From fffb23cd12ed25c1a3ffcd632e8b99b5ec3a6dbc Mon Sep 17 00:00:00 2001
From: Michael Sippel <micha@fragmental.art>
Date: Sun, 17 Jan 2021 11:17:59 +0100
Subject: [PATCH] add to_sequence() in ViewPort<Vec>

---
 src/main.rs                |  8 +++-----
 src/sequence/vec_buffer.rs | 12 +++++++++++-
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 7b858a4..076bd31 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -78,11 +78,9 @@ async fn main() {
         let vec_port = ViewPort::new();
         let mut vec_buf = sequence::VecBuffer::<char>::new(vec_port.inner());
 
-        // project Vec-Buffer to SequenceView
-        let vec_seq_port = ViewPort::new();
-        let vec_seq = sequence::VecSequence::new(vec_seq_port.inner());
-        vec_port.add_observer(vec_seq.clone());
-        let vec_term_view = vec_seq_port.outer()
+        // project Vec-Buffer
+        let vec_term_view = vec_port.outer()
+            .to_sequence()
             .to_index()
             .map_key(
                 |idx: &usize| Point2::<i16>::new(*idx as i16, 0),
diff --git a/src/sequence/vec_buffer.rs b/src/sequence/vec_buffer.rs
index ce6cd6f..a1c75e7 100644
--- a/src/sequence/vec_buffer.rs
+++ b/src/sequence/vec_buffer.rs
@@ -3,7 +3,7 @@ use {
         sync::{Arc, RwLock}
     },
     crate::{
-        core::{View, Observer, ObserverExt, ObserverBroadcast, InnerViewPort},
+        core::{View, Observer, ObserverExt, ObserverBroadcast, ViewPort, InnerViewPort, OuterViewPort},
         sequence::SequenceView,
     }
 };
@@ -31,6 +31,16 @@ where T: Clone + Send + Sync + 'static {
     cast: Arc<RwLock<ObserverBroadcast<dyn SequenceView<Item = T>>>>
 }
 
+impl<T> OuterViewPort<RwLock<Vec<T>>>
+where T: Clone + Send + Sync + 'static {
+    pub fn to_sequence(&self) -> OuterViewPort<dyn SequenceView<Item = T>> {
+        let port = ViewPort::new();
+        let vec_seq = VecSequence::new(port.inner());
+        self.add_observer(vec_seq.clone());
+        port.into_outer()
+    }
+}
+
 impl<T> VecSequence<T>
 where T: Clone + Send + Sync + 'static {
     pub fn new(