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import { LANE_MIN_HEIGHT } from '../di-constants';
export interface LaneLayoutResult {
lanes: Array<{ element: any; bounds: Bounds }>;
totalHeight: number;
}
export interface LaneLayoutOptions {
startX: number;
startY: number;
totalWidth: number;
edges?: Array<{ element: any; waypoints: Point[]; isFeedback?: boolean }>;
}
export function layoutProcessLanes(
process: any,
shapes: Array<{ element: any; bounds: Bounds }>,
options: LaneLayoutOptions
): LaneLayoutResult {
const laneSets = process.laneSets || [];
if (laneSets.length === 0 || !laneSets[0].lanes || laneSets[0].lanes.length === 0) {
return { lanes: [], totalHeight: 0 };
}
const rawLanes = laneSets[0].lanes;
const laneResults: Array<{ element: any; bounds: Bounds }> = [];
const nodeToLane = new Map<string, string>();
for (const lane of rawLanes) {
const refs = lane.flowNodeRef || [];
for (const ref of refs) {
const refId = ref.id || ref;
nodeToLane.set(refId, lane.id);
}
}
let currentY = options.startY;
for (const lane of rawLanes) {
const laneElements = shapes.filter((s) => nodeToLane.get(s.element.id) === lane.id);
const laneNodeIds = new Set(laneElements.map((s) => s.element.id));
const laneFeedbackEdges =
options.edges?.filter((e) => {
const srcId = e.element.sourceRef?.id || e.element.sourceRef;
return Boolean(e.isFeedback) && laneNodeIds.has(srcId);
}) || [];
const laneHeight = computeSingleLaneHeight(laneElements, laneFeedbackEdges, currentY);
laneResults.push({
element: lane,
bounds: {
x: options.startX,
y: currentY,
width: options.totalWidth,
height: laneHeight,
},
});
currentY += laneHeight;
}
return {
lanes: laneResults,
totalHeight: currentY - options.startY,
};
}
function computeSingleLaneHeight(
laneElements: Array<{ bounds: Bounds }>,
laneFeedbackEdges: Array<{ waypoints: Point[] }>,
currentY: number
): number {
if (laneElements.length === 0) {
return LANE_MIN_HEIGHT;
}
let minY = Infinity;
let maxY = -Infinity;
for (const el of laneElements) {
minY = Math.min(minY, el.bounds.y);
maxY = Math.max(maxY, el.bounds.y + el.bounds.height);
}
let maxEdgeY = -Infinity;
for (const edge of laneFeedbackEdges) {
for (const wp of edge.waypoints) {
maxEdgeY = Math.max(maxEdgeY, wp.y);
}
}
if (maxEdgeY > -Infinity) {
return Math.max(LANE_MIN_HEIGHT, maxEdgeY - currentY + 30);
}
return Math.max(LANE_MIN_HEIGHT, maxY - minY + 40);
}
export interface MessageFlowRouteOptions {
obstacles?: Bounds[];
interPoolChannelY?: number;
targetPortX?: number;
}
export function isMessageCorridorBlocked(
x: number,
yRange: [number, number],
ctx: { ignore: Bounds[]; obstacles?: Bounds[] }
): boolean {
if (!ctx.obstacles) {
return false;
}
const [y1, y2] = yRange;
const minY = Math.min(y1, y2);
const maxY = Math.max(y1, y2);
return ctx.obstacles.some(
(b) =>
!ctx.ignore.includes(b) && x > b.x && x < b.x + b.width && b.y + b.height > minY && b.y < maxY
);
}
export function routeMessageFlow(
sourceBounds: Bounds,
targetBounds: Bounds,
options?: MessageFlowRouteOptions | Bounds[]
): Point[] {
const opts: MessageFlowRouteOptions = Array.isArray(options)
? { obstacles: options }
: (options ?? {});
const ignore = [sourceBounds, targetBounds];
// Source is above target
if (sourceBounds.y + sourceBounds.height <= targetBounds.y) {
const srcBottom: Point = {
x: Math.round(sourceBounds.x + sourceBounds.width / 2),
y: sourceBounds.y + sourceBounds.height,
};
const tgtX = opts.targetPortX ?? Math.round(targetBounds.x + targetBounds.width / 2);
const tgtTop: Point = {
x: tgtX,
y: targetBounds.y,
};
if (srcBottom.x === tgtTop.x) {
return [srcBottom, tgtTop];
}
const midY = opts.interPoolChannelY ?? Math.round((srcBottom.y + tgtTop.y) / 2);
const blocked = isMessageCorridorBlocked(srcBottom.x, [srcBottom.y, midY], {
ignore,
obstacles: opts.obstacles,
});
if (blocked) {
const srcRight: Point = {
x: sourceBounds.x + sourceBounds.width,
y: Math.round(sourceBounds.y + sourceBounds.height / 2),
};
const stepX = sourceBounds.x + sourceBounds.width + 20;
return [
srcRight,
{ x: stepX, y: srcRight.y },
{ x: stepX, y: midY },
{ x: tgtTop.x, y: midY },
tgtTop,
];
}
return [srcBottom, { x: srcBottom.x, y: midY }, { x: tgtTop.x, y: midY }, tgtTop];
}
// Source is below target
const srcTop: Point = {
x: Math.round(sourceBounds.x + sourceBounds.width / 2),
y: sourceBounds.y,
};
const tgtX = opts.targetPortX ?? Math.round(targetBounds.x + targetBounds.width / 2);
const tgtBottom: Point = {
x: tgtX,
y: targetBounds.y + targetBounds.height,
};
if (srcTop.x === tgtBottom.x) {
return [srcTop, tgtBottom];
}
const midY = opts.interPoolChannelY ?? Math.round((srcTop.y + tgtBottom.y) / 2);
const blocked = isMessageCorridorBlocked(srcTop.x, [srcTop.y, midY], {
ignore,
obstacles: opts.obstacles,
});
if (blocked) {
const srcRight: Point = {
x: sourceBounds.x + sourceBounds.width,
y: Math.round(sourceBounds.y + sourceBounds.height / 2),
};
const stepX = sourceBounds.x + sourceBounds.width + 20;
return [
srcRight,
{ x: stepX, y: srcRight.y },
{ x: stepX, y: midY },
{ x: tgtBottom.x, y: midY },
tgtBottom,
];
}
return [srcTop, { x: srcTop.x, y: midY }, { x: tgtBottom.x, y: midY }, tgtBottom];
}
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