From 59edca783e2b2cff520b2af9e986315ab8b21ea3 Mon Sep 17 00:00:00 2001
From: Dan Stillman <dstillman@zotero.org>
Date: Sun, 9 Jul 2017 05:49:02 -0400
Subject: [PATCH] Allow dragging onto welcome text

---
 chrome/content/zotero/xpcom/itemTreeView.js    |  2 ++
 chrome/content/zotero/xpcom/libraryTreeView.js | 12 +++++++++++-
 chrome/content/zotero/zoteroPane.xul           |  5 ++++-
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/chrome/content/zotero/xpcom/itemTreeView.js b/chrome/content/zotero/xpcom/itemTreeView.js
index 8394165a41..cdeea68467 100644
--- a/chrome/content/zotero/xpcom/itemTreeView.js
+++ b/chrome/content/zotero/xpcom/itemTreeView.js
@@ -1765,6 +1765,8 @@ Zotero.ItemTreeView.prototype._updateIntroText = function() {
 					};
 				}
 			}
+			
+			div.setAttribute('allowdrop', true);
 		}
 		// My Publications
 		else if (this.collectionTreeRow.isPublications()) {
diff --git a/chrome/content/zotero/xpcom/libraryTreeView.js b/chrome/content/zotero/xpcom/libraryTreeView.js
index f68eb65f94..31d757e5f3 100644
--- a/chrome/content/zotero/xpcom/libraryTreeView.js
+++ b/chrome/content/zotero/xpcom/libraryTreeView.js
@@ -328,7 +328,17 @@ Zotero.LibraryTreeView.prototype = {
 		
 		var target = event.target;
 		if (target.tagName != 'treechildren') {
-			return false;
+			let doc = target.ownerDocument;
+			// Consider a drop on the items pane message box (e.g., when showing the welcome text)
+			// a drop on the items tree
+			let msgBox = doc.getElementById('zotero-items-pane-message-box');
+			if (msgBox.contains(target) && msgBox.firstChild.hasAttribute('allowdrop')) {
+				target = doc.querySelector('#zotero-items-tree treechildren');
+			}
+			else {
+				this._setDropEffect(event, "none");
+				return false;
+			}
 		}
 		var tree = target.parentNode;
 		let row = {}, col = {}, obj = {};
diff --git a/chrome/content/zotero/zoteroPane.xul b/chrome/content/zotero/zoteroPane.xul
index de2c4c9ab4..1d17641e69 100644
--- a/chrome/content/zotero/zoteroPane.xul
+++ b/chrome/content/zotero/zoteroPane.xul
@@ -565,7 +565,10 @@
 
 							<!-- Label for displaying messages when items pane is hidden
 							 (e.g. "Advanced search mode — press Enter to search.")-->
-							<vbox id="zotero-items-pane-message-box" pack="center" align="center"/>
+							<vbox id="zotero-items-pane-message-box" pack="center" align="center"
+								ondragenter="return ZoteroPane.itemsView.onDragEnter(event)"
+								ondragover="return ZoteroPane.itemsView.onDragOver(event)"
+								ondrop="ZoteroPane.itemsView.onDrop(event); ZoteroPane.itemsView.drop(-1, -1, event.dataTransfer)"/>
 						</deck>
 					</vbox>