MainWorkflow: Provide an unlink action & the associated command

src/Commands/Commands.cpp

@@ -380,6 +380,37 @@ Commands::Clip::Link::internalUndo()
         invalidate();
 }
 
+Commands::Clip::Unlink::Unlink( std::shared_ptr<SequenceWorkflow> const& workflow,
+                            const QUuid& clipA, const QUuid& clipB )
+    : m_workflow( workflow )
+    , m_clipA( clipA )
+    , m_clipB( clipB )
+{
+    retranslate();
+}
+
+void
+Commands::Clip::Unlink::retranslate()
+{
+    setText( tr( "Unlinking clips" ) );
+}
+
+void
+Commands::Clip::Unlink::internalRedo()
+{
+    auto ret = m_workflow->unlinkClips( m_clipA, m_clipB );
+    if ( ret == false )
+        invalidate();
+}
+
+void
+Commands::Clip::Unlink::internalUndo()
+{
+    auto ret = m_workflow->linkClips( m_clipA, m_clipB );
+    if ( ret == false )
+        invalidate();
+}
+
 Commands::Effect::Add::Add( std::shared_ptr<EffectHelper> const& helper, Backend::IInput* target )
     : m_helper( helper )
     , m_target( target )

src/Commands/Commands.h

@@ -197,6 +197,20 @@ namespace Commands
                 QUuid     m_clipA;
                 QUuid     m_clipB;
         };
+
+        class   Unlink : public Generic
+        {
+            public:
+                Unlink( std::shared_ptr<SequenceWorkflow> const& workflow,
+                      const QUuid& clipA, const QUuid& clipB );
+                virtual void    internalRedo();
+                virtual void    internalUndo();
+                virtual void    retranslate();
+            private:
+                std::shared_ptr<SequenceWorkflow> m_workflow;
+                QUuid     m_clipA;
+                QUuid     m_clipB;
+        };
     }
     namespace   Effect
     {

src/Workflow/MainWorkflow.cpp

@@ -281,6 +281,12 @@ MainWorkflow::linkClips( const QString& uuidA, const QString& uuidB )
     trigger( new Commands::Clip::Link( m_sequenceWorkflow, uuidA, uuidB ) );
 }
 
+void
+MainWorkflow::unlinkClips( const QString& uuidA, const QString& uuidB )
+{
+    trigger( new Commands::Clip::Unlink( m_sequenceWorkflow, uuidA, uuidB ) );
+}
+
 QString
 MainWorkflow::addEffect( const QString &clipUuid, const QString &effectId )
 {

src/Workflow/MainWorkflow.h

@@ -152,6 +152,9 @@ class   MainWorkflow : public QObject
         Q_INVOKABLE
         void                    linkClips( const QString& uuidA, const QString& uuidB );
 
+        Q_INVOKABLE
+        void                    unlinkClips( const QString& uuidA, const QString& uuidB );
+
         Q_INVOKABLE
         QString                 addEffect( const QString& clipUuid, const QString& effectId );