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