michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=2 sw=2 et tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_IMEContentObserver_h_
michael@0: #define mozilla_IMEContentObserver_h_
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsCycleCollectionParticipant.h"
michael@0: #include "nsIDocShell.h" // XXX Why does only this need to be included here?
michael@0: #include "nsIReflowObserver.h"
michael@0: #include "nsISelectionListener.h"
michael@0: #include "nsIScrollObserver.h"
michael@0: #include "nsIWidget.h" // for nsIMEUpdatePreference
michael@0: #include "nsStubMutationObserver.h"
michael@0: #include "nsWeakReference.h"
michael@0: 
michael@0: class nsIContent;
michael@0: class nsINode;
michael@0: class nsISelection;
michael@0: class nsPresContext;
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: class EventStateManager;
michael@0: 
michael@0: // IMEContentObserver notifies widget of any text and selection changes
michael@0: // in the currently focused editor
michael@0: class IMEContentObserver MOZ_FINAL : public nsISelectionListener,
michael@0:                                      public nsStubMutationObserver,
michael@0:                                      public nsIReflowObserver,
michael@0:                                      public nsIScrollObserver,
michael@0:                                      public nsSupportsWeakReference
michael@0: {
michael@0: public:
michael@0:   IMEContentObserver();
michael@0: 
michael@0:   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
michael@0:   NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(IMEContentObserver,
michael@0:                                            nsISelectionListener)
michael@0:   NS_DECL_NSISELECTIONLISTENER
michael@0:   NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
michael@0:   NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
michael@0:   NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
michael@0:   NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
michael@0:   NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTEWILLCHANGE
michael@0:   NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
michael@0:   NS_DECL_NSIREFLOWOBSERVER
michael@0: 
michael@0:   // nsIScrollObserver
michael@0:   virtual void ScrollPositionChanged() MOZ_OVERRIDE;
michael@0: 
michael@0:   void Init(nsIWidget* aWidget, nsPresContext* aPresContext,
michael@0:             nsIContent* aContent);
michael@0:   void Destroy();
michael@0:   /**
michael@0:    * IMEContentObserver is stored by EventStateManager during observing.
michael@0:    * DisconnectFromEventStateManager() is called when EventStateManager stops
michael@0:    * storing the instance.
michael@0:    */
michael@0:   void DisconnectFromEventStateManager();
michael@0:   bool IsManaging(nsPresContext* aPresContext, nsIContent* aContent);
michael@0:   bool IsEditorHandlingEventForComposition() const;
michael@0:   bool KeepAliveDuringDeactive() const
michael@0:   {
michael@0:     return mUpdatePreference.WantDuringDeactive();
michael@0:   }
michael@0:   nsIWidget* GetWidget() const { return mWidget; }
michael@0:   nsresult GetSelectionAndRoot(nsISelection** aSelection,
michael@0:                                nsIContent** aRoot) const;
michael@0: 
michael@0: private:
michael@0:   void NotifyContentAdded(nsINode* aContainer, int32_t aStart, int32_t aEnd);
michael@0:   void ObserveEditableNode();
michael@0: 
michael@0:   nsCOMPtr<nsIWidget> mWidget;
michael@0:   nsCOMPtr<nsISelection> mSelection;
michael@0:   nsCOMPtr<nsIContent> mRootContent;
michael@0:   nsCOMPtr<nsINode> mEditableNode;
michael@0:   nsCOMPtr<nsIDocShell> mDocShell;
michael@0: 
michael@0:   EventStateManager* mESM;
michael@0: 
michael@0:   nsIMEUpdatePreference mUpdatePreference;
michael@0:   uint32_t mPreAttrChangeLength;
michael@0: };
michael@0: 
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // mozilla_IMEContentObserver_h_