80 lines
1.5 KiB
Go
80 lines
1.5 KiB
Go
// Copyright 2021 The golang.design Initiative Authors.
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// All rights reserved. Use of this source code is governed
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// by a MIT license that can be found in the LICENSE file.
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//
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// Written by Changkun Ou <changkun.de>
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//go:build ios
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package clipboard
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/*
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#cgo CFLAGS: -x objective-c
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#cgo LDFLAGS: -framework Foundation -framework UIKit -framework MobileCoreServices
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#import <stdlib.h>
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void clipboard_write_string(char *s);
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char *clipboard_read_string();
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*/
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import "C"
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import (
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"bytes"
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"context"
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"time"
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"unsafe"
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)
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func initialize() error { return nil }
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func read(t Format) (buf []byte, err error) {
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switch t {
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case FmtText:
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return []byte(C.GoString(C.clipboard_read_string())), nil
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case FmtImage:
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return nil, errUnsupported
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default:
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return nil, errUnsupported
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}
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}
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// SetContent sets the clipboard content for iOS
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func write(t Format, buf []byte) (<-chan struct{}, error) {
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done := make(chan struct{}, 1)
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switch t {
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case FmtText:
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cs := C.CString(string(buf))
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defer C.free(unsafe.Pointer(cs))
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C.clipboard_write_string(cs)
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return done, nil
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case FmtImage:
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return nil, errUnsupported
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default:
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return nil, errUnsupported
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}
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}
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func watch(ctx context.Context, t Format) <-chan []byte {
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recv := make(chan []byte, 1)
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ti := time.NewTicker(time.Second)
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last := Read(t)
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go func() {
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for {
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select {
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case <-ctx.Done():
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close(recv)
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return
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case <-ti.C:
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b := Read(t)
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if b == nil {
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continue
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}
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if bytes.Compare(last, b) != 0 {
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recv <- b
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last = b
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}
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}
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}
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}()
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return recv
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}
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