src/basic/glyph-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "env-util.h"
   4 #include "glyph-util.h"
   5 #include "locale-util.h"
   6 #include "strv.h"
   7
   8 bool emoji_enabled(void) {
   9         static int cached_emoji_enabled = -1;
  10
  11         if (cached_emoji_enabled < 0) {
  12                 int val;
  13
  14                 val = getenv_bool("SYSTEMD_EMOJI");
  15                 if (val < 0)
  16                         cached_emoji_enabled =
  17                                 is_locale_utf8() &&
  18                                 !STRPTR_IN_SET(getenv("TERM"), "dumb", "linux");
  19                 else
  20                         cached_emoji_enabled = val;
  21         }
  22
  23         return cached_emoji_enabled;
  24 }
  25
  26 const char *special_glyph(SpecialGlyph code) {
  27
  28         /* A list of a number of interesting unicode glyphs we can use to decorate our output. It's probably wise to be
  29          * conservative here, and primarily stick to the glyphs defined in the eurlatgr font, so that display still
  30          * works reasonably well on the Linux console. For details see:
  31          *
  32          * http://git.altlinux.org/people/legion/packages/kbd.git?p=kbd.git;a=blob;f=data/consolefonts/README.eurlatgr
  33          */
  34
  35         static const char* const draw_table[2][_SPECIAL_GLYPH_MAX] = {
  36                 /* ASCII fallback */
  37                 [false] = {
  38                         [SPECIAL_GLYPH_TREE_VERTICAL]           = "| ",
  39                         [SPECIAL_GLYPH_TREE_BRANCH]             = "|-",
  40                         [SPECIAL_GLYPH_TREE_RIGHT]              = "`-",
  41                         [SPECIAL_GLYPH_TREE_SPACE]              = "  ",
  42                         [SPECIAL_GLYPH_TRIANGULAR_BULLET]       = ">",
  43                         [SPECIAL_GLYPH_BLACK_CIRCLE]            = "*",
  44                         [SPECIAL_GLYPH_WHITE_CIRCLE]            = "*",
  45                         [SPECIAL_GLYPH_MULTIPLICATION_SIGN]     = "x",
  46                         [SPECIAL_GLYPH_CIRCLE_ARROW]            = "*",
  47                         [SPECIAL_GLYPH_BULLET]                  = "*",
  48                         [SPECIAL_GLYPH_MU]                      = "u",
  49                         [SPECIAL_GLYPH_CHECK_MARK]              = "+",
  50                         [SPECIAL_GLYPH_CROSS_MARK]              = "-",
  51                         [SPECIAL_GLYPH_LIGHT_SHADE]             = "-",
  52                         [SPECIAL_GLYPH_DARK_SHADE]              = "X",
  53                         [SPECIAL_GLYPH_SIGMA]                   = "S",
  54                         [SPECIAL_GLYPH_ARROW]                   = "->",
  55                         [SPECIAL_GLYPH_ELLIPSIS]                = "...",
  56                         [SPECIAL_GLYPH_EXTERNAL_LINK]           = "[LNK]",
  57                         [SPECIAL_GLYPH_ECSTATIC_SMILEY]         = ":-]",
  58                         [SPECIAL_GLYPH_HAPPY_SMILEY]            = ":-}",
  59                         [SPECIAL_GLYPH_SLIGHTLY_HAPPY_SMILEY]   = ":-)",
  60                         [SPECIAL_GLYPH_NEUTRAL_SMILEY]          = ":-|",
  61                         [SPECIAL_GLYPH_SLIGHTLY_UNHAPPY_SMILEY] = ":-(",
  62                         [SPECIAL_GLYPH_UNHAPPY_SMILEY]          = ":-{",
  63                         [SPECIAL_GLYPH_DEPRESSED_SMILEY]        = ":-[",
  64                         [SPECIAL_GLYPH_LOCK_AND_KEY]            = "o-,",
  65                         [SPECIAL_GLYPH_TOUCH]                   = "O=",    /* Yeah, not very convincing, can you do it better? */
  66                         [SPECIAL_GLYPH_RECYCLING]               = "~",
  67                         [SPECIAL_GLYPH_DOWNLOAD]                = "\\",
  68                         [SPECIAL_GLYPH_SPARKLES]                = "*",
  69                 },
  70
  71                 /* UTF-8 */
  72                 [true] = {
  73                         /* The following are multiple glyphs in both ASCII and in UNICODE */
  74                         [SPECIAL_GLYPH_TREE_VERTICAL]           = "\342\224\202 ",            /* │  */
  75                         [SPECIAL_GLYPH_TREE_BRANCH]             = "\342\224\234\342\224\200", /* ├─ */
  76                         [SPECIAL_GLYPH_TREE_RIGHT]              = "\342\224\224\342\224\200", /* └─ */
  77                         [SPECIAL_GLYPH_TREE_SPACE]              = "  ",                       /*    */
  78
  79                         /* Single glyphs in both cases */
  80                         [SPECIAL_GLYPH_TRIANGULAR_BULLET]       = "\342\200\243",             /* ‣ */
  81                         [SPECIAL_GLYPH_BLACK_CIRCLE]            = "\342\227\217",             /* ● */
  82                         [SPECIAL_GLYPH_WHITE_CIRCLE]            = "\u25CB",                   /* ○ */
  83                         [SPECIAL_GLYPH_MULTIPLICATION_SIGN]     = "\u00D7",                   /* × */
  84                         [SPECIAL_GLYPH_CIRCLE_ARROW]            = "\u21BB",                   /* ↻ */
  85                         [SPECIAL_GLYPH_BULLET]                  = "\342\200\242",             /* • */
  86                         [SPECIAL_GLYPH_MU]                      = "\316\274",                 /* μ (actually called: GREEK SMALL LETTER MU) */
  87                         [SPECIAL_GLYPH_CHECK_MARK]              = "\342\234\223",             /* ✓ */
  88                         [SPECIAL_GLYPH_CROSS_MARK]              = "\342\234\227",             /* ✗ (actually called: BALLOT X) */
  89                         [SPECIAL_GLYPH_LIGHT_SHADE]             = "\342\226\221",             /* ░ */
  90                         [SPECIAL_GLYPH_DARK_SHADE]              = "\342\226\223",             /* ▒ */
  91                         [SPECIAL_GLYPH_SIGMA]                   = "\316\243",                 /* Σ */
  92
  93                         /* Single glyph in Unicode, two in ASCII */
  94                         [SPECIAL_GLYPH_ARROW]                   = "\342\206\222",             /* → (actually called: RIGHTWARDS ARROW) */
  95
  96                         /* Single glyph in Unicode, three in ASCII */
  97                         [SPECIAL_GLYPH_ELLIPSIS]                = "\342\200\246",             /* … (actually called: HORIZONTAL ELLIPSIS) */
  98
  99                         /* Three glyphs in Unicode, five in ASCII */
 100                         [SPECIAL_GLYPH_EXTERNAL_LINK]           = "[\360\237\241\225]",       /* 🡕 (actually called: NORTH EAST SANS-SERIF ARROW, enclosed in []) */
 101
 102                         /* These smileys are a single glyph in Unicode, and three in ASCII */
 103                         [SPECIAL_GLYPH_ECSTATIC_SMILEY]         = "\360\237\230\207",         /* 😇 (actually called: SMILING FACE WITH HALO) */
 104                         [SPECIAL_GLYPH_HAPPY_SMILEY]            = "\360\237\230\200",         /* 😀 (actually called: GRINNING FACE) */
 105                         [SPECIAL_GLYPH_SLIGHTLY_HAPPY_SMILEY]   = "\360\237\231\202",         /* 🙂 (actually called: SLIGHTLY SMILING FACE) */
 106                         [SPECIAL_GLYPH_NEUTRAL_SMILEY]          = "\360\237\230\220",         /* 😐 (actually called: NEUTRAL FACE) */
 107                         [SPECIAL_GLYPH_SLIGHTLY_UNHAPPY_SMILEY] = "\360\237\231\201",         /* 🙁 (actually called: SLIGHTLY FROWNING FACE) */
 108                         [SPECIAL_GLYPH_UNHAPPY_SMILEY]          = "\360\237\230\250",         /* 😨 (actually called: FEARFUL FACE) */
 109                         [SPECIAL_GLYPH_DEPRESSED_SMILEY]        = "\360\237\244\242",         /* 🤢 (actually called: NAUSEATED FACE) */
 110
 111                         /* This emoji is a single character cell glyph in Unicode, and three in ASCII */
 112                         [SPECIAL_GLYPH_LOCK_AND_KEY]            = "\360\237\224\220",         /* 🔐 (actually called: CLOSED LOCK WITH KEY) */
 113
 114                         /* This emoji is a single character cell glyph in Unicode, and two in ASCII */
 115                         [SPECIAL_GLYPH_TOUCH]                   = "\360\237\221\206",         /* 👆 (actually called: BACKHAND INDEX POINTING UP) */
 116
 117                         /* These three emojis are single character cell glyphs in Unicode and also in ASCII. */
 118                         [SPECIAL_GLYPH_RECYCLING]               = "\u267B\uFE0F ",            /* ♻️  (actually called: UNIVERSAL RECYCLNG SYMBOL) */
 119                         [SPECIAL_GLYPH_DOWNLOAD]                = "\u2935\uFE0F ",            /* ⤵️  (actually called: RIGHT ARROW CURVING DOWN) */
 120                         [SPECIAL_GLYPH_SPARKLES]                = "\u2728",                   /* ✨ */
 121                 },
 122         };
 123
 124         if (code < 0)
 125                 return NULL;
 126
 127         assert(code < _SPECIAL_GLYPH_MAX);
 128         return draw_table[code >= _SPECIAL_GLYPH_FIRST_EMOJI ? emoji_enabled() : is_locale_utf8()][code];
 129 }