gecko/widget/windows/WinIMEHandler.cpp

390 lines
11 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "WinIMEHandler.h"
#include "nsIMM32Handler.h"
#ifdef NS_ENABLE_TSF
#include "nsTextStore.h"
#endif // #ifdef NS_ENABLE_TSF
#include "nsWindow.h"
namespace mozilla {
namespace widget {
/******************************************************************************
* IMEHandler
******************************************************************************/
#ifdef NS_ENABLE_TSF
bool IMEHandler::sIsInTSFMode = false;
bool IMEHandler::sPluginHasFocus = false;
#endif // #ifdef NS_ENABLE_TSF
// static
void
IMEHandler::Initialize()
{
#ifdef NS_ENABLE_TSF
nsTextStore::Initialize();
sIsInTSFMode = nsTextStore::IsInTSFMode();
#endif // #ifdef NS_ENABLE_TSF
nsIMM32Handler::Initialize();
}
// static
void
IMEHandler::Terminate()
{
#ifdef NS_ENABLE_TSF
if (sIsInTSFMode) {
nsTextStore::Terminate();
sIsInTSFMode = false;
}
#endif // #ifdef NS_ENABLE_TSF
nsIMM32Handler::Terminate();
}
// static
void*
IMEHandler::GetNativeData(uint32_t aDataType)
{
#ifdef NS_ENABLE_TSF
void* result = nsTextStore::GetNativeData(aDataType);
if (!result || !(*(static_cast<void**>(result)))) {
return nullptr;
}
// XXX During the TSF module test, sIsInTSFMode must be true. After that,
// the value should be restored but currently, there is no way for that.
// When the TSF test is enabled again, we need to fix this. Perhaps,
// sending a message can fix this.
sIsInTSFMode = true;
return result;
#else // #ifdef NS_ENABLE_TSF
return nullptr;
#endif // #ifdef NS_ENABLE_TSF #else
}
// static
bool
IMEHandler::CanOptimizeKeyAndIMEMessages()
{
#ifdef NS_ENABLE_TSF
if (IsTSFAvailable()) {
return nsTextStore::CanOptimizeKeyAndIMEMessages();
}
#endif // #ifdef NS_ENABLE_TSF
return nsIMM32Handler::CanOptimizeKeyAndIMEMessages();
}
// static
bool
IMEHandler::IsIMEEnabled(const InputContext& aInputContext)
{
return IsIMEEnabled(aInputContext.mIMEState.mEnabled);
}
// static
bool
IMEHandler::IsIMEEnabled(IMEState::Enabled aIMEState)
{
return (aIMEState == mozilla::widget::IMEState::ENABLED ||
aIMEState == mozilla::widget::IMEState::PLUGIN);
}
// static
bool
IMEHandler::ProcessMessage(nsWindow* aWindow, UINT aMessage,
WPARAM& aWParam, LPARAM& aLParam,
LRESULT* aRetValue, bool& aEatMessage)
{
#ifdef NS_ENABLE_TSF
if (IsTSFAvailable()) {
if (aMessage == WM_USER_TSF_TEXTCHANGE) {
nsTextStore::OnTextChangeMsg();
aEatMessage = true;
return true;
}
return false;
}
#endif // #ifdef NS_ENABLE_TSF
return nsIMM32Handler::ProcessMessage(aWindow, aMessage, aWParam, aLParam,
aRetValue, aEatMessage);
}
// static
bool
IMEHandler::IsComposing()
{
#ifdef NS_ENABLE_TSF
if (IsTSFAvailable()) {
return nsTextStore::IsComposing();
}
#endif // #ifdef NS_ENABLE_TSF
return nsIMM32Handler::IsComposing();
}
// static
bool
IMEHandler::IsComposingOn(nsWindow* aWindow)
{
#ifdef NS_ENABLE_TSF
if (IsTSFAvailable()) {
return nsTextStore::IsComposingOn(aWindow);
}
#endif // #ifdef NS_ENABLE_TSF
return nsIMM32Handler::IsComposingOn(aWindow);
}
// static
nsresult
IMEHandler::NotifyIME(nsWindow* aWindow,
NotificationToIME aNotification)
{
#ifdef NS_ENABLE_TSF
if (IsTSFAvailable()) {
switch (aNotification) {
case NOTIFY_IME_OF_SELECTION_CHANGE:
return nsTextStore::OnSelectionChange();
case NOTIFY_IME_OF_FOCUS:
return nsTextStore::OnFocusChange(true, aWindow,
aWindow->GetInputContext().mIMEState.mEnabled);
case NOTIFY_IME_OF_BLUR:
return nsTextStore::OnFocusChange(false, aWindow,
aWindow->GetInputContext().mIMEState.mEnabled);
case REQUEST_TO_COMMIT_COMPOSITION:
if (nsTextStore::IsComposingOn(aWindow)) {
nsTextStore::CommitComposition(false);
}
return NS_OK;
case REQUEST_TO_CANCEL_COMPOSITION:
if (nsTextStore::IsComposingOn(aWindow)) {
nsTextStore::CommitComposition(true);
}
return NS_OK;
default:
return NS_ERROR_NOT_IMPLEMENTED;
}
}
#endif //NS_ENABLE_TSF
switch (aNotification) {
case REQUEST_TO_COMMIT_COMPOSITION:
nsIMM32Handler::CommitComposition(aWindow);
return NS_OK;
case REQUEST_TO_CANCEL_COMPOSITION:
nsIMM32Handler::CancelComposition(aWindow);
return NS_OK;
#ifdef NS_ENABLE_TSF
case NOTIFY_IME_OF_BLUR:
// If a plugin gets focus while TSF has focus, we need to notify TSF of
// the blur.
if (nsTextStore::ThinksHavingFocus()) {
return nsTextStore::OnFocusChange(false, aWindow,
aWindow->GetInputContext().mIMEState.mEnabled);
}
return NS_ERROR_NOT_IMPLEMENTED;
#endif //NS_ENABLE_TSF
default:
return NS_ERROR_NOT_IMPLEMENTED;
}
}
// static
nsresult
IMEHandler::NotifyIMEOfTextChange(uint32_t aStart,
uint32_t aOldEnd,
uint32_t aNewEnd)
{
#ifdef NS_ENABLE_TSF
if (IsTSFAvailable()) {
return nsTextStore::OnTextChange(aStart, aOldEnd, aNewEnd);
}
#endif //NS_ENABLE_TSF
return NS_ERROR_NOT_IMPLEMENTED;
}
// static
nsIMEUpdatePreference
IMEHandler::GetUpdatePreference()
{
#ifdef NS_ENABLE_TSF
if (IsTSFAvailable()) {
return nsTextStore::GetIMEUpdatePreference();
}
#endif //NS_ENABLE_TSF
return nsIMEUpdatePreference(false, false);
}
// static
bool
IMEHandler::GetOpenState(nsWindow* aWindow)
{
#ifdef NS_ENABLE_TSF
if (IsTSFAvailable()) {
return nsTextStore::GetIMEOpenState();
}
#endif //NS_ENABLE_TSF
nsIMEContext IMEContext(aWindow->GetWindowHandle());
return IMEContext.GetOpenState();
}
// static
void
IMEHandler::OnDestroyWindow(nsWindow* aWindow)
{
// We need to do nothing here for TSF. Just restore the default context
// if it's been disassociated.
nsIMEContext IMEContext(aWindow->GetWindowHandle());
IMEContext.AssociateDefaultContext();
}
// static
void
IMEHandler::SetInputContext(nsWindow* aWindow, InputContext& aInputContext)
{
// FYI: If there is no composition, this call will do nothing.
NotifyIME(aWindow, REQUEST_TO_COMMIT_COMPOSITION);
// Assume that SetInputContext() is called only when aWindow has focus.
sPluginHasFocus = (aInputContext.mIMEState.mEnabled == IMEState::PLUGIN);
bool enable = IsIMEEnabled(aInputContext);
bool adjustOpenState = (enable &&
aInputContext.mIMEState.mOpen != IMEState::DONT_CHANGE_OPEN_STATE);
bool open = (adjustOpenState &&
aInputContext.mIMEState.mOpen == IMEState::OPEN);
aInputContext.mNativeIMEContext = nullptr;
#ifdef NS_ENABLE_TSF
// Note that even while a plugin has focus, we need to notify TSF of that.
if (sIsInTSFMode) {
nsTextStore::SetInputContext(aInputContext);
if (IsTSFAvailable()) {
aInputContext.mNativeIMEContext = nsTextStore::GetTextStore();
}
// Currently, nsTextStore doesn't set focus to keyboard disabled document.
// Therefore, we still need to perform the following legacy code.
}
#endif // #ifdef NS_ENABLE_TSF
nsIMEContext IMEContext(aWindow->GetWindowHandle());
if (enable) {
IMEContext.AssociateDefaultContext();
if (!aInputContext.mNativeIMEContext) {
aInputContext.mNativeIMEContext = static_cast<void*>(IMEContext.get());
}
} else if (!aWindow->Destroyed()) {
// Don't disassociate the context after the window is destroyed.
IMEContext.Disassociate();
if (!aInputContext.mNativeIMEContext) {
// The old InputContext must store the default IMC.
aInputContext.mNativeIMEContext =
aWindow->GetInputContext().mNativeIMEContext;
}
}
if (adjustOpenState) {
#ifdef NS_ENABLE_TSF
if (IsTSFAvailable()) {
nsTextStore::SetIMEOpenState(open);
return;
}
#endif // #ifdef NS_ENABLE_TSF
IMEContext.SetOpenState(open);
}
}
// static
void
IMEHandler::InitInputContext(nsWindow* aWindow, InputContext& aInputContext)
{
// For a11y, the default enabled state should be 'enabled'.
aInputContext.mIMEState.mEnabled = IMEState::ENABLED;
#ifdef NS_ENABLE_TSF
if (sIsInTSFMode) {
nsTextStore::SetInputContext(aInputContext);
aInputContext.mNativeIMEContext = nsTextStore::GetTextStore();
MOZ_ASSERT(aInputContext.mNativeIMEContext);
return;
}
#endif // #ifdef NS_ENABLE_TSF
// NOTE: mNativeIMEContext may be null if IMM module isn't installed.
nsIMEContext IMEContext(aWindow->GetWindowHandle());
aInputContext.mNativeIMEContext = static_cast<void*>(IMEContext.get());
MOZ_ASSERT(aInputContext.mNativeIMEContext || !CurrentKeyboardLayoutHasIME());
// If no IME context is available, we should set the widget's pointer since
// nullptr indicates there is only one context per process on the platform.
if (!aInputContext.mNativeIMEContext) {
aInputContext.mNativeIMEContext = static_cast<void*>(aWindow);
}
}
#ifdef DEBUG
// static
bool
IMEHandler::CurrentKeyboardLayoutHasIME()
{
#ifdef NS_ENABLE_TSF
if (sIsInTSFMode) {
return nsTextStore::CurrentKeyboardLayoutHasIME();
}
#endif // #ifdef NS_ENABLE_TSF
return nsIMM32Handler::IsIMEAvailable();
}
#endif // #ifdef DEBUG
// static
bool
IMEHandler::IsDoingKakuteiUndo(HWND aWnd)
{
// Following message pattern is caused by "Kakutei-Undo" of ATOK or WXG:
// ---------------------------------------------------------------------------
// WM_KEYDOWN * n (wParam = VK_BACK, lParam = 0x1)
// WM_KEYUP * 1 (wParam = VK_BACK, lParam = 0xC0000001) # ATOK
// WM_IME_STARTCOMPOSITION * 1 (wParam = 0x0, lParam = 0x0)
// WM_IME_COMPOSITION * 1 (wParam = 0x0, lParam = 0x1BF)
// WM_CHAR * n (wParam = VK_BACK, lParam = 0x1)
// WM_KEYUP * 1 (wParam = VK_BACK, lParam = 0xC00E0001)
// ---------------------------------------------------------------------------
// This doesn't match usual key message pattern such as:
// WM_KEYDOWN -> WM_CHAR -> WM_KEYDOWN -> WM_CHAR -> ... -> WM_KEYUP
// See following bugs for the detail.
// https://bugzilla.mozilla.gr.jp/show_bug.cgi?id=2885 (written in Japanese)
// https://bugzilla.mozilla.org/show_bug.cgi?id=194559 (written in English)
MSG startCompositionMsg, compositionMsg, charMsg;
return ::PeekMessageW(&startCompositionMsg, aWnd,
WM_IME_STARTCOMPOSITION, WM_IME_STARTCOMPOSITION,
PM_NOREMOVE | PM_NOYIELD) &&
::PeekMessageW(&compositionMsg, aWnd, WM_IME_COMPOSITION,
WM_IME_COMPOSITION, PM_NOREMOVE | PM_NOYIELD) &&
::PeekMessageW(&charMsg, aWnd, WM_CHAR, WM_CHAR,
PM_NOREMOVE | PM_NOYIELD) &&
startCompositionMsg.wParam == 0x0 &&
startCompositionMsg.lParam == 0x0 &&
compositionMsg.wParam == 0x0 &&
compositionMsg.lParam == 0x1BF &&
charMsg.wParam == VK_BACK && charMsg.lParam == 0x1 &&
startCompositionMsg.time <= compositionMsg.time &&
compositionMsg.time <= charMsg.time;
}
} // namespace widget
} // namespace mozilla