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
21 namespace aapt {
22
SelectProductToKeep(const ResourceNameRef & name,const ResourceConfigValueIter begin,const ResourceConfigValueIter end,IDiagnostics * diag)23 ProductFilter::ResourceConfigValueIter ProductFilter::SelectProductToKeep(
24 const ResourceNameRef& name, const ResourceConfigValueIter begin,
25 const ResourceConfigValueIter end, IDiagnostics* diag) {
26 ResourceConfigValueIter default_product_iter = end;
27 ResourceConfigValueIter selected_product_iter = end;
28
29 for (ResourceConfigValueIter iter = begin; iter != end; ++iter) {
30 ResourceConfigValue* config_value = iter->get();
31 if (products_.find(config_value->product) != products_.end()) {
32 if (selected_product_iter != end) {
33 // We have two possible values for this product!
34 diag->Error(DiagMessage(config_value->value->GetSource())
35 << "selection of product '" << config_value->product
36 << "' for resource " << name << " is ambiguous");
37
38 ResourceConfigValue* previously_selected_config_value =
39 selected_product_iter->get();
40 diag->Note(
41 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(DiagMessage(config_value->value->GetSource())
55 << "multiple default products defined for resource "
56 << name);
57
58 ResourceConfigValue* previously_default_config_value =
59 default_product_iter->get();
60 diag->Note(
61 DiagMessage(previously_default_config_value->value->GetSource())
62 << "default product also defined here");
63 return end;
64 }
65
66 // Mark the default.
67 default_product_iter = iter;
68 }
69 }
70
71 if (default_product_iter == end) {
72 diag->Error(DiagMessage() << "no default product defined for resource "
73 << name);
74 return end;
75 }
76
77 if (selected_product_iter == end) {
78 selected_product_iter = default_product_iter;
79 }
80 return selected_product_iter;
81 }
82
Consume(IAaptContext * context,ResourceTable * table)83 bool ProductFilter::Consume(IAaptContext* context, ResourceTable* table) {
84 bool error = false;
85 for (auto& pkg : table->packages) {
86 for (auto& type : pkg->types) {
87 for (auto& entry : type->entries) {
88 std::vector<std::unique_ptr<ResourceConfigValue>> new_values;
89
90 ResourceConfigValueIter iter = entry->values.begin();
91 ResourceConfigValueIter start_range_iter = iter;
92 while (iter != entry->values.end()) {
93 ++iter;
94 if (iter == entry->values.end() ||
95 (*iter)->config != (*start_range_iter)->config) {
96 // End of the array, or we saw a different config,
97 // so this must be the end of a range of products.
98 // Select the product to keep from the set of products defined.
99 ResourceNameRef name(pkg->name, type->type, entry->name);
100 auto value_to_keep = SelectProductToKeep(
101 name, start_range_iter, iter, context->GetDiagnostics());
102 if (value_to_keep == iter) {
103 // An error occurred, we could not pick a product.
104 error = true;
105 } else {
106 // We selected a product to keep. Move it to the new array.
107 new_values.push_back(std::move(*value_to_keep));
108 }
109
110 // Start the next range of products.
111 start_range_iter = iter;
112 }
113 }
114
115 // Now move the new values in to place.
116 entry->values = std::move(new_values);
117 }
118 }
119 }
120 return !error;
121 }
122
123 } // namespace aapt
124