specify locale-dependent font list for UI on ChromeOS, so that those fonts have higher priority over the fallback fonts Pango picks up.

BUG=103860
TEST=build aura, start chromium in 'ar' locale. type in Arabic and check the Arabic text's shapes. remove IDS_UI_FONT_FAMILY_CROS from 'ar' resource file, build aura again, start chromium in 'ar', type in Arabic and the Arabic text's shapes should be different.

Review URL: http://codereview.chromium.org/8770034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@114953 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 79 insertions, 0 deletions

diff --git a/ui/gfx/font_list.h b/ui/gfx/font_list.h
new file mode 100644
index 0000000..ef6b357
--- /dev/null
+++ b/ui/gfx/font_list.h
@@ -0,0 +1,79 @@
+// Copyright (c) 2011 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_FONT_LIST_H_
+#define UI_GFX_FONT_LIST_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "base/gtest_prod_util.h"
+#include "ui/base/ui_export.h"
+#include "ui/gfx/font.h"
+
+namespace gfx {
+
+// FontList represents a list of fonts either in the form of Font vector or in
+// the form of a string representing font names, styles, and size.
+//
+// The string representation is in the form "FAMILY_LIST [STYLE_OPTIONS] SIZE",
+// where FAMILY_LIST is a comma separated list of families terminated by a
+// comma, STYLE_OPTIONS is a whitespace separated list of words where each word
+// describes one of style, variant, weight, stretch, or gravity, and SIZE is
+// a decimal number (size in points). STYLE_OPTIONS may be absent.
+//
+// The string format complies with that of Pango detailed at
+// http://developer.gnome.org/pango/stable/pango-Fonts.html#pango-font-description-from-string
+//
+// FontList could be initialized either way without conversion to the other
+// form. The conversion to the other form is done only when asked to get the
+// other form.
+//
+// FontList allows operator= since FontList is a data member type in RenderText,
+// and operator= is used in RenderText::SetFontList().
+class UI_EXPORT FontList {
+ public:
+  // Creates a font list with a Font with default name and style.
+  FontList();
+
+  // Creates a font list from a string representing font names, styles, and
+  // size.
+  explicit FontList(const std::string& font_description_string);
+
+  // Creates a font list from a Font vector.
+  // All fonts in this vector should have the same style and size.
+  explicit FontList(const std::vector<Font>& fonts);
+
+  // Creates a font list from a Font.
+  explicit FontList(const Font& font);
+
+  ~FontList();
+
+  // Returns a string representing font names, styles, and size. If the FontList
+  // is initialized by a vector of Font, use the first font's style and size
+  // for the description.
+  const std::string& GetFontDescriptionString() const;
+
+  // Returns the Font vector.
+  const std::vector<Font>& GetFonts() const;
+
+ private:
+  // A vector of Font. If FontList is constructed with font description string,
+  // |fonts_| is not initialized during construction. Instead, it is computed
+  // lazily when user asked to get the font vector.
+  mutable std::vector<Font> fonts_;
+
+  // A string representing font names, styles, and sizes.
+  // Please refer to the comments before class declaration for details on string
+  // format.
+  // If FontList is constructed with a vector of font,
+  // |font_description_string_| is not initialized during construction. Instead,
+  // it is computed lazily when user asked to get the font description string.
+  mutable std::string font_description_string_;
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_FONT_LIST_H_