gecko-dev/gfx/thebes/gfxFontConstants.h

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* font constants shared by both thebes and layout */

#ifndef GFX_FONT_CONSTANTS_H
#define GFX_FONT_CONSTANTS_H

/*
 * This file is separate from gfxFont.h so that layout can include it
 * without bringing in gfxFont.h and everything it includes.
 */

#define NS_FONT_STYLE_NORMAL            0
#define NS_FONT_STYLE_ITALIC            1
#define NS_FONT_STYLE_OBLIQUE           2

#define NS_FONT_WEIGHT_NORMAL           400
#define NS_FONT_WEIGHT_BOLD             700
#define NS_FONT_WEIGHT_THIN             100

#define NS_FONT_STRETCH_ULTRA_CONDENSED 50
#define NS_FONT_STRETCH_EXTRA_CONDENSED 62
#define NS_FONT_STRETCH_CONDENSED       75
#define NS_FONT_STRETCH_SEMI_CONDENSED  87
#define NS_FONT_STRETCH_NORMAL          100
#define NS_FONT_STRETCH_SEMI_EXPANDED   112
#define NS_FONT_STRETCH_EXPANDED        125
#define NS_FONT_STRETCH_EXTRA_EXPANDED  150
#define NS_FONT_STRETCH_ULTRA_EXPANDED  200

#define NS_FONT_SMOOTHING_AUTO          0
#define NS_FONT_SMOOTHING_GRAYSCALE     1

#define NS_FONT_KERNING_AUTO                        0
#define NS_FONT_KERNING_NONE                        1
#define NS_FONT_KERNING_NORMAL                      2

#define NS_FONT_SYNTHESIS_WEIGHT                    0x1
#define NS_FONT_SYNTHESIS_STYLE                     0x2

#define NS_FONT_DISPLAY_AUTO            0
#define NS_FONT_DISPLAY_BLOCK           1
#define NS_FONT_DISPLAY_SWAP            2
#define NS_FONT_DISPLAY_FALLBACK        3
#define NS_FONT_DISPLAY_OPTIONAL        4

#define NS_FONT_OPTICAL_SIZING_AUTO     0
#define NS_FONT_OPTICAL_SIZING_NONE     1

#define NS_FONT_VARIANT_ALTERNATES_NORMAL             0
// alternates - simple enumerated values
#define NS_FONT_VARIANT_ALTERNATES_HISTORICAL        (1 << 0)

// alternates - values that use functional syntax
#define NS_FONT_VARIANT_ALTERNATES_STYLISTIC         (1 << 1)
#define NS_FONT_VARIANT_ALTERNATES_STYLESET          (1 << 2)
#define NS_FONT_VARIANT_ALTERNATES_CHARACTER_VARIANT (1 << 3)
#define NS_FONT_VARIANT_ALTERNATES_SWASH             (1 << 4)
#define NS_FONT_VARIANT_ALTERNATES_ORNAMENTS         (1 << 5)
#define NS_FONT_VARIANT_ALTERNATES_ANNOTATION        (1 << 6)
#define NS_FONT_VARIANT_ALTERNATES_COUNT              7

#define NS_FONT_VARIANT_ALTERNATES_ENUMERATED_MASK \
    NS_FONT_VARIANT_ALTERNATES_HISTORICAL

#define NS_FONT_VARIANT_ALTERNATES_FUNCTIONAL_MASK ( \
    NS_FONT_VARIANT_ALTERNATES_STYLISTIC | \
    NS_FONT_VARIANT_ALTERNATES_STYLESET | \
    NS_FONT_VARIANT_ALTERNATES_CHARACTER_VARIANT | \
    NS_FONT_VARIANT_ALTERNATES_SWASH | \
    NS_FONT_VARIANT_ALTERNATES_ORNAMENTS | \
    NS_FONT_VARIANT_ALTERNATES_ANNOTATION )

#define NS_FONT_VARIANT_CAPS_NORMAL                 0
#define NS_FONT_VARIANT_CAPS_SMALLCAPS              1
#define NS_FONT_VARIANT_CAPS_ALLSMALL               2
#define NS_FONT_VARIANT_CAPS_PETITECAPS             3
#define NS_FONT_VARIANT_CAPS_ALLPETITE              4
#define NS_FONT_VARIANT_CAPS_TITLING                5
#define NS_FONT_VARIANT_CAPS_UNICASE                6

#define NS_FONT_VARIANT_EAST_ASIAN_NORMAL       0
#define NS_FONT_VARIANT_EAST_ASIAN_JIS78       (1 << 0)
#define NS_FONT_VARIANT_EAST_ASIAN_JIS83       (1 << 1)
#define NS_FONT_VARIANT_EAST_ASIAN_JIS90       (1 << 2)
#define NS_FONT_VARIANT_EAST_ASIAN_JIS04       (1 << 3)
#define NS_FONT_VARIANT_EAST_ASIAN_SIMPLIFIED  (1 << 4)
#define NS_FONT_VARIANT_EAST_ASIAN_TRADITIONAL (1 << 5)
#define NS_FONT_VARIANT_EAST_ASIAN_FULL_WIDTH  (1 << 6)
#define NS_FONT_VARIANT_EAST_ASIAN_PROP_WIDTH  (1 << 7)
#define NS_FONT_VARIANT_EAST_ASIAN_RUBY        (1 << 8)
#define NS_FONT_VARIANT_EAST_ASIAN_COUNT        9

#define NS_FONT_VARIANT_EAST_ASIAN_VARIANT_MASK ( \
    NS_FONT_VARIANT_EAST_ASIAN_JIS78 | \
    NS_FONT_VARIANT_EAST_ASIAN_JIS83 | \
    NS_FONT_VARIANT_EAST_ASIAN_JIS90 | \
    NS_FONT_VARIANT_EAST_ASIAN_JIS04 | \
    NS_FONT_VARIANT_EAST_ASIAN_SIMPLIFIED | \
    NS_FONT_VARIANT_EAST_ASIAN_TRADITIONAL )

#define NS_FONT_VARIANT_EAST_ASIAN_WIDTH_MASK ( \
    NS_FONT_VARIANT_EAST_ASIAN_FULL_WIDTH | \
    NS_FONT_VARIANT_EAST_ASIAN_PROP_WIDTH )

#define NS_FONT_VARIANT_LIGATURES_NORMAL            0
#define NS_FONT_VARIANT_LIGATURES_NONE             (1 << 0)
#define NS_FONT_VARIANT_LIGATURES_COMMON           (1 << 1)
#define NS_FONT_VARIANT_LIGATURES_NO_COMMON        (1 << 2)
#define NS_FONT_VARIANT_LIGATURES_DISCRETIONARY    (1 << 3)
#define NS_FONT_VARIANT_LIGATURES_NO_DISCRETIONARY (1 << 4)
#define NS_FONT_VARIANT_LIGATURES_HISTORICAL       (1 << 5)
#define NS_FONT_VARIANT_LIGATURES_NO_HISTORICAL    (1 << 6)
#define NS_FONT_VARIANT_LIGATURES_CONTEXTUAL       (1 << 7)
#define NS_FONT_VARIANT_LIGATURES_NO_CONTEXTUAL    (1 << 8)
#define NS_FONT_VARIANT_LIGATURES_COUNT             9

#define NS_FONT_VARIANT_LIGATURES_COMMON_MASK ( \
    NS_FONT_VARIANT_LIGATURES_COMMON | \
    NS_FONT_VARIANT_LIGATURES_NO_COMMON )

#define NS_FONT_VARIANT_LIGATURES_DISCRETIONARY_MASK ( \
    NS_FONT_VARIANT_LIGATURES_DISCRETIONARY | \
    NS_FONT_VARIANT_LIGATURES_NO_DISCRETIONARY )

#define NS_FONT_VARIANT_LIGATURES_HISTORICAL_MASK ( \
    NS_FONT_VARIANT_LIGATURES_HISTORICAL | \
    NS_FONT_VARIANT_LIGATURES_NO_HISTORICAL )

#define NS_FONT_VARIANT_LIGATURES_CONTEXTUAL_MASK \
    NS_FONT_VARIANT_LIGATURES_CONTEXTUAL | \
    NS_FONT_VARIANT_LIGATURES_NO_CONTEXTUAL

#define NS_FONT_VARIANT_NUMERIC_NORMAL              0
#define NS_FONT_VARIANT_NUMERIC_LINING             (1 << 0)
#define NS_FONT_VARIANT_NUMERIC_OLDSTYLE           (1 << 1)
#define NS_FONT_VARIANT_NUMERIC_PROPORTIONAL       (1 << 2)
#define NS_FONT_VARIANT_NUMERIC_TABULAR            (1 << 3)
#define NS_FONT_VARIANT_NUMERIC_DIAGONAL_FRACTIONS (1 << 4)
#define NS_FONT_VARIANT_NUMERIC_STACKED_FRACTIONS  (1 << 5)
#define NS_FONT_VARIANT_NUMERIC_SLASHZERO          (1 << 6)
#define NS_FONT_VARIANT_NUMERIC_ORDINAL            (1 << 7)
#define NS_FONT_VARIANT_NUMERIC_COUNT               8

#define NS_FONT_VARIANT_NUMERIC_FIGURE_MASK \
    NS_FONT_VARIANT_NUMERIC_LINING | \
    NS_FONT_VARIANT_NUMERIC_OLDSTYLE

#define NS_FONT_VARIANT_NUMERIC_SPACING_MASK \
    NS_FONT_VARIANT_NUMERIC_PROPORTIONAL | \
    NS_FONT_VARIANT_NUMERIC_TABULAR

#define NS_FONT_VARIANT_NUMERIC_FRACTION_MASK \
    NS_FONT_VARIANT_NUMERIC_DIAGONAL_FRACTIONS | \
    NS_FONT_VARIANT_NUMERIC_STACKED_FRACTIONS

#define NS_FONT_VARIANT_POSITION_NORMAL             0
#define NS_FONT_VARIANT_POSITION_SUPER              1
#define NS_FONT_VARIANT_POSITION_SUB                2

#define NS_FONT_VARIANT_WIDTH_NORMAL  0
#define NS_FONT_VARIANT_WIDTH_FULL    1
#define NS_FONT_VARIANT_WIDTH_HALF    2
#define NS_FONT_VARIANT_WIDTH_THIRD   3
#define NS_FONT_VARIANT_WIDTH_QUARTER 4

// based on fixed offset values used within WebKit
#define NS_FONT_SUBSCRIPT_OFFSET_RATIO     (0.20)
#define NS_FONT_SUPERSCRIPT_OFFSET_RATIO   (0.34)

// this roughly corresponds to font-size: smaller behavior
// at smaller sizes <20px the ratio is closer to 0.8 while at
// larger sizes >45px the ratio is closer to 0.667 and in between
// a blend of values is used
#define NS_FONT_SUB_SUPER_SIZE_RATIO_SMALL       (0.82)
#define NS_FONT_SUB_SUPER_SIZE_RATIO_LARGE       (0.667)
#define NS_FONT_SUB_SUPER_SMALL_SIZE             (20.0)
#define NS_FONT_SUB_SUPER_LARGE_SIZE             (45.0)

// pref lang id's for font prefs
enum eFontPrefLang {
    #define FONT_PREF_LANG(enum_id_, str_, atom_id_) eFontPrefLang_ ## enum_id_
    #include "gfxFontPrefLangList.h"
    #undef FONT_PREF_LANG

    , eFontPrefLang_CJKSet  // special code for CJK set
    , eFontPrefLang_Emoji   // special code for emoji presentation
    , eFontPrefLang_First = eFontPrefLang_Western
    , eFontPrefLang_Last = eFontPrefLang_Others
    , eFontPrefLang_Count = (eFontPrefLang_Last - eFontPrefLang_First + 1)
};

#endif