master 12aca0f90d7: Update Android port

[Po Lu]

branch: master
commit 12aca0f90d7aeaa8444508245e7596a64f2e8dce
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Update Android port
    
    * doc/emacs/input.texi (On-Screen Keyboards): Revise
    documentation to reflect changes.
    
    * src/keyboard.c (lispy_function_keys) <KEYCODE_DPAD_CENTER>:
    Define select key absent out of negligence.
    
    * src/xterm.c (syms_of_xterm) <x-quit-keysym>: Default to nil.
    (bug#66040)
---
 doc/emacs/input.texi | 7 ++++---
 src/keyboard.c       | 5 +++++
 src/xterm.c          | 9 ++-------
 3 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/doc/emacs/input.texi b/doc/emacs/input.texi
index 4f49ca3cece..db0e88a1c9c 100644
--- a/doc/emacs/input.texi
+++ b/doc/emacs/input.texi
@@ -145,9 +145,10 @@ of a hardware button that is always present on the device 
results in
 Emacs quitting.  @xref{Quitting}.
 
 @vindex x-quit-keysym
-  Which button is used to do this depends on the window system in use:
-on X, it is defined in the variable @code{x-quit-keysym}, and on
-Android, it is always the volume down button.
+  The button afforded such special treatment varies; under X, no such
+button exists by default, but one can be configured through the
+variable @code{x-quit-keysym}, whereas under Android it is always the
+volume down buttons.
 
 @cindex text conversion, keyboards
   Most input methods designed to work with on-screen keyboards perform
diff --git a/src/keyboard.c b/src/keyboard.c
index 6ab1cdebc12..f756f163e87 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -4989,6 +4989,10 @@ static const char *const lispy_accent_keys[] =
 #ifdef HAVE_ANDROID
 #define FUNCTION_KEY_OFFSET 0
 
+/* Mind that Android designates 23 KEYCODE_DPAD_CENTER, but it is
+   merely abstruse terminology for the ``select'' key frequently
+   located in certain physical keyboards.  */
+
 const char *const lispy_function_keys[] =
   {
     /* All elements in this array default to 0, except for the few
@@ -5025,6 +5029,7 @@ const char *const lispy_function_keys[] =
     [218] = "kana",
     [21]  = "left",
     [22]  = "right",
+    [23]  = "select",
     [24]  = "volume-up",
     [259] = "help",
     [25]  = "volume-down",
diff --git a/src/xterm.c b/src/xterm.c
index c459e5d8d95..18a6c51efb3 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -32812,17 +32812,12 @@ frame placement via frame parameters, 
`set-frame-position', and
 
 This is used to support quitting on devices that do not have any kind
 of physical keyboard, or where the physical keyboard is incapable of
-entering `C-g'.  It defaults to `XF86XK_AudioLowerVolume' on XFree86
-and X.Org servers, and is unset.
+entering `C-g'.
 
 The value is an alist associating between strings, describing X server
 vendor names, and a single number describing the keysym to use.  The
 keysym to use for each display connection is determined upon
 connection setup, and does not reflect further changes to this
 variable.  */);
-  Vx_quit_keysym
-    = list2 (Fcons (build_string ("The X.Org Foundation"),
-                   make_int (269025041)),
-            Fcons (build_string ("The XFree86 Project, Inc."),
-                   make_int (269025041)));
+  Vx_quit_keysym = Qnil;
 }