diff options
Diffstat (limited to 'ipl/progs/hotedit.icn')
| -rw-r--r-- | ipl/progs/hotedit.icn | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/ipl/progs/hotedit.icn b/ipl/progs/hotedit.icn new file mode 100644 index 0000000..16f58d4 --- /dev/null +++ b/ipl/progs/hotedit.icn @@ -0,0 +1,101 @@ +############################################################################ +# +# File: hotedit.icn +# +# Subject: Program to edit a Mosaic hotlist +# +# Author: Gregg M. Townsend +# +# Date: June 23, 2000 +# +############################################################################ +# +# This file is in the public domain. +# +############################################################################ +# +# ===> IMPORTANT NOTE: This program was written for "NCSA Mosaic 2.4" +# ===> and is incompatible with the current version of Mosaic. +# +# Hotedit makes it easy to edit the "hotlist" used with NCSA Mosaic, +# a program for grazing the Wide World Web (WWW). The Mosaic hotlist +# is a text file, and it can be edited directly, but this is difficult +# and error-prone. Pairs of lines must be kept together, and the long +# "Uniform Record Locator" (URL) lines make it hard to pick out the +# title lines, which are of more interest. +# +# Hotedit works by extracting the titles, bringing up an editor of the +# user's choice, then processing the results when the editor exits. +# The user can reorder, retitle, or delete lines; adding new entries +# is best done within NCSA Mosaic. It is vital that any editing +# preserve the three-digit number at the front of each line; hotedit +# uses this to reconnect the titles with the corresponding URLs. +# +# The editor is determined by the environment variable VISUAL (or, if +# that is missing, EDITOR). The hotlist file is assumed to be in the +# usual place, $HOME/.mosaic-hotlist-default. Because not all editors +# return a reasonable exit status, the hotlist is *always* rewritten; +# the previous edition is saved in $HOME/.mosaic-hotlist-backup. +# +# Hotedit shouldn't be run while NCSA Mosaic is running; when Mosaic +# exits, it is likely to overwrite the edited hotlist. +# +############################################################################ +# +# Requires: Unix, NCSA Mosaic +# +############################################################################ + +$define TMPFILE "hotlist.tmp" +$define HOTFILE ".mosaic-hotlist-default" +$define HOTOLD ".mosaic-hotlist-backup" +$define HOTNEW ".mosaic-hotlist-revised" +$define HOTFORMAT "ncsa-xmosaic-hotlist-format-1" + +procedure main() + local home, f, t, line, n, editor, command, urllist + + home := getenv("HOME") | stop("no $HOME value") + chdir(home) | stop("can't chdir to ", home) + + f := open(HOTFILE) | stop("can't open ", HOTFILE) + line := read(f) | stop("empty hotlist file") + line == HOTFORMAT | stop("unrecognized hotlist format") + line := read(f) | stop("truncated hotlist file") + line == "Default" | stop("unrecognized hotlist format") + + t := open(TMPFILE, "w") | stop("can't write ", TMPFILE) + + urllist := [] + while put(urllist, read(f)) do { + line := read(f) | stop("ill-formated hotlist file") + if *urllist < 1000 then + n := right(*urllist, 3, "0") + else + n := *urllist + write(t, n, " ", line) + } + close(f) + close(t) + + f := open(HOTNEW, "w") | stop("can't write ", HOTNEW) + + editor := getenv("VISUAL") | getenv("EDITOR") | "/bin/vi" + command := editor || " " || TMPFILE + + system(command) + + t := open(TMPFILE) | stop("can't reopen ", TMPFILE) + write(f, HOTFORMAT) + write(f, "Default") + while line := read(t) do line ? { + if write(f, urllist[tab(many(&digits))]) then + write(f, move(1) & tab(0)) + else + write(&errout, "invalid index: ", line) + } + + remove(HOTOLD) + (rename(HOTFILE, HOTOLD) & rename(HOTNEW, HOTFILE)) | + stop("couldn't rename files; new file left in ", HOTNEW) +end |