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// Copyright 2012 The Chromium Authors
// 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 <cmath>
#include "base/apple/bridging.h"
#import "base/apple/foundation_util.h"
#include "base/notreached.h"
#include "base/strings/sys_string_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "third_party/skia/include/ports/SkTypeface_mac.h"
#include "ui/gfx/font.h"
#include "ui/gfx/font_render_params.h"
#include "ui/gfx/ios/NSString+CrStringDrawing.h"
namespace gfx {
#if BUILDFLAG(USE_BLINK)
namespace {
std::string GetFamilyNameFromTypeface(sk_sp<SkTypeface> typeface) {
SkString family;
typeface->getFamilyName(&family);
return family.c_str();
}
} // namespace
#endif
////////////////////////////////////////////////////////////////////////////////
// PlatformFontIOS, public:
PlatformFontIOS::PlatformFontIOS() {
#if BUILDFLAG(IS_IOS_TVOS)
// TODO(https://crbug.com/404394287): Need to determine the appropriate
// default font size for tvOS.
UIFont* system_font = [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
font_size_ = static_cast<int>(system_font.pointSize);
#else
font_size_ = UIFont.systemFontSize;
UIFont* system_font = [UIFont systemFontOfSize:font_size_];
#endif
font_name_ = base::SysNSStringToUTF8(system_font.fontName);
style_ = Font::NORMAL;
weight_ = Font::Weight::NORMAL;
CalculateMetrics();
}
PlatformFontIOS::PlatformFontIOS(CTFontRef ct_font) {
UIFont* font = base::apple::CFToNSPtrCast(ct_font);
std::string font_name = base::SysNSStringToUTF8(font.fontName);
InitWithNameSizeAndStyle(font_name, font.pointSize, Font::NORMAL,
Font::Weight::NORMAL);
}
PlatformFontIOS::PlatformFontIOS(const std::string& font_name, int font_size) {
InitWithNameSizeAndStyle(font_name, font_size, Font::NORMAL,
Font::Weight::NORMAL);
}
#if BUILDFLAG(USE_BLINK)
PlatformFontIOS::PlatformFontIOS(
sk_sp<SkTypeface> typeface,
int font_size_pixels,
const std::optional<FontRenderParams>& params) {
InitWithNameSizeAndStyle(GetFamilyNameFromTypeface(typeface),
font_size_pixels,
(typeface->isItalic() ? Font::ITALIC : Font::NORMAL),
FontWeightFromInt(typeface->fontStyle().weight()));
}
#endif
////////////////////////////////////////////////////////////////////////////////
// PlatformFontIOS, PlatformFont implementation:
Font PlatformFontIOS::DeriveFont(int size_delta,
int style,
Font::Weight weight) const {
return Font(
new PlatformFontIOS(font_name_, font_size_ + size_delta, style, weight));
}
int PlatformFontIOS::GetHeight() {
return height_;
}
int PlatformFontIOS::GetBaseline() {
return ascent_;
}
int PlatformFontIOS::GetCapHeight() {
return cap_height_;
}
int PlatformFontIOS::GetExpectedTextWidth(int length) {
return length * average_width_;
}
int PlatformFontIOS::GetStyle() const {
return style_;
}
Font::Weight PlatformFontIOS::GetWeight() const {
return weight_;
}
const std::string& PlatformFontIOS::GetFontName() const {
return font_name_;
}
std::string PlatformFontIOS::GetActualFontName() const {
UIFont* font = base::apple::CFToNSPtrCast(GetCTFont());
return base::SysNSStringToUTF8(font.familyName);
}
int PlatformFontIOS::GetFontSize() const {
return font_size_;
}
const FontRenderParams& PlatformFontIOS::GetFontRenderParams() {
return render_params_;
}
CTFontRef PlatformFontIOS::GetCTFont() const {
UIFont* font = [UIFont fontWithName:base::SysUTF8ToNSString(font_name_)
size:font_size_];
UIFontDescriptor* descriptor = [font fontDescriptor];
uint32_t traits = 0;
if (weight_ >= Font::Weight::BOLD) {
traits |= UIFontDescriptorTraitBold;
}
if (style_ == Font::ITALIC) {
traits |= UIFontDescriptorTraitItalic;
}
descriptor = [descriptor fontDescriptorWithSymbolicTraits:traits];
// 0.0 size means that the original size of the font specified in the
// descriptor should be kept.
UIFont* font_with_traits = [UIFont fontWithDescriptor:descriptor size:0.0];
// UIFont's fontWithDescriptor:size: method can return nil if it cannot find a
// font that matches the given descriptor.
if (font_with_traits) {
return base::apple::NSToCFPtrCast(font_with_traits);
} else {
return base::apple::NSToCFPtrCast(font);
}
}
sk_sp<SkTypeface> PlatformFontIOS::GetNativeSkTypeface() const {
return SkMakeTypefaceFromCTFont(GetCTFont());
}
////////////////////////////////////////////////////////////////////////////////
// PlatformFontIOS, private:
PlatformFontIOS::PlatformFontIOS(const std::string& font_name,
int font_size,
int style,
Font::Weight weight) {
InitWithNameSizeAndStyle(font_name, font_size, style, weight);
}
void PlatformFontIOS::InitWithNameSizeAndStyle(const std::string& font_name,
int font_size,
int style,
Font::Weight weight) {
font_name_ = font_name;
font_size_ = font_size;
style_ = style;
weight_ = weight;
CalculateMetrics();
}
void PlatformFontIOS::CalculateMetrics() {
UIFont* font = base::apple::CFToNSPtrCast(GetCTFont());
height_ = ceil(font.lineHeight);
ascent_ = ceil(font.ascender);
cap_height_ = ceil(font.capHeight);
average_width_ = [@"x" cr_sizeWithFont:font].width;
FontRenderParamsQuery query;
query.families.push_back(font_name_);
query.pixel_size = font_size_;
query.style = style_;
query.weight = weight_;
render_params_ = gfx::GetFontRenderParams(query, nullptr);
}
////////////////////////////////////////////////////////////////////////////////
// PlatformFont, public:
// static
PlatformFont* PlatformFont::CreateDefault() {
return new PlatformFontIOS;
}
// static
PlatformFont* PlatformFont::CreateFromCTFont(CTFontRef ct_font) {
return new PlatformFontIOS(ct_font);
}
// static
PlatformFont* PlatformFont::CreateFromNameAndSize(const std::string& font_name,
int font_size) {
return new PlatformFontIOS(font_name, font_size);
}
#if BUILDFLAG(USE_BLINK)
// static
PlatformFont* PlatformFont::CreateFromSkTypeface(
sk_sp<SkTypeface> typeface,
int font_size_pixels,
const std::optional<FontRenderParams>& params) {
return new PlatformFontIOS(typeface, font_size_pixels, params);
}
#endif
} // namespace gfx
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