Update Android port

* doc/emacs/android.texi (Android Fonts): Document that TTC
format fonts are now supported.
* doc/emacs/emacs.texi (Top): Fix menus.
* doc/lispref/commands.texi (Touchscreen Events)
(Key Sequence Input): Document changes to touchscreen events.
* etc/DEBUG: Describe how to debug 64 bit binaries on Android.

* java/org/gnu/emacs/EmacsCopyArea.java (perform): Explicitly
recycle copy bitmap.
* java/org/gnu/emacs/EmacsDialog.java (EmacsDialog): New class.
* java/org/gnu/emacs/EmacsDrawRectangle.java (perform): Use 5
point PolyLine like X, because Android behaves like Postscript
on some devices and X elsewhere.
* java/org/gnu/emacs/EmacsFillRectangle.java (perform):
Explicitly recycle copy bitmap.
* java/org/gnu/emacs/EmacsPixmap.java (destroyHandle):
Explicitly recycle bitmap and GC if it is big.
* java/org/gnu/emacs/EmacsView.java (EmacsView): Make
`bitmapDirty' a boolean.
(handleDirtyBitmap): Reimplement in terms of that boolean.
Explicitly recycle old bitmap and GC.
(onLayout): Fix lock up.
(onDetachedFromWindow): Recycle bitmap and GC.

* java/org/gnu/emacs/EmacsWindow.java (requestViewLayout):
Update call to explicitlyDirtyBitmap.

* src/android.c (android_run_select_thread, android_select):
Really fix android_select.
(android_build_jstring): New function.
* src/android.h: Update prototypes.
* src/androidmenu.c (android_process_events_for_menu): Totally
unblock input before process_pending_signals.
(android_menu_show): Remove redundant unblock_input and
debugging code.
(struct android_emacs_dialog, android_init_emacs_dialog)
(android_dialog_show, android_popup_dialog, init_androidmenu):
Implement popup dialogs on Android.

* src/androidterm.c (android_update_tools)
(handle_one_android_event, android_frame_up_to_date): Allow
tapping tool bar items.
(android_create_terminal): Add dialog hook.
(android_wait_for_event): Adjust call to android_select.
* src/androidterm.h (struct android_touch_point): New field
`tool_bar_p'.
* src/keyboard.c (read_key_sequence, head_table)
(syms_of_keyboard): Prefix touchscreen events with posn.
* src/keyboard.h (EVENT_HEAD): Handle touchscreen events.
* src/process.c (wait_reading_process_output): Adjust call to
android_select.
* src/sfnt.c (sfnt_read_table_directory): If the first long
turns out to be ttcf, return -1.
(sfnt_read_ttc_header): New function.
(main): Test TTC support.

* src/sfnt.h (struct sfnt_ttc_header): New structure.
(enum sfnt_ttc_tag): New enum.

* src/sfntfont-android.c (struct
sfntfont_android_scanline_buffer): New structure.
(GET_SCANLINE_BUFFER): New macro.  Try to avoid so much malloc
upon accessing the scanline buffer.
(sfntfont_android_put_glyphs): Do not use SAFE_ALLOCA to
allocate the scaline buffer.
(Fandroid_enumerate_fonts): Enumerate ttc fonts too.

* src/sfntfont.c (struct sfnt_font_desc): New field `offset'.
(sfnt_enum_font_1): Split out enumeration code from
sfnt_enum_font.
(sfnt_enum_font): Read TTC tables and enumerate each font
therein.
(sfntfont_open): Seek to the offset specified.

* xcompile/Makefile.in (maintainer-clean): Fix depends here.

1 files changed, 333 insertions, 0 deletions

diff --git a/java/org/gnu/emacs/EmacsDialog.java b/java/org/gnu/emacs/EmacsDialog.java
new file mode 100644
index 00000000000..5bc8efa5978
--- /dev/null
+++ b/java/org/gnu/emacs/EmacsDialog.java
@@ -0,0 +1,333 @@
+/* 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.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Context;
+import android.util.Log;
+
+import android.widget.Button;
+import android.widget.LinearLayout;
+import android.widget.FrameLayout;
+
+import android.view.View;
+import android.view.ViewGroup;
+
+/* Toolkit dialog implementation.  This object is built from JNI and
+   describes a single alert dialog.  Then, `inflate' turns it into
+   AlertDialog.  */
+
+public class EmacsDialog implements DialogInterface.OnDismissListener
+{
+  private static final String TAG = "EmacsDialog";
+
+  /* List of buttons in this dialog.  */
+  private List<EmacsButton> buttons;
+
+  /* Dialog title.  */
+  private String title;
+
+  /* Dialog text.  */
+  private String text;
+
+  /* Whether or not a selection has already been made.  */
+  private boolean wasButtonClicked;
+
+  /* Dialog to dismiss after click.  */
+  private AlertDialog dismissDialog;
+
+  private class EmacsButton implements View.OnClickListener,
+			    DialogInterface.OnClickListener
+  {
+    /* Name of this button.  */
+    public String name;
+
+    /* ID of this button.  */
+    public int id;
+
+    /* Whether or not the button is enabled.  */
+    public boolean enabled;
+
+    @Override
+    public void
+    onClick (View view)
+    {
+      Log.d (TAG, "onClicked " + this);
+
+      wasButtonClicked = true;
+      EmacsNative.sendContextMenu ((short) 0, id);
+      dismissDialog.dismiss ();
+    }
+
+    @Override
+    public void
+    onClick (DialogInterface dialog, int which)
+    {
+      Log.d (TAG, "onClicked " + this);
+
+      wasButtonClicked = true;
+      EmacsNative.sendContextMenu ((short) 0, id);
+    }
+  };
+
+  /* Create a popup dialog with the title TITLE and the text TEXT.
+     TITLE may be NULL.  */
+
+  public static EmacsDialog
+  createDialog (String title, String text)
+  {
+    EmacsDialog dialog;
+
+    dialog = new EmacsDialog ();
+    dialog.buttons = new ArrayList<EmacsButton> ();
+    dialog.title = title;
+    dialog.text = text;
+
+    return dialog;
+  }
+
+  /* Add a button named NAME, with the identifier ID.  If DISABLE,
+     disable the button.  */
+
+  public void
+  addButton (String name, int id, boolean disable)
+  {
+    EmacsButton button;
+
+    button = new EmacsButton ();
+    button.name = name;
+    button.id = id;
+    button.enabled = !disable;
+    buttons.add (button);
+  }
+
+  /* Turn this dialog into an AlertDialog for the specified
+     CONTEXT.
+
+     Upon a button being selected, the dialog will send an
+     ANDROID_CONTEXT_MENU event with the id of that button.
+
+     Upon the dialog being dismissed, an ANDROID_CONTEXT_MENU event
+     will be sent with an id of 0.  */
+
+  public AlertDialog
+  toAlertDialog (Context context)
+  {
+    AlertDialog dialog;
+    int size;
+    EmacsButton button;
+    LinearLayout layout;
+    Button buttonView;
+    ViewGroup.LayoutParams layoutParams;
+
+    size = buttons.size ();
+
+    if (size <= 3)
+      {
+	dialog = new AlertDialog.Builder (context).create ();
+	dialog.setMessage (text);
+	dialog.setCancelable (true);
+	dialog.setOnDismissListener (this);
+
+	if (title != null)
+	  dialog.setTitle (title);
+
+	/* There are less than 4 buttons.  Add the buttons the way
+	   Android intends them to be added.  */
+
+	if (size >= 1)
+	  {
+	    button = buttons.get (0);
+	    dialog.setButton (DialogInterface.BUTTON_POSITIVE,
+			      button.name, button);
+	  }
+
+	if (size >= 2)
+	  {
+	    button = buttons.get (1);
+	    dialog.setButton (DialogInterface.BUTTON_NEUTRAL,
+			      button.name, button);
+	    buttonView
+	      = dialog.getButton (DialogInterface.BUTTON_NEUTRAL);
+	    buttonView.setEnabled (button.enabled);
+	  }
+
+	if (size >= 3)
+	  {
+	    button = buttons.get (2);
+	    dialog.setButton (DialogInterface.BUTTON_NEGATIVE,
+			      button.name, button);
+	  }
+      }
+    else
+      {
+	/* There are more than 4 buttons.  Add them all to a
+	   LinearLayout.  */
+	layout = new LinearLayout (context);
+	layoutParams
+	  = new LinearLayout.LayoutParams (ViewGroup.LayoutParams.WRAP_CONTENT,
+					   ViewGroup.LayoutParams.WRAP_CONTENT);
+
+	for (EmacsButton emacsButton : buttons)
+	  {
+	    buttonView = new Button (context);
+	    buttonView.setText (emacsButton.name);
+	    buttonView.setOnClickListener (emacsButton);
+	    buttonView.setLayoutParams (layoutParams);
+	    buttonView.setEnabled (emacsButton.enabled);
+	    layout.addView (buttonView);
+	  }
+
+	layoutParams
+	  = new FrameLayout.LayoutParams (ViewGroup.LayoutParams.MATCH_PARENT,
+					  ViewGroup.LayoutParams.WRAP_CONTENT);
+	layout.setLayoutParams (layoutParams);
+
+	/* Add that layout to the dialog's custom view.
+
+	   android.R.id.custom is documented to work.  But looking it
+	   up returns NULL, so setView must be used instead.  */
+
+	dialog = new AlertDialog.Builder (context).setView (layout).create ();
+	dialog.setMessage (text);
+	dialog.setCancelable (true);
+	dialog.setOnDismissListener (this);
+
+	if (title != null)
+	  dialog.setTitle (title);
+      }
+
+    return dialog;
+  }
+
+  /* Internal helper for display run on the main thread.  */
+
+  private boolean
+  display1 ()
+  {
+    EmacsActivity activity;
+    int size;
+    Button buttonView;
+    EmacsButton button;
+    AlertDialog dialog;
+
+    if (EmacsActivity.focusedActivities.isEmpty ())
+      return false;
+
+    activity = EmacsActivity.focusedActivities.get (0);
+    dialog = dismissDialog = toAlertDialog (activity);
+    dismissDialog.show ();
+
+    /* If there are less than four buttons, then they must be
+       individually enabled or disabled after the dialog is
+       displayed.  */
+    size = buttons.size ();
+
+    if (size <= 3)
+      {
+	if (size >= 1)
+	  {
+	    button = buttons.get (0);
+	    buttonView
+	      = dialog.getButton (DialogInterface.BUTTON_POSITIVE);
+	    buttonView.setEnabled (button.enabled);
+	  }
+
+	if (size >= 2)
+	  {
+	    button = buttons.get (1);
+	    dialog.setButton (DialogInterface.BUTTON_NEUTRAL,
+			      button.name, button);
+	    buttonView
+	      = dialog.getButton (DialogInterface.BUTTON_NEUTRAL);
+	    buttonView.setEnabled (button.enabled);
+	  }
+
+	if (size >= 3)
+	  {
+	    button = buttons.get (2);
+	    buttonView
+	      = dialog.getButton (DialogInterface.BUTTON_NEGATIVE);
+	    buttonView.setEnabled (button.enabled);
+	  }
+      }
+
+    return true;
+  }
+
+  /* Display this dialog for a suitable activity.
+     Value is false if the dialog could not be displayed,
+     and true otherwise.  */
+
+  public boolean
+  display ()
+  {
+    Runnable runnable;
+    final Holder<Boolean> rc;
+
+    rc = new Holder<Boolean> ();
+    runnable = new Runnable () {
+	@Override
+	public void
+	run ()
+	{
+	  synchronized (this)
+	    {
+	      rc.thing = display1 ();
+	      notify ();
+	    }
+	}
+      };
+
+    synchronized (runnable)
+      {
+	EmacsService.SERVICE.runOnUiThread (runnable);
+
+	try
+	  {
+	    runnable.wait ();
+	  }
+	catch (InterruptedException e)
+	  {
+	    EmacsNative.emacsAbort ();
+	  }
+      }
+
+    return rc.thing;
+  }
+
+
+
+  @Override
+  public void
+  onDismiss (DialogInterface dialog)
+  {
+    Log.d (TAG, "onDismiss: " + this);
+
+    if (wasButtonClicked)
+      return;
+
+    EmacsNative.sendContextMenu ((short) 0, 0);
+  }
+};