feat(frontend): 画像を投稿前にプレビュー可能に (#15341)

* feat(client): 画像をプレビュー可能に

* Update Changelog

* SPDX

* 消えてたのFix

* Add storybook for MkImgPreviewDialog

* backgroundのスタイル変更

Co-authored-by: kakkokari-gtyih <67428053+kakkokari-gtyih@users.noreply.github.com>

* Add MkImgPreviewDialog to storybook generator

* Update packages/frontend/.storybook/generate.tsx

---------

Co-authored-by: kakkokari-gtyih <67428053+kakkokari-gtyih@users.noreply.github.com>

4 files changed, 115 insertions, 4 deletions

diff --git a/packages/frontend/.storybook/generate.tsx b/packages/frontend/.storybook/generate.tsx
index 8830523810..3cd08191f5 100644
--- a/packages/frontend/.storybook/generate.tsx
+++ b/packages/frontend/.storybook/generate.tsx
@@ -414,6 +414,7 @@ function toStories(component: string): Promise<string> {
 		glob('src/components/MkSignupServerRules.vue'),
 		glob('src/components/MkUserSetupDialog.vue'),
 		glob('src/components/MkUserSetupDialog.*.vue'),
+		glob('src/components/MkImgPreviewDialog.vue'),
 		glob('src/components/MkInstanceCardMini.vue'),
 		glob('src/components/MkInviteCode.vue'),
 		glob('src/components/MkTagItem.vue'),
diff --git a/packages/frontend/src/components/MkImgPreviewDialog.stories.impl.ts b/packages/frontend/src/components/MkImgPreviewDialog.stories.impl.ts
new file mode 100644
index 0000000000..339e6d10f3
--- /dev/null
+++ b/packages/frontend/src/components/MkImgPreviewDialog.stories.impl.ts
@@ -0,0 +1,40 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { StoryObj } from '@storybook/vue3';
+import { file } from '../../.storybook/fakes.js';
+import MkImgPreviewDialog from './MkImgPreviewDialog.vue';
+export const Default = {
+	render(args) {
+		return {
+			components: {
+				MkImgPreviewDialog,
+			},
+			setup() {
+				return {
+					args,
+				};
+			},
+			computed: {
+				props() {
+					return {
+						...this.args,
+					};
+				},
+			},
+			template: '<MkImgPreviewDialog v-bind="props" />',
+		};
+	},
+	args: {
+		file: file(),
+	},
+	parameters: {
+		chromatic: {
+			// NOTE: ロードが終わるまで待つ
+			delay: 3000,
+		},
+		layout: 'centered',
+	},
+} satisfies StoryObj<typeof MkImgPreviewDialog>;
diff --git a/packages/frontend/src/components/MkImgPreviewDialog.vue b/packages/frontend/src/components/MkImgPreviewDialog.vue
new file mode 100644
index 0000000000..3e6e4e0ec9
--- /dev/null
+++ b/packages/frontend/src/components/MkImgPreviewDialog.vue
@@ -0,0 +1,58 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<MkModalWindow
+	ref="modal"
+	:width="1800"
+	:height="900"
+	@close="close"
+	@esc="close"
+	@click="close"
+>
+	<template #header>{{ file.name }}</template>
+	<div :class="$style.container">
+		<img :src="file.url" :alt="file.comment ?? file.name" :class="$style.img"/>
+	</div>
+</MkModalWindow>
+</template>
+<script lang="ts" setup>
+import { defineProps, ref } from 'vue';
+import MkModalWindow from './MkModalWindow.vue';
+import type * as Misskey from 'misskey-js';
+
+defineProps<{
+	file: Misskey.entities.DriveFile;
+}>();
+
+const modal = ref<typeof MkModalWindow | null>(null);
+
+function close() {
+	modal.value?.close();
+}
+
+</script>
+<style lang="scss" module>
+	.container {
+		box-sizing: border-box;
+		width: 100%;
+		height: 100%;
+		min-height: 0;
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		overflow: hidden;
+
+		background-color: var(--MI_THEME-bg);
+		background-size: auto auto;
+		background-image: repeating-linear-gradient(135deg, transparent, transparent 6px, var(--MI_THEME-panel) 6px, var(--MI_THEME-panel) 12px);
+	}
+
+	.img {
+		width: 100%;
+		max-height: 100%;
+		object-fit: contain;
+	}
+</style>
diff --git a/packages/frontend/src/components/MkPostFormAttaches.vue b/packages/frontend/src/components/MkPostFormAttaches.vue
index 1336b61356..33fe82b759 100644
--- a/packages/frontend/src/components/MkPostFormAttaches.vue
+++ b/packages/frontend/src/components/MkPostFormAttaches.vue
@@ -22,20 +22,24 @@ SPDX-License-Identifier: AGPL-3.0-only
 			</div>
 		</template>
 	</Sortable>
-	<p :class="[$style.remain, {
-		[$style.exceeded]: props.modelValue.length > 16,
-	}]">{{ 16 - props.modelValue.length }}/16</p>
+	<p
+		:class="[$style.remain, {
+			[$style.exceeded]: props.modelValue.length > 16,
+		}]"
+	>
+		{{ 16 - props.modelValue.length }}/16
+	</p>
 </div>
 </template>
 
 <script lang="ts" setup>
 import { defineAsyncComponent, inject } from 'vue';
 import * as Misskey from 'misskey-js';
+import type { MenuItem } from '@/types/menu';
 import MkDriveFileThumbnail from '@/components/MkDriveFileThumbnail.vue';
 import * as os from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
 import { i18n } from '@/i18n.js';
-import type { MenuItem } from '@/types/menu.js';
 
 const Sortable = defineAsyncComponent(() => import('vuedraggable').then(x => x.default));
 
@@ -168,6 +172,14 @@ function showFileMenu(file: Misskey.entities.DriveFile, ev: MouseEvent | Keyboar
 			text: i18n.ts.cropImage,
 			icon: 'ti ti-crop',
 			action: () : void => { crop(file); },
+		}, {
+			text: i18n.ts.preview,
+			icon: 'ti ti-photo-search',
+			action: () => {
+				os.popup(defineAsyncComponent(() => import('@/components/MkImgPreviewDialog.vue')), {
+					file: file,
+				});
+			},
 		});
 	}