENT GOES HERE]';
208 /** @var string used to pass information from {@link doctype()} to {@link standard_head_html()}. */
209 protected $contenttype;
210 /** @var string used by {@link redirect_message()} method to communicate with {@link header()}. */
211 protected $metarefreshtag = '';
214 * Get the DOCTYPE declaration that should be used with this page. Designed to
215 * be called in theme layout.php files.
216 * @return string the DOCTYPE declaration (and any XML prologue) that should be used.
218 public function doctype() {
221 $doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">' . "\n";
222 $this->contenttype = 'text/html; charset=utf-8';
224 if (empty($CFG->xmlstrictheaders)) {
228 // We want to serve the page with an XML content type, to force well-formedness errors to be reported.
229 $prolog = '<?xml version="1.0" encoding="utf-8"?>' . "\n";
230 if (isset($_SERVER['HTTP_ACCEPT']) && strpos($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml') !== false) {
231 // Firefox and other browsers that can cope natively with XHTML.
232 $this->contenttype = 'application/xhtml+xml; charset=utf-8';
234 } else if (preg_match('/MSIE.*Windows NT/', $_SERVER['HTTP_USER_AGENT'])) {
235 // IE can't cope with application/xhtml+xml, but it will cope if we send application/xml with an XSL stylesheet.
236 $this->contenttype = 'application/xml; charset=utf-8';
237 $prolog .= '<?xml-stylesheet type="text/xsl" href="' . $CFG->httpswwwroot . '/lib/xhtml.xsl"?>' . "\n";
243 return $prolog . $doctype;
247 * The attributes that should be added to the <html> tag. Designed to
248 * be called in theme layout.php files.
249 * @return string HTML fragment.
251 public function htmlattributes() {
252 return get_html_lang(true) . ' xmlns="http://www.w3.org/1999/xhtml"';
256 * The standard tags (meta tags, links to stylesheets and JavaScript, etc.)
257 * that should be included in the <head> tag. Designed to be called in theme
259 * @return string HTML fragment.
261 public function standard_head_html() {
262 global $CFG, $SESSION;
264 $output .= '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />' . "\n";
265 $output .= '<meta name="keywords" content="moodle, ' . $this->page->title . '" />' . "\n";
266 if (!$this->page->cacheable) {
267 $output .= '<meta http-equiv="pragma" content="no-cache" />' . "\n";
268 $output .= '<meta http-equiv="expires" content="0" />' . "\n";
270 // This is only set by the {@link redirect()} method
271 $output .= $this->metarefreshtag;
273 // Check if a periodic refresh delay has been set and make sure we arn't
274 // already meta refreshing
275 if ($this->metarefreshtag=='' && $this->page->periodicrefreshdelay!==null) {
276 $output .= '<meta http-equiv="refresh" content="'.$this->page->periodicrefreshdelay.';url='.$this->page->url->out().'" />';
279 $this->page->requires->js_function_call('setTimeout', array('fix_column_widths()', 20));
281 $focus = $this->page->focuscontrol;
282 if (!empty($focus)) {
283 if (preg_match("#forms\['([a-zA-Z0-9]+)'\].elements\['([a-zA-Z0-9]+)'\]#", $focus, $matches)) {
284 // This is a horrifically bad way to handle focus but it is passed in
285 // through messy formslib::moodleform
286 $this->page->requires->js_function_call('old_onload_focus', array($matches[1], $matches[2]));
287 } else if (strpos($focus, '.')!==false) {
288 // Old style of focus, bad way to do it
289 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);
290 $this->page->requires->js_function_call('old_onload_focus', explode('.', $focus, 2));
292 // Focus element with given id
293 $this->page->requires->js_function_call('focuscontrol', array($focus));
297 // Get the theme stylesheet - this has to be always first CSS, this loads also styles.css from all plugins;
298 // any other custom CSS can not be overridden via themes and is highly discouraged
299 $urls = $this->page->theme->css_urls($this->page);
300 foreach ($urls as $url) {
301 $this->page->requires->css_theme($url);
304 // Get the theme javascript head and footer
305 $jsurl = $this->page->theme->javascript_url(true);
306 $this->page->requires->js($jsurl, true);
307 $jsurl = $this->page->theme->javascript_url(false);
308 $this->page->requires->js($jsurl);
310 // Perform a browser environment check for the flash version. Should only run once per login session.
311 if (!NO_MOODLE_COOKIES && isloggedin() && !empty($CFG->excludeoldflashclients) && empty($SESSION->flashversion)) {
312 $this->page->requires->js('/lib/swfobject/swfobject.js');
313 $this->page->requires->js_init_call('M.core_flashdetect.init');
316 // Get any HTML from the page_requirements_manager.
317 $output .= $this->page->requires->get_head_code($this->page, $this);
319 // List alternate versions.
320 foreach ($this->page->alternateversions as $type => $alt) {
321 $output .= html_writer::empty_tag('link', array('rel' => 'alternate',
322 'type' => $type, 'title' => $alt->title, 'href' => $alt->url));
329 * The standard tags (typically skip links) that should be output just inside
330 * the start of the <body> tag. Designed to be called in theme layout.php files.
331 * @return string HTML fragment.
333 public function standard_top_of_body_html() {
334 return $this->page->requires->get_top_of_body_code();
338 * The standard tags (typically performance information and validation links,
339 * if we are in developer debug mode) that should be output in the footer area
340 * of the page. Designed to be called in theme layout.php files.
341 * @return string HTML fragment.
343 public function standard_footer_html() {
346 // This function is normally called from a layout.php file in {@link header()}
347 // but some of the content won't be known until later, so we return a placeholder
348 // for now. This will be replaced with the real content in {@link footer()}.
349 $output = self::PERFORMANCE_INFO_TOKEN;
350 if (!empty($CFG->debugpageinfo)) {
351 $output .= '<div class="performanceinfo">This page is: ' . $this->page->debug_summary() . '</div>';
353 if (!empty($CFG->debugvalidators)) {
354 $output .= '<div class="validators"><ul>
355 <li><a href="http://validator.w3.org/check?verbose=1&ss=1&uri=' . urlencode(qualified_me()) . '">Validate HTML</a></li>
356 <li><a href="http://www.contentquality.com/mynewtester/cynthia.exe?rptmode=-1&url1=' . urlencode(qualified_me()) . '">Section 508 Check</a></li>
357 <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>
364 * The standard tags (typically script tags that are not needed earlier) that
365 * should be output after everything else, . Designed to be called in theme layout.php files.
366 * @return string HTML fragment.
368 public function standard_end_of_body_html() {
369 // This function is normally called from a layout.php file in {@link header()}
370 // but some of the content won't be known until later, so we return a placeholder
371 // for now. This will be replaced with the real content in {@link footer()}.
372 echo self::END_HTML_TOKEN;
376 * Return the standard string that says whether you are logged in (and switched
377 * roles/logged in as another user).
378 * @return string HTML fragment.
380 public function login_info() {
381 global $USER, $CFG, $DB;
383 if (during_initial_install()) {
387 $course = $this->page->course;
389 if (session_is_loggedinas()) {
390 $realuser = session_get_realuser();
391 $fullname = fullname($realuser, true);
392 $realuserinfo = " [<a href=\"$CFG->wwwroot/course/loginas.php?id=$course->id&return=1&sesskey=".sesskey()."\">$fullname</a>] ";
397 $loginurl = get_login_url();
399 if (empty($course->id)) {
400 // $course->id is not defined during installation
402 } else if (!empty($USER->id)) {
403 $context = get_context_instance(CONTEXT_COURSE, $course->id);
405 $fullname = fullname($USER, true);
406 $username = "<a href=\"$CFG->wwwroot/user/view.php?id=$USER->id&course=$course->id\">$fullname</a>";
407 if (is_mnet_remote_user($USER) and $idprovider = $DB->get_record('mnet_host', array('id'=>$USER->mnethostid))) {
408 $username .= " from <a href=\"{$idprovider->wwwroot}\">{$idprovider->name}</a>";
410 if (isset($USER->username) && $USER->username == 'guest') {
411 $loggedinas = $realuserinfo.get_string('loggedinasguest').
412 " (<a href=\"$loginurl\">".get_string('login').'</a>)';
413 } else if (!empty($USER->access['rsw'][$context->path])) {
415 if ($role = $DB->get_record('role', array('id'=>$USER->access['rsw'][$context->path]))) {
416 $rolename = ': '.format_string($role->name);
418 $loggedinas = get_string('loggedinas', 'moodle', $username).$rolename.
419 " (<a href=\"$CFG->wwwroot/course/view.php?id=$course->id&switchrole=0&sesskey=".sesskey()."\">".get_string('switchrolereturn').'</a>)';
421 $loggedinas = $realuserinfo.get_string('loggedinas', 'moodle', $username).' '.
422 " (<a href=\"$CFG->wwwroot/login/logout.php?sesskey=".sesskey()."\">".get_string('logout').'</a>)';
425 $loggedinas = get_string('loggedinnot', 'moodle').
426 " (<a href=\"$loginurl\">".get_string('login').'</a>)';
429 $loggedinas = '<div class="logininfo">'.$loggedinas.'</div>';
431 if (isset($SESSION->justloggedin)) {
432 unset($SESSION->justloggedin);
433 if (!empty($CFG->displayloginfailures)) {
434 if (!empty($USER->username) and $USER->username != 'guest') {
435 if ($count = count_login_failures($CFG->displayloginfailures, $USER->username, $USER->lastlogin)) {
436 $loggedinas .= ' <div class="loginfailures">';
437 if (empty($count->accounts)) {
438 $loggedinas .= get_string('failedloginattempts', '', $count);
440 $loggedinas .= get_string('failedloginattemptsall', '', $count);
442 if (has_capability('coursereport/log:view', get_context_instance(CONTEXT_SYSTEM))) {
443 $loggedinas .= ' (<a href="'.$CFG->wwwroot.'/course/report/log/index.php'.
444 '?chooselog=1&id=1&modid=site_errors">'.get_string('logs').'</a>)';
446 $loggedinas .= '</div>';
456 * Return the 'back' link that normally appears in the footer.
457 * @return string HTML fragment.
459 public function home_link() {
462 if ($this->page->pagetype == 'site-index') {
463 // Special case for site home page - please do not remove
464 return '<div class="sitelink">' .
465 '<a title="Moodle" href="http://moodle.org/">' .
466 '<img style="width:100px;height:30px" src="' . $this->pix_url('moodlelogo') . '" alt="moodlelogo" /></a></div>';
468 } else if (!empty($CFG->target_release) && $CFG->target_release != $CFG->release) {
469 // Special case for during install/upgrade.
470 return '<div class="sitelink">'.
471 '<a title="Moodle" href="http://docs.moodle.org/en/Administrator_documentation" onclick="this.target=\'_blank\'">' .
472 '<img style="width:100px;height:30px" src="' . $this->pix_url('moodlelogo') . '" alt="moodlelogo" /></a></div>';
474 } else if ($this->page->course->id == $SITE->id || strpos($this->page->pagetype, 'course-view') === 0) {
475 return '<div class="homelink"><a href="' . $CFG->wwwroot . '/">' .
476 get_string('home') . '</a></div>';
479 return '<div class="homelink"><a href="' . $CFG->wwwroot . '/course/view.php?id=' . $this->page->course->id . '">' .
480 format_string($this->page->course->shortname) . '</a></div>';
485 * Redirects the user by any means possible given the current state
487 * This function should not be called directly, it should always be called using
488 * the redirect function in lib/weblib.php
490 * The redirect function should really only be called before page output has started
491 * however it will allow itself to be called during the state STATE_IN_BODY
493 * @param string $encodedurl The URL to send to encoded if required
494 * @param string $message The message to display to the user if any
495 * @param int $delay The delay before redirecting a user, if $message has been
496 * set this is a requirement and defaults to 3, set to 0 no delay
497 * @param boolean $debugdisableredirect this redirect has been disabled for
498 * debugging purposes. Display a message that explains, and don't
499 * trigger the redirect.
500 * @return string The HTML to display to the user before dying, may contain
501 * meta refresh, javascript refresh, and may have set header redirects
503 public function redirect_message($encodedurl, $message, $delay, $debugdisableredirect) {
505 $url = str_replace('&', '&', $encodedurl);
507 switch ($this->page->state) {
508 case moodle_page::STATE_BEFORE_HEADER :
509 // No output yet it is safe to delivery the full arsenal of redirect methods
510 if (!$debugdisableredirect) {
511 // Don't use exactly the same time here, it can cause problems when both redirects fire at the same time.
512 $this->metarefreshtag = '<meta http-equiv="refresh" content="'. $delay .'; url='. $encodedurl .'" />'."\n";
513 $this->page->requires->js_function_call('document.location.replace', array($url), false, ($delay + 3));
515 $output = $this->header();
517 case moodle_page::STATE_PRINTING_HEADER :
518 // We should hopefully never get here
519 throw new coding_exception('You cannot redirect while printing the page header');
521 case moodle_page::STATE_IN_BODY :
522 // We really shouldn't be here but we can deal with this
523 debugging("You should really redirect before you start page output");
524 if (!$debugdisableredirect) {
525 $this->page->requires->js_function_call('document.location.replace', array($url), false, $delay);
527 $output = $this->opencontainers->pop_all_but_last();
529 case moodle_page::STATE_DONE :
530 // Too late to be calling redirect now
531 throw new coding_exception('You cannot redirect after the entire page has been generated');
534 $output .= $this->notification($message, 'redirectmessage');
535 $output .= '<a href="'. $encodedurl .'">'. get_string('continue') .'</a>';
536 if ($debugdisableredirect) {
537 $output .= '<p><strong>Error output, so disabling automatic redirect.</strong></p>';
539 $output .= $this->footer();
544 * Start output by sending the HTTP headers, and printing the HTML <head>
545 * and the start of the <body>.
547 * To control what is printed, you should set properties on $PAGE. If you
548 * are familiar with the old {@link print_header()} function from Moodle 1.9
549 * you will find that there are properties on $PAGE that correspond to most
550 * of the old parameters to could be passed to print_header.
552 * Not that, in due course, the remaining $navigation, $menu parameters here
553 * will be replaced by more properties of $PAGE, but that is still to do.
555 * @return string HTML that you must output this, preferably immediately.
557 public function header() {
560 $this->page->set_state(moodle_page::STATE_PRINTING_HEADER);
562 // Find the appropriate page layout file, based on $this->page->pagelayout.
563 $layoutfile = $this->page->theme->layout_file($this->page->pagelayout);
564 // Render the layout using the layout file.
565 $rendered = $this->render_page_layout($layoutfile);
567 // Slice the rendered output into header and footer.
568 $cutpos = strpos($rendered, self::MAIN_CONTENT_TOKEN);
569 if ($cutpos === false) {
570 throw new coding_exception('page layout file ' . $layoutfile .
571 ' does not contain the string "' . self::MAIN_CONTENT_TOKEN . '".');
573 $header = substr($rendered, 0, $cutpos);
574 $footer = substr($rendered, $cutpos + strlen(self::MAIN_CONTENT_TOKEN));
576 if (empty($this->contenttype)) {
577 debugging('The page layout file did not call $OUTPUT->doctype()');
578 $header = $this->doctype() . $header;
581 send_headers($this->contenttype, $this->page->cacheable);
583 $this->opencontainers->push('header/footer', $footer);
584 $this->page->set_state(moodle_page::STATE_IN_BODY);
586 return $header . $this->skip_link_target();
590 * Renders and outputs the page layout file.
591 * @param string $layoutfile The name of the layout file
592 * @return string HTML code
594 protected function render_page_layout($layoutfile) {
595 global $CFG, $SITE, $USER;
596 // The next lines are a bit tricky. The point is, here we are in a method
597 // of a renderer class, and this object may, or may not, be the same as
598 // the global $OUTPUT object. When rendering the page layout file, we want to use
599 // this object. However, people writing Moodle code expect the current
600 // renderer to be called $OUTPUT, not $this, so define a variable called
601 // $OUTPUT pointing at $this. The same comment applies to $PAGE and $COURSE.
604 $COURSE = $this->page->course;
607 include($layoutfile);
608 $rendered = ob_get_contents();
614 * Outputs the page's footer
615 * @return string HTML fragment
617 public function footer() {
620 $output = $this->container_end_all(true);
622 $footer = $this->opencontainers->pop('header/footer');
624 if (debugging() and $DB and $DB->is_transaction_started()) {
625 // TODO: MDL-20625 print warning - transaction will be rolled back
628 // Provide some performance info if required
629 $performanceinfo = '';
630 if (defined('MDL_PERF') || (!empty($CFG->perfdebug) and $CFG->perfdebug > 7)) {
631 $perf = get_performance_info();
632 if (defined('MDL_PERFTOLOG') && !function_exists('register_shutdown_function')) {
633 error_log("PERF: " . $perf['txt']);
635 if (defined('MDL_PERFTOFOOT') || debugging() || $CFG->perfdebug > 7) {
636 $performanceinfo = $perf['html'];
639 $footer = str_replace(self::PERFORMANCE_INFO_TOKEN, $performanceinfo, $footer);
641 $footer = str_replace(self::END_HTML_TOKEN, $this->page->requires->get_end_code(), $footer);
643 $this->page->set_state(moodle_page::STATE_DONE);
646 return $output . $footer;
650 * Close all but the last open container. This is useful in places like error
651 * handling, where you want to close all the open containers (apart from <body>)
652 * before outputting the error message.
653 * @param bool $shouldbenone assert that the stack should be empty now - causes a
654 * developer debug warning if it isn't.
655 * @return string the HTML required to close any open containers inside <body>.
657 public function container_end_all($shouldbenone = false) {
658 return $this->opencontainers->pop_all_but_last($shouldbenone);
662 * Returns lang menu or '', this method also checks forcing of languages in courses.
665 public function lang_menu() {
668 if (empty($CFG->langmenu)) {
672 if ($this->page->course != SITEID and !empty($this->page->course->lang)) {
673 // do not show lang menu if language forced
677 $currlang = current_language();
678 $langs = get_list_of_languages();
680 if (count($langs) < 2) {
684 $s = new single_select($this->page->url, 'lang', $langs, $currlang, null);
685 $s->label = get_accesshide(get_string('language'));
686 $s->class = 'langmenu';
687 return $this->render($s);
691 * Output the row of editing icons for a block, as defined by the controls array.
692 * @param array $controls an array like {@link block_contents::$controls}.
693 * @return HTML fragment.
695 public function block_controls($controls) {
696 if (empty($controls)) {
699 $controlshtml = array();
700 foreach ($controls as $control) {
701 $controlshtml[] = html_writer::tag('a', array('class' => 'icon',
702 'title' => $control['caption'], 'href' => $control['url']),
703 html_writer::empty_tag('img', array('src' => $this->pix_url($control['icon'])->out(false),
704 'alt' => $control['caption'])));
706 return html_writer::tag('div', array('class' => 'commands'), implode('', $controlshtml));
710 * Prints a nice side block with an optional header.
712 * The content is described
713 * by a {@link block_contents} object.
715 * @param block_contents $bc HTML for the content
716 * @param string $region the region the block is appearing in.
717 * @return string the HTML to be output.
719 function block(block_contents $bc, $region) {
720 $bc = clone($bc); // Avoid messing up the object passed in.
721 if (empty($bc->blockinstanceid) || !strip_tags($bc->title)) {
722 $bc->collapsible = block_contents::NOT_HIDEABLE;
724 if ($bc->collapsible == block_contents::HIDDEN) {
725 $bc->add_class('hidden');
727 if (!empty($bc->controls)) {
728 $bc->add_class('block_with_controls');
731 $skiptitle = strip_tags($bc->title);
732 if (empty($skiptitle)) {
736 $output = html_writer::tag('a', array('href' => '#sb-' . $bc->skipid, 'class' => 'skip-block'), get_string('skipa', 'access', $skiptitle));
737 $skipdest = html_writer::tag('span', array('id' => 'sb-' . $bc->skipid, 'class' => 'skip-block-to'), '');
740 $output .= html_writer::start_tag('div', $bc->attributes);
742 $controlshtml = $this->block_controls($bc->controls);
746 $title = html_writer::tag('h2', null, $bc->title);
749 if ($title || $controlshtml) {
750 $output .= html_writer::tag('div', array('class' => 'header'),
751 html_writer::tag('div', array('class' => 'title'),
752 $title . $controlshtml));
755 $output .= html_writer::start_tag('div', array('class' => 'content'));
756 $output .= $bc->content;
759 $output .= html_writer::tag('div', array('class' => 'footer'), $bc->footer);
762 $output .= html_writer::end_tag('div');
763 $output .= html_writer::end_tag('div');
765 if ($bc->annotation) {
766 $output .= html_writer::tag('div', array('class' => 'blockannotation'), $bc->annotation);
768 $output .= $skipdest;
770 $this->init_block_hider_js($bc);
775 * Calls the JS require function to hide a block.
776 * @param block_contents $bc A block_contents object
779 protected function init_block_hider_js(block_contents $bc) {
780 if (!empty($bc->attributes['id']) and $bc->collapsible != block_contents::NOT_HIDEABLE) {
781 $userpref = 'block' . $bc->blockinstanceid . 'hidden';
782 user_preference_allow_ajax_update($userpref, PARAM_BOOL);
783 $this->page->requires->yui2_lib('dom');
784 $this->page->requires->yui2_lib('event');
785 $plaintitle = strip_tags($bc->title);
786 $this->page->requires->js_function_call('new block_hider', array($bc->attributes['id'], $userpref,
787 get_string('hideblocka', 'access', $plaintitle), get_string('showblocka', 'access', $plaintitle),
788 $this->pix_url('t/switch_minus')->out(false), $this->pix_url('t/switch_plus')->out(false)));
793 * Render the contents of a block_list.
794 * @param array $icons the icon for each item.
795 * @param array $items the content of each item.
796 * @return string HTML
798 public function list_block_contents($icons, $items) {
801 foreach ($items as $key => $string) {
802 $item = html_writer::start_tag('li', array('class' => 'r' . $row));
803 if (!empty($icons[$key])) { //test if the content has an assigned icon
804 $item .= html_writer::tag('div', array('class' => 'icon column c0'), $icons[$key]);
806 $item .= html_writer::tag('div', array('class' => 'column c1'), $string);
807 $item .= html_writer::end_tag('li');
809 $row = 1 - $row; // Flip even/odd.
811 return html_writer::tag('ul', array('class' => 'list'), implode("\n", $lis));
815 * Output all the blocks in a particular region.
816 * @param string $region the name of a region on this page.
817 * @return string the HTML to be output.
819 public function blocks_for_region($region) {
820 $blockcontents = $this->page->blocks->get_content_for_region($region, $this);
823 foreach ($blockcontents as $bc) {
824 if ($bc instanceof block_contents) {
825 $output .= $this->block($bc, $region);
826 } else if ($bc instanceof block_move_target) {
827 $output .= $this->block_move_target($bc);
829 throw new coding_exception('Unexpected type of thing (' . get_class($bc) . ') found in list of block contents.');
836 * Output a place where the block that is currently being moved can be dropped.
837 * @param block_move_target $target with the necessary details.
838 * @return string the HTML to be output.
840 public function block_move_target($target) {
841 return html_writer::tag('a', array('href' => $target->url, 'class' => 'blockmovetarget'),
842 html_writer::tag('span', array('class' => 'accesshide'), $target->text));
846 * Renders a sepcial html link with attached action
848 * @param string|moodle_url $url
849 * @param string $text HTML fragment
850 * @param component_action $action
851 * @param array $attributes associative array of html link attributes + disabled
852 * @return HTML fragment
854 public function action_link($url, $text, component_action $action = null, array $attributes=null) {
855 if (!($url instanceof moodle_url)) {
856 $url = new moodle_url($url);
858 $link = new action_link($url, $text, $action, $attributes);
860 return $this->render($link);
864 * Implementation of action_link rendering
865 * @param action_link $link
866 * @return string HTML fragment
868 protected function render_action_link(action_link $link) {
871 // A disabled link is rendered as formatted text
872 if (!empty($link->attributes['disabled'])) {
873 // do not use div here due to nesting restriction in xhtml strict
874 return html_writer::tag('span', $link->text, array('class'=>'currentlink'));
877 $attributes = $link->attributes;
878 unset($link->attributes['disabled']);
879 $attributes['href'] = $link->url;
881 if ($link->actions) {
882 if (empty($attributes['id'])) {
883 $id = html_writer::random_id('action_link');
884 $attributes['id'] = $id;
886 $id = $attributes['id'];
888 foreach ($link->actions as $action) {
889 $this->add_action_handler($action, $id);
893 return html_writer::tag('a', $attributes, $link->text);
898 * Similar to action_link, image is used instead of the text
900 * @param string|moodle_url $url A string URL or moodel_url
901 * @param pix_icon $pixicon
902 * @param component_action $action
903 * @param array $attributes associative array of html link attributes + disabled
904 * @param bool $linktext show title next to image in link
905 * @return string HTML fragment
907 public function action_icon($url, pix_icon $pixicon, component_action $action = null, array $attributes = null, $linktext=false) {
908 if (!($url instanceof moodle_url)) {
909 $url = new moodle_url($url);
911 $attributes = (array)$attributes;
913 if (empty($options['class'])) {
914 // let ppl override the class via $options
915 $attributes['class'] = 'action-icon';
918 $icon = $this->render($pixicon);
921 $text = $pixicon->attributes['alt'];
926 return $this->action_link($url, $text.$icon, $action, $attributes);
930 * Print a message along with button choices for Continue/Cancel
932 * If a string or moodle_url is given instead of a single_button, method defaults to post.
934 * @param string $message The question to ask the user
935 * @param single_button|moodle_url|string $continue The single_button component representing the Continue answer. Can also be a moodle_url or string URL
936 * @param single_button|moodle_url|string $cancel The single_button component representing the Cancel answer. Can also be a moodle_url or string URL
937 * @return string HTML fragment
939 public function confirm($message, $continue, $cancel) {
940 if ($continue instanceof single_button) {
942 } else if (is_string($continue)) {
943 $continue = new single_button(new moodle_url($continue), get_string('continue'), 'post');
944 } else if ($continue instanceof moodle_url) {
945 $continue = new single_button($continue, get_string('continue'), 'post');
947 throw new coding_exception('The continue param to $OUTPUT->confirm() must be either a URL (string/moodle_url) or a single_button instance.');
950 if ($cancel instanceof single_button) {
952 } else if (is_string($cancel)) {
953 $cancel = new single_button(new moodle_url($cancel), get_string('cancel'), 'get');
954 } else if ($cancel instanceof moodle_url) {
955 $cancel = new single_button($cancel, get_string('cancel'), 'get');
957 throw new coding_exception('The cancel param to $OUTPUT->confirm() must be either a URL (string/moodle_url) or a single_button instance.');
960 $output = $this->box_start('generalbox', 'notice');
961 $output .= html_writer::tag('p', array(), $message);
962 $output .= html_writer::tag('div', array('class' => 'buttons'), $this->render($continue) . $this->render($cancel));
963 $output .= $this->box_end();
968 * Returns a form with a single button.
970 * @param string|moodle_url $url
971 * @param string $label button text
972 * @param string $method get or post submit method
973 * @param array $options associative array {disabled, title, etc.}
974 * @return string HTML fragment
976 public function single_button($url, $label, $method='post', array $options=null) {
977 if (!($url instanceof moodle_url)) {
978 $url = new moodle_url($url);
980 $button = new single_button($url, $label, $method);
982 foreach ((array)$options as $key=>$value) {
983 if (array_key_exists($key, $button)) {
984 $button->$key = $value;
988 return $this->render($button);
992 * Internal implementation of single_button rendering
993 * @param single_button $button
994 * @return string HTML fragment
996 protected function render_single_button(single_button $button) {
997 $attributes = array('type' => 'submit',
998 'value' => $button->label,
999 'disabled' => $button->disabled ? 'disabled' : null,
1000 'title' => $button->tooltip);
1002 if ($button->actions) {
1003 $id = html_writer::random_id('single_button');
1004 $attributes['id'] = $id;
1005 foreach ($button->actions as $action) {
1006 $this->add_action_handler($action, $id);
1010 // first the input element
1011 $output = html_writer::empty_tag('input', $attributes);
1013 // then hidden fields
1014 $params = $button->url->params();
1015 if ($button->method === 'post') {
1016 $params['sesskey'] = sesskey();
1018 foreach ($params as $var => $val) {
1019 $output .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => $var, 'value' => $val));
1022 // then div wrapper for xhtml strictness
1023 $output = html_writer::tag('div', array(), $output);
1025 // now the form itself around it
1026 $url = $button->url->out_omit_querystring(); // url without params
1028 $url = '#'; // there has to be always some action
1030 $attributes = array('method' => $button->method,
1032 'id' => $button->formid);
1033 $output = html_writer::tag('form', $attributes, $output);
1035 // and finally one more wrapper with class
1036 return html_writer::tag('div', array('class' => $button->class), $output);
1040 * Returns a form with a single select widget.
1041 * @param moodle_url $url form action target, includes hidden fields
1042 * @param string $name name of selection field - the changing parameter in url
1043 * @param array $options list of options
1044 * @param string $selected selected element
1045 * @param array $nothing
1046 * @param string $formid
1047 * @return string HTML fragment
1049 public function single_select($url, $name, array $options, $selected='', $nothing=array(''=>'choosedots'), $formid=null) {
1050 if (!($url instanceof moodle_url)) {
1051 $url = new moodle_url($url);
1053 $select = new single_select($url, $name, $options, $selected, $nothing, $formid);
1055 return $this->render($select);
1059 * Internal implementation of single_select rendering
1060 * @param single_select $select
1061 * @return string HTML fragment
1063 protected function render_single_select(single_select $select) {
1064 $select = clone($select);
1065 if (empty($select->formid)) {
1066 $select->formid = html_writer::random_id('single_select_f');
1070 $params = $select->url->params();
1071 if ($select->method === 'post') {
1072 $params['sesskey'] = sesskey();
1074 foreach ($params as $name=>$value) {
1075 $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>$name, 'value'=>$value));
1078 if (empty($select->attributes['id'])) {
1079 $select->attributes['id'] = html_writer::random_id('single_select');
1082 if ($select->disabled) {
1083 $select->attributes['disabled'] = 'disabled';
1086 if ($select->tooltip) {
1087 $select->attributes['title'] = $select->tooltip;
1090 if ($select->label) {
1091 $output .= html_writer::tag('label', array('for'=>$select->attributes['id']), $select->label);
1094 if ($select->helpicon instanceof help_icon) {
1095 $output .= $this->render($select->helpicon);
1098 $output .= html_writer::select($select->options, $select->name, $select->selected, $select->nothing, $select->attributes);
1100 $go = html_writer::empty_tag('input', array('type'=>'submit', 'value'=>get_string('go')));
1101 $output .= html_writer::tag('noscript', array('style'=>'inline'), $go);
1103 $nothing = empty($select->nothing) ? false : key($select->nothing);
1104 $this->page->requires->js_init_call('M.util.init_select_autosubmit', array($select->formid, $select->attributes['id'], $nothing));
1106 // then div wrapper for xhtml strictness
1107 $output = html_writer::tag('div', array(), $output);
1109 // now the form itself around it
1110 $formattributes = array('method' => $select->method,
1111 'action' => $select->url->out_omit_querystring(),
1112 'id' => $select->formid);
1113 $output = html_writer::tag('form', $formattributes, $output);
1115 // and finally one more wrapper with class
1116 return html_writer::tag('div', array('class' => $select->class), $output);
1120 * Returns a form with a url select widget.
1121 * @param array $urls list of urls - array('/course/view.php?id=1'=>'Frontpage', ....)
1122 * @param string $selected selected element
1123 * @param array $nothing
1124 * @param string $formid
1125 * @return string HTML fragment
1127 public function url_select(array $urls, $selected, $nothing=array(''=>'choosedots'), $formid=null) {
1128 $select = new url_select($urls, $selected, $nothing, $formid);
1129 return $this->render($select);
1133 * Internal implementation of url_select rendering
1134 * @param single_select $select
1135 * @return string HTML fragment
1137 protected function render_url_select(url_select $select) {
1138 $select = clone($select);
1139 if (empty($select->formid)) {
1140 $select->formid = html_writer::random_id('url_select_f');
1143 if (empty($select->attributes['id'])) {
1144 $select->attributes['id'] = html_writer::random_id('url_select');
1147 if ($select->disabled) {
1148 $select->attributes['disabled'] = 'disabled';
1151 if ($select->tooltip) {
1152 $select->attributes['title'] = $select->tooltip;
1157 if ($select->label) {
1158 $output .= html_writer::tag('label', array('for'=>$select->attributes['id']), $select->label);
1161 if ($select->helpicon instanceof help_icon) {
1162 $output .= $this->render($select->helpicon);
1165 $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>'sesskey', 'value'=>sesskey()));
1166 $output .= html_writer::select($select->urls, 'jump', $select->selected, $select->nothing, $select->attributes);
1168 $go = html_writer::empty_tag('input', array('type'=>'submit', 'value'=>get_string('go')));
1169 $output .= html_writer::tag('noscript', array('style'=>'inline'), $go);
1171 $nothing = empty($select->nothing) ? false : key($select->nothing);
1172 $output .= $this->page->requires->js_init_call('M.util.init_url_select', array($select->formid, $select->attributes['id'], $nothing));
1174 // then div wrapper for xhtml strictness
1175 $output = html_writer::tag('div', array(), $output);
1177 // now the form itself around it
1178 $formattributes = array('method' => 'post',
1179 'action' => new moodle_url('/course/jumpto.php'),
1180 'id' => $select->formid);
1181 $output = html_writer::tag('form', $formattributes, $output);
1183 // and finally one more wrapper with class
1184 return html_writer::tag('div', array('class' => $select->class), $output);
1188 * Returns a string containing a link to the user documentation.
1189 * Also contains an icon by default. Shown to teachers and admin only.
1190 * @param string $path The page link after doc root and language, no leading slash.
1191 * @param string $text The text to be displayed for the link
1194 public function doc_link($path, $text) {
1197 $icon = $this->pix_icon('docs', $text, 'moodle', array('class'=>'iconhelp'));
1199 $url = new moodle_url(get_docs_url($path));
1201 $attributes = array('href'=>$url);
1202 if (!empty($CFG->doctonewwindow)) {
1203 $attributes['id'] = $this->add_action_handler(new popup_action('click', $url));
1206 return html_writer::tag('a', $attributes, $icon.$text);
1211 * @param string $pix short pix name
1212 * @param string $alt mandatory alt attribute
1213 * @param strin $component standard compoennt name like 'moodle', 'mod_form', etc.
1214 * @param array $attributes htm lattributes
1215 * @return string HTML fragment
1217 public function pix_icon($pix, $alt, $component='moodle', array $attributes = null) {
1218 $icon = new pix_icon($pix, $alt, $component, $attributes);
1219 return $this->render($icon);
1224 * @param pix_icon $icon
1225 * @return string HTML fragment
1227 protected function render_pix_icon(pix_icon $icon) {
1228 $attributes = $icon->attributes;
1229 $attributes['src'] = $this->pix_url($icon->pix, $icon->component);
1230 return html_writer::empty_tag('img', $attributes);
1234 * Centered heading with attached help button (same title text)
1235 * and optional icon attached
1236 * @param string $text A heading text
1237 * @param string $page The keyword that defines a help page
1238 * @param string $component component name
1239 * @param string|moodle_url $icon
1240 * @param string $iconalt icon alt text
1241 * @return string HTML fragment
1243 public function heading_with_help($text, $helppage, $component='moodle', $icon='', $iconalt='') {
1246 $image = $this->pix_icon($icon, $iconalt, $component, array('class'=>'icon'));
1249 $help = $this->help_icon($helppage, $text, $component);
1251 return $this->heading($image.$text.$help, 2, 'main help');
1255 * Print a help icon.
1257 * @param string $page The keyword that defines a help page
1258 * @param string $title A descriptive text for accessibility only
1259 * @param string $component component name
1260 * @param string|bool $linktext true means use $title as link text, string means link text value
1261 * @return string HTML fragment
1263 public function help_icon($helppage, $title, $component = 'moodle', $linktext='') {
1264 $icon = new help_icon($helppage, $title, $component);
1265 if ($linktext === true) {
1266 $icon->linktext = $title;
1267 } else if (!empty($linktext)) {
1268 $icon->linktext = $linktext;
1270 return $this->render($icon);
1274 * Implementation of user image rendering.
1275 * @param help_icon $helpicon
1276 * @return string HTML fragment
1278 protected function render_help_icon(help_icon $helpicon) {
1281 // first get the help image icon
1282 $src = $this->pix_url('help');
1284 if (empty($helpicon->linktext)) {
1285 $alt = $helpicon->title;
1287 $alt = get_string('helpwiththis');
1290 $attributes = array('src'=>$src, 'alt'=>$alt, 'class'=>'iconhelp');
1291 $output = html_writer::empty_tag('img', $attributes);
1293 // add the link text if given
1294 if (!empty($helpicon->linktext)) {
1295 // the spacing has to be done through CSS
1296 $output .= $helpicon->linktext;
1299 // now create the link around it - TODO: this will be changed during the big lang cleanup in 2.0
1300 $url = new moodle_url('/help.php', array('module' => $helpicon->component, 'file' => $helpicon->helppage .'.html'));
1302 // note: this title is displayed only if JS is disabled, otherwise the link will have the new ajax tooltip
1303 $title = get_string('helpprefix2', '', trim($helpicon->title, ". \t"));
1305 $attributes = array('href'=>$url, 'title'=>$title);
1306 $id = html_writer::random_id('helpicon');
1307 $attributes['id'] = $id;
1308 $this->add_action_handler(new popup_action('click', $url), $id);
1309 $output = html_writer::tag('a', $attributes, $output);
1312 return html_writer::tag('span', array('class' => 'helplink'), $output);
1316 * Print scale help icon.
1318 * @param int $courseid
1319 * @param object $scale instance
1320 * @return string HTML fragment
1322 public function help_icon_scale($courseid, stdClass $scale) {
1325 $title = get_string('helpprefix2', '', $scale->name) .' ('.get_string('newwindow').')';
1327 $icon = $this->pix_icon('help', get_string('scales'), 'moodle', array('class'=>'iconhelp'));
1329 $link = new moodle_url('/course/scales.php', array('id' => $courseid, 'list' => true, 'scaleid' => $scale->id));
1330 $action = new popup_action('click', $link->url, 'ratingscale');
1332 return html_writer::tag('span', array('class' => 'helplink'), $this->action_link($link, $icon, $action));
1336 * Creates and returns a spacer image with optional line break.
1338 * @param array $attributes
1340 * @return string HTML fragment
1342 public function spacer(array $attributes = null, $br = false) {
1343 $attributes = (array)$attributes;
1344 if (empty($attributes['width'])) {
1345 $attributes['width'] = 1;
1347 if (empty($options['height'])) {
1348 $attributes['height'] = 1;
1350 $attributes['class'] = 'spacer';
1352 $output = $this->pix_icon('spacer', '', 'moodle', $attributes);
1355 $output .= '<br />';
1362 * Print the specified user's avatar.
1364 * User avatar may be obtained in two ways:
1366 * // Option 1: (shortcut for simple cases, preferred way)
1367 * // $user has come from the DB and has fields id, picture, imagealt, firstname and lastname
1368 * $OUTPUT->user_picture($user, array('popup'=>true));
1371 * $userpic = new user_picture($user);
1372 * // Set properties of $userpic
1373 * $userpic->popup = true;
1374 * $OUTPUT->render($userpic);
1377 * @param object Object with at least fields id, picture, imagealt, firstname, lastname
1378 * If any of these are missing, the database is queried. Avoid this
1379 * if at all possible, particularly for reports. It is very bad for performance.
1380 * @param array $options associative array with user picture options, used only if not a user_picture object,
1382 * - courseid=$this->page->course->id (course id of user profile in link)
1383 * - size=35 (size of image)
1384 * - link=true (make image clickable - the link leads to user profile)
1385 * - popup=false (open in popup)
1386 * - alttext=true (add image alt attribute)
1387 * - class = image class attribute (default 'userpicture')
1388 * @return string HTML fragment
1390 public function user_picture(stdClass $user, array $options = null) {
1391 $userpicture = new user_picture($user);
1392 foreach ((array)$options as $key=>$value) {
1393 if (array_key_exists($key, $userpicture)) {
1394 $userpicture->$key = $value;
1397 return $this->render($userpicture);
1401 * Internal implementation of user image rendering.
1402 * @param user_picture $userpicture
1405 protected function render_user_picture(user_picture $userpicture) {
1408 $user = $userpicture->user;
1410 if ($userpicture->alttext) {
1411 if (!empty($user->imagealt)) {
1412 $alt = $user->imagealt;
1414 $alt = get_string('pictureof', '', fullname($user));
1420 if (empty($userpicture->size)) {
1423 } else if ($userpicture->size === true or $userpicture->size == 1) {
1426 } else if ($userpicture->size >= 50) {
1428 $size = $userpicture->size;
1431 $size = $userpicture->size;
1434 $class = $userpicture->class;
1436 if (!empty($user->picture)) {
1437 require_once($CFG->libdir.'/filelib.php');
1438 $src = new moodle_url(get_file_url($user->id.'/'.$file.'.jpg', null, 'user'));
1439 } else { // Print default user pictures (use theme version if available)
1440 $class .= ' defaultuserpic';
1441 $src = $this->pix_url('u/' . $file);
1444 $attributes = array('src'=>$src, 'alt'=>$alt, 'class'=>$class, 'width'=>$size, 'height'=>$size);
1446 // get the image html output fisrt
1447 $output = html_writer::empty_tag('img', $attributes);;
1449 // then wrap it in link if needed
1450 if (!$userpicture->link) {
1454 if (empty($userpicture->courseid)) {
1455 $courseid = $this->page->course->id;
1457 $courseid = $userpicture->courseid;
1460 $url = new moodle_url('/user/view.php', array('id' => $user->id, 'course' => $courseid));
1462 $attributes = array('href'=>$url);
1464 if ($userpicture->popup) {
1465 $id = html_writer::random_id('userpicture');
1466 $attributes['id'] = $id;
1467 $this->add_action_handler(new popup_action('click', $url), $id);
1470 return html_writer::tag('a', $attributes, $output);
1474 * Prints the 'Update this Modulename' button that appears on module pages.
1476 * @param string $cmid the course_module id.
1477 * @param string $modulename the module name, eg. "forum", "quiz" or "workshop"
1478 * @return string the HTML for the button, if this user has permission to edit it, else an empty string.
1480 public function update_module_button($cmid, $modulename) {
1482 if (has_capability('moodle/course:manageactivities', get_context_instance(CONTEXT_MODULE, $cmid))) {
1483 $modulename = get_string('modulename', $modulename);
1484 $string = get_string('updatethis', '', $modulename);
1485 $url = new moodle_url("$CFG->wwwroot/course/mod.php", array('update' => $cmid, 'return' => true, 'sesskey' => sesskey()));
1486 return $this->single_button($url, $string);
1493 * Prints a "Turn editing on/off" button in a form.
1494 * @param moodle_url $url The URL + params to send through when clicking the button
1495 * @return string HTML the button
1497 public function edit_button(moodle_url $url) {
1499 if (!empty($USER->editing)) {
1500 $string = get_string('turneditingoff');
1503 $string = get_string('turneditingon');
1507 $url = new moodle_url($url, array('edit'=>$edit));
1509 return $this->single_button($url, $string);
1513 * Prints a simple button to close a window
1515 * @param string $text The lang string for the button's label (already output from get_string())
1516 * @return string html fragment
1518 public function close_window_button($text='') {
1520 $text = get_string('closewindow');
1522 $button = new single_button(new moodle_url('#'), $text, 'get');
1523 $button->add_action(new component_action('click', 'close_window'));
1525 return $this->container($this->render($button), 'closewindow');
1529 * Output an error message. By default wraps the error message in <span class="error">.
1530 * If the error message is blank, nothing is output.
1531 * @param string $message the error message.
1532 * @return string the HTML to output.
1534 public function error_text($message) {
1535 if (empty($message)) {
1538 return html_writer::tag('span', array('class' => 'error'), $message);
1542 * Do not call this function directly.
1544 * To terminate the current script with a fatal error, call the {@link print_error}
1545 * function, or throw an exception. Doing either of those things will then call this
1546 * function to display the error, before terminating the execution.
1548 * @param string $message The message to output
1549 * @param string $moreinfourl URL where more info can be found about the error
1550 * @param string $link Link for the Continue button
1551 * @param array $backtrace The execution backtrace
1552 * @param string $debuginfo Debugging information
1553 * @return string the HTML to output.
1555 public function fatal_error($message, $moreinfourl, $link, $backtrace, $debuginfo = null) {
1560 if ($this->has_started()) {
1561 // we can not always recover properly here, we have problems with output buffering,
1562 // html tables, etc.
1563 $output .= $this->opencontainers->pop_all_but_last();
1566 // It is really bad if library code throws exception when output buffering is on,
1567 // because the buffered text would be printed before our start of page.
1568 // NOTE: this hack might be behave unexpectedly in case output buffering is enabled in PHP.ini
1569 while (ob_get_level() > 0) {
1570 $obbuffer .= ob_get_clean();
1573 // Header not yet printed
1574 if (isset($_SERVER['SERVER_PROTOCOL'])) {
1575 // server protocol should be always present, because this render
1576 // can not be used from command line or when outputting custom XML
1577 @header($_SERVER['SERVER_PROTOCOL'] . ' 404 Not Found');
1579 $this->page->set_url('/'); // no url
1580 //$this->page->set_pagelayout('base'); //TODO: MDL-20676 blocks on error pages are weird, unfortunately it somehow detect the pagelayout from URL :-(
1581 $this->page->set_title(get_string('error'));
1582 $output .= $this->header();
1585 $message = '<p class="errormessage">' . $message . '</p>'.
1586 '<p class="errorcode"><a href="' . $moreinfourl . '">' .
1587 get_string('moreinformation') . '</a></p>';
1588 $output .= $this->box($message, 'errorbox');
1590 if (debugging('', DEBUG_DEVELOPER)) {
1591 if (!empty($debuginfo)) {
1592 $output .= $this->notification('<strong>Debug info:</strong> '.s($debuginfo), 'notifytiny');
1594 if (!empty($backtrace)) {
1595 $output .= $this->notification('<strong>Stack trace:</strong> '.format_backtrace($backtrace), 'notifytiny');
1597 if ($obbuffer !== '' ) {
1598 $output .= $this->notification('<strong>Output buffer:</strong> '.s($obbuffer), 'notifytiny');
1602 if (!empty($link)) {
1603 $output .= $this->continue_button($link);
1606 $output .= $this->footer();
1608 // Padding to encourage IE to display our error page, rather than its own.
1609 $output .= str_repeat(' ', 512);
1615 * Output a notification (that is, a status message about something that has
1618 * @param string $message the message to print out
1619 * @param string $classes normally 'notifyproblem' or 'notifysuccess'.
1620 * @return string the HTML to output.
1622 public function notification($message, $classes = 'notifyproblem') {
1623 return html_writer::tag('div', array('class' =>
1624 renderer_base::prepare_classes($classes)), clean_text($message));
1628 * Print a continue button that goes to a particular URL.
1630 * @param string|moodle_url $url The url the button goes to.
1631 * @return string the HTML to output.
1633 public function continue_button($url) {
1634 if (!($url instanceof moodle_url)) {
1635 $url = new moodle_url($url);
1637 $button = new single_button($url, get_string('continue'), 'get');
1638 $button->class = 'continuebutton';
1640 return $this->render($button);
1644 * Prints a single paging bar to provide access to other pages (usually in a search)
1646 * @param int $totalcount Thetotal number of entries available to be paged through
1647 * @param int $page The page you are currently viewing
1648 * @param int $perpage The number of entries that should be shown per page
1649 * @param string|moodle_url $baseurl url of the current page, the $pagevar parameter is added
1650 * @param string $pagevar name of page parameter that holds the page number
1651 * @return string the HTML to output.
1653 public function paging_bar($totalcount, $page, $perpage, $baseurl, $pagevar = 'page') {
1654 $pb = new paging_bar($totalcount, $page, $perpage, $baseurl, $pagevar);
1655 return $this->render($pb);
1659 * Internal implementation of paging bar rendering.
1660 * @param paging_bar $pagingbar
1663 protected function render_paging_bar(paging_bar $pagingbar) {
1665 $pagingbar = clone($pagingbar);
1666 $pagingbar->prepare($this, $this->page, $this->target);
1668 if ($pagingbar->totalcount > $pagingbar->perpage) {
1669 $output .= get_string('page') . ':';
1671 if (!empty($pagingbar->previouslink)) {
1672 $output .= ' (' . $pagingbar->previouslink . ') ';
1675 if (!empty($pagingbar->firstlink)) {
1676 $output .= ' ' . $pagingbar->firstlink . ' ...';
1679 foreach ($pagingbar->pagelinks as $link) {
1680 $output .= "  $link";
1683 if (!empty($pagingbar->lastlink)) {
1684 $output .= ' ...' . $pagingbar->lastlink . ' ';
1687 if (!empty($pagingbar->nextlink)) {
1688 $output .= '  (' . $pagingbar->nextlink . ')';
1692 return html_writer::tag('div', array('class' => 'paging'), $output);
1696 * Render a HTML table
1698 * @param object $table {@link html_table} instance containing all the information needed
1699 * @return string the HTML to output.
1701 public function table(html_table $table) {
1702 $table = clone($table);
1703 $table->prepare($this, $this->page, $this->target);
1704 $attributes = array(
1706 'width' => $table->width,
1707 'summary' => $table->summary,
1708 'cellpadding' => $table->cellpadding,
1709 'cellspacing' => $table->cellspacing,
1710 'class' => $table->get_classes_string());
1711 $output = html_writer::start_tag('table', $attributes) . "\n";
1715 if (!empty($table->head)) {
1716 $countcols = count($table->head);
1717 $output .= html_writer::start_tag('thead', $table->headclasses) . "\n";
1718 $output .= html_writer::start_tag('tr', array()) . "\n";
1719 $keys = array_keys($table->head);
1720 $lastkey = end($keys);
1722 foreach ($table->head as $key => $heading) {
1723 // Convert plain string headings into html_table_cell objects
1724 if (!($heading instanceof html_table_cell)) {
1725 $headingtext = $heading;
1726 $heading = new html_table_cell();
1727 $heading->text = $headingtext;
1728 $heading->header = true;
1731 if ($heading->header !== false) {
1732 $heading->header = true;
1735 $heading->add_classes(array('header', 'c' . $key));
1736 if (isset($table->headspan[$key]) && $table->headspan[$key] > 1) {
1737 $heading->colspan = $table->headspan[$key];
1738 $countcols += $table->headspan[$key] - 1;
1741 if ($key == $lastkey) {
1742 $heading->add_class('lastcol');
1744 if (isset($table->colclasses[$key])) {
1745 $heading->add_class($table->colclasses[$key]);
1747 if ($table->rotateheaders) {
1748 // we need to wrap the heading content
1749 $heading->text = html_writer::tag('span', null, $heading->text);
1752 $attributes = array(
1753 'style' => $table->align[$key] . $table->size[$key] . $heading->style,
1754 'class' => $heading->get_classes_string(),
1755 'scope' => $heading->scope,
1756 'colspan' => $heading->colspan);
1759 if ($heading->header === true) {
1762 $output .= html_writer::tag($tagtype, $attributes, $heading->text) . "\n";
1764 $output .= html_writer::end_tag('tr') . "\n";
1765 $output .= html_writer::end_tag('thead') . "\n";
1767 if (empty($table->data)) {
1768 // For valid XHTML strict every table must contain either a valid tr
1769 // or a valid tbody... both of which must contain a valid td
1770 $output .= html_writer::start_tag('tbody', array('class' => renderer_base::prepare_classes($table->bodyclasses).' empty'));
1771 $output .= html_writer::tag('tr', null, html_writer::tag('td', array('colspan'=>count($table->head)), ''));
1772 $output .= html_writer::end_tag('tbody');
1776 if (!empty($table->data)) {
1778 $keys = array_keys($table->data);
1779 $lastrowkey = end($keys);
1780 $output .= html_writer::start_tag('tbody', array('class' => renderer_base::prepare_classes($table->bodyclasses))) . "\n";
1782 foreach ($table->data as $key => $row) {
1783 if (($row === 'hr') && ($countcols)) {
1784 $output .= html_writer::tag('td', array('colspan' => $countcols),
1785 html_writer::tag('div', array('class' => 'tabledivider'), '')) . "\n";
1787 // Convert array rows to html_table_rows and cell strings to html_table_cell objects
1788 if (!($row instanceof html_table_row)) {
1789 $newrow = new html_table_row();
1791 foreach ($row as $unused => $item) {
1792 $cell = new html_table_cell();
1793 $cell->text = $item;
1794 $newrow->cells[] = $cell;
1799 $oddeven = $oddeven ? 0 : 1;
1800 if (isset($table->rowclasses[$key])) {
1801 $row->add_classes(array_unique(html_component::clean_classes($table->rowclasses[$key])));
1804 $row->add_class('r' . $oddeven);
1805 if ($key == $lastrowkey) {
1806 $row->add_class('lastrow');
1809 $output .= html_writer::start_tag('tr', array('class' => $row->get_classes_string(), 'style' => $row->style, 'id' => $row->id)) . "\n";
1810 $keys2 = array_keys($row->cells);
1811 $lastkey = end($keys2);
1813 foreach ($row->cells as $key => $cell) {
1814 if (!($cell instanceof html_table_cell)) {
1815 $mycell = new html_table_cell();
1816 $mycell->text = $cell;
1820 if (isset($table->colclasses[$key])) {
1821 $cell->add_classes(array_unique(html_component::clean_classes($table->colclasses[$key])));
1824 $cell->add_classes('cell');
1825 $cell->add_classes('c' . $key);
1826 if ($key == $lastkey) {
1827 $cell->add_classes('lastcol');
1830 $tdstyle .= isset($table->align[$key]) ? $table->align[$key] : '';
1831 $tdstyle .= isset($table->size[$key]) ? $table->size[$key] : '';
1832 $tdstyle .= isset($table->wrap[$key]) ? $table->wrap[$key] : '';
1833 $tdattributes = array(
1834 'style' => $tdstyle . $cell->style,
1835 'colspan' => $cell->colspan,
1836 'rowspan' => $cell->rowspan,
1838 'class' => $cell->get_classes_string(),
1839 'abbr' => $cell->abbr,
1840 'scope' => $cell->scope,
1841 'title' => $cell->title);
1843 if ($cell->header === true) {
1846 $output .= html_writer::tag($tagtype, $tdattributes, $cell->text) . "\n";
1849 $output .= html_writer::end_tag('tr') . "\n";
1851 $output .= html_writer::end_tag('tbody') . "\n";
1853 $output .= html_writer::end_tag('table') . "\n";
1855 if ($table->rotateheaders && can_use_rotated_text()) {
1856 $this->page->requires->yui2_lib('event');
1857 $this->page->requires->js('/course/report/progress/textrotate.js');
1864 * Output the place a skip link goes to.
1865 * @param string $id The target name from the corresponding $PAGE->requires->skip_link_to($target) call.
1866 * @return string the HTML to output.
1868 public function skip_link_target($id = null) {
1869 return html_writer::tag('span', array('id' => $id), '');
1874 * @param string $text The text of the heading
1875 * @param int $level The level of importance of the heading. Defaulting to 2
1876 * @param string $classes A space-separated list of CSS classes
1877 * @param string $id An optional ID
1878 * @return string the HTML to output.
1880 public function heading($text, $level = 2, $classes = 'main', $id = null) {
1881 $level = (integer) $level;
1882 if ($level < 1 or $level > 6) {
1883 throw new coding_exception('Heading level must be an integer between 1 and 6.');
1885 return html_writer::tag('h' . $level,
1886 array('id' => $id, 'class' => renderer_base::prepare_classes($classes)), $text);
1891 * @param string $contents The contents of the box
1892 * @param string $classes A space-separated list of CSS classes
1893 * @param string $id An optional ID
1894 * @return string the HTML to output.
1896 public function box($contents, $classes = 'generalbox', $id = null) {
1897 return $this->box_start($classes, $id) . $contents . $this->box_end();
1901 * Outputs the opening section of a box.
1902 * @param string $classes A space-separated list of CSS classes
1903 * @param string $id An optional ID
1904 * @return string the HTML to output.
1906 public function box_start($classes = 'generalbox', $id = null) {
1907 $this->opencontainers->push('box', html_writer::end_tag('div'));
1908 return html_writer::start_tag('div', array('id' => $id,
1909 'class' => 'box ' . renderer_base::prepare_classes($classes)));
1913 * Outputs the closing section of a box.
1914 * @return string the HTML to output.
1916 public function box_end() {
1917 return $this->opencontainers->pop('box');
1921 * Outputs a container.
1922 * @param string $contents The contents of the box
1923 * @param string $classes A space-separated list of CSS classes
1924 * @param string $id An optional ID
1925 * @return string the HTML to output.
1927 public function container($contents, $classes = null, $id = null) {
1928 return $this->container_start($classes, $id) . $contents . $this->container_end();
1932 * Outputs the opening section of a container.
1933 * @param string $classes A space-separated list of CSS classes
1934 * @param string $id An optional ID
1935 * @return string the HTML to output.
1937 public function container_start($classes = null, $id = null) {
1938 $this->opencontainers->push('container', html_writer::end_tag('div'));
1939 return html_writer::start_tag('div', array('id' => $id,
1940 'class' => renderer_base::prepare_classes($classes)));
1944 * Outputs the closing section of a container.
1945 * @return string the HTML to output.
1947 public function container_end() {
1948 return $this->opencontainers->pop('container');
1952 * Make nested HTML lists out of the items
1954 * The resulting list will look something like this:
1958 * <<li>><div class='tree_item parent'>(item contents)</div>
1960 * <<li>><div class='tree_item'>(item contents)</div><</li>>
1966 * @param array[]tree_item $items
1967 * @param array[string]string $attrs html attributes passed to the top of
1969 * @return string HTML
1971 function tree_block_contents($items, $attrs=array()) {
1972 // exit if empty, we don't want an empty ul element
1973 if (empty($items)) {
1976 // array of nested li elements
1978 foreach ($items as $item) {
1979 // this applies to the li item which contains all child lists too
1980 $content = $item->content($this);
1981 $liclasses = array($item->get_css_type());
1982 if (!$item->forceopen || (!$item->forceopen && $item->collapse) || (count($item->children)==0 && $item->nodetype==navigation_node::NODETYPE_BRANCH)) {
1983 $liclasses[] = 'collapsed';
1985 if ($item->isactive === true) {
1986 $liclasses[] = 'current_branch';
1988 $liattr = array('class'=>join(' ',$liclasses));
1989 // class attribute on the div item which only contains the item content
1990 $divclasses = array('tree_item');
1991 if (!empty($item->children) || $item->nodetype==navigation_node::NODETYPE_BRANCH) {
1992 $divclasses[] = 'branch';
1994 $divclasses[] = 'leaf';
1996 if (!empty($item->classes) && count($item->classes)>0) {
1997 $divclasses[] = join(' ', $item->classes);
1999 $divattr = array('class'=>join(' ', $divclasses));
2000 if (!empty($item->id)) {
2001 $divattr['id'] = $item->id;
2003 $content = html_writer::tag('p', $divattr, $content) . $this->tree_block_contents($item->children);
2004 if (!empty($item->preceedwithhr) && $item->preceedwithhr===true) {
2005 $content = html_writer::tag('hr', array(), null).$content;
2007 $content = html_writer::tag('li', $liattr, $content);
2010 return html_writer::tag('ul', $attrs, implode("\n", $lis));
2014 * Return the navbar content so that it can be echoed out by the layout
2015 * @return string XHTML navbar
2017 public function navbar() {
2018 return $this->page->navbar->content();
2022 * Accessibility: Right arrow-like character is
2023 * used in the breadcrumb trail, course navigation menu
2024 * (previous/next activity), calendar, and search forum block.
2025 * If the theme does not set characters, appropriate defaults
2026 * are set automatically. Please DO NOT
2027 * use < > » - these are confusing for blind users.
2030 public function rarrow() {
2031 return $this->page->theme->rarrow;
2035 * Accessibility: Right arrow-like character is
2036 * used in the breadcrumb trail, course navigation menu
2037 * (previous/next activity), calendar, and search forum block.
2038 * If the theme does not set characters, appropriate defaults
2039 * are set automatically. Please DO NOT
2040 * use < > » - these are confusing for blind users.
2043 public function larrow() {
2044 return $this->page->theme->larrow;
2048 * Returns the colours of the small MP3 player
2051 public function filter_mediaplugin_colors() {
2052 return $this->page->theme->filter_mediaplugin_colors;
2056 * Returns the colours of the big MP3 player
2059 public function resource_mp3player_colors() {
2060 return $this->page->theme->resource_mp3player_colors;
2068 * A renderer that generates output for command-line scripts.
2070 * The implementation of this renderer is probably incomplete.
2072 * @copyright 2009 Tim Hunt
2073 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2076 class core_renderer_cli extends core_renderer {
2078 * Returns the page header.
2079 * @return string HTML fragment
2081 public function header() {
2082 output_starting_hook();
2083 return $this->page->heading . "\n";
2087 * Returns a template fragment representing a Heading.
2088 * @param string $text The text of the heading
2089 * @param int $level The level of importance of the heading
2090 * @param string $classes A space-separated list of CSS classes
2091 * @param string $id An optional ID
2092 * @return string A template fragment for a heading
2094 public function heading($text, $level, $classes = 'main', $id = null) {
2098 return '=>' . $text;
2100 return '-->' . $text;
2107 * Returns a template fragment representing a fatal error.
2108 * @param string $message The message to output
2109 * @param string $moreinfourl URL where more info can be found about the error
2110 * @param string $link Link for the Continue button
2111 * @param array $backtrace The execution backtrace
2112 * @param string $debuginfo Debugging information
2113 * @return string A template fragment for a fatal error
2115 public function fatal_error($message, $moreinfourl, $link, $backtrace, $debuginfo = null) {
2116 $output = "!!! $message !!!\n";
2118 if (debugging('', DEBUG_DEVELOPER)) {
2119 if (!empty($debuginfo)) {
2120 $this->notification($debuginfo, 'notifytiny');
2122 if (!empty($backtrace)) {
2123 $this->notification('Stack trace: ' . format_backtrace($backtrace, true), 'notifytiny');
2129 * Returns a template fragment representing a notification.
2130 * @param string $message The message to include
2131 * @param string $classes A space-separated list of CSS classes
2132 * @return string A template fragment for a notification
2134 public function notification($message, $classes = 'notifyproblem') {
2135 $message = clean_text($message);
2136 if ($classes === 'notifysuccess') {
2137 return "++ $message ++\n";
2139 return "!! $message !!\n";