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archify-vscode-ext/vendor/archify/renderers/shared/geometry.mjs
T
root-at-skicandClaude Opus 5.5 22815a9940 Archify Diagram Viewer 0.1.0
VS Code extension that previews Archify diagrams from their JSON sources
(live, as you type) and opens rendered Archify HTML in a viewer tab.
Bundles the Archify 3.0.1 renderer and runs it on VS Code's Node runtime.
Adds validation diagnostics, JSON schema help, source-link navigation,
export saving, render-to-file and open-in-browser commands.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-09-30 12:44:15 +03:00

1942 lines
82 KiB
JavaScript

// Geometry helpers shared by all typed renderers. Every function here is
// pure; renderers own their layout tables and pass measured rects
// ({x, y, width, height, cx, cy}) in.
import { recordDiagnostic } from './diagnostics.mjs';
// In degraded mode (no ajv) a type-wrong top-level field reaches the renderer.
// Coerce non-arrays to [] so the module-level Maps build without throwing and
// the friendly validator checks (which run later) report the real problem.
export function asArray(value) {
return Array.isArray(value) ? value : [];
}
// A computed coordinate must be a finite number; NaN/undefined would silently
// write `<rect x="NaN">` into the output. Used by the validators as a backstop.
export function isFinitePoint(...coords) {
return coords.every((c) => Number.isFinite(c));
}
// Separation the layout solver guarantees and separation this check re-derives
// travel through different arithmetic, so a pair the solver placed at exactly
// its minimum can land a few ulps short of this comparison. In #583 the CLI's
// own receipt has the pair `793.6 + 160 + 8` read as 2**-43 past a5's left edge
// at 961.5999999999999 — one ulp at that magnitude. 0.0001 is the numeric
// tolerance the route and layout geometry in this file already compares with.
const NUMERIC_CLEARANCE_PX = 0.0001;
export function rectsOverlap(a, b, gap = 0) {
// Non-finite geometry means "unknown", not "overlapping". Every comparison
// below is false for NaN, so without this guard the negation reports a
// collision for every pair. Callers surface non-finite pos/size through their
// own diagnostic; reporting it again as an overlap buries that message under
// one bogus separation hint per pair.
if (!isFinitePoint(a.x, a.y, a.width, a.height, b.x, b.y, b.width, b.height)) {
return false;
}
return !(
a.x + a.width + gap <= b.x + NUMERIC_CLEARANCE_PX ||
b.x + b.width + gap <= a.x + NUMERIC_CLEARANCE_PX ||
a.y + a.height + gap <= b.y + NUMERIC_CLEARANCE_PX ||
b.y + b.height + gap <= a.y + NUMERIC_CLEARANCE_PX
);
}
export function segmentIntersectsRect(segment, rect, gap = 0) {
const box = {
x1: rect.x - gap,
y1: rect.y - gap,
x2: rect.x + rect.width + gap,
y2: rect.y + rect.height + gap
};
const [a, b] = [segment.start, segment.end];
if (pointInBox(a, box) || pointInBox(b, box)) return true;
return (
segmentsIntersect(a, b, [box.x1, box.y1], [box.x2, box.y1]) ||
segmentsIntersect(a, b, [box.x2, box.y1], [box.x2, box.y2]) ||
segmentsIntersect(a, b, [box.x2, box.y2], [box.x1, box.y2]) ||
segmentsIntersect(a, b, [box.x1, box.y2], [box.x1, box.y1])
);
}
export function segmentRectClearance(segment, rect) {
if (!segment || !rect) return null;
const { start, end } = segment;
if (!Array.isArray(start) || !Array.isArray(end) || start.length !== 2 || end.length !== 2) return null;
if (!isFinitePoint(start[0], start[1], end[0], end[1], rect.x, rect.y, rect.width, rect.height)) return null;
if (rect.width < 0 || rect.height < 0) return null;
if (segmentIntersectsRect(segment, rect)) return 0;
const right = rect.x + rect.width;
const bottom = rect.y + rect.height;
let clearance = Math.min(pointRectDistance(start, rect), pointRectDistance(end, rect));
const corners = [rect.x, rect.y, right, rect.y, right, bottom, rect.x, bottom];
for (let index = 0; index < 8; index += 2) {
const distance = pointSegmentDistanceXY(corners[index], corners[index + 1], start, end);
if (distance < clearance) clearance = distance;
}
return clearance;
}
// The same clearance, but the caller already knows the threshold it compares
// against: when an axis gap alone proves the distance cannot be smaller, the
// exact distance is never computed and Infinity is returned.
export function segmentRectClearanceWithin(segment, rect, limit) {
if (!segment || !rect) return segmentRectClearance(segment, rect);
const { start, end } = segment;
if (!Array.isArray(start) || !Array.isArray(end) || start.length !== 2 || end.length !== 2) return null;
if (!isFinitePoint(start[0], start[1], end[0], end[1], rect.x, rect.y, rect.width, rect.height)) return null;
if (rect.width < 0 || rect.height < 0) return null;
if (segmentIntersectsRect(segment, rect)) return 0;
const minX = Math.min(start[0], end[0]);
const maxX = Math.max(start[0], end[0]);
const minY = Math.min(start[1], end[1]);
const maxY = Math.max(start[1], end[1]);
const gapX = Math.max(rect.x - maxX, minX - (rect.x + rect.width));
const gapY = Math.max(rect.y - maxY, minY - (rect.y + rect.height));
if (Math.max(gapX, gapY) > limit) return Number.POSITIVE_INFINITY;
return segmentRectClearance(segment, rect);
}
export function segmentRectIntersectionLength(segment, rect) {
if (!segment || !rect) return null;
const { start, end } = segment;
if (!Array.isArray(start) || !Array.isArray(end) || start.length !== 2 || end.length !== 2) return null;
if (!isFinitePoint(...start, ...end, rect.x, rect.y, rect.width, rect.height)) return null;
if (rect.width < 0 || rect.height < 0) return null;
const dx = end[0] - start[0];
const dy = end[1] - start[1];
const length = Math.hypot(dx, dy);
if (length <= 0.0000001) return 0;
const bounds = [
[-dx, start[0] - rect.x],
[dx, rect.x + rect.width - start[0]],
[-dy, start[1] - rect.y],
[dy, rect.y + rect.height - start[1]],
];
let enter = 0;
let leave = 1;
for (const [direction, distance] of bounds) {
if (Math.abs(direction) <= 0.0000001) {
if (distance < -0.0000001) return 0;
continue;
}
const ratio = distance / direction;
if (direction < 0) enter = Math.max(enter, ratio);
else leave = Math.min(leave, ratio);
if (enter > leave + 0.0000001) return 0;
}
return length * Math.max(0, leave - enter);
}
const ROUTE_INDEX_CELL_SIZE = 128;
const ROUTE_INDEX_MAX_CELLS_PER_ROUTE = 256;
function routeBounds(route) {
let x1 = Infinity;
let y1 = Infinity;
let x2 = -Infinity;
let y2 = -Infinity;
for (const [x, y] of route.points) {
x1 = Math.min(x1, x);
y1 = Math.min(y1, y);
x2 = Math.max(x2, x);
y2 = Math.max(y2, y);
}
return { x1, y1, x2, y2 };
}
function createRouteCandidateIndex(routes) {
const cells = new Map();
const globalRouteIndexes = [];
routes.forEach((route, routeIndex) => {
const bounds = routeBounds(route);
const x1 = Math.floor(bounds.x1 / ROUTE_INDEX_CELL_SIZE);
const y1 = Math.floor(bounds.y1 / ROUTE_INDEX_CELL_SIZE);
const x2 = Math.floor(bounds.x2 / ROUTE_INDEX_CELL_SIZE);
const y2 = Math.floor(bounds.y2 / ROUTE_INDEX_CELL_SIZE);
if (![x1, y1, x2, y2].every(Number.isSafeInteger)) {
globalRouteIndexes.push(routeIndex);
return;
}
const cellCount = (x2 - x1 + 1) * (y2 - y1 + 1);
// Very long routes are cheaper to test once per label than to duplicate
// across a large part of the index.
if (!Number.isSafeInteger(cellCount) || cellCount > ROUTE_INDEX_MAX_CELLS_PER_ROUTE) {
globalRouteIndexes.push(routeIndex);
return;
}
for (let y = y1; y <= y2; y += 1) {
for (let x = x1; x <= x2; x += 1) {
const key = `${x}:${y}`;
const bucket = cells.get(key);
if (bucket) bucket.push(routeIndex);
else cells.set(key, [routeIndex]);
}
}
});
return function candidates(rect, threshold) {
const x1 = Math.floor((rect.x - threshold) / ROUTE_INDEX_CELL_SIZE);
const y1 = Math.floor((rect.y - threshold) / ROUTE_INDEX_CELL_SIZE);
const x2 = Math.floor((rect.x + rect.width + threshold) / ROUTE_INDEX_CELL_SIZE);
const y2 = Math.floor((rect.y + rect.height + threshold) / ROUTE_INDEX_CELL_SIZE);
const cellCount = (x2 - x1 + 1) * (y2 - y1 + 1);
// A huge threshold offers no selectivity and can overflow cell iteration.
if (![x1, y1, x2, y2].every(Number.isSafeInteger)
|| !Number.isSafeInteger(cellCount)
|| cellCount > Math.max(64, cells.size * 4)) return routes;
const routeIndexes = new Set(globalRouteIndexes);
for (let y = y1; y <= y2; y += 1) {
for (let x = x1; x <= x2; x += 1) {
for (const routeIndex of cells.get(`${x}:${y}`) || []) routeIndexes.add(routeIndex);
}
}
return [...routeIndexes]
.sort((left, right) => left - right)
.map((routeIndex) => routes[routeIndex]);
};
}
export function collectLabelRouteClearance({ labels, routedRelations, threshold }) {
if (!Number.isFinite(threshold) || threshold < 0) return [];
if (threshold === 0) return [];
const routeCandidates = asArray(routedRelations).map((entry, fallbackIndex) => {
const relation = entry?.relation || entry;
const points = normalizeRoutePoints(entry?.points || relation?.routePoints);
if (!relation || points.length < 2) return null;
return {
relation,
relationIndex: Number.isInteger(entry?.relationIndex) ? entry.relationIndex : fallbackIndex,
points,
};
}).filter(Boolean);
const seenRoutes = new Set();
const routes = routeCandidates.filter((route) => {
const identity = relationshipIdentity(route.relation, route.relationIndex);
if (seenRoutes.has(identity)) return false;
seenRoutes.add(identity);
return true;
});
const hits = [];
const seenLabels = new Set();
const candidateRoutes = createRouteCandidateIndex(routes);
for (const [fallbackIndex, label] of asArray(labels).entries()) {
const rect = label?.rect || label;
if (!rect || !isFinitePoint(rect.x, rect.y, rect.width, rect.height) || rect.width < 0 || rect.height < 0) continue;
const relationIndex = Number.isInteger(label?.relationIndex) ? label.relationIndex : fallbackIndex;
const labelIdentity = relationshipIdentity(label?.relation, relationIndex);
if (seenLabels.has(labelIdentity)) continue;
seenLabels.add(labelIdentity);
for (const route of candidateRoutes(rect, threshold)) {
if (relationIndex === route.relationIndex || sameRelationship(label?.relation, route.relation)) continue;
let nearest = null;
for (let segmentIndex = 0; segmentIndex < route.points.length - 1; segmentIndex += 1) {
const start = route.points[segmentIndex];
const end = route.points[segmentIndex + 1];
const clearance = segmentRectClearance({ start, end }, rect);
if (clearance == null) continue;
if (!nearest || clearance < nearest.clearance) {
nearest = {
clearance,
intersectionLength: segmentRectIntersectionLength({ start, end }, rect),
segmentIndex,
start,
end,
};
}
}
if (!nearest || nearest.clearance + 0.0001 >= threshold) continue;
hits.push({
label,
labelRelation: label?.relation,
labelRelationIndex: relationIndex,
otherRelation: route.relation,
otherRelationIndex: route.relationIndex,
rect,
...nearest,
threshold,
});
}
}
return hits;
}
export function minimumLabelRouteClearance(measurements) {
if (!asArray(measurements).length) return null;
const minimum = measurements.reduce(
(value, hit) => Math.min(value, hit.clearance),
Infinity,
);
return Math.round(minimum * 10) / 10;
}
function relationshipIdentity(relation, relationIndex) {
if (relation?.key !== undefined) return `key:${relation.key}`;
if (relation?.id) return `id:${relation.from || ''}\u0000${relation.to || ''}\u0000${relation.id}`;
return `index:${relationIndex}`;
}
function sameRelationship(left, right) {
if (!left || !right) return false;
if (left === right) return true;
if (left.key !== undefined && right.key !== undefined) return left.key === right.key;
return Boolean(left.id && right.id && left.id === right.id && left.from === right.from && left.to === right.to);
}
function relationshipSubject(diagramType, relationCollection, relationIndex, relation) {
return {
diagramType,
collection: relationCollection,
index: relationIndex,
...(relation?.id ? { id: relation.id } : {}),
...(relation?.from ? { from: relation.from } : {}),
...(relation?.to ? { to: relation.to } : {}),
};
}
const AUTHORED_PLAN_KEYS = ['route', 'via', 'channelX', 'channelY', 'fromSide', 'toSide', 'bias', 'labelAt', 'labelDx', 'labelDy', 'labelSegment'];
// Re-planning advice only applies when the failing relation actually carries
// authored controls; telling an author to remove controls that do not exist
// just sends them hunting for a field that was never written.
function rePlanHint(relations, fallback) {
const controls = new Set();
for (const relation of asArray(relations)) {
for (const key of AUTHORED_PLAN_KEYS) if (relation?.[key] !== undefined) controls.add(key);
}
if (!controls.size) return fallback;
return `if the authored ${[...controls].join('/')} are not required by the user, remove them so the renderer can re-plan; otherwise preserve that intent and ${fallback}`;
}
const ENDPOINT_SIDE_RULES = {
left: {
axis: 'horizontal',
sourceSign: -1,
targetSign: 1,
sourceDirection: 'leftward',
targetDirection: 'rightward from the left',
},
right: {
axis: 'horizontal',
sourceSign: 1,
targetSign: -1,
sourceDirection: 'rightward',
targetDirection: 'leftward from the right',
},
top: {
axis: 'vertical',
sourceSign: -1,
targetSign: 1,
sourceDirection: 'upward',
targetDirection: 'downward from above',
},
bottom: {
axis: 'vertical',
sourceSign: 1,
targetSign: -1,
sourceDirection: 'downward',
targetDirection: 'upward from below',
},
};
function endpointSideIssue(points, endpoint, side) {
const rule = ENDPOINT_SIDE_RULES[side];
if (!rule) return null;
const normalized = normalizeRoutePoints(points);
if (normalized.length < 2) return null;
const segmentIndex = endpoint === 'source' ? 0 : normalized.length - 2;
const start = normalized[segmentIndex];
const end = normalized[segmentIndex + 1];
const dx = end[0] - start[0];
const dy = end[1] - start[1];
const along = rule.axis === 'horizontal' ? dx : dy;
const across = rule.axis === 'horizontal' ? dy : dx;
const expectedSign = endpoint === 'source' ? rule.sourceSign : rule.targetSign;
if (Math.abs(across) <= 0.0001 && along * expectedSign > 0.0001) return null;
return {
endpoint,
side,
segmentIndex,
start,
end,
expectedAxis: rule.axis,
expectedDirection: endpoint === 'source' ? rule.sourceDirection : rule.targetDirection,
};
}
// A side is a direction contract, not just a point on a box border. This pure
// predicate lets automatic routers prefer a dogleg whose first and final
// segments leave/enter the chosen sides perpendicularly.
export function routeHonorsEndpointSides(points, fromSide, toSide) {
return !endpointSideIssue(points, 'source', fromSide)
&& !endpointSideIssue(points, 'target', toSide);
}
// Explicit fromSide/toSide are authored geometry, so a tangent or backwards
// endpoint segment changes their meaning. Fail this universally instead of
// leaving a malformed arrow for visual review to discover. Named routes and
// authored via points already carry their own geometry semantics: when they
// omit endpoint sides, do not invent a relative-position side and then reject
// the route for disagreeing with that invention. Pure automatic routes may
// still be checked against renderer-inferred sides.
export function cleanEndpointSideProblems({
relations,
endpointIds,
pathFor,
diagramType,
relationCollection,
fromSideFor,
toSideFor,
shouldCheckRelation = () => true,
routeHint = 'align the first/final via segment with fromSide/toSide, change the side, or remove explicit routing so auto can choose a perpendicular approach',
}) {
const problems = [];
for (const [relationIndex, relation] of asArray(relations).entries()) {
if (!relation || !endpointIds?.has(relation.from) || !endpointIds?.has(relation.to)) continue;
if (!shouldCheckRelation(relation, relationIndex)) continue;
const points = pathFor(relation)?.points;
if (!Array.isArray(points) || points.length < 2) continue;
const authoredFromSide = relation.fromSide && relation.fromSide !== 'auto' ? relation.fromSide : null;
const authoredToSide = relation.toSide && relation.toSide !== 'auto' ? relation.toSide : null;
const hasAuthoredRouteGeometry = Boolean(
(relation.route && relation.route !== 'auto') || Array.isArray(relation.via),
);
const inferredFromSide = !hasAuthoredRouteGeometry && typeof fromSideFor === 'function'
? fromSideFor(relation)
: null;
const inferredToSide = !hasAuthoredRouteGeometry && typeof toSideFor === 'function'
? toSideFor(relation)
: null;
const fromSide = authoredFromSide ?? inferredFromSide;
const toSide = authoredToSide ?? inferredToSide;
const checks = [
fromSide
? { ...endpointSideIssue(points, 'source', fromSide), sideOrigin: authoredFromSide ? 'authored' : 'inferred' }
: null,
toSide
? { ...endpointSideIssue(points, 'target', toSide), sideOrigin: authoredToSide ? 'authored' : 'inferred' }
: null,
].filter((issue) => issue?.endpoint);
for (const issue of checks) {
const relationId = relation.id ? ` id "${relation.id}"` : '';
const authoredField = issue.endpoint === 'source' ? 'fromSide' : 'toSide';
const sideField = issue.sideOrigin === 'inferred' ? `inferred ${authoredField}` : authoredField;
const segmentRole = issue.endpoint === 'source' ? 'first' : 'final';
const from = issue.start.map((value) => Math.round(value * 10) / 10).join(', ');
const to = issue.end.map((value) => Math.round(value * 10) / 10).join(', ');
const message = `[clean-flow/endpoint-side-direction] ${diagramType} ${relationCollection}[${relationIndex}]${relationId} "${relation.from}" -> "${relation.to}" ${segmentRole} segment ${issue.segmentIndex} [${from}] -> [${to}] does not honor ${sideField} "${issue.side}" — it must run ${issue.expectedAxis} ${issue.expectedDirection}; ${routeHint}.`;
recordDiagnostic({
code: 'clean-flow/endpoint-side-direction',
severity: 'error',
message,
subject: relationshipSubject(diagramType, relationCollection, relationIndex, relation),
evidence: {
endpoint: issue.endpoint,
authoredField,
sideOrigin: issue.sideOrigin,
side: issue.side,
segmentIndex: issue.segmentIndex,
from: issue.start,
to: issue.end,
expectedAxis: issue.expectedAxis,
expectedDirection: issue.expectedDirection,
},
supportedFixes: [routeHint],
});
problems.push(message);
}
}
return problems;
}
// One mechanical quality gate for every renderer-owned relationship path.
// A renderer supplies its semantic obstacle set; source/target boxes are
// always exempt because paths are expected to terminate on their boundaries.
// Containers, lifelines, and other intentionally pass-through geometry should
// simply not be supplied as obstacles.
export function cleanFlowProblems({
relations,
obstacles,
pathFor,
diagramType,
relationCollection,
obstacleKind,
clearance = 2,
routeHint = 'adjust fromSide/toSide, set route/via or channel coordinates, or move the obstacle'
}) {
// A relationship hidden behind an unrelated opaque node changes the
// diagram's meaning, so this is a correctness invariant rather than an
// opt-in composition preference. Keep it active even when the author omits
// quality_profile; standard/showcase still control stricter visual budgets.
const problems = [];
const obstacleList = [...obstacles];
const obstacleIds = new Set(obstacleList.map((obstacle) => obstacle?.id));
for (const [relationIndex, relation] of asArray(relations).entries()) {
if (!relation || typeof relation.from !== 'string' || typeof relation.to !== 'string') continue;
if (!obstacleIds.has(relation.from) || !obstacleIds.has(relation.to)) continue;
const points = pathFor(relation)?.points;
if (!Array.isArray(points) || points.length < 2) continue;
if (!points.every((point) => Array.isArray(point) && point.length === 2 && isFinitePoint(...point))) continue;
const endpointIds = new Set([relation.from, relation.to]);
for (const obstacle of obstacleList) {
if (!obstacle || endpointIds.has(obstacle.id)) continue;
if (!isFinitePoint(obstacle.x, obstacle.y, obstacle.width, obstacle.height)) continue;
let hitSegment = -1;
for (let segmentIndex = 0; segmentIndex < points.length - 1; segmentIndex += 1) {
if (segmentIntersectsRect({ start: points[segmentIndex], end: points[segmentIndex + 1] }, obstacle, clearance)) {
hitSegment = segmentIndex;
break;
}
}
if (hitSegment === -1) continue;
const from = points[hitSegment].map(Math.round).join(', ');
const to = points[hitSegment + 1].map(Math.round).join(', ');
const relationId = relation.id ? ` id "${relation.id}"` : '';
const hint = rePlanHint([relation], routeHint);
const message = `[clean-flow/edge-through-node] ${diagramType} ${relationCollection}[${relationIndex}]${relationId} "${relation.from}" -> "${relation.to}" crosses ${obstacleKind} "${obstacle.id}" (unrelated to this relationship) on segment ${hitSegment} [${from}] -> [${to}] (${clearance}px clearance) — ${hint}.`;
recordDiagnostic({
code: 'clean-flow/edge-through-node',
severity: 'error',
message,
subject: relationshipSubject(diagramType, relationCollection, relationIndex, relation),
evidence: {
obstacleKind,
obstacleId: obstacle.id,
segmentIndex: hitSegment,
from: points[hitSegment],
to: points[hitSegment + 1],
clearancePx: clearance,
},
supportedFixes: [hint],
});
problems.push(message);
}
}
return problems;
}
// Build a read-only analysis copy of a polyline with straight-through
// waypoints removed. A waypoint on a forward-collinear run is not a visual
// endpoint, so treating it as one would hide a proper X that lands exactly on
// that waypoint. Reversals and real bends stay split: their shared point can
// still be an authored touch rather than a crossing. The source points are
// retained on every merged segment so diagnostics can name the authored
// segment that contains a hit without changing rendered/receipt geometry.
export function forwardCollinearAnalysisSegments(points) {
const segments = [];
for (let segmentIndex = 0; segmentIndex < asArray(points).length - 1; segmentIndex += 1) {
const authoredStart = points[segmentIndex];
const authoredEnd = points[segmentIndex + 1];
const start = Array.isArray(authoredStart) ? [...authoredStart] : authoredStart;
const end = Array.isArray(authoredEnd) ? [...authoredEnd] : authoredEnd;
const sourceSegment = { start, end, segmentIndex };
const previous = segments.at(-1);
if (previous && segmentsContinueForward(previous.start, previous.end, start, end)) {
previous.end = end;
previous.sourceSegments.push(sourceSegment);
continue;
}
segments.push({
start,
end,
segmentIndex,
sourceSegments: [sourceSegment],
});
}
return segments;
}
export function sourceSegmentIndexAtPoint(segment, point) {
const source = asArray(segment?.sourceSegments).find(({ start, end }) => (
pointLiesOnSegment(point, start, end)
));
return source?.segmentIndex ?? segment?.segmentIndex ?? 0;
}
function authoredAnalysisSegments(points) {
return asArray(points).slice(0, -1).map((start, segmentIndex) => ({
start,
end: points[segmentIndex + 1],
segmentIndex,
sourceSegments: [{ start, end: points[segmentIndex + 1], segmentIndex }],
}));
}
function segmentsContinueForward(firstStart, firstEnd, secondStart, secondEnd) {
if (![firstStart, firstEnd, secondStart, secondEnd].every((point) => (
Array.isArray(point) && point.length === 2 && isFinitePoint(...point)
))) return false;
const epsilon = 0.0001;
if (Math.abs(firstEnd[0] - secondStart[0]) > epsilon
|| Math.abs(firstEnd[1] - secondStart[1]) > epsilon) return false;
const firstVector = [firstEnd[0] - firstStart[0], firstEnd[1] - firstStart[1]];
const secondVector = [secondEnd[0] - secondStart[0], secondEnd[1] - secondStart[1]];
const firstLength = Math.hypot(...firstVector);
const secondLength = Math.hypot(...secondVector);
if (firstLength <= epsilon || secondLength <= epsilon) return false;
const cross = firstVector[0] * secondVector[1] - firstVector[1] * secondVector[0];
if (Math.abs(cross) > epsilon) return false;
const dot = firstVector[0] * secondVector[0] + firstVector[1] * secondVector[1];
return dot > epsilon;
}
function pointLiesOnSegment(point, start, end) {
if (![point, start, end].every((candidate) => (
Array.isArray(candidate) && candidate.length === 2 && isFinitePoint(...candidate)
))) return false;
const epsilon = 0.0001;
const length = Math.hypot(end[0] - start[0], end[1] - start[1]);
if (length <= epsilon) return Math.hypot(point[0] - start[0], point[1] - start[1]) <= epsilon;
if (Math.abs(crossProduct(start, end, point)) > epsilon * length) return false;
return point[0] >= Math.min(start[0], end[0]) - epsilon
&& point[0] <= Math.max(start[0], end[0]) + epsilon
&& point[1] >= Math.min(start[1], end[1]) - epsilon
&& point[1] <= Math.max(start[1], end[1]) + epsilon;
}
// Authored shared endpoints retain their junction interpretation by default.
// Renderers can opt their automatic routes into proper interior X checks;
// endpoint touches and collinear trunks still are not proper crossings.
export function cleanCrossingProblems({
relations,
endpointIds,
pathFor,
diagramType,
relationCollection,
profile = 'standard',
profileIsAuthoritative = false,
mergeForwardCollinearWaypoints = false,
includeSharedEndpoints = () => false,
crossingResolved = () => false,
warnInStandard = false,
onDiagnostic = recordDiagnostic,
routeHint = 'adjust route/via or channel coordinates so the relationships use separate corridors'
}) {
const severity = qualityProfileForGate(profile, profileIsAuthoritative) === 'showcase' ? 'error' : 'warning';
if (severity === 'warning' && !warnInStandard) return [];
const routed = asArray(relations).map((relation, index) => {
if (!relation || !endpointIds.has(relation.from) || !endpointIds.has(relation.to)) return null;
const points = pathFor(relation)?.points;
if (!Array.isArray(points) || points.length < 2) return null;
if (!points.every((point) => Array.isArray(point) && point.length === 2 && isFinitePoint(...point))) return null;
return {
relation,
index,
points,
analysisSegments: mergeForwardCollinearWaypoints
? forwardCollinearAnalysisSegments(points)
: authoredAnalysisSegments(points),
};
}).filter(Boolean);
const problems = [];
for (let leftIndex = 0; leftIndex < routed.length; leftIndex += 1) {
const left = routed[leftIndex];
for (let rightIndex = leftIndex + 1; rightIndex < routed.length; rightIndex += 1) {
const right = routed[rightIndex];
if ([left.relation.from, left.relation.to].some((id) => id === right.relation.from || id === right.relation.to)
&& !includeSharedEndpoints(left.relation, right.relation)) continue;
let hit = null;
for (const leftSegment of left.analysisSegments) {
if (hit) break;
for (const rightSegment of right.analysisSegments) {
const point = properSegmentIntersection(
leftSegment.start,
leftSegment.end,
rightSegment.start,
rightSegment.end
);
if (point) {
hit = {
point,
leftSegment: sourceSegmentIndexAtPoint(leftSegment, point),
rightSegment: sourceSegmentIndexAtPoint(rightSegment, point),
};
break;
}
}
}
if (!hit) continue;
if (crossingResolved(left.relation, right.relation, hit)) continue;
const describe = ({ relation, index }) => {
const id = relation.id ? ` id "${relation.id}"` : '';
return `${relationCollection}[${index}]${id} "${relation.from}" -> "${relation.to}"`;
};
const point = hit.point.map((value) => Math.round(value * 10) / 10).join(', ');
const hint = rePlanHint([left.relation, right.relation], routeHint);
const message = `[composition/proper-crossing] ${severity === 'error' ? 'showcase' : 'standard'} ${diagramType} ${describe(left)} crosses ${describe(right)} at [${point}] (segments ${hit.leftSegment} and ${hit.rightSegment}) — ${hint}.`;
onDiagnostic({
code: 'composition/proper-crossing',
severity,
message,
subject: relationshipSubject(diagramType, relationCollection, left.index, left.relation),
evidence: {
otherRelationship: relationshipSubject(diagramType, relationCollection, right.index, right.relation),
point: hit.point,
segmentIndex: hit.leftSegment,
otherSegmentIndex: hit.rightSegment,
},
supportedFixes: [hint],
});
if (severity === 'error') problems.push(message);
}
}
return problems;
}
// Two unrelated relationships that occupy the same visible corridor can read
// as one authored branch or merge even when neither relationship crosses a
// node or forms a proper X. Keep authored shared endpoints exempt by default;
// automatic architecture routes opt in because they promise separate ports.
// Workflow v2 opts into shared-endpoint checks with a bounded terminal-trunk
// exception. Other callers keep their existing authored-junction contract.
// The counterflow-only opt-in serves older workflow exports without a root
// readable-v2 contract; full shared-endpoint checking takes precedence.
// Tiny overlaps below the route rhythm
// floor are ignored to avoid turning sub-pixel rounding into a quality debt.
export function collectAmbiguousCorridors({
routedRelations,
minOverlapPx = 8,
includeSharedEndpoints = () => false,
includeSharedEndpointCounterflow = () => false,
allowShortWorkflowTrunks = false,
}) {
const routed = asArray(routedRelations).map((entry, fallbackIndex) => {
const relation = entry?.relation;
if (!relation || typeof relation.from !== 'string' || typeof relation.to !== 'string') return null;
const points = normalizeRoutePoints(entry?.points);
if (points.length < 2) return null;
return {
relation,
relationIndex: Number.isInteger(entry.relationIndex) ? entry.relationIndex : fallbackIndex,
points,
};
}).filter(Boolean);
const hits = [];
for (let leftIndex = 0; leftIndex < routed.length; leftIndex += 1) {
const left = routed[leftIndex];
for (let rightIndex = leftIndex + 1; rightIndex < routed.length; rightIndex += 1) {
const right = routed[rightIndex];
const sharedEndpoint = [left.relation.from, left.relation.to].some((id) => id === right.relation.from || id === right.relation.to);
const counterflowOnly = sharedEndpoint && !includeSharedEndpoints(left.relation, right.relation);
if (counterflowOnly && !includeSharedEndpointCounterflow(left.relation, right.relation)) continue;
let longest = null;
for (let leftSegment = 0; leftSegment < left.points.length - 1; leftSegment += 1) {
for (let rightSegment = 0; rightSegment < right.points.length - 1; rightSegment += 1) {
const overlap = collinearAxisOverlap(
left.points[leftSegment],
left.points[leftSegment + 1],
right.points[rightSegment],
right.points[rightSegment + 1],
);
if (!overlap || overlap.length + 0.0001 < minOverlapPx) continue;
if (allowShortWorkflowTrunks && shortWorkflowTrunk(left, right, leftSegment, rightSegment, overlap.length)) continue;
if (counterflowOnly) {
const leftDelta = left.points[leftSegment + 1].map((value, axis) => value - left.points[leftSegment][axis]);
const rightDelta = right.points[rightSegment + 1].map((value, axis) => value - right.points[rightSegment][axis]);
if (leftDelta[0] * rightDelta[0] + leftDelta[1] * rightDelta[1] >= 0) continue;
}
if (!longest || overlap.length > longest.overlapLength + 0.0001) {
longest = {
left,
right,
leftSegment,
rightSegment,
overlapLength: overlap.length,
overlapStart: overlap.start,
overlapEnd: overlap.end,
};
}
}
}
if (longest) hits.push(longest);
}
}
return hits;
}
function shortWorkflowTrunk(left, right, leftSegment, rightSegment, length) {
if (length > 24 + 0.0001) return false;
const a = left.relation, b = right.relation;
const variant = (edge) => edge.variant || 'default';
const width = (edge) => edge.width || (variant(edge) === 'emphasis' ? 1.8 : 1.4);
if (variant(a) !== variant(b) || width(a) !== width(b) || (a.role || '') !== (b.role || '')) return false;
const same = (p, q) => Math.abs(p[0] - q[0]) < 0.0001 && Math.abs(p[1] - q[1]) < 0.0001;
const source = a.from === b.from && leftSegment === 0 && rightSegment === 0
&& same(left.points[0], right.points[0]);
const target = a.to === b.to && leftSegment === left.points.length - 2 && rightSegment === right.points.length - 2
&& same(left.points.at(-1), right.points.at(-1));
if (!source && !target) return false;
const p = left.points[leftSegment], q = left.points[leftSegment + 1];
const r = right.points[rightSegment], s = right.points[rightSegment + 1];
return (q[0] - p[0]) * (s[0] - r[0]) + (q[1] - p[1]) * (s[1] - r[1]) > 0;
}
// Bundled arrow markers are 7 stroke-widths across the direction of travel.
// Callers select the automatic routes they own; explicit junctions are preserved.
export function collectArrowheadCollisions({ routedRelations, allowShortWorkflowTrunks = false }) {
const incoming = new Map();
const hits = [];
for (const entry of asArray(routedRelations)) {
const points = normalizeRoutePoints(entry.points);
if (points.length < 2 || !entry.relation?.to) continue;
const tip = points.at(-1);
const previous = points.at(-2);
const vertical = Math.abs(tip[0] - previous[0]) < 0.0001;
const axis = vertical ? 0 : 1;
const direction = Math.sign(tip[1 - axis] - previous[1 - axis]);
const halfWidth = 3.5 * (entry.relation.width || (entry.relation.variant === 'emphasis' ? 1.8 : 1.5));
const key = `${entry.relation.to}\u0000${axis}\u0000${direction}`;
const siblings = incoming.get(key) || [];
const current = { ...entry, tip, halfWidth };
for (const sibling of siblings) {
if (Math.abs(tip[1 - axis] - sibling.tip[1 - axis]) > 0.0001) continue;
const distance = Math.abs(tip[axis] - sibling.tip[axis]);
const minimum = halfWidth + sibling.halfWidth;
if (allowShortWorkflowTrunks) {
const left = { ...sibling, points: normalizeRoutePoints(sibling.points) };
const right = { ...entry, points };
const overlap = collinearAxisOverlap(left.points.at(-2), left.points.at(-1), points.at(-2), tip);
if (overlap && shortWorkflowTrunk(left, right, left.points.length - 2, points.length - 2, overlap.length)) continue;
}
if (distance < minimum - 0.0001) hits.push({ left: sibling, right: current, distance, minimum });
}
siblings.push(current);
incoming.set(key, siblings);
}
return hits;
}
export function cleanAmbiguousCorridorProblems({
relations,
endpointIds,
pathFor,
diagramType,
relationCollection,
profile = 'standard',
profileIsAuthoritative = false,
routeHint = 'adjust route/via or channel coordinates so the relationships use separate corridors',
minOverlapPx = 8,
includeSharedEndpoints = () => false,
includeSharedEndpointCounterflow = () => false,
allowShortWorkflowTrunks = false,
onDiagnostic = recordDiagnostic,
}) {
const severity = qualityProfileForGate(profile, profileIsAuthoritative) === 'showcase' ? 'error' : 'warning';
if (severity === 'warning' && !allowShortWorkflowTrunks) return [];
const routedRelations = collectEligibleRoutedRelations({ relations, endpointIds, pathFor });
return collectAmbiguousCorridors({ routedRelations, minOverlapPx, includeSharedEndpoints, includeSharedEndpointCounterflow, allowShortWorkflowTrunks }).map((hit) => {
const describe = ({ relation, relationIndex }) => {
const id = relation.id ? ` id "${relation.id}"` : '';
return `${relationCollection}[${relationIndex}]${id} "${relation.from}" -> "${relation.to}"`;
};
const length = Math.round(hit.overlapLength * 10) / 10;
const from = hit.overlapStart.map((value) => Math.round(value * 10) / 10).join(', ');
const to = hit.overlapEnd.map((value) => Math.round(value * 10) / 10).join(', ');
const hint = rePlanHint([hit.left.relation, hit.right.relation], routeHint);
const message = `[composition/ambiguous-corridor] ${severity === 'error' ? 'showcase' : 'standard'} ${diagramType} ${describe(hit.left)} shares a ${length}px corridor with ${describe(hit.right)} at [${from}] -> [${to}] (segments ${hit.leftSegment} and ${hit.rightSegment}; minimum ${minOverlapPx}px) — ${hint}.`;
onDiagnostic({
code: 'composition/ambiguous-corridor',
severity,
message,
subject: relationshipSubject(diagramType, relationCollection, hit.left.relationIndex, hit.left.relation),
evidence: {
otherRelationship: relationshipSubject(diagramType, relationCollection, hit.right.relationIndex, hit.right.relation),
overlapLengthPx: length,
minimumPx: minOverlapPx,
from: hit.overlapStart,
to: hit.overlapEnd,
segmentIndex: hit.leftSegment,
otherSegmentIndex: hit.rightSegment,
},
supportedFixes: [hint],
});
return severity === 'error' ? message : null;
}).filter(Boolean);
}
// Relationship paths may cross a structural frame, but they must not borrow a
// frame side as a routing corridor. Rounded rectangle corners are trimmed from
// the modeled straight sides so a short corner touch is not mistaken for a
// border run. Any positive straight overlap beyond the numeric epsilon is a
// hard failure in every quality profile; 16px belongs only to the separate,
// neutral short-segment metric and is not a corridor exemption.
export function collectBorderRuns({ routedRelations, frames }) {
const hits = [];
for (const routed of asArray(routedRelations)) {
const routeSegments = Array.isArray(routed?.segments)
? routed.segments
: asArray(routed?.points).slice(0, -1).map((start, index) => ({ start, end: routed.points[index + 1] }));
if (!routeSegments.length) continue;
if (!routeSegments.every((segment) => (
Array.isArray(segment?.start) && segment.start.length === 2 && isFinitePoint(...segment.start)
&& Array.isArray(segment?.end) && segment.end.length === 2 && isFinitePoint(...segment.end)
))) continue;
for (const [frameIndex, frame] of asArray(frames).entries()) {
for (const border of frameBorderSegments(frame)) {
const overlaps = [];
for (let segmentIndex = 0; segmentIndex < routeSegments.length; segmentIndex += 1) {
const segment = routeSegments[segmentIndex];
const overlap = collinearAxisOverlap(
segment.start,
segment.end,
border.start,
border.end,
);
if (!overlap || overlap.length <= 0.0001) continue;
overlaps.push({ ...overlap, segmentIndex });
}
if (!overlaps.length) continue;
const merged = mergeBorderOverlaps(overlaps, border);
const longest = [...merged].sort((left, right) => right.length - left.length || left.low - right.low)[0];
hits.push({
...routed,
frame,
frameIndex,
side: border.side,
segmentIndex: overlaps.reduce((min, overlap) => Math.min(min, overlap.segmentIndex), Infinity),
overlapLength: merged.reduce((total, overlap) => total + overlap.length, 0),
overlapStart: longest.start,
overlapEnd: longest.end,
});
}
}
}
return hits;
}
export function cleanBorderRunProblems({
relations,
endpointIds,
frames,
pathFor,
diagramType,
relationCollection,
profile,
profileIsAuthoritative = false,
routeHint = 'adjust route/via or channel coordinates so the relationship crosses the frame perpendicularly through a clear opening'
}) {
if (!qualityProfileForGate(profile, profileIsAuthoritative)) return [];
const routedRelations = collectEligibleRoutedRelations({ relations, endpointIds, pathFor });
return collectBorderRuns({ routedRelations, frames }).map((hit) => {
const relation = hit.relation || {};
const relationId = relation.id ? ` id "${relation.id}"` : '';
const frameKind = hit.frame?.kind || hit.frame?.shape || 'frame';
const frameIdentity = hit.frame?.label || hit.frame?.id || hit.frameIndex;
const length = Math.round(hit.overlapLength * 10) / 10;
const from = hit.overlapStart.map((value) => Math.round(value * 10) / 10).join(', ');
const to = hit.overlapEnd.map((value) => Math.round(value * 10) / 10).join(', ');
const hint = rePlanHint([relation], routeHint);
const message = `[composition/container-border-run] ${diagramType} ${relationCollection}[${hit.relationIndex}]${relationId} "${relation.from}" -> "${relation.to}" follows ${frameKind} "${frameIdentity}" ${hit.side} border for ${length}px on segment ${hit.segmentIndex} [${from}] -> [${to}] — ${hint}.`;
recordDiagnostic({
code: 'composition/container-border-run',
severity: 'error',
message,
subject: relationshipSubject(diagramType, relationCollection, hit.relationIndex, relation),
evidence: {
frameKind,
frameId: hit.frame?.id,
frameLabel: hit.frame?.label,
side: hit.side,
segmentIndex: hit.segmentIndex,
overlapLengthPx: length,
from: hit.overlapStart,
to: hit.overlapEnd,
},
supportedFixes: [hint],
});
return message;
});
}
export function routeBudgetMetrics({
routedRelations,
bendsPerRelationship = 2,
stretch = 1.35,
segmentPx = 16,
microSegmentPx = 8,
}) {
let maxBends = 0;
let routesOverSuggestedBends = 0;
let maxStretch = null;
let routesOverSuggestedStretch = 0;
let minSegmentPx = null;
let minInteriorSegmentPx = null;
let shortSegmentCount = 0;
let shortEndpointSegmentCount = 0;
let shortInteriorSegmentCount = 0;
let microSegmentCount = 0;
for (const routed of asArray(routedRelations)) {
const points = normalizeRoutePoints(routed?.points);
if (points.length < 2) continue;
const bends = Math.max(0, points.length - 2);
maxBends = Math.max(maxBends, bends);
if (bends > bendsPerRelationship) routesOverSuggestedBends += 1;
let routeLength = 0;
for (let index = 0; index < points.length - 1; index += 1) {
const length = Math.abs(points[index + 1][0] - points[index][0]) + Math.abs(points[index + 1][1] - points[index][1]);
if (length <= 0.0001) continue;
const position = segmentPosition(index, points.length - 1);
routeLength += length;
minSegmentPx = minSegmentPx == null ? length : Math.min(minSegmentPx, length);
if (position === 'interior') {
minInteriorSegmentPx = minInteriorSegmentPx == null ? length : Math.min(minInteriorSegmentPx, length);
}
if (length < segmentPx) {
shortSegmentCount += 1;
if (position === 'interior') shortInteriorSegmentCount += 1;
else shortEndpointSegmentCount += 1;
}
if (length < microSegmentPx) microSegmentCount += 1;
}
const direct = Math.abs(points.at(-1)[0] - points[0][0]) + Math.abs(points.at(-1)[1] - points[0][1]);
if (direct > 0.0001) {
const routeStretch = routeLength / direct;
maxStretch = maxStretch == null ? routeStretch : Math.max(maxStretch, routeStretch);
if (routeStretch > stretch + 0.0001) routesOverSuggestedStretch += 1;
}
}
return {
maxBends,
routesOverSuggestedBends,
maxStretch,
routesOverSuggestedStretch,
minSegmentPx,
minInteriorSegmentPx,
shortSegmentCount,
shortEndpointSegmentCount,
shortInteriorSegmentCount,
microSegmentCount,
};
}
export function collectRouteRhythmIssues({
routedRelations,
interiorSegmentPx = 16,
microSegmentPx = 8,
}) {
const issues = [];
for (const [fallbackIndex, routed] of asArray(routedRelations).entries()) {
const points = normalizeRoutePoints(routed?.points);
if (points.length < 2) continue;
for (let segmentIndex = 0; segmentIndex < points.length - 1; segmentIndex += 1) {
const start = points[segmentIndex];
const end = points[segmentIndex + 1];
const length = Math.abs(end[0] - start[0]) + Math.abs(end[1] - start[1]);
if (length <= 0.0001) continue;
const position = segmentPosition(segmentIndex, points.length - 1);
const code = length < microSegmentPx - 0.0001
? 'composition/micro-segment'
: position === 'interior' && length < interiorSegmentPx - 0.0001
? 'composition/short-interior-segment'
: null;
if (!code) continue;
issues.push({
code,
relation: routed.relation,
relationIndex: Number.isInteger(routed.relationIndex) ? routed.relationIndex : fallbackIndex,
segmentIndex,
position,
length,
start,
end,
});
}
}
return issues;
}
export function cleanRouteRhythmProblems({
relations,
endpointIds,
pathFor,
diagramType,
relationCollection,
profile,
profileIsAuthoritative = false,
routeHint = 'move the channel/via point to remove the cramped turn or give the route more corridor space',
interiorSegmentPx = 16,
microSegmentPx = 8,
}) {
if (qualityProfileForGate(profile, profileIsAuthoritative) !== 'showcase') return [];
const routedRelations = collectEligibleRoutedRelations({ relations, endpointIds, pathFor });
return collectRouteRhythmIssues({ routedRelations, interiorSegmentPx, microSegmentPx }).map((hit) => {
const relation = hit.relation || {};
const relationId = relation.id ? ` id "${relation.id}"` : '';
const length = Math.round(hit.length * 10) / 10;
const from = hit.start.map((value) => Math.round(value * 10) / 10).join(', ');
const to = hit.end.map((value) => Math.round(value * 10) / 10).join(', ');
const rule = hit.code === 'composition/micro-segment'
? `is below the ${microSegmentPx}px micro-segment floor`
: `is below the ${interiorSegmentPx}px interior-segment floor`;
const hint = rePlanHint([relation], routeHint);
const message = `[${hit.code}] showcase ${diagramType} ${relationCollection}[${hit.relationIndex}]${relationId} "${relation.from}" -> "${relation.to}" has a ${length}px ${hit.position} segment ${hit.segmentIndex} [${from}] -> [${to}] that ${rule} — ${hint}.`;
recordDiagnostic({
code: hit.code,
severity: 'error',
message,
subject: relationshipSubject(diagramType, relationCollection, hit.relationIndex, relation),
evidence: {
segmentIndex: hit.segmentIndex,
position: hit.position,
lengthPx: length,
minimumPx: hit.code === 'composition/micro-segment' ? microSegmentPx : interiorSegmentPx,
from: hit.start,
to: hit.end,
},
supportedFixes: [hint],
});
return message;
});
}
export function cleanLabelRouteClearanceProblems({
relations,
labels,
endpointIds,
pathFor,
diagramType,
relationCollection,
profile,
profileIsAuthoritative = false,
threshold = 4,
routeHint = 'adjust labelAt, labelDx, labelDy, or labelSegment; otherwise adjust the other relationship route/via/channel',
}) {
if (qualityProfileForGate(profile, profileIsAuthoritative) !== 'showcase') return [];
const routedRelations = collectEligibleRoutedRelations({ relations, endpointIds, pathFor });
return collectLabelRouteClearance({ labels, routedRelations, threshold }).map((hit) => {
const describe = (relation, relationIndex) => {
const relationId = relation?.id ? ` id "${relation.id}"` : '';
const relationLabel = relation?.label ? ` label "${relation.label}"` : '';
return `${relationCollection}[${relationIndex}]${relationId} "${relation?.from}" -> "${relation?.to}"${relationLabel}`;
};
const clearance = Math.round(hit.clearance * 10) / 10;
const from = hit.start.map((value) => Math.round(value * 10) / 10).join(', ');
const to = hit.end.map((value) => Math.round(value * 10) / 10).join(', ');
const hint = rePlanHint([hit.labelRelation, hit.otherRelation], routeHint);
const message = `[composition/label-route-clearance] showcase ${diagramType} label "${hit.label?.label || hit.labelRelation?.label || ''}" on ${describe(hit.labelRelation, hit.labelRelationIndex)} is ${clearance}px from ${describe(hit.otherRelation, hit.otherRelationIndex)} segment ${hit.segmentIndex} [${from}] -> [${to}] (label rect ${formatRect(hit.rect)}; minimum ${threshold}px) — ${hint}.`;
recordDiagnostic({
code: 'composition/label-route-clearance',
severity: 'error',
message,
subject: relationshipSubject(diagramType, relationCollection, hit.labelRelationIndex, hit.labelRelation),
evidence: {
label: hit.label?.label || hit.labelRelation?.label || '',
otherRelationship: relationshipSubject(diagramType, relationCollection, hit.otherRelationIndex, hit.otherRelation),
segmentIndex: hit.segmentIndex,
clearancePx: clearance,
minimumPx: threshold,
labelRect: hit.rect,
from: hit.start,
to: hit.end,
},
supportedFixes: [hint],
});
return message;
});
}
// How far [start, start + size) leaves [0, extent), per end of one axis. This
// is the single definition of "inside the canvas" that both the containment
// rule and the repair hints measure against; an unknown extent bounds nothing.
function axisCanvasOverflow(start, size, extent, origin = 0) {
if (!Number.isFinite(extent)) return { start: 0, end: 0 };
return { start: origin - start, end: start + size - (origin + extent) };
}
// THE CANVAS CONTAINMENT RATIONALE (referenced from the other call sites).
//
// The SVG canvas clips whatever leaves the viewBox, so an edge label that
// overhangs an edge ships as truncated text while every post-render check on
// the emitted markup still passes: clipped text is still well-formed markup.
// Renderers with a fixed canvas already bound their nodes, lanes, and legends
// against it; edge label rects were the exception.
//
// Not applied to readable-v2 workflows: that compiler grows its canvas around
// pinned label rects and rejects an authored viewBox that cannot hold the
// result, so the only gap growth cannot close is the origin its own rule
// already guards. Architecture's auto canvas grows the same way, which leaves
// this rule reporting authored viewBoxes and the origin side.
//
// Showcase only: a standard document authored before the rule exists may
// overhang by a few pixels, and failing it there would break compatibility
// instead of repairing a diagram.
export function collectLabelCanvasOverflow({ labels, viewBox, tolerance = 0.5 }) {
// Renderers author origin-zero canvases (meta.viewBox is [width, height] by
// schema), but `check` re-measures foreign artifacts whose SVG viewBox may
// carry a legal non-zero min-x/min-y; those pass all four numbers.
const box = asArray(viewBox);
const [originX, originY, canvasWidth, canvasHeight] = box.length === 4 ? box : [0, 0, box[0], box[1]];
if (!isFinitePoint(originX, originY, canvasWidth, canvasHeight)) return [];
const hits = [];
for (const [fallbackIndex, label] of asArray(labels).entries()) {
const rect = label?.rect || label;
if (!rect || !isFinitePoint(rect.x, rect.y, rect.width, rect.height)) continue;
// `check` parses foreign markup, so a malformed negative-size rect is
// skipped like the other label collectors do — its flipped interval would
// otherwise read as contained.
if (rect.width < 0 || rect.height < 0) continue;
const horizontal = axisCanvasOverflow(rect.x, rect.width, canvasWidth, originX);
const vertical = axisCanvasOverflow(rect.y, rect.height, canvasHeight, originY);
const overflow = {
left: horizontal.start,
right: horizontal.end,
top: vertical.start,
bottom: vertical.end,
};
const sides = Object.keys(overflow).filter((side) => overflow[side] > tolerance);
if (!sides.length) continue;
hits.push({
label,
relation: label?.relation,
relationIndex: Number.isInteger(label?.relationIndex) ? label.relationIndex : fallbackIndex,
rect,
viewBox: [canvasWidth, canvasHeight],
viewBoxOrigin: [originX, originY],
sides,
overflowPx: Object.fromEntries(sides.map((side) => [side, Math.round(overflow[side] * 10) / 10])),
tolerance,
});
}
return hits;
}
export function describeLabelCanvasOverflow(hit) {
return hit.sides.map((side) => `${side} edge by ${hit.overflowPx[side]}px`).join(' and ');
}
export function cleanLabelCanvasContainmentProblems({
labels,
viewBox,
diagramType,
relationCollection,
profile,
profileIsAuthoritative = false,
routeHint = 'adjust labelAt, labelDx, labelDy, or labelSegment; otherwise enlarge meta.viewBox',
// Label widths are estimated from the text, not measured, so sub-pixel
// overhang is rounding noise rather than a visible truncation.
tolerance = 0.5,
}) {
if (qualityProfileForGate(profile, profileIsAuthoritative) !== 'showcase') return [];
return collectLabelCanvasOverflow({ labels, viewBox, tolerance }).map((hit) => {
const relation = hit.relation;
const relationId = relation?.id ? ` id "${relation.id}"` : '';
const labelText = hit.label?.label || relation?.label || '';
const hint = rePlanHint([relation], routeHint);
const message = `[composition/label-canvas-containment] showcase ${diagramType} label "${labelText}" on ${relationCollection}[${hit.relationIndex}]${relationId} "${relation?.from}" -> "${relation?.to}" extends past the ${describeLabelCanvasOverflow(hit)} (label rect ${formatRect(hit.rect)}; viewBox ${hit.viewBox[0]}x${hit.viewBox[1]}) — ${hint}.`;
recordDiagnostic({
code: 'composition/label-canvas-containment',
severity: 'error',
message,
subject: relationshipSubject(diagramType, relationCollection, hit.relationIndex, relation),
evidence: {
label: labelText,
labelRect: { x: hit.rect.x, y: hit.rect.y, width: hit.rect.width, height: hit.rect.height },
viewBox: hit.viewBox,
overflowPx: hit.overflowPx,
tolerancePx: hit.tolerance,
},
supportedFixes: [hint],
});
return message;
});
}
function qualityProfileForGate(profile, profileIsAuthoritative) {
return profileIsAuthoritative
? profile
: process.env.ARCHIFY_QUALITY_PROFILE || profile;
}
function collectEligibleRoutedRelations({ relations, endpointIds, pathFor }) {
return asArray(relations).map((relation, relationIndex) => {
if (!relation || typeof relation.from !== 'string' || typeof relation.to !== 'string') return null;
if (endpointIds && (!endpointIds.has(relation.from) || !endpointIds.has(relation.to))) return null;
return { relation, relationIndex, points: pathFor(relation)?.points };
}).filter(Boolean);
}
function segmentPosition(index, segmentCount) {
if (index === 0) return 'source-stub';
if (index === segmentCount - 1) return 'target-stub';
return 'interior';
}
// Normalizing a route is pure, and the same route array is normalized again by
// every predicate that inspects it. Keyed by the array itself, so a rebuilt
// route simply gets a new entry. The result's outer array is frozen. Callers
// must also treat input arrays and their coordinate pairs as immutable, since
// edits in place cannot invalidate this identity-based cache.
const NORMALIZED_ROUTE_POINTS = new WeakMap();
// Assembling a route from an anchor, corridor points and an anchor is the same
// normalization without the intermediate array, and the result is seeded in the
// cache so later predicates do not normalize it again.
export function joinRoutePoints(start, via, end) {
const normalized = [];
const accept = (point) => {
if (!Array.isArray(point) || point.length !== 2 || !isFinitePoint(point[0], point[1])) return;
const previous = normalized.at(-1);
if (previous
&& Math.abs(point[0] - previous[0]) <= 0.0001
&& Math.abs(point[1] - previous[1]) <= 0.0001) return;
while (normalized.length >= 2 && collinearForward(normalized.at(-2), normalized.at(-1), point)) normalized.pop();
normalized.push(point);
};
accept(start);
for (const point of Array.isArray(via) ? via : []) accept(point);
accept(end);
Object.freeze(normalized);
NORMALIZED_ROUTE_POINTS.set(normalized, normalized);
return normalized;
}
export function normalizeRoutePoints(points) {
if (Array.isArray(points)) {
const cached = NORMALIZED_ROUTE_POINTS.get(points);
if (cached) return cached;
}
const normalized = [];
for (const point of Array.isArray(points) ? points : []) {
if (!Array.isArray(point) || point.length !== 2 || !isFinitePoint(point[0], point[1])) continue;
const previous = normalized.at(-1);
if (previous
&& Math.abs(point[0] - previous[0]) <= 0.0001
&& Math.abs(point[1] - previous[1]) <= 0.0001) continue;
while (normalized.length >= 2 && collinearForward(normalized.at(-2), normalized.at(-1), point)) normalized.pop();
normalized.push(point);
}
if (Array.isArray(points)) {
Object.freeze(normalized);
NORMALIZED_ROUTE_POINTS.set(points, normalized);
}
return normalized;
}
function pointRectDistance(point, rect) {
const dx = Math.max(rect.x - point[0], 0, point[0] - (rect.x + rect.width));
const dy = Math.max(rect.y - point[1], 0, point[1] - (rect.y + rect.height));
return Math.hypot(dx, dy);
}
function pointSegmentDistanceXY(px, py, start, end) {
const dx = end[0] - start[0];
const dy = end[1] - start[1];
const lengthSquared = dx * dx + dy * dy;
if (lengthSquared <= 0.0000001) return Math.hypot(px - start[0], py - start[1]);
const t = Math.max(0, Math.min(1, ((px - start[0]) * dx + (py - start[1]) * dy) / lengthSquared));
return Math.hypot(px - (start[0] + t * dx), py - (start[1] + t * dy));
}
function pointSegmentDistance(point, start, end) {
return pointSegmentDistanceXY(point[0], point[1], start, end);
}
function collinearForward(a, b, c) {
if (Math.abs(crossProduct(a, b, c)) > 0.0001) return false;
return (b[0] - a[0]) * (c[0] - b[0]) + (b[1] - a[1]) * (c[1] - b[1]) >= -0.0001;
}
export function frameBorderSegments(frame) {
if (!frame || typeof frame !== 'object') return [];
if (frame.shape === 'line') {
const start = frame.start || [frame.x1, frame.y1];
const end = frame.end || [frame.x2, frame.y2];
return isFinitePoint(...start, ...end) ? [{ side: 'line', start, end }] : [];
}
if (!isFinitePoint(frame.x, frame.y, frame.width, frame.height) || frame.width <= 0 || frame.height <= 0) return [];
const radius = Math.max(0, Math.min(Number(frame.radius) || 0, frame.width / 2, frame.height / 2));
const left = frame.x;
const right = frame.x + frame.width;
const top = frame.y;
const bottom = frame.y + frame.height;
return [
{ side: 'top', start: [left + radius, top], end: [right - radius, top] },
{ side: 'right', start: [right, top + radius], end: [right, bottom - radius] },
{ side: 'bottom', start: [right - radius, bottom], end: [left + radius, bottom] },
{ side: 'left', start: [left, bottom - radius], end: [left, top + radius] },
].filter(({ start, end }) => Math.hypot(end[0] - start[0], end[1] - start[1]) > 0.0001);
}
function mergeBorderOverlaps(overlaps, border) {
const horizontal = Math.abs(border.start[1] - border.end[1]) <= 0.0001;
const axis = horizontal ? 0 : 1;
const fixed = horizontal ? border.start[1] : border.start[0];
const sorted = overlaps.map((overlap) => ({
low: Math.min(overlap.start[axis], overlap.end[axis]),
high: Math.max(overlap.start[axis], overlap.end[axis]),
})).sort((left, right) => left.low - right.low || left.high - right.high);
const merged = [];
for (const interval of sorted) {
const previous = merged.at(-1);
if (previous && interval.low <= previous.high + 0.0001) previous.high = Math.max(previous.high, interval.high);
else merged.push({ ...interval });
}
return merged.map((interval) => ({
...interval,
length: interval.high - interval.low,
start: horizontal ? [interval.low, fixed] : [fixed, interval.low],
end: horizontal ? [interval.high, fixed] : [fixed, interval.high],
}));
}
function collinearAxisOverlap(a, b, c, d) {
const epsilon = 0.0001;
const horizontal = Math.abs(a[1] - b[1]) <= epsilon
&& Math.abs(c[1] - d[1]) <= epsilon
&& Math.abs(a[1] - c[1]) <= epsilon;
const vertical = Math.abs(a[0] - b[0]) <= epsilon
&& Math.abs(c[0] - d[0]) <= epsilon
&& Math.abs(a[0] - c[0]) <= epsilon;
if (!horizontal && !vertical) return null;
const axis = horizontal ? 0 : 1;
const low = Math.max(Math.min(a[axis], b[axis]), Math.min(c[axis], d[axis]));
const high = Math.min(Math.max(a[axis], b[axis]), Math.max(c[axis], d[axis]));
if (high - low <= epsilon) return null;
const fixed = horizontal ? a[1] : a[0];
return {
length: high - low,
start: horizontal ? [low, fixed] : [fixed, low],
end: horizontal ? [high, fixed] : [fixed, high],
};
}
export function properSegmentIntersection(a, b, c, d) {
const abC = crossProduct(a, b, c);
const abD = crossProduct(a, b, d);
const cdA = crossProduct(c, d, a);
const cdB = crossProduct(c, d, b);
const epsilon = 0.0001;
const opposite = (left, right) => (left > epsilon && right < -epsilon) || (left < -epsilon && right > epsilon);
if (!opposite(abC, abD) || !opposite(cdA, cdB)) return null;
const denominator = (a[0] - b[0]) * (c[1] - d[1]) - (a[1] - b[1]) * (c[0] - d[0]);
if (Math.abs(denominator) < epsilon) return null;
const ab = a[0] * b[1] - a[1] * b[0];
const cd = c[0] * d[1] - c[1] * d[0];
return [
(ab * (c[0] - d[0]) - (a[0] - b[0]) * cd) / denominator,
(ab * (c[1] - d[1]) - (a[1] - b[1]) * cd) / denominator
];
}
function crossProduct(a, b, c) {
return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
}
function pointInBox(point, box) {
return point[0] >= box.x1 && point[0] <= box.x2 && point[1] >= box.y1 && point[1] <= box.y2;
}
function segmentsIntersect(a, b, c, d) {
const o1 = orientation(a, b, c);
const o2 = orientation(a, b, d);
const o3 = orientation(c, d, a);
const o4 = orientation(c, d, b);
if (o1 === 0 && onSegment(a, c, b)) return true;
if (o2 === 0 && onSegment(a, d, b)) return true;
if (o3 === 0 && onSegment(c, a, d)) return true;
if (o4 === 0 && onSegment(c, b, d)) return true;
return o1 !== o2 && o3 !== o4;
}
function orientation(a, b, c) {
const value = (b[1] - a[1]) * (c[0] - b[0]) - (b[0] - a[0]) * (c[1] - b[1]);
if (Math.abs(value) < 0.0001) return 0;
return value > 0 ? 1 : 2;
}
function onSegment(a, b, c) {
return (
b[0] <= Math.max(a[0], c[0]) &&
b[0] >= Math.min(a[0], c[0]) &&
b[1] <= Math.max(a[1], c[1]) &&
b[1] >= Math.min(a[1], c[1])
);
}
export function anchor(rect, side) {
switch (side) {
case 'left': return [rect.x, rect.cy];
case 'right': return [rect.x + rect.width, rect.cy];
case 'top': return [rect.cx, rect.y];
case 'bottom': return [rect.cx, rect.y + rect.height];
default:
return [rect.x + rect.width, rect.cy];
}
}
const PORT_OUTWARD_VECTOR = {
left: [-1, 0],
right: [1, 0],
top: [0, -1],
bottom: [0, 1],
};
// Automatic port spreading can put otherwise parallel anchors only a few
// pixels apart. A conventional midpoint dogleg then violates the renderer's
// own 8px/16px route-rhythm floors. Return a full outside-channel route when
// that happens, or null when the normal automatic route remains appropriate.
export function automaticPortRhythmBridge(
start,
end,
fromSide,
toSide,
{ endpointStubPx = 24, interiorSegmentPx = 16, accept } = {},
) {
if (!Array.isArray(start) || !Array.isArray(end)
|| start.length !== 2 || end.length !== 2
|| !isFinitePoint(...start, ...end)) return null;
const fromVector = PORT_OUTWARD_VECTOR[fromSide];
const toVector = PORT_OUTWARD_VECTOR[toSide];
if (!fromVector || !toVector) return null;
const opposedFacingGap = (
(fromSide === 'right' && toSide === 'left' && end[0] > start[0])
|| (fromSide === 'left' && toSide === 'right' && start[0] > end[0])
) ? Math.abs(end[0] - start[0]) : (
(fromSide === 'bottom' && toSide === 'top' && end[1] > start[1])
|| (fromSide === 'top' && toSide === 'bottom' && start[1] > end[1])
) ? Math.abs(end[1] - start[1]) : null;
const boundedStubPx = opposedFacingGap != null
&& opposedFacingGap - endpointStubPx * 2 < interiorSegmentPx
? Math.max(8, Math.min(endpointStubPx, (opposedFacingGap - interiorSegmentPx) / 2))
: null;
const stubDistances = [endpointStubPx];
if (boundedStubPx != null && boundedStubPx >= 8 && boundedStubPx !== endpointStubPx) {
stubDistances.push(boundedStubPx);
}
const candidates = [];
const verticalSides = new Set(['top', 'bottom']);
const horizontalSides = new Set(['left', 'right']);
for (const stubPx of stubDistances) {
const startStub = [
start[0] + fromVector[0] * stubPx,
start[1] + fromVector[1] * stubPx,
];
const endStub = [
end[0] + toVector[0] * stubPx,
end[1] + toVector[1] * stubPx,
];
if (verticalSides.has(fromSide) && verticalSides.has(toSide)
&& Math.abs(start[0] - end[0]) < interiorSegmentPx) {
for (const channelX of [
Math.max(start[0], end[0]) + interiorSegmentPx,
Math.min(start[0], end[0]) - interiorSegmentPx,
]) {
candidates.push([
start,
startStub,
[channelX, startStub[1]],
[channelX, endStub[1]],
endStub,
end,
]);
}
}
if (horizontalSides.has(fromSide) && horizontalSides.has(toSide)
&& Math.abs(start[1] - end[1]) < interiorSegmentPx) {
for (const channelY of [
Math.max(start[1], end[1]) + interiorSegmentPx,
Math.min(start[1], end[1]) - interiorSegmentPx,
]) {
candidates.push([
start,
startStub,
[startStub[0], channelY],
[endStub[0], channelY],
endStub,
end,
]);
}
}
}
return candidates
.map((points) => normalizeRoutePoints(points))
.find((points) => (
routeHonorsEndpointSides(points, fromSide, toSide)
&& collectRouteRhythmIssues({ routedRelations: [{ points }], interiorSegmentPx }).length === 0
&& (typeof accept !== 'function' || accept(points))
)) || null;
}
// Keep conservative auto-routed fan-out/fan-in relationships visually
// distinct without changing authored route controls. The returned map only
// contains endpoints that belong to a shared automatic midpoint anchor.
export function automaticPortSpread(relations, boxes, { gutter = 16, maxSpacing = 14, sideFor, spacingFor } = {}) {
const groups = new Map();
const spread = new Map();
const add = (relation, endpoint, rect, side, counterpart) => {
const key = `${rect.id}\u0000${side}`;
const items = groups.get(key) || [];
items.push({ relation, endpoint, rect, side, counterpart });
groups.set(key, items);
};
for (const relation of asArray(relations)) {
if (!relation || (relation.route && relation.route !== 'auto')) continue;
if (relation.via || relation.channelX !== undefined || relation.channelY !== undefined || relation.labelAt) continue;
const from = boxes.get(relation.from);
const to = boxes.get(relation.to);
if (!from || !to) continue;
const fromSide = chosenSide(
relation.fromSide,
sideFor?.(relation, 'source') || defaultFromSide(from, to),
);
const toSide = chosenSide(
relation.toSide,
sideFor?.(relation, 'target') || defaultToSide(from, to),
);
add(relation, 'from', from, fromSide, to);
add(relation, 'to', to, toSide, from);
}
for (const items of groups.values()) {
if (items.length < 2) continue;
const verticalSide = items[0].side === 'left' || items[0].side === 'right';
items.sort((a, b) => {
const aCoordinate = verticalSide ? a.counterpart.cy : a.counterpart.cx;
const bCoordinate = verticalSide ? b.counterpart.cy : b.counterpart.cx;
if (aCoordinate !== bCoordinate) return aCoordinate - bCoordinate;
const aKey = `${a.relation.id || ''}\u0000${a.relation.from}\u0000${a.relation.to}\u0000${a.relation.label || ''}`;
const bKey = `${b.relation.id || ''}\u0000${b.relation.from}\u0000${b.relation.to}\u0000${b.relation.label || ''}`;
return aKey < bKey ? -1 : aKey > bKey ? 1 : 0;
});
const extent = verticalSide ? items[0].rect.height : items[0].rect.width;
const usable = Math.max(0, extent - gutter * 2);
const spacing = Math.min(maxSpacing, usable / (items.length - 1));
if (!(spacing > 0)) continue;
// Width-aware callers reserve the whole group together. Moving a single
// port around the legacy 14px slots can wrongly report a full side while
// its still-unrouted neighbours could have fitted farther apart.
let offsets;
if (spacingFor) {
const gaps = items.slice(1).map((item, index) => Math.max(maxSpacing,
spacingFor(items[index].relation, item.relation)));
const span = gaps.reduce((sum, gap) => sum + gap, 0);
if (span <= usable && gaps.some((gap) => gap > maxSpacing)) {
let offset = -span / 2;
offsets = [offset, ...gaps.map((gap) => (offset += gap))];
}
}
for (const [index, item] of items.entries()) {
const offset = offsets?.[index] ?? (index - (items.length - 1) / 2) * spacing;
const point = anchor(item.rect, item.side);
if (verticalSide) point[1] += offset;
else point[0] += offset;
const endpoints = spread.get(item.relation) || {};
endpoints[item.endpoint] = point;
spread.set(item.relation, endpoints);
}
}
return spread;
}
// A centre delta on the horizontal axis does not by itself mean the route
// leaves sideways: a hub above an offset spoke has both a horizontal and a
// larger vertical delta, and the router draws the vertical dogleg. Compare the
// deltas so the inferred side matches the axis the route actually uses. Equal
// deltas select horizontal sides; dx === 0 preserves the previous vertical
// result, while a vertical-dominant nonzero dx selects vertical sides.
export function defaultFromSide(from, to) {
const dx = to.cx - from.cx;
const dy = to.cy - from.cy;
if (dx !== 0 && Math.abs(dx) >= Math.abs(dy)) return dx < 0 ? 'left' : 'right';
return dy > 0 ? 'bottom' : 'top';
}
export function defaultToSide(from, to) {
const dx = to.cx - from.cx;
const dy = to.cy - from.cy;
if (dx !== 0 && Math.abs(dx) >= Math.abs(dy)) return dx < 0 ? 'right' : 'left';
return dy > 0 ? 'top' : 'bottom';
}
// Non-architecture renderers retain their established horizontal-first
// endpoint contract. Architecture opts into dominant-axis inference above so
// a vertical hub-and-spoke route can use perpendicular automatic ports.
export function legacyDefaultFromSide(from, to) {
if (to.cx < from.cx) return 'left';
if (to.cx > from.cx) return 'right';
if (to.cy > from.cy) return 'bottom';
return 'top';
}
export function legacyDefaultToSide(from, to) {
if (to.cx < from.cx) return 'right';
if (to.cx > from.cx) return 'left';
if (to.cy > from.cy) return 'top';
return 'bottom';
}
export function chosenSide(side, fallback) {
return side && side !== 'auto' ? side : fallback;
}
export function polylinePath(points) {
return points.map(([x, y], index) => `${index === 0 ? 'M' : 'L'} ${x} ${y}`).join(' ');
}
export function routePointsValue(points) {
return asArray(points)
.filter((point) => Array.isArray(point) && point.length === 2 && isFinitePoint(...point))
.map(([x, y]) => `${x},${y}`)
.join(';');
}
// Only a direct, explicitly authored diagonal needs an artifact-check exception.
// Nonempty via takes precedence; empty via adds no intermediate geometry.
export function authoredStraightRouteAttrs(relation, points) {
if (relation.route !== 'straight' || relation.via?.length || points.length !== 2) return '';
const [start, end] = points;
return Math.abs(start[0] - end[0]) > 0.01 && Math.abs(start[1] - end[1]) > 0.01
? ' data-composition-route="straight"'
: '';
}
export function roundedPath(points, radius) {
if (points.length < 3 || radius <= 0) {
return polylinePath(points);
}
const commands = [`M ${points[0][0]} ${points[0][1]}`];
for (let i = 1; i < points.length - 1; i += 1) {
const [px, py] = points[i - 1];
const [cx, cy] = points[i];
const [nx, ny] = points[i + 1];
const prevLen = Math.hypot(cx - px, cy - py);
const nextLen = Math.hypot(nx - cx, ny - cy);
const r = Math.min(radius, prevLen / 2, nextLen / 2);
if (r < 1) {
commands.push(`L ${cx} ${cy}`);
continue;
}
const before = [cx - ((cx - px) / prevLen) * r, cy - ((cy - py) / prevLen) * r];
const after = [cx + ((nx - cx) / nextLen) * r, cy + ((ny - cy) / nextLen) * r];
commands.push(`L ${before[0]} ${before[1]}`);
commands.push(`Q ${cx} ${cy} ${after[0]} ${after[1]}`);
}
const [endX, endY] = points[points.length - 1];
commands.push(`L ${endX} ${endY}`);
return commands.join(' ');
}
// Shared by edges/flows/transitions: all carry the same optional
// labelAt/labelDx/labelDy/labelSegment knobs.
export function labelPoint(item, points) {
if (item.labelAt) return item.labelAt;
if (points.length === 2) {
return [
(points[0][0] + points[1][0]) / 2 + (item.labelDx || 0),
points[0][1] - 10 + (item.labelDy || 0)
];
}
const segmentIndex = Math.min(points.length - 2, Math.max(0, item.labelSegment ?? 1));
const a = points[segmentIndex];
const b = points[segmentIndex + 1];
return [(a[0] + b[0]) / 2 + (item.labelDx || 0), (a[1] + b[1]) / 2 - 10 + (item.labelDy || 0)];
}
export const componentFill = {
frontend: 'c-frontend',
backend: 'c-backend',
database: 'c-database',
cloud: 'c-cloud',
security: 'c-security',
messagebus: 'c-messagebus',
external: 'c-external'
};
export const componentText = {
frontend: 't-frontend',
backend: 't-backend',
database: 't-database',
cloud: 't-cloud',
security: 't-security',
messagebus: 't-messagebus',
external: 't-external'
};
export const arrowClassMap = {
default: ['a-default', 'arrowhead'],
emphasis: ['a-emphasis', 'arrowhead-emphasis'],
security: ['a-security', 'arrowhead-security'],
dashed: ['a-dashed', 'arrowhead-dashed']
};
// Structural phase/group accents retain their existing semantic colors.
export function variantAccent(variant) {
return variant === 'security' ? 't-security'
: variant === 'emphasis' ? 't-backend'
: variant === 'dashed' ? 't-messagebus' : 't-muted';
}
// Relationship labels use the same theme token as their path. Keep this map
// edge-specific: node-kind text colors only coincide with some path colors in
// the classic preset and must not define the relationship's visual meaning.
export function edgeLabelAccent(variant) {
return variant === 'security'
? 't-edge-security'
: variant === 'emphasis'
? 't-edge-emphasis'
: variant === 'dashed'
? 't-edge-dashed'
: 't-edge-default';
}
export function formatRect(r) {
return `[${Math.round(r.x)}, ${Math.round(r.y)}, ${Math.round(r.width)}, ${Math.round(r.height)}]`;
}
function formatValue(n) {
return String(Math.round(n));
}
// A label anchor is the text origin, so keeping a suggestion on the canvas
// means moving the whole rect: offset is `rect - anchor` on that axis.
function anchorFitsCanvas(anchorValue, offset, size, extent) {
const overflow = axisCanvasOverflow(anchorValue + offset, size, extent);
return overflow.start <= 0 && overflow.end <= 0;
}
// Suggestions are emitted as integers, so the real-valued bounds are tightened
// inward with ceil/floor first: every integer between them keeps the whole rect
// on the canvas, which a bound like 616.7 would not. Returns null when the rect
// is wider than the canvas and no anchor can contain it.
function clampAnchorToCanvas(anchorValue, offset, size, extent) {
const rounded = Math.round(anchorValue);
if (!Number.isFinite(extent)) return rounded;
const min = Math.ceil(-offset);
const max = Math.floor(extent - size - offset);
return max < min ? null : Math.min(Math.max(rounded, min), max);
}
/**
* Actionable hint when an edge label rect hits a node/component box (#7).
* Every suggested value is a replacement for the authored field, not an
* increment, and has to survive being applied to the document:
* - the absolute form is nudged along x so the rect stays on the canvas, and a
* vertical placement that cannot fit is dropped rather than clamped, since
* clamping it back would push the label onto the obstacle it must clear;
* - the relative form is offered only when labelDx/labelDy actually move this
* label (labelPoint returns an authored labelAt as-is) and only when the
* replacements, computed from the document's own labelDx/labelDy, land the
* rect inside the canvas.
* The authored values therefore come from `labelRect.relation`, the authored
* relationship the renderer already attaches to every label record.
* `obstacles` is every box the callers' own overlap loop tests (defaults to
* the named obstacle alone): a placement that merely traded the named obstacle
* for its neighbor would fail the same rule again when applied.
*/
export function suggestLabelObstacleFix(labelRect, lx, ly, obstacle, obstacleKind = 'component', viewBox, obstacles) {
// Renderer canvases are origin-zero [width, height] by schema, but read a
// 4-number [min-x, min-y, width, height] the same way the containment
// collector does — degraded no-ajv runs must not clamp against the origin
// pair as if it were the canvas size.
const box = asArray(viewBox);
const [canvasWidth, canvasHeight] = box.length === 4 ? box.slice(2) : box;
const xOffset = labelRect.x - lx;
const yOffset = labelRect.y - ly;
const anchorX = clampAnchorToCanvas(lx, xOffset, labelRect.width, canvasWidth);
// The placement anchors are derived from the label's own rect, not from the
// obstacle alone: an obstacle-only "above" anchor assumes the 14px
// single-line rect and lands a 27px two-line rect (dataflow classification,
// lifecycle note) back on the obstacle it must clear. The overlap filter
// uses the callers' own detection call, so a surviving hint cannot re-raise
// the problem it repairs.
const blockers = obstacles ? [...obstacles] : [obstacle];
const placements = [
{ name: 'below', y: Math.round(obstacle.y + obstacle.height + 4 - yOffset) },
{ name: 'above', y: Math.round(obstacle.y - 4 - labelRect.height - yOffset) },
].filter(({ y }) => anchorX !== null
&& anchorFitsCanvas(y, yOffset, labelRect.height, canvasHeight)
&& blockers.every((blocker) => !rectsOverlap(
{ x: anchorX + xOffset, y: y + yOffset, width: labelRect.width, height: labelRect.height },
blocker,
-2,
)));
const lines = [
` label rect: ${formatRect(labelRect)}`,
` ${obstacleKind} "${obstacle.id}" rect: ${formatRect(obstacle)}`,
];
if (!placements.length) {
// Only the vertical slots beside the named obstacle were tried, so an
// unclaimed spot elsewhere may still exist — never assert that none does.
lines.push(anchorX === null
? ` Suggested fix: the ${Math.round(labelRect.width)}px label rect cannot fit the ${canvasWidth}x${canvasHeight} viewBox at any anchor — shorten the label or enlarge meta.viewBox`
: ` Suggested fix: no placement directly above or below "${obstacle.id}" stays clear inside the ${canvasWidth}x${canvasHeight} viewBox — move the label to an open area with labelAt, shorten the label, move the ${obstacleKind}, or enlarge meta.viewBox`);
return lines.join('\n');
}
const authored = labelRect.relation || {};
const authoredDx = Number.isFinite(authored.labelDx) ? authored.labelDx : 0;
const authoredDy = Number.isFinite(authored.labelDy) ? authored.labelDy : 0;
const relativeHint = (y) => {
if (Array.isArray(authored.labelAt)) return null;
// Both replacements are measured from the automatic label point that the
// authored offsets are applied to, and against the unrounded anchor: a
// rounded base would shift the applied label by up to a pixel.
const dx = Math.round(authoredDx + anchorX - lx);
const dy = Math.round(authoredDy + y - ly);
// labelDx is authored as a number, so an authored fraction must not read as
// a needed nudge once the replacement is rounded to an integer.
const movesX = Math.abs(dx - authoredDx) >= 0.5;
const landsAtX = lx - authoredDx + (movesX ? dx : authoredDx);
const landsAtY = ly - authoredDy + dy;
if (!anchorFitsCanvas(landsAtX, xOffset, labelRect.width, canvasWidth)) return null;
if (!anchorFitsCanvas(landsAtY, yOffset, labelRect.height, canvasHeight)) return null;
return movesX
? `set labelDx ${formatValue(dx)} with labelDy ${formatValue(dy)}`
: `set labelDy ${formatValue(dy)}`;
};
const hint = placements
.map(({ name, y }) => {
const relative = relativeHint(y);
return `set labelAt [${anchorX}, ${y}]${relative ? ` or ${relative}` : ''} (${name})`;
})
.join('; or ');
lines.push(` Suggested fix: ${hint}`);
return lines.join('\n');
}
/** Hint when two edge labels collide. */
export function suggestLabelPairFix(a, b) {
return [
` "${a.label}" ${formatRect(a)}; "${b.label}" ${formatRect(b)}`,
' Suggested fix: adjust labelDx/labelDy/labelSegment, or route one relationship through a separate corridor',
].join('\n');
}
/** Hint when two components/nodes are too close. */
export function suggestComponentSeparation(a, b, minGap = 8) {
const rightX = Math.round(a.x + a.width + minGap);
const belowY = Math.round(a.y + a.height + minGap);
return [
` "${a.id}" ${formatRect(a)}; "${b.id}" ${formatRect(b)}`,
` Suggested fix: move "${b.id}" pos to [${rightX}, ${Math.round(b.y)}] (right of "${a.id}") or [${Math.round(b.x)}, ${belowY}] (below)`,
].join('\n');
}