_theme_process_registry
function _theme_process_registry
_theme_process_registry(&$cache, $name, $type, $theme, $path)
Process a single implementation of hook_theme().
Parameters
$cache: The theme registry that will eventually be cached; It is an associative array keyed by theme hooks, whose values are associative arrays describing the hook:
- 'type': The passed-in $type.
- 'theme path': The passed-in $path.
- 'function': The name of the function generating output for this theme hook. Either defined explicitly in hook_theme() or, if neither 'function' nor 'template' is defined, then the default theme function name is used. The default theme function name is the theme hook prefixed by either 'theme_' for modules or '$name_' for everything else. If 'function' is defined, 'template' is not used.
- 'template': The filename of the template generating output for this theme hook. The template is in the directory defined by the 'path' key of hook_theme() or defaults to $path.
- 'variables': The variables for this theme hook as defined in hook_theme(). If there is more than one implementation and 'variables' is not specified in a later one, then the previous definition is kept.
- 'render element': The renderable element for this theme hook as defined in hook_theme(). If there is more than one implementation and 'render element' is not specified in a later one, then the previous definition is kept.
- 'preprocess functions': See theme() for detailed documentation.
- 'process functions': See theme() for detailed documentation.
$name: The name of the module, theme engine, base theme engine, theme or base theme implementing hook_theme().
$type: One of 'module', 'theme_engine', 'base_theme_engine', 'theme', or 'base_theme'. Unlike regular hooks that can only be implemented by modules, each of these can implement hook_theme(). _theme_process_registry() is called in aforementioned order and new entries override older ones. For example, if a theme hook is both defined by a module and a theme, then the definition in the theme will be used.
$theme: The loaded $theme object as returned from list_themes().
$path: The directory where $name is. For example, modules/system or themes/bartik.
See also
theme()
File
- includes/theme.inc, line 515
- The theme system, which controls the output of Drupal.
Code
function _theme_process_registry(&$cache, $name, $type, $theme, $path) { $result = array(); // Processor functions work in two distinct phases with the process // functions always being executed after the preprocess functions. $variable_process_phases = array( 'preprocess functions' => 'preprocess', 'process functions' => 'process', ); $hook_defaults = array( 'variables' => TRUE, 'render element' => TRUE, 'pattern' => TRUE, 'base hook' => TRUE, ); // Invoke the hook_theme() implementation, process what is returned, and // merge it into $cache. $function = $name . '_theme'; if (function_exists($function)) { $result = $function($cache, $type, $theme, $path); foreach ($result as $hook => $info) { // When a theme or engine overrides a module's theme function // $result[$hook] will only contain key/value pairs for information being // overridden. Pull the rest of the information from what was defined by // an earlier hook. // Fill in the type and path of the module, theme, or engine that // implements this theme function. $result[$hook]['type'] = $type; $result[$hook]['theme path'] = $path; // If function and file are omitted, default to standard naming // conventions. if (!isset($info['template']) && !isset($info['function'])) { $result[$hook]['function'] = ($type == 'module' ? 'theme_' : $name . '_') . $hook; } if (isset($cache[$hook]['includes'])) { $result[$hook]['includes'] = $cache[$hook]['includes']; } // If the theme implementation defines a file, then also use the path // that it defined. Otherwise use the default path. This allows // system.module to declare theme functions on behalf of core .include // files. if (isset($info['file'])) { $include_file = isset($info['path']) ? $info['path'] : $path; $include_file .= '/' . $info['file']; include_once DRUPAL_ROOT . '/' . $include_file; $result[$hook]['includes'][] = $include_file; } // If the default keys are not set, use the default values registered // by the module. if (isset($cache[$hook])) { $result[$hook] += array_intersect_key($cache[$hook], $hook_defaults); } // The following apply only to theming hooks implemented as templates. if (isset($info['template'])) { // Prepend the current theming path when none is set. if (!isset($info['path'])) { $result[$hook]['template'] = $path . '/' . $info['template']; } } // Allow variable processors for all theming hooks, whether the hook is // implemented as a template or as a function. foreach ($variable_process_phases as $phase_key => $phase) { // Check for existing variable processors. Ensure arrayness. if (!isset($info[$phase_key]) || !is_array($info[$phase_key])) { $info[$phase_key] = array(); $prefixes = array(); if ($type == 'module') { // Default variable processor prefix. $prefixes[] = 'template'; // Add all modules so they can intervene with their own variable // processors. This allows them to provide variable processors even // if they are not the owner of the current hook. $prefixes += module_list(); } elseif ($type == 'theme_engine' || $type == 'base_theme_engine') { // Theme engines get an extra set that come before the normally // named variable processors. $prefixes[] = $name . '_engine'; // The theme engine registers on behalf of the theme using the // theme's name. $prefixes[] = $theme; } else { // This applies when the theme manually registers their own variable // processors. $prefixes[] = $name; } foreach ($prefixes as $prefix) { // Only use non-hook-specific variable processors for theming hooks // implemented as templates. See theme(). if (isset($info['template']) && function_exists($prefix . '_' . $phase)) { $info[$phase_key][] = $prefix . '_' . $phase; } if (function_exists($prefix . '_' . $phase . '_' . $hook)) { $info[$phase_key][] = $prefix . '_' . $phase . '_' . $hook; } } } // Check for the override flag and prevent the cached variable // processors from being used. This allows themes or theme engines to // remove variable processors set earlier in the registry build. if (!empty($info['override ' . $phase_key])) { // Flag not needed inside the registry. unset($result[$hook]['override ' . $phase_key]); } elseif (isset($cache[$hook][$phase_key]) && is_array($cache[$hook][$phase_key])) { $info[$phase_key] = array_merge($cache[$hook][$phase_key], $info[$phase_key]); } $result[$hook][$phase_key] = $info[$phase_key]; } } // Merge the newly created theme hooks into the existing cache. $cache = $result + $cache; } // Let themes have variable processors even if they didn't register a // template. if ($type == 'theme' || $type == 'base_theme') { foreach ($cache as $hook => $info) { // Check only if not registered by the theme or engine. if (empty($result[$hook])) { foreach ($variable_process_phases as $phase_key => $phase) { if (!isset($info[$phase_key])) { $cache[$hook][$phase_key] = array(); } // Only use non-hook-specific variable processors for theming hooks // implemented as templates. See theme(). if (isset($info['template']) && function_exists($name . '_' . $phase)) { $cache[$hook][$phase_key][] = $name . '_' . $phase; } if (function_exists($name . '_' . $phase . '_' . $hook)) { $cache[$hook][$phase_key][] = $name . '_' . $phase . '_' . $hook; $cache[$hook]['theme path'] = $path; } // Ensure uniqueness. $cache[$hook][$phase_key] = array_unique($cache[$hook][$phase_key]); } } } } }
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https://api.drupal.org/api/drupal/includes!theme.inc/function/_theme_process_registry/7.x