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Title and subtitle support #423

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26 changes: 21 additions & 5 deletions src/plot.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ import {Scales, autoScaleRange} from "./scales.js";
import {offset} from "./style.js";

export function plot(options = {}) {
const {facet, style, caption} = options;
const {facet, style, caption, title, subtitle} = options;

// When faceting, wrap all marks in a faceting mark.
if (facet !== undefined) {
Expand Down Expand Up @@ -88,12 +88,28 @@ export function plot(options = {}) {
if (node != null) svg.appendChild(node);
}

// Wrap the plot in a figure with a caption, if desired.
if (caption == null) return svg;
// Wrap the plot in a figure with a caption, a title or a subtitle, if desired.
if (caption == null && title == null && subtitle == null) return svg;

const figure = document.createElement("figure");

if (title) {
const figtitle = figure.appendChild(document.createElement("h1"));
figtitle.appendChild(title instanceof Node ? title : document.createTextNode(title));
}

if (subtitle) {
const figsubtitle = figure.appendChild(document.createElement("h2"));
figsubtitle.appendChild(subtitle instanceof Node ? subtitle : document.createTextNode(subtitle));
}

figure.appendChild(svg);
const figcaption = figure.appendChild(document.createElement("figcaption"));
figcaption.appendChild(caption instanceof Node ? caption : document.createTextNode(caption));

if (caption) {
const figcaption = figure.appendChild(document.createElement("figcaption"));
figcaption.appendChild(caption instanceof Node ? caption : document.createTextNode(caption));
}

return figure;
}

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169 changes: 169 additions & 0 deletions test/output/subtitle.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,169 @@
<figure>
<h2>Relative frequency of letters in the English language</h2><svg class="plot" fill="currentColor" text-anchor="middle" width="640" height="400" viewBox="0 0 640 400" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</g>
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<line stroke="currentColor" x2="-6"></line>
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</g>
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<line stroke="currentColor" x2="-6"></line>
<line stroke="currentColor" x2="580" stroke-opacity="0.1"></line><text fill="currentColor" x="-9" dy="0.32em">12</text>
</g><text fill="currentColor" transform="translate(-40,20)" dy="-1em" text-anchor="start">↑ Frequency (%)</text>
</g>
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