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Fix return behavior on Mathjax decorated element

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This commit is contained in:
Henrik Giesel 2021-08-07 03:37:03 +02:00
parent 4576ce8cc3
commit 9ef4bb15c6
1 changed files with 15 additions and 0 deletions
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15
ts/editable/mathjax-component.ts
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@ -40,12 +40,25 @@ function placeCaretAfter(node: Node): void {
function moveNodesInsertedOutside(element: Element, allowedChild: Node): () => void {
const observer = new MutationObserver(() => {
if (element.childNodes.length === 1) {
return;
}
const childNodes = [...element.childNodes];
const allowedIndex = childNodes.findIndex((child) => child === allowedChild);
const beforeChildren = childNodes.slice(0, allowedIndex);
const afterChildren = childNodes.slice(allowedIndex + 1);
// Special treatment for pressing return after mathjax block
if (
afterChildren.length === 2 &&
afterChildren.every((child) => (child as Element).tagName === "BR")
) {
const first = afterChildren.pop();
element.removeChild(first!);
}
let lastNode: Node | null = null;
for (const node of beforeChildren) {
@ -140,6 +153,7 @@ export const Mathjax: DecoratedElementConstructor = class Mathjax
decorate(): void {
const mathjax = (this.dataset.mathjax = this.innerText);
this.innerHTML = "";
this.style.whiteSpace = "normal";
this.component = new Mathjax_svelte({
target: this,
@ -150,6 +164,7 @@ export const Mathjax: DecoratedElementConstructor = class Mathjax
undecorate(): void {
this.innerHTML = this.dataset.mathjax ?? "";
delete this.dataset.mathjax;
this.removeAttribute("style");
this.component?.$destroy();
this.component = undefined;