feat: adds drag, drop and pasting of attachments

src/components/Composer.vue

@@ -3,7 +3,12 @@
   - SPDX-License-Identifier: AGPL-3.0-or-later
 -->
 <template>
-	<div class="message-composer">
+	<div
+		class="message-composer"
+		@dragover.prevent
+		@drop="onDrop"
+		@paste="onPaste"
+	>
 		<NcReferencePickerModal
 			v-if="isPickerAvailable && isPickerOpen"
 			id="reference-picker"
@@ -1739,6 +1744,42 @@
 			return option.email
 		},
 
+		onDrop(event) {
+			event.preventDefault()
+
+			const files = Array.from(event.dataTransfer.files)
+
+			if (!files.length) {
+				return
+			}
+
+			this.bus.emit('on-add-local-files', files)
+			this.saveDraftDebounced()
+		},
+
+		onPaste(event) {
+			const files = []
+
+			for (const item of event.clipboardData.items) {
+				if (item.kind === 'file') {
+					const file = item.getAsFile()
+
+					if (file) {
+						files.push(file)
+					}
+				}
+			}
+
+			if (!files.length) {
+				return
+			}
+
+			event.preventDefault()
+
+			this.bus.emit('on-add-local-files', files)
+			this.saveDraftDebounced()
+		}
+
 	},
 }
 </script>

src/components/ComposerAttachments.vue

@@ -190,6 +190,7 @@
 		this.bus.on('on-add-cloud-attachment', this.openAttachementPicker)
 		this.bus.on('on-add-cloud-attachment-link', this.OpenLinkPicker)
 		this.bus.on('on-add-message-as-attachment', this.onAddMessageAsAttachment)
+		this.bus.on('on-add-local-files', this.addLocalFiles)
 		this.value.map((attachment) => {
 			this.attachments.push({
 				id: attachment.id,
@@ -240,11 +241,15 @@
 		},
 
 		onLocalAttachmentSelected(e) {
+			return this.addLocalFiles(Array.from(e.target.files))
+		},
+
+		addLocalFiles(files) {
 			this.uploading = true
 			// BUG - if choose again - progress lost/ move to complete()
 			Vue.set(this, 'uploads', {})
 
-			const toUpload = sumBy(prop('size'), Object.values(e.target.files))
+			const toUpload = sumBy(prop('size'), Object.values(files))
 			const newTotal = toUpload + this.totalSizeOfUpload()
 			logger.debug('checking upload size limit', {
 				existingUploads: this.totalSizeOfUpload(),
@@ -253,7 +258,7 @@
 				newTotal,
 			})
 			if (this.uploadSizeLimit && newTotal > this.uploadSizeLimit) {
-				this.showAttachmentFileSizeWarning(e.target.files.length)
+				this.showAttachmentFileSizeWarning(files.length)
 				this.uploading = false
 				return
 			}
@@ -318,7 +323,7 @@
 				} catch (error) {
 					logger.error('Could not upload file', { file, error })
 				}
-			}, e.target.files)
+			}, files)
 
 			const done = Promise.all(promises)
 				.catch((error) => logger.error('could not upload all attachments', { error }))
@@ -329,6 +334,8 @@
 			return done
 		},
 
+
+
 		async onAddCloudAttachment(nodes) {
 			try {
 				const paths = nodes.map((node) => node.path)