59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
import array from "./array.js";
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import constant from "./constant.js";
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import offsetNone from "./offset/none.js";
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import orderNone from "./order/none.js";
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function stackValue(d, key) {
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return d[key];
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}
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function stackSeries(key) {
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const series = [];
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series.key = key;
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return series;
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}
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export default function() {
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var keys = constant([]),
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order = orderNone,
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offset = offsetNone,
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value = stackValue;
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function stack(data) {
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var sz = Array.from(keys.apply(this, arguments), stackSeries),
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i, n = sz.length, j = -1,
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oz;
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for (const d of data) {
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for (i = 0, ++j; i < n; ++i) {
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(sz[i][j] = [0, +value(d, sz[i].key, j, data)]).data = d;
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}
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}
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for (i = 0, oz = array(order(sz)); i < n; ++i) {
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sz[oz[i]].index = i;
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}
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offset(sz, oz);
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return sz;
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}
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stack.keys = function(_) {
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return arguments.length ? (keys = typeof _ === "function" ? _ : constant(Array.from(_)), stack) : keys;
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};
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stack.value = function(_) {
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return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), stack) : value;
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};
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stack.order = function(_) {
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return arguments.length ? (order = _ == null ? orderNone : typeof _ === "function" ? _ : constant(Array.from(_)), stack) : order;
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};
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stack.offset = function(_) {
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return arguments.length ? (offset = _ == null ? offsetNone : _, stack) : offset;
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};
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return stack;
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}
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