views_plugin_localization.inc

<?php


/**
 * @file
 * Contains the base class for views localization plugins.
 */

/**
 * The base plugin to handle localization of Views strings.
 *
 * @ingroup views_localization_plugins
 */
class views_plugin_localization extends views_plugin {
    // Store for exported strings
    var $export_strings = array();
    var $translate = TRUE;
    
    /**
     * Initialize the plugin.
     *
     * @param $view
     *   The view object.
     */
    function init(&$view) {
        $this->view =& $view;
    }
    
    /**
     * Translate a string / text with format
     *
     * The $source parameter is an array with the following elements:
     * - value, source string
     * - format, input format in case the text has some format to be applied
     * - keys. An array of keys to identify the string. Generally constructed from
     *   view name, display_id, and a property, e.g., 'header'.
     *
     * @param $source
     *   Full data for the string to be translated.
     *
     * @return string
     *   Translated string / text
     */
    function translate($source) {
        // Allow other modules to make changes to the string before and after translation
        $source['pre_process'] = $this->invoke_translation_process($source, 'pre');
        $source['translation'] = $this->translate_string($source['value'], $source['keys'], $source['format']);
        $source['post_process'] = $this->invoke_translation_process($source, 'post');
        return $source['translation'];
    }
    
    /**
     * Translate a string.
     *
     * @param $string
     *   The string to be translated.
     * @param $keys
     *   An array of keys to identify the string. Generally constructed from
     *   view name, display_id, and a property, e.g., 'header'.
     * @param $format
     *   The input format of the string. This is optional.
     */
    function translate_string($string, $keys = array(), $format = '') {
    }
    
    /**
     * Save string source for translation.
     *
     * @param $source
     *   Full data for the string to be translated.
     */
    function save($source) {
        // Allow other modules to make changes to the string before saving
        $source['pre_process'] = $this->invoke_translation_process($source, 'pre');
        $this->save_string($source['value'], $source['keys'], isset($source['format']) ? $source['format'] : '');
    }
    
    /**
     * Save a string for translation
     *
     * @param $string
     *   The string to be translated.
     * @param $keys
     *   An array of keys to identify the string. Generally constructed from
     *   view name, display_id, and a property, e.g., 'header'.
     * @param $format
     *   The input format of the string. This is optional.
     */
    function save_string($string, $keys = array(), $format = '') {
    }
    
    /**
     * Delete a string.
     *
     * @param $source
     *   Full data for the string to be translated.
     */
    function delete($source) {
    }
    
    /**
     * Collect strings to be exported to code.
     *
     * @param $source
     *   Full data for the string to be translated.
     */
    function export($source) {
    }
    
    /**
     * Render any collected exported strings to code.
     *
     * @param $indent
     *   An optional indentation for prettifying nested code.
     */
    function export_render($indent = '  ') {
    }
    
    /**
     * Invoke hook_translation_pre_process() or hook_translation_post_process().
     *
     * Like node_invoke_nodeapi(), this function is needed to enable both passing
     * by reference and fetching return values.
     */
    function invoke_translation_process(&$value, $op) {
        $return = array();
        $hook = 'translation_' . $op . '_process';
        foreach (module_implements($hook) as $module) {
            $function = $module . '_' . $hook;
            $result = $function($value);
            if (isset($result)) {
                $return[$module] = $result;
            }
        }
        return $return;
    }
    function process_locale_strings($op) {
        $this->view
            ->init_display();
        foreach ($this->view->display as $display_id => $display) {
            $translatable = array();
            // Special handling for display title.
            if (isset($display->display_title)) {
                $translatable[] = array(
                    'value' => $display->display_title,
                    'keys' => array(
                        'display_title',
                    ),
                );
            }
            // Unpack handlers.
            if (is_object($this->view->display[$display_id]->handler)) {
                $this->view->display[$display_id]->handler
                    ->unpack_translatables($translatable);
            }
            foreach ($translatable as $data) {
                $data['keys'] = array_merge(array(
                    $this->view->name,
                    $display_id,
                ), $data['keys']);
                switch ($op) {
                    case 'save':
                        $this->save($data);
                        break;
                    case 'delete':
                        $this->delete($data);
                        break;
                    case 'export':
                        $this->export($data);
                        break;
                }
            }
        }
    }

}