From a4592af5b1f673f639dad3678787ef8f2b4ef4ee Mon Sep 17 00:00:00 2001
From: iapyang <yklorse@gmail.com>
Date: Fri, 12 Nov 2021 17:39:02 +0800
Subject: [PATCH] =?UTF-8?q?REPORT-56417=20feat:=20=E6=8F=90=E4=BE=9B?=
 =?UTF-8?q?=E9=80=9A=E8=BF=87dataTransfer=E5=AF=B9=E8=B1=A1=E4=B8=8A?=
 =?UTF-8?q?=E4=BC=A0=E6=96=87=E4=BB=B6=E7=9A=84=E6=8E=A5=E5=8F=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/base/single/editor/editor.multifile.js   |  6 ++++++
 src/base/single/input/file.js                | 10 ++++++++++
 src/polyfill/event.js                        | 15 +++++++++++++++
 typescript/widget/editor/editor.multifile.ts |  2 ++
 4 files changed, 33 insertions(+)
 create mode 100644 src/polyfill/event.js

diff --git a/src/base/single/editor/editor.multifile.js b/src/base/single/editor/editor.multifile.js
index 68b5bcc2e..1175d01c7 100644
--- a/src/base/single/editor/editor.multifile.js
+++ b/src/base/single/editor/editor.multifile.js
@@ -91,6 +91,12 @@ BI.MultifileEditor = BI.inherit(BI.Widget, {
         this.file.upload();
     },
 
+    sendFiles: function (files) {
+        this._reset();
+
+        this.file.sendFiles(files);
+    },
+
     reset: function () {
         this._reset();
     }
diff --git a/src/base/single/input/file.js b/src/base/single/input/file.js
index fa589681b..904fbfcf5 100644
--- a/src/base/single/input/file.js
+++ b/src/base/single/input/file.js
@@ -683,6 +683,16 @@
             }
         },
 
+        sendFiles: function (files) {
+            if (!this.wrap) return;
+
+            this.wrap.dom.input.files = files;
+
+            var event = new CustomEvent("change");
+
+            this.wrap.dom.input.dispatchEvent(event);
+        },
+
         _setEnable: function (enable) {
             BI.File.superclass._setEnable.apply(this, arguments);
             if (enable === true) {
diff --git a/src/polyfill/event.js b/src/polyfill/event.js
new file mode 100644
index 000000000..346ec16c8
--- /dev/null
+++ b/src/polyfill/event.js
@@ -0,0 +1,15 @@
+(function () {
+    if (typeof window.CustomEvent === "function") return false; // If not IE
+
+    function CustomEvent (event, params) {
+        params = params || { bubbles: false, cancelable: false, detail: undefined };
+        var evt = document.createEvent("CustomEvent");
+        evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);
+
+        return evt;
+    }
+
+    CustomEvent.prototype = window.Event.prototype;
+
+    window.CustomEvent = CustomEvent;
+}());
diff --git a/typescript/widget/editor/editor.multifile.ts b/typescript/widget/editor/editor.multifile.ts
index 3a29e0960..905d423e6 100644
--- a/typescript/widget/editor/editor.multifile.ts
+++ b/typescript/widget/editor/editor.multifile.ts
@@ -30,4 +30,6 @@ export declare class MultifileEditor extends Widget {
         size: number;
         type: string;
     }[];
+
+    sendFiles(files: FileList): void;
 }