DevTools: introduce WI.UISourceCode.requestMetadata()

third_party/WebKit/Source/devtools/front_end/workspace/IsolatedFileSystem.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 87 matching lines @@
  * @param {!DOMError} error
  * @return {string}
  */
 WebInspector.IsolatedFileSystem.errorMessage = function(error)
 {
     return WebInspector.UIString("File system error: %s", error.message);
 }
 
 WebInspector.IsolatedFileSystem.prototype = {
     /**
+     * @param {string} path
+     * @return {!Promise<?{modificationTime: !Date, size: number}>}
+     */
+    getMetadata: function(path)
+    {
+        var fulfill;
+        var promise = new Promise(f => fulfill = f);
+        this._domFileSystem.root.getFile(path, null, fileEntryLoaded, errorHandler);
+        return promise;
+
+        /**
+         * @param {!FileEntry} entry
+         */
+        function fileEntryLoaded(entry)
+        {
+            entry.getMetadata(fulfill, errorHandler);
+        }
+
+        /**
+         * @param {!FileError} error
+         */
+        function errorHandler(error)
+        {
+            var errorMessage = WebInspector.IsolatedFileSystem.errorMessage(error);
+            console.error(errorMessage + " when getting file metadata '" + path);
+            fulfill(null);
+        }
+    },
+
+    /**
      * @return {!Array<string>}
      */
     filePaths: function()
     {
         return this._filePaths.valuesArray();
     },
 
     /**
      * @return {!Array<string>}
      */
@@ skipping 525 matching lines @@
     /**
      * @param {!WebInspector.Progress} progress
      */
     indexContent: function(progress)
     {
         progress.setTotalWork(1);
         var requestId = this._manager.registerProgress(progress);
         InspectorFrontendHost.indexPath(requestId, this._embedderPath);
     }
 }