Flutter Engine
font_asset_provider.cc
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1 /*
2  * Copyright 2018 Google Inc.
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 <algorithm>
18 #include <string>
19 
21 
22 namespace txt {
23 
24 // Return a canonicalized version of a family name that is suitable for
25 // matching.
26 std::string FontAssetProvider::CanonicalFamilyName(std::string family_name) {
27  std::string result(family_name.length(), 0);
28 
29  // Convert ASCII characters to lower case.
30  std::transform(family_name.begin(), family_name.end(), result.begin(),
31  [](char c) { return (c & 0x80) ? c : ::tolower(c); });
32 
33  return result;
34 }
35 
36 } // namespace txt
static std::string CanonicalFamilyName(std::string family_name)