fmt.v

1//! Presentation primitives shared by the two places Koh prints: the command2//! line and the full-screen history view.3//!4//! Colour lives here so both surfaces use one palette, and `NO_COLOR` /5//! `KOH_NO_COLOR` turn it off for both at once.67module fmt89import os10import time1112pub const glyph_ok = '✦'13pub const glyph_fail = '✗'1415pub fn colour_enabled() bool {16	if os.getenv('NO_COLOR') != '' || os.getenv('KOH_NO_COLOR') != '' {17		return false18	}19	return os.is_atty(1) != 020}2122fn paint(text string, code string) string {23	if !colour_enabled() {24		return text25	}26	return '\x1b[${code}m${text}\x1b[0m'27}2829pub fn bold(text string) string {30	return paint(text, '1')31}3233pub fn reverse(text string) string {34	return paint(text, '7')35}3637pub fn amber(text string) string {38	return paint(text, '38;5;214')39}4041pub fn red(text string) string {42	return paint(text, '38;5;203')43}4445pub fn green(text string) string {46	return paint(text, '38;5;114')47}4849pub fn dim(text string) string {50	return paint(text, '38;5;245')51}5253// The history view keeps Koh 2's softer palette: gold for the selected save,54// muted grey for everything around it, blue for HEAD.55pub fn gold(text string) string {56	return paint(text, '38;5;179')57}5859pub fn muted(text string) string {60	return paint(text, '38;5;241')61}6263pub fn blue(text string) string {64	return paint(text, '38;5;110')65}6667// strip_ansi removes the colour codes, for measuring how wide a line really is.68pub fn strip_ansi(text string) string {69	mut out := ''70	mut skipping := false71	for c in text.runes() {72		if c == `\x1b` {73			skipping = true74			continue75		}76		if skipping {77			if (c >= `a` && c <= `z`) || (c >= `A` && c <= `Z`) {78				skipping = false79			}80			continue81		}82		out += c.str()83	}84	return out85}8687pub fn visible_width(text string) int {88	return strip_ansi(text).runes().len89}9091// fit cuts a line to `width` visible columns and keeps its colour codes, so a92// long line can never wrap and scroll a full-screen frame.93pub fn fit(text string, width int) string {94	if visible_width(text) <= width {95		return text96	}97	mut out := []rune{}98	mut shown := 099	mut skipping := false100	for c in text.runes() {101		if c == `\x1b` {102			skipping = true103		}104		if skipping {105			out << c106			if (c >= `a` && c <= `z`) || (c >= `A` && c <= `Z`) {107				skipping = false108			}109			continue110		}111		if shown == width {112			break113		}114		out << c115		shown++116	}117	cut := out.string()118	return if cut.contains('\x1b') { cut + '\x1b[0m' } else { cut }119}120121pub fn stamp(unix_seconds i64) string {122	return time.unix(unix_seconds).local().format()123}124125pub fn date_of(unix_seconds i64) string {126	return time.unix(unix_seconds).local().ymmdd()127}128129pub fn hour_of(unix_seconds i64) string {130	return time.unix(unix_seconds).local().hhmm()131}132133pub fn clock_of(unix_seconds i64) string {134	return time.unix(unix_seconds).local().hhmmss()135}136137pub fn human_bytes(bytes i64) string {138	mut value := f64(bytes)139	mut unit := 'B'140	for suffix in ['KiB', 'MiB', 'GiB'] {141		if value < 1024 {142			break143		}144		value /= 1024145		unit = suffix146	}147	if unit == 'B' {148		return '${bytes} B'149	}150	return '${value:.1f} ${unit}'151}152153// plural renders "1 file" / "3 files".154pub fn plural(count int, noun string) string {155	if count == 1 {156		return '1 ${noun}'157	}158	return '${count} ${noun}s'159}