/
viewfield.module
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/
viewfield.module
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<?php
/**
* @file
* Defines a field type to display a view.
*/
/**
* Implements hook_theme().
*/
function viewfield_theme() {
return array(
'viewfield_formatter_default' => array(
'render element' => 'element',
),
);
}
/**
* Implements hook_field_info().
*/
function viewfield_field_info() {
return array(
'viewfield' => array(
// Should be "View", but that would translate into "view" (show) for many
// languages due to missing string translation contexts.
'label' => t('Views'),
'description' => t('Displays a selected view in a node.'),
'instance_settings' => array(
'force_default' => FALSE,
'allowed_views' => array(),
),
'default_widget' => 'viewfield_select',
'default_formatter' => 'viewfield_default',
),
);
}
/**
* Implements hook_field_instance_settings_form().
*
* @see viewfield_field_instance_settings_form_validate()
*/
function viewfield_field_instance_settings_form($field, $instance) {
$form['#field_name'] = $field['field_name'];
$form['force_default'] = array(
'#type' => 'checkbox',
'#title' => t('Always use default value'),
'#default_value' => $instance['settings']['force_default'],
'#description' => t('Hides this field in forms and enforces the configured default value.'),
);
$form['allowed_views'] = array(
'#type' => 'checkboxes',
'#title' => t('Allowed values'),
'#options' => backdrop_map_assoc(array_keys(views_get_enabled_views())),
'#default_value' => isset($instance['settings']['allowed_views']) && is_array($instance['settings']['allowed_views']) ? $instance['settings']['allowed_views'] : array(),
'#description' => t('Only selected views will be available for content authors. Leave empty to allow all.'),
);
$form['#element_validate'] = array('viewfield_field_instance_settings_form_validate');
return $form;
}
/**
* Form element validation handler for viewfield_field_instance_settings_form().
*/
function viewfield_field_instance_settings_form_validate($element, &$form_state) {
$widget_values = $form_state['values'][$element['#field_name']][LANGUAGE_NONE];
if ($element['force_default']['#value']) {
if (empty($widget_values[0]['vname'])) {
form_error($element['force_default'], t('%title requires a default value.', array(
'%title' => $element['force_default']['#title'],
)));
}
}
}
/**
* Implements hook_field_presave().
*/
function viewfield_field_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {
foreach ($items as $delta => $item) {
if (empty($item['vname'])) {
unset($items[$delta]);
}
}
}
/**
* Implements hook_field_is_empty().
*/
function viewfield_field_is_empty($item, $field) {
return empty($item['vname']);
}
/**
* Implements hook_field_prepare_view().
*
* Replace field values with instance defaults when force_default is set.
*/
function viewfield_field_prepare_view($entity_type, $entities, $field, $instances, $langcode, &$items) {
foreach ($items as $entity_id => &$instance_items) {
if ($instances[$entity_id]['settings']['force_default']) {
$instance_items = $instances[$entity_id]['default_value'];
}
}
}
/**
* Implements hook_field_formatter_info().
*/
function viewfield_field_formatter_info() {
return array(
'viewfield_default' => array(
'label' => t('Default'),
'field types' => array('viewfield'),
),
);
}
/**
* Implements hook_field_formatter_view().
*/
function viewfield_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
list($entity_id) = entity_extract_ids($entity_type, $entity);
$elements = array();
switch ($display['type']) {
case 'viewfield_default':
foreach ($items as $delta => $item) {
// @todo Store name and display separately.
list($view_name, $view_display) = explode('|', $item['vname'], 2);
$view = views_get_view($view_name);
$elements[$delta] = array(
'#type' => 'viewfield',
'#access' => $view && $view->access($view_display),
'#view' => $view,
'#view_name' => $view_name,
'#view_display' => $view_display,
'#view_arguments' => $item['vargs'],
'#entity_type' => $entity_type,
'#entity_id' => $entity_id,
'#entity' => $entity,
);
}
break;
}
return $elements;
}
/**
* Implements hook_element_info().
*/
function viewfield_element_info() {
$types['viewfield'] = array(
'#pre_render' => array('viewfield_pre_render'),
'#theme' => 'viewfield_formatter_default',
'#post_render' => array('viewfield_post_render'),
);
return $types;
}
/**
* #pre_render callback for a viewfield field.
*
* @see viewfield_field_formatter_view()
* @see viewfield_post_render()
*/
function viewfield_pre_render($element) {
$stack = &backdrop_static('viewfield_stack', array());
// Abort rendering in case the view could not be loaded.
if (empty($element['#view'])) {
// @todo Output an error message?
$element['#printed'] = TRUE;
}
// Abort rendering in case of recursion.
elseif (isset($stack[$element['#entity_type']][$element['#entity_id']])) {
$element['#printed'] = TRUE;
}
// Otherwise, add the rendered entity to the stack to prevent recursion.
else {
$stack[$element['#entity_type']][$element['#entity_id']] = TRUE;
// Override the view's path to the current path. Otherwise, exposed
// views filters would submit to the front page.
$element['#view']->override_path = current_path();
// @todo Store views arguments serialized.
$element['#view_arguments'] = _viewfield_get_view_args($element['#view_arguments'], $element['#entity_type'], $element['#entity']);
}
return $element;
}
/**
* #post_render callback for a viewfield field.
*
* @see viewfield_pre_render()
* @see viewfield_field_formatter_view()
*/
function viewfield_post_render($content, $element) {
$stack = &backdrop_static('viewfield_stack', array());
unset($stack[$element['#entity_type']][$element['#entity_id']]);
return $content;
}
/**
* Return HTML for a view in a field.
*
* @see views_embed_view()
*/
function theme_viewfield_formatter_default($variables) {
$element = $variables['element'];
return $element['#view']->preview($element['#view_display'], $element['#view_arguments']);
}
/**
* Implements hook_field_widget_info().
*/
function viewfield_field_widget_info() {
return array(
'viewfield_select' => array(
'label' => 'Select List',
'field types' => array('viewfield'),
),
);
}
/**
* Implements hook_field_widget_form().
*/
function viewfield_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {
// Administrators need to be able to re-configure the default value on the
// field edit form if 'force_default' is enabled.
// @todo Core: Provide a solid identifier in field_ui_default_value_widget().
$is_field_settings_form = FALSE;
if (isset($form['#type']) && $form['#type'] == 'fieldset') {
$is_field_settings_form = TRUE;
$instance['settings']['force_default'] = FALSE;
}
// Display the form to let the user pick a view.
$options = _viewfield_potential_references($field, $instance);
$element['vname'] = array(
'#type' => 'select',
'#title' => $element['#title'],
'#options' => $options,
'#required' => $element['#required'],
'#empty_value' => 0,
'#default_value' => isset($items[$delta]['vname']) ? $items[$delta]['vname'] : NULL,
'#access' => !$instance['settings']['force_default'],
'#description' => $element['#description'],
);
$element['vargs'] = array(
'#type' => 'textfield',
'#title' => t('Arguments'),
'#default_value' => isset($items[$delta]['vargs']) ? $items[$delta]['vargs'] : NULL,
'#access' => !$instance['settings']['force_default'],
'#description' => t('A comma separated list of arguments to pass to the selected view. '),
);
// Provide token help.
if (module_exists('token')) {
$element['vargs']['#description'] .= t('Any token from the placeholder token list may be used as an argument.');
// Only show token help for first value or in field settings form.
if ($element['#delta'] === 0 && !$instance['settings']['force_default']) {
$element['token_help'] = array(
'#type' => 'fieldset',
'#title' => t('Placeholder tokens'),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
);
$element['token_help']['tokens'] = array(
'#theme' => 'token_tree',
'#token_types' => array($element['#entity_type']),
'#global_types' => TRUE,
'#dialog' => TRUE,
);
}
}
else {
$element['vargs']['#description'] .= t('Enable the %token module to see a complete list of tokens that may be used as arguments.', array('%token' => t('Token')));
}
$element['vargs']['#description'] .= t(' (Wrap arguments containing commas in double quotes and replace double quotes in arguments with a pair of double quotes.)');
// @todo Core: Fix bogus white-space: nowrap.
// @see http://drupal.org/node/1230336
$element['#attached']['css'] = array(
backdrop_get_path('module', 'viewfield') . '/viewfield.css' => array(
'weight' => 1,
),
);
return $element;
}
/**
* Returns a select options list of views displays of enabled and allowed views.
*/
function _viewfield_potential_references($field, $instance) {
// Retrieve all currently available views.
$views = views_get_enabled_views();
// Limit to allowed values, if any.
if (isset($instance['settings']['allowed_views']) && is_array($instance['settings']['allowed_views'])) {
// Only intersect if at least one view has been enabled; otherwise, we would
// end up with empty $views.
if ($allowed = array_filter($instance['settings']['allowed_views'])) {
$views = array_intersect_key($views, $allowed);
}
}
$options = array();
foreach ($views as $view_name => $view) {
foreach ($view->display as $display) {
$options[$view->name . '|' . $display->id] = $view->name . ' - ' . $display->display_title;
}
}
return $options;
}
/**
* Perform argument replacement
*/
function _viewfield_get_view_args($vargs, $entity_type, $entity) {
$args = array();
if (!empty($vargs)) {
$pos = 0;
while ($pos < strlen($vargs)) {
$found = FALSE;
// If string starts with a quote, start after quote and get everything
// before next quote.
if (strpos($vargs, '"', $pos) === $pos) {
if (($quote = strpos($vargs, '"', ++$pos)) !== FALSE) {
// Skip pairs of quotes.
while (!(($ql = strspn($vargs, '"', $quote)) & 1)) {
$quote = strpos($vargs, '"', $quote + $ql);
}
$args[] = str_replace('""', '"', substr($vargs, $pos, $quote + $ql - $pos - 1));
$pos = $quote + $ql + 1;
$found = TRUE;
}
}
elseif (($comma = strpos($vargs, ',', $pos)) !== FALSE) {
// Otherwise, get everything before next comma.
$args[] = substr($vargs, $pos, $comma - $pos);
// Skip to after comma and repeat
$pos = $comma + 1;
$found = TRUE;
}
if (!$found) {
$args[] = substr($vargs, $pos);
$pos = strlen($vargs);
}
}
list($entity_id) = entity_extract_ids($entity_type, $entity);
$entities = entity_load($entity_type, array($entity_id));
$token_data = array($entity_type => $entities[$entity_id]);
foreach ($args as $key => $value) {
$args[$key] = token_replace($value, $token_data);
}
}
return $args;
}
/**
* Implements hook_content_migrate_field_alter().
*/
function viewfield_content_migrate_field_alter(&$field_value, $instance_value) {
switch ($field_value['type']) {
case 'viewfield':
// allowed_views is now an instance setting.
unset($field_value['settings']['allowed_views']);
break;
}
}
/**
* Implements hook_content_migrate_instance_alter().
*/
function viewfield_content_migrate_instance_alter(&$instance_value, $field_value) {
switch ($field_value['type']) {
case 'viewfield':
// Change formatter names to be prefixed with 'viewfield_'.
foreach ($instance_value['display'] as $context => $settings) {
if (strpos('viewfield_', $settings['type']) !== 0) {
$instance_value['display'][$context]['type'] = 'viewfield_' . $settings['type'];
}
}
// Migrate legacy tokens in CCK fields to core tokens in D7 fields.
if (!empty($instance_value['default_value'])) {
foreach ($instance_value['default_value'] as $key => $default) {
if (!empty($default['vargs'])) {
$instance_value['default_value'][$key]['vargs'] = _viewfield_migrate_legacy_tokens($default['vargs']);
}
}
}
// Migrate force_default from widget to instance settings.
// @see viewfield_update_7200()
if (isset($instance_value['widget']['settings']['force_default'])) {
$instance_value['settings']['force_default'] = $instance_value['widget']['settings']['force_default'];
unset($instance_value['widget']['settings']['force_default']);
}
// Migrate allowed_views from field to instance settings.
// @see viewfield_update_7201()
if (isset($field_value['settings']['allowed_views'])) {
$instance_value['settings']['allowed_views'] = $field_value['settings']['allowed_views'];
}
break;
}
}
/**
* Implements hook_content_migrate_data_record_alter().
*/
function viewfield_content_migrate_data_record_alter(&$record, $field) {
switch ($field['type']) {
case 'viewfield':
// Migrate legacy tokens in CCK fields to core tokens in D7 fields.
$vargs_field_name = $field['field_name'] . '_vargs';
if (!empty($record[$vargs_field_name])) {
$record[$vargs_field_name] = _viewfield_migrate_legacy_tokens($record[$vargs_field_name]);
}
break;
}
}
/**
* Substitute core tokens for legacy tokens (%nid, %author, %viewer) in text.
*/
function _viewfield_migrate_legacy_tokens($text) {
return strtr($text, array(
'%nid' => '[node:nid]',
'%author' => '[node:author]',
'%viewer' => '[current-user:uid]',
));
}