Make SotExchange::GetFormat() accept a MIME type with additional parameters

For instance, if SotExchange::GetFormat() is passed a flavor with MIME
type
"application/x-openoffice-objectdescriptor-xml;windows_formatname=\"Star
Object Descriptor (XML)\";typename=\"LibreOffice 7.2 Spreadsheet\"" we
do want to recognize it as SotClipboardFormatId::OBJECTDESCRIPTOR,
even if the MIME type in the entry for it in the array in
ImplFormatArray_Impl only has the windows_formatname parameter.

This is part of fixing
https://github.com/CollaboraOnline/online/issues/849, but it will help
for corresponding problems with LibreOffice on macOS, too.

Note that on Linux, SotExchange::GetFormat() gets called with a flavor
with a MIME type that does *not* have all the extra parameters
(classname, typename, displayname, viewaspect, width, height, posx,
posy) (See the GitHub issue mentioned above.) This change does not
remove any checks for classname, typename, etc. There are/were no such
checks in SotExchange::GetFormat().

But, in the (much different) code path for macOS (and iOS), with my
work in process in vcl, SotExchange::GetFormat() gets called with a
flavor with a MIME type that *does* contain those extra parameters. I
don't see the point in introducing checks of the "sanity" of those
into SotExchange::GetFormat().

Change-Id: Ie65ed1ab922cdaa6557eb65d980b9e886d3c6971
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/109254
Tested-by: Jenkins
Reviewed-by: Tor Lillqvist <tml@collabora.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/sot/source/base/exchange.cxx b/sot/source/base/exchange.cxx
index ff7b8add31bd..84a2427d334b 100644
--- a/sot/source/base/exchange.cxx
+++ b/sot/source/base/exchange.cxx
@@ -439,10 +439,16 @@ SotClipboardFormatId SotExchange::GetFormat( const DataFlavor& rFlavor )
     // only into 5.1 chart documents - in 5.0 and 5.2 it was 42 ("StarChart 5.0")
     // The registry only contains the entry for the 42 format id.
     for( SotClipboardFormatId i = SotClipboardFormatId::RTF; i <= SotClipboardFormatId::USER_END;  ++i )
-        if( rMimeType.equalsAscii( pFormatArray_Impl[ static_cast<int>(i) ].pMimeType ) )
+    {
+        const char* const pFormatMimeType = pFormatArray_Impl[ static_cast<int>(i) ].pMimeType;
+        const sal_Int32 nFormatMimeTypeLen = rtl_str_getLength( pFormatMimeType );
+        if( rMimeType.startsWithAsciiL( pFormatMimeType, nFormatMimeTypeLen ) &&
+            ( rMimeType.getLength() == nFormatMimeTypeLen ||
+              rMimeType[ nFormatMimeTypeLen ] == ';' ) )
             return ( (i == SotClipboardFormatId::STARCHARTDOCUMENT_50)
                      ? SotClipboardFormatId::STARCHART_50
                      : i );
+    }
 
     // then in the dynamic list
     tDataFlavorList& rL = InitFormats_Impl();