1 files changed, 128 insertions, 0 deletions
diff --git a/editor/libeditor/EditorEventListener.h b/editor/libeditor/EditorEventListener.h
new file mode 100644
index 0000000000..33af96f4ba
--- /dev/null
+++ b/editor/libeditor/EditorEventListener.h
@@ -0,0 +1,128 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 EditorEventListener_h
+#define EditorEventListener_h
+
+#include "EditorForwards.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/EventForwards.h"
+#include "nsCOMPtr.h"
+#include "nsError.h"
+#include "nsIDOMEventListener.h"
+#include "nsISupportsImpl.h"
+#include "nscore.h"
+
+class nsCaret;
+class nsIContent;
+class nsPresContext;
+
+// X.h defines KeyPress
+#ifdef KeyPress
+#  undef KeyPress
+#endif
+
+#ifdef XP_WIN
+// On Windows, we support switching the text direction by pressing Ctrl+Shift
+#  define HANDLE_NATIVE_TEXT_DIRECTION_SWITCH
+#endif
+
+namespace mozilla {
+class PresShell;
+namespace dom {
+class DragEvent;
+class MouseEvent;
+}  // namespace dom
+
+class EditorEventListener : public nsIDOMEventListener {
+ public:
+  EditorEventListener();
+
+  virtual nsresult Connect(EditorBase* aEditorBase);
+
+  virtual void Disconnect();
+
+  /**
+   * DetachedFromEditor() returns true if editor was detached.
+   * Otherwise, false.
+   */
+  [[nodiscard]] bool DetachedFromEditor() const;
+
+  NS_DECL_ISUPPORTS
+
+  // nsIDOMEventListener
+  MOZ_CAN_RUN_SCRIPT NS_IMETHOD HandleEvent(dom::Event* aEvent) override;
+
+ protected:
+  virtual ~EditorEventListener();
+
+  nsresult InstallToEditor();
+  void UninstallFromEditor();
+
+#ifdef HANDLE_NATIVE_TEXT_DIRECTION_SWITCH
+  nsresult KeyDown(const WidgetKeyboardEvent* aKeyboardEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult KeyUp(const WidgetKeyboardEvent* aKeyboardEvent);
+#endif
+  MOZ_CAN_RUN_SCRIPT nsresult KeyPress(WidgetKeyboardEvent* aKeyboardEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult
+  HandleChangeComposition(WidgetCompositionEvent* aCompositionEvent);
+  nsresult HandleStartComposition(WidgetCompositionEvent* aCompositionEvent);
+  MOZ_CAN_RUN_SCRIPT void HandleEndComposition(
+      WidgetCompositionEvent* aCompositionEvent);
+  MOZ_CAN_RUN_SCRIPT virtual nsresult MouseDown(dom::MouseEvent* aMouseEvent);
+  MOZ_CAN_RUN_SCRIPT virtual nsresult MouseUp(dom::MouseEvent* aMouseEvent) {
+    return NS_OK;
+  }
+  MOZ_CAN_RUN_SCRIPT virtual nsresult MouseClick(
+      WidgetMouseEvent* aMouseClickEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult Focus(const InternalFocusEvent& aFocusEvent);
+  nsresult Blur(const InternalFocusEvent& aBlurEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult DragOverOrDrop(dom::DragEvent* aDragEvent);
+  nsresult DragLeave(dom::DragEvent* aDragEvent);
+
+  void RefuseToDropAndHideCaret(dom::DragEvent* aDragEvent);
+  bool DragEventHasSupportingData(dom::DragEvent* aDragEvent) const;
+  MOZ_CAN_RUN_SCRIPT bool CanInsertAtDropPosition(dom::DragEvent* aDragEvent);
+  void InitializeDragDropCaret();
+  void CleanupDragDropCaret();
+  PresShell* GetPresShell() const;
+  nsPresContext* GetPresContext() const;
+  // Returns true if IME consumes the mouse event.
+  MOZ_CAN_RUN_SCRIPT bool NotifyIMEOfMouseButtonEvent(
+      WidgetMouseEvent* aMouseEvent);
+  bool EditorHasFocus();
+  bool IsFileControlTextBox();
+  bool ShouldHandleNativeKeyBindings(WidgetKeyboardEvent* aKeyboardEvent);
+
+  /**
+   * DetachedFromEditorOrDefaultPrevented() returns true if editor was detached
+   * and/or the event was consumed.  Otherwise, i.e., attached editor can
+   * handle the event, returns true.
+   */
+  bool DetachedFromEditorOrDefaultPrevented(WidgetEvent* aEvent) const;
+
+  /**
+   * EnsureCommitComposition() requests to commit composition if there is.
+   * Returns false if the editor is detached from the listener, i.e.,
+   * impossible to continue to handle the event.  Otherwise, true.
+   */
+  [[nodiscard]] bool EnsureCommitComposition();
+
+  EditorBase* mEditorBase;  // weak
+  RefPtr<nsCaret> mCaret;
+  bool mCommitText;
+  bool mInTransaction;
+  bool mMouseDownOrUpConsumedByIME;
+#ifdef HANDLE_NATIVE_TEXT_DIRECTION_SWITCH
+  bool mHaveBidiKeyboards;
+  bool mShouldSwitchTextDirection;
+  bool mSwitchToRTL;
+#endif
+};
+
+}  // namespace mozilla
+
+#endif  // #ifndef EditorEventListener_h