lok: notify clients of clipboard changes

Change-Id: I93d8eacc0defb1176ec5d767f49356812cf90ff6
Reviewed-on: https://gerrit.libreoffice.org/50327Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>

include/LibreOfficeKit/LibreOfficeKitEnums.h

@@ -568,6 +568,17 @@ typedef enum
      * - "close" - window is closed
      */
     LOK_CALLBACK_WINDOW = 36,
+
+    /**
+     * Notification that the clipboard contents have changed.
+     * Typically fired in response to copying to clipboard.
+     *
+     * The payload currently is empty and it's up to the
+     * client to get the contents, if necessary. However,
+     * in the future the contents might be included for
+     * convenience.
+     */
+    LOK_CALLBACK_CLIPBOARD_CHANGED = 37,
 }
 LibreOfficeKitCallbackType;
 

sfx2/source/view/viewsh.cxx

@@ -156,12 +156,18 @@ SfxClipboardChangeListener::SfxClipboardChangeListener( SfxViewShell* pView, con
 void SfxClipboardChangeListener::ChangedContents()
 {
     const SolarMutexGuard aGuard;
-    if( m_pViewShell )
+    if (m_pViewShell)
     {
         SfxBindings& rBind = m_pViewShell->GetViewFrame()->GetBindings();
-        rBind.Invalidate( SID_PASTE );
-        rBind.Invalidate( SID_PASTE_SPECIAL );
-        rBind.Invalidate( SID_CLIPBOARD_FORMAT_ITEMS );
+        rBind.Invalidate(SID_PASTE);
+        rBind.Invalidate(SID_PASTE_SPECIAL);
+        rBind.Invalidate(SID_CLIPBOARD_FORMAT_ITEMS);
+
+        if (comphelper::LibreOfficeKit::isActive())
+        {
+            // In the future we might send the payload as well.
+            SfxLokHelper::notifyAllViews(LOK_CALLBACK_CLIPBOARD_CHANGED, "");
+        }
     }
 }
 
@@ -823,7 +829,7 @@ SfxInPlaceClient* SfxViewShell::GetUIActiveClient() const
     if ( !pClients )
         return nullptr;
 
-    bool bIsTiledRendering = comphelper::LibreOfficeKit::isActive();
+    const bool bIsTiledRendering = comphelper::LibreOfficeKit::isActive();
 
     for (SfxInPlaceClient* pIPClient : *pClients)
     {