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133 lines
3.7 KiB
C++
133 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef WinIMEHandler_h_
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#define WinIMEHandler_h_
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#include "nscore.h"
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#include "nsIWidget.h"
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#include <windows.h>
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#include <inputscope.h>
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#define NS_WM_IMEFIRST WM_IME_SETCONTEXT
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#define NS_WM_IMELAST WM_IME_KEYUP
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class nsWindow;
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namespace mozilla {
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namespace widget {
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struct MSGResult;
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/**
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* IMEHandler class is a mediator class. On Windows, there are two IME API
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* sets: One is IMM which is legacy API set. The other is TSF which is modern
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* API set. By using this class, non-IME handler classes don't need to worry
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* that we're in which mode.
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*/
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class IMEHandler MOZ_FINAL
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{
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public:
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static void Initialize();
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static void Terminate();
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/**
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* Returns TSF related native data.
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*/
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static void* GetNativeData(uint32_t aDataType);
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/**
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* ProcessRawKeyMessage() message is called before calling TranslateMessage()
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* and DispatchMessage(). If this returns true, the message is consumed.
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* Then, caller must not perform TranslateMessage() nor DispatchMessage().
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*/
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static bool ProcessRawKeyMessage(const MSG& aMsg);
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/**
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* When the message is not needed to handle anymore by the caller, this
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* returns true. Otherwise, false.
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*/
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static bool ProcessMessage(nsWindow* aWindow, UINT aMessage,
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WPARAM& aWParam, LPARAM& aLParam,
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MSGResult& aResult);
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/**
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* When there is a composition, returns true. Otherwise, false.
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*/
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static bool IsComposing();
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/**
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* When there is a composition and it's in the window, returns true.
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* Otherwise, false.
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*/
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static bool IsComposingOn(nsWindow* aWindow);
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/**
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* Notifies IME of the notification (a request or an event).
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*/
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static nsresult NotifyIME(nsWindow* aWindow,
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const IMENotification& aIMENotification);
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/**
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* Returns update preferences.
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*/
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static nsIMEUpdatePreference GetUpdatePreference();
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/**
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* Returns IME open state on the window.
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*/
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static bool GetOpenState(nsWindow* aWindow);
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/**
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* Called when the window is destroying.
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*/
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static void OnDestroyWindow(nsWindow* aWindow);
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/**
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* Called when nsIWidget::SetInputContext() is called before the window's
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* InputContext is modified actually.
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*/
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static void SetInputContext(nsWindow* aWindow,
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InputContext& aInputContext,
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const InputContextAction& aAction);
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/**
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* Associate or disassociate IME context to/from the aWindow.
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*/
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static void AssociateIMEContext(nsWindow* aWindow, bool aEnable);
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/**
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* Called when the window is created.
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*/
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static void InitInputContext(nsWindow* aWindow, InputContext& aInputContext);
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#ifdef DEBUG
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/**
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* Returns true when current keyboard layout has IME. Otherwise, false.
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*/
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static bool CurrentKeyboardLayoutHasIME();
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#endif // #ifdef DEBUG
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private:
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#ifdef NS_ENABLE_TSF
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static decltype(SetInputScopes)* sSetInputScopes;
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static void SetInputScopeForIMM32(nsWindow* aWindow,
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const nsAString& aHTMLInputType);
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static bool sIsInTSFMode;
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// If sIMMEnabled is false, any IME messages are not handled in TSF mode.
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// Additionally, IME context is always disassociated from focused window.
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static bool sIsIMMEnabled;
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static bool sPluginHasFocus;
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static bool IsTSFAvailable() { return (sIsInTSFMode && !sPluginHasFocus); }
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static bool IsIMMActive();
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#endif // #ifdef NS_ENABLE_TSF
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};
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} // namespace widget
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} // namespace mozilla
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#endif // #ifndef WinIMEHandler_h_
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