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<?php
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// $Id: collapse_text.module,v 1.4.2.3 2008/12/15 15:47:33 pukku Exp $
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/**
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* @file
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* collapse_text is an input filter that allows text to be collapsible
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*/
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/**
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* Implementation of hook_filter_tips().
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*/
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function collapse_text_filter_tips($delta, $format, $long = false) {
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if ($long) {
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return t('Enclose sections of text in [collapse] and [/collapse] to turn them into collapsible sections. If you use [collapse collapsed] and [/collapse], the section will start out collapsed. You may specify a title with [collapse title=some title] (or [collapse collapsed title=some title]). If no title is specified, the title will be taken from the first header (<h1>, <h2>, <h3>, ...) found. In the absence of a header, a default title is used.');
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}
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else {
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return t('Make collapsible text blocks using [collapse] and [/collapse].');
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}
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}
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/**
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* Implementation of hook_filter().
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*/
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function collapse_text_filter($op, $delta = 0, $format = -1, $text = '') {
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switch ($op) {
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case 'list':
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return array(
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0 => t('Collapse text')
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);
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break;
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case 'description':
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return t('Make collapsing text sections');
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break;
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case 'settings':
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// This filter has no user settings.
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break;
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case 'no cache':
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return FALSE;
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break;
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case 'prepare':
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return $text;
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break;
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case 'process':
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return collapse_text_process($text);
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break;
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default:
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return $text;
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break;
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}
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}
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/**
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* Provides a layer of encapsulation for the regex call.
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*/
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function collapse_text_process($text) {
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// Per #259535 and #233877, add ability to specify title
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// in collapse text. Thanks rivena, Justyn
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$text = preg_replace_callback('/
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\[ # look for an opening bracket
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collapse # followed by the word `collapse`
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(\ collapsed)? # followed by (optionally) a space and the word `collapsed` (captured)
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(?:\ title=([^\]]*))? # followed by (optionally) a space and a title, consisting of any
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# characters except a close bracket (captured)
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\] # followed by a closing bracket
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(.+?) # then capture as few characters as possible until
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\[\/collapse\] # a closing "tag", which is a slash followed by `collapse` in brackets
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/smx',
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"_collapse_text_replace_callback", $text);
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return $text;
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}
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function _collapse_text_replace_callback($matches) {
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// 2008-12-15 REMorse (no issue number) added space to make
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// $collapsed work
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$collapsed = ($matches[1] == ' collapsed');
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$title = trim($matches[2]);
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$interior = $matches[3];
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if (empty($title)) {
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// If a title is not supplied, look for a header (<h1>, <h2> ...)
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// and use it as the title.
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$h_matches = array();
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preg_match('/<h\d[^>]*>(.+?)<\/h\d>/smi', $interior, $h_matches);
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$title = strip_tags($h_matches[1]);
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}
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if (empty($title)) {
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// If there is still no title, provide some default text.
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// Added call to t() per #256176 yngens
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$title = t('Use the arrow to expand or collapse this section');
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}
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$render_array = array(
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'#type' => 'fieldset',
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'#title' => $title,
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'#collapsible' => true,
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'#collapsed' => $collapsed,
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);
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$render_array['text_contents'] = array(
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'#type' => 'markup',
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'#value' => '<div>' . $interior . '</div>',
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);
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return drupal_render($render_array);
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}
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/**
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* Implementation of hook_init().
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*
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* Due to caching issues, `collapse.js` is not properly added to
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* a page when the cached version is used. This adds `collapse.js`
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* to every page. This is not really the right way to solve the
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* problem, but I don't know that Drupal provides us with the
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* ability to attach CSS files to input filter caches.
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*
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* Per #256354 and #231529. Thanks rolf, sza, jippie1948, Justyn
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*/
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function collapse_text_init() {
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drupal_add_js('misc/collapse.js', 'core');
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}
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