From 086ae52d12011746a75f5588e877347bc0457352 Mon Sep 17 00:00:00 2001
From: Pierre Schmitz <pierre@archlinux.de>
Date: Fri, 21 Mar 2008 11:49:34 +0100
Subject: Update auf MediaWiki 1.12.0

---
 includes/XmlTypeCheck.php | 93 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 includes/XmlTypeCheck.php

(limited to 'includes/XmlTypeCheck.php')

diff --git a/includes/XmlTypeCheck.php b/includes/XmlTypeCheck.php
new file mode 100644
index 00000000..639d1f85
--- /dev/null
+++ b/includes/XmlTypeCheck.php
@@ -0,0 +1,93 @@
+<?php
+
+class XmlTypeCheck {
+	/**
+	 * Will be set to true or false to indicate whether the file is
+	 * well-formed XML. Note that this doesn't check schema validity.
+	 */
+	public $wellFormed = false;
+	
+	/**
+	 * Name of the document's root element, including any namespace
+	 * as an expanded URL.
+	 */
+	public $rootElement = '';
+	
+	private $softNamespaces;
+	private $namespaces = array();
+	
+	/**
+	 * @param $file string filename
+	 * @param $softNamespaces bool
+	 *        If set to true, use of undeclared XML namespaces will be ignored.
+	 *        This matches the behavior of rsvg, but more compliant consumers
+	 *        such as Firefox will reject such files.
+	 *        Leave off for the default, stricter checks.
+	 */
+	function __construct( $file, $softNamespaces=false ) {
+		$this->softNamespaces = $softNamespaces;
+		$this->run( $file );
+	}
+	
+	private function run( $fname ) {
+		if( $this->softNamespaces ) {
+			$parser = xml_parser_create( 'UTF-8' );
+		} else {
+			$parser = xml_parser_create_ns( 'UTF-8' );
+		}
+		
+		// case folding violates XML standard, turn it off
+		xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );
+		
+		xml_set_element_handler( $parser, array( $this, 'elementOpen' ), false );
+
+		$file = fopen( $fname, "rb" );
+		do {
+			$chunk = fread( $file, 32768 );
+			$ret = xml_parse( $parser, $chunk, feof( $file ) );
+			if( $ret == 0 ) {
+				// XML isn't well-formed!
+				fclose( $file );
+				xml_parser_free( $parser );
+				return;
+			}
+		} while( !feof( $file ) );
+		
+		$this->wellFormed = true;
+		
+		fclose( $file );
+		xml_parser_free( $parser );
+	}
+
+	private function elementOpen( $parser, $name, $attribs ) {
+		if( $this->softNamespaces ) {
+			// Check namespaces manually, so expat doesn't throw
+			// errors on use of undeclared namespaces.
+			foreach( $attribs as $attrib => $val ) {
+				if( $attrib == 'xmlns' ) {
+					$this->namespaces[''] = $val;
+				} elseif( substr( $attrib, 0, strlen( 'xmlns:' ) ) == 'xmlns:' ) {
+					$this->namespaces[substr( $attrib, strlen( 'xmlns:' ) )] = $val;
+				}
+			}
+			
+			if( strpos( $name, ':' ) === false ) {
+				$ns = '';
+				$subname = $name;
+			} else {
+				list( $ns, $subname ) = explode( ':', $name, 2 );
+			}
+			
+			if( isset( $this->namespaces[$ns] ) ) {
+				$name = $this->namespaces[$ns] . ':' . $subname;
+			} else {
+				// Technically this is invalid for XML with Namespaces.
+				// But..... we'll just let it slide in soft mode.
+			}
+		}
+		
+		// We only need the first open element
+		$this->rootElement = $name;
+		xml_set_element_handler( $parser, false, false );
+	}
+}
-- 
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