Merge pull request #4101 from ethereum/fixdragancenstor

fix dragging into ancestor

apps/remix-ide/src/app/files/fileManager.ts

@@ -938,9 +938,16 @@ class FileManager extends Plugin {
       await this._handleIsDir(src, `Cannot move ${src}. Path is not directory.`)
       await this._handleIsDir(dest, `Cannot move content into ${dest}. Path is not directory.`)
       const dirName = helper.extractNameFromKey(src)
+      const provider = this.fileProviderOf(src)
+
       if (await this.exists(dest + '/' + dirName) || src === dest) {
         return false
       }
+
+      if (provider.isSubDirectory(src, dest)) {
+        this.call('notification', 'toast', recursivePasteToastMsg())
+        return false
+      } 
       return true
     } catch (e) {
       console.log(e)
@@ -998,7 +1005,13 @@ class FileManager extends Plugin {
       if (await this.exists(dest + '/' + dirName) || src === dest) {
         throw createError({ code: 'EEXIST', message: `Cannot move ${src}. Folder already exists at destination ${dest}` })
       }
-      await this.copyDir(src, dest, dirName)
+      const provider = this.fileProviderOf(src)
+
+      if (provider.isSubDirectory(src, dest)) {
+        this.call('notification', 'toast', recursivePasteToastMsg())
+        return false
+      } 
+      await this.inDepthCopy(src, dest, dirName)
       await this.remove(src)
 
     } catch (e) {