1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ui/gfx/platform_font_ios.h"
6
7#import <UIKit/UIKit.h>
8
9#include <cmath>
10
11#include "base/basictypes.h"
12#include "base/strings/sys_string_conversions.h"
13#include "base/strings/utf_string_conversions.h"
14#include "ui/gfx/font.h"
15#include "ui/gfx/font_render_params.h"
16#include "ui/ios/NSString+CrStringDrawing.h"
17
18namespace gfx {
19
20////////////////////////////////////////////////////////////////////////////////
21// PlatformFontIOS, public:
22
23PlatformFontIOS::PlatformFontIOS() {
24  font_size_ = [UIFont systemFontSize];
25  style_ = gfx::Font::NORMAL;
26  UIFont* system_font = [UIFont systemFontOfSize:font_size_];
27  font_name_ = base::SysNSStringToUTF8([system_font fontName]);
28  CalculateMetrics();
29}
30
31PlatformFontIOS::PlatformFontIOS(NativeFont native_font) {
32  std::string font_name = base::SysNSStringToUTF8([native_font fontName]);
33  InitWithNameSizeAndStyle(font_name,
34                           [native_font pointSize],
35                           gfx::Font::NORMAL);
36}
37
38PlatformFontIOS::PlatformFontIOS(const std::string& font_name,
39                                 int font_size) {
40  InitWithNameSizeAndStyle(font_name, font_size, gfx::Font::NORMAL);
41}
42
43////////////////////////////////////////////////////////////////////////////////
44// PlatformFontIOS, PlatformFont implementation:
45
46Font PlatformFontIOS::DeriveFont(int size_delta, int style) const {
47  return Font(new PlatformFontIOS(font_name_, font_size_ + size_delta, style));
48}
49
50int PlatformFontIOS::GetHeight() const {
51  return height_;
52}
53
54int PlatformFontIOS::GetBaseline() const {
55  return ascent_;
56}
57
58int PlatformFontIOS::GetCapHeight() const {
59  return cap_height_;
60}
61
62int PlatformFontIOS::GetExpectedTextWidth(int length) const {
63  return length * average_width_;
64}
65
66int PlatformFontIOS::GetStyle() const {
67  return style_;
68}
69
70std::string PlatformFontIOS::GetFontName() const {
71  return font_name_;
72}
73
74std::string PlatformFontIOS::GetActualFontNameForTesting() const {
75  return base::SysNSStringToUTF8([GetNativeFont() familyName]);
76}
77
78int PlatformFontIOS::GetFontSize() const {
79  return font_size_;
80}
81
82const FontRenderParams& PlatformFontIOS::GetFontRenderParams() const {
83  NOTIMPLEMENTED();
84  static FontRenderParams params;
85  return params;
86}
87
88NativeFont PlatformFontIOS::GetNativeFont() const {
89  return [UIFont fontWithName:base::SysUTF8ToNSString(font_name_)
90                         size:font_size_];
91}
92
93////////////////////////////////////////////////////////////////////////////////
94// PlatformFontIOS, private:
95
96PlatformFontIOS::PlatformFontIOS(const std::string& font_name,
97                                 int font_size,
98                                 int style) {
99  InitWithNameSizeAndStyle(font_name, font_size, style);
100}
101
102void PlatformFontIOS::InitWithNameSizeAndStyle(const std::string& font_name,
103                                               int font_size,
104                                               int style) {
105  font_name_ = font_name;
106  font_size_ = font_size;
107  style_ = style;
108  CalculateMetrics();
109}
110
111void PlatformFontIOS::CalculateMetrics() {
112  UIFont* font = GetNativeFont();
113  height_ = font.lineHeight;
114  ascent_ = font.ascender;
115  cap_height_ = font.capHeight;
116  average_width_ = [@"x" cr_sizeWithFont:font].width;
117}
118
119////////////////////////////////////////////////////////////////////////////////
120// PlatformFont, public:
121
122// static
123PlatformFont* PlatformFont::CreateDefault() {
124  return new PlatformFontIOS;
125}
126
127// static
128PlatformFont* PlatformFont::CreateFromNativeFont(NativeFont native_font) {
129  return new PlatformFontIOS(native_font);
130}
131
132// static
133PlatformFont* PlatformFont::CreateFromNameAndSize(const std::string& font_name,
134                                                  int font_size) {
135  return new PlatformFontIOS(font_name, font_size);
136}
137
138}  // namespace gfx
139