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27 -------------------------------------------------------------------------------
28 -- $Id: TO-DO,v 1.57 2011/03/28 00:23:02 tom Exp $
29 -------------------------------------------------------------------------------
31 SHORT-TERM TO-DO ITEMS:
35 + libtool does not work with GNAT.
37 + The screen optimization has been tested only in an ad hoc manner. We should
38 develop a good set of regression tests to cover lib_doupdate.c and
41 + Magic cookie support (for nonzero xmc values) does not work, since the logic
42 does not take into account refresh. Also, the initial optimize does not
43 adjust the current location when a cookie is emitted.
45 + Scrolling optimization has holes: for example, it forces repaints of the
46 screen between calls to refresh().
48 + SVr4 uses slightly different rules for determining when softkeys are shown.
49 For example, they are initially displayed (before the ncurses 'e' test
50 activates them), and a touchwin can apparently also force them to be
53 + The code departs from perfect 8-bit cleanness in one respect; you cannot
54 specify a character \200 as part of a capability string, because the
55 terminfo library interprets \200 as a request to embed NUL (\000) at that
56 point. This is a legacy terminfo property we can't mess with.
58 + The window classes defined in the c++ subdirectory need documentation. Some
59 C++ programmer could earn a lot of good karma by doing this...
61 + vid_attr() should support the set_a_attributes (sgr1) string, but does not.
62 There appear to be no terminals that require that functionality.
64 + the configure --disable-ext-funcs option does not work for Ada95 tree.
66 + the --with-pthread configuration builds for Cygwin, but does not work
67 properly (test/worm.c shows all of the worms in the same location).
69 + the --enable-rpath configure option builds for the corresponding platforms;
70 however combining it with --with-ticlib and --with-termlib does not always
71 produce libraries that can be run without setting environment variables.
72 Building those with libtool does not work either. (This is a problem with
75 + more work is needed to make the MinGW port support ordinary terminals.
77 Portability (or lack thereof):
79 + Users of older System V UNIXes (but not Solaris, and probably not SVr4) may
80 trip over a known problem with the signal-handling code which causes abrupt
81 termination of ncurses applications following resume from a ^Z suspend (this
82 problem was first seen running lynx). You will not see this problem if you
83 are using one of the 4.4BSD derivatives like such as, NetBSD, or BSDI, or
84 systems using that convention. For details, see the analysis in the header
85 comment of ncurses/tty/lib_tstp.c .
87 + In theory, vwprintw and vwscanf are supposed to use the older varargs.h
88 interface for handling variadic argument lists (and are deprecated by X/Open
89 for that reason). Many newer systems do no have varargs.h, instead they have
90 only the newer X/Open-standard stdargs.h equivalent. So these functions use
91 stdargs instead. This is unlikely to be a problem unless you're building
92 ncurses on a System V old enough to only have varargs.h. (Solaris 2.5.1 used
93 the stdarg.h binding as well).
95 + If you're using a system old enough not to have a native vsscanf(3) in its
96 library, vwscanw() will not work. If you want to fix this, add an
97 implementation to ncurses/vsscanf.c.
99 + The C++ binding fails to build with a few C++ compilers.
101 + terminfo.5 does not format with the SunOS (and most other platform's) tbl
102 utility because it relies on a diversion for each table entry. Get the
107 + The code for the HP color model using set_color_pair is untested.
109 + The code for handling soft labels on a terminal type with built-in support
110 for them (num_labels > 0, label_height, label_width, label_format, label_off,
111 label_on, plab_norm, lab_f*) has not been tested. The label_format and
112 lab_f* capabilities aren't presently used.
114 LONGER-TERM TO-DO ITEMS:
116 1. Extended COSE conformance
118 There is an XPG4 standard released in 1996 which describes a superset
119 of the SVr4 API. The library is BASE conformant with this standard.
120 We would like to make ncurses fully conformant at the EXTENDED level
121 supporting internationalization.
125 Only a few of the files in the library depend on the terminfo format.
126 It should be possible to further kernelize the package, then rewrite
127 a small number of core files to produce a functionally-compatible
128 port that would do updates to a memory-mapped screen area. The first
129 result of this would be a DOS port.
133 It would be nice if ncurses could recognize when it was running under X and
134 maintain its own window. With this feature, all ncurses programs would
135 automatically become X programs. The challenge is to handle resize events
138 4. Unused capabilities
140 The currently unused capabilities fall naturally into several groups:
142 A. Status-line capabilities:
144 Booleans: has_status_line, status_line_esc_ok.
145 Numerics: width_status_line.
146 Strings: dis_status_line, from_status_line, to_status_line.
148 System V Release 1 curses made no use of these at all. SVr4's use, if
149 any, is unknown. From the AT&T termcap file it looks like curses, in general,
150 shouldn't use them; terminal variants with status lines have their line count
151 decremented by 1, suggesting that curses is supposed to leave the status line
154 B. Printer capabilities:
156 Boolean: col_addr_glitch, cr_cancels_micro_mode, has_print_wheel,
157 row_addr_glitch, semi_auto_right_margin, cpi_changes_res,
159 Numeric: buffer_capacity, dot_horz_spacing, dot_vert_spacing,
160 max_micro_address, max_micro_jump, micro_col_size,
161 micro_line_size, number_of_pins, output_res_char,
162 output_res_line, output_res_horz_inch, print_rate,
163 wide_char_size, bit_image_entwining, bit_image_type.
164 String: down_half_line, form_feed, up_half_line, set_left_margin,
165 set_right_margin, clear_margins, change_char_pitch
166 ... set_page_length (all the SVr4 printer caps),
168 Curses doesn't use these.
170 C. Printer-control capabilities:
172 Boolean: prtr_silent.
173 Strings: print_screen, prtr_on, prtr_off, prtr_non.
175 Curses doesn't use these.
179 Strings: hangup, dial_phone, quick_dial, tone, pulse, flash_hook,
180 fixed_pause, wait_tone.
182 Curses doesn't use these.
184 E. Window and virtual-terminal capabilities:
186 Numerics: maximum_windows, virtual_terminal.
187 Strings: req_for_input, create_window, goto_window, set_window.
189 These seem to be fossils from some AT&T experiments on character-based
190 window systems that never escaped the lab. The virtual_terminal cap had
191 something to do with building terminal emulations into tty line disciplines.
193 F. Unused VDT capabilities:
195 Booleans: erase_overstrike, has_meta_key, insert_null_glitch,
196 move_insert, dest_tabs_magic_smso, transparent_underline,
197 needs_xon_xoff, hard_cursor.
198 Numerics: lines_of_memory, buttons.
199 Strings: pkey_key, pkey_local, pkey_xmit, underline_char,
200 enter_xon_mode, exit_xon_mode, xon_character, xoff_character,
201 display_clock, remove_clock, user[0-5], display_pc_char,
202 enter_scancode_mode, exit_scancode_mode, pc_term_options,
203 scancode_escape, alt_scancode_esc.
205 These are the potentially important ones for ncurses. Notes:
207 i) ncurses doesn't need move_insert; it never uses cup/hpa/vpa while
210 ii) We probably don't care about dest_tabs_magic_smso; only
211 Telerays used it and they're all long obsolete.