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Diffstat (limited to 'src/basic/glyph-util.c')
| -rw-r--r-- | src/basic/glyph-util.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/basic/glyph-util.c b/src/basic/glyph-util.c new file mode 100644 index 0000000..7e26edb --- /dev/null +++ b/src/basic/glyph-util.c @@ -0,0 +1,139 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "env-util.h" +#include "glyph-util.h" +#include "locale-util.h" +#include "strv.h" + +bool emoji_enabled(void) { + static int cached_emoji_enabled = -1; + + if (cached_emoji_enabled < 0) { + int val = getenv_bool("SYSTEMD_EMOJI"); + if (val >= 0) + return (cached_emoji_enabled = val); + + const char *term = getenv("TERM"); + if (!term || STR_IN_SET(term, "dumb", "linux")) + return (cached_emoji_enabled = false); + + cached_emoji_enabled = is_locale_utf8(); + } + + return cached_emoji_enabled; +} + +const char *special_glyph(SpecialGlyph code) { + + /* A list of a number of interesting unicode glyphs we can use to decorate our output. It's probably wise to be + * conservative here, and primarily stick to the glyphs defined in the eurlatgr font, so that display still + * works reasonably well on the Linux console. For details see: + * + * http://git.altlinux.org/people/legion/packages/kbd.git?p=kbd.git;a=blob;f=data/consolefonts/README.eurlatgr + */ + + static const char* const draw_table[2][_SPECIAL_GLYPH_MAX] = { + /* ASCII fallback */ + [false] = { + [SPECIAL_GLYPH_TREE_VERTICAL] = "| ", + [SPECIAL_GLYPH_TREE_BRANCH] = "|-", + [SPECIAL_GLYPH_TREE_RIGHT] = "`-", + [SPECIAL_GLYPH_TREE_SPACE] = " ", + [SPECIAL_GLYPH_TREE_TOP] = ",-", + [SPECIAL_GLYPH_VERTICAL_DOTTED] = ":", + [SPECIAL_GLYPH_TRIANGULAR_BULLET] = ">", + [SPECIAL_GLYPH_BLACK_CIRCLE] = "*", + [SPECIAL_GLYPH_WHITE_CIRCLE] = "*", + [SPECIAL_GLYPH_MULTIPLICATION_SIGN] = "x", + [SPECIAL_GLYPH_CIRCLE_ARROW] = "*", + [SPECIAL_GLYPH_BULLET] = "*", + [SPECIAL_GLYPH_MU] = "u", + [SPECIAL_GLYPH_CHECK_MARK] = "+", + [SPECIAL_GLYPH_CROSS_MARK] = "-", + [SPECIAL_GLYPH_LIGHT_SHADE] = "-", + [SPECIAL_GLYPH_DARK_SHADE] = "X", + [SPECIAL_GLYPH_SIGMA] = "S", + [SPECIAL_GLYPH_ARROW_LEFT] = "<-", + [SPECIAL_GLYPH_ARROW_RIGHT] = "->", + [SPECIAL_GLYPH_ARROW_UP] = "^", + [SPECIAL_GLYPH_ARROW_DOWN] = "v", + [SPECIAL_GLYPH_ELLIPSIS] = "...", + [SPECIAL_GLYPH_EXTERNAL_LINK] = "[LNK]", + [SPECIAL_GLYPH_ECSTATIC_SMILEY] = ":-]", + [SPECIAL_GLYPH_HAPPY_SMILEY] = ":-}", + [SPECIAL_GLYPH_SLIGHTLY_HAPPY_SMILEY] = ":-)", + [SPECIAL_GLYPH_NEUTRAL_SMILEY] = ":-|", + [SPECIAL_GLYPH_SLIGHTLY_UNHAPPY_SMILEY] = ":-(", + [SPECIAL_GLYPH_UNHAPPY_SMILEY] = ":-{", + [SPECIAL_GLYPH_DEPRESSED_SMILEY] = ":-[", + [SPECIAL_GLYPH_LOCK_AND_KEY] = "o-,", + [SPECIAL_GLYPH_TOUCH] = "O=", /* Yeah, not very convincing, can you do it better? */ + [SPECIAL_GLYPH_RECYCLING] = "~", + [SPECIAL_GLYPH_DOWNLOAD] = "\\", + [SPECIAL_GLYPH_SPARKLES] = "*", + }, + + /* UTF-8 */ + [true] = { + /* The following are multiple glyphs in both ASCII and in UNICODE */ + [SPECIAL_GLYPH_TREE_VERTICAL] = u8"│ ", + [SPECIAL_GLYPH_TREE_BRANCH] = u8"├─", + [SPECIAL_GLYPH_TREE_RIGHT] = u8"└─", + [SPECIAL_GLYPH_TREE_SPACE] = u8" ", + [SPECIAL_GLYPH_TREE_TOP] = u8"┌─", + + /* Single glyphs in both cases */ + [SPECIAL_GLYPH_VERTICAL_DOTTED] = u8"┆", + [SPECIAL_GLYPH_TRIANGULAR_BULLET] = u8"‣", + [SPECIAL_GLYPH_BLACK_CIRCLE] = u8"●", + [SPECIAL_GLYPH_WHITE_CIRCLE] = u8"○", + [SPECIAL_GLYPH_MULTIPLICATION_SIGN] = u8"×", + [SPECIAL_GLYPH_CIRCLE_ARROW] = u8"↻", + [SPECIAL_GLYPH_BULLET] = u8"•", + [SPECIAL_GLYPH_MU] = u8"μ", /* actually called: GREEK SMALL LETTER MU */ + [SPECIAL_GLYPH_CHECK_MARK] = u8"✓", + [SPECIAL_GLYPH_CROSS_MARK] = u8"✗", /* actually called: BALLOT X */ + [SPECIAL_GLYPH_LIGHT_SHADE] = u8"░", + [SPECIAL_GLYPH_DARK_SHADE] = u8"▒", + [SPECIAL_GLYPH_SIGMA] = u8"Σ", + [SPECIAL_GLYPH_ARROW_UP] = u8"↑", /* actually called: UPWARDS ARROW */ + [SPECIAL_GLYPH_ARROW_DOWN] = u8"↓", /* actually called: DOWNWARDS ARROW */ + + /* Single glyph in Unicode, two in ASCII */ + [SPECIAL_GLYPH_ARROW_LEFT] = u8"←", /* actually called: LEFTWARDS ARROW */ + [SPECIAL_GLYPH_ARROW_RIGHT] = u8"→", /* actually called: RIGHTWARDS ARROW */ + + /* Single glyph in Unicode, three in ASCII */ + [SPECIAL_GLYPH_ELLIPSIS] = u8"…", /* actually called: HORIZONTAL ELLIPSIS */ + + /* Three glyphs in Unicode, five in ASCII */ + [SPECIAL_GLYPH_EXTERNAL_LINK] = u8"[🡕]", /* actually called: NORTH EAST SANS-SERIF ARROW, enclosed in [] */ + + /* These smileys are a single glyph in Unicode, and three in ASCII */ + [SPECIAL_GLYPH_ECSTATIC_SMILEY] = u8"😇", /* actually called: SMILING FACE WITH HALO */ + [SPECIAL_GLYPH_HAPPY_SMILEY] = u8"😀", /* actually called: GRINNING FACE */ + [SPECIAL_GLYPH_SLIGHTLY_HAPPY_SMILEY] = u8"🙂", /* actually called: SLIGHTLY SMILING FACE */ + [SPECIAL_GLYPH_NEUTRAL_SMILEY] = u8"😐", /* actually called: NEUTRAL FACE */ + [SPECIAL_GLYPH_SLIGHTLY_UNHAPPY_SMILEY] = u8"🙁", /* actually called: SLIGHTLY FROWNING FACE */ + [SPECIAL_GLYPH_UNHAPPY_SMILEY] = u8"😨", /* actually called: FEARFUL FACE */ + [SPECIAL_GLYPH_DEPRESSED_SMILEY] = u8"🤢", /* actually called: NAUSEATED FACE */ + + /* This emoji is a single character cell glyph in Unicode, and three in ASCII */ + [SPECIAL_GLYPH_LOCK_AND_KEY] = u8"🔐", /* actually called: CLOSED LOCK WITH KEY */ + + /* This emoji is a single character cell glyph in Unicode, and two in ASCII */ + [SPECIAL_GLYPH_TOUCH] = u8"👆", /* actually called: BACKHAND INDEX POINTING UP */ + + /* These three emojis are single character cell glyphs in Unicode and also in ASCII. */ + [SPECIAL_GLYPH_RECYCLING] = u8"♻️", /* actually called: UNIVERSAL RECYCLNG SYMBOL */ + [SPECIAL_GLYPH_DOWNLOAD] = u8"⤵️", /* actually called: RIGHT ARROW CURVING DOWN */ + [SPECIAL_GLYPH_SPARKLES] = u8"✨", + }, + }; + + if (code < 0) + return NULL; + + assert(code < _SPECIAL_GLYPH_MAX); + return draw_table[code >= _SPECIAL_GLYPH_FIRST_EMOJI ? emoji_enabled() : is_locale_utf8()][code]; +} |