mirror of
https://github.com/go-gitea/gitea
synced 2025-03-10 20:54:30 +00:00
698ae7aa5b
1. Rewrite `dirauto.ts` to `observer.ts`.
* We have been using MutationObserver for long time, it's proven that it
is quite performant.
* Now we extend its ability to handle more "init" works.
2. Use `observeAddedElement` to init all non-custom "dropdown".
3. Use `data-global-click` to handle click events from dynamically
loaded elements.
* By this new approach, the old fragile selector-based
(`.comment-reaction-button`) mechanism is removed.
4. By the way, remove unused `.diff-box` selector, it was abused and
never really used.
A lot of FIXMEs in "repo-diff.ts" are completely fixed, newly loaded
contents could work as expected.
90 lines
3.1 KiB
TypeScript
90 lines
3.1 KiB
TypeScript
import {isDocumentFragmentOrElementNode} from '../utils/dom.ts';
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type DirElement = HTMLInputElement | HTMLTextAreaElement;
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// for performance considerations, it only uses performant syntax
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function attachDirAuto(el: Partial<DirElement>) {
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if (el.type !== 'hidden' &&
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el.type !== 'checkbox' &&
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el.type !== 'radio' &&
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el.type !== 'range' &&
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el.type !== 'color') {
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el.dir = 'auto';
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}
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}
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type GlobalInitFunc<T extends HTMLElement> = (el: T) => void | Promise<void>;
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const globalInitFuncs: Record<string, GlobalInitFunc<HTMLElement>> = {};
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function attachGlobalInit(el: HTMLElement) {
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const initFunc = el.getAttribute('data-global-init');
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const func = globalInitFuncs[initFunc];
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if (!func) throw new Error(`Global init function "${initFunc}" not found`);
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func(el);
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}
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type GlobalEventFunc<T extends HTMLElement, E extends Event> = (el: T, e: E) => (void | Promise<void>);
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const globalEventFuncs: Record<string, GlobalEventFunc<HTMLElement, Event>> = {};
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export function registerGlobalEventFunc<T extends HTMLElement, E extends Event>(event: string, name: string, func: GlobalEventFunc<T, E>) {
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globalEventFuncs[`${event}:${name}`] = func as any;
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}
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type SelectorHandler = {
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selector: string,
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handler: (el: HTMLElement) => void,
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};
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const selectorHandlers: SelectorHandler[] = [
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{selector: 'input, textarea', handler: attachDirAuto},
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{selector: '[data-global-init]', handler: attachGlobalInit},
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];
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export function observeAddedElement(selector: string, handler: (el: HTMLElement) => void) {
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selectorHandlers.push({selector, handler});
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const docNodes = document.querySelectorAll<HTMLElement>(selector);
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for (const el of docNodes) {
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handler(el);
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}
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}
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export function initAddedElementObserver(): void {
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const observer = new MutationObserver((mutationList) => {
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const len = mutationList.length;
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for (let i = 0; i < len; i++) {
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const mutation = mutationList[i];
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const len = mutation.addedNodes.length;
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for (let i = 0; i < len; i++) {
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const addedNode = mutation.addedNodes[i] as HTMLElement;
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if (!isDocumentFragmentOrElementNode(addedNode)) continue;
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for (const {selector, handler} of selectorHandlers) {
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if (addedNode.matches(selector)) {
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handler(addedNode);
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}
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const children = addedNode.querySelectorAll<HTMLElement>(selector);
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for (const el of children) {
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handler(el);
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}
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}
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}
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}
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});
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for (const {selector, handler} of selectorHandlers) {
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const docNodes = document.querySelectorAll<HTMLElement>(selector);
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for (const el of docNodes) {
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handler(el);
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}
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}
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observer.observe(document, {subtree: true, childList: true});
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document.addEventListener('click', (e) => {
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const elem = (e.target as HTMLElement).closest<HTMLElement>('[data-global-click]');
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if (!elem) return;
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const funcName = elem.getAttribute('data-global-click');
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const func = globalEventFuncs[`click:${funcName}`];
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if (!func) throw new Error(`Global event function "click:${funcName}" not found`);
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func(elem, e);
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});
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}
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