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149 lines
5.3 KiB
149 lines
5.3 KiB
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef AAPT_LINKER_LINKERS_H
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#define AAPT_LINKER_LINKERS_H
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#include <set>
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#include <unordered_set>
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#include "android-base/macros.h"
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#include "androidfw/ConfigDescription.h"
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#include "androidfw/StringPiece.h"
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#include "Resource.h"
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#include "SdkConstants.h"
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#include "process/IResourceTableConsumer.h"
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#include "xml/XmlDom.h"
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namespace aapt {
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class ResourceTable;
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class ResourceEntry;
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// Defines the context in which a resource value is defined. Most resources are defined with the
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// implicit package name of their compilation context. Understanding the package name of a resource
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// allows to determine visibility of other symbols which may or may not have their packages defined.
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struct CallSite {
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std::string package;
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};
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// Determines whether a versioned resource should be created. If a versioned resource already
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// exists, it takes precedence.
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bool ShouldGenerateVersionedResource(const ResourceEntry* entry,
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const android::ConfigDescription& config,
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const ApiVersion sdk_version_to_generate);
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// Finds the next largest ApiVersion of the config which is identical to the given config except
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// for sdkVersion.
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ApiVersion FindNextApiVersionForConfig(const ResourceEntry* entry,
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const android::ConfigDescription& config);
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class AutoVersioner : public IResourceTableConsumer {
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public:
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AutoVersioner() = default;
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bool Consume(IAaptContext* context, ResourceTable* table) override;
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private:
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DISALLOW_COPY_AND_ASSIGN(AutoVersioner);
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};
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// If any attribute resource values are defined as public, this consumer will move all private
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// attribute resource values to a private ^private-attr type, avoiding backwards compatibility
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// issues with new apps running on old platforms.
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//
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// The Android platform ignores resource attributes it doesn't recognize, so an app developer can
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// use new attributes in their layout XML files without worrying about versioning. This assumption
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// actually breaks on older platforms. OEMs may add private attributes that are used internally.
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// AAPT originally assigned all private attributes IDs immediately proceeding the public attributes'
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// IDs.
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//
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// This means that on a newer Android platform, an ID previously assigned to a private attribute
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// may end up assigned to a public attribute.
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//
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// App developers assume using the newer attribute is safe on older platforms because it will
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// be ignored. Instead, the platform thinks the new attribute is an older, private attribute and
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// will interpret it as such. This leads to unintended styling and exceptions thrown due to
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// unexpected types.
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//
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// By moving the private attributes to a completely different type, this ID conflict will never
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// occur.
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class PrivateAttributeMover : public IResourceTableConsumer {
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public:
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PrivateAttributeMover() = default;
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bool Consume(IAaptContext* context, ResourceTable* table) override;
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private:
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DISALLOW_COPY_AND_ASSIGN(PrivateAttributeMover);
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};
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class ResourceConfigValue;
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class ProductFilter : public IResourceTableConsumer {
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public:
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using ResourceConfigValueIter = std::vector<std::unique_ptr<ResourceConfigValue>>::iterator;
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explicit ProductFilter(std::unordered_set<std::string> products) : products_(products) {
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}
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ResourceConfigValueIter SelectProductToKeep(
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const ResourceNameRef& name, const ResourceConfigValueIter begin,
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const ResourceConfigValueIter end, IDiagnostics* diag);
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bool Consume(IAaptContext* context, ResourceTable* table) override;
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private:
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DISALLOW_COPY_AND_ASSIGN(ProductFilter);
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std::unordered_set<std::string> products_;
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};
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// Removes namespace nodes and URI information from the XmlResource.
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//
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// Once an XmlResource is processed by this consumer, it is no longer able to have its attributes
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// parsed. As such, this XmlResource must have already been processed by XmlReferenceLinker.
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class XmlNamespaceRemover : public IXmlResourceConsumer {
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public:
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explicit XmlNamespaceRemover(bool keep_uris = false) : keep_uris_(keep_uris){};
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bool Consume(IAaptContext* context, xml::XmlResource* resource) override;
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private:
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DISALLOW_COPY_AND_ASSIGN(XmlNamespaceRemover);
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bool keep_uris_;
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};
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// Resolves attributes in the XmlResource and compiles string values to resource values.
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// Once an XmlResource is processed by this linker, it is ready to be flattened.
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class XmlReferenceLinker : public IXmlResourceConsumer {
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public:
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explicit XmlReferenceLinker(ResourceTable* table) : table_(table) {
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}
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bool Consume(IAaptContext* context, xml::XmlResource* resource) override;
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private:
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DISALLOW_COPY_AND_ASSIGN(XmlReferenceLinker);
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ResourceTable* table_;
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};
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} // namespace aapt
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#endif /* AAPT_LINKER_LINKERS_H */
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