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|
// Application infocmp should have the same output as the standard Unix infocmp
// -1 -L output.
package main
import (
"flag"
"fmt"
"log"
"os"
"sort"
"strings"
"unicode"
"github.com/xo/terminfo"
)
var (
flagTerm = flag.String("term", os.Getenv("TERM"), "term name")
flagExtended = flag.Bool("x", false, "extended options")
)
func main() {
flag.Parse()
ti, err := terminfo.Load(*flagTerm)
if err != nil {
log.Fatal(err)
}
fmt.Printf("#\tReconstructed via %s from file: %s\n", strings.TrimPrefix(os.Args[0], "./"), ti.File)
fmt.Printf("%s,\n", strings.TrimSpace(strings.Join(ti.Names, "|")))
process(ti.BoolCaps, ti.ExtBoolCaps, ti.BoolsM, terminfo.BoolCapName, nil)
process(
ti.NumCaps, ti.ExtNumCaps, ti.NumsM, terminfo.NumCapName,
func(v interface{}) string { return fmt.Sprintf("#%d", v) },
)
process(
ti.StringCaps, ti.ExtStringCaps, ti.StringsM, terminfo.StringCapName,
func(v interface{}) string { return "=" + escape(v.([]byte)) },
)
}
func process(x, y interface{}, m map[int]bool, name func(int) string, mask func(interface{}) string) {
printIt(x, m, name, mask)
if *flagExtended {
printIt(y, nil, name, mask)
}
}
// process walks the values in z, adding missing elements in m. a mask func can
// be provided to format the values in z.
func printIt(z interface{}, m map[int]bool, name func(int) string, mask func(interface{}) string) {
var names []string
x := make(map[string]string)
switch v := z.(type) {
case func() map[string]bool:
for n, a := range v() {
if !a {
continue
}
var f string
if mask != nil {
f = mask(a)
}
x[n], names = f, append(names, n)
}
case func() map[string]int:
for n, a := range v() {
if a < 0 {
continue
}
var f string
if mask != nil {
f = mask(a)
}
x[n], names = f, append(names, n)
}
case func() map[string][]byte:
for n, a := range v() {
if a == nil {
continue
}
var f string
if mask != nil {
f = mask(a)
}
if n == "acs_chars" && strings.TrimSpace(strings.TrimPrefix(f, "=")) == "" {
continue
}
x[n], names = f, append(names, n)
}
}
// add missing
for i := range m {
n := name(i)
x[n], names = "@", append(names, n)
}
// sort and print
sort.Strings(names)
for _, n := range names {
fmt.Printf("\t%s%s,\n", n, x[n])
}
}
// peek peeks a byte.
func peek(b []byte, pos, length int) byte {
if pos < length {
return b[pos]
}
return 0
}
func isprint(b byte) bool {
return unicode.IsPrint(rune(b))
}
func realprint(b byte) bool {
return b < 127 && isprint(b)
}
func iscntrl(b byte) bool {
return unicode.IsControl(rune(b))
}
func realctl(b byte) bool {
return b < 127 && iscntrl(b)
}
func isdigit(b byte) bool {
return unicode.IsDigit(rune(b))
}
// logic taken from _nc_tic_expand from ncurses-6.0/ncurses/tinfo/comp_expand.c
func escape(buf []byte) string {
length := len(buf)
if length == 0 {
return ""
}
var s []byte
islong := length > 3
for i := 0; i < length; i++ {
ch := buf[i]
switch {
case ch == '%' && realprint(peek(buf, i+1, length)):
s = append(s, buf[i], buf[i+1])
i++
case ch == 128:
s = append(s, '\\', '0')
case ch == '\033':
s = append(s, '\\', 'E')
case realprint(ch) && ch != ',' && ch != ':' && ch != '!' && ch != '^':
s = append(s, ch)
case ch == '\r' && (islong || (i == length-1 && length > 2)):
s = append(s, '\\', 'r')
case ch == '\n' && islong:
s = append(s, '\\', 'n')
case realctl(ch) && ch != '\\' && (!islong || isdigit(peek(buf, i+1, length))):
s = append(s, '^', ch+'@')
default:
s = append(s, []byte(fmt.Sprintf("\\%03o", ch))...)
}
}
return string(s)
}
|
