tdf#113696 Add mimetype to image element

Otherwise browsers don't recognize base64 encoded svg files.

Change-Id: I54d0b87c52a1ca9da1d820751ae32159b88ed28f
Reviewed-on: https://gerrit.libreoffice.org/45528
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
(cherry picked from commit 32efde5cef2b8516a9decd0bf7091d7def1da971)
Reviewed-on: https://gerrit.libreoffice.org/45674

1 files changed, 54 insertions, 0 deletions

diff --git a/comphelper/source/misc/graphicmimetype.cxx b/comphelper/source/misc/graphicmimetype.cxx
index f8eeb3e92de5..bf88312304b1 100644
--- a/comphelper/source/misc/graphicmimetype.cxx
+++ b/comphelper/source/misc/graphicmimetype.cxx
@@ -19,6 +19,22 @@
 
 #include <comphelper/graphicmimetype.hxx>
 
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/graphic/GraphicProvider.hpp>
+#include <com/sun/star/graphic/XGraphicProvider.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/graphic/XGraphic.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+
+#include <comphelper/processfactory.hxx>
+
+using namespace css;
+using namespace css::beans;
+using namespace css::graphic;
+using namespace css::io;
+using namespace css::uno;
+
 namespace comphelper
 {
 OUString GraphicMimeTypeHelper::GetMimeTypeForExtension(const OString& rExt)
@@ -47,5 +63,43 @@ OUString GraphicMimeTypeHelper::GetMimeTypeForExtension(const OString& rExt)
 
     return aMimeType;
 }
+
+OUString GraphicMimeTypeHelper::GetMimeTypeForXGraphic(Reference<XGraphic> xGraphic)
+{
+    OUString aSourceMimeType;
+    Reference<XPropertySet> const xGraphicPropertySet(xGraphic, UNO_QUERY);
+    if (xGraphicPropertySet.is() && // it's null if it's an external link
+        (xGraphicPropertySet->getPropertyValue("MimeType") >>= aSourceMimeType))
+    {
+        return aSourceMimeType;
+    }
+    return OUString("");
+}
+
+OUString GraphicMimeTypeHelper::GetMimeTypeForImageUrl(const OUString& rImageUrl)
+{
+    // Create the graphic to retrieve the mimetype from it
+    Reference<XGraphicProvider> xProvider
+        = css::graphic::GraphicProvider::create(comphelper::getProcessComponentContext());
+    Sequence<PropertyValue> aMediaProperties(1);
+    aMediaProperties[0].Name = "URL";
+    aMediaProperties[0].Value <<= rImageUrl;
+    Reference<XGraphic> xGraphic(xProvider->queryGraphic(aMediaProperties));
+
+    return GetMimeTypeForXGraphic(xGraphic);
+}
+
+OUString GraphicMimeTypeHelper::GetMimeTypeForImageStream(Reference<XInputStream> xInputStream)
+{
+    // Create the graphic to retrieve the mimetype from it
+    Reference<XGraphicProvider> xProvider
+        = css::graphic::GraphicProvider::create(comphelper::getProcessComponentContext());
+    Sequence<PropertyValue> aMediaProperties(1);
+    aMediaProperties[0].Name = "InputStream";
+    aMediaProperties[0].Value <<= xInputStream;
+    Reference<XGraphic> xGraphic(xProvider->queryGraphic(aMediaProperties));
+
+    return GetMimeTypeForXGraphic(xGraphic);
+}
 }
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