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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/renderer/resource_bundle_source_map.h"
#include <ostream>
#include <string_view>
#include "base/containers/contains.h"
#include "base/notreached.h"
#include "extensions/renderer/static_v8_external_one_byte_string_resource.h"
#include "third_party/zlib/google/compression_utils.h"
#include "ui/base/resource/resource_bundle.h"
#include "v8/include/v8-primitive.h"
namespace extensions {
namespace {
v8::Local<v8::String> ConvertString(v8::Isolate* isolate,
std::string_view string) {
// v8 takes ownership of the StaticV8ExternalOneByteStringResource (see
// v8::String::NewExternalOneByte()).
return v8::String::NewExternalOneByte(
isolate, new StaticV8ExternalOneByteStringResource(string))
.FromMaybe(v8::Local<v8::String>());
}
} // namespace
ResourceBundleSourceMap::ResourceInfo::ResourceInfo() = default;
ResourceBundleSourceMap::ResourceInfo::ResourceInfo(int in_id) : id(in_id) {}
ResourceBundleSourceMap::ResourceInfo::ResourceInfo(ResourceInfo&& other) =
default;
ResourceBundleSourceMap::ResourceInfo::~ResourceInfo() = default;
ResourceBundleSourceMap::ResourceInfo& ResourceBundleSourceMap::ResourceInfo::
operator=(ResourceInfo&& other) = default;
ResourceBundleSourceMap::ResourceBundleSourceMap(
const ui::ResourceBundle* resource_bundle)
: resource_bundle_(resource_bundle) {
}
ResourceBundleSourceMap::~ResourceBundleSourceMap() {
}
void ResourceBundleSourceMap::RegisterSource(const char* const name,
int resource_id) {
base::AutoLock lock(lock_);
resource_map_.emplace(name, resource_id);
}
v8::Local<v8::String> ResourceBundleSourceMap::GetSource(
v8::Isolate* isolate,
const std::string& name) const {
base::AutoLock lock(lock_);
auto resource_iter = resource_map_.find(name);
if (resource_iter == resource_map_.end()) {
DUMP_WILL_BE_NOTREACHED()
<< "No module is registered with name \"" << name << "\"";
return v8::Local<v8::String>();
}
const ResourceInfo& info = resource_iter->second;
if (info.cached)
return ConvertString(isolate, *info.cached);
std::string_view resource = resource_bundle_->GetRawDataResource(info.id);
if (resource.empty()) {
DUMP_WILL_BE_NOTREACHED()
<< "Module resource registered as \"" << name << "\" not found";
return v8::Local<v8::String>();
}
bool is_gzipped = resource_bundle_->IsGzipped(info.id);
if (is_gzipped) {
info.cached = std::make_unique<std::string>();
if (!compression::GzipUncompress(resource, info.cached.get())) {
// Let |info.cached| point to an empty string, so that the next time when
// the resource is requested, the method returns an empty string directly,
// instead of trying to uncompress again.
info.cached->clear();
return v8::Local<v8::String>();
}
resource = *info.cached;
}
return ConvertString(isolate, resource);
}
bool ResourceBundleSourceMap::Contains(const std::string& name) const {
base::AutoLock lock(lock_);
return base::Contains(resource_map_, name);
}
} // namespace extensions
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