74 lines
1.8 KiB
JavaScript
74 lines
1.8 KiB
JavaScript
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import {slice} from "./array.js";
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import constant from "./constant.js";
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import {bumpX, bumpY, bumpRadial} from "./curve/bump.js";
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import {withPath} from "./path.js";
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import {x as pointX, y as pointY} from "./point.js";
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function linkSource(d) {
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return d.source;
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}
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function linkTarget(d) {
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return d.target;
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}
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export function link(curve) {
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let source = linkSource,
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target = linkTarget,
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x = pointX,
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y = pointY,
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context = null,
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output = null,
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path = withPath(link);
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function link() {
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let buffer;
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const argv = slice.call(arguments);
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const s = source.apply(this, argv);
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const t = target.apply(this, argv);
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if (context == null) output = curve(buffer = path());
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output.lineStart();
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argv[0] = s, output.point(+x.apply(this, argv), +y.apply(this, argv));
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argv[0] = t, output.point(+x.apply(this, argv), +y.apply(this, argv));
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output.lineEnd();
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if (buffer) return output = null, buffer + "" || null;
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}
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link.source = function(_) {
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return arguments.length ? (source = _, link) : source;
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};
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link.target = function(_) {
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return arguments.length ? (target = _, link) : target;
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};
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link.x = function(_) {
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return arguments.length ? (x = typeof _ === "function" ? _ : constant(+_), link) : x;
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};
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link.y = function(_) {
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return arguments.length ? (y = typeof _ === "function" ? _ : constant(+_), link) : y;
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};
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link.context = function(_) {
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return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), link) : context;
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};
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return link;
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}
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export function linkHorizontal() {
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return link(bumpX);
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}
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export function linkVertical() {
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return link(bumpY);
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}
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export function linkRadial() {
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const l = link(bumpRadial);
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l.angle = l.x, delete l.x;
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l.radius = l.y, delete l.y;
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return l;
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}
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