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,IDiagnostics * diag)24 ProductFilter::ResourceConfigValueIter ProductFilter::SelectProductToKeep(
25 const ResourceNameRef& name, const ResourceConfigValueIter begin,
26 const ResourceConfigValueIter end, 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(DiagMessage(config_value->value->GetSource())
36 << "selection of product '" << config_value->product
37 << "' for resource " << name << " is ambiguous");
38
39 ResourceConfigValue* previously_selected_config_value =
40 selected_product_iter->get();
41 diag->Note(
42 DiagMessage(previously_selected_config_value->value->GetSource())
43 << "product '" << previously_selected_config_value->product
44 << "' is also a candidate");
45 return end;
46 }
47
48 // Select this product.
49 selected_product_iter = iter;
50 }
51
52 if (config_value->product.empty() || config_value->product == "default") {
53 if (default_product_iter != end) {
54 // We have two possible default values.
55 diag->Error(DiagMessage(config_value->value->GetSource())
56 << "multiple default products defined for resource "
57 << name);
58
59 ResourceConfigValue* previously_default_config_value =
60 default_product_iter->get();
61 diag->Note(
62 DiagMessage(previously_default_config_value->value->GetSource())
63 << "default product also defined here");
64 return end;
65 }
66
67 // Mark the default.
68 default_product_iter = iter;
69 }
70 }
71
72 if (default_product_iter == end) {
73 diag->Error(DiagMessage() << "no default product defined for resource "
74 << name);
75 return end;
76 }
77
78 if (selected_product_iter == end) {
79 selected_product_iter = default_product_iter;
80 }
81 return selected_product_iter;
82 }
83
Consume(IAaptContext * context,ResourceTable * table)84 bool ProductFilter::Consume(IAaptContext* context, ResourceTable* table) {
85 TRACE_NAME("ProductFilter::Consume");
86 bool error = false;
87 for (auto& pkg : table->packages) {
88 for (auto& type : pkg->types) {
89 for (auto& entry : type->entries) {
90 std::vector<std::unique_ptr<ResourceConfigValue>> new_values;
91
92 ResourceConfigValueIter iter = entry->values.begin();
93 ResourceConfigValueIter start_range_iter = iter;
94 while (iter != entry->values.end()) {
95 ++iter;
96 if (iter == entry->values.end() ||
97 (*iter)->config != (*start_range_iter)->config) {
98 // End of the array, or we saw a different config,
99 // so this must be the end of a range of products.
100 // Select the product to keep from the set of products defined.
101 ResourceNameRef name(pkg->name, type->type, entry->name);
102 auto value_to_keep = SelectProductToKeep(
103 name, start_range_iter, iter, context->GetDiagnostics());
104 if (value_to_keep == iter) {
105 // An error occurred, we could not pick a product.
106 error = true;
107 } else {
108 // We selected a product to keep. Move it to the new array.
109 new_values.push_back(std::move(*value_to_keep));
110 }
111
112 // Start the next range of products.
113 start_range_iter = iter;
114 }
115 }
116
117 // Now move the new values in to place.
118 entry->values = std::move(new_values);
119 }
120 }
121 }
122 return !error;
123 }
124
125 } // namespace aapt
126