/lib/outputlib.php
PHP | 2086 lines | 1085 code | 226 blank | 775 comment | 249 complexity | b76c3fbfc7db17db4e61648445c5c3f7 MD5 | raw file
Possible License(s): GPL-3.0, LGPL-2.1, BSD-3-Clause, Apache-2.0
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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, $PAGE;
- $next = time();
- if (isset($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', $next); // time is unique even when you reset/switch database
- if (!empty($CFG->themedesignermode)) {
- $cache = cache::make_from_params(cache_store::MODE_APPLICATION, 'core', 'themedesigner');
- $cache->purge();
- }
- if ($PAGE) {
- $PAGE->reload_theme();
- }
- }
- /**
- * Enable or disable theme designer mode.
- *
- * @param bool $state
- */
- function theme_set_designer_mod($state) {
- set_config('themedesignermode', (int)!empty($state));
- // Reset caches after switching mode so that any designer mode caches get purged too.
- theme_reset_all_caches();
- }
- /**
- * 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 $PAGE->theme.
- *
- * @copyright 2009 Tim Hunt
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- * @since Moodle 2.0
- * @package core
- * @category output
- */
- class theme_config {
- /**
- * @var string Default theme, used when requested theme not found.
- */
- const DEFAULT_THEME = 'clean';
- /**
- * @var array You can base your theme on other themes by linking to the other theme as
- * parents. This lets you use the CSS and layouts from the other themes
- * (see {@link theme_config::$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 < > » - 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 < > » - 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 array list of YUI CSS modules to be included on each page. This may be used
- * to remove cssreset and use cssnormalise module instead.
- */
- public $yuicssmodules = array('cssreset', 'cssfonts', 'cssgrids', 'cssbase');
- /**
- * An associative array of block manipulations that should be made if the user is using an rtl language.
- * The key is the original block region, and the value is the block region to change to.
- * This is used when displaying blocks for regions only.
- * @var array
- */
- public $blockrtlmanipulations = array();
- /**
- * @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;
- /**
- * The LESS file to compile. When set, the theme will attempt to compile the file itself.
- * @var bool
- */
- public $lessfile = false;
- /**
- * The name of the function to call to get the LESS code to inject.
- * @var string
- */
- public $extralesscallback = null;
- /**
- * The name of the function to call to get extra LESS variables.
- * @var string
- */
- public $lessvariablescallback = null;
- /**
- * Sets the render method that should be used for rendering custom block regions by scripts such as my/index.php
- * Defaults to {@link core_renderer::blocks_for_region()}
- * @var string
- */
- public $blockrendermethod = 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 ($themename == theme_config::DEFAULT_THEME) {
- throw new coding_exception('Default theme '.theme_config::DEFAULT_THEME.' not available or broken!');
- } else if ($config = theme_config::find_theme_config($CFG->theme, $settings)) {
- return new theme_config($config);
- } 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;
- }
- $configurable = array('parents', 'sheets', 'parents_exclude_sheets', 'plugins_exclude_sheets', 'javascripts', 'javascripts_footer',
- 'parents_exclude_javascripts', 'layouts', 'enable_dock', 'enablecourseajax', 'supportscssoptimisation',
- 'rendererfactory', 'csspostprocess', 'editor_sheets', 'rarrow', 'larrow', 'hidefromselector', 'doctype',
- 'yuicssmodules', 'blockrtlmanipulations', 'lessfile', 'extralesscallback', 'lessvariablescallback',
- 'blockrendermethod');
- foreach ($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;
- }
- $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();
- }
- /**
- * Let the theme initialise the page object (usually $PAGE).
- *
- * This may be used for example to request jQuery in add-ons.
- *
- * @param moodle_page $page
- */
- public function init_page(moodle_page $page) {
- $themeinitfunction = 'theme_'.$this->name.'_page_init';
- if (function_exists($themeinitfunction)) {
- $themeinitfunction($page);
- }
- }
- /**
- * Checks if arrows $THEME->rarrow, $THEME->larrow have been set (theme/-/config.php).
- * If not it applies sensible defaults.
- *
- * Accessibility: right and left arrow Unicode characters for breadcrumb, calendar,
- * search forum block, etc. Important: these are 'silent' in a screen-reader
- * (unlike > »), and must be accompanied by text.
- */
- private function check_theme_arrows() {
- if (!isset($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 = '►';
- $this->larrow = '◄';
- if (empty($_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 = '▶';
- $this->larrow = '◀';
- }
- elseif ((false !== strpos($uagent, 'Konqueror'))
- || (false !== strpos($uagent, 'Android'))) {
- // The fonts on Android don't include the characters required for this to work as expected.
- // So we use the same ones Konqueror uses.
- $this->rarrow = '→';
- $this->larrow = '←';
- }
- elseif (isset($_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 = '>';
- $this->larrow = '<';
- }
- // 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 $encoded false means use & and true use & in URLs
- * @return moodle_url
- */
- public function editor_css_url($encoded=true) {
- global $CFG;
- $rev = theme_get_revision();
- if ($rev > -1) {
- $url = new moodle_url("$CFG->httpswwwroot/theme/styles.php");
- if (!empty($CFG->slasharguments)) {
- $url->set_slashargument('/'.$this->name.'/'.$rev.'/editor', 'noparam', true);
- } else {
- $url->params(array('theme'=>$this->name,'rev'=>$rev, 'type'=>'editor'));
- }
- } else {
- $params = array('theme'=>$this->name, 'type'=>'editor');
- $url = new moodle_url($CFG->httpswwwroot.'/theme/styles_debug.php', $params);
- }
- return $url;
- }
- /**
- * Returns the content of the CSS to be used in editor content
- *
- * @return array
- */
- public function editor_css_files() {
- $files = array();
- // First editor plugins.
- $plugins = core_component::get_plugin_list('editor');
- foreach ($plugins as $plugin=>$fulldir) {
- $sheetfile = "$fulldir/editor_styles.css";
- if (is_readable($sheetfile)) {
- $files['plugin_'.$plugin] = $sheetfile;
- }
- }
- // Then parent themes - base first, the immediate parent last.
- foreach (array_reverse($this->parent_configs) as $parent_config) {
- if (empty($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 moodle_url[]
- */
- public function css_urls(moodle_page $page) {
- global $CFG;
- $rev = theme_get_revision();
- $urls = array();
- $svg = $this->use_svg_icons();
- $separate = (core_useragent::is_ie() && !core_useragent::check_ie_version('10'));
- if ($rev > -1) {
- $url = new moodle_url("$CFG->httpswwwroot/theme/styles.php");
- if (!empty($CFG->slasharguments)) {
- $slashargs = '';
- if (!$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.
- $slashargs .= '/_s'.$slashargs;
- }
- $slashargs .= '/'.$this->name.'/'.$rev.'/all';
- if ($separate) {
- $slashargs .= '/chunk0';
- }
- $url->set_slashargument($slashargs, 'noparam', true);
- } else {
- $params = array('theme' => $this->name,'rev' => $rev, 'type' => 'all');
- if (!$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.
- $params['svg'] = '0';
- }
- if ($separate) {
- $params['chunk'] = '0';
- }
- $url->params($params);
- }
- $urls[] = $url;
- } else {
- $baseurl = new moodle_url($CFG->httpswwwroot.'/theme/styles_debug.php');
- $css = $this->get_css_files(true);
- if (!$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.
- $baseurl->param('svg', '0');
- }
- if ($separate) {
- // We might need to chunk long files.
- $baseurl->param('chunk', '0');
- }
- if (core_useragent::is_ie()) {
- // 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));
- }
- if (!empty($this->lessfile)) {
- // No need to define the type as IE here.
- $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'less'));
- }
- $urls[] = new moodle_url($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 => $filename) {
- if ($sheet === $this->lessfile) {
- // This is the theme LESS file.
- $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'less'));
- } else {
- // Sheet first in order to make long urls easier to read.
- $urls[] = new moodle_url($baseurl, array('sheet'=>$sheet, 'theme'=>$this->name, 'type'=>'theme'));
- }
- }
- }
- }
- return $urls;
- }
- /**
- * Get the whole css stylesheet for production mode.
- *
- * NOTE: this method is not expected to be used from any addons.
- *
- * @return string CSS markup, already optimised and compressed
- */
- public function get_css_content() {
- global $CFG;
- require_once($CFG->dirroot.'/lib/csslib.php');
- $csscontent = '';
- foreach ($this->get_css_files(false) as $type => $value) {
- foreach ($value as $identifier => $val) {
- if (is_array($val)) {
- foreach ($val as $v) {
- $csscontent .= file_get_contents($v) . "\n";
- }
- } else {
- if ($type === 'theme' && $identifier === $this->lessfile) {
- // We need the content from LESS because this is the LESS file from the theme.
- $csscontent .= $this->get_css_content_from_less(false);
- } else {
- $csscontent .= file_get_contents($val) . "\n";
- }
- }
- }
- }
- $csscontent = $this->post_process($csscontent);
- if (!empty($CFG->enablecssoptimiser) && $this->supportscssoptimisation) {
- // This is an experimental feature introduced in Moodle 2.3
- // The CSS optimiser organises the CSS in order to reduce the overall number
- // of rules and styles being sent to the client. It does this by collating
- // the CSS before it is cached removing excess styles and rules and stripping
- // out any extraneous content such as comments and empty rules.
- $optimiser = new css_optimiser();
- $csscontent = $optimiser->process($csscontent);
- } else {
- $csscontent = core_minify::css($csscontent);
- }
- return $csscontent;
- }
- /**
- * Get the theme designer css markup,
- * the parameters are coming from css_urls().
- *
- * NOTE: this method is not expected to be used from any addons.
- *
- * @param string $type
- * @param string $subtype
- * @param string $sheet
- * @return string CSS markup
- */
- public function get_css_content_debug($type, $subtype, $sheet) {
- global $CFG;
- require_once($CFG->dirroot.'/lib/csslib.php');
- // The LESS file of the theme is requested.
- if ($type === 'less') {
- $csscontent = $this->get_css_content_from_less(true);
- if ($csscontent !== false) {
- return $csscontent;
- }
- return '';
- }
- $optimiser = null;
- if (!empty($CFG->enablecssoptimiser) && $this->supportscssoptimisation) {
- // This is an experimental feature introduced in Moodle 2.3
- // The CSS optimiser organises the CSS in order to reduce the overall number
- // of rules and styles being sent to the client. It does this by collating
- // the CSS before it is cached removing excess styles and rules and stripping
- // out any extraneous content such as comments and empty rules.
- $optimiser = new css_optimiser();
- }
- $cssfiles = array();
- $css = $this->get_css_files(true);
- if ($type === 'ie') {
- // IE is a sloppy browser with weird limits, sorry.
- if ($subtype === 'plugins') {
- $cssfiles = $css['plugins'];
- } else if ($subtype === 'parents') {
- if (empty($sheet)) {
- // Do not bother with the empty parent here.
- } else {
- // Build up the CSS for that parent so we can serve it as one file.
- foreach ($css[$subtype][$sheet] as $parent => $css) {
- $cssfiles[] = $css;
- }
- }
- } else if ($subtype === 'theme') {
- $cssfiles = $css['theme'];
- foreach ($cssfiles as $key => $value) {
- if ($this->lessfile && $key === $this->lessfile) {
- // Remove the LESS file from the theme CSS files.
- // The LESS files use the type 'less', not 'ie'.
- unset($cssfiles[$key]);
- }
- }
- }
- } else if ($type === 'plugin') {
- if (isset($css['plugins'][$subtype])) {
- $cssfiles[] = $css['plugins'][$subtype];
- }
- } else if ($type === 'parent') {
- if (isset($css['parents'][$subtype][$sheet])) {
- $cssfiles[] = $css['parents'][$subtype][$sheet];
- }
- } else if ($type === 'theme') {
- if (isset($css['theme'][$sheet])) {
- $cssfiles[] = $css['theme'][$sheet];
- }
- }
- $csscontent = '';
- foreach ($cssfiles as $file) {
- $contents = file_get_contents($file);
- $contents = $this->post_process($contents);
- $comment = "/** Path: $type $subtype $sheet.' **/\n";
- $stats = '';
- if ($optimiser) {
- $contents = $optimiser->process($contents);
- if (!empty($CFG->cssoptimiserstats)) {
- $stats = $optimiser->output_stats_css();
- }
- }
- $csscontent .= $comment.$stats.$contents."\n\n";
- }
- return $csscontent;
- }
- /**
- * Get the whole css stylesheet for editor iframe.
- *
- * NOTE: this method is not expected to be used from any addons.
- *
- * @return string CSS markup
- */
- public function get_css_content_editor() {
- // Do not bother to optimise anything here, just very basic stuff.
- $cssfiles = $this->editor_css_files();
- $css = '';
- foreach ($cssfiles as $file) {
- $css .= file_get_contents($file)."\n";
- }
- return $this->post_process($css);
- }
- /**
- * Returns an array of organised CSS files required for this output.
- *
- * @param bool $themedesigner
- * @return array nested array of file paths
- */
- protected function get_css_files($themedesigner) {
- global $CFG;
- $cache = null;
- $cachekey = 'cssfiles';
- if ($themedesigner) {
- require_once($CFG->dirroot.'/lib/csslib.php');
- // We need some kind of caching here because otherwise the page navigation becomes
- // way too slow in theme designer mode. Feel free to create full cache definition later...
- $cache = cache::make_from_params(cache_store::MODE_APPLICATION, 'core', 'themedesigner', array('theme' => $this->name));
- if ($files = $cache->get($cachekey)) {
- if ($files['created'] > time() - THEME_DESIGNER_CACHE_LIFETIME) {
- unset($files['created']);
- return $files;
- }
- }
- }
- $cssfiles = array('plugins'=>array(), 'parents'=>array(), 'theme'=>array());
- // Get all plugin sheets.
- $excludes = $this->resolve_excludes('plugins_exclude_sheets');
- if ($excludes !== true) {
- foreach (core_component::get_plugin_types() as $type=>$unused) {
- if ($type === 'theme' || (!empty($excludes[$type]) and $excludes[$type] === true)) {
- continue;
- }
- $plugins = core_component::get_plugin_list($type);
- foreach ($plugins as $plugin=>$fulldir) {
- if (!empty($excludes[$type]) and is_array($excludes[$type])
- and in_array($plugin, $excludes[$type])) {
- continue;
- }
- // Get the CSS from the plugin.
- $sheetfile = "$fulldir/styles.css";
- if (is_readable($sheetfile)) {
- $cssfiles['plugins'][$type.'_'.$plugin] = $sheetfile;
- }
- // Create a list of candidate sheets from parents (direct parent last) and current theme.
- $candidates = array();
- foreach (array_reverse($this->parent_configs) as $parent_config) {
- $candidates[] = $parent_config->name;
- }
- $candidates[] = $this->name;
- // Add the sheets found.
- foreach ($candidates as $candidate) {
- $sheetthemefile = "$fulldir/styles_{$candidate}.css";
- if (is_readable($sheetthemefile)) {
- $cssfiles['plugins'][$type.'_'.$plugin.'_'.$candidate] = $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[$parent]) && is_array($excludes[$parent])
- && in_array($sheet, $excludes[$parent])) {
- continue;
- }
- // We never refer to the parent LESS files.
- $sheetfile = "$parent_config->dir/style/$sheet.css";
- if (is_readable($sheetfile)) {
- $cssfiles['parents'][$parent][$sheet] = $sheetfile;
- }
- }
- }
- }
- // Current theme sheets and less file.
- // We first add the LESS files because we want the CSS ones to be included after the
- // LESS code. However, if both the LESS file and the CSS file share the same name,
- // the CSS file is ignored.
- if (!empty($this->lessfile)) {
- $sheetfile = "{$this->dir}/less/{$this->lessfile}.less";
- if (is_readable($sheetfile)) {
- $cssfiles['theme'][$this->lessfile] = $sheetfile;
- }
- }
- if (is_array($this->sheets)) {
- foreach ($this->sheets as $sheet) {
- $sheetfile = "$this->dir/style/$sheet.css";
- if (is_readable($sheetfile) && !isset($cssfiles['theme'][$sheet])) {
- $cssfiles['theme'][$sheet] = $sheetfile;
- }
- }
- }
- if ($cache) {
- $files = $cssfiles;
- $files['created'] = time();
- $cache->set($cachekey, $files);
- }
- return $cssfiles;
- }
- /**
- * Return the CSS content generated from LESS the file.
- *
- * @param bool $themedesigner True if theme designer is enabled.
- * @return bool|string Return false when the compilation failed. Else the compiled string.
- */
- protected function get_css_content_from_less($themedesigner) {
- $lessfile = $this->lessfile;
- if (!$lessfile || !is_readable($this->dir . '/less/' . $lessfile . '.less')) {
- throw new coding_exception('The theme did not define a LESS file, or it is not readable.');
- }
- // We might need more memory to do this, so let's play safe.
- raise_memory_limit(MEMORY_EXTRA);
- // Files list.
- $files = $this->get_css_files($themedesigner);
- // Get the LESS file path.
- $themelessfile = $files['theme'][$lessfile];
- // Setup compiler options.
- $options = array(
- // We need to set the import directory to where $lessfile is.
- 'import_dirs' => array(dirname($themelessfile) => '/'),
- // Always disable default caching.
- 'cache_method' => false,
- // Disable the relative URLs, we have post_process() to handle that.
- 'relativeUrls' => false,
- );
- if ($themedesigner) {
- // Add the sourceMap inline to ensure that it is atomically generated.
- $options['sourceMap'] = true;
- $options['sourceRoot'] = 'theme';
- }
- // Instantiate the compiler.
- $compiler = new core_lessc($options);
- try {
- $compiler->parse_file_content($themelessfile);
- // Get the callbacks.
- $compiler->parse($this->get_extra_less_code());
- $compiler->ModifyVars($this->get_less_variables());
- // Compile the CSS.
- $compiled = $compiler->getCss();
- // Post process the entire thing.
- $compiled = $this->post_process($compiled);
- } catch (Less_Exception_Parser $e) {
- $compiled = false;
- debugging('Error while compiling LESS ' . $lessfile . ' file: ' . $e->getMessage(), DEBUG_DEVELOPER);
- }
- // Try to save memory.
- $compiler = null;
- unset($compiler);
- return $compiled;
- }
- /**
- * Return extra LESS variables to use when compiling.
- *
- * @return array Where keys are the variable names (omitting the @), and the values are the value.
- */
- protected function get_less_variables() {
- $variables = array();
- // Getting all the candidate functions.
- $candidates = array();
- foreach ($this->parent_configs as $parent_config) {
- if (!isset($parent_config->lessvariablescallback)) {
- continue;
- }
- $candidates[] = $parent_config->lessvariablescallback;
- }
- $candidates[] = $this->lessvariablescallback;
- // Calling the functions.
- foreach ($candidates as $function) {
- if (function_exists($function)) {
- $vars = $function($this);
- if (!is_array($vars)) {
- debugging('Callback ' . $function . ' did not return an array() as expected', DEBUG_DEVELOPER);
- continue;
- }
- $variables = array_merge($variables, $vars);
- }
- }
- return $variables;
- }
- /**
- * Return extra LESS code to add when compiling.
- *
- * This is intended to be used by themes to inject some LESS code
- * before it gets compiled. If you want to inject variables you
- * should use {@link self::get_less_variables()}.
- *
- * @return string The LESS code to inject.
- */
- protected function get_extra_less_code() {
- $content = '';
- // Getting all the candidate functions.
- $candidates = array();
- foreach ($this->parent_configs as $parent_config) {
- if (!isset($parent_config->extralesscallback)) {
- continue;
- }
- $candidates[] = $parent_config->extralesscallback;
- }
- $candidates[] = $this->extralesscallback;
- // Calling the functions.
- foreach ($candidates as $function) {
- if (function_exists($function)) {
- $content .= "\n/** Extra LESS from $function **/\n" . $function($this) . "\n";
- }
- }
- return $content;
- }
- /**
- * Generate a URL to the file that serves theme JavaScript files.
- *
- * If we determine that the theme has no relevant files, then we return
- * early with a null value.
- *
- * @param bool $inhead true means head url, false means footer
- * @return moodle_url|null
- */
- public function javascript_url($inhead) {
- global $CFG;
- $rev = theme_get_revision();
- $params = array('theme'=>$this->name,'rev'=>$rev);
- $params['type'] = $inhead ? 'head' : 'footer';
- // Return early if there are no files to serve
- if (count($this->javascript_files($params['type'])) === 0) {
- return null;
- }
- if (!empty($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('/\[\[pix:([a-z0-9_]+\|)?([^\]]+)\]\]/', $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…
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