Added platform_font_ios for iOS-specific fonts.

Review URL: https://chromiumcodereview.appspot.com/10896003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@154478 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 57 insertions, 0 deletions

diff --git a/ui/gfx/platform_font_ios.h b/ui/gfx/platform_font_ios.h
new file mode 100644
index 0000000..8947761
--- /dev/null
+++ b/ui/gfx/platform_font_ios.h
@@ -0,0 +1,57 @@
+// 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.
+
+#ifndef UI_GFX_PLATFORM_FONT_IOS_H_
+#define UI_GFX_PLATFORM_FONT_IOS_H_
+
+#include "ui/gfx/platform_font.h"
+
+namespace gfx {
+
+class PlatformFontIOS : public PlatformFont {
+ public:
+  PlatformFontIOS();
+  explicit PlatformFontIOS(NativeFont native_font);
+  PlatformFontIOS(const std::string& font_name,
+                  int font_size);
+
+  // Overridden from PlatformFont:
+  virtual Font DeriveFont(int size_delta, int style) const OVERRIDE;
+  virtual int GetHeight() const OVERRIDE;
+  virtual int GetBaseline() const OVERRIDE;
+  virtual int GetAverageCharacterWidth() const OVERRIDE;
+  virtual int GetStringWidth(const string16& text) const OVERRIDE;
+  virtual int GetExpectedTextWidth(int length) const OVERRIDE;
+  virtual int GetStyle() const OVERRIDE;
+  virtual std::string GetFontName() const OVERRIDE;
+  virtual int GetFontSize() const OVERRIDE;
+  virtual NativeFont GetNativeFont() const OVERRIDE;
+
+ private:
+  PlatformFontIOS(const std::string& font_name, int font_size, int style);
+  virtual ~PlatformFontIOS() {}
+
+  // Initialize the object with the specified parameters.
+  void InitWithNameSizeAndStyle(const std::string& font_name,
+                                int font_size,
+                                int style);
+
+  // Calculate and cache the font metrics.
+  void CalculateMetrics();
+
+  std::string font_name_;
+  int font_size_;
+  int style_;
+
+  // Cached metrics, generated at construction.
+  int height_;
+  int ascent_;
+  int average_width_;
+
+  DISALLOW_COPY_AND_ASSIGN(PlatformFontIOS);
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_PLATFORM_FONT_IOS_H_