[Lynx-dev] FW: [emacspeak The Complete Audio Desktop] Emacspeak: Connecting Lynx And W3

[Lloyd Rasmussen]

FYI.  Here's an example of use of Lynx as a fallback option in T.V. Raman's
talking EMACS system.  I hope that the bounce + Outlook don't mess up the
code embedded below. 

-----Original Message-----
From: T. V. Raman (by way of Lloyd Rasmussen <address@hidden>)
[mailto:address@hidden 
Sent: Friday, February 24, 2006 8:33 AM
To: address@hidden
Subject: [emacspeak The Complete Audio Desktop] Emacspeak: Connecting Lynx
And W3 


Emacs/W3 is still the best Web page rendering option inside Emacspeak given 
the ability to apply XSL transforms, as well as obtaining aural styling via 
ACSS. However W3's url handling layer often breaks when faced with multiple 
redirects, especially when some of these happen through the Host: HTTP 
header. Additionally, HTTPS authentication sometimes fails mysteriously in 
the presence of redirects.

In many of these cases, lynx happily fetches the pages correctly; however 
you're then stuck using a fairly weak auditory interface in that Emacspeak 
degrades to being aterminal level screenreader.

An effective solution to this problem is to use lynx within an Emacs 
terminal, and after finding the content that is worth reading, handing off 
that content to Emacs/W3. The next few paragraphs show how.


The lynx-site.cfg File

This is where you add site-specific configurations. Here are the lines I 
have in my lynx-site.cfg to integrate lynx and Emacs. Before you use any of 
this, make sure you have executed M-x server-start in your running Emacs, 
and make sure that all is well by experimenting with emacsclient to ensure 
that external programs can hand-off editting tasks to the currently running 
Emacs.


#site defaults
#for bookshare:
DOWNLOADER:BKS Unpack:bks.pl  %s %s:TRUE
PRINTER:Edit:emacsclient %s:TRUE
KEYMAP:???:EDITTEXTAREA # use external editor to edit a form textarea
PRETTYSRC:TRUE
SOURCE_CACHE:MEMORY
SAVE_SPACE:~/.wget/
BOLD_HEADERS:TRUE
PRINTER:W3:emacsclient -e '(w3-open-local "%s")':TRUE

Below, I'll describe what each of the above lines do:
    * DOWNLOADER:BKS Unpack:bks.pl %s %s:TRUE The above line creates an 
additional item in the download menu that invokes the BookShare unpacker. 
Script bks-unpack.pl invokes the BookShare unpack tool with the appropriate 
options.
    * PRINTER:Edit:emacsclient %s:TRUE This creates an Edit item in the 
print menu. Invoking this menu item causes the current page to be handed 
off to Emacs for editting. If you want to edit the source, first switch to 
source view by hitting \ before invoking print.
    * KEYMAP:???:EDITTEXTAREA# use external editor to edit a form textarea 
This sets lynx up so that when editting a multiline textarea, you can hand 
off the editting job to Emacs. This is particularly useful for editting 
Wiki pages. Replace the ?? with the desired key sequence.
    * PRETTYSRC:TRUE SOURCE_CACHE:MEMORY The above two settings make the 
edit source functionality more pleasant to use.
    * PRINTER:W3:emacsclient -e '(w3-open-local "%s")':TRUE The above 
creates a W3 menu item in the print menu. Invoking this causes Emacs/W3 to 
display the current page --- again switch to source view before invoking 
this so that Emacs/W3 gets handed the HTML markup.


Script bks-unpack.pl


#!/usr/bin/perl -w
#$Id: bks.pl,v 1.1 2003/07/04 15:41:55 tvraman Exp tvraman $
#Description: Bookshare downloader for Lynx
use strict;
my $location="$ENV{HOME}/books/book-share";
my $password = 'xxxxxxx';
my $grabbed = shift;
my $target = shift;
my $dir =qx(basename $target .bks);
chomp $dir;
my $where = "$location/$dir";
qx(mkdir -p $where);
qx(mv $grabbed  $where/$target);
chdir $where;
qx(echo $password | bks-unpack -q $target 1>&- 2>&- &);



--Posted by T. V. Raman to 
<http://emacspeak.blogspot.com/2006/02/emacspeak-connecting-lynx-and-w3.html
>emacspeak 
The Complete Audio Desktop at 2/23/2006 06:58:43 PM 
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