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#ifndef TXT_TYPEFACE_FONT_ASSET_PROVIDER_H_
18#define TXT_TYPEFACE_FONT_ASSET_PROVIDER_H_
19
20#include <string>
21#include <unordered_map>
22#include <vector>
23
24#include "flutter/fml/macros.h"
25#include "third_party/skia/include/core/SkFontMgr.h"
26#include "txt/font_asset_provider.h"
27
28namespace txt {
29
30class TypefaceFontStyleSet : public SkFontStyleSet {
31 public:
32 TypefaceFontStyleSet();
33
34 ~TypefaceFontStyleSet() override;
35
36 void registerTypeface(sk_sp<SkTypeface> typeface);
37
38 // |SkFontStyleSet|
39 int count() override;
40
41 // |SkFontStyleSet|
42 void getStyle(int index, SkFontStyle* style, SkString* name) override;
43
44 // |SkFontStyleSet|
45 SkTypeface* createTypeface(int index) override;
46
47 // |SkFontStyleSet|
48 SkTypeface* matchStyle(const SkFontStyle& pattern) override;
49
50 private:
51 std::vector<sk_sp<SkTypeface>> typefaces_;
52
53 FML_DISALLOW_COPY_AND_ASSIGN(TypefaceFontStyleSet);
54};
55
56class TypefaceFontAssetProvider : public FontAssetProvider {
57 public:
58 TypefaceFontAssetProvider();
59 ~TypefaceFontAssetProvider() override;
60
61 void RegisterTypeface(sk_sp<SkTypeface> typeface);
62
63 void RegisterTypeface(sk_sp<SkTypeface> typeface,
64 std::string family_name_alias);
65
66 // |FontAssetProvider|
67 size_t GetFamilyCount() const override;
68
69 // |FontAssetProvider|
70 std::string GetFamilyName(int index) const override;
71
72 // |FontAssetProvider|
73 SkFontStyleSet* MatchFamily(const std::string& family_name) override;
74
75 private:
76 std::unordered_map<std::string, sk_sp<TypefaceFontStyleSet>>
77 registered_families_;
78 std::vector<std::string> family_names_;
79
80 FML_DISALLOW_COPY_AND_ASSIGN(TypefaceFontAssetProvider);
81};
82
83} // namespace txt
84
85#endif // TXT_TYPEFACE_FONT_ASSET_PROVIDER_H_
86