1 /*
2 * Copyright (C) 2016 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 "link/Linkers.h"
18
19 #include "ResourceTable.h"
20 #include "trace/TraceBuffer.h"
21
22 namespace aapt {
23
SelectProductToKeep(const ResourceNameRef & name,const ResourceConfigValueIter begin,const ResourceConfigValueIter end,android::IDiagnostics * diag)24 ProductFilter::ResourceConfigValueIter ProductFilter::SelectProductToKeep(
25 const ResourceNameRef& name, const ResourceConfigValueIter begin,
26 const ResourceConfigValueIter end, android::IDiagnostics* diag) {
27 ResourceConfigValueIter default_product_iter = end;
28 ResourceConfigValueIter selected_product_iter = end;
29
30 for (ResourceConfigValueIter iter = begin; iter != end; ++iter) {
31 ResourceConfigValue* config_value = iter->get();
32 if (products_.find(config_value->product) != products_.end()) {
33 if (selected_product_iter != end) {
34 // We have two possible values for this product!
35 diag->Error(android::DiagMessage(config_value->value->GetSource())
36 << "selection of product '" << config_value->product << "' for resource "
37 << name << " is ambiguous");
38
39 ResourceConfigValue* previously_selected_config_value =
40 selected_product_iter->get();
41 diag->Note(android::DiagMessage(previously_selected_config_value->value->GetSource())
42 << "product '" << previously_selected_config_value->product
43 << "' is also a candidate");
44 return end;
45 }
46
47 // Select this product.
48 selected_product_iter = iter;
49 }
50
51 if (config_value->product.empty() || config_value->product == "default") {
52 if (default_product_iter != end) {
53 // We have two possible default values.
54 diag->Error(android::DiagMessage(config_value->value->GetSource())
55 << "multiple default products defined for resource " << name);
56
57 ResourceConfigValue* previously_default_config_value =
58 default_product_iter->get();
59 diag->Note(android::DiagMessage(previously_default_config_value->value->GetSource())
60 << "default product also defined here");
61 return end;
62 }
63
64 // Mark the default.
65 default_product_iter = iter;
66 }
67 }
68
69 if (default_product_iter == end) {
70 diag->Error(android::DiagMessage() << "no default product defined for resource " << name);
71 return end;
72 }
73
74 if (selected_product_iter == end) {
75 selected_product_iter = default_product_iter;
76 }
77 return selected_product_iter;
78 }
79
Consume(IAaptContext * context,ResourceTable * table)80 bool ProductFilter::Consume(IAaptContext* context, ResourceTable* table) {
81 TRACE_NAME("ProductFilter::Consume");
82 bool error = false;
83 for (auto& pkg : table->packages) {
84 for (auto& type : pkg->types) {
85 for (auto& entry : type->entries) {
86 std::vector<std::unique_ptr<ResourceConfigValue>> new_values;
87
88 ResourceConfigValueIter iter = entry->values.begin();
89 ResourceConfigValueIter start_range_iter = iter;
90 while (iter != entry->values.end()) {
91 ++iter;
92 if (iter == entry->values.end() ||
93 (*iter)->config != (*start_range_iter)->config) {
94 // End of the array, or we saw a different config,
95 // so this must be the end of a range of products.
96 // Select the product to keep from the set of products defined.
97 ResourceNameRef name(pkg->name, type->named_type, entry->name);
98 auto value_to_keep = SelectProductToKeep(
99 name, start_range_iter, iter, context->GetDiagnostics());
100 if (value_to_keep == iter) {
101 // An error occurred, we could not pick a product.
102 error = true;
103 } else {
104 // We selected a product to keep. Move it to the new array.
105 new_values.push_back(std::move(*value_to_keep));
106 }
107
108 // Start the next range of products.
109 start_range_iter = iter;
110 }
111 }
112
113 // Now move the new values in to place.
114 entry->values = std::move(new_values);
115 }
116 }
117 }
118 return !error;
119 }
120
121 } // namespace aapt
122