From 9442c72ce3d87cd9c8dde8faa6eb088430ddace8 Mon Sep 17 00:00:00 2001
From: Duc Filan <ducfilan@gmail.com>
Date: Thu, 21 Nov 2024 16:08:22 +0800
Subject: [PATCH] Customize drag from outside event's length

---
 .../dragAndDrop/EventContainerWrapper.js      | 24 +++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/src/addons/dragAndDrop/EventContainerWrapper.js b/src/addons/dragAndDrop/EventContainerWrapper.js
index 583da4077..07742e55c 100644
--- a/src/addons/dragAndDrop/EventContainerWrapper.js
+++ b/src/addons/dragAndDrop/EventContainerWrapper.js
@@ -118,9 +118,11 @@ class EventContainerWrapper extends React.Component {
       boundaryBox
     )
 
+    const end = this._calculateDnDEnd(start)
+
     this.context.draggable.onDropFromOutside({
       start,
-      end: slotMetrics.nextSlot(start),
+      end,
       allDay: false,
       resource,
     })
@@ -133,11 +135,25 @@ class EventContainerWrapper extends React.Component {
       { y: point.y, x: point.x },
       bounds
     )
-    const end = slotMetrics.nextSlot(start)
+    const end = this._calculateDnDEnd(start)
     const event = this.context.draggable.dragFromOutsideItem()
     this.update(event, slotMetrics.getRange(start, end, false, true))
   }
 
+  _calculateDnDEnd = (start) => {
+    const { accessors, slotMetrics, localizer } = this.props
+    const event = this.context.draggable.dragFromOutsideItem()
+    const { duration: eventDuration } = eventTimes(event, accessors, localizer)
+
+    const end = slotMetrics.nextSlot(start)
+    const eventHasDuration = !isNaN(eventDuration)
+    if (eventHasDuration) {
+      const eventEndSlot = localizer.add(start, eventDuration, 'milliseconds')
+      end = new Date(Math.max(eventEndSlot, end))
+    }
+    return end
+  }
+
   updateParentScroll = (parent, node) => {
     setTimeout(() => {
       const draggedEl = qsa(node, '.rbc-addons-dnd-drag-preview')[0]
@@ -152,8 +168,8 @@ class EventContainerWrapper extends React.Component {
             parent,
             Math.min(
               draggedEl.offsetTop -
-                parent.offsetHeight +
-                draggedEl.offsetHeight,
+              parent.offsetHeight +
+              draggedEl.offsetHeight,
               parent.scrollHeight
             )
           )