import array from "./src-array.js";
import constant from "./src-constant.js";
import curveLinear from "./src-curve-linear.js";
import { withPath } from "./src-path.js";
import { x, y } from "./src-point.js";
function line(x$1, y$1) {
  var defined = constant(true), context = null, curve = curveLinear, output = null, path = withPath(line2);
  x$1 = typeof x$1 === "function" ? x$1 : x$1 === void 0 ? x : constant(x$1);
  y$1 = typeof y$1 === "function" ? y$1 : y$1 === void 0 ? y : constant(y$1);
  function line2(data) {
    var i, n = (data = array(data)).length, d, defined0 = false, buffer;
    if (context == null) output = curve(buffer = path());
    for (i = 0; i <= n; ++i) {
      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
        if (defined0 = !defined0) output.lineStart();
        else output.lineEnd();
      }
      if (defined0) output.point(+x$1(d, i, data), +y$1(d, i, data));
    }
    if (buffer) return output = null, buffer + "" || null;
  }
  line2.x = function(_) {
    return arguments.length ? (x$1 = typeof _ === "function" ? _ : constant(+_), line2) : x$1;
  };
  line2.y = function(_) {
    return arguments.length ? (y$1 = typeof _ === "function" ? _ : constant(+_), line2) : y$1;
  };
  line2.defined = function(_) {
    return arguments.length ? (defined = typeof _ === "function" ? _ : constant(!!_), line2) : defined;
  };
  line2.curve = function(_) {
    return arguments.length ? (curve = _, context != null && (output = curve(context)), line2) : curve;
  };
  line2.context = function(_) {
    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line2) : context;
  };
  return line2;
}
export {
  line as default
};
//# sourceMappingURL=src-line.js.map
