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/*
* Copyright (C) 2015 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.
*/
#ifndef AAPT_LINKER_REFERENCELINKER_H
#define AAPT_LINKER_REFERENCELINKER_H
#include "Resource.h"
#include "ResourceValues.h"
#include "ValueVisitor.h"
#include "link/Linkers.h"
#include "process/IResourceTableConsumer.h"
#include "process/SymbolTable.h"
#include "xml/XmlDom.h"
#include <cassert>
namespace aapt {
/**
* Resolves all references to resources in the ResourceTable and assigns them IDs.
* The ResourceTable must already have IDs assigned to each resource.
* Once the ResourceTable is processed by this linker, it is ready to be flattened.
*/
struct ReferenceLinker : public IResourceTableConsumer {
/**
* Returns true if the symbol is visible by the reference and from the callsite.
*/
static bool isSymbolVisible(const SymbolTable::Symbol& symbol, const Reference& ref,
const CallSite& callSite);
/**
* Performs name mangling and looks up the resource in the symbol table. Returns nullptr
* if the symbol was not found.
*/
static const SymbolTable::Symbol* resolveSymbol(const Reference& reference,
NameMangler* mangler, SymbolTable* symbols);
/**
* Performs name mangling and looks up the resource in the symbol table. If the symbol is
* not visible by the reference at the callsite, nullptr is returned. outError holds
* the error message.
*/
static const SymbolTable::Symbol* resolveSymbolCheckVisibility(const Reference& reference,
NameMangler* nameMangler,
SymbolTable* symbols,
CallSite* callSite,
std::string* outError);
/**
* Same as resolveSymbolCheckVisibility(), but also makes sure the symbol is an attribute.
* That is, the return value will have a non-null value for ISymbolTable::Symbol::attribute.
*/
static const SymbolTable::Symbol* resolveAttributeCheckVisibility(const Reference& reference,
NameMangler* nameMangler,
SymbolTable* symbols,
CallSite* callSite,
std::string* outError);
/**
* Resolves the attribute reference and returns an xml::AaptAttribute if successful.
* If resolution fails, outError holds the error message.
*/
static Maybe<xml::AaptAttribute> compileXmlAttribute(const Reference& reference,
NameMangler* nameMangler,
SymbolTable* symbols,
CallSite* callSite,
std::string* outError);
/**
* Writes the resource name to the DiagMessage, using the "orig_name (aka <transformed_name>)"
* syntax.
*/
static void writeResourceName(DiagMessage* outMsg, const Reference& orig,
const Reference& transformed);
/**
* Transforms the package name of the reference to the fully qualified package name using
* the xml::IPackageDeclStack, then mangles and looks up the symbol. If the symbol is visible
* to the reference at the callsite, the reference is updated with an ID.
* Returns false on failure, and an error message is logged to the IDiagnostics in the context.
*/
static bool linkReference(Reference* reference, IAaptContext* context, SymbolTable* symbols,
xml::IPackageDeclStack* decls, CallSite* callSite);
/**
* Links all references in the ResourceTable.
*/
bool consume(IAaptContext* context, ResourceTable* table) override;
};
} // namespace aapt
#endif /* AAPT_LINKER_REFERENCELINKER_H */
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