mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-06 17:16:12 +00:00
495 lines
17 KiB
C++
495 lines
17 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/. */
|
|
|
|
#ifndef IMMHandler_h_
|
|
#define IMMHandler_h_
|
|
|
|
#include "nscore.h"
|
|
#include <windows.h>
|
|
#include "nsCOMPtr.h"
|
|
#include "nsString.h"
|
|
#include "nsTArray.h"
|
|
#include "nsIWidget.h"
|
|
#include "mozilla/EventForwards.h"
|
|
#include "mozilla/TextEventDispatcher.h"
|
|
#include "nsRect.h"
|
|
#include "WritingModes.h"
|
|
#include "npapi.h"
|
|
|
|
class nsWindow;
|
|
|
|
namespace mozilla {
|
|
namespace widget {
|
|
|
|
struct MSGResult;
|
|
|
|
class IMEContext final
|
|
{
|
|
public:
|
|
IMEContext()
|
|
: mWnd(nullptr)
|
|
, mIMC(nullptr)
|
|
{
|
|
}
|
|
|
|
explicit IMEContext(HWND aWnd);
|
|
explicit IMEContext(nsWindow* aWindow);
|
|
|
|
~IMEContext()
|
|
{
|
|
Clear();
|
|
}
|
|
|
|
HIMC get() const
|
|
{
|
|
return mIMC;
|
|
}
|
|
|
|
void Init(HWND aWnd);
|
|
void Init(nsWindow* aWindow);
|
|
void Clear();
|
|
|
|
bool IsValid() const
|
|
{
|
|
return !!mIMC;
|
|
}
|
|
|
|
void SetOpenState(bool aOpen) const
|
|
{
|
|
if (!mIMC) {
|
|
return;
|
|
}
|
|
::ImmSetOpenStatus(mIMC, aOpen);
|
|
}
|
|
|
|
bool GetOpenState() const
|
|
{
|
|
if (!mIMC) {
|
|
return false;
|
|
}
|
|
return (::ImmGetOpenStatus(mIMC) != FALSE);
|
|
}
|
|
|
|
bool AssociateDefaultContext()
|
|
{
|
|
// We assume that there is only default IMC, no new IMC has been created.
|
|
if (mIMC) {
|
|
return false;
|
|
}
|
|
if (!::ImmAssociateContextEx(mWnd, nullptr, IACE_DEFAULT)) {
|
|
return false;
|
|
}
|
|
mIMC = ::ImmGetContext(mWnd);
|
|
return (mIMC != nullptr);
|
|
}
|
|
|
|
bool Disassociate()
|
|
{
|
|
if (!mIMC) {
|
|
return false;
|
|
}
|
|
if (!::ImmAssociateContextEx(mWnd, nullptr, 0)) {
|
|
return false;
|
|
}
|
|
::ImmReleaseContext(mWnd, mIMC);
|
|
mIMC = nullptr;
|
|
return true;
|
|
}
|
|
|
|
protected:
|
|
IMEContext(const IMEContext& aOther)
|
|
{
|
|
MOZ_CRASH("Don't copy IMEContext");
|
|
}
|
|
|
|
HWND mWnd;
|
|
HIMC mIMC;
|
|
};
|
|
|
|
class IMMHandler final
|
|
{
|
|
public:
|
|
static void Initialize();
|
|
static void Terminate();
|
|
|
|
// If Process*() returns true, the caller shouldn't do anything anymore.
|
|
static bool ProcessMessage(nsWindow* aWindow, UINT msg,
|
|
WPARAM& wParam, LPARAM& lParam,
|
|
MSGResult& aResult);
|
|
static bool IsComposing()
|
|
{
|
|
return IsComposingOnOurEditor();
|
|
}
|
|
static bool IsComposingOn(nsWindow* aWindow)
|
|
{
|
|
return IsComposing() && IsComposingWindow(aWindow);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/**
|
|
* IsIMEAvailable() returns TRUE when current keyboard layout has IME.
|
|
* Otherwise, FALSE.
|
|
*/
|
|
static bool IsIMEAvailable() { return !!::ImmIsIME(::GetKeyboardLayout(0)); }
|
|
#endif
|
|
|
|
// If aForce is TRUE, these methods doesn't check whether we have composition
|
|
// or not. If you don't set it to TRUE, these method doesn't commit/cancel
|
|
// the composition on uexpected window.
|
|
static void CommitComposition(nsWindow* aWindow, bool aForce = false);
|
|
static void CancelComposition(nsWindow* aWindow, bool aForce = false);
|
|
static void OnFocusChange(bool aFocus, nsWindow* aWindow);
|
|
static void OnUpdateComposition(nsWindow* aWindow);
|
|
static void OnSelectionChange(nsWindow* aWindow,
|
|
const IMENotification& aIMENotification,
|
|
bool aIsIMMActive);
|
|
|
|
static nsIMEUpdatePreference GetIMEUpdatePreference();
|
|
|
|
// Returns NS_SUCCESS_EVENT_CONSUMED if the mouse button event is consumed by
|
|
// IME. Otherwise, NS_OK.
|
|
static nsresult OnMouseButtonEvent(nsWindow* aWindow,
|
|
const IMENotification& aIMENotification);
|
|
static void SetCandidateWindow(nsWindow* aWindow, CANDIDATEFORM* aForm);
|
|
static void DefaultProcOfPluginEvent(nsWindow* aWindow,
|
|
const NPEvent* aEvent);
|
|
|
|
protected:
|
|
static void EnsureHandlerInstance();
|
|
|
|
static bool IsComposingOnOurEditor();
|
|
static bool IsComposingOnPlugin();
|
|
static bool IsComposingWindow(nsWindow* aWindow);
|
|
|
|
static bool IsJapanist2003Active();
|
|
static bool IsGoogleJapaneseInputActive();
|
|
|
|
static bool ShouldDrawCompositionStringOurselves();
|
|
static bool IsVerticalWritingSupported();
|
|
// aWindow can be nullptr if it's called without receiving WM_INPUTLANGCHANGE.
|
|
static void InitKeyboardLayout(nsWindow* aWindow, HKL aKeyboardLayout);
|
|
static UINT GetKeyboardCodePage();
|
|
|
|
/**
|
|
* Checks whether the window is top level window of the composing window.
|
|
* In this method, the top level window means in all windows, not only in all
|
|
* OUR windows. I.e., if the aWindow is embedded, this always returns FALSE.
|
|
*/
|
|
static bool IsTopLevelWindowOfComposition(nsWindow* aWindow);
|
|
|
|
static bool ProcessInputLangChangeMessage(nsWindow* aWindow,
|
|
WPARAM wParam,
|
|
LPARAM lParam,
|
|
MSGResult& aResult);
|
|
static bool ProcessMessageForPlugin(nsWindow* aWindow, UINT msg,
|
|
WPARAM &wParam, LPARAM &lParam,
|
|
bool &aRet, MSGResult& aResult);
|
|
|
|
IMMHandler();
|
|
~IMMHandler();
|
|
|
|
// On*() methods return true if the caller of message handler shouldn't do
|
|
// anything anymore. Otherwise, false.
|
|
static bool OnKeyDownEvent(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
|
|
bool OnIMEStartComposition(nsWindow* aWindow, MSGResult& aResult);
|
|
void OnIMEStartCompositionOnPlugin(nsWindow* aWindow,
|
|
WPARAM wParam, LPARAM lParam);
|
|
bool OnIMEComposition(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
void OnIMECompositionOnPlugin(nsWindow* aWindow, WPARAM wParam,
|
|
LPARAM lParam);
|
|
bool OnIMEEndComposition(nsWindow* aWindow, MSGResult& aResult);
|
|
void OnIMEEndCompositionOnPlugin(nsWindow* aWindow, WPARAM wParam,
|
|
LPARAM lParam);
|
|
bool OnIMERequest(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
bool OnIMECharOnPlugin(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
bool OnChar(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
bool OnCharOnPlugin(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
void OnInputLangChange(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
|
|
// These message handlers don't use instance members, we should not create
|
|
// the instance by the messages. So, they should be static.
|
|
static bool OnIMEChar(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
static bool OnIMESetContext(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
static bool OnIMESetContextOnPlugin(nsWindow* aWindow,
|
|
WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
static bool OnIMECompositionFull(nsWindow* aWindow, MSGResult& aResult);
|
|
static bool OnIMENotify(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
static bool OnIMESelect(nsWindow* aWindow, WPARAM wParam, LPARAM lParam,
|
|
MSGResult& aResult);
|
|
|
|
// The result of Handle* method mean "Processed" when it's TRUE.
|
|
void HandleStartComposition(nsWindow* aWindow,
|
|
const IMEContext& aContext);
|
|
bool HandleComposition(nsWindow* aWindow,
|
|
const IMEContext& aContext,
|
|
LPARAM lParam);
|
|
// If aCommitString is null, this commits composition with the latest
|
|
// dispatched data. Otherwise, commits composition with the value.
|
|
void HandleEndComposition(nsWindow* aWindow,
|
|
const nsAString* aCommitString = nullptr);
|
|
bool HandleReconvert(nsWindow* aWindow, LPARAM lParam, LRESULT *oResult);
|
|
bool HandleQueryCharPosition(nsWindow* aWindow, LPARAM lParam,
|
|
LRESULT *oResult);
|
|
bool HandleDocumentFeed(nsWindow* aWindow, LPARAM lParam, LRESULT *oResult);
|
|
|
|
/**
|
|
* When a window's IME context is activating but we have composition on
|
|
* another window, we should commit our composition because IME context is
|
|
* shared by all our windows (including plug-ins).
|
|
* @param aWindow is a new activated window.
|
|
* If aWindow is our composing window, this method does nothing.
|
|
* Otherwise, this commits the composition on the previous window.
|
|
* If this method did commit a composition, this returns TRUE.
|
|
*/
|
|
bool CommitCompositionOnPreviousWindow(nsWindow* aWindow);
|
|
|
|
/**
|
|
* ResolveIMECaretPos
|
|
* Convert the caret rect of a composition event to another widget's
|
|
* coordinate system.
|
|
*
|
|
* @param aReferenceWidget The origin widget of aCursorRect.
|
|
* Typically, this is mReferenceWidget of the
|
|
* composing events. If the aCursorRect is in screen
|
|
* coordinates, set nullptr.
|
|
* @param aCursorRect The cursor rect.
|
|
* @param aNewOriginWidget aOutRect will be in this widget's coordinates. If
|
|
* this is nullptr, aOutRect will be in screen
|
|
* coordinates.
|
|
* @param aOutRect The converted cursor rect.
|
|
*/
|
|
void ResolveIMECaretPos(nsIWidget* aReferenceWidget,
|
|
mozilla::LayoutDeviceIntRect& aCursorRect,
|
|
nsIWidget* aNewOriginWidget,
|
|
mozilla::LayoutDeviceIntRect& aOutRect);
|
|
|
|
bool ConvertToANSIString(const nsAFlatString& aStr,
|
|
UINT aCodePage,
|
|
nsACString& aANSIStr);
|
|
|
|
bool SetIMERelatedWindowsPos(nsWindow* aWindow,
|
|
const IMEContext& aContext);
|
|
void SetIMERelatedWindowsPosOnPlugin(nsWindow* aWindow,
|
|
const IMEContext& aContext);
|
|
/**
|
|
* GetCharacterRectOfSelectedTextAt() returns character rect of the offset
|
|
* from the selection start or the start of composition string if there is
|
|
* a composition.
|
|
*
|
|
* @param aWindow The window which has focus.
|
|
* @param aOffset Offset from the selection start or the start of
|
|
* composition string when there is a composition.
|
|
* This must be in the selection range or
|
|
* the composition string.
|
|
* @param aCharRect The result.
|
|
* @param aWritingMode The writing mode of current selection. When this
|
|
* is nullptr, this assumes that the selection is in
|
|
* horizontal writing mode.
|
|
* @return true if this succeeded to retrieve the rect.
|
|
* Otherwise, false.
|
|
*/
|
|
bool GetCharacterRectOfSelectedTextAt(
|
|
nsWindow* aWindow,
|
|
uint32_t aOffset,
|
|
mozilla::LayoutDeviceIntRect& aCharRect,
|
|
mozilla::WritingMode* aWritingMode = nullptr);
|
|
/**
|
|
* GetCaretRect() returns caret rect at current selection start.
|
|
*
|
|
* @param aWindow The window which has focus.
|
|
* @param aCaretRect The result.
|
|
* @param aWritingMode The writing mode of current selection. When this
|
|
* is nullptr, this assumes that the selection is in
|
|
* horizontal writing mode.
|
|
* @return true if this succeeded to retrieve the rect.
|
|
* Otherwise, false.
|
|
*/
|
|
bool GetCaretRect(nsWindow* aWindow,
|
|
mozilla::LayoutDeviceIntRect& aCaretRect,
|
|
mozilla::WritingMode* aWritingMode = nullptr);
|
|
void GetCompositionString(const IMEContext& aContext,
|
|
DWORD aIndex,
|
|
nsAString& aCompositionString) const;
|
|
|
|
/**
|
|
* AdjustCompositionFont() makes IME vertical writing mode if it's supported.
|
|
* If aForceUpdate is true, it will update composition font even if writing
|
|
* mode isn't being changed.
|
|
*/
|
|
void AdjustCompositionFont(nsWindow* aWindow,
|
|
const IMEContext& aContext,
|
|
const mozilla::WritingMode& aWritingMode,
|
|
bool aForceUpdate = false);
|
|
|
|
/**
|
|
* MaybeAdjustCompositionFont() calls AdjustCompositionFont() when the
|
|
* locale of active IME is CJK. Note that this creates an instance even
|
|
* when there is no composition but the locale is CJK.
|
|
*/
|
|
static void MaybeAdjustCompositionFont(
|
|
nsWindow* aWindow,
|
|
const mozilla::WritingMode& aWritingMode,
|
|
bool aForceUpdate = false);
|
|
|
|
/**
|
|
* Get the current target clause of composition string.
|
|
* If there are one or more characters whose attribute is ATTR_TARGET_*,
|
|
* this returns the first character's offset and its length.
|
|
* Otherwise, e.g., the all characters are ATTR_INPUT, this returns
|
|
* the composition string range because the all is the current target.
|
|
*
|
|
* aLength can be null (default), but aOffset must not be null.
|
|
*
|
|
* The aOffset value is offset in the contents. So, when you need offset
|
|
* in the composition string, you need to subtract mCompositionStart from it.
|
|
*/
|
|
bool GetTargetClauseRange(uint32_t *aOffset, uint32_t *aLength = nullptr);
|
|
|
|
/**
|
|
* DispatchEvent() dispatches aEvent if aWidget hasn't been destroyed yet.
|
|
*/
|
|
static void DispatchEvent(nsWindow* aWindow, WidgetGUIEvent& aEvent);
|
|
|
|
/**
|
|
* DispatchCompositionChangeEvent() dispatches eCompositionChange event
|
|
* with clause information (it'll be retrieved by CreateTextRangeArray()).
|
|
* I.e., this should be called only during composing. If a composition is
|
|
* being committed, only HandleCompositionEnd() should be called.
|
|
*
|
|
* @param aWindow The window which has the composition.
|
|
* @param aContext Native IME context which has the composition.
|
|
*/
|
|
void DispatchCompositionChangeEvent(nsWindow* aWindow,
|
|
const IMEContext& aContext);
|
|
|
|
nsresult EnsureClauseArray(int32_t aCount);
|
|
nsresult EnsureAttributeArray(int32_t aCount);
|
|
|
|
/**
|
|
* When WM_IME_CHAR is received and passed to DefWindowProc, we need to
|
|
* record the messages. In other words, we should record the messages
|
|
* when we receive WM_IME_CHAR on windowless plug-in (if we have focus,
|
|
* we always eat them). When focus is moved from a windowless plug-in to
|
|
* our window during composition, WM_IME_CHAR messages were received when
|
|
* the plug-in has focus. However, WM_CHAR messages are received after the
|
|
* plug-in lost focus. So, we need to ignore the WM_CHAR messages because
|
|
* they make unexpected text input events on us.
|
|
*/
|
|
nsTArray<MSG> mPassedIMEChar;
|
|
|
|
bool IsIMECharRecordsEmpty()
|
|
{
|
|
return mPassedIMEChar.IsEmpty();
|
|
}
|
|
void ResetIMECharRecords()
|
|
{
|
|
mPassedIMEChar.Clear();
|
|
}
|
|
void DequeueIMECharRecords(WPARAM &wParam, LPARAM &lParam)
|
|
{
|
|
MSG msg = mPassedIMEChar.ElementAt(0);
|
|
wParam = msg.wParam;
|
|
lParam = msg.lParam;
|
|
mPassedIMEChar.RemoveElementAt(0);
|
|
}
|
|
void EnqueueIMECharRecords(WPARAM wParam, LPARAM lParam)
|
|
{
|
|
MSG msg;
|
|
msg.wParam = wParam;
|
|
msg.lParam = lParam;
|
|
mPassedIMEChar.AppendElement(msg);
|
|
}
|
|
|
|
TextEventDispatcher* GetTextEventDispatcherFor(nsWindow* aWindow);
|
|
|
|
nsWindow* mComposingWindow;
|
|
RefPtr<TextEventDispatcher> mDispatcher;
|
|
nsString mCompositionString;
|
|
InfallibleTArray<uint32_t> mClauseArray;
|
|
InfallibleTArray<uint8_t> mAttributeArray;
|
|
|
|
int32_t mCursorPosition;
|
|
uint32_t mCompositionStart;
|
|
|
|
struct Selection
|
|
{
|
|
nsString mString;
|
|
uint32_t mOffset;
|
|
mozilla::WritingMode mWritingMode;
|
|
bool mIsValid;
|
|
|
|
Selection()
|
|
: mOffset(UINT32_MAX)
|
|
, mIsValid(false)
|
|
{
|
|
}
|
|
|
|
void Clear()
|
|
{
|
|
mOffset = UINT32_MAX;
|
|
mIsValid = false;
|
|
}
|
|
uint32_t Length() const { return mString.Length(); }
|
|
bool Collapsed() const { return !Length(); }
|
|
|
|
bool IsValid() const;
|
|
bool Update(const IMENotification& aIMENotification);
|
|
bool Init(nsWindow* aWindow);
|
|
bool EnsureValidSelection(nsWindow* aWindow);
|
|
private:
|
|
Selection(const Selection& aOther) = delete;
|
|
void operator =(const Selection& aOther) = delete;
|
|
};
|
|
// mSelection stores the latest selection data only when sHasFocus is true.
|
|
// Don't access mSelection directly. You should use GetSelection() for
|
|
// getting proper state.
|
|
Selection mSelection;
|
|
|
|
Selection& GetSelection()
|
|
{
|
|
// When IME has focus, mSelection is automatically updated by
|
|
// NOTIFY_IME_OF_SELECTION_CHANGE.
|
|
if (sHasFocus) {
|
|
return mSelection;
|
|
}
|
|
// Otherwise, i.e., While IME doesn't have focus, we cannot observe
|
|
// selection changes. So, in such case, we need to query selection
|
|
// when it's necessary.
|
|
static Selection sTempSelection;
|
|
sTempSelection.Clear();
|
|
return sTempSelection;
|
|
}
|
|
|
|
bool mIsComposing;
|
|
bool mIsComposingOnPlugin;
|
|
bool mNativeCaretIsCreated;
|
|
|
|
static mozilla::WritingMode sWritingModeOfCompositionFont;
|
|
static nsString sIMEName;
|
|
static UINT sCodePage;
|
|
static DWORD sIMEProperty;
|
|
static DWORD sIMEUIProperty;
|
|
static bool sAssumeVerticalWritingModeNotSupported;
|
|
static bool sHasFocus;
|
|
static bool sNativeCaretIsCreatedForPlugin;
|
|
};
|
|
|
|
} // namespace widget
|
|
} // namespace mozilla
|
|
|
|
#endif // IMMHandler_h_
|