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moodle/lib/outputlib.php
tjhunt 7d87587449 unittests: NOBUG fix pagelib unit tests
2009-09-30 16:24:05 +00:00

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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 constant is used for html attributes which need to have an empty
* value and still be output by the renderers (e.g. alt="");
*
* @constant @EMPTY@
*/
define('HTML_ATTR_EMPTY', '@EMPTY@');
require_once($CFG->libdir.'/outputcomponents.php');
require_once($CFG->libdir.'/outputactions.php');
require_once($CFG->libdir.'/outputfactories.php');
require_once($CFG->libdir.'/outputrenderers.php');
/**
* Functions for generating the HTML that Moodle should output.
*
* Please see http://docs.moodle.org/en/Developement:How_Moodle_outputs_HTML
* for an overview.
*
* @package moodlecore
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
/**
* 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 theme's 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 theme's 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
*/
class theme_config {
/**
* @var string the name of this theme. Set automatically when this theme is
* loaded. Please do not try to set this in your theme's config.php file.
*/
public $name;
/**
* @var string the folder where this themes files are stored. This is set
* automatically when the theme is loaded to $CFG->themedir . '/' . $this->name.
* Please do not try to set this in your theme's config.php file.
*/
public $dir;
/**
* @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('styles_layout', 'styles_fonts', 'styles_color');
/**
* You can base your theme on another theme by linking to the other theme as
* a parent. This lets you use the CSS from the other theme
* (see {@link $parentsheets}), or layout templates (see {@link $layouts}).
* That makes it easy to create a new theme that is similar to another one
* but with a few changes. In this theme's CSS you only need to override
* those rules you want to change.
*/
public $parent = null;
/**
* @var boolean|array Whether and which stylesheets from the parent theme
* to use in this theme. (Ignored if parent is null)
*
* Possible values are:
* false - no parent theme CSS.
* true - include all the normal parent theme CSS. Currently this means
* array('styles_layout', 'styles_fonts', 'styles_color').
* array - include just the listed stylesheets. Give the files names
* without the .css, as in the above example.
*/
public $parentsheets = false;
/**
* @var boolean|array Whether and which stylesheets from the standard theme
* to use in this theme.
*
* The advantages of using the standard stylesheets in your theme is that
* they give you a good basic layout, and when the Moodle core code is
* updated with new features, the standard theme CSS will be updated to match
* the changes in the code. Therefore, your theme is less likely to break
* when you upgrade Moodle.
*
* Possible values are:
* false - no standard theme CSS.
* true - include all the main standard theme CSS. Currently this means
* array('styles_layout', 'styles_fonts', 'styles_color').
* array - include just the listed stylesheets. Give the files names
* without the .css, as in the above example.
*/
public $standardsheets = true;
/**
* @var array use the CSS fragments from these types of plugins.
*
* All the plugins of the given types will be searched for a file called
* styles.php and, if found, these will be included with the CSS for this theme.
*
* This allows modules to provide some basic CSS so they work out of the box.
* You are strongly advised to leave this enabled, otherwise you will have to
* provide styling in your theme for every installed block, activity, course
* format, ... in your Moodle site.
*
* This setting is an array of plugin types, as in the {@link get_plugin_types()}
* function. The default value has been chosen to be the same as Moodle 1.9.
* This is not necessarily the best choice.
*
* The plugin CSS is included first, before any theme CSS. To be precise,
* if $standardsheets is true, the plugin CSS is included with the
* standard theme's CSS, otherwise if $parentsheets is true, the plugin CSS
* will be included with the parent theme's CSS, otherwise the plugin CSS
* will be include with this theme's CSS.
*/
public $pluginsheets = array('mod', 'block', 'format', 'gradereport');
/**
* @var boolean When this is true then Moodle will try to include a file
* meta.php from this theme into the <head></head> part of the page.
*/
public $metainclude = false;
/**
* @var boolean When this is true, and when this theme has a parent, then
* Moodle will try to include a file meta.php from the parent theme into the
* <head></head> part of the page.
*/
public $parentmetainclude = false;
/**
* @var boolean When this is true then Moodle will try to include the file
* meta.php from the standard theme into the <head></head> part of the page.
*/
public $standardmetainclude = true;
/**
* If true, then this theme must have a "pix" subdirectory that contains
* copies of all files from the moodle/pix directory, plus a "pix/mod"
* directory containing all the icons for all the activity modules.
*
* @var boolean
*/
public $custompix = false;
/**
* Which template to use for each general type of page.
*
* This is an array of arrays. The keys of the outer array are the different
* types of page. Pages in Moodle are categorised into one of a short list of
* types like 'normal', 'home', 'popup', 'form', .... The most reliable way
* to get a complete list is to look at
* {@link http://cvs.moodle.org/moodle/theme/standard/config.php?view=markup the standard theme config.php file}.
* That file also has a good example of how to set this setting.
*
* If Moodle encounters a general type of page that is not listed in your theme,
* then it will use the first layout. Therefore, should probably put 'normal'
* first in this array.
*
* For each page type, 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. Put this first, so if we encounter an unknown page type, this is used.
* 'normal' => array(
* 'layout' => 'parent:layout.php',
* 'regions' => array('side-pre', 'side-post'),
* 'defaultregion' => 'side-post'
* ),
* // The site home page.
* 'home' => array(
* 'layout' => 'layout-home.php',
* 'regions' => array('side-pre', 'side-post'),
* 'defaultregion' => 'side-post'
* ),
* // ...
* );
* </pre>
*
* 'layout' is the layout template to use for this type of page. You can
* specify this in one of three ways:
* <ol>
* <li><b>filename</b> for example 'layout-home.php' as above. Use that file from this theme.</li>
* <li><b>parent:filename</b> for example 'parent:layout.php' as above. Use the
* specified file from the parent theme. (Obviously, you can only do this
* if this theme has a parent!)</li>
* <li><b>standard:filename</b> for example 'standard:layout-popup.php'. Use
* the specified file from the standard theme.</li>
* </ol>
* To promote consistency, you are encouraged to call your layout files
* layout.php or layout-something.php.
*
* '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.)
*
* @var array
*/
public $layouts = array();
/*
* Time in seconds to cache the CSS style sheets for the chosen theme
*
* @var integer
*/
public $csslifetime = 1800;
/**
* With this you can control the colours of the big MP3 player
* that is used for MP3 resources.
*
* @var string
*/
public $resource_mp3player_colors = 'bgColour=000000&btnColour=ffffff&btnBorderColour=cccccc&iconColour=000000&iconOverColour=00cc00&trackColour=cccccc&handleColour=ffffff&loaderColour=ffffff&font=Arial&fontColour=3333FF&buffer=10&waitForPlay=no&autoPlay=yes';
/**
* With this you can control the colours of the small MP3 player
* that is used elsewhere
*.
* @var string
*/
public $filter_mediaplugin_colors = 'bgColour=000000&btnColour=ffffff&btnBorderColour=cccccc&iconColour=000000&iconOverColour=00cc00&trackColour=cccccc&handleColour=ffffff&loaderColour=ffffff&waitForPlay=yes';
/**
*$THEME->rarrow = '&#x25BA;' //OR '&rarr;';
*$THEME->larrow = '&#x25C4;' //OR '&larr;';
*$CFG->block_search_button = link_arrow_right(get_string('search'), $url='', $accesshide=true);
*
* Accessibility: Right and left arrow-like characters are
* 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 by (lib/weblib.php:check_theme_arrows). The suggestions
* above are 'silent' in a screen-reader like JAWS. Please DO NOT
* use &lt; &gt; &raquo; - these are confusing for blind users.
*/
/**
* Name of the renderer factory class to use.
*
* 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 renderers.php file in this theme (or the parent theme).</li>
* <li>{@link template_renderer_factory} - highly experimental! Do not use (yet).</li>
* </ul>
*
* @var string name of a class implementing the {@link renderer_factory} interface.
*/
public $rendererfactory = 'standard_renderer_factory';
/**
* Name of the icon finder class to use.
*
* This is an advanced feature. controls how Moodle converts from the icon
* names used in the code to URLs to embed in the HTML. You should not ever
* need to change this.
*
* @var string name of a class implementing the {@link icon_finder} interface.
*/
public $iconfinder = 'pix_icon_finder';
/**
* Function to do custom CSS processing.
*
* This is an advanced feature. If you want to do custom 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.
*
* There are two functions available that you may wish to use (defined in lib/outputlib.php):
* <ul>
* <li>{@link output_css_replacing_constants}</li>
* <li>{@link output_css_for_css_edit}</li>
* </ul>
*
* If you wish to write your own function, look at those two as examples,
* and it should be clear what you have to do.
*
* @var string the name of a function.
*/
public $customcssoutputfunction = null;
/**
* You can use this to control the cutoff point for strings
* in the navmenus (list of activities in popup menu etc)
* Default is 50 characters wide.
*/
public $navmenuwidth = 50;
/**
* By setting this to true, then you will have access to a
* new variable in your header.html and footer.html called
* $navmenulist ... this contains a simple XHTML menu of
* all activities in the current course, mostly useful for
* creating popup navigation menus and so on.
*/
public $makenavmenulist = false;
/**
* @var renderer_factory Instance of the renderer_factory implementation
* we are using. Implementation detail.
*/
protected $rf = null;
/**
* @var renderer_factory Instance of the icon_finder implementation we are
* using. Implementation detail.
*/
protected $if = 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;
// We have to use the variable name $THEME (upper case) because that
// is what is used in theme config.php files.
// Set some other standard properties of the theme.
$THEME = new theme_config;
$THEME->name = $themename;
$THEME->dir = $CFG->themedir . '/' . $themename;
// Load up the theme config
$configfile = $THEME->dir . '/config.php';
if (!is_readable($configfile)) {
throw new coding_exception('Cannot use theme ' . $themename .
'. The file ' . $configfile . ' does not exist or is not readable.');
}
include($configfile);
$THEME->update_legacy_information();
return $THEME;
}
/**
* Get the renderer for a part of Moodle for this theme.
* @param string $module the name of part of moodle. E.g. 'core', 'quiz', 'qtype_multichoice'.
* @param moodle_page $page the page we are rendering
* @param string $subtype optional subtype such as 'news' resulting to 'mod_forum_news'
* @return moodle_renderer_base the requested renderer.
*/
public function get_renderer($module, $page, $subtype=null) {
if (is_null($this->rf)) {
if (CLI_SCRIPT) {
$classname = 'cli_renderer_factory';
} else {
$classname = $this->rendererfactory;
}
$this->rf = new $classname($this);
}
return $this->rf->get_renderer($module, $page, $subtype);
}
/**
* Get the renderer for a part of Moodle for this theme.
* @return moodle_renderer_base the requested renderer.
*/
protected function get_icon_finder() {
if (is_null($this->if)) {
$classname = $this->iconfinder;
$this->if = new $classname($this);
}
return $this->if;
}
/**
* Return the URL for an icon identified as in pre-Moodle 2.0 code.
*
* Suppose you have old code like $url = "$CFG->pixpath/i/course.gif";
* then old_icon_url('i/course'); will return the equivalent URL that is correct now.
*
* @param string $iconname the name of the icon.
* @return string the URL for that icon.
*/
public function old_icon_url($iconname) {
return $this->get_icon_finder()->old_icon_url($iconname);
}
/**
* Return the URL for an icon identified as in pre-Moodle 2.0 code.
*
* Suppose you have old code like $url = "$CFG->modpixpath/$mod/icon.gif";
* then mod_icon_url('icon', $mod); will return the equivalent URL that is correct now.
*
* @param string $iconname the name of the icon.
* @param string $module the module the icon belongs to.
* @return string the URL for that icon.
*/
public function mod_icon_url($iconname, $module) {
return $this->get_icon_finder()->mod_icon_url($iconname, $module);
}
/**
* Get the list of stylesheet URLs that need to go in the header for this theme.
* @return array of URLs.
*/
public function get_stylesheet_urls() {
global $CFG;
// We need to tell the CSS that is being included (for example the standard
// theme CSS) which theme it is being included for. Prepare the necessary param.
$param = '?for=' . $this->name;
// Stylesheets, in order (standard, parent, this - some of which may be the same).
$stylesheets = array();
if ($this->name != 'standard' && $this->standardsheets) {
$stylesheets[] = $CFG->httpsthemewww . '/standard/styles.php' . $param;
}
if (!empty($this->parent)) {
$stylesheets[] = $CFG->httpsthemewww . '/' . $this->parent . '/styles.php' . $param;
}
$stylesheets[] = $CFG->httpsthemewww . '/' . $this->name . '/styles.php' . $param;
// Additional styles for right-to-left languages, if applicable.
if (right_to_left()) {
$stylesheets[] = $CFG->httpsthemewww . '/standard/rtl.css';
if (!empty($this->parent) && file_exists($CFG->themedir . '/' . $this->parent . '/rtl.css')) {
$stylesheets[] = $CFG->httpsthemewww . '/' . $this->parent . '/rtl.css';
}
if (file_exists($this->dir . '/rtl.css')) {
$stylesheets[] = $CFG->httpsthemewww . '/' . $this->name . '/rtl.css';
}
}
// If the theme wants pluginsheets, get them included in the first (most
// general) stylesheet we are including. That is, process them with the
// standard CSS if we are using that, else with the parent CSS, else with
// our own CSS.
if (!empty($this->pluginsheets)) {
$stylesheets[0] .= '&amp;pluginsheets=1';
}
return $stylesheets;
}
/**
* Get the meta tags from one theme to got in the <head> of the HTML.
* @param string $themename the name of the theme to get meta tags from.
* @param string $page that page whose <head> is being output.
* @return string HTML code.
*/
protected function get_theme_meta_tags($themename, $page) {
global $CFG;
// At least one theme's meta.php expects to have $PAGE visible.
$PAGE = $page;
$filename = $CFG->themedir . '/' . $themename . '/meta.php';
if (file_exists($filename)) {
ob_start();
include_once($filename);
$metatags = ob_get_contents();
ob_end_clean();
}
return $metatags;
}
/**
* Get all the meta tags (from this theme, standard, parent) that this theme
* wants in the <head> of the HTML.
*
* @param string $page that page whose <head> is being output.
* @return string HTML code.
*/
public function get_meta_tags($page) {
$metatags = '';
if ($this->standardmetainclude) {
$metatags .= $this->get_theme_meta_tags('standard', $page);
}
if ($this->parent && $this->parentmetainclude) {
$metatags .= $this->get_theme_meta_tags($this->parent, $page);
}
if ($this->metainclude) {
$metatags .= $this->get_theme_meta_tags($this->name, $page);
}
return $metatags;
}
/**
* Get the information from {@link $layouts} for this type of page.
* @param string $generaltype the general type of the page.
* @return array the appropriate part of {@link $layouts}.
*/
protected function layout_info_for_page($generaltype) {
if (array_key_exists($generaltype, $this->layouts)) {
return $this->layouts[$generaltype];
} else {
return reset($this->layouts);
}
}
/**
* Given the settings of this theme, and the page generaltype, return the
* full path of the page layout template to use.
*
* Used by {@link moodle_core_renderer::header()}. If an appropriate new-style
* template cannot be found, returns false to signal that the old-style
* header.html and footer.html files should be used.
*
* @param string $generaltype the general type of the page.
* @return string Full path to the template to use, or false if a new-style
* template cannot be found.
*/
public function template_for_page($generaltype) {
global $CFG;
// Legacy fallback.
if (empty($this->layouts)) {
return false;
}
$layoutinfo = $this->layout_info_for_page($generaltype);
$templatefile = $layoutinfo['layout'];
// Parse the name that was found.
if (strpos($templatefile, 'standard:') === 0) {
$templatepath = $CFG->themedir . '/standard/' . substr($templatefile, 9);
} else if (strpos($templatefile, 'parent:') === 0) {
if (empty($this->parent)) {
throw new coding_exception('This theme (' . $this->name .
') does not have a parent. You cannot specify a layout template like ' .
$templatefile);
}
$templatepath = $CFG->themedir . '/' . $this->parent . '/' . substr($templatefile, 7);
} else {
$templatepath = $this->dir . '/' . $templatefile;
}
// Check the template exists.
if (!is_readable($templatepath)) {
throw new coding_exception('The template ' . $templatefile . ' (' . $templatepath .
') for page type ' . $generaltype . ' cannot be found in this theme (' .
$this->name . ')');
}
return $templatepath;
}
/**
* Inform a block_manager about the block regions this theme wants on this
* type of page.
* @param string $generaltype the general type of the page.
* @param block_manager $blockmanager the block_manger to set up.
* @return void
*/
public function setup_blocks($generaltype, $blockmanager) {
// Legacy fallback.
if (empty($this->layouts)) {
if (!in_array($generaltype, array('form', 'popup', 'maintenance'))) {
$blockmanager->add_regions(array(BLOCK_POS_LEFT, BLOCK_POS_RIGHT));
$blockmanager->set_default_region(BLOCK_POS_RIGHT);
}
return;
}
$layoutinfo = $this->layout_info_for_page($generaltype);
if (!empty($layoutinfo['regions'])) {
$blockmanager->add_regions($layoutinfo['regions']);
$blockmanager->set_default_region($layoutinfo['defaultregion']);
} else {
$blockmanager->set_default_region('');
}
}
/**
* Get the list of all block regions known to this theme in all templates.
* @return array internal region name => human readable name.
*/
public function get_all_block_regions() {
// Legacy fallback.
if (empty($this->layouts)) {
return array(
'side-pre' => get_string('region-side-pre', 'theme_standard'),
'side-post' => get_string('region-side-post', 'theme_standard'),
);
}
$regions = array();
foreach ($this->layouts as $layoutinfo) {
$ownertheme = $this->name;
if (strpos($layoutinfo['layout'], 'standard:') === 0) {
$ownertheme = 'standard';
} else if (strpos($layoutinfo['layout'], 'parent:') === 0) {
$ownertheme = $this->parent;
}
foreach ($layoutinfo['regions'] as $region) {
$regions[$region] = get_string('region-' . $region, 'theme_' . $ownertheme);
}
}
return $regions;
}
/**
* Helper method used by {@link update_legacy_information()}. Update one entry
* in the $this->pluginsheets array, based on the legacy $property propery.
* @param string $plugintype e.g. 'mod'.
* @param string $property e.g. 'modsheets'.
* @return void
*/
protected function update_legacy_plugin_sheets($plugintype, $property) {
// In Moodle 1.9, modsheets etc. were ignored if standardsheets was false.
if (!empty($this->standardsheets) && property_exists($this, $property)) {
debugging('$THEME->' . $property . ' is deprecated. Please use the new $THEME->pluginsheets instead.', DEBUG_DEVELOPER);
if (!empty($this->$property) && !in_array($plugintype, $this->pluginsheets)) {
$this->pluginsheets[] = $plugintype;
} else if (empty($this->$property) && in_array($plugintype, $this->pluginsheets)) {
unset($this->pluginsheets[array_search($plugintype, $this->pluginsheets)]);
}
}
}
/**
* This method looks a the settings that have been loaded, to see whether
* any legacy things are being used, and outputs warning and tries to update
* things to use equivalent newer settings.
* @return void
*/
protected function update_legacy_information() {
global $CFG;
$this->update_legacy_plugin_sheets('mod', 'modsheets');
$this->update_legacy_plugin_sheets('block', 'blocksheets');
$this->update_legacy_plugin_sheets('format', 'formatsheets');
$this->update_legacy_plugin_sheets('gradereport', 'gradereportsheets');
if (!empty($this->langsheets)) {
debugging('$THEME->langsheets is no longer supported. No languages were ' .
'using it for anything, and it did not seem to serve any purpose.', DEBUG_DEVELOPER);
}
if (!empty($this->customcorners)) {
// $THEME->customcorners is deprecated but we provide support for it via the
// custom_corners_renderer_factory class in lib/deprecatedlib.php
debugging('$THEME->customcorners is deprecated. Please use the new $THEME->rendererfactory ' .
'to control HTML generation. Please use $this->rendererfactory = \'custom_corners_renderer_factory\'; ' .
'in your config.php file instead.', DEBUG_DEVELOPER);
$this->rendererfactory = 'custom_corners_renderer_factory';
}
if (!empty($this->cssconstants)) {
debugging('$THEME->cssconstants is deprecated. Please use ' .
'$THEME->customcssoutputfunction = \'output_css_replacing_constants\'; ' .
'in your config.php file instead.', DEBUG_DEVELOPER);
$this->customcssoutputfunction = 'output_css_replacing_constants';
}
if (!empty($this->CSSEdit)) {
debugging('$THEME->CSSEdit is deprecated. Please use ' .
'$THEME->customcssoutputfunction = \'output_css_for_css_edit\'; ' .
'in your config.php file instead.', DEBUG_DEVELOPER);
$this->customcssoutputfunction = 'output_css_for_css_edit';
}
if (!empty($CFG->smartpix)) {
$this->iconfinder = 'smartpix_icon_finder';
} else if ($this->custompix) {
$this->iconfinder = 'theme_icon_finder';
}
}
/**
* Set the variable $CFG->pixpath and $CFG->modpixpath to be the right
* ones for this theme. These should no longer be used, but legacy code
* might still rely on them.
* @return void
*/
public function setup_legacy_pix_paths() {
global $CFG;
if (!empty($CFG->smartpix)) {
if ($CFG->slasharguments) {
// Use this method if possible for better caching
$extra = '';
} else {
$extra = '?file=';
}
$CFG->pixpath = $CFG->httpswwwroot . '/pix/smartpix.php' . $extra . '/' . $this->name;
$CFG->modpixpath = $CFG->httpswwwroot . '/pix/smartpix.php' . $extra . '/' . $this->name . '/mod';
} else if (empty($THEME->custompix)) {
$CFG->pixpath = $CFG->httpswwwroot . '/pix';
$CFG->modpixpath = $CFG->httpswwwroot . '/mod';
} else {
$CFG->pixpath = $CFG->httpsthemewww . '/' . $this->name . '/pix';
$CFG->modpixpath = $CFG->httpsthemewww . '/' . $this->name . '/pix/mod';
}
}
}
/**
* 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
*/
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();
/**
* Store whether we are developer debug mode. We need this in several places
* including in the destructor where we may no thave access to $CFG.
* @var boolean
*/
protected $isdebugging;
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 $closehtml The HTML required to close the container.
* @return void
*/
public function push($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.
* @return void
*/
public function discard() {
$this->opencontainers = null;
}
/**
* Emergency fallback. If we get to the end of processing and not all
* containers have been closed, output the rest with a developer debug warning.
* @return void
*/
public function __destruct() {
if (empty($this->opencontainers)) {
return;
}
// It seems you cannot rely on $CFG, and hence the debugging function here,
// becuase $CFG may be destroyed before this object is.
if ($this->isdebugging) {
echo '<div class="notifytiny"><p>Some containers were left open. This suggests there is a nesting problem.</p>' .
$this->output_log() . '</div>';
}
echo $this->pop_all_but_last();
$container = array_pop($this->opencontainers);
echo $container->closehtml;
}
/**
* Adds an entry to the log.
* @param string $action The name of the action
* @param string $type The type of action
* @return void
*/
protected function log($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>';
}
}
/**
* An icon finder is responsible for working out the correct URL for an icon.
*
* A icon finder must also have a constructor that takes a theme object.
* (See {@link standard_icon_finder::__construct} for an example.)
*
* Note that we are planning to change the Moodle icon naming convention before
* the Moodle 2.0 release. Therefore, this API will probably change.
*
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.0
*/
interface icon_finder {
/**
* Return the URL for an icon identified as in pre-Moodle 2.0 code.
*
* Suppose you have old code like $url = "$CFG->pixpath/i/course.gif";
* then old_icon_url('i/course'); will return the equivalent URL that is correct now.
*
* @param string $iconname the name of the icon.
* @return string the URL for that icon.
*/
public function old_icon_url($iconname);
/**
* Return the URL for an icon identified as in pre-Moodle 2.0 code.
*
* Suppose you have old code like $url = "$CFG->modpixpath/$mod/icon.gif";
* then mod_icon_url('icon', $mod); will return the equivalent URL that is correct now.
*
* @param string $iconname the name of the icon.
* @param string $module the module the icon belongs to.
* @return string the URL for that icon.
*/
public function mod_icon_url($iconname, $module);
}
/**
* This icon finder implements the old scheme that was used when themes that had
* $THEME->custompix = false.
*
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.0
*/
class pix_icon_finder implements icon_finder {
/**
* Constructor
* @param theme_config $theme the theme we are finding icons for (which is irrelevant).
*/
public function __construct($theme) {
}
/**
* Implement interface method.
* @param string $iconname the name of the icon.
* @return string the URL for that icon.
*/
public function old_icon_url($iconname) {
global $CFG;
if (file_exists($CFG->dirroot . '/pix/' . $iconname . '.png')) {
return $CFG->httpswwwroot . '/pix/' . $iconname . '.png';
} else {
return $CFG->httpswwwroot . '/pix/' . $iconname . '.gif';
}
}
/**
* Implement interface method.
* @param string $iconname the name of the icon.
* @param string $module the module the icon belongs to.
* @return string the URL for that icon.
*/
public function mod_icon_url($iconname, $module) {
global $CFG;
if (file_exists($CFG->dirroot . '/mod/' . $module . '/' . $iconname . '.png')) {
return $CFG->httpswwwroot . '/mod/' . $module . '/' . $iconname . '.png';
} else {
return $CFG->httpswwwroot . '/mod/' . $module . '/' . $iconname . '.gif';
}
}
}
/**
* This icon finder implements the old scheme that was used for themes that had
* $THEME->custompix = true.
*
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.0
*/
class theme_icon_finder implements icon_finder {
protected $themename;
/**
* Constructor
* @param theme_config $theme the theme we are finding icons for.
*/
public function __construct($theme) {
$this->themename = $theme->name;
}
/**
* Implement interface method.
* @param string $iconname the name of the icon.
* @return string the URL for that icon.
*/
public function old_icon_url($iconname) {
global $CFG;
if (file_exists($CFG->themedir . '/' . $this->themename . '/pix/' . $iconname . '.png')) {
return $CFG->httpsthemewww . '/' . $this->themename . '/pix/' . $iconname . '.png';
} else {
return $CFG->httpsthemewww . '/' . $this->themename . '/pix/' . $iconname . '.gif';
}
}
/**
* Implement interface method.
* @param string $iconname the name of the icon.
* @param string $module the module the icon belongs to.
* @return string the URL for that icon.
*/
public function mod_icon_url($iconname, $module) {
global $CFG;
if (file_exists($CFG->themedir . '/' . $this->themename . '/pix/mod/' . $module . '/' . $iconname . '.png')) {
return $CFG->httpsthemewww . '/' . $this->themename . '/pix/mod/' . $module . '/' . $iconname . '.png';
} else {
return $CFG->httpsthemewww . '/' . $this->themename . '/pix/mod/' . $module . '/' . $iconname . '.gif';
}
}
}
/**
* This icon finder implements the algorithm in pix/smartpix.php.
*
* @copyright 2009 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.0
*/
class smartpix_icon_finder extends pix_icon_finder {
protected $places = array();
/**
* Constructor
* @param theme_config $theme the theme we are finding icons for.
*/
public function __construct($theme) {
global $CFG;
$this->places[$CFG->themedir . '/' . $theme->name . '/pix/'] =
$CFG->httpsthemewww . '/' . $theme->name . '/pix/';
if (!empty($theme->parent)) {
$this->places[$CFG->themedir . '/' . $theme->parent . '/pix/'] =
$CFG->httpsthemewww . '/' . $theme->parent . '/pix/';
}
}
/**
* Implement interface method.
* @param string $iconname the name of the icon.
* @return string the URL for that icon.
*/
public function old_icon_url($iconname) {
foreach ($this->places as $dirroot => $urlroot) {
if (file_exists($dirroot . $iconname . '.png')) {
return $dirroot . $iconname . '.png';
} else if (file_exists($dirroot . $iconname . '.gif')) {
return $dirroot . $iconname . '.gif';
}
}
return parent::old_icon_url($iconname);
}
/**
* Implement interface method.
* @param string $iconname the name of the icon.
* @param string $module the module the icon belongs to.
* @return string the URL for that icon.
*/
public function mod_icon_url($iconname, $module) {
foreach ($this->places as $dirroot => $urlroot) {
if (file_exists($dirroot . 'mod/' . $iconname . '.png')) {
return $dirroot . 'mod/' . $iconname . '.png';
} else if (file_exists($dirroot . 'mod/' . $iconname . '.gif')) {
return $dirroot . 'mod/' . $iconname . '.gif';
}
}
return parent::old_icon_url($iconname, $module);
}
}
/**
* Output CSS while replacing constants/variables. See MDL-6798 for details
*
* Information from Urs Hunkler:
*
* This is an adaptation of Shaun Inman's "CSS Server-side Constants" for Moodle.
* http://www.shauninman.com/post/heap/2005/08/09/css_constants
*
* To use, specify $THEME->customcssoutputfunction = 'output_css_replacing_constants';
* in your theme's config.php file.
*
* The constant definitions are written into a separate CSS file named like
* constants.css and loaded first in config.php. You can use constants for any
* CSS properties. The constant definition looks like:
* <code>
* \@server constants {
* fontColor: #3a2830;
* aLink: #116699;
* aVisited: #AA2200;
* aHover: #779911;
* pageBackground: #FFFFFF;
* backgroundColor: #EEEEEE;
* backgroundSideblockHeader: #a8a4e9;
* fontcolorSideblockHeader: #222222;
* color1: #98818b;
* color2: #bd807b;
* color3: #f9d1d7;
* color4: #e8d4d8;
* }
* </code>
*
* The lines in the CSS files using CSS constants look like:
* <code>
* body {
* font-size: 100%;
* background-color: pageBackground;
* color: fontColor;
* font-family: 'Bitstream Vera Serif', georgia, times, serif;
* margin: 0;
* padding: 0;
* }
* div#page {
* margin: 0 10px;
* padding-top: 5px;
* border-top-width: 10px;
* border-top-style: solid;
* border-top-color: color3;
* }
* div.clearer {
* clear: both;
* }
* a:link {
* color: aLink;
* }
* </code>
*
* @param array $files an array of the CSS fields that need to be output.
* @param array $toreplace for convenience. If you are going to output the names
* of the css files, for debugging purposes, then you should output
* str_replace($toreplace, '', $file); because it looks prettier.
* @return void
*/
function output_css_replacing_constants($files, $toreplace) {
// Get all the CSS.
ob_start();
foreach ($files as $file) {
$shortname = str_replace($toreplace, '', $file);
echo '/******* ' . $shortname . " start *******/\n\n";
@include_once($file);
echo '/******* ' . $shortname . " end *******/\n\n";
}
$css = ob_get_contents();
ob_end_clean();
if (preg_match_all("/@server\s+(?:variables|constants)\s*\{\s*([^\}]+)\s*\}\s*/i", $css, $matches)) {
$variables = array();
foreach ($matches[0] as $key => $server) {
$css = str_replace($server, '', $css);
preg_match_all("/([^:\}\s]+)\s*:\s*([^;\}]+);/", $matches[1][$key], $vars);
foreach ($vars[1] as $var => $value) {
$variables[$value] = $vars[2][$var];
}
}
$css = str_replace(array_keys($variables), array_values($variables), $css);
}
echo $css;
}
/**
* This CSS output function will link to CSS files rather than including them
* inline.
*
* The single CSS files can then be edited and saved with interactive
* CSS editors like CSSEdit. Any files that have a .php extension are still included
* inline.
*
* @param array $files an array of the CSS fields that need to be output.
* @param array $toreplace for convenience. If you are going to output the names
* of the css files, for debugging purposes, then you should output
* str_replace($toreplace, '', $file); because it looks prettier.
* @return void
*/
function output_css_for_css_edit($files, $toreplace) {
foreach ($files as $file) {
$shortname = str_replace($toreplace, '', $file);
echo '/* @group ' . $shortname . " */\n\n";
if (strpos($file, '.css') !== false) {
echo '@import url("' . $file . '");'."\n\n";
} else {
@include_once($file);
}
echo "/* @end */\n\n";
}
}
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