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app,app/internal/windows: [Windows] implement IME support

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References: https://todo.sr.ht/~eliasnaur/gio/246
Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2022-02-11 19:05:46 +00:00
parent bace706240
commit 27e0b9cc7d
2 changed files with 142 additions and 39 deletions
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app/os_windows.go
+51 -1
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@@ -13,6 +13,7 @@ import (
"sync"
"time"
"unicode"
"unicode/utf8"
"unsafe"
syscall "golang.org/x/sys/windows"
@@ -349,6 +350,48 @@ func windowProc(hwnd syscall.Handle, msg uint32, wParam, lParam uintptr) uintptr
}
case _WM_WAKEUP:
w.w.Event(wakeupEvent{})
case windows.WM_IME_COMPOSITION:
imc := windows.ImmGetContext(w.hwnd)
if imc == 0 {
return windows.TRUE
}
defer windows.ImmReleaseContext(w.hwnd, imc)
state := w.w.EditorState()
rng := state.compose
if rng.Start == -1 {
rng = state.Selection
}
if rng.Start > rng.End {
rng.Start, rng.End = rng.End, rng.Start
}
var replacement string
switch {
case lParam&windows.GCS_RESULTSTR != 0:
replacement = windows.ImmGetCompositionString(imc, windows.GCS_RESULTSTR)
case lParam&windows.GCS_COMPSTR != 0:
replacement = windows.ImmGetCompositionString(imc, windows.GCS_COMPSTR)
}
end := rng.Start + utf8.RuneCountInString(replacement)
w.w.EditorReplace(rng, replacement)
state = w.w.EditorState()
comp := key.Range{
Start: rng.Start,
End: end,
}
if lParam&windows.GCS_DELTASTART != 0 {
start := windows.ImmGetCompositionValue(imc, windows.GCS_DELTASTART)
comp.Start = state.RunesIndex(state.UTF16Index(comp.Start) + start)
}
w.w.SetComposingRegion(comp)
if lParam&windows.GCS_CURSORPOS != 0 {
rel := windows.ImmGetCompositionValue(imc, windows.GCS_CURSORPOS)
pos := state.RunesIndex(state.UTF16Index(rng.Start) + rel)
w.w.SetEditorSelection(key.Range{Start: pos, End: pos})
}
return windows.TRUE
case windows.WM_IME_ENDCOMPOSITION:
w.w.SetComposingRegion(key.Range{Start: -1, End: -1})
return windows.TRUE
}
return windows.DefWindowProc(hwnd, msg, wParam, lParam)
@@ -451,7 +494,14 @@ loop:
return nil
}
func (w *window) EditorStateChanged(old, new editorState) {}
func (w *window) EditorStateChanged(old, new editorState) {
imc := windows.ImmGetContext(w.hwnd)
if imc == 0 {
return
}
defer windows.ImmReleaseContext(w.hwnd, imc)
windows.ImmNotifyIME(imc, windows.NI_COMPOSITIONSTR, windows.CPS_CANCEL, 0)
}
func (w *window) SetAnimating(anim bool) {
w.animating = anim