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flatten(): add quickfix to cover up race condition in diff notification

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This commit is contained in:
Michael Sippel 2021-08-11 17:29:13 +02:00
parent b6f67c8ee3
commit 261bf15b70
Signed by: senvas
GPG key ID: F96CF119C34B64A6
1 changed files with 57 additions and 38 deletions
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95
nested/src/grid/flatten.rs
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@ -19,7 +19,7 @@ use {
impl<Item> OuterViewPort<dyn GridView<Item = OuterViewPort<dyn GridView<Item = Item>>>>
where Item: 'static{
pub fn flatten(&self) -> OuterViewPort<dyn GridView<Item = Item> + 'static> {
pub fn flatten(&self) -> OuterViewPort<dyn GridView<Item = Item>> {
let port = ViewPort::new();
port.add_update_hook(Arc::new(self.0.clone()));
Flatten::new(self.clone(), port.inner());
@ -100,49 +100,61 @@ where Item: 'static
/// create a new observer for the contained sub sequence
fn update_chunk(&mut self, chunk_idx: Point2<i16>) {
if let Some(chunk_port) = self.top.get(&chunk_idx) {
self.chunks.insert(
chunk_idx,
Chunk {
offset: Vector2::new(0, 0),
limit: Point2::new(0, 0),
view: self.proj_helper.new_index_arg(
chunk_port.clone(),
move |s: &mut Self, idx| {
if let Some(chunk) = s.chunks.get(&chunk_idx) {
let chunk_offset = chunk.offset;
let chunk_limit = chunk.view.range().end;
let mut dirty_idx = Vec::new();
if chunk.limit != chunk_limit {
dirty_idx = s.update_all_offsets();
}
s.cast.notify(&(idx + chunk_offset));
s.cast.notify_each(dirty_idx);
}
let view = self.proj_helper.new_index_arg(
chunk_port.clone(),
move |s: &mut Self, idx| {
if let Some(chunk) = s.chunks.get(&chunk_idx) {
if chunk.limit != chunk.view.range().end {
s.update_all_offsets();
}
)
}
if let Some(chunk) = s.chunks.get(&chunk_idx) {
s.cast.notify(&(idx + chunk.offset));
}
}
);
/*
if let Some(chunk) = self.chunks.get_mut(&chunk_idx) {
chunk.view = view;
} else {
*/
self.chunks.insert(
chunk_idx,
Chunk {
offset: Vector2::new(-1, -1),
limit: Point2::new(-1, -1),
view
}
);
/*
}
*/
chunk_port.0.update();
let dirty_idx = self.update_all_offsets();
self.cast.notify_each(dirty_idx);
self.update_all_offsets();
chunk_port.0.update();
} else {
// todo:
//self.proj_helper.remove_arg();
self.chunks.remove(&chunk_idx);
let mut dirty_idx = Vec::new();
if let Some(chunk) = self.chunks.get_mut(&chunk_idx) {
dirty_idx.extend(
GridWindowIterator::from(
Point2::new(chunk.offset.x, chunk.offset.y)
.. Point2::new(chunk.offset.x + chunk.limit.x, chunk.offset.y + chunk.limit.y))
);
}
let dirty_idx = self.update_all_offsets();
self.chunks.remove(&chunk_idx);
self.cast.notify_each(dirty_idx);
self.update_all_offsets();
}
}
/// recalculate all chunk offsets
/// and update size of flattened grid
fn update_all_offsets(&mut self) -> Vec<Point2<i16>> {
fn update_all_offsets(&mut self) {
let mut dirty_idx = Vec::new();
let top_range = self.top.range();
@ -168,36 +180,43 @@ where Item: 'static
GridWindowIterator::from(
Point2::new(std::cmp::min(old_offset.x, chunk.offset.x),
std::cmp::min(old_offset.y, chunk.offset.y))
.. Point2::new(std::cmp::max(old_offset.x, chunk.offset.x) + std::cmp::max(old_limit.x, chunk.limit.x),
std::cmp::max(old_offset.y, chunk.offset.y) + std::cmp::max(old_limit.y, chunk.limit.y)))
.. Point2::new(std::cmp::max(old_offset.x + old_limit.x, chunk.offset.x + chunk.limit.x),
std::cmp::max(old_offset.y + old_limit.y, chunk.offset.y + chunk.limit.y)))
);
}
}
}
//let old_limit = self.limit;
let old_limit = self.limit;
self.limit = Point2::new(
(0 .. top_range.end.x as usize).map(|x| col_widths[x]).sum(),
(0 .. top_range.end.y as usize).map(|y| row_heights[y]).sum()
);
dirty_idx
// fixme: dirty hack to mitigate the buggy notifications, not efficien
dirty_idx.extend(
GridWindowIterator::from(
Point2::new(0, 0) .. Point2::new(
std::cmp::max(old_limit.x, self.limit.x),
std::cmp::max(old_limit.y, self.limit.y)
)
)
);
self.cast.notify_each(dirty_idx);
}
/// given an index in the flattened sequence,
/// which sub-sequence does it belong to?
fn get_chunk_idx(&self, glob_pos: Point2<i16>) -> Option<Point2<i16>> {
let mut offset = Point2::new(0, 0);
for chunk_idx in GridWindowIterator::from(self.top.range()) {
if let Some(chunk) = self.chunks.get(&chunk_idx) {
let chunk_range = chunk.view.range();
let end = chunk_range.end + chunk.offset;
offset += Vector2::new(chunk_range.end.x, chunk_range.end.y);
if glob_pos.x < offset.x && glob_pos.y < offset.y {
if glob_pos.x < end.x && glob_pos.y < end.y {
return Some(chunk_idx);
}
}
}
}