sfx2: introduce a new .uno:SignPDF

It's similar to File -> Open, but the file picker only offers PDF files
in this case, and the import is read-only -- i.e. it's the import
equivalent of .uno:ExportToPDF.

Change-Id: I7be9d6711e0ea93643e538575c0604d41cff9b26

6 files changed, 58 insertions, 6 deletions

diff --git a/sfx2/sdi/docslots.sdi b/sfx2/sdi/docslots.sdi
index 8a54a6c689a5..18bd74133624 100644
--- a/sfx2/sdi/docslots.sdi
+++ b/sfx2/sdi/docslots.sdi
@@ -30,6 +30,10 @@ interface Documents
     [
         ExecMethod = OpenRemoteExec_Impl ;
     ]
+    SID_SIGNPDF
+    [
+        ExecMethod = SignPDFExec_Impl ;
+    ]
     SID_OPENHYPERLINK // ole(no) api(final/play/rec)
     [
         ExecMethod = OpenDocExec_Impl ;
diff --git a/sfx2/sdi/sfx.sdi b/sfx2/sdi/sfx.sdi
index e45cf6da194c..dda5c788c5e5 100644
--- a/sfx2/sdi/sfx.sdi
+++ b/sfx2/sdi/sfx.sdi
@@ -2826,6 +2826,24 @@ SfxObjectItem OpenRemote SID_OPENREMOTE
     GroupId = GID_APPLICATION;
 ]
 
+SfxObjectItem SignPDF SID_SIGNPDF
+(SfxStringItem URL SID_FILE_NAME,SfxStringItem FilterName SID_FILTER_NAME,SfxStringItem OpenFlags SID_OPTIONS,SfxStringItem Password SID_PASSWORD,SfxStringItem FilterOptions SID_FILE_FILTEROPTIONS,SfxInt16Item Version SID_VERSION,SfxStringItem Referer SID_REFERER,SfxStringItem SuggestedSaveAsDir SID_DEFAULTFILEPATH,SfxStringItem SuggestedSaveAsName SID_DEFAULTFILENAME)
+[
+    AutoUpdate = FALSE,
+    FastCall = FALSE,
+    ReadOnlyDoc = TRUE,
+    Toggle = FALSE,
+    Container = TRUE,
+    RecordAbsolute = FALSE,
+    RecordPerSet;
+    Asynchron;
+
+    AccelConfig = TRUE,
+    MenuConfig = TRUE,
+    ToolBoxConfig = TRUE,
+    GroupId = GID_APPLICATION;
+]
+
 SfxObjectItem WebHtml SID_WEBHTML
 ()
 [
diff --git a/sfx2/source/appl/app.src b/sfx2/source/appl/app.src
index 3384f4a5a677..21c5f9175f2e 100644
--- a/sfx2/source/appl/app.src
+++ b/sfx2/source/appl/app.src
@@ -333,6 +333,10 @@ String STR_SFX_FILTERNAME_ALL
 {
     Text [ en-US ] = "All files" ;
 };
+String STR_SFX_FILTERNAME_PDF
+{
+    Text [ en-US ] = "PDF files" ;
+};
 String RID_SVXSTR_EDITGRFLINK
 {
     Text [ en-US ] = "Link Image" ;
diff --git a/sfx2/source/appl/appopen.cxx b/sfx2/source/appl/appopen.cxx
index 5b0fddd80e78..caec98f9e705 100644
--- a/sfx2/source/appl/appopen.cxx
+++ b/sfx2/source/appl/appopen.cxx
@@ -624,6 +624,15 @@ void SfxApplication::OpenDocExec_Impl( SfxRequest& rReq )
         if ( pRemoteDialogItem && pRemoteDialogItem->GetValue())
             nDialog = SFX2_IMPL_DIALOG_REMOTE;
 
+        sal_Int16 nDialogType = ui::dialogs::TemplateDescription::FILEOPEN_READONLY_VERSION;
+        FileDialogFlags eDialogFlags = FileDialogFlags::MultiSelection;
+        const SfxBoolItem* pSignPDFItem = rReq.GetArg<SfxBoolItem>(SID_SIGNPDF);
+        if (pSignPDFItem && pSignPDFItem->GetValue())
+        {
+            eDialogFlags |= FileDialogFlags::SignPDF;
+            nDialogType = ui::dialogs::TemplateDescription::FILEOPEN_SIMPLE;
+        }
+
         OUString sStandardDir;
 
         const SfxStringItem* pStandardDirItem = rReq.GetArg<SfxStringItem>(SID_STANDARD_DIR);
@@ -638,8 +647,8 @@ void SfxApplication::OpenDocExec_Impl( SfxRequest& rReq )
 
 
         sal_uIntPtr nErr = sfx2::FileOpenDialog_Impl(
-                ui::dialogs::TemplateDescription::FILEOPEN_READONLY_VERSION,
-                FileDialogFlags::MultiSelection, OUString(), aURLList,
+                nDialogType,
+                eDialogFlags, OUString(), aURLList,
                 aFilter, pSet, &aPath, nDialog, sStandardDir, aBlackList );
 
         if ( nErr == ERRCODE_ABORT )
@@ -1127,4 +1136,10 @@ void SfxApplication::OpenRemoteExec_Impl( SfxRequest& rReq )
     GetDispatcher_Impl()->Execute( SID_OPENDOC, SfxCallMode::SYNCHRON, *rReq.GetArgs() );
 }
 
+void SfxApplication::SignPDFExec_Impl(SfxRequest& rReq)
+{
+    rReq.AppendItem(SfxBoolItem(SID_SIGNPDF, true));
+    GetDispatcher_Impl()->Execute(SID_OPENDOC, SfxCallMode::SYNCHRON, *rReq.GetArgs());
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sfx2/source/dialog/filedlghelper.cxx b/sfx2/source/dialog/filedlghelper.cxx
index 7771124e98a8..c54a0df748a4 100644
--- a/sfx2/source/dialog/filedlghelper.cxx
+++ b/sfx2/source/dialog/filedlghelper.cxx
@@ -2593,16 +2593,24 @@ ErrCode FileOpenDialog_Impl( sal_Int16 nDialogType,
                              const css::uno::Sequence< OUString >& rBlackList )
 {
     ErrCode nRet;
-    FileDialogHelper aDialog( nDialogType, nFlags,
-            rFact, nDialog, SfxFilterFlags::NONE, SfxFilterFlags::NONE, rStandardDir, rBlackList );
+    std::unique_ptr<FileDialogHelper> pDialog;
+    // Sign existing PDF: only works with PDF files and they are opened
+    // read-only to discourage editing (which would invalidate existing
+    // signatures).
+    if (nFlags & FileDialogFlags::SignPDF)
+        pDialog.reset(new FileDialogHelper(nDialogType, nFlags, SfxResId(STR_SFX_FILTERNAME_PDF).toString(), "pdf", rStandardDir, rBlackList));
+    else
+        pDialog.reset(new FileDialogHelper(nDialogType, nFlags, rFact, nDialog, SfxFilterFlags::NONE, SfxFilterFlags::NONE, rStandardDir, rBlackList));
 
     OUString aPath;
     if ( pPath )
         aPath = *pPath;
 
-    nRet = aDialog.Execute( rpURLList, rpSet, rFilter, aPath );
+    nRet = pDialog->Execute(rpURLList, rpSet, rFilter, aPath);
     DBG_ASSERT( rFilter.indexOf(": ") == -1, "Old filter name used!");
 
+    if (rpSet && nFlags & FileDialogFlags::SignPDF)
+        rpSet->Put(SfxBoolItem(SID_DOC_READONLY, true));
     return nRet;
 }
 
diff --git a/sfx2/source/doc/docfile.cxx b/sfx2/source/doc/docfile.cxx
index 40f19ea74583..0a4f02e0374b 100644
--- a/sfx2/source/doc/docfile.cxx
+++ b/sfx2/source/doc/docfile.cxx
@@ -3502,7 +3502,10 @@ bool SfxMedium::SignContents_Impl( bool bScriptingContent, const OUString& aODFV
                 comphelper::getProcessComponentContext(), aODFVersion, bHasValidDocumentSignature ) );
 
         uno::Reference< embed::XStorage > xWriteableZipStor;
-        if ( !IsReadOnly() )
+        // Signing is not modification of the document, as seen by the user
+        // ("only a saved document can be signed"). So allow signing in the
+        // "opened read-only, but not physically-read-only" case.
+        if (!IsOriginallyReadOnly())
         {
             // we can reuse the temporary file if there is one already
             CreateTempFile( false );