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svg-labels.ts
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svg-labels.ts
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import { LabelProps, Pair, ChartOptions } from "./types.ts"
export const createXLabel = (
[minT, maxT]: Pair,
{ W, H, T, R, B, L, X_TICKS, Y_TICKS, FONT_SIZE }: ChartOptions
) => ({ index, label }: LabelProps) => `
<text x="${L + (W / X_TICKS) * index}" y="${FONT_SIZE * 1.5 - B}">
${
label ??
new Date(
(1 / X_TICKS) * index * (maxT - minT) + minT
).toLocaleDateString()
}
</text>
`
export const createYLabel = (
[minY, maxY]: Pair,
{ W, H, T, R, B, L, X_TICKS, Y_TICKS, FONT_SIZE }: ChartOptions
) => ({ index, label }: LabelProps) => `
<text x="${L - FONT_SIZE / 2}" y="${-(B + (H / Y_TICKS) * index)}">
${label ?? minY + ((maxY - minY) / Y_TICKS) * index}
</text>
`
export const createTicks = (TICKS: number) =>
Array.from(Array(TICKS), (_, index) => ({ index }))