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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/platform_font_ios.h"
#import <UIKit/UIKit.h>
#include "base/basictypes.h"
#include "base/sys_string_conversions.h"
#include "base/utf_string_conversions.h"
#include "ui/gfx/font.h"
namespace gfx {
////////////////////////////////////////////////////////////////////////////////
// PlatformFontIOS, public:
PlatformFontIOS::PlatformFontIOS() {
font_size_ = [UIFont systemFontSize];
style_ = gfx::Font::NORMAL;
UIFont* system_font = [UIFont systemFontOfSize:font_size_];
font_name_ = base::SysNSStringToUTF8([system_font fontName]);
CalculateMetrics();
}
PlatformFontIOS::PlatformFontIOS(NativeFont native_font) {
std::string font_name = base::SysNSStringToUTF8([native_font fontName]);
InitWithNameSizeAndStyle(font_name,
[native_font pointSize],
gfx::Font::NORMAL);
}
PlatformFontIOS::PlatformFontIOS(const std::string& font_name,
int font_size) {
InitWithNameSizeAndStyle(font_name, font_size, gfx::Font::NORMAL);
}
////////////////////////////////////////////////////////////////////////////////
// PlatformFontIOS, PlatformFont implementation:
Font PlatformFontIOS::DeriveFont(int size_delta, int style) const {
return Font(new PlatformFontIOS(font_name_, font_size_ + size_delta, style));
}
int PlatformFontIOS::GetHeight() const {
return height_;
}
int PlatformFontIOS::GetBaseline() const {
return ascent_;
}
int PlatformFontIOS::GetAverageCharacterWidth() const {
return average_width_;
}
int PlatformFontIOS::GetStringWidth(const string16& text) const {
NSString* ns_text = base::SysUTF16ToNSString(text);
return [ns_text sizeWithFont:GetNativeFont()].width;
}
int PlatformFontIOS::GetExpectedTextWidth(int length) const {
return length * average_width_;
}
int PlatformFontIOS::GetStyle() const {
return style_;
}
std::string PlatformFontIOS::GetFontName() const {
return font_name_;
}
int PlatformFontIOS::GetFontSize() const {
return font_size_;
}
NativeFont PlatformFontIOS::GetNativeFont() const {
return [UIFont fontWithName:base::SysUTF8ToNSString(font_name_)
size:font_size_];
}
////////////////////////////////////////////////////////////////////////////////
// PlatformFontIOS, private:
PlatformFontIOS::PlatformFontIOS(const std::string& font_name,
int font_size,
int style) {
InitWithNameSizeAndStyle(font_name, font_size, style);
}
void PlatformFontIOS::InitWithNameSizeAndStyle(const std::string& font_name,
int font_size,
int style) {
font_name_ = font_name;
font_size_ = font_size;
style_ = style;
CalculateMetrics();
}
void PlatformFontIOS::CalculateMetrics() {
UIFont* font = GetNativeFont();
height_ = font.lineHeight;
ascent_ = font.ascender;
average_width_ = [@"x" sizeWithFont:font].width;
}
////////////////////////////////////////////////////////////////////////////////
// PlatformFont, public:
// static
PlatformFont* PlatformFont::CreateDefault() {
return new PlatformFontIOS;
}
// static
PlatformFont* PlatformFont::CreateFromNativeFont(NativeFont native_font) {
return new PlatformFontIOS(native_font);
}
// static
PlatformFont* PlatformFont::CreateFromNameAndSize(const std::string& font_name,
int font_size) {
return new PlatformFontIOS(font_name, font_size);
}
} // namespace gfx
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