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 * This file contains the moodle_page class. There is normally a single instance
19 * of this class in the $PAGE global variable. This class is a central repository
20 * of information about the page we are building up to send back to the user.
24 * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
25 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
28 defined('MOODLE_INTERNAL') || die();
31 * $PAGE is a central store of information about the current page we are
32 * generating in response to the user's request.
34 * It does not do very much itself
35 * except keep track of information, however, it serves as the access point to
36 * some more significant components like $PAGE->theme, $PAGE->requires,
39 * @copyright 2009 Tim Hunt
40 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
45 * The following properties are alphabetical. Please keep it that way so that its
48 * @property-read string $activityname The type of activity we are in, for example 'forum' or 'quiz'.
49 * Will be null if this page is not within a module.
50 * @property-read stdClass $activityrecord The row from the activities own database table (for example
51 * the forum or quiz table) that this page belongs to. Will be null
52 * if this page is not within a module.
53 * @property-read array $alternativeversions Mime type => object with ->url and ->title.
54 * @property-read block_manager $blocks The blocks manager object for this page.
55 * @property-read array $blockmanipulations
56 * @property-read string $bodyclasses A string to use within the class attribute on the body tag.
57 * @property-read string $bodyid A string to use as the id of the body tag.
58 * @property-read string $button The HTML to go where the Turn editing on button normally goes.
59 * @property-read bool $cacheable Defaults to true. Set to false to stop the page being cached at all.
60 * @property-read array $categories An array of all the categories the page course belongs to,
61 * starting with the immediately containing category, and working out to
62 * the top-level category. This may be the empty array if we are in the
64 * @property-read mixed $category The category that the page course belongs to.
65 * @property-read cm_info $cm The course_module that this page belongs to. Will be null
66 * if this page is not within a module. This is a full cm object, as loaded
67 * by get_coursemodule_from_id or get_coursemodule_from_instance,
68 * so the extra modname and name fields are present.
69 * @property-read context $context The main context to which this page belongs.
70 * @property-read stdClass $course The current course that we are inside - a row from the
71 * course table. (Also available as $COURSE global.) If we are not inside
72 * an actual course, this will be the site course.
73 * @property-read string $devicetypeinuse The name of the device type in use
74 * @property-read string $docspath The path to the Moodle docs for this page.
75 * @property-read string $focuscontrol The id of the HTML element to be focused when the page has loaded.
76 * @property-read bool $headerprinted True if the page header has already been printed.
77 * @property-read string $heading The main heading that should be displayed at the top of the <body>.
78 * @property-read string $headingmenu The menu (or actions) to display in the heading
79 * @property-read array $layout_options An arrays with options for the layout file.
80 * @property-read array $legacythemeinuse True if the legacy browser theme is in use.
81 * @property-read navbar $navbar The navbar object used to display the navbar
82 * @property-read global_navigation $navigation The navigation structure for this page.
83 * @property-read xml_container_stack $opencontainers Tracks XHTML tags on this page that have been opened but not closed.
84 * mainly for internal use by the rendering code.
85 * @property-read string $pagelayout The general type of page this is. For example 'normal', 'popup', 'home'.
86 * Allows the theme to display things differently, if it wishes to.
87 * @property-read string $pagetype The page type string, should be used as the id for the body tag in the theme.
88 * @property-read int $periodicrefreshdelay The periodic refresh delay to use with meta refresh
89 * @property-read page_requirements_manager $requires Tracks the JavaScript, CSS files, etc. required by this page.
90 * @property-read settings_navigation $settingsnav The settings navigation
91 * @property-read int $state One of the STATE_... constants
92 * @property-read string $subpage The subpage identifier, if any.
93 * @property-read theme_config $theme The theme for this page.
94 * @property-read string $title The title that should go in the <head> section of the HTML of this page.
95 * @property-read moodle_url $url The moodle url object for this page.
99 /** The state of the page before it has printed the header **/
100 const STATE_BEFORE_HEADER = 0;
102 /** The state the page is in temporarily while the header is being printed **/
103 const STATE_PRINTING_HEADER = 1;
105 /** The state the page is in while content is presumably being printed **/
106 const STATE_IN_BODY = 2;
109 * The state the page is when the footer has been printed and its function is
112 const STATE_DONE = 3;
115 * @var int The current state of the page. The state a page is within
116 * determines what actions are possible for it.
118 protected $_state = self::STATE_BEFORE_HEADER;
121 * @var stdClass The course currently associated with this page.
122 * If not has been provided the front page course is used.
124 protected $_course = null;
127 * @var cm_info If this page belongs to a module, this is the cm_info module
128 * description object.
130 protected $_cm = null;
133 * @var stdClass If $_cm is not null, then this will hold the corresponding
134 * row from the modname table. For example, if $_cm->modname is 'quiz', this
135 * will be a row from the quiz table.
137 protected $_module = null;
140 * @var context The context that this page belongs to.
142 protected $_context = null;
145 * @var array This holds any categories that $_course belongs to, starting with the
146 * particular category it belongs to, and working out through any parent
147 * categories to the top level. These are loaded progressively, if needed.
148 * There are three states. $_categories = null initially when nothing is
149 * loaded; $_categories = array($id => $cat, $parentid => null) when we have
150 * loaded $_course->category, but not any parents; and a complete array once
151 * everything is loaded.
153 protected $_categories = null;
156 * @var array An array of CSS classes that should be added to the body tag in HTML.
158 protected $_bodyclasses = array();
161 * @var string The title for the page. Used within the title tag in the HTML head.
163 protected $_title = '';
166 * @var string The string to use as the heading of the page. Shown near the top of the
167 * page within most themes.
169 protected $_heading = '';
172 * @var string The pagetype is used to describe the page and defaults to a representation
173 * of the physical path to the page e.g. my-index, mod-quiz-attempt
175 protected $_pagetype = null;
178 * @var string The pagelayout to use when displaying this page. The
179 * pagelayout needs to have been defined by the theme in use, or one of its
180 * parents. By default base is used however standard is the more common layout.
181 * Note that this gets automatically set by core during operations like
184 protected $_pagelayout = 'base';
187 * @var array List of theme layout options, these are ignored by core.
188 * To be used in individual theme layout files only.
190 protected $_layout_options = null;
193 * @var string An optional arbitrary parameter that can be set on pages where the context
194 * and pagetype is not enough to identify the page.
196 protected $_subpage = '';
199 * @var string Set a different path to use for the 'Moodle docs for this page' link.
200 * By default, it uses the path of the file for instance mod/quiz/attempt.
202 protected $_docspath = null;
205 * @var string A legacy class that will be added to the body tag
207 protected $_legacyclass = null;
210 * @var moodle_url The URL for this page. This is mandatory and must be set
211 * before output is started.
213 protected $_url = null;
216 * @var array An array of links to alternative versions of this page.
217 * Primarily used for RSS versions of the current page.
219 protected $_alternateversions = array();
222 * @var block_manager The blocks manager for this page. It is reponsible for
223 * the blocks and there content on this page.
225 protected $_blocks = null;
228 * @var page_requirements_manager Page requirements manager. It is reponsible
229 * for all JavaScript and CSS resources required by this page.
231 protected $_requires = null;
234 * @var string The capability required by the user in order to edit blocks
235 * and block settings on this page.
237 protected $_blockseditingcap = 'moodle/site:manageblocks';
240 * @var bool An internal flag to record when block actions have been processed.
241 * Remember block actions occur on the current URL and it is important that
242 * even they are never executed more than once.
244 protected $_block_actions_done = false;
247 * @var array An array of any other capabilities the current user must have
248 * in order to editing the page and/or its content (not just blocks).
250 protected $_othereditingcaps = array();
253 * @var bool Sets whether this page should be cached by the browser or not.
254 * If it is set to true (default) the page is served with caching headers.
256 protected $_cacheable = true;
259 * @var string Can be set to the ID of an element on the page, if done that
260 * element receives focus when the page loads.
262 protected $_focuscontrol = '';
265 * @var string HTML to go where the turn on editing button is located. This
266 * is nearly a legacy item and not used very often any more.
268 protected $_button = '';
271 * @var theme_config The theme to use with this page. This has to be properly
272 * initialised via {@link moodle_page::initialise_theme_and_output()} which
273 * happens magically before any operation that requires it.
275 protected $_theme = null;
278 * @var global_navigation Contains the global navigation structure.
280 protected $_navigation = null;
283 * @var settings_navigation Contains the settings navigation structure.
285 protected $_settingsnav = null;
288 * @var navbar Contains the navbar structure.
290 protected $_navbar = null;
293 * @var string The menu (or actions) to display in the heading.
295 protected $_headingmenu = null;
298 * @var array stack trace. Then the theme is initialised, we save the stack
299 * trace, for use in error messages.
301 protected $_wherethemewasinitialised = null;
304 * @var xhtml_container_stack Tracks XHTML tags on this page that have been
305 * opened but not closed.
307 protected $_opencontainers;
310 * @var int Sets the page to refresh after a given delay (in seconds) using
311 * meta refresh in {@link standard_head_html()} in outputlib.php
312 * If set to null(default) the page is not refreshed
314 protected $_periodicrefreshdelay = null;
317 * @var array Associative array of browser shortnames (as used by check_browser_version)
318 * and their minimum required versions
320 protected $_legacybrowsers = array('MSIE' => 6.0);
323 * @var string Is set to the name of the device type in use.
324 * This will we worked out when it is first used.
326 protected $_devicetypeinuse = null;
329 * @var bool Used to determine if HTTPS should be required for login.
331 protected $_https_login_required = false;
334 * @var bool Determines if popup notifications allowed on this page.
335 * Code such as the quiz module disables popup notifications in situations
336 * such as upgrading or completing a quiz.
338 protected $_popup_notification_allowed = true;
340 // Magic getter methods =============================================================
341 // Due to the __get magic below, you normally do not call these as $PAGE->magic_get_x
342 // methods, but instead use the $PAGE->x syntax.
345 * Please do not call this method directly, use the ->state syntax. {@link moodle_page::__get()}.
346 * @return integer one of the STATE_XXX constants. You should not normally need
347 * to use this in your code. It is intended for internal use by this class
348 * and its friends like print_header, to check that everything is working as
349 * expected. Also accessible as $PAGE->state.
351 protected function magic_get_state() {
352 return $this->_state;
356 * Please do not call this method directly, use the ->headerprinted syntax. {@link moodle_page::__get()}.
357 * @return bool has the header already been printed?
359 protected function magic_get_headerprinted() {
360 return $this->_state >= self::STATE_IN_BODY;
364 * Please do not call this method directly, use the ->course syntax. {@link moodle_page::__get()}.
365 * @return stdClass the current course that we are inside - a row from the
366 * course table. (Also available as $COURSE global.) If we are not inside
367 * an actual course, this will be the site course.
369 protected function magic_get_course() {
371 if (is_null($this->_course)) {
374 return $this->_course;
378 * Please do not call this method directly, use the ->cm syntax. {@link moodle_page::__get()}.
379 * @return cm_info the course_module that this page belongs to. Will be null
380 * if this page is not within a module. This is a full cm object, as loaded
381 * by get_coursemodule_from_id or get_coursemodule_from_instance,
382 * so the extra modname and name fields are present.
384 protected function magic_get_cm() {
389 * Please do not call this method directly, use the ->activityrecord syntax. {@link moodle_page::__get()}.
390 * @return stdClass the row from the activities own database table (for example
391 * the forum or quiz table) that this page belongs to. Will be null
392 * if this page is not within a module.
394 protected function magic_get_activityrecord() {
395 if (is_null($this->_module) && !is_null($this->_cm)) {
396 $this->load_activity_record();
398 return $this->_module;
402 * Please do not call this method directly, use the ->activityname syntax. {@link moodle_page::__get()}.
403 * @return string the The type of activity we are in, for example 'forum' or 'quiz'.
404 * Will be null if this page is not within a module.
406 protected function magic_get_activityname() {
407 if (is_null($this->_cm)) {
410 return $this->_cm->modname;
414 * Please do not call this method directly, use the ->category syntax. {@link moodle_page::__get()}.
415 * @return stdClass the category that the page course belongs to. If there isn't one
416 * (that is, if this is the front page course) returns null.
418 protected function magic_get_category() {
419 $this->ensure_category_loaded();
420 if (!empty($this->_categories)) {
421 return reset($this->_categories);
428 * Please do not call this method directly, use the ->categories syntax. {@link moodle_page::__get()}.
429 * @return array an array of all the categories the page course belongs to,
430 * starting with the immediately containing category, and working out to
431 * the top-level category. This may be the empty array if we are in the
434 protected function magic_get_categories() {
435 $this->ensure_categories_loaded();
436 return $this->_categories;
440 * Please do not call this method directly, use the ->context syntax. {@link moodle_page::__get()}.
441 * @return context the main context to which this page belongs.
443 protected function magic_get_context() {
444 if (is_null($this->_context)) {
445 if (CLI_SCRIPT or NO_MOODLE_COOKIES) {
446 // cli scripts work in system context, do not annoy devs with debug info
447 // very few scripts do not use cookies, we can safely use system as default context there
449 debugging('Coding problem: $PAGE->context was not set. You may have forgotten '
450 .'to call require_login() or $PAGE->set_context(). The page may not display '
451 .'correctly as a result');
453 $this->_context = context_system::instance();
455 return $this->_context;
459 * Please do not call this method directly, use the ->pagetype syntax. {@link moodle_page::__get()}.
460 * @return string e.g. 'my-index' or 'mod-quiz-attempt'.
462 protected function magic_get_pagetype() {
464 if (is_null($this->_pagetype) || isset($CFG->pagepath)) {
465 $this->initialise_default_pagetype();
467 return $this->_pagetype;
471 * Please do not call this method directly, use the ->pagetype syntax. {@link moodle_page::__get()}.
472 * @return string The id to use on the body tag, uses {@link magic_get_pagetype()}.
474 protected function magic_get_bodyid() {
475 return 'page-'.$this->pagetype;
479 * Please do not call this method directly, use the ->pagelayout syntax. {@link moodle_page::__get()}.
480 * @return string the general type of page this is. For example 'standard', 'popup', 'home'.
481 * Allows the theme to display things differently, if it wishes to.
483 protected function magic_get_pagelayout() {
484 return $this->_pagelayout;
488 * Please do not call this method directly, use the ->layout_options syntax. {@link moodle_page::__get()}.
489 * @return array returns arrays with options for layout file
491 protected function magic_get_layout_options() {
492 if (!is_array($this->_layout_options)) {
493 $this->_layout_options = $this->_theme->pagelayout_options($this->pagelayout);
495 return $this->_layout_options;
499 * Please do not call this method directly, use the ->subpage syntax. {@link moodle_page::__get()}.
500 * @return string The subpage identifier, if any.
502 protected function magic_get_subpage() {
503 return $this->_subpage;
507 * Please do not call this method directly, use the ->bodyclasses syntax. {@link moodle_page::__get()}.
508 * @return string the class names to put on the body element in the HTML.
510 protected function magic_get_bodyclasses() {
511 return implode(' ', array_keys($this->_bodyclasses));
515 * Please do not call this method directly, use the ->title syntax. {@link moodle_page::__get()}.
516 * @return string the title that should go in the <head> section of the HTML of this page.
518 protected function magic_get_title() {
519 return $this->_title;
523 * Please do not call this method directly, use the ->heading syntax. {@link moodle_page::__get()}.
524 * @return string the main heading that should be displayed at the top of the <body>.
526 protected function magic_get_heading() {
527 return $this->_heading;
531 * Please do not call this method directly, use the ->heading syntax. {@link moodle_page::__get()}.
532 * @return string The menu (or actions) to display in the heading
534 protected function magic_get_headingmenu() {
535 return $this->_headingmenu;
539 * Please do not call this method directly, use the ->docspath syntax. {@link moodle_page::__get()}.
540 * @return string the path to the Moodle docs for this page.
542 protected function magic_get_docspath() {
543 if (is_string($this->_docspath)) {
544 return $this->_docspath;
546 return str_replace('-', '/', $this->pagetype);
551 * Please do not call this method directly, use the ->url syntax. {@link moodle_page::__get()}.
552 * @return moodle_url the clean URL required to load the current page. (You
553 * should normally use this in preference to $ME or $FULLME.)
555 protected function magic_get_url() {
557 if (is_null($this->_url)) {
558 debugging('This page did not call $PAGE->set_url(...). Using '.s($FULLME), DEBUG_DEVELOPER);
559 $this->_url = new moodle_url($FULLME);
560 // Make sure the guessed URL cannot lead to dangerous redirects.
561 $this->_url->remove_params('sesskey');
563 return new moodle_url($this->_url); // Return a clone for safety.
567 * The list of alternate versions of this page.
568 * @return array mime type => object with ->url and ->title.
570 protected function magic_get_alternateversions() {
571 return $this->_alternateversions;
575 * Please do not call this method directly, use the ->blocks syntax. {@link moodle_page::__get()}.
576 * @return blocks_manager the blocks manager object for this page.
578 protected function magic_get_blocks() {
580 if (is_null($this->_blocks)) {
581 if (!empty($CFG->blockmanagerclass)) {
582 if (!empty($CFG->blockmanagerclassfile)) {
583 require_once($CFG->blockmanagerclassfile);
585 $classname = $CFG->blockmanagerclass;
587 $classname = 'block_manager';
589 $this->_blocks = new $classname($this);
591 return $this->_blocks;
595 * Please do not call this method directly, use the ->requires syntax. {@link moodle_page::__get()}.
596 * @return page_requirements_manager tracks the JavaScript, CSS files, etc. required by this page.
598 protected function magic_get_requires() {
600 if (is_null($this->_requires)) {
601 $this->_requires = new page_requirements_manager();
603 return $this->_requires;
607 * Please do not call this method directly, use the ->cacheable syntax. {@link moodle_page::__get()}.
608 * @return bool can this page be cached by the user's browser.
610 protected function magic_get_cacheable() {
611 return $this->_cacheable;
615 * Please do not call this method directly, use the ->focuscontrol syntax. {@link moodle_page::__get()}.
616 * @return string the id of the HTML element to be focused when the page has loaded.
618 protected function magic_get_focuscontrol() {
619 return $this->_focuscontrol;
623 * Please do not call this method directly, use the ->button syntax. {@link moodle_page::__get()}.
624 * @return string the HTML to go where the Turn editing on button normally goes.
626 protected function magic_get_button() {
627 return $this->_button;
631 * Please do not call this method directly, use the ->theme syntax. {@link moodle_page::__get()}.
632 * @return theme_config the initialised theme for this page.
634 protected function magic_get_theme() {
635 if (is_null($this->_theme)) {
636 $this->initialise_theme_and_output();
638 return $this->_theme;
642 * Returns an array of minipulations or false if there are none to make.
647 protected function magic_get_blockmanipulations() {
648 if (!right_to_left()) {
651 if (is_null($this->_theme)) {
652 $this->initialise_theme_and_output();
654 return $this->_theme->blockrtlmanipulations;
658 * Please do not call this method directly, use the ->devicetypeinuse syntax. {@link moodle_page::__get()}.
659 * @return string The device type being used.
661 protected function magic_get_devicetypeinuse() {
662 if (empty($this->_devicetypeinuse)) {
663 $this->_devicetypeinuse = get_user_device_type();
665 return $this->_devicetypeinuse;
669 * Please do not call this method directly use the ->periodicrefreshdelay syntax
670 * {@link moodle_page::__get()}
671 * @return int The periodic refresh delay to use with meta refresh
673 protected function magic_get_periodicrefreshdelay() {
674 return $this->_periodicrefreshdelay;
678 * Please do not call this method directly use the ->opencontainers syntax. {@link moodle_page::__get()}
679 * @return xhtml_container_stack tracks XHTML tags on this page that have been opened but not closed.
680 * mainly for internal use by the rendering code.
682 protected function magic_get_opencontainers() {
683 if (is_null($this->_opencontainers)) {
684 $this->_opencontainers = new xhtml_container_stack();
686 return $this->_opencontainers;
690 * Return the navigation object
691 * @return global_navigation
693 protected function magic_get_navigation() {
694 if ($this->_navigation === null) {
695 $this->_navigation = new global_navigation($this);
697 return $this->_navigation;
701 * Return a navbar object
704 protected function magic_get_navbar() {
705 if ($this->_navbar === null) {
706 $this->_navbar = new navbar($this);
708 return $this->_navbar;
712 * Returns the settings navigation object
713 * @return settings_navigation
715 protected function magic_get_settingsnav() {
716 if ($this->_settingsnav === null) {
717 $this->_settingsnav = new settings_navigation($this);
718 $this->_settingsnav->initialise();
720 return $this->_settingsnav;
724 * PHP overloading magic to make the $PAGE->course syntax work by redirecting
725 * it to the corresponding $PAGE->magic_get_course() method if there is one, and
726 * throwing an exception if not.
728 * @param string $name property name
731 public function __get($name) {
732 $getmethod = 'magic_get_' . $name;
733 if (method_exists($this, $getmethod)) {
734 return $this->$getmethod();
736 throw new coding_exception('Unknown property ' . $name . ' of $PAGE.');
741 * PHP overloading magic to catch obvious coding errors.
743 * This method has been created to catch obvious coding errors where the
744 * developer has tried to set a page property using $PAGE->key = $value.
745 * In the moodle_page class all properties must be set using the appropriate
746 * $PAGE->set_something($value) method.
748 * @param string $name property name
749 * @param mixed $value Value
750 * @return void Throws exception if field not defined in page class
752 public function __set($name, $value) {
753 if (method_exists($this, 'set_' . $name)) {
754 throw new coding_exception('Invalid attempt to modify page object', "Use \$PAGE->set_$name() instead.");
756 throw new coding_exception('Invalid attempt to modify page object', "Unknown property $name");
760 // Other information getting methods ==========================================
763 * Returns instance of page renderer
765 * @param string $component name such as 'core', 'mod_forum' or 'qtype_multichoice'.
766 * @param string $subtype optional subtype such as 'news' resulting to 'mod_forum_news'
767 * @param string $target one of rendering target constants
768 * @return renderer_base
770 public function get_renderer($component, $subtype = null, $target = null) {
771 return $this->magic_get_theme()->get_renderer($this, $component, $subtype, $target);
775 * Checks to see if there are any items on the navbar object
777 * @return bool true if there are, false if not
779 public function has_navbar() {
780 if ($this->_navbar === null) {
781 $this->_navbar = new navbar($this);
783 return $this->_navbar->has_items();
787 * Should the current user see this page in editing mode.
788 * That is, are they allowed to edit this page, and are they currently in
792 public function user_is_editing() {
794 return !empty($USER->editing) && $this->user_allowed_editing();
798 * Does the user have permission to edit blocks on this page.
801 public function user_can_edit_blocks() {
802 return has_capability($this->_blockseditingcap, $this->_context);
806 * Does the user have permission to see this page in editing mode.
809 public function user_allowed_editing() {
810 return has_any_capability($this->all_editing_caps(), $this->_context);
814 * Get a description of this page. Normally displayed in the footer in
815 * developer debug mode.
818 public function debug_summary() {
820 $summary .= 'General type: ' . $this->pagelayout . '. ';
821 if (!during_initial_install()) {
822 $summary .= 'Context ' . $this->context->get_context_name() . ' (context id ' . $this->_context->id . '). ';
824 $summary .= 'Page type ' . $this->pagetype . '. ';
825 if ($this->subpage) {
826 'Sub-page ' . $this->subpage . '. ';
831 // Setter methods =============================================================
834 * Set the state. The state must be one of that STATE_... constants, and
835 * the state is only allowed to advance one step at a time.
837 * @param integer $state The new state.
839 public function set_state($state) {
840 if ($state != $this->_state + 1 || $state > self::STATE_DONE) {
841 throw new coding_exception('Invalid state passed to moodle_page::set_state. We are in state ' .
842 $this->_state . ' and state ' . $state . ' was requested.');
845 if ($state == self::STATE_PRINTING_HEADER) {
846 $this->starting_output();
849 $this->_state = $state;
853 * Set the current course. This sets both $PAGE->course and $COURSE. It also
854 * sets the right theme and locale.
856 * Normally you don't need to call this function yourself, require_login will
857 * call it for you if you pass a $course to it. You can use this function
858 * on pages that do need to call require_login().
860 * Sets $PAGE->context to the course context, if it is not already set.
862 * @param stdClass $course the course to set as the global course.
864 public function set_course($course) {
865 global $COURSE, $PAGE, $CFG, $SITE;
867 if (empty($course->id)) {
868 throw new coding_exception('$course passed to moodle_page::set_course does not look like a proper course object.');
871 $this->ensure_theme_not_set();
873 if (!empty($this->_course->id) && $this->_course->id != $course->id) {
874 $this->_categories = null;
877 $this->_course = clone($course);
879 if ($this === $PAGE) {
880 $COURSE = $this->_course;
884 if (!$this->_context) {
885 $this->set_context(context_course::instance($this->_course->id));
888 // notify course format that this page is set for the course
889 if ($this->_course->id != $SITE->id) {
890 require_once($CFG->dirroot.'/course/lib.php');
891 $courseformat = course_get_format($this->_course);
892 $this->add_body_class('format-'. $courseformat->get_format());
893 $courseformat->page_set_course($this);
895 $this->add_body_class('format-site');
900 * Set the main context to which this page belongs.
902 * @param context $context a context object. You normally get this with context_xxxx::instance().
904 public function set_context($context) {
905 if ($context === null) {
906 // extremely ugly hack which sets context to some value in order to prevent warnings,
907 // use only for core error handling!!!!
908 if (!$this->_context) {
909 $this->_context = context_system::instance();
914 // ideally we should set context only once
915 if (isset($this->_context)) {
916 if ($context->id == $this->_context->id) {
917 // fine - no change needed
918 } else if ($this->_context->contextlevel == CONTEXT_SYSTEM or $this->_context->contextlevel == CONTEXT_COURSE) {
919 // hmm - not ideal, but it might produce too many warnings due to the design of require_login
920 } else if ($this->_context->contextlevel == CONTEXT_MODULE and ($parentcontext = $context->get_parent_context()) and
921 $this->_context->id == $parentcontext->id) {
922 // hmm - most probably somebody did require_login() and after that set the block context
924 // we do not want devs to do weird switching of context levels on the fly,
925 // because we might have used the context already such as in text filter in page title
926 debugging('Coding problem: unsupported modification of PAGE->context from '.$this->_context->contextlevel.' to '.$context->contextlevel);
930 $this->_context = $context;
934 * The course module that this page belongs to (if it does belong to one).
936 * @param stdClass|cm_info $cm a record from course_modules table or cm_info from get_fast_modinfo().
937 * @param stdClass $course
938 * @param stdClass $module
941 public function set_cm($cm, $course = null, $module = null) {
942 global $DB, $CFG, $SITE;
944 if (!isset($cm->id) || !isset($cm->course)) {
945 throw new coding_exception('Invalid $cm parameter for $PAGE object, it has to be instance of cm_info or record from the course_modules table.');
948 if (!$this->_course || $this->_course->id != $cm->course) {
950 $course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
952 if ($course->id != $cm->course) {
953 throw new coding_exception('The course you passed to $PAGE->set_cm does not correspond to the $cm.');
955 $this->set_course($course);
958 // make sure we have a $cm from get_fast_modinfo as this contains activity access details
959 if (!($cm instanceof cm_info)) {
960 $modinfo = get_fast_modinfo($this->_course);
961 $cm = $modinfo->get_cm($cm->id);
965 // unfortunately the context setting is a mess, let's try to work around some common block problems and show some debug messages
966 if (empty($this->_context) or $this->_context->contextlevel != CONTEXT_BLOCK) {
967 $context = context_module::instance($cm->id);
968 $this->set_context($context);
972 $this->set_activity_record($module);
975 // notify course format that this page is set for the course module
976 if ($this->_course->id != $SITE->id) {
977 require_once($CFG->dirroot.'/course/lib.php');
978 course_get_format($this->_course)->page_set_cm($this);
983 * Sets the activity record. This could be a row from the main table for a
984 * module. For instance if the current module (cm) is a forum this should be a row
985 * from the forum table.
987 * @param stdClass $module A row from the main database table for the module that this
991 public function set_activity_record($module) {
992 if (is_null($this->_cm)) {
993 throw new coding_exception('You cannot call $PAGE->set_activity_record until after $PAGE->cm has been set.');
995 if ($module->id != $this->_cm->instance || $module->course != $this->_course->id) {
996 throw new coding_exception('The activity record your are trying to set does not seem to correspond to the cm that has been set.');
998 $this->_module = $module;
1002 * Sets the pagetype to use for this page.
1004 * Normally you do not need to set this manually, it is automatically created
1005 * from the script name. However, on some pages this is overridden.
1006 * For example the page type for course/view.php includes the course format,
1007 * for example 'course-view-weeks'. This gets used as the id attribute on
1008 * <body> and also for determining which blocks are displayed.
1010 * @param string $pagetype e.g. 'my-index' or 'mod-quiz-attempt'.
1012 public function set_pagetype($pagetype) {
1013 $this->_pagetype = $pagetype;
1017 * Sets the layout to use for this page.
1019 * The page layout determines how the page will be displayed, things such as
1020 * block regions, content areas, etc are controlled by the layout.
1021 * The theme in use for the page will determine that the layout contains.
1023 * This properly defaults to 'base', so you only need to call this function if
1024 * you want something different. The exact range of supported layouts is specified
1025 * in the standard theme.
1027 * For an idea of the common page layouts see
1028 * {@link http://docs.moodle.org/dev/Themes_2.0#The_different_layouts_as_of_August_17th.2C_2010}
1029 * But please keep in mind that it may be (and normally is) out of date.
1030 * The only place to find an accurate up-to-date list of the page layouts
1031 * available for your version of Moodle is {@link theme/base/config.php}
1033 * @param string $pagelayout the page layout this is. For example 'popup', 'home'.
1035 public function set_pagelayout($pagelayout) {
1037 * Uncomment this to debug theme pagelayout issues like missing blocks.
1039 * if (!empty($this->_wherethemewasinitialised) && $pagelayout != $this->_pagelayout) {
1040 * debugging('Page layout has already been set and cannot be changed.', DEBUG_DEVELOPER);
1043 $this->_pagelayout = $pagelayout;
1047 * If context->id and pagetype are not enough to uniquely identify this page,
1048 * then you can set a subpage id as well. For example, the tags page sets
1050 * @param string $subpage an arbitrary identifier that, along with context->id
1051 * and pagetype, uniquely identifies this page.
1053 public function set_subpage($subpage) {
1054 if (empty($subpage)) {
1055 $this->_subpage = '';
1057 $this->_subpage = $subpage;
1062 * Adds a CSS class to the body tag of the page.
1064 * @param string $class add this class name ot the class attribute on the body tag.
1066 public function add_body_class($class) {
1067 if ($this->_state > self::STATE_BEFORE_HEADER) {
1068 throw new coding_exception('Cannot call moodle_page::add_body_class after output has been started.');
1070 $this->_bodyclasses[$class] = 1;
1074 * Adds an array of body classes to the body tag of this page.
1076 * @param array $classes this utility method calls add_body_class for each array element.
1078 public function add_body_classes($classes) {
1079 foreach ($classes as $class) {
1080 $this->add_body_class($class);
1085 * Sets the title for the page.
1086 * This is normally used within the title tag in the head of the page.
1088 * @param string $title the title that should go in the <head> section of the HTML of this page.
1090 public function set_title($title) {
1091 $title = format_string($title);
1092 $title = strip_tags($title);
1093 $title = str_replace('"', '"', $title);
1094 $this->_title = $title;
1098 * Sets the heading to use for the page.
1099 * This is normally used as the main heading at the top of the content.
1101 * @param string $heading the main heading that should be displayed at the top of the <body>.
1103 public function set_heading($heading) {
1104 $this->_heading = format_string($heading);
1108 * Sets some HTML to use next to the heading {@link moodle_page::set_heading()}
1110 * @param string $menu The menu/content to show in the heading
1112 public function set_headingmenu($menu) {
1113 $this->_headingmenu = $menu;
1117 * Set the course category this page belongs to manually.
1119 * This automatically sets $PAGE->course to be the site course. You cannot
1120 * use this method if you have already set $PAGE->course - in that case,
1121 * the category must be the one that the course belongs to. This also
1122 * automatically sets the page context to the category context.
1124 * @param integer $categoryid The id of the category to set.
1126 public function set_category_by_id($categoryid) {
1128 if (!is_null($this->_course)) {
1129 throw new coding_exception('Attempt to manually set the course category when the course has been set. This is not allowed.');
1131 if (is_array($this->_categories)) {
1132 throw new coding_exception('Course category has already been set. You are not allowed to change it.');
1134 $this->ensure_theme_not_set();
1135 $this->set_course($SITE);
1136 $this->load_category($categoryid);
1137 $this->set_context(context_coursecat::instance($categoryid));
1141 * Set a different path to use for the 'Moodle docs for this page' link.
1143 * By default, it uses the pagetype, which is normally the same as the
1144 * script name. So, for example, for mod/quiz/attempt.php, pagetype is
1145 * mod-quiz-attempt, and so docspath is mod/quiz/attempt.
1147 * @param string $path the path to use at the end of the moodle docs URL.
1149 public function set_docs_path($path) {
1150 $this->_docspath = $path;
1154 * You should call this method from every page to set the cleaned-up URL
1155 * that should be used to return to this page.
1157 * Used, for example, by the blocks editing UI to know where to return the
1158 * user after an action.
1159 * For example, course/view.php does:
1160 * $id = optional_param('id', 0, PARAM_INT);
1161 * $PAGE->set_url('/course/view.php', array('id' => $id));
1163 * @param moodle_url|string $url URL relative to $CFG->wwwroot or {@link moodle_url} instance
1164 * @param array $params parameters to add to the URL
1166 public function set_url($url, array $params = null) {
1169 if (is_string($url)) {
1170 if (strpos($url, 'http') === 0) {
1172 } else if (strpos($url, '/') === 0) {
1173 // we have to use httpswwwroot here, because of loginhttps pages
1174 $url = $CFG->httpswwwroot . $url;
1176 throw new coding_exception('Invalid parameter $url, has to be full url or in shortened form starting with /.');
1180 $this->_url = new moodle_url($url, $params);
1182 $fullurl = $this->_url->out_omit_querystring();
1183 if (strpos($fullurl, "$CFG->httpswwwroot/") !== 0) {
1184 debugging('Most probably incorrect set_page() url argument, it does not match the httpswwwroot!');
1186 $shorturl = str_replace("$CFG->httpswwwroot/", '', $fullurl);
1188 if (is_null($this->_pagetype)) {
1189 $this->initialise_default_pagetype($shorturl);
1194 * Make sure page URL does not contain the given URL parameter.
1196 * This should not be necessary if the script has called set_url properly.
1197 * However, in some situations like the block editing actions; when the URL
1198 * has been guessed, it will contain dangerous block-related actions.
1199 * Therefore, the blocks code calls this function to clean up such parameters
1200 * before doing any redirect.
1202 * @param string $param the name of the parameter to make sure is not in the
1205 public function ensure_param_not_in_url($param) {
1206 $discard = $this->url; // Make sure $this->url is lazy-loaded;
1207 $this->_url->remove_params($param);
1211 * There can be alternate versions of some pages (for example an RSS feed version).
1212 * If such other version exist, call this method, and a link to the alternate
1213 * version will be included in the <head> of the page.
1215 * @param string $title The title to give the alternate version.
1216 * @param string|moodle_url $url The URL of the alternate version.
1217 * @param string $mimetype The mime-type of the alternate version.
1219 public function add_alternate_version($title, $url, $mimetype) {
1220 if ($this->_state > self::STATE_BEFORE_HEADER) {
1221 throw new coding_exception('Cannot call moodle_page::add_alternate_version after output has been started.');
1223 $alt = new stdClass;
1224 $alt->title = $title;
1226 $this->_alternateversions[$mimetype] = $alt;
1230 * Specify a form control should be focused when the page has loaded.
1232 * @param string $controlid the id of the HTML element to be focused.
1234 public function set_focuscontrol($controlid) {
1235 $this->_focuscontrol = $controlid;
1239 * Specify a fragment of HTML that goes where the 'Turn editing on' button normally goes.
1241 * @param string $html the HTML to display there.
1243 public function set_button($html) {
1244 $this->_button = $html;
1248 * Set the capability that allows users to edit blocks on this page.
1250 * Normally the default of 'moodle/site:manageblocks' is used, but a few
1251 * pages like the My Moodle page need to use a different capability
1252 * like 'moodle/my:manageblocks'.
1254 * @param string $capability a capability.
1256 public function set_blocks_editing_capability($capability) {
1257 $this->_blockseditingcap = $capability;
1261 * Some pages let you turn editing on for reasons other than editing blocks.
1262 * If that is the case, you can pass other capabilities that let the user
1263 * edit this page here.
1265 * @param string|array $capability either a capability, or an array of capabilities.
1267 public function set_other_editing_capability($capability) {
1268 if (is_array($capability)) {
1269 $this->_othereditingcaps = array_unique($this->_othereditingcaps + $capability);
1271 $this->_othereditingcaps[] = $capability;
1276 * Sets whether the browser should cache this page or not.
1278 * @return bool $cacheable can this page be cached by the user's browser.
1280 public function set_cacheable($cacheable) {
1281 $this->_cacheable = $cacheable;
1285 * Sets the page to periodically refresh
1287 * This function must be called before $OUTPUT->header has been called or
1288 * a coding exception will be thrown.
1290 * @param int $delay Sets the delay before refreshing the page, if set to null
1291 * refresh is cancelled
1293 public function set_periodic_refresh_delay($delay=null) {
1294 if ($this->_state > self::STATE_BEFORE_HEADER) {
1295 throw new coding_exception('You cannot set a periodic refresh delay after the header has been printed');
1297 if ($delay===null) {
1298 $this->_periodicrefreshdelay = null;
1299 } else if (is_int($delay)) {
1300 $this->_periodicrefreshdelay = $delay;
1305 * Force this page to use a particular theme.
1307 * Please use this cautiously.
1308 * It is only intended to be used by the themes selector admin page.
1310 * @param string $themename the name of the theme to use.
1312 public function force_theme($themename) {
1313 $this->ensure_theme_not_set();
1314 $this->_theme = theme_config::load($themename);
1318 * Reload theme settings.
1320 * This is used when we need to reset settings
1321 * because they are now double cached in theme.
1323 public function reload_theme() {
1324 if (!is_null($this->_theme)) {
1325 $this->_theme = theme_config::load($this->_theme->name);
1330 * This function indicates that current page requires the https
1331 * when $CFG->loginhttps enabled.
1333 * By using this function properly, we can ensure 100% https-ized pages
1334 * at our entire discretion (login, forgot_password, change_password)
1337 public function https_required() {
1340 if (!is_null($this->_url)) {
1341 throw new coding_exception('https_required() must be used before setting page url!');
1344 $this->ensure_theme_not_set();
1346 $this->_https_login_required = true;
1348 if (!empty($CFG->loginhttps)) {
1349 $CFG->httpswwwroot = str_replace('http:', 'https:', $CFG->wwwroot);
1351 $CFG->httpswwwroot = $CFG->wwwroot;
1356 * Makes sure that page previously marked with https_required()
1357 * is really using https://, if not it redirects to https://
1359 * @return void (may redirect to https://self)
1361 public function verify_https_required() {
1362 global $CFG, $FULLME;
1364 if (is_null($this->_url)) {
1365 throw new coding_exception('verify_https_required() must be called after setting page url!');
1368 if (!$this->_https_login_required) {
1369 throw new coding_exception('verify_https_required() must be called only after https_required()!');
1372 if (empty($CFG->loginhttps)) {
1373 // https not required, so stop checking
1377 if (strpos($this->_url, 'https://')) {
1378 // detect if incorrect PAGE->set_url() used, it is recommended to use root-relative paths there
1379 throw new coding_exception('Invalid page url specified, it must start with https:// for pages that set https_required()!');
1382 if (!empty($CFG->sslproxy)) {
1383 // it does not make much sense to use sslproxy and loginhttps at the same time
1387 // now the real test and redirect!
1388 // NOTE: do NOT use this test for detection of https on current page because this code is not compatible with SSL proxies,
1389 // instead use strpos($CFG->httpswwwroot, 'https:') === 0
1390 if (strpos($FULLME, 'https:') !== 0) {
1391 // this may lead to infinite redirect on misconfigured sites, in that case use $CFG->loginhttps=0; in /config.php
1392 redirect($this->_url);
1396 // Initialisation methods =====================================================
1397 // These set various things up in a default way.
1400 * This method is called when the page first moves out of the STATE_BEFORE_HEADER
1401 * state. This is our last change to initialise things.
1403 protected function starting_output() {
1406 if (!during_initial_install()) {
1407 $this->blocks->load_blocks();
1408 if (empty($this->_block_actions_done)) {
1409 $this->_block_actions_done = true;
1410 if ($this->blocks->process_url_actions($this)) {
1411 redirect($this->url->out(false));
1414 $this->blocks->create_all_block_instances();
1417 // If maintenance mode is on, change the page header.
1418 if (!empty($CFG->maintenance_enabled)) {
1419 $this->set_button('<a href="' . $CFG->wwwroot . '/' . $CFG->admin .
1420 '/settings.php?section=maintenancemode">' . get_string('maintenancemode', 'admin') .
1421 '</a> ' . $this->button);
1423 $title = $this->title;
1427 $this->set_title($title . get_string('maintenancemode', 'admin'));
1429 // Show the messaging popup if there are messages
1430 message_popup_window();
1433 $this->initialise_standard_body_classes();
1437 * Method for use by Moodle core to set up the theme. Do not
1438 * use this in your own code.
1440 * Make sure the right theme for this page is loaded. Tell our
1441 * blocks_manager about the theme block regions, and then, if
1442 * we are $PAGE, set up the global $OUTPUT.
1446 public function initialise_theme_and_output() {
1447 global $OUTPUT, $PAGE, $SITE, $CFG;
1449 if (!empty($this->_wherethemewasinitialised)) {
1453 if (!during_initial_install()) {
1454 // detect PAGE->context mess
1455 $this->magic_get_context();
1458 if (!$this->_course && !during_initial_install()) {
1459 $this->set_course($SITE);
1462 if (is_null($this->_theme)) {
1463 $themename = $this->resolve_theme();
1464 $this->_theme = theme_config::load($themename);
1467 $this->_theme->setup_blocks($this->pagelayout, $this->blocks);
1468 if ($this->_theme->enable_dock && !empty($CFG->allowblockstodock)) {
1469 $this->requires->strings_for_js(array('addtodock', 'undockitem', 'dockblock', 'undockblock', 'undockall', 'hidedockpanel', 'hidepanel'), 'block');
1470 $this->requires->string_for_js('thisdirectionvertical', 'langconfig');
1471 $this->requires->yui_module('moodle-core-dock-loader', 'M.core.dock.loader.initLoader');
1474 if ($this === $PAGE) {
1475 $OUTPUT = $this->get_renderer('core');
1478 $this->_wherethemewasinitialised = debug_backtrace();
1482 * Work out the theme this page should use.
1484 * This depends on numerous $CFG settings, and the properties of this page.
1486 * @return string the name of the theme that should be used on this page.
1488 protected function resolve_theme() {
1489 global $CFG, $USER, $SESSION;
1491 if (empty($CFG->themeorder)) {
1492 $themeorder = array('course', 'category', 'session', 'user', 'site');
1494 $themeorder = $CFG->themeorder;
1495 // Just in case, make sure we always use the site theme if nothing else matched.
1496 $themeorder[] = 'site';
1499 $mnetpeertheme = '';
1500 if (isloggedin() and isset($CFG->mnet_localhost_id) and $USER->mnethostid != $CFG->mnet_localhost_id) {
1501 require_once($CFG->dirroot.'/mnet/peer.php');
1502 $mnetpeer = new mnet_peer();
1503 $mnetpeer->set_id($USER->mnethostid);
1504 if ($mnetpeer->force_theme == 1 && $mnetpeer->theme != '') {
1505 $mnetpeertheme = $mnetpeer->theme;
1509 foreach ($themeorder as $themetype) {
1510 switch ($themetype) {
1512 if (!empty($CFG->allowcoursethemes) && !empty($this->_course->theme) && $this->devicetypeinuse == 'default') {
1513 return $this->_course->theme;
1518 if (!empty($CFG->allowcategorythemes) && $this->devicetypeinuse == 'default') {
1519 $categories = $this->categories;
1520 foreach ($categories as $category) {
1521 if (!empty($category->theme)) {
1522 return $category->theme;
1529 if (!empty($SESSION->theme)) {
1530 return $SESSION->theme;
1535 if (!empty($CFG->allowuserthemes) && !empty($USER->theme) && $this->devicetypeinuse == 'default') {
1536 if ($mnetpeertheme) {
1537 return $mnetpeertheme;
1539 return $USER->theme;
1545 if ($mnetpeertheme) {
1546 return $mnetpeertheme;
1548 // First try for the device the user is using.
1549 $devicetheme = get_selected_theme_for_device_type($this->devicetypeinuse);
1550 if (!empty($devicetheme)) {
1551 return $devicetheme;
1553 // Next try for the default device (as a fallback)
1554 $devicetheme = get_selected_theme_for_device_type('default');
1555 if (!empty($devicetheme)) {
1556 return $devicetheme;
1558 // The default device theme isn't set up - use the overall default theme.
1559 return theme_config::DEFAULT_THEME;
1566 * Sets ->pagetype from the script name. For example, if the script that was
1567 * run is mod/quiz/view.php, ->pagetype will be set to 'mod-quiz-view'.
1569 * @param string $script the path to the script that should be used to
1570 * initialise ->pagetype. If not passed the $SCRIPT global will be used.
1571 * If legacy code has set $CFG->pagepath that will be used instead, and a
1572 * developer warning issued.
1574 protected function initialise_default_pagetype($script = null) {
1575 global $CFG, $SCRIPT;
1577 if (isset($CFG->pagepath)) {
1578 debugging('Some code appears to have set $CFG->pagepath. That was a horrible deprecated thing. ' .
1579 'Don\'t do it! Try calling $PAGE->set_pagetype() instead.');
1580 $script = $CFG->pagepath;
1581 unset($CFG->pagepath);
1584 if (is_null($script)) {
1585 $script = ltrim($SCRIPT, '/');
1586 $len = strlen($CFG->admin);
1587 if (substr($script, 0, $len) == $CFG->admin) {
1588 $script = 'admin' . substr($script, $len);
1592 $path = str_replace('.php', '', $script);
1593 if (substr($path, -1) == '/') {
1597 if (empty($path) || $path == 'index') {
1598 $this->_pagetype = 'site-index';
1600 $this->_pagetype = str_replace('/', '-', $path);
1605 * Initialises the CSS classes that will be added to body tag of the page.
1607 * The function is responsible for adding all of the critical CSS classes
1608 * that describe the current page, and its state.
1609 * This includes classes that describe the following for example:
1610 * - Current language
1611 * - Language direction
1612 * - YUI CSS initialisation
1614 * These are commonly used in CSS to target specific types of pages.
1616 protected function initialise_standard_body_classes() {
1619 $pagetype = $this->pagetype;
1620 if ($pagetype == 'site-index') {
1621 $this->_legacyclass = 'course';
1622 } else if (substr($pagetype, 0, 6) == 'admin-') {
1623 $this->_legacyclass = 'admin';
1625 $this->add_body_class($this->_legacyclass);
1627 $pathbits = explode('-', trim($pagetype));
1628 for ($i=1;$i<count($pathbits);$i++) {
1629 $this->add_body_class('path-'.join('-',array_slice($pathbits, 0, $i)));
1632 $this->add_body_classes(get_browser_version_classes());
1633 $this->add_body_class('dir-' . get_string('thisdirection', 'langconfig'));
1634 $this->add_body_class('lang-' . current_language());
1635 $this->add_body_class('yui-skin-sam'); // Make YUI happy, if it is used.
1636 $this->add_body_class('yui3-skin-sam'); // Make YUI3 happy, if it is used.
1637 $this->add_body_class($this->url_to_class_name($CFG->wwwroot));
1639 $this->add_body_class('pagelayout-' . $this->_pagelayout); // extra class describing current page layout
1641 if (!during_initial_install()) {
1642 $this->add_body_class('course-' . $this->_course->id);
1643 $this->add_body_class('context-' . $this->_context->id);
1646 if (!empty($this->_cm)) {
1647 $this->add_body_class('cmid-' . $this->_cm->id);
1650 if (!empty($CFG->allowcategorythemes)) {
1651 $this->ensure_category_loaded();
1652 foreach ($this->_categories as $catid => $notused) {
1653 $this->add_body_class('category-' . $catid);
1657 if (is_array($this->_categories)) {
1658 $catids = array_keys($this->_categories);
1659 $catid = reset($catids);
1660 } else if (!empty($this->_course->category)) {
1661 $catid = $this->_course->category;
1664 $this->add_body_class('category-' . $catid);
1668 if (!isloggedin()) {
1669 $this->add_body_class('notloggedin');
1672 if (!empty($USER->editing)) {
1673 $this->add_body_class('editing');
1674 if (optional_param('bui_moveid', false, PARAM_INT)) {
1675 $this->add_body_class('blocks-moving');
1679 if (!empty($CFG->blocksdrag)) {
1680 $this->add_body_class('drag');
1683 if ($this->_devicetypeinuse != 'default') {
1684 $this->add_body_class($this->_devicetypeinuse . 'theme');
1689 * Loads the activity record for the current CM object associated with this
1692 * This will load {@link moodle_page::$_module} with a row from the related
1693 * module table in the database.
1694 * For instance if {@link moodle_page::$_cm} is a forum then a row from the
1695 * forum table will be loaded.
1697 protected function load_activity_record() {
1699 if (is_null($this->_cm)) {
1702 $this->_module = $DB->get_record($this->_cm->modname, array('id' => $this->_cm->instance));
1706 * This function ensures that the category of the current course has been
1707 * loaded, and if not, the function loads it now.
1710 * @throws coding_exception
1712 protected function ensure_category_loaded() {
1713 if (is_array($this->_categories)) {
1714 return; // Already done.
1716 if (is_null($this->_course)) {
1717 throw new coding_exception('Attempt to get the course category for this page before the course was set.');
1719 if ($this->_course->category == 0) {
1720 $this->_categories = array();
1722 $this->load_category($this->_course->category);
1727 * Loads the requested category into the pages categories array.
1729 * @param ing $categoryid
1730 * @throws moodle_exception
1732 protected function load_category($categoryid) {
1734 $category = $DB->get_record('course_categories', array('id' => $categoryid));
1736 throw new moodle_exception('unknowncategory');
1738 $this->_categories[$category->id] = $category;
1739 $parentcategoryids = explode('/', trim($category->path, '/'));
1740 array_pop($parentcategoryids);
1741 foreach (array_reverse($parentcategoryids) as $catid) {
1742 $this->_categories[$catid] = null;
1747 * Ensures that the category the current course is within, as well as all of
1748 * its parent categories, have been loaded.
1752 protected function ensure_categories_loaded() {
1754 $this->ensure_category_loaded();
1755 if (!is_null(end($this->_categories))) {
1756 return; // Already done.
1758 $idstoload = array_keys($this->_categories);
1759 array_shift($idstoload);
1760 $categories = $DB->get_records_list('course_categories', 'id', $idstoload);
1761 foreach ($idstoload as $catid) {
1762 $this->_categories[$catid] = $categories[$catid];
1767 * Ensure the theme has not been loaded yet. If it has an exception is thrown.
1770 * @throws coding_exception
1772 protected function ensure_theme_not_set() {
1773 if (!is_null($this->_theme)) {
1774 throw new coding_exception('The theme has already been set up for this page ready for output. ' .
1775 'Therefore, you can no longer change the theme, or anything that might affect what ' .
1776 'the current theme is, for example, the course.',
1777 'Stack trace when the theme was set up: ' . format_backtrace($this->_wherethemewasinitialised));
1782 * Converts the provided URL into a CSS class that be used within the page.
1783 * This is primarily used to add the wwwroot to the body tag as a CSS class.
1785 * @param string $url
1788 protected function url_to_class_name($url) {
1789 $bits = parse_url($url);
1790 $class = str_replace('.', '-', $bits['host']);
1791 if (!empty($bits['port'])) {
1792 $class .= '--' . $bits['port'];
1794 if (!empty($bits['path'])) {
1795 $path = trim($bits['path'], '/');
1797 $class .= '--' . str_replace('/', '-', $path);
1804 * Combines all of the required editing caps for the page and returns them
1809 protected function all_editing_caps() {
1810 $caps = $this->_othereditingcaps;
1811 $caps[] = $this->_blockseditingcap;
1816 * Returns true if the page URL has beem set.
1820 public function has_set_url() {
1821 return ($this->_url!==null);
1825 * Gets set when the block actions for the page have been processed.
1827 * @param bool $setting
1829 public function set_block_actions_done($setting = true) {
1830 $this->_block_actions_done = $setting;
1834 * Are popup notifications allowed on this page?
1835 * Popup notifications may be disallowed in situations such as while upgrading or completing a quiz
1837 * @return bool true if popup notifications may be displayed
1839 public function get_popup_notification_allowed() {
1840 return $this->_popup_notification_allowed;
1844 * Allow or disallow popup notifications on this page. Popups are allowed by default.
1846 * @param bool $allowed true if notifications are allowed. False if not allowed. They are allowed by default.
1848 public function set_popup_notification_allowed($allowed) {
1849 $this->_popup_notification_allowed = $allowed;
1853 * Returns the block region having made any required theme manipulations.
1856 * @param string $region
1859 public function apply_theme_region_manipulations($region) {
1860 if ($this->blockmanipulations && isset($this->blockmanipulations[$region])) {
1861 $regionwas = $region;
1862 $regionnow = $this->blockmanipulations[$region];
1863 if ($this->blocks->is_known_region($regionwas) && $this->blocks->is_known_region($regionnow)) {
1864 // Both the before and after regions are known so we can swap them over.
1867 // We didn't know about both, we won't swap them over.