fix: v-sizeディレクティブの動作を修正 (#8249)
* Fix size directive behavior not activated * calc * wip * cache computed classes * fix Vue3では使えなくなった * 不要なIntersection Observerを削除 * comment
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tamaina
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@ -1,34 +1,55 @@
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import { Directive } from 'vue';
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const mountings = new Map<Element, {
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resize: ResizeObserver;
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intersection?: IntersectionObserver;
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fn: (w: number, h: number) => void;
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}>();
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function calc(src: Element) {
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const info = mountings.get(src);
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const height = src.clientHeight;
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const width = src.clientWidth;
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if (!info) return;
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// アクティベート前などでsrcが描画されていない場合
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if (!height) {
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// IntersectionObserverで表示検出する
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if (!info.intersection) {
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info.intersection = new IntersectionObserver(entries => {
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if (entries.some(entry => entry.isIntersecting)) calc(src);
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});
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}
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info.intersection.observe(src);
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return;
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}
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if (info.intersection) {
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info.intersection.disconnect()
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delete info.intersection;
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};
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info.fn(width, height);
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};
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export default {
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mounted(src, binding, vn) {
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const calc = () => {
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const height = src.clientHeight;
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const width = src.clientWidth;
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// 要素が(一時的に)DOMに存在しないときは計算スキップ
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if (height === 0) return;
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binding.value(width, height);
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};
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calc();
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// Vue3では使えなくなった
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// 無くても大丈夫か...？
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// TODO: ↑大丈夫じゃなかったので解決策を探す
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//vn.context.$on('hook:activated', calc);
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const ro = new ResizeObserver((entries, observer) => {
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calc();
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const resize = new ResizeObserver((entries, observer) => {
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calc(src);
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});
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ro.observe(src);
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resize.observe(src);
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src._get_size_ro_ = ro;
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mountings.set(src, { resize, fn: binding.value, });
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calc(src);
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},
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unmounted(src, binding, vn) {
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binding.value(0, 0);
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src._get_size_ro_.unobserve(src);
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const info = mountings.get(src);
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if (!info) return;
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info.resize.disconnect();
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if (info.intersection) info.intersection.disconnect();
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mountings.delete(src);
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}
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} as Directive;
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} as Directive<Element, (w: number, h: number) => void>;
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@ -1,68 +1,107 @@
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import { Directive } from 'vue';
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type Value = { max?: number[]; min?: number[]; };
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//const observers = new Map<Element, ResizeObserver>();
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const mountings = new Map<Element, {
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value: Value;
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resize: ResizeObserver;
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intersection?: IntersectionObserver;
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previousWidth: number;
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}>();
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type ClassOrder = {
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add: string[];
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remove: string[];
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};
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const cache = new Map<string, ClassOrder>();
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function getClassOrder(width: number, queue: Value): ClassOrder {
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const getMaxClass = (v: number) => `max-width_${v}px`;
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const getMinClass = (v: number) => `min-width_${v}px`;
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return {
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add: [
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...(queue.max ? queue.max.filter(v => width <= v).map(getMaxClass) : []),
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...(queue.min ? queue.min.filter(v => width >= v).map(getMinClass) : []),
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],
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remove: [
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...(queue.max ? queue.max.filter(v => width > v).map(getMaxClass) : []),
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...(queue.min ? queue.min.filter(v => width < v).map(getMinClass) : []),
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]
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};
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}
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function applyClassOrder(el: Element, order: ClassOrder) {
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el.classList.add(...order.add);
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el.classList.remove(...order.remove);
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}
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function getOrderName(width: number, queue: Value): string {
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return `${width}|${queue.max ? queue.max.join(',') : ''}|${queue.min ? queue.min.join(',') : ''}`;
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}
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function calc(el: Element) {
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const info = mountings.get(el);
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const width = el.clientWidth;
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if (!info || info.previousWidth === width) return;
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// アクティベート前などでsrcが描画されていない場合
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if (!width) {
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// IntersectionObserverで表示検出する
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if (!info.intersection) {
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info.intersection = new IntersectionObserver(entries => {
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if (entries.some(entry => entry.isIntersecting)) calc(el);
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});
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}
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info.intersection.observe(el);
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return;
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}
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if (info.intersection) {
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info.intersection.disconnect()
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delete info.intersection;
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};
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mountings.set(el, Object.assign(info, { previousWidth: width }));
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const cached = cache.get(getOrderName(width, info.value));
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if (cached) {
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applyClassOrder(el, cached);
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} else {
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const order = getClassOrder(width, info.value);
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cache.set(getOrderName(width, info.value), order);
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applyClassOrder(el, order);
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}
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}
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export default {
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mounted(src, binding, vn) {
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const query = binding.value;
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const resize = new ResizeObserver((entries, observer) => {
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calc(src);
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});
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const addClass = (el: Element, cls: string) => {
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el.classList.add(cls);
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};
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mountings.set(src, {
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value: binding.value,
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resize,
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previousWidth: 0,
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});
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const removeClass = (el: Element, cls: string) => {
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el.classList.remove(cls);
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};
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calc(src);
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resize.observe(src);
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},
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const calc = () => {
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const width = src.clientWidth;
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// 要素が(一時的に)DOMに存在しないときは計算スキップ
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if (width === 0) return;
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if (query.max) {
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for (const v of query.max) {
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if (width <= v) {
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addClass(src, 'max-width_' + v + 'px');
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} else {
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removeClass(src, 'max-width_' + v + 'px');
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}
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}
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}
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if (query.min) {
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for (const v of query.min) {
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if (width >= v) {
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addClass(src, 'min-width_' + v + 'px');
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} else {
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removeClass(src, 'min-width_' + v + 'px');
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}
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}
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}
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};
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calc();
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window.addEventListener('resize', calc);
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// Vue3では使えなくなった
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// 無くても大丈夫か...？
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// TODO: ↑大丈夫じゃなかったので解決策を探す
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//vn.context.$on('hook:activated', calc);
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//const ro = new ResizeObserver((entries, observer) => {
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// calc();
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//});
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//ro.observe(el);
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// TODO: 新たにプロパティを作るのをやめMapを使う
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// ただメモリ的には↓の方が省メモリかもしれないので検討中
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//el._ro_ = ro;
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src._calc_ = calc;
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updated(src, binding, vn) {
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mountings.set(src, Object.assign({}, mountings.get(src), { value: binding.value }));
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calc(src);
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},
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unmounted(src, binding, vn) {
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//el._ro_.unobserve(el);
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window.removeEventListener('resize', src._calc_);
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const info = mountings.get(src);
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if (!info) return;
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info.resize.disconnect();
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if (info.intersection) info.intersection.disconnect();
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mountings.delete(src);
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}
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} as Directive;
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} as Directive<Element, Value>;
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