704 lines
20 KiB
PHP
704 lines
20 KiB
PHP
<?php
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/**
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* DokuWiki StyleSheet creator
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*
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* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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use LesserPHP\Lessc;
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use dokuwiki\StyleUtils;
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use dokuwiki\Cache\Cache;
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use dokuwiki\Extension\Event;
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if (!defined('DOKU_INC')) define('DOKU_INC', __DIR__ . '/../../');
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if (!defined('NOSESSION')) define('NOSESSION', true); // we do not use a session or authentication here (better caching)
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if (!defined('DOKU_DISABLE_GZIP_OUTPUT')) define('DOKU_DISABLE_GZIP_OUTPUT', 1); // we gzip ourself here
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if (!defined('NL')) define('NL', "\n");
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require_once(DOKU_INC . 'inc/init.php');
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// Main (don't run when UNIT test)
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if (!defined('SIMPLE_TEST')) {
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header('Content-Type: text/css; charset=utf-8');
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css_out();
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}
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// ---------------------- functions ------------------------------
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/**
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* Output all needed Styles
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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function css_out()
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{
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global $conf;
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global $lang;
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global $config_cascade;
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global $INPUT;
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if ($INPUT->str('s') == 'feed') {
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$mediatypes = ['feed'];
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$type = 'feed';
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} else {
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$mediatypes = ['screen', 'all', 'print', 'speech'];
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$type = '';
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}
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// decide from where to get the template
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$tpl = trim(preg_replace('/[^\w-]+/', '', $INPUT->str('t')));
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if (!$tpl) {
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$tpl = $conf['template'];
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}
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// load style.ini
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$styleUtil = new StyleUtils($tpl, $INPUT->bool('preview'));
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$styleini = $styleUtil->cssStyleini();
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// cache influencers
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$tplinc = tpl_incdir($tpl);
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$cache_files = getConfigFiles('main');
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$cache_files[] = $tplinc . 'style.ini';
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$cache_files[] = DOKU_CONF . "tpl/$tpl/style.ini";
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$cache_files[] = __FILE__;
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if ($INPUT->bool('preview')) {
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$cache_files[] = $conf['cachedir'] . '/preview.ini';
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}
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// Array of needed files and their web locations, the latter ones
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// are needed to fix relative paths in the stylesheets
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$media_files = [];
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foreach ($mediatypes as $mediatype) {
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$files = [];
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// load core styles
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$files[DOKU_INC . 'lib/styles/' . $mediatype . '.css'] = DOKU_BASE . 'lib/styles/';
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// load jQuery-UI theme
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if ($mediatype == 'screen') {
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$files[DOKU_INC . 'lib/scripts/jquery/jquery-ui-theme/smoothness.css'] =
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DOKU_BASE . 'lib/scripts/jquery/jquery-ui-theme/';
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}
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// load plugin styles
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$files = array_merge($files, css_pluginstyles($mediatype));
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// load template styles
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if (isset($styleini['stylesheets'][$mediatype])) {
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$files = array_merge($files, $styleini['stylesheets'][$mediatype]);
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}
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// load user styles
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if (isset($config_cascade['userstyle'][$mediatype]) && is_array($config_cascade['userstyle'][$mediatype])) {
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foreach ($config_cascade['userstyle'][$mediatype] as $userstyle) {
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$files[$userstyle] = DOKU_BASE;
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}
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}
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// Let plugins decide to either put more styles here or to remove some
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$media_files[$mediatype] = css_filewrapper($mediatype, $files);
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$CSSEvt = new Event('CSS_STYLES_INCLUDED', $media_files[$mediatype]);
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// Make it preventable.
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if ($CSSEvt->advise_before()) {
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$cache_files = array_merge($cache_files, array_keys($media_files[$mediatype]['files']));
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} else {
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// unset if prevented. Nothing will be printed for this mediatype.
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unset($media_files[$mediatype]);
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}
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// finish event.
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$CSSEvt->advise_after();
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}
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// The generated script depends on some dynamic options
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$cache = new Cache(
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'styles' .
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$_SERVER['HTTP_HOST'] .
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$_SERVER['SERVER_PORT'] .
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$INPUT->bool('preview') .
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DOKU_BASE .
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$tpl .
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$type,
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'.css'
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);
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$cache->setEvent('CSS_CACHE_USE');
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// check cache age & handle conditional request
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// This may exit if a cache can be used
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$cache_ok = $cache->useCache(['files' => $cache_files]);
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http_cached($cache->cache, $cache_ok);
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// start output buffering
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ob_start();
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// Fire CSS_STYLES_INCLUDED for one last time to let the
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// plugins decide whether to include the DW default styles.
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// This can be done by preventing the Default.
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$media_files['DW_DEFAULT'] = css_filewrapper('DW_DEFAULT');
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Event::createAndTrigger('CSS_STYLES_INCLUDED', $media_files['DW_DEFAULT'], 'css_defaultstyles');
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// build the stylesheet
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foreach ($mediatypes as $mediatype) {
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// Check if there is a wrapper set for this type.
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if (!isset($media_files[$mediatype])) {
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continue;
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}
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$cssData = $media_files[$mediatype];
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// Print the styles.
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echo NL;
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if ($cssData['encapsulate'] === true) {
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echo $cssData['encapsulationPrefix'] . ' {';
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}
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echo '/* START ' . $cssData['mediatype'] . ' styles */' . NL;
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// load files
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foreach ($cssData['files'] as $file => $location) {
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$display = str_replace(fullpath(DOKU_INC), '', fullpath($file));
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echo "\n/* XXXXXXXXX $display XXXXXXXXX */\n";
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echo css_loadfile($file, $location);
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}
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echo NL;
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if ($cssData['encapsulate'] === true) {
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echo '} /* /@media ';
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} else {
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echo '/*';
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}
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echo ' END ' . $cssData['mediatype'] . ' styles */' . NL;
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}
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// end output buffering and get contents
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$css = ob_get_contents();
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ob_end_clean();
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// strip any source maps
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stripsourcemaps($css);
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// apply style replacements
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$css = css_applystyle($css, $styleini['replacements']);
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// parse less
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$css = css_parseless($css);
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// compress whitespace and comments
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if ($conf['compress']) {
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$css = css_compress($css);
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}
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// embed small images right into the stylesheet
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if ($conf['cssdatauri']) {
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$base = preg_quote(DOKU_BASE, '#');
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$css = preg_replace_callback('#(url\([ \'"]*)(' . $base . ')(.*?(?:\.(png|gif)))#i', 'css_datauri', $css);
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}
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http_cached_finish($cache->cache, $css);
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}
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/**
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* Uses phpless to parse LESS in our CSS
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*
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* most of this function is error handling to show a nice useful error when
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* LESS compilation fails
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*
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* @param string $css
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* @return string
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*/
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function css_parseless($css)
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{
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global $conf;
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$less = new Lessc();
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$less->setImportDir([DOKU_INC]);
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$less->setPreserveComments(!$conf['compress']);
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if (defined('DOKU_UNITTEST')) {
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$less->addImportDir(TMP_DIR);
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}
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try {
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return $less->compile($css);
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} catch (Exception $e) {
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// get exception message
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$msg = str_replace(["\n", "\r", "'"], [], $e->getMessage());
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// try to use line number to find affected file
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if (preg_match('/line: (\d+)$/', $msg, $m)) {
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$msg = substr($msg, 0, -1 * strlen($m[0])); //remove useless linenumber
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$lno = $m[1];
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// walk upwards to last include
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$lines = explode("\n", $css);
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for ($i = $lno - 1; $i >= 0; $i--) {
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if (preg_match('/\/(\* XXXXXXXXX )(.*?)( XXXXXXXXX \*)\//', $lines[$i], $m)) {
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// we found it, add info to message
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$msg .= ' in ' . $m[2] . ' at line ' . ($lno - $i);
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break;
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}
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}
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}
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// something went wrong
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$error = 'A fatal error occured during compilation of the CSS files. ' .
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'If you recently installed a new plugin or template it ' .
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'might be broken and you should try disabling it again. [' . $msg . ']';
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echo ".dokuwiki:before {
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content: '$error';
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background-color: red;
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display: block;
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background-color: #fcc;
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border-color: #ebb;
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color: #000;
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padding: 0.5em;
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}";
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exit;
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}
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}
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/**
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* Does placeholder replacements in the style according to
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* the ones defined in a templates style.ini file
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*
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* This also adds the ini defined placeholders as less variables
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* (sans the surrounding __ and with a ini_ prefix)
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*
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* @param string $css
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* @param array $replacements array(placeholder => value)
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* @return string
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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function css_applystyle($css, $replacements)
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{
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// we convert ini replacements to LESS variable names
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// and build a list of variable: value; pairs
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$less = '';
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foreach ((array)$replacements as $key => $value) {
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$lkey = trim($key, '_');
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$lkey = '@ini_' . $lkey;
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$less .= "$lkey: $value;\n";
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$replacements[$key] = $lkey;
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}
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// we now replace all old ini replacements with LESS variables
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$css = strtr($css, $replacements);
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// now prepend the list of LESS variables as the very first thing
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$css = $less . $css;
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return $css;
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}
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/**
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* Wrapper for the files, content and mediatype for the event CSS_STYLES_INCLUDED
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*
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* @param string $mediatype type ofthe current media files/content set
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* @param array $files set of files that define the current mediatype
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* @return array
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*
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* @author Gerry Weißbach <gerry.w@gammaproduction.de>
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*/
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function css_filewrapper($mediatype, $files = [])
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{
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return [
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'files' => $files,
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'mediatype' => $mediatype,
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'encapsulate' => $mediatype != 'all',
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'encapsulationPrefix' => '@media ' . $mediatype
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];
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}
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/**
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* Prints the @media encapsulated default styles of DokuWiki
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*
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* This function is being called by a CSS_STYLES_INCLUDED event
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* The event can be distinguished by the mediatype which is:
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* DW_DEFAULT
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*
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* @author Gerry Weißbach <gerry.w@gammaproduction.de>
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*/
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function css_defaultstyles()
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{
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// print the default classes for interwiki links and file downloads
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echo '@media screen {';
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css_interwiki();
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css_filetypes();
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echo '}';
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}
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/**
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* Prints classes for interwikilinks
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*
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* Interwiki links have two classes: 'interwiki' and 'iw_$name>' where
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* $name is the identifier given in the config. All Interwiki links get
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* an default style with a default icon. If a special icon is available
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* for an interwiki URL it is set in it's own class. Both classes can be
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* overwritten in the template or userstyles.
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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function css_interwiki()
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{
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// default style
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echo 'a.interwiki {';
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echo ' background: transparent url(' . DOKU_BASE . 'lib/images/interwiki.svg) 0 0 no-repeat;';
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echo ' background-size: 1.2em;';
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echo ' padding: 0 0 0 1.4em;';
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echo '}';
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// additional styles when icon available
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$iwlinks = getInterwiki();
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foreach (array_keys($iwlinks) as $iw) {
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$class = preg_replace('/[^_\-a-z0-9]+/i', '_', $iw);
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foreach (['svg', 'png', 'gif'] as $ext) {
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$file = 'lib/images/interwiki/' . $iw . '.' . $ext;
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if (file_exists(DOKU_INC . $file)) {
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echo "a.iw_$class {";
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echo ' background-image: url(' . DOKU_BASE . $file . ')';
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echo '}';
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break;
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}
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}
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}
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}
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/**
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* Prints classes for file download links
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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function css_filetypes()
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{
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// default style
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echo '.mediafile {';
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echo ' background: transparent url(' . DOKU_BASE . 'lib/images/fileicons/svg/file.svg) 0px 1px no-repeat;';
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echo ' background-size: 1.2em;';
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echo ' padding-left: 1.5em;';
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echo '}';
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// additional styles when icon available
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// scan directory for all icons
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$exts = [];
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if ($dh = opendir(DOKU_INC . 'lib/images/fileicons/svg')) {
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while (false !== ($file = readdir($dh))) {
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if (preg_match('/(.*?)\.svg$/i', $file, $match)) {
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$exts[] = strtolower($match[1]);
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}
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}
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closedir($dh);
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}
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foreach ($exts as $ext) {
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$class = preg_replace('/[^_\-a-z0-9]+/', '_', $ext);
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echo ".mf_$class {";
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echo ' background-image: url(' . DOKU_BASE . 'lib/images/fileicons/svg/' . $ext . '.svg)';
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echo '}';
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}
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}
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/**
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* Loads a given file and fixes relative URLs with the
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* given location prefix
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*
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* @param string $file file system path
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* @param string $location
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* @return string
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*/
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function css_loadfile($file, $location = '')
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{
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$css_file = new DokuCssFile($file);
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return $css_file->load($location);
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}
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/**
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* Helper class to abstract loading of css/less files
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*
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* @author Chris Smith <chris@jalakai.co.uk>
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*/
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class DokuCssFile
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{
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protected $filepath; // file system path to the CSS/Less file
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protected $location; // base url location of the CSS/Less file
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protected $relative_path;
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public function __construct($file)
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{
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$this->filepath = $file;
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}
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/**
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* Load the contents of the css/less file and adjust any relative paths/urls (relative to this file) to be
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* relative to the dokuwiki root: the web root (DOKU_BASE) for most files; the file system root (DOKU_INC)
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* for less files.
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*
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* @param string $location base url for this file
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* @return string the CSS/Less contents of the file
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*/
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public function load($location = '')
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{
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if (!file_exists($this->filepath)) return '';
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$css = io_readFile($this->filepath);
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if (!$location) return $css;
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$this->location = $location;
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$css = preg_replace_callback('#(url\( *)([\'"]?)(.*?)(\2)( *\))#', [$this, 'replacements'], $css);
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$css = preg_replace_callback('#(@import\s+)([\'"])(.*?)(\2)#', [$this, 'replacements'], $css);
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return $css;
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}
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/**
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* Get the relative file system path of this file, relative to dokuwiki's root folder, DOKU_INC
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*
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* @return string relative file system path
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*/
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protected function getRelativePath()
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{
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if (is_null($this->relative_path)) {
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$basedir = [DOKU_INC];
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// during testing, files may be found relative to a second base dir, TMP_DIR
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if (defined('DOKU_UNITTEST')) {
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$basedir[] = realpath(TMP_DIR);
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}
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$basedir = array_map('preg_quote_cb', $basedir);
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$regex = '/^(' . implode('|', $basedir) . ')/';
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$this->relative_path = preg_replace($regex, '', dirname($this->filepath));
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}
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return $this->relative_path;
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}
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/**
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* preg_replace callback to adjust relative urls from relative to this file to relative
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* to the appropriate dokuwiki root location as described in the code
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*
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* @param array $match see http://php.net/preg_replace_callback
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* @return string see http://php.net/preg_replace_callback
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*/
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public function replacements($match)
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{
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if (preg_match('#^(/|data:|https?://)#', $match[3])) { // not a relative url? - no adjustment required
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return $match[0];
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} elseif (str_ends_with($match[3], '.less')) { // a less file import? - requires a file system location
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if ($match[3][0] != '/') {
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$match[3] = $this->getRelativePath() . '/' . $match[3];
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}
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} else { // everything else requires a url adjustment
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$match[3] = $this->location . $match[3];
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}
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return implode('', array_slice($match, 1));
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}
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}
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/**
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* Convert local image URLs to data URLs if the filesize is small
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*
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* Callback for preg_replace_callback
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*
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* @param array $match
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* @return string
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*/
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function css_datauri($match)
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{
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global $conf;
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$pre = unslash($match[1]);
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$base = unslash($match[2]);
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$url = unslash($match[3]);
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$ext = unslash($match[4]);
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$local = DOKU_INC . $url;
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$size = @filesize($local);
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if ($size && $size < $conf['cssdatauri']) {
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|
$data = base64_encode(file_get_contents($local));
|
|
}
|
|
if (!empty($data)) {
|
|
$url = 'data:image/' . $ext . ';base64,' . $data;
|
|
} else {
|
|
$url = $base . $url;
|
|
}
|
|
return $pre . $url;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns a list of possible Plugin Styles (no existance check here)
|
|
*
|
|
* @param string $mediatype
|
|
* @return array
|
|
* @author Andreas Gohr <andi@splitbrain.org>
|
|
*
|
|
*/
|
|
function css_pluginstyles($mediatype = 'screen')
|
|
{
|
|
$list = [];
|
|
$plugins = plugin_list();
|
|
foreach ($plugins as $p) {
|
|
$list[DOKU_PLUGIN . "$p/$mediatype.css"] = DOKU_BASE . "lib/plugins/$p/";
|
|
$list[DOKU_PLUGIN . "$p/$mediatype.less"] = DOKU_BASE . "lib/plugins/$p/";
|
|
// alternative for screen.css
|
|
if ($mediatype == 'screen') {
|
|
$list[DOKU_PLUGIN . "$p/style.css"] = DOKU_BASE . "lib/plugins/$p/";
|
|
$list[DOKU_PLUGIN . "$p/style.less"] = DOKU_BASE . "lib/plugins/$p/";
|
|
}
|
|
}
|
|
return $list;
|
|
}
|
|
|
|
/**
|
|
* Very simple CSS optimizer
|
|
*
|
|
* @param string $css
|
|
* @return string
|
|
* @author Andreas Gohr <andi@splitbrain.org>
|
|
*
|
|
*/
|
|
function css_compress($css)
|
|
{
|
|
// replace quoted strings with placeholder
|
|
$quote_storage = [];
|
|
|
|
$quote_cb = function ($match) use (&$quote_storage) {
|
|
$quote_storage[] = $match[0];
|
|
return '"STR' . (count($quote_storage) - 1) . '"';
|
|
};
|
|
|
|
$css = preg_replace_callback('/(([\'"]).*?(?<!\\\\)\2)/', $quote_cb, $css);
|
|
|
|
// strip comments through a callback
|
|
$css = preg_replace_callback('#(/\*)(.*?)(\*/)#s', 'css_comment_cb', $css);
|
|
|
|
// strip (incorrect but common) one line comments
|
|
$css = preg_replace_callback('/^.*\/\/.*$/m', 'css_onelinecomment_cb', $css);
|
|
|
|
// strip whitespaces
|
|
$css = preg_replace('![\r\n\t ]+!', ' ', $css);
|
|
$css = preg_replace('/ ?([;,{}\/]) ?/', '\\1', $css);
|
|
$css = preg_replace('/ ?: /', ':', $css);
|
|
|
|
// number compression
|
|
$css = preg_replace(
|
|
'/([: ])0+(\.\d+?)0*((?:pt|pc|in|mm|cm|em|ex|px)\b|%)(?=[^\{]*[;\}])/',
|
|
'$1$2$3',
|
|
$css
|
|
); // "0.1em" to ".1em", "1.10em" to "1.1em"
|
|
$css = preg_replace(
|
|
'/([: ])\.(0)+((?:pt|pc|in|mm|cm|em|ex|px)\b|%)(?=[^\{]*[;\}])/',
|
|
'$1$2',
|
|
$css
|
|
); // ".0em" to "0"
|
|
$css = preg_replace(
|
|
'/([: ]0)0*(\.0*)?((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/',
|
|
'$1',
|
|
$css
|
|
); // "0.0em" to "0"
|
|
$css = preg_replace(
|
|
'/([: ]\d+)(\.0*)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/',
|
|
'$1$3',
|
|
$css
|
|
); // "1.0em" to "1em"
|
|
$css = preg_replace(
|
|
'/([: ])0+(\d+|\d*\.\d+)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/',
|
|
'$1$2$3',
|
|
$css
|
|
); // "001em" to "1em"
|
|
|
|
// shorten attributes (1em 1em 1em 1em -> 1em)
|
|
$css = preg_replace(
|
|
'/(?<![\w\-])((?:margin|padding|border|border-(?:width|radius)):)([\w\.]+)( \2)+(?=[;\}]| !)/',
|
|
'$1$2',
|
|
$css
|
|
); // "1em 1em 1em 1em" to "1em"
|
|
$css = preg_replace(
|
|
'/(?<![\w\-])((?:margin|padding|border|border-(?:width)):)([\w\.]+) ([\w\.]+) \2 \3(?=[;\}]| !)/',
|
|
'$1$2 $3',
|
|
$css
|
|
); // "1em 2em 1em 2em" to "1em 2em"
|
|
|
|
// shorten colors
|
|
$css = preg_replace(
|
|
"/#([0-9a-fA-F]{1})\\1([0-9a-fA-F]{1})\\2([0-9a-fA-F]{1})\\3(?=[^\{]*[;\}])/",
|
|
"#\\1\\2\\3",
|
|
$css
|
|
);
|
|
|
|
// replace back protected strings
|
|
$quote_back_cb = function ($match) use (&$quote_storage) {
|
|
return $quote_storage[$match[1]];
|
|
};
|
|
|
|
$css = preg_replace_callback('/"STR(\d+)"/', $quote_back_cb, $css);
|
|
$css = trim($css);
|
|
|
|
return $css;
|
|
}
|
|
|
|
/**
|
|
* Callback for css_compress()
|
|
*
|
|
* Keeps short comments (< 5 chars) to maintain typical browser hacks
|
|
*
|
|
* @param array $matches
|
|
* @return string
|
|
*
|
|
* @author Andreas Gohr <andi@splitbrain.org>
|
|
*
|
|
*/
|
|
function css_comment_cb($matches)
|
|
{
|
|
if (strlen($matches[2]) > 4) return '';
|
|
return $matches[0];
|
|
}
|
|
|
|
/**
|
|
* Callback for css_compress()
|
|
*
|
|
* Strips one line comments but makes sure it will not destroy url() constructs with slashes
|
|
*
|
|
* @param array $matches
|
|
* @return string
|
|
*/
|
|
function css_onelinecomment_cb($matches)
|
|
{
|
|
$line = $matches[0];
|
|
|
|
$i = 0;
|
|
$len = strlen($line);
|
|
|
|
while ($i < $len) {
|
|
$nextcom = strpos($line, '//', $i);
|
|
$nexturl = stripos($line, 'url(', $i);
|
|
|
|
if ($nextcom === false) {
|
|
// no more comments, we're done
|
|
$i = $len;
|
|
break;
|
|
}
|
|
|
|
if ($nexturl === false || $nextcom < $nexturl) {
|
|
// no url anymore, strip comment and be done
|
|
$i = $nextcom;
|
|
break;
|
|
}
|
|
|
|
// we have an upcoming url
|
|
$i = strpos($line, ')', $nexturl);
|
|
}
|
|
|
|
return substr($line, 0, $i);
|
|
}
|
|
|
|
//Setup VIM: ex: et ts=4 :
|