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moodle/lib/pagelib.php

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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* This file contains the moodle_page class. There is normally a single instance
* of this class in the $PAGE global variable. This class is a central repository
* of information about the page we are building up to send back to the user.
*
* @package core
* @category page
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* $PAGE is a central store of information about the current page we are
* generating in response to the user's request.
*
* It does not do very much itself
* except keep track of information, however, it serves as the access point to
* some more significant components like $PAGE->theme, $PAGE->requires,
* $PAGE->blocks, etc.
*
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.0
* @package core
* @category page
*
* The following properties are alphabetical. Please keep it that way so that its
* easy to maintain.
*
* @property-read string $activityname The type of activity we are in, for example 'forum' or 'quiz'.
* Will be null if this page is not within a module.
* @property-read stdClass $activityrecord The row from the activities own database table (for example
* the forum or quiz table) that this page belongs to. Will be null
* if this page is not within a module.
* @property-read array $alternativeversions Mime type => object with ->url and ->title.
* @property-read block_manager $blocks The blocks manager object for this page.
* @property-read array $blockmanipulations
* @property-read string $bodyclasses A string to use within the class attribute on the body tag.
* @property-read string $bodyid A string to use as the id of the body tag.
* @property-read string $button The HTML to go where the Turn editing on button normally goes.
* @property-read bool $cacheable Defaults to true. Set to false to stop the page being cached at all.
* @property-read array $categories An array of all the categories the page course belongs to,
* starting with the immediately containing category, and working out to
* the top-level category. This may be the empty array if we are in the
* front page course.
* @property-read mixed $category The category that the page course belongs to.
* @property-read cm_info $cm The course_module that this page belongs to. Will be null
* if this page is not within a module. This is a full cm object, as loaded
* by get_coursemodule_from_id or get_coursemodule_from_instance,
* so the extra modname and name fields are present.
* @property-read context $context The main context to which this page belongs.
* @property-read stdClass $course The current course that we are inside - a row from the
* course table. (Also available as $COURSE global.) If we are not inside
* an actual course, this will be the site course.
* @property-read string $devicetypeinuse The name of the device type in use
* @property-read string $docspath The path to the Moodle docs for this page.
* @property-read string $focuscontrol The id of the HTML element to be focused when the page has loaded.
* @property-read bool $headerprinted True if the page header has already been printed.
* @property-read string $heading The main heading that should be displayed at the top of the <body>.
* @property-read string $headingmenu The menu (or actions) to display in the heading
* @property-read array $layout_options An arrays with options for the layout file.
* @property-read array $legacythemeinuse True if the legacy browser theme is in use.
* @property-read navbar $navbar The navbar object used to display the navbar
* @property-read global_navigation $navigation The navigation structure for this page.
* @property-read xhtml_container_stack $opencontainers Tracks XHTML tags on this page that have been opened but not closed.
* mainly for internal use by the rendering code.
* @property-read string $pagelayout The general type of page this is. For example 'normal', 'popup', 'home'.
* Allows the theme to display things differently, if it wishes to.
* @property-read string $pagetype The page type string, should be used as the id for the body tag in the theme.
* @property-read int $periodicrefreshdelay The periodic refresh delay to use with meta refresh
* @property-read page_requirements_manager $requires Tracks the JavaScript, CSS files, etc. required by this page.
* @property-read string $requestip The IP address of the current request, null if unknown.
* @property-read string $requestorigin The type of request 'web', 'ws', 'cli', 'restore', etc.
* @property-read settings_navigation $settingsnav The settings navigation
* @property-read int $state One of the STATE_... constants
* @property-read string $subpage The subpage identifier, if any.
* @property-read theme_config $theme The theme for this page.
* @property-read string $title The title that should go in the <head> section of the HTML of this page.
* @property-read moodle_url $url The moodle url object for this page.
*/
class moodle_page {
/** The state of the page before it has printed the header **/
const STATE_BEFORE_HEADER = 0;
/** The state the page is in temporarily while the header is being printed **/
const STATE_PRINTING_HEADER = 1;
/** The state the page is in while content is presumably being printed **/
const STATE_IN_BODY = 2;
/**
* The state the page is when the footer has been printed and its function is
* complete.
*/
const STATE_DONE = 3;
/**
* @var int The current state of the page. The state a page is within
* determines what actions are possible for it.
*/
protected $_state = self::STATE_BEFORE_HEADER;
/**
* @var stdClass The course currently associated with this page.
* If not has been provided the front page course is used.
*/
protected $_course = null;
/**
* @var cm_info If this page belongs to a module, this is the cm_info module
* description object.
*/
protected $_cm = null;
/**
* @var stdClass If $_cm is not null, then this will hold the corresponding
* row from the modname table. For example, if $_cm->modname is 'quiz', this
* will be a row from the quiz table.
*/
protected $_module = null;
/**
* @var context The context that this page belongs to.
*/
protected $_context = null;
/**
* @var array This holds any categories that $_course belongs to, starting with the
* particular category it belongs to, and working out through any parent
* categories to the top level. These are loaded progressively, if needed.
* There are three states. $_categories = null initially when nothing is
* loaded; $_categories = array($id => $cat, $parentid => null) when we have
* loaded $_course->category, but not any parents; and a complete array once
* everything is loaded.
*/
protected $_categories = null;
/**
* @var array An array of CSS classes that should be added to the body tag in HTML.
*/
protected $_bodyclasses = array();
/**
* @var string The title for the page. Used within the title tag in the HTML head.
*/
protected $_title = '';
/**
* @var string The string to use as the heading of the page. Shown near the top of the
* page within most themes.
*/
protected $_heading = '';
/**
* @var string The pagetype is used to describe the page and defaults to a representation
* of the physical path to the page e.g. my-index, mod-quiz-attempt
*/
protected $_pagetype = null;
/**
* @var string The pagelayout to use when displaying this page. The
* pagelayout needs to have been defined by the theme in use, or one of its
* parents. By default base is used however standard is the more common layout.
* Note that this gets automatically set by core during operations like
* require_login.
*/
protected $_pagelayout = 'base';
/**
* @var array List of theme layout options, these are ignored by core.
* To be used in individual theme layout files only.
*/
protected $_layout_options = null;
/**
* @var string An optional arbitrary parameter that can be set on pages where the context
* and pagetype is not enough to identify the page.
*/
protected $_subpage = '';
/**
* @var string Set a different path to use for the 'Moodle docs for this page' link.
* By default, it uses the path of the file for instance mod/quiz/attempt.
*/
protected $_docspath = null;
/**
* @var string A legacy class that will be added to the body tag
*/
protected $_legacyclass = null;
/**
* @var moodle_url The URL for this page. This is mandatory and must be set
* before output is started.
*/
protected $_url = null;
/**
* @var array An array of links to alternative versions of this page.
* Primarily used for RSS versions of the current page.
*/
protected $_alternateversions = array();
/**
* @var block_manager The blocks manager for this page. It is responsible for
* the blocks and there content on this page.
*/
protected $_blocks = null;
/**
* @var page_requirements_manager Page requirements manager. It is responsible
* for all JavaScript and CSS resources required by this page.
*/
protected $_requires = null;
/** @var page_requirements_manager Saves the requirement manager object used before switching to to fragments one. */
protected $savedrequires = null;
/**
* @var string The capability required by the user in order to edit blocks
* and block settings on this page.
*/
protected $_blockseditingcap = 'moodle/site:manageblocks';
/**
* @var bool An internal flag to record when block actions have been processed.
* Remember block actions occur on the current URL and it is important that
* even they are never executed more than once.
*/
protected $_block_actions_done = false;
/**
* @var array An array of any other capabilities the current user must have
* in order to editing the page and/or its content (not just blocks).
*/
protected $_othereditingcaps = array();
/**
* @var bool Sets whether this page should be cached by the browser or not.
* If it is set to true (default) the page is served with caching headers.
*/
protected $_cacheable = true;
/**
* @var string Can be set to the ID of an element on the page, if done that
* element receives focus when the page loads.
*/
protected $_focuscontrol = '';
/**
* @var string HTML to go where the turn on editing button is located. This
* is nearly a legacy item and not used very often any more.
*/
protected $_button = '';
/**
* @var theme_config The theme to use with this page. This has to be properly
* initialised via {@link moodle_page::initialise_theme_and_output()} which
* happens magically before any operation that requires it.
*/
protected $_theme = null;
/**
* @var global_navigation Contains the global navigation structure.
*/
protected $_navigation = null;
/**
* @var settings_navigation Contains the settings navigation structure.
*/
protected $_settingsnav = null;
/**
* @var flat_navigation Contains a list of nav nodes, most closely related to the current page.
*/
protected $_flatnav = null;
/**
* @var navbar Contains the navbar structure.
*/
protected $_navbar = null;
/**
* @var string The menu (or actions) to display in the heading.
*/
protected $_headingmenu = null;
/**
* @var array stack trace. Then the theme is initialised, we save the stack
* trace, for use in error messages.
*/
protected $_wherethemewasinitialised = null;
/**
* @var xhtml_container_stack Tracks XHTML tags on this page that have been
* opened but not closed.
*/
protected $_opencontainers;
/**
* @var int Sets the page to refresh after a given delay (in seconds) using
* meta refresh in {@link standard_head_html()} in outputlib.php
* If set to null(default) the page is not refreshed
*/
protected $_periodicrefreshdelay = null;
/**
* @var array Associative array of browser shortnames (as used by check_browser_version)
* and their minimum required versions
*/
protected $_legacybrowsers = array('MSIE' => 6.0);
/**
* @var string Is set to the name of the device type in use.
* This will we worked out when it is first used.
*/
protected $_devicetypeinuse = null;
/**
* @var bool Used to determine if HTTPS should be required for login.
*/
protected $_https_login_required = false;
/**
* @var bool Determines if popup notifications allowed on this page.
* Code such as the quiz module disables popup notifications in situations
* such as upgrading or completing a quiz.
*/
protected $_popup_notification_allowed = true;
/**
* @var bool Is the settings menu being forced to display on this page (activities / resources only).
* This is only used by themes that use the settings menu.
*/
protected $_forcesettingsmenu = false;
/**
* Force the settings menu to be displayed on this page. This will only force the
* settings menu on an activity / resource page that is being displayed on a theme that
* uses a settings menu.
*
* @param bool $forced default of true, can be sent false to turn off the force.
*/
public function force_settings_menu($forced = true) {
$this->_forcesettingsmenu = $forced;
}
/**
* Check to see if the settings menu is forced to display on this activity / resource page.
* This only applies to themes that use the settings menu.
*
* @return bool True if the settings menu is forced to display.
*/
public function is_settings_menu_forced() {
return $this->_forcesettingsmenu;
}
// Magic getter methods =============================================================
// Due to the __get magic below, you normally do not call these as $PAGE->magic_get_x
// methods, but instead use the $PAGE->x syntax.
/**
* Please do not call this method directly, use the ->state syntax. {@link moodle_page::__get()}.
* @return integer one of the STATE_XXX constants. You should not normally need
* to use this in your code. It is intended for internal use by this class
* and its friends like print_header, to check that everything is working as
* expected. Also accessible as $PAGE->state.
*/
protected function magic_get_state() {
return $this->_state;
}
/**
* Please do not call this method directly, use the ->headerprinted syntax. {@link moodle_page::__get()}.
* @return bool has the header already been printed?
*/
protected function magic_get_headerprinted() {
return $this->_state >= self::STATE_IN_BODY;
}
/**
* Please do not call this method directly, use the ->course syntax. {@link moodle_page::__get()}.
* @return stdClass the current course that we are inside - a row from the
* course table. (Also available as $COURSE global.) If we are not inside
* an actual course, this will be the site course.
*/
protected function magic_get_course() {
global $SITE;
if (is_null($this->_course)) {
return $SITE;
}
return $this->_course;
}
/**
* Please do not call this method directly, use the ->cm syntax. {@link moodle_page::__get()}.
* @return cm_info the course_module that this page belongs to. Will be null
* if this page is not within a module. This is a full cm object, as loaded
* by get_coursemodule_from_id or get_coursemodule_from_instance,
* so the extra modname and name fields are present.
*/
protected function magic_get_cm() {
return $this->_cm;
}
/**
* Please do not call this method directly, use the ->activityrecord syntax. {@link moodle_page::__get()}.
* @return stdClass the row from the activities own database table (for example
* the forum or quiz table) that this page belongs to. Will be null
* if this page is not within a module.
*/
protected function magic_get_activityrecord() {
if (is_null($this->_module) && !is_null($this->_cm)) {
$this->load_activity_record();
}
return $this->_module;
}
/**
* Please do not call this method directly, use the ->activityname syntax. {@link moodle_page::__get()}.
* @return string the The type of activity we are in, for example 'forum' or 'quiz'.
* Will be null if this page is not within a module.
*/
protected function magic_get_activityname() {
if (is_null($this->_cm)) {
return null;
}
return $this->_cm->modname;
}
/**
* Please do not call this method directly, use the ->category syntax. {@link moodle_page::__get()}.
* @return stdClass the category that the page course belongs to. If there isn't one
* (that is, if this is the front page course) returns null.
*/
protected function magic_get_category() {
$this->ensure_category_loaded();
if (!empty($this->_categories)) {
return reset($this->_categories);
} else {
return null;
}
}
/**
* Please do not call this method directly, use the ->categories syntax. {@link moodle_page::__get()}.
* @return array an array of all the categories the page course belongs to,
* starting with the immediately containing category, and working out to
* the top-level category. This may be the empty array if we are in the
* front page course.
*/
protected function magic_get_categories() {
$this->ensure_categories_loaded();
return $this->_categories;
}
/**
* Please do not call this method directly, use the ->context syntax. {@link moodle_page::__get()}.
* @return context the main context to which this page belongs.
*/
protected function magic_get_context() {
global $CFG;
if (is_null($this->_context)) {
if (CLI_SCRIPT or NO_MOODLE_COOKIES) {
// Cli scripts work in system context, do not annoy devs with debug info.
// Very few scripts do not use cookies, we can safely use system as default context there.
} else if (AJAX_SCRIPT && $CFG->debugdeveloper) {
// Throw exception inside AJAX script in developer mode, otherwise the debugging message may be missed.
throw new coding_exception('$PAGE->context was not set. You may have forgotten '
.'to call require_login() or $PAGE->set_context()');
} else {
debugging('Coding problem: $PAGE->context was not set. You may have forgotten '
.'to call require_login() or $PAGE->set_context(). The page may not display '
.'correctly as a result');
}
$this->_context = context_system::instance();
}
return $this->_context;
}
/**
* Please do not call this method directly, use the ->pagetype syntax. {@link moodle_page::__get()}.
* @return string e.g. 'my-index' or 'mod-quiz-attempt'.
*/
protected function magic_get_pagetype() {
global $CFG;
if (is_null($this->_pagetype) || isset($CFG->pagepath)) {
$this->initialise_default_pagetype();
}
return $this->_pagetype;
}
/**
* Please do not call this method directly, use the ->pagetype syntax. {@link moodle_page::__get()}.
* @return string The id to use on the body tag, uses {@link magic_get_pagetype()}.
*/
protected function magic_get_bodyid() {
return 'page-'.$this->pagetype;
}
/**
* Please do not call this method directly, use the ->pagelayout syntax. {@link moodle_page::__get()}.
* @return string the general type of page this is. For example 'standard', 'popup', 'home'.
* Allows the theme to display things differently, if it wishes to.
*/
protected function magic_get_pagelayout() {
return $this->_pagelayout;
}
/**
* Please do not call this method directly, use the ->layout_options syntax. {@link moodle_page::__get()}.
* @return array returns arrays with options for layout file
*/
protected function magic_get_layout_options() {
if (!is_array($this->_layout_options)) {
$this->_layout_options = $this->_theme->pagelayout_options($this->pagelayout);
}
return $this->_layout_options;
}
/**
* Please do not call this method directly, use the ->subpage syntax. {@link moodle_page::__get()}.
* @return string The subpage identifier, if any.
*/
protected function magic_get_subpage() {
return $this->_subpage;
}
/**
* Please do not call this method directly, use the ->bodyclasses syntax. {@link moodle_page::__get()}.
* @return string the class names to put on the body element in the HTML.
*/
protected function magic_get_bodyclasses() {
return implode(' ', array_keys($this->_bodyclasses));
}
/**
* Please do not call this method directly, use the ->title syntax. {@link moodle_page::__get()}.
* @return string the title that should go in the <head> section of the HTML of this page.
*/
protected function magic_get_title() {
return $this->_title;
}
/**
* Please do not call this method directly, use the ->heading syntax. {@link moodle_page::__get()}.
* @return string the main heading that should be displayed at the top of the <body>.
*/
protected function magic_get_heading() {
return $this->_heading;
}
/**
* Please do not call this method directly, use the ->heading syntax. {@link moodle_page::__get()}.
* @return string The menu (or actions) to display in the heading
*/
protected function magic_get_headingmenu() {
return $this->_headingmenu;
}
/**
* Please do not call this method directly, use the ->docspath syntax. {@link moodle_page::__get()}.
* @return string the path to the Moodle docs for this page.
*/
protected function magic_get_docspath() {
if (is_string($this->_docspath)) {
return $this->_docspath;
} else {
return str_replace('-', '/', $this->pagetype);
}
}
/**
* Please do not call this method directly, use the ->url syntax. {@link moodle_page::__get()}.
* @return moodle_url the clean URL required to load the current page. (You
* should normally use this in preference to $ME or $FULLME.)
*/
protected function magic_get_url() {
global $FULLME;
if (is_null($this->_url)) {
debugging('This page did not call $PAGE->set_url(...). Using '.s($FULLME), DEBUG_DEVELOPER);
$this->_url = new moodle_url($FULLME);
// Make sure the guessed URL cannot lead to dangerous redirects.
$this->_url->remove_params('sesskey');
}
return new moodle_url($this->_url); // Return a clone for safety.
}
/**
* The list of alternate versions of this page.
* @return array mime type => object with ->url and ->title.
*/
protected function magic_get_alternateversions() {
return $this->_alternateversions;
}
/**
* Please do not call this method directly, use the ->blocks syntax. {@link moodle_page::__get()}.
* @return block_manager the blocks manager object for this page.
*/
protected function magic_get_blocks() {
global $CFG;
if (is_null($this->_blocks)) {
if (!empty($CFG->blockmanagerclass)) {
if (!empty($CFG->blockmanagerclassfile)) {
require_once($CFG->blockmanagerclassfile);
}
$classname = $CFG->blockmanagerclass;
} else {
$classname = 'block_manager';
}
$this->_blocks = new $classname($this);
}
return $this->_blocks;
}
/**
* Please do not call this method directly, use the ->requires syntax. {@link moodle_page::__get()}.
* @return page_requirements_manager tracks the JavaScript, CSS files, etc. required by this page.
*/
protected function magic_get_requires() {
if (is_null($this->_requires)) {
$this->_requires = new page_requirements_manager();
}
return $this->_requires;
}
/**
* Please do not call this method directly, use the ->cacheable syntax. {@link moodle_page::__get()}.
* @return bool can this page be cached by the user's browser.
*/
protected function magic_get_cacheable() {
return $this->_cacheable;
}
/**
* Please do not call this method directly, use the ->focuscontrol syntax. {@link moodle_page::__get()}.
* @return string the id of the HTML element to be focused when the page has loaded.
*/
protected function magic_get_focuscontrol() {
return $this->_focuscontrol;
}
/**
* Please do not call this method directly, use the ->button syntax. {@link moodle_page::__get()}.
* @return string the HTML to go where the Turn editing on button normally goes.
*/
protected function magic_get_button() {
return $this->_button;
}
/**
* Please do not call this method directly, use the ->theme syntax. {@link moodle_page::__get()}.
* @return theme_config the initialised theme for this page.
*/
protected function magic_get_theme() {
if (is_null($this->_theme)) {
$this->initialise_theme_and_output();
}
return $this->_theme;
}
/**
* Returns an array of minipulations or false if there are none to make.
*
* @since Moodle 2.5.1 2.6
* @return bool|array
*/
protected function magic_get_blockmanipulations() {
if (!right_to_left()) {
return false;
}
if (is_null($this->_theme)) {
$this->initialise_theme_and_output();
}
return $this->_theme->blockrtlmanipulations;
}
/**
* Please do not call this method directly, use the ->devicetypeinuse syntax. {@link moodle_page::__get()}.
* @return string The device type being used.
*/
protected function magic_get_devicetypeinuse() {
if (empty($this->_devicetypeinuse)) {
$this->_devicetypeinuse = core_useragent::get_user_device_type();
}
return $this->_devicetypeinuse;
}
/**
* Please do not call this method directly use the ->periodicrefreshdelay syntax
* {@link moodle_page::__get()}
* @return int The periodic refresh delay to use with meta refresh
*/
protected function magic_get_periodicrefreshdelay() {
return $this->_periodicrefreshdelay;
}
/**
* Please do not call this method directly use the ->opencontainers syntax. {@link moodle_page::__get()}
* @return xhtml_container_stack tracks XHTML tags on this page that have been opened but not closed.
* mainly for internal use by the rendering code.
*/
protected function magic_get_opencontainers() {
if (is_null($this->_opencontainers)) {
$this->_opencontainers = new xhtml_container_stack();
}
return $this->_opencontainers;
}
/**
* Return the navigation object
* @return global_navigation
*/
protected function magic_get_navigation() {
if ($this->_navigation === null) {
$this->_navigation = new global_navigation($this);
}
return $this->_navigation;
}
/**
* Return a navbar object
* @return navbar
*/
protected function magic_get_navbar() {
if ($this->_navbar === null) {
$this->_navbar = new navbar($this);
}
return $this->_navbar;
}
/**
* Returns the settings navigation object
* @return settings_navigation
*/
protected function magic_get_settingsnav() {
if ($this->_settingsnav === null) {
$this->_settingsnav = new settings_navigation($this);
$this->_settingsnav->initialise();
}
return $this->_settingsnav;
}
/**
* Returns the flat navigation object
* @return flat_navigation
*/
protected function magic_get_flatnav() {
if ($this->_flatnav === null) {
$this->_flatnav = new flat_navigation($this);
$this->_flatnav->initialise();
}
return $this->_flatnav;
}
/**
* Returns request IP address.
*
* @return string IP address or null if unknown
*/
protected function magic_get_requestip() {
return getremoteaddr(null);
}
/**
* Returns the origin of current request.
*
* Note: constants are not required because we need to use these values in logging and reports.
*
* @return string 'web', 'ws', 'cli', 'restore', etc.
*/
protected function magic_get_requestorigin() {
if (class_exists('restore_controller', false) && restore_controller::is_executing()) {
return 'restore';
}
if (WS_SERVER) {
return 'ws';
}
if (CLI_SCRIPT) {
return 'cli';
}
return 'web';
}
/**
* PHP overloading magic to make the $PAGE->course syntax work by redirecting
* it to the corresponding $PAGE->magic_get_course() method if there is one, and
* throwing an exception if not.
*
* @param string $name property name
* @return mixed
* @throws coding_exception
*/
public function __get($name) {
$getmethod = 'magic_get_' . $name;
if (method_exists($this, $getmethod)) {
return $this->$getmethod();
} else {
throw new coding_exception('Unknown property ' . $name . ' of $PAGE.');
}
}
/**
* PHP overloading magic to catch obvious coding errors.
*
* This method has been created to catch obvious coding errors where the
* developer has tried to set a page property using $PAGE->key = $value.
* In the moodle_page class all properties must be set using the appropriate
* $PAGE->set_something($value) method.
*
* @param string $name property name
* @param mixed $value Value
* @return void Throws exception if field not defined in page class
* @throws coding_exception
*/
public function __set($name, $value) {
if (method_exists($this, 'set_' . $name)) {
throw new coding_exception('Invalid attempt to modify page object', "Use \$PAGE->set_$name() instead.");
} else {
throw new coding_exception('Invalid attempt to modify page object', "Unknown property $name");
}
}
// Other information getting methods ==========================================.
/**
* Returns instance of page renderer
*
* @param string $component name such as 'core', 'mod_forum' or 'qtype_multichoice'.
* @param string $subtype optional subtype such as 'news' resulting to 'mod_forum_news'
* @param string $target one of rendering target constants
* @return renderer_base
*/
public function get_renderer($component, $subtype = null, $target = null) {
if ($this->pagelayout === 'maintenance') {
// If the page is using the maintenance layout then we're going to force target to maintenance.
// This leads to a special core renderer that is designed to block access to API's that are likely unavailable for this
// page layout.
$target = RENDERER_TARGET_MAINTENANCE;
}
return $this->magic_get_theme()->get_renderer($this, $component, $subtype, $target);
}
/**
* Checks to see if there are any items on the navbar object
*
* @return bool true if there are, false if not
*/
public function has_navbar() {
if ($this->_navbar === null) {
$this->_navbar = new navbar($this);
}
return $this->_navbar->has_items();
}
/**
* Switches from the regular requirements manager to the fragment requirements manager to
* capture all necessary JavaScript to display a chunk of HTML such as an mform. This is for use
* by the get_fragment() web service and not for use elsewhere.
*/
public function start_collecting_javascript_requirements() {
global $CFG;
require_once($CFG->libdir.'/outputfragmentrequirementslib.php');
// Check that the requirements manager has not already been switched.
if (get_class($this->_requires) == 'fragment_requirements_manager') {
throw new coding_exception('JavaScript collection has already been started.');
}
// The header needs to have been called to flush out the generic JavaScript for the page. This allows only
// JavaScript for the fragment to be collected. _wherethemewasinitialised is set when header() is called.
if (!empty($this->_wherethemewasinitialised)) {
// Change the current requirements manager over to the fragment manager to capture JS.
$this->savedrequires = $this->_requires;
$this->_requires = new fragment_requirements_manager();
} else {
throw new coding_exception('$OUTPUT->header() needs to be called before collecting JavaScript requirements.');
}
}
/**
* Switches back from collecting fragment JS requirement to the original requirement manager
*/
public function end_collecting_javascript_requirements() {
if ($this->savedrequires === null) {
throw new coding_exception('JavaScript collection has not been started.');
}
$this->_requires = $this->savedrequires;
$this->savedrequires = null;
}
/**
* Should the current user see this page in editing mode.
* That is, are they allowed to edit this page, and are they currently in
* editing mode.
* @return bool
*/
public function user_is_editing() {
global $USER;
return !empty($USER->editing) && $this->user_allowed_editing();
}
/**
* Does the user have permission to edit blocks on this page.
* @return bool
*/
public function user_can_edit_blocks() {
return has_capability($this->_blockseditingcap, $this->_context);
}
/**
* Does the user have permission to see this page in editing mode.
* @return bool
*/
public function user_allowed_editing() {
return has_any_capability($this->all_editing_caps(), $this->_context);
}
/**
* Get a description of this page. Normally displayed in the footer in developer debug mode.
* @return string
*/
public function debug_summary() {
$summary = '';
$summary .= 'General type: ' . $this->pagelayout . '. ';
if (!during_initial_install()) {
$summary .= 'Context ' . $this->context->get_context_name() . ' (context id ' . $this->_context->id . '). ';
}
$summary .= 'Page type ' . $this->pagetype . '. ';
if ($this->subpage) {
$summary .= 'Sub-page ' . $this->subpage . '. ';
}
return $summary;
}
// Setter methods =============================================================.
/**
* Set the state.
*
* The state must be one of that STATE_... constants, and the state is only allowed to advance one step at a time.
*
* @param int $state The new state.
* @throws coding_exception
*/
public function set_state($state) {
if ($state != $this->_state + 1 || $state > self::STATE_DONE) {
throw new coding_exception('Invalid state passed to moodle_page::set_state. We are in state ' .
$this->_state . ' and state ' . $state . ' was requested.');
}
if ($state == self::STATE_PRINTING_HEADER) {
$this->starting_output();
}
$this->_state = $state;
}
/**
* Set the current course. This sets both $PAGE->course and $COURSE. It also
* sets the right theme and locale.
*
* Normally you don't need to call this function yourself, require_login will
* call it for you if you pass a $course to it. You can use this function
* on pages that do need to call require_login().
*
* Sets $PAGE->context to the course context, if it is not already set.
*
* @param stdClass $course the course to set as the global course.
* @throws coding_exception
*/
public function set_course($course) {
global $COURSE, $PAGE, $CFG, $SITE;
if (empty($course->id)) {
throw new coding_exception('$course passed to moodle_page::set_course does not look like a proper course object.');
}
$this->ensure_theme_not_set();
if (!empty($this->_course->id) && $this->_course->id != $course->id) {
$this->_categories = null;
}
$this->_course = clone($course);
if ($this === $PAGE) {
$COURSE = $this->_course;
moodle_setlocale();
}
if (!$this->_context) {
$this->set_context(context_course::instance($this->_course->id));
}
// Notify course format that this page is set for the course.
if ($this->_course->id != $SITE->id) {
require_once($CFG->dirroot.'/course/lib.php');
$courseformat = course_get_format($this->_course);
$this->add_body_class('format-'. $courseformat->get_format());
$courseformat->page_set_course($this);
} else {
$this->add_body_class('format-site');
}
}
/**
* Set the main context to which this page belongs.
*
* @param context $context a context object. You normally get this with context_xxxx::instance().
*/
public function set_context($context) {
if ($context === null) {
// Extremely ugly hack which sets context to some value in order to prevent warnings,
// use only for core error handling!!!!
if (!$this->_context) {
$this->_context = context_system::instance();
}
return;
}
// Ideally we should set context only once.
if (isset($this->_context) && $context->id !== $this->_context->id) {
$current = $this->_context->contextlevel;
if ($current == CONTEXT_SYSTEM or $current == CONTEXT_COURSE) {
// Hmm - not ideal, but it might produce too many warnings due to the design of require_login.
} else if ($current == CONTEXT_MODULE and ($parentcontext = $context->get_parent_context()) and
$this->_context->id == $parentcontext->id) {
// Hmm - most probably somebody did require_login() and after that set the block context.
} else {
// We do not want devs to do weird switching of context levels on the fly because we might have used
// the context already such as in text filter in page title.
debugging("Coding problem: unsupported modification of PAGE->context from {$current} to {$context->contextlevel}");
}
}
$this->_context = $context;
}
/**
* The course module that this page belongs to (if it does belong to one).
*
* @param stdClass|cm_info $cm a record from course_modules table or cm_info from get_fast_modinfo().
* @param stdClass $course
* @param stdClass $module
* @return void
* @throws coding_exception
*/
public function set_cm($cm, $course = null, $module = null) {
global $DB, $CFG, $SITE;
if (!isset($cm->id) || !isset($cm->course)) {
throw new coding_exception('Invalid $cm. It has to be instance of cm_info or record from the course_modules table.');
}
if (!$this->_course || $this->_course->id != $cm->course) {
if (!$course) {
$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
}
if ($course->id != $cm->course) {
throw new coding_exception('The course you passed to $PAGE->set_cm does not correspond to the $cm.');
}
$this->set_course($course);
}
// Make sure we have a $cm from get_fast_modinfo as this contains activity access details.
if (!($cm instanceof cm_info)) {
$modinfo = get_fast_modinfo($this->_course);
$cm = $modinfo->get_cm($cm->id);
}
$this->_cm = $cm;
// Unfortunately the context setting is a mess.
// Let's try to work around some common block problems and show some debug messages.
if (empty($this->_context) or $this->_context->contextlevel != CONTEXT_BLOCK) {
$context = context_module::instance($cm->id);
$this->set_context($context);
}
if ($module) {
$this->set_activity_record($module);
}
// Notify course format that this page is set for the course module.
if ($this->_course->id != $SITE->id) {
require_once($CFG->dirroot.'/course/lib.php');
course_get_format($this->_course)->page_set_cm($this);
}
}
/**
* Sets the activity record. This could be a row from the main table for a
* module. For instance if the current module (cm) is a forum this should be a row
* from the forum table.
*
* @param stdClass $module A row from the main database table for the module that this page belongs to.
* @throws coding_exception
*/
public function set_activity_record($module) {
if (is_null($this->_cm)) {
throw new coding_exception('You cannot call $PAGE->set_activity_record until after $PAGE->cm has been set.');
}
if ($module->id != $this->_cm->instance || $module->course != $this->_course->id) {
throw new coding_exception('The activity record does not seem to correspond to the cm that has been set.');
}
$this->_module = $module;
}
/**
* Sets the pagetype to use for this page.
*
* Normally you do not need to set this manually, it is automatically created
* from the script name. However, on some pages this is overridden.
* For example the page type for course/view.php includes the course format,
* for example 'course-view-weeks'. This gets used as the id attribute on
* <body> and also for determining which blocks are displayed.
*
* @param string $pagetype e.g. 'my-index' or 'mod-quiz-attempt'.
*/
public function set_pagetype($pagetype) {
$this->_pagetype = $pagetype;
}
/**
* Sets the layout to use for this page.
*
* The page layout determines how the page will be displayed, things such as
* block regions, content areas, etc are controlled by the layout.
* The theme in use for the page will determine that the layout contains.
*
* This properly defaults to 'base', so you only need to call this function if
* you want something different. The exact range of supported layouts is specified
* in the standard theme.
*
* For an idea of the common page layouts see
* {@link http://docs.moodle.org/dev/Themes_2.0#The_different_layouts_as_of_August_17th.2C_2010}
* But please keep in mind that it may be (and normally is) out of date.
* The only place to find an accurate up-to-date list of the page layouts
* available for your version of Moodle is {@link theme/base/config.php}
*
* @param string $pagelayout the page layout this is. For example 'popup', 'home'.
*/
public function set_pagelayout($pagelayout) {
global $SESSION;
if (!empty($SESSION->forcepagelayout)) {
$this->_pagelayout = $SESSION->forcepagelayout;
} else {
// Uncomment this to debug theme pagelayout issues like missing blocks.
// if (!empty($this->_wherethemewasinitialised) && $pagelayout != $this->_pagelayout)
// debugging('Page layout has already been set and cannot be changed.', DEBUG_DEVELOPER);
$this->_pagelayout = $pagelayout;
}
}
/**
* If context->id and pagetype are not enough to uniquely identify this page,
* then you can set a subpage id as well. For example, the tags page sets
*
* @param string $subpage an arbitrary identifier that, along with context->id
* and pagetype, uniquely identifies this page.
*/
public function set_subpage($subpage) {
if (empty($subpage)) {
$this->_subpage = '';
} else {
$this->_subpage = $subpage;
}
}
/**
* Adds a CSS class to the body tag of the page.
*
* @param string $class add this class name ot the class attribute on the body tag.
* @throws coding_exception
*/
public function add_body_class($class) {
if ($this->_state > self::STATE_BEFORE_HEADER) {
throw new coding_exception('Cannot call moodle_page::add_body_class after output has been started.');
}
$this->_bodyclasses[$class] = 1;
}
/**
* Adds an array of body classes to the body tag of this page.
*
* @param array $classes this utility method calls add_body_class for each array element.
*/
public function add_body_classes($classes) {
foreach ($classes as $class) {
$this->add_body_class($class);
}
}
/**
* Sets the title for the page.
* This is normally used within the title tag in the head of the page.
*
* @param string $title the title that should go in the <head> section of the HTML of this page.
*/
public function set_title($title) {
$title = format_string($title);
$title = strip_tags($title);
$title = str_replace('"', '&quot;', $title);
$this->_title = $title;
}
/**
* Sets the heading to use for the page.
* This is normally used as the main heading at the top of the content.
*
* @param string $heading the main heading that should be displayed at the top of the <body>.
*/
public function set_heading($heading) {
$this->_heading = format_string($heading);
}
/**
* Sets some HTML to use next to the heading {@link moodle_page::set_heading()}
*
* @param string $menu The menu/content to show in the heading
*/
public function set_headingmenu($menu) {
$this->_headingmenu = $menu;
}
/**
* Set the course category this page belongs to manually.
*
* This automatically sets $PAGE->course to be the site course. You cannot
* use this method if you have already set $PAGE->course - in that case,
* the category must be the one that the course belongs to. This also
* automatically sets the page context to the category context.
*
* @param int $categoryid The id of the category to set.
* @throws coding_exception
*/
public function set_category_by_id($categoryid) {
global $SITE;
if (!is_null($this->_course)) {
throw new coding_exception('Course has already been set. You cannot change the category now.');
}
if (is_array($this->_categories)) {
throw new coding_exception('Course category has already been set. You cannot to change it now.');
}
$this->ensure_theme_not_set();
$this->set_course($SITE);
$this->load_category($categoryid);
$this->set_context(context_coursecat::instance($categoryid));
}
/**
* Set a different path to use for the 'Moodle docs for this page' link.
*
* By default, it uses the pagetype, which is normally the same as the
* script name. So, for example, for mod/quiz/attempt.php, pagetype is
* mod-quiz-attempt, and so docspath is mod/quiz/attempt.
*
* @param string $path the path to use at the end of the moodle docs URL.
*/
public function set_docs_path($path) {
$this->_docspath = $path;
}
/**
* You should call this method from every page to set the URL that should be used to return to this page.
*
* Used, for example, by the blocks editing UI to know where to return the
* user after an action.
* For example, course/view.php does:
* $id = optional_param('id', 0, PARAM_INT);
* $PAGE->set_url('/course/view.php', array('id' => $id));
*
* @param moodle_url|string $url URL relative to $CFG->wwwroot or {@link moodle_url} instance
* @param array $params parameters to add to the URL
* @throws coding_exception
*/
public function set_url($url, array $params = null) {
global $CFG;
if (is_string($url) && strpos($url, 'http') !== 0) {
if (strpos($url, '/') === 0) {
// Add the wwwroot to the relative url.
$url = $CFG->wwwroot . $url;
} else {
throw new coding_exception('Invalid parameter $url, has to be full url or in shortened form starting with /.');
}
}
$this->_url = new moodle_url($url, $params);
$fullurl = $this->_url->out_omit_querystring();
if (strpos($fullurl, "$CFG->wwwroot/") !== 0) {
debugging('Most probably incorrect set_page() url argument, it does not match the wwwroot!');
}
$shorturl = str_replace("$CFG->wwwroot/", '', $fullurl);
if (is_null($this->_pagetype)) {
$this->initialise_default_pagetype($shorturl);
}
}
/**
* Make sure page URL does not contain the given URL parameter.
*
* This should not be necessary if the script has called set_url properly.
* However, in some situations like the block editing actions; when the URL
* has been guessed, it will contain dangerous block-related actions.
* Therefore, the blocks code calls this function to clean up such parameters
* before doing any redirect.
*
* @param string $param the name of the parameter to make sure is not in the
* page URL.
*/
public function ensure_param_not_in_url($param) {
$this->_url->remove_params($param);
}
/**
* Sets an alternative version of this page.
*
* There can be alternate versions of some pages (for example an RSS feed version).
* Call this method for each alternative version available.
* For each alternative version a link will be included in the <head> tag.
*
* @param string $title The title to give the alternate version.
* @param string|moodle_url $url The URL of the alternate version.
* @param string $mimetype The mime-type of the alternate version.
* @throws coding_exception
*/
public function add_alternate_version($title, $url, $mimetype) {
if ($this->_state > self::STATE_BEFORE_HEADER) {
throw new coding_exception('Cannot call moodle_page::add_alternate_version after output has been started.');
}
$alt = new stdClass;
$alt->title = $title;
$alt->url = $url;
$this->_alternateversions[$mimetype] = $alt;
}
/**
* Specify a form control should be focused when the page has loaded.
*
* @param string $controlid the id of the HTML element to be focused.
*/
public function set_focuscontrol($controlid) {
$this->_focuscontrol = $controlid;
}
/**
* Specify a fragment of HTML that goes where the 'Turn editing on' button normally goes.
*
* @param string $html the HTML to display there.
*/
public function set_button($html) {
$this->_button = $html;
}
/**
* Set the capability that allows users to edit blocks on this page.
*
* Normally the default of 'moodle/site:manageblocks' is used, but a few
* pages like the My Moodle page need to use a different capability
* like 'moodle/my:manageblocks'.
*
* @param string $capability a capability.
*/
public function set_blocks_editing_capability($capability) {
$this->_blockseditingcap = $capability;
}
/**
* Some pages let you turn editing on for reasons other than editing blocks.
* If that is the case, you can pass other capabilities that let the user
* edit this page here.
*
* @param string|array $capability either a capability, or an array of capabilities.
*/
public function set_other_editing_capability($capability) {
if (is_array($capability)) {
$this->_othereditingcaps = array_unique($this->_othereditingcaps + $capability);
} else {
$this->_othereditingcaps[] = $capability;
}
}
/**
* Sets whether the browser should cache this page or not.
*
* @param bool $cacheable can this page be cached by the user's browser.
*/
public function set_cacheable($cacheable) {
$this->_cacheable = $cacheable;
}
/**
* Sets the page to periodically refresh
*
* This function must be called before $OUTPUT->header has been called or
* a coding exception will be thrown.
*
* @param int $delay Sets the delay before refreshing the page, if set to null refresh is cancelled.
* @throws coding_exception
*/
public function set_periodic_refresh_delay($delay = null) {
if ($this->_state > self::STATE_BEFORE_HEADER) {
throw new coding_exception('You cannot set a periodic refresh delay after the header has been printed');
}
if ($delay === null) {
$this->_periodicrefreshdelay = null;
} else if (is_int($delay)) {
$this->_periodicrefreshdelay = $delay;
}
}
/**
* Force this page to use a particular theme.
*
* Please use this cautiously.
* It is only intended to be used by the themes selector admin page.
*
* @param string $themename the name of the theme to use.
*/
public function force_theme($themename) {
$this->ensure_theme_not_set();
$this->_theme = theme_config::load($themename);
}
/**
* Reload theme settings.
*
* This is used when we need to reset settings
* because they are now double cached in theme.
*/
public function reload_theme() {
if (!is_null($this->_theme)) {
$this->_theme = theme_config::load($this->_theme->name);
}
}
/**
* This function indicates that current page requires the https when $CFG->loginhttps enabled.
* Since loginhttps was removed this is no longer required or functional.
*
* @deprecated since Moodle 3.4 MDL-42834 - please do not use this function any more.
* @todo MDL-46267 This will be deleted in Moodle 3.8
*
* @throws coding_exception
*/
public function https_required() {
debugging('https_required() has been deprecated. It no longer needs to be called.', DEBUG_DEVELOPER);
}
/**
* Makes sure that page previously marked with https_required() is really using https://, if not it redirects to https://
* Since loginhttps was removed this is no longer required or functional.
*
* @deprecated since Moodle 3.4 MDL-42834 - please do not use this function any more.
* @todo MDL-46267 This will be deleted in Moodle 3.8
*
* @throws coding_exception
*/
public function verify_https_required() {
debugging('verify_https_required() has been deprecated. It no longer needs to be called.', DEBUG_DEVELOPER);
}
// Initialisation methods =====================================================
// These set various things up in a default way.
/**
* This method is called when the page first moves out of the STATE_BEFORE_HEADER
* state. This is our last change to initialise things.
*/
protected function starting_output() {
global $CFG;
if (!during_initial_install()) {
$this->blocks->load_blocks();
if (empty($this->_block_actions_done)) {
$this->_block_actions_done = true;
if ($this->blocks->process_url_actions($this)) {
redirect($this->url->out(false));
}
}
$this->blocks->create_all_block_instances();
}
// If maintenance mode is on, change the page header.
if (!empty($CFG->maintenance_enabled)) {
$this->set_button('<a href="' . $CFG->wwwroot . '/' . $CFG->admin .
'/settings.php?section=maintenancemode">' . get_string('maintenancemode', 'admin') .
'</a> ' . $this->button);
$title = $this->title;
if ($title) {
$title .= ' - ';
}
$this->set_title($title . get_string('maintenancemode', 'admin'));
}
$this->initialise_standard_body_classes();
}
/**
* Method for use by Moodle core to set up the theme. Do not
* use this in your own code.
*
* Make sure the right theme for this page is loaded. Tell our
* blocks_manager about the theme block regions, and then, if
* we are $PAGE, set up the global $OUTPUT.
*
* @return void
*/
public function initialise_theme_and_output() {
global $OUTPUT, $PAGE, $SITE, $CFG;
if (!empty($this->_wherethemewasinitialised)) {
return;
}
if (!during_initial_install()) {
// Detect PAGE->context mess.
$this->magic_get_context();
}
if (!$this->_course && !during_initial_install()) {
$this->set_course($SITE);
}
if (is_null($this->_theme)) {
$themename = $this->resolve_theme();
$this->_theme = theme_config::load($themename);
}
$this->_theme->setup_blocks($this->pagelayout, $this->blocks);
if ($this === $PAGE) {
$target = null;
if ($this->pagelayout === 'maintenance') {
// If the page is using the maintenance layout then we're going to force target to maintenance.
// This leads to a special core renderer that is designed to block access to API's that are likely unavailable for this
// page layout.
$target = RENDERER_TARGET_MAINTENANCE;
}
$OUTPUT = $this->get_renderer('core', null, $target);
}
if (!during_initial_install()) {
$filtermanager = filter_manager::instance();
$filtermanager->setup_page_for_globally_available_filters($this);
}
$this->_wherethemewasinitialised = debug_backtrace();
}
/**
* Reset the theme and output for a new context. This only makes sense from
* external::validate_context(). Do not cheat.
*
* @return string the name of the theme that should be used on this page.
*/
public function reset_theme_and_output() {
global $COURSE, $SITE;
$COURSE = clone($SITE);
$this->_theme = null;
$this->_wherethemewasinitialised = null;
$this->_course = null;
$this->_cm = null;
$this->_module = null;
$this->_context = null;
}
/**
* Work out the theme this page should use.
*
* This depends on numerous $CFG settings, and the properties of this page.
*
* @return string the name of the theme that should be used on this page.
*/
protected function resolve_theme() {
global $CFG, $USER, $SESSION;
if (empty($CFG->themeorder)) {
$themeorder = array('course', 'category', 'session', 'user', 'cohort', 'site');
} else {
$themeorder = $CFG->themeorder;
// Just in case, make sure we always use the site theme if nothing else matched.
$themeorder[] = 'site';
}
$mnetpeertheme = '';
if (isloggedin() and isset($CFG->mnet_localhost_id) and $USER->mnethostid != $CFG->mnet_localhost_id) {
require_once($CFG->dirroot.'/mnet/peer.php');
$mnetpeer = new mnet_peer();
$mnetpeer->set_id($USER->mnethostid);
if ($mnetpeer->force_theme == 1 && $mnetpeer->theme != '') {
$mnetpeertheme = $mnetpeer->theme;
}
}
$devicetheme = core_useragent::get_device_type_theme($this->devicetypeinuse);
// The user is using another device than default, and we have a theme for that, we should use it.
$hascustomdevicetheme = core_useragent::DEVICETYPE_DEFAULT != $this->devicetypeinuse && !empty($devicetheme);
foreach ($themeorder as $themetype) {
switch ($themetype) {
case 'course':
if (!empty($CFG->allowcoursethemes) && !empty($this->_course->theme) && !$hascustomdevicetheme) {
return $this->_course->theme;
}
break;
case 'category':
if (!empty($CFG->allowcategorythemes) && !$hascustomdevicetheme) {
$categories = $this->categories;
foreach ($categories as $category) {
if (!empty($category->theme)) {
return $category->theme;
}
}
}
break;
case 'session':
if (!empty($SESSION->theme)) {
return $SESSION->theme;
}
break;
case 'user':
if (!empty($CFG->allowuserthemes) && !empty($USER->theme) && !$hascustomdevicetheme) {
if ($mnetpeertheme) {
return $mnetpeertheme;
} else {
return $USER->theme;
}
}
break;
case 'cohort':
if (!empty($CFG->allowcohortthemes) && !empty($USER->cohorttheme) && !$hascustomdevicetheme) {
return $USER->cohorttheme;
}
break;
case 'site':
if ($mnetpeertheme) {
return $mnetpeertheme;
}
// First try for the device the user is using.
if (!empty($devicetheme)) {
return $devicetheme;
}
// Next try for the default device (as a fallback).
$devicetheme = core_useragent::get_device_type_theme(core_useragent::DEVICETYPE_DEFAULT);
if (!empty($devicetheme)) {
return $devicetheme;
}
// The default device theme isn't set up - use the overall default theme.
return theme_config::DEFAULT_THEME;
}
}
// We should most certainly have resolved a theme by now. Something has gone wrong.
debugging('Error resolving the theme to use for this page.', DEBUG_DEVELOPER);
return theme_config::DEFAULT_THEME;
}
/**
* Sets ->pagetype from the script name. For example, if the script that was
* run is mod/quiz/view.php, ->pagetype will be set to 'mod-quiz-view'.
*
* @param string $script the path to the script that should be used to
* initialise ->pagetype. If not passed the $SCRIPT global will be used.
* If legacy code has set $CFG->pagepath that will be used instead, and a
* developer warning issued.
*/
protected function initialise_default_pagetype($script = null) {
global $CFG, $SCRIPT;
if (isset($CFG->pagepath)) {
debugging('Some code appears to have set $CFG->pagepath. That was a horrible deprecated thing. ' .
'Don\'t do it! Try calling $PAGE->set_pagetype() instead.');
$script = $CFG->pagepath;
unset($CFG->pagepath);
}
if (is_null($script)) {
$script = ltrim($SCRIPT, '/');
$len = strlen($CFG->admin);
if (substr($script, 0, $len) == $CFG->admin) {
$script = 'admin' . substr($script, $len);
}
}
$path = str_replace('.php', '', $script);
if (substr($path, -1) == '/') {
$path .= 'index';
}
if (empty($path) || $path == 'index') {
$this->_pagetype = 'site-index';
} else {
$this->_pagetype = str_replace('/', '-', $path);
}
}
/**
* Initialises the CSS classes that will be added to body tag of the page.
*
* The function is responsible for adding all of the critical CSS classes
* that describe the current page, and its state.
* This includes classes that describe the following for example:
* - Current language
* - Language direction
* - YUI CSS initialisation
* - Pagelayout
* These are commonly used in CSS to target specific types of pages.
*/
protected function initialise_standard_body_classes() {
global $CFG, $USER;
$pagetype = $this->pagetype;
if ($pagetype == 'site-index') {
$this->_legacyclass = 'course';
} else if (substr($pagetype, 0, 6) == 'admin-') {
$this->_legacyclass = 'admin';
}
$this->add_body_class($this->_legacyclass);
$pathbits = explode('-', trim($pagetype));
for ($i = 1; $i < count($pathbits); $i++) {
$this->add_body_class('path-' . join('-', array_slice($pathbits, 0, $i)));
}
$this->add_body_classes(core_useragent::get_browser_version_classes());
$this->add_body_class('dir-' . get_string('thisdirection', 'langconfig'));
$this->add_body_class('lang-' . current_language());
$this->add_body_class('yui-skin-sam'); // Make YUI happy, if it is used.
$this->add_body_class('yui3-skin-sam'); // Make YUI3 happy, if it is used.
$this->add_body_class($this->url_to_class_name($CFG->wwwroot));
// Extra class describing current page layout.
$this->add_body_class('pagelayout-' . $this->_pagelayout);
if (!during_initial_install()) {
$this->add_body_class('course-' . $this->_course->id);
$this->add_body_class('context-' . $this->_context->id);
}
if (!empty($this->_cm)) {
$this->add_body_class('cmid-' . $this->_cm->id);
}
if (!empty($CFG->allowcategorythemes)) {
$this->ensure_category_loaded();
foreach ($this->_categories as $catid => $notused) {
$this->add_body_class('category-' . $catid);
}
} else {
$catid = 0;
if (is_array($this->_categories)) {
$catids = array_keys($this->_categories);
$catid = reset($catids);
} else if (!empty($this->_course->category)) {
$catid = $this->_course->category;
}
if ($catid) {
$this->add_body_class('category-' . $catid);
}
}
if (!isloggedin()) {
$this->add_body_class('notloggedin');
}
if ($this->user_is_editing()) {
$this->add_body_class('editing');
if (optional_param('bui_moveid', false, PARAM_INT)) {
$this->add_body_class('blocks-moving');
}
}
if (!empty($CFG->blocksdrag)) {
$this->add_body_class('drag');
}
if ($this->_devicetypeinuse != 'default') {
$this->add_body_class($this->_devicetypeinuse . 'theme');
}
// Add class for behat site to apply behat related fixes.
if (defined('BEHAT_SITE_RUNNING')) {
$this->add_body_class('behat-site');
}
}
/**
* Loads the activity record for the current CM object associated with this
* page.
*
* This will load {@link moodle_page::$_module} with a row from the related
* module table in the database.
* For instance if {@link moodle_page::$_cm} is a forum then a row from the
* forum table will be loaded.
*/
protected function load_activity_record() {
global $DB;
if (is_null($this->_cm)) {
return;
}
$this->_module = $DB->get_record($this->_cm->modname, array('id' => $this->_cm->instance));
}
/**
* This function ensures that the category of the current course has been
* loaded, and if not, the function loads it now.
*
* @return void
* @throws coding_exception
*/
protected function ensure_category_loaded() {
if (is_array($this->_categories)) {
return; // Already done.
}
if (is_null($this->_course)) {
throw new coding_exception('Attempt to get the course category for this page before the course was set.');
}
if ($this->_course->category == 0) {
$this->_categories = array();
} else {
$this->load_category($this->_course->category);
}
}
/**
* Loads the requested category into the pages categories array.
*
* @param int $categoryid
* @throws moodle_exception
*/
protected function load_category($categoryid) {
global $DB;
$category = $DB->get_record('course_categories', array('id' => $categoryid));
if (!$category) {
throw new moodle_exception('unknowncategory');
}
$this->_categories[$category->id] = $category;
$parentcategoryids = explode('/', trim($category->path, '/'));
array_pop($parentcategoryids);
foreach (array_reverse($parentcategoryids) as $catid) {
$this->_categories[$catid] = null;
}
}
/**
* Ensures that the category the current course is within, as well as all of
* its parent categories, have been loaded.
*
* @return void
*/
protected function ensure_categories_loaded() {
global $DB;
$this->ensure_category_loaded();
if (!is_null(end($this->_categories))) {
return; // Already done.
}
$idstoload = array_keys($this->_categories);
array_shift($idstoload);
$categories = $DB->get_records_list('course_categories', 'id', $idstoload);
foreach ($idstoload as $catid) {
$this->_categories[$catid] = $categories[$catid];
}
}
/**
* Ensure the theme has not been loaded yet. If it has an exception is thrown.
*
* @throws coding_exception
*/
protected function ensure_theme_not_set() {
// This is explicitly allowed for webservices though which may process many course contexts in a single request.
if (WS_SERVER) {
return;
}
if (!is_null($this->_theme)) {
throw new coding_exception('The theme has already been set up for this page ready for output. ' .
'Therefore, you can no longer change the theme, or anything that might affect what ' .
'the current theme is, for example, the course.',
'Stack trace when the theme was set up: ' . format_backtrace($this->_wherethemewasinitialised));
}
}
/**
* Converts the provided URL into a CSS class that be used within the page.
* This is primarily used to add the wwwroot to the body tag as a CSS class.
*
* @param string $url
* @return string
*/
protected function url_to_class_name($url) {
$bits = parse_url($url);
$class = str_replace('.', '-', $bits['host']);
if (!empty($bits['port'])) {
$class .= '--' . $bits['port'];
}
if (!empty($bits['path'])) {
$path = trim($bits['path'], '/');
if ($path) {
$class .= '--' . str_replace('/', '-', $path);
}
}
return $class;
}
/**
* Combines all of the required editing caps for the page and returns them
* as an array.
*
* @return array
*/
protected function all_editing_caps() {
$caps = $this->_othereditingcaps;
$caps[] = $this->_blockseditingcap;
return $caps;
}
/**
* Returns true if the page URL has beem set.
*
* @return bool
*/
public function has_set_url() {
return ($this->_url!==null);
}
/**
* Gets set when the block actions for the page have been processed.
*
* @param bool $setting
*/
public function set_block_actions_done($setting = true) {
$this->_block_actions_done = $setting;
}
/**
* Are popup notifications allowed on this page?
* Popup notifications may be disallowed in situations such as while upgrading or completing a quiz
*
* @return bool true if popup notifications may be displayed
*/
public function get_popup_notification_allowed() {
return $this->_popup_notification_allowed;
}
/**
* Allow or disallow popup notifications on this page. Popups are allowed by default.
*
* @param bool $allowed true if notifications are allowed. False if not allowed. They are allowed by default.
*/
public function set_popup_notification_allowed($allowed) {
$this->_popup_notification_allowed = $allowed;
}
/**
* Returns the block region having made any required theme manipulations.
*
* @since Moodle 2.5.1 2.6
* @param string $region
* @return string
*/
public function apply_theme_region_manipulations($region) {
if ($this->blockmanipulations && isset($this->blockmanipulations[$region])) {
$regionwas = $region;
$regionnow = $this->blockmanipulations[$region];
if ($this->blocks->is_known_region($regionwas) && $this->blocks->is_known_region($regionnow)) {
// Both the before and after regions are known so we can swap them over.
return $regionnow;
}
// We didn't know about both, we won't swap them over.
return $regionwas;
}
return $region;
}
/**
* Add a report node and a specific report to the navigation.
*
* @param int $userid The user ID that we are looking to add this report node to.
* @param array $nodeinfo Name and url of the final node that we are creating.
*/
public function add_report_nodes($userid, $nodeinfo) {
global $USER;
// Try to find the specific user node.
$newusernode = $this->navigation->find('user' . $userid, null);
$reportnode = null;
$navigationnodeerror =
'Could not find the navigation node requested. Please check that the node you are looking for exists.';
if ($userid != $USER->id) {
// Check that we have a valid node.
if (empty($newusernode)) {
// Throw an error if we ever reach here.
throw new coding_exception($navigationnodeerror);
}
// Add 'Reports' to the user node.
$reportnode = $newusernode->add(get_string('reports'));
} else {
// We are looking at our own profile.
$myprofilenode = $this->settingsnav->find('myprofile', null);
// Check that we do end up with a valid node.
if (empty($myprofilenode)) {
// Throw an error if we ever reach here.
throw new coding_exception($navigationnodeerror);
}
// Add 'Reports' to our node.
$reportnode = $myprofilenode->add(get_string('reports'));
}
// Finally add the report to the navigation tree.
$reportnode->add($nodeinfo['name'], $nodeinfo['url'], navigation_node::TYPE_COURSE);
}
}