paste.go RawHistoryFolder

1package ui
2
3import (
4	"context"
5	"github.com/bnema/nefergui/internal/edit"
6)
7
8// startPaste is invoked during Build. A worker may only queue its completion;
9// it must not touch the editor or any other frame-owned state.
10func (r *runtime) startPaste(clipboard edit.AsyncClipboard, target *identity) error {
11	if r.pasteCancel != nil {
12		r.pasteCancel()
13	}
14	parent := r.pasteCtx
15	if parent == nil {
16		parent = context.Background()
17	}
18	ctx, cancel := context.WithCancel(parent)
19	r.pasteCancel = cancel
20	r.pasteID++
21	id := r.pasteID
22	err := clipboard.ReadTextAsync(ctx, edit.MaxClipboardBytes, func(data []byte, err error) {
23		r.mu.Lock()
24		current := r.pasteID == id && ctx.Err() == nil
25		r.mu.Unlock()
26		if current {
27			r.Queue(inputEvent{Target: target, Kind: "paste-result", Text: string(data), Err: err})
28		}
29	})
30	if err != nil {
31		cancel()
32	}
33	return err
34}