Index: ui/views/style/typography_provider.h |
diff --git a/ui/views/style/typography_provider.h b/ui/views/style/typography_provider.h |
new file mode 100644 |
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+++ b/ui/views/style/typography_provider.h |
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+// Copyright 2017 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_VIEWS_STYLE_TYPOGRAPHY_PROVIDER_H_ |
+#define UI_VIEWS_STYLE_TYPOGRAPHY_PROVIDER_H_ |
+ |
+#include "base/macros.h" |
+#include "third_party/skia/include/core/SkColor.h" |
+#include "ui/gfx/font.h" |
+#include "ui/views/views_export.h" |
+ |
+namespace gfx { |
+class FontList; |
+} |
+ |
+namespace views { |
+ |
+// Provides fonts to use in toolkit-views UI. |
+class VIEWS_EXPORT TypographyProvider { |
+ public: |
+ virtual ~TypographyProvider() = default; |
+ |
+ // Gets the FontList for the given |context| and |style|. |
+ virtual const gfx::FontList& GetFont(int context, int style) const = 0; |
+ |
+ // Gets the color for the given |context| and |style|. This may consult |
+ // ui::NativeTheme. |
+ virtual SkColor GetColor(int context, int style) const = 0; |
+ |
+ // Gets the line spacing, or 0 if it should be provided by gfx::FontList. |
+ virtual int GetLineHeight(int context, int style) const = 0; |
+ |
+ protected: |
+ TypographyProvider() = default; |
+ |
+ private: |
+ DISALLOW_COPY_AND_ASSIGN(TypographyProvider); |
+}; |
+ |
+// The default provider aims to provide values to match pre-Harmony constants |
+// for the given contexts so that old UI does not change. |
+class VIEWS_EXPORT DefaultTypographyProvider : public TypographyProvider { |
+ public: |
+ DefaultTypographyProvider() = default; |
+ |
+ // TypographyProvider: |
+ const gfx::FontList& GetFont(int context, int style) const override; |
+ SkColor GetColor(int context, int style) const override; |
+ int GetLineHeight(int context, int style) const override; |
+ |
+ // Sets the |size_delta| and |font_weight| that the the default GetFont() |
+ // implementation uses. Always sets values, even for styles it doesn't know |
+ // about. |
+ void GetDefaultFont(int context, |
+ int style, |
+ int* size_delta, |
+ gfx::Font::Weight* font_weight) const; |
+ |
+ private: |
+ DISALLOW_COPY_AND_ASSIGN(DefaultTypographyProvider); |
+}; |
+ |
+} // namespace views |
+ |
+#endif // UI_VIEWS_STYLE_TYPOGRAPHY_PROVIDER_H_ |