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+/* Communication module for Android terminals. -*- c-file-style: "GNU" -*-
+
+Copyright (C) 2023 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
+
+package org.gnu.emacs;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import android.content.Context;
+import android.content.Intent;
+
+import android.os.Bundle;
+
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+
+import android.widget.PopupMenu;
+
+/* Context menu implementation. This object is built from JNI and
+ describes a menu hiearchy. Then, `inflate' can turn it into an
+ Android menu, which can be turned into a popup (or other kind of)
+ menu. */
+
+public class EmacsContextMenu
+{
+ private class Item
+ {
+ public int itemID;
+ public String itemName;
+ public EmacsContextMenu subMenu;
+ public boolean isEnabled;
+ };
+
+ public List<Item> menuItems;
+ public String title;
+ private EmacsContextMenu parent;
+
+ /* Create a context menu with no items inside and the title TITLE,
+ which may be NULL. */
+
+ public static EmacsContextMenu
+ createContextMenu (String title)
+ {
+ EmacsContextMenu menu;
+
+ menu = new EmacsContextMenu ();
+ menu.menuItems = new ArrayList<Item> ();
+ menu.title = title;
+
+ return menu;
+ }
+
+ /* Add a normal menu item to the context menu with the id ITEMID and
+ the name ITEMNAME. Enable it if ISENABLED, else keep it
+ disabled. */
+
+ public void
+ addItem (int itemID, String itemName, boolean isEnabled)
+ {
+ Item item;
+
+ item = new Item ();
+ item.itemID = itemID;
+ item.itemName = itemName;
+ item.isEnabled = isEnabled;
+
+ menuItems.add (item);
+ }
+
+ /* Create a disabled menu item with the name ITEMNAME. */
+
+ public void
+ addPane (String itemName)
+ {
+ Item item;
+
+ item = new Item ();
+ item.itemName = itemName;
+
+ menuItems.add (item);
+ }
+
+ /* Add a submenu to the context menu with the specified title and
+ item name. */
+
+ public EmacsContextMenu
+ addSubmenu (String itemName, String title)
+ {
+ EmacsContextMenu submenu;
+ Item item;
+
+ item = new Item ();
+ item.itemID = 0;
+ item.itemName = itemName;
+ item.subMenu = createContextMenu (title);
+ item.subMenu.parent = this;
+
+ menuItems.add (item);
+ return item.subMenu;
+ }
+
+ /* Add the contents of this menu to MENU. */
+
+ private void
+ inflateMenuItems (Menu menu)
+ {
+ Intent intent;
+ MenuItem menuItem;
+ Menu submenu;
+
+ for (Item item : menuItems)
+ {
+ if (item.subMenu != null)
+ {
+ /* This is a submenu. Create the submenu and add the
+ contents of the menu to it. */
+ submenu = menu.addSubMenu (item.itemName);
+ inflateMenuItems (submenu);
+ }
+ else
+ {
+ menuItem = menu.add (item.itemName);
+
+ /* If the item ID is zero, then disable the item. */
+ if (item.itemID == 0 || !item.isEnabled)
+ menuItem.setEnabled (false);
+ }
+ }
+ }
+
+ /* Enter the items in this context menu to MENU. Create each menu
+ item with an Intent containing a Bundle, where the key
+ "emacs:menu_item_hi" maps to the high 16 bits of the
+ corresponding item ID, and the key "emacs:menu_item_low" maps to
+ the low 16 bits of the item ID. */
+
+ public void
+ expandTo (Menu menu)
+ {
+ inflateMenuItems (menu);
+ }
+
+ /* Return the parent or NULL. */
+
+ public EmacsContextMenu
+ parent ()
+ {
+ return parent;
+ }
+
+ /* Like display, but does the actual work and runs in the main
+ thread. */
+
+ private boolean
+ display1 (EmacsWindow window, int xPosition, int yPosition)
+ {
+ return window.view.popupMenu (this, xPosition, yPosition);
+ }
+
+ /* Display this context menu on WINDOW, at xPosition and
+ yPosition. */
+
+ public boolean
+ display (final EmacsWindow window, final int xPosition,
+ final int yPosition)
+ {
+ Runnable runnable;
+ final Holder<Boolean> rc;
+
+ rc = new Holder<Boolean> ();
+
+ runnable = new Runnable () {
+ @Override
+ public void
+ run ()
+ {
+ synchronized (this)
+ {
+ rc.thing = display1 (window, xPosition, yPosition);
+ notify ();
+ }
+ }
+ };
+
+ try
+ {
+ runnable.wait ();
+ }
+ catch (InterruptedException e)
+ {
+ EmacsNative.emacsAbort ();
+ }
+
+ return rc.thing;
+ }
+};