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Diffstat (limited to 'dom/html/TextInputListener.h')
-rw-r--r-- | dom/html/TextInputListener.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/dom/html/TextInputListener.h b/dom/html/TextInputListener.h new file mode 100644 index 0000000000..6b923e00be --- /dev/null +++ b/dom/html/TextInputListener.h @@ -0,0 +1,109 @@ +/* -*- 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; +class TextEditor; + +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(TextEditor&); + + /** + * OnEditActionHandled() is called when the editor handles each edit action. + */ + [[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult OnEditActionHandled(TextEditor&); + + /** + * 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 |