class views_object

class views_object {
    
    /**
     * Except for displays, options for the object will be held here.
     */
    public $options = array();
    
    /**
     * The top object of a view.
     *
     * @var view
     */
    public $view = NULL;
    
    /**
     * Handler's definition.
     *
     * @var array
     */
    public $definition;
    
    /**
     * Information about options for all kinds of purposes will be held here.
     *
     * @code
     * 'option_name' => array(
     *  - 'default' => default value,
     *  - 'translatable' => (optional) TRUE/FALSE (wrap in t() on export if true),
     *  - 'contains' => (optional) array of items this contains, with its own
     *      defaults, etc. If contains is set, the default will be ignored and
     *      assumed to be array().
     *  - 'bool' => (optional) TRUE/FALSE Is the value a boolean value. This will
     *      change the export format to TRUE/FALSE instead of 1/0.
     *  - 'export' => (optional) FALSE or a callback for special export handling
     *      if necessary.
     *  - 'unpack_translatable' => (optional) callback for special handling for
     *      translating data within the option, if necessary.
     *  ),
     * @endcode
     *
     * @return array
     *   Returns the options of this handler/plugin.
     *
     * @see views_object::export_option()
     * @see views_object::export_option_always()
     * @see views_object::unpack_translatable()
     */
    public function option_definition() {
        return array();
    }
    
    /**
     * Collect this handler's option definition and alter them, ready for use.
     *
     * @return array
     *   Returns the options of this handler/plugin after allowing for alters.
     *
     * @see hook_views_plugin_option_definition_alter()
     * @see hook_views_handler_option_definition_alter()
     */
    public function altered_option_definition() {
        $definition = $this->option_definition();
        if (!empty($this->is_plugin)) {
            // Trigger hook_views_plugin_option_definition_alter().
            drupal_alter('views_plugin_option_definition', $definition, $this);
        }
        else {
            // Trigger hook_views_handler_option_definition_alter().
            drupal_alter('views_handler_option_definition', $definition, $this);
        }
        return $definition;
    }
    
    /**
     * Views handlers use a special construct function.
     *
     * Allows it to more easily construct them with variable arguments.
     */
    public function construct() {
        $this->set_default_options();
    }
    
    /**
     * Set default options on this object.
     *
     * Called by the constructor in a complex chain to deal with backward
     * compatibility.
     *
     * @deprecated since views2
     */
    public function options(&$options) {
    }
    
    /**
     * Set default options.
     *
     * For backward compatibility, it sends the options array; this is a feature
     * that will likely disappear at some point.
     */
    public function set_default_options() {
        $this->_set_option_defaults($this->options, $this->altered_option_definition());
        // Retained for complex defaults plus backward compatibility.
        $this->options($this->options);
    }
    
    /**
     *
     */
    public function _set_option_defaults(&$storage, $options, $level = 0) {
        foreach ($options as $option => $definition) {
            if (isset($definition['contains']) && is_array($definition['contains'])) {
                $storage[$option] = array();
                $this->_set_option_defaults($storage[$option], $definition['contains'], $level++);
            }
            elseif (!empty($definition['translatable']) && !empty($definition['default'])) {
                $storage[$option] = t($definition['default']);
            }
            else {
                $storage[$option] = isset($definition['default']) ? $definition['default'] : NULL;
            }
        }
    }
    
    /**
     * Unpack options over our existing defaults, drilling down into arrays so
     * that defaults don't get totally blown away.
     */
    public function unpack_options(&$storage, $options, $definition = NULL, $all = TRUE, $check = TRUE, $localization_keys = array()) {
        if ($check && !is_array($options)) {
            return;
        }
        if (!isset($definition)) {
            $definition = $this->altered_option_definition();
        }
        if (!empty($this->view)) {
            // Ensure we have a localization plugin.
            $this->view
                ->init_localization();
            // Set up default localization keys. Handlers and such set this for us.
            if (empty($localization_keys) && isset($this->localization_keys)) {
                $localization_keys = $this->localization_keys;
            }
            elseif (!empty($this->is_plugin) && empty($localization_keys)) {
                if ($this->plugin_type != 'display') {
                    $localization_keys = array(
                        $this->view->current_display,
                    );
                    $localization_keys[] = $this->plugin_type;
                }
            }
        }
        foreach ($options as $key => $value) {
            if (is_array($value)) {
                // Ignore arrays with no definition.
                if (!$all && empty($definition[$key])) {
                    continue;
                }
                if (!isset($storage[$key]) || !is_array($storage[$key])) {
                    $storage[$key] = array();
                }
                // If we're just unpacking our known options, and we're dropping an
                // unknown array (as might happen for a dependent plugin fields) go
                // ahead and drop that in.
                if (!$all && isset($definition[$key]) && !isset($definition[$key]['contains'])) {
                    $storage[$key] = $value;
                    continue;
                }
                $this->unpack_options($storage[$key], $value, isset($definition[$key]['contains']) ? $definition[$key]['contains'] : array(), $all, FALSE, array_merge($localization_keys, array(
                    $key,
                )));
            }
            elseif (empty($this->view->editing) && !empty($definition[$key]['translatable']) && !empty($value) || !empty($definition['contains'][$key]['translatable']) && !empty($value)) {
                if (!empty($this->view) && $this->view
                    ->is_translatable()) {
                    // Allow other modules to make changes to the string before it's
                    // sent for translation.
                    // The $keys array is built from the view name, any localization keys
                    // sent in, and the name of the property being processed.
                    $format = NULL;
                    if (isset($definition[$key]['format_key']) && isset($options[$definition[$key]['format_key']])) {
                        $format = $options[$definition[$key]['format_key']];
                    }
                    $translation_data = array(
                        'value' => $value,
                        'format' => $format,
                        'keys' => array_merge(array(
                            $this->view->name,
                        ), $localization_keys, array(
                            $key,
                        )),
                    );
                    $storage[$key] = $this->view->localization_plugin
                        ->translate($translation_data);
                }
                else {
                    $storage[$key] = t($value);
                }
            }
            elseif ($all || !empty($definition[$key])) {
                $storage[$key] = $value;
            }
        }
    }
    
    /**
     * Let the handler know what its full definition is.
     */
    public function set_definition($definition) {
        $this->definition = $definition;
        if (isset($definition['field'])) {
            $this->real_field = $definition['field'];
        }
    }
    
    /**
     * Destructor.
     */
    public function destroy() {
        if (isset($this->view)) {
            unset($this->view);
        }
        if (isset($this->display)) {
            unset($this->display);
        }
        if (isset($this->query)) {
            unset($this->query);
        }
    }
    
    /**
     *
     */
    public function export_options($indent, $prefix) {
        $output = '';
        foreach ($this->altered_option_definition() as $option => $definition) {
            $output .= $this->export_option($indent, $prefix, $this->options, $option, $definition, array());
        }
        return $output;
    }
    
    /**
     *
     */
    public function export_option($indent, $prefix, $storage, $option, $definition, $parents) {
        // Do not export options for which we have no settings.
        if (!isset($storage[$option])) {
            return;
        }
        if (isset($definition['export'])) {
            if ($definition['export'] === FALSE) {
                return;
            }
            // Special handling for some items.
            if (method_exists($this, $definition['export'])) {
                return $this->{$definition['export']}($indent, $prefix, $storage, $option, $definition, $parents);
            }
        }
        // Add the current option to the parents tree.
        $parents[] = $option;
        $output = '';
        // If it has child items, export those separately.
        if (isset($definition['contains'])) {
            foreach ($definition['contains'] as $sub_option => $sub_definition) {
                $output .= $this->export_option($indent, $prefix, $storage[$option], $sub_option, $sub_definition, $parents);
            }
        }
        else {
            $default = isset($definition['default']) ? $definition['default'] : NULL;
            $value = $storage[$option];
            if (isset($definition['bool'])) {
                $value = (bool) $value;
            }
            if ($value !== $default) {
                $output .= $indent . $prefix . "['" . implode("']['", $parents) . "'] = ";
                if (isset($definition['bool'])) {
                    $output .= empty($storage[$option]) ? 'FALSE' : 'TRUE';
                }
                else {
                    $output .= views_var_export($storage[$option], $indent);
                }
                $output .= ";\n";
            }
        }
        return $output;
    }
    
    /**
     * Always exports the option, regardless of the default value.
     */
    public function export_option_always($indent, $prefix, $storage, $option, $definition, $parents) {
        // If there is no default, the option will always be exported.
        unset($definition['default']);
        // Unset our export method to prevent recursion.
        unset($definition['export']);
        return $this->export_option($indent, $prefix, $storage, $option, $definition, $parents);
    }
    
    /**
     * Unpacks each handler to store translatable texts.
     */
    public function unpack_translatables(&$translatable, $parents = array()) {
        foreach ($this->altered_option_definition() as $option => $definition) {
            $this->unpack_translatable($translatable, $this->options, $option, $definition, $parents, array());
        }
    }
    
    /**
     * Unpack a single option definition.
     *
     * This function run's through all suboptions recursive.
     *
     * @param array $translatable
     *   Stores all available translatable items.
     * @param array $storage
     * @param string $option
     * @param string $definition
     * @param array $parents
     * @param array $keys
     */
    public function unpack_translatable(&$translatable, $storage, $option, $definition, $parents, $keys = array()) {
        // Do not export options for which we have no settings.
        if (!isset($storage[$option])) {
            return;
        }
        // Special handling for some items.
        if (isset($definition['unpack_translatable']) && method_exists($this, $definition['unpack_translatable'])) {
            return $this->{$definition['unpack_translatable']}($translatable, $storage, $option, $definition, $parents, $keys);
        }
        if (isset($definition['translatable'])) {
            if ($definition['translatable'] === FALSE) {
                return;
            }
        }
        // Add the current option to the parents tree.
        $parents[] = $option;
        // If it has child items, unpack those separately.
        if (isset($definition['contains'])) {
            foreach ($definition['contains'] as $sub_option => $sub_definition) {
                $translation_keys = array_merge($keys, array(
                    $sub_option,
                ));
                $this->unpack_translatable($translatable, $storage[$option], $sub_option, $sub_definition, $parents, $translation_keys);
            }
        }
        // @todo Figure out this double definition stuff.
        $options = $storage[$option];
        if (is_array($options)) {
            foreach ($options as $key => $value) {
                $translation_keys = array_merge($keys, array(
                    $key,
                ));
                if (is_array($value)) {
                    $this->unpack_translatable($translatable, $options, $key, $definition, $parents, $translation_keys);
                }
                elseif (!empty($definition[$key]['translatable']) && !empty($value)) {
                    // Build source data and add to the array.
                    $format = NULL;
                    if (isset($definition['format_key']) && isset($options[$definition['format_key']])) {
                        $format = $options[$definition['format_key']];
                    }
                    $translatable[] = array(
                        'value' => $value,
                        'keys' => $translation_keys,
                        'format' => $format,
                    );
                }
            }
        }
        elseif (!empty($definition['translatable']) && !empty($options)) {
            $value = $options;
            // Build source data and add to the array.
            $format = NULL;
            if (isset($definition['format_key']) && isset($storage[$definition['format_key']])) {
                $format = $storage[$definition['format_key']];
            }
            $translatable[] = array(
                'value' => $value,
                'keys' => isset($translation_keys) ? $translation_keys : $parents,
                'format' => $format,
            );
        }
    }

}