Zbigniew Jędrzejewski-Szmek
7a14db9cfd
$TERM would generally be set if we're connected to a proper graphical terminal emulator. In all other cases, in particular if $TERM is not set, we almost certainly are not connected to something that can output emojis. In particular the text console is unlikely to ever do it correctly. So let's invert the check, and only write emojis if $TERM is set. Fixes #25521.
142 lines
8.7 KiB
C
142 lines
8.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include "env-util.h"
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#include "glyph-util.h"
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#include "locale-util.h"
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#include "strv.h"
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bool emoji_enabled(void) {
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static int cached_emoji_enabled = -1;
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if (cached_emoji_enabled < 0) {
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int val = getenv_bool("SYSTEMD_EMOJI");
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if (val >= 0)
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return (cached_emoji_enabled = val);
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const char *term = getenv("TERM");
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if (!term || STR_IN_SET(term, "dumb", "linux"))
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return (cached_emoji_enabled = false);
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cached_emoji_enabled = is_locale_utf8();
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}
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return cached_emoji_enabled;
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}
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const char *special_glyph(SpecialGlyph code) {
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/* A list of a number of interesting unicode glyphs we can use to decorate our output. It's probably wise to be
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* conservative here, and primarily stick to the glyphs defined in the eurlatgr font, so that display still
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* works reasonably well on the Linux console. For details see:
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*
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* http://git.altlinux.org/people/legion/packages/kbd.git?p=kbd.git;a=blob;f=data/consolefonts/README.eurlatgr
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*/
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static const char* const draw_table[2][_SPECIAL_GLYPH_MAX] = {
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/* ASCII fallback */
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[false] = {
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[SPECIAL_GLYPH_TREE_VERTICAL] = "| ",
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[SPECIAL_GLYPH_TREE_BRANCH] = "|-",
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[SPECIAL_GLYPH_TREE_RIGHT] = "`-",
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[SPECIAL_GLYPH_TREE_SPACE] = " ",
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[SPECIAL_GLYPH_TREE_TOP] = ",-",
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[SPECIAL_GLYPH_VERTICAL_DOTTED] = ":",
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[SPECIAL_GLYPH_TRIANGULAR_BULLET] = ">",
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[SPECIAL_GLYPH_BLACK_CIRCLE] = "*",
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[SPECIAL_GLYPH_WHITE_CIRCLE] = "*",
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[SPECIAL_GLYPH_MULTIPLICATION_SIGN] = "x",
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[SPECIAL_GLYPH_CIRCLE_ARROW] = "*",
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[SPECIAL_GLYPH_BULLET] = "*",
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[SPECIAL_GLYPH_MU] = "u",
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[SPECIAL_GLYPH_CHECK_MARK] = "+",
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[SPECIAL_GLYPH_CROSS_MARK] = "-",
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[SPECIAL_GLYPH_LIGHT_SHADE] = "-",
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[SPECIAL_GLYPH_DARK_SHADE] = "X",
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[SPECIAL_GLYPH_SIGMA] = "S",
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[SPECIAL_GLYPH_ARROW_LEFT] = "<-",
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[SPECIAL_GLYPH_ARROW_RIGHT] = "->",
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[SPECIAL_GLYPH_ARROW_UP] = "^",
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[SPECIAL_GLYPH_ARROW_DOWN] = "v",
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[SPECIAL_GLYPH_ELLIPSIS] = "...",
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[SPECIAL_GLYPH_EXTERNAL_LINK] = "[LNK]",
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[SPECIAL_GLYPH_ECSTATIC_SMILEY] = ":-]",
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[SPECIAL_GLYPH_HAPPY_SMILEY] = ":-}",
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[SPECIAL_GLYPH_SLIGHTLY_HAPPY_SMILEY] = ":-)",
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[SPECIAL_GLYPH_NEUTRAL_SMILEY] = ":-|",
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[SPECIAL_GLYPH_SLIGHTLY_UNHAPPY_SMILEY] = ":-(",
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[SPECIAL_GLYPH_UNHAPPY_SMILEY] = ":-{",
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[SPECIAL_GLYPH_DEPRESSED_SMILEY] = ":-[",
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[SPECIAL_GLYPH_LOCK_AND_KEY] = "o-,",
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[SPECIAL_GLYPH_TOUCH] = "O=", /* Yeah, not very convincing, can you do it better? */
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[SPECIAL_GLYPH_RECYCLING] = "~",
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[SPECIAL_GLYPH_DOWNLOAD] = "\\",
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[SPECIAL_GLYPH_SPARKLES] = "*",
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[SPECIAL_GLYPH_WARNING_SIGN] = "!",
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},
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/* UTF-8 */
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[true] = {
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/* The following are multiple glyphs in both ASCII and in UNICODE */
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[SPECIAL_GLYPH_TREE_VERTICAL] = u8"│ ",
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[SPECIAL_GLYPH_TREE_BRANCH] = u8"├─",
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[SPECIAL_GLYPH_TREE_RIGHT] = u8"└─",
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[SPECIAL_GLYPH_TREE_SPACE] = u8" ",
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[SPECIAL_GLYPH_TREE_TOP] = u8"┌─",
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/* Single glyphs in both cases */
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[SPECIAL_GLYPH_VERTICAL_DOTTED] = u8"┆",
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[SPECIAL_GLYPH_TRIANGULAR_BULLET] = u8"‣",
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[SPECIAL_GLYPH_BLACK_CIRCLE] = u8"●",
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[SPECIAL_GLYPH_WHITE_CIRCLE] = u8"○",
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[SPECIAL_GLYPH_MULTIPLICATION_SIGN] = u8"×",
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[SPECIAL_GLYPH_CIRCLE_ARROW] = u8"↻",
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[SPECIAL_GLYPH_BULLET] = u8"•",
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[SPECIAL_GLYPH_MU] = u8"μ", /* actually called: GREEK SMALL LETTER MU */
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[SPECIAL_GLYPH_CHECK_MARK] = u8"✓",
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[SPECIAL_GLYPH_CROSS_MARK] = u8"✗", /* actually called: BALLOT X */
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[SPECIAL_GLYPH_LIGHT_SHADE] = u8"░",
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[SPECIAL_GLYPH_DARK_SHADE] = u8"▒",
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[SPECIAL_GLYPH_SIGMA] = u8"Σ",
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[SPECIAL_GLYPH_ARROW_UP] = u8"↑", /* actually called: UPWARDS ARROW */
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[SPECIAL_GLYPH_ARROW_DOWN] = u8"↓", /* actually called: DOWNWARDS ARROW */
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/* Single glyph in Unicode, two in ASCII */
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[SPECIAL_GLYPH_ARROW_LEFT] = u8"←", /* actually called: LEFTWARDS ARROW */
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[SPECIAL_GLYPH_ARROW_RIGHT] = u8"→", /* actually called: RIGHTWARDS ARROW */
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/* Single glyph in Unicode, three in ASCII */
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[SPECIAL_GLYPH_ELLIPSIS] = u8"…", /* actually called: HORIZONTAL ELLIPSIS */
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/* Three glyphs in Unicode, five in ASCII */
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[SPECIAL_GLYPH_EXTERNAL_LINK] = u8"[🡕]", /* actually called: NORTH EAST SANS-SERIF ARROW, enclosed in [] */
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/* These smileys are a single glyph in Unicode, and three in ASCII */
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[SPECIAL_GLYPH_ECSTATIC_SMILEY] = u8"😇", /* actually called: SMILING FACE WITH HALO */
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[SPECIAL_GLYPH_HAPPY_SMILEY] = u8"😀", /* actually called: GRINNING FACE */
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[SPECIAL_GLYPH_SLIGHTLY_HAPPY_SMILEY] = u8"🙂", /* actually called: SLIGHTLY SMILING FACE */
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[SPECIAL_GLYPH_NEUTRAL_SMILEY] = u8"😐", /* actually called: NEUTRAL FACE */
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[SPECIAL_GLYPH_SLIGHTLY_UNHAPPY_SMILEY] = u8"🙁", /* actually called: SLIGHTLY FROWNING FACE */
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[SPECIAL_GLYPH_UNHAPPY_SMILEY] = u8"😨", /* actually called: FEARFUL FACE */
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[SPECIAL_GLYPH_DEPRESSED_SMILEY] = u8"🤢", /* actually called: NAUSEATED FACE */
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/* This emoji is a single character cell glyph in Unicode, and three in ASCII */
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[SPECIAL_GLYPH_LOCK_AND_KEY] = u8"🔐", /* actually called: CLOSED LOCK WITH KEY */
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/* This emoji is a single character cell glyph in Unicode, and two in ASCII */
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[SPECIAL_GLYPH_TOUCH] = u8"👆", /* actually called: BACKHAND INDEX POINTING UP */
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/* These four emojis are single character cell glyphs in Unicode and also in ASCII. */
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[SPECIAL_GLYPH_RECYCLING] = u8"♻️", /* actually called: UNIVERSAL RECYCLNG SYMBOL */
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[SPECIAL_GLYPH_DOWNLOAD] = u8"⤵️", /* actually called: RIGHT ARROW CURVING DOWN */
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[SPECIAL_GLYPH_SPARKLES] = u8"✨",
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[SPECIAL_GLYPH_WARNING_SIGN] = u8"⚠️",
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},
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};
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if (code < 0)
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return NULL;
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assert(code < _SPECIAL_GLYPH_MAX);
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return draw_table[code >= _SPECIAL_GLYPH_FIRST_EMOJI ? emoji_enabled() : is_locale_utf8()][code];
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}
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