Implement more Android text editing controls

* lisp/term/android-win.el (android-deactivate-mark-command):
New command.
(select-all, start-selecting-text, stop-selecting-text): Arrange
for commands manipulating the region to be executed when these
keys are registered.

* src/android.c (android_get_keysym_name): Return the keysym
name of each of the new keysyms introduced.

* src/androidterm.c (performContextMenuAction): Save special
keysyms into key events for the selectAll, startSelectingText
and stopSelectingText actions.

2 files changed, 40 insertions, 1 deletions

diff --git a/src/android.c b/src/android.c
index 79f16568fd4..3397ec0e740 100644
--- a/src/android.c
+++ b/src/android.c
@@ -5598,6 +5598,27 @@ android_get_keysym_name (int keysym, char *name_return, size_t size)
   const char *buffer;
   jmethodID method;
 
+  /* These keysyms are special editor actions sent by the input
+     method.  */
+
+  switch (keysym)
+    {
+    case 65536 + 1:
+      strncpy (name_return, "select-all", size - 1);
+      name_return[size] = '\0';
+      return;
+
+    case 65536 + 2:
+      strncpy (name_return, "start-selecting-text", size - 1);
+      name_return[size] = '\0';
+      return;
+
+    case 65536 + 3:
+      strncpy (name_return, "stop-selecting-text", size - 1);
+      name_return[size] = '\0';
+      return;
+    }
+
   method = service_class.name_keysym;
   string
     = (*android_java_env)->CallNonvirtualObjectMethod (android_java_env,
@@ -5607,6 +5628,13 @@ android_get_keysym_name (int keysym, char *name_return, size_t size)
                                                        (jint) keysym);
   android_exception_check ();
 
+  if (!string)
+    {
+      strncpy (name_return, "stop-selecting-text", size - 1);
+      name_return[size] = '\0';
+      return;
+    }
+
   buffer = (*android_java_env)->GetStringUTFChars (android_java_env,
                                                    (jstring) string,
                                                    NULL);
diff --git a/src/androidterm.c b/src/androidterm.c
index 4a479daf452..1593cac36ba 100644
--- a/src/androidterm.c
+++ b/src/androidterm.c
@@ -5402,11 +5402,22 @@ NATIVE_NAME (performContextMenuAction) (JNIEnv *env, jobject object,
 
   switch (action)
     {
+      /* The subsequent three keycodes are addressed by
+         android_get_keysym_name rather than in keyboard.c.  */
+
     case 0: /* android.R.id.selectAll */
+      key = 65536 + 1;
+      break;
+
     case 1: /* android.R.id.startSelectingText */
+      key = 65536 + 2;
+      break;
+
     case 2: /* android.R.id.stopSelectingText */
+      key = 65536 + 3;
+      break;
+
     default:
-      /* These actions are not implemented.  */
       return;
 
     case 3: /* android.R.id.cut */