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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 "text/Unicode.h"
     25 #include "trace/TraceBuffer.h"
     26 #include "xml/XmlDom.h"
     27 
     28 namespace aapt {
     29 
     30 namespace {
     31 
     32 static bool cmp_name(const SourcedResourceName& a, const ResourceNameRef& b) {
     33   return a.name < b;
     34 }
     35 
     36 struct IdCollector : public xml::Visitor {
     37  public:
     38   using xml::Visitor::Visit;
     39 
     40   explicit IdCollector(std::vector<SourcedResourceName>* out_symbols,
     41                        SourcePathDiagnostics* source_diag) : out_symbols_(out_symbols),
     42                                                              source_diag_(source_diag) {}
     43 
     44   void Visit(xml::Element* element) override {
     45     for (xml::Attribute& attr : element->attributes) {
     46       ResourceNameRef name;
     47       bool create = false;
     48       if (ResourceUtils::ParseReference(attr.value, &name, &create, nullptr)) {
     49         if (create && name.type == ResourceType::kId) {
     50           if (!text::IsValidResourceEntryName(name.entry)) {
     51             source_diag_->Error(DiagMessage(element->line_number)
     52                                    << "id '" << name << "' has an invalid entry name");
     53           } else {
     54             auto iter = std::lower_bound(out_symbols_->begin(),
     55                                          out_symbols_->end(), name, cmp_name);
     56             if (iter == out_symbols_->end() || iter->name != name) {
     57               out_symbols_->insert(iter, SourcedResourceName{name.ToResourceName(),
     58                                                              element->line_number});
     59             }
     60           }
     61         }
     62       }
     63     }
     64 
     65     xml::Visitor::Visit(element);
     66   }
     67 
     68  private:
     69   std::vector<SourcedResourceName>* out_symbols_;
     70   SourcePathDiagnostics* source_diag_;
     71 };
     72 
     73 }  // namespace
     74 
     75 bool XmlIdCollector::Consume(IAaptContext* context, xml::XmlResource* xmlRes) {
     76   TRACE_CALL();
     77   xmlRes->file.exported_symbols.clear();
     78   SourcePathDiagnostics source_diag(xmlRes->file.source, context->GetDiagnostics());
     79   IdCollector collector(&xmlRes->file.exported_symbols, &source_diag);
     80   xmlRes->root->Accept(&collector);
     81   return !source_diag.HadError();
     82 }
     83 
     84 }  // namespace aapt
     85