function for duplicated code

Change-Id: If9d6a163abb5a1cbd64838ca005b14dcd51c4588

2 files changed, 56 insertions, 0 deletions

diff --git a/vcl/inc/vcl/embeddedfontshelper.hxx b/vcl/inc/vcl/embeddedfontshelper.hxx
index ac4778620361..e5aead64c7bd 100644
--- a/vcl/inc/vcl/embeddedfontshelper.hxx
+++ b/vcl/inc/vcl/embeddedfontshelper.hxx
@@ -12,8 +12,11 @@
 
 #include <vcl/dllapi.h>
 
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/uno/Reference.hxx>
 #include <rtl/ustring.hxx>
 #include <tools/fontenum.hxx>
+#include <vector>
 
 /**
  Helper functions for handling embedded fonts in documents.
@@ -27,6 +30,18 @@ public:
     */
     static OUString fontFileUrl( const OUString& familyName, FontFamily family, FontItalic italic,
         FontWeight weight, FontPitch pitch, rtl_TextEncoding encoding );
+
+    /**
+      Reads a font from the input stream, saves it to a temporary font file and activates the font.
+      @param stream stream of font data
+      @param fontName name of the font (e.g. 'Times New Roman')
+      @param extra additional text to use for name (e.g. to distinguish regular from bold, italic,...), "?" for unique
+      @param key key to xor the data with, from the start until the key's length (not repeated)
+    */
+    static bool addEmbeddedFont( com::sun::star::uno::Reference< com::sun::star::io::XInputStream > stream,
+        const OUString& fontName, const char* extra,
+        std::vector< unsigned char > key = std::vector< unsigned char >());
+
     /**
       Returns an URL for a file where to store contents of a given temporary font.
       The file may or not may not exist yet, and will be cleaned up automatically as appropriate.
diff --git a/vcl/source/gdi/embeddedfontshelper.cxx b/vcl/source/gdi/embeddedfontshelper.cxx
index e53ed1847133..5df758da0f04 100644
--- a/vcl/source/gdi/embeddedfontshelper.cxx
+++ b/vcl/source/gdi/embeddedfontshelper.cxx
@@ -21,6 +21,7 @@
 #include <outfont.hxx>
 #include <salgdi.hxx>
 
+using namespace com::sun::star;
 using namespace vcl;
 
 static void clearDir( const OUString& path )
@@ -49,6 +50,46 @@ void EmbeddedFontsHelper::clearTemporaryFontFiles()
     clearDir( path + "fromsystem/" );
 }
 
+bool EmbeddedFontsHelper::addEmbeddedFont( uno::Reference< io::XInputStream > stream, const OUString& fontName,
+    const char* extra, std::vector< unsigned char > key )
+{
+    OUString fileUrl = EmbeddedFontsHelper::fileUrlForTemporaryFont( fontName, extra );
+    osl::File file( fileUrl );
+    switch( file.open( osl_File_OpenFlag_Create | osl_File_OpenFlag_Write ))
+    {
+        case osl::File::E_None:
+            break; // ok
+        case osl::File::E_EXIST:
+            return true; // Assume it's already been added correctly.
+        default:
+            SAL_WARN( "vcl.fonts", "Cannot open file for temporary font" );
+            return false;
+    }
+    size_t keyPos = 0;
+    for(;;)
+    {
+        uno::Sequence< sal_Int8 > buffer;
+        int read = stream->readBytes( buffer, 1024 );
+        for( int pos = 0;
+             pos < read && keyPos < key.size();
+             ++pos )
+            buffer[ pos ] ^= key[ keyPos++ ];
+        sal_uInt64 dummy;
+        if( read > 0 )
+            file.write( buffer.getConstArray(), read, dummy );
+        if( read < 1024 )
+            break;
+    }
+    if( file.close() != osl::File::E_None )
+    {
+        SAL_WARN( "vcl.fonts", "Writing temporary font file failed" );
+        osl::File::remove( fileUrl );
+        return false;
+    }
+    EmbeddedFontsHelper::activateFont( fontName, fileUrl );
+    return true;
+}
+
 OUString EmbeddedFontsHelper::fileUrlForTemporaryFont( const OUString& fontName, const char* extra )
 {
     OUString path = "${$BRAND_BASE_DIR/program/" SAL_CONFIGFILE( "bootstrap") "::UserInstallation}";