Loads local resources from current locale subtree if available, if not it fal...

chrome/common/extensions/extension_resource.h

+// Copyright (c) 2009 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.
+
+#ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_RESOURCE_H_
+#define CHROME_COMMON_EXTENSIONS_EXTENSION_RESOURCE_H_
+
+#include "base/file_path.h"
+
+// Represents a resource inside an extension. For example, an image, or a
+// JavaScript file. This is more complicated than just a simple FilePath
+// because extension resources can come from multiple physical file locations
+// depending on locale.
+class ExtensionResource {
+ public:
+  ExtensionResource();
+
+  ExtensionResource(const FilePath& extension_root,
+                    const FilePath& relative_path);
+
+  // Returns actual path to the resource (default or locale specific).
+  // *** MIGHT HIT FILESYSTEM. Do not call on UI thread! ***
+  const FilePath& GetFilePath() const;
+
+  // Getters
+  const FilePath& extension_root() const { return extension_root_; }
+  const FilePath& relative_path() const { return relative_path_; }
+
+  // Unittest helpers.
+  FilePath::StringType NormalizeSeperators(FilePath::StringType path) const;
+  bool ComparePathWithDefault(const FilePath& path) const;
+
+ private:
+  // Returns normalized full path to the resource.
+  // Resource doesn't have to exist.
+  FilePath CombinePathsSafely(const FilePath& extension_root,
+                              const FilePath& relative_path) const;
+
+  // Extension root.
+  FilePath extension_root_;
+
+  // Relative path to resource.
+  FilePath relative_path_;
+
+  // Full path to extension resource. Starts empty.
+  mutable FilePath full_resource_path_;
+};
+
+#endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_RESOURCE_H_