Rework gfx::Font by moving platform-specific code into inner classes....

gfx/font.cc

+// Copyright (c) 2006-2008 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 "gfx/platform_font.h"
+
+namespace gfx {
+
+////////////////////////////////////////////////////////////////////////////////
+// Font, public:
+
+Font::Font() : platform_font_(PlatformFont::CreateDefault()) {
+}
+
+Font::Font(const Font& other) : platform_font_(other.platform_font_) {
+}
+
+gfx::Font& Font::operator=(const Font& other) {
+  platform_font_ = other.platform_font_;
+  return *this;
+}
+
+Font::Font(NativeFont native_font)
+    : platform_font_(PlatformFont::CreateFromNativeFont(native_font)) {
+}
+
+Font::Font(PlatformFont* platform_font) : platform_font_(platform_font) {
+}
+
+Font::Font(const std::wstring& font_name, int font_size)
+    : platform_font_(PlatformFont::CreateFromNameAndSize(font_name,
+                                                         font_size)) {
+}
+
+Font::~Font() {
+}
+
+Font Font::DeriveFont(int size_delta) const {
+  return DeriveFont(size_delta, GetStyle());
+}
+
+Font Font::DeriveFont(int size_delta, int style) const {
+  return platform_font_->DeriveFont(size_delta, style);
+}
+
+int Font::GetHeight() const {
+  return platform_font_->GetHeight();
+}
+
+int Font::GetBaseline() const {
+  return platform_font_->GetBaseline();
+}
+
+int Font::GetAverageCharacterWidth() const {
+  return platform_font_->GetAverageCharacterWidth();
+}
+
+int Font::GetStringWidth(const std::wstring& text) const {
+  return platform_font_->GetStringWidth(text);
+}
+
+int Font::GetExpectedTextWidth(int length) const {
+  return platform_font_->GetExpectedTextWidth(length);
+}
+
+int Font::GetStyle() const {
+  return platform_font_->GetStyle();
+}
+
+const std::wstring& Font::GetFontName() const {
+  return platform_font_->GetFontName();
+}
+
+int Font::GetFontSize() const {
+  return platform_font_->GetFontSize();
+}
+
+NativeFont Font::GetNativeFont() const {
+  return platform_font_->GetNativeFont();
+}
+
+}  // namespace gfx
+