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parser and editor use same code for figuring out what is connected to what

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This commit is contained in:
Joeri Exelmans 2025-10-17 14:37:26 +02:00
parent 6dc7a2e9a7
commit b55cba198e
6 changed files with 228 additions and 149 deletions
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20
src/statecharts/concrete_syntax.ts
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@ -1,5 +1,5 @@
import { Rect2D, Vec2D, Line2D, euclideanDistance, intersectLines, isWithin, lineBBox } from "../VisualEditor/geometry";
import { ARROW_SNAP_THRESHOLD, TEXT_SNAP_THRESHOLD } from "../VisualEditor/parameters";
import { Rect2D, Vec2D, Line2D, euclideanDistance, intersectLines, isWithin, lineBBox, subtractV2D } from "../VisualEditor/geometry";
import { ARROW_SNAP_THRESHOLD, HISTORY_RADIUS, TEXT_SNAP_THRESHOLD } from "../VisualEditor/parameters";
import { sides } from "../VisualEditor/VisualEditor";
export type Rountangle = {
@ -115,3 +115,19 @@ export function findRountangle(point: Vec2D, candidates: Rountangle[]): Rountang
}
}
}
export function findNearestHistory(point: Vec2D, candidates: History[]): History | undefined {
let best;
let bestDistance = Infinity;
for (const h of candidates) {
const diff = subtractV2D(point, {x: h.topLeft.x+HISTORY_RADIUS, y: h.topLeft.y+HISTORY_RADIUS});
const euclideanDistance = Math.hypot(diff.x, diff.y) - HISTORY_RADIUS;
if (euclideanDistance < ARROW_SNAP_THRESHOLD) {
if (euclideanDistance < bestDistance) {
best = h;
bestDistance = euclideanDistance;
}
}
}
return best;
}