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