file manager: disable "Save" and "New Folder" buttons in the media/ directory

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.
 
 // WK Bug 55728 is fixed on the chrome 12 branch but not on the trunk.
 // TODO(rginda): Enable this everywhere once we have a trunk-worthy fix.
 const ENABLE_EXIF_READER = navigator.userAgent.match(/chrome\/12\.0/i);
 
 // Thumbnail view is painful without the exif reader.
 const ENABLE_THUMBNAIL_VIEW = ENABLE_EXIF_READER;
@@ skipping 1468 matching lines @@
       selectable = (this.selection.directoryCount == 0 &&
                     this.selection.fileCount == 1);
     } else if (this.dialogType_ ==
                FileManager.DialogType.SELECT_OPEN_MULTI_FILE) {
       selectable = (this.selection.directoryCount == 0 &&
                     this.selection.fileCount >= 1);
     } else if (this.dialogType_ == FileManager.DialogType.SELECT_SAVEAS_FILE) {
       if (this.selection.leadEntry && this.selection.leadEntry.isFile)
         this.filenameInput_.value = this.selection.leadEntry.name;
 
-      selectable = !!this.filenameInput_.value;
+      if (this.currentDirEntry_.fullPath == '/' ||
+          this.currentDirEntry_.fullPath == MEDIA_DIRECTORY) {
+        // Nothing can be saved in to the root or media/ directories.
+        selectable = false;
+      } else {
+        selectable = !!this.filenameInput_.value;
+      }
     } else if (this.dialogType_ == FileManager.DialogType.FULL_PAGE) {
       // No "select" buttons on the full page UI.
       selectable = true;
     } else {
       throw new Error('Unknown dialog type');
     }
 
     this.okButton_.disabled = !selectable;
     this.updatePreview_();
   };
@@ skipping 25 matching lines @@
    *
    * @param {cr.Event} event The directory-changed event.
    */
   FileManager.prototype.onDirectoryChanged_ = function(event) {
     if (event.saveHistory) {
       history.pushState(this.currentDirEntry_.fullPath,
                         this.currentDirEntry_.fullPath,
                         location.href);
     }
 
-    // New folder should never be enabled in the root directory.
-    this.newFolderButton_.disabled = this.currentDirEntry_.fullPath == '/';
+    // New folder should never be enabled in the root or media/ directories.
+    this.newFolderButton_.disabled =
+        (this.currentDirEntry_.fullPath == '/' ||
+         this.currentDirEntry_.fullPath == MEDIA_DIRECTORY);
 
     this.document_.title = this.currentDirEntry_.fullPath;
     this.rescanDirectory_();
   };
 
   /**
    * Update the UI when a disk is mounted or unmounted.
    *
    * @param {string} path The path that has been mounted or unmounted.
    */
@@ skipping 449 matching lines @@
     } else if (this.dialogType_ == FileManager.DialogType.SELECT_OPEN_FILE) {
       if (!this.selection.leadEntry.isFile)
         throw new Error('Selected entry is not a file!');
     }
 
     chrome.fileBrowserPrivate.selectFile(ary[0], 0);
     window.close();
   };
 
 })();