From 566ff99e6c524170955da6e6534dce840f243c81 Mon Sep 17 00:00:00 2001
From: kolaente <k@knt.li>
Date: Thu, 27 Nov 2025 18:49:38 +0100
Subject: [PATCH] fix(editor): prevent upload overlay from intercepting text
 drag operations (#1890)

---
 .../components/tasks/partials/Attachments.vue |  95 +++++++++--
 frontend/src/composables/useDropzone.ts       | 157 ------------------
 2 files changed, 81 insertions(+), 171 deletions(-)
 delete mode 100644 frontend/src/composables/useDropzone.ts

diff --git a/frontend/src/components/tasks/partials/Attachments.vue b/frontend/src/components/tasks/partials/Attachments.vue
index 34397da6d..6b5f54bd7 100644
--- a/frontend/src/components/tasks/partials/Attachments.vue
+++ b/frontend/src/components/tasks/partials/Attachments.vue
@@ -126,7 +126,7 @@
 		<Teleport to="body">
 			<div
 				v-if="editEnabled"
-				:class="{hidden: !isOverDropZone}"
+				:class="{hidden: !showDropzone}"
 				class="dropzone"
 			>
 				<div class="drop-hint">
@@ -172,8 +172,8 @@
 </template>
 
 <script setup lang="ts">
-import {ref, shallowReactive, computed} from 'vue'
-import {useDropZone} from '@/composables/useDropzone'
+import {ref, shallowReactive, computed, watch} from 'vue'
+import {useDropZone} from '@vueuse/core'
 
 import User from '@/components/misc/User.vue'
 import ProgressBar from '@/components/misc/ProgressBar.vue'
@@ -205,6 +205,28 @@ const props = withDefaults(defineProps<{
 const emit = defineEmits<{
 	'taskChanged': [ITask],
 }>()
+
+const EDITOR_SELECTOR = '.tiptap, .tiptap__editor, [contenteditable]'
+
+function eventTargetsEditor(event: Event | null | undefined): boolean {
+	if (!event) {
+		return false
+	}
+
+	const target = event.target
+	if (target instanceof HTMLElement && target.closest(EDITOR_SELECTOR)) {
+		return true
+	}
+
+	if (typeof event.composedPath === 'function') {
+		return event.composedPath().some(element =>
+			element instanceof HTMLElement && element.matches(EDITOR_SELECTOR),
+		)
+	}
+
+	return false
+}
+
 const taskStore = useTaskStore()
 const {t} = useI18n({useScope: 'global'})
 
@@ -215,22 +237,67 @@ const attachments = computed(() => attachmentStore.attachments)
 
 const loading = computed(() => attachmentService.loading || taskStore.isLoading)
 
-function onDrop(files: File[] | null) {
-	if (files && files.length !== 0) {
-		uploadFilesToTask(files)
-	}
+const isDraggingFiles = ref(false)
+const isDragOverEditor = ref(false)
+
+function resetDragState() {
+	isDraggingFiles.value = false
+	isDragOverEditor.value = false
 }
 
 const {isOverDropZone} = useDropZone(document, {
-	onDrop,
-	checkValidity: items => {
-		for (const item of items) {
-			if (item.kind === 'file') {
-				return true
-			}
+	onEnter(files, event) {
+		if (!props.editEnabled) {
+			return
 		}
-		return false
+		
+		isDraggingFiles.value = true
+		isDragOverEditor.value = eventTargetsEditor(event)
 	},
+	onOver(files, event) {
+		if (!props.editEnabled) {
+			return
+		}
+
+		isDragOverEditor.value = eventTargetsEditor(event)
+	},
+	onLeave(files, event) {
+		if (!props.editEnabled) {
+			return
+		}
+
+		if (!isOverDropZone.value) {
+			resetDragState()
+			return
+		}
+
+		isDragOverEditor.value = eventTargetsEditor(event)
+	},
+	onDrop(files, event) {
+		if (!props.editEnabled) {
+			return
+		}
+
+		const dropOverEditor = eventTargetsEditor(event)
+		resetDragState()
+
+		// Ignore drops over editor - let TipTap handle them
+		if (dropOverEditor || !files || files.length === 0) {
+			return
+		}
+
+		uploadFilesToTask(files)
+	},
+})
+
+const showDropzone = computed(() =>
+	props.editEnabled && isDraggingFiles.value && !isDragOverEditor.value,
+)
+
+watch(() => props.editEnabled, enabled => {
+	if (!enabled) {
+		resetDragState()
+	}
 })
 
 function downloadAttachment(attachment: IAttachment) {
diff --git a/frontend/src/composables/useDropzone.ts b/frontend/src/composables/useDropzone.ts
deleted file mode 100644
index f1b6a898d..000000000
--- a/frontend/src/composables/useDropzone.ts
+++ /dev/null
@@ -1,157 +0,0 @@
-import type { MaybeRef, MaybeRefOrGetter, ShallowRef } from 'vue'
-import { isClient } from '@vueuse/shared'
-import { shallowRef, unref } from 'vue'
-
-import { useEventListener } from '@vueuse/core'
-
-
-/////////
-// Temporary copy until https://github.com/vueuse/vueuse/pull/5169 is merged and released
-////////
-
-/* eslint-disable */ 
-
-
-export interface UseDropZoneReturn {
-  files: ShallowRef<File[] | null>
-  isOverDropZone: ShallowRef<boolean>
-}
-
-export interface UseDropZoneOptions {
-  /**
-   * Allowed data types, if not set, all data types are allowed.
-   * Also can be a function to check the data types.
-   */
-  dataTypes?: MaybeRef<readonly string[]> | ((types: readonly string[]) => boolean)
-  /**
-   * Similar to dataTypes, but exposes the DataTransferItemList for custom validation.
-   * If provided, this function takes precedence over dataTypes.
-   */
-  checkValidity?: (items: DataTransferItemList) => boolean
-  onDrop?: (files: File[] | null, event: DragEvent) => void
-  onEnter?: (files: File[] | null, event: DragEvent) => void
-  onLeave?: (files: File[] | null, event: DragEvent) => void
-  onOver?: (files: File[] | null, event: DragEvent) => void
-  /**
-   * Allow multiple files to be dropped. Defaults to true.
-   */
-  multiple?: boolean
-  /**
-   * Prevent default behavior for unhandled events. Defaults to false.
-   */
-  preventDefaultForUnhandled?: boolean
-}
-
-export function useDropZone(
-  target: MaybeRefOrGetter<HTMLElement | Document | null | undefined>,
-  options: UseDropZoneOptions | UseDropZoneOptions['onDrop'] = {},
-): UseDropZoneReturn {
-  const isOverDropZone = shallowRef(false)
-  const files = shallowRef<File[] | null>(null)
-  let counter = 0
-  let isValid = true
-
-  if (isClient) {
-    const _options = typeof options === 'function' ? { onDrop: options } : options
-    const multiple = _options.multiple ?? true
-    const preventDefaultForUnhandled = _options.preventDefaultForUnhandled ?? false
-
-    const getFiles = (event: DragEvent) => {
-      const list = Array.from(event.dataTransfer?.files ?? [])
-      return list.length === 0 ? null : (multiple ? list : [list[0]])
-    }
-
-    const checkDataTypes = (types: string[]) => {
-      const dataTypes = unref(_options.dataTypes)
-
-      if (typeof dataTypes === 'function')
-        return dataTypes(types)
-
-      if (!dataTypes?.length)
-        return true
-
-      if (types.length === 0)
-        return false
-
-      return types.every(type =>
-        dataTypes.some(allowedType => type.includes(allowedType)),
-      )
-    }
-
-    const checkValidity = (items: DataTransferItemList) => {
-      if (_options.checkValidity) {
-        return _options.checkValidity(items)
-      }
-
-      const types = Array.from(items ?? []).map(item => item.type)
-
-      const dataTypesValid = checkDataTypes(types)
-      const multipleFilesValid = multiple || items.length <= 1
-
-      return dataTypesValid && multipleFilesValid
-    }
-
-    const isSafari = () => (
-      /^(?:(?!chrome|android).)*safari/i.test(navigator.userAgent)
-      && !('chrome' in window)
-    )
-
-    const handleDragEvent = (event: DragEvent, eventType: 'enter' | 'over' | 'leave' | 'drop') => {
-      const dataTransferItemList = event.dataTransfer?.items
-      isValid = (dataTransferItemList && checkValidity(dataTransferItemList)) ?? false
-
-      if (preventDefaultForUnhandled) {
-        event.preventDefault()
-      }
-
-      if (!isSafari() && !isValid) {
-        if (event.dataTransfer) {
-          event.dataTransfer.dropEffect = 'none'
-        }
-        return
-      }
-
-      event.preventDefault()
-      if (event.dataTransfer) {
-        event.dataTransfer.dropEffect = 'copy'
-      }
-
-      const currentFiles = getFiles(event)
-
-      switch (eventType) {
-        case 'enter':
-          counter += 1
-          isOverDropZone.value = true
-          _options.onEnter?.(null, event)
-          break
-        case 'over':
-          _options.onOver?.(null, event)
-          break
-        case 'leave':
-          counter -= 1
-          if (counter === 0)
-            isOverDropZone.value = false
-          _options.onLeave?.(null, event)
-          break
-        case 'drop':
-          counter = 0
-          isOverDropZone.value = false
-          if (isValid) {
-            files.value = currentFiles
-            _options.onDrop?.(currentFiles, event)
-          }
-          break
-      }
-    }
-
-    useEventListener<DragEvent>(target, 'dragenter', event => handleDragEvent(event, 'enter'))
-    useEventListener<DragEvent>(target, 'dragover', event => handleDragEvent(event, 'over'))
-    useEventListener<DragEvent>(target, 'dragleave', event => handleDragEvent(event, 'leave'))
-    useEventListener<DragEvent>(target, 'drop', event => handleDragEvent(event, 'drop'))
-  }
-
-  return {
-    files,
-    isOverDropZone,
-  }
-}
\ No newline at end of file