47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
// Package clipboard wraps golang.design/x/clipboard with lazy initialization.
|
|
//
|
|
// Why a wrapper:
|
|
// - The upstream library requires a one-time clipboard.Init() call. Hiding it
|
|
// here keeps the application service free of init concerns.
|
|
// - Allows future swap to a different backend (e.g. atotto/clipboard) without
|
|
// changing callers.
|
|
package clipboard
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
|
|
"golang.design/x/clipboard"
|
|
)
|
|
|
|
// Writer abstracts clipboard writes for testability.
|
|
type Writer interface {
|
|
WriteText(s string) error
|
|
}
|
|
|
|
type clipWriter struct {
|
|
once sync.Once
|
|
initErr error
|
|
}
|
|
|
|
// New returns a process-wide clipboard writer. Initialization is lazy.
|
|
func New() Writer {
|
|
return &clipWriter{}
|
|
}
|
|
|
|
func (w *clipWriter) ensureInit() error {
|
|
w.once.Do(func() {
|
|
w.initErr = clipboard.Init()
|
|
})
|
|
return w.initErr
|
|
}
|
|
|
|
// WriteText replaces the clipboard contents with the supplied UTF-8 string.
|
|
func (w *clipWriter) WriteText(s string) error {
|
|
if err := w.ensureInit(); err != nil {
|
|
return fmt.Errorf("clipboard init: %w", err)
|
|
}
|
|
clipboard.Write(clipboard.FmtText, []byte(s))
|
|
return nil
|
|
}
|