1 files changed, 138 insertions, 0 deletions
diff --git a/www/wiki/extensions/Translate/utils/Font.php b/www/wiki/extensions/Translate/utils/Font.php
new file mode 100644
index 00000000..37fa4ac7
--- /dev/null
+++ b/www/wiki/extensions/Translate/utils/Font.php
@@ -0,0 +1,138 @@
+<?php
+/**
+ * Contains class with wrapper around font-config.
+ *
+ * @author Niklas Laxström
+ * @author Harry Burt
+ * @license Unlicense
+ * @file
+ */
+
+/**
+ * Wrapper around font-config to get useful ttf font given a language code.
+ * Uses wfShellExec, wfEscapeShellArg and wfDebugLog, wfGetCache and
+ * wfMemckey from %MediaWiki.
+ *
+ * @ingroup Stats
+ */
+class FCFontFinder {
+	/**
+	 * Searches for suitable font in the system.
+	 * @param string $code Language code.
+	 * @return bool|string Full path to the font file, false on failure
+	 */
+	public static function findFile( $code ) {
+		$data = self::callFontConfig( $code );
+		if ( is_array( $data ) ) {
+			return $data['file'];
+		}
+
+		return false;
+	}
+
+	/**
+	 * Searches for suitable font family in the system.
+	 * @param string $code Language code.
+	 * @return bool|string Name of font family, false on failure
+	 */
+	public static function findFamily( $code ) {
+		$data = self::callFontConfig( $code );
+		if ( is_array( $data ) ) {
+			return $data['family'];
+		}
+
+		return false;
+	}
+
+	protected static function callFontConfig( $code ) {
+		if ( ini_get( 'open_basedir' ) ) {
+			wfDebugLog( 'fcfont', 'Disabled because of open_basedir is active' );
+
+			// Most likely we can't access any fonts we might find
+			return false;
+		}
+
+		$cache = self::getCache();
+		$cachekey = wfMemcKey( 'fcfont', $code );
+		$timeout = 60 * 60 * 12;
+
+		$cached = $cache->get( $cachekey );
+		if ( is_array( $cached ) ) {
+			return $cached;
+		} elseif ( $cached === 'NEGATIVE' ) {
+			return false;
+		}
+
+		$code = wfEscapeShellArg( ":lang=$code" );
+		$ok = 0;
+		$cmd = "fc-match $code";
+		$suggestion = wfShellExec( $cmd, $ok );
+
+		wfDebugLog( 'fcfont', "$cmd returned $ok" );
+
+		if ( $ok !== 0 ) {
+			wfDebugLog( 'fcfont', "fc-match error output: $suggestion" );
+			$cache->set( $cachekey, 'NEGATIVE', $timeout );
+
+			return false;
+		}
+
+		$pattern = '/^(.*?): "(.*)" "(.*)"$/';
+		$matches = [];
+
+		if ( !preg_match( $pattern, $suggestion, $matches ) ) {
+			wfDebugLog( 'fcfont', "fc-match: return format not understood: $suggestion" );
+			$cache->set( $cachekey, 'NEGATIVE', $timeout );
+
+			return false;
+		}
+
+		list( , $file, $family, $type ) = $matches;
+		wfDebugLog( 'fcfont', "fc-match: got $file: $family $type" );
+
+		$file = wfEscapeShellArg( $file );
+		$family = wfEscapeShellArg( $family );
+		$type = wfEscapeShellArg( $type );
+		$cmd = "fc-list $family $type $code file | grep $file";
+
+		$candidates = trim( wfShellExec( $cmd, $ok ) );
+
+		wfDebugLog( 'fcfont', "$cmd returned $ok" );
+
+		if ( $ok !== 0 ) {
+			wfDebugLog( 'fcfont', "fc-list error output: $candidates" );
+			$cache->set( $cachekey, 'NEGATIVE', $timeout );
+
+			return false;
+		}
+
+		# trim spaces
+		$files = array_map( 'trim', explode( "\n", $candidates ) );
+		$count = count( $files );
+		if ( !$count ) {
+			wfDebugLog( 'fcfont', "fc-list got zero canditates: $candidates" );
+		}
+
+		# remove the trailing ":"
+		$chosen = substr( $files[0], 0, -1 );
+
+		wfDebugLog( 'fcfont', "fc-list got $count candidates; using $chosen" );
+
+		$data = [
+			'family' => $family,
+			'type' => $type,
+			'file' => $chosen,
+		];
+
+		$cache->set( $cachekey, $data, $timeout );
+
+		return $data;
+	}
+
+	/**
+	 * @return BagOStuff
+	 */
+	protected static function getCache() {
+		return wfGetCache( CACHE_ANYTHING );
+	}
+}