From 941da4ed7d0ac98b798e3a1756cd36aee04e3856 Mon Sep 17 00:00:00 2001
From: Michael Sippel <micha@fragmental.art>
Date: Wed, 17 Nov 2021 22:32:31 +0100
Subject: [PATCH] add grid/buffer
---
nested/src/grid/buffer.rs | 90 +++++++++++++++++++++++++++++++++++++++
1 file changed, 90 insertions(+)
create mode 100644 nested/src/grid/buffer.rs
diff --git a/nested/src/grid/buffer.rs b/nested/src/grid/buffer.rs
new file mode 100644
index 0000000..613c858
--- /dev/null
+++ b/nested/src/grid/buffer.rs
@@ -0,0 +1,90 @@
+
+use {
+ std::{
+ sync::Arc,
+ collections::HashMap,
+ hash::Hash
+ },
+ std::sync::RwLock,
+ crate::{
+ core::{
+ Observer,
+ ObserverBroadcast,
+ View,
+ InnerViewPort
+ },
+ index::{IndexArea, IndexView}
+ }
+};
+
+
+struct GridBuffer<Item> {
+ data: HashMap<Point2<i16>, Item>,
+ limit: Point2<i16>
+}
+
+impl<Item> View for GridBuffer<Item>
+where Item: Clone + Send + Sync + 'static
+{
+ type Msg = IndexArea<Point2<i16>>;
+}
+
+impl<Item> IndexView<Point2<i16>> for GridBufferView<Item>
+where Item: Clone + Send + Sync + 'static
+{
+ type Item = Item;
+
+ fn get(&self, key: &Point2<i16>) -> Option<Self::Item> {
+ self.data.get(key).cloned()
+ }
+
+ fn area(&self) -> IndexArea<Point2<i16>> {
+ IndexArea::Range(
+ Point2::new(0, 0)
+ ..= self.limit
+ )
+ }
+}
+
+pub struct GridBufferController<Item>
+where Item: Clone + Send + Sync + 'static
+{
+ data: Arc<RwLock<HashMap<Point2<i16>, Item>>>,
+ cast: Arc<RwLock<ObserverBroadcast<dyn IndexView<Point2<i16>, Item = Item>>>>
+}
+
+impl<Key, Item> GridBuffer<Key, Item>
+where Key: Clone + Hash + Eq + Send + Sync + 'static,
+ Item: Clone + Send + Sync + 'static
+{
+ pub fn new(port: InnerViewPort<dyn IndexView<Point2<i16>, Item = Item>>) -> Self {
+ let data = Arc::new(RwLock::new(HashMap::<Point2<i16>, Item>::new()));
+ port.set_view(Some(Arc::new(GridBufferView(data.clone()))));
+
+ GridBuffer {
+ data,
+ cast: port.get_broadcast()
+ }
+ }
+
+ pub fn insert(&mut self, key: Point2<i16>, item: Item) {
+ self.data.write().unwrap().insert(key.clone(), item);
+
+ if
+
+ self.cast.notify(&IndexArea::Set(vec![ key ]));
+ }
+
+ pub fn insert_iter<T>(&mut self, iter: T)
+ where T: IntoIterator<Item = (Point2<i16>, Item)> {
+ for (key, item) in iter {
+ self.insert(key, item);
+ }
+ }
+
+ pub fn remove(&mut self, key: Point2<i16>) {
+ self.data.write().unwrap().remove(&key);
+ self.cast.notify(&IndexArea::Set(vec![ key ]));
+ }
+}
+