onli
88a89436ae
Also, use width to detect if the user only selected a thumbnail, and accordingly reduce the srcset selection
217 lines
8.8 KiB
PHP
217 lines
8.8 KiB
PHP
<?php
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if (IN_serendipity !== true) {
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die ("Don't hack!");
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}
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@serendipity_plugin_api::load_language(dirname(__FILE__));
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class serendipity_event_responsiveimages extends serendipity_event
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{
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var $title = PLUGIN_EVENT_RESPONSIVE_NAME;
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function introspect(&$propbag)
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{
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global $serendipity;
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$propbag->add('name', PLUGIN_EVENT_RESPONSIVE_NAME);
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$propbag->add('description', PLUGIN_EVENT_RESPONSIVE_DESC);
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$propbag->add('stackable', false);
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$propbag->add('author', 'Serendipity Team');
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$propbag->add('version', '0.2');
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$propbag->add('requirements', array(
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'serendipity' => '2.2',
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));
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$propbag->add('cachable_events', array('frontend_display' => true));
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$propbag->add('event_hooks', array('frontend_display' => true,
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'backend_media_makethumb' => true
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));
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$propbag->add('groups', array('MARKUP'));
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$this->markup_elements = array(
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array(
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'name' => 'ENTRY_BODY',
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'element' => 'body',
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),
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array(
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'name' => 'EXTENDED_BODY',
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'element' => 'extended',
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)
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);
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$conf_array = array();
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foreach($this->markup_elements as $element) {
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$conf_array[] = $element['name'];
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}
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$propbag->add('configuration', $conf_array);
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}
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function install()
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{
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serendipity_plugin_api::hook_event('backend_cache_entries', $this->title);
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}
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function uninstall(&$propbag)
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{
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serendipity_plugin_api::hook_event('backend_cache_purge', $this->title);
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serendipity_plugin_api::hook_event('backend_cache_entries', $this->title);
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}
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function generate_content(&$title)
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{
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$title = $this->title;
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}
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function introspect_config_item($name, &$propbag)
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{
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$propbag->add('type', 'boolean');
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$propbag->add('name', constant($name));
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$propbag->add('description', sprintf(APPLY_MARKUP_TO, constant($name)));
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$propbag->add('default', 'true');
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return true;
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}
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function event_hook($event, &$bag, &$eventData, $addData = null)
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{
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global $serendipity;
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$hooks = &$bag->get('event_hooks');
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if (isset($hooks[$event])) {
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switch($event) {
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case 'frontend_display':
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foreach ($this->markup_elements as $temp) {
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if (serendipity_db_bool($this->get_config($temp['name'], true)) && isset($eventData[$temp['element']]) &&
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!$eventData['properties']['ep_disable_markup_' . $this->instance] &&
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!isset($serendipity['POST']['properties']['disable_markup_' . $this->instance])) {
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$element = $temp['element'];
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$eventData[$element] = $this->_responsive_markup($eventData[$element]);
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}
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}
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break;
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case 'backend_media_makethumb':
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echo $addData;
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// $eventData is usually defined as:
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// array(array(
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// 'thumbSize' => $serendipity['thumbSize'],
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// 'thumb' => $serendipity['thumbSuffix']
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// ));
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// We now just need to add the additional array elements, with the new sizes and suffix.
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// We can use $addData, containing the path to the full size file, to get the starting width
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$origSize = serendipity_getimagesize($addData);
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$eventData[] = array(
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'thumbSize' => ['width' => $origSize[0] * 3 / 4, 'height' => $origSize[1] * 3 / 4],
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'thumb' => '3X.' . $serendipity['thumbSuffix']
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);
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$eventData[] = array(
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'thumbSize' => ['width' => $origSize[0] / 2, 'height' => $origSize[1] / 2],
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'thumb' => '2X.' . $serendipity['thumbSuffix']
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);
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$eventData[] = array(
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'thumbSize' => ['width' => $origSize[0] / 4, 'height' => $origSize[1] / 4],
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'thumb' => '1X.' . $serendipity['thumbSuffix']
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);
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if ($serendipity['thumbConstraint'] == 'width' || ($serendipity['thumbConstraint'] == 'largest' && $origSize[0] > $origSize[1]) ) {
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$ratio = $serendipity['thumbSize'] / $origSize[0];
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$thumbnailWidth = $serendipity['thumbSize'];
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} else {
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// the thumbnail will be scaled based on its height
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$ratio = $serendipity['thumbSize'] / $origSize[1];
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$thumbnailWidth = $origSize[0] * $ratio;
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}
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$eventData[] = array(
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'thumbSize' => ['width' => $thumbnailWidth / 2, 'height' => ($origSize[1] * $ratio) / 2],
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'thumb' => 'halfThumbnail.' . $serendipity['thumbSuffix']
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);
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break;
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default:
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return false;
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}
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return true;
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} else {
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return false;
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}
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}
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/* Given an entry text, replace each image linked to the ML with an img element containing
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* an srcset. TODO: Which sizes to create depends on the theme settings, if none are set
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* use a sound default (original=4x, 3x, 2x, 1x, default thumbnail, half thumbnail)
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* */
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function _responsive_markup($text)
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{
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preg_match_all('@<!-- s9ymdb:(?<id>\d+) -->@', $text, $matches);
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foreach ($matches['id'] as $imgId) {
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preg_match('@<!-- s9ymdb:\d+ --><img[^>]+width=["\'](\d+)["\']@', $text, $matches);
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if ($matches[1]) {
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$srcset = $this->createSrcset($imgId, $matches[1]);
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} else {
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$srcset = $this->createSrcset($imgId);
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}
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$text = preg_replace("@(<!-- s9ymdb:$imgId -->.*)src=@", "$1 $srcset src=", $text);
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}
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return $text;
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}
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/* Given an id for a image in the ML, create an srcset using smaller thumbnail images and their width.
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* Don't worry over thumbnail creation here, that's done on image upload and thumbnail creation.
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* */
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function createSrcset($id, $maxWidth = 20000) {
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global $serendipity;
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$imgBase = $serendipity['serendipityHTTPPath'] . $serendipity['uploadHTTPPath'];
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$origImage = serendipity_fetchImageFromDatabase($id);
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$extension = $origImage['extension'];
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$width4X = $origImage['dimensions_width'];
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$path4X = $imgBase . $origImage['realname'];
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$width3X = $width4X * 3 / 4;
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$path3X = $imgBase . preg_replace("@.$extension\z@", '', $origImage['realname']) . ".3X.{$serendipity['thumbSuffix']}.$extension";
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$width2X = $width4X / 2;
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$path2X = $imgBase . preg_replace("@.$extension\z@", '', $origImage['realname']) . ".2X.{$serendipity['thumbSuffix']}.$extension";
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$width1X = $width4X / 4;
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$path1X = $imgBase . preg_replace("@.$extension\z@", '', $origImage['realname']) . ".1X.{$serendipity['thumbSuffix']}.$extension";
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$thumbnailPath = $serendipity['serendipityPath'] . $serendipity['uploadPath'] . preg_replace("@.$extension\z@", '', $origImage['realname']) . ".{$serendipity['thumbSuffix']}.$extension";
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$widthThumbnail = serendipity_getimagesize($thumbnailPath)[0];
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$thumbnail = $imgBase . preg_replace("@.$extension\z@", '', $origImage['realname']) . ".{$serendipity['thumbSuffix']}.$extension";
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$widthHalfThumbnail = $widthThumbnail / 2;
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$halfThumbnail = $imgBase . preg_replace("@.$extension\z@", '', $origImage['realname']) . ".halfThumbnail.{$serendipity['thumbSuffix']}.$extension";
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$srcset = "srcset='";
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if ($width4X <= $maxWidth) {
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$srcset .= "$path4X {$width4X}w,";
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}
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if ($width3X <= $maxWidth) {
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$srcset .= "$path3X {$width3X}w,";
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}
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if ($width2X <= $maxWidth) {
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$srcset .= "$path2X {$width2X}w,";
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}
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if ($width1X <= $maxWidth) {
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$srcset .= "$path1X {$width1X}w,";
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}
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$srcset .= "$thumbnail {$widthThumbnail}w, $halfThumbnail {$widthHalfThumbnail}w'";
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return $srcset;
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}
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}
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/* vim: set sts=4 ts=4 expandtab : */
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?>
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