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// SPDX-License-Identifier: GPL-3.0-or-later
package main
import (
"fmt"
"io"
"strings"
"krino/internal/tui"
)
// palette styles text for a terminal (spec §8.2) with SGR codes from the
// 16-colour ANSI palette plus bold and faint only, so the terminal's own
// theme decides what they look like. The zero value is plain: every method
// returns its text unchanged, which keeps output with colour off
// byte-identical to what krino printed before colour existed.
type palette struct{ on bool }
func (p palette) style(code, s string) string {
if !p.on || s == "" {
return s
}
return "\x1b[" + code + "m" + s + "\x1b[0m"
}
func (p palette) bold(s string) string { return p.style("1", s) }
func (p palette) faint(s string) string { return p.style("2", s) }
func (p palette) bad(s string) string { return p.style("31", s) }
func (p palette) good(s string) string { return p.style("32", s) }
func (p palette) warn(s string) string { return p.style("33", s) }
func (p palette) rule(s string) string { return p.style("34", s) }
func (p palette) alarm(s string) string { return p.style("1;31", s) }
// keys bolds every one-character [x] key in a prompt line.
func (p palette) keys(menu string) string {
if !p.on {
return menu
}
var b strings.Builder
for i := 0; i < len(menu); {
if menu[i] == '[' && i+2 < len(menu) && menu[i+2] == ']' {
b.WriteString(p.bold(menu[i : i+3]))
i += 3
continue
}
b.WriteByte(menu[i])
i++
}
return b.String()
}
// outcome renders the "N applied · N failed · N declined" line: the applied
// count green and the failed count red, each only when above 0.
func outcome(p palette, applied, failed, declined int) string {
a, f := fmt.Sprint(applied), fmt.Sprint(failed)
if applied > 0 {
a = p.good(a)
}
if failed > 0 {
f = p.bad(f)
}
return fmt.Sprintf("%s applied · %s failed · %d declined", a, f, declined)
}
// colourPolicy is tui.Colour (terminal, and NO_COLOR unset); tests replace
// it, since no test runs on a terminal.
var colourPolicy = tui.Colour
// widthPolicy is tui.Width, the terminal's columns (0: never wrap); pager
// is tui.Page. Tests replace both, for the same reason.
var (
widthPolicy = tui.Width
pager = tui.Page
)
// show writes text to w: straight out with -P (--no-pager), otherwise
// through the pager, which only engages when text is taller than the
// terminal.
func show(g *globals, w io.Writer, text string) error {
if g.noPager {
_, err := io.WriteString(w, text)
return err
}
return pager(w, text)
}
// colourOn reports whether output to w is coloured: never with --no-color,
// otherwise as colourPolicy decides.
func colourOn(g *globals, w io.Writer) bool {
return !g.noColor && colourPolicy(w)
}
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