fix(frontend): フォーカスの挙動を修正 (#14158)

* fix(frontend): 直前のパターンを記録するように

* fix(frontend): フォーカス/タブ移動に関する挙動を調整 (#226)

Cherry-pick commit e8c030673326871edf3623cf2b8675d68f9e1b13

Co-authored-by: taiyme <53635909+taiyme@users.noreply.github.com>

* focusのデザイン修正

* move scripts

* Modalにfocus trapを追加

* 記録するホットキーはレートリミット式にする

* escキーのハンドリングをMkModalに統一

* fix

* enterで子メニューを開けるように

* lint

* fix focus trap

* improve switch accessibility

* 一部のmodalのフォーカストラップが外れない問題を修正

* fix

* fix

* Revert "記録するホットキーはレートリミット式にする"

This reverts commit 40a7509286.

* Revert "fix(frontend): 直前のパターンを記録するように"

This reverts commit 5372b25940.

* Revert "Revert "fix(frontend): 直前のパターンを記録するように""

This reverts commit a9bb52e799.

* Revert "Revert "記録するホットキーはレートリミット式にする""

This reverts commit bdac34273e.

* 試験的にCypressでのFocustrapを無効化

* fix

* fix focus-trap

* Update Changelog

* ✌️

* fix focustrap invocation logic

* スクロールがsticky headerを考慮するように

* 🎨

* スタイルの微調整

* 🎨

* remove deprecated key aliases

* focusElementが足りなかったので修正

* preview系にfocus時スタイルが足りなかったので修正

* `returnFocusElement` -> `returnFocusTo`

* lint

* Update packages/frontend/src/components/MkModalWindow.vue

* Apply suggestions from code review

Co-authored-by: taiy <53635909+taiyme@users.noreply.github.com>

* keydownイベントをまとめる

* use correct pesudo-element selector

* fix

* rename

---------

Co-authored-by: taiyme <53635909+taiyme@users.noreply.github.com>
Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/components/MkMediaList.vue

@@ -39,6 +39,7 @@ import XVideo from '@/components/MkMediaVideo.vue';
 import * as os from '@/os.js';
 import { FILE_TYPE_BROWSERSAFE } from '@/const.js';
 import { defaultStore } from '@/store.js';
+import { focusParent } from '@/scripts/focus.js';
 
 const props = defineProps<{
 	mediaList: Misskey.entities.DriveFile[];
@@ -49,7 +50,9 @@ const gallery = shallowRef<HTMLDivElement>();
 const pswpZIndex = os.claimZIndex('middle');
 document.documentElement.style.setProperty('--mk-pswp-root-z-index', pswpZIndex.toString());
 const count = computed(() => props.mediaList.filter(media => previewable(media)).length);
-let lightbox: PhotoSwipeLightbox | null;
+let lightbox: PhotoSwipeLightbox | null = null;
+
+let activeEl: HTMLElement | null = null;
 
 const popstateHandler = (): void => {
 	if (lightbox?.pswp && lightbox.pswp.isOpen === true) {
@@ -60,7 +63,7 @@ const popstateHandler = (): void => {
 async function calcAspectRatio() {
 	if (!gallery.value) return;
 
-	let img = props.mediaList[0];
+	const img = props.mediaList[0];
 
 	if (props.mediaList.length !== 1 || !(img.properties.width && img.properties.height)) {
 		gallery.value.style.aspectRatio = '';
@@ -131,6 +134,7 @@ onMounted(() => {
 		bgOpacity: 1,
 		showAnimationDuration: 100,
 		hideAnimationDuration: 100,
+		returnFocus: false,
 		pswpModule: PhotoSwipe,
 	});
 
@@ -159,39 +163,47 @@ onMounted(() => {
 	lightbox.on('uiRegister', () => {
 		lightbox?.pswp?.ui?.registerElement({
 			name: 'altText',
-			className: 'pwsp__alt-text-container',
+			className: 'pswp__alt-text-container',
 			appendTo: 'wrapper',
-			onInit: (el, pwsp) => {
-				let textBox = document.createElement('p');
-				textBox.className = 'pwsp__alt-text _acrylic';
+			onInit: (el, pswp) => {
+				const textBox = document.createElement('p');
+				textBox.className = 'pswp__alt-text _acrylic';
 				el.appendChild(textBox);
 
-				pwsp.on('change', () => {
-					textBox.textContent = pwsp.currSlide?.data.comment;
+				pswp.on('change', () => {
+					textBox.textContent = pswp.currSlide?.data.comment;
 				});
 			},
 		});
 	});
 
-	lightbox.init();
-
-	window.addEventListener('popstate', popstateHandler);
-
-	lightbox.on('beforeOpen', () => {
+	lightbox.on('afterInit', () => {
+		activeEl = document.activeElement instanceof HTMLElement ? document.activeElement : null;
+		focusParent(activeEl, true, true);
+		lightbox?.pswp?.element?.focus({
+			preventScroll: true,
+		});
 		history.pushState(null, '', '#pswp');
 	});
 
-	lightbox.on('close', () => {
+	lightbox.on('destroy', () => {
+		focusParent(activeEl, true, false);
+		activeEl = null;
 		if (window.location.hash === '#pswp') {
 			history.back();
 		}
 	});
+
+	window.addEventListener('popstate', popstateHandler);
+
+	lightbox.init();
 });
 
 onUnmounted(() => {
 	window.removeEventListener('popstate', popstateHandler);
 	lightbox?.destroy();
 	lightbox = null;
+	activeEl = null;
 });
 
 const previewable = (file: Misskey.entities.DriveFile): boolean => {
@@ -199,6 +211,16 @@ const previewable = (file: Misskey.entities.DriveFile): boolean => {
 	// FILE_TYPE_BROWSERSAFEに適合しないものはブラウザで表示するのに不適切
 	return (file.type.startsWith('video') || file.type.startsWith('image')) && FILE_TYPE_BROWSERSAFE.includes(file.type);
 };
+
+const openGallery = () => {
+	if (props.mediaList.filter(media => previewable(media)).length > 0) {
+		lightbox?.loadAndOpen(0);
+	}
+};
+
+defineExpose({
+	openGallery,
+});
 </script>
 
 <style lang="scss" module>
@@ -298,7 +320,7 @@ const previewable = (file: Misskey.entities.DriveFile): boolean => {
 	backdrop-filter: var(--modalBgFilter);
 }
 
-.pwsp__alt-text-container {
+.pswp__alt-text-container {
 	display: flex;
 	flex-direction: row;
 	align-items: center;
@@ -312,7 +334,7 @@ const previewable = (file: Misskey.entities.DriveFile): boolean => {
 	max-width: 800px;
 }
 
-.pwsp__alt-text {
+.pswp__alt-text {
 	color: var(--fg);
 	margin: 0 auto;
 	text-align: center;