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-rw-r--r--widget/windows/IMMHandler.cpp2410
1 files changed, 2410 insertions, 0 deletions
diff --git a/widget/windows/IMMHandler.cpp b/widget/windows/IMMHandler.cpp
new file mode 100644
index 0000000000..0fd33bdba2
--- /dev/null
+++ b/widget/windows/IMMHandler.cpp
@@ -0,0 +1,2410 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sts=2 sw=2 et cin: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/Logging.h"
+
+#include "IMMHandler.h"
+#include "nsWindow.h"
+#include "nsWindowDefs.h"
+#include "WinIMEHandler.h"
+#include "WinUtils.h"
+#include "KeyboardLayout.h"
+#include <algorithm>
+
+#include "mozilla/CheckedInt.h"
+#include "mozilla/MiscEvents.h"
+#include "mozilla/TextEvents.h"
+#include "mozilla/ToString.h"
+#include "mozilla/WindowsVersion.h"
+
+#ifndef IME_PROP_ACCEPT_WIDE_VKEY
+# define IME_PROP_ACCEPT_WIDE_VKEY 0x20
+#endif
+
+//-------------------------------------------------------------------------
+//
+// from
+// http://download.microsoft.com/download/6/0/9/60908e9e-d2c1-47db-98f6-216af76a235f/msime.h
+// The document for this has been removed from MSDN...
+//
+//-------------------------------------------------------------------------
+
+#define RWM_MOUSE TEXT("MSIMEMouseOperation")
+
+#define IMEMOUSE_NONE 0x00 // no mouse button was pushed
+#define IMEMOUSE_LDOWN 0x01
+#define IMEMOUSE_RDOWN 0x02
+#define IMEMOUSE_MDOWN 0x04
+#define IMEMOUSE_WUP 0x10 // wheel up
+#define IMEMOUSE_WDOWN 0x20 // wheel down
+
+// For collecting other people's log, tell `MOZ_LOG=IMEHandler:4,sync`
+// rather than `MOZ_LOG=IMEHandler:5,sync` since using `5` may create too
+// big file.
+// Therefore you shouldn't use `LogLevel::Verbose` for logging usual behavior.
+extern mozilla::LazyLogModule gIMELog;
+
+static const char* GetBoolName(bool aBool) { return aBool ? "true" : "false"; }
+
+static void HandleSeparator(nsACString& aDesc) {
+ if (!aDesc.IsEmpty()) {
+ aDesc.AppendLiteral(" | ");
+ }
+}
+
+class GetIMEGeneralPropertyName : public nsAutoCString {
+ public:
+ explicit GetIMEGeneralPropertyName(DWORD aFlags) {
+ if (!aFlags) {
+ AppendLiteral("no flags");
+ return;
+ }
+ if (aFlags & IME_PROP_AT_CARET) {
+ AppendLiteral("IME_PROP_AT_CARET");
+ }
+ if (aFlags & IME_PROP_SPECIAL_UI) {
+ HandleSeparator(*this);
+ AppendLiteral("IME_PROP_SPECIAL_UI");
+ }
+ if (aFlags & IME_PROP_CANDLIST_START_FROM_1) {
+ HandleSeparator(*this);
+ AppendLiteral("IME_PROP_CANDLIST_START_FROM_1");
+ }
+ if (aFlags & IME_PROP_UNICODE) {
+ HandleSeparator(*this);
+ AppendLiteral("IME_PROP_UNICODE");
+ }
+ if (aFlags & IME_PROP_COMPLETE_ON_UNSELECT) {
+ HandleSeparator(*this);
+ AppendLiteral("IME_PROP_COMPLETE_ON_UNSELECT");
+ }
+ if (aFlags & IME_PROP_ACCEPT_WIDE_VKEY) {
+ HandleSeparator(*this);
+ AppendLiteral("IME_PROP_ACCEPT_WIDE_VKEY");
+ }
+ }
+ virtual ~GetIMEGeneralPropertyName() {}
+};
+
+class GetIMEUIPropertyName : public nsAutoCString {
+ public:
+ explicit GetIMEUIPropertyName(DWORD aFlags) {
+ if (!aFlags) {
+ AppendLiteral("no flags");
+ return;
+ }
+ if (aFlags & UI_CAP_2700) {
+ AppendLiteral("UI_CAP_2700");
+ }
+ if (aFlags & UI_CAP_ROT90) {
+ HandleSeparator(*this);
+ AppendLiteral("UI_CAP_ROT90");
+ }
+ if (aFlags & UI_CAP_ROTANY) {
+ HandleSeparator(*this);
+ AppendLiteral("UI_CAP_ROTANY");
+ }
+ }
+ virtual ~GetIMEUIPropertyName() {}
+};
+
+class GetReconvertStringLog : public nsAutoCString {
+ public:
+ explicit GetReconvertStringLog(RECONVERTSTRING* aReconv) {
+ AssignLiteral("{ dwSize=");
+ AppendInt(static_cast<uint32_t>(aReconv->dwSize));
+ AppendLiteral(", dwVersion=");
+ AppendInt(static_cast<uint32_t>(aReconv->dwVersion));
+ AppendLiteral(", dwStrLen=");
+ AppendInt(static_cast<uint32_t>(aReconv->dwStrLen));
+ AppendLiteral(", dwStrOffset=");
+ AppendInt(static_cast<uint32_t>(aReconv->dwStrOffset));
+ AppendLiteral(", dwCompStrLen=");
+ AppendInt(static_cast<uint32_t>(aReconv->dwCompStrLen));
+ AppendLiteral(", dwCompStrOffset=");
+ AppendInt(static_cast<uint32_t>(aReconv->dwCompStrOffset));
+ AppendLiteral(", dwTargetStrLen=");
+ AppendInt(static_cast<uint32_t>(aReconv->dwTargetStrLen));
+ AppendLiteral(", dwTargetStrOffset=");
+ AppendInt(static_cast<uint32_t>(aReconv->dwTargetStrOffset));
+ AppendLiteral(", result str=\"");
+ if (aReconv->dwStrLen) {
+ char16_t* strStart = reinterpret_cast<char16_t*>(
+ reinterpret_cast<char*>(aReconv) + aReconv->dwStrOffset);
+ nsDependentString str(strStart, aReconv->dwStrLen);
+ Append(NS_ConvertUTF16toUTF8(str));
+ }
+ AppendLiteral("\" }");
+ }
+ virtual ~GetReconvertStringLog() {}
+};
+
+namespace mozilla {
+namespace widget {
+
+static IMMHandler* gIMMHandler = nullptr;
+
+/******************************************************************************
+ * IMEContext
+ ******************************************************************************/
+
+IMEContext::IMEContext(HWND aWnd) : mWnd(aWnd), mIMC(::ImmGetContext(aWnd)) {}
+
+IMEContext::IMEContext(nsWindow* aWindowBase)
+ : mWnd(aWindowBase->GetWindowHandle()),
+ mIMC(::ImmGetContext(aWindowBase->GetWindowHandle())) {}
+
+void IMEContext::Init(HWND aWnd) {
+ Clear();
+ mWnd = aWnd;
+ mIMC = ::ImmGetContext(mWnd);
+}
+
+void IMEContext::Init(nsWindow* aWindowBase) {
+ Init(aWindowBase->GetWindowHandle());
+}
+
+void IMEContext::Clear() {
+ if (mWnd && mIMC) {
+ ::ImmReleaseContext(mWnd, mIMC);
+ }
+ mWnd = nullptr;
+ mIMC = nullptr;
+}
+
+/******************************************************************************
+ * IMMHandler
+ ******************************************************************************/
+
+static UINT sWM_MSIME_MOUSE = 0; // mouse message for MSIME 98/2000
+
+WritingMode IMMHandler::sWritingModeOfCompositionFont;
+nsString IMMHandler::sIMEName;
+UINT IMMHandler::sCodePage = 0;
+DWORD IMMHandler::sIMEProperty = 0;
+DWORD IMMHandler::sIMEUIProperty = 0;
+bool IMMHandler::sAssumeVerticalWritingModeNotSupported = false;
+bool IMMHandler::sHasFocus = false;
+
+#define IMPL_IS_IME_ACTIVE(aReadableName, aActualName) \
+ bool IMMHandler::Is##aReadableName##Active() { \
+ return sIMEName.Equals(aActualName); \
+ }
+
+IMPL_IS_IME_ACTIVE(ATOK2006, u"ATOK 2006")
+IMPL_IS_IME_ACTIVE(ATOK2007, u"ATOK 2007")
+IMPL_IS_IME_ACTIVE(ATOK2008, u"ATOK 2008")
+IMPL_IS_IME_ACTIVE(ATOK2009, u"ATOK 2009")
+IMPL_IS_IME_ACTIVE(ATOK2010, u"ATOK 2010")
+// NOTE: Even on Windows for en-US, the name of Google Japanese Input is
+// written in Japanese.
+IMPL_IS_IME_ACTIVE(GoogleJapaneseInput,
+ u"Google \x65E5\x672C\x8A9E\x5165\x529B "
+ u"IMM32 \x30E2\x30B8\x30E5\x30FC\x30EB")
+IMPL_IS_IME_ACTIVE(Japanist2003, u"Japanist 2003")
+
+#undef IMPL_IS_IME_ACTIVE
+
+// static
+bool IMMHandler::IsActiveIMEInBlockList() {
+ if (sIMEName.IsEmpty()) {
+ return false;
+ }
+#ifdef _WIN64
+ // ATOK started to be TIP of TSF since 2011. Older than it, i.e., ATOK 2010
+ // and earlier have a lot of problems even for daily use. Perhaps, the
+ // reason is Win 8 has a lot of changes around IMM-IME support and TSF,
+ // and ATOK 2010 is released earlier than Win 8.
+ // ATOK 2006 crashes while converting a word with candidate window.
+ // ATOK 2007 doesn't paint and resize suggest window and candidate window
+ // correctly (showing white window or too big window).
+ // ATOK 2008 and ATOK 2009 crash when user just opens their open state.
+ // ATOK 2010 isn't installable newly on Win 7 or later, but we have a lot of
+ // crash reports.
+ if (IsWin8OrLater() &&
+ (IsATOK2006Active() || IsATOK2007Active() || IsATOK2008Active() ||
+ IsATOK2009Active() || IsATOK2010Active())) {
+ return true;
+ }
+#endif // #ifdef _WIN64
+ return false;
+}
+
+// static
+void IMMHandler::EnsureHandlerInstance() {
+ if (!gIMMHandler) {
+ gIMMHandler = new IMMHandler();
+ }
+}
+
+// static
+void IMMHandler::Initialize() {
+ if (!sWM_MSIME_MOUSE) {
+ sWM_MSIME_MOUSE = ::RegisterWindowMessage(RWM_MOUSE);
+ }
+ sAssumeVerticalWritingModeNotSupported = Preferences::GetBool(
+ "intl.imm.vertical_writing.always_assume_not_supported", false);
+ InitKeyboardLayout(nullptr, ::GetKeyboardLayout(0));
+}
+
+// static
+void IMMHandler::Terminate() {
+ if (!gIMMHandler) return;
+ delete gIMMHandler;
+ gIMMHandler = nullptr;
+}
+
+// static
+bool IMMHandler::IsComposingOnOurEditor() {
+ return gIMMHandler && gIMMHandler->mIsComposing;
+}
+
+// static
+bool IMMHandler::IsComposingWindow(nsWindow* aWindow) {
+ return gIMMHandler && gIMMHandler->mComposingWindow == aWindow;
+}
+
+// static
+bool IMMHandler::IsTopLevelWindowOfComposition(nsWindow* aWindow) {
+ if (!gIMMHandler || !gIMMHandler->mComposingWindow) {
+ return false;
+ }
+ HWND wnd = gIMMHandler->mComposingWindow->GetWindowHandle();
+ return WinUtils::GetTopLevelHWND(wnd, true) == aWindow->GetWindowHandle();
+}
+
+// static
+bool IMMHandler::ShouldDrawCompositionStringOurselves() {
+ // If current IME has special UI or its composition window should not
+ // positioned to caret position, we should now draw composition string
+ // ourselves.
+ return !(sIMEProperty & IME_PROP_SPECIAL_UI) &&
+ (sIMEProperty & IME_PROP_AT_CARET);
+}
+
+// static
+bool IMMHandler::IsVerticalWritingSupported() {
+ // Even if IME claims that they support vertical writing mode but it may not
+ // support vertical writing mode for its candidate window.
+ if (sAssumeVerticalWritingModeNotSupported) {
+ return false;
+ }
+ // Google Japanese Input doesn't support vertical writing mode. We should
+ // return false if it's active IME.
+ if (IsGoogleJapaneseInputActive()) {
+ return false;
+ }
+ return !!(sIMEUIProperty & (UI_CAP_2700 | UI_CAP_ROT90 | UI_CAP_ROTANY));
+}
+
+// static
+void IMMHandler::InitKeyboardLayout(nsWindow* aWindow, HKL aKeyboardLayout) {
+ UINT IMENameLength = ::ImmGetDescriptionW(aKeyboardLayout, nullptr, 0);
+ if (IMENameLength) {
+ // Add room for the terminating null character
+ sIMEName.SetLength(++IMENameLength);
+ IMENameLength =
+ ::ImmGetDescriptionW(aKeyboardLayout, sIMEName.get(), IMENameLength);
+ // Adjust the length to ignore the terminating null character
+ sIMEName.SetLength(IMENameLength);
+ } else {
+ sIMEName.Truncate();
+ }
+
+ WORD langID = LOWORD(aKeyboardLayout);
+ ::GetLocaleInfoW(MAKELCID(langID, SORT_DEFAULT),
+ LOCALE_IDEFAULTANSICODEPAGE | LOCALE_RETURN_NUMBER,
+ (PWSTR)&sCodePage, sizeof(sCodePage) / sizeof(WCHAR));
+ sIMEProperty = ::ImmGetProperty(aKeyboardLayout, IGP_PROPERTY);
+ sIMEUIProperty = ::ImmGetProperty(aKeyboardLayout, IGP_UI);
+
+ // If active IME is a TIP of TSF, we cannot retrieve the name with IMM32 API.
+ // For hacking some bugs of some TIP, we should set an IME name from the
+ // pref.
+ if (sCodePage == 932 && sIMEName.IsEmpty()) {
+ Preferences::GetString("intl.imm.japanese.assume_active_tip_name_as",
+ sIMEName);
+ }
+
+ // Whether the IME supports vertical writing mode might be changed or
+ // some IMEs may need specific font for their UI. Therefore, we should
+ // update composition font forcibly here.
+ if (aWindow) {
+ MaybeAdjustCompositionFont(aWindow, sWritingModeOfCompositionFont, true);
+ }
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::InitKeyboardLayout, aKeyboardLayout=%p (\"%s\"), "
+ "sCodePage=%u, sIMEProperty=%s, sIMEUIProperty=%s",
+ aKeyboardLayout, NS_ConvertUTF16toUTF8(sIMEName).get(), sCodePage,
+ GetIMEGeneralPropertyName(sIMEProperty).get(),
+ GetIMEUIPropertyName(sIMEUIProperty).get()));
+}
+
+// static
+UINT IMMHandler::GetKeyboardCodePage() { return sCodePage; }
+
+// static
+IMENotificationRequests IMMHandler::GetIMENotificationRequests() {
+ return IMENotificationRequests(
+ IMENotificationRequests::NOTIFY_POSITION_CHANGE |
+ IMENotificationRequests::NOTIFY_MOUSE_BUTTON_EVENT_ON_CHAR);
+}
+
+// used for checking the lParam of WM_IME_COMPOSITION
+#define IS_COMPOSING_LPARAM(lParam) \
+ ((lParam) & (GCS_COMPSTR | GCS_COMPATTR | GCS_COMPCLAUSE | GCS_CURSORPOS))
+#define IS_COMMITTING_LPARAM(lParam) ((lParam)&GCS_RESULTSTR)
+// Some IMEs (e.g., the standard IME for Korean) don't have caret position,
+// then, we should not set caret position to compositionchange event.
+#define NO_IME_CARET -1
+
+IMMHandler::IMMHandler()
+ : mComposingWindow(nullptr),
+ mCursorPosition(NO_IME_CARET),
+ mCompositionStart(0),
+ mIsComposing(false) {
+ MOZ_LOG(gIMELog, LogLevel::Debug, ("IMMHandler::IMMHandler is created"));
+}
+
+IMMHandler::~IMMHandler() {
+ if (mIsComposing) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Error,
+ (" IMMHandler::~IMMHandler, ERROR, the instance is still composing"));
+ }
+ MOZ_LOG(gIMELog, LogLevel::Debug, ("IMMHandler::IMMHandler is destroyed"));
+}
+
+nsresult IMMHandler::EnsureClauseArray(int32_t aCount) {
+ NS_ENSURE_ARG_MIN(aCount, 0);
+ mClauseArray.SetCapacity(aCount + 32);
+ return NS_OK;
+}
+
+nsresult IMMHandler::EnsureAttributeArray(int32_t aCount) {
+ NS_ENSURE_ARG_MIN(aCount, 0);
+ mAttributeArray.SetCapacity(aCount + 64);
+ return NS_OK;
+}
+
+// static
+void IMMHandler::CommitComposition(nsWindow* aWindow, bool aForce) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::CommitComposition, aForce=%s, aWindow=%p, hWnd=%p, "
+ "mComposingWindow=%p%s",
+ GetBoolName(aForce), aWindow, aWindow->GetWindowHandle(),
+ gIMMHandler ? gIMMHandler->mComposingWindow : nullptr,
+ gIMMHandler && gIMMHandler->mComposingWindow
+ ? IsComposingOnOurEditor() ? " (composing on editor)"
+ : " (composing on plug-in)"
+ : ""));
+ if (!aForce && !IsComposingWindow(aWindow)) {
+ return;
+ }
+
+ IMEContext context(aWindow);
+ bool associated = context.AssociateDefaultContext();
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::CommitComposition, associated=%s",
+ GetBoolName(associated)));
+
+ if (context.IsValid()) {
+ ::ImmNotifyIME(context.get(), NI_COMPOSITIONSTR, CPS_COMPLETE, 0);
+ ::ImmNotifyIME(context.get(), NI_COMPOSITIONSTR, CPS_CANCEL, 0);
+ }
+
+ if (associated) {
+ context.Disassociate();
+ }
+}
+
+// static
+void IMMHandler::CancelComposition(nsWindow* aWindow, bool aForce) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::CancelComposition, aForce=%s, aWindow=%p, hWnd=%p, "
+ "mComposingWindow=%p%s",
+ GetBoolName(aForce), aWindow, aWindow->GetWindowHandle(),
+ gIMMHandler ? gIMMHandler->mComposingWindow : nullptr,
+ gIMMHandler && gIMMHandler->mComposingWindow
+ ? IsComposingOnOurEditor() ? " (composing on editor)"
+ : " (composing on plug-in)"
+ : ""));
+ if (!aForce && !IsComposingWindow(aWindow)) {
+ return;
+ }
+
+ IMEContext context(aWindow);
+ bool associated = context.AssociateDefaultContext();
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::CancelComposition, associated=%s",
+ GetBoolName(associated)));
+
+ if (context.IsValid()) {
+ ::ImmNotifyIME(context.get(), NI_COMPOSITIONSTR, CPS_CANCEL, 0);
+ }
+
+ if (associated) {
+ context.Disassociate();
+ }
+}
+
+// static
+void IMMHandler::OnFocusChange(bool aFocus, nsWindow* aWindow) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnFocusChange(aFocus=%s, aWindow=%p), sHasFocus=%s, "
+ "IsComposingWindow(aWindow)=%s, aWindow->Destroyed()=%s",
+ GetBoolName(aFocus), aWindow, GetBoolName(sHasFocus),
+ GetBoolName(IsComposingWindow(aWindow)),
+ GetBoolName(aWindow->Destroyed())));
+
+ if (!aFocus) {
+ IMEHandler::MaybeDestroyNativeCaret();
+ if (IsComposingWindow(aWindow) && aWindow->Destroyed()) {
+ CancelComposition(aWindow);
+ }
+ }
+ if (gIMMHandler) {
+ gIMMHandler->mContentSelection.reset();
+ }
+ sHasFocus = aFocus;
+}
+
+// static
+void IMMHandler::OnUpdateComposition(nsWindow* aWindow) {
+ if (!gIMMHandler) {
+ return;
+ }
+
+ IMEContext context(aWindow);
+ gIMMHandler->SetIMERelatedWindowsPos(aWindow, context);
+}
+
+// static
+void IMMHandler::OnSelectionChange(nsWindow* aWindow,
+ const IMENotification& aIMENotification,
+ bool aIsIMMActive) {
+ if (!aIMENotification.mSelectionChangeData.mCausedByComposition &&
+ aIsIMMActive) {
+ MaybeAdjustCompositionFont(
+ aWindow, aIMENotification.mSelectionChangeData.GetWritingMode());
+ }
+ // MaybeAdjustCompositionFont() may create gIMMHandler. So, check it
+ // after a call of MaybeAdjustCompositionFont().
+ if (gIMMHandler) {
+ gIMMHandler->mContentSelection =
+ Some(ContentSelection(aIMENotification.mSelectionChangeData));
+ }
+}
+
+// static
+void IMMHandler::MaybeAdjustCompositionFont(nsWindow* aWindow,
+ const WritingMode& aWritingMode,
+ bool aForceUpdate) {
+ switch (sCodePage) {
+ case 932: // Japanese Shift-JIS
+ case 936: // Simlified Chinese GBK
+ case 949: // Korean
+ case 950: // Traditional Chinese Big5
+ EnsureHandlerInstance();
+ break;
+ default:
+ // If there is no instance of nsIMM32Hander, we shouldn't waste footprint.
+ if (!gIMMHandler) {
+ return;
+ }
+ }
+
+ // Like Navi-Bar of ATOK, some IMEs may require proper composition font even
+ // before sending WM_IME_STARTCOMPOSITION.
+ IMEContext context(aWindow);
+ gIMMHandler->AdjustCompositionFont(aWindow, context, aWritingMode,
+ aForceUpdate);
+}
+
+// static
+bool IMMHandler::ProcessInputLangChangeMessage(nsWindow* aWindow, WPARAM wParam,
+ LPARAM lParam,
+ MSGResult& aResult) {
+ aResult.mResult = 0;
+ aResult.mConsumed = false;
+ // We don't need to create the instance of the handler here.
+ if (gIMMHandler) {
+ gIMMHandler->OnInputLangChange(aWindow, wParam, lParam, aResult);
+ }
+ InitKeyboardLayout(aWindow, reinterpret_cast<HKL>(lParam));
+ // We can release the instance here, because the instance may be never
+ // used. E.g., the new keyboard layout may not use IME, or it may use TSF.
+ Terminate();
+ // Don't return as "processed", the messages should be processed on nsWindow
+ // too.
+ return false;
+}
+
+// static
+bool IMMHandler::ProcessMessage(nsWindow* aWindow, UINT msg, WPARAM& wParam,
+ LPARAM& lParam, MSGResult& aResult) {
+ // XXX We store the composing window in mComposingWindow. If IME messages are
+ // sent to different window, we should commit the old transaction. And also
+ // if the new window handle is not focused, probably, we should not start
+ // the composition, however, such case should not be, it's just bad scenario.
+
+ aResult.mResult = 0;
+ switch (msg) {
+ case WM_INPUTLANGCHANGE:
+ return ProcessInputLangChangeMessage(aWindow, wParam, lParam, aResult);
+ case WM_IME_STARTCOMPOSITION:
+ EnsureHandlerInstance();
+ return gIMMHandler->OnIMEStartComposition(aWindow, aResult);
+ case WM_IME_COMPOSITION:
+ EnsureHandlerInstance();
+ return gIMMHandler->OnIMEComposition(aWindow, wParam, lParam, aResult);
+ case WM_IME_ENDCOMPOSITION:
+ EnsureHandlerInstance();
+ return gIMMHandler->OnIMEEndComposition(aWindow, aResult);
+ case WM_IME_CHAR:
+ return OnIMEChar(aWindow, wParam, lParam, aResult);
+ case WM_IME_NOTIFY:
+ return OnIMENotify(aWindow, wParam, lParam, aResult);
+ case WM_IME_REQUEST:
+ EnsureHandlerInstance();
+ return gIMMHandler->OnIMERequest(aWindow, wParam, lParam, aResult);
+ case WM_IME_SELECT:
+ return OnIMESelect(aWindow, wParam, lParam, aResult);
+ case WM_IME_SETCONTEXT:
+ return OnIMESetContext(aWindow, wParam, lParam, aResult);
+ case WM_KEYDOWN:
+ return OnKeyDownEvent(aWindow, wParam, lParam, aResult);
+ case WM_CHAR:
+ if (!gIMMHandler) {
+ return false;
+ }
+ return gIMMHandler->OnChar(aWindow, wParam, lParam, aResult);
+ default:
+ return false;
+ };
+}
+
+/****************************************************************************
+ * message handlers
+ ****************************************************************************/
+
+void IMMHandler::OnInputLangChange(nsWindow* aWindow, WPARAM wParam,
+ LPARAM lParam, MSGResult& aResult) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnInputLangChange, hWnd=%p, wParam=%08zx, "
+ "lParam=%08" PRIxLPTR,
+ aWindow->GetWindowHandle(), wParam, lParam));
+
+ aWindow->NotifyIME(REQUEST_TO_COMMIT_COMPOSITION);
+ NS_ASSERTION(!mIsComposing, "ResetInputState failed");
+
+ if (mIsComposing) {
+ HandleEndComposition(aWindow);
+ }
+
+ aResult.mConsumed = false;
+}
+
+bool IMMHandler::OnIMEStartComposition(nsWindow* aWindow, MSGResult& aResult) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMEStartComposition, hWnd=%p, mIsComposing=%s",
+ aWindow->GetWindowHandle(), GetBoolName(mIsComposing)));
+ aResult.mConsumed = ShouldDrawCompositionStringOurselves();
+ if (mIsComposing) {
+ NS_WARNING("Composition has been already started");
+ return true;
+ }
+
+ IMEContext context(aWindow);
+ HandleStartComposition(aWindow, context);
+ return true;
+}
+
+bool IMMHandler::OnIMEComposition(nsWindow* aWindow, WPARAM wParam,
+ LPARAM lParam, MSGResult& aResult) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMEComposition, hWnd=%p, lParam=%08" PRIxLPTR
+ ", mIsComposing=%s, "
+ "GCS_RESULTSTR=%s, GCS_COMPSTR=%s, GCS_COMPATTR=%s, GCS_COMPCLAUSE=%s, "
+ "GCS_CURSORPOS=%s,",
+ aWindow->GetWindowHandle(), lParam, GetBoolName(mIsComposing),
+ GetBoolName(lParam & GCS_RESULTSTR), GetBoolName(lParam & GCS_COMPSTR),
+ GetBoolName(lParam & GCS_COMPATTR), GetBoolName(lParam & GCS_COMPCLAUSE),
+ GetBoolName(lParam & GCS_CURSORPOS)));
+
+ IMEContext context(aWindow);
+ aResult.mConsumed = HandleComposition(aWindow, context, lParam);
+ return true;
+}
+
+bool IMMHandler::OnIMEEndComposition(nsWindow* aWindow, MSGResult& aResult) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMEEndComposition, hWnd=%p, mIsComposing=%s",
+ aWindow->GetWindowHandle(), GetBoolName(mIsComposing)));
+
+ aResult.mConsumed = ShouldDrawCompositionStringOurselves();
+ if (!mIsComposing) {
+ return true;
+ }
+
+ // Korean IME posts WM_IME_ENDCOMPOSITION first when we hit space during
+ // composition. Then, we should ignore the message and commit the composition
+ // string at following WM_IME_COMPOSITION.
+ MSG compositionMsg;
+ if (WinUtils::PeekMessage(&compositionMsg, aWindow->GetWindowHandle(),
+ WM_IME_STARTCOMPOSITION, WM_IME_COMPOSITION,
+ PM_NOREMOVE) &&
+ compositionMsg.message == WM_IME_COMPOSITION &&
+ IS_COMMITTING_LPARAM(compositionMsg.lParam)) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::OnIMEEndComposition, WM_IME_ENDCOMPOSITION is "
+ "followed by WM_IME_COMPOSITION, ignoring the message..."));
+ return true;
+ }
+
+ // Otherwise, e.g., ChangJie doesn't post WM_IME_COMPOSITION before
+ // WM_IME_ENDCOMPOSITION when composition string becomes empty.
+ // Then, we should dispatch a compositionupdate event, a compositionchange
+ // event and a compositionend event.
+ // XXX Shouldn't we dispatch the compositionchange event with actual or
+ // latest composition string?
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::OnIMEEndComposition, mCompositionString=\"%s\"%s",
+ NS_ConvertUTF16toUTF8(mCompositionString).get(),
+ mCompositionString.IsEmpty() ? "" : ", but canceling it..."));
+
+ HandleEndComposition(aWindow, &EmptyString());
+
+ return true;
+}
+
+// static
+bool IMMHandler::OnIMEChar(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
+ MSGResult& aResult) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMEChar, hWnd=%p, char=%08zx",
+ aWindow->GetWindowHandle(), wParam));
+
+ // We don't need to fire any compositionchange events from here. This method
+ // will be called when the composition string of the current IME is not drawn
+ // by us and some characters are committed. In that case, the committed
+ // string was processed in nsWindow::OnIMEComposition already.
+
+ // We need to consume the message so that Windows don't send two WM_CHAR msgs
+ aResult.mConsumed = true;
+ return true;
+}
+
+// static
+bool IMMHandler::OnIMECompositionFull(nsWindow* aWindow, MSGResult& aResult) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMECompositionFull, hWnd=%p",
+ aWindow->GetWindowHandle()));
+
+ // not implement yet
+ aResult.mConsumed = false;
+ return true;
+}
+
+// static
+bool IMMHandler::OnIMENotify(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
+ MSGResult& aResult) {
+ switch (wParam) {
+ case IMN_CHANGECANDIDATE:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_CHANGECANDIDATE, "
+ "lParam=%08" PRIxLPTR,
+ aWindow->GetWindowHandle(), lParam));
+ break;
+ case IMN_CLOSECANDIDATE:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_CLOSECANDIDATE, "
+ "lParam=%08" PRIxLPTR,
+ aWindow->GetWindowHandle(), lParam));
+ break;
+ case IMN_CLOSESTATUSWINDOW:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_CLOSESTATUSWINDOW",
+ aWindow->GetWindowHandle()));
+ break;
+ case IMN_GUIDELINE:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_GUIDELINE",
+ aWindow->GetWindowHandle()));
+ break;
+ case IMN_OPENCANDIDATE:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_OPENCANDIDATE, "
+ "lParam=%08" PRIxLPTR,
+ aWindow->GetWindowHandle(), lParam));
+ break;
+ case IMN_OPENSTATUSWINDOW:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_OPENSTATUSWINDOW",
+ aWindow->GetWindowHandle()));
+ break;
+ case IMN_SETCANDIDATEPOS:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_SETCANDIDATEPOS, "
+ "lParam=%08" PRIxLPTR,
+ aWindow->GetWindowHandle(), lParam));
+ break;
+ case IMN_SETCOMPOSITIONFONT:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_SETCOMPOSITIONFONT",
+ aWindow->GetWindowHandle()));
+ break;
+ case IMN_SETCOMPOSITIONWINDOW:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_SETCOMPOSITIONWINDOW",
+ aWindow->GetWindowHandle()));
+ break;
+ case IMN_SETCONVERSIONMODE:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_SETCONVERSIONMODE",
+ aWindow->GetWindowHandle()));
+ break;
+ case IMN_SETOPENSTATUS:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_SETOPENSTATUS",
+ aWindow->GetWindowHandle()));
+ break;
+ case IMN_SETSENTENCEMODE:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_SETSENTENCEMODE",
+ aWindow->GetWindowHandle()));
+ break;
+ case IMN_SETSTATUSWINDOWPOS:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_SETSTATUSWINDOWPOS",
+ aWindow->GetWindowHandle()));
+ break;
+ case IMN_PRIVATE:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMENotify, hWnd=%p, IMN_PRIVATE",
+ aWindow->GetWindowHandle()));
+ break;
+ }
+
+ // not implement yet
+ aResult.mConsumed = false;
+ return true;
+}
+
+bool IMMHandler::OnIMERequest(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
+ MSGResult& aResult) {
+ switch (wParam) {
+ case IMR_RECONVERTSTRING:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMERequest, hWnd=%p, IMR_RECONVERTSTRING",
+ aWindow->GetWindowHandle()));
+ aResult.mConsumed = HandleReconvert(aWindow, lParam, &aResult.mResult);
+ return true;
+ case IMR_QUERYCHARPOSITION:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMERequest, hWnd=%p, IMR_QUERYCHARPOSITION",
+ aWindow->GetWindowHandle()));
+ aResult.mConsumed =
+ HandleQueryCharPosition(aWindow, lParam, &aResult.mResult);
+ return true;
+ case IMR_DOCUMENTFEED:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMERequest, hWnd=%p, IMR_DOCUMENTFEED",
+ aWindow->GetWindowHandle()));
+ aResult.mConsumed = HandleDocumentFeed(aWindow, lParam, &aResult.mResult);
+ return true;
+ default:
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMERequest, hWnd=%p, wParam=%08zx",
+ aWindow->GetWindowHandle(), wParam));
+ aResult.mConsumed = false;
+ return true;
+ }
+}
+
+// static
+bool IMMHandler::OnIMESelect(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
+ MSGResult& aResult) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMESelect, hWnd=%p, wParam=%08zx, lParam=%08" PRIxLPTR,
+ aWindow->GetWindowHandle(), wParam, lParam));
+
+ // not implement yet
+ aResult.mConsumed = false;
+ return true;
+}
+
+// static
+bool IMMHandler::OnIMESetContext(nsWindow* aWindow, WPARAM wParam,
+ LPARAM lParam, MSGResult& aResult) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnIMESetContext, hWnd=%p, %s, lParam=%08" PRIxLPTR,
+ aWindow->GetWindowHandle(), wParam ? "Active" : "Deactive", lParam));
+
+ aResult.mConsumed = false;
+
+ // NOTE: If the aWindow is top level window of the composing window because
+ // when a window on deactive window gets focus, WM_IME_SETCONTEXT (wParam is
+ // TRUE) is sent to the top level window first. After that,
+ // WM_IME_SETCONTEXT (wParam is FALSE) is sent to the top level window.
+ // Finally, WM_IME_SETCONTEXT (wParam is TRUE) is sent to the focused window.
+ // The top level window never becomes composing window, so, we can ignore
+ // the WM_IME_SETCONTEXT on the top level window.
+ if (IsTopLevelWindowOfComposition(aWindow)) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::OnIMESetContext, hWnd=%p is top level window",
+ aWindow->GetWindowHandle()));
+ return true;
+ }
+
+ // When IME context is activating on another window,
+ // we should commit the old composition on the old window.
+ bool cancelComposition = false;
+ if (wParam && gIMMHandler) {
+ cancelComposition = gIMMHandler->CommitCompositionOnPreviousWindow(aWindow);
+ }
+
+ if (wParam && (lParam & ISC_SHOWUICOMPOSITIONWINDOW) &&
+ ShouldDrawCompositionStringOurselves()) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::OnIMESetContext, ISC_SHOWUICOMPOSITIONWINDOW is "
+ "removed"));
+ lParam &= ~ISC_SHOWUICOMPOSITIONWINDOW;
+ }
+
+ // We should sent WM_IME_SETCONTEXT to the DefWndProc here because the
+ // ancestor windows shouldn't receive this message. If they receive the
+ // message, we cannot know whether which window is the target of the message.
+ aResult.mResult = ::DefWindowProc(aWindow->GetWindowHandle(),
+ WM_IME_SETCONTEXT, wParam, lParam);
+
+ // Cancel composition on the new window if we committed our composition on
+ // another window.
+ if (cancelComposition) {
+ CancelComposition(aWindow, true);
+ }
+
+ aResult.mConsumed = true;
+ return true;
+}
+
+bool IMMHandler::OnChar(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
+ MSGResult& aResult) {
+ // The return value must be same as aResult.mConsumed because only when we
+ // consume the message, the caller shouldn't do anything anymore but
+ // otherwise, the caller should handle the message.
+ aResult.mConsumed = false;
+ if (IsIMECharRecordsEmpty()) {
+ return aResult.mConsumed;
+ }
+ WPARAM recWParam;
+ LPARAM recLParam;
+ DequeueIMECharRecords(recWParam, recLParam);
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ ("IMMHandler::OnChar, aWindow=%p, wParam=%08zx, lParam=%08" PRIxLPTR ", "
+ "recorded: wParam=%08zx, lParam=%08" PRIxLPTR,
+ aWindow->GetWindowHandle(), wParam, lParam, recWParam, recLParam));
+ // If an unexpected char message comes, we should reset the records,
+ // of course, this shouldn't happen.
+ if (recWParam != wParam || recLParam != lParam) {
+ ResetIMECharRecords();
+ return aResult.mConsumed;
+ }
+ // Eat the char message which is caused by WM_IME_CHAR because we should
+ // have processed the IME messages, so, this message could be come from
+ // a windowless plug-in.
+ aResult.mConsumed = true;
+ return aResult.mConsumed;
+}
+
+/****************************************************************************
+ * others
+ ****************************************************************************/
+
+TextEventDispatcher* IMMHandler::GetTextEventDispatcherFor(nsWindow* aWindow) {
+ return aWindow == mComposingWindow && mDispatcher
+ ? mDispatcher.get()
+ : aWindow->GetTextEventDispatcher();
+}
+
+void IMMHandler::HandleStartComposition(nsWindow* aWindow,
+ const IMEContext& aContext) {
+ MOZ_ASSERT(!mIsComposing,
+ "HandleStartComposition is called but mIsComposing is TRUE");
+
+ const Maybe<ContentSelection>& contentSelection =
+ GetContentSelectionWithQueryIfNothing(aWindow);
+ if (contentSelection.isNothing()) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::HandleStartComposition, FAILED, due to "
+ "Selection::GetContentSelectionWithQueryIfNothing() failure"));
+ return;
+ }
+ if (!contentSelection->HasRange()) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::HandleStartComposition, FAILED, due to "
+ "there is no selection"));
+ return;
+ }
+
+ AdjustCompositionFont(aWindow, aContext, contentSelection->WritingModeRef());
+
+ mCompositionStart = contentSelection->OffsetAndDataRef().StartOffset();
+ mCursorPosition = NO_IME_CARET;
+
+ RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcherFor(aWindow);
+ nsresult rv = dispatcher->BeginNativeInputTransaction();
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::HandleStartComposition, FAILED due to "
+ "TextEventDispatcher::BeginNativeInputTransaction() failure"));
+ return;
+ }
+ WidgetEventTime eventTime = aWindow->CurrentMessageWidgetEventTime();
+ nsEventStatus status;
+ rv = dispatcher->StartComposition(status, &eventTime);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::HandleStartComposition, FAILED, due to "
+ "TextEventDispatcher::StartComposition() failure"));
+ return;
+ }
+
+ mIsComposing = true;
+ mComposingWindow = aWindow;
+ mDispatcher = dispatcher;
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleStartComposition, START composition, "
+ "mCompositionStart=%u",
+ mCompositionStart));
+}
+
+bool IMMHandler::HandleComposition(nsWindow* aWindow,
+ const IMEContext& aContext, LPARAM lParam) {
+ // for bug #60050
+ // MS-IME 95/97/98/2000 may send WM_IME_COMPOSITION with non-conversion
+ // mode before it send WM_IME_STARTCOMPOSITION.
+ // However, ATOK sends a WM_IME_COMPOSITION before WM_IME_STARTCOMPOSITION,
+ // and if we access ATOK via some APIs, ATOK will sometimes fail to
+ // initialize its state. If WM_IME_STARTCOMPOSITION is already in the
+ // message queue, we should ignore the strange WM_IME_COMPOSITION message and
+ // skip to the next. So, we should look for next composition message
+ // (WM_IME_STARTCOMPOSITION or WM_IME_ENDCOMPOSITION or WM_IME_COMPOSITION),
+ // and if it's WM_IME_STARTCOMPOSITION, and one more next composition message
+ // is WM_IME_COMPOSITION, current IME is ATOK, probably. Otherwise, we
+ // should start composition forcibly.
+ if (!mIsComposing) {
+ MSG msg1, msg2;
+ HWND wnd = aWindow->GetWindowHandle();
+ if (WinUtils::PeekMessage(&msg1, wnd, WM_IME_STARTCOMPOSITION,
+ WM_IME_COMPOSITION, PM_NOREMOVE) &&
+ msg1.message == WM_IME_STARTCOMPOSITION &&
+ WinUtils::PeekMessage(&msg2, wnd, WM_IME_ENDCOMPOSITION,
+ WM_IME_COMPOSITION, PM_NOREMOVE) &&
+ msg2.message == WM_IME_COMPOSITION) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleComposition, Ignores due to find a "
+ "WM_IME_STARTCOMPOSITION"));
+ return ShouldDrawCompositionStringOurselves();
+ }
+ }
+
+ bool startCompositionMessageHasBeenSent = mIsComposing;
+
+ //
+ // This catches a fixed result
+ //
+ if (IS_COMMITTING_LPARAM(lParam)) {
+ if (!mIsComposing) {
+ HandleStartComposition(aWindow, aContext);
+ }
+
+ GetCompositionString(aContext, GCS_RESULTSTR, mCompositionString);
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleComposition, GCS_RESULTSTR"));
+
+ HandleEndComposition(aWindow, &mCompositionString);
+
+ if (!IS_COMPOSING_LPARAM(lParam)) {
+ return ShouldDrawCompositionStringOurselves();
+ }
+ }
+
+ //
+ // This provides us with a composition string
+ //
+ if (!mIsComposing) {
+ HandleStartComposition(aWindow, aContext);
+ }
+
+ //--------------------------------------------------------
+ // 1. Get GCS_COMPSTR
+ //--------------------------------------------------------
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleComposition, GCS_COMPSTR"));
+
+ nsAutoString previousCompositionString(mCompositionString);
+ GetCompositionString(aContext, GCS_COMPSTR, mCompositionString);
+
+ if (!IS_COMPOSING_LPARAM(lParam)) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ (" IMMHandler::HandleComposition, lParam doesn't indicate composing, "
+ "mCompositionString=\"%s\", previousCompositionString=\"%s\"",
+ NS_ConvertUTF16toUTF8(mCompositionString).get(),
+ NS_ConvertUTF16toUTF8(previousCompositionString).get()));
+
+ // If composition string isn't changed, we can trust the lParam.
+ // So, we need to do nothing.
+ if (previousCompositionString == mCompositionString) {
+ return ShouldDrawCompositionStringOurselves();
+ }
+
+ // IME may send WM_IME_COMPOSITION without composing lParam values
+ // when composition string becomes empty (e.g., using Backspace key).
+ // If composition string is empty, we should dispatch a compositionchange
+ // event with empty string and clear the clause information.
+ if (mCompositionString.IsEmpty()) {
+ mClauseArray.Clear();
+ mAttributeArray.Clear();
+ mCursorPosition = 0;
+ DispatchCompositionChangeEvent(aWindow, aContext);
+ return ShouldDrawCompositionStringOurselves();
+ }
+
+ // Otherwise, we cannot trust the lParam value. We might need to
+ // dispatch compositionchange event with the latest composition string
+ // information.
+ }
+
+ // See https://bugzilla.mozilla.org/show_bug.cgi?id=296339
+ if (mCompositionString.IsEmpty() && !startCompositionMessageHasBeenSent) {
+ // In this case, maybe, the sender is MSPinYin. That sends *only*
+ // WM_IME_COMPOSITION with GCS_COMP* and GCS_RESULT* when
+ // user inputted the Chinese full stop. So, that doesn't send
+ // WM_IME_STARTCOMPOSITION and WM_IME_ENDCOMPOSITION.
+ // If WM_IME_STARTCOMPOSITION was not sent and the composition
+ // string is null (it indicates the composition transaction ended),
+ // WM_IME_ENDCOMPOSITION may not be sent. If so, we cannot run
+ // HandleEndComposition() in other place.
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::HandleComposition, Aborting GCS_COMPSTR"));
+ HandleEndComposition(aWindow);
+ return IS_COMMITTING_LPARAM(lParam);
+ }
+
+ //--------------------------------------------------------
+ // 2. Get GCS_COMPCLAUSE
+ //--------------------------------------------------------
+ long clauseArrayLength =
+ ::ImmGetCompositionStringW(aContext.get(), GCS_COMPCLAUSE, nullptr, 0);
+ clauseArrayLength /= sizeof(uint32_t);
+
+ if (clauseArrayLength > 0) {
+ nsresult rv = EnsureClauseArray(clauseArrayLength);
+ NS_ENSURE_SUCCESS(rv, false);
+
+ // Intelligent ABC IME (Simplified Chinese IME, the code page is 936)
+ // will crash in ImmGetCompositionStringW for GCS_COMPCLAUSE (bug 424663).
+ // See comment 35 of the bug for the detail. Therefore, we should use A
+ // API for it, however, we should not kill Unicode support on all IMEs.
+ bool useA_API = !(sIMEProperty & IME_PROP_UNICODE);
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::HandleComposition, GCS_COMPCLAUSE, useA_API=%s",
+ useA_API ? "TRUE" : "FALSE"));
+
+ long clauseArrayLength2 =
+ useA_API ? ::ImmGetCompositionStringA(
+ aContext.get(), GCS_COMPCLAUSE, mClauseArray.Elements(),
+ mClauseArray.Capacity() * sizeof(uint32_t))
+ : ::ImmGetCompositionStringW(
+ aContext.get(), GCS_COMPCLAUSE, mClauseArray.Elements(),
+ mClauseArray.Capacity() * sizeof(uint32_t));
+ clauseArrayLength2 /= sizeof(uint32_t);
+
+ if (clauseArrayLength != clauseArrayLength2) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::HandleComposition, GCS_COMPCLAUSE, "
+ "clauseArrayLength=%ld but clauseArrayLength2=%ld",
+ clauseArrayLength, clauseArrayLength2));
+ if (clauseArrayLength > clauseArrayLength2)
+ clauseArrayLength = clauseArrayLength2;
+ }
+
+ if (useA_API && clauseArrayLength > 0) {
+ // Convert each values of sIMECompClauseArray. The values mean offset of
+ // the clauses in ANSI string. But we need the values in Unicode string.
+ nsAutoCString compANSIStr;
+ if (ConvertToANSIString(mCompositionString, GetKeyboardCodePage(),
+ compANSIStr)) {
+ uint32_t maxlen = compANSIStr.Length();
+ mClauseArray.SetLength(clauseArrayLength);
+ mClauseArray[0] = 0; // first value must be 0
+ for (int32_t i = 1; i < clauseArrayLength; i++) {
+ uint32_t len = std::min(mClauseArray[i], maxlen);
+ mClauseArray[i] =
+ ::MultiByteToWideChar(GetKeyboardCodePage(), MB_PRECOMPOSED,
+ (LPCSTR)compANSIStr.get(), len, nullptr, 0);
+ }
+ }
+ }
+ }
+ // compClauseArrayLength may be negative. I.e., ImmGetCompositionStringW
+ // may return an error code.
+ mClauseArray.SetLength(std::max<long>(0, clauseArrayLength));
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::HandleComposition, GCS_COMPCLAUSE, mClauseLength=%zu",
+ mClauseArray.Length()));
+
+ //--------------------------------------------------------
+ // 3. Get GCS_COMPATTR
+ //--------------------------------------------------------
+ // This provides us with the attribute string necessary
+ // for doing hiliting
+ long attrArrayLength =
+ ::ImmGetCompositionStringW(aContext.get(), GCS_COMPATTR, nullptr, 0);
+ attrArrayLength /= sizeof(uint8_t);
+
+ if (attrArrayLength > 0) {
+ nsresult rv = EnsureAttributeArray(attrArrayLength);
+ NS_ENSURE_SUCCESS(rv, false);
+ attrArrayLength = ::ImmGetCompositionStringW(
+ aContext.get(), GCS_COMPATTR, mAttributeArray.Elements(),
+ mAttributeArray.Capacity() * sizeof(uint8_t));
+ }
+
+ // attrStrLen may be negative. I.e., ImmGetCompositionStringW may return an
+ // error code.
+ mAttributeArray.SetLength(std::max<long>(0, attrArrayLength));
+
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ (" IMMHandler::HandleComposition, GCS_COMPATTR, mAttributeLength=%zu",
+ mAttributeArray.Length()));
+
+ //--------------------------------------------------------
+ // 4. Get GCS_CURSOPOS
+ //--------------------------------------------------------
+ // Some IMEs (e.g., the standard IME for Korean) don't have caret position.
+ if (lParam & GCS_CURSORPOS) {
+ mCursorPosition =
+ ::ImmGetCompositionStringW(aContext.get(), GCS_CURSORPOS, nullptr, 0);
+ if (mCursorPosition < 0) {
+ mCursorPosition = NO_IME_CARET; // The result is error
+ }
+ } else {
+ mCursorPosition = NO_IME_CARET;
+ }
+
+ NS_ASSERTION(mCursorPosition <= (long)mCompositionString.Length(),
+ "illegal pos");
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::HandleComposition, GCS_CURSORPOS, mCursorPosition=%d",
+ mCursorPosition));
+
+ //--------------------------------------------------------
+ // 5. Send the compositionchange event
+ //--------------------------------------------------------
+ DispatchCompositionChangeEvent(aWindow, aContext);
+
+ return ShouldDrawCompositionStringOurselves();
+}
+
+void IMMHandler::HandleEndComposition(nsWindow* aWindow,
+ const nsAString* aCommitString) {
+ MOZ_ASSERT(mIsComposing,
+ "HandleEndComposition is called but mIsComposing is FALSE");
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleEndComposition(aWindow=0x%p, aCommitString=0x%p "
+ "(\"%s\"))",
+ aWindow, aCommitString,
+ aCommitString ? NS_ConvertUTF16toUTF8(*aCommitString).get() : ""));
+
+ IMEHandler::MaybeDestroyNativeCaret();
+
+ RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcherFor(aWindow);
+ nsresult rv = dispatcher->BeginNativeInputTransaction();
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::HandleEndComposition, FAILED due to "
+ "TextEventDispatcher::BeginNativeInputTransaction() failure"));
+ return;
+ }
+ WidgetEventTime eventTime = aWindow->CurrentMessageWidgetEventTime();
+ nsEventStatus status;
+ rv = dispatcher->CommitComposition(status, aCommitString, &eventTime);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::HandleStartComposition, FAILED, due to "
+ "TextEventDispatcher::CommitComposition() failure"));
+ return;
+ }
+ mIsComposing = false;
+ // XXX aWindow and mComposingWindow are always same??
+ mComposingWindow = nullptr;
+ mDispatcher = nullptr;
+}
+
+bool IMMHandler::HandleReconvert(nsWindow* aWindow, LPARAM lParam,
+ LRESULT* oResult) {
+ *oResult = 0;
+ RECONVERTSTRING* pReconv = reinterpret_cast<RECONVERTSTRING*>(lParam);
+
+ const Maybe<ContentSelection>& contentSelection =
+ GetContentSelectionWithQueryIfNothing(aWindow);
+ if (contentSelection.isNothing()) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleReconvert, FAILED, due to "
+ "Selection::GetContentSelectionWithQueryIfNothing() failure"));
+ return false;
+ }
+
+ const uint32_t len = contentSelection->HasRange()
+ ? contentSelection->OffsetAndDataRef().Length()
+ : 0u;
+ uint32_t needSize = sizeof(RECONVERTSTRING) + len * sizeof(WCHAR);
+
+ if (!pReconv) {
+ // Return need size to reconvert.
+ if (len == 0) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleReconvert, There are not selected text"));
+ return false;
+ }
+ *oResult = needSize;
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleReconvert, succeeded, result=%" PRIdLPTR,
+ *oResult));
+ return true;
+ }
+
+ if (pReconv->dwSize < needSize) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleReconvert, FAILED, pReconv->dwSize=%ld, "
+ "needSize=%u",
+ pReconv->dwSize, needSize));
+ return false;
+ }
+
+ *oResult = needSize;
+
+ // Fill reconvert struct
+ pReconv->dwVersion = 0;
+ pReconv->dwStrLen = len;
+ pReconv->dwStrOffset = sizeof(RECONVERTSTRING);
+ pReconv->dwCompStrLen = len;
+ pReconv->dwCompStrOffset = 0;
+ pReconv->dwTargetStrLen = len;
+ pReconv->dwTargetStrOffset = 0;
+
+ if (len) {
+ ::CopyMemory(reinterpret_cast<LPVOID>(lParam + sizeof(RECONVERTSTRING)),
+ contentSelection->OffsetAndDataRef().DataRef().get(),
+ len * sizeof(WCHAR));
+ }
+
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleReconvert, SUCCEEDED, pReconv=%s, result=%" PRIdLPTR,
+ GetReconvertStringLog(pReconv).get(), *oResult));
+
+ return true;
+}
+
+bool IMMHandler::HandleQueryCharPosition(nsWindow* aWindow, LPARAM lParam,
+ LRESULT* oResult) {
+ uint32_t len = mIsComposing ? mCompositionString.Length() : 0;
+ *oResult = false;
+ IMECHARPOSITION* pCharPosition = reinterpret_cast<IMECHARPOSITION*>(lParam);
+ if (!pCharPosition) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleQueryCharPosition, FAILED, due to "
+ "pCharPosition is null"));
+ return false;
+ }
+ if (pCharPosition->dwSize < sizeof(IMECHARPOSITION)) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleReconvert, FAILED, pCharPosition->dwSize=%lu, "
+ "sizeof(IMECHARPOSITION)=%zu",
+ pCharPosition->dwSize, sizeof(IMECHARPOSITION)));
+ return false;
+ }
+ if (::GetFocus() != aWindow->GetWindowHandle()) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleReconvert, FAILED, ::GetFocus()=%p, "
+ "OurWindowHandle=%p",
+ ::GetFocus(), aWindow->GetWindowHandle()));
+ return false;
+ }
+ if (pCharPosition->dwCharPos > len) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleQueryCharPosition, FAILED, "
+ "pCharPosition->dwCharPos=%ld, len=%u",
+ pCharPosition->dwCharPos, len));
+ return false;
+ }
+
+ LayoutDeviceIntRect r;
+ bool ret =
+ GetCharacterRectOfSelectedTextAt(aWindow, pCharPosition->dwCharPos, r);
+ NS_ENSURE_TRUE(ret, false);
+
+ LayoutDeviceIntRect screenRect;
+ // We always need top level window that is owner window of the popup window
+ // even if the content of the popup window has focus.
+ ResolveIMECaretPos(aWindow->GetTopLevelWindow(false), r, nullptr, screenRect);
+
+ // XXX This might need to check writing mode. However, MSDN doesn't explain
+ // how to set the values in vertical writing mode. Additionally, IME
+ // doesn't work well with top-left of the character (this is explicitly
+ // documented) and its horizontal width. So, it might be better to set
+ // top-right corner of the character and horizontal width, but we're not
+ // sure if it doesn't cause any problems with a lot of IMEs...
+ pCharPosition->pt.x = screenRect.X();
+ pCharPosition->pt.y = screenRect.Y();
+
+ pCharPosition->cLineHeight = r.Height();
+
+ WidgetQueryContentEvent queryEditorRectEvent(true, eQueryEditorRect, aWindow);
+ aWindow->InitEvent(queryEditorRectEvent);
+ DispatchEvent(aWindow, queryEditorRectEvent);
+ if (NS_WARN_IF(queryEditorRectEvent.Failed())) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::HandleQueryCharPosition, eQueryEditorRect failed"));
+ ::GetWindowRect(aWindow->GetWindowHandle(), &pCharPosition->rcDocument);
+ } else {
+ LayoutDeviceIntRect editorRectInWindow = queryEditorRectEvent.mReply->mRect;
+ nsWindow* window = !!queryEditorRectEvent.mReply->mFocusedWidget
+ ? static_cast<nsWindow*>(
+ queryEditorRectEvent.mReply->mFocusedWidget)
+ : aWindow;
+ LayoutDeviceIntRect editorRectInScreen;
+ ResolveIMECaretPos(window, editorRectInWindow, nullptr, editorRectInScreen);
+ ::SetRect(&pCharPosition->rcDocument, editorRectInScreen.X(),
+ editorRectInScreen.Y(), editorRectInScreen.XMost(),
+ editorRectInScreen.YMost());
+ }
+
+ *oResult = TRUE;
+
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleQueryCharPosition, SUCCEEDED, pCharPosition={ "
+ "pt={ x=%ld, y=%ld }, cLineHeight=%d, rcDocument={ left=%ld, top=%ld, "
+ "right=%ld, bottom=%ld } }",
+ pCharPosition->pt.x, pCharPosition->pt.y, pCharPosition->cLineHeight,
+ pCharPosition->rcDocument.left, pCharPosition->rcDocument.top,
+ pCharPosition->rcDocument.right, pCharPosition->rcDocument.bottom));
+ return true;
+}
+
+bool IMMHandler::HandleDocumentFeed(nsWindow* aWindow, LPARAM lParam,
+ LRESULT* oResult) {
+ *oResult = 0;
+ RECONVERTSTRING* pReconv = reinterpret_cast<RECONVERTSTRING*>(lParam);
+
+ LayoutDeviceIntPoint point(0, 0);
+
+ bool hasCompositionString =
+ mIsComposing && ShouldDrawCompositionStringOurselves();
+
+ int32_t targetOffset, targetLength;
+ if (!hasCompositionString) {
+ const Maybe<ContentSelection>& contentSelection =
+ GetContentSelectionWithQueryIfNothing(aWindow);
+ if (contentSelection.isNothing()) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleDocumentFeed, FAILED, due to "
+ "Selection::GetContentSelectionWithQueryIfNothing() failure"));
+ return false;
+ }
+ if (contentSelection->HasRange()) {
+ targetOffset = static_cast<int32_t>(
+ contentSelection->OffsetAndDataRef().StartOffset());
+ targetLength =
+ static_cast<int32_t>(contentSelection->OffsetAndDataRef().Length());
+ } else {
+ // If there is no selection range, let's return all text in the editor.
+ targetOffset = 0;
+ targetLength = INT32_MAX;
+ }
+ } else {
+ targetOffset = int32_t(mCompositionStart);
+ targetLength = int32_t(mCompositionString.Length());
+ }
+
+ // XXX nsString::Find and nsString::RFind take int32_t for offset, so,
+ // we cannot support this message when the current offset is larger than
+ // INT32_MAX.
+ if (targetOffset < 0 || targetLength < 0 || targetOffset + targetLength < 0) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleDocumentFeed, FAILED, "
+ "due to the selection is out of range"));
+ return false;
+ }
+
+ // Get all contents of the focused editor.
+ WidgetQueryContentEvent queryTextContentEvent(true, eQueryTextContent,
+ aWindow);
+ queryTextContentEvent.InitForQueryTextContent(0, UINT32_MAX);
+ aWindow->InitEvent(queryTextContentEvent, &point);
+ DispatchEvent(aWindow, queryTextContentEvent);
+ if (NS_WARN_IF(queryTextContentEvent.Failed())) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleDocumentFeed, FAILED, "
+ "due to eQueryTextContent failure"));
+ return false;
+ }
+
+ nsAutoString str(queryTextContentEvent.mReply->DataRef());
+ if (targetOffset > static_cast<int32_t>(str.Length())) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::HandleDocumentFeed, FAILED, "
+ "due to the caret offset is invalid"));
+ return false;
+ }
+
+ // Get the focused paragraph, we decide that it starts from the previous CRLF
+ // (or start of the editor) to the next one (or the end of the editor).
+ int32_t paragraphStart = 0;
+ if (targetOffset > 0) {
+ paragraphStart = Substring(str, 0, targetOffset).RFind(u"\n") + 1;
+ }
+ int32_t paragraphEnd = str.Find(u"\r", targetOffset + targetLength);
+ if (paragraphEnd < 0) {
+ paragraphEnd = str.Length();
+ }
+ nsDependentSubstring paragraph(str, paragraphStart,
+ paragraphEnd - paragraphStart);
+
+ uint32_t len = paragraph.Length();
+ uint32_t needSize = sizeof(RECONVERTSTRING) + len * sizeof(WCHAR);
+
+ if (!pReconv) {
+ *oResult = needSize;
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleDocumentFeed, succeeded, result=%" PRIdLPTR,
+ *oResult));
+ return true;
+ }
+
+ if (pReconv->dwSize < needSize) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleDocumentFeed, FAILED, "
+ "pReconv->dwSize=%ld, needSize=%u",
+ pReconv->dwSize, needSize));
+ return false;
+ }
+
+ // Fill reconvert struct
+ pReconv->dwVersion = 0;
+ pReconv->dwStrLen = len;
+ pReconv->dwStrOffset = sizeof(RECONVERTSTRING);
+ if (hasCompositionString) {
+ pReconv->dwCompStrLen = targetLength;
+ pReconv->dwCompStrOffset = (targetOffset - paragraphStart) * sizeof(WCHAR);
+ // Set composition target clause information
+ uint32_t offset, length;
+ if (!GetTargetClauseRange(&offset, &length)) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::HandleDocumentFeed, FAILED, "
+ "due to IMMHandler::GetTargetClauseRange() failure"));
+ return false;
+ }
+ pReconv->dwTargetStrLen = length;
+ pReconv->dwTargetStrOffset = (offset - paragraphStart) * sizeof(WCHAR);
+ } else {
+ pReconv->dwTargetStrLen = targetLength;
+ pReconv->dwTargetStrOffset =
+ (targetOffset - paragraphStart) * sizeof(WCHAR);
+ // There is no composition string, so, the length is zero but we should
+ // set the cursor offset to the composition str offset.
+ pReconv->dwCompStrLen = 0;
+ pReconv->dwCompStrOffset = pReconv->dwTargetStrOffset;
+ }
+
+ *oResult = needSize;
+ ::CopyMemory(reinterpret_cast<LPVOID>(lParam + sizeof(RECONVERTSTRING)),
+ paragraph.BeginReading(), len * sizeof(WCHAR));
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::HandleDocumentFeed, SUCCEEDED, pReconv=%s, "
+ "result=%" PRIdLPTR,
+ GetReconvertStringLog(pReconv).get(), *oResult));
+
+ return true;
+}
+
+bool IMMHandler::CommitCompositionOnPreviousWindow(nsWindow* aWindow) {
+ if (!mComposingWindow || mComposingWindow == aWindow) {
+ return false;
+ }
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::CommitCompositionOnPreviousWindow, mIsComposing=%s",
+ GetBoolName(mIsComposing)));
+
+ // If we have composition, we should dispatch composition events internally.
+ if (mIsComposing) {
+ IMEContext context(mComposingWindow);
+ NS_ASSERTION(context.IsValid(), "IME context must be valid");
+
+ HandleEndComposition(mComposingWindow);
+ return true;
+ }
+
+ return false;
+}
+
+static TextRangeType PlatformToNSAttr(uint8_t aAttr) {
+ switch (aAttr) {
+ case ATTR_INPUT_ERROR:
+ // case ATTR_FIXEDCONVERTED:
+ case ATTR_INPUT:
+ return TextRangeType::eRawClause;
+ case ATTR_CONVERTED:
+ return TextRangeType::eConvertedClause;
+ case ATTR_TARGET_NOTCONVERTED:
+ return TextRangeType::eSelectedRawClause;
+ case ATTR_TARGET_CONVERTED:
+ return TextRangeType::eSelectedClause;
+ default:
+ NS_ASSERTION(false, "unknown attribute");
+ return TextRangeType::eCaret;
+ }
+}
+
+// static
+void IMMHandler::DispatchEvent(nsWindow* aWindow, WidgetGUIEvent& aEvent) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ ("IMMHandler::DispatchEvent(aWindow=0x%p, aEvent={ mMessage=%s }, "
+ "aWindow->Destroyed()=%s",
+ aWindow, ToChar(aEvent.mMessage), GetBoolName(aWindow->Destroyed())));
+
+ if (aWindow->Destroyed()) {
+ return;
+ }
+
+ aWindow->DispatchWindowEvent(aEvent);
+}
+
+void IMMHandler::DispatchCompositionChangeEvent(nsWindow* aWindow,
+ const IMEContext& aContext) {
+ NS_ASSERTION(mIsComposing, "conflict state");
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::DispatchCompositionChangeEvent"));
+
+ // If we don't need to draw composition string ourselves, we don't need to
+ // fire compositionchange event during composing.
+ if (!ShouldDrawCompositionStringOurselves()) {
+ // But we need to adjust composition window pos and native caret pos, here.
+ SetIMERelatedWindowsPos(aWindow, aContext);
+ return;
+ }
+
+ RefPtr<nsWindow> kungFuDeathGrip(aWindow);
+ RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcherFor(aWindow);
+ nsresult rv = dispatcher->BeginNativeInputTransaction();
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::DispatchCompositionChangeEvent, FAILED due to "
+ "TextEventDispatcher::BeginNativeInputTransaction() failure"));
+ return;
+ }
+
+ // NOTE: Calling SetIMERelatedWindowsPos() from this method will be failure
+ // in e10s mode. compositionchange event will notify this of
+ // NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED, then
+ // SetIMERelatedWindowsPos() will be called.
+
+ // XXX Sogou (Simplified Chinese IME) returns contradictory values:
+ // The cursor position is actual cursor position. However, other values
+ // (composition string and attributes) are empty.
+
+ if (mCompositionString.IsEmpty()) {
+ // Don't append clause information if composition string is empty.
+ } else if (mClauseArray.IsEmpty()) {
+ // Some IMEs don't return clause array information, then, we assume that
+ // all characters in the composition string are in one clause.
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::DispatchCompositionChangeEvent, "
+ "mClauseArray.Length()=0"));
+ rv = dispatcher->SetPendingComposition(mCompositionString, nullptr);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::DispatchCompositionChangeEvent, FAILED due to"
+ "TextEventDispatcher::SetPendingComposition() failure"));
+ return;
+ }
+ } else {
+ // iterate over the attributes
+ rv = dispatcher->SetPendingCompositionString(mCompositionString);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::DispatchCompositionChangeEvent, FAILED due to"
+ "TextEventDispatcher::SetPendingCompositionString() failure"));
+ return;
+ }
+ uint32_t lastOffset = 0;
+ for (uint32_t i = 0; i < mClauseArray.Length() - 1; i++) {
+ uint32_t current = mClauseArray[i + 1];
+ if (current > mCompositionString.Length()) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::DispatchCompositionChangeEvent, "
+ "mClauseArray[%u]=%u. "
+ "This is larger than mCompositionString.Length()=%zu",
+ i + 1, current, mCompositionString.Length()));
+ current = int32_t(mCompositionString.Length());
+ }
+
+ uint32_t length = current - lastOffset;
+ if (NS_WARN_IF(lastOffset >= mAttributeArray.Length())) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::DispatchCompositionChangeEvent, FAILED due to "
+ "invalid data of mClauseArray or mAttributeArray"));
+ return;
+ }
+ TextRangeType textRangeType =
+ PlatformToNSAttr(mAttributeArray[lastOffset]);
+ rv = dispatcher->AppendClauseToPendingComposition(length, textRangeType);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::DispatchCompositionChangeEvent, FAILED due to"
+ "TextEventDispatcher::AppendClauseToPendingComposition() "
+ "failure"));
+ return;
+ }
+
+ lastOffset = current;
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::DispatchCompositionChangeEvent, index=%u, "
+ "rangeType=%s, range length=%u",
+ i, ToChar(textRangeType), length));
+ }
+ }
+
+ if (mCursorPosition == NO_IME_CARET) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::DispatchCompositionChangeEvent, no caret"));
+ } else {
+ uint32_t cursor = static_cast<uint32_t>(mCursorPosition);
+ if (cursor > mCompositionString.Length()) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::CreateTextRangeArray, mCursorPosition=%d. "
+ "This is larger than mCompositionString.Length()=%zu",
+ mCursorPosition, mCompositionString.Length()));
+ cursor = mCompositionString.Length();
+ }
+
+ // If caret is in the target clause, the target clause will be painted as
+ // normal selection range. Since caret shouldn't be in selection range on
+ // Windows, we shouldn't append caret range in such case.
+ const TextRangeArray* clauses = dispatcher->GetPendingCompositionClauses();
+ const TextRange* targetClause =
+ clauses ? clauses->GetTargetClause() : nullptr;
+ if (targetClause && cursor >= targetClause->mStartOffset &&
+ cursor <= targetClause->mEndOffset) {
+ // Forget the caret position specified by IME since Gecko's caret position
+ // will be at the end of composition string.
+ mCursorPosition = NO_IME_CARET;
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::CreateTextRangeArray, no caret due to it's in "
+ "the target clause, now, mCursorPosition is NO_IME_CARET"));
+ }
+
+ if (mCursorPosition != NO_IME_CARET) {
+ rv = dispatcher->SetCaretInPendingComposition(cursor, 0);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Error,
+ (" IMMHandler::DispatchCompositionChangeEvent, FAILED due to"
+ "TextEventDispatcher::SetCaretInPendingComposition() failure"));
+ return;
+ }
+ }
+ }
+
+ WidgetEventTime eventTime = aWindow->CurrentMessageWidgetEventTime();
+ nsEventStatus status;
+ rv = dispatcher->FlushPendingComposition(status, &eventTime);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::DispatchCompositionChangeEvent, FAILED due to"
+ "TextEventDispatcher::FlushPendingComposition() failure"));
+ return;
+ }
+}
+
+void IMMHandler::GetCompositionString(const IMEContext& aContext, DWORD aIndex,
+ nsAString& aCompositionString) const {
+ aCompositionString.Truncate();
+
+ // Retrieve the size of the required output buffer.
+ long lRtn = ::ImmGetCompositionStringW(aContext.get(), aIndex, nullptr, 0);
+ if (lRtn < 0 || !aCompositionString.SetLength((lRtn / sizeof(WCHAR)) + 1,
+ mozilla::fallible)) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::GetCompositionString, FAILED, due to OOM"));
+ return; // Error or out of memory.
+ }
+
+ // Actually retrieve the composition string information.
+ lRtn = ::ImmGetCompositionStringW(aContext.get(), aIndex,
+ (LPVOID)aCompositionString.BeginWriting(),
+ lRtn + sizeof(WCHAR));
+ aCompositionString.SetLength(lRtn / sizeof(WCHAR));
+
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ ("IMMHandler::GetCompositionString, succeeded, aCompositionString=\"%s\"",
+ NS_ConvertUTF16toUTF8(aCompositionString).get()));
+}
+
+bool IMMHandler::GetTargetClauseRange(uint32_t* aOffset, uint32_t* aLength) {
+ NS_ENSURE_TRUE(aOffset, false);
+ NS_ENSURE_TRUE(mIsComposing, false);
+ NS_ENSURE_TRUE(ShouldDrawCompositionStringOurselves(), false);
+
+ bool found = false;
+ *aOffset = mCompositionStart;
+ for (uint32_t i = 0; i < mAttributeArray.Length(); i++) {
+ if (mAttributeArray[i] == ATTR_TARGET_NOTCONVERTED ||
+ mAttributeArray[i] == ATTR_TARGET_CONVERTED) {
+ *aOffset = mCompositionStart + i;
+ found = true;
+ break;
+ }
+ }
+
+ if (!aLength) {
+ return true;
+ }
+
+ if (!found) {
+ // The all composition string is targetted when there is no ATTR_TARGET_*
+ // clause. E.g., there is only ATTR_INPUT
+ *aLength = mCompositionString.Length();
+ return true;
+ }
+
+ uint32_t offsetInComposition = *aOffset - mCompositionStart;
+ *aLength = mCompositionString.Length() - offsetInComposition;
+ for (uint32_t i = offsetInComposition; i < mAttributeArray.Length(); i++) {
+ if (mAttributeArray[i] != ATTR_TARGET_NOTCONVERTED &&
+ mAttributeArray[i] != ATTR_TARGET_CONVERTED) {
+ *aLength = i - offsetInComposition;
+ break;
+ }
+ }
+ return true;
+}
+
+bool IMMHandler::ConvertToANSIString(const nsString& aStr, UINT aCodePage,
+ nsACString& aANSIStr) {
+ int len = ::WideCharToMultiByte(aCodePage, 0, (LPCWSTR)aStr.get(),
+ aStr.Length(), nullptr, 0, nullptr, nullptr);
+ NS_ENSURE_TRUE(len >= 0, false);
+
+ if (!aANSIStr.SetLength(len, mozilla::fallible)) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::ConvertToANSIString, FAILED, due to OOM"));
+ return false;
+ }
+ ::WideCharToMultiByte(aCodePage, 0, (LPCWSTR)aStr.get(), aStr.Length(),
+ (LPSTR)aANSIStr.BeginWriting(), len, nullptr, nullptr);
+ return true;
+}
+
+bool IMMHandler::GetCharacterRectOfSelectedTextAt(
+ nsWindow* aWindow, uint32_t aOffset, LayoutDeviceIntRect& aCharRect,
+ WritingMode* aWritingMode) {
+ LayoutDeviceIntPoint point(0, 0);
+
+ const Maybe<ContentSelection>& contentSelection =
+ GetContentSelectionWithQueryIfNothing(aWindow);
+ if (contentSelection.isNothing()) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ ("IMMHandler::GetCharacterRectOfSelectedTextAt, FAILED, due to "
+ "Selection::GetContentSelectionWithQueryIfNothing() failure"));
+ return false;
+ }
+
+ // If there is neither a selection range nor composition string, cannot return
+ // character rect, of course.
+ if (!contentSelection->HasRange() && !mIsComposing) {
+ MOZ_LOG(gIMELog, LogLevel::Warning,
+ ("IMMHandler::GetCharacterRectOfSelectedTextAt, FAILED, due to "
+ "there is neither a selection range nor composition string"));
+ return false;
+ }
+
+ // If the offset is larger than the end of composition string or selected
+ // string, we should return false since such case must be a bug of the caller
+ // or the active IME. If it's an IME's bug, we need to set targetLength to
+ // aOffset.
+ const uint32_t targetLength =
+ mIsComposing ? mCompositionString.Length()
+ : contentSelection->OffsetAndDataRef().Length();
+ if (NS_WARN_IF(aOffset > targetLength)) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Error,
+ ("IMMHandler::GetCharacterRectOfSelectedTextAt, FAILED, due to "
+ "aOffset is too large (aOffset=%u, targetLength=%u, mIsComposing=%s)",
+ aOffset, targetLength, GetBoolName(mIsComposing)));
+ return false;
+ }
+
+ // If there is caret, we might be able to use caret rect.
+ uint32_t caretOffset = UINT32_MAX;
+ // There is a caret only when the normal selection is collapsed.
+ if (contentSelection.isNothing() ||
+ contentSelection->OffsetAndDataRef().IsDataEmpty()) {
+ if (mIsComposing) {
+ // If it's composing, mCursorPosition is the offset to caret in
+ // the composition string.
+ if (mCursorPosition != NO_IME_CARET) {
+ MOZ_ASSERT(mCursorPosition >= 0);
+ caretOffset = mCursorPosition;
+ } else if (!ShouldDrawCompositionStringOurselves() ||
+ mCompositionString.IsEmpty()) {
+ // Otherwise, if there is no composition string, we should assume that
+ // there is a caret at the start of composition string.
+ caretOffset = 0;
+ }
+ } else {
+ // If there is no composition, the selection offset is the caret offset.
+ caretOffset = 0;
+ }
+ }
+
+ // If there is a caret and retrieving offset is same as the caret offset,
+ // we should use the caret rect.
+ if (aOffset != caretOffset) {
+ WidgetQueryContentEvent queryTextRectEvent(true, eQueryTextRect, aWindow);
+ WidgetQueryContentEvent::Options options;
+ options.mRelativeToInsertionPoint = true;
+ queryTextRectEvent.InitForQueryTextRect(aOffset, 1, options);
+ aWindow->InitEvent(queryTextRectEvent, &point);
+ DispatchEvent(aWindow, queryTextRectEvent);
+ if (queryTextRectEvent.Succeeded()) {
+ aCharRect = queryTextRectEvent.mReply->mRect;
+ if (aWritingMode) {
+ *aWritingMode = queryTextRectEvent.mReply->WritingModeRef();
+ }
+ MOZ_LOG(
+ gIMELog, LogLevel::Debug,
+ ("IMMHandler::GetCharacterRectOfSelectedTextAt, Succeeded, "
+ "aOffset=%u, aCharRect={ x: %d, y: %d, width: %d, height: %d }, "
+ "queryTextRectEvent={ mReply=%s }",
+ aOffset, aCharRect.X(), aCharRect.Y(), aCharRect.Width(),
+ aCharRect.Height(), ToString(queryTextRectEvent.mReply).c_str()));
+ return true;
+ }
+ }
+
+ return GetCaretRect(aWindow, aCharRect, aWritingMode);
+}
+
+bool IMMHandler::GetCaretRect(nsWindow* aWindow,
+ LayoutDeviceIntRect& aCaretRect,
+ WritingMode* aWritingMode) {
+ LayoutDeviceIntPoint point(0, 0);
+
+ WidgetQueryContentEvent queryCaretRectEvent(true, eQueryCaretRect, aWindow);
+ WidgetQueryContentEvent::Options options;
+ options.mRelativeToInsertionPoint = true;
+ queryCaretRectEvent.InitForQueryCaretRect(0, options);
+ aWindow->InitEvent(queryCaretRectEvent, &point);
+ DispatchEvent(aWindow, queryCaretRectEvent);
+ if (queryCaretRectEvent.Failed()) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ ("IMMHandler::GetCaretRect, FAILED, due to eQueryCaretRect failure"));
+ return false;
+ }
+ aCaretRect = queryCaretRectEvent.mReply->mRect;
+ if (aWritingMode) {
+ *aWritingMode = queryCaretRectEvent.mReply->WritingModeRef();
+ }
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::GetCaretRect, SUCCEEDED, "
+ "aCaretRect={ x: %d, y: %d, width: %d, height: %d }, "
+ "queryCaretRectEvent={ mReply=%s }",
+ aCaretRect.X(), aCaretRect.Y(), aCaretRect.Width(),
+ aCaretRect.Height(), ToString(queryCaretRectEvent.mReply).c_str()));
+ return true;
+}
+
+bool IMMHandler::SetIMERelatedWindowsPos(nsWindow* aWindow,
+ const IMEContext& aContext) {
+ // Get first character rect of current a normal selected text or a composing
+ // string.
+ WritingMode writingMode;
+ LayoutDeviceIntRect firstSelectedCharRectRelativeToWindow;
+ bool ret = GetCharacterRectOfSelectedTextAt(
+ aWindow, 0, firstSelectedCharRectRelativeToWindow, &writingMode);
+ NS_ENSURE_TRUE(ret, false);
+ nsWindow* toplevelWindow = aWindow->GetTopLevelWindow(false);
+ LayoutDeviceIntRect firstSelectedCharRect;
+ ResolveIMECaretPos(toplevelWindow, firstSelectedCharRectRelativeToWindow,
+ aWindow, firstSelectedCharRect);
+
+ // Set native caret size/position to our caret. Some IMEs honor it. E.g.,
+ // "Intelligent ABC" (Simplified Chinese) and "MS PinYin 3.0" (Simplified
+ // Chinese) on XP. But if a11y module is handling native caret, we shouldn't
+ // touch it.
+ if (!IMEHandler::IsA11yHandlingNativeCaret()) {
+ LayoutDeviceIntRect caretRect(firstSelectedCharRect),
+ caretRectRelativeToWindow;
+ if (GetCaretRect(aWindow, caretRectRelativeToWindow)) {
+ ResolveIMECaretPos(toplevelWindow, caretRectRelativeToWindow, aWindow,
+ caretRect);
+ } else {
+ NS_WARNING("failed to get caret rect");
+ caretRect.SetWidth(1);
+ }
+ IMEHandler::CreateNativeCaret(aWindow, caretRect);
+ }
+
+ if (ShouldDrawCompositionStringOurselves()) {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::SetIMERelatedWindowsPos, Set candidate window"));
+
+ // Get a rect of first character in current target in composition string.
+ LayoutDeviceIntRect firstTargetCharRect, lastTargetCharRect;
+ if (mIsComposing && !mCompositionString.IsEmpty()) {
+ // If there are no targetted selection, we should use it's first character
+ // rect instead.
+ uint32_t offset, length;
+ if (!GetTargetClauseRange(&offset, &length)) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::SetIMERelatedWindowsPos, FAILED, due to "
+ "GetTargetClauseRange() failure"));
+ return false;
+ }
+ ret =
+ GetCharacterRectOfSelectedTextAt(aWindow, offset - mCompositionStart,
+ firstTargetCharRect, &writingMode);
+ NS_ENSURE_TRUE(ret, false);
+ if (length) {
+ ret = GetCharacterRectOfSelectedTextAt(
+ aWindow, offset + length - 1 - mCompositionStart,
+ lastTargetCharRect);
+ NS_ENSURE_TRUE(ret, false);
+ } else {
+ lastTargetCharRect = firstTargetCharRect;
+ }
+ } else {
+ // If there are no composition string, we should use a first character
+ // rect.
+ ret = GetCharacterRectOfSelectedTextAt(aWindow, 0, firstTargetCharRect,
+ &writingMode);
+ NS_ENSURE_TRUE(ret, false);
+ lastTargetCharRect = firstTargetCharRect;
+ }
+ ResolveIMECaretPos(toplevelWindow, firstTargetCharRect, aWindow,
+ firstTargetCharRect);
+ ResolveIMECaretPos(toplevelWindow, lastTargetCharRect, aWindow,
+ lastTargetCharRect);
+ LayoutDeviceIntRect targetClauseRect;
+ targetClauseRect.UnionRect(firstTargetCharRect, lastTargetCharRect);
+
+ // Move the candidate window to proper position from the target clause as
+ // far as possible.
+ CANDIDATEFORM candForm;
+ candForm.dwIndex = 0;
+ if (!writingMode.IsVertical() || IsVerticalWritingSupported()) {
+ candForm.dwStyle = CFS_EXCLUDE;
+ // Candidate window shouldn't overlap the target clause in any writing
+ // mode.
+ candForm.rcArea.left = targetClauseRect.X();
+ candForm.rcArea.right = targetClauseRect.XMost();
+ candForm.rcArea.top = targetClauseRect.Y();
+ candForm.rcArea.bottom = targetClauseRect.YMost();
+ if (!writingMode.IsVertical()) {
+ // In horizontal layout, current point of interest should be top-left
+ // of the first character.
+ candForm.ptCurrentPos.x = firstTargetCharRect.X();
+ candForm.ptCurrentPos.y = firstTargetCharRect.Y();
+ } else if (writingMode.IsVerticalRL()) {
+ // In vertical layout (RL), candidate window should be positioned right
+ // side of target clause. However, we don't set vertical writing font
+ // to the IME. Therefore, the candidate window may be positioned
+ // bottom-left of target clause rect with these information.
+ candForm.ptCurrentPos.x = targetClauseRect.X();
+ candForm.ptCurrentPos.y = targetClauseRect.Y();
+ } else {
+ MOZ_ASSERT(writingMode.IsVerticalLR(), "Did we miss some causes?");
+ // In vertical layout (LR), candidate window should be poisitioned left
+ // side of target clause. Although, we don't set vertical writing font
+ // to the IME, the candidate window may be positioned bottom-right of
+ // the target clause rect with these information.
+ candForm.ptCurrentPos.x = targetClauseRect.XMost();
+ candForm.ptCurrentPos.y = targetClauseRect.Y();
+ }
+ } else {
+ // If vertical writing is not supported by IME, let's set candidate
+ // window position to the bottom-left of the target clause because
+ // the position must be the safest position to prevent the candidate
+ // window to overlap with the target clause.
+ candForm.dwStyle = CFS_CANDIDATEPOS;
+ candForm.ptCurrentPos.x = targetClauseRect.X();
+ candForm.ptCurrentPos.y = targetClauseRect.YMost();
+ }
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::SetIMERelatedWindowsPos, Calling "
+ "ImmSetCandidateWindow()... ptCurrentPos={ x=%ld, y=%ld }, "
+ "rcArea={ left=%ld, top=%ld, right=%ld, bottom=%ld }, "
+ "writingMode=%s",
+ candForm.ptCurrentPos.x, candForm.ptCurrentPos.y,
+ candForm.rcArea.left, candForm.rcArea.top, candForm.rcArea.right,
+ candForm.rcArea.bottom, ToString(writingMode).c_str()));
+ ::ImmSetCandidateWindow(aContext.get(), &candForm);
+ } else {
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::SetIMERelatedWindowsPos, Set composition window"));
+
+ // Move the composition window to caret position (if selected some
+ // characters, we should use first character rect of them).
+ // And in this mode, IME adjusts the candidate window position
+ // automatically. So, we don't need to set it.
+ COMPOSITIONFORM compForm;
+ compForm.dwStyle = CFS_POINT;
+ compForm.ptCurrentPos.x = !writingMode.IsVerticalLR()
+ ? firstSelectedCharRect.X()
+ : firstSelectedCharRect.XMost();
+ compForm.ptCurrentPos.y = firstSelectedCharRect.Y();
+ ::ImmSetCompositionWindow(aContext.get(), &compForm);
+ }
+
+ return true;
+}
+
+void IMMHandler::ResolveIMECaretPos(nsIWidget* aReferenceWidget,
+ LayoutDeviceIntRect& aCursorRect,
+ nsIWidget* aNewOriginWidget,
+ LayoutDeviceIntRect& aOutRect) {
+ aOutRect = aCursorRect;
+
+ if (aReferenceWidget == aNewOriginWidget) return;
+
+ if (aReferenceWidget)
+ aOutRect.MoveBy(aReferenceWidget->WidgetToScreenOffset());
+
+ if (aNewOriginWidget)
+ aOutRect.MoveBy(-aNewOriginWidget->WidgetToScreenOffset());
+}
+
+static void SetHorizontalFontToLogFont(const nsAString& aFontFace,
+ LOGFONTW& aLogFont) {
+ aLogFont.lfEscapement = aLogFont.lfOrientation = 0;
+ if (NS_WARN_IF(aFontFace.Length() > LF_FACESIZE - 1)) {
+ memcpy(aLogFont.lfFaceName, L"System", sizeof(L"System"));
+ return;
+ }
+ memcpy(aLogFont.lfFaceName, aFontFace.BeginReading(),
+ aFontFace.Length() * sizeof(wchar_t));
+ aLogFont.lfFaceName[aFontFace.Length()] = 0;
+}
+
+static void SetVerticalFontToLogFont(const nsAString& aFontFace,
+ LOGFONTW& aLogFont) {
+ aLogFont.lfEscapement = aLogFont.lfOrientation = 2700;
+ if (NS_WARN_IF(aFontFace.Length() > LF_FACESIZE - 2)) {
+ memcpy(aLogFont.lfFaceName, L"@System", sizeof(L"@System"));
+ return;
+ }
+ aLogFont.lfFaceName[0] = '@';
+ memcpy(&aLogFont.lfFaceName[1], aFontFace.BeginReading(),
+ aFontFace.Length() * sizeof(wchar_t));
+ aLogFont.lfFaceName[aFontFace.Length() + 1] = 0;
+}
+
+void IMMHandler::AdjustCompositionFont(nsWindow* aWindow,
+ const IMEContext& aContext,
+ const WritingMode& aWritingMode,
+ bool aForceUpdate) {
+ // An instance of IMMHandler is destroyed when active IME is changed.
+ // Therefore, we need to store the information which are set to the IM
+ // context to static variables since IM context is never recreated.
+ static bool sCompositionFontsInitialized = false;
+ static nsString sCompositionFont;
+ static bool sCompositionFontPrefDone = false;
+ if (!sCompositionFontPrefDone) {
+ sCompositionFontPrefDone = true;
+ Preferences::GetString("intl.imm.composition_font", sCompositionFont);
+ }
+
+ // If composition font is customized by pref, we need to modify the
+ // composition font of the IME context at first time even if the writing mode
+ // is horizontal.
+ bool setCompositionFontForcibly =
+ aForceUpdate ||
+ (!sCompositionFontsInitialized && !sCompositionFont.IsEmpty());
+
+ static WritingMode sCurrentWritingMode;
+ static nsString sCurrentIMEName;
+ if (!setCompositionFontForcibly &&
+ sWritingModeOfCompositionFont == aWritingMode &&
+ sCurrentIMEName == sIMEName) {
+ // Nothing to do if writing mode isn't being changed.
+ return;
+ }
+
+ // Decide composition fonts for both horizontal writing mode and vertical
+ // writing mode. If the font isn't specified by the pref, use default
+ // font which is already set to the IM context. And also in vertical writing
+ // mode, insert '@' to the start of the font.
+ if (!sCompositionFontsInitialized) {
+ sCompositionFontsInitialized = true;
+ // sCompositionFontH must not start with '@' and its length is less than
+ // LF_FACESIZE since it needs to end with null terminating character.
+ if (sCompositionFont.IsEmpty() ||
+ sCompositionFont.Length() > LF_FACESIZE - 1 ||
+ sCompositionFont[0] == '@') {
+ LOGFONTW defaultLogFont;
+ if (NS_WARN_IF(
+ !::ImmGetCompositionFont(aContext.get(), &defaultLogFont))) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Error,
+ (" IMMHandler::AdjustCompositionFont, ::ImmGetCompositionFont() "
+ "failed"));
+ sCompositionFont.AssignLiteral("System");
+ } else {
+ // The font face is typically, "System".
+ sCompositionFont.Assign(defaultLogFont.lfFaceName);
+ }
+ }
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ (" IMMHandler::AdjustCompositionFont, sCompositionFont=\"%s\" is "
+ "initialized",
+ NS_ConvertUTF16toUTF8(sCompositionFont).get()));
+ }
+
+ static nsString sCompositionFontForJapanist2003;
+ if (IsJapanist2003Active() && sCompositionFontForJapanist2003.IsEmpty()) {
+ const char* kCompositionFontForJapanist2003 =
+ "intl.imm.composition_font.japanist_2003";
+ Preferences::GetString(kCompositionFontForJapanist2003,
+ sCompositionFontForJapanist2003);
+ // If the font name is not specified properly, let's use
+ // "MS PGothic" instead.
+ if (sCompositionFontForJapanist2003.IsEmpty() ||
+ sCompositionFontForJapanist2003.Length() > LF_FACESIZE - 2 ||
+ sCompositionFontForJapanist2003[0] == '@') {
+ sCompositionFontForJapanist2003.AssignLiteral("MS PGothic");
+ }
+ }
+
+ sWritingModeOfCompositionFont = aWritingMode;
+ sCurrentIMEName = sIMEName;
+
+ LOGFONTW logFont;
+ memset(&logFont, 0, sizeof(logFont));
+ if (!::ImmGetCompositionFont(aContext.get(), &logFont)) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::AdjustCompositionFont, ::ImmGetCompositionFont() "
+ "failed"));
+ logFont.lfFaceName[0] = 0;
+ }
+ // Need to reset some information which should be recomputed with new font.
+ logFont.lfWidth = 0;
+ logFont.lfWeight = FW_DONTCARE;
+ logFont.lfOutPrecision = OUT_DEFAULT_PRECIS;
+ logFont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
+ logFont.lfPitchAndFamily = DEFAULT_PITCH;
+
+ if (aWritingMode.IsVertical() && IsVerticalWritingSupported()) {
+ SetVerticalFontToLogFont(IsJapanist2003Active()
+ ? sCompositionFontForJapanist2003
+ : sCompositionFont,
+ logFont);
+ } else {
+ SetHorizontalFontToLogFont(IsJapanist2003Active()
+ ? sCompositionFontForJapanist2003
+ : sCompositionFont,
+ logFont);
+ }
+ MOZ_LOG(gIMELog, LogLevel::Warning,
+ (" IMMHandler::AdjustCompositionFont, calling "
+ "::ImmSetCompositionFont(\"%s\")",
+ NS_ConvertUTF16toUTF8(nsDependentString(logFont.lfFaceName)).get()));
+ ::ImmSetCompositionFontW(aContext.get(), &logFont);
+}
+
+// static
+nsresult IMMHandler::OnMouseButtonEvent(
+ nsWindow* aWindow, const IMENotification& aIMENotification) {
+ // We don't need to create the instance of the handler here.
+ if (!gIMMHandler) {
+ return NS_OK;
+ }
+
+ if (!sWM_MSIME_MOUSE || !IsComposingOnOurEditor() ||
+ !ShouldDrawCompositionStringOurselves()) {
+ return NS_OK;
+ }
+
+ // We need to handle only mousedown event.
+ if (aIMENotification.mMouseButtonEventData.mEventMessage != eMouseDown) {
+ return NS_OK;
+ }
+
+ // If the character under the cursor is not in the composition string,
+ // we don't need to notify IME of it.
+ uint32_t compositionStart = gIMMHandler->mCompositionStart;
+ uint32_t compositionEnd =
+ compositionStart + gIMMHandler->mCompositionString.Length();
+ if (aIMENotification.mMouseButtonEventData.mOffset < compositionStart ||
+ aIMENotification.mMouseButtonEventData.mOffset >= compositionEnd) {
+ return NS_OK;
+ }
+
+ BYTE button;
+ switch (aIMENotification.mMouseButtonEventData.mButton) {
+ case MouseButton::ePrimary:
+ button = IMEMOUSE_LDOWN;
+ break;
+ case MouseButton::eMiddle:
+ button = IMEMOUSE_MDOWN;
+ break;
+ case MouseButton::eSecondary:
+ button = IMEMOUSE_RDOWN;
+ break;
+ default:
+ return NS_OK;
+ }
+
+ // calcurate positioning and offset
+ // char : JCH1|JCH2|JCH3
+ // offset: 0011 1122 2233
+ // positioning: 2301 2301 2301
+ LayoutDeviceIntPoint cursorPos =
+ aIMENotification.mMouseButtonEventData.mCursorPos;
+ LayoutDeviceIntRect charRect =
+ aIMENotification.mMouseButtonEventData.mCharRect;
+ int32_t cursorXInChar = cursorPos.x - charRect.X();
+ // The event might hit to zero-width character, see bug 694913.
+ // The reason might be:
+ // * There are some zero-width characters are actually.
+ // * font-size is specified zero.
+ // But nobody reproduced this bug actually...
+ // We should assume that user clicked on right most of the zero-width
+ // character in such case.
+ int positioning = 1;
+ if (charRect.Width() > 0) {
+ positioning = cursorXInChar * 4 / charRect.Width();
+ positioning = (positioning + 2) % 4;
+ }
+
+ int offset =
+ aIMENotification.mMouseButtonEventData.mOffset - compositionStart;
+ if (positioning < 2) {
+ offset++;
+ }
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::OnMouseButtonEvent, x,y=%d,%d, offset=%d, "
+ "positioning=%d",
+ cursorPos.x.value, cursorPos.y.value, offset, positioning));
+
+ // send MS_MSIME_MOUSE message to default IME window.
+ HWND imeWnd = ::ImmGetDefaultIMEWnd(aWindow->GetWindowHandle());
+ IMEContext context(aWindow);
+ if (::SendMessageW(imeWnd, sWM_MSIME_MOUSE,
+ MAKELONG(MAKEWORD(button, positioning), offset),
+ (LPARAM)context.get()) == 1) {
+ return NS_SUCCESS_EVENT_CONSUMED;
+ }
+ return NS_OK;
+}
+
+// static
+bool IMMHandler::OnKeyDownEvent(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
+ MSGResult& aResult) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Info,
+ ("IMMHandler::OnKeyDownEvent, hWnd=%p, wParam=%08zx, lParam=%08" PRIxLPTR,
+ aWindow->GetWindowHandle(), wParam, lParam));
+ aResult.mConsumed = false;
+ switch (wParam) {
+ case VK_TAB:
+ case VK_PRIOR:
+ case VK_NEXT:
+ case VK_END:
+ case VK_HOME:
+ case VK_LEFT:
+ case VK_UP:
+ case VK_RIGHT:
+ case VK_DOWN:
+ case VK_RETURN:
+ // If IME didn't process the key message (the virtual key code wasn't
+ // converted to VK_PROCESSKEY), and the virtual key code event causes
+ // moving caret or editing text with keeping composing state, we should
+ // cancel the composition here because we cannot support moving
+ // composition string with DOM events (IE also cancels the composition
+ // in same cases). Then, this event will be dispatched.
+ if (IsComposingOnOurEditor()) {
+ // NOTE: We don't need to cancel the composition on another window.
+ CancelComposition(aWindow, false);
+ }
+ return false;
+ default:
+ return false;
+ }
+}
+
+Maybe<ContentSelection> IMMHandler::QueryContentSelection(nsWindow* aWindow) {
+ WidgetQueryContentEvent querySelectedTextEvent(true, eQuerySelectedText,
+ aWindow);
+ LayoutDeviceIntPoint point(0, 0);
+ aWindow->InitEvent(querySelectedTextEvent, &point);
+ DispatchEvent(aWindow, querySelectedTextEvent);
+ if (NS_WARN_IF(querySelectedTextEvent.Failed())) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::Selection::Init, FAILED, due to eQuerySelectedText "
+ "failure"));
+ return Nothing();
+ }
+ // If the window is destroyed during querying selected text, we shouldn't
+ // do anymore.
+ if (aWindow->Destroyed()) {
+ MOZ_LOG(
+ gIMELog, LogLevel::Error,
+ (" IMMHandler::Selection::Init, FAILED, due to the widget destroyed"));
+ return Nothing();
+ }
+
+ ContentSelection contentSelection(querySelectedTextEvent);
+
+ MOZ_LOG(gIMELog, LogLevel::Info,
+ ("IMMHandler::Selection::Init, querySelectedTextEvent={ mReply=%s }",
+ ToString(querySelectedTextEvent.mReply).c_str()));
+
+ if (contentSelection.HasRange() &&
+ !contentSelection.OffsetAndDataRef().IsValid()) {
+ MOZ_LOG(gIMELog, LogLevel::Error,
+ (" IMMHandler::Selection::Init, FAILED, due to invalid range"));
+ return Nothing();
+ }
+ return Some(contentSelection);
+}
+
+} // namespace widget
+} // namespace mozilla