misc.c

android-w.song.android.widget

  FREE (entry->timestamp);

  xfree (entry);
}

/* Perhaps put back the current line if it has changed. */
int
rl_maybe_replace_line ()
{
  HIST_ENTRY *temp;

  temp = current_history ();
  /* If the current line has changed, save the changes. */
  if (temp && ((UNDO_LIST *)(temp->data) != rl_undo_list))
    {
      temp = replace_history_entry (where_history (), rl_line_buffer, (histdata_t)rl_undo_list);
      xfree (temp->line);
      FREE (temp->timestamp);
      xfree (temp);
    }
  return 0;
}

/* Restore the _rl_saved_line_for_history if there is one. */
int
rl_maybe_unsave_line ()
{
  if (_rl_saved_line_for_history)
    {
      /* Can't call with `1' because rl_undo_list might point to an undo
	 list from a history entry, as in rl_replace_from_history() below. */
      rl_replace_line (_rl_saved_line_for_history->line, 0);
      rl_undo_list = (UNDO_LIST *)_rl_saved_line_for_history->data;
      _rl_free_history_entry (_rl_saved_line_for_history);
      _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
      rl_point = rl_end;	/* rl_replace_line sets rl_end */
    }
  else
    rl_ding ();
  return 0;
}

/* Save the current line in _rl_saved_line_for_history. */
int
rl_maybe_save_line ()
{
  if (_rl_saved_line_for_history == 0)
    {
      _rl_saved_line_for_history = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY));
      _rl_saved_line_for_history->line = savestring (rl_line_buffer);
      _rl_saved_line_for_history->timestamp = (char *)NULL;
      _rl_saved_line_for_history->data = (char *)rl_undo_list;
    }

  return 0;
}

int
_rl_free_saved_history_line ()
{
  if (_rl_saved_line_for_history)
    {
      _rl_free_history_entry (_rl_saved_line_for_history);
      _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
    }
  return 0;
}

static void
_rl_history_set_point ()
{
  rl_point = (_rl_history_preserve_point && _rl_history_saved_point != -1)
		? _rl_history_saved_point
		: rl_end;
  if (rl_point > rl_end)
    rl_point = rl_end;

#if defined (VI_MODE)
  if (rl_editing_mode == vi_mode && _rl_keymap != vi_insertion_keymap)
    rl_point = 0;
#endif /* VI_MODE */

  if (rl_editing_mode == emacs_mode)
    rl_mark = (rl_point == rl_end ? 0 : rl_end);
}

void
rl_replace_from_history (entry, flags)
     HIST_ENTRY *entry;
     int flags;			/* currently unused */
{
  /* Can't call with `1' because rl_undo_list might point to an undo list
     from a history entry, just like we're setting up here. */
  rl_replace_line (entry->line, 0);
  rl_undo_list = (UNDO_LIST *)entry->data;
  rl_point = rl_end;
  rl_mark = 0;

#if defined (VI_MODE)
  if (rl_editing_mode == vi_mode)
    {
      rl_point = 0;
      rl_mark = rl_end;
    }
#endif
}

/* Process and free undo lists attached to each history entry prior to the
   current entry, inclusive, reverting each line to its saved state.  This 
   is destructive, and state about the current line is lost.  This is not
   intended to be called while actively editing, and the current line is
   not assumed to have been added to the history list. */
void
_rl_revert_all_lines ()
{
  int hpos;
  HIST_ENTRY *entry;
  UNDO_LIST *ul, *saved_undo_list;
  char *lbuf;

  lbuf = savestring (rl_line_buffer);
  saved_undo_list = rl_undo_list;
  hpos = where_history ();

  entry = (hpos == history_length) ? previous_history () : current_history ();
  while (entry)
    {
      if (ul = (UNDO_LIST *)entry->data)
	{
	  if (ul == saved_undo_list)
	    saved_undo_list = 0;
	  /* Set up rl_line_buffer and other variables from history entry */
	  rl_replace_from_history (entry, 0);	/* entry->line is now current */
	  /* Undo all changes to this history entry */
	  while (rl_undo_list)
	    rl_do_undo ();
	  /* And copy the reverted line back to the history entry, preserving
	     the timestamp. */
	  FREE (entry->line);
	  entry->line = savestring (rl_line_buffer);
	  entry->data = 0;
	}
      entry = previous_history ();
    }

  /* Restore history state */
  rl_undo_list = saved_undo_list;	/* may have been set to null */
  history_set_pos (hpos);
  
  /* reset the line buffer */
  rl_replace_line (lbuf, 0);
  _rl_set_the_line ();

  /* and clean up */
  xfree (lbuf);
}  

/* **************************************************************** */
/*								    */
/*			History Commands			    */
/*								    */
/* **************************************************************** */

/* Meta-< goes to the start of the history. */
int
rl_beginning_of_history (count, key)
     int count, key;
{
  return (rl_get_previous_history (1 + where_history (), key));
}

/* Meta-> goes to the end of the history.  (The current line). */
int
rl_end_of_history (count, key)
     int count, key;
{
  rl_maybe_replace_line ();
  using_history ();
  rl_maybe_unsave_line ();
  return 0;
}

/* Move down to the next history line. */
int
rl_get_next_history (count, key)
     int count, key;
{
  HIST_ENTRY *temp;

  if (count < 0)
    return (rl_get_previous_history (-count, key));

  if (count == 0)
    return 0;

  rl_maybe_replace_line ();

  /* either not saved by rl_newline or at end of line, so set appropriately. */
  if (_rl_history_saved_point == -1 && (rl_point || rl_end))
    _rl_history_saved_point = (rl_point == rl_end) ? -1 : rl_point;

  temp = (HIST_ENTRY *)NULL;
  while (count)
    {
      temp = next_history ();
      if (!temp)
	break;
      --count;
    }

  if (temp == 0)
    rl_maybe_unsave_line ();
  else
    {
      rl_replace_from_history (temp, 0);
      _rl_history_set_point ();
    }
  return 0;
}

/* Get the previous item out of our interactive history, making it the current
   line.  If there is no previous history, just ding. */
int
rl_get_previous_history (count, key)
     int count, key;
{
  HIST_ENTRY *old_temp, *temp;

  if (count < 0)
    return (rl_get_next_history (-count, key));

  if (count == 0)
    return 0;

  /* either not saved by rl_newline or at end of line, so set appropriately. */
  if (_rl_history_saved_point == -1 && (rl_point || rl_end))
    _rl_history_saved_point = (rl_point == rl_end) ? -1 : rl_point;

  /* If we don't have a line saved, then save this one. */
  rl_maybe_save_line ();

  /* If the current line has changed, save the changes. */
  rl_maybe_replace_line ();

  temp = old_temp = (HIST_ENTRY *)NULL;
  while (count)
    {
      temp = previous_history ();
      if (temp == 0)
	break;

      old_temp = temp;
      --count;
    }

  /* If there was a large argument, and we moved back to the start of the
     history, that is not an error.  So use the last value found. */
  if (!temp && old_temp)
    temp = old_temp;

  if (temp == 0)
    rl_ding ();
  else
    {
      rl_replace_from_history (temp, 0);
      _rl_history_set_point ();
    }

  return 0;
}

/* **************************************************************** */
/*								    */
/*			    Editing Modes			    */
/*								    */
/* **************************************************************** */
/* How to toggle back and forth between editing modes. */
int
rl_vi_editing_mode (count, key)
     int count, key;
{
#if defined (VI_MODE)
  _rl_set_insert_mode (RL_IM_INSERT, 1);	/* vi mode ignores insert mode */
  rl_editing_mode = vi_mode;
  rl_vi_insert_mode (1, key);
#endif /* VI_MODE */

  return 0;
}

int
rl_emacs_editing_mode (count, key)
     int count, key;
{
  rl_editing_mode = emacs_mode;
  _rl_set_insert_mode (RL_IM_INSERT, 1); /* emacs mode default is insert mode */
  _rl_keymap = emacs_standard_keymap;
  return 0;
}

/* Function for the rest of the library to use to set insert/overwrite mode. */
void
_rl_set_insert_mode (im, force)
     int im, force;
{
#ifdef CURSOR_MODE
  _rl_set_cursor (im, force);
#endif

  rl_insert_mode = im;
}

/* Toggle overwrite mode.  A positive explicit argument selects overwrite
   mode.  A negative or zero explicit argument selects insert mode. */
int
rl_overwrite_mode (count, key)
     int count, key;
{
  if (rl_explicit_arg == 0)
    _rl_set_insert_mode (rl_insert_mode ^ 1, 0);
  else if (count > 0)
    _rl_set_insert_mode (RL_IM_OVERWRITE, 0);
  else
    _rl_set_insert_mode (RL_IM_INSERT, 0);

  return 0;
}