Pull request #2279: REPORT-56417 提供通过FileList对象上传文件的接口

Merge in VISUAL/fineui from ~TELLER/fineui:datatransfer to master

* commit 'a4592af5b1f673f639dad3678787ef8f2b4ef4ee':
  REPORT-56417 feat: 提供通过dataTransfer对象上传文件的接口

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();
     }

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) {

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;
+}());

typescript/widget/editor/editor.multifile.ts

@@ -30,4 +30,6 @@ export declare class MultifileEditor extends Widget {
         size: number;
         type: string;
     }[];
+
+    sendFiles(files: FileList): void;
 }