1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/events/IMEContentObserver.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,93 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=2 sw=2 et tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef mozilla_IMEContentObserver_h_
1.11 +#define mozilla_IMEContentObserver_h_
1.12 +
1.13 +#include "mozilla/Attributes.h"
1.14 +#include "nsCOMPtr.h"
1.15 +#include "nsCycleCollectionParticipant.h"
1.16 +#include "nsIDocShell.h" // XXX Why does only this need to be included here?
1.17 +#include "nsIReflowObserver.h"
1.18 +#include "nsISelectionListener.h"
1.19 +#include "nsIScrollObserver.h"
1.20 +#include "nsIWidget.h" // for nsIMEUpdatePreference
1.21 +#include "nsStubMutationObserver.h"
1.22 +#include "nsWeakReference.h"
1.23 +
1.24 +class nsIContent;
1.25 +class nsINode;
1.26 +class nsISelection;
1.27 +class nsPresContext;
1.28 +
1.29 +namespace mozilla {
1.30 +
1.31 +class EventStateManager;
1.32 +
1.33 +// IMEContentObserver notifies widget of any text and selection changes
1.34 +// in the currently focused editor
1.35 +class IMEContentObserver MOZ_FINAL : public nsISelectionListener,
1.36 + public nsStubMutationObserver,
1.37 + public nsIReflowObserver,
1.38 + public nsIScrollObserver,
1.39 + public nsSupportsWeakReference
1.40 +{
1.41 +public:
1.42 + IMEContentObserver();
1.43 +
1.44 + NS_DECL_CYCLE_COLLECTING_ISUPPORTS
1.45 + NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(IMEContentObserver,
1.46 + nsISelectionListener)
1.47 + NS_DECL_NSISELECTIONLISTENER
1.48 + NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
1.49 + NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
1.50 + NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
1.51 + NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
1.52 + NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTEWILLCHANGE
1.53 + NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
1.54 + NS_DECL_NSIREFLOWOBSERVER
1.55 +
1.56 + // nsIScrollObserver
1.57 + virtual void ScrollPositionChanged() MOZ_OVERRIDE;
1.58 +
1.59 + void Init(nsIWidget* aWidget, nsPresContext* aPresContext,
1.60 + nsIContent* aContent);
1.61 + void Destroy();
1.62 + /**
1.63 + * IMEContentObserver is stored by EventStateManager during observing.
1.64 + * DisconnectFromEventStateManager() is called when EventStateManager stops
1.65 + * storing the instance.
1.66 + */
1.67 + void DisconnectFromEventStateManager();
1.68 + bool IsManaging(nsPresContext* aPresContext, nsIContent* aContent);
1.69 + bool IsEditorHandlingEventForComposition() const;
1.70 + bool KeepAliveDuringDeactive() const
1.71 + {
1.72 + return mUpdatePreference.WantDuringDeactive();
1.73 + }
1.74 + nsIWidget* GetWidget() const { return mWidget; }
1.75 + nsresult GetSelectionAndRoot(nsISelection** aSelection,
1.76 + nsIContent** aRoot) const;
1.77 +
1.78 +private:
1.79 + void NotifyContentAdded(nsINode* aContainer, int32_t aStart, int32_t aEnd);
1.80 + void ObserveEditableNode();
1.81 +
1.82 + nsCOMPtr<nsIWidget> mWidget;
1.83 + nsCOMPtr<nsISelection> mSelection;
1.84 + nsCOMPtr<nsIContent> mRootContent;
1.85 + nsCOMPtr<nsINode> mEditableNode;
1.86 + nsCOMPtr<nsIDocShell> mDocShell;
1.87 +
1.88 + EventStateManager* mESM;
1.89 +
1.90 + nsIMEUpdatePreference mUpdatePreference;
1.91 + uint32_t mPreAttrChangeLength;
1.92 +};
1.93 +
1.94 +} // namespace mozilla
1.95 +
1.96 +#endif // mozilla_IMEContentObserver_h_
