LLMIFY THIS MOFO

internal/injection/clipboard_paste.go

@@ -0,0 +1,76 @@
+package injection
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+)
+
+// clipboardPasteBackend copies text to the primary selection and pastes it
+// with ydotool's layout-independent Shift+Insert key codes.
+//
+// This preserves the regular clipboard, is independent of the active keyboard
+// layout, and delivers the whole string at once.
+type clipboardPasteBackend struct {
+	clipboard *clipboardBackend
+	ydotool   *ydotoolBackend
+}
+
+func NewClipboardPasteBackend() Backend {
+	return &clipboardPasteBackend{
+		clipboard: NewClipboardBackend().(*clipboardBackend),
+		ydotool:   NewYdotoolBackend().(*ydotoolBackend),
+	}
+}
+
+func (c *clipboardPasteBackend) Name() string {
+	return "clipboard-paste"
+}
+
+func (c *clipboardPasteBackend) Available() error {
+	if err := c.clipboard.Available(); err != nil {
+		return err
+	}
+	if err := c.ydotool.Available(); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (c *clipboardPasteBackend) Inject(ctx context.Context, text string, timeout time.Duration) error {
+	ctx, cancel := context.WithTimeout(ctx, timeout)
+	defer cancel()
+
+	if err := c.Available(); err != nil {
+		return err
+	}
+	// Shift+Insert pastes the primary selection, leaving the user's regular
+	// clipboard untouched.
+	primaryCopy := exec.CommandContext(ctx, "wl-copy", "--primary")
+	primaryCopy.Stdin = strings.NewReader(text)
+	if err := primaryCopy.Run(); err != nil {
+		return fmt.Errorf("copy transcription to primary selection: %w", err)
+	}
+	// wl-copy returns before every client has observed the new selection. Give
+	// the compositor a short chance to publish it; this is still perceived as
+	// an immediate paste and avoids inserting the previous clipboard contents.
+	select {
+	case <-time.After(150 * time.Millisecond):
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+
+	// Linux input event codes: KEY_LEFTSHIFT=42, KEY_INSERT=110. These keys do
+	// not depend on the alphabetic layout, and Shift+Insert is widely supported.
+	cmd := exec.CommandContext(ctx, "ydotool", "key", "42:1", "110:1", "110:0", "42:0")
+	if socketPath := c.ydotool.getSocketPath(); socketPath != "" {
+		cmd.Env = append(os.Environ(), "YDOTOOL_SOCKET="+socketPath)
+	}
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("paste primary selection with ydotool: %w", err)
+	}
+	return nil
+}