use await in openFile

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

@@ -625,15 +625,13 @@ class FileManager extends Plugin {
       this._deps.config.set('currentFile', file)
       this.openedFiles[file] = file
 
-      return new Promise((resolve, reject) => {
+      let content = ''
-        provider.get(file, (error, content) => {
+      try {
-          if (error) {
+        content = await provider.get(file)   
+      } catch (error) {
         console.log(error)
-            reject(error)
+        throw error
-          } else {
+      }
-            if (provider.isReadOnly(file)) {
-              this.editor.openReadOnly(file, content)
-            } else {
       if (provider.isReadOnly(file)) {
         this.editor.openReadOnly(file, content)
       } else {
@@ -642,15 +640,7 @@ class FileManager extends Plugin {
       // TODO: Only keep `this.emit` (issue#2210)
       this.emit('currentFileChanged', file)
       this.events.emit('currentFileChanged', file)
-              resolve(true)
+      return true      
-            }
-            // TODO: Only keep `this.emit` (issue#2210)
-            this.emit('currentFileChanged', file)
-            this.events.emit('currentFileChanged', file)
-            resolve(true)
-          }
-        })
-      })
     }
   }