/
drawPath.ts
98 lines (84 loc) · 2.52 KB
/
drawPath.ts
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import type { Types } from '@cornerstonejs/core';
import _getHash from './_getHash';
import setNewAttributesIfValid from './setNewAttributesIfValid';
import setAttributesIfNecessary from './setAttributesIfNecessary';
import { SVGDrawingHelper } from '../types';
/**
* Draws an SVG path with the given points.
*
* The `closePath` option, if true, draws a closed path (last point
* connected to the first).
*/
export default function drawPath(
svgDrawingHelper: SVGDrawingHelper,
annotationUID: string,
pathUID: string,
points: Types.Point2[] | Types.Point2[][],
options: {
color?: string;
fillColor?: string;
fillOpacity?: number;
width?: number;
lineWidth?: number;
lineDash?: string;
closePath?: boolean;
}
): void {
// It may be a polyline with holes that will be an array with multiple
// 'points' arrays
const hasSubArrays =
points.length && points[0].length && Array.isArray(points[0][0]);
const pointsArrays = hasSubArrays ? points : [points];
const {
color = 'rgb(0, 255, 0)',
width = 10,
fillColor = 'none',
fillOpacity = 0,
lineWidth,
lineDash,
closePath = false,
} = options;
// for supporting both lineWidth and width options
const strokeWidth = lineWidth || width;
const svgns = 'http://www.w3.org/2000/svg';
const svgNodeHash = _getHash(annotationUID, 'path', pathUID);
const existingNode = svgDrawingHelper.getSvgNode(svgNodeHash);
let pointsAttribute = '';
for (let i = 0, numArrays = pointsArrays.length; i < numArrays; i++) {
const points = pointsArrays[i];
const numPoints = points.length;
if (numPoints < 2) {
continue;
}
for (let j = 0; j < numPoints; j++) {
const point = points[j];
const cmd = j ? 'L' : 'M';
pointsAttribute += `${cmd} ${point[0].toFixed(1)}, ${point[1].toFixed(
1
)} `;
}
if (closePath) {
pointsAttribute += 'Z ';
}
}
if (!pointsAttribute) {
return;
}
const attributes = {
d: pointsAttribute,
stroke: color,
fill: fillColor,
'fill-opacity': fillOpacity,
'stroke-width': strokeWidth,
'stroke-dasharray': lineDash,
};
if (existingNode) {
// This is run to avoid re-rendering annotations that actually haven't changed
setAttributesIfNecessary(attributes, existingNode);
svgDrawingHelper.setNodeTouched(svgNodeHash);
} else {
const newNode = document.createElementNS(svgns, 'path');
setNewAttributesIfValid(attributes, newNode);
svgDrawingHelper.appendNode(newNode, svgNodeHash);
}
}