mirror of
https://github.com/rwinkhart/MUTN.git
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82 lines
2.8 KiB
Go
82 lines
2.8 KiB
Go
//go:build !windows && !darwin && !termux && !wsl
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package backend
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import (
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"fmt"
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"os"
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"os/exec"
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"strings"
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"time"
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)
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// copyField copies a field from an entry to the clipboard
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func copyField(executableName, copySubject string) {
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var envSet bool // track whether environment variables are set
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var cmd *exec.Cmd
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// determine whether to use wl-copy (Wayland) or xclip (X11)
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if _, envSet = os.LookupEnv("WAYLAND_DISPLAY"); envSet {
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cmd = exec.Command("wl-copy")
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} else if _, envSet = os.LookupEnv("DISPLAY"); envSet {
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cmd = exec.Command("xclip", "-sel", "c")
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} else {
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fmt.Println(AnsiError + "Clipboard platform could not be determined - note that the clipboard does not function in a raw TTY" + AnsiReset)
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os.Exit(1)
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}
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writeToStdin(cmd, copySubject)
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err := cmd.Run()
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if err != nil {
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fmt.Println(AnsiError + "Failed to copy to clipboard: " + err.Error() + AnsiReset)
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os.Exit(1)
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}
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// launch clipboard clearing process if executableName is provided
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if executableName != "" {
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cmd = exec.Command(executableName, "clipclear")
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writeToStdin(cmd, copySubject)
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err = cmd.Start()
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if err != nil {
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fmt.Println(AnsiError + "Failed to launch automated clipboard clearing process - does this libmutton implementation support the \"clipclear\" argument?" + AnsiReset)
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os.Exit(1)
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}
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Exit(0) // only exit if clipboard clearing process is launched, otherwise assume continuous clipboard refresh
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}
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}
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// clipClear is called in a separate process to clear the clipboard after 30 seconds
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func clipClear(oldContents string) {
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time.Sleep(30 * time.Second)
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// determine clipboard tool to use (wl-clipboard VS xclip)
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var envSet bool
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var cmdClear, cmdPaste *exec.Cmd
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if _, envSet = os.LookupEnv("WAYLAND_DISPLAY"); envSet {
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cmdClear = exec.Command("wl-copy", "-c")
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cmdPaste = exec.Command("wl-paste")
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} else if _, envSet = os.LookupEnv("DISPLAY"); envSet {
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cmdClear = exec.Command("xclip", "-i", "/dev/null", "-sel", "c")
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cmdPaste = exec.Command("xclip", "-o", "-sel", "c")
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} else {
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fmt.Println(AnsiError + "Clipboard platform could not be determined - neither $WAYLAND_DISPLAY nor $DISPLAY are set" + AnsiReset)
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os.Exit(1)
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}
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// read current clipboard contents
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newContents, err := cmdPaste.Output()
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if err != nil {
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fmt.Println(AnsiError + "Failed to read clipboard contents: " + err.Error() + AnsiReset)
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os.Exit(1)
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}
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// clear clipboard if contents have not been modified
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if oldContents == strings.TrimRight(string(newContents), "\r\n") {
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err = cmdClear.Run()
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if err != nil {
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fmt.Println(AnsiError + "Failed to clear clipboard: " + err.Error() + AnsiReset)
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os.Exit(1)
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}
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}
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os.Exit(0) // use os.Exit instead of backend.Exit, as this function runs out of a background subprocess that is invisible to the user (will never appear in GUI/TUI environment)
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}
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