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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "compile/XmlIdCollector.h"
     18 
     19 #include <algorithm>
     20 #include <vector>
     21 
     22 #include "ResourceUtils.h"
     23 #include "ResourceValues.h"
     24 #include "xml/XmlDom.h"
     25 
     26 namespace aapt {
     27 
     28 namespace {
     29 
     30 static bool cmp_name(const SourcedResourceName& a, const ResourceNameRef& b) {
     31   return a.name < b;
     32 }
     33 
     34 struct IdCollector : public xml::Visitor {
     35  public:
     36   using xml::Visitor::Visit;
     37 
     38   explicit IdCollector(std::vector<SourcedResourceName>* out_symbols)
     39       : out_symbols_(out_symbols) {}
     40 
     41   void Visit(xml::Element* element) override {
     42     for (xml::Attribute& attr : element->attributes) {
     43       ResourceNameRef name;
     44       bool create = false;
     45       if (ResourceUtils::ParseReference(attr.value, &name, &create, nullptr)) {
     46         if (create && name.type == ResourceType::kId) {
     47           auto iter = std::lower_bound(out_symbols_->begin(),
     48                                        out_symbols_->end(), name, cmp_name);
     49           if (iter == out_symbols_->end() || iter->name != name) {
     50             out_symbols_->insert(iter,
     51                                  SourcedResourceName{name.ToResourceName(),
     52                                                      element->line_number});
     53           }
     54         }
     55       }
     56     }
     57 
     58     xml::Visitor::Visit(element);
     59   }
     60 
     61  private:
     62   std::vector<SourcedResourceName>* out_symbols_;
     63 };
     64 
     65 }  // namespace
     66 
     67 bool XmlIdCollector::Consume(IAaptContext* context, xml::XmlResource* xmlRes) {
     68   xmlRes->file.exported_symbols.clear();
     69   IdCollector collector(&xmlRes->file.exported_symbols);
     70   xmlRes->root->Accept(&collector);
     71   return true;
     72 }
     73 
     74 }  // namespace aapt
     75