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// Copyright 2013 @atotto. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build windows
package clipboard
import (
"syscall"
"unsafe"
)
const (
cfUnicodetext = 13
gmemFixed = 0x0000
)
var (
user32 = syscall.MustLoadDLL("user32")
openClipboard = user32.MustFindProc("OpenClipboard")
closeClipboard = user32.MustFindProc("CloseClipboard")
emptyClipboard = user32.MustFindProc("EmptyClipboard")
getClipboardData = user32.MustFindProc("GetClipboardData")
setClipboardData = user32.MustFindProc("SetClipboardData")
kernel32 = syscall.NewLazyDLL("kernel32")
globalAlloc = kernel32.NewProc("GlobalAlloc")
globalFree = kernel32.NewProc("GlobalFree")
globalLock = kernel32.NewProc("GlobalLock")
globalUnlock = kernel32.NewProc("GlobalUnlock")
lstrcpy = kernel32.NewProc("lstrcpyW")
)
func readAll(register string) (string, error) {
if register != "clipboard" {
return "", nil
}
r, _, err := openClipboard.Call(0)
if r == 0 {
return "", err
}
defer closeClipboard.Call()
h, _, err := getClipboardData.Call(cfUnicodetext)
if r == 0 {
return "", err
}
l, _, err := globalLock.Call(h)
if l == 0 {
return "", err
}
text := syscall.UTF16ToString((*[1 << 20]uint16)(unsafe.Pointer(l))[:])
r, _, err = globalUnlock.Call(h)
if r == 0 {
return "", err
}
return text, nil
}
func writeAll(text string, register string) error {
if register != "clipboard" {
return nil
}
r, _, err := openClipboard.Call(0)
if r == 0 {
return err
}
defer closeClipboard.Call()
r, _, err = emptyClipboard.Call(0)
if r == 0 {
return err
}
data := syscall.StringToUTF16(text)
h, _, err := globalAlloc.Call(gmemFixed, uintptr(len(data)*int(unsafe.Sizeof(data[0]))))
if h == 0 {
return err
}
l, _, err := globalLock.Call(h)
if l == 0 {
return err
}
r, _, err = lstrcpy.Call(l, uintptr(unsafe.Pointer(&data[0])))
if r == 0 {
return err
}
r, _, err = globalUnlock.Call(h)
if r == 0 {
return err
}
r, _, err = setClipboardData.Call(cfUnicodetext, h)
if r == 0 {
return err
}
return nil
}
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