Add support for drive files to chrome.fileBrowserHandler.selectFile

chrome/browser/chromeos/extensions/file_browser_handler_api.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/chromeos/extensions/file_browser_handler_api.h"
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/message_loop_proxy.h"
 #include "base/platform_file.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/extensions/file_handler_util.h"
 #include "chrome/browser/chromeos/extensions/file_manager_util.h"
+#include "chrome/browser/chromeos/gdata/gdata_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/chrome_select_file_policy.h"
 #include "chrome/browser/ui/select_file_dialog.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/common/extensions/api/file_browser_handler_internal.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/child_process_security_policy.h"
@@ skipping 137 matching lines @@
   if (function_.get())
     function_->OnFilePathSelected(success, selected_path);
   function_ = NULL;
 }
 
 typedef base::Callback<void (bool success,
                              const std::string& file_system_name,
                              const GURL& file_system_root)>
     FileSystemOpenCallback;
 
-void RelayOpenFileSystemCallbackToFileThread(
+void RunOpenFileSystemCallback(
     const FileSystemOpenCallback& callback,
     base::PlatformFileError error,
     const std::string& file_system_name,
     const GURL& file_system_root) {
   bool success = (error == base::PLATFORM_FILE_OK);
-  content::BrowserThread::PostTask(content::BrowserThread::FILE, FROM_HERE,
-      base::Bind(callback, success, file_system_name, file_system_root));
+  callback.Run(success, file_system_name, file_system_root);
 }
 
 }  // namespace
 
 FileHandlerSelectFileFunction::FileHandlerSelectFileFunction() {}
 
-void FileHandlerSelectFileFunction::OnFilePathSelected(
-    bool success,
-    const FilePath& full_path) {
-  if (!success) {
-    Respond(false, std::string(), GURL(), FilePath());
-    return;
-  }
-
-  full_path_ = full_path;
-
-  BrowserContext::GetFileSystemContext(profile_)->OpenFileSystem(
-      source_url_.GetOrigin(), fileapi::kFileSystemTypeExternal, false,
-      base::Bind(&RelayOpenFileSystemCallbackToFileThread,
-          base::Bind(&FileHandlerSelectFileFunction::CreateFileOnFileThread,
-                     this)));
-};
-
 // static
 void FileHandlerSelectFileFunction::set_file_selector_for_test(
     FileSelector* file_selector) {
   FileHandlerSelectFileFunction::file_selector_for_test_ = file_selector;
 }
 
 // static
 void FileHandlerSelectFileFunction::set_gesture_check_disabled_for_test(
     bool disabled) {
   FileHandlerSelectFileFunction::gesture_check_disabled_for_test_ = disabled;
@@ skipping 11 matching lines @@
     return false;
   }
 
   // If |file_selector_| is set (e.g. in test), use it instesad of creating new
   // file selector.
   FileSelector* file_selector = GetFileSelector();
   file_selector->SelectFile(suggested_name.BaseName(), GetCurrentBrowser());
   return true;
 }
 
-void FileHandlerSelectFileFunction::CreateFileOnFileThread(
+void FileHandlerSelectFileFunction::OnFilePathSelected(
     bool success,
-    const std::string& file_system_name,
-    const GURL& file_system_root) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+    const FilePath& full_path) {
+  if (!success) {
+    Respond(false, std::string(), GURL(), FilePath());
+    return;
+  }
 
-  if (success)
-    success = DoCreateFile();
-  content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
-      base::Bind(&FileHandlerSelectFileFunction::OnFileCreated, this,
-          success, file_system_name, file_system_root));
-}
+  full_path_ = full_path;
 
-bool FileHandlerSelectFileFunction::DoCreateFile() {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+  BrowserContext::GetFileSystemContext(profile_)->OpenFileSystem(
+      source_url_.GetOrigin(), fileapi::kFileSystemTypeExternal, false,
+      base::Bind(&RunOpenFileSystemCallback,
+          base::Bind(&FileHandlerSelectFileFunction::OnFileSystemOpened,
+                     this)));
+};
 
-  // Don't allow links.
-  if (file_util::PathExists(full_path_) && file_util::IsLink(full_path_))
-    return false;
-
-  bool created = false;
-  base::PlatformFileError error = base::PLATFORM_FILE_OK;
-  int creation_flags = base::PLATFORM_FILE_CREATE_ALWAYS |
-                       base::PLATFORM_FILE_READ |
-                       base::PLATFORM_FILE_WRITE;
-  base::CreatePlatformFile(full_path_, creation_flags, &created, &error);
-  return error == base::PLATFORM_FILE_OK;
-}
-
-void FileHandlerSelectFileFunction::OnFileCreated(
+void FileHandlerSelectFileFunction::OnFileSystemOpened(
     bool success,
     const std::string& file_system_name,
     const GURL& file_system_root) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 
-  FilePath virtual_path;
-  if (success)
-    virtual_path = GrantPermissions();
-  Respond(success, file_system_name, file_system_root, virtual_path);
+  if (success) {
+    GrantPermissions(base::Bind(
+        &FileHandlerSelectFileFunction::Respond, this,
+            success, file_system_name, file_system_root));
+    return;
+  }
+  Respond(success, file_system_name, file_system_root, FilePath());
 }
 
-FilePath FileHandlerSelectFileFunction::GrantPermissions() {
+void FileHandlerSelectFileFunction::GrantPermissions(
+    const GrantPermissionsCallback& callback) {
   fileapi::ExternalFileSystemMountPointProvider* external_provider =
       BrowserContext::GetFileSystemContext(profile_)->external_provider();
   DCHECK(external_provider);
 
   FilePath virtual_path;
   external_provider->GetVirtualPath(full_path_, &virtual_path);
   DCHECK(!virtual_path.empty());
 
   // Grant access to this particular file to target extension. This will
   // ensure that the target extension can access only this FS entry and
   // prevent from traversing FS hierarchy upward.
   external_provider->GrantFileAccessToExtension(extension_id(), virtual_path);
-  content::ChildProcessSecurityPolicy::GetInstance()->GrantPermissionsForFile(
-      render_view_host()->GetProcess()->GetID(),
+
+  // Give read write permissions for the file.
+  permissions_to_grant_.push_back(std::make_pair(
       full_path_,
-      file_handler_util::GetReadWritePermissions());
+      file_handler_util::GetReadWritePermissions()));
 
-  return virtual_path;
+  if (!gdata::util::IsUnderGDataMountPoint(full_path_)) {
+    OnGotPermissionsToGrant(callback, virtual_path);
+    return;
+  }
+
+  // For drive files, we also have to grant permissions for cache paths.
+  scoped_ptr<std::vector<FilePath> > gdata_paths(new std::vector<FilePath>());
+  gdata_paths->push_back(virtual_path);
+
+  gdata::util::InsertGDataCachePathsPermissions(
+      profile(),
+      gdata_paths.Pass(),
+      &permissions_to_grant_,
+      base::Bind(&FileHandlerSelectFileFunction::OnGotPermissionsToGrant,
+          this, callback, virtual_path));
+}
+
+void FileHandlerSelectFileFunction::OnGotPermissionsToGrant(
+    const GrantPermissionsCallback& callback,
+    const FilePath& virtual_path) {
+  for (size_t i = 0; i < permissions_to_grant_.size(); i++) {
+    content::ChildProcessSecurityPolicy::GetInstance()->GrantPermissionsForFile(
+        render_view_host()->GetProcess()->GetID(),
+        permissions_to_grant_[i].first,
+        permissions_to_grant_[i].second);
+  }
+  callback.Run(virtual_path);
 }
 
 void FileHandlerSelectFileFunction::Respond(
     bool success,
     const std::string& file_system_name,
     const GURL& file_system_root,
     const FilePath& virtual_path) {
   scoped_ptr<SelectFile::Results::Result> result(
       new SelectFile::Results::Result());
   result->success = success;
@@ skipping 15 matching lines @@
     result->set_function_for_test(this);
     return result;
   }
   return new FileSelectorImpl(this);
 }
 
 FileSelector* FileHandlerSelectFileFunction::file_selector_for_test_ = NULL;
 
 bool FileHandlerSelectFileFunction::gesture_check_disabled_for_test_ = false;