1 -- $Id: TO-DO,v 1.43 2004/02/08 21:09:00 tom Exp $
3 SHORT-TERM TO-DO ITEMS:
7 * The form/menu libraries do not use wide-character features.
9 * Some users would like to build a single version of libtinfo which can be
10 used from either libncursesw or libncurses.
12 * libtool does not work with GNAT.
14 * The screen optimization has been tested only in an ad hoc manner. We should
15 develop a good set of regression tests to cover lib_doupdate.c and
18 * Magic cookie support does not work, since the logic does not take into account
19 refresh. Also, the initial optimize does not adjust the current location
20 when a cookie is emitted.
22 * Scrolling optimization has holes: for example, it forces repaints of the
23 screen between calls to refresh().
25 * SVr4 uses slightly different rules for determining when softkeys are shown.
26 For example, they are initially displayed (before the ncurses 'e' test
27 activates them), and a touchwin can apparently also force them to be
30 * The code departs from perfect 8-bit cleanness in one respect; you cannot
31 specify a character \200 as part of a capability string, because the terminfo
32 library interprets \200 as a request to embed NUL (\000) at that point. This
33 is a legacy terminfo property we can't mess with.
35 * The window classes defined in the c++ subdirectory need documentation.
36 Some C++ programmer could earn a lot of good karma by doing this...
38 * The resizeterm() function does not handle ripped-off lines such as that
39 done for the slk_XXX functions.
41 Portability (or lack thereof):
43 * Users of older System V UNIXes (but not Solaris, and probably not SVr4)
44 may trip over a known problem with the signal-handling code which causes
45 abrupt termination of ncurses applications following resume from a ^Z
46 suspend (this problem was first seen running lynx). You will not see
47 this problem if you are running Linux or one of the 4.4BSD derivatives
48 like FreeBSD, NetBSD, or BSDI. For details, see the analysis in the
49 header comment of ncurses/tty/lib_tstp.c .
51 * In theory, vwprintw and vwscanf are supposed to use the older varargs.h
52 interface for handling variadic argument lists. Linux doesn't have
53 varargs.h, it has the newer X/Open-standard stdargs.h equivalent. So
54 these functions use stdargs instead. This is unlikely to be a problem
55 unless you're building ncurses on a System V old enough to only have
56 varargs.h. (Solaris 2.5.1 uses the stdarg.h binding as well).
58 * If you're using a BSD earlier than 4.4BSD, or a Linux old enough not to
59 have a native vsscanf(3) in its library, vwscanw() will not work. You lose.
60 (It should work on any System V, however). If you want to fix this, add
61 an implementation to ncurses/vsscanf.c.
63 * The C++ binding fails to build with a few C++ compilers, mainly with
64 configure script problems with vsscanf().
66 * terminfo.5 does not format with the SunOS (and most other platform's) tbl
67 utility because it relies on a diversion for each table entry. Get the groff
72 * The code for the HP color model using set_color_pair is untested.
74 * The code for handling soft labels on a terminal type with built-in support
75 for them (num_labels > 0, label_height, label_width, label_format, label_off,
76 label_on, plab_norm, lab_f*) has not been tested. The label_format and
77 lab_f* capabilities aren't presently used.
79 LONGER-TERM TO-DO ITEMS:
81 1. Extended COSE conformance
83 There is an XPG4 standard recently released which describes a superset
84 of the SVr4 API. The library is BASE conformant with this standard.
85 We would like to make ncurses fully conformant at the EXTENDED level
86 supporting internationalization.
90 Only 16 of the 55 files in the library depend on the terminfo format.
91 It should be possible to further kernelize the package, then rewrite
92 a small number of core files to produce a functionally-compatible
93 port that would do updates to a memory-mapped screen area. The first
94 result of this would be a DOS port.
98 It would be nice if ncurses could recognize when it was running under X and
99 maintain its own window. With this feature, all ncurses programs would
100 automatically become X programs. The challenge is to handle resize events
103 4. Unused capabilities
105 The currently unused capabilities fall naturally into several groups:
107 A. Status-line capabilities:
109 Booleans: has_status_line, status_line_esc_ok.
110 Numerics: width_status_line.
111 Strings: dis_status_line, from_status_line, to_status_line.
113 System V Release 1 curses made no use of these at all. SVr4's use, if
114 any, is unknown. From the AT&T termcap file it looks like curses, in general,
115 shouldn't use them; terminal variants with status lines have their line count
116 decremented by 1, suggesting that curses is supposed to leave the status line
119 B. Printer capabilities:
121 Boolean: col_addr_glitch, cr_cancels_micro_mode, has_print_wheel,
122 row_addr_glitch, semi_auto_right_margin, cpi_changes_res,
124 Numeric: buffer_capacity, dot_horz_spacing, dot_vert_spacing,
125 max_micro_address, max_micro_jump, micro_col_size,
126 micro_line_size, number_of_pins, output_res_char,
127 output_res_line, output_res_horz_inch, print_rate,
128 wide_char_size, bit_image_entwining, bit_image_type.
129 String: down_half_line, form_feed, up_half_line, set_left_margin,
130 set_right_margin, clear_margins, change_char_pitch
131 ... set_page_length (all the SVr4 printer caps),
133 Curses doesn't use these.
135 C. Printer-control capabilities:
137 Boolean: prtr_silent.
138 Strings: print_screen, prtr_on, prtr_off, prtr_non.
140 Curses doesn't use these.
144 Strings: hangup, dial_phone, quick_dial, tone, pulse, flash_hook,
145 fixed_pause, wait_tone.
147 Curses doesn't use these.
149 E. Window and virtual-terminal capabilities:
151 Numerics: maximum_windows, virtual_terminal.
152 Strings: req_for_input, create_window, goto_window, set_window.
154 These seem to be fossils from some AT&T experiments on character-based
155 window systems that never escaped the lab. The virtual_terminal cap had
156 something to do with building terminal emulations into tty line disciplines.
158 F. Unused VDT capabilities:
160 Booleans: erase_overstrike, has_meta_key, insert_null_glitch,
161 move_insert, dest_tabs_magic_smso, transparent_underline,
162 needs_xon_xoff, hard_cursor.
163 Numerics: lines_of_memory, buttons.
164 Strings: pkey_key, pkey_local, pkey_xmit, underline_char,
165 enter_xon_mode, exit_xon_mode, xon_character, xoff_character,
166 display_clock, remove_clock, user[0-5], display_pc_char,
167 enter_scancode_mode, exit_scancode_mode, pc_term_options,
168 scancode_escape, alt_scancode_esc.
170 These are the potentially important ones for ncurses. Notes:
172 i) ncurses doesn't need move_insert; it never uses cup/hpa/vpa while
175 ii) We probably don't care about dest_tabs_magic_smso; only
176 Telerays used it and they're all long obsolete.