зеркало из https://github.com/mozilla/gecko-dev.git
119 строки
3.2 KiB
C++
119 строки
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_TextInputListener_h
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#define mozilla_TextInputListener_h
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#include "nsCycleCollectionParticipant.h"
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#include "nsIDOMEventListener.h"
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#include "nsStringFwd.h"
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#include "nsWeakReference.h"
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class nsIFrame;
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class nsITextControlElement;
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class nsTextControlFrame;
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namespace mozilla {
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namespace dom {
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class Selection;
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} // namespace dom
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class TextInputListener final : public nsIDOMEventListener
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, public nsSupportsWeakReference
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{
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public:
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explicit TextInputListener(nsITextControlElement* aTextControlElement);
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void SetFrame(nsIFrame* aTextControlFrame)
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{
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mFrame = aTextControlFrame;
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}
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void SettingValue(bool aValue)
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{
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mSettingValue = aValue;
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}
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void SetValueChanged(bool aSetValueChanged)
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{
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mSetValueChanged = aSetValueChanged;
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}
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/**
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* aFrame is an optional pointer to our frame, if not passed the method will
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* use mFrame to compute it lazily.
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*/
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void HandleValueChanged(nsTextControlFrame* aFrame = nullptr);
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/**
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* OnEditActionHandled() is called when the editor handles each edit action.
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*/
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void OnEditActionHandled();
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/**
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* OnSelectionChange() is called when selection is changed in the editor.
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*/
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void OnSelectionChange(Selection& aSelection, int16_t aReason);
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/**
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* Start to listen or end listening to selection change in the editor.
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*/
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void StartToListenToSelectionChange()
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{
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mListeningToSelectionChange = true;
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}
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void EndListeningToSelectionChange()
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{
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mListeningToSelectionChange = false;
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}
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(TextInputListener,
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nsIDOMEventListener)
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NS_DECL_NSIDOMEVENTLISTENER
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protected:
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virtual ~TextInputListener() = default;
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nsresult UpdateTextInputCommands(const nsAString& aCommandsToUpdate,
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dom::Selection* aSelection = nullptr,
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int16_t aReason = 0);
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protected:
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nsIFrame* mFrame;
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nsITextControlElement* const mTxtCtrlElement;
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bool mSelectionWasCollapsed;
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/**
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* Whether we had undo items or not the last time we got EditAction()
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* notification (when this state changes we update undo and redo menus)
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*/
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bool mHadUndoItems;
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/**
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* Whether we had redo items or not the last time we got EditAction()
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* notification (when this state changes we update undo and redo menus)
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*/
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bool mHadRedoItems;
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/**
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* Whether we're in the process of a SetValue call, and should therefore
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* refrain from calling OnValueChanged.
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*/
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bool mSettingValue;
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/**
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* Whether we are in the process of a SetValue call that doesn't want
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* |SetValueChanged| to be called.
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*/
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bool mSetValueChanged;
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/**
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* Whether we're listening to selection change in the editor.
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*/
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bool mListeningToSelectionChange;
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};
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} // namespace mozilla
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#endif // #ifndef mozilla_TextInputListener_h
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