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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_RESOURCEUTILS_H
#define AAPT_RESOURCEUTILS_H
#include <functional>
#include <memory>
#include "NameMangler.h"
#include "Resource.h"
#include "ResourceValues.h"
#include "util/StringPiece.h"
namespace aapt {
namespace ResourceUtils {
/*
* Extracts the package, type, and name from a string of the format:
*
* [package:]type/name
*
* where the package can be empty. Validation must be performed on each
* individual extracted piece to verify that the pieces are valid.
* Returns false if there was no package but a ':' was present.
*/
bool ExtractResourceName(const StringPiece& str, StringPiece* out_package,
StringPiece* out_type, StringPiece* out_entry);
/**
* Returns true if the string was parsed as a resource name
* ([*][package:]type/name), with
* `out_resource` set to the parsed resource name and `out_private` set to true
* if a '*' prefix was present.
*/
bool ParseResourceName(const StringPiece& str, ResourceNameRef* out_resource,
bool* out_private = nullptr);
/*
* Returns true if the string was parsed as a reference
* (@[+][package:]type/name), with
* `out_reference` set to the parsed reference.
*
* If '+' was present in the reference, `out_create` is set to true.
* If '*' was present in the reference, `out_private` is set to true.
*/
bool ParseReference(const StringPiece& str, ResourceNameRef* out_reference,
bool* out_create = nullptr, bool* out_private = nullptr);
/*
* Returns true if the string is in the form of a resource reference
* (@[+][package:]type/name).
*/
bool IsReference(const StringPiece& str);
/*
* Returns true if the string was parsed as an attribute reference
* (?[package:][type/]name),
* with `out_reference` set to the parsed reference.
*/
bool ParseAttributeReference(const StringPiece& str,
ResourceNameRef* out_reference);
/**
* Returns true if the string is in the form of an attribute
* reference(?[package:][type/]name).
*/
bool IsAttributeReference(const StringPiece& str);
/**
* Convert an android::ResTable::resource_name to an aapt::ResourceName struct.
*/
Maybe<ResourceName> ToResourceName(
const android::ResTable::resource_name& name);
/**
* Returns a boolean value if the string is equal to TRUE, true, True, FALSE,
* false, or False.
*/
Maybe<bool> ParseBool(const StringPiece& str);
/**
* Returns a uint32_t if the string is an integer.
*/
Maybe<uint32_t> ParseInt(const StringPiece& str);
/**
* Returns an ID if it the string represented a valid ID.
*/
Maybe<ResourceId> ParseResourceId(const StringPiece& str);
/**
* Parses an SDK version, which can be an integer, or a letter from A-Z.
*/
Maybe<int> ParseSdkVersion(const StringPiece& str);
/*
* Returns a Reference, or None Maybe instance if the string `str` was parsed as
* a
* valid reference to a style.
* The format for a style parent is slightly more flexible than a normal
* reference:
*
* @[package:]style/<entry> or
* ?[package:]style/<entry> or
* <package>:[style/]<entry>
*/
Maybe<Reference> ParseStyleParentReference(const StringPiece& str,
std::string* out_error);
/*
* Returns a Reference if the string `str` was parsed as a valid XML attribute
* name.
* The valid format for an XML attribute name is:
*
* package:entry
*/
Maybe<Reference> ParseXmlAttributeName(const StringPiece& str);
/*
* Returns a Reference object if the string was parsed as a resource or
* attribute reference,
* ( @[+][package:]type/name | ?[package:]type/name ) setting outCreate to true
* if
* the '+' was present in the string.
*/
std::unique_ptr<Reference> TryParseReference(const StringPiece& str,
bool* out_create = nullptr);
/*
* Returns a BinaryPrimitve object representing @null or @empty if the string
* was parsed as one.
*/
std::unique_ptr<BinaryPrimitive> TryParseNullOrEmpty(const StringPiece& str);
/*
* Returns a BinaryPrimitve object representing a color if the string was parsed
* as one.
*/
std::unique_ptr<BinaryPrimitive> TryParseColor(const StringPiece& str);
/*
* Returns a BinaryPrimitve object representing a boolean if the string was
* parsed as one.
*/
std::unique_ptr<BinaryPrimitive> TryParseBool(const StringPiece& str);
/*
* Returns a BinaryPrimitve object representing an integer if the string was
* parsed as one.
*/
std::unique_ptr<BinaryPrimitive> TryParseInt(const StringPiece& str);
/*
* Returns a BinaryPrimitve object representing a floating point number
* (float, dimension, etc) if the string was parsed as one.
*/
std::unique_ptr<BinaryPrimitive> TryParseFloat(const StringPiece& str);
/*
* Returns a BinaryPrimitve object representing an enum symbol if the string was
* parsed as one.
*/
std::unique_ptr<BinaryPrimitive> TryParseEnumSymbol(const Attribute* enum_attr,
const StringPiece& str);
/*
* Returns a BinaryPrimitve object representing a flag symbol if the string was
* parsed as one.
*/
std::unique_ptr<BinaryPrimitive> TryParseFlagSymbol(const Attribute* enum_attr,
const StringPiece& str);
/*
* Try to convert a string to an Item for the given attribute. The attribute
* will
* restrict what values the string can be converted to.
* The callback function on_create_reference is called when the parsed item is a
* reference to an ID that must be created (@+id/foo).
*/
std::unique_ptr<Item> TryParseItemForAttribute(
const StringPiece& value, const Attribute* attr,
const std::function<void(const ResourceName&)>& on_create_reference = {});
std::unique_ptr<Item> TryParseItemForAttribute(
const StringPiece& value, uint32_t type_mask,
const std::function<void(const ResourceName&)>& on_create_reference = {});
uint32_t AndroidTypeToAttributeTypeMask(uint16_t type);
/**
* Returns a string path suitable for use within an APK. The path will look
* like:
*
* res/type[-config]/<name>.<ext>
*
* Then name may be mangled if a NameMangler is supplied (can be nullptr) and
* the package
* requires mangling.
*/
std::string BuildResourceFileName(const ResourceFile& res_file,
const NameMangler* mangler = nullptr);
} // namespace ResourceUtils
} // namespace aapt
#endif /* AAPT_RESOURCEUTILS_H */