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gecko-dev/widget/windows/IMMHandler.cpp

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/* -*- 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 "WinUtils.h"
#include "KeyboardLayout.h"
#include <algorithm>
#include "mozilla/CheckedInt.h"
#include "mozilla/MiscEvents.h"
#include "mozilla/TextEvents.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
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:
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:
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 GetWritingModeName : public nsAutoCString
{
public:
GetWritingModeName(const WritingMode& aWritingMode)
{
if (!aWritingMode.IsVertical()) {
Assign("Horizontal");
return;
}
if (aWritingMode.IsVerticalLR()) {
Assign("Vertical (LR)");
return;
}
Assign("Vertical (RL)");
}
virtual ~GetWritingModeName() {}
};
class GetReconvertStringLog : public nsAutoCString
{
public:
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;
LazyLogModule gIMMLog("nsIMM32HandlerWidgets");
/******************************************************************************
* IMEContext
******************************************************************************/
IMEContext::IMEContext(HWND aWnd)
: mWnd(aWnd)
, mIMC(::ImmGetContext(aWnd))
{
}
IMEContext::IMEContext(nsWindow* aWindow)
: mWnd(aWindow->GetWindowHandle())
, mIMC(::ImmGetContext(aWindow->GetWindowHandle()))
{
}
void
IMEContext::Init(HWND aWnd)
{
Clear();
mWnd = aWnd;
mIMC = ::ImmGetContext(mWnd);
}
void
IMEContext::Init(nsWindow* aWindow)
{
Init(aWindow->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;
bool IMMHandler::sNativeCaretIsCreatedForPlugin = 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::IsComposingOnPlugin()
{
return gIMMHandler && gIMMHandler->mIsComposingOnPlugin;
}
// 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::IsJapanist2003Active()
{
return sIMEName.EqualsLiteral("Japanist 2003");
}
// static
bool
IMMHandler::IsGoogleJapaneseInputActive()
{
// NOTE: Even on Windows for en-US, the name of Google Japanese Input is
// written in Japanese.
return sIMEName.Equals(L"Google \x65E5\x672C\x8A9E\x5165\x529B "
L"IMM32 \x30E2\x30B8\x30E5\x30FC\x30EB");
}
// 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, wwc(sIMEName.BeginWriting()),
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()) {
sIMEName =
Preferences::GetString("intl.imm.japanese.assume_active_tip_name_as");
}
// 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(gIMMLog, LogLevel::Info,
("InitKeyboardLayout, aKeyboardLayout=%08x (\"%s\"), sCodePage=%lu, "
"sIMEProperty=%s, sIMEUIProperty=%s",
aKeyboardLayout, NS_ConvertUTF16toUTF8(sIMEName).get(),
sCodePage, GetIMEGeneralPropertyName(sIMEProperty).get(),
GetIMEUIPropertyName(sIMEUIProperty).get()));
}
// static
UINT
IMMHandler::GetKeyboardCodePage()
{
return sCodePage;
}
// static
nsIMEUpdatePreference
IMMHandler::GetIMEUpdatePreference()
{
return nsIMEUpdatePreference(
nsIMEUpdatePreference::NOTIFY_POSITION_CHANGE |
nsIMEUpdatePreference::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)
, mIsComposingOnPlugin(false)
, mNativeCaretIsCreated(false)
{
MOZ_LOG(gIMMLog, LogLevel::Debug, ("IMMHandler is created"));
}
IMMHandler::~IMMHandler()
{
if (mIsComposing) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("~IMMHandler, ERROR, the instance is still composing"));
}
MOZ_LOG(gIMMLog, LogLevel::Debug, ("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(gIMMLog, LogLevel::Info,
("CommitComposition, aForce=%s, aWindow=%p, hWnd=%08x, "
"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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("CancelComposition, aForce=%s, aWindow=%p, hWnd=%08x, "
"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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("OnFocusChange(aFocus=%s, aWindow=%p), sHasFocus=%s, "
"IsComposingWindow(aWindow)=%s, aWindow->Destroyed()=%s, "
"sNativeCaretIsCreatedForPlugin=%s",
GetBoolName(aFocus), aWindow, GetBoolName(sHasFocus),
GetBoolName(IsComposingWindow(aWindow)),
GetBoolName(aWindow->Destroyed()),
GetBoolName(sNativeCaretIsCreatedForPlugin)));
if (!aFocus) {
if (sNativeCaretIsCreatedForPlugin) {
::DestroyCaret();
sNativeCaretIsCreatedForPlugin = false;
}
if (IsComposingWindow(aWindow) && aWindow->Destroyed()) {
CancelComposition(aWindow);
}
}
if (gIMMHandler) {
gIMMHandler->mSelection.Clear();
}
sHasFocus = aFocus;
}
// static
void
IMMHandler::OnUpdateComposition(nsWindow* aWindow)
{
if (!gIMMHandler) {
return;
}
if (aWindow->PluginHasFocus()) {
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->mSelection.Update(aIMENotification);
}
}
// 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.
// When a plug-in has focus, we should dispatch the IME events to
// the plug-in at first.
if (aWindow->PluginHasFocus()) {
bool ret = false;
if (ProcessMessageForPlugin(aWindow, msg, wParam, lParam, ret, aResult)) {
return ret;
}
}
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;
};
}
// static
bool
IMMHandler::ProcessMessageForPlugin(nsWindow* aWindow,
UINT msg,
WPARAM& wParam,
LPARAM& lParam,
bool& aRet,
MSGResult& aResult)
{
aResult.mResult = 0;
aResult.mConsumed = false;
switch (msg) {
case WM_INPUTLANGCHANGEREQUEST:
case WM_INPUTLANGCHANGE:
aWindow->DispatchPluginEvent(msg, wParam, lParam, false);
aRet = ProcessInputLangChangeMessage(aWindow, wParam, lParam, aResult);
return true;
case WM_IME_CHAR:
EnsureHandlerInstance();
aRet = gIMMHandler->OnIMECharOnPlugin(aWindow, wParam, lParam, aResult);
return true;
case WM_IME_SETCONTEXT:
aRet = OnIMESetContextOnPlugin(aWindow, wParam, lParam, aResult);
return true;
case WM_CHAR:
if (!gIMMHandler) {
return true;
}
aRet = gIMMHandler->OnCharOnPlugin(aWindow, wParam, lParam, aResult);
return true;
case WM_IME_COMPOSITIONFULL:
case WM_IME_CONTROL:
case WM_IME_KEYDOWN:
case WM_IME_KEYUP:
case WM_IME_SELECT:
aResult.mConsumed =
aWindow->DispatchPluginEvent(msg, wParam, lParam, false);
aRet = true;
return true;
case WM_IME_REQUEST:
// Our plugin implementation is alwasy OOP. So WM_IME_REQUEST doesn't
// allow that parameter is pointer and shouldn't handle into Gecko.
aRet = false;
return true;
}
return false;
}
/****************************************************************************
* message handlers
****************************************************************************/
void
IMMHandler::OnInputLangChange(nsWindow* aWindow,
WPARAM wParam,
LPARAM lParam,
MSGResult& aResult)
{
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnInputLangChange, hWnd=%08x, wParam=%08x, lParam=%08x",
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(gIMMLog, LogLevel::Info,
("OnIMEStartComposition, hWnd=%08x, 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(gIMMLog, LogLevel::Info,
("OnIMEComposition, hWnd=%08x, lParam=%08x, 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(gIMMLog, LogLevel::Info,
("OnIMEEndComposition, hWnd=%08x, 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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("OnIMEChar, hWnd=%08x, char=%08x",
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(gIMMLog, LogLevel::Info,
("OnIMECompositionFull, hWnd=%08x",
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(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_CHANGECANDIDATE, lParam=%08x",
aWindow->GetWindowHandle(), lParam));
break;
case IMN_CLOSECANDIDATE:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_CLOSECANDIDATE, lParam=%08x",
aWindow->GetWindowHandle(), lParam));
break;
case IMN_CLOSESTATUSWINDOW:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_CLOSESTATUSWINDOW",
aWindow->GetWindowHandle()));
break;
case IMN_GUIDELINE:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_GUIDELINE",
aWindow->GetWindowHandle()));
break;
case IMN_OPENCANDIDATE:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_OPENCANDIDATE, lParam=%08x",
aWindow->GetWindowHandle(), lParam));
break;
case IMN_OPENSTATUSWINDOW:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_OPENSTATUSWINDOW",
aWindow->GetWindowHandle()));
break;
case IMN_SETCANDIDATEPOS:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_SETCANDIDATEPOS, lParam=%08x",
aWindow->GetWindowHandle(), lParam));
break;
case IMN_SETCOMPOSITIONFONT:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_SETCOMPOSITIONFONT",
aWindow->GetWindowHandle()));
break;
case IMN_SETCOMPOSITIONWINDOW:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_SETCOMPOSITIONWINDOW",
aWindow->GetWindowHandle()));
break;
case IMN_SETCONVERSIONMODE:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_SETCONVERSIONMODE",
aWindow->GetWindowHandle()));
break;
case IMN_SETOPENSTATUS:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_SETOPENSTATUS",
aWindow->GetWindowHandle()));
break;
case IMN_SETSENTENCEMODE:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_SETSENTENCEMODE",
aWindow->GetWindowHandle()));
break;
case IMN_SETSTATUSWINDOWPOS:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, IMN_SETSTATUSWINDOWPOS",
aWindow->GetWindowHandle()));
break;
case IMN_PRIVATE:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMENotify, hWnd=%08x, 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(gIMMLog, LogLevel::Info,
("OnIMERequest, hWnd=%08x, IMR_RECONVERTSTRING",
aWindow->GetWindowHandle()));
aResult.mConsumed = HandleReconvert(aWindow, lParam, &aResult.mResult);
return true;
case IMR_QUERYCHARPOSITION:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMERequest, hWnd=%08x, IMR_QUERYCHARPOSITION",
aWindow->GetWindowHandle()));
aResult.mConsumed =
HandleQueryCharPosition(aWindow, lParam, &aResult.mResult);
return true;
case IMR_DOCUMENTFEED:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMERequest, hWnd=%08x, IMR_DOCUMENTFEED",
aWindow->GetWindowHandle()));
aResult.mConsumed = HandleDocumentFeed(aWindow, lParam, &aResult.mResult);
return true;
default:
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMERequest, hWnd=%08x, wParam=%08x",
aWindow->GetWindowHandle(), wParam));
aResult.mConsumed = false;
return true;
}
}
// static
bool
IMMHandler::OnIMESelect(nsWindow* aWindow,
WPARAM wParam,
LPARAM lParam,
MSGResult& aResult)
{
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMESelect, hWnd=%08x, wParam=%08x, lParam=%08x",
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(gIMMLog, LogLevel::Info,
("OnIMESetContext, hWnd=%08x, %s, lParam=%08x",
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(gIMMLog, LogLevel::Info,
("OnIMESetContext, hWnd=%08x is top level window"));
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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("OnChar, aWindow=%p, wParam=%08x, lParam=%08x, "
"recorded: wParam=%08x, lParam=%08x",
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;
}
/****************************************************************************
* message handlers for plug-in
****************************************************************************/
void
IMMHandler::OnIMEStartCompositionOnPlugin(nsWindow* aWindow,
WPARAM wParam,
LPARAM lParam)
{
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMEStartCompositionOnPlugin, hWnd=%08x, mIsComposingOnPlugin=%s",
aWindow->GetWindowHandle(), GetBoolName(mIsComposingOnPlugin)));
mIsComposingOnPlugin = true;
mDispatcher = GetTextEventDispatcherFor(aWindow);
mComposingWindow = aWindow;
IMEContext context(aWindow);
SetIMERelatedWindowsPosOnPlugin(aWindow, context);
// On widnowless plugin, we should assume that the focused editor is always
// in horizontal writing mode.
AdjustCompositionFont(aWindow, context, WritingMode());
}
void
IMMHandler::OnIMECompositionOnPlugin(nsWindow* aWindow,
WPARAM wParam,
LPARAM lParam)
{
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMECompositionOnPlugin, hWnd=%08x, lParam=%08x, "
"mIsComposingOnPlugin=%s, GCS_RESULTSTR=%s, GCS_COMPSTR=%s, "
"GCS_COMPATTR=%s, GCS_COMPCLAUSE=%s, GCS_CURSORPOS=%s",
aWindow->GetWindowHandle(), lParam, GetBoolName(mIsComposingOnPlugin),
GetBoolName(lParam & GCS_RESULTSTR), GetBoolName(lParam & GCS_COMPSTR),
GetBoolName(lParam & GCS_COMPATTR), GetBoolName(lParam & GCS_COMPCLAUSE),
GetBoolName(lParam & GCS_CURSORPOS)));
// We should end composition if there is a committed string.
if (IS_COMMITTING_LPARAM(lParam)) {
mIsComposingOnPlugin = false;
mComposingWindow = nullptr;
mDispatcher = nullptr;
return;
}
// Continue composition if there is still a string being composed.
if (IS_COMPOSING_LPARAM(lParam)) {
mIsComposingOnPlugin = true;
mDispatcher = GetTextEventDispatcherFor(aWindow);
mComposingWindow = aWindow;
IMEContext context(aWindow);
SetIMERelatedWindowsPosOnPlugin(aWindow, context);
}
}
void
IMMHandler::OnIMEEndCompositionOnPlugin(nsWindow* aWindow,
WPARAM wParam,
LPARAM lParam)
{
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMEEndCompositionOnPlugin, hWnd=%08x, mIsComposingOnPlugin=%s",
aWindow->GetWindowHandle(), GetBoolName(mIsComposingOnPlugin)));
mIsComposingOnPlugin = false;
mComposingWindow = nullptr;
mDispatcher = nullptr;
if (mNativeCaretIsCreated) {
::DestroyCaret();
mNativeCaretIsCreated = false;
}
}
bool
IMMHandler::OnIMECharOnPlugin(nsWindow* aWindow,
WPARAM wParam,
LPARAM lParam,
MSGResult& aResult)
{
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMECharOnPlugin, hWnd=%08x, char=%08x, scancode=%08x",
aWindow->GetWindowHandle(), wParam, lParam));
aResult.mConsumed =
aWindow->DispatchPluginEvent(WM_IME_CHAR, wParam, lParam, true);
if (!aResult.mConsumed) {
// Record the WM_CHAR messages which are going to be coming.
EnsureHandlerInstance();
EnqueueIMECharRecords(wParam, lParam);
}
return true;
}
// static
bool
IMMHandler::OnIMESetContextOnPlugin(nsWindow* aWindow,
WPARAM wParam,
LPARAM lParam,
MSGResult& aResult)
{
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnIMESetContextOnPlugin, hWnd=%08x, %s, lParam=%08x",
aWindow->GetWindowHandle(), wParam ? "Active" : "Deactive", lParam));
// If the IME context becomes active on a plug-in, we should commit
// our composition. And also we should cancel the composition on new
// window. Note that if IsTopLevelWindowOfComposition(aWindow) returns
// true, we should ignore the message here, see the comment in
// OnIMESetContext() for the detail.
if (wParam && gIMMHandler && !IsTopLevelWindowOfComposition(aWindow)) {
if (gIMMHandler->CommitCompositionOnPreviousWindow(aWindow)) {
CancelComposition(aWindow);
}
}
// Dispatch message to the plug-in.
// XXX When a windowless plug-in gets focus, we should send
// WM_IME_SETCONTEXT
aWindow->DispatchPluginEvent(WM_IME_SETCONTEXT, wParam, lParam, false);
// We should send WM_IME_SETCONTEXT to the DefWndProc here. It shouldn't
// be received on ancestor windows, see OnIMESetContext() for the detail.
aResult.mResult = ::DefWindowProc(aWindow->GetWindowHandle(),
WM_IME_SETCONTEXT, wParam, lParam);
// Don't synchronously dispatch the pending events when we receive
// WM_IME_SETCONTEXT because we get it during plugin destruction.
// (bug 491848)
aResult.mConsumed = true;
return true;
}
bool
IMMHandler::OnCharOnPlugin(nsWindow* aWindow,
WPARAM wParam,
LPARAM lParam,
MSGResult& aResult)
{
NS_WARNING("OnCharOnPlugin");
if (mIsComposing) {
aWindow->NotifyIME(REQUEST_TO_COMMIT_COMPOSITION);
return true;
}
// We should never consume char message on windowless plugin.
aResult.mConsumed = false;
if (IsIMECharRecordsEmpty()) {
return false;
}
WPARAM recWParam;
LPARAM recLParam;
DequeueIMECharRecords(recWParam, recLParam);
MOZ_LOG(gIMMLog, LogLevel::Info,
("OnCharOnPlugin, aWindow=%p, wParam=%08x, lParam=%08x, "
"recorded: wParam=%08x, lParam=%08x",
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();
}
// WM_CHAR on plug-in is always handled by nsWindow.
return false;
}
/****************************************************************************
* others
****************************************************************************/
TextEventDispatcher*
IMMHandler::GetTextEventDispatcherFor(nsWindow* aWindow)
{
return aWindow == mComposingWindow && mDispatcher ?
mDispatcher.get() : aWindow->GetTextEventDispatcher();
}
void
IMMHandler::HandleStartComposition(nsWindow* aWindow,
const IMEContext& aContext)
{
NS_PRECONDITION(!mIsComposing,
"HandleStartComposition is called but mIsComposing is TRUE");
Selection& selection = GetSelection();
if (!selection.EnsureValidSelection(aWindow)) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleStartComposition, FAILED, due to "
"Selection::EnsureValidSelection() failure"));
return;
}
AdjustCompositionFont(aWindow, aContext, selection.mWritingMode);
mCompositionStart = selection.mOffset;
mCursorPosition = NO_IME_CARET;
RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcherFor(aWindow);
nsresult rv = dispatcher->BeginNativeInputTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("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(gIMMLog, LogLevel::Error,
("HandleStartComposition, FAILED, due to "
"TextEventDispatcher::StartComposition() failure"));
return;
}
mIsComposing = true;
mComposingWindow = aWindow;
mDispatcher = dispatcher;
MOZ_LOG(gIMMLog, LogLevel::Info,
("HandleStartComposition, START composition, mCompositionStart=%ld",
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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("HandleComposition, GCS_COMPSTR"));
nsAutoString previousCompositionString(mCompositionString);
GetCompositionString(aContext, GCS_COMPSTR, mCompositionString);
if (!IS_COMPOSING_LPARAM(lParam)) {
MOZ_LOG(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("HandleComposition, GCS_COMPCLAUSE, clauseArrayLength=%ld but "
"clauseArrayLength2=%ld",
clauseArrayLength, clauseArrayLength2));
if (clauseArrayLength > clauseArrayLength2)
clauseArrayLength = clauseArrayLength2;
}
if (useA_API) {
// 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[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(gIMMLog, LogLevel::Info,
("HandleComposition, GCS_COMPCLAUSE, mClauseLength=%ld",
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(gIMMLog, LogLevel::Info,
("HandleComposition, GCS_COMPATTR, mAttributeLength=%ld",
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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("HandleEndComposition(aWindow=0x%p, aCommitString=0x%p (\"%s\"))",
aWindow, aCommitString,
aCommitString ? NS_ConvertUTF16toUTF8(*aCommitString).get() : ""));
if (mNativeCaretIsCreated) {
::DestroyCaret();
mNativeCaretIsCreated = false;
}
RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcherFor(aWindow);
nsresult rv = dispatcher->BeginNativeInputTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("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(gIMMLog, LogLevel::Error,
("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);
Selection& selection = GetSelection();
if (!selection.EnsureValidSelection(aWindow)) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleReconvert, FAILED, due to "
"Selection::EnsureValidSelection() failure"));
return false;
}
uint32_t len = selection.Length();
uint32_t needSize = sizeof(RECONVERTSTRING) + len * sizeof(WCHAR);
if (!pReconv) {
// Return need size to reconvert.
if (len == 0) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleReconvert, There are not selected text"));
return false;
}
*oResult = needSize;
MOZ_LOG(gIMMLog, LogLevel::Info,
("HandleReconvert, succeeded, result=%ld",
*oResult));
return true;
}
if (pReconv->dwSize < needSize) {
MOZ_LOG(gIMMLog, LogLevel::Info,
("HandleReconvert, FAILED, pReconv->dwSize=%ld, needSize=%ld",
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;
::CopyMemory(reinterpret_cast<LPVOID>(lParam + sizeof(RECONVERTSTRING)),
selection.mString.get(), len * sizeof(WCHAR));
MOZ_LOG(gIMMLog, LogLevel::Info,
("HandleReconvert, SUCCEEDED, pReconv=%s, result=%ld",
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(gIMMLog, LogLevel::Error,
("HandleQueryCharPosition, FAILED, due to pCharPosition is null"));
return false;
}
if (pCharPosition->dwSize < sizeof(IMECHARPOSITION)) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleReconvert, FAILED, pCharPosition->dwSize=%ld, "
"sizeof(IMECHARPOSITION)=%ld",
pCharPosition->dwSize, sizeof(IMECHARPOSITION)));
return false;
}
if (::GetFocus() != aWindow->GetWindowHandle()) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleReconvert, FAILED, ::GetFocus()=%08x, OurWindowHandle=%08x",
::GetFocus(), aWindow->GetWindowHandle()));
return false;
}
if (pCharPosition->dwCharPos > len) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleQueryCharPosition, FAILED, pCharPosition->dwCharPos=%ld, "
"len=%ld",
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 editorRect(true, eQueryEditorRect, aWindow);
aWindow->InitEvent(editorRect);
DispatchEvent(aWindow, editorRect);
if (NS_WARN_IF(!editorRect.mSucceeded)) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleQueryCharPosition, eQueryEditorRect failed"));
::GetWindowRect(aWindow->GetWindowHandle(), &pCharPosition->rcDocument);
} else {
LayoutDeviceIntRect editorRectInWindow = editorRect.mReply.mRect;
nsWindow* window = editorRect.mReply.mFocusedWidget ?
static_cast<nsWindow*>(editorRect.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(gIMMLog, LogLevel::Info,
("HandleQueryCharPosition, SUCCEEDED, pCharPosition={ pt={ x=%d, "
"y=%d }, cLineHeight=%d, rcDocument={ left=%d, top=%d, right=%d, "
"bottom=%d } }",
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) {
Selection& selection = GetSelection();
if (!selection.EnsureValidSelection(aWindow)) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleDocumentFeed, FAILED, due to "
"Selection::EnsureValidSelection() failure"));
return false;
}
targetOffset = int32_t(selection.mOffset);
targetLength = int32_t(selection.Length());
} 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(gIMMLog, LogLevel::Error,
("HandleDocumentFeed, FAILED, due to the selection is out of "
"range"));
return false;
}
// Get all contents of the focused editor.
WidgetQueryContentEvent textContent(true, eQueryTextContent, aWindow);
textContent.InitForQueryTextContent(0, UINT32_MAX);
aWindow->InitEvent(textContent, &point);
DispatchEvent(aWindow, textContent);
if (!textContent.mSucceeded) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleDocumentFeed, FAILED, due to eQueryTextContent failure"));
return false;
}
nsAutoString str(textContent.mReply.mString);
if (targetOffset > int32_t(str.Length())) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("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 = str.RFind("\n", false, targetOffset, -1) + 1;
int32_t paragraphEnd =
str.Find("\r", false, targetOffset + targetLength, -1);
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(gIMMLog, LogLevel::Info,
("HandleDocumentFeed, succeeded, result=%ld",
*oResult));
return true;
}
if (pReconv->dwSize < needSize) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("HandleDocumentFeed, FAILED, pReconv->dwSize=%ld, needSize=%ld",
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(gIMMLog, LogLevel::Error,
("HandleDocumentFeed, FAILED, due to 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(gIMMLog, LogLevel::Info,
("HandleDocumentFeed, SUCCEEDED, pReconv=%s, result=%ld",
GetReconvertStringLog(pReconv).get(), *oResult));
return true;
}
bool
IMMHandler::CommitCompositionOnPreviousWindow(nsWindow* aWindow)
{
if (!mComposingWindow || mComposingWindow == aWindow) {
return false;
}
MOZ_LOG(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Error,
("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(gIMMLog, LogLevel::Info,
("DispatchCompositionChangeEvent, mClauseArray.Length()=0"));
rv =dispatcher->SetPendingComposition(mCompositionString, nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("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(gIMMLog, LogLevel::Error,
("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(gIMMLog, LogLevel::Info,
("DispatchCompositionChangeEvent, mClauseArray[%ld]=%lu. "
"This is larger than mCompositionString.Length()=%lu",
i + 1, current, mCompositionString.Length()));
current = int32_t(mCompositionString.Length());
}
uint32_t length = current - lastOffset;
TextRangeType textRangeType =
PlatformToNSAttr(mAttributeArray[lastOffset]);
rv = dispatcher->AppendClauseToPendingComposition(length, textRangeType);
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("DispatchCompositionChangeEvent, FAILED due to"
"TextEventDispatcher::AppendClauseToPendingComposition() failure"));
return;
}
lastOffset = current;
MOZ_LOG(gIMMLog, LogLevel::Info,
("DispatchCompositionChangeEvent, index=%ld, rangeType=%s, "
"range length=%lu",
i, ToChar(textRangeType), length));
}
}
if (mCursorPosition == NO_IME_CARET) {
MOZ_LOG(gIMMLog, LogLevel::Info,
("DispatchCompositionChangeEvent, no caret"));
} else {
uint32_t cursor = static_cast<uint32_t>(mCursorPosition);
if (cursor > mCompositionString.Length()) {
MOZ_LOG(gIMMLog, LogLevel::Info,
("CreateTextRangeArray, mCursorPosition=%ld. "
"This is larger than mCompositionString.Length()=%lu",
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(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Error,
("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(gIMMLog, LogLevel::Error,
("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(gIMMLog, LogLevel::Error,
("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(gIMMLog, LogLevel::Info,
("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 nsAFlatString& 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(gIMMLog, LogLevel::Error,
("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);
Selection& selection = GetSelection();
if (!selection.EnsureValidSelection(aWindow)) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("GetCharacterRectOfSelectedTextAt, FAILED, due to "
"Selection::EnsureValidSelection() failure"));
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.
uint32_t targetLength =
mIsComposing ? mCompositionString.Length() : selection.Length();
if (NS_WARN_IF(aOffset > targetLength)) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("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 (selection.Collapsed()) {
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 charRect(true, eQueryTextRect, aWindow);
WidgetQueryContentEvent::Options options;
options.mRelativeToInsertionPoint = true;
charRect.InitForQueryTextRect(aOffset, 1, options);
aWindow->InitEvent(charRect, &point);
DispatchEvent(aWindow, charRect);
if (charRect.mSucceeded) {
aCharRect = charRect.mReply.mRect;
if (aWritingMode) {
*aWritingMode = charRect.GetWritingMode();
}
MOZ_LOG(gIMMLog, LogLevel::Debug,
("GetCharacterRectOfSelectedTextAt, Succeeded, aOffset=%u, "
"aCharRect={ x: %ld, y: %ld, width: %ld, height: %ld }, "
"charRect.GetWritingMode()=%s",
aOffset, aCharRect.x, aCharRect.y, aCharRect.width, aCharRect.height,
GetWritingModeName(charRect.GetWritingMode()).get()));
return true;
}
}
return GetCaretRect(aWindow, aCharRect, aWritingMode);
}
bool
IMMHandler::GetCaretRect(nsWindow* aWindow,
LayoutDeviceIntRect& aCaretRect,
WritingMode* aWritingMode)
{
LayoutDeviceIntPoint point(0, 0);
WidgetQueryContentEvent caretRect(true, eQueryCaretRect, aWindow);
WidgetQueryContentEvent::Options options;
options.mRelativeToInsertionPoint = true;
caretRect.InitForQueryCaretRect(0, options);
aWindow->InitEvent(caretRect, &point);
DispatchEvent(aWindow, caretRect);
if (!caretRect.mSucceeded) {
MOZ_LOG(gIMMLog, LogLevel::Info,
("GetCaretRect, FAILED, due to eQueryCaretRect failure"));
return false;
}
aCaretRect = caretRect.mReply.mRect;
if (aWritingMode) {
*aWritingMode = caretRect.GetWritingMode();
}
MOZ_LOG(gIMMLog, LogLevel::Info,
("GetCaretRect, SUCCEEDED, "
"aCaretRect={ x: %ld, y: %ld, width: %ld, height: %ld }, "
"caretRect.GetWritingMode()=%s",
aCaretRect.x, aCaretRect.y, aCaretRect.width, aCaretRect.height,
GetWritingModeName(caretRect.GetWritingMode()).get()));
return true;
}
bool
IMMHandler::SetIMERelatedWindowsPos(nsWindow* aWindow,
const IMEContext& aContext)
{
LayoutDeviceIntRect r;
// Get first character rect of current a normal selected text or a composing
// string.
WritingMode writingMode;
bool ret = GetCharacterRectOfSelectedTextAt(aWindow, 0, r, &writingMode);
NS_ENSURE_TRUE(ret, false);
nsWindow* toplevelWindow = aWindow->GetTopLevelWindow(false);
LayoutDeviceIntRect firstSelectedCharRect;
ResolveIMECaretPos(toplevelWindow, r, 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.
LayoutDeviceIntRect caretRect(firstSelectedCharRect);
if (GetCaretRect(aWindow, r)) {
ResolveIMECaretPos(toplevelWindow, r, aWindow, caretRect);
} else {
NS_WARNING("failed to get caret rect");
caretRect.width = 1;
}
if (!mNativeCaretIsCreated) {
mNativeCaretIsCreated = ::CreateCaret(aWindow->GetWindowHandle(), nullptr,
caretRect.width, caretRect.height);
MOZ_LOG(gIMMLog, LogLevel::Info,
("SetIMERelatedWindowsPos, mNativeCaretIsCreated=%s, "
"width=%ld, height=%ld",
GetBoolName(mNativeCaretIsCreated), caretRect.width, caretRect.height));
}
::SetCaretPos(caretRect.x, caretRect.y);
if (ShouldDrawCompositionStringOurselves()) {
MOZ_LOG(gIMMLog, LogLevel::Info,
("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(gIMMLog, LogLevel::Error,
("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(gIMMLog, LogLevel::Info,
("SetIMERelatedWindowsPos, Calling ImmSetCandidateWindow()... "
"ptCurrentPos={ x=%d, y=%d }, "
"rcArea={ left=%d, top=%d, right=%d, bottom=%d }, "
"writingMode=%s",
candForm.ptCurrentPos.x, candForm.ptCurrentPos.y,
candForm.rcArea.left, candForm.rcArea.top,
candForm.rcArea.right, candForm.rcArea.bottom,
GetWritingModeName(writingMode).get()));
::ImmSetCandidateWindow(aContext.get(), &candForm);
} else {
MOZ_LOG(gIMMLog, LogLevel::Info,
("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::SetIMERelatedWindowsPosOnPlugin(nsWindow* aWindow,
const IMEContext& aContext)
{
WidgetQueryContentEvent editorRectEvent(true, eQueryEditorRect, aWindow);
aWindow->InitEvent(editorRectEvent);
DispatchEvent(aWindow, editorRectEvent);
if (!editorRectEvent.mSucceeded) {
MOZ_LOG(gIMMLog, LogLevel::Info,
("SetIMERelatedWindowsPosOnPlugin, "
"FAILED, due to eQueryEditorRect failure"));
return;
}
// Clip the plugin rect by the client rect of the window because composition
// window needs to be specified the position in the client area.
nsWindow* toplevelWindow = aWindow->GetTopLevelWindow(false);
LayoutDeviceIntRect pluginRectInScreen =
editorRectEvent.mReply.mRect + toplevelWindow->WidgetToScreenOffset();
LayoutDeviceIntRect winRectInScreen;
aWindow->GetClientBounds(winRectInScreen);
// composition window cannot be positioned on the edge of client area.
winRectInScreen.width--;
winRectInScreen.height--;
LayoutDeviceIntRect clippedPluginRect;
clippedPluginRect.x =
std::min(std::max(pluginRectInScreen.x, winRectInScreen.x),
winRectInScreen.XMost());
clippedPluginRect.y =
std::min(std::max(pluginRectInScreen.y, winRectInScreen.y),
winRectInScreen.YMost());
int32_t xMost = std::min(pluginRectInScreen.XMost(), winRectInScreen.XMost());
int32_t yMost = std::min(pluginRectInScreen.YMost(), winRectInScreen.YMost());
clippedPluginRect.width = std::max(0, xMost - clippedPluginRect.x);
clippedPluginRect.height = std::max(0, yMost - clippedPluginRect.y);
clippedPluginRect -= aWindow->WidgetToScreenOffset();
// Cover the plugin with native caret. This prevents IME's window and plugin
// overlap.
if (mNativeCaretIsCreated) {
::DestroyCaret();
}
mNativeCaretIsCreated =
::CreateCaret(aWindow->GetWindowHandle(), nullptr,
clippedPluginRect.width, clippedPluginRect.height);
::SetCaretPos(clippedPluginRect.x, clippedPluginRect.y);
// Set the composition window to bottom-left of the clipped plugin.
// As far as we know, there is no IME for RTL language. Therefore, this code
// must not need to take care of RTL environment.
COMPOSITIONFORM compForm;
compForm.dwStyle = CFS_POINT;
compForm.ptCurrentPos.x = clippedPluginRect.BottomLeft().x;
compForm.ptCurrentPos.y = clippedPluginRect.BottomLeft().y;
if (!::ImmSetCompositionWindow(aContext.get(), &compForm)) {
MOZ_LOG(gIMMLog, LogLevel::Info,
("SetIMERelatedWindowsPosOnPlugin, "
"FAILED, due to ::ImmSetCompositionWindow() failure"));
return;
}
}
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 =
Preferences::GetString("intl.imm.composition_font");
// 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(gIMMLog, LogLevel::Error,
("AdjustCompositionFont, ::ImmGetCompositionFont() failed"));
sCompositionFont.AssignLiteral("System");
} else {
// The font face is typically, "System".
sCompositionFont.Assign(defaultLogFont.lfFaceName);
}
}
MOZ_LOG(gIMMLog, LogLevel::Info,
("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";
sCompositionFontForJapanist2003 =
Preferences::GetString(kCompositionFontForJapanist2003);
// 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(gIMMLog, LogLevel::Error,
("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 (!aWindow->PluginHasFocus() &&
aWritingMode.IsVertical() && IsVerticalWritingSupported()) {
SetVerticalFontToLogFont(
IsJapanist2003Active() ? sCompositionFontForJapanist2003 :
sCompositionFont, logFont);
} else {
SetHorizontalFontToLogFont(
IsJapanist2003Active() ? sCompositionFontForJapanist2003 :
sCompositionFont, logFont);
}
MOZ_LOG(gIMMLog, LogLevel::Warning,
("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 WidgetMouseEventBase::eLeftButton:
button = IMEMOUSE_LDOWN;
break;
case WidgetMouseEventBase::eMiddleButton:
button = IMEMOUSE_MDOWN;
break;
case WidgetMouseEventBase::eRightButton:
button = IMEMOUSE_RDOWN;
break;
default:
return NS_OK;
}
// calcurate positioning and offset
// char : JCH1|JCH2|JCH3
// offset: 0011 1122 2233
// positioning: 2301 2301 2301
nsIntPoint cursorPos =
aIMENotification.mMouseButtonEventData.mCursorPos.AsIntPoint();
nsIntRect charRect =
aIMENotification.mMouseButtonEventData.mCharRect.AsIntRect();
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(gIMMLog, LogLevel::Info,
("OnMouseButtonEvent, x,y=%ld,%ld, offset=%ld, positioning=%ld",
cursorPos.x, cursorPos.y, 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(gIMMLog, LogLevel::Info,
("OnKeyDownEvent, hWnd=%08x, wParam=%08x, lParam=%08x",
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;
}
}
// static
void
IMMHandler::SetCandidateWindow(nsWindow* aWindow, CANDIDATEFORM* aForm)
{
// Hack for ATOK. ATOK (Japanese IME) refers native caret position at
// deciding candidate window position.
if (aWindow->PluginHasFocus()) {
// We cannot retrieve proper character height from plugin. Therefore,
// we should assume that the caret height is always 20px since if less than
// this height, candidate window may overlap with composition string when
// there is no enough space under composition string to show candidate
// window.
static const int32_t kCaretHeight = 20;
if (sNativeCaretIsCreatedForPlugin) {
::DestroyCaret();
}
sNativeCaretIsCreatedForPlugin =
::CreateCaret(aWindow->GetWindowHandle(), nullptr, 0, kCaretHeight);
if (sNativeCaretIsCreatedForPlugin) {
LayoutDeviceIntPoint caretPosition(aForm->ptCurrentPos.x,
aForm->ptCurrentPos.y - kCaretHeight);
nsWindow* toplevelWindow = aWindow->GetTopLevelWindow(false);
if (toplevelWindow && toplevelWindow != aWindow) {
caretPosition += toplevelWindow->WidgetToScreenOffset();
caretPosition -= aWindow->WidgetToScreenOffset();
}
::SetCaretPos(caretPosition.x, caretPosition.y);
}
}
IMEContext context(aWindow);
::ImmSetCandidateWindow(context.get(), aForm);
}
// staitc
void
IMMHandler::DefaultProcOfPluginEvent(nsWindow* aWindow, const NPEvent* aEvent)
{
switch (aEvent->event) {
case WM_IME_STARTCOMPOSITION:
EnsureHandlerInstance();
gIMMHandler->OnIMEStartCompositionOnPlugin(aWindow, aEvent->wParam,
aEvent->lParam);
break;
case WM_IME_COMPOSITION:
if (gIMMHandler) {
gIMMHandler->OnIMECompositionOnPlugin(aWindow, aEvent->wParam,
aEvent->lParam);
}
break;
case WM_IME_ENDCOMPOSITION:
if (gIMMHandler) {
gIMMHandler->OnIMEEndCompositionOnPlugin(aWindow, aEvent->wParam,
aEvent->lParam);
}
break;
}
}
/******************************************************************************
* IMMHandler::Selection
******************************************************************************/
bool
IMMHandler::Selection::IsValid() const
{
if (!mIsValid || NS_WARN_IF(mOffset == UINT32_MAX)) {
return false;
}
CheckedInt<uint32_t> endOffset =
CheckedInt<uint32_t>(mOffset) + Length();
return endOffset.isValid();
}
bool
IMMHandler::Selection::Update(const IMENotification& aIMENotification)
{
mOffset = aIMENotification.mSelectionChangeData.mOffset;
mString = aIMENotification.mSelectionChangeData.String();
mWritingMode = aIMENotification.mSelectionChangeData.GetWritingMode();
mIsValid = true;
MOZ_LOG(gIMMLog, LogLevel::Info,
("Selection::Update, aIMENotification={ mSelectionChangeData={ "
"mOffset=%u, mLength=%u, GetWritingMode()=%s } }",
mOffset, mString.Length(), GetWritingModeName(mWritingMode).get()));
if (!IsValid()) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("Selection::Update, FAILED, due to invalid range"));
Clear();
return false;
}
return true;
}
bool
IMMHandler::Selection::Init(nsWindow* aWindow)
{
Clear();
WidgetQueryContentEvent selection(true, eQuerySelectedText, aWindow);
LayoutDeviceIntPoint point(0, 0);
aWindow->InitEvent(selection, &point);
DispatchEvent(aWindow, selection);
if (NS_WARN_IF(!selection.mSucceeded)) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("Selection::Init, FAILED, due to eQuerySelectedText failure"));
return false;
}
// If the window is destroyed during querying selected text, we shouldn't
// do anymore.
if (aWindow->Destroyed()) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("Selection::Init, FAILED, due to the widget destroyed"));
return false;
}
mOffset = selection.mReply.mOffset;
mString = selection.mReply.mString;
mWritingMode = selection.GetWritingMode();
mIsValid = true;
MOZ_LOG(gIMMLog, LogLevel::Info,
("Selection::Init, selection={ mReply={ mOffset=%u, "
"mString.Length()=%u, mWritingMode=%s } }",
mOffset, mString.Length(), GetWritingModeName(mWritingMode).get()));
if (!IsValid()) {
MOZ_LOG(gIMMLog, LogLevel::Error,
("Selection::Init, FAILED, due to invalid range"));
Clear();
return false;
}
return true;
}
bool
IMMHandler::Selection::EnsureValidSelection(nsWindow* aWindow)
{
if (IsValid()) {
return true;
}
return Init(aWindow);
}
} // namespace widget
} // namespace mozilla
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