flatten() for SequenceViews

This commit is contained in:
Michael Sippel 2021-01-24 23:49:13 +01:00
parent 0f21a6dcd6
commit 8d73e67615
Signed by: senvas
GPG key ID: F96CF119C34B64A6
5 changed files with 361 additions and 56 deletions

View file

@ -71,10 +71,7 @@ impl<V: View + ?Sized> Clone for ViewPort<V> {
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
#[derive(Clone)]
pub struct InnerViewPort<V: View + ?Sized>(ViewPort<V>);
#[derive(Clone)]
pub struct OuterViewPort<V: View + ?Sized>(ViewPort<V>);
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
@ -98,6 +95,12 @@ impl<V: View + ?Sized> InnerViewPort<V> {
}
}
impl<V: View + ?Sized> Clone for InnerViewPort<V> {
fn clone(&self) -> Self {
InnerViewPort(self.0.clone())
}
}
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
impl<V: View + ?Sized + 'static> OuterViewPort<V> {
@ -127,6 +130,12 @@ impl<V: View + ?Sized + 'static> OuterViewPort<V> {
}
}
impl<V: View + ?Sized> Clone for OuterViewPort<V> {
fn clone(&self) -> Self {
OuterViewPort(self.0.clone())
}
}
/*
impl<V: View + ?Sized + 'static> OuterViewPort<V>
where V::Msg: Clone {

View file

@ -20,7 +20,7 @@ use {
cgmath::{Vector2, Point2},
termion::event::{Event, Key},
crate::{
core::{View, Observer, ObserverExt, ObserverBroadcast, ViewPort},
core::{View, Observer, ObserverExt, ObserverBroadcast, ViewPort, OuterViewPort},
index::{ImplIndexView},
terminal::{
TerminalView,
@ -30,6 +30,7 @@ use {
Terminal,
TerminalCompositor
},
sequence::{VecBuffer, SequenceView},
grid::{GridOffset, GridWindowIterator},
singleton::{SingletonView, SingletonBuffer},
string_editor::{StringEditor, insert_view::StringInsertView},
@ -59,71 +60,104 @@ async fn main() {
let window_size_port = ViewPort::new();
let mut window_size = SingletonBuffer::new(Vector2::new(0, 0), window_size_port.inner());
let opening_port = ViewPort::new();
let mut opening = VecBuffer::new(opening_port.inner());
let delim_port = ViewPort::new();
let mut delim = VecBuffer::new(delim_port.inner());
let closing_port = ViewPort::new();
let mut closing = VecBuffer::new(closing_port.inner());
let e1_port = ViewPort::new();
let mut e1 = VecBuffer::new(e1_port.inner());
let e2_port = ViewPort::new();
let mut e2 = VecBuffer::new(e2_port.inner());
opening.push(TerminalAtom::new('[', TerminalStyle::fg_color((180, 120, 80))));
delim.push(TerminalAtom::new(',', TerminalStyle::fg_color((180, 120, 80))));
delim.push(TerminalAtom::new(' ', TerminalStyle::fg_color((180, 120, 80))));
closing.push(TerminalAtom::new(']', TerminalStyle::fg_color((180, 120, 80))));
let str_list_port = ViewPort::new();
let mut str_list = VecBuffer::<OuterViewPort<dyn SequenceView<Item = TerminalAtom>>>::new(str_list_port.inner());
str_list.push(opening_port.outer().to_sequence());
str_list.push(closing_port.outer().to_sequence());
compositor.push(
str_list_port.outer()
.to_sequence()
.flatten()
.to_index()
.map_key(
|idx| Point2::new(*idx as i16, 0 as i16),
|pt| if pt.y == 0 { Some(pt.x as usize) } else { None }
)
);
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
// cells
// welcome message
task::sleep(std::time::Duration::from_millis(500)).await;
str_list.insert(1, e1_port.outer().to_sequence());
for c in "Welcome!".chars() {
e1.push(TerminalAtom::new(c, TerminalStyle::fg_color((180, 180, 255))));
task::sleep(std::time::Duration::from_millis(80)).await;
}
task::sleep(std::time::Duration::from_millis(500)).await;
str_list.insert(2, delim_port.outer().to_sequence());
str_list.insert(3, e2_port.outer().to_sequence());
task::sleep(std::time::Duration::from_millis(80)).await;
for c in "This is a flattened SequenceView.".chars() {
e2.push(TerminalAtom::new(c, TerminalStyle::fg_color((180, 180, 255))));
task::sleep(std::time::Duration::from_millis(80)).await;
}
let cells_port = ViewPort::new();
let cells = cell_layout::CellLayout::with_port(cells_port.inner());
task::sleep(std::time::Duration::from_millis(500)).await;
compositor.push(cells_port.outer());
let l2_port = ViewPort::new();
let mut l2 = VecBuffer::new(l2_port.inner());
*str_list.get_mut(1) = l2_port.outer().to_sequence().flatten();
l2.push(opening_port.outer().to_sequence());
e1.clear();
l2.push(e1_port.outer().to_sequence());
l2.push(closing_port.outer().to_sequence());
for c in "they can even be NeStEd!".chars() {
e1.push(TerminalAtom::new(c, TerminalStyle::fg_color((180, 180, 255))));
task::sleep(std::time::Duration::from_millis(80)).await;
}
for i in 0 .. 10 {
task::sleep(std::time::Duration::from_millis(100)).await;
let col = (100+10*i, 55+20*i, 20+ 20*i);
*opening.get_mut(0) = TerminalAtom::new('{', TerminalStyle::fg_color(col));
*closing.get_mut(0) = TerminalAtom::new('}', TerminalStyle::fg_color(col));
}
for i in 0 .. 10 {
task::sleep(std::time::Duration::from_millis(100)).await;
let col = (100+10*i, 55+20*i, 20+ 20*i);
*opening.get_mut(0) = TerminalAtom::new('<', TerminalStyle::fg_color(col));
*closing.get_mut(0) = TerminalAtom::new('>', TerminalStyle::fg_color(col));
}
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
// string editor 1
let mut editor = StringEditor::new();
let (leveled_edit_view, leveled_edit_view_port) = LeveledTermView::new(editor.insert_view());
cell_layout::CellLayout::set_cell(
&cells,
Point2::new(0, 0),
leveled_edit_view_port
.map_item(
move |_pos, atom| atom.add_style_back(
TerminalStyle::fg_color((200,200,200)))));
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
// string editor 2
let mut editor2 = StringEditor::new();
let (leveled_edit2_view, leveled_edit2_view_port) = LeveledTermView::new(editor2.insert_view());
cell_layout::CellLayout::set_cell(
&cells,
Point2::new(1, 1),
leveled_edit2_view_port
.map_item(
move |_pos, atom| atom.add_style_back(
TerminalStyle::fg_color((200,200,200)))));
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
// another view of the string, without editor
cell_layout::CellLayout::set_cell(
&cells,
Point2::new(1, 0),
editor.get_data_port()
.to_sequence()
.to_index()
.map_key(
|idx| Point2::new(*idx as i16, 2 + *idx as i16),
|pt| if pt.x == pt.y-2 { Some(pt.x as usize) } else { None }
).map_item(
|_key, c| TerminalAtom::new(*c, TerminalStyle::fg_color((80, 20, 180)).add(TerminalStyle::bg_color((40,10,90))))
)
);
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
// welcome message
for c in "Welcome!".chars() {
editor.insert(c);
task::sleep(std::time::Duration::from_millis(80)).await;
}
task::sleep(std::time::Duration::from_millis(500)).await;
for c in "Use arrow keys to navigate.".chars() {
editor2.insert(c);
task::sleep(std::time::Duration::from_millis(80)).await;
}
/*\
<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
@ -131,7 +165,7 @@ async fn main() {
<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
\*/
let mut sel = 0;
let mut sel = 0 as usize;
leveled_edit_view.write().unwrap().set_level(if sel == 0 {1} else {0});
leveled_edit2_view.write().unwrap().set_level(if sel == 1 {1} else {0});

255
src/sequence/flatten.rs Normal file
View file

@ -0,0 +1,255 @@
use {
async_std::stream::StreamExt,
std::{
sync::{Arc, Weak, RwLock},
collections::{HashMap, HashSet}
},
crate::{
core::{
View, Observer, ObserverExt, ObserverBroadcast,
ViewPort, InnerViewPort, OuterViewPort,
channel::{ChannelSender, ChannelReceiver}
},
sequence::SequenceView
}
};
impl<V1, V2> OuterViewPort<V1>
where V1: SequenceView<Item = OuterViewPort<V2>> + ?Sized + 'static,
V2: SequenceView + ?Sized + 'static
{
pub fn flatten(&self) -> OuterViewPort<dyn SequenceView<Item = V2::Item>> {
let port = ViewPort::new();
Flatten::new(self.clone(), port.inner());
port.into_outer()
}
}
pub struct Flatten<V1, V2>
where V1: SequenceView<Item = OuterViewPort<V2>> + ?Sized + 'static,
V2: SequenceView + ?Sized + 'static
{
length: usize,
top: Arc<RwLock<TopObserver<V1, V2>>>,
chunks: HashMap<usize, Arc<RwLock<BotObserver<V2>>>>,
cast: Arc<RwLock<ObserverBroadcast<dyn SequenceView<Item = V2::Item>>>>
}
struct TopObserver<V1, V2>
where V1: SequenceView<Item = OuterViewPort<V2>> + ?Sized + 'static,
V2: SequenceView + ?Sized + 'static
{
view: Option<Arc<V1>>,
sender: ChannelSender<HashSet<usize>>
}
struct BotObserver<V2>
where V2: SequenceView + ?Sized + 'static
{
offset: usize,
view: Option<Arc<V2>>,
sender: ChannelSender<HashSet<usize>>
}
impl<V1, V2> Observer<V1> for TopObserver<V1, V2>
where V1: SequenceView<Item = OuterViewPort<V2>> + ?Sized + 'static,
V2: SequenceView + ?Sized + 'static
{
fn reset(&mut self, view: Option<Arc<V1>>) {
let old_len = self.view.len().unwrap_or(0);
self.view = view;
let new_len = self.view.len().unwrap_or(0);
self.notify_each(0 .. std::cmp::max(old_len, new_len));
}
fn notify(&self, chunk_idx: &usize) {
self.sender.send(*chunk_idx);
}
}
impl<V2> Observer<V2> for BotObserver<V2>
where V2: SequenceView + ?Sized + 'static
{
fn reset(&mut self, src: Option<Arc<V2>>) {
let old_len = self.view.len().unwrap_or(0);
self.view = src;
let new_len = self.view.len().unwrap_or(0);
self.notify_each(0 .. std::cmp::max(old_len, new_len));
}
fn notify(&self, idx: &usize) {
self.sender.send(*idx);
}
}
impl<V1, V2> View for Flatten<V1, V2>
where V1: SequenceView<Item = OuterViewPort<V2>> + ?Sized + 'static,
V2: SequenceView + ?Sized + 'static
{
type Msg = usize;
}
impl<V1, V2> SequenceView for Flatten<V1, V2>
where V1: SequenceView<Item = OuterViewPort<V2>> + ?Sized + 'static,
V2: SequenceView + ?Sized + 'static
{
type Item = V2::Item;
fn get(&self, idx: &usize) -> Option<Self::Item> {
let chunk = self.chunks[&self.get_chunk_idx(*idx)?].read().unwrap();
chunk.view.get(&(*idx - chunk.offset))
}
fn len(&self) -> Option<usize> {
Some(self.length)
}
}
impl<V1, V2> Flatten<V1, V2>
where V1: SequenceView<Item = OuterViewPort<V2>> + ?Sized + 'static,
V2: SequenceView + ?Sized + 'static
{
pub fn new(
top_port: OuterViewPort<V1>,
out_port: InnerViewPort<dyn SequenceView<Item = V2::Item>>
) -> Arc<RwLock<Self>> {
let (sender, mut recv) = crate::core::channel::set_channel();
let top_obs = Arc::new(RwLock::new(
TopObserver {
view: None,
sender
}
));
let flat = Arc::new(RwLock::new(Flatten::<V1, V2> {
length: 0,
top: top_obs.clone(),
chunks: HashMap::new(),
cast: out_port.get_broadcast()
}));
let f = flat.clone();
let cast = out_port.get_broadcast();
async_std::task::spawn(async move {
while let Some(chunk_idx) = recv.next().await {
if let Some(mut chunk_rcv) = f.write().unwrap().update_chunk(chunk_idx) {
let f = f.clone();
let cast = cast.clone();
async_std::task::spawn(async move {
while let Some(idx) = chunk_rcv.next().await {
let mut flat = f.write().unwrap();
let chunk = flat.chunks[&chunk_idx].read().unwrap();
let chunk_offset = chunk.offset;
let chunk_len = chunk.view.len().unwrap_or(0);
drop(chunk);
let mut dirty_idx = Vec::new();
if idx+1 >= chunk_len {
dirty_idx = flat.update_offsets(chunk_idx);
}
drop(flat);
cast.notify(&(idx + chunk_offset));
cast.notify_each(dirty_idx);
}
});
}
}
});
top_port.add_observer(top_obs);
out_port.set_view(Some(flat.clone()));
flat
}
/// the top-sequence has changed the item at chunk_idx,
/// create a new observer for the contained sub sequence
fn update_chunk(&mut self, chunk_idx: usize) -> Option<ChannelReceiver<HashSet<usize>>> {
if let Some(chunk_port) = self.top.read().unwrap().view.get(&chunk_idx) {
let (sender, recv) = crate::core::channel::set_channel();
let chunk_obs = Arc::new(RwLock::new(
BotObserver {
offset:
if chunk_idx > 0 {
if let Some(prev_chunk) = self.chunks.get(&(chunk_idx-1)) {
let prev_chunk = prev_chunk.read().unwrap();
prev_chunk.offset + prev_chunk.view.len().unwrap_or(0)
} else {
0
}
} else {
0
},
view: None,
sender
}
));
self.chunks.insert(chunk_idx, chunk_obs.clone());
chunk_port.add_observer(chunk_obs);
Some(recv)
} else {
self.chunks.remove(&chunk_idx);
None
}
}
/// recalculate all chunk offsets beginning at start_idx
/// and update length of flattened sequence
fn update_offsets(&mut self, start_idx: usize) -> Vec<usize> {
let top_len = self.top.read().unwrap().view.len().unwrap_or(0);
let first_chunk = self.chunks.get(&start_idx).unwrap().read().unwrap();
let mut start_offset = first_chunk.offset + first_chunk.view.len().unwrap_or(0);
let mut cur_offset = start_offset;
let mut dirty_idx = Vec::new();
for chunk_idx in start_idx+1 .. top_len {
if let Some(cur_chunk) = self.chunks.get(&chunk_idx) {
let mut cur_chunk = cur_chunk.write().unwrap();
let chunk_len = cur_chunk.view.len().unwrap_or(0);
let old_offset = cur_chunk.offset;
cur_chunk.offset = cur_offset;
if old_offset != cur_offset {
dirty_idx.extend(
std::cmp::min(old_offset, cur_offset)
.. std::cmp::max(old_offset, cur_offset) + chunk_len
);
}
cur_offset += chunk_len;
}
}
let old_length = self.length;
self.length = cur_offset;
dirty_idx.extend(self.length .. old_length);
dirty_idx
}
/// given an index in the flattened sequence,
/// which sub-sequence does it belong to?
fn get_chunk_idx(&self, glob_idx: usize) -> Option<usize> {
for chunk_idx in 0 .. self.top.read().unwrap().view.len().unwrap_or(0) {
if let Some(cur_chunk) = self.chunks.get(&chunk_idx) {
let cur_chunk = cur_chunk.read().unwrap();
if glob_idx < cur_chunk.offset + cur_chunk.view.len().unwrap_or(0) {
return Some(chunk_idx)
}
}
}
None
}
}

View file

@ -1,6 +1,7 @@
pub mod seq2idx;
pub mod vec_buffer;
pub mod flatten;
pub use {
seq2idx::{Sequence2Index},

View file

@ -166,6 +166,12 @@ where T: Clone + Send + Sync + 'static {
self.cast.notify(&diff);
}
pub fn clear(&mut self) {
for _ in 0 .. self.len() {
self.remove(0);
}
}
pub fn len(&self) -> usize {
self.data.read().unwrap().len()
}