init commit

internal/clipboard/wayland.go

@@ -0,0 +1,77 @@
+package clipboard
+
+import (
+	"bufio"
+	"context"
+	"os/exec"
+	"strings"
+)
+
+type WaylandClipboard struct{}
+
+func NewWayland() (*WaylandClipboard, error) {
+	// Check if wl-paste is available
+	if _, err := exec.LookPath("wl-paste"); err != nil {
+		return nil, err
+	}
+	if _, err := exec.LookPath("wl-copy"); err != nil {
+		return nil, err
+	}
+	return &WaylandClipboard{}, nil
+}
+
+func (c *WaylandClipboard) Read() (string, error) {
+	cmd := exec.Command("wl-paste", "--no-newline")
+	output, err := cmd.Output()
+	if err != nil {
+		// wl-paste returns error if clipboard is empty
+		return "", nil
+	}
+	return string(output), nil
+}
+
+func (c *WaylandClipboard) Write(content string) error {
+	cmd := exec.Command("wl-copy")
+	cmd.Stdin = strings.NewReader(content)
+	return cmd.Run()
+}
+
+func (c *WaylandClipboard) Watch(ctx context.Context) <-chan string {
+	out := make(chan string)
+
+	go func() {
+		defer close(out)
+
+		// Use wl-paste --watch to detect clipboard changes
+		// When clipboard changes, it runs "echo x" which outputs a single line
+		// Then we read the full clipboard content separately
+		cmd := exec.CommandContext(ctx, "wl-paste", "--watch", "echo", "x")
+		stdout, err := cmd.StdoutPipe()
+		if err != nil {
+			return
+		}
+
+		if err := cmd.Start(); err != nil {
+			return
+		}
+
+		scanner := bufio.NewScanner(stdout)
+		for scanner.Scan() {
+			select {
+			case <-ctx.Done():
+				cmd.Process.Kill()
+				return
+			default:
+				// Clipboard changed, read full content
+				content, err := c.Read()
+				if err == nil && content != "" {
+					out <- content
+				}
+			}
+		}
+
+		cmd.Wait()
+	}()
+
+	return out
+}