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import {axisTop, axisBottom, axisRight, axisLeft, create, format, utcFormat} from "d3";

import {formatIsoDate} from "./format.js";

import {boolean, number, string, keyword, maybeKeyword, constant, isTemporal} from "./mark.js";

export class AxisX {

constructor({

name = "x",

axis,

ticks,

tickSize = name === "fx" ? 0 : 6,

tickPadding = tickSize === 0 ? 9 : 3,

tickFormat,

grid,

label,

labelAnchor,

labelOffset,

tickRotate

} = {}) {

this.name = name;

this.axis = keyword(axis, "axis", ["top", "bottom"]);

this.ticks = ticks;

this.tickSize = number(tickSize);

this.tickPadding = number(tickPadding);

this.tickFormat = tickFormat;

this.grid = boolean(grid);

this.label = string(label);

this.labelAnchor = maybeKeyword(labelAnchor, "labelAnchor", ["center", "left", "right"]);

this.labelOffset = number(labelOffset);

this.tickRotate = number(tickRotate);

}

render(

index,

{[this.name]: x, fy},

channels,

{

width,

height,

marginTop,

marginRight,

marginBottom,

marginLeft,

facetMarginTop,

facetMarginBottom,

labelMarginLeft = 0,

labelMarginRight = 0

}

) {

const {

axis,

grid,

label,

labelAnchor,

labelOffset,

tickRotate

} = this;

const offset = this.name === "x" ? 0 : axis === "top" ? marginTop - facetMarginTop : marginBottom - facetMarginBottom;

const offsetSign = axis === "top" ? -1 : 1;

const ty = offsetSign * offset + (axis === "top" ? marginTop : height - marginBottom);

return create("svg:g")

.attr("transform", `translate(0,${ty})`)

.call(createAxis(axis === "top" ? axisTop : axisBottom, x, this))

.call(maybeTickRotate, tickRotate)

.attr("font-size", null)

.attr("font-family", null)

.call(g => g.select(".domain").remove())

.call(!grid ? () => {}

: fy ? gridFacetX(fy, -ty)

: gridX(offsetSign * (marginBottom + marginTop - height)))

.call(!label ? () => {} : g => g.append("text")

.attr("fill", "currentColor")

.attr("transform", `translate(${

labelAnchor === "center" ? (width + marginLeft - marginRight) / 2

: labelAnchor === "right" ? width + labelMarginRight

: -labelMarginLeft

},${labelOffset * offsetSign})`)

.attr("dy", axis === "top" ? "1em" : "-0.32em")

.attr("text-anchor", labelAnchor === "center" ? "middle"

: labelAnchor === "right" ? "end"

: "start")

.text(label))

.node();

}

export class AxisY {

constructor({

name = "y",

axis,

ticks,

tickSize = name === "fy" ? 0 : 6,

tickPadding = tickSize === 0 ? 9 : 3,

tickFormat,

grid,

label,

labelAnchor,

labelOffset,

tickRotate

} = {}) {

this.name = name;

this.axis = keyword(axis, "axis", ["left", "right"]);

this.ticks = ticks;

this.tickSize = number(tickSize);

this.tickPadding = number(tickPadding);

this.tickFormat = tickFormat;

this.grid = boolean(grid);

this.label = string(label);

this.labelAnchor = maybeKeyword(labelAnchor, "labelAnchor", ["center", "top", "bottom"]);

this.labelOffset = number(labelOffset);

this.tickRotate = number(tickRotate);

}

render(

index,

{[this.name]: y, fx},

channels,

{

width,

height,

marginTop,

marginRight,

marginBottom,

marginLeft,

facetMarginLeft,

facetMarginRight

}

) {

const {

axis,

grid,

label,

labelAnchor,

labelOffset,

tickRotate

} = this;

const offset = this.name === "y" ? 0 : axis === "left" ? marginLeft - facetMarginLeft : marginRight - facetMarginRight;

const offsetSign = axis === "left" ? -1 : 1;

const tx = offsetSign * offset + (axis === "right" ? width - marginRight : marginLeft);

return create("svg:g")

.attr("transform", `translate(${tx},0)`)

.call(createAxis(axis === "right" ? axisRight : axisLeft, y, this))

.call(maybeTickRotate, tickRotate)

.attr("font-size", null)

.attr("font-family", null)

.call(g => g.select(".domain").remove())

.call(!grid ? () => {}

: fx ? gridFacetY(fx, -tx)

: gridY(offsetSign * (marginLeft + marginRight - width)))

.call(!label ? () => {} : g => g.append("text")

.attr("fill", "currentColor")

.attr("transform", `translate(${labelOffset * offsetSign},${

labelAnchor === "center" ? (height + marginTop - marginBottom) / 2

: labelAnchor === "bottom" ? height - marginBottom

: marginTop

})${labelAnchor === "center" ? ` rotate(-90)` : ""}`)

.attr("dy", labelAnchor === "center" ? (axis === "right" ? "-0.32em" : "0.75em")

: labelAnchor === "bottom" ? "1.4em"

: "-1em")

.attr("text-anchor", labelAnchor === "center" ? "middle"

: axis === "right" ? "end"

: "start")

.text(label))

.node();

}

function gridX(y2) {

return g => g.selectAll(".tick line")

.clone(true)

.attr("stroke-opacity", 0.1)

.attr("y2", y2);

}

function gridY(x2) {

return g => g.selectAll(".tick line")

.clone(true)

.attr("stroke-opacity", 0.1)

.attr("x2", x2);

}

function gridFacetX(fy, ty) {

const dy = fy.bandwidth();

return g => g.selectAll(".tick")

.append("path")

.attr("stroke", "currentColor")

.attr("stroke-opacity", 0.1)

.attr("d", fy.domain().map(v => `M0,${fy(v) + ty}v${dy}`).join(""));

}

function gridFacetY(fx, tx) {

const dx = fx.bandwidth();

return g => g.selectAll(".tick")

.append("path")

.attr("stroke", "currentColor")

.attr("stroke-opacity", 0.1)

.attr("d", fx.domain().map(v => `M${fx(v) + tx},0h${dx}`).join(""));

}

function createAxis(axis, scale, {ticks, tickSize, tickPadding, tickFormat}) {

if (!scale.tickFormat && typeof tickFormat !== "function") {

// D3 doesn’t provide a tick format for ordinal scales; we want shorthand

// when an ordinal domain is numbers or dates, and we want null to mean the

// empty string, not the default identity format.

tickFormat = tickFormat === undefined ? (isTemporal(scale.domain()) ? formatIsoDate : string)

: (typeof tickFormat === "string" ? (isTemporal(scale.domain()) ? utcFormat : format)

: constant)(tickFormat);

}

return axis(scale)

.ticks(Array.isArray(ticks) ? null : ticks, typeof tickFormat === "function" ? null : tickFormat)

.tickFormat(typeof tickFormat === "function" ? tickFormat : null)

.tickSizeInner(tickSize)

.tickSizeOuter(0)

.tickPadding(tickPadding)

.tickValues(Array.isArray(ticks) ? ticks : null);

}

function maybeTickRotate(g, rotate) {

if (!(rotate = +rotate)) return;

const radians = Math.PI / 180;

const labels = g.selectAll("text").attr("dy", "0.32em");

const y = +labels.attr("y");

if (y) {

const s = Math.sign(y);

labels

.attr("y", null)

.attr("transform", `translate(0, ${y + s * 4 * Math.cos(rotate * radians)}) rotate(${rotate})`)

.attr("text-anchor", Math.abs(rotate) < 10 ? "middle" : (rotate < 0) ^ (s > 0) ? "start" : "end");

} else {

const x = +labels.attr("x");

const s = Math.sign(x);

labels

.attr("x", null)

.attr("transform", `translate(${x + s * 4 * Math.abs(Math.sin(rotate * radians))}, 0) rotate(${rotate})`)

.attr("text-anchor", Math.abs(rotate) > 60 ? "middle" : s > 0 ? "start" : "end");

}

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