File browser starts in File Shelf folder if no external storage attached

chrome/browser/resources/file_manager/js/file_manager.js

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Setting the src of an img to an empty string can crash the browser, so we
 // use an empty 1x1 gif instead.
 const EMPTY_IMAGE_URI = 'data:image/gif;base64,'
         + 'R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw%3D%3D';
 
 var g_slideshow_data = null;
@@ skipping 40 matching lines @@
   this.currentButter_ = null;
 
   // True if we should filter out files that start with a dot.
   this.filterFiles_ = true;
 
   this.commands_ = {};
 
   this.document_ = dialogDom.ownerDocument;
   this.dialogType_ = this.params_.type || FileManager.DialogType.FULL_PAGE;
 
-  this.defaultPath_ = this.params_.defaultPath || '/';
-
   this.alert = new cr.ui.dialogs.AlertDialog(this.dialogDom_);
   this.confirm = new cr.ui.dialogs.ConfirmDialog(this.dialogDom_);
   this.prompt = new cr.ui.dialogs.PromptDialog(this.dialogDom_);
 
   // TODO(dgozman): This will be changed to LocaleInfo.
   this.locale_ = new v8Locale(navigator.language);
 
   // TODO(rginda): 6/22/11: Remove this test when createDateTimeFormat is
   // available in all chrome trunk builds.
   if ('createDateTimeFormat' in this.locale_) {
@@ skipping 54 matching lines @@
   chrome.fileBrowserPrivate.getMountPoints(function(mountPoints) {
       self.mountPoints_ = mountPoints;
   });
 
   chrome.fileBrowserHandler.onExecute.addListener(
     this.onFileTaskExecute_.bind(this));
 
   this.initCommands_();
   this.initDom_();
   this.initDialogType_();
-  this.initDefaultDirectory_();
+  this.initDefaultDirectory_(this.params_.defaultPath);
 
   this.summarizeSelection_();
   this.updatePreview_();
 
   chrome.fileBrowserPrivate.onDiskChanged.addListener(
       this.onDiskChanged_.bind(this));
 
   this.refocus();
 
   // Pass all URLs to the metadata reader until we have a correct filter.
@@ skipping 12 matching lines @@
 (function() {
 
   // Private variables and helper functions.
 
   /**
    * Unicode codepoint for 'BLACK RIGHT-POINTING SMALL TRIANGLE'.
    */
   const RIGHT_TRIANGLE = '\u25b8';
 
   /**
+   * The DirectoryEntry.fullPath value of the Downloads directory.
+   */
+  const DOWNLOADS_DIRECTORY = '/Downloads';
+
+  /**
    * The DirectoryEntry.fullPath value of the directory containing externally
    * mounted removable storage volumes.
    */
   const REMOVABLE_DIRECTORY = '/removable';
 
   /**
    * The DirectoryEntry.fullPath value of the directory containing externally
    * mounted archive file volumes.
    */
   const ARCHIVE_DIRECTORY = '/archive';
@@ skipping 595 matching lines @@
           (this.currentDirEntry_ &&
            this.currentDirEntry_.fullPath != '/');
         if (this.copyButton_)
           this.copyButton_.disabled = !event.canExecute;
         break;
 
       case 'paste':
         event.canExecute =
           (this.clipboard_ &&
            this.clipboard_.sourceDirEntry.fullPath !=
-           this.currentDirEntry_.fullPath_ &&
+           this.currentDirEntry_.fullPath &&
            !isSystemDirEntry(this.currentDirEntry_));
         if (this.pasteButton_)
           this.pasteButton_.disabled = !event.canExecute;
         break;
 
       case 'rename':
         event.canExecute =
           (// Initialized to the point where we have a current directory
            this.currentDirEntry_ &&
            // Rename not in progress.
@@ skipping 230 matching lines @@
       this.currentList_.redraw();
     }
   };
 
   FileManager.prototype.resolvePath = function(
       path, resultCallback, errorCallback) {
     return util.resolvePath(this.filesystem_.root, path, resultCallback,
                             errorCallback);
   };
 
-  FileManager.prototype.initDefaultDirectory_ = function() {
+  FileManager.prototype.initDefaultDirectory_ = function(path) {
+    if (!path) {
+      // No preset given, find a good place to start.
+      // Check for removable devices, if there are none, go to Downloads.
+      for (var i = 0; i != this.rootEntries_.length; i++) {
+        var rootEntry = this.rootEntries_[i];
+        if (rootEntry.fullPath == REMOVABLE_DIRECTORY) {
+          var foundRemovable = false;
+          var self = this;
+          util.forEachDirEntry(rootEntry, function(result) {
+            if (result) {
+              foundRemovable = true;
+            } else {  // Done enumerating, and we know the answer.
+              self.initDefaultDirectory_(
+                  foundRemovable ? '/' : DOWNLOADS_DIRECTORY);
+            }
+          });
+          return;
+        }
+      }
+
+      // Removable root directory is missing altogether.
+      path = DOWNLOADS_DIRECTORY;
+    }
+
     // Split the dirname from the basename.
-    var ary = this.defaultPath_.match(/^(.*?)(?:\/([^\/]+))?$/);
+    var ary = path.match(/^(.*?)(?:\/([^\/]+))?$/);
     if (!ary) {
       console.warn('Unable to split default path: ' + path);
       self.changeDirectory('/', CD_NO_HISTORY);
       return;
     }
 
     var baseName = ary[1];
     var leafName = ary[2];
 
     var self = this;
@@ skipping 20 matching lines @@
         self.filenameInput_.value = leafName;
         if (err = FileError.NOT_FOUND_ERR) {
           // Leaf does not exist, it's just a suggested file name.
           self.changeDirectoryEntry(baseDirEntry, CD_NO_HISTORY);
         } else {
           console.log('Unexpected error resolving default leaf: ' + err);
           self.changeDirectoryEntry('/', CD_NO_HISTORY);
         }
       }
 
-      self.resolvePath(self.defaultPath_, onLeafFound, onLeafError);
+      self.resolvePath(path, onLeafFound, onLeafError);
     }
 
     function onBaseError(err) {
       // Set filename first so OK button will update in changeDirectory.
       self.filenameInput_.value = leafName;
       console.log('Unexpected error resolving default base "' +
                   baseName + '": ' + err);
       self.changeDirectory('/', CD_NO_HISTORY);
     }
 
@@ skipping 1803 matching lines @@
 
     if (msg) {
       console.log('no no no');
       this.alert.show(msg, onAccept);
       return false;
     }
 
     return true;
   };
 })();