Move Feature and Manifest to top-level extensions.

chrome/common/extensions/manifest.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/manifest.h"
-
-#include "base/basictypes.h"
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-#include "base/strings/string_split.h"
-#include "base/strings/stringprintf.h"
-#include "base/strings/utf_string_conversions.h"
-#include "chrome/common/extensions/features/feature.h"
-#include "extensions/common/error_utils.h"
-#include "extensions/common/features/feature_provider.h"
-#include "extensions/common/install_warning.h"
-#include "extensions/common/manifest_constants.h"
-
-namespace extensions {
-
-namespace keys = manifest_keys;
-
-namespace {
-
-// Rank extension locations in a way that allows
-// Manifest::GetHigherPriorityLocation() to compare locations.
-// An extension installed from two locations will have the location
-// with the higher rank, as returned by this function. The actual
-// integer values may change, and should never be persisted.
-int GetLocationRank(Manifest::Location location) {
-  const int kInvalidRank = -1;
-  int rank = kInvalidRank;  // Will CHECK that rank is not kInvalidRank.
-
-  switch (location) {
-    // Component extensions can not be overriden by any other type.
-    case Manifest::COMPONENT:
-      rank = 7;
-      break;
-
-    // Policy controlled extensions may not be overridden by any type
-    // that is not part of chrome.
-    case Manifest::EXTERNAL_POLICY_DOWNLOAD:
-      rank = 6;
-      break;
-
-    // A developer-loaded extension should override any installed type
-    // that a user can disable. Anything specified on the command-line should
-    // override one loaded via the extensions UI.
-    case Manifest::COMMAND_LINE:
-      rank = 5;
-      break;
-
-    case Manifest::UNPACKED:
-      rank = 4;
-      break;
-
-    // The relative priority of various external sources is not important,
-    // but having some order ensures deterministic behavior.
-    case Manifest::EXTERNAL_REGISTRY:
-      rank = 3;
-      break;
-
-    case Manifest::EXTERNAL_PREF:
-      rank = 2;
-      break;
-
-    case Manifest::EXTERNAL_PREF_DOWNLOAD:
-      rank = 1;
-      break;
-
-    // User installed extensions are overridden by any external type.
-    case Manifest::INTERNAL:
-      rank = 0;
-      break;
-
-    default:
-      NOTREACHED() << "Need to add new extension location " << location;
-  }
-
-  CHECK(rank != kInvalidRank);
-  return rank;
-}
-
-}  // namespace
-
-// static
-Manifest::Location Manifest::GetHigherPriorityLocation(
-    Location loc1, Location loc2) {
-  if (loc1 == loc2)
-    return loc1;
-
-  int loc1_rank = GetLocationRank(loc1);
-  int loc2_rank = GetLocationRank(loc2);
-
-  // If two different locations have the same rank, then we can not
-  // deterministicly choose a location.
-  CHECK(loc1_rank != loc2_rank);
-
-  // Highest rank has highest priority.
-  return (loc1_rank > loc2_rank ? loc1 : loc2 );
-}
-
-Manifest::Manifest(Location location, scoped_ptr<base::DictionaryValue> value)
-    : location_(location),
-      value_(value.Pass()),
-      type_(TYPE_UNKNOWN) {
-  if (value_->HasKey(keys::kTheme)) {
-    type_ = TYPE_THEME;
-  } else if (value_->HasKey(keys::kExport)) {
-    type_ = TYPE_SHARED_MODULE;
-  } else if (value_->HasKey(keys::kApp)) {
-    if (value_->Get(keys::kWebURLs, NULL) ||
-        value_->Get(keys::kLaunchWebURL, NULL)) {
-      type_ = TYPE_HOSTED_APP;
-    } else if (value_->Get(keys::kPlatformAppBackground, NULL)) {
-      type_ = TYPE_PLATFORM_APP;
-    } else {
-      type_ = TYPE_LEGACY_PACKAGED_APP;
-    }
-  } else {
-    type_ = TYPE_EXTENSION;
-  }
-  CHECK_NE(type_, TYPE_UNKNOWN);
-}
-
-Manifest::~Manifest() {
-}
-
-bool Manifest::ValidateManifest(
-    std::string* error,
-    std::vector<InstallWarning>* warnings) const {
-  *error = "";
-
-  // Check every feature to see if its in the manifest. Note that this means
-  // we will ignore keys that are not features; we do this for forward
-  // compatibility.
-  // TODO(aa): Consider having an error here in the case of strict error
-  // checking to let developers know when they screw up.
-
-  FeatureProvider* provider = FeatureProvider::GetByName("manifest");
-  const std::vector<std::string>& feature_names =
-      provider->GetAllFeatureNames();
-  for (std::vector<std::string>::const_iterator feature_name =
-           feature_names.begin();
-       feature_name != feature_names.end(); ++feature_name) {
-    // Use Get instead of HasKey because the former uses path expansion.
-    if (!value_->Get(*feature_name, NULL))
-      continue;
-
-    Feature* feature = provider->GetFeature(*feature_name);
-    Feature::Availability result = feature->IsAvailableToManifest(
-        extension_id_, type_, Feature::ConvertLocation(location_),
-        GetManifestVersion());
-    if (!result.is_available())
-      warnings->push_back(InstallWarning(result.message(), *feature_name));
-  }
-
-  // Also generate warnings for keys that are not features.
-  for (base::DictionaryValue::Iterator it(*value_); !it.IsAtEnd();
-       it.Advance()) {
-    if (!provider->GetFeature(it.key())) {
-      warnings->push_back(InstallWarning(
-          base::StringPrintf("Unrecognized manifest key '%s'.",
-                             it.key().c_str()),
-          it.key()));
-    }
-  }
-  return true;
-}
-
-bool Manifest::HasKey(const std::string& key) const {
-  return CanAccessKey(key) && value_->HasKey(key);
-}
-
-bool Manifest::HasPath(const std::string& path) const {
-  base::Value* ignored = NULL;
-  return CanAccessPath(path) && value_->Get(path, &ignored);
-}
-
-bool Manifest::Get(
-    const std::string& path, const base::Value** out_value) const {
-  return CanAccessPath(path) && value_->Get(path, out_value);
-}
-
-bool Manifest::GetBoolean(
-    const std::string& path, bool* out_value) const {
-  return CanAccessPath(path) && value_->GetBoolean(path, out_value);
-}
-
-bool Manifest::GetInteger(
-    const std::string& path, int* out_value) const {
-  return CanAccessPath(path) && value_->GetInteger(path, out_value);
-}
-
-bool Manifest::GetString(
-    const std::string& path, std::string* out_value) const {
-  return CanAccessPath(path) && value_->GetString(path, out_value);
-}
-
-bool Manifest::GetString(
-    const std::string& path, string16* out_value) const {
-  return CanAccessPath(path) && value_->GetString(path, out_value);
-}
-
-bool Manifest::GetDictionary(
-    const std::string& path, const base::DictionaryValue** out_value) const {
-  return CanAccessPath(path) && value_->GetDictionary(path, out_value);
-}
-
-bool Manifest::GetList(
-    const std::string& path, const base::ListValue** out_value) const {
-  return CanAccessPath(path) && value_->GetList(path, out_value);
-}
-
-Manifest* Manifest::DeepCopy() const {
-  Manifest* manifest = new Manifest(
-      location_, scoped_ptr<base::DictionaryValue>(value_->DeepCopy()));
-  manifest->set_extension_id(extension_id_);
-  return manifest;
-}
-
-bool Manifest::Equals(const Manifest* other) const {
-  return other && value_->Equals(other->value());
-}
-
-int Manifest::GetManifestVersion() const {
-  // Platform apps were launched after manifest version 2 was the preferred
-  // version, so they default to that.
-  int manifest_version = type_ == TYPE_PLATFORM_APP ? 2 : 1;
-  value_->GetInteger(keys::kManifestVersion, &manifest_version);
-  return manifest_version;
-}
-
-bool Manifest::CanAccessPath(const std::string& path) const {
-  std::vector<std::string> components;
-  base::SplitString(path, '.', &components);
-  std::string key;
-  for (size_t i = 0; i < components.size(); ++i) {
-    key += components[i];
-    if (!CanAccessKey(key))
-      return false;
-    key += '.';
-  }
-  return true;
-}
-
-bool Manifest::CanAccessKey(const std::string& key) const {
-  Feature* feature = FeatureProvider::GetByName("manifest")->GetFeature(key);
-  if (!feature)
-    return true;
-
-  return feature->IsAvailableToManifest(
-      extension_id_, type_, Feature::ConvertLocation(location_),
-      GetManifestVersion()).is_available();
-}
-
-}  // namespace extensions