Eric Holk | b377e51 | 2018-12-21 17:25:38 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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 "apk_layout_compiler.h" |
| 18 | #include "dex_layout_compiler.h" |
| 19 | #include "java_lang_builder.h" |
| 20 | #include "layout_validation.h" |
| 21 | #include "util.h" |
| 22 | |
| 23 | #include "androidfw/ApkAssets.h" |
| 24 | #include "androidfw/AssetManager2.h" |
| 25 | #include "androidfw/ResourceTypes.h" |
| 26 | |
| 27 | #include <iostream> |
| 28 | #include <locale> |
| 29 | |
| 30 | #include "android-base/stringprintf.h" |
| 31 | |
| 32 | namespace startop { |
| 33 | |
| 34 | using android::ResXMLParser; |
| 35 | using android::base::StringPrintf; |
| 36 | |
| 37 | class ResXmlVisitorAdapter { |
| 38 | public: |
| 39 | ResXmlVisitorAdapter(ResXMLParser* parser) : parser_{parser} {} |
| 40 | |
| 41 | template <typename Visitor> |
| 42 | void Accept(Visitor* visitor) { |
| 43 | size_t depth{0}; |
| 44 | do { |
| 45 | switch (parser_->next()) { |
| 46 | case ResXMLParser::START_DOCUMENT: |
| 47 | depth++; |
| 48 | visitor->VisitStartDocument(); |
| 49 | break; |
| 50 | case ResXMLParser::END_DOCUMENT: |
| 51 | depth--; |
| 52 | visitor->VisitEndDocument(); |
| 53 | break; |
| 54 | case ResXMLParser::START_TAG: { |
| 55 | depth++; |
| 56 | size_t name_length = 0; |
| 57 | const char16_t* name = parser_->getElementName(&name_length); |
| 58 | visitor->VisitStartTag(std::u16string{name, name_length}); |
| 59 | break; |
| 60 | } |
| 61 | case ResXMLParser::END_TAG: |
| 62 | depth--; |
| 63 | visitor->VisitEndTag(); |
| 64 | break; |
| 65 | default:; |
| 66 | } |
| 67 | } while (depth > 0 || parser_->getEventType() == ResXMLParser::FIRST_CHUNK_CODE); |
| 68 | } |
| 69 | |
| 70 | private: |
| 71 | ResXMLParser* parser_; |
| 72 | }; |
| 73 | |
| 74 | bool CanCompileLayout(ResXMLParser* parser) { |
| 75 | ResXmlVisitorAdapter adapter{parser}; |
| 76 | LayoutValidationVisitor visitor; |
| 77 | adapter.Accept(&visitor); |
| 78 | |
| 79 | return visitor.can_compile(); |
| 80 | } |
| 81 | |
Eric Holk | 0e0e7dd | 2019-01-15 10:03:46 -0800 | [diff] [blame] | 82 | namespace { |
| 83 | void CompileApkAssetsLayouts(const std::unique_ptr<const android::ApkAssets>& assets, |
| 84 | CompilationTarget target, std::ostream& target_out) { |
Eric Holk | b377e51 | 2018-12-21 17:25:38 -0800 | [diff] [blame] | 85 | android::AssetManager2 resources; |
| 86 | resources.SetApkAssets({assets.get()}); |
| 87 | |
| 88 | std::string package_name; |
| 89 | |
| 90 | // TODO: handle multiple packages better |
| 91 | bool first = true; |
| 92 | for (const auto& package : assets->GetLoadedArsc()->GetPackages()) { |
| 93 | CHECK(first); |
| 94 | package_name = package->GetPackageName(); |
| 95 | first = false; |
| 96 | } |
| 97 | |
| 98 | dex::DexBuilder dex_file; |
| 99 | dex::ClassBuilder compiled_view{ |
| 100 | dex_file.MakeClass(StringPrintf("%s.CompiledView", package_name.c_str()))}; |
| 101 | std::vector<dex::MethodBuilder> methods; |
| 102 | |
| 103 | assets->ForEachFile("res/", [&](const android::StringPiece& s, android::FileType) { |
| 104 | if (s == "layout") { |
| 105 | auto path = StringPrintf("res/%s/", s.to_string().c_str()); |
| 106 | assets->ForEachFile(path, [&](const android::StringPiece& layout_file, android::FileType) { |
| 107 | auto layout_path = StringPrintf("%s%s", path.c_str(), layout_file.to_string().c_str()); |
| 108 | android::ApkAssetsCookie cookie = android::kInvalidCookie; |
| 109 | auto asset = resources.OpenNonAsset(layout_path, android::Asset::ACCESS_RANDOM, &cookie); |
| 110 | CHECK(asset); |
| 111 | CHECK(android::kInvalidCookie != cookie); |
| 112 | const auto dynamic_ref_table = resources.GetDynamicRefTableForCookie(cookie); |
| 113 | CHECK(nullptr != dynamic_ref_table); |
| 114 | android::ResXMLTree xml_tree{dynamic_ref_table}; |
| 115 | xml_tree.setTo(asset->getBuffer(/*wordAligned=*/true), |
| 116 | asset->getLength(), |
| 117 | /*copy_data=*/true); |
| 118 | android::ResXMLParser parser{xml_tree}; |
| 119 | parser.restart(); |
| 120 | if (CanCompileLayout(&parser)) { |
| 121 | parser.restart(); |
| 122 | const std::string layout_name = startop::util::FindLayoutNameFromFilename(layout_path); |
| 123 | ResXmlVisitorAdapter adapter{&parser}; |
| 124 | switch (target) { |
| 125 | case CompilationTarget::kDex: { |
| 126 | methods.push_back(compiled_view.CreateMethod( |
| 127 | layout_name, |
| 128 | dex::Prototype{dex::TypeDescriptor::FromClassname("android.view.View"), |
| 129 | dex::TypeDescriptor::FromClassname("android.content.Context"), |
| 130 | dex::TypeDescriptor::Int()})); |
| 131 | DexViewBuilder builder(&methods.back()); |
| 132 | builder.Start(); |
| 133 | LayoutCompilerVisitor visitor{&builder}; |
| 134 | adapter.Accept(&visitor); |
| 135 | builder.Finish(); |
| 136 | methods.back().Encode(); |
| 137 | break; |
| 138 | } |
| 139 | case CompilationTarget::kJavaLanguage: { |
| 140 | JavaLangViewBuilder builder{package_name, layout_name, target_out}; |
| 141 | builder.Start(); |
| 142 | LayoutCompilerVisitor visitor{&builder}; |
| 143 | adapter.Accept(&visitor); |
| 144 | builder.Finish(); |
| 145 | break; |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | }); |
| 150 | } |
| 151 | }); |
| 152 | |
| 153 | if (target == CompilationTarget::kDex) { |
| 154 | slicer::MemView image{dex_file.CreateImage()}; |
| 155 | target_out.write(image.ptr<const char>(), image.size()); |
| 156 | } |
| 157 | } |
Eric Holk | 0e0e7dd | 2019-01-15 10:03:46 -0800 | [diff] [blame] | 158 | } // namespace |
| 159 | |
| 160 | void CompileApkLayouts(const std::string& filename, CompilationTarget target, |
| 161 | std::ostream& target_out) { |
| 162 | auto assets = android::ApkAssets::Load(filename); |
| 163 | CompileApkAssetsLayouts(assets, target, target_out); |
| 164 | } |
| 165 | |
| 166 | void CompileApkLayoutsFd(android::base::unique_fd fd, CompilationTarget target, |
| 167 | std::ostream& target_out) { |
| 168 | constexpr const char* friendly_name{"viewcompiler assets"}; |
| 169 | auto assets = android::ApkAssets::LoadFromFd( |
| 170 | std::move(fd), friendly_name, /*system=*/false, /*force_shared_lib=*/false); |
| 171 | CompileApkAssetsLayouts(assets, target, target_out); |
| 172 | } |
Eric Holk | b377e51 | 2018-12-21 17:25:38 -0800 | [diff] [blame] | 173 | |
| 174 | } // namespace startop |