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--------------------------------------------------------------------------------
--- Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.               --
---                                                                           --
--- Permission is hereby granted, free of charge, to any person obtaining a   --
--- copy of this software and associated documentation files (the             --
--- "Software"), to deal in the Software without restriction, including       --
--- without limitation the rights to use, copy, modify, merge, publish,       --
--- distribute, distribute with modifications, sublicense, and/or sell copies --
--- of the Software, and to permit persons to whom the Software is furnished  --
--- to do so, subject to the following conditions:                            --
---                                                                           --
--- The above copyright notice and this permission notice shall be included   --
--- in all copies or substantial portions of the Software.                    --
---                                                                           --
--- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS   --
--- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF                --
--- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN --
--- NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,       --
--- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR     --
--- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE --
--- USE OR OTHER DEALINGS IN THE SOFTWARE.                                    --
---                                                                           --
--- Except as contained in this notice, the name(s) of the above copyright    --
--- holders shall not be used in advertising or otherwise to promote the      --
--- sale, use or other dealings in this Software without prior written        --
--- authorization.                                                            --
--------------------------------------------------------------------------------
--- $Id: TO-DO,v 1.49 2007/02/03 16:29:17 tom Exp $
--------------------------------------------------------------------------------
-
-SHORT-TERM TO-DO ITEMS:
-
-Known Problems:
-
-+ libtool does not work with GNAT.
-
-+ The screen optimization has been tested only in an ad hoc manner.  We should
-  develop a good set of regression tests to cover lib_doupdate.c and
-  lib_mvcur.c.
-
-+ Magic cookie support (for nonzero xmc values) does not work, since the logic
-  does not take into account refresh.  Also, the initial optimize does not
-  adjust the current location when a cookie is emitted.
-
-+ Scrolling optimization has holes:  for example, it forces repaints of the
-  screen between calls to refresh().
-
-+ SVr4 uses slightly different rules for determining when softkeys are shown. 
-  For example, they are initially displayed (before the ncurses 'e' test
-  activates them), and a touchwin can apparently also force them to be
-  displayed.
-
-+ The code departs from perfect 8-bit cleanness in one respect; you cannot
-  specify a character \200 as part of a capability string, because the
-  terminfo library interprets \200 as a request to embed NUL (\000) at that
-  point.  This is a legacy terminfo property we can't mess with.
-
-+ The window classes defined in the c++ subdirectory need documentation.  Some
-  C++ programmer could earn a lot of good karma by doing this...
-
-+ vid_attr() should support the set_a_attributes (sgr1) string, but does not. 
-  There appear to be no terminals that require that functionality.
-
-Portability (or lack thereof):
-
-+ Users of older System V UNIXes (but not Solaris, and probably not SVr4) may
-  trip over a known problem with the signal-handling code which causes abrupt
-  termination of ncurses applications following resume from a ^Z suspend (this
-  problem was first seen running lynx).  You will not see this problem if you
-  are running Linux or one of the 4.4BSD derivatives like FreeBSD, NetBSD, or
-  BSDI.  For details, see the analysis in the header comment of
-  ncurses/tty/lib_tstp.c .
-
-+ In theory, vwprintw and vwscanf are supposed to use the older varargs.h
-  interface for handling variadic argument lists (and are deprecated by X/Open
-  for that reason).  Linux doesn't have varargs.h, it has the newer
-  X/Open-standard stdargs.h equivalent.  So these functions use stdargs
-  instead.  This is unlikely to be a problem unless you're building ncurses on
-  a System V old enough to only have varargs.h.  (Solaris 2.5.1 used the
-  stdarg.h binding as well).
-
-+ If you're using a BSD earlier than 4.4BSD, or a Linux old enough not to have
-  a native vsscanf(3) in its library, vwscanw() will not work.  You lose.  (It
-  should work on any System V, however).  If you want to fix this, add an
-  implementation to ncurses/vsscanf.c.
-
-+ The C++ binding fails to build with a few C++ compilers.
-
-+ terminfo.5 does not format with the SunOS (and most other platform's) tbl
-  utility because it relies on a diversion for each table entry.  Get the
-  groff package.
-
-Untested features:
-
-+ The code for the HP color model using set_color_pair is untested.
-
-+ The code for handling soft labels on a terminal type with built-in support
-  for them (num_labels > 0, label_height, label_width, label_format, label_off,
-  label_on, plab_norm, lab_f*) has not been tested.  The label_format and
-  lab_f* capabilities aren't presently used.
-
-LONGER-TERM TO-DO ITEMS:
-
-1. Extended COSE conformance
-
-There is an XPG4 standard released in 1996 which describes a superset
-of the SVr4 API.  The library is BASE conformant with this standard.
-We would like to make ncurses fully conformant at the EXTENDED level
-supporting internationalization.
-
-2. DOS port
-
-Only a few of the files in the library depend on the terminfo format.
-It should be possible to further kernelize the package, then rewrite 
-a small number of core files to produce a functionally-compatible
-port that would do updates to a memory-mapped screen area.  The first
-result of this would be a DOS port.
-
-3. X port
-
-It would be nice if ncurses could recognize when it was running under X and
-maintain its own window.  With this feature, all ncurses programs would
-automatically become X programs.  The challenge is to handle resize events
-properly.
-
-4. Unused capabilities
-
-The currently unused capabilities fall naturally into several groups:
-
-A. Status-line capabilities:
-
-	Booleans: has_status_line, status_line_esc_ok.
-	Numerics: width_status_line.
-	Strings: dis_status_line, from_status_line, to_status_line.
-
-System V Release 1 curses made no use of these at all.  SVr4's use, if
-any, is unknown.  From the AT&T termcap file it looks like curses, in general,
-shouldn't use them; terminal variants with status lines have their line count
-decremented by 1, suggesting that curses is supposed to leave the status line
-alone.
-
-B. Printer capabilities:
-
-	Boolean: col_addr_glitch, cr_cancels_micro_mode, has_print_wheel,
-		row_addr_glitch, semi_auto_right_margin, cpi_changes_res,
-		lpi_changes_res.
-	Numeric: buffer_capacity, dot_horz_spacing, dot_vert_spacing,
-		max_micro_address, max_micro_jump, micro_col_size,
-		micro_line_size, number_of_pins, output_res_char,
-		output_res_line, output_res_horz_inch, print_rate,
-		wide_char_size, bit_image_entwining, bit_image_type.
-	String: down_half_line, form_feed, up_half_line, set_left_margin,
-		set_right_margin, clear_margins, change_char_pitch
-		... set_page_length (all the SVr4 printer caps),
-
-Curses doesn't use these.
-
-C. Printer-control capabilities:
-
-	Boolean: prtr_silent.
-	Strings: print_screen, prtr_on, prtr_off, prtr_non.
-
-Curses doesn't use these.
-
-D. Dialer strings:
-
-	Strings: hangup, dial_phone, quick_dial, tone, pulse, flash_hook,
-		fixed_pause, wait_tone.
-
-Curses doesn't use these.
-
-E. Window and virtual-terminal capabilities:
-
-	Numerics: maximum_windows, virtual_terminal.
-	Strings: req_for_input, create_window, goto_window, set_window.
-
-These seem to be fossils from some AT&T experiments on character-based
-window systems that never escaped the lab.  The virtual_terminal cap had
-something to do with building terminal emulations into tty line disciplines.
-
-F. Unused VDT capabilities:
-
-	Booleans: erase_overstrike, has_meta_key, insert_null_glitch,
-		move_insert, dest_tabs_magic_smso, transparent_underline,
-		needs_xon_xoff, hard_cursor.
-	Numerics: lines_of_memory, buttons.
-	Strings: pkey_key, pkey_local, pkey_xmit, underline_char, 
-		enter_xon_mode,	exit_xon_mode, xon_character, xoff_character, 
-		display_clock, remove_clock, user[0-5], display_pc_char,
-		enter_scancode_mode, exit_scancode_mode, pc_term_options, 
-		scancode_escape, alt_scancode_esc.
-
-These are the potentially important ones for ncurses.  Notes:
-
-	i) ncurses doesn't need move_insert; it never uses cup/hpa/vpa while
-		insert_mode is on.
-
-	ii) We probably don't care about dest_tabs_magic_smso; only
-		Telerays used it and they're all long obsolete.
-
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