feature/android 9e914224972: Update Android port

[Po Lu]

branch: feature/android
commit 9e9142249725b4785a01734a8c0f50301fccdea7
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Update Android port
    
    * doc/lispref/commands.texi (Misc Events): Correctly index
    `set-text-conversion-style'.
    * lisp/tool-bar.el (tool-bar-event-apply-alt-modifier)
    (tool-bar-event-apply-super-modifier)
    (tool-bar-event-apply-hyper-modifier)
    (tool-bar-event-apply-shift-modifier)
    (tool-bar-event-apply-control-modifier)
    (tool-bar-event-apply-meta-modifier): Pass t when restoring text
    conversion style.
    * src/keyboard.c (restore_reading_key_sequence): New function.
    (read_key_sequence): Set `reading_key_sequence' where necessary.
    * src/keyboard.h: Declare variable.
    * src/textconv.c (check_postponed_buffers): New function.
    (Fset_text_conversion_style): New argument.  If set, and a key
    sequence is being read, postpone resetting the IME until the key
    sequence is read.
    (syms_of_textconv): Clear new variable and add staticpro.
    * src/textconv.h: Update prototypes.
---
 doc/lispref/commands.texi |  2 +-
 lisp/tool-bar.el          | 12 +++----
 src/keyboard.c            | 35 +++++++++++++++++++
 src/keyboard.h            |  8 +++++
 src/textconv.c            | 89 +++++++++++++++++++++++++++++++++++++++++++++--
 src/textconv.h            |  3 ++
 6 files changed, 139 insertions(+), 10 deletions(-)

diff --git a/doc/lispref/commands.texi b/doc/lispref/commands.texi
index eaf6f3e451b..7a076406bed 100644
--- a/doc/lispref/commands.texi
+++ b/doc/lispref/commands.texi
@@ -2251,7 +2251,7 @@ This, or any other value, means that the input method 
will be enabled
 and make edits followed by @code{text-conversion} events.
 @end table
 
-@findex disable-text-conversion
+@findex set-text-conversion-style
 Changes to the value of this variable will only take effect upon the
 next redisplay after the buffer becomes the selected buffer of a
 frame.  If you need to disable text conversion in a way that takes
diff --git a/lisp/tool-bar.el b/lisp/tool-bar.el
index aeab21f61a0..1ede5c45971 100644
--- a/lisp/tool-bar.el
+++ b/lisp/tool-bar.el
@@ -444,7 +444,7 @@ apply any extra modifiers bound to subsequent `tool-bar' 
events."
       ;; Re-enable text conversion if necessary.
       (unless (or (not (fboundp 'set-text-conversion-style))
                   (eq old-text-conversion-style text-conversion-style))
-        (set-text-conversion-style old-text-conversion-style)))))
+        (set-text-conversion-style old-text-conversion-style t)))))
 
 (defun tool-bar-event-apply-super-modifier (_ignore-prompt)
   "Like `event-apply-super-modifier'.
@@ -480,7 +480,7 @@ apply any extra modifiers bound to subsequent `tool-bar' 
events."
       ;; Re-enable text conversion if necessary.
       (unless (or (not (fboundp 'set-text-conversion-style))
                   (eq old-text-conversion-style text-conversion-style))
-        (set-text-conversion-style old-text-conversion-style)))))
+        (set-text-conversion-style old-text-conversion-style t)))))
 
 (defun tool-bar-event-apply-hyper-modifier (_ignore-prompt)
   "Like `event-apply-hyper-modifier'.
@@ -516,7 +516,7 @@ apply any extra modifiers bound to subsequent `tool-bar' 
events."
       ;; Re-enable text conversion if necessary.
       (unless (or (not (fboundp 'set-text-conversion-style))
                   (eq old-text-conversion-style text-conversion-style))
-        (set-text-conversion-style old-text-conversion-style)))))
+        (set-text-conversion-style old-text-conversion-style t)))))
 
 (defun tool-bar-event-apply-shift-modifier (_ignore-prompt)
   "Like `event-apply-shift-modifier'.
@@ -552,7 +552,7 @@ apply any extra modifiers bound to subsequent `tool-bar' 
events."
       ;; Re-enable text conversion if necessary.
       (unless (or (not (fboundp 'set-text-conversion-style))
                   (eq old-text-conversion-style text-conversion-style))
-        (set-text-conversion-style old-text-conversion-style)))))
+        (set-text-conversion-style old-text-conversion-style t)))))
 
 (defun tool-bar-event-apply-control-modifier (_ignore-prompt)
   "Like `event-apply-control-modifier'.
@@ -588,7 +588,7 @@ apply any extra modifiers bound to subsequent `tool-bar' 
events."
       ;; Re-enable text conversion if necessary.
       (unless (or (not (fboundp 'set-text-conversion-style))
                   (eq old-text-conversion-style text-conversion-style))
-        (set-text-conversion-style old-text-conversion-style)))))
+        (set-text-conversion-style old-text-conversion-style t)))))
 
 (defun tool-bar-event-apply-meta-modifier (_ignore-prompt)
   "Like `event-apply-meta-modifier'.
@@ -624,7 +624,7 @@ apply any extra modifiers bound to subsequent `tool-bar' 
events."
       ;; Re-enable text conversion if necessary.
       (unless (or (not (fboundp 'set-text-conversion-style))
                   (eq old-text-conversion-style text-conversion-style))
-        (set-text-conversion-style old-text-conversion-style)))))
+        (set-text-conversion-style old-text-conversion-style t)))))
 
 (define-minor-mode modifier-bar-mode
   "Toggle display of the modifier bar.
diff --git a/src/keyboard.c b/src/keyboard.c
index b33fbf8f155..ea07c538aa2 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -115,6 +115,13 @@ static KBOARD *all_kboards;
 /* True in the single-kboard state, false in the any-kboard state.  */
 static bool single_kboard;
 
+#ifdef HAVE_TEXT_CONVERSION
+
+/* True if a key sequence is currently being read.  */
+bool reading_key_sequence;
+
+#endif /* HAVE_TEXT_CONVERSION */
+
 /* Minimum allowed size of the recent_keys vector.  */
 #define MIN_NUM_RECENT_KEYS (100)
 
@@ -10102,6 +10109,24 @@ void init_raw_keybuf_count (void)
   raw_keybuf_count = 0;
 }
 
+
+
+#ifdef HAVE_TEXT_CONVERSION
+
+static void
+restore_reading_key_sequence (int old_reading_key_sequence)
+{
+  reading_key_sequence = old_reading_key_sequence;
+
+  /* If a key sequence is no longer being read, reset input methods
+     whose state changes were postponed.  */
+
+  if (!old_reading_key_sequence)
+    check_postponed_buffers ();
+}
+
+#endif /* HAVE_TEXT_CONVERSION */
+
 /* Read a sequence of keys that ends with a non prefix character,
    storing it in KEYBUF, a buffer of size READ_KEY_ELTS.
    Prompt with PROMPT.
@@ -10261,6 +10286,16 @@ read_key_sequence (Lisp_Object *keybuf, Lisp_Object 
prompt,
   keys_start = this_command_key_count;
   this_single_command_key_start = keys_start;
 
+#ifdef HAVE_TEXT_CONVERSION
+  /* Set `reading_key_sequence' to true.  This variable is used by
+     Fset_text_conversion_style to determine if it should postpone
+     resetting the input method until this function completes.  */
+
+  record_unwind_protect_int (restore_reading_key_sequence,
+                            reading_key_sequence);
+  reading_key_sequence = true;
+#endif /* HAVE_TEXT_CONVERSION */
+
   /* We jump here when we need to reinitialize fkey and keytran; this
      happens if we switch keyboards between rescans.  */
  replay_entire_sequence:
diff --git a/src/keyboard.h b/src/keyboard.h
index 26eecd48b00..9f6e65f9a09 100644
--- a/src/keyboard.h
+++ b/src/keyboard.h
@@ -246,6 +246,14 @@ extern KBOARD *initial_kboard;
    kboard, but doing so requires throwing to wrong_kboard_jmpbuf.  */
 extern KBOARD *current_kboard;
 
+
+#ifdef HAVE_TEXT_CONVERSION
+
+/* True if a key sequence is currently being read.  */
+extern bool reading_key_sequence;
+
+#endif /* HAVE_TEXT_CONVERSION */
+
 /* Total number of times read_char has returned, modulo UINTMAX_MAX + 1.  */
 extern uintmax_t num_input_events;
 
diff --git a/src/textconv.c b/src/textconv.c
index 6718568ac98..60f3ba80577 100644
--- a/src/textconv.c
+++ b/src/textconv.c
@@ -2020,10 +2020,67 @@ register_textconv_interface (struct textconv_interface 
*interface)
 
 
 
+/* List of buffers whose text conversion state will be reset after a
+   key sequence is read.  */
+static Lisp_Object postponed_buffers;
+
+/* Reset the text conversion style of each frame whose selected buffer
+   is contained inside `postponed_buffers'.  Set `postponed_buffers'
+   to nil.  */
+
+void
+check_postponed_buffers (void)
+{
+  Lisp_Object buffer, tail, frame;
+  struct buffer *b;
+  struct frame *f;
+
+  buffer = postponed_buffers;
+  postponed_buffers = Qnil;
+
+  if (!text_interface->reset)
+    return;
+
+  FOR_EACH_TAIL (buffer)
+    {
+      b = XBUFFER (XCAR (buffer));
+
+      /* Continue if this is a dead buffer.  */
+
+      if (!BUFFER_LIVE_P (b))
+       continue;
+
+      /* If no windows are displaying B anymore, continue.  */
+
+      if (!buffer_window_count (b))
+       continue;
+
+      /* Look for frames which have B selected.  */
+
+      FOR_EACH_FRAME (tail, frame)
+       {
+         f = XFRAME (frame);
+
+         if (WINDOW_LIVE_P (f->old_selected_window)
+             && FRAME_WINDOW_P (f)
+             /* N.B. that the same frame can't be reset twice as long
+                as the list of buffers remains unique.  */
+             && EQ (XWINDOW (f->old_selected_window)->contents,
+                    XCAR (buffer)))
+           {
+             block_input ();
+             reset_frame_state (f);
+             text_interface->reset (f);
+             unblock_input ();
+           }
+       }
+    }
+}
+
 /* Lisp interface.  */
 
 DEFUN ("set-text-conversion-style", Fset_text_conversion_style,
-       Sset_text_conversion_style, 1, 1, 0,
+       Sset_text_conversion_style, 1, 2, 0,
        doc: /* Set the text conversion style in the current buffer.
 
 Set `text-conversion-style' to VALUE, then force any input method
@@ -2032,8 +2089,17 @@ editing frame displaying this buffer to stop itself.
 This can lead to a significant amount of time being taken by the input
 method resetting itself, so you should not use this function lightly;
 instead, set `text-conversion-style' before your buffer is displayed,
-and let redisplay manage the input method appropriately.  */)
-  (Lisp_Object value)
+and let redisplay manage the input method appropriately.
+
+If a key sequence is currently being read (either through the command
+loop or by a call to `read-key-sequence') and AFTER-KEY-SEQUENCE is
+non-nil, don't perform changes to the input method until the key
+sequence is read.  This is useful within a function bound to
+`input-decode-map' or `local-function-key-map', as it prevents the
+input method from being redundantly enabled according to VALUE if the
+replacement key sequence returned starts a new key sequence and makes
+`read-key-sequence' disable text conversion again.  */)
+  (Lisp_Object value, Lisp_Object after_key_sequence)
 {
   Lisp_Object tail, frame;
   struct frame *f;
@@ -2051,6 +2117,20 @@ and let redisplay manage the input method appropriately. 
 */)
     {
       buffer = Fcurrent_buffer ();
 
+      /* Postpone changes to the actual text conversion state if
+        AFTER_KEY_SEQUENCE is non-nil and a key sequence is being
+        read.  */
+
+      if (reading_key_sequence && !NILP (after_key_sequence))
+       {
+         if (NILP (Fmemq (buffer, postponed_buffers)))
+           /* `check_postponed_buffers' will hopefully be called soon
+              enough to avoid postponed_buffers growing
+              indefinitely.  */
+           postponed_buffers = Fcons (buffer, postponed_buffers);
+         return Qnil;
+       }
+
       FOR_EACH_FRAME (tail, frame)
        {
          f = XFRAME (frame);
@@ -2126,4 +2206,7 @@ nil means to display no indication of a temporary edit.  
*/);
   Vtext_conversion_face = Qunderline;
 
   defsubr (&Sset_text_conversion_style);
+
+  postponed_buffers = Qnil;
+  staticpro (&postponed_buffers);
 }
diff --git a/src/textconv.h b/src/textconv.h
index 7550388a723..feac5b805af 100644
--- a/src/textconv.h
+++ b/src/textconv.h
@@ -118,6 +118,8 @@ struct textconv_callback_struct
   struct textconv_conversion_text text;
 };
 
+
+
 #define TEXTCONV_SKIP_CONVERSION_REGION (1 << 0)
 
 extern int textconv_query (struct frame *, struct textconv_callback_struct *,
@@ -148,6 +150,7 @@ extern char *get_surrounding_text (struct frame *, 
ptrdiff_t,
                                   ptrdiff_t *, ptrdiff_t *,
                                   ptrdiff_t *, ptrdiff_t *);
 extern bool conversion_disabled_p (void);
+extern void check_postponed_buffers (void);
 
 extern void register_textconv_interface (struct textconv_interface *);