358 lines
13 KiB
Rust
358 lines
13 KiB
Rust
//! Object-to-visual dependencies. Cached results never own VM references.
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use crate::{
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block::{self, Kind},
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ui_bridge::{UiKind, UiNode},
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};
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use endor_core::{ChangeBatch, ChangeKey, ObjectRef, ObjectStore, Value, VmError};
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use std::{
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collections::{HashMap, HashSet, VecDeque},
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sync::Arc,
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};
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#[derive(Debug)]
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struct Cached {
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node: Arc<UiNode>,
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dependencies: Vec<Dependency>,
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children: Vec<ObjectRef>,
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}
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#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
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struct Dependency {
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object: ObjectRef,
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property: Option<String>,
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}
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#[derive(Debug, Default)]
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pub struct RenderCache {
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entries: HashMap<ObjectRef, Cached>,
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dependents: HashMap<Dependency, HashSet<ObjectRef>>,
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parents: HashMap<ObjectRef, HashSet<ObjectRef>>,
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dirty: HashSet<ObjectRef>,
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pub last_invalidation: String,
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pub visited: usize,
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pub reused: usize,
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}
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impl RenderCache {
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pub fn invalidate(&mut self, batch: ChangeBatch) {
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let mut queue = VecDeque::new();
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if batch.rescan_required {
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self.last_invalidation = "change journal overflow".into();
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queue.extend(self.entries.keys().copied());
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} else {
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for change in batch.changes {
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let key = Dependency {
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object: change.object,
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property: match change.key {
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ChangeKey::Attribute(name) => Some(name),
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ChangeKey::Contents => None,
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},
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};
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if let Some(owners) = self.dependents.get(&key) {
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self.last_invalidation = format!("{} {:?}", key.object, key.property);
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queue.extend(owners);
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}
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}
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}
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self.invalidate_objects(queue);
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}
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pub fn invalidate_objects(&mut self, objects: impl IntoIterator<Item = ObjectRef>) {
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let mut queue: VecDeque<_> = objects.into_iter().collect();
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while let Some(block) = queue.pop_front() {
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if self.dirty.insert(block)
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&& let Some(parents) = self.parents.get(&block)
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{
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queue.extend(parents);
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}
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}
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}
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fn remove(&mut self, block: ObjectRef) -> Option<Cached> {
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let old = self.entries.remove(&block)?;
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for source in &old.dependencies {
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if let Some(owners) = self.dependents.get_mut(source) {
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owners.remove(&block);
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if owners.is_empty() {
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self.dependents.remove(source);
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}
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}
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}
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for child in &old.children {
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if let Some(parents) = self.parents.get_mut(child) {
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parents.remove(&block);
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if parents.is_empty() {
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self.parents.remove(child);
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}
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}
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}
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Some(old)
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}
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pub fn prune(&mut self, store: &ObjectStore) {
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let dead: Vec<_> = self
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.entries
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.keys()
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.filter(|v| store.object(**v).is_err())
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.copied()
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.collect();
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for block in dead {
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self.remove(block);
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self.dirty.remove(&block);
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}
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}
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pub fn snapshot(
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&mut self,
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store: &ObjectStore,
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root: ObjectRef,
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) -> Result<Arc<UiNode>, VmError> {
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self.visited = 0;
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self.reused = 0;
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let mut work = vec![(root, false)];
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let mut path = HashSet::new();
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let mut values = Vec::<Arc<UiNode>>::new();
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while let Some((block, finish)) = work.pop() {
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if !finish {
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if !self.dirty.contains(&block)
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&& let Some(cached) = self.entries.get(&block)
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{
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self.reused += 1;
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values.push(cached.node.clone());
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continue;
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}
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self.visited += 1;
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if self.visited > 10_000 {
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return Err(VmError::ExecutionLimit("expanded Block graph"));
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}
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}
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store.check_typed_instance_storage(block)?;
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let (data_ref, raw_data, raw_dependencies) = block::resolve_tracked(store, block)?;
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let data = block::visual_data(store, raw_data)?;
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let mut dependencies: Vec<_> = raw_dependencies
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.into_iter()
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.map(|object| Dependency {
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object,
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property: None,
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})
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.collect();
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let storage = *store
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.attribute_path(block)?
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.last()
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.expect("nonempty attribute path");
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for name in store.typed_method_names(block)? {
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dependencies.push(Dependency {
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object: storage,
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property: Some(name),
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});
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}
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if let Some(properties) = data.properties {
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for (name, _) in block::native_properties(&data) {
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dependencies.push(Dependency {
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object: properties,
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property: Some(name.into()),
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});
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}
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}
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if !finish {
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if !path.insert(data_ref) {
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return Err(VmError::InvalidArgument("cyclic Block composition"));
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}
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work.push((block, true));
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for child in data.children.iter().rev() {
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work.push((child.block, false));
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}
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continue;
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}
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path.remove(&data_ref);
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let mut protocol_key = String::new();
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let mut custom_event = false;
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if let Some(definition) = store.type_of(block)? {
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protocol_key.push_str(&definition.to_string());
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for name in ["measure", "arrange", "paint", "hitTest", "onEvent"] {
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if let Some(method) = store.lookup_method(definition, name)? {
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let version = store.change_version(method)?;
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protocol_key.push_str(&format!("/{method}:{version}"));
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dependencies.push(Dependency {
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object: method,
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property: None,
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});
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}
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}
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let event = store.lookup_method(definition, "onEvent")?;
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let mut current = Some(definition);
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while let Some(definition) = current {
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dependencies.push(Dependency {
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object: definition,
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property: None,
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});
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let item = store.payload::<endor_core::EndorTypeObject>(definition, "Type")?;
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current = item.base();
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}
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custom_event = event
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.map(|function| {
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crate::ui_bridge::is_intrinsic_event(store, function).map(|native| !native)
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})
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.transpose()?
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.unwrap_or(false);
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}
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let mut click_connection = false;
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for connection in &data.subscriptions {
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dependencies.push(Dependency {
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object: *connection,
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property: None,
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});
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let item = store
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.payload::<crate::event_dispatch::Connection>(*connection, "Connection")?;
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click_connection |= item.kind == "click" && item.handler.is_some();
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}
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let children = values.split_off(values.len() - data.children.len());
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let kind = match &data.kind {
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Kind::Text { value, size, color } => {
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let value = if let Some((source, field)) = &data.text_binding {
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let storage = store.attribute_path(*source)?;
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for (index, object) in storage.iter().enumerate() {
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dependencies.push(Dependency {
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object: *object,
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property: (index + 1 == storage.len()).then(|| field.clone()),
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});
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}
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match store.get_attr(*source, field)? {
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Value::Nil => "nil".into(),
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Value::Bool(v) => v.to_string(),
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Value::Number(v) => v.to_string(),
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Value::Text(v) => v,
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Value::Object(v) => {
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dependencies.push(Dependency {
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object: v,
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property: None,
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});
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store.str(v)?
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}
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}
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} else {
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value.clone()
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};
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UiKind::Text {
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value,
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size: *size,
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color: color.clone(),
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}
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}
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Kind::Rect {
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width,
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height,
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radius,
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color,
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} => UiKind::Rect {
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width: *width,
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height: *height,
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radius: *radius,
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color: color.clone(),
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},
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Kind::Scroll { width, height } => UiKind::Scroll {
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axis: data.scroll_axis,
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width: *width,
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height: *height,
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padding: data.padding,
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gap: data.gap,
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children,
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},
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Kind::Spacer(size) => UiKind::Spacer(*size),
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Kind::Overlay => UiKind::Overlay {
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padding: data.padding,
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children,
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},
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Kind::Row => UiKind::Row {
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padding: data.padding,
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gap: data.gap,
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children,
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},
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Kind::Page if data.surface.mode == crate::page::Mode::Canvas => UiKind::Canvas {
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positions: data
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.children
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.iter()
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.map(|child| {
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let (_, data) = block::resolve(store, child.block)?;
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Ok(block::visual_data(store, data)?.position)
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})
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.collect::<Result<Vec<_>, VmError>>()?,
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children,
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},
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Kind::Page if data.surface.mode == crate::page::Mode::Horizontal => UiKind::Row {
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padding: data.padding,
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gap: data.gap,
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children,
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},
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Kind::Column | Kind::Page => UiKind::Column {
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padding: data.padding,
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gap: data.gap,
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children,
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},
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Kind::Button => UiKind::Button {
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padding: data.padding,
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gap: data.gap,
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children,
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},
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};
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let next = UiNode {
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surface: matches!(data.kind, Kind::Page).then(|| {
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let mut surface = data.surface.clone();
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surface.page = block.to_string();
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surface
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}),
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flex: data.flex,
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flex_policy: data.flex_policy,
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main_align: data.main_align,
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cross_align: data.cross_align,
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align_self: data.align_self,
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margin: data.margin,
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sizing: data.sizing,
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padding_edges: data.padding_edges,
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border: data.border,
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border_color: data.border_color.clone(),
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clip_children: data.clip_children,
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block_id: block.to_string(),
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protocol_key,
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slots: data.children.iter().map(|c| c.slot).collect(),
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interactive: matches!(&data.kind, Kind::Button)
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|| data.click.is_some()
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|| click_connection
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|| custom_event,
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kind,
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};
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let old = self.remove(block);
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let node = if let Some(old) = old.as_ref().filter(|old| old.node.shallow_eq(&next)) {
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old.node.clone()
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} else {
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Arc::new(next)
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};
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dependencies.sort_unstable();
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dependencies.dedup();
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let child_refs: Vec<_> = data.children.iter().map(|child| child.block).collect();
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for source in &dependencies {
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self.dependents
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.entry(source.clone())
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.or_default()
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.insert(block);
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}
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for child in &child_refs {
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self.parents.entry(*child).or_default().insert(block);
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}
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self.entries.insert(
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block,
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Cached {
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node: node.clone(),
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dependencies,
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children: child_refs,
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},
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);
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self.dirty.remove(&block);
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values.push(node);
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}
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values
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.pop()
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.ok_or(VmError::InvalidArgument("empty Block snapshot"))
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}
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}
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