Move CrxFile, FileReader, ExtensionResource to src/extensions.

chrome/common/extensions/extension_resource.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/common/extensions/extension_resource.h"
-
-#include "base/file_util.h"
-#include "base/logging.h"
-#include "base/threading/thread_restrictions.h"
-
-ExtensionResource::ExtensionResource() : follow_symlinks_anywhere_(false) {
-}
-
-ExtensionResource::ExtensionResource(const std::string& extension_id,
-                                     const base::FilePath& extension_root,
-                                     const base::FilePath& relative_path)
-    : extension_id_(extension_id),
-      extension_root_(extension_root),
-      relative_path_(relative_path),
-      follow_symlinks_anywhere_(false) {
-}
-
-ExtensionResource::~ExtensionResource() {}
-
-void ExtensionResource::set_follow_symlinks_anywhere() {
-  follow_symlinks_anywhere_ = true;
-}
-
-const base::FilePath& ExtensionResource::GetFilePath() const {
-  if (extension_root_.empty() || relative_path_.empty()) {
-    DCHECK(full_resource_path_.empty());
-    return full_resource_path_;
-  }
-
-  // We've already checked, just return last value.
-  if (!full_resource_path_.empty())
-    return full_resource_path_;
-
-  full_resource_path_ = GetFilePath(
-      extension_root_, relative_path_,
-      follow_symlinks_anywhere_ ?
-          FOLLOW_SYMLINKS_ANYWHERE : SYMLINKS_MUST_RESOLVE_WITHIN_ROOT);
-  return full_resource_path_;
-}
-
-// static
-base::FilePath ExtensionResource::GetFilePath(
-    const base::FilePath& extension_root,
-    const base::FilePath& relative_path,
-    SymlinkPolicy symlink_policy) {
-  // We need to resolve the parent references in the extension_root
-  // path on its own because IsParent doesn't like parent references.
-  base::FilePath clean_extension_root(extension_root);
-  if (!file_util::AbsolutePath(&clean_extension_root))
-    return base::FilePath();
-
-  base::FilePath full_path = clean_extension_root.Append(relative_path);
-
-  // If we are allowing the file to be a symlink outside of the root, then the
-  // path before resolving the symlink must still be within it.
-  if (symlink_policy == FOLLOW_SYMLINKS_ANYWHERE) {
-    std::vector<base::FilePath::StringType> components;
-    relative_path.GetComponents(&components);
-    int depth = 0;
-
-    for (std::vector<base::FilePath::StringType>::const_iterator
-         i = components.begin(); i != components.end(); i++) {
-      if (*i == base::FilePath::kParentDirectory) {
-        depth--;
-      } else if (*i != base::FilePath::kCurrentDirectory) {
-        depth++;
-      }
-      if (depth < 0) {
-        return base::FilePath();
-      }
-    }
-  }
-
-  // We must resolve the absolute path of the combined path when
-  // the relative path contains references to a parent folder (i.e., '..').
-  // We also check if the path exists because the posix version of AbsolutePath
-  // will fail if the path doesn't exist, and we want the same behavior on
-  // Windows... So until the posix and Windows version of AbsolutePath are
-  // unified, we need an extra call to PathExists, unfortunately.
-  // TODO(mad): Fix this once AbsolutePath is unified.
-  if (file_util::AbsolutePath(&full_path) &&
-      file_util::PathExists(full_path) &&
-      (symlink_policy == FOLLOW_SYMLINKS_ANYWHERE ||
-       clean_extension_root.IsParent(full_path))) {
-    return full_path;
-  }
-
-  return base::FilePath();
-}
-
-// Unit-testing helpers.
-base::FilePath::StringType ExtensionResource::NormalizeSeperators(
-    const base::FilePath::StringType& path) const {
-#if defined(FILE_PATH_USES_WIN_SEPARATORS)
-  base::FilePath::StringType win_path = path;
-  for (size_t i = 0; i < win_path.length(); i++) {
-    if (base::FilePath::IsSeparator(win_path[i]))
-      win_path[i] = base::FilePath::kSeparators[0];
-  }
-  return win_path;
-#else
-  return path;
-#endif  // FILE_PATH_USES_WIN_SEPARATORS
-}
-
-bool ExtensionResource::ComparePathWithDefault(
-    const base::FilePath& path) const {
-  // Make sure we have a cached value to test against...
-  if (full_resource_path_.empty())
-    GetFilePath();
-  if (NormalizeSeperators(path.value()) ==
-    NormalizeSeperators(full_resource_path_.value())) {
-    return true;
-  } else {
-    return false;
-  }
-}