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Diffstat (limited to 'ncurses-5.9/TO-DO')
| -rw-r--r-- | ncurses-5.9/TO-DO | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/ncurses-5.9/TO-DO b/ncurses-5.9/TO-DO new file mode 100644 index 0000000..509ae8c --- /dev/null +++ b/ncurses-5.9/TO-DO @@ -0,0 +1,213 @@ +------------------------------------------------------------------------------- +-- Copyright (c) 1998-2010,2011 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. -- +------------------------------------------------------------------------------- +-- $Id$ +------------------------------------------------------------------------------- + +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. + ++ the configure --disable-ext-funcs option does not work for Ada95 tree. + ++ the --with-pthread configuration builds for Cygwin, but does not work + properly (test/worm.c shows all of the worms in the same location). + ++ the --enable-rpath configure option builds for the corresponding platforms; + however combining it with --with-ticlib and --with-termlib does not always + produce libraries that can be run without setting environment variables. + Building those with libtool does not work either. (This is a problem with + the BSD platforms). + ++ more work is needed to make the MinGW port support ordinary terminals. + +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 using one of the 4.4BSD derivatives like such as, NetBSD, or BSDI, or + systems using that convention. 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). Many newer systems do no have varargs.h, instead they have + only 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 system old enough not to have a native vsscanf(3) in its + library, vwscanw() will not work. 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. + +-- vile:txtmode |