cache: add passthroughs to allow shallow copies of data

app/widget/timelinewidget/tool/pointer.cpp

@@ -698,8 +698,7 @@ void PointerTool::FinishDrag(TimelineViewMouseEvent *event)
         // Place the copy instead of the original block
         block = static_cast<Block*>(Node::CopyNodeInGraph(block, command));
         if (ClipBlock *new_clip = dynamic_cast<ClipBlock*>(block)) {
-          qDebug() << "FIXME: Copy clip stub"; Q_UNUSED(new_clip)
-          //new_clip->set_waveform(static_cast<ClipBlock*>(p.block)->waveform());
+          new_clip->AddCachePassthroughFrom(static_cast<ClipBlock*>(p.block));
         }
       }
 

app/widget/timelinewidget/undo/timelineundosplit.cpp

@@ -29,27 +29,20 @@ namespace olive {
 //
 // BlockSplitCommand
 //
+void BlockSplitCommand::prepare()
+{
+  reconnect_tree_command_ = new MultiUndoCommand();
+  new_block_ = static_cast<Block*>(Node::CopyNodeInGraph(block_, reconnect_tree_command_));
+}
+
 void BlockSplitCommand::redo()
 {
   old_length_ = block_->length();
 
   Q_ASSERT(point_ > block_->in() && point_ < block_->out());
 
-  if (!reconnect_tree_command_) {
-    reconnect_tree_command_ = new MultiUndoCommand();
-    new_block_ = static_cast<Block*>(Node::CopyNodeInGraph(block_, reconnect_tree_command_));
-  }
-
   reconnect_tree_command_->redo_now();
 
-  if (ClipBlock *new_clip = dynamic_cast<ClipBlock*>(new_block_)) {
-    ClipBlock *old_clip = static_cast<ClipBlock*>(block_);
-    qDebug() << "FIXME: Copy waveform stub";
-    Q_UNUSED(old_clip)
-    Q_UNUSED(new_clip)
-    //new_clip->set_waveform(old_clip->waveform());
-  }
-
   // Determine our new lengths
   rational new_length = point_ - block_->in();
   rational new_part_length = block_->out() - point_;
@@ -64,6 +57,11 @@ void BlockSplitCommand::redo()
   // Insert new block
   track->InsertBlockAfter(new_block(), block_);
 
+  if (ClipBlock *new_clip = dynamic_cast<ClipBlock*>(new_block_)) {
+    ClipBlock *old_clip = static_cast<ClipBlock*>(block_);
+    new_clip->AddCachePassthroughFrom(old_clip);
+  }
+
   // If the block had an out transition, we move it to the new block
   moved_transition_ = NodeInput();
 

app/widget/timelinewidget/undo/timelineundosplit.h

@@ -54,6 +54,8 @@ public:
   }
 
 protected:
+  virtual void prepare() override;
+
   virtual void redo() override;
 
   virtual void undo() override;