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vectorcraft/crates/doc/src/trace.rs
T
arhammusheer 5beac4f122 #1244: smaller objects: Node 352 -> 152 bytes, NodeKind 200 -> 80, and a cheaper undo estimate
Rarely set fields move into one optional boxed NodeExtras, and large NodeKind payloads (images,
live shapes, blends, envelopes) are boxed. Every object, and every undo step that copies it,
shrinks: a 50k-path move keeps ~24.5 MB per step instead of ~40 MB. Files stay byte-identical
(Node keeps its flat JSON through a borrowed Serialize and a from-wire Deserialize, no flatten),
and loading is slightly faster. Undo and redo reuse their step's size estimate instead of
walking the document again (8.3 -> 5.6 ms for a 50k-path move).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VmMmc1J8XeNLxhRihWv9cc

# Conflicts:
#	crates/engine/src/cmd/graph.rs
#	crates/svg/src/export.rs
2026-10-12 11:02:32 +07:00

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//! Image Trace objects' View: how a live trace draws on screen.
//!
//! An Image Trace object is a group whose `trace` holds `{preset, params, view}` (see
//! `imageTrace.make`). The view is a viewing aid only: exports, printing and Expand always use the
//! tracing result, whatever it is set to.
use crate::node::Node;
/// Image Trace › View.
#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
pub enum TraceView {
/// The traced shapes as they are filled.
#[default]
Result,
/// The traced shapes, with their outlines over them.
ResultWithOutlines,
/// Only the traced shapes' outlines.
Outlines,
/// The source image, with the traced shapes' outlines over it.
OutlinesWithSource,
/// Only the source image.
Source,
}
impl TraceView {
/// Panel order.
pub const ALL: [Self; 5] = [Self::Result, Self::ResultWithOutlines, Self::Outlines, Self::OutlinesWithSource, Self::Source];
/// The id used in command params and in the saved `trace` object.
pub fn id(self) -> &'static str {
match self {
Self::Result => "tracingResult",
Self::ResultWithOutlines => "tracingResultWithOutlines",
Self::Outlines => "outlines",
Self::OutlinesWithSource => "outlinesWithSourceImage",
Self::Source => "sourceImage",
}
}
/// The view an id names (any case).
pub fn from_id(id: &str) -> Option<Self> {
Self::ALL.into_iter().find(|v| v.id().eq_ignore_ascii_case(id))
}
/// The view an Image Trace object's `trace` settings ask for (the tracing result when they
/// name none, or an unknown one).
pub fn of(trace: &serde_json::Value) -> Self {
trace.get("view").and_then(serde_json::Value::as_str).and_then(Self::from_id).unwrap_or_default()
}
/// Whether the source image shows.
pub fn shows_source(self) -> bool {
matches!(self, Self::OutlinesWithSource | Self::Source)
}
/// Whether the traced shapes show filled.
pub fn shows_result(self) -> bool {
matches!(self, Self::Result | Self::ResultWithOutlines)
}
/// Whether the traced shapes' outlines show.
pub fn shows_outlines(self) -> bool {
matches!(self, Self::ResultWithOutlines | Self::Outlines | Self::OutlinesWithSource)
}
}
impl Node {
/// The View of an Image Trace object (the tracing result for anything else, or an unknown id).
pub fn trace_view(&self) -> TraceView {
self.extras().trace.as_deref().map(TraceView::of).unwrap_or_default()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn ids_round_trip_and_unknown_views_show_the_result() {
for v in TraceView::ALL {
assert_eq!(TraceView::from_id(v.id()), Some(v));
assert_eq!(TraceView::from_id(&v.id().to_ascii_uppercase()), Some(v));
assert!(v.shows_result() || v.shows_outlines() || v.shows_source(), "{v:?} shows something");
}
let mut g = Node::group(crate::NodeId(1), vec![]);
assert_eq!(g.trace_view(), TraceView::Result);
g.extras_mut().trace = Some(Box::new(serde_json::json!({"view": "outlines"})));
assert_eq!(g.trace_view(), TraceView::Outlines);
g.extras_mut().trace = Some(Box::new(serde_json::json!({"view": "sepia"})));
assert_eq!(g.trace_view(), TraceView::Result);
}
}