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https://github.com/phpbb/phpbb.git
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292 lines
8.3 KiB
PHP
292 lines
8.3 KiB
PHP
<?php
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/**
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*
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* @package phpBB3
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* @copyright (c) 2011 phpBB Group
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* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
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*
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*/
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/**
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* @ignore
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*/
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if (!defined('IN_PHPBB'))
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{
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exit;
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}
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/**
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* Style resource locator.
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* Maintains mapping from template handles to source template file paths.
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* Locates style files: resources (such as .js and .css files) and templates.
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*
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* Style resource locator is aware of styles tree, and can return actual
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* filesystem paths (i.e., the "child" style or the "parent" styles)
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* depending on what files exist.
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*
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* Root paths stored in locator are paths to style directories. Templates are
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* stored in subdirectory that $template_path points to.
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*
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* @package phpBB3
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*/
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class phpbb_style_resource_locator implements phpbb_template_locator
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{
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/**
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* Paths to style directories.
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* @var array
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*/
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private $roots = array();
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/**
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* Location of templates directory within style directories.
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* Must have trailing slash. Empty if templates are stored in root
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* style directory, such as admin control panel templates.
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* @var string
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*/
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public $template_path = 'template/';
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/**
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* Map from root index to handles to source template file paths.
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* Normally it only contains paths for handles that are used
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* (or are likely to be used) by the page being rendered and not
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* all templates that exist on the filesystem.
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* @var array
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*/
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private $files = array();
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/**
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* Map from handles to source template file names.
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* Covers the same data as $files property but maps to basenames
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* instead of paths.
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* @var array
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*/
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private $filenames = array();
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/**
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* Sets the list of style paths
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*
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* These paths will be searched for style files in the provided order.
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* Paths may be outside of phpBB, but templates loaded from these paths
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* will still be cached.
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*
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* @param array $style_paths An array of paths to style directories
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* @return null
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*/
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public function set_paths($style_paths)
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{
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$this->roots = array();
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$this->files = array();
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$this->filenames = array();
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foreach ($style_paths as $key => $paths)
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{
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foreach ($paths as $path)
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{
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// Make sure $path has no ending slash
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if (substr($path, -1) === '/')
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{
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$path = substr($path, 0, -1);
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}
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$this->roots[$key][] = $path;
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}
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}
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}
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/**
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* Sets the template filenames for handles. $filename_array
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* should be a hash of handle => filename pairs.
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*
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* @param array $filname_array Should be a hash of handle => filename pairs.
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*/
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public function set_filenames(array $filename_array)
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{
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foreach ($filename_array as $handle => $filename)
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{
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if (empty($filename))
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{
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trigger_error("style resource locator: set_filenames: Empty filename specified for $handle", E_USER_ERROR);
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}
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$this->filename[$handle] = $filename;
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foreach ($this->roots as $root_key => $root_paths)
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{
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foreach ($root_paths as $root_index => $root)
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{
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$this->files[$root_key][$root_index][$handle] = $root . '/' . $this->template_path . $filename;
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}
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}
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}
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}
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/**
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* Determines the filename for a template handle.
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*
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* The filename comes from array used in a set_filenames call,
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* which should have been performed prior to invoking this function.
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* Return value is a file basename (without path).
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*
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* @param $handle string Template handle
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* @return string Filename corresponding to the template handle
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*/
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public function get_filename_for_handle($handle)
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{
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if (!isset($this->filename[$handle]))
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{
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trigger_error("style resource locator: get_filename_for_handle: No file specified for handle $handle", E_USER_ERROR);
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}
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return $this->filename[$handle];
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}
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/**
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* Determines the source file path for a template handle without
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* regard for styles tree.
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*
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* This function returns the path in "primary" style directory
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* corresponding to the given template handle. That path may or
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* may not actually exist on the filesystem. Because this function
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* does not perform stat calls to determine whether the path it
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* returns actually exists, it is faster than get_source_file_for_handle.
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*
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* Use get_source_file_for_handle to obtain the actual path that is
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* guaranteed to exist (which might come from the parent style
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* directory if primary style has parent styles).
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*
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* This function will trigger an error if the handle was never
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* associated with a template file via set_filenames.
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*
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* @param $handle string Template handle
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* @return string Path to source file path in primary style directory
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*/
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public function get_virtual_source_file_for_handle($handle)
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{
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// If we don't have a file assigned to this handle, die.
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if (!isset($this->files['style'][0][$handle]))
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{
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trigger_error("style resource locator: No file specified for handle $handle", E_USER_ERROR);
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}
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$source_file = $this->files['style'][0][$handle];
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return $source_file;
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}
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/**
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* Determines the source file path for a template handle, accounting
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* for styles tree and verifying that the path exists.
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*
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* This function returns the actual path that may be compiled for
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* the specified template handle. It will trigger an error if
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* the template handle was never associated with a template path
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* via set_filenames or if the template file does not exist on the
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* filesystem.
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*
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* Use get_virtual_source_file_for_handle to just resolve a template
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* handle to a path without any filesystem or styles tree checks.
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*
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* @param string $handle Template handle (i.e. "friendly" template name)
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* @param bool $find_all If true, each root path will be checked and function
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* will return array of files instead of string and will not
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* trigger a error if template does not exist
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* @return string Source file path
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*/
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public function get_source_file_for_handle($handle, $find_all = false)
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{
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// If we don't have a file assigned to this handle, die.
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if (!isset($this->files['style'][0][$handle]))
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{
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trigger_error("style resource locator: No file specified for handle $handle", E_USER_ERROR);
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}
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// locate a source file that exists
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$source_file = $this->files['style'][0][$handle];
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$tried = $source_file;
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$found = false;
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$found_all = array();
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foreach ($this->roots as $root_key => $root_paths)
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{
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foreach ($root_paths as $root_index => $root)
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{
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$source_file = $this->files[$root_key][$root_index][$handle];
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$tried .= ', ' . $source_file;
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if (file_exists($source_file))
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{
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$found = true;
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break;
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}
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}
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if ($found)
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{
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if ($find_all)
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{
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$found_all[] = $source_file;
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$found = false;
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}
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else
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{
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break;
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}
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}
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}
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// search failed
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if (!$found && !$find_all)
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{
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trigger_error("style resource locator: File for handle $handle does not exist. Could not find: $tried", E_USER_ERROR);
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}
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return ($find_all) ? $found_all : $source_file;
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}
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/**
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* Locates source file path, accounting for styles tree and verifying that
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* the path exists.
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*
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* Unlike previous functions, this function works without template handle
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* and it can search for more than one file. If more than one file name is
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* specified, it will return location of file that it finds first.
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*
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* @param array $files List of files to locate.
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* @param bool $return_default Determines what to return if file does not
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* exist. If true, function will return location where file is
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* supposed to be. If false, function will return false.
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* @param bool $return_full_path If true, function will return full path
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* to file. If false, function will return file name. This
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* parameter can be used to check which one of set of files
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* is available.
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* @return string or boolean Source file path if file exists or $return_default is
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* true. False if file does not exist and $return_default is false
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*/
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public function get_first_file_location($files, $return_default = false, $return_full_path = true)
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{
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// set default value
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$default_result = false;
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// check all available paths
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foreach ($this->roots as $root_paths)
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{
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foreach ($root_paths as $path)
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{
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// check all files
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foreach ($files as $filename)
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{
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$source_file = $path . '/' . $filename;
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if (file_exists($source_file))
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{
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return ($return_full_path) ? $source_file : $filename;
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}
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// assign first file as result if $return_default is true
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if ($return_default && $default_result === false)
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{
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$default_result = $source_file;
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}
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}
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}
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}
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// search failed
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return $default_result;
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}
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}
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