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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "link/ResourceExcluder.h"
#include <algorithm>
#include "DominatorTree.h"
#include "ResourceTable.h"
#include "trace/TraceBuffer.h"
using android::ConfigDescription;
namespace aapt {
namespace {
void RemoveIfExcluded(std::set<std::pair<ConfigDescription, int>>& excluded_configs_,
IAaptContext* context,
ResourceEntry* entry,
ResourceConfigValue* value) {
const ConfigDescription& config = value->config;
// If this entry is a default, ignore
if (config == ConfigDescription::DefaultConfig()) {
return;
}
for (auto& excluded_pair : excluded_configs_) {
const ConfigDescription& excluded_config = excluded_pair.first;
const int& excluded_diff = excluded_pair.second;
// Check whether config contains all flags in excluded config
int node_diff = config.diff(excluded_config);
int masked_diff = excluded_diff & node_diff;
if (masked_diff == 0) {
if (context->IsVerbose()) {
context->GetDiagnostics()->Note(
DiagMessage(value->value->GetSource())
<< "excluded resource \""
<< entry->name
<< "\" with config "
<< config.toString());
}
value->value = {};
return;
}
}
}
} // namespace
bool ResourceExcluder::Consume(IAaptContext* context, ResourceTable* table) {
TRACE_NAME("ResourceExcluder::Consume");
for (auto& package : table->packages) {
for (auto& type : package->types) {
for (auto& entry : type->entries) {
for (auto& value : entry->values) {
RemoveIfExcluded(excluded_configs_, context, entry.get(), value.get());
}
// Erase the values that were removed.
entry->values.erase(
std::remove_if(
entry->values.begin(), entry->values.end(),
[](const std::unique_ptr<ResourceConfigValue>& val) -> bool {
return val == nullptr || val->value == nullptr;
}),
entry->values.end());
}
}
}
return true;
}
} // namespace aapt
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