303 lines
10 KiB
PHP
303 lines
10 KiB
PHP
<?php
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/**
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* Static functions for the plugin.
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*/
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class PhotoSwipeFunctions {
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/**
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* Class-wide flag that the PhotoSwipe overlay UI has already been initialized
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*
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* @var boolean
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*/
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private static $photoswipeUiIsInitialized = false;
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/**
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* Class-wide index counter for the shown images
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*
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* @var int
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*/
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private static $lastusedDataIndex = 0;
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/**
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* Callback function called for [img] tags which returns the HTML code for a single PhotoSwipe image.
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*
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* @param string $action
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* @param array $attr
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* the attributes given in the tag
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* @param string $content
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* @param array $params
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* @param string $node_object
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* @return boolean|string the HTML code for a single PhotoSwipe image
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*/
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static function getImageHtml($action, $attr, $content, $params, $node_object) {
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global $lang;
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if ($action == 'validate') {
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// not used for now
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return true;
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}
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// the name of the image - and its relative path
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$img = $attr ['default'];
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// sanitize first
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if (strpos($img, '..') !== false) {
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return $lang ['plugin'] ['photoswipe'] ['label_imagedoesntexist'];
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}
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$imgPathRel = 'fp-content/' . $img;
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$imgUrl = BLOG_BASEURL . 'fp-content/' . $img;
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// check if dir exists
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if (!file_exists($imgPathRel)) {
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return $lang ['plugin'] ['photoswipe'] ['label_imagedoesntexist'] . ' ' . $img;
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}
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// image title will be its file name - or the title from the tag attributes, if given
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$title = isset($attr ['title']) ? $attr ['title'] : '';
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// for usage in HTML attributes, we need to remove quotes and HTML tags from the title
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$titleForAttributes = isset($attr ['title']) ? htmlentities(strip_tags($attr ['title'])) : '';
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// image may float, according the the given float attribute
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$float = ' class="thumbnail nofloat" ';
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if (isset($attr ['float'])) {
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$float = ' class="thumbnail float' . $attr ['float'] . '"';
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}
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// to get the HTML code for preview image, we use the Flatpress standard function do_bbcode_img()
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$attr ['title'] = $titleForAttributes;
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$previewHtml = do_bbcode_img(null, $attr, null, null, null);
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// but: we don't need the popup link surrounding the resulting <img> tag
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$matches = null;
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preg_match('/<img[^>]*/u', $previewHtml, $matches);
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$previewHtml = $matches [0];
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if ($previewHtml [strlen($previewHtml) - 1] === '/') {
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$previewHtml = substr($previewHtml, 0, strlen($previewHtml) - 1);
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}
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// add some additional attributes to the <img> tag and close it properly
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$previewHtml .= ' itemprop="thumbnail" title="' . $titleForAttributes . '">';
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// PhotoSwipe needs to know the dimensions of the image - so we read them
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$imgsize = getimagesize($imgPathRel);
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// now lets assemble the whole HTML code - including the overlay HTML, if not inserted into the DOM before
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$imgHtml = self::getPhotoSwipeOverlay() . //
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'<div class="photoswipe">
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<figure ' . //
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'itemprop="associatedMedia" ' . //
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'itemscope ' . //
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'itemtype="http://schema.org/ImageObject" ' . //
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'data-index="' . self::$lastusedDataIndex . '" ' . //
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$float . ' ' . //
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'>' . //
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'<a ' . //
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'href="' . $imgUrl . '" ' . //
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'itemprop="contentUrl" ' . //
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'data-size="' . $imgsize [0] . 'x' . $imgsize [1] . '" ' . //
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'data-index="' . self::$lastusedDataIndex . '" ' . //
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'title="' . htmlentities($title) . '" ' . //
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'>' . //
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$previewHtml . //
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'</a>' . //
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'<figcaption>' . $title . '</figcaption>' . //
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'</figure>' . //
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'</div>';
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self::$lastusedDataIndex++;
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return $imgHtml;
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}
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/**
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* Callback function called for [gallery] tags which returns the HTML code for a PhotoSwipe gallery.
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*
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* @param string $action
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* @param array $attr
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* the attributes given in the tag
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* @param string $content
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* @param array $params
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* @param string $node_object
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* @return boolean|string the HTML code for a PhotoSwipe gallery
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*/
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static function getGalleryHtml($action, $attr, $content, $params, $node_object) {
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global $lang;
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if ($action == 'validate') {
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// not used for now
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return true;
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}
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// gallery dir is set as tag attribute
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$dir = $attr ['default'];
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// sanitize first
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if (strpos($dir, '..') !== false) {
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return $lang ['plugin'] ['photoswipe'] ['label_gallerydoesntexist'];
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}
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// check if dir exists
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if (!file_exists("fp-content/" . $dir)) {
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return $lang ['plugin'] ['photoswipe'] ['label_gallerydoesntexist'] . ' ' . $dir;
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}
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// force slash at the end
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if (substr($dir, -1) != '/') {
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$dir .= '/';
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}
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// read images from gallery directory
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$imagefiles = gallery_read_images($dir);
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// read image caption from captions file (if existant in the gallery directory)
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$captions = gallery_read_captions($dir);
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// call getImageHtml() to get the image's HTML code for each image in the gallery dir
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$imgattr = $attr;
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$str = '<div class="img-gallery ' . sanitize_title($dir) . '">';
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foreach ($imagefiles as $f) {
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// set the image's caption as title attribut of the img tag
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$imgattr ['default'] = $dir . $f;
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$imgattr ['title'] = array_key_exists($f, $captions) ? $captions [$f] : '';
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$str .= self::getImageHtml($action, $imgattr, $content, $params, $node_object);
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}
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return $str . '</div>';
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}
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/**
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* Returns the overlay HTML.
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* This needs to be inserted into the DOM only once, so a second call will return an empty string.
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*
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* @return string the PhotoSwipe overlay HTML
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*/
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static function getPhotoSwipeOverlay() {
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global $lang;
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$photoswipeoverlay = self::$photoswipeUiIsInitialized ? '' : '<div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">' . //
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'<div class="pswp__bg"></div>' . //
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'<div class="pswp__scroll-wrap">' . //
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'<div class="pswp__container">' . //
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'<div class="pswp__item"></div>' . //
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'<div class="pswp__item"></div>' . //
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'<div class="pswp__item">' . //
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'</div>' . //
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'</div>' . //
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'<div class="pswp__ui pswp__ui--hidden">' . //
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'<div class="pswp__top-bar">' . //
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'<div class="pswp__counter"></div>' . //
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'<button class="pswp__button pswp__button--close" title="' . $lang ['plugin'] ['photoswipe'] ['tooltip_closebutton'] . '"></button>' . //
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'<button class="pswp__button pswp__button--share" title="' . $lang ['plugin'] ['photoswipe'] ['tooltip_sharebutton'] . '"></button>' . //
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'<button class="pswp__button pswp__button--fs" title="' . $lang ['plugin'] ['photoswipe'] ['tooltip_fullscreenbutton'] . '"></button>' . //
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'<button class="pswp__button pswp__button--zoom" title="' . $lang ['plugin'] ['photoswipe'] ['tooltip_zoombutton'] . '"></button>' . //
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'<div class="pswp__preloader">' . //
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'<div class="pswp__preloader__icn">' . //
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'<div class="pswp__preloader__cut">' . //
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'<div class="pswp__preloader__donut"></div>' . //
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'</div>' . //
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'</div>' . //
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'</div>' . //
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'</div>' . //
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'<div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">' . //
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'<div class="pswp__share-tooltip"></div>' . //
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'</div>' . //
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'<button class="pswp__button pswp__button--arrow--left" title="' . $lang ['plugin'] ['photoswipe'] ['tooltip_prevbutton'] . '"></button>' . //
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'<button class="pswp__button pswp__button--arrow--right" title="' . $lang ['plugin'] ['photoswipe'] ['tooltip_nextbutton'] . '"></button>' . //
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'<div class="pswp__caption">' . //
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'<div class="pswp__caption__center"></div>' . //
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'</div>' . //
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'</div>' . //
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'</div>' . //
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'</div>';
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self::$photoswipeUiIsInitialized = true;
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return $photoswipeoverlay;
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}
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/**
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* Header hook for loading the PhotoSwipe scripts.
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* Echoes the <script> tags.
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*/
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static function echoScriptTags() {
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$pdir = plugin_geturl('photoswipe');
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echo '<!-- PhotoSwipe -->
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';
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if (!function_exists('plugin_jquery_head')) {
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echo '<script src="' . $pdir . 'res/jquery-2.2.2/jquery-2.2.2.min.js"></script>
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';
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}
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echo '
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<script src="' . $pdir . 'res/photoswipe-4.1.1/photoswipe-ui-default.min.js"></script>
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<script src="' . $pdir . 'res/photoswipe-4.1.1/photoswipe.min.js"></script>
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<scripst src="' . $pdir . 'res/photoswipe.js.php">
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<script>';
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include_once (dirname(__FILE__) . '/res/photoswipe.js.php');
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echo '
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</script>
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<link rel="stylesheet" property="stylesheet" href="' . $pdir . 'res/photoswipe-4.1.1/default-skin/default-skin.css">
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<link media="screen" href="' . $pdir . 'res/photoswipe-4.1.1/photoswipe.css" type="text/css" rel="stylesheet">
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<!-- /PhotoSwipe -->';
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}
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/**
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* Initializes the BBCode tags of the plugin.
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*/
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public static function initializePluginTags() {
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// At first: check if BBCode plugin is active
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if (!function_exists('plugin_bbcode_init')) {
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// if not, there's no use in adding any bbcode tags :)
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return;
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}
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// get the global bbcode object
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$bbcode = plugin_bbcode_init();
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// gallery tags
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$supportedGalleryTags = array(
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'gallery', // default tag
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'photoswipegallery' // legacy tag - maintaining compatibility with plugin versions <= 1.1
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);
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foreach ($supportedGalleryTags as $tag) {
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// add gallery tag
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$bbcode->addCode($tag, // tag name: this will go between square brackets
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'callback_replace_single', // type of action: we'll use a callback function
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'PhotoSwipeFunctions::getGalleryHtml', // name of the callback function
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array(
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'usecontent_param' => array(
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'default'
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)
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), // supported parameters: "default" is [acronym=valore]
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'inline', // type of the tag, inline or block, etc
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array(
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'listitem',
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'block',
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'inline',
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'link'
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), // type of elements in which you can use this tag
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array()); // type of elements where this tag CAN'T go (in this case, none, so it can go everywhere)
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$bbcode->setCodeFlag($tag, 'closetag', BBCODE_CLOSETAG_FORBIDDEN); // a closing tag is forbidden (no [/tag])
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}
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// single image tags
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$supportedImageTags = array(
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'img', // default tag
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'photoswipeimage' // legacy tag - maintaining compatibility with plugin versions <= 1.1
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);
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foreach ($supportedImageTags as $tag) {
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// at first: remove tag to make sure it will be overridden
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$bbcode->removeCode($tag);
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// add image tag
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$bbcode->addCode($tag, // tag name: this will go between square brackets
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'callback_replace_single', // type of action: we'll use a callback function
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'PhotoSwipeFunctions::getImageHtml', // name of the callback function
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array(
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'usecontent_param' => array(
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'default'
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)
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), // supported parameters: "default" is [acronym=valore]
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'inline', // type of the tag, inline or block, etc
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array(
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'listitem',
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'block',
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'inline',
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'link'
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), // type of elements in which you can use this tag
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array()); // type of elements where this tag CAN'T go (in this case, none, so it can go everywhere)
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$bbcode->setCodeFlag($tag, 'closetag', BBCODE_CLOSETAG_FORBIDDEN); // a closing tag is forbidden (no [/tag])
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}
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}
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}
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