LYNX-DEV Re: "missing highlight on active link"

[Klaus Weide]

On Fri, 22 Aug 1997, RamNarayan S wrote:
> On Thu, 21 Aug 1997, Klaus Weide wrote:
> 
> > If your termcap/terminfo says that reverse and underline CAN be used
> > together, when in reality they can't, then your terminal description is
> > in error.  If the terminal description says that the terminal doesn't
> > support underline, but lynx still emits a control sequence for turning
> > underlining on, then arguably it is an error in lynx or the underlying
> > curses library.  (With Slang it could also be some default assumption
> > about a terminal for which no terminal description is available.)
> 
> The following is my termcap entry for my term `xterm'.
> 
> xterm|vs100|xterm terminal emulator,
>     am, xenl, km,
>     cols#80, it#8, lines#65,
>     bel=^G, cr=\r, csr=\E[%i%p1%d;%p2%dr, tbc=\E[3g,
>     clear=\E[H\E[2J, el=\E[K, ed=\E[J, cup=\E[%i%p1%d;%p2%dH,
>     cud1=\n, home=\E[H, cub1=\b, cuf1=\E[C,
>     cuu1=\E[A, dch1=\E[P, dl1=\E[M, blink=@,
>     bold=\E[1m, rev=\E[7m, smso=\E[7m, sgr0=\E[m,
>     rmso=\E[m, ich1=\E[@, il1=\E[L, kbs=\b,
>     kcud1=\EOB, kf2=\EOQ, kf3=\EOR, kf4=\EOS,
>     kcub1=\EOD, kcuf1=\EOC, kcuu1=\EOA, rmkx=\E[?1l\E>,
>     smkx=\E[?1h\E=, dch=\E[%p1%dP, dl=\E[%p1%dM, cud=\E[%p1%dB,
>     ich=\E[%p1%d@, il=\E[%p1%dL, cub=\E[%p1%dD, cuf=\E[%p1%dC,
>     cuu=\E[%p1%dA, rs1=\E>\E[1;3;4;5;6l\E[?7h\E[m\E[r\E[2J\E[H,
>     address@hidden, rc=\E8, sc=\E7, ind=\n, ri=\EM,
>     sgr=\E[%?%p1%t;7%;%?%p2%t;4%;%?%p3%t;7%;%?%p4%t;5%;%?%p6%t;1%;m,
>     hts=\EH, ht=\t,

(Is the termcap file really what's being used?  Just wondering, because if
you have terminfo files and a termcap file, you may be looking at the
wrong place.)

> I don't see any entry for smul  (underline),  but my curses seems to be able
> to display underlined characters. I use the latest version of ncurses. So,
> ??? (What next ?)

Here is a paragraph from `man 5 terminfo':

       If  there  is  a sequence to set arbitrary combinations of
       modes, this should be given as sgr (set attributes),  tak-
       ing 9 parameters.  Each parameter is either 0 or 1, as the
       corresponding attribute is on or off.   The  9  parameters
       are,  in  order: standout, underline, reverse, blink, dim,
       bold, blank, protect, alternate character  set.   Not  all
       modes  need be supported by sgr, only those for which cor-
       responding separate attribute commands exist.

First, I read that as saying that the presence of a sgr capability means
that modes can be combined, whereas your experience shaows that in your
case the terminal doesn't understand the combination.  SO there shouldn't
be sgr at all.

Second, the sgr string given is inconsistent with the absense of smul -
if underlining is not supported, `p2' should not appear in sgr.

I don't know what ncurses does if you remove the sgr, but it's worth a
try.

> Now for a clarification  on the behaviour of Lynx.  I have a HTML segment as
> follows.
> 
> --->
> <strong><a href="/corweb/dilbert.html">Dilbert!</a></strong> -- Everyone's
> favourite engineer.</p></font>
> 
> To test your Netscape MIME.type configuration, try the following <a
> href="http://47.80.6.114:8080/config_test/config_test.html";><font
> color+"FF0000">Test Page </a></p>
> ---

(I hope you don't mean that abomination looking like a font tag serious.)

> The  highlight  is on the  Dilbert  anchor on entering  the page.  It is the
> first entry in the page.  When I move down from the link towards another, it
> shows  underlining for that anchor (<B>  translates to an underline for me).
> Now  when I  refresh  the page by a ^L, I get a bold  anchor  instead  of an
> underlined  one.  When I walk  over  that  link  again,  I get a  underlined
> anchor.  It is not a problem, but looks kinda funny.

Something like this "forgetting" was normal behavior up to 2.7.1 (at least
when lynx would to combine attributes, as [always?] with slang).  But if
you are seeing this with the current devel code it should be another
effect of your terminal's inability to combine attributes.  

   Klaus

;
; To UNSUBSCRIBE:  Send a mail message to address@hidden
;                  with "unsubscribe lynx-dev" (without the
;                  quotation marks) on a line by itself.
;