anki/ts/editable/Mathjax.svelte
RumovZ f2173fddb0
Live theme changes (#1497)
* Allow theme change at runtime and add hook

* Save or restore default palette on theme change

* Update aqt widget styles on theme change

* styling fixes

- drop _light_palette, as default_palette serves the same purpose
- save default platform theme, and restore it when switching away
from nightmode
- update macOS light/dark mode on theme switch
- fix unreadable menus on Windows

* update night-mode classes on theme change

This is the easy part - CSS styling that uses standard_css or our
css variables should update automatically. The main remaining issue
is JS code that sets colors based on the theme at the time it's run -
eg the graph code, and the editor.

* switch night mode value on toggle

* expose current theme via a store; switch graphs to use it

https://github.com/ankitects/anki/issues/1471#issuecomment-972402492

* start using currentTheme in editor/components

This fixes basic editing - there are still components that need updating.

* add simple xcodeproj for code completion

* add helper to get currently-active system theme on macOS

* fix setCurrentTheme not being immediately available

* live update tag color

* style().name() doesn't work on Qt5

* automatic theme switching on Windows/Mac

* currentTheme -> pageTheme

* Replace `nightModeKey` with `pageTheme`

Co-authored-by: Damien Elmes <gpg@ankiweb.net>
2021-11-25 07:17:41 +10:00

103 lines
2.5 KiB
Svelte

<!--
Copyright: Ankitects Pty Ltd and contributors
License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
-->
<script context="module" lang="ts">
import type { Writable } from "svelte/store";
const imageToHeightMap = new Map<string, Writable<number>>();
const observer = new ResizeObserver((entries: ResizeObserverEntry[]) => {
for (const entry of entries) {
const image = entry.target as HTMLImageElement;
const store = imageToHeightMap.get(image.dataset.uuid!)!;
store.set(entry.contentRect.height);
setTimeout(() => entry.target.dispatchEvent(new Event("resize")));
}
});
</script>
<script lang="ts">
import { onDestroy } from "svelte";
import { pageTheme } from "../sveltelib/theme";
import { convertMathjax } from "./mathjax";
import { randomUUID } from "../lib/uuid";
import { writable } from "svelte/store";
export let mathjax: string;
export let block: boolean;
export let autofocus = false;
export let fontSize = 20;
$: [converted, title] = convertMathjax(mathjax, $pageTheme.isDark, fontSize);
$: empty = title === "MathJax";
$: encoded = encodeURIComponent(converted);
const uuid = randomUUID();
const imageHeight = writable(0);
imageToHeightMap.set(uuid, imageHeight);
$: verticalCenter = -$imageHeight / 2 + fontSize / 4;
function maybeAutofocus(image: Element): void {
if (!autofocus) {
return;
}
// This should trigger a focusing of the Mathjax Handle
const focusEvent = new CustomEvent("focusmathjax", {
detail: image,
bubbles: true,
composed: true,
});
image.dispatchEvent(focusEvent);
}
function observe(image: Element) {
observer.observe(image);
return {
destroy() {
observer.unobserve(image);
},
};
}
onDestroy(() => imageToHeightMap.delete(uuid));
</script>
<img
src="data:image/svg+xml,{encoded}"
class:block
class:empty
style="--vertical-center: {verticalCenter}px;"
alt="Mathjax"
{title}
data-anki="mathjax"
data-uuid={uuid}
on:dragstart|preventDefault
use:maybeAutofocus
use:observe
/>
<style lang="scss">
:global(anki-mathjax) {
white-space: pre;
}
img {
vertical-align: var(--vertical-center);
}
.block {
display: block;
margin: 1rem auto;
}
.empty {
vertical-align: sub;
}
</style>