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// Copyright (c) 2009 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 "gfx/font.h"
#include <Cocoa/Cocoa.h>
#include "base/logging.h"
#include "base/scoped_nsobject.h"
#include "base/sys_string_conversions.h"
namespace gfx {
// static
Font Font::CreateFont(const std::wstring& font_name, int font_size) {
return Font(font_name, font_size, NORMAL);
}
Font::Font(const std::wstring& font_name, int font_size, int style)
: font_name_(font_name),
font_size_(font_size),
style_(style) {
calculateMetrics();
}
Font::Font()
: font_size_([NSFont systemFontSize]),
style_(NORMAL) {
NSFont* system_font = [NSFont systemFontOfSize:font_size_];
font_name_ = base::SysNSStringToWide([system_font fontName]);
calculateMetrics();
}
void Font::calculateMetrics() {
NSFont* font = nativeFont();
scoped_nsobject<NSLayoutManager> layout_manager(
[[NSLayoutManager alloc] init]);
height_ = [layout_manager defaultLineHeightForFont:font];
ascent_ = [font ascender];
avg_width_ = [font boundingRectForGlyph:[font glyphWithName:@"x"]].size.width;
}
Font Font::DeriveFont(int size_delta, int style) const {
return Font(font_name_, font_size_ + size_delta, style);
}
int Font::height() const {
return height_;
}
int Font::baseline() const {
return ascent_;
}
int Font::ave_char_width() const {
return avg_width_;
}
int Font::GetStringWidth(const std::wstring& text) const {
NSFont* font = nativeFont();
NSString* ns_string = base::SysWideToNSString(text);
NSDictionary* attributes =
[NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName];
NSSize string_size = [ns_string sizeWithAttributes:attributes];
return string_size.width;
}
int Font::GetExpectedTextWidth(int length) const {
return length * avg_width_;
}
int Font::style() const {
return style_;
}
const std::wstring& Font::FontName() const {
return font_name_;
}
int Font::FontSize() {
return font_size_;
}
NativeFont Font::nativeFont() const {
// TODO(pinkerton): apply |style_| to font. http://crbug.com/34667
// We could cache this, but then we'd have to conditionally change the
// dtor just for MacOS. Not sure if we want to/need to do that.
return [NSFont fontWithName:base::SysWideToNSString(font_name_)
size:font_size_];
}
} // namespace gfx
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