CVS log for src/lib/libcurses/curses.c

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Fixes for lib/56926 amongst other things:
 - plod now correctly accounts for wide characters when plodding
 - use erase line when in color mode if the terminal has the capability
 - ensure that the CA_CONTINUATION flag is applied consistently to the
   subsequent characters in a wide character.
 - fix a bunch of refresh bugs that caused inconsistent placement of
   wide characters.

 * Don't redraw the background if the new background character is the
   same as the old one.  This prevents excessive redraws in some
   applications.

 * Fix bug introduced when wbkgrndset was fixed, we cannot blindly
   replace any instance of the old background character with the new one
   because some of those characters were put there by the application
   leading to display corruption.  So flag characters as background when
   they are erased and only update the flagged characters when setting
   the background.

fix for PR 55496

 * Fix bkgrndset so that it actually sets the background character in
   in line with the SUSv2 specification.

 * Add an internal function to copy a complex character

 * Make the previously static celleq function into a libcurses private
   function so that it can be called in other files.

Sync with HEAD

Sync with HEAD

Move ESCDELAY to curses.c so all globals are close to each other.
Remove _reentrant and use ESCDELAY and TABSIZE as we're not really
reentrant.

If either set_escdelay(3) or set_tabsize(3) are called, set _reentrant
to ensure we use the saved value for the sceen.

This effectively makes ESCDELAY and TABSIZE read-only when either
of these functions are called.

Sync with HEAD

remove bogus malloc casts

Rebase to HEAD as of a few days ago.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

Add TABSIZE, which is derived from terminfo init_tabs.
Use this when processing \t.
If TABSIZE is set in the environment, this takes precedence.

Userland now builds and uses terminfo instead of termcap.

OK: core@, jdc@

Prepare curses for the possibility of changing from termcap to terminfo.
term.h #defines lines, pad_char and no_color_video macros which conflict
with existing curses code. We change lines to alines and nlines depending
on use, pad_char to padchar and no_color_video becomes no_color_attributes
but with a strong alias from no_color_video.

Merge in wide curses code done as a Summer of Code project by
Ruibiao Qiu.

Add helper functions to deallocate non-spacing character storage.

Wide curses merge

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Set the curses default colours to white on black when using colour.
See the Single UNIX Specification, Version 2 :

  http://www.opengroup.org/onlinepubs/007908799/xcurses/can_change_color.html

Also, add the functions :

	use_default_colors();
	assume_default_colors(fore, back);

(from ncurses) that allow the terminal default colours or user-specified
default colours to be used.

* Major change to add support for the newterm/set_term functions.
* Added fix to getch.c suggested by Gabriel Rosenkoetter (thanks :-)

Revert the change to the `pc' capability from the previous change.  Pointed
out in email by Thomas Dickey.

Rename variables refering to termcap capabilities from NN to __tc_nn.  Case
adjusted to match termcap capability.  A few other variable names renamed too
(ones related to or derived from termcap variables).

Background colour erase is 'ut' not 'be'.
Add virtual screen for wnoutrefresh()/doupdate().

* Fixed need for duplicate namp string in setterm.c
* Added meta function (turns meta bit on and off on terminal if supported)
* Added curs_set to control cursor visibility if supported.

Multiple fixes:
* Added Bill's fixes for errors when compiling with WARNS=1
* Incorporated fixes to make usage of unctrl consistent in debug and
  made improvements to ctrace - it now timestamps it's output better.
* Reduced the number of mallocs done by __init_getch by allocating key
  structs in bunches instead of singly.
* Removed the shadowing of global declarations in newwin and subwin
  functions

Add colour capabilities and variables.

Made data structures opaque

Add alternate character set support.

Get rid of the evil trailing spaces and tabs.

Upgrades the standard NetBSD curses library to provide some
of the SYSV curses facilities.  The added features are the collapsing
of arrow and function keysequences (as defined by termcap for the
terminal) into symbolic code returns thus relieving the application of
recognising multi-character key sequences.  Other features are the
capability to perform a timed wait for a key (good for when you are
not sure if there is a keypress ready or not) and the capability for
turning off the inter-key timeout when assembling multi-character
function keys.

this work was done by Julian Coleman <J.D.Coleman@newcastle.ac.uk>
and blymn@baea.com.au (Brett Lymn).  i'm just integrating it.  thanks
HEAPS guys!

RCSid police, fix warnings

clean up import

file curses.c was added on branch netbsd-1-0 on 1994-08-17 21:52:08 +0000

clean up import

new libcurses, from new nvi

changes from branch

minor fixups

update from branch

update from latest

repeat after me: "I hate rcs ids"

update to new version from berkeley.  doesn't compile yet, nor
does it have rcsid's.  this is for diffs.

New version from uunet.

Add RCS identifiers.

initial import of 386bsd-0.1 sources

Initial revision