154 lines
4.2 KiB
Go
154 lines
4.2 KiB
Go
// Copyright 2010-2012 The W32 Authors. 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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package w32
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import (
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"errors"
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"fmt"
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"syscall"
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"unsafe"
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)
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var (
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modshell32 = syscall.NewLazyDLL("shell32.dll")
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procSHBrowseForFolder = modshell32.NewProc("SHBrowseForFolderW")
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procSHGetPathFromIDList = modshell32.NewProc("SHGetPathFromIDListW")
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procDragAcceptFiles = modshell32.NewProc("DragAcceptFiles")
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procDragQueryFile = modshell32.NewProc("DragQueryFileW")
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procDragQueryPoint = modshell32.NewProc("DragQueryPoint")
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procDragFinish = modshell32.NewProc("DragFinish")
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procShellExecute = modshell32.NewProc("ShellExecuteW")
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procExtractIcon = modshell32.NewProc("ExtractIconW")
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)
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func SHBrowseForFolder(bi *BROWSEINFO) uintptr {
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ret, _, _ := procSHBrowseForFolder.Call(uintptr(unsafe.Pointer(bi)))
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return ret
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}
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func SHGetPathFromIDList(idl uintptr) string {
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buf := make([]uint16, 1024)
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procSHGetPathFromIDList.Call(
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idl,
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uintptr(unsafe.Pointer(&buf[0])))
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return syscall.UTF16ToString(buf)
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}
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func DragAcceptFiles(hwnd HWND, accept bool) {
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procDragAcceptFiles.Call(
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uintptr(hwnd),
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uintptr(BoolToBOOL(accept)))
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}
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func DragQueryFile(hDrop HDROP, iFile uint) (fileName string, fileCount uint) {
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ret, _, _ := procDragQueryFile.Call(
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uintptr(hDrop),
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uintptr(iFile),
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0,
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0)
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fileCount = uint(ret)
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if iFile != 0xFFFFFFFF {
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buf := make([]uint16, fileCount+1)
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ret, _, _ := procDragQueryFile.Call(
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uintptr(hDrop),
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uintptr(iFile),
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uintptr(unsafe.Pointer(&buf[0])),
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uintptr(fileCount+1))
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if ret == 0 {
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panic("Invoke DragQueryFile error.")
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}
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fileName = syscall.UTF16ToString(buf)
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}
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return
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}
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func DragQueryPoint(hDrop HDROP) (x, y int, isClientArea bool) {
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var pt POINT
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ret, _, _ := procDragQueryPoint.Call(
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uintptr(hDrop),
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uintptr(unsafe.Pointer(&pt)))
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return int(pt.X), int(pt.Y), (ret == 1)
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}
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func DragFinish(hDrop HDROP) {
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procDragFinish.Call(uintptr(hDrop))
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}
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func ShellExecute(hwnd HWND, lpOperation, lpFile, lpParameters, lpDirectory string, nShowCmd int) error {
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var op, param, directory uintptr
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if len(lpOperation) != 0 {
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op = uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpOperation)))
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}
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if len(lpParameters) != 0 {
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param = uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpParameters)))
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}
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if len(lpDirectory) != 0 {
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directory = uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpDirectory)))
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}
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ret, _, _ := procShellExecute.Call(
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uintptr(hwnd),
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op,
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uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpFile))),
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param,
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directory,
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uintptr(nShowCmd))
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errorMsg := ""
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if ret != 0 && ret <= 32 {
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switch int(ret) {
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case ERROR_FILE_NOT_FOUND:
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errorMsg = "The specified file was not found."
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case ERROR_PATH_NOT_FOUND:
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errorMsg = "The specified path was not found."
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case ERROR_BAD_FORMAT:
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errorMsg = "The .exe file is invalid (non-Win32 .exe or error in .exe image)."
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case SE_ERR_ACCESSDENIED:
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errorMsg = "The operating system denied access to the specified file."
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case SE_ERR_ASSOCINCOMPLETE:
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errorMsg = "The file name association is incomplete or invalid."
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case SE_ERR_DDEBUSY:
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errorMsg = "The DDE transaction could not be completed because other DDE transactions were being processed."
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case SE_ERR_DDEFAIL:
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errorMsg = "The DDE transaction failed."
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case SE_ERR_DDETIMEOUT:
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errorMsg = "The DDE transaction could not be completed because the request timed out."
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case SE_ERR_DLLNOTFOUND:
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errorMsg = "The specified DLL was not found."
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case SE_ERR_NOASSOC:
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errorMsg = "There is no application associated with the given file name extension. This error will also be returned if you attempt to print a file that is not printable."
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case SE_ERR_OOM:
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errorMsg = "There was not enough memory to complete the operation."
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case SE_ERR_SHARE:
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errorMsg = "A sharing violation occurred."
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default:
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errorMsg = fmt.Sprintf("Unknown error occurred with error code %v", ret)
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}
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} else {
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return nil
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}
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return errors.New(errorMsg)
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}
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func ExtractIcon(lpszExeFileName string, nIconIndex int) HICON {
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ret, _, _ := procExtractIcon.Call(
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0,
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uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpszExeFileName))),
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uintptr(nIconIndex))
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return HICON(ret)
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}
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