88 lines
2 KiB
Go
88 lines
2 KiB
Go
package main
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import (
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"fmt"
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"os/exec"
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"strconv"
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"strings"
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)
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func selector(history []string, max int, tool string) error {
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// reverse the history
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for i, j := 0, len(history)-1; i < j; i, j = i+1, j-1 {
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history[i], history[j] = history[j], history[i]
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}
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selected, err := dmenu(history, max, tool)
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if err != nil {
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return err
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}
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// serve selection to the OS
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err = exec.Command("wl-copy", []string{"--", selected}...).Run()
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return err
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}
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func dmenu(list []string, max int, tool string) (string, error) {
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if len(list) == 0 {
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return "", nil
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}
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bin, err := exec.LookPath("/usr/bin/" + tool)
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if err != nil {
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return "", fmt.Errorf("%s is not installed", tool)
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}
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var args []string
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if tool == "dmenu" {
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args = []string{"dmenu", "-b",
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"-fn",
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"-misc-dejavu sans mono-medium-r-normal--17-120-100-100-m-0-iso8859-16",
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"-l",
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strconv.Itoa(max)}
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} else {
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args = []string{"rofi", "-dmenu",
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"-lines",
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strconv.Itoa(max)}
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}
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// dmenu will break if items contain newlines, so we must pass them as literals.
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// however, when it sends them back, we need a way to restore them
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guide := make(map[string]string)
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escaped := []string{}
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for _, original := range list {
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repr := fmt.Sprintf("%#v", original)
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// dmenu will split lines longer than 1200 something; we cut at 400 to spare memory
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max := len(repr) - 1 // drop right quote
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maxChars := 400
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if max > maxChars {
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max = maxChars
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}
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repr = repr[1:max] // drop left quote
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guide[repr] = original
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escaped = append(escaped, repr)
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}
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input := strings.NewReader(strings.Join(escaped, "\n"))
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cmd := exec.Cmd{Path: bin, Args: args, Stdin: input}
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selected, err := cmd.Output()
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if err != nil {
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if err.Error() == "exit status 1" {
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// dmenu exits with this error when no selection done
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return "", nil
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}
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return "", err
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}
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trimmed := selected[:len(selected)-1] // drop newline added by dmenu
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sel, ok := guide[string(trimmed)]
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if !ok {
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return "", fmt.Errorf("couldn't recover original string; please report this bug along with a copy of your clipman.json")
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}
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return sel, nil
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}
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