sw, viewing OLE objects: also protect "common" embeded objects

Commit 4f9f1ac33366817df61c488a9f36b09c592ee939 (sw: allow viewing OLE
objects in protected sections, 2021-11-25) allowed launching OLE objects
in protected sections, and then made sure that changes done in "real"
OLE editors (on Windows) are discarded: both the native data and
preview.

Extend this mechanism to also handle common embedded objects (i.e. when
we load the data into an own document model, like Calc-in-Writer on
Linux): there we can simply load the data read-only, so there will be no
need to discard anything.

This requires some way to pass down the read-only flag from sw/ to
embeddedobj, implement XInitialization on OCommonEmbeddedObject to do
that.

Change-Id: I7b32d7514a6b0a40b4f58bed57879d292daa4ed7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/125858
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

3 files changed, 32 insertions, 0 deletions

diff --git a/embeddedobj/source/commonembedding/miscobj.cxx b/embeddedobj/source/commonembedding/miscobj.cxx
index 9c24185ed184..538e0b72e3da 100644
--- a/embeddedobj/source/commonembedding/miscobj.cxx
+++ b/embeddedobj/source/commonembedding/miscobj.cxx
@@ -39,6 +39,7 @@
 #include <vcl/svapp.hxx>
 #include <tools/diagnose_ex.h>
 #include <cppuhelper/supportsservice.hxx>
+#include <comphelper/sequenceashashmap.hxx>
 
 #include "persistence.hxx"
 
@@ -398,6 +399,11 @@ uno::Any SAL_CALL OCommonEmbeddedObject::queryInterface( const uno::Type& rType
         void* p = static_cast<lang::XServiceInfo*>(this);
         return uno::Any(&p, rType);
     }
+    else if (rType == cppu::UnoType<lang::XInitialization>::get())
+    {
+        void* p = static_cast<lang::XInitialization*>(this);
+        return uno::Any(&p, rType);
+    }
     else if (rType == cppu::UnoType<lang::XTypeProvider>::get())
     {
         void* p = static_cast<lang::XTypeProvider*>(this);
@@ -671,6 +677,7 @@ uno::Sequence<uno::Type> SAL_CALL OCommonEmbeddedObject::getTypes()
         cppu::UnoType<container::XChild>::get(),
         cppu::UnoType<chart2::XDefaultSizeTransmitter>::get(),
         cppu::UnoType<lang::XServiceInfo>::get(),
+        cppu::UnoType<lang::XInitialization>::get(),
         cppu::UnoType<lang::XTypeProvider>::get(),
     };
     return aTypes;
@@ -681,4 +688,19 @@ uno::Sequence<sal_Int8> SAL_CALL OCommonEmbeddedObject::getImplementationId()
     return uno::Sequence<sal_Int8>();
 }
 
+void SAL_CALL OCommonEmbeddedObject::initialize(const uno::Sequence<uno::Any>& rArguments)
+{
+    if (!rArguments.hasElements())
+    {
+        return;
+    }
+
+    comphelper::SequenceAsHashMap aMap(rArguments[0]);
+    auto it = aMap.find("ReadOnly");
+    if (it != aMap.end())
+    {
+        it->second >>= m_bReadOnly;
+    }
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/embeddedobj/source/commonembedding/persistence.cxx b/embeddedobj/source/commonembedding/persistence.cxx
index 2ed891d33ced..faf3209e1f32 100644
--- a/embeddedobj/source/commonembedding/persistence.cxx
+++ b/embeddedobj/source/commonembedding/persistence.cxx
@@ -534,6 +534,11 @@ uno::Reference< util::XCloseable > OCommonEmbeddedObject::LoadDocumentFromStorag
         // set the document mode to embedded as the first step!!!
         EmbedAndReparentDoc_Impl( xDocument );
 
+        if (m_bReadOnly)
+        {
+            aLoadArgs.put("ReadOnly", true);
+        }
+
         if ( xDoc.is() )
         {
             xDoc->loadFromStorage( xSourceStorage, aLoadArgs.getPropertyValues() );
diff --git a/embeddedobj/source/inc/commonembobj.hxx b/embeddedobj/source/inc/commonembobj.hxx
index fab8ccbc717e..785a28eaf0fd 100644
--- a/embeddedobj/source/inc/commonembobj.hxx
+++ b/embeddedobj/source/inc/commonembobj.hxx
@@ -34,6 +34,7 @@
 #include <com/sun/star/chart2/XDefaultSizeTransmitter.hpp>
 #include <com/sun/star/io/XTempFile.hpp>
 #include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
 #include <cppuhelper/weak.hxx>
 #include <rtl/ref.hxx>
 #include <map>
@@ -81,6 +82,7 @@ class OCommonEmbeddedObject : public css::embed::XEmbeddedObject
                             , public css::container::XChild
                             , public css::chart2::XDefaultSizeTransmitter
                             , public css::lang::XServiceInfo
+                            , public css::lang::XInitialization
                             , public css::lang::XTypeProvider
                             , public ::cppu::OWeakObject
 {
@@ -408,6 +410,9 @@ public:
     sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
     css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
 
+    // XInitialization
+    void SAL_CALL initialize(const css::uno::Sequence<css::uno::Any>& rArguments) override;
+
     // XTypeProvider
     css::uno::Sequence<css::uno::Type> SAL_CALL getTypes() override;
     css::uno::Sequence<sal_Int8> SAL_CALL getImplementationId() override;