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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 mozilla_TextInputListener_h
#define mozilla_TextInputListener_h
#include "mozilla/WeakPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIDOMEventListener.h"
#include "nsStringFwd.h"
#include "nsWeakReference.h"
class nsIFrame;
class nsTextControlFrame;
namespace mozilla {
class TextControlElement;
class TextControlState;
namespace dom {
class Selection;
} // namespace dom
class TextInputListener final : public nsIDOMEventListener,
public nsSupportsWeakReference {
public:
explicit TextInputListener(TextControlElement* aTextControlElement);
void SetFrame(nsIFrame* aTextControlFrame) { mFrame = aTextControlFrame; }
void SettingValue(bool aValue) { mSettingValue = aValue; }
void SetValueChanged(bool aSetValueChanged) {
mSetValueChanged = aSetValueChanged;
}
/**
* aFrame is an optional pointer to our frame, if not passed the method will
* use mFrame to compute it lazily.
*/
void HandleValueChanged(nsTextControlFrame* aFrame = nullptr);
/**
* OnEditActionHandled() is called when the editor handles each edit action.
*/
MOZ_CAN_RUN_SCRIPT MOZ_MUST_USE nsresult
OnEditActionHandled(TextEditor& aTextEditor);
/**
* OnSelectionChange() is called when selection is changed in the editor.
*/
MOZ_CAN_RUN_SCRIPT
void OnSelectionChange(dom::Selection& aSelection, int16_t aReason);
/**
* Start to listen or end listening to selection change in the editor.
*/
void StartToListenToSelectionChange() { mListeningToSelectionChange = true; }
void EndListeningToSelectionChange() { mListeningToSelectionChange = false; }
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(TextInputListener,
nsIDOMEventListener)
NS_DECL_NSIDOMEVENTLISTENER
protected:
virtual ~TextInputListener() = default;
nsresult UpdateTextInputCommands(const nsAString& aCommandsToUpdate,
dom::Selection* aSelection = nullptr,
int16_t aReason = 0);
protected:
nsIFrame* mFrame;
TextControlElement* const mTxtCtrlElement;
WeakPtr<TextControlState> const mTextControlState;
bool mSelectionWasCollapsed;
/**
* Whether we had undo items or not the last time we got EditAction()
* notification (when this state changes we update undo and redo menus)
*/
bool mHadUndoItems;
/**
* Whether we had redo items or not the last time we got EditAction()
* notification (when this state changes we update undo and redo menus)
*/
bool mHadRedoItems;
/**
* Whether we're in the process of a SetValue call, and should therefore
* refrain from calling OnValueChanged.
*/
bool mSettingValue;
/**
* Whether we are in the process of a SetValue call that doesn't want
* |SetValueChanged| to be called.
*/
bool mSetValueChanged;
/**
* Whether we're listening to selection change in the editor.
*/
bool mListeningToSelectionChange;
};
} // namespace mozilla
#endif // #ifndef mozilla_TextInputListener_h