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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 "chrome/common/gfx/chrome_font.h"
#include <Cocoa/Cocoa.h>
#include "base/logging.h"
#include "base/sys_string_conversions.h"
// static
ChromeFont ChromeFont::CreateFont(const std::wstring& font_name,
int font_size) {
return ChromeFont(font_name, font_size, NORMAL);
}
ChromeFont::ChromeFont(const std::wstring& font_name, int font_size, int style)
: font_name_(font_name),
font_size_(font_size),
style_(style) {
calculateMetrics();
}
ChromeFont::ChromeFont()
: font_size_([NSFont systemFontSize]),
style_(NORMAL) {
NSFont* system_font = [NSFont systemFontOfSize:font_size_];
font_name_ = base::SysNSStringToWide([system_font fontName]);
calculateMetrics();
}
void ChromeFont::calculateMetrics() {
NSFont* font = nativeFont();
height_ = [font xHeight];
ascent_ = [font ascender];
avg_width_ = [font boundingRectForGlyph:[font glyphWithName:@"x"]].size.width;
}
ChromeFont ChromeFont::DeriveFont(int size_delta, int style) const {
return ChromeFont(font_name_, font_size_ + size_delta, style);
}
int ChromeFont::height() const {
return height_;
}
int ChromeFont::baseline() const {
return ascent_;
}
int ChromeFont::ave_char_width() const {
return avg_width_;
}
int ChromeFont::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 ChromeFont::GetExpectedTextWidth(int length) const {
return length * avg_width_;
}
int ChromeFont::style() const {
return style_;
}
std::wstring ChromeFont::FontName() {
return font_name_;
}
int ChromeFont::FontSize() {
return font_size_;
}
NativeFont ChromeFont::nativeFont() const {
// TODO(pinkerton): apply |style_| to font.
// 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_];
}
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