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<?php
define('LINK_EXTERNAL', 'external');
define('LINK_INTERNAL', 'internal');
define('LINK_FRONT', 'front');
define('LINK_EMAIL', 'email');
define('LINK_NEWS', 'news');
define('LINK_DOMAINS', 'aero|arpa|asia|biz|build|com|cat|ceo|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|post|pro|tel|travel|mobi|local|xxx');
define('LINK_TARGET_DEFAULT', 'default');
define('LINK_TARGET_NEW_WINDOW', '_blank');
define('LINK_TARGET_TOP', '_top');
define('LINK_TARGET_USER', 'user');
define('LINK_URL_MAX_LENGTH', 2048);
function link_field_info() {
return array(
'link' => array(
'label' => t('Link'),
'description' => t('Store a title, href, and attributes in the database to assemble a link.'),
),
);
}
function link_field_settings($op, $field) {
switch ($op) {
case 'form':
$form = array(
'#theme' => 'link_field_settings',
);
$form['validate_url'] = array(
'#type' => 'checkbox',
'#title' => t('Validate URL'),
'#default_value' => isset($field['validate_url']) && $field['validate_url'] !== '' ? $field['validate_url'] : TRUE,
'#description' => t('If checked, the URL field will be verified as a valid URL during validation.'),
);
$form['url'] = array(
'#type' => 'checkbox',
'#title' => t('Optional URL'),
'#default_value' => $field['url'],
'#return_value' => 'optional',
'#description' => t('If checked, the URL field is optional and submitting a title alone will be acceptable. If the URL is omitted, the title will be displayed as plain text.'),
);
$title_options = array(
'optional' => t('Optional Title'),
'required' => t('Required Title'),
'value' => t('Static Title: '),
'none' => t('No Title'),
);
$form['title'] = array(
'#type' => 'radios',
'#title' => t('Link Title'),
'#default_value' => isset($field['title']) && $field['title'] !== '' ? $field['title'] : 'optional',
'#options' => $title_options,
'#description' => t('If the link title is optional or required, a field will be displayed to the end user. If the link title is static, the link will always use the same title. If <a href="http://drupal.org/project/token">token module</a> is installed, the static title value may use any other node field as its value. Static and token-based titles may include most inline XHTML tags such as <em>strong</em>, <em>em</em>, <em>img</em>, <em>span</em>, etc.'),
);
$form['title_value'] = array(
'#type' => 'textfield',
'#default_value' => $field['title_value'],
'#size' => '46',
);
$form['title_value_visibility'] = array(
'#type' => 'checkbox',
'#title' => t('Hide title if URL is empty'),
'#default_value' => isset($field['title_value_visibility']) ? $field['title_value_visibility'] : 0,
'#description' => t('Checking will hide the title when a URL is empty, leave un-checked to always display the title.'),
);
if (module_exists('token')) {
$form['tokens'] = array(
'#type' => 'fieldset',
'#collapsible' => TRUE,
'#collapsed' => TRUE,
'#title' => t('Placeholder tokens'),
'#description' => t("The following placeholder tokens can be used in both paths and titles. When used in a path or title, they will be replaced with the appropriate values."),
);
$form['tokens']['help'] = array(
'#value' => theme('token_help', 'node'),
);
$form['enable_tokens'] = array(
'#type' => 'checkbox',
'#title' => t('Allow user-entered tokens'),
'#default_value' => isset($field['enable_tokens']) ? $field['enable_tokens'] : 1,
'#description' => t('Checking will allow users to enter tokens in URLs and Titles on the node edit form. This does not affect the field settings on this page.'),
);
}
$form['display'] = array(
'#tree' => TRUE,
);
$form['display']['url_cutoff'] = array(
'#type' => 'textfield',
'#title' => t('URL Display Cutoff'),
'#default_value' => isset($field['display']['url_cutoff']) ? $field['display']['url_cutoff'] : '80',
'#description' => t('If the user does not include a title for this link, the URL will be used as the title. When should the link title be trimmed and finished with an elipsis (…)? Leave blank for no limit.'),
'#maxlength' => 3,
'#size' => 3,
);
$target_options = array(
LINK_TARGET_DEFAULT => t('Default (no target attribute)'),
LINK_TARGET_TOP => t('Open link in window root'),
LINK_TARGET_NEW_WINDOW => t('Open link in new window'),
LINK_TARGET_USER => t('Allow the user to choose'),
);
$form['attributes'] = array(
'#tree' => TRUE,
);
$form['attributes']['target'] = array(
'#type' => 'radios',
'#title' => t('Link Target'),
'#default_value' => empty($field['attributes']['target']) ? LINK_TARGET_DEFAULT : $field['attributes']['target'],
'#options' => $target_options,
);
$form['attributes']['rel'] = array(
'#type' => 'textfield',
'#title' => t('Rel Attribute'),
'#description' => t('When output, this link will have this rel attribute. The most common usage is <a href="http://en.wikipedia.org/wiki/Nofollow">rel="nofollow"</a> which prevents some search engines from spidering entered links.'),
'#default_value' => empty($field['attributes']['rel']) ? '' : $field['attributes']['rel'],
'#field_prefix' => 'rel = "',
'#field_suffix' => '"',
'#size' => 20,
);
$form['attributes']['class'] = array(
'#type' => 'textfield',
'#title' => t('Additional CSS Class'),
'#description' => t('When output, this link will have this class attribute. Multiple classes should be separated by spaces.'),
'#default_value' => empty($field['attributes']['class']) ? '' : $field['attributes']['class'],
);
$form['attributes']['title'] = array(
'#title' => t("Link 'title' Attribute"),
'#type' => 'textfield',
'#field_prefix' => 'title = "',
'#field_suffix' => '"',
'#description' => t('When output, links will use this "title" attribute (when different from the link text). Read <a href="http://www.w3.org/TR/WCAG10-HTML-TECHS/#links">WCAG 1.0 Guidelines</a> for links comformances. Tokens values will be evaluated.'),
'#default_value' => empty($field['attributes']['title']) ? '' : $field['attributes']['title'],
);
return $form;
case 'validate':
if ($field['title'] == 'value' && empty($field['title_value'])) {
form_set_error('title_value', t('A default title must be provided if the title is a static value'));
}
break;
case 'save':
return array(
'attributes',
'display',
'url',
'title',
'title_value',
'title_value_visibility',
'enable_tokens',
'validate_url',
);
case 'database columns':
return array(
'url' => array(
'type' => 'varchar',
'length' => LINK_URL_MAX_LENGTH,
'not null' => FALSE,
'sortable' => TRUE,
),
'title' => array(
'type' => 'varchar',
'length' => 255,
'not null' => FALSE,
'sortable' => TRUE,
),
'attributes' => array(
'type' => 'text',
'size' => 'medium',
'not null' => FALSE,
),
);
case 'views data':
module_load_include('inc', 'link', 'views/link.views');
return link_views_content_field_data($field);
}
}
function link_content_is_empty($item, $field) {
if (empty($item['title']) && empty($item['url'])) {
return TRUE;
}
return FALSE;
}
function link_field($op, &$node, $field, &$items, $teaser, $page) {
module_load_include('inc', 'link');
switch ($op) {
case 'load':
return _link_load($field, $items);
case 'validate':
$optional_field_found = FALSE;
if (!isset($field['validate_url']) || $field['validate_url'] !== 0) {
foreach ($items as $delta => $value) {
_link_validate($items[$delta], $delta, $field, $node, $optional_field_found);
}
}
if ($field['url'] === 'optional' && $field['title'] === 'optional' && $field['required'] && !$optional_field_found) {
form_set_error($field['field_name'] . '][0][title', t('At least one title or URL must be entered.'));
}
break;
case 'presave':
case 'update':
foreach ($items as $delta => $value) {
_link_process($items[$delta], $delta, $field, $node);
}
break;
case 'sanitize':
foreach ($items as $delta => $value) {
_link_sanitize($items[$delta], $delta, $field, $node);
}
break;
}
}
function link_widget_info() {
return array(
'link' => array(
'label' => 'Link',
'field types' => array(
'link',
),
'multiple values' => CONTENT_HANDLE_CORE,
),
);
}
function link_widget(&$form, &$form_state, $field, $items, $delta = 0) {
$element = array(
'#type' => $field['widget']['type'],
'#default_value' => isset($items[$delta]) ? $items[$delta] : '',
'#title' => $field['widget']['label'],
'#weight' => $field['widget']['weight'],
'#description' => $field['widget']['description'],
'#required' => $field['required'],
'#field' => $field,
);
return $element;
}
function link_theme() {
return array(
'link_field_settings' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
'link_formatter_default' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
'link_formatter_plain' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
'link_formatter_absolute' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
'link_formatter_title_plain' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
'link_formatter_url' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
'link_formatter_short' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
'link_formatter_label' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
'link_formatter_separate' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
'link' => array(
'arguments' => array(
'element' => NULL,
),
'file' => 'link.theme.inc',
),
);
}
function link_elements() {
$elements = array();
$elements['link'] = array(
'#input' => TRUE,
'#process' => array(
'link_process',
),
);
return $elements;
}
function link_process($element, $edit, $form_state, $form) {
module_load_include('inc', 'link');
$field = $form['#field_info'][$element['#field_name']];
$delta = $element['#delta'];
$element['url'] = array(
'#type' => 'textfield',
'#maxlength' => LINK_URL_MAX_LENGTH,
'#title' => t('URL'),
'#description' => $element['#description'],
'#required' => $delta == 0 && $field['url'] !== 'optional' ? $element['#required'] : FALSE,
'#default_value' => isset($element['#value']['url']) ? $element['#value']['url'] : NULL,
);
if ($field['title'] != 'none' && $field['title'] != 'value') {
$element['title'] = array(
'#type' => 'textfield',
'#maxlength' => '255',
'#title' => t('Title'),
'#required' => $delta == 0 && $field['title'] == 'required' ? $field['required'] : FALSE,
'#default_value' => isset($element['#value']['title']) ? $element['#value']['title'] : NULL,
);
}
if (!is_array($field['attributes'])) {
$field['attributes'] = array();
}
$field['attributes'] += _link_default_attributes();
$attributes = isset($element['#value']['attributes']) ? $element['#value']['attributes'] : $field['attributes'];
if (!empty($field['attributes']['target']) && $field['attributes']['target'] == LINK_TARGET_USER) {
$element['attributes']['target'] = array(
'#type' => 'checkbox',
'#title' => t('Open URL in a New Window'),
'#return_value' => LINK_TARGET_NEW_WINDOW,
'#default_value' => $attributes['target'],
);
}
return $element;
}
function link_field_formatter_info() {
return array(
'default' => array(
'label' => t('Title, as link (default)'),
'field types' => array(
'link',
),
'multiple values' => CONTENT_HANDLE_CORE,
),
'title_plain' => array(
'label' => t('Title, as plain text'),
'field types' => array(
'link',
),
'multiple values' => CONTENT_HANDLE_CORE,
),
'url' => array(
'label' => t('URL, as link'),
'field types' => array(
'link',
),
'multiple values' => CONTENT_HANDLE_CORE,
),
'plain' => array(
'label' => t('URL, as plain text'),
'field types' => array(
'link',
),
'multiple values' => CONTENT_HANDLE_CORE,
),
'absolute' => array(
'label' => t('URL, as absolute URL'),
'field types' => array(
'link',
),
'multiple values' => CONTENT_HANDLE_CORE,
),
'short' => array(
'label' => t('Short, as link with title "Link"'),
'field types' => array(
'link',
),
'multiple values' => CONTENT_HANDLE_CORE,
),
'label' => array(
'label' => t('Label, as link with label as title'),
'field types' => array(
'link',
),
'multiple values' => CONTENT_HANDLE_CORE,
),
'separate' => array(
'label' => t('Separate title and URL'),
'field types' => array(
'link',
),
'multiple values' => CONTENT_HANDLE_CORE,
),
);
}
function link_token_list($type = 'all') {
if ($type == 'field' || $type == 'all') {
$tokens = array();
$tokens['link']['url'] = t("Link URL");
$tokens['link']['title'] = t("Link title");
$tokens['link']['view'] = t("Formatted html link");
$tokens['link']['host'] = t("Link host");
return $tokens;
}
}
function link_token_values($type, $object = NULL) {
if ($type == 'field') {
$item = $object[0];
$tokens['url'] = $item['url'];
$tokens['title'] = $item['title'];
$tokens['view'] = isset($item['view']) ? $item['view'] : '';
$host = @parse_url($item['url']);
$tokens['host'] = isset($host['host']) ? $host['host'] : '';
return $tokens;
}
}
function link_views_api() {
return array(
'api' => 2,
'path' => drupal_get_path('module', 'link') . '/views',
);
}
function link_migrate_api() {
return array(
'api' => 2,
);
}
function link_content_generate($node, $field) {
if (content_handle('widget', 'multiple values', $field) == CONTENT_HANDLE_MODULE) {
return content_devel_multiple('_link_content_generate', $node, $field);
}
else {
return _link_content_generate($node, $field);
}
}
function _link_content_generate($node, $field) {
$url = url('http://www.example.com/' . drupal_strtolower(devel_create_greeking(1, TRUE)));
$title = devel_create_greeking(mt_rand(1, 3), TRUE);
return array(
'url' => $url,
'title' => $title,
'attributes' => array(),
);
}
function _link_domains() {
$link_extra_domains = variable_get('link_extra_domains', array());
return empty($link_extra_domains) ? LINK_DOMAINS : LINK_DOMAINS . '|' . implode('|', $link_extra_domains);
}