Fixed spellchecking for Windows.

Added a new Init static method in the Platform::Spellchecker namespace.

spellcheck/platform/linux/spellcheck_linux.cpp

@@ -132,6 +132,9 @@ bool EnchantSpellChecker::isWordInDictionary(const QString &word) {
 
 } // namespace
 
+void Init() {
+}
+
 bool IsAvailable() {
 	return EnchantSpellChecker::instance()->isAvailable();
 }

spellcheck/platform/mac/spellcheck_mac.mm

@@ -49,6 +49,9 @@ inline auto SystemLanguages() {
 
 namespace Platform::Spellchecker {
 
+void Init() {
+}
+
 bool IsAvailable() {
 	return true;
 }

spellcheck/platform/platform_spellcheck.h

@@ -16,6 +16,7 @@ constexpr auto kMaxSuggestions = 5;
 [[nodiscard]] bool CheckSpelling(const QString &wordToCheck);
 [[nodiscard]] bool IsWordInDictionary(const QString &wordToCheck);
 
+void Init();
 void KnownLanguages(std::vector<QString> *langCodes);
 void FillSuggestionList(
 	const QString &wrongWord,

spellcheck/platform/win/spellcheck_win.cpp

@@ -224,7 +224,7 @@ void WindowsSpellChecker::checkSpellingText(
 
 void WindowsSpellChecker::addWord(LPCWSTR word) {
 	for (const auto &[_, spellchecker] : _spellcheckerMap) {
-		spellchecker->Add(Q2WString(word));
+		spellchecker->Add(word);
 	}
 }
 
@@ -233,14 +233,14 @@ void WindowsSpellChecker::removeWord(LPCWSTR word) {
 		ComPtr<ISpellChecker2> spellchecker2;
 		spellchecker->QueryInterface(IID_PPV_ARGS(&spellchecker2));
 		if (spellchecker2) {
-			spellchecker2->Remove(Q2WString(word));
+			spellchecker2->Remove(word);
 		}
 	}
 }
 
 void WindowsSpellChecker::ignoreWord(LPCWSTR word) {
 	for (const auto &[_, spellchecker] : _spellcheckerMap) {
-		spellchecker->Ignore(Q2WString(word));
+		spellchecker->Ignore(word);
 	}
 }
 
@@ -257,6 +257,15 @@ std::unique_ptr<WindowsSpellChecker>& SharedSpellChecker() {
 
 } // namespace
 
+// TODO: Add a better work with the Threading Models.
+// All COM objects should be created asynchronously
+// if we want to work with them asynchronously.
+// Some calls can be made in the main thread before spellchecking
+// (e.g. KnownLanguages), so we have to init it asynchronously first.
+void Init() {
+	crl::async(SharedSpellChecker);
+}
+
 bool IsAvailable() {
 	return IsWindows8OrGreater();
 }

spellcheck/spelling_highlighter.cpp

@@ -157,6 +157,9 @@ SpellingHighlighter::SpellingHighlighter(
 , _coldSpellcheckingTimer([=] { checkChangedText(); })
 , _field(field)
 , _textEdit(field->rawTextEdit()) {
+#ifdef Q_OS_WIN
+	Platform::Spellchecker::Init();
+#endif
 
 	_textEdit->installEventFilter(this);
 	_textEdit->viewport()->installEventFilter(this);