class LibraryDiscoveryParser in Zircon Profile 8
Same name and namespace in other branches
- 8.0 core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php \Drupal\Core\Asset\LibraryDiscoveryParser
Parses library files to get extension data.
Hierarchy
- class \Drupal\Core\Asset\LibraryDiscoveryParser
Expanded class hierarchy of LibraryDiscoveryParser
1 file declares its use of LibraryDiscoveryParser
- LibraryDiscoveryParserTest.php in core/
tests/ Drupal/ Tests/ Core/ Asset/ LibraryDiscoveryParserTest.php - Contains \Drupal\Tests\Core\Asset\LibraryDiscoveryParserTest.
1 string reference to 'LibraryDiscoveryParser'
- core.services.yml in core/
core.services.yml - core/core.services.yml
1 service uses LibraryDiscoveryParser
File
- core/
lib/ Drupal/ Core/ Asset/ LibraryDiscoveryParser.php, line 23 - Contains \Drupal\Core\Asset\LibraryDiscoveryParser.
Namespace
Drupal\Core\AssetView source
class LibraryDiscoveryParser {
/**
* The module handler.
*
* @var \Drupal\Core\Extension\ModuleHandlerInterface
*/
protected $moduleHandler;
/**
* The theme manager.
*
* @var \Drupal\Core\Theme\ThemeManagerInterface
*/
protected $themeManager;
/**
* The app root.
*
* @var string
*/
protected $root;
/**
* Constructs a new LibraryDiscoveryParser instance.
*
* @param string $root
* The app root.
* @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
* The module handler.
*/
public function __construct($root, ModuleHandlerInterface $module_handler, ThemeManagerInterface $theme_manager) {
$this->root = $root;
$this->moduleHandler = $module_handler;
$this->themeManager = $theme_manager;
}
/**
* Parses and builds up all the libraries information of an extension.
*
* @param string $extension
* The name of the extension that registered a library.
*
* @return array
* All library definitions of the passed extension.
*
* @throws \Drupal\Core\Asset\Exception\IncompleteLibraryDefinitionException
* Thrown when a library has no js/css/setting.
* @throws \UnexpectedValueException
* Thrown when a js file defines a positive weight.
*/
public function buildByExtension($extension) {
$libraries = array();
if ($extension === 'core') {
$path = 'core';
$extension_type = 'core';
}
else {
if ($this->moduleHandler
->moduleExists($extension)) {
$extension_type = 'module';
}
else {
$extension_type = 'theme';
}
$path = $this
->drupalGetPath($extension_type, $extension);
}
$libraries = $this
->parseLibraryInfo($extension, $path);
$libraries = $this
->applyLibrariesOverride($libraries, $extension);
foreach ($libraries as $id => &$library) {
if (!isset($library['js']) && !isset($library['css']) && !isset($library['drupalSettings'])) {
throw new IncompleteLibraryDefinitionException(sprintf("Incomplete library definition for definition '%s' in extension '%s'", $id, $extension));
}
$library += array(
'dependencies' => array(),
'js' => array(),
'css' => array(),
);
if (isset($library['header']) && !is_bool($library['header'])) {
throw new \LogicException(sprintf("The 'header' key in the library definition '%s' in extension '%s' is invalid: it must be a boolean.", $id, $extension));
}
if (isset($library['version'])) {
// @todo Retrieve version of a non-core extension.
if ($library['version'] === 'VERSION') {
$library['version'] = \Drupal::VERSION;
}
elseif ($library['version'][0] === 'v') {
$library['version'] = substr($library['version'], 1);
}
}
// If this is a 3rd party library, the license info is required.
if (isset($library['remote']) && !isset($library['license'])) {
throw new LibraryDefinitionMissingLicenseException(sprintf("Missing license information in library definition for definition '%s' extension '%s': it has a remote, but no license.", $id, $extension));
}
// Assign Drupal's license to libraries that don't have license info.
if (!isset($library['license'])) {
$library['license'] = array(
'name' => 'GNU-GPL-2.0-or-later',
'url' => 'https://www.drupal.org/licensing/faq',
'gpl-compatible' => TRUE,
);
}
foreach (array(
'js',
'css',
) as $type) {
// Prepare (flatten) the SMACSS-categorized definitions.
// @todo After Asset(ic) changes, retain the definitions as-is and
// properly resolve dependencies for all (css) libraries per category,
// and only once prior to rendering out an HTML page.
if ($type == 'css' && !empty($library[$type])) {
foreach ($library[$type] as $category => $files) {
foreach ($files as $source => $options) {
if (!isset($options['weight'])) {
$options['weight'] = 0;
}
// Apply the corresponding weight defined by CSS_* constants.
$options['weight'] += constant('CSS_' . strtoupper($category));
$library[$type][$source] = $options;
}
unset($library[$type][$category]);
}
}
foreach ($library[$type] as $source => $options) {
unset($library[$type][$source]);
// Allow to omit the options hashmap in YAML declarations.
if (!is_array($options)) {
$options = array();
}
if ($type == 'js' && isset($options['weight']) && $options['weight'] > 0) {
throw new \UnexpectedValueException("The {$extension}/{$id} library defines a positive weight for '{$source}'. Only negative weights are allowed (but should be avoided). Instead of a positive weight, specify accurate dependencies for this library.");
}
// Unconditionally apply default groups for the defined asset files.
// The library system is a dependency management system. Each library
// properly specifies its dependencies instead of relying on a custom
// processing order.
if ($type == 'js') {
$options['group'] = JS_LIBRARY;
}
elseif ($type == 'css') {
$options['group'] = $extension_type == 'theme' ? CSS_AGGREGATE_THEME : CSS_AGGREGATE_DEFAULT;
}
// By default, all library assets are files.
if (!isset($options['type'])) {
$options['type'] = 'file';
}
if ($options['type'] == 'external') {
$options['data'] = $source;
}
else {
if ($source[0] === '/') {
// An absolute path maps to DRUPAL_ROOT / base_path().
if ($source[1] !== '/') {
$options['data'] = substr($source, 1);
}
else {
$options['type'] = 'external';
$options['data'] = $source;
}
}
elseif ($this
->fileValidUri($source)) {
$options['data'] = $source;
}
elseif ($this
->isValidUri($source)) {
$options['type'] = 'external';
$options['data'] = $source;
}
else {
$options['data'] = $path . '/' . $source;
}
}
if (!isset($library['version'])) {
// @todo Get the information from the extension.
$options['version'] = -1;
}
else {
$options['version'] = $library['version'];
}
// Set the 'minified' flag on JS file assets, default to FALSE.
if ($type == 'js' && $options['type'] == 'file') {
$options['minified'] = isset($options['minified']) ? $options['minified'] : FALSE;
}
$library[$type][] = $options;
}
}
}
return $libraries;
}
/**
* Parses a given library file and allows modules and themes to alter it.
*
* This method sets the parsed information onto the library property.
*
* Library information is parsed from *.libraries.yml files; see
* editor.library.yml for an example. Every library must have at least one js
* or css entry. Each entry starts with a machine name and defines the
* following elements:
* - js: A list of JavaScript files to include. Each file is keyed by the file
* path. An item can have several attributes (like HTML
* attributes). For example:
* @code
* js:
* path/js/file.js: { attributes: { defer: true } }
* @endcode
* If the file has no special attributes, just use an empty object:
* @code
* js:
* path/js/file.js: {}
* @endcode
* The path of the file is relative to the module or theme directory, unless
* it starts with a /, in which case it is relative to the Drupal root. If
* the file path starts with //, it will be treated as a protocol-free,
* external resource (e.g., //cdn.com/library.js). Full URLs
* (e.g., http://cdn.com/library.js) as well as URLs that use a valid
* stream wrapper (e.g., public://path/to/file.js) are also supported.
* - css: A list of categories for which the library provides CSS files. The
* available categories are:
* - base
* - layout
* - component
* - state
* - theme
* Each category is itself a key for a sub-list of CSS files to include:
* @code
* css:
* component:
* css/file.css: {}
* @endcode
* Just like with JavaScript files, each CSS file is the key of an object
* that can define specific attributes. The format of the file path is the
* same as for the JavaScript files.
* - dependencies: A list of libraries this library depends on.
* - version: The library version. The string "VERSION" can be used to mean
* the current Drupal core version.
* - header: By default, JavaScript files are included in the footer. If the
* script must be included in the header (along with all its dependencies),
* set this to true. Defaults to false.
* - minified: If the file is already minified, set this to true to avoid
* minifying it again. Defaults to false.
* - remote: If the library is a third-party script, this provides the
* repository URL for reference.
* - license: If the remote property is set, the license information is
* required. It has 3 properties:
* - name: The human-readable name of the license.
* - url: The URL of the license file/information for the version of the
* library used.
* - gpl-compatible: A Boolean for whether this library is GPL compatible.
*
* See https://www.drupal.org/node/2274843#define-library for more
* information.
*
* @param string $extension
* The name of the extension that registered a library.
* @param string $path
* The relative path to the extension.
*
* @return array
* An array of parsed library data.
*
* @throws \Drupal\Core\Asset\Exception\InvalidLibraryFileException
* Thrown when a parser exception got thrown.
*/
protected function parseLibraryInfo($extension, $path) {
$libraries = [];
$library_file = $path . '/' . $extension . '.libraries.yml';
if (file_exists($this->root . '/' . $library_file)) {
try {
$libraries = Yaml::decode(file_get_contents($this->root . '/' . $library_file));
} catch (InvalidDataTypeException $e) {
// Rethrow a more helpful exception to provide context.
throw new InvalidLibraryFileException(sprintf('Invalid library definition in %s: %s', $library_file, $e
->getMessage()), 0, $e);
}
}
// Allow modules to add dynamic library definitions.
$hook = 'library_info_build';
if ($this->moduleHandler
->implementsHook($extension, $hook)) {
$libraries = NestedArray::mergeDeep($libraries, $this->moduleHandler
->invoke($extension, $hook));
}
// Allow modules to alter the module's registered libraries.
$this->moduleHandler
->alter('library_info', $libraries, $extension);
$this->themeManager
->alter('library_info', $libraries, $extension);
return $libraries;
}
/**
* Apply libraries overrides specified for the current active theme.
*
* @param array $libraries
* The libraries definitions.
* @param string $extension
* The extension in which these libraries are defined.
*
* @return array
* The modified libraries definitions.
*/
protected function applyLibrariesOverride($libraries, $extension) {
$active_theme = $this->themeManager
->getActiveTheme();
// ActiveTheme::getLibrariesOverride() returns libraries-overrides for the
// current theme as well as all its base themes.
$all_libraries_overrides = $active_theme
->getLibrariesOverride();
foreach ($all_libraries_overrides as $theme_path => $libraries_overrides) {
foreach ($libraries as $library_name => $library) {
// Process libraries overrides.
if (isset($libraries_overrides["{$extension}/{$library_name}"])) {
// Active theme defines an override for this library.
$override_definition = $libraries_overrides["{$extension}/{$library_name}"];
if (is_string($override_definition) || $override_definition === FALSE) {
// A string or boolean definition implies an override (or removal)
// for the whole library. Use the override key to specify that this
// library will be overridden when it is called.
// @see \Drupal\Core\Asset\LibraryDiscovery::getLibraryByName()
if ($override_definition) {
$libraries[$library_name]['override'] = $override_definition;
}
else {
$libraries[$library_name]['override'] = FALSE;
}
}
elseif (is_array($override_definition)) {
// An array definition implies an override for an asset within this
// library.
foreach ($override_definition as $sub_key => $value) {
// Throw an exception if the asset is not properly specified.
if (!is_array($value)) {
throw new InvalidLibrariesOverrideSpecificationException(sprintf('Library asset %s is not correctly specified. It should be in the form "extension/library_name/sub_key/path/to/asset.js".', "{$extension}/{$library_name}/{$sub_key}"));
}
if ($sub_key === 'drupalSettings') {
// drupalSettings may not be overridden.
throw new InvalidLibrariesOverrideSpecificationException(sprintf('drupalSettings may not be overridden in libraries-override. Trying to override %s. Use hook_library_info_alter() instead.', "{$extension}/{$library_name}/{$sub_key}"));
}
elseif ($sub_key === 'css') {
// SMACSS category should be incorporated into the asset name.
foreach ($value as $category => $overrides) {
$this
->setOverrideValue($libraries[$library_name], [
$sub_key,
$category,
], $overrides, $theme_path);
}
}
else {
$this
->setOverrideValue($libraries[$library_name], [
$sub_key,
], $value, $theme_path);
}
}
}
}
}
}
return $libraries;
}
/**
* Wraps drupal_get_path().
*/
protected function drupalGetPath($type, $name) {
return drupal_get_path($type, $name);
}
/**
* Wraps file_valid_uri().
*/
protected function fileValidUri($source) {
return file_valid_uri($source);
}
/**
* Determines if the supplied string is a valid URI.
*/
protected function isValidUri($string) {
return count(explode('://', $string)) === 2;
}
/**
* Overrides the specified library asset.
*
* @param array $library
* The containing library definition.
* @param array $sub_key
* An array containing the sub-keys specifying the library asset, e.g.
* @code['js']@endcode or @code['css', 'component']@endcode
* @param array $overrides
* Specifies the overrides, this is an array where the key is the asset to
* be overridden while the value is overriding asset.
*/
protected function setOverrideValue(array &$library, array $sub_key, array $overrides, $theme_path) {
foreach ($overrides as $original => $replacement) {
// Get the attributes of the asset to be overridden. If the key does
// not exist, then throw an exception.
$key_exists = NULL;
$parents = array_merge($sub_key, [
$original,
]);
// Save the attributes of the library asset to be overridden.
$attributes = NestedArray::getValue($library, $parents, $key_exists);
if ($key_exists) {
// Remove asset to be overridden.
NestedArray::unsetValue($library, $parents);
// No need to replace if FALSE is specified, since that is a removal.
if ($replacement) {
// Ensure the replacement path is relative to drupal root.
$replacement = $this
->resolveThemeAssetPath($theme_path, $replacement);
$new_parents = array_merge($sub_key, [
$replacement,
]);
// Replace with an override if specified.
NestedArray::setValue($library, $new_parents, $attributes);
}
}
}
}
/**
* Ensures that a full path is returned for an overriding theme asset.
*
* @param string $theme_path
* The theme or base theme.
* @param string $overriding_asset
* The overriding library asset.
*
* @return string
* A fully resolved theme asset path relative to the Drupal directory.
*/
protected function resolveThemeAssetPath($theme_path, $overriding_asset) {
if ($overriding_asset[0] !== '/' && !$this
->isValidUri($overriding_asset)) {
// The destination is not an absolute path and it's not a URI (e.g.
// public://generated_js/example.js or http://example.com/js/my_js.js), so
// it's relative to the theme.
return '/' . $theme_path . '/' . $overriding_asset;
}
return $overriding_asset;
}
}Members
Name |
Modifiers | Type | Description | Overrides |
|---|---|---|---|---|
|
LibraryDiscoveryParser:: |
protected | property | The module handler. | |
|
LibraryDiscoveryParser:: |
protected | property | The app root. | |
|
LibraryDiscoveryParser:: |
protected | property | The theme manager. | |
|
LibraryDiscoveryParser:: |
protected | function | Apply libraries overrides specified for the current active theme. | |
|
LibraryDiscoveryParser:: |
public | function | Parses and builds up all the libraries information of an extension. | |
|
LibraryDiscoveryParser:: |
protected | function | Wraps drupal_get_path(). | 1 |
|
LibraryDiscoveryParser:: |
protected | function | Wraps file_valid_uri(). | 1 |
|
LibraryDiscoveryParser:: |
protected | function | Determines if the supplied string is a valid URI. | |
|
LibraryDiscoveryParser:: |
protected | function | Parses a given library file and allows modules and themes to alter it. | |
|
LibraryDiscoveryParser:: |
protected | function | Ensures that a full path is returned for an overriding theme asset. | |
|
LibraryDiscoveryParser:: |
protected | function | Overrides the specified library asset. | |
|
LibraryDiscoveryParser:: |
public | function | Constructs a new LibraryDiscoveryParser instance. |