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107
vendor/github.com/zyedidia/clipboard/clipboard_windows.go
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vendored
Normal file
107
vendor/github.com/zyedidia/clipboard/clipboard_windows.go
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// Copyright 2013 @atotto. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build windows
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package clipboard
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import (
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"syscall"
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"unsafe"
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)
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const (
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cfUnicodetext = 13
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gmemFixed = 0x0000
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)
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var (
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user32 = syscall.MustLoadDLL("user32")
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openClipboard = user32.MustFindProc("OpenClipboard")
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closeClipboard = user32.MustFindProc("CloseClipboard")
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emptyClipboard = user32.MustFindProc("EmptyClipboard")
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getClipboardData = user32.MustFindProc("GetClipboardData")
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setClipboardData = user32.MustFindProc("SetClipboardData")
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kernel32 = syscall.NewLazyDLL("kernel32")
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globalAlloc = kernel32.NewProc("GlobalAlloc")
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globalFree = kernel32.NewProc("GlobalFree")
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globalLock = kernel32.NewProc("GlobalLock")
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globalUnlock = kernel32.NewProc("GlobalUnlock")
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lstrcpy = kernel32.NewProc("lstrcpyW")
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)
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func readAll(register string) (string, error) {
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if register != "clipboard" {
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return "", nil
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}
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r, _, err := openClipboard.Call(0)
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if r == 0 {
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return "", err
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}
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defer closeClipboard.Call()
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h, _, err := getClipboardData.Call(cfUnicodetext)
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if r == 0 {
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return "", err
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}
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l, _, err := globalLock.Call(h)
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if l == 0 {
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return "", err
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}
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text := syscall.UTF16ToString((*[1 << 20]uint16)(unsafe.Pointer(l))[:])
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r, _, err = globalUnlock.Call(h)
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if r == 0 {
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return "", err
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}
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return text, nil
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}
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func writeAll(text string, register string) error {
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if register != "clipboard" {
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return nil
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}
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r, _, err := openClipboard.Call(0)
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if r == 0 {
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return err
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}
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defer closeClipboard.Call()
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r, _, err = emptyClipboard.Call(0)
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if r == 0 {
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return err
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}
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data := syscall.StringToUTF16(text)
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h, _, err := globalAlloc.Call(gmemFixed, uintptr(len(data)*int(unsafe.Sizeof(data[0]))))
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if h == 0 {
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return err
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}
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l, _, err := globalLock.Call(h)
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if l == 0 {
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return err
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}
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r, _, err = lstrcpy.Call(l, uintptr(unsafe.Pointer(&data[0])))
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if r == 0 {
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return err
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}
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r, _, err = globalUnlock.Call(h)
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if r == 0 {
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return err
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}
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r, _, err = setClipboardData.Call(cfUnicodetext, h)
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if r == 0 {
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return err
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}
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return nil
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}
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