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|
// SPDX-License-Identifier: Unlicense OR MIT
// +build windows
package windows
import (
"fmt"
"runtime"
"time"
"unsafe"
syscall "golang.org/x/sys/windows"
)
type Rect struct {
Left, Top, Right, Bottom int32
}
type WndClassEx struct {
CbSize uint32
Style uint32
LpfnWndProc uintptr
CnClsExtra int32
CbWndExtra int32
HInstance syscall.Handle
HIcon syscall.Handle
HCursor syscall.Handle
HbrBackground syscall.Handle
LpszMenuName *uint16
LpszClassName *uint16
HIconSm syscall.Handle
}
type Msg struct {
Hwnd syscall.Handle
Message uint32
WParam uintptr
LParam uintptr
Time uint32
Pt Point
LPrivate uint32
}
type Point struct {
X, Y int32
}
type MinMaxInfo struct {
PtReserved Point
PtMaxSize Point
PtMaxPosition Point
PtMinTrackSize Point
PtMaxTrackSize Point
}
const (
CS_HREDRAW = 0x0002
CS_VREDRAW = 0x0001
CS_OWNDC = 0x0020
CW_USEDEFAULT = -2147483648
IDC_ARROW = 32512
INFINITE = 0xFFFFFFFF
LOGPIXELSX = 88
MDT_EFFECTIVE_DPI = 0
MONITOR_DEFAULTTOPRIMARY = 1
SIZE_MAXIMIZED = 2
SIZE_MINIMIZED = 1
SIZE_RESTORED = 0
SW_SHOWDEFAULT = 10
USER_TIMER_MINIMUM = 0x0000000A
VK_CONTROL = 0x11
VK_LWIN = 0x5B
VK_MENU = 0x12
VK_RWIN = 0x5C
VK_SHIFT = 0x10
VK_BACK = 0x08
VK_DELETE = 0x2e
VK_DOWN = 0x28
VK_END = 0x23
VK_ESCAPE = 0x1b
VK_HOME = 0x24
VK_LEFT = 0x25
VK_NEXT = 0x22
VK_PRIOR = 0x21
VK_RIGHT = 0x27
VK_RETURN = 0x0d
VK_SPACE = 0x20
VK_TAB = 0x09
VK_UP = 0x26
VK_F1 = 0x70
VK_F2 = 0x71
VK_F3 = 0x72
VK_F4 = 0x73
VK_F5 = 0x74
VK_F6 = 0x75
VK_F7 = 0x76
VK_F8 = 0x77
VK_F9 = 0x78
VK_F10 = 0x79
VK_F11 = 0x7A
VK_F12 = 0x7B
VK_OEM_1 = 0xba
VK_OEM_PLUS = 0xbb
VK_OEM_COMMA = 0xbc
VK_OEM_MINUS = 0xbd
VK_OEM_PERIOD = 0xbe
VK_OEM_2 = 0xbf
VK_OEM_3 = 0xc0
VK_OEM_4 = 0xdb
VK_OEM_5 = 0xdc
VK_OEM_6 = 0xdd
VK_OEM_7 = 0xde
VK_OEM_102 = 0xe2
UNICODE_NOCHAR = 65535
WM_CANCELMODE = 0x001F
WM_CHAR = 0x0102
WM_CREATE = 0x0001
WM_DPICHANGED = 0x02E0
WM_DESTROY = 0x0002
WM_ERASEBKGND = 0x0014
WM_KEYDOWN = 0x0100
WM_KEYUP = 0x0101
WM_LBUTTONDOWN = 0x0201
WM_LBUTTONUP = 0x0202
WM_MBUTTONDOWN = 0x0207
WM_MBUTTONUP = 0x0208
WM_MOUSEMOVE = 0x0200
WM_MOUSEWHEEL = 0x020A
WM_PAINT = 0x000F
WM_CLOSE = 0x0010
WM_QUIT = 0x0012
WM_SETFOCUS = 0x0007
WM_KILLFOCUS = 0x0008
WM_SHOWWINDOW = 0x0018
WM_SIZE = 0x0005
WM_SYSKEYDOWN = 0x0104
WM_RBUTTONDOWN = 0x0204
WM_RBUTTONUP = 0x0205
WM_TIMER = 0x0113
WM_UNICHAR = 0x0109
WM_USER = 0x0400
WM_GETMINMAXINFO = 0x0024
WS_CLIPCHILDREN = 0x00010000
WS_CLIPSIBLINGS = 0x04000000
WS_VISIBLE = 0x10000000
WS_OVERLAPPED = 0x00000000
WS_OVERLAPPEDWINDOW = WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME |
WS_MINIMIZEBOX | WS_MAXIMIZEBOX
WS_CAPTION = 0x00C00000
WS_SYSMENU = 0x00080000
WS_THICKFRAME = 0x00040000
WS_MINIMIZEBOX = 0x00020000
WS_MAXIMIZEBOX = 0x00010000
WS_EX_APPWINDOW = 0x00040000
WS_EX_WINDOWEDGE = 0x00000100
QS_ALLINPUT = 0x04FF
MWMO_WAITALL = 0x0001
MWMO_INPUTAVAILABLE = 0x0004
WAIT_OBJECT_0 = 0
PM_REMOVE = 0x0001
PM_NOREMOVE = 0x0000
GHND = 0x0042
CF_UNICODETEXT = 13
)
var (
kernel32 = syscall.NewLazySystemDLL("kernel32.dll")
_GetModuleHandleW = kernel32.NewProc("GetModuleHandleW")
_GlobalAlloc = kernel32.NewProc("GlobalAlloc")
_GlobalFree = kernel32.NewProc("GlobalFree")
_GlobalLock = kernel32.NewProc("GlobalLock")
_GlobalUnlock = kernel32.NewProc("GlobalUnlock")
user32 = syscall.NewLazySystemDLL("user32.dll")
_AdjustWindowRectEx = user32.NewProc("AdjustWindowRectEx")
_CallMsgFilter = user32.NewProc("CallMsgFilterW")
_CloseClipboard = user32.NewProc("CloseClipboard")
_CreateWindowEx = user32.NewProc("CreateWindowExW")
_DefWindowProc = user32.NewProc("DefWindowProcW")
_DestroyWindow = user32.NewProc("DestroyWindow")
_DispatchMessage = user32.NewProc("DispatchMessageW")
_EmptyClipboard = user32.NewProc("EmptyClipboard")
_GetClientRect = user32.NewProc("GetClientRect")
_GetClipboardData = user32.NewProc("GetClipboardData")
_GetDC = user32.NewProc("GetDC")
_GetKeyState = user32.NewProc("GetKeyState")
_GetMessage = user32.NewProc("GetMessageW")
_GetMessageTime = user32.NewProc("GetMessageTime")
_KillTimer = user32.NewProc("KillTimer")
_LoadCursor = user32.NewProc("LoadCursorW")
_MonitorFromPoint = user32.NewProc("MonitorFromPoint")
_MsgWaitForMultipleObjectsEx = user32.NewProc("MsgWaitForMultipleObjectsEx")
_OpenClipboard = user32.NewProc("OpenClipboard")
_PeekMessage = user32.NewProc("PeekMessageW")
_PostMessage = user32.NewProc("PostMessageW")
_PostQuitMessage = user32.NewProc("PostQuitMessage")
_ReleaseCapture = user32.NewProc("ReleaseCapture")
_RegisterClassExW = user32.NewProc("RegisterClassExW")
_ReleaseDC = user32.NewProc("ReleaseDC")
_ScreenToClient = user32.NewProc("ScreenToClient")
_ShowWindow = user32.NewProc("ShowWindow")
_SetCapture = user32.NewProc("SetCapture")
_SetClipboardData = user32.NewProc("SetClipboardData")
_SetForegroundWindow = user32.NewProc("SetForegroundWindow")
_SetFocus = user32.NewProc("SetFocus")
_SetProcessDPIAware = user32.NewProc("SetProcessDPIAware")
_SetTimer = user32.NewProc("SetTimer")
_TranslateMessage = user32.NewProc("TranslateMessage")
_UnregisterClass = user32.NewProc("UnregisterClassW")
_UpdateWindow = user32.NewProc("UpdateWindow")
shcore = syscall.NewLazySystemDLL("shcore")
_GetDpiForMonitor = shcore.NewProc("GetDpiForMonitor")
gdi32 = syscall.NewLazySystemDLL("gdi32")
_GetDeviceCaps = gdi32.NewProc("GetDeviceCaps")
)
func AdjustWindowRectEx(r *Rect, dwStyle uint32, bMenu int, dwExStyle uint32) {
_AdjustWindowRectEx.Call(uintptr(unsafe.Pointer(r)), uintptr(dwStyle), uintptr(bMenu), uintptr(dwExStyle))
issue34474KeepAlive(r)
}
func CallMsgFilter(m *Msg, nCode uintptr) bool {
r, _, _ := _CallMsgFilter.Call(uintptr(unsafe.Pointer(m)), nCode)
issue34474KeepAlive(m)
return r != 0
}
func CloseClipboard() error {
r, _, err := _CloseClipboard.Call()
if r == 0 {
return fmt.Errorf("CloseClipboard: %v", err)
}
return nil
}
func CreateWindowEx(dwExStyle uint32, lpClassName uint16, lpWindowName string, dwStyle uint32, x, y, w, h int32, hWndParent, hMenu, hInstance syscall.Handle, lpParam uintptr) (syscall.Handle, error) {
wname := syscall.StringToUTF16Ptr(lpWindowName)
hwnd, _, err := _CreateWindowEx.Call(
uintptr(dwExStyle),
uintptr(lpClassName),
uintptr(unsafe.Pointer(wname)),
uintptr(dwStyle),
uintptr(x), uintptr(y),
uintptr(w), uintptr(h),
uintptr(hWndParent),
uintptr(hMenu),
uintptr(hInstance),
uintptr(lpParam))
issue34474KeepAlive(wname)
if hwnd == 0 {
return 0, fmt.Errorf("CreateWindowEx failed: %v", err)
}
return syscall.Handle(hwnd), nil
}
func DefWindowProc(hwnd syscall.Handle, msg uint32, wparam, lparam uintptr) uintptr {
r, _, _ := _DefWindowProc.Call(uintptr(hwnd), uintptr(msg), wparam, lparam)
return r
}
func DestroyWindow(hwnd syscall.Handle) {
_DestroyWindow.Call(uintptr(hwnd))
}
func DispatchMessage(m *Msg) {
_DispatchMessage.Call(uintptr(unsafe.Pointer(m)))
issue34474KeepAlive(m)
}
func EmptyClipboard() error {
r, _, err := _EmptyClipboard.Call()
if r == 0 {
return fmt.Errorf("EmptyClipboard: %v", err)
}
return nil
}
func GetClientRect(hwnd syscall.Handle, r *Rect) {
_GetClientRect.Call(uintptr(hwnd), uintptr(unsafe.Pointer(r)))
issue34474KeepAlive(r)
}
func GetClipboardData(format uint32) (syscall.Handle, error) {
r, _, err := _GetClipboardData.Call(uintptr(format))
if r == 0 {
return 0, fmt.Errorf("GetClipboardData: %v", err)
}
return syscall.Handle(r), nil
}
func GetDC(hwnd syscall.Handle) (syscall.Handle, error) {
hdc, _, err := _GetDC.Call(uintptr(hwnd))
if hdc == 0 {
return 0, fmt.Errorf("GetDC failed: %v", err)
}
return syscall.Handle(hdc), nil
}
func GetModuleHandle() (syscall.Handle, error) {
h, _, err := _GetModuleHandleW.Call(uintptr(0))
if h == 0 {
return 0, fmt.Errorf("GetModuleHandleW failed: %v", err)
}
return syscall.Handle(h), nil
}
func getDeviceCaps(hdc syscall.Handle, index int32) int {
c, _, _ := _GetDeviceCaps.Call(uintptr(hdc), uintptr(index))
return int(c)
}
func getDpiForMonitor(hmonitor syscall.Handle, dpiType uint32) int {
var dpiX, dpiY uintptr
_GetDpiForMonitor.Call(uintptr(hmonitor), uintptr(dpiType), uintptr(unsafe.Pointer(&dpiX)), uintptr(unsafe.Pointer(&dpiY)))
return int(dpiX)
}
// GetSystemDPI returns the effective DPI of the system.
func GetSystemDPI() int {
// Check for getDpiForMonitor, introduced in Windows 8.1.
if _GetDpiForMonitor.Find() == nil {
hmon := monitorFromPoint(Point{}, MONITOR_DEFAULTTOPRIMARY)
return getDpiForMonitor(hmon, MDT_EFFECTIVE_DPI)
} else {
// Fall back to the physical device DPI.
screenDC, err := GetDC(0)
if err != nil {
return 96
}
defer ReleaseDC(screenDC)
return getDeviceCaps(screenDC, LOGPIXELSX)
}
}
func GetKeyState(nVirtKey int32) int16 {
c, _, _ := _GetKeyState.Call(uintptr(nVirtKey))
return int16(c)
}
func GetMessage(m *Msg, hwnd syscall.Handle, wMsgFilterMin, wMsgFilterMax uint32) int32 {
r, _, _ := _GetMessage.Call(uintptr(unsafe.Pointer(m)),
uintptr(hwnd),
uintptr(wMsgFilterMin),
uintptr(wMsgFilterMax))
issue34474KeepAlive(m)
return int32(r)
}
func GetMessageTime() time.Duration {
r, _, _ := _GetMessageTime.Call()
return time.Duration(r) * time.Millisecond
}
func GlobalAlloc(size int) (syscall.Handle, error) {
r, _, err := _GlobalAlloc.Call(GHND, uintptr(size))
if r == 0 {
return 0, fmt.Errorf("GlobalAlloc: %v", err)
}
return syscall.Handle(r), nil
}
func GlobalFree(h syscall.Handle) {
_GlobalFree.Call(uintptr(h))
}
func GlobalLock(h syscall.Handle) (uintptr, error) {
r, _, err := _GlobalLock.Call(uintptr(h))
if r == 0 {
return 0, fmt.Errorf("GlobalLock: %v", err)
}
return r, nil
}
func GlobalUnlock(h syscall.Handle) {
_GlobalUnlock.Call(uintptr(h))
}
func KillTimer(hwnd syscall.Handle, nIDEvent uintptr) error {
r, _, err := _SetTimer.Call(uintptr(hwnd), uintptr(nIDEvent), 0, 0)
if r == 0 {
return fmt.Errorf("KillTimer failed: %v", err)
}
return nil
}
func LoadCursor(curID uint16) (syscall.Handle, error) {
h, _, err := _LoadCursor.Call(0, uintptr(curID))
if h == 0 {
return 0, fmt.Errorf("LoadCursorW failed: %v", err)
}
return syscall.Handle(h), nil
}
func monitorFromPoint(pt Point, flags uint32) syscall.Handle {
r, _, _ := _MonitorFromPoint.Call(uintptr(pt.X), uintptr(pt.Y), uintptr(flags))
return syscall.Handle(r)
}
func MsgWaitForMultipleObjectsEx(nCount uint32, pHandles uintptr, millis, mask, flags uint32) (uint32, error) {
r, _, err := _MsgWaitForMultipleObjectsEx.Call(uintptr(nCount), pHandles, uintptr(millis), uintptr(mask), uintptr(flags))
res := uint32(r)
if res == 0xFFFFFFFF {
return 0, fmt.Errorf("MsgWaitForMultipleObjectsEx failed: %v", err)
}
return res, nil
}
func OpenClipboard(hwnd syscall.Handle) error {
r, _, err := _OpenClipboard.Call(uintptr(hwnd))
if r == 0 {
return fmt.Errorf("OpenClipboard: %v", err)
}
return nil
}
func PeekMessage(m *Msg, hwnd syscall.Handle, wMsgFilterMin, wMsgFilterMax, wRemoveMsg uint32) bool {
r, _, _ := _PeekMessage.Call(uintptr(unsafe.Pointer(m)), uintptr(hwnd), uintptr(wMsgFilterMin), uintptr(wMsgFilterMax), uintptr(wRemoveMsg))
issue34474KeepAlive(m)
return r != 0
}
func PostQuitMessage(exitCode uintptr) {
_PostQuitMessage.Call(exitCode)
}
func PostMessage(hwnd syscall.Handle, msg uint32, wParam, lParam uintptr) error {
r, _, err := _PostMessage.Call(uintptr(hwnd), uintptr(msg), wParam, lParam)
if r == 0 {
return fmt.Errorf("PostMessage failed: %v", err)
}
return nil
}
func ReleaseCapture() bool {
r, _, _ := _ReleaseCapture.Call()
return r != 0
}
func RegisterClassEx(cls *WndClassEx) (uint16, error) {
a, _, err := _RegisterClassExW.Call(uintptr(unsafe.Pointer(cls)))
issue34474KeepAlive(cls)
if a == 0 {
return 0, fmt.Errorf("RegisterClassExW failed: %v", err)
}
return uint16(a), nil
}
func ReleaseDC(hdc syscall.Handle) {
_ReleaseDC.Call(uintptr(hdc))
}
func SetForegroundWindow(hwnd syscall.Handle) {
_SetForegroundWindow.Call(uintptr(hwnd))
}
func SetFocus(hwnd syscall.Handle) {
_SetFocus.Call(uintptr(hwnd))
}
func SetProcessDPIAware() {
_SetProcessDPIAware.Call()
}
func SetCapture(hwnd syscall.Handle) syscall.Handle {
r, _, _ := _SetCapture.Call(uintptr(hwnd))
return syscall.Handle(r)
}
func SetClipboardData(format uint32, mem syscall.Handle) error {
r, _, err := _SetClipboardData.Call(uintptr(format), uintptr(mem))
if r == 0 {
return fmt.Errorf("SetClipboardData: %v", err)
}
return nil
}
func SetTimer(hwnd syscall.Handle, nIDEvent uintptr, uElapse uint32, timerProc uintptr) error {
r, _, err := _SetTimer.Call(uintptr(hwnd), uintptr(nIDEvent), uintptr(uElapse), timerProc)
if r == 0 {
return fmt.Errorf("SetTimer failed: %v", err)
}
return nil
}
func ScreenToClient(hwnd syscall.Handle, p *Point) {
_ScreenToClient.Call(uintptr(hwnd), uintptr(unsafe.Pointer(p)))
issue34474KeepAlive(p)
}
func ShowWindow(hwnd syscall.Handle, nCmdShow int32) {
_ShowWindow.Call(uintptr(hwnd), uintptr(nCmdShow))
}
func TranslateMessage(m *Msg) {
_TranslateMessage.Call(uintptr(unsafe.Pointer(m)))
issue34474KeepAlive(m)
}
func UnregisterClass(cls uint16, hInst syscall.Handle) {
_UnregisterClass.Call(uintptr(cls), uintptr(hInst))
}
func UpdateWindow(hwnd syscall.Handle) {
_UpdateWindow.Call(uintptr(hwnd))
}
// issue34474KeepAlive calls runtime.KeepAlive as a
// workaround for golang.org/issue/34474.
func issue34474KeepAlive(v interface{}) {
runtime.KeepAlive(v)
}
|