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// Copyright 2013 @atotto. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build freebsd linux netbsd openbsd solaris dragonfly
package clipboard
import (
"errors"
"os"
"os/exec"
)
const (
xsel = "xsel"
xclip = "xclip"
wlcopy = "wl-copy"
wlpaste = "wl-paste"
termuxClipboardGet = "termux-clipboard-get"
termuxClipboardSet = "termux-clipboard-set"
)
var (
pasteCmdArgs map[string][]string
copyCmdArgs map[string][]string
xselPasteArgs = map[string][]string{
"primary": []string{xsel, "--output"},
"clipboard": []string{xsel, "--output", "--clipboard"},
}
xselCopyArgs = map[string][]string{
"primary": []string{xsel, "--input"},
"clipboard": []string{xsel, "--input", "--clipboard"},
}
xclipPasteArgs = map[string][]string{
"primary": []string{xclip, "-out"},
"clipboard": []string{xclip, "-out", "-selection", "clipboard"},
}
xclipCopyArgs = map[string][]string{
"primary": []string{xclip, "-in"},
"clipboard": []string{xclip, "-in", "-selection", "clipboard"},
}
wlpasteArgs = map[string][]string{
"primary": []string{wlpaste, "--no-newline", "--primary"},
"clipboard": []string{wlpaste, "--no-newline"},
}
wlcopyArgs = map[string][]string{
"primary": []string{wlcopy, "--primary"},
"clipboard": []string{wlcopy},
}
termuxPasteArgs = map[string][]string{
"primary": []string{termuxClipboardGet},
"clipboard": []string{termuxClipboardGet},
}
termuxCopyArgs = map[string][]string{
"primary": []string{termuxClipboardSet},
"clipboard": []string{termuxClipboardSet},
}
missingCommands = errors.New("No clipboard utilities available. Please install xsel, xclip, wl-clipboard or Termux:API add-on for termux-clipboard-get/set.")
internalClipboards map[string]string
)
// verify install makes sure that the given exec is installed
// and operating correctly. In some cases, xclip/xsel can be installed
// but not working because an X server is not running.
func verifyInstall(cmd string) bool {
if _, err := exec.LookPath(cmd); err == nil {
// first check if to read from the clipboard
// if this is possible, then xclip/xsel is working properly
pasteCmd := getPasteCommand("primary")
_, err := pasteCmd.Output()
if err == nil {
return true
}
// If the previous command didn't work, this could be because the clipboard
// has no contents. Now we will try to copy an empty string into the clipboard.
copyCmd := getCopyCommand("primary")
in, err := copyCmd.StdinPipe()
if err != nil {
return false
}
if err := copyCmd.Start(); err != nil {
return false
}
if _, err := in.Write([]byte{}); err != nil {
return false
}
if err := in.Close(); err != nil {
return false
}
return copyCmd.Wait() == nil
}
// if exec was not found in path we know it is not installed
return false
}
func initialize() error {
if os.Getenv("WAYLAND_DISPLAY") != "" {
pasteCmdArgs = wlpasteArgs
copyCmdArgs = wlcopyArgs
if _, err := exec.LookPath(wlcopy); err == nil {
if _, err := exec.LookPath(wlpaste); err == nil {
return nil
}
}
}
pasteCmdArgs = xclipPasteArgs
copyCmdArgs = xclipCopyArgs
if verifyInstall(xclip) {
return nil
}
pasteCmdArgs = xselPasteArgs
copyCmdArgs = xselCopyArgs
if verifyInstall(xsel) {
return nil
}
pasteCmdArgs = termuxPasteArgs
copyCmdArgs = termuxCopyArgs
if _, err := exec.LookPath(termuxClipboardSet); err == nil {
if _, err := exec.LookPath(termuxClipboardGet); err == nil {
return nil
}
}
if internalClipboards == nil {
internalClipboards = make(map[string]string)
}
Unsupported = true
return errors.New("System clipboard not found, install xclip/xsel")
}
func getPasteCommand(register string) *exec.Cmd {
return exec.Command(pasteCmdArgs[register][0], pasteCmdArgs[register][1:]...)
}
func getCopyCommand(register string) *exec.Cmd {
return exec.Command(copyCmdArgs[register][0], copyCmdArgs[register][1:]...)
}
func readAll(register string) (string, error) {
if Unsupported {
if text, ok := internalClipboards[register]; ok {
return text, nil
}
return "", nil
}
pasteCmd := getPasteCommand(register)
out, err := pasteCmd.Output()
if err != nil {
return "", err
}
return string(out), nil
}
func writeAll(text, register string) error {
if Unsupported {
internalClipboards[register] = text
return nil
}
copyCmd := getCopyCommand(register)
in, err := copyCmd.StdinPipe()
if err != nil {
return err
}
if err := copyCmd.Start(); err != nil {
return err
}
if _, err := in.Write([]byte(text)); err != nil {
return err
}
if err := in.Close(); err != nil {
return err
}
return copyCmd.Wait()
}
|
