The Tor Browser: widget/windows/nsTextStore.h@b8a032363ba2 (annotated)

widget/windows/nsTextStore.h@b8a032363ba2 (annotated)

widget/windows/nsTextStore.h

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- 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 NSTEXTSTORE_H_
 #define NSTEXTSTORE_H_
 #include "nsAutoPtr.h"
 #include "nsString.h"
 #include "nsCOMPtr.h"
 #include "nsIWidget.h"
 #include "nsWindowBase.h"
 #include "mozilla/Attributes.h"
 #include "mozilla/TextRange.h"
 #include "mozilla/WindowsVersion.h"
 #include <msctf.h>
 #include <textstor.h>
 // GUID_PROP_INPUTSCOPE is declared in inputscope.h using INIT_GUID.
 // With initguid.h, we get its instance instead of extern declaration.
 #ifdef INPUTSCOPE_INIT_GUID
 #include <initguid.h>
 #endif
 #include <inputscope.h>
 // TSF InputScope, for earlier SDK 8
 #define IS_SEARCH static_cast<InputScope>(50)
 struct ITfThreadMgr;
 struct ITfDocumentMgr;
 struct ITfDisplayAttributeMgr;
 struct ITfCategoryMgr;
 class nsWindow;
 #ifdef MOZ_METRO
 class MetroWidget;
 #endif
 namespace mozilla {
 namespace widget {
 struct MSGResult;
 } // namespace widget
 } // namespace mozilla
 /*
  * Text Services Framework text store
  */
 class nsTextStore MOZ_FINAL : public ITextStoreACP,
                               public ITfContextOwnerCompositionSink,
                               public ITfActiveLanguageProfileNotifySink,
                               public ITfInputProcessorProfileActivationSink
 {
 public: /*IUnknown*/
   STDMETHODIMP_(ULONG)  AddRef(void);
   STDMETHODIMP          QueryInterface(REFIID, void**);
   STDMETHODIMP_(ULONG)  Release(void);
 public: /*ITextStoreACP*/
   STDMETHODIMP AdviseSink(REFIID, IUnknown*, DWORD);
   STDMETHODIMP UnadviseSink(IUnknown*);
   STDMETHODIMP RequestLock(DWORD, HRESULT*);
   STDMETHODIMP GetStatus(TS_STATUS*);
   STDMETHODIMP QueryInsert(LONG, LONG, ULONG, LONG*, LONG*);
   STDMETHODIMP GetSelection(ULONG, ULONG, TS_SELECTION_ACP*, ULONG*);
   STDMETHODIMP SetSelection(ULONG, const TS_SELECTION_ACP*);
   STDMETHODIMP GetText(LONG, LONG, WCHAR*, ULONG, ULONG*, TS_RUNINFO*, ULONG,
                        ULONG*, LONG*);
   STDMETHODIMP SetText(DWORD, LONG, LONG, const WCHAR*, ULONG, TS_TEXTCHANGE*);
   STDMETHODIMP GetFormattedText(LONG, LONG, IDataObject**);
   STDMETHODIMP GetEmbedded(LONG, REFGUID, REFIID, IUnknown**);
   STDMETHODIMP QueryInsertEmbedded(const GUID*, const FORMATETC*, BOOL*);
   STDMETHODIMP InsertEmbedded(DWORD, LONG, LONG, IDataObject*, TS_TEXTCHANGE*);
   STDMETHODIMP RequestSupportedAttrs(DWORD, ULONG, const TS_ATTRID*);
   STDMETHODIMP RequestAttrsAtPosition(LONG, ULONG, const TS_ATTRID*, DWORD);
   STDMETHODIMP RequestAttrsTransitioningAtPosition(LONG, ULONG,
                                                    const TS_ATTRID*, DWORD);
   STDMETHODIMP FindNextAttrTransition(LONG, LONG, ULONG, const TS_ATTRID*,
                                       DWORD, LONG*, BOOL*, LONG*);
   STDMETHODIMP RetrieveRequestedAttrs(ULONG, TS_ATTRVAL*, ULONG*);
   STDMETHODIMP GetEndACP(LONG*);
   STDMETHODIMP GetActiveView(TsViewCookie*);
   STDMETHODIMP GetACPFromPoint(TsViewCookie, const POINT*, DWORD, LONG*);
   STDMETHODIMP GetTextExt(TsViewCookie, LONG, LONG, RECT*, BOOL*);
   STDMETHODIMP GetScreenExt(TsViewCookie, RECT*);
   STDMETHODIMP GetWnd(TsViewCookie, HWND*);
   STDMETHODIMP InsertTextAtSelection(DWORD, const WCHAR*, ULONG, LONG*, LONG*,
                                      TS_TEXTCHANGE*);
   STDMETHODIMP InsertEmbeddedAtSelection(DWORD, IDataObject*, LONG*, LONG*,
                                          TS_TEXTCHANGE*);
 public: /*ITfContextOwnerCompositionSink*/
   STDMETHODIMP OnStartComposition(ITfCompositionView*, BOOL*);
   STDMETHODIMP OnUpdateComposition(ITfCompositionView*, ITfRange*);
   STDMETHODIMP OnEndComposition(ITfCompositionView*);
 public: /*ITfActiveLanguageProfileNotifySink*/
   STDMETHODIMP OnActivated(REFCLSID clsid, REFGUID guidProfile,
                            BOOL fActivated);
 public: /*ITfInputProcessorProfileActivationSink*/
   STDMETHODIMP OnActivated(DWORD, LANGID, REFCLSID, REFGUID, REFGUID,
                            HKL, DWORD);
 protected:
   typedef mozilla::widget::IMENotification IMENotification;
   typedef mozilla::widget::IMEState IMEState;
   typedef mozilla::widget::InputContext InputContext;
   typedef mozilla::widget::InputContextAction InputContextAction;
 public:
   static void     Initialize(void);
   static void     Terminate(void);
   static bool     ProcessRawKeyMessage(const MSG& aMsg);
   static void     ProcessMessage(nsWindowBase* aWindow, UINT aMessage,
                                  WPARAM& aWParam, LPARAM& aLParam,
                                  mozilla::widget::MSGResult& aResult);
   static void     SetIMEOpenState(bool);
   static bool     GetIMEOpenState(void);
   static void     CommitComposition(bool aDiscard)
   {
     NS_ENSURE_TRUE_VOID(sTsfTextStore);
     sTsfTextStore->CommitCompositionInternal(aDiscard);
   }
   static void SetInputContext(nsWindowBase* aWidget,
                               const InputContext& aContext,
                               const InputContextAction& aAction);
   static nsresult OnFocusChange(bool aGotFocus,
                                 nsWindowBase* aFocusedWidget,
                                 IMEState::Enabled aIMEEnabled);
   static nsresult OnTextChange(const IMENotification& aIMENotification)
   {
     NS_ENSURE_TRUE(sTsfTextStore, NS_ERROR_NOT_AVAILABLE);
     return sTsfTextStore->OnTextChangeInternal(aIMENotification);
   }
   static nsresult OnSelectionChange(void)
   {
     NS_ENSURE_TRUE(sTsfTextStore, NS_ERROR_NOT_AVAILABLE);
     return sTsfTextStore->OnSelectionChangeInternal();
   }
   static nsresult OnLayoutChange()
   {
     NS_ENSURE_TRUE(sTsfTextStore, NS_ERROR_NOT_AVAILABLE);
     return sTsfTextStore->OnLayoutChangeInternal();
   }
   static nsIMEUpdatePreference GetIMEUpdatePreference();
   // Returns the address of the pointer so that the TSF automatic test can
   // replace the system object with a custom implementation for testing.
   static void* GetNativeData(uint32_t aDataType)
   {
     switch (aDataType) {
       case NS_NATIVE_TSF_THREAD_MGR:
         Initialize(); // Apply any previous changes
         return static_cast<void*>(&sTsfThreadMgr);
       case NS_NATIVE_TSF_CATEGORY_MGR:
         return static_cast<void*>(&sCategoryMgr);
       case NS_NATIVE_TSF_DISPLAY_ATTR_MGR:
         return static_cast<void*>(&sDisplayAttrMgr);
       default:
         return nullptr;
     }
   }
   static ITfMessagePump* GetMessagePump()
   {
     return sMessagePump;
   }
   static void*    GetTextStore()
   {
     return static_cast<void*>(sTsfTextStore);
   }
   static bool     ThinksHavingFocus()
   {
     return (sTsfTextStore && sTsfTextStore->mContext);
   }
   static bool     IsInTSFMode()
   {
     return sTsfThreadMgr != nullptr;
   }
   static bool     IsComposing()
   {
     return (sTsfTextStore && sTsfTextStore->mComposition.IsComposing());
   }
   static bool     IsComposingOn(nsWindowBase* aWidget)
   {
     return (IsComposing() && sTsfTextStore->mWidget == aWidget);
   }
   static bool     IsIMM_IME()
   {
     if (!sTsfTextStore || !sTsfTextStore->EnsureInitActiveTIPKeyboard()) {
       return IsIMM_IME(::GetKeyboardLayout(0));
     }
     return sTsfTextStore->mIsIMM_IME;
   }
   static bool     IsIMM_IME(HKL aHKL)
   {
      return (::ImmGetIMEFileNameW(aHKL, nullptr, 0) > 0);
   }
 #ifdef DEBUG
   // Returns true when keyboard layout has IME (TIP).
   static bool     CurrentKeyboardLayoutHasIME();
 #endif // #ifdef DEBUG
 protected:
   nsTextStore();
   ~nsTextStore();
   bool Init(ITfThreadMgr* aThreadMgr);
   static void MarkContextAsKeyboardDisabled(ITfContext* aContext);
   static void MarkContextAsEmpty(ITfContext* aContext);
   static bool IsTIPCategoryKeyboard(REFCLSID aTextService, LANGID aLangID,
                                     REFGUID aProfile);
   static void GetTIPDescription(REFCLSID aTextService, LANGID aLangID,
                                 REFGUID aProfile, nsAString& aDescription);
   bool     Create(nsWindowBase* aWidget);
   bool     Destroy(void);
   bool     IsReadLock(DWORD aLock) const
   {
     return (TS_LF_READ == (aLock & TS_LF_READ));
   }
   bool     IsReadWriteLock(DWORD aLock) const
   {
     return (TS_LF_READWRITE == (aLock & TS_LF_READWRITE));
   }
   bool     IsReadLocked() const { return IsReadLock(mLock); }
   bool     IsReadWriteLocked() const { return IsReadWriteLock(mLock); }
   // This is called immediately after a call of OnLockGranted() of mSink.
   // Note that mLock isn't cleared yet when this is called.
   void     DidLockGranted();
   bool     GetScreenExtInternal(RECT &aScreenExt);
   // If aDispatchTextEvent is true, this method will dispatch text event if
   // this is called during IME composing.  aDispatchTextEvent should be true
   // only when this is called from SetSelection.  Because otherwise, the text
   // event should not be sent from here.
   HRESULT  SetSelectionInternal(const TS_SELECTION_ACP*,
                                 bool aDispatchTextEvent = false);
   bool     InsertTextAtSelectionInternal(const nsAString &aInsertStr,
                                          TS_TEXTCHANGE* aTextChange);
   void     CommitCompositionInternal(bool);
   nsresult OnTextChangeInternal(const IMENotification& aIMENotification);
   nsresult OnSelectionChangeInternal(void);
   HRESULT  GetDisplayAttribute(ITfProperty* aProperty,
                                ITfRange* aRange,
                                TF_DISPLAYATTRIBUTE* aResult);
   HRESULT  RestartCompositionIfNecessary(ITfRange* pRangeNew = nullptr);
   // Following methods record composing action(s) to mPendingActions.
   // They will be flushed FlushPendingActions().
   HRESULT  RecordCompositionStartAction(ITfCompositionView* aCompositionView,
                                         ITfRange* aRange,
                                         bool aPreserveSelection);
   HRESULT  RecordCompositionUpdateAction();
   HRESULT  RecordCompositionEndAction();
   // FlushPendingActions() performs pending actions recorded in mPendingActions
   // and clear it.
   void     FlushPendingActions();
   nsresult OnLayoutChangeInternal();
   HRESULT  ProcessScopeRequest(DWORD dwFlags,
                                ULONG cFilterAttrs,
                                const TS_ATTRID *paFilterAttrs);
   void     SetInputScope(const nsString& aHTMLInputType);
   // Creates native caret over our caret.  This method only works on desktop
   // application.  Otherwise, this does nothing.
   void     CreateNativeCaret();
   bool     EnsureInitActiveTIPKeyboard();
   // Holds the pointer to our current win32 or metro widget
   nsRefPtr<nsWindowBase>       mWidget;
   // Document manager for the currently focused editor
   nsRefPtr<ITfDocumentMgr>     mDocumentMgr;
   // Edit cookie associated with the current editing context
   DWORD                        mEditCookie;
   // Cookie of installing ITfInputProcessorProfileActivationSink
   DWORD                        mIPProfileCookie;
   // Cookie of installing ITfActiveLanguageProfileNotifySink
   DWORD                        mLangProfileCookie;
   // Editing context at the bottom of mDocumentMgr's context stack
   nsRefPtr<ITfContext>         mContext;
   // Currently installed notification sink
   nsRefPtr<ITextStoreACPSink>  mSink;
   // TS_AS_* mask of what events to notify
   DWORD                        mSinkMask;
   // 0 if not locked, otherwise TS_LF_* indicating the current lock
   DWORD                        mLock;
   // 0 if no lock is queued, otherwise TS_LF_* indicating the queue lock
   DWORD                        mLockQueued;
   // Active TIP keyboard's description.  If active language profile isn't TIP,
   // i.e., IMM-IME or just a keyboard layout, this is empty.
   nsString                     mActiveTIPKeyboardDescription;
   class Composition MOZ_FINAL
   {
   public:
     // nullptr if no composition is active, otherwise the current composition
     nsRefPtr<ITfCompositionView> mView;
     // Current copy of the active composition string. Only mString is
     // changed during a InsertTextAtSelection call if we have a composition.
     // mString acts as a buffer until OnUpdateComposition is called
     // and mString is flushed to editor through NS_TEXT_TEXT. This
     // way all changes are updated in batches to avoid
     // inconsistencies/artifacts.
     nsString mString;
     // The latest composition string which was dispatched by composition update
     // event.
     nsString mLastData;
     // The start of the current active composition, in ACP offsets
     LONG mStart;
     bool IsComposing() const
     {
       return (mView != nullptr);
     }
     LONG EndOffset() const
     {
       return mStart + static_cast<LONG>(mString.Length());
     }
     // Start() and End() updates the members for emulating the latest state.
     // Unless flush the pending actions, this data never matches the actual
     // content.
     void Start(ITfCompositionView* aCompositionView,
                LONG aCompositionStartOffset,
                const nsAString& aCompositionString);
     void End();
   };
   // While the document is locked, we cannot dispatch any events which cause
   // DOM events since the DOM events' handlers may modify the locked document.
   // However, even while the document is locked, TSF may queries us.
   // For that, nsTextStore modifies mComposition even while the document is
   // locked.  With mComposition, query methods can returns the text content
   // information.
   Composition mComposition;
   class Selection
   {
   public:
     Selection() : mDirty(true) {}
     bool IsDirty() const { return mDirty; };
     void MarkDirty() { mDirty = true; }
     TS_SELECTION_ACP& ACP()
     {
       MOZ_ASSERT(!mDirty);
       return mACP;
     }
     void SetSelection(const TS_SELECTION_ACP& aSelection)
     {
       mDirty = false;
       mACP = aSelection;
       // Selection end must be active in our editor.
       if (mACP.style.ase != TS_AE_START) {
         mACP.style.ase = TS_AE_END;
       }
       // We're not support interim char selection for now.
       // XXX Probably, this is necessary for supporting South Asian languages.
       mACP.style.fInterimChar = FALSE;
     }
     void SetSelection(uint32_t aStart, uint32_t aLength, bool aReversed)
     {
       mDirty = false;
       mACP.acpStart = static_cast<LONG>(aStart);
       mACP.acpEnd = static_cast<LONG>(aStart + aLength);
       mACP.style.ase = aReversed ? TS_AE_START : TS_AE_END;
       mACP.style.fInterimChar = FALSE;
     }
     bool IsCollapsed() const
     {
       MOZ_ASSERT(!mDirty);
       return (mACP.acpStart == mACP.acpEnd);
     }
     void CollapseAt(uint32_t aOffset)
     {
       mDirty = false;
       mACP.acpStart = mACP.acpEnd = static_cast<LONG>(aOffset);
       mACP.style.ase = TS_AE_END;
       mACP.style.fInterimChar = FALSE;
     }
     LONG MinOffset() const
     {
       MOZ_ASSERT(!mDirty);
       LONG min = std::min(mACP.acpStart, mACP.acpEnd);
       MOZ_ASSERT(min >= 0);
       return min;
     }
     LONG MaxOffset() const
     {
       MOZ_ASSERT(!mDirty);
       LONG max = std::max(mACP.acpStart, mACP.acpEnd);
       MOZ_ASSERT(max >= 0);
       return max;
     }
     LONG StartOffset() const
     {
       MOZ_ASSERT(!mDirty);
       MOZ_ASSERT(mACP.acpStart >= 0);
       return mACP.acpStart;
     }
     LONG EndOffset() const
     {
       MOZ_ASSERT(!mDirty);
       MOZ_ASSERT(mACP.acpEnd >= 0);
       return mACP.acpEnd;
     }
     LONG Length() const
     {
       MOZ_ASSERT(!mDirty);
       MOZ_ASSERT(mACP.acpEnd >= mACP.acpStart);
       return std::abs(mACP.acpEnd - mACP.acpStart);
     }
     bool IsReversed() const
     {
       MOZ_ASSERT(!mDirty);
       return (mACP.style.ase == TS_AE_START);
     }
     TsActiveSelEnd ActiveSelEnd() const
     {
       MOZ_ASSERT(!mDirty);
       return mACP.style.ase;
     }
     bool IsInterimChar() const
     {
       MOZ_ASSERT(!mDirty);
       return (mACP.style.fInterimChar != FALSE);
     }
   private:
     TS_SELECTION_ACP mACP;
     bool mDirty;
   };
   // Don't access mSelection directly except at calling MarkDirty().
   // Use CurrentSelection() instead.  This is marked as dirty when the
   // selection or content is changed without document lock.
   Selection mSelection;
   // Get "current selection" while the document is locked.  The selection is
   // NOT modified immediately during document lock.  The pending changes will
   // be flushed at unlocking the document.  The "current selection" is the
   // modified selection during document lock.  This is also called
   // CurrentContent() too.
   Selection& CurrentSelection();
   struct PendingAction MOZ_FINAL
   {
     enum ActionType MOZ_ENUM_TYPE(uint8_t)
     {
       COMPOSITION_START,
       COMPOSITION_UPDATE,
       COMPOSITION_END,
       SELECTION_SET
     };
     ActionType mType;
     // For compositionstart and selectionset
     LONG mSelectionStart;
     LONG mSelectionLength;
     // For compositionupdate and compositionend
     nsString mData;
     // For compositionupdate
     nsRefPtr<mozilla::TextRangeArray> mRanges;
     // For selectionset
     bool mSelectionReversed;
   };
   // Items of mPendingActions are appended when TSF tells us to need to dispatch
   // DOM composition events.  However, we cannot dispatch while the document is
   // locked because it can cause modifying the locked document.  So, the pending
   // actions should be performed when document lock is unlocked.
   nsTArray<PendingAction> mPendingActions;
   PendingAction* GetPendingCompositionUpdate()
   {
     if (!mPendingActions.IsEmpty()) {
       PendingAction& lastAction = mPendingActions.LastElement();
       if (lastAction.mType == PendingAction::COMPOSITION_UPDATE) {
         return &lastAction;
       }
     }
     PendingAction* newAction = mPendingActions.AppendElement();
     newAction->mType = PendingAction::COMPOSITION_UPDATE;
     newAction->mRanges = new mozilla::TextRangeArray();
     return newAction;
   }
   // When On*Composition() is called without document lock, we need to flush
   // the recorded actions at quitting the method.
   // AutoPendingActionAndContentFlusher class is usedful for it.
   class MOZ_STACK_CLASS AutoPendingActionAndContentFlusher MOZ_FINAL
   {
   public:
     AutoPendingActionAndContentFlusher(nsTextStore* aTextStore)
       : mTextStore(aTextStore)
     {
       MOZ_ASSERT(!mTextStore->mIsRecordingActionsWithoutLock);
       if (!mTextStore->IsReadWriteLocked()) {
         mTextStore->mIsRecordingActionsWithoutLock = true;
       }
     }
     ~AutoPendingActionAndContentFlusher()
     {
       if (!mTextStore->mIsRecordingActionsWithoutLock) {
         return;
       }
       mTextStore->FlushPendingActions();
       mTextStore->mIsRecordingActionsWithoutLock = false;
     }
   private:
     AutoPendingActionAndContentFlusher() {}
     nsRefPtr<nsTextStore> mTextStore;
   };
   class Content MOZ_FINAL
   {
   public:
     Content(nsTextStore::Composition& aComposition,
             nsTextStore::Selection& aSelection) :
       mComposition(aComposition), mSelection(aSelection)
     {
       Clear();
     }
     void Clear()
     {
       mText.Truncate();
       mInitialized = false;
     }
     bool IsInitialized() const { return mInitialized; }
     void Init(const nsAString& aText)
     {
       mText = aText;
       mMinTextModifiedOffset = NOT_MODIFIED;
       mInitialized = true;
     }
     const nsDependentSubstring GetSelectedText() const;
     const nsDependentSubstring GetSubstring(uint32_t aStart,
                                             uint32_t aLength) const;
     void ReplaceSelectedTextWith(const nsAString& aString);
     void ReplaceTextWith(LONG aStart, LONG aLength, const nsAString& aString);
     void StartComposition(ITfCompositionView* aCompositionView,
                           const PendingAction& aCompStart,
                           bool aPreserveSelection);
     void EndComposition(const PendingAction& aCompEnd);
     const nsString& Text() const
     {
       MOZ_ASSERT(mInitialized);
       return mText;
     }
     // Returns true if layout of the character at the aOffset has not been
     // calculated.
     bool IsLayoutChangedAfter(uint32_t aOffset) const
     {
       return mInitialized && (mMinTextModifiedOffset < aOffset);
     }
     // Returns true if layout of the content has been changed, i.e., the new
     // layout has not been calculated.
     bool IsLayoutChanged() const
     {
       return mInitialized && (mMinTextModifiedOffset != NOT_MODIFIED);
     }
     nsTextStore::Composition& Composition() { return mComposition; }
     nsTextStore::Selection& Selection() { return mSelection; }
   private:
     nsString mText;
     nsTextStore::Composition& mComposition;
     nsTextStore::Selection& mSelection;
     // The minimum offset of modified part of the text.
     enum MOZ_ENUM_TYPE(uint32_t)
     {
       NOT_MODIFIED = UINT32_MAX
     };
     uint32_t mMinTextModifiedOffset;
     bool mInitialized;
   };
   // mContent caches "current content" of the document ONLY while the document
   // is locked.  I.e., the content is cleared at unlocking the document since
   // we need to reduce the memory usage.  This is initialized by
   // CurrentContent() automatically, so, don't access this member directly
   // except at calling Clear(), IsInitialized(), IsLayoutChangedAfter() or
   // IsLayoutChanged().
   Content mContent;
   Content& CurrentContent();
   // The input scopes for this context, defaults to IS_DEFAULT.
   nsTArray<InputScope>         mInputScopes;
   bool                         mInputScopeDetected;
   bool                         mInputScopeRequested;
   // If edit actions are being recorded without document lock, this is true.
   // Otherwise, false.
   bool                         mIsRecordingActionsWithoutLock;
   // During recording actions, we shouldn't call mSink->OnSelectionChange()
   // because it may cause TSF request new lock.  This is a problem if the
   // selection change is caused by a call of On*Composition() without document
   // lock since RequestLock() tries to flush the pending actions again (which
   // are flushing).  Therefore, OnSelectionChangeInternal() sets this true
   // during recoding actions and then, RequestLock() will call
   // mSink->OnSelectionChange() after mLock becomes 0.
   bool                         mPendingOnSelectionChange;
   // If GetTextExt() or GetACPFromPoint() is called and the layout hasn't been
   // calculated yet, these methods return TS_E_NOLAYOUT.  Then, RequestLock()
   // will call mSink->OnLayoutChange() and
   // ITfContextOwnerServices::OnLayoutChange() after the layout is fixed and
   // the document is unlocked.
   bool                         mPendingOnLayoutChange;
   // While there is native caret, this is true.  Otherwise, false.
   bool                         mNativeCaretIsCreated;
   // True if current IME is implemented with IMM.
   bool                         mIsIMM_IME;
   // True if OnActivated() is already called
   bool                         mOnActivatedCalled;
   // TSF thread manager object for the current application
   static ITfThreadMgr*  sTsfThreadMgr;
   // sMessagePump is QI'ed from sTsfThreadMgr
   static ITfMessagePump* sMessagePump;
   // sKeystrokeMgr is QI'ed from sTsfThreadMgr
   static ITfKeystrokeMgr* sKeystrokeMgr;
   // TSF display attribute manager
   static ITfDisplayAttributeMgr* sDisplayAttrMgr;
   // TSF category manager
   static ITfCategoryMgr* sCategoryMgr;
   // TSF client ID for the current application
   static DWORD          sTsfClientId;
   // Current text store. Currently only ONE nsTextStore instance is ever used,
   // although Create is called when an editor is focused and Destroy called
   // when the focused editor is blurred.
   static nsTextStore*   sTsfTextStore;
   // For IME (keyboard) disabled state:
   static ITfDocumentMgr* sTsfDisabledDocumentMgr;
   static ITfContext* sTsfDisabledContext;
   static ITfInputProcessorProfiles* sInputProcessorProfiles;
   // Enables/Disables hack for specific TIP.
   static bool sCreateNativeCaretForATOK;
   // Message the Tablet Input Panel uses to flush text during blurring.
   // See comments in Destroy
   static UINT           sFlushTIPInputMessage;
 private:
   ULONG                       mRefCnt;
 };
 #endif /*NSTEXTSTORE_H_*/

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widget/windows/nsTextStore.h@b8a032363ba2 (annotated)

widget/windows/nsTextStore.h