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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/>.
/**
* Functions for generating the HTML that Moodle should output.
*
* Please see http://docs.moodle.org/en/Developement:How_Moodle_outputs_HTML
* for an overview.
*
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package core
* @category output
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->libdir.'/outputcomponents.php');
require_once($CFG->libdir.'/outputactions.php');
require_once($CFG->libdir.'/outputfactories.php');
require_once($CFG->libdir.'/outputrenderers.php');
require_once($CFG->libdir.'/outputrequirementslib.php');
/**
* Invalidate all server and client side caches.
*
* This method deletes the physical directory that is used to cache the theme
* files used for serving.
* Because it deletes the main theme cache directory all themes are reset by
* this function.
*/
function theme_reset_all_caches() {
global $CFG;
require_once("$CFG->libdir/filelib.php");
$next = time();
if (isset($CFG->themerev) and $next <= $CFG->themerev and $CFG->themerev - $next < 60*60) {
// This resolves problems when reset is requested repeatedly within 1s,
// the < 1h condition prevents accidental switching to future dates
// because we might not recover from it.
$next = $CFG->themerev+1;
}
set_config('themerev', $next); // time is unique even when you reset/switch database
fulldelete("$CFG->cachedir/theme");
}
/**
* Enable or disable theme designer mode.
*
* @param bool $state
*/
function theme_set_designer_mod($state) {
theme_reset_all_caches();
set_config('themedesignermode', (int)!empty($state));
}
/**
* Returns current theme revision number.
*
* @return int
*/
function theme_get_revision() {
global $CFG;
if (empty($CFG->themedesignermode)) {
if (empty($CFG->themerev)) {
return -1;
} else {
return $CFG->themerev;
}
} else {
return -1;
}
}
/**
* This class represents the configuration variables of a Moodle theme.
*
* All the variables with access: public below (with a few exceptions that are marked)
* are the properties you can set in your themes config.php file.
*
* There are also some methods and protected variables that are part of the inner
* workings of Moodle's themes system. If you are just editing a themes config.php
* file, you can just ignore those, and the following information for developers.
*
* Normally, to create an instance of this class, you should use the
* {@link theme_config::load()} factory method to load a themes config.php file.
* However, normally you don't need to bother, because moodle_page (that is, $PAGE)
* will create one for you, accessible as $PAGE->theme.
*
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.0
* @package core
* @category output
*/
class theme_config {
/**
* @var string Default theme, used when requested theme not found.
*/
const DEFAULT_THEME = 'standard';
/**
* @var array You can base your theme on other themes by linking to the other theme as
* parents. This lets you use the CSS and layouts from the other themes
* (see {@link theme_config::$layouts}).
* That makes it easy to create a new theme that is similar to another one
* but with a few changes. In this themes CSS you only need to override
* those rules you want to change.
*/
public $parents;
/**
* @var array The names of all the stylesheets from this theme that you would
* like included, in order. Give the names of the files without .css.
*/
public $sheets = array();
/**
* @var array The names of all the stylesheets from parents that should be excluded.
* true value may be used to specify all parents or all themes from one parent.
* If no value specified value from parent theme used.
*/
public $parents_exclude_sheets = null;
/**
* @var array List of plugin sheets to be excluded.
* If no value specified value from parent theme used.
*/
public $plugins_exclude_sheets = null;
/**
* @var array List of style sheets that are included in the text editor bodies.
* Sheets from parent themes are used automatically and can not be excluded.
*/
public $editor_sheets = array();
/**
* @var array The names of all the javascript files this theme that you would
* like included from head, in order. Give the names of the files without .js.
*/
public $javascripts = array();
/**
* @var array The names of all the javascript files this theme that you would
* like included from footer, in order. Give the names of the files without .js.
*/
public $javascripts_footer = array();
/**
* @var array The names of all the javascript files from parents that should
* be excluded. true value may be used to specify all parents or all themes
* from one parent.
* If no value specified value from parent theme used.
*/
public $parents_exclude_javascripts = null;
/**
* @var array Which file to use for each page layout.
*
* This is an array of arrays. The keys of the outer array are the different layouts.
* Pages in Moodle are using several different layouts like 'normal', 'course', 'home',
* 'popup', 'form', .... The most reliable way to get a complete list is to look at
* {@link http://cvs.moodle.org/moodle/theme/base/config.php?view=markup the base theme config.php file}.
* That file also has a good example of how to set this setting.
*
* For each layout, the value in the outer array is an array that describes
* how you want that type of page to look. For example
* <pre>
* $THEME->layouts = array(
* // Most pages - if we encounter an unknown or a missing page type, this one is used.
* 'standard' => array(
* 'theme' = 'mytheme',
* 'file' => 'normal.php',
* 'regions' => array('side-pre', 'side-post'),
* 'defaultregion' => 'side-post'
* ),
* // The site home page.
* 'home' => array(
* 'theme' = 'mytheme',
* 'file' => 'home.php',
* 'regions' => array('side-pre', 'side-post'),
* 'defaultregion' => 'side-post'
* ),
* // ...
* );
* </pre>
*
* 'theme' name of the theme where is the layout located
* 'file' is the layout file to use for this type of page.
* layout files are stored in layout subfolder
* 'regions' This lists the regions on the page where blocks may appear. For
* each region you list here, your layout file must include a call to
* <pre>
* echo $OUTPUT->blocks_for_region($regionname);
* </pre>
* or equivalent so that the blocks are actually visible.
*
* 'defaultregion' If the list of regions is non-empty, then you must pick
* one of the one of them as 'default'. This has two meanings. First, this is
* where new blocks are added. Second, if there are any blocks associated with
* the page, but in non-existent regions, they appear here. (Imaging, for example,
* that someone added blocks using a different theme that used different region
* names, and then switched to this theme.)
*/
public $layouts = array();
/**
* @var string Name of the renderer factory class to use. Must implement the
* {@link renderer_factory} interface.
*
* This is an advanced feature. Moodle output is generated by 'renderers',
* you can customise the HTML that is output by writing custom renderers,
* and then you need to specify 'renderer factory' so that Moodle can find
* your renderers.
*
* There are some renderer factories supplied with Moodle. Please follow these
* links to see what they do.
* <ul>
* <li>{@link standard_renderer_factory} - the default.</li>
* <li>{@link theme_overridden_renderer_factory} - use this if you want to write
* your own custom renderers in a lib.php file in this theme (or the parent theme).</li>
* </ul>
*/
public $rendererfactory = 'standard_renderer_factory';
/**
* @var string Function to do custom CSS post-processing.
*
* This is an advanced feature. If you want to do custom post-processing on the
* CSS before it is output (for example, to replace certain variable names
* with particular values) you can give the name of a function here.
*/
public $csspostprocess = null;
/**
* @var string Accessibility: Right arrow-like character is
* used in the breadcrumb trail, course navigation menu
* (previous/next activity), calendar, and search forum block.
* If the theme does not set characters, appropriate defaults
* are set automatically. Please DO NOT
* use &lt; &gt; &raquo; - these are confusing for blind users.
*/
public $rarrow = null;
/**
* @var string Accessibility: Right arrow-like character is
* used in the breadcrumb trail, course navigation menu
* (previous/next activity), calendar, and search forum block.
* If the theme does not set characters, appropriate defaults
* are set automatically. Please DO NOT
* use &lt; &gt; &raquo; - these are confusing for blind users.
*/
public $larrow = null;
/**
* @var bool Some themes may want to disable ajax course editing.
*/
public $enablecourseajax = true;
/**
* @var string Determines served document types
* - 'html5' the only officially supported doctype in Moodle
* - 'xhtml5' may be used in development for validation (not intended for production servers!)
* - 'xhtml' XHTML 1.0 Strict for legacy themes only
*/
public $doctype = 'html5';
//==Following properties are not configurable from theme config.php==
/**
* @var string The name of this theme. Set automatically when this theme is
* loaded. This can not be set in theme config.php
*/
public $name;
/**
* @var string The folder where this themes files are stored. This is set
* automatically. This can not be set in theme config.php
*/
public $dir;
/**
* @var stdClass Theme settings stored in config_plugins table.
* This can not be set in theme config.php
*/
public $setting = null;
/**
* @var bool If set to true and the theme enables the dock then blocks will be able
* to be moved to the special dock
*/
public $enable_dock = false;
/**
* @var bool If set to true then this theme will not be shown in the theme selector unless
* theme designer mode is turned on.
*/
public $hidefromselector = false;
/**
* @var renderer_factory Instance of the renderer_factory implementation
* we are using. Implementation detail.
*/
protected $rf = null;
/**
* @var array List of parent config objects.
**/
protected $parent_configs = array();
/**
* @var bool If set to true then the theme is safe to run through the optimiser (if it is enabled)
* If set to false then we know either the theme has already been optimised and the CSS optimiser is not needed
* or the theme is not compatible with the CSS optimiser. In both cases even if enabled the CSS optimiser will not
* be used with this theme if set to false.
*/
public $supportscssoptimisation = true;
/**
* Used to determine whether we can serve SVG images or not.
* @var bool
*/
private $usesvg = null;
/**
* Load the config.php file for a particular theme, and return an instance
* of this class. (That is, this is a factory method.)
*
* @param string $themename the name of the theme.
* @return theme_config an instance of this class.
*/
public static function load($themename) {
global $CFG;
// load theme settings from db
try {
$settings = get_config('theme_'.$themename);
} catch (dml_exception $e) {
// most probably moodle tables not created yet
$settings = new stdClass();
}
if ($config = theme_config::find_theme_config($themename, $settings)) {
return new theme_config($config);
} else if ($themename == theme_config::DEFAULT_THEME) {
throw new coding_exception('Default theme '.theme_config::DEFAULT_THEME.' not available or broken!');
} else {
// bad luck, the requested theme has some problems - admin see details in theme config
return new theme_config(theme_config::find_theme_config(theme_config::DEFAULT_THEME, $settings));
}
}
/**
* Theme diagnostic code. It is very problematic to send debug output
* to the actual CSS file, instead this functions is supposed to
* diagnose given theme and highlights all potential problems.
* This information should be available from the theme selection page
* or some other debug page for theme designers.
*
* @param string $themename
* @return array description of problems
*/
public static function diagnose($themename) {
//TODO: MDL-21108
return array();
}
/**
* Private constructor, can be called only from the factory method.
* @param stdClass $config
*/
private function __construct($config) {
global $CFG; //needed for included lib.php files
$this->settings = $config->settings;
$this->name = $config->name;
$this->dir = $config->dir;
if ($this->name != 'base') {
$baseconfig = theme_config::find_theme_config('base', $this->settings);
} else {
$baseconfig = $config;
}
$configurable = array('parents', 'sheets', 'parents_exclude_sheets', 'plugins_exclude_sheets', 'javascripts', 'javascripts_footer',
'parents_exclude_javascripts', 'layouts', 'enable_dock', 'enablecourseajax', 'supportscssoptimisation',
'rendererfactory', 'csspostprocess', 'editor_sheets', 'rarrow', 'larrow', 'hidefromselector', 'doctype');
foreach ($config as $key=>$value) {
if (in_array($key, $configurable)) {
$this->$key = $value;
}
}
// verify all parents and load configs and renderers
foreach ($this->parents as $parent) {
if ($parent == 'base') {
$parent_config = $baseconfig;
} else if (!$parent_config = theme_config::find_theme_config($parent, $this->settings)) {
// this is not good - better exclude faulty parents
continue;
}
$libfile = $parent_config->dir.'/lib.php';
if (is_readable($libfile)) {
// theme may store various function here
include_once($libfile);
}
$renderersfile = $parent_config->dir.'/renderers.php';
if (is_readable($renderersfile)) {
// may contain core and plugin renderers and renderer factory
include_once($renderersfile);
}
$this->parent_configs[$parent] = $parent_config;
$rendererfile = $parent_config->dir.'/renderers.php';
if (is_readable($rendererfile)) {
// may contain core and plugin renderers and renderer factory
include_once($rendererfile);
}
}
$libfile = $this->dir.'/lib.php';
if (is_readable($libfile)) {
// theme may store various function here
include_once($libfile);
}
$rendererfile = $this->dir.'/renderers.php';
if (is_readable($rendererfile)) {
// may contain core and plugin renderers and renderer factory
include_once($rendererfile);
} else {
// check if renderers.php file is missnamed renderer.php
if (is_readable($this->dir.'/renderer.php')) {
debugging('Developer hint: '.$this->dir.'/renderer.php should be renamed to ' . $this->dir."/renderers.php.
See: http://docs.moodle.org/dev/Output_renderers#Theme_renderers.", DEBUG_DEVELOPER);
}
}
// cascade all layouts properly
foreach ($baseconfig->layouts as $layout=>$value) {
if (!isset($this->layouts[$layout])) {
foreach ($this->parent_configs as $parent_config) {
if (isset($parent_config->layouts[$layout])) {
$this->layouts[$layout] = $parent_config->layouts[$layout];
continue 2;
}
}
$this->layouts[$layout] = $value;
}
}
//fix arrows if needed
$this->check_theme_arrows();
}
/**
* Checks if arrows $THEME->rarrow, $THEME->larrow have been set (theme/-/config.php).
* If not it applies sensible defaults.
*
* Accessibility: right and left arrow Unicode characters for breadcrumb, calendar,
* search forum block, etc. Important: these are 'silent' in a screen-reader
* (unlike &gt; &raquo;), and must be accompanied by text.
*/
private function check_theme_arrows() {
if (!isset($this->rarrow) and !isset($this->larrow)) {
// Default, looks good in Win XP/IE 6, Win/Firefox 1.5, Win/Netscape 8...
// Also OK in Win 9x/2K/IE 5.x
$this->rarrow = '&#x25BA;';
$this->larrow = '&#x25C4;';
if (empty($_SERVER['HTTP_USER_AGENT'])) {
$uagent = '';
} else {
$uagent = $_SERVER['HTTP_USER_AGENT'];
}
if (false !== strpos($uagent, 'Opera')
|| false !== strpos($uagent, 'Mac')) {
// Looks good in Win XP/Mac/Opera 8/9, Mac/Firefox 2, Camino, Safari.
// Not broken in Mac/IE 5, Mac/Netscape 7 (?).
$this->rarrow = '&#x25B6;';
$this->larrow = '&#x25C0;';
}
elseif (false !== strpos($uagent, 'Konqueror')) {
$this->rarrow = '&rarr;';
$this->larrow = '&larr;';
}
elseif (isset($_SERVER['HTTP_ACCEPT_CHARSET'])
&& false === stripos($_SERVER['HTTP_ACCEPT_CHARSET'], 'utf-8')) {
// (Win/IE 5 doesn't set ACCEPT_CHARSET, but handles Unicode.)
// To be safe, non-Unicode browsers!
$this->rarrow = '&gt;';
$this->larrow = '&lt;';
}
// RTL support - in RTL languages, swap r and l arrows
if (right_to_left()) {
$t = $this->rarrow;
$this->rarrow = $this->larrow;
$this->larrow = $t;
}
}
}
/**
* Returns output renderer prefixes, these are used when looking
* for the overridden renderers in themes.
*
* @return array
*/
public function renderer_prefixes() {
global $CFG; // just in case the included files need it
$prefixes = array('theme_'.$this->name);
foreach ($this->parent_configs as $parent) {
$prefixes[] = 'theme_'.$parent->name;
}
return $prefixes;
}
/**
* Returns the stylesheet URL of this editor content
*
* @param bool $encoded false means use & and true use &amp; in URLs
* @return string
*/
public function editor_css_url($encoded=true) {
global $CFG;
$rev = theme_get_revision();
if ($rev > -1) {
if (!empty($CFG->slasharguments)) {
$url = new moodle_url("$CFG->httpswwwroot/theme/styles.php");
$url->set_slashargument('/'.$this->name.'/'.$rev.'/editor', 'noparam', true);
return $url;
} else {
$params = array('theme'=>$this->name,'rev'=>$rev, 'type'=>'editor');
return new moodle_url($CFG->httpswwwroot.'/theme/styles.php', $params);
}
} else {
$params = array('theme'=>$this->name, 'type'=>'editor');
return new moodle_url($CFG->httpswwwroot.'/theme/styles_debug.php', $params);
}
}
/**
* Returns the content of the CSS to be used in editor content
*
* @return string
*/
public function editor_css_files() {
global $CFG;
$files = array();
// first editor plugins
$plugins = get_plugin_list('editor');
foreach ($plugins as $plugin=>$fulldir) {
$sheetfile = "$fulldir/editor_styles.css";
if (is_readable($sheetfile)) {
$files['plugin_'.$plugin] = $sheetfile;
}
}
// then parent themes
foreach (array_reverse($this->parent_configs) as $parent_config) { // base first, the immediate parent last
if (empty($parent_config->editor_sheets)) {
continue;
}
foreach ($parent_config->editor_sheets as $sheet) {
$sheetfile = "$parent_config->dir/style/$sheet.css";
if (is_readable($sheetfile)) {
$files['parent_'.$parent_config->name.'_'.$sheet] = $sheetfile;
}
}
}
// finally this theme
if (!empty($this->editor_sheets)) {
foreach ($this->editor_sheets as $sheet) {
$sheetfile = "$this->dir/style/$sheet.css";
if (is_readable($sheetfile)) {
$files['theme_'.$sheet] = $sheetfile;
}
}
}
return $files;
}
/**
* Get the stylesheet URL of this theme
*
* @param moodle_page $page Not used... deprecated?
* @return array of moodle_url
*/
public function css_urls(moodle_page $page) {
global $CFG;
$rev = theme_get_revision();
$urls = array();
if ($rev > -1) {
if (check_browser_version('MSIE', 5)) {
// We need to split the CSS files for IE
$urls[] = new moodle_url($CFG->httpswwwroot.'/theme/styles.php', array('theme'=>$this->name,'rev'=>$rev, 'type'=>'plugins'));
$urls[] = new moodle_url($CFG->httpswwwroot.'/theme/styles.php', array('theme'=>$this->name,'rev'=>$rev, 'type'=>'parents'));
$urls[] = new moodle_url($CFG->httpswwwroot.'/theme/styles.php', array('theme'=>$this->name,'rev'=>$rev, 'type'=>'theme'));
} else {
if (!empty($CFG->slasharguments)) {
$url = new moodle_url("$CFG->httpswwwroot/theme/styles.php");
$url->set_slashargument('/'.$this->name.'/'.$rev.'/all', 'noparam', true);
$urls[] = $url;
} else {
$urls[] = new moodle_url($CFG->httpswwwroot.'/theme/styles.php', array('theme'=>$this->name,'rev'=>$rev, 'type'=>'all'));
}
}
} else {
// find out the current CSS and cache it now for 5 seconds
// the point is to construct the CSS only once and pass it through the
// dataroot to the script that actually serves the sheets
if (!defined('THEME_DESIGNER_CACHE_LIFETIME')) {
define('THEME_DESIGNER_CACHE_LIFETIME', 4); // this can be also set in config.php
}
$candidatedir = "$CFG->cachedir/theme/$this->name";
$candidatesheet = "$candidatedir/designer.ser";
$rebuild = true;
if (file_exists($candidatesheet) and filemtime($candidatesheet) > time() - THEME_DESIGNER_CACHE_LIFETIME) {
if ($css = file_get_contents($candidatesheet)) {
$css = unserialize($css);
if (is_array($css)) {
$rebuild = false;
}
}
}
if ($rebuild) {
// Prepare the CSS optimiser if it is to be used,
// please note that it may be very slow and is therefore strongly discouraged in theme designer mode.
$optimiser = null;
if (!empty($CFG->enablecssoptimiser) && $this->supportscssoptimisation) {
require_once($CFG->dirroot.'/lib/csslib.php');
$optimiser = new css_optimiser;
}
$css = $this->css_content($optimiser);
// We do not want any errors here because this may fail easily because of the concurrent access.
$prevabort = ignore_user_abort(true);
check_dir_exists($candidatedir);
$tempfile = tempnam($candidatedir, 'tmpdesigner');
file_put_contents($tempfile, serialize($css));
$reporting = error_reporting(0);
chmod($tempfile, $CFG->filepermissions);
unlink($candidatesheet); // Do not rely on rename() deleting original, they may decide to change it at any time as usually.
rename($tempfile, $candidatesheet);
error_reporting($reporting);
ignore_user_abort($prevabort);
}
$baseurl = $CFG->httpswwwroot.'/theme/styles_debug.php';
if (check_browser_version('MSIE', 5)) {
// lalala, IE does not allow more than 31 linked CSS files from main document
$urls[] = new moodle_url($baseurl, array('theme'=>$this->name, 'type'=>'ie', 'subtype'=>'plugins'));
foreach ($css['parents'] as $parent=>$sheets) {
// We need to serve parents individually otherwise we may easily exceed the style limit IE imposes (4096)
$urls[] = new moodle_url($baseurl, array('theme'=>$this->name,'type'=>'ie', 'subtype'=>'parents', 'sheet'=>$parent));
}
$urls[] = new moodle_url($baseurl, array('theme'=>$this->name, 'type'=>'ie', 'subtype'=>'theme'));
} else {
foreach ($css['plugins'] as $plugin=>$unused) {
$urls[] = new moodle_url($baseurl, array('theme'=>$this->name,'type'=>'plugin', 'subtype'=>$plugin));
}
foreach ($css['parents'] as $parent=>$sheets) {
foreach ($sheets as $sheet=>$unused2) {
$urls[] = new moodle_url($baseurl, array('theme'=>$this->name,'type'=>'parent', 'subtype'=>$parent, 'sheet'=>$sheet));
}
}
foreach ($css['theme'] as $sheet=>$unused) {
$urls[] = new moodle_url($baseurl, array('sheet'=>$sheet, 'theme'=>$this->name, 'type'=>'theme')); // sheet first in order to make long urls easier to read
}
}
}
return $urls;
}
/**
* Returns an array of organised CSS files required for this output
*
* @return array
*/
public function css_files() {
$cssfiles = array('plugins'=>array(), 'parents'=>array(), 'theme'=>array());
// get all plugin sheets
$excludes = $this->resolve_excludes('plugins_exclude_sheets');
if ($excludes !== true) {
foreach (get_plugin_types() as $type=>$unused) {
if ($type === 'theme' || (!empty($excludes[$type]) and $excludes[$type] === true)) {
continue;
}
$plugins = get_plugin_list($type);
foreach ($plugins as $plugin=>$fulldir) {
if (!empty($excludes[$type]) and is_array($excludes[$type])
and in_array($plugin, $excludes[$type])) {
continue;
}
$plugincontent = '';
$sheetfile = "$fulldir/styles.css";
if (is_readable($sheetfile)) {
$cssfiles['plugins'][$type.'_'.$plugin] = $sheetfile;
}
$sheetthemefile = "$fulldir/styles_{$this->name}.css";
if (is_readable($sheetthemefile)) {
$cssfiles['plugins'][$type.'_'.$plugin.'_'.$this->name] = $sheetthemefile;
}
}
}
}
// find out wanted parent sheets
$excludes = $this->resolve_excludes('parents_exclude_sheets');
if ($excludes !== true) {
foreach (array_reverse($this->parent_configs) as $parent_config) { // base first, the immediate parent last
$parent = $parent_config->name;
if (empty($parent_config->sheets) || (!empty($excludes[$parent]) and $excludes[$parent] === true)) {
continue;
}
foreach ($parent_config->sheets as $sheet) {
if (!empty($excludes[$parent]) and is_array($excludes[$parent])
and in_array($sheet, $excludes[$parent])) {
continue;
}
$sheetfile = "$parent_config->dir/style/$sheet.css";
if (is_readable($sheetfile)) {
$cssfiles['parents'][$parent][$sheet] = $sheetfile;
}
}
}
}
// current theme sheets
if (is_array($this->sheets)) {
foreach ($this->sheets as $sheet) {
$sheetfile = "$this->dir/style/$sheet.css";
if (is_readable($sheetfile)) {
$cssfiles['theme'][$sheet] = $sheetfile;
}
}
}
return $cssfiles;
}
/**
* Returns the content of the one huge CSS merged from all style sheets.
*
* @param css_optimiser|null $optimiser A CSS optimiser to use during on the content. Null = don't optimise
* @return string
*/
public function css_content(css_optimiser $optimiser = null) {
$files = array_merge($this->css_files(), array('editor'=>$this->editor_css_files()));
$css = $this->css_files_get_contents($files, array(), $optimiser);
return $css;
}
/**
* Given an array of file paths or a single file path loads the contents of
* the CSS file, processes it then returns it in the same structure it was given.
*
* Can be used recursively on the results of {@link css_files}
*
* @param array|string $file An array of file paths or a single file path
* @param array $keys An array of previous array keys [recursive addition]
* @param css_optimiser|null $optimiser A CSS optimiser to use during on the content. Null = don't optimise
* @return The converted array or the contents of the single file ($file type)
*/
protected function css_files_get_contents($file, array $keys, css_optimiser $optimiser = null) {
global $CFG;
if (is_array($file)) {
foreach ($file as $key=>$f) {
$file[$key] = $this->css_files_get_contents($f, array_merge($keys, array($key)), $optimiser);
}
return $file;
} else {
$contents = file_get_contents($file);
$contents = $this->post_process($contents);
$comment = '/** Path: '.implode(' ', $keys).' **/'."\n";
$stats = '';
if (!is_null($optimiser)) {
$contents = $optimiser->process($contents);
if (!empty($CFG->cssoptimiserstats)) {
$stats = $optimiser->output_stats_css();
}
}
return $comment.$stats.$contents;
}
}
/**
* Generate a URL to the file that serves theme JavaScript files.
*
* @param bool $inhead true means head url, false means footer
* @return moodle_url
*/
public function javascript_url($inhead) {
global $CFG;
$rev = theme_get_revision();
$params = array('theme'=>$this->name,'rev'=>$rev);
$params['type'] = $inhead ? 'head' : 'footer';
if (!empty($CFG->slasharguments) and $rev > 0) {
$url = new moodle_url("$CFG->httpswwwroot/theme/javascript.php");
$url->set_slashargument('/'.$this->name.'/'.$rev.'/'.$params['type'], 'noparam', true);
return $url;
} else {
return new moodle_url($CFG->httpswwwroot.'/theme/javascript.php', $params);
}
}
/**
* Get the URL's for the JavaScript files used by this theme.
* They won't be served directly, instead they'll be mediated through
* theme/javascript.php.
*
* @param string $type Either javascripts_footer, or javascripts
* @return array
*/
public function javascript_files($type) {
if ($type === 'footer') {
$type = 'javascripts_footer';
} else {
$type = 'javascripts';
}
$js = array();
// find out wanted parent javascripts
$excludes = $this->resolve_excludes('parents_exclude_javascripts');
if ($excludes !== true) {
foreach (array_reverse($this->parent_configs) as $parent_config) { // base first, the immediate parent last
$parent = $parent_config->name;
if (empty($parent_config->$type)) {
continue;
}
if (!empty($excludes[$parent]) and $excludes[$parent] === true) {
continue;
}
foreach ($parent_config->$type as $javascript) {
if (!empty($excludes[$parent]) and is_array($excludes[$parent])
and in_array($javascript, $excludes[$parent])) {
continue;
}
$javascriptfile = "$parent_config->dir/javascript/$javascript.js";
if (is_readable($javascriptfile)) {
$js[] = $javascriptfile;
}
}
}
}
// current theme javascripts
if (is_array($this->$type)) {
foreach ($this->$type as $javascript) {
$javascriptfile = "$this->dir/javascript/$javascript.js";
if (is_readable($javascriptfile)) {
$js[] = $javascriptfile;
}
}
}
return $js;
}
/**
* Resolves an exclude setting to the themes setting is applicable or the
* setting of its closest parent.
*
* @param string $variable The name of the setting the exclude setting to resolve
* @param string $default
* @return mixed
*/
protected function resolve_excludes($variable, $default = null) {
$setting = $default;
if (is_array($this->{$variable}) or $this->{$variable} === true) {
$setting = $this->{$variable};
} else {
foreach ($this->parent_configs as $parent_config) { // the immediate parent first, base last
if (!isset($parent_config->{$variable})) {
continue;
}
if (is_array($parent_config->{$variable}) or $parent_config->{$variable} === true) {
$setting = $parent_config->{$variable};
break;
}
}
}
return $setting;
}
/**
* Returns the content of the one huge javascript file merged from all theme javascript files.
*
* @param bool $type
* @return string
*/
public function javascript_content($type) {
$jsfiles = $this->javascript_files($type);
$js = '';
foreach ($jsfiles as $jsfile) {
$js .= file_get_contents($jsfile)."\n";
}
return $js;
}
/**
* Post processes CSS.
*
* This method post processes all of the CSS before it is served for this theme.
* This is done so that things such as image URL's can be swapped in and to
* run any specific CSS post process method the theme has requested.
* This allows themes to use CSS settings.
*
* @param string $css The CSS to process.
* @return string The processed CSS.
*/
public function post_process($css) {
// now resolve all image locations
if (preg_match_all('/\[\[pix:([a-z_]+\|)?([^\]]+)\]\]/', $css, $matches, PREG_SET_ORDER)) {
$replaced = array();
foreach ($matches as $match) {
if (isset($replaced[$match[0]])) {
continue;
}
$replaced[$match[0]] = true;
$imagename = $match[2];
$component = rtrim($match[1], '|');
$imageurl = $this->pix_url($imagename, $component)->out(false);
// we do not need full url because the image.php is always in the same dir
$imageurl = preg_replace('|^http.?://[^/]+|', '', $imageurl);
$css = str_replace($match[0], $imageurl, $css);
}
}
// now resolve all theme settings or do any other postprocessing
$csspostprocess = $this->csspostprocess;
if (function_exists($csspostprocess)) {
$css = $csspostprocess($css, $this);
}
return $css;
}
/**
* Return the URL for an image
*
* @param string $imagename the name of the icon.
* @param string $component specification of one plugin like in get_string()
* @return moodle_url
*/
public function pix_url($imagename, $component) {
global $CFG;
$params = array('theme'=>$this->name);
$svg = $this->use_svg_icons();
if (empty($component) or $component === 'moodle' or $component === 'core') {
$params['component'] = 'core';
} else {
$params['component'] = $component;
}
$rev = theme_get_revision();
if ($rev != -1) {
$params['rev'] = $rev;
}
$params['image'] = $imagename;
$url = new moodle_url("$CFG->httpswwwroot/theme/image.php");
if (!empty($CFG->slasharguments) and $rev > 0) {
$path = '/'.$params['theme'].'/'.$params['component'].'/'.$params['rev'].'/'.$params['image'];
if (!$svg) {
// We add a simple /_s to the start of the path.
// The underscore is used to ensure that it isn't a valid theme name.
$path = '/_s'.$path;
}
$url->set_slashargument($path, 'noparam', true);
} else {
if (!$svg) {
// We add an SVG param so that we know not to serve SVG images.
// We do this because all modern browsers support SVG and this param will one day be removed.
$params['svg'] = '0';
}
$url->params($params);
}
return $url;
}
/**
* Resolves the real image location.
*
* $svg was introduced as an arg in 2.4. It is important because not all supported browsers support the use of SVG
* and we need a way in which to turn it off.
* By default SVG won't be used unless asked for. This is done for two reasons:
* 1. It ensures that we don't serve svg images unless we really want to. The admin has selected to force them, of the users
* browser supports SVG.
* 2. We only serve SVG images from locations we trust. This must NOT include any areas where the image may have been uploaded
* by the user due to security concerns.
*
* @param string $image name of image, may contain relative path
* @param string $component
* @param bool $svg If set to true SVG images will also be looked for.
* @return string full file path
*/
public function resolve_image_location($image, $component, $svg = false) {
global $CFG;
if (!is_bool($svg)) {
// If $svg isn't a bool then we need to decide for ourselves.
$svg = $this->use_svg_icons();
}
if ($component === 'moodle' or $component === 'core' or empty($component)) {
if ($imagefile = $this->image_exists("$this->dir/pix_core/$image", $svg)) {
return $imagefile;
}
foreach (array_reverse($this->parent_configs) as $parent_config) { // base first, the immediate parent last
if ($imagefile = $this->image_exists("$parent_config->dir/pix_core/$image", $svg)) {
return $imagefile;
}
}
if ($imagefile = $this->image_exists("$CFG->dataroot/pix/$image", $svg)) {
return $imagefile;
}
if ($imagefile = $this->image_exists("$CFG->dirroot/pix/$image", $svg)) {
return $imagefile;
}
return null;
} else if ($component === 'theme') { //exception
if ($image === 'favicon') {
return "$this->dir/pix/favicon.ico";
}
if ($imagefile = $this->image_exists("$this->dir/pix/$image", $svg)) {
return $imagefile;
}
foreach (array_reverse($this->parent_configs) as $parent_config) { // base first, the immediate parent last
if ($imagefile = $this->image_exists("$parent_config->dir/pix/$image", $svg)) {
return $imagefile;
}
}
return null;
} else {
if (strpos($component, '_') === false) {
$component = 'mod_'.$component;
}
list($type, $plugin) = explode('_', $component, 2);
if ($imagefile = $this->image_exists("$this->dir/pix_plugins/$type/$plugin/$image", $svg)) {
return $imagefile;
}
foreach (array_reverse($this->parent_configs) as $parent_config) { // base first, the immediate parent last
if ($imagefile = $this->image_exists("$parent_config->dir/pix_plugins/$type/$plugin/$image", $svg)) {
return $imagefile;
}
}
if ($imagefile = $this->image_exists("$CFG->dataroot/pix_plugins/$type/$plugin/$image", $svg)) {
return $imagefile;
}
$dir = get_plugin_directory($type, $plugin);
if ($imagefile = $this->image_exists("$dir/pix/$image", $svg)) {
return $imagefile;
}
return null;
}
}
/**
* Return true if we should look for SVG images as well.
*
* @staticvar bool $svg
* @return bool
*/
public function use_svg_icons() {
global $CFG;
if ($this->usesvg === null) {
if (!isset($CFG->svgicons) || !is_bool($CFG->svgicons)) {
// IE 5 - 8 don't support SVG at all.
if (empty($_SERVER['HTTP_USER_AGENT'])) {
// Can't be sure, just say no.
$this->usesvg = false;
} else if (preg_match('#MSIE +[5-8]\.#', $_SERVER['HTTP_USER_AGENT'])) {
// IE < 9 doesn't support SVG. Say no.
$this->usesvg = false;
} else if (preg_match('#Android +[0-2]\.#', $_SERVER['HTTP_USER_AGENT'])) {
// Android < 3 doesn't support SVG. Say no.
$this->usesvg = false;
} else {
// Presumed fine.
$this->usesvg = true;
}
} else {
// Force them on/off depending upon the setting.
$this->usesvg = $CFG->svgicons;
}
}
return $this->usesvg;
}
/**
* Checks if file with any image extension exists.
*
* The order to these images was adjusted prior to the release of 2.4
* At that point the were the following image counts in Moodle core:
*
* - png = 667 in pix dirs (1499 total)
* - gif = 385 in pix dirs (606 total)
* - jpg = 62 in pix dirs (74 total)
* - jpeg = 0 in pix dirs (1 total)
*
* There is work in progress to move towards SVG presently hence that has been prioritiesed.
*
* @param string $filepath
* @param bool $svg If set to true SVG images will also be looked for.
* @return string image name with extension
*/
private static function image_exists($filepath, $svg = false) {
if ($svg && file_exists("$filepath.svg")) {
return "$filepath.svg";
} else if (file_exists("$filepath.png")) {
return "$filepath.png";
} else if (file_exists("$filepath.gif")) {
return "$filepath.gif";
} else if (file_exists("$filepath.jpg")) {
return "$filepath.jpg";
} else if (file_exists("$filepath.jpeg")) {
return "$filepath.jpeg";
} else {
return false;
}
}
/**
* Loads the theme config from config.php file.
*
* @param string $themename
* @param stdClass $settings from config_plugins table
* @return stdClass The theme configuration
*/
private static function find_theme_config($themename, $settings) {
// We have to use the variable name $THEME (upper case) because that
// is what is used in theme config.php files.
if (!$dir = theme_config::find_theme_location($themename)) {
return null;
}
$THEME = new stdClass();
$THEME->name = $themename;
$THEME->dir = $dir;
$THEME->settings = $settings;
global $CFG; // just in case somebody tries to use $CFG in theme config
include("$THEME->dir/config.php");
// verify the theme configuration is OK
if (!is_array($THEME->parents)) {
// parents option is mandatory now
return null;
}
return $THEME;
}
/**
* Finds the theme location and verifies the theme has all needed files
* and is not obsoleted.
*
* @param string $themename
* @return string full dir path or null if not found
*/
private static function find_theme_location($themename) {
global $CFG;
if (file_exists("$CFG->dirroot/theme/$themename/config.php")) {
$dir = "$CFG->dirroot/theme/$themename";
} else if (!empty($CFG->themedir) and file_exists("$CFG->themedir/$themename/config.php")) {
$dir = "$CFG->themedir/$themename";
} else {
return null;
}
if (file_exists("$dir/styles.php")) {
//legacy theme - needs to be upgraded - upgrade info is displayed on the admin settings page
return null;
}
return $dir;
}
/**
* Get the renderer for a part of Moodle for this theme.
*
* @param moodle_page $page the page we are rendering
* @param string $component the name of part of moodle. E.g. 'core', 'quiz', '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 the requested renderer.
*/
public function get_renderer(moodle_page $page, $component, $subtype = null, $target = null) {
if (is_null($this->rf)) {
$classname = $this->rendererfactory;
$this->rf = new $classname($this);
}
return $this->rf->get_renderer($page, $component, $subtype, $target);
}
/**
* Get the information from {@link $layouts} for this type of page.
*
* @param string $pagelayout the the page layout name.
* @return array the appropriate part of {@link $layouts}.
*/
protected function layout_info_for_page($pagelayout) {
if (array_key_exists($pagelayout, $this->layouts)) {
return $this->layouts[$pagelayout];
} else {
debugging('Invalid page layout specified: ' . $pagelayout);
return $this->layouts['standard'];
}
}
/**
* Given the settings of this theme, and the page pagelayout, return the
* full path of the page layout file to use.
*
* Used by {@link core_renderer::header()}.
*
* @param string $pagelayout the the page layout name.
* @return string Full path to the lyout file to use
*/
public function layout_file($pagelayout) {
global $CFG;
$layoutinfo = $this->layout_info_for_page($pagelayout);
$layoutfile = $layoutinfo['file'];
if (array_key_exists('theme', $layoutinfo)) {
$themes = array($layoutinfo['theme']);
} else {
$themes = array_merge(array($this->name),$this->parents);
}
foreach ($themes as $theme) {
if ($dir = $this->find_theme_location($theme)) {
$path = "$dir/layout/$layoutfile";
// Check the template exists, return general base theme template if not.
if (is_readable($path)) {
return $path;
}
}
}
debugging('Can not find layout file for: ' . $pagelayout);
// fallback to standard normal layout
return "$CFG->dirroot/theme/base/layout/general.php";
}
/**
* Returns auxiliary page layout options specified in layout configuration array.
*
* @param string $pagelayout
* @return array
*/
public function pagelayout_options($pagelayout) {
$info = $this->layout_info_for_page($pagelayout);
if (!empty($info['options'])) {
return $info['options'];
}
return array();
}
/**
* Inform a block_manager about the block regions this theme wants on this
* page layout.
*
* @param string $pagelayout the general type of the page.
* @param block_manager $blockmanager the block_manger to set up.
*/
public function setup_blocks($pagelayout, $blockmanager) {
$layoutinfo = $this->layout_info_for_page($pagelayout);
if (!empty($layoutinfo['regions'])) {
$blockmanager->add_regions($layoutinfo['regions']);
$blockmanager->set_default_region($layoutinfo['defaultregion']);
}
}
/**
* Gets the visible name for the requested block region.
*
* @param string $region The region name to get
* @param string $theme The theme the region belongs to (may come from the parent theme)
* @return string
*/
protected function get_region_name($region, $theme) {
$regionstring = get_string('region-' . $region, 'theme_' . $theme);
// A name exists in this theme, so use it
if (substr($regionstring, 0, 1) != '[') {
return $regionstring;
}
// Otherwise, try to find one elsewhere
// Check parents, if any
foreach ($this->parents as $parentthemename) {
$regionstring = get_string('region-' . $region, 'theme_' . $parentthemename);
if (substr($regionstring, 0, 1) != '[') {
return $regionstring;
}
}
// Last resort, try the base theme for names
return get_string('region-' . $region, 'theme_base');
}
/**
* Get the list of all block regions known to this theme in all templates.
*
* @return array internal region name => human readable name.
*/
public function get_all_block_regions() {
$regions = array();
foreach ($this->layouts as $layoutinfo) {
foreach ($layoutinfo['regions'] as $region) {
$regions[$region] = $this->get_region_name($region, $this->name);
}
}
return $regions;
}
/**
* Returns the human readable name of the theme
*
* @return string
*/
public function get_theme_name() {
return get_string('pluginname', 'theme_'.$this->name);
}
}
/**
* This class keeps track of which HTML tags are currently open.
*
* This makes it much easier to always generate well formed XHTML output, even
* if execution terminates abruptly. Any time you output some opening HTML
* without the matching closing HTML, you should push the necessary close tags
* onto the stack.
*
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.0
* @package core
* @category output
*/
class xhtml_container_stack {
/**
* @var array Stores the list of open containers.
*/
protected $opencontainers = array();
/**
* @var array In developer debug mode, stores a stack trace of all opens and
* closes, so we can output helpful error messages when there is a mismatch.
*/
protected $log = array();
/**
* @var boolean Store whether we are developer debug mode. We need this in
* several places including in the destructor where we may not have access to $CFG.
*/
protected $isdebugging;
/**
* Constructor
*/
public function __construct() {
$this->isdebugging = debugging('', DEBUG_DEVELOPER);
}
/**
* Push the close HTML for a recently opened container onto the stack.
*
* @param string $type The type of container. This is checked when {@link pop()}
* is called and must match, otherwise a developer debug warning is output.
* @param string $closehtml The HTML required to close the container.
*/
public function push($type, $closehtml) {
$container = new stdClass;
$container->type = $type;
$container->closehtml = $closehtml;
if ($this->isdebugging) {
$this->log('Open', $type);
}
array_push($this->opencontainers, $container);
}
/**
* Pop the HTML for the next closing container from the stack. The $type
* must match the type passed when the container was opened, otherwise a
* warning will be output.
*
* @param string $type The type of container.
* @return string the HTML required to close the container.
*/
public function pop($type) {
if (empty($this->opencontainers)) {
debugging('<p>There are no more open containers. This suggests there is a nesting problem.</p>' .
$this->output_log(), DEBUG_DEVELOPER);
return;
}
$container = array_pop($this->opencontainers);
if ($container->type != $type) {
debugging('<p>The type of container to be closed (' . $container->type .
') does not match the type of the next open container (' . $type .
'). This suggests there is a nesting problem.</p>' .
$this->output_log(), DEBUG_DEVELOPER);
}
if ($this->isdebugging) {
$this->log('Close', $type);
}
return $container->closehtml;
}
/**
* Close all but the last open container. This is useful in places like error
* handling, where you want to close all the open containers (apart from <body>)
* before outputting the error message.
*
* @param bool $shouldbenone assert that the stack should be empty now - causes a
* developer debug warning if it isn't.
* @return string the HTML required to close any open containers inside <body>.
*/
public function pop_all_but_last($shouldbenone = false) {
if ($shouldbenone && count($this->opencontainers) != 1) {
debugging('<p>Some HTML tags were opened in the body of the page but not closed.</p>' .
$this->output_log(), DEBUG_DEVELOPER);
}
$output = '';
while (count($this->opencontainers) > 1) {
$container = array_pop($this->opencontainers);
$output .= $container->closehtml;
}
return $output;
}
/**
* You can call this function if you want to throw away an instance of this
* class without properly emptying the stack (for example, in a unit test).
* Calling this method stops the destruct method from outputting a developer
* debug warning. After calling this method, the instance can no longer be used.
*/
public function discard() {
$this->opencontainers = null;
}
/**
* Adds an entry to the log.
*
* @param string $action The name of the action
* @param string $type The type of action
*/
protected function log($action, $type) {
$this->log[] = '<li>' . $action . ' ' . $type . ' at:' .
format_backtrace(debug_backtrace()) . '</li>';
}
/**
* Outputs the log's contents as a HTML list.
*
* @return string HTML list of the log
*/
protected function output_log() {
return '<ul>' . implode("\n", $this->log) . '</ul>';
}
}
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