drupal_find_theme_functions($cache, $prefixes)
Allows themes and/or theme engines to discover overridden theme functions.
Parameters
array $cache: The existing cache of theme hooks to test against.
array $prefixes: An array of prefixes to test, in reverse order of importance.
Return value
array The functions found, suitable for returning from hook_theme;
File
- core/includes/theme.inc, line 135
- The theme system, which controls the output of Drupal.
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | function drupal_find_theme_functions($cache, $prefixes) { $implementations = []; $grouped_functions = \Drupal::service('theme.registry')->getPrefixGroupedUserFunctions(); foreach ($cache as $hook => $info) { foreach ($prefixes as $prefix) { // Find theme functions that implement possible "suggestion" variants of // registered theme hooks and add those as new registered theme hooks. // The 'pattern' key defines a common prefix that all suggestions must // start with. The default is the name of the hook followed by '__'. An // 'base hook' key is added to each entry made for a found suggestion, // so that common functionality can be implemented for all suggestions of // the same base hook. To keep things simple, deep hierarchy of // suggestions is not supported: each suggestion's 'base hook' key // refers to a base hook, not to another suggestion, and all suggestions // are found using the base hook's pattern, not a pattern from an // intermediary suggestion. $pattern = isset($info['pattern']) ? $info['pattern'] : ($hook . '__'); // Grep only the functions which are within the prefix group. list($first_prefix, ) = explode('_', $prefix, 2); if (!isset($info['base hook']) && !empty($pattern) && isset($grouped_functions[$first_prefix])) { $matches = preg_grep('/^' . $prefix . '_' . $pattern . '/', $grouped_functions[$first_prefix]); if ($matches) { foreach ($matches as $match) { $new_hook = substr($match, strlen($prefix) + 1); $arg_name = isset($info['variables']) ? 'variables' : 'render element'; $implementations[$new_hook] = array( 'function' => $match, $arg_name => $info[$arg_name], 'base hook' => $hook, ); } } } // Find theme functions that implement registered theme hooks and include // that in what is returned so that the registry knows that the theme has // this implementation. if (function_exists($prefix . '_' . $hook)) { $implementations[$hook] = array( 'function' => $prefix . '_' . $hook, ); } } } return $implementations;} |
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