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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 "android-base/macros.h"
#include "Resource.h"
#include "ResourceValues.h"
#include "link/Linkers.h"
#include "process/IResourceTableConsumer.h"
#include "process/SymbolTable.h"
#include "xml/XmlDom.h"
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.
class ReferenceLinker : public IResourceTableConsumer {
public:
ReferenceLinker() = default;
// Performs name mangling and looks up the resource in the symbol table. Uses the callsite's
// package if the reference has no package name defined (implicit).
// Returns nullptr if the symbol was not found.
static const SymbolTable::Symbol* ResolveSymbol(const Reference& reference,
const CallSite& callsite, 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.
// `out_error` holds the error message.
static const SymbolTable::Symbol* ResolveSymbolCheckVisibility(const Reference& reference,
const CallSite& callsite,
SymbolTable* symbols,
std::string* out_error);
// 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,
const CallSite& callsite,
SymbolTable* symbols,
std::string* out_error);
// 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,
const CallSite& callsite,
SymbolTable* symbols,
std::string* out_error);
// Writes the resource name to the DiagMessage, using the
// "orig_name (aka <transformed_name>)" syntax.
static void WriteResourceName(const Reference& orig, const CallSite& callsite,
const xml::IPackageDeclStack* decls, DiagMessage* out_msg);
// Same as WriteResourceName but omits the 'attr' part.
static void WriteAttributeName(const Reference& ref, const CallSite& callsite,
const xml::IPackageDeclStack* decls, DiagMessage* out_msg);
// 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(const CallSite& callsite, Reference* reference, IAaptContext* context,
SymbolTable* symbols, const xml::IPackageDeclStack* decls);
// Links all references in the ResourceTable.
bool Consume(IAaptContext* context, ResourceTable* table) override;
private:
DISALLOW_COPY_AND_ASSIGN(ReferenceLinker);
};
} // namespace aapt
#endif /* AAPT_LINKER_REFERENCELINKER_H */
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