| 1 | "use strict";
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| 2 |
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| 3 | Object.defineProperty(exports, "__esModule", {
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| 4 | value: true
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| 5 | });
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| 6 | exports.default = _default;
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| 7 | exports.stepAfter = stepAfter;
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| 8 | exports.stepBefore = stepBefore;
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| 9 | function Step(context, t) {
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| 10 | this._context = context;
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| 11 | this._t = t;
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| 12 | }
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| 13 | Step.prototype = {
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| 14 | areaStart: function () {
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| 15 | this._line = 0;
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| 16 | },
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| 17 | areaEnd: function () {
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| 18 | this._line = NaN;
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| 19 | },
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| 20 | lineStart: function () {
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| 21 | this._x = this._y = NaN;
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| 22 | this._point = 0;
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| 23 | },
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| 24 | lineEnd: function () {
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| 25 | if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
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| 26 | if (this._line || this._line !== 0 && this._point === 1) this._context.closePath();
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| 27 | if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
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| 28 | },
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| 29 | point: function (x, y) {
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| 30 | x = +x, y = +y;
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| 31 | switch (this._point) {
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| 32 | case 0:
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| 33 | this._point = 1;
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| 34 | this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);
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| 35 | break;
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| 36 | case 1:
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| 37 | this._point = 2;
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| 38 | // falls through
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| 39 | default:
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| 40 | {
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| 41 | if (this._t <= 0) {
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| 42 | this._context.lineTo(this._x, y);
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| 43 | this._context.lineTo(x, y);
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| 44 | } else {
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| 45 | var x1 = this._x * (1 - this._t) + x * this._t;
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| 46 | this._context.lineTo(x1, this._y);
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| 47 | this._context.lineTo(x1, y);
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| 48 | }
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| 49 | break;
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| 50 | }
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| 51 | }
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| 52 | this._x = x, this._y = y;
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| 53 | }
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| 54 | };
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| 55 | function _default(context) {
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| 56 | return new Step(context, 0.5);
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| 57 | }
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| 58 | function stepBefore(context) {
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| 59 | return new Step(context, 0);
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| 60 | }
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| 61 | function stepAfter(context) {
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| 62 | return new Step(context, 1);
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| 63 | } |
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