Refactor "IsUnderDriveMountPoint" in v2 app code for generalization to non-Drive volumes.

chrome/browser/chromeos/file_manager/filesystem_api_util.cc

+// Copyright 2014 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/file_manager/filesystem_api_util.h"
+
+#include "base/callback.h"
+#include "base/files/file_path.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/chromeos/drive/file_errors.h"
+#include "chrome/browser/chromeos/drive/file_system_interface.h"
+#include "chrome/browser/chromeos/drive/file_system_util.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace file_manager {
+namespace util {
+
+namespace {
+
+void GetMimeTypeAfterGetResourceEntry(
+    const base::Callback<void(bool, const std::string&)>& callback,
+    drive::FileError error,
+    scoped_ptr<drive::ResourceEntry> entry) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  if (error != drive::FILE_ERROR_OK || !entry->has_file_specific_info()) {
+    callback.Run(false, std::string());
+    return;
+  }
+  callback.Run(true, entry->file_specific_info().content_mime_type());
+}
+
+void CheckDirectoryAfterDriveCheck(const base::Callback<void(bool)>& callback,
+                                   drive::FileError error) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  return callback.Run(error == drive::FILE_ERROR_OK);
+}
+
+void CheckWritableAfterDriveCheck(const base::Callback<void(bool)>& callback,
+                                  drive::FileError error,
+                                  const base::FilePath& local_path) {
+  // This is called on the IO-allowed blocking pool. Call back to UI.
+  content::BrowserThread::PostTask(
+      content::BrowserThread::UI,
+      FROM_HERE,
+      base::Bind(callback, error == drive::FILE_ERROR_OK));
+}
+
+}  // namespace
+
+bool IsUnderNonNativeLocalPath(Profile* profile,
+                        const base::FilePath& path) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  // TODO(kinaba): support other types of volumes besides Drive.
+  return drive::util::IsUnderDriveMountPoint(path);
+}
+
+void GetNonNativeLocalPathMimeType(
+    Profile* profile,
+    const base::FilePath& path,
+    const base::Callback<void(bool, const std::string&)>& callback) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  // TODO(kinaba): support other types of volumes besides Drive.
+  drive::FileSystemInterface* file_system =
+      drive::util::GetFileSystemByProfile(profile);
+  if (!file_system) {
+    content::BrowserThread::PostTask(
+        content::BrowserThread::UI,
+        FROM_HERE,
+        base::Bind(callback, false, std::string()));
+    return;
+  }
+
+  file_system->GetResourceEntry(
+      drive::util::ExtractDrivePath(path),
+      base::Bind(&GetMimeTypeAfterGetResourceEntry, callback));
+}
+
+void IsNonNativeLocalPathDirectory(
+    Profile* profile,
+    const base::FilePath& path,
+    const base::Callback<void(bool)>& callback) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  // TODO(kinaba): support other types of volumes besides Drive.
+  drive::util::CheckDirectoryExists(
+      profile,
+      path,
+      base::Bind(&CheckDirectoryAfterDriveCheck, callback));
+}
+
+void PrepareNonNativeLocalPathWritableFile(
+    Profile* profile,
+    const base::FilePath& path,
+    const base::Callback<void(bool)>& callback) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  // TODO(kinaba): support other types of volumes besides Drive.
+  drive::util::PrepareWritableFileAndRun(
+      profile,
+      path,
+      base::Bind(&CheckWritableAfterDriveCheck, callback));
+}
+
+}  // namespace util
+}  // namespace file_manager