Adding Locale (language attribute) information to font and using the

Source/platform/fonts/FontDescription.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 63 matching lines @@
         , m_historicalLigaturesState(NormalLigaturesState)
         , m_contextualLigaturesState(NormalLigaturesState)
         , m_keywordSize(0)
         , m_fontSmoothing(AutoSmoothing)
         , m_textRendering(AutoTextRendering)
         , m_script(USCRIPT_COMMON)
         , m_syntheticBold(false)
         , m_syntheticItalic(false)
         , m_subpixelTextPosition(s_useSubpixelTextPositioning)
         , m_typesettingFeatures(s_defaultTypesettingFeatures)
+        , m_locale(String("en"))

[eae, 2014/05/19 18:56:13]

How about storing the hb_language_t instead of the locale string and then
initialize it to either HB_LANGUAGE_INVALID or hb_language_get_default()?

[h.joshi, 2014/05/20 04:22:14]

Okey, will start working on this suggestion and share new patch.

     {
     }
 
     bool operator==(const FontDescription&) const;
     bool operator!=(const FontDescription& other) const { return !(*this == other); }
 
     const FontFamily& family() const { return m_familyList; }
     FontFamily& firstFamily() { return m_familyList; }
     float specifiedSize() const { return m_specifiedSize; }
     float computedSize() const { return m_computedSize; }
@@ skipping 15 matching lines @@
     bool useFixedDefaultSize() const { return genericFamily() == MonospaceFamily && !family().next() && family().family() == FontFamilyNames::webkit_monospace; }
     Kerning kerning() const { return static_cast<Kerning>(m_kerning); }
     LigaturesState commonLigaturesState() const { return static_cast<LigaturesState>(m_commonLigaturesState); }
     LigaturesState discretionaryLigaturesState() const { return static_cast<LigaturesState>(m_discretionaryLigaturesState); }
     LigaturesState historicalLigaturesState() const { return static_cast<LigaturesState>(m_historicalLigaturesState); }
     LigaturesState contextualLigaturesState() const { return static_cast<LigaturesState>(m_contextualLigaturesState); }
     unsigned keywordSize() const { return m_keywordSize; }
     FontSmoothingMode fontSmoothing() const { return static_cast<FontSmoothingMode>(m_fontSmoothing); }
     TextRenderingMode textRendering() const { return static_cast<TextRenderingMode>(m_textRendering); }
     UScriptCode script() const { return static_cast<UScriptCode>(m_script); }
+    const String& locale() const { return m_locale; }
     bool isSyntheticBold() const { return m_syntheticBold; }
     bool isSyntheticItalic() const { return m_syntheticItalic; }
     bool useSubpixelPositioning() const { return m_subpixelTextPosition; }
 
     FontTraits traits() const;
     float wordSpacing() const { return m_wordSpacing; }
     float letterSpacing() const { return m_letterSpacing; }
     FontOrientation orientation() const { return static_cast<FontOrientation>(m_orientation); }
     NonCJKGlyphOrientation nonCJKGlyphOrientation() const { return static_cast<NonCJKGlyphOrientation>(m_nonCJKGlyphOrientation); }
     FontWidthVariant widthVariant() const { return static_cast<FontWidthVariant>(m_widthVariant); }
@@ skipping 18 matching lines @@
     void setDiscretionaryLigaturesState(LigaturesState discretionaryLigaturesState) { m_discretionaryLigaturesState = discretionaryLigaturesState; updateTypesettingFeatures(); }
     void setHistoricalLigaturesState(LigaturesState historicalLigaturesState) { m_historicalLigaturesState = historicalLigaturesState; updateTypesettingFeatures(); }
     void setContextualLigaturesState(LigaturesState contextualLigaturesState) { m_contextualLigaturesState = contextualLigaturesState; updateTypesettingFeatures(); }
     void setKeywordSize(unsigned s) { m_keywordSize = s; }
     void setFontSmoothing(FontSmoothingMode smoothing) { m_fontSmoothing = smoothing; }
     void setTextRendering(TextRenderingMode rendering) { m_textRendering = rendering; updateTypesettingFeatures(); }
     void setOrientation(FontOrientation orientation) { m_orientation = orientation; }
     void setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation) { m_nonCJKGlyphOrientation = orientation; }
     void setWidthVariant(FontWidthVariant widthVariant) { m_widthVariant = widthVariant; }
     void setScript(UScriptCode s) { m_script = s; }
+    void setLocale(const String& localeStr) { m_locale = localeStr; }
     void setSyntheticBold(bool syntheticBold) { m_syntheticBold = syntheticBold; }
     void setSyntheticItalic(bool syntheticItalic) { m_syntheticItalic = syntheticItalic; }
     void setFeatureSettings(PassRefPtr<FontFeatureSettings> settings) { m_featureSettings = settings; }
     void setTraits(FontTraits);
     void setWordSpacing(float s) { m_wordSpacing = s; }
     void setLetterSpacing(float s) { m_letterSpacing = s; }
 
     TypesettingFeatures typesettingFeatures() const { return static_cast<TypesettingFeatures>(m_typesettingFeatures); }
 
     static void setSubpixelPositioning(bool b) { s_useSubpixelTextPositioning = b; }
@@ skipping 45 matching lines @@
     unsigned m_script : 7; // Used to help choose an appropriate font for generic font families.
     unsigned m_syntheticBold : 1;
     unsigned m_syntheticItalic : 1;
     unsigned m_subpixelTextPosition : 1;
 
     mutable unsigned m_typesettingFeatures : 2; // TypesettingFeatures
 
     static TypesettingFeatures s_defaultTypesettingFeatures;
 
     static bool s_useSubpixelTextPositioning;
+    String m_locale;
 };
 
 inline bool FontDescription::operator==(const FontDescription& other) const
 {
     return m_familyList == other.m_familyList
         && m_specifiedSize == other.m_specifiedSize
         && m_computedSize == other.m_computedSize
         && m_letterSpacing == other.m_letterSpacing
         && m_wordSpacing == other.m_wordSpacing
         && m_style == other.m_style
@@ skipping 17 matching lines @@
         && m_script == other.m_script
         && m_syntheticBold == other.m_syntheticBold
         && m_syntheticItalic == other.m_syntheticItalic
         && m_featureSettings == other.m_featureSettings
         && m_subpixelTextPosition == other.m_subpixelTextPosition;
 }
 
 }
 
 #endif