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app,widget,io: implement IME positioning

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This change implements reporting of the caret position from Editor, as well
as Windows, macOS, Android support. As a result, the IME composition window
on Windows and macOS is now positioned correctly.

References: https://todo.sr.ht/~eliasnaur/gio/246
Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2022-02-13 16:28:30 +01:00
parent cffa748c6a
commit 31f55232bf
13 changed files with 295 additions and 100 deletions
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app/internal/windows/windows.go
+73 -34
View File
@@ -15,6 +15,19 @@ import (
syscall "golang.org/x/sys/windows"
)
type CompositionForm struct {
dwStyle uint32
ptCurrentPos Point
rcArea Rect
}
type CandidateForm struct {
dwIndex uint32
dwStyle uint32
ptCurrentPos Point
rcArea Rect
}
type Rect struct {
Left, Top, Right, Bottom int32
}
@@ -95,6 +108,9 @@ const (
GCS_RESULTREADSTR = 0x0200
GCS_RESULTSTR = 0x0800
CFS_POINT = 0x0002
CFS_CANDIDATEPOS = 0x0040
HWND_TOPMOST = ^(uint32(1) - 1) // -1
HTCLIENT = 1
@@ -187,40 +203,41 @@ const (
UNICODE_NOCHAR = 65535
WM_CANCELMODE = 0x001F
WM_CHAR = 0x0102
WM_CLOSE = 0x0010
WM_CREATE = 0x0001
WM_DPICHANGED = 0x02E0
WM_DESTROY = 0x0002
WM_ERASEBKGND = 0x0014
WM_GETMINMAXINFO = 0x0024
WM_IME_COMPOSITION = 0x010F
WM_IME_ENDCOMPOSITION = 0x010E
WM_KEYDOWN = 0x0100
WM_KEYUP = 0x0101
WM_KILLFOCUS = 0x0008
WM_LBUTTONDOWN = 0x0201
WM_LBUTTONUP = 0x0202
WM_MBUTTONDOWN = 0x0207
WM_MBUTTONUP = 0x0208
WM_MOUSEMOVE = 0x0200
WM_MOUSEWHEEL = 0x020A
WM_MOUSEHWHEEL = 0x020E
WM_PAINT = 0x000F
WM_QUIT = 0x0012
WM_SETCURSOR = 0x0020
WM_SETFOCUS = 0x0007
WM_SHOWWINDOW = 0x0018
WM_SIZE = 0x0005
WM_SYSKEYDOWN = 0x0104
WM_SYSKEYUP = 0x0105
WM_RBUTTONDOWN = 0x0204
WM_RBUTTONUP = 0x0205
WM_TIMER = 0x0113
WM_UNICHAR = 0x0109
WM_USER = 0x0400
WM_WINDOWPOSCHANGED = 0x0047
WM_CANCELMODE = 0x001F
WM_CHAR = 0x0102
WM_CLOSE = 0x0010
WM_CREATE = 0x0001
WM_DPICHANGED = 0x02E0
WM_DESTROY = 0x0002
WM_ERASEBKGND = 0x0014
WM_GETMINMAXINFO = 0x0024
WM_IME_COMPOSITION = 0x010F
WM_IME_ENDCOMPOSITION = 0x010E
WM_IME_STARTCOMPOSITION = 0x010D
WM_KEYDOWN = 0x0100
WM_KEYUP = 0x0101
WM_KILLFOCUS = 0x0008
WM_LBUTTONDOWN = 0x0201
WM_LBUTTONUP = 0x0202
WM_MBUTTONDOWN = 0x0207
WM_MBUTTONUP = 0x0208
WM_MOUSEMOVE = 0x0200
WM_MOUSEWHEEL = 0x020A
WM_MOUSEHWHEEL = 0x020E
WM_PAINT = 0x000F
WM_QUIT = 0x0012
WM_SETCURSOR = 0x0020
WM_SETFOCUS = 0x0007
WM_SHOWWINDOW = 0x0018
WM_SIZE = 0x0005
WM_SYSKEYDOWN = 0x0104
WM_SYSKEYUP = 0x0105
WM_RBUTTONDOWN = 0x0204
WM_RBUTTONUP = 0x0205
WM_TIMER = 0x0113
WM_UNICHAR = 0x0109
WM_USER = 0x0400
WM_WINDOWPOSCHANGED = 0x0047
WS_CLIPCHILDREN = 0x00010000
WS_CLIPSIBLINGS = 0x04000000
@@ -338,6 +355,8 @@ var (
_ImmGetCompositionString = imm32.NewProc("ImmGetCompositionStringW")
_ImmNotifyIME = imm32.NewProc("ImmNotifyIME")
_ImmReleaseContext = imm32.NewProc("ImmReleaseContext")
_ImmSetCandidateWindow = imm32.NewProc("ImmSetCandidateWindow")
_ImmSetCompositionWindow = imm32.NewProc("ImmSetCompositionWindow")
)
func AdjustWindowRectEx(r *Rect, dwStyle uint32, bMenu int, dwExStyle uint32) {
@@ -536,6 +555,26 @@ func ImmGetCompositionValue(imc syscall.Handle, key int) int {
return int(int32(val))
}
func ImmSetCompositionWindow(imc syscall.Handle, x, y int) {
f := CompositionForm{
dwStyle: CFS_POINT,
ptCurrentPos: Point{
X: int32(x), Y: int32(y),
},
}
_ImmSetCompositionWindow.Call(uintptr(imc), uintptr(unsafe.Pointer(&f)))
}
func ImmSetCandidateWindow(imc syscall.Handle, x, y int) {
f := CandidateForm{
dwStyle: CFS_CANDIDATEPOS,
ptCurrentPos: Point{
X: int32(x), Y: int32(y),
},
}
_ImmSetCandidateWindow.Call(uintptr(imc), uintptr(unsafe.Pointer(&f)))
}
func SetWindowLong(hwnd syscall.Handle, idx uint32, style uintptr) {
if runtime.GOARCH == "386" {
_SetWindowLong32.Call(uintptr(hwnd), uintptr(idx), style)