silverstripe-framework/view/ThemeResourceLoader.php

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<?php
namespace SilverStripe\View;
use Deprecation;
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/**
* Handles finding templates from a stack of template manifest objects.
*
* @package framework
* @subpackage view
*/
class ThemeResourceLoader {
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/**
* @var ThemeResourceLoader
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*/
private static $instance;
protected $base;
/**
* List of template "sets" that contain a test manifest, and have an alias.
* E.g. '$default'
*
* @var ThemeList[]
*/
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protected $sets = [];
/**
* @return ThemeResourceLoader
*/
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public static function instance() {
return self::$instance ? self::$instance : self::$instance = new self();
}
/**
* Set instance
*
* @param ThemeResourceLoader $instance
*/
public static function set_instance(ThemeResourceLoader $instance) {
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self::$instance = $instance;
}
public function __construct($base = null) {
$this->base = $base ? $base : BASE_PATH;
}
/**
* Add a new theme manifest for a given identifier. E.g. '$default'
*
* @param string $set
* @param ThemeList $manifest
*/
public function addSet($set, ThemeList $manifest) {
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$this->sets[$set] = $manifest;
}
/**
* Get a named theme set
*
* @param string $set
* @return ThemeList
*/
public function getSet($set) {
if(isset($this->sets[$set])) {
return $this->sets[$set];
}
return null;
}
/**
* Given a theme identifier, determine the path from the root directory
*
* The mapping from $identifier to path follows these rules:
* - A simple theme name ('mytheme') which maps to the standard themes dir (/themes/mytheme)
* - A theme path with a leading slash ('/mymodule/themes/mytheme') which maps directly to that path.
* - or a vendored theme path. (vendor/mymodule:mytheme) which maps to the nested 'theme' within
* that module. ('/mymodule/themes/mytheme').
* - A vendored module with no nested theme (vendor/mymodule) which maps to the root directory
* of that module. ('/mymodule').
*
* @param string $identifier Theme identifier.
* @return string Path from root, not including leading or trailing forward slash. E.g. themes/mytheme
*/
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public function getPath($identifier) {
$slashPos = strpos($identifier, '/');
// If identifier starts with "/", it's a path from root
if ($slashPos === 0) {
return substr($identifier, 1);
}
// Otherwise if there is a "/", identifier is a vendor'ed module
elseif ($slashPos !== false) {
// Extract from <vendor>/<module>:<theme> format.
// <vendor> is optional, and if <theme> is omitted it defaults to the module root dir.
// If <theme> is included, this is the name of the directory under moduleroot/themes/
// which contains the theme.
// <module> is always the name of the install directory, not necessarily the composer name.
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$parts = explode(':', $identifier, 2);
list($vendor, $module) = explode('/', $parts[0], 2);
$theme = count($parts) > 1 ? $parts[1] : '';
$path = $module . ($theme ? '/themes/'.$theme : '');
// Right now we require $module to be a silverstripe module (in root) or theme (in themes dir)
// If both exist, we prefer theme
if (is_dir(THEMES_PATH . '/' .$path)) {
return THEMES_DIR . '/' . $path;
}
else {
return $path;
}
}
// Otherwise it's a (deprecated) old-style "theme" identifier
else {
return THEMES_DIR.'/'.$identifier;
}
}
/**
* Attempts to find possible candidate templates from a set of template
* names from modules, current theme directory and finally the application
* folder.
*
* The template names can be passed in as plain strings, or be in the
* format "type/name", where type is the type of template to search for
* (e.g. Includes, Layout).
*
* @param string|array $template Template name, or template spec in array format with the keys
* 'type' (type string) and 'templates' (template hierarchy in order of precedence).
* If 'templates' is ommitted then any other item in the array will be treated as the template
* list.
* Templates with an .ss extension will be treated as file paths, and will bypass
* theme-coupled resolution.
* @param array $themes List of themes to use to resolve themes. In most cases
* you should pass in {@see SSViewer::get_themes()}
* @return string Absolute path to resolved template file, or null if not resolved.
* File location will be in the format themes/<theme>/templates/<directories>/<type>/<basename>.ss
* Note that type (e.g. 'Layout') is not the root level directory under 'templates'.
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*/
public function findTemplate($template, $themes) {
$type = '';
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if(is_array($template)) {
// Check if templates has type specified
if (array_key_exists('type', $template)) {
$type = $template['type'];
unset($template['type']);
}
// Templates are either nested in 'templates' or just the rest of the list
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$templateList = array_key_exists('templates', $template) ? $template['templates'] : $template;
} else {
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$templateList = array($template);
}
// If we have an .ss extension, this is a path, not a template name. We should
// pass in templates without extensions in order for template manifest to find
// files dynamically.
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if(count($templateList) == 1 && substr($templateList[0], -3) == '.ss') {
return $templateList[0];
}
foreach($templateList as $i => $template) {
$template = str_replace('\\', '/', $template);
$parts = explode('/', $template);
$tail = array_pop($parts);
$head = implode('/', $parts);
$themePaths = $this->getThemePaths($themes);
foreach($themePaths as $themePath) {
// Join path
$pathParts = [ $this->base, $themePath, 'templates', $head, $type, $tail ];
$path = implode('/', array_filter($pathParts)) . '.ss';
if (file_exists($path)) {
return $path;
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}
}
}
// No template found
return null;
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}
/**
* Resolve themed CSS path
*
* @param string $name Name of CSS file without extension
* @param array $themes List of themes
* @return string Path to resolved CSS file (relative to base dir)
*/
public function findThemedCSS($name, $themes)
{
$css = "/css/$name.css";
$paths = $this->getThemePaths($themes);
foreach ($paths as $themePath) {
$abspath = $this->base . '/' . $themePath;
if (file_exists($abspath . $css)) {
return $themePath . $css;
}
}
// CSS exists in no context
return null;
}
/**
* Registers the given themeable javascript as required.
*
* A javascript file in the current theme path name 'themename/javascript/$name.js' is first searched for,
* and it that doesn't exist and the module parameter is set then a javascript file with that name in
* the module is used.
*
* @param string $name The name of the file - eg '/js/File.js' would have the name 'File'
* @param array $themes List of themes
* @return string Path to resolved javascript file (relative to base dir)
*/
public function findThemedJavascript($name, $themes) {
$js = "/javascript/$name.js";
$paths = $this->getThemePaths($themes);
foreach ($paths as $themePath) {
$abspath = $this->base . '/' . $themePath;
if (file_exists($abspath . $js)) {
return $themePath . $js;
}
}
// js exists in no context
return null;
}
/**
* Resolve all themes to the list of root folders relative to site root
*
* @param array $themes List of themes to resolve. Supports named theme sets.
* @return array List of root-relative folders in order of precendence.
*/
public function getThemePaths($themes) {
$paths = [];
foreach($themes as $themename) {
// Expand theme sets
$set = $this->getSet($themename);
$subthemes = $set ? $set->getThemes() : [$themename];
// Resolve paths
foreach ($subthemes as $theme) {
$paths[] = $this->getPath($theme);
}
}
return $paths;
}
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}