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// Copyright 2020 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 "weblayer/browser/android/resource_mapper.h"
#include <map>
#include "base/android/jni_android.h"
#include "base/android/jni_array.h"
#include "base/check_op.h"
#include "base/no_destructor.h"
#include "base/notreached.h"
#include "components/resources/android/theme_resources.h"
#include "weblayer/browser/java/jni/ResourceMapper_jni.h"
namespace weblayer {
namespace {
using ResourceMap = std::map<int, int>;
ResourceMap* GetIdMap() {
static base::NoDestructor<ResourceMap> id_map;
return id_map.get();
}
// Create the mapping. IDs start at 0 to correspond to the array that gets
// built in the corresponding ResourceID Java class.
void ConstructMap() {
DCHECK(GetIdMap()->empty());
JNIEnv* env = base::android::AttachCurrentThread();
base::android::ScopedJavaLocalRef<jintArray> java_id_array =
Java_ResourceMapper_getResourceIdList(env);
std::vector<int> resource_id_list;
base::android::JavaIntArrayToIntVector(env, java_id_array, &resource_id_list);
size_t next_id = 0;
#define LINK_RESOURCE_ID(c_id, java_id) \
(*GetIdMap())[c_id] = resource_id_list[next_id++];
#define DECLARE_RESOURCE_ID(c_id, java_id) \
(*GetIdMap())[c_id] = resource_id_list[next_id++];
#include "components/resources/android/blocked_content_resource_id.h"
#include "components/resources/android/page_info_resource_id.h"
#include "components/resources/android/permissions_resource_id.h"
#undef LINK_RESOURCE_ID
#undef DECLARE_RESOURCE_ID
// Make sure ID list sizes match up.
DCHECK_EQ(next_id, resource_id_list.size());
}
} // namespace
int MapToJavaDrawableId(int resource_id) {
if (GetIdMap()->empty()) {
ConstructMap();
}
ResourceMap::iterator iterator = GetIdMap()->find(resource_id);
if (iterator != GetIdMap()->end()) {
return iterator->second;
}
// The resource couldn't be found.
// If you've landed here, please ensure that the header that declares the
// mapping of your native resource to Java resource is listed both in
// ResourceId.tempalate and in this file, next to other *resource_id.h
// headers.
NOTREACHED();
return 0;
}
} // namespace weblayer
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