import { Injectable } from '@angular/core';
import { FlowchartConstants } from './ngx-flowchart.models';
import * as i0 from "@angular/core";
export class FcEdgeDrawingService {
    constructor() {
    }
    getEdgeDAttribute(pt1, pt2, style) {
        let dAddribute = `M ${pt1.x}, ${pt1.y} `;
        if (style === FlowchartConstants.curvedStyle) {
            const sourceTangent = this.computeEdgeSourceTangent(pt1, pt2);
            const destinationTangent = this.computeEdgeDestinationTangent(pt1, pt2);
            dAddribute += `C ${sourceTangent.x}, ${sourceTangent.y} ${(destinationTangent.x - 50)}, ${destinationTangent.y} ${pt2.x}, ${pt2.y}`;
        }
        else {
            dAddribute += `L ${pt2.x}, ${pt2.y}`;
        }
        return dAddribute;
    }
    getEdgeCenter(pt1, pt2) {
        return {
            x: (pt1.x + pt2.x) / 2,
            y: (pt1.y + pt2.y) / 2
        };
    }
    computeEdgeTangentOffset(pt1, pt2) {
        return (pt2.y - pt1.y) / 2;
    }
    computeEdgeSourceTangent(pt1, pt2) {
        return {
            x: pt1.x,
            y: pt1.y + this.computeEdgeTangentOffset(pt1, pt2)
        };
    }
    computeEdgeDestinationTangent(pt1, pt2) {
        return {
            x: pt2.x,
            y: pt2.y - this.computeEdgeTangentOffset(pt1, pt2)
        };
    }
}
FcEdgeDrawingService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "12.2.14", ngImport: i0, type: FcEdgeDrawingService, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
FcEdgeDrawingService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "12.2.14", ngImport: i0, type: FcEdgeDrawingService });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "12.2.14", ngImport: i0, type: FcEdgeDrawingService, decorators: [{
            type: Injectable
        }], ctorParameters: function () { return []; } });
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