enhance(frontend): 投稿フォームにアップローダーを埋め込み (#16173)

* wip

* Update MkPostForm.vue

* wip

* wip

* Update MkPostForm.vue

* wip

* wip

* add tip

* Update tips.ts

* Update MkPostForm.vue

6 files changed, 858 insertions, 660 deletions

diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index cd4fabea02..46893a0752 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -72,24 +72,29 @@ SPDX-License-Identifier: AGPL-3.0-only
 	</div>
 	<input v-show="withHashtags" ref="hashtagsInputEl" v-model="hashtags" :class="$style.hashtags" :placeholder="i18n.ts.hashtags" list="hashtags">
 	<XPostFormAttaches v-model="files" @detach="detachFile" @changeSensitive="updateFileSensitive" @changeName="updateFileName"/>
+	<div v-if="uploader.items.value.length > 0" style="padding: 12px;">
+		<MkTip k="postFormUploader">
+			{{ i18n.ts._postForm.uploaderTip }}
+		</MkTip>
+		<MkUploaderItems :items="uploader.items.value" @showMenu="(item, ev) => showPerUploadItemMenu(item, ev)" @showMenuViaContextmenu="(item, ev) => showPerUploadItemMenuViaContextmenu(item, ev)"/>
+	</div>
 	<MkPollEditor v-if="poll" v-model="poll" @destroyed="poll = null"/>
 	<MkNotePreview v-if="showPreview" :class="$style.preview" :text="text" :files="files" :poll="poll ?? undefined" :useCw="useCw" :cw="cw" :user="postAccount ?? $i"/>
 	<div v-if="showingOptions" style="padding: 8px 16px;">
 	</div>
 	<footer :class="$style.footer">
 		<div :class="$style.footerLeft">
-			<button v-tooltip="i18n.ts.attachFile" class="_button" :class="$style.footerButton" @click="chooseFileFrom"><i class="ti ti-photo-plus"></i></button>
+			<button v-tooltip="i18n.ts.attachFile + ' (' + i18n.ts.upload + ')'" class="_button" :class="$style.footerButton" @click="chooseFileFromPc"><i class="ti ti-photo-plus"></i></button>
+			<button v-tooltip="i18n.ts.attachFile + ' (' + i18n.ts.fromDrive + ')'" class="_button" :class="$style.footerButton" @click="chooseFileFromDrive"><i class="ti ti-cloud-download"></i></button>
 			<button v-tooltip="i18n.ts.poll" class="_button" :class="[$style.footerButton, { [$style.footerButtonActive]: poll }]" @click="togglePoll"><i class="ti ti-chart-arrows"></i></button>
 			<button v-tooltip="i18n.ts.useCw" class="_button" :class="[$style.footerButton, { [$style.footerButtonActive]: useCw }]" @click="useCw = !useCw"><i class="ti ti-eye-off"></i></button>
-			<button v-tooltip="i18n.ts.mention" class="_button" :class="$style.footerButton" @click="insertMention"><i class="ti ti-at"></i></button>
 			<button v-tooltip="i18n.ts.hashtags" class="_button" :class="[$style.footerButton, { [$style.footerButtonActive]: withHashtags }]" @click="withHashtags = !withHashtags"><i class="ti ti-hash"></i></button>
-			<button v-if="postFormActions.length > 0" v-tooltip="i18n.ts.plugins" class="_button" :class="$style.footerButton" @click="showActions"><i class="ti ti-plug"></i></button>
-			<button v-tooltip="i18n.ts.emoji" :class="['_button', $style.footerButton]" @click="insertEmoji"><i class="ti ti-mood-happy"></i></button>
+			<button v-tooltip="i18n.ts.mention" class="_button" :class="$style.footerButton" @click="insertMention"><i class="ti ti-at"></i></button>
 			<button v-if="showAddMfmFunction" v-tooltip="i18n.ts.addMfmFunction" :class="['_button', $style.footerButton]" @click="insertMfmFunction"><i class="ti ti-palette"></i></button>
+			<button v-if="postFormActions.length > 0" v-tooltip="i18n.ts.plugins" class="_button" :class="$style.footerButton" @click="showActions"><i class="ti ti-plug"></i></button>
 		</div>
 		<div :class="$style.footerRight">
-			<button v-tooltip="i18n.ts.previewNoteText" class="_button" :class="[$style.footerButton, { [$style.previewButtonActive]: showPreview }]" @click="showPreview = !showPreview"><i class="ti ti-eye"></i></button>
-			<!--<button v-tooltip="i18n.ts.more" class="_button" :class="$style.footerButton" @click="showingOptions = !showingOptions"><i class="ti ti-dots"></i></button>-->
+			<button v-tooltip="i18n.ts.emoji" :class="['_button', $style.footerButton]" @click="insertEmoji"><i class="ti ti-mood-happy"></i></button>
 		</div>
 	</footer>
 	<datalist id="hashtags">
@@ -105,10 +110,12 @@ import * as Misskey from 'misskey-js';
 import insertTextAtCursor from 'insert-text-at-cursor';
 import { toASCII } from 'punycode.js';
 import { host, url } from '@@/js/config.js';
+import MkUploaderItems from './MkUploaderItems.vue';
 import type { ShallowRef } from 'vue';
 import type { PostFormProps } from '@/types/post-form.js';
 import type { MenuItem } from '@/types/menu.js';
 import type { PollEditorModelValue } from '@/components/MkPollEditor.vue';
+import type { UploaderItem } from '@/composables/use-uploader.js';
 import MkNotePreview from '@/components/MkNotePreview.vue';
 import XPostFormAttaches from '@/components/MkPostFormAttaches.vue';
 import XTextCounter from '@/components/MkPostForm.TextCounter.vue';
@@ -120,7 +127,7 @@ import { formatTimeString } from '@/utility/format-time-string.js';
 import { Autocomplete } from '@/utility/autocomplete.js';
 import * as os from '@/os.js';
 import { misskeyApi } from '@/utility/misskey-api.js';
-import { selectFile } from '@/utility/drive.js';
+import { chooseDriveFile } from '@/utility/drive.js';
 import { store } from '@/store.js';
 import MkInfo from '@/components/MkInfo.vue';
 import { i18n } from '@/i18n.js';
@@ -138,6 +145,7 @@ import { getPluginHandlers } from '@/plugin.js';
 import { DI } from '@/di.js';
 import { globalEvents } from '@/events.js';
 import { checkDragDataType, getDragData } from '@/drag-and-drop.js';
+import { useUploader } from '@/composables/use-uploader.js';
 
 const $i = ensureSignin();
 
@@ -201,6 +209,15 @@ const justEndedComposition = ref(false);
 const renoteTargetNote: ShallowRef<PostFormProps['renote'] | null> = shallowRef(props.renote);
 const postFormActions = getPluginHandlers('post_form_action');
 
+const uploader = useUploader({
+	multiple: true,
+});
+
+uploader.events.on('itemUploaded', ctx => {
+	files.value.push(ctx.item.uploaded!);
+	uploader.removeItem(ctx.item);
+});
+
 const draftKey = computed((): string => {
 	let key = props.channel ? `channel:${props.channel.id}` : '';
 
@@ -258,10 +275,11 @@ const cwTextLength = computed((): number => {
 const maxCwTextLength = 100;
 
 const canPost = computed((): boolean => {
-	return !props.mock && !posting.value && !posted.value &&
+	return !props.mock && !posting.value && !posted.value && !uploader.uploading.value && (uploader.items.value.length === 0 || uploader.readyForUpload.value) &&
 		(
 			1 <= textLength.value ||
 			1 <= files.value.length ||
+			1 <= uploader.items.value.length ||
 			poll.value != null ||
 			renoteTargetNote.value != null ||
 			quoteId.value != null
@@ -434,17 +452,20 @@ function focus() {
 	}
 }
 
-function chooseFileFrom(ev) {
+function chooseFileFromPc(ev: MouseEvent) {
 	if (props.mock) return;
 
-	selectFile({
-		anchorElement: ev.currentTarget ?? ev.target,
-		multiple: true,
-		label: i18n.ts.attachFile,
-	}).then(files_ => {
-		for (const file of files_) {
-			files.value.push(file);
-		}
+	os.chooseFileFromPc({ multiple: true }).then(files => {
+		if (files.length === 0) return;
+		uploader.addFiles(files);
+	});
+}
+
+function chooseFileFromDrive(ev: MouseEvent) {
+	if (props.mock) return;
+
+	chooseDriveFile({ multiple: true }).then(driveFiles => {
+		files.value.push(...driveFiles);
 	});
 }
 
@@ -571,6 +592,10 @@ function showOtherSettings() {
 			toggleReactionAcceptance();
 		},
 	}, { type: 'divider' }, {
+		type: 'switch',
+		text: i18n.ts.preview,
+		ref: showPreview,
+	}, {
 		icon: 'ti ti-trash',
 		text: i18n.ts.reset,
 		danger: true,
@@ -797,6 +822,15 @@ function isAnnoying(text: string): boolean {
 		text.includes('$[position');
 }
 
+async function uploadFiles() {
+	await uploader.upload();
+
+	for (const uploadedItem of uploader.items.value.filter(x => x.uploaded != null)) {
+		files.value.push(uploadedItem.uploaded!);
+		uploader.removeItem(uploadedItem);
+	}
+}
+
 async function post(ev?: MouseEvent) {
 	if (ev) {
 		const el = (ev.currentTarget ?? ev.target) as HTMLElement | null;
@@ -840,6 +874,10 @@ async function post(ev?: MouseEvent) {
 		}
 	}
 
+	if (uploader.items.value.some(x => x.uploaded == null)) {
+		await uploadFiles();
+	}
+
 	let postData = {
 		text: text.value === '' ? null : text.value,
 		fileIds: files.value.length > 0 ? files.value.map(f => f.id) : undefined,
@@ -1043,6 +1081,16 @@ function openAccountMenu(ev: MouseEvent) {
 	}, ev);
 }
 
+function showPerUploadItemMenu(item: UploaderItem, ev: MouseEvent) {
+	const menu = uploader.getMenu(item);
+	os.popupMenu(menu, ev.currentTarget ?? ev.target);
+}
+
+function showPerUploadItemMenuViaContextmenu(item: UploaderItem, ev: MouseEvent) {
+	const menu = uploader.getMenu(item);
+	os.contextMenu(menu, ev);
+}
+
 onMounted(() => {
 	if (props.autofocus) {
 		focus();
@@ -1111,8 +1159,23 @@ onMounted(() => {
 	});
 });
 
+async function canClose() {
+	if (!uploader.allItemsUploaded.value) {
+		const { canceled } = await os.confirm({
+			type: 'question',
+			text: i18n.ts._postForm.quitInspiteOfThereAreUnuploadedFilesConfirm,
+			okText: i18n.ts.yes,
+			cancelText: i18n.ts.no,
+		});
+		if (canceled) return false;
+	}
+
+	return true;
+}
+
 defineExpose({
 	clear,
+	canClose,
 });
 </script>
 
diff --git a/packages/frontend/src/components/MkPostFormDialog.vue b/packages/frontend/src/components/MkPostFormDialog.vue
index c467e29df6..0a655bab99 100644
--- a/packages/frontend/src/components/MkPostFormDialog.vue
+++ b/packages/frontend/src/components/MkPostFormDialog.vue
@@ -7,9 +7,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 <MkModal
 	ref="modal"
 	:preferType="'dialog'"
-	@click="modal?.close()"
+	@click="_close()"
 	@closed="onModalClosed()"
-	@esc="modal?.close()"
+	@esc="_close()"
 >
 	<MkPostForm
 		ref="form"
@@ -18,8 +18,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 		autofocus
 		freezeAfterPosted
 		@posted="onPosted"
-		@cancel="modal?.close()"
-		@esc="modal?.close()"
+		@cancel="_close()"
+		@esc="_close()"
 	/>
 </MkModal>
 </template>
@@ -43,6 +43,7 @@ const emit = defineEmits<{
 }>();
 
 const modal = useTemplateRef('modal');
+const form = useTemplateRef('form');
 
 function onPosted() {
 	modal.value?.close({
@@ -50,6 +51,12 @@ function onPosted() {
 	});
 }
 
+async function _close() {
+	const canClose = await form.value?.canClose();
+	if (!canClose) return;
+	modal.value?.close();
+}
+
 function onModalClosed() {
 	emit('closed');
 }
diff --git a/packages/frontend/src/components/MkUploaderDialog.vue b/packages/frontend/src/components/MkUploaderDialog.vue
index 6a0909bded..ce098d71e4 100644
--- a/packages/frontend/src/components/MkUploaderDialog.vue
+++ b/packages/frontend/src/components/MkUploaderDialog.vue
@@ -23,37 +23,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				{{ i18n.ts._uploader.tip }}
 			</MkTip>
 
-			<div class="_gaps_s">
-				<div
-					v-for="ctx in items"
-					:key="ctx.id"
-					v-panel
-					:class="[$style.item, ctx.preprocessing ? $style.itemWaiting : null, ctx.uploaded ? $style.itemCompleted : null, ctx.uploadFailed ? $style.itemFailed : null]"
-					:style="{ '--p': ctx.progress != null ? `${ctx.progress.value / ctx.progress.max * 100}%` : '0%' }"
-				>
-					<div :class="$style.itemInner">
-						<div :class="$style.itemActionWrapper">
-							<MkButton :iconOnly="true" rounded @click="showMenu($event, ctx)"><i class="ti ti-dots"></i></MkButton>
-						</div>
-						<div :class="$style.itemThumbnail" :style="{ backgroundImage: `url(${ ctx.thumbnail })` }"></div>
-						<div :class="$style.itemBody">
-							<div><MkCondensedLine :minScale="2 / 3">{{ ctx.name }}</MkCondensedLine></div>
-							<div :class="$style.itemInfo">
-								<span>{{ ctx.file.type }}</span>
-								<span v-if="ctx.compressedSize">({{ i18n.tsx._uploader.compressedToX({ x: bytes(ctx.compressedSize) }) }} = {{ i18n.tsx._uploader.savedXPercent({ x: Math.round((1 - ctx.compressedSize / ctx.file.size) * 100) }) }})</span>
-								<span v-else>{{ bytes(ctx.file.size) }}</span>
-							</div>
-							<div>
-							</div>
-						</div>
-						<div :class="$style.itemIconWrapper">
-							<MkSystemIcon v-if="ctx.uploading" :class="$style.itemIcon" type="waiting"/>
-							<MkSystemIcon v-else-if="ctx.uploaded" :class="$style.itemIcon" type="success"/>
-							<MkSystemIcon v-else-if="ctx.uploadFailed" :class="$style.itemIcon" type="error"/>
-						</div>
-					</div>
-				</div>
-			</div>
+			<MkUploaderItems :items="items" @showMenu="(item, ev) => showPerItemMenu(item, ev)" @showMenuViaContextmenu="(item, ev) => showPerItemMenuViaContextmenu(item, ev)"/>
 
 			<div v-if="props.multiple">
 				<MkButton style="margin: auto;" :iconOnly="true" rounded @click="chooseFile($event)"><i class="ti ti-plus"></i></MkButton>
@@ -69,8 +39,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 	<template #footer>
 		<div class="_buttonsCenter">
-			<MkButton v-if="isUploading" rounded @click="abortWithConfirm()"><i class="ti ti-x"></i> {{ i18n.ts.abort }}</MkButton>
-			<MkButton v-else-if="!firstUploadAttempted" primary rounded @click="upload()"><i class="ti ti-upload"></i> {{ i18n.ts.upload }}</MkButton>
+			<MkButton v-if="uploader.uploading.value" rounded @click="abortWithConfirm()"><i class="ti ti-x"></i> {{ i18n.ts.abort }}</MkButton>
+			<MkButton v-else-if="!firstUploadAttempted" primary rounded :disabled="!uploader.readyForUpload.value" @click="upload()"><i class="ti ti-upload"></i> {{ i18n.ts.upload }}</MkButton>
 
 			<MkButton v-if="canRetry" rounded @click="upload()"><i class="ti ti-reload"></i> {{ i18n.ts.retry }}</MkButton>
 			<MkButton v-if="canDone" rounded @click="done()"><i class="ti ti-arrow-right"></i> {{ i18n.ts.done }}</MkButton>
@@ -79,110 +49,51 @@ SPDX-License-Identifier: AGPL-3.0-only
 </MkModalWindow>
 </template>
 
-<script lang="ts">
-export type UploaderDialogFeatures = {
-	effect?: boolean;
-	watermark?: boolean;
-	crop?: boolean;
-};
-</script>
-
 <script lang="ts" setup>
-import { computed, markRaw, onMounted, onUnmounted, ref, triggerRef, useTemplateRef, watch } from 'vue';
+import { computed, onMounted, ref, useTemplateRef, watch } from 'vue';
 import * as Misskey from 'misskey-js';
-import { readAndCompressImage } from '@misskey-dev/browser-image-resizer';
-import isAnimated from 'is-file-animated';
-import type { MenuItem } from '@/types/menu.js';
-import { genId } from '@/utility/id.js';
+import type { UploaderFeatures, UploaderItem } from '@/composables/use-uploader.js';
 import MkModalWindow from '@/components/MkModalWindow.vue';
 import { i18n } from '@/i18n.js';
-import { prefer } from '@/preferences.js';
 import MkButton from '@/components/MkButton.vue';
-import bytes from '@/filters/bytes.js';
-import { isWebpSupported } from '@/utility/isWebpSupported.js';
-import { uploadFile, UploadAbortedError } from '@/utility/drive.js';
 import * as os from '@/os.js';
 import { ensureSignin } from '@/i.js';
-import { WatermarkRenderer } from '@/utility/watermark.js';
+import { useUploader } from '@/composables/use-uploader.js';
+import MkUploaderItems from '@/components/MkUploaderItems.vue';
 
 const $i = ensureSignin();
 
-const COMPRESSION_SUPPORTED_TYPES = [
-	'image/jpeg',
-	'image/png',
-	'image/webp',
-	'image/svg+xml',
-];
-
-const CROPPING_SUPPORTED_TYPES = [
-	'image/jpeg',
-	'image/png',
-	'image/webp',
-];
-
-const IMAGE_EDITING_SUPPORTED_TYPES = [
-	'image/jpeg',
-	'image/png',
-	'image/webp',
-];
-
-const WATERMARK_SUPPORTED_TYPES = IMAGE_EDITING_SUPPORTED_TYPES;
-
-const mimeTypeMap = {
-	'image/webp': 'webp',
-	'image/jpeg': 'jpg',
-	'image/png': 'png',
-} as const;
-
 const props = withDefaults(defineProps<{
 	files: File[];
 	folderId?: string | null;
 	multiple?: boolean;
-	features?: UploaderDialogFeatures;
+	features?: UploaderFeatures;
 }>(), {
 	multiple: true,
 });
 
-const uploaderFeatures = computed<Required<UploaderDialogFeatures>>(() => {
-	return {
-		effect: props.features?.effect ?? true,
-		watermark: props.features?.watermark ?? true,
-		crop: props.features?.crop ?? true,
-	};
-});
-
 const emit = defineEmits<{
 	(ev: 'done', driveFiles: Misskey.entities.DriveFile[]): void;
 	(ev: 'canceled'): void;
 	(ev: 'closed'): void;
 }>();
 
-type UploaderItem = {
-	id: string;
-	name: string;
-	uploadName?: string;
-	progress: { max: number; value: number } | null;
-	thumbnail: string;
-	preprocessing: boolean;
-	uploading: boolean;
-	uploaded: Misskey.entities.DriveFile | null;
-	uploadFailed: boolean;
-	aborted: boolean;
-	compressionLevel: 0 | 1 | 2 | 3;
-	compressedSize?: number | null;
-	preprocessedFile?: Blob | null;
-	file: File;
-	watermarkPresetId: string | null;
-	abort?: (() => void) | null;
-};
+const dialog = useTemplateRef('dialog');
+
+const uploader = useUploader({
+	multiple: props.multiple,
+	folderId: props.folderId,
+	features: props.features,
+});
 
-const items = ref<UploaderItem[]>([]);
+onMounted(() => {
+	uploader.addFiles(props.files);
+});
 
-const dialog = useTemplateRef('dialog');
+const items = uploader.items;
 
 const firstUploadAttempted = ref(false);
-const isUploading = computed(() => items.value.some(item => item.uploading));
-const canRetry = computed(() => firstUploadAttempted.value && !items.value.some(item => item.uploading || item.preprocessing) && items.value.some(item => item.uploaded == null));
+const canRetry = computed(() => firstUploadAttempted.value && uploader.readyForUpload.value);
 const canDone = computed(() => items.value.some(item => item.uploaded != null));
 const overallProgress = computed(() => {
 	const max = items.value.length;
@@ -195,27 +106,6 @@ const overallProgress = computed(() => {
 	return Math.round((v / max) * 100);
 });
 
-function getCompressionSettings(level: 0 | 1 | 2 | 3) {
-	if (level === 1) {
-		return {
-			maxWidth: 2000,
-			maxHeight: 2000,
-		};
-	} else if (level === 2) {
-		return {
-			maxWidth: 2000 * 0.75, // =1500
-			maxHeight: 2000 * 0.75, // =1500
-		};
-	} else if (level === 3) {
-		return {
-			maxWidth: 2000 * 0.75 * 0.75, // =1125
-			maxHeight: 2000 * 0.75 * 0.75, // =1125
-		};
-	} else {
-		return null;
-	}
-}
-
 watch(items, () => {
 	if (items.value.length === 0) {
 		emit('canceled');
@@ -238,11 +128,16 @@ async function cancel() {
 	});
 	if (canceled) return;
 
-	abortAll();
+	uploader.abortAll();
 	emit('canceled');
 	dialog.value?.close();
 }
 
+function upload() {
+	firstUploadAttempted.value = true;
+	uploader.upload();
+}
+
 async function abortWithConfirm() {
 	const { canceled } = await os.confirm({
 		type: 'question',
@@ -252,11 +147,11 @@ async function abortWithConfirm() {
 	});
 	if (canceled) return;
 
-	abortAll();
+	uploader.abortAll();
 }
 
 async function done() {
-	if (items.value.some(item => item.uploaded == null)) {
+	if (!uploader.allItemsUploaded.value) {
 		const { canceled } = await os.confirm({
 			type: 'question',
 			text: i18n.ts._uploader.doneConfirm,
@@ -270,396 +165,20 @@ async function done() {
 	dialog.value?.close();
 }
 
-function showMenu(ev: MouseEvent, item: UploaderItem) {
-	const menu: MenuItem[] = [];
-
-	menu.push({
-		icon: 'ti ti-cursor-text',
-		text: i18n.ts.rename,
-		action: async () => {
-			const { result, canceled } = await os.inputText({
-				type: 'text',
-				title: i18n.ts.rename,
-				placeholder: item.name,
-				default: item.name,
-			});
-			if (canceled) return;
-			if (result.trim() === '') return;
-
-			item.name = result;
-		},
-	});
-
-	if (
-		uploaderFeatures.value.crop &&
-		CROPPING_SUPPORTED_TYPES.includes(item.file.type) &&
-		!item.preprocessing &&
-		!item.uploading &&
-		!item.uploaded
-	) {
-		menu.push({
-			icon: 'ti ti-crop',
-			text: i18n.ts.cropImage,
-			action: async () => {
-				const cropped = await os.cropImageFile(item.file, { aspectRatio: null });
-				URL.revokeObjectURL(item.thumbnail);
-				const newItem = {
-					...item,
-					file: markRaw(cropped),
-					thumbnail: window.URL.createObjectURL(cropped),
-				};
-				items.value.splice(items.value.indexOf(item), 1, newItem);
-				preprocess(newItem).then(() => {
-					triggerRef(items);
-				});
-			},
-		});
-	}
-
-	if (
-		uploaderFeatures.value.effect &&
-		IMAGE_EDITING_SUPPORTED_TYPES.includes(item.file.type) &&
-		!item.preprocessing &&
-		!item.uploading &&
-		!item.uploaded
-	) {
-		menu.push({
-			icon: 'ti ti-sparkles',
-			text: i18n.ts._imageEffector.title + ' (BETA)',
-			action: async () => {
-				const { dispose } = await os.popupAsyncWithDialog(import('@/components/MkImageEffectorDialog.vue').then(x => x.default), {
-					image: item.file,
-				}, {
-					ok: (file) => {
-						URL.revokeObjectURL(item.thumbnail);
-						const newItem = {
-							...item,
-							file: markRaw(file),
-							thumbnail: window.URL.createObjectURL(file),
-						};
-						items.value.splice(items.value.indexOf(item), 1, newItem);
-						preprocess(newItem).then(() => {
-							triggerRef(items);
-						});
-					},
-					closed: () => dispose(),
-				});
-			},
-		});
-	}
-
-	if (
-		uploaderFeatures.value.watermark &&
-		WATERMARK_SUPPORTED_TYPES.includes(item.file.type) &&
-		!item.preprocessing &&
-		!item.uploading &&
-		!item.uploaded
-	) {
-		function changeWatermarkPreset(presetId: string | null) {
-			item.watermarkPresetId = presetId;
-			preprocess(item).then(() => {
-				triggerRef(items);
-			});
-		}
-
-		menu.push({
-			icon: 'ti ti-copyright',
-			text: i18n.ts.watermark,
-			caption: computed(() => item.watermarkPresetId == null ? null : prefer.s.watermarkPresets.find(p => p.id === item.watermarkPresetId)?.name),
-			type: 'parent',
-			children: [{
-				type: 'radioOption',
-				text: i18n.ts.none,
-				active: computed(() => item.watermarkPresetId == null),
-				action: () => changeWatermarkPreset(null),
-			}, {
-				type: 'divider',
-			}, ...prefer.s.watermarkPresets.map(preset => ({
-				type: 'radioOption' as const,
-				text: preset.name,
-				active: computed(() => item.watermarkPresetId === preset.id),
-				action: () => changeWatermarkPreset(preset.id),
-			})), ...(prefer.s.watermarkPresets.length > 0 ? [{
-				type: 'divider' as const,
-			}] : []), {
-				type: 'button',
-				icon: 'ti ti-plus',
-				text: i18n.ts.add,
-				action: async () => {
-					const { dispose } = await os.popupAsyncWithDialog(import('@/components/MkWatermarkEditorDialog.vue').then(x => x.default), {
-						image: item.file,
-					}, {
-						ok: (preset) => {
-							prefer.commit('watermarkPresets', [...prefer.s.watermarkPresets, preset]);
-							changeWatermarkPreset(preset.id);
-						},
-						closed: () => dispose(),
-					});
-				},
-			}],
-		});
-	}
-
-	if (COMPRESSION_SUPPORTED_TYPES.includes(item.file.type) && !item.preprocessing && !item.uploading && !item.uploaded) {
-		function changeCompressionLevel(level: 0 | 1 | 2 | 3) {
-			item.compressionLevel = level;
-			preprocess(item).then(() => {
-				triggerRef(items);
-			});
-		}
-
-		menu.push({
-			icon: 'ti ti-leaf',
-			text: computed(() => {
-				let text = i18n.ts.compress;
-
-				if (item.compressionLevel === 0 || item.compressionLevel == null) {
-					text += `: ${i18n.ts.none}`;
-				} else if (item.compressionLevel === 1) {
-					text += `: ${i18n.ts.low}`;
-				} else if (item.compressionLevel === 2) {
-					text += `: ${i18n.ts.medium}`;
-				} else if (item.compressionLevel === 3) {
-					text += `: ${i18n.ts.high}`;
-				}
-
-				return text;
-			}),
-			type: 'parent',
-			children: [{
-				type: 'radioOption',
-				text: i18n.ts.none,
-				active: computed(() => item.compressionLevel === 0 || item.compressionLevel == null),
-				action: () => changeCompressionLevel(0),
-			}, {
-				type: 'divider',
-			}, {
-				type: 'radioOption',
-				text: i18n.ts.low,
-				active: computed(() => item.compressionLevel === 1),
-				action: () => changeCompressionLevel(1),
-			}, {
-				type: 'radioOption',
-				text: i18n.ts.medium,
-				active: computed(() => item.compressionLevel === 2),
-				action: () => changeCompressionLevel(2),
-			}, {
-				type: 'radioOption',
-				text: i18n.ts.high,
-				active: computed(() => item.compressionLevel === 3),
-				action: () => changeCompressionLevel(3),
-			}],
-		});
-	}
-
-	if (!item.preprocessing && !item.uploading && !item.uploaded) {
-		menu.push({
-			type: 'divider',
-		}, {
-			icon: 'ti ti-x',
-			text: i18n.ts.remove,
-			action: () => {
-				URL.revokeObjectURL(item.thumbnail);
-				items.value.splice(items.value.indexOf(item), 1);
-			},
-		});
-	} else if (item.uploading) {
-		menu.push({
-			type: 'divider',
-		}, {
-			icon: 'ti ti-cloud-pause',
-			text: i18n.ts.abort,
-			danger: true,
-			action: () => {
-				if (item.abort != null) {
-					item.abort();
-				}
-			},
-		});
-	}
-
-	os.popupMenu(menu, ev.currentTarget ?? ev.target);
-}
-
-async function upload() { // エラーハンドリングなどを考慮してシーケンシャルにやる
-	firstUploadAttempted.value = true;
-
-	items.value = items.value.map(item => ({
-		...item,
-		aborted: false,
-		uploadFailed: false,
-		uploading: false,
-	}));
-
-	for (const item of items.value.filter(item => item.uploaded == null)) {
-		// アップロード処理途中で値が変わる場合（途中で全キャンセルされたりなど）もあるので、Array filterではなくここでチェック
-		if (item.aborted) {
-			continue;
-		}
-
-		item.uploadFailed = false;
-		item.uploading = true;
-
-		const { filePromise, abort } = uploadFile(item.preprocessedFile ?? item.file, {
-			name: item.uploadName ?? item.name,
-			folderId: props.folderId,
-			onProgress: (progress) => {
-				if (item.progress == null) {
-					item.progress = { max: progress.total, value: progress.loaded };
-				} else {
-					item.progress.value = progress.loaded;
-					item.progress.max = progress.total;
-				}
-			},
-		});
-
-		item.abort = () => {
-			item.abort = null;
-			abort();
-			item.uploading = false;
-			item.uploadFailed = true;
-		};
-
-		await filePromise.then((file) => {
-			item.uploaded = file;
-			item.abort = null;
-		}).catch(err => {
-			item.uploadFailed = true;
-			item.progress = null;
-			if (!(err instanceof UploadAbortedError)) {
-				throw err;
-			}
-		}).finally(() => {
-			item.uploading = false;
-		});
-	}
-}
-
-function abortAll() {
-	for (const item of items.value) {
-		if (item.uploaded != null) {
-			continue;
-		}
-
-		if (item.abort != null) {
-			item.abort();
-		}
-		item.aborted = true;
-		item.uploadFailed = true;
-	}
-}
-
 async function chooseFile(ev: MouseEvent) {
 	const newFiles = await os.chooseFileFromPc({ multiple: true });
-
-	for (const file of newFiles) {
-		initializeFile(file);
-	}
+	uploader.addFiles(newFiles);
 }
 
-async function preprocess(item: (typeof items)['value'][number]): Promise<void> {
-	item.preprocessing = true;
-
-	let file: Blob | File = item.file;
-	const imageBitmap = await window.createImageBitmap(file);
-
-	const needsWatermark = item.watermarkPresetId != null && WATERMARK_SUPPORTED_TYPES.includes(file.type);
-	const preset = prefer.s.watermarkPresets.find(p => p.id === item.watermarkPresetId);
-	if (needsWatermark && preset != null) {
-		const canvas = window.document.createElement('canvas');
-		const renderer = new WatermarkRenderer({
-			canvas: canvas,
-			renderWidth: imageBitmap.width,
-			renderHeight: imageBitmap.height,
-			image: imageBitmap,
-		});
-
-		await renderer.setLayers(preset.layers);
-
-		renderer.render();
-
-		file = await new Promise<Blob>((resolve) => {
-			canvas.toBlob((blob) => {
-				if (blob == null) {
-					throw new Error('Failed to convert canvas to blob');
-				}
-				resolve(blob);
-				renderer.destroy();
-			}, 'image/png');
-		});
-	}
-
-	const compressionSettings = getCompressionSettings(item.compressionLevel);
-	const needsCompress = item.compressionLevel !== 0 && compressionSettings && COMPRESSION_SUPPORTED_TYPES.includes(file.type) && !(await isAnimated(file));
-
-	if (needsCompress) {
-		const config = {
-			mimeType: isWebpSupported() ? 'image/webp' : 'image/jpeg',
-			maxWidth: compressionSettings.maxWidth,
-			maxHeight: compressionSettings.maxHeight,
-			quality: isWebpSupported() ? 0.85 : 0.8,
-		};
-
-		try {
-			const result = await readAndCompressImage(file, config);
-			if (result.size < file.size || file.type === 'image/webp') {
-				// The compression may not always reduce the file size
-				// (and WebP is not browser safe yet)
-				file = result;
-				item.compressedSize = result.size;
-				item.uploadName = file.type !== config.mimeType ? `${item.name}.${mimeTypeMap[config.mimeType]}` : item.name;
-			}
-		} catch (err) {
-			console.error('Failed to resize image', err);
-		}
-	} else {
-		item.compressedSize = null;
-		item.uploadName = item.name;
-	}
-
-	URL.revokeObjectURL(item.thumbnail);
-	item.thumbnail = window.URL.createObjectURL(file);
-	item.preprocessedFile = markRaw(file);
-	item.preprocessing = false;
-
-	imageBitmap.close();
+function showPerItemMenu(item: UploaderItem, ev: MouseEvent) {
+	const menu = uploader.getMenu(item);
+	os.popupMenu(menu, ev.currentTarget ?? ev.target);
 }
 
-function initializeFile(file: File) {
-	const id = genId();
-	const filename = file.name ?? 'untitled';
-	const extension = filename.split('.').length > 1 ? '.' + filename.split('.').pop() : '';
-	const item = {
-		id,
-		name: prefer.s.keepOriginalFilename ? filename : id + extension,
-		progress: null,
-		thumbnail: window.URL.createObjectURL(file),
-		preprocessing: false,
-		uploading: false,
-		aborted: false,
-		uploaded: null,
-		uploadFailed: false,
-		compressionLevel: prefer.s.defaultImageCompressionLevel,
-		watermarkPresetId: uploaderFeatures.value.watermark ? prefer.s.defaultWatermarkPresetId : null,
-		file: markRaw(file),
-	} satisfies UploaderItem;
-	items.value.push(item);
-	preprocess(item).then(() => {
-		triggerRef(items);
-	});
+function showPerItemMenuViaContextmenu(item: UploaderItem, ev: MouseEvent) {
+	const menu = uploader.getMenu(item);
+	os.contextMenu(menu, ev);
 }
-
-onMounted(() => {
-	for (const file of props.files) {
-		initializeFile(file);
-	}
-});
-
-onUnmounted(() => {
-	for (const item of items.value) {
-		URL.revokeObjectURL(item.thumbnail);
-	}
-});
 </script>
 
 <style lang="scss" module>
@@ -681,127 +200,4 @@ onUnmounted(() => {
 		background: var(--MI_THEME-warn);
 	}
 }
-
-.item {
-	position: relative;
-	border-radius: 10px;
-	overflow: clip;
-
-	&::before {
-		content: '';
-		display: block;
-		position: absolute;
-		top: 0;
-		left: 0;
-		width: var(--p);
-		height: 100%;
-		background: color(from var(--MI_THEME-accent) srgb r g b / 0.5);
-		transition: width 0.2s ease, left 0.2s ease;
-	}
-
-	&.itemWaiting {
-		&::after {
-			--c: color(from var(--MI_THEME-accent) srgb r g b / 0.25);
-
-			content: '';
-			display: block;
-			position: absolute;
-			top: 0;
-			left: 0;
-			width: 100%;
-			height: 100%;
-			background: linear-gradient(-45deg, transparent 25%, var(--c) 25%,var(--c) 50%, transparent 50%, transparent 75%, var(--c) 75%, var(--c));
-			background-size: 25px 25px;
-			animation: stripe .8s infinite linear;
-		}
-	}
-
-	&.itemCompleted {
-		&::before {
-			left: 100%;
-			width: var(--p);
-		}
-
-		.itemBody {
-			color: var(--MI_THEME-accent);
-		}
-	}
-
-	&.itemFailed {
-		.itemBody {
-			color: var(--MI_THEME-error);
-		}
-	}
-}
-
-@keyframes stripe {
-	0% { background-position-x: 0; }
-	100% { background-position-x: -25px; }
-}
-
-.itemInner {
-	position: relative;
-	z-index: 1;
-	padding: 8px 16px;
-	display: flex;
-	align-items: center;
-	gap: 12px;
-}
-
-.itemThumbnail {
-	width: 70px;
-	height: 70px;
-	background-color: var(--MI_THEME-bg);
-	background-size: contain;
-	background-position: center;
-	background-repeat: no-repeat;
-	border-radius: 6px;
-}
-
-.itemBody {
-	flex: 1;
-	min-width: 0;
-}
-
-.itemInfo {
-	opacity: 0.7;
-	margin-top: 4px;
-	font-size: 90%;
-	display: flex;
-	gap: 8px;
-}
-
-.itemIcon {
-	width: 35px;
-}
-
-@container (max-width: 500px) {
-	.itemInner {
-		flex-direction: column;
-		gap: 8px;
-	}
-
-	.itemBody {
-		font-size: 90%;
-		text-align: center;
-		width: 100%;
-		min-width: 0;
-	}
-
-	.itemActionWrapper {
-		position: absolute;
-		top: 8px;
-		left: 8px;
-	}
-
-	.itemInfo {
-		justify-content: center;
-	}
-
-	.itemIconWrapper {
-		position: absolute;
-		top: 8px;
-		right: 8px;
-	}
-}
 </style>
diff --git a/packages/frontend/src/components/MkUploaderItems.vue b/packages/frontend/src/components/MkUploaderItems.vue
new file mode 100644
index 0000000000..2d624cf344
--- /dev/null
+++ b/packages/frontend/src/components/MkUploaderItems.vue
@@ -0,0 +1,196 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div :class="$style.root" class="_gaps_s">
+	<div
+		v-for="item in props.items"
+		:key="item.id"
+		v-panel
+		:class="[$style.item, { [$style.itemWaiting]: item.preprocessing, [$style.itemCompleted]: item.uploaded, [$style.itemFailed]: item.uploadFailed }]"
+		:style="{ '--p': item.progress != null ? `${item.progress.value / item.progress.max * 100}%` : '0%' }"
+		@contextmenu.prevent.stop="onContextmenu(item, $event)"
+	>
+		<div :class="$style.itemInner">
+			<div :class="$style.itemActionWrapper">
+				<MkButton :iconOnly="true" rounded @click="emit('showMenu', item, $event)"><i class="ti ti-dots"></i></MkButton>
+			</div>
+			<div :class="$style.itemThumbnail" :style="{ backgroundImage: `url(${ item.thumbnail })` }" @click="onThumbnailClick(item, $event)"></div>
+			<div :class="$style.itemBody">
+				<div><MkCondensedLine :minScale="2 / 3">{{ item.name }}</MkCondensedLine></div>
+				<div :class="$style.itemInfo">
+					<span>{{ item.file.type }}</span>
+					<span v-if="item.compressedSize">({{ i18n.tsx._uploader.compressedToX({ x: bytes(item.compressedSize) }) }} = {{ i18n.tsx._uploader.savedXPercent({ x: Math.round((1 - item.compressedSize / item.file.size) * 100) }) }})</span>
+					<span v-else>{{ bytes(item.file.size) }}</span>
+				</div>
+				<div>
+				</div>
+			</div>
+			<div :class="$style.itemIconWrapper">
+				<MkSystemIcon v-if="item.uploading" :class="$style.itemIcon" type="waiting"/>
+				<MkSystemIcon v-else-if="item.uploaded" :class="$style.itemIcon" type="success"/>
+				<MkSystemIcon v-else-if="item.uploadFailed" :class="$style.itemIcon" type="error"/>
+			</div>
+		</div>
+	</div>
+</div>
+</template>
+
+<script lang="ts" setup>
+import { isLink } from '@@/js/is-link.js';
+import type { UploaderItem } from '@/composables/use-uploader.js';
+import { i18n } from '@/i18n.js';
+import MkButton from '@/components/MkButton.vue';
+import bytes from '@/filters/bytes.js';
+
+const props = defineProps<{
+	items: UploaderItem[];
+}>();
+
+const emit = defineEmits<{
+	(ev: 'showMenu', item: UploaderItem, event: MouseEvent): void;
+	(ev: 'showMenuViaContextmenu', item: UploaderItem, event: MouseEvent): void;
+}>();
+
+function onContextmenu(item: UploaderItem, ev: MouseEvent) {
+	if (ev.target && isLink(ev.target as HTMLElement)) return;
+	if (window.getSelection()?.toString() !== '') return;
+
+	emit('showMenuViaContextmenu', item, ev);
+}
+
+function onThumbnailClick(item: UploaderItem, ev: MouseEvent) {
+	// TODO: preview when item is image
+}
+</script>
+
+<style lang="scss" module>
+.root {
+	position: relative;
+}
+
+.item {
+	position: relative;
+	border-radius: 10px;
+	overflow: clip;
+
+	&::before {
+		content: '';
+		display: block;
+		position: absolute;
+		top: 0;
+		left: 0;
+		width: var(--p);
+		height: 100%;
+		background: color(from var(--MI_THEME-accent) srgb r g b / 0.5);
+		transition: width 0.2s ease, left 0.2s ease;
+	}
+
+	&.itemWaiting {
+		&::after {
+			--c: color(from var(--MI_THEME-accent) srgb r g b / 0.25);
+
+			content: '';
+			display: block;
+			position: absolute;
+			top: 0;
+			left: 0;
+			width: 100%;
+			height: 100%;
+			background: linear-gradient(-45deg, transparent 25%, var(--c) 25%,var(--c) 50%, transparent 50%, transparent 75%, var(--c) 75%, var(--c));
+			background-size: 25px 25px;
+			animation: stripe .8s infinite linear;
+		}
+	}
+
+	&.itemCompleted {
+		&::before {
+			left: 100%;
+			width: var(--p);
+		}
+
+		.itemBody {
+			color: var(--MI_THEME-accent);
+		}
+	}
+
+	&.itemFailed {
+		.itemBody {
+			color: var(--MI_THEME-error);
+		}
+	}
+}
+
+@keyframes stripe {
+	0% { background-position-x: 0; }
+	100% { background-position-x: -25px; }
+}
+
+.itemInner {
+	position: relative;
+	z-index: 1;
+	padding: 8px 16px;
+	display: flex;
+	align-items: center;
+	gap: 12px;
+}
+
+.itemThumbnail {
+	width: 70px;
+	height: 70px;
+	background-color: var(--MI_THEME-bg);
+	background-size: contain;
+	background-position: center;
+	background-repeat: no-repeat;
+	border-radius: 6px;
+}
+
+.itemBody {
+	flex: 1;
+	min-width: 0;
+}
+
+.itemInfo {
+	opacity: 0.7;
+	margin-top: 4px;
+	font-size: 90%;
+	display: flex;
+	gap: 8px;
+}
+
+.itemIcon {
+	width: 35px;
+}
+
+@container (max-width: 500px) {
+	.itemInner {
+		flex-direction: column;
+		gap: 8px;
+	}
+
+	.itemBody {
+		font-size: 90%;
+		text-align: center;
+		width: 100%;
+		min-width: 0;
+	}
+
+	.itemActionWrapper {
+		position: absolute;
+		top: 8px;
+		left: 8px;
+	}
+
+	.itemInfo {
+		justify-content: center;
+	}
+
+	.itemIconWrapper {
+		position: absolute;
+		top: 8px;
+		right: 8px;
+	}
+}
+</style>
diff --git a/packages/frontend/src/composables/use-uploader.ts b/packages/frontend/src/composables/use-uploader.ts
new file mode 100644
index 0000000000..3f105dc201
--- /dev/null
+++ b/packages/frontend/src/composables/use-uploader.ts
@@ -0,0 +1,535 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import * as Misskey from 'misskey-js';
+import { readAndCompressImage } from '@misskey-dev/browser-image-resizer';
+import isAnimated from 'is-file-animated';
+import { EventEmitter } from 'eventemitter3';
+import { computed, markRaw, onMounted, onUnmounted, ref, triggerRef } from 'vue';
+import type { MenuItem } from '@/types/menu.js';
+import { genId } from '@/utility/id.js';
+import { i18n } from '@/i18n.js';
+import { prefer } from '@/preferences.js';
+import { isWebpSupported } from '@/utility/isWebpSupported.js';
+import { uploadFile, UploadAbortedError } from '@/utility/drive.js';
+import * as os from '@/os.js';
+import { ensureSignin } from '@/i.js';
+import { WatermarkRenderer } from '@/utility/watermark.js';
+
+export type UploaderFeatures = {
+	effect?: boolean;
+	watermark?: boolean;
+	crop?: boolean;
+};
+
+const COMPRESSION_SUPPORTED_TYPES = [
+	'image/jpeg',
+	'image/png',
+	'image/webp',
+	'image/svg+xml',
+];
+
+const CROPPING_SUPPORTED_TYPES = [
+	'image/jpeg',
+	'image/png',
+	'image/webp',
+];
+
+const IMAGE_EDITING_SUPPORTED_TYPES = [
+	'image/jpeg',
+	'image/png',
+	'image/webp',
+];
+
+const WATERMARK_SUPPORTED_TYPES = IMAGE_EDITING_SUPPORTED_TYPES;
+
+const mimeTypeMap = {
+	'image/webp': 'webp',
+	'image/jpeg': 'jpg',
+	'image/png': 'png',
+} as const;
+
+export type UploaderItem = {
+	id: string;
+	name: string;
+	uploadName?: string;
+	progress: { max: number; value: number } | null;
+	thumbnail: string;
+	preprocessing: boolean;
+	uploading: boolean;
+	uploaded: Misskey.entities.DriveFile | null;
+	uploadFailed: boolean;
+	aborted: boolean;
+	compressionLevel: 0 | 1 | 2 | 3;
+	compressedSize?: number | null;
+	preprocessedFile?: Blob | null;
+	file: File;
+	watermarkPresetId: string | null;
+	abort?: (() => void) | null;
+};
+
+function getCompressionSettings(level: 0 | 1 | 2 | 3) {
+	if (level === 1) {
+		return {
+			maxWidth: 2000,
+			maxHeight: 2000,
+		};
+	} else if (level === 2) {
+		return {
+			maxWidth: 2000 * 0.75, // =1500
+			maxHeight: 2000 * 0.75, // =1500
+		};
+	} else if (level === 3) {
+		return {
+			maxWidth: 2000 * 0.75 * 0.75, // =1125
+			maxHeight: 2000 * 0.75 * 0.75, // =1125
+		};
+	} else {
+		return null;
+	}
+}
+
+export function useUploader(options: {
+	folderId?: string | null;
+	multiple?: boolean;
+	features?: UploaderFeatures;
+} = {}) {
+	const $i = ensureSignin();
+
+	const events = new EventEmitter<{
+		'itemUploaded': (ctx: { item: UploaderItem; }) => void;
+	}>();
+
+	const uploaderFeatures = computed<Required<UploaderFeatures>>(() => {
+		return {
+			effect: options.features?.effect ?? true,
+			watermark: options.features?.watermark ?? true,
+			crop: options.features?.crop ?? true,
+		};
+	});
+
+	const items = ref<UploaderItem[]>([]);
+
+	function initializeFile(file: File) {
+		const id = genId();
+		const filename = file.name ?? 'untitled';
+		const extension = filename.split('.').length > 1 ? '.' + filename.split('.').pop() : '';
+		items.value.push({
+			id,
+			name: prefer.s.keepOriginalFilename ? filename : id + extension,
+			progress: null,
+			thumbnail: window.URL.createObjectURL(file),
+			preprocessing: false,
+			uploading: false,
+			aborted: false,
+			uploaded: null,
+			uploadFailed: false,
+			compressionLevel: prefer.s.defaultImageCompressionLevel,
+			watermarkPresetId: uploaderFeatures.value.watermark ? prefer.s.defaultWatermarkPresetId : null,
+			file: markRaw(file),
+		});
+		const reactiveItem = items.value.at(-1)!;
+		preprocess(reactiveItem).then(() => {
+			triggerRef(items);
+		});
+	}
+
+	function addFiles(newFiles: File[]) {
+		for (const file of newFiles) {
+			initializeFile(file);
+		}
+	}
+
+	function removeItem(item: UploaderItem) {
+		URL.revokeObjectURL(item.thumbnail);
+		items.value.splice(items.value.indexOf(item), 1);
+	}
+
+	function getMenu(item: UploaderItem): MenuItem[] {
+		const menu: MenuItem[] = [];
+
+		if (
+			!item.preprocessing &&
+			!item.uploading &&
+			!item.uploaded
+		) {
+			menu.push({
+				icon: 'ti ti-cursor-text',
+				text: i18n.ts.rename,
+				action: async () => {
+					const { result, canceled } = await os.inputText({
+						type: 'text',
+						title: i18n.ts.rename,
+						placeholder: item.name,
+						default: item.name,
+					});
+					if (canceled) return;
+					if (result.trim() === '') return;
+
+					item.name = result;
+				},
+			});
+		}
+
+		if (
+			uploaderFeatures.value.crop &&
+			CROPPING_SUPPORTED_TYPES.includes(item.file.type) &&
+			!item.preprocessing &&
+			!item.uploading &&
+			!item.uploaded
+		) {
+			menu.push({
+				icon: 'ti ti-crop',
+				text: i18n.ts.cropImage,
+				action: async () => {
+					const cropped = await os.cropImageFile(item.file, { aspectRatio: null });
+					URL.revokeObjectURL(item.thumbnail);
+					items.value.splice(items.value.indexOf(item), 1, {
+						...item,
+						file: markRaw(cropped),
+						thumbnail: window.URL.createObjectURL(cropped),
+					});
+					const reactiveItem = items.value.find(x => x.id === item.id)!;
+					preprocess(reactiveItem).then(() => {
+						triggerRef(items);
+					});
+				},
+			});
+		}
+
+		if (
+			uploaderFeatures.value.effect &&
+			IMAGE_EDITING_SUPPORTED_TYPES.includes(item.file.type) &&
+			!item.preprocessing &&
+			!item.uploading &&
+			!item.uploaded
+		) {
+			menu.push({
+				icon: 'ti ti-sparkles',
+				text: i18n.ts._imageEffector.title + ' (BETA)',
+				action: async () => {
+					const { dispose } = await os.popupAsyncWithDialog(import('@/components/MkImageEffectorDialog.vue').then(x => x.default), {
+						image: item.file,
+					}, {
+						ok: (file) => {
+							URL.revokeObjectURL(item.thumbnail);
+							items.value.splice(items.value.indexOf(item), 1, {
+								...item,
+								file: markRaw(file),
+								thumbnail: window.URL.createObjectURL(file),
+							});
+							const reactiveItem = items.value.find(x => x.id === item.id)!;
+							preprocess(reactiveItem).then(() => {
+								triggerRef(items);
+							});
+						},
+						closed: () => dispose(),
+					});
+				},
+			});
+		}
+
+		if (
+			uploaderFeatures.value.watermark &&
+			WATERMARK_SUPPORTED_TYPES.includes(item.file.type) &&
+			!item.preprocessing &&
+			!item.uploading &&
+			!item.uploaded
+		) {
+			function changeWatermarkPreset(presetId: string | null) {
+				item.watermarkPresetId = presetId;
+				preprocess(item).then(() => {
+					triggerRef(items);
+				});
+			}
+
+			menu.push({
+				icon: 'ti ti-copyright',
+				text: i18n.ts.watermark,
+				caption: computed(() => item.watermarkPresetId == null ? null : prefer.s.watermarkPresets.find(p => p.id === item.watermarkPresetId)?.name),
+				type: 'parent',
+				children: [{
+					type: 'radioOption',
+					text: i18n.ts.none,
+					active: computed(() => item.watermarkPresetId == null),
+					action: () => changeWatermarkPreset(null),
+				}, {
+					type: 'divider',
+				}, ...prefer.s.watermarkPresets.map(preset => ({
+					type: 'radioOption' as const,
+					text: preset.name,
+					active: computed(() => item.watermarkPresetId === preset.id),
+					action: () => changeWatermarkPreset(preset.id),
+				})), ...(prefer.s.watermarkPresets.length > 0 ? [{
+					type: 'divider' as const,
+				}] : []), {
+					type: 'button',
+					icon: 'ti ti-plus',
+					text: i18n.ts.add,
+					action: async () => {
+						const { dispose } = await os.popupAsyncWithDialog(import('@/components/MkWatermarkEditorDialog.vue').then(x => x.default), {
+							image: item.file,
+						}, {
+							ok: (preset) => {
+								prefer.commit('watermarkPresets', [...prefer.s.watermarkPresets, preset]);
+								changeWatermarkPreset(preset.id);
+							},
+							closed: () => dispose(),
+						});
+					},
+				}],
+			});
+		}
+
+		if (
+			COMPRESSION_SUPPORTED_TYPES.includes(item.file.type) &&
+			!item.preprocessing &&
+			!item.uploading &&
+			!item.uploaded
+		) {
+			function changeCompressionLevel(level: 0 | 1 | 2 | 3) {
+				item.compressionLevel = level;
+				preprocess(item).then(() => {
+					triggerRef(items);
+				});
+			}
+
+			menu.push({
+				icon: 'ti ti-leaf',
+				text: computed(() => {
+					let text = i18n.ts.compress;
+
+					if (item.compressionLevel === 0 || item.compressionLevel == null) {
+						text += `: ${i18n.ts.none}`;
+					} else if (item.compressionLevel === 1) {
+						text += `: ${i18n.ts.low}`;
+					} else if (item.compressionLevel === 2) {
+						text += `: ${i18n.ts.medium}`;
+					} else if (item.compressionLevel === 3) {
+						text += `: ${i18n.ts.high}`;
+					}
+
+					return text;
+				}),
+				type: 'parent',
+				children: [{
+					type: 'radioOption',
+					text: i18n.ts.none,
+					active: computed(() => item.compressionLevel === 0 || item.compressionLevel == null),
+					action: () => changeCompressionLevel(0),
+				}, {
+					type: 'divider',
+				}, {
+					type: 'radioOption',
+					text: i18n.ts.low,
+					active: computed(() => item.compressionLevel === 1),
+					action: () => changeCompressionLevel(1),
+				}, {
+					type: 'radioOption',
+					text: i18n.ts.medium,
+					active: computed(() => item.compressionLevel === 2),
+					action: () => changeCompressionLevel(2),
+				}, {
+					type: 'radioOption',
+					text: i18n.ts.high,
+					active: computed(() => item.compressionLevel === 3),
+					action: () => changeCompressionLevel(3),
+				}],
+			});
+		}
+
+		if (!item.preprocessing && !item.uploading && !item.uploaded) {
+			menu.push({
+				type: 'divider',
+			}, {
+				icon: 'ti ti-upload',
+				text: i18n.ts.upload,
+				action: () => {
+					uploadOne(item);
+				},
+			}, {
+				icon: 'ti ti-x',
+				text: i18n.ts.remove,
+				action: () => {
+					removeItem(item);
+				},
+			});
+		} else if (item.uploading) {
+			menu.push({
+				type: 'divider',
+			}, {
+				icon: 'ti ti-cloud-pause',
+				text: i18n.ts.abort,
+				danger: true,
+				action: () => {
+					if (item.abort != null) {
+						item.abort();
+					}
+				},
+			});
+		}
+
+		return menu;
+	}
+
+	async function uploadOne(item: UploaderItem): Promise<void> {
+		item.uploadFailed = false;
+		item.uploading = true;
+
+		const { filePromise, abort } = uploadFile(item.preprocessedFile ?? item.file, {
+			name: item.uploadName ?? item.name,
+			folderId: options.folderId,
+			onProgress: (progress) => {
+				if (item.progress == null) {
+					item.progress = { max: progress.total, value: progress.loaded };
+				} else {
+					item.progress.value = progress.loaded;
+					item.progress.max = progress.total;
+				}
+			},
+		});
+
+		item.abort = () => {
+			item.abort = null;
+			abort();
+			item.uploading = false;
+			item.uploadFailed = true;
+		};
+
+		await filePromise.then((file) => {
+			item.uploaded = file;
+			item.abort = null;
+			events.emit('itemUploaded', { item });
+		}).catch(err => {
+			item.uploadFailed = true;
+			item.progress = null;
+			if (!(err instanceof UploadAbortedError)) {
+				throw err;
+			}
+		}).finally(() => {
+			item.uploading = false;
+		});
+	}
+
+	async function upload() { // エラーハンドリングなどを考慮してシーケンシャルにやる
+		items.value = items.value.map(item => ({
+			...item,
+			aborted: false,
+			uploadFailed: false,
+			uploading: false,
+		}));
+
+		for (const item of items.value.filter(item => item.uploaded == null)) {
+			// アップロード処理途中で値が変わる場合（途中で全キャンセルされたりなど）もあるので、Array filterではなくここでチェック
+			if (item.aborted) {
+				continue;
+			}
+
+			await uploadOne(item);
+		}
+	}
+
+	function abortAll() {
+		for (const item of items.value) {
+			if (item.uploaded != null) {
+				continue;
+			}
+
+			if (item.abort != null) {
+				item.abort();
+			}
+			item.aborted = true;
+			item.uploadFailed = true;
+		}
+	}
+
+	async function preprocess(item: UploaderItem): Promise<void> {
+		item.preprocessing = true;
+
+		let file: Blob | File = item.file;
+		const imageBitmap = await window.createImageBitmap(file);
+
+		const needsWatermark = item.watermarkPresetId != null && WATERMARK_SUPPORTED_TYPES.includes(file.type);
+		const preset = prefer.s.watermarkPresets.find(p => p.id === item.watermarkPresetId);
+		if (needsWatermark && preset != null) {
+			const canvas = window.document.createElement('canvas');
+			const renderer = new WatermarkRenderer({
+				canvas: canvas,
+				renderWidth: imageBitmap.width,
+				renderHeight: imageBitmap.height,
+				image: imageBitmap,
+			});
+
+			await renderer.setLayers(preset.layers);
+
+			renderer.render();
+
+			file = await new Promise<Blob>((resolve) => {
+				canvas.toBlob((blob) => {
+					if (blob == null) {
+						throw new Error('Failed to convert canvas to blob');
+					}
+					resolve(blob);
+					renderer.destroy();
+				}, 'image/png');
+			});
+		}
+
+		const compressionSettings = getCompressionSettings(item.compressionLevel);
+		const needsCompress = item.compressionLevel !== 0 && compressionSettings && COMPRESSION_SUPPORTED_TYPES.includes(file.type) && !(await isAnimated(file));
+
+		if (needsCompress) {
+			const config = {
+				mimeType: isWebpSupported() ? 'image/webp' : 'image/jpeg',
+				maxWidth: compressionSettings.maxWidth,
+				maxHeight: compressionSettings.maxHeight,
+				quality: isWebpSupported() ? 0.85 : 0.8,
+			};
+
+			try {
+				const result = await readAndCompressImage(file, config);
+				if (result.size < file.size || file.type === 'image/webp') {
+				// The compression may not always reduce the file size
+				// (and WebP is not browser safe yet)
+					file = result;
+					item.compressedSize = result.size;
+					item.uploadName = file.type !== config.mimeType ? `${item.name}.${mimeTypeMap[config.mimeType]}` : item.name;
+				}
+			} catch (err) {
+				console.error('Failed to resize image', err);
+			}
+		} else {
+			item.compressedSize = null;
+			item.uploadName = item.name;
+		}
+
+		URL.revokeObjectURL(item.thumbnail);
+		item.thumbnail = window.URL.createObjectURL(file);
+		item.preprocessedFile = markRaw(file);
+		item.preprocessing = false;
+
+		imageBitmap.close();
+	}
+
+	onUnmounted(() => {
+		for (const item of items.value) {
+			URL.revokeObjectURL(item.thumbnail);
+		}
+	});
+
+	return {
+		items,
+		addFiles,
+		removeItem,
+		abortAll,
+		upload,
+		getMenu,
+		uploading: computed(() => items.value.some(item => item.uploading)),
+		readyForUpload: computed(() => items.value.length > 0 && items.value.some(item => item.uploaded == null) && !items.value.some(item => item.uploading || item.preprocessing)),
+		allItemsUploaded: computed(() => items.value.every(item => item.uploaded != null)),
+		events,
+	};
+}
+
diff --git a/packages/frontend/src/tips.ts b/packages/frontend/src/tips.ts
index a6850d0406..7218f4c19a 100644
--- a/packages/frontend/src/tips.ts
+++ b/packages/frontend/src/tips.ts
@@ -8,6 +8,7 @@ import { store } from '@/store.js';
 export const TIPS = [
 	'drive',
 	'uploader',
+	'postFormUploader',
 	'clips',
 	'userLists',
 	'tl.home',