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<?php
/**
* @file
* Contains the RSS style plugin.
*/
/**
* Default style plugin to render an RSS feed.
*
* @ingroup views_style_plugins
*/
class views_plugin_style_rss extends views_plugin_style {
function attach_to($display_id, $path, $title) {
$display = $this->view->display[$display_id]->handler;
$url_options = array();
$input = $this->view->get_exposed_input();
if ($input) {
$url_options['query'] = $input;
}
$url_options['absolute'] = TRUE;
$url = url($this->view->get_url(NULL, $path), $url_options);
if ($display->has_path()) {
if (empty($this->preview)) {
drupal_add_feed($url, $title);
}
}
else {
if (empty($this->view->feed_icon)) {
$this->view->feed_icon = '';
}
$this->view->feed_icon .= theme('feed_icon', array('url' => $url, 'title' => $title));
drupal_add_html_head_link(array(
'rel' => 'alternate',
'type' => 'application/rss+xml',
'title' => $title,
'href' => $url
));
}
}
function option_definition() {
$options = parent::option_definition();
$options['description'] = array('default' => '', 'translatable' => TRUE);
return $options;
}
function options_form(&$form, &$form_state) {
parent::options_form($form, $form_state);
$form['description'] = array(
'#type' => 'textfield',
'#title' => t('RSS description'),
'#default_value' => $this->options['description'],
'#description' => t('This will appear in the RSS feed itself.'),
'#maxlength' => 1024,
);
}
/**
* Return an array of additional XHTML elements to add to the channel.
*
* @return
* An array that can be passed to format_xml_elements().
*/
function get_channel_elements() {
return array();
}
/**
* Return an atom:link XHTML element to add to the channel to comply with
* the RSS 2.0 specification.
*
* @see http://validator.w3.org/feed/docs/warning/MissingAtomSelfLink.html
*
* @return
* An array that can be passed to format_xml_elements().
*/
function get_channel_elements_atom_link() {
$url_options = array('absolute' => TRUE);
$input = $this->view->get_exposed_input();
if ($input) {
$url_options['query'] = $input;
}
$url = url($this->view->get_url(), $url_options);
return array(
array(
'namespace' => array('xmlns:atom' => 'http://www.w3.org/2005/Atom'),
'key' => 'atom:link',
'attributes' => array(
'href' => $url,
'rel' => 'self',
'type' => 'application/rss+xml',
),
),
);
}
/**
* Get RSS feed description.
*
* @return string
* The string containing the description with the tokens replaced.
*/
function get_description() {
$description = $this->options['description'];
// Allow substitutions from the first row.
$description = $this->tokenize_value($description, 0);
return $description;
}
function render() {
if (empty($this->row_plugin)) {
vpr('views_plugin_style_default: Missing row plugin');
return;
}
$rows = '';
// This will be filled in by the row plugin and is used later on in the
// theming output.
$this->namespaces = array('xmlns:dc' => 'http://purl.org/dc/elements/1.1/');
// Fetch any additional elements for the channel and merge in their
// namespaces.
$this->channel_elements = array_merge(
$this->get_channel_elements(),
$this->get_channel_elements_atom_link()
);
foreach ($this->channel_elements as $element) {
if (isset($element['namespace'])) {
$this->namespaces = array_merge($this->namespaces, $element['namespace']);
}
}
foreach ($this->view->result as $row_index => $row) {
$this->view->row_index = $row_index;
$rows .= $this->row_plugin->render($row);
}
$output = theme($this->theme_functions(),
array(
'view' => $this->view,
'options' => $this->options,
'rows' => $rows
));
unset($this->view->row_index);
return $output;
}
}
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