Extract list of languages svg is translated into.

[lhc/web/wiklou.git] / includes / media / SVGMetadataExtractor.php

diff --git a/includes/media/SVGMetadataExtractor.php b/includes/media/SVGMetadataExtractor.php
index db58c62..3f0edb3 100644 (file)
--- a/includes/media/SVGMetadataExtractor.php
+++ b/includes/media/SVGMetadataExtractor.php
@@ -43,6 +43,8 @@ class SVGReader {
        const DEFAULT_WIDTH = 512;
        const DEFAULT_HEIGHT = 512;
        const NS_SVG = 'http://www.w3.org/2000/svg';
+       const LANG_PREFIX_MATCH = 1;
+       const LANG_FULL_MATCH = 2;
 
        /** @var null|XMLReader */
        private $reader = null;
@@ -52,6 +54,8 @@ class SVGReader {
 
        /** @var array */
        private $metadata = array();
+       private $languages = array();
+       private $languagePrefixes = array();
 
        /**
         * Constructor
@@ -172,10 +176,8 @@ class SVGReader {
                        } elseif ( $tag !== '#text' ) {
                                $this->debug( "Unhandled top-level XML tag $tag" );
 
-                               if ( !isset( $this->metadata['animated'] ) ) {
-                                       // Recurse into children of current tag, looking for animation.
-                                       $this->animateFilter( $tag );
-                               }
+                               // Recurse into children of current tag, looking for animation and languages.
+                               $this->animateFilterAndLang( $tag );
                        }
 
                        // Goto next element, which is sibling of current (Skip children).
@@ -184,6 +186,8 @@ class SVGReader {
 
                $this->reader->close();
 
+               $this->metadata['translations'] = $this->languages + $this->languagePrefixes;
+
                return true;
        }
 
@@ -235,11 +239,12 @@ class SVGReader {
        }
 
        /**
-        * Filter all children, looking for animate elements
+        * Filter all children, looking for animated elements.
+        * Also get a list of languages that can be targeted.
         *
         * @param string $name Name of the element that we are reading from
         */
-       private function animateFilter( $name ) {
+       private function animateFilterAndLang( $name ) {
                $this->debug( "animate filter for tag $name" );
                if ( $this->reader->nodeType != XmlReader::ELEMENT ) {
                        return;
@@ -254,9 +259,35 @@ class SVGReader {
                                && $this->reader->nodeType == XmlReader::END_ELEMENT
                        ) {
                                break;
-                       } elseif ( $this->reader->namespaceURI ==
-                               self::NS_SVG && $this->reader->nodeType == XmlReader::ELEMENT
+                       } elseif ( $this->reader->namespaceURI == self::NS_SVG
+                               && $this->reader->nodeType == XmlReader::ELEMENT
                        ) {
+
+                               $sysLang = $this->reader->getAttribute( 'systemLanguage' );
+                               if ( !is_null( $sysLang ) && $sysLang !== '' ) {
+                                       // See http://www.w3.org/TR/SVG/struct.html#SystemLanguageAttribute
+                                       $langList = explode( ',', $sysLang );
+                                       foreach( $langList as $langItem ) {
+                                               $langItem = trim( $langItem );
+                                               if ( Language::isWellFormedLanguageTag( $langItem ) ) {
+                                                       $this->languages[$langItem] = self::LANG_FULL_MATCH;
+                                               }
+                                               // Note, the standard says that any prefix should work,
+                                               // here we do only the initial prefix, since that will catch
+                                               // 99% of cases, and we are going to compare against fallbacks.
+                                               // This differs mildly from how the spec says languages should be
+                                               // handled, however it matches better how the MediaWiki language
+                                               // preference is generally handled.
+                                               $dash = strpos( $langItem, '-' );
+                                               // Intentionally checking both !false and > 0 at the same time.
+                                               if ( $dash ) {
+                                                       $itemPrefix = substr( $langItem, 0, $dash );
+                                                       if ( Language::isWellFormedLanguageTag( $itemPrefix ) ) {
+                                                               $this->languagePrefixes[$itemPrefix] = self::LANG_PREFIX_MATCH;
+                                                       }
+                                               }
+                                       }
+                               }
                                switch ( $this->reader->localName ) {
                                        case 'script':
                                                // Normally we disallow files with