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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 "ResourceUtils.h"
     18 #include "ResourceValues.h"
     19 #include "compile/XmlIdCollector.h"
     20 #include "xml/XmlDom.h"
     21 
     22 #include <algorithm>
     23 #include <vector>
     24 
     25 namespace aapt {
     26 
     27 namespace {
     28 
     29 static bool cmpName(const SourcedResourceName& a, const ResourceNameRef& b) {
     30     return a.name < b;
     31 }
     32 
     33 struct IdCollector : public xml::Visitor {
     34     using xml::Visitor::visit;
     35 
     36     std::vector<SourcedResourceName>* mOutSymbols;
     37 
     38     IdCollector(std::vector<SourcedResourceName>* outSymbols) : mOutSymbols(outSymbols) {
     39     }
     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::tryParseReference(attr.value, &name, &create, nullptr)) {
     46                 if (create && name.type == ResourceType::kId) {
     47                     auto iter = std::lower_bound(mOutSymbols->begin(), mOutSymbols->end(),
     48                                                  name, cmpName);
     49                     if (iter == mOutSymbols->end() || iter->name != name) {
     50                         mOutSymbols->insert(iter, SourcedResourceName{ name.toResourceName(),
     51                                                                        element->lineNumber });
     52                     }
     53                 }
     54             }
     55         }
     56 
     57         xml::Visitor::visit(element);
     58     }
     59 };
     60 
     61 } // namespace
     62 
     63 bool XmlIdCollector::consume(IAaptContext* context, xml::XmlResource* xmlRes) {
     64     xmlRes->file.exportedSymbols.clear();
     65     IdCollector collector(&xmlRes->file.exportedSymbols);
     66     xmlRes->root->accept(&collector);
     67     return true;
     68 }
     69 
     70 } // namespace aapt
     71