68 lines
1.4 KiB
Svelte
68 lines
1.4 KiB
Svelte
<!--
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Copyright: Ankitects Pty Ltd and contributors
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License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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-->
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<script lang="ts">
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import { onMount, getContext } from "svelte";
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import { nightModeKey } from "components/context-keys";
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import { convertMathjax } from "./mathjax";
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export let mathjax: string;
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export let block: boolean;
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export let autofocus = false;
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/* have fixed fontSize for normal */
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export const fontSize: number = 20;
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const nightMode = getContext<boolean>(nightModeKey);
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$: [converted, title] = convertMathjax(mathjax, nightMode, fontSize);
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$: empty = title === "MathJax";
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let encoded: string;
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let imageHeight: number;
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$: {
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encoded = encodeURIComponent(converted);
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setTimeout(() => {
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imageHeight = image.getBoundingClientRect().height;
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});
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}
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let image: HTMLImageElement;
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onMount(() => {
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if (autofocus) {
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image.click();
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}
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});
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</script>
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<img
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bind:this={image}
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src="data:image/svg+xml,{encoded}"
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class:block
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class:empty
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style="--vertical-center: {-imageHeight / 2 + fontSize / 4}px;"
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alt="Mathjax"
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{title}
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data-anki="mathjax"
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on:dragstart|preventDefault
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/>
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<style lang="scss">
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img {
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vertical-align: var(--vertical-center);
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}
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.block {
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display: block;
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margin: auto;
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}
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.empty {
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vertical-align: sub;
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}
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</style>
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