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refactor(engine): simplify asset and code generation helpers

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This commit is contained in:
Dylan M. Taylor
2026-10-28 16:00:36 +00:00
parent 5e16683963
commit d87f9effe1
36 changed files with 1062 additions and 849 deletions
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crates/engine/src/assets/components/patch.rs
+107 -87
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@@ -2,7 +2,12 @@ use super::diff::{binding_group, bindings_of, diff_groups, follow_boolean_defaul
use super::guard::{own_slot_content, relink_copy};
use super::instances::{copy_group, field_group, sync_instance};
use super::sync::insert_linked;
use super::*;
use super::{
BTreeMap, BTreeSet, Document, MAX_DEPTH, Node, NodeId, NodeKind, default_instance_name, holds_content, inside_instance, owning_component,
owning_instance, root_instance, scope, slot_edited, slot_scope,
};
type OverrideGroups = (Vec<&'static str>, Vec<&'static str>, Vec<&'static str>);
/// After an edit: record overrides inside instances, then rebuild instances whose main changed,
/// whose properties or main were switched, or whose overrides were reset.
@@ -14,93 +19,9 @@ pub fn sync_after_edit(doc: &mut Document, before: &Document, changed: &[NodeId]
}
}
let changed = changed.as_slice();
// 0. A slot whose layers were added, removed or reordered holds the instance's own content
// from now on; copies of instance layers placed elsewhere stop mirroring their main.
for &id in changed {
let (Some(n), Some(b)) = (doc.node(id), before.node(id)) else { continue };
if n.children == b.children || owning_instance(doc, id).is_none() {
continue;
}
if let Some(slot) = slot_scope(doc, id)
&& !slot_edited(doc, slot)
{
own_slot_content(doc, slot);
}
}
for &id in changed {
if !before.contains(id) {
relink_copy(doc, id);
}
}
adopt_slot_content(doc, before, changed);
let mut resync: BTreeSet<NodeId> = BTreeSet::new();
// 1. Overrides for layers edited inside instances.
for &id in changed {
let (Some(n), Some(b)) = (doc.node(id), before.node(id)) else { continue };
let Some(inst) = owning_instance(doc, id) else { continue };
let top_root = inst == id && !inside_instance(doc, id);
if top_root
&& let (NodeKind::Instance { component: c1, props: p1 }, NodeKind::Instance { component: c2, props: p2 }) = (&n.kind, &b.kind)
&& (c1 != c2 || p1 != p2)
{
// Switching the main or a property value of an instance isn't an override.
resync.insert(id);
}
let raw = diff_groups(b, n);
let mut groups = raw.clone();
// An instance's own place, resizing, export settings, interactions and variable modes are
// its own, not overrides.
if top_root {
groups.retain(|g| !matches!(*g, "component" | "props" | "position" | "resizing" | "exports" | "interactions" | "modes"));
}
if groups.iter().any(|g| matches!(*g, "size" | "position")) {
groups.retain(|g| !matches!(*g, "size" | "position") || !geometry_derived(doc, before, id, g));
}
// A value equal to the main's isn't an override (setting it back clears the override).
let mut cleared = Vec::new();
if let Some(src) = n.source.and_then(|s| doc.node(s)) {
let mut differs = diff_groups(src, n);
if inst == id {
differs.retain(|g| *g != "name");
if n.name != default_instance_name(doc, src.id) {
differs.push("name");
}
}
// A value from the same variable as the main's (resolved in this layer's modes) isn't an
// override either.
let from_variables = variable_groups(n, src);
groups.retain(|g| differs.contains(g) && !from_variables.contains(g));
// Binding another variable (or none) where the main binds one is an override.
for (k, _) in b.bound.iter().chain(n.bound.iter()) {
let Some(g) = binding_group(k) else { continue };
let rebound = b.bound.get(k) != n.bound.get(k) && !bindings_of(n, g).eq(bindings_of(src, g));
if rebound && !groups.contains(&g) {
groups.push(g);
}
}
cleared =
raw.iter().filter(|g| !matches!(**g, "size" | "position") && !differs.contains(g) && n.overrides.contains(**g)).copied().collect();
if top_root {
cleared.retain(|g| !matches!(*g, "component" | "props"));
}
}
let lost = b.overrides.iter().any(|g| !n.overrides.contains(g));
let nested_switch = !top_root && raw.iter().any(|g| matches!(*g, "component" | "props"));
if (!groups.is_empty() || !cleared.is_empty())
&& let Some(m) = doc.node_mut(id)
{
for g in groups {
m.overrides.insert(g.to_string());
}
for g in cleared {
m.overrides.remove(g);
}
}
if (lost || nested_switch)
&& let Some(r) = root_instance(doc, id)
{
resync.insert(r);
}
}
record_overrides(doc, before, changed, &mut resync);
// 2. Components whose layers changed, were added or removed. Value-only edits (paint, text,
// visibility, …) are carried to the copies directly; anything else rebuilds the instances.
let mut comps: BTreeSet<NodeId> = BTreeSet::new();
@@ -172,6 +93,105 @@ pub fn sync_after_edit(doc: &mut Document, before: &Document, changed: &[NodeId]
rebuild_instances(doc, &comps);
}
/// Slot content changes: layers added, removed or reordered in a slot become the instance's own.
fn adopt_slot_content(doc: &mut Document, before: &Document, changed: &[NodeId]) {
// 0. A slot whose layers were added, removed or reordered holds the instance's own content
// from now on; copies of instance layers placed elsewhere stop mirroring their main.
for &id in changed {
let (Some(n), Some(b)) = (doc.node(id), before.node(id)) else { continue };
if n.children == b.children || owning_instance(doc, id).is_none() {
continue;
}
if let Some(slot) = slot_scope(doc, id)
&& !slot_edited(doc, slot)
{
own_slot_content(doc, slot);
}
}
for &id in changed {
if !before.contains(id) {
relink_copy(doc, id);
}
}
}
/// Overrides for layers edited inside instances; the instances to rebuild go into `resync`.
fn record_overrides(doc: &mut Document, before: &Document, changed: &[NodeId], resync: &mut BTreeSet<NodeId>) {
for &id in changed {
let (Some(n), Some(b)) = (doc.node(id), before.node(id)) else { continue };
let Some(inst) = owning_instance(doc, id) else { continue };
let top_root = inst == id && !inside_instance(doc, id);
if top_root
&& let (NodeKind::Instance { component: c1, props: p1 }, NodeKind::Instance { component: c2, props: p2 }) = (&n.kind, &b.kind)
&& (c1 != c2 || p1 != p2)
{
// Switching the main or a property value of an instance isn't an override.
resync.insert(id);
}
let (raw, groups, cleared) = override_groups(doc, before, id, n, b, inst, top_root);
let lost = b.overrides.iter().any(|g| !n.overrides.contains(g));
let nested_switch = !top_root && raw.iter().any(|g| matches!(*g, "component" | "props"));
if (!groups.is_empty() || !cleared.is_empty())
&& let Some(m) = doc.node_mut(id)
{
for g in groups {
m.overrides.insert(g.to_string());
}
for g in cleared {
m.overrides.remove(g);
}
}
if (lost || nested_switch)
&& let Some(r) = root_instance(doc, id)
{
resync.insert(r);
}
}
}
/// `(raw, groups, cleared)` of layer `id` edited from `b` to `n`: the raw changed groups, the ones
/// that are now overrides and the overrides that were set back to the main's value.
fn override_groups(doc: &Document, before: &Document, id: NodeId, n: &Node, b: &Node, inst: NodeId, top_root: bool) -> OverrideGroups {
let raw = diff_groups(b, n);
let mut groups = raw.clone();
// An instance's own place, resizing, export settings, interactions and variable modes are
// its own, not overrides.
if top_root {
groups.retain(|g| !matches!(*g, "component" | "props" | "position" | "resizing" | "exports" | "interactions" | "modes"));
}
if groups.iter().any(|g| matches!(*g, "size" | "position")) {
groups.retain(|g| !matches!(*g, "size" | "position") || !geometry_derived(doc, before, id, g));
}
// A value equal to the main's isn't an override (setting it back clears the override).
let mut cleared = Vec::new();
if let Some(src) = n.source.and_then(|s| doc.node(s)) {
let mut differs = diff_groups(src, n);
if inst == id {
differs.retain(|g| *g != "name");
if n.name != default_instance_name(doc, src.id) {
differs.push("name");
}
}
// A value from the same variable as the main's (resolved in this layer's modes) isn't an
// override either.
let from_variables = variable_groups(n, src);
groups.retain(|g| differs.contains(g) && !from_variables.contains(g));
// Binding another variable (or none) where the main binds one is an override.
for (k, _) in b.bound.iter().chain(n.bound.iter()) {
let Some(g) = binding_group(k) else { continue };
let rebound = b.bound.get(k) != n.bound.get(k) && !bindings_of(n, g).eq(bindings_of(src, g));
if rebound && !groups.contains(&g) {
groups.push(g);
}
}
cleared = raw.iter().filter(|g| !matches!(**g, "size" | "position") && !differs.contains(g) && n.overrides.contains(**g)).copied().collect();
if top_root {
cleared.retain(|g| !matches!(*g, "component" | "props"));
}
}
(raw, groups, cleared)
}
#[cfg(test)]
thread_local! {
/// Tests: rebuild instances even for edits that could be patched (to compare both ways).