106 lines
2.5 KiB
Go
106 lines
2.5 KiB
Go
package main
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
func selector(data []string, max int, tool string) (string, error) {
|
|
if len(data) == 0 {
|
|
return "", errors.New("no data available")
|
|
}
|
|
|
|
// output to stdout and return
|
|
if tool == "STDOUT" {
|
|
escaped, _ := preprocessData(data, false, true)
|
|
os.Stdout.WriteString(strings.Join(escaped, "\n"))
|
|
return "", nil
|
|
}
|
|
|
|
bin, err := exec.LookPath(tool)
|
|
if err != nil {
|
|
return "", fmt.Errorf("%s is not installed", tool)
|
|
}
|
|
|
|
var args []string
|
|
switch tool {
|
|
case "dmenu":
|
|
args = []string{"dmenu", "-b",
|
|
"-fn",
|
|
"-misc-dejavu sans mono-medium-r-normal--17-120-100-100-m-0-iso8859-16",
|
|
"-l",
|
|
strconv.Itoa(max)}
|
|
case "rofi":
|
|
args = []string{"rofi", "-dmenu",
|
|
"-lines",
|
|
strconv.Itoa(max)}
|
|
case "wofi":
|
|
args = []string{"wofi", "--show", "dmenu", strconv.Itoa(max)}
|
|
default:
|
|
return "", fmt.Errorf("Unsupported tool: %s", tool)
|
|
}
|
|
|
|
processed, guide := preprocessData(data, true, false)
|
|
|
|
cmd := exec.Cmd{Path: bin, Args: args, Stdin: strings.NewReader(strings.Join(processed, "\n"))}
|
|
b, err := cmd.CombinedOutput()
|
|
if err != nil {
|
|
if err.Error() == "exit status 1" {
|
|
// dmenu/rofi exits with this error when no selection done
|
|
return "", nil
|
|
}
|
|
return "", err
|
|
}
|
|
|
|
// Wofi however does not error when no selection is done
|
|
if len(b) == 0 {
|
|
return "", nil
|
|
}
|
|
|
|
selected := string(b[:len(b)-1]) // drop newline added by dmenu/rofi/wofi
|
|
|
|
sel, ok := guide[selected]
|
|
if !ok {
|
|
return "", errors.New("couldn't recover original string")
|
|
}
|
|
|
|
return sel, nil
|
|
}
|
|
|
|
// preprocessData:
|
|
// - reverses the data
|
|
// - escapes \n (it would break external selectors)
|
|
// - optionally it cuts items longer than 400 bytes (dmenu doesn't allow more than ~1200)
|
|
// A guide is created to allow restoring the selected item.
|
|
func preprocessData(data []string, cutting bool, allowTabs bool) ([]string, map[string]string) {
|
|
var escaped []string
|
|
guide := make(map[string]string)
|
|
|
|
for i := len(data) - 1; i >= 0; i-- { // reverse slice
|
|
original := data[i]
|
|
|
|
// escape newlines
|
|
repr := strings.ReplaceAll(original, "\\n", "\\\\n") // preserve literal \n
|
|
repr = strings.ReplaceAll(repr, "\n", "\\n")
|
|
|
|
if !allowTabs {
|
|
repr = strings.ReplaceAll(repr, "\\t", "\\\\t")
|
|
repr = strings.ReplaceAll(repr, "\t", "\\t")
|
|
}
|
|
|
|
// optionally cut to maxChars
|
|
const maxChars = 400
|
|
if cutting && len(repr) > maxChars {
|
|
repr = repr[:maxChars]
|
|
}
|
|
|
|
guide[repr] = original
|
|
escaped = append(escaped, repr)
|
|
}
|
|
|
|
return escaped, guide
|
|
}
|