This page describes a modification to Wikit to add a "Preview" button to the editing page in the web interface. I (sm) have not tried it with caching of pages, but it works great without the caching.
Below is a context diff of the change. It is to the file web.tcl, version dated 2004-01-10.
*** web.tcl.old Fri Jan 23 13:08:45 2004
--- web.tcl Fri Jan 23 13:16:14 2004
***************
*** 280,285 ****
--- 280,290 ----
SavePage $N $C $host $name
}
# end of change, 03-09-2003
+ # If a preview of the saved page is requested, generate
+ # that page instead.
+ if {$editAction == "Preview"} {
+ set cmd Preview
+ }
mk::file commit wdb
# a general improvement: redirect through a fetch again
***************
*** 387,393 ****
}
cgi_body bgcolor=#ffffff {
! cgi_h2 [Wiki - $N]
cgi_form $::script_name/$N {
cgi_export O=$origtag
--- 392,398 ----
}
cgi_body bgcolor=#ffffff {
! cgi_h2 "Edit $name"
cgi_form $::script_name/$N {
cgi_export O=$origtag
***************
*** 401,408 ****
p
# thx Alistair Grant, see https://wiki.tcl-lang.org/9747
#submit_button "= Save "
- # Create Save and Cancel buttons
submit_button "Action=Save"
cgi_puts " [nbspace] "
submit_button "Action=Cancel"
--- 406,415 ----
p
# thx Alistair Grant, see https://wiki.tcl-lang.org/9747
#submit_button "= Save "
+ # Create Preview, Save, and Cancel buttons
+ submit_button "Action=Preview"
+ cgi_puts " [nbspace] "
submit_button "Action=Save"
cgi_puts " [nbspace] "
submit_button "Action=Cancel"
***************
*** 418,423 ****
--- 425,485 ----
}
}
+ Preview { # called to generate a preview page
+ cgi_head {
+ cgi_http_equiv Content-type "text/html; charset=utf-8"
+ cgi_title "Preview of $name"
+ cgi_meta name=robots content=noindex,nofollow
+ cgi_http_equiv Pragma no-cache
+ cgi_http_equiv Expire "Mon, 04 Dec 1999 21:29:02 GMT"
+ stylesheet
+ if {$N != "2" && [info exists ::env(WIKIT_BASE)]} {
+ cgi_base href=$::env(WIKIT_BASE)
+ }
+ }
+
+ cgi_body bgcolor=#ffffff {
+ cgi_h2 "Preview of $name"
+
+ set U ""
+ foreach {Content U} [Expand_HTML $C] break
+ p $Content
+
+ hr noshade
+
+ cgi_h2 "Re-edit $name"
+ p
+
+ cgi_form $::script_name/$N {
+ cgi_export O=$origtag
+ catch {
+ set z "http://$::env(HTTP_HOST)$::env(REDIRECT_URL)"
+ regsub {@$} $z {} z
+ cgi_export Z=$z
+ }
+ textarea C=$C rows=30 cols=72 wrap=virtual \
+ style=width:100%
+ p
+ # thx Alistair Grant, see https://wiki.tcl-lang.org/9747
+ #submit_button "= Save "
+ # Create Preview, Save, and Cancel buttons
+ submit_button "Action=Preview"
+ cgi_puts " [nbspace] "
+ submit_button "Action=Save"
+ cgi_puts " [nbspace] "
+ submit_button "Action=Cancel"
+ # end of change, 03-09-2003
+ if {$date != 0} {
+ cgi_puts " [nbspace] [nbspace] [nbspace] "
+ cgi_puts [italic "Last saved on [bold $date]"]
+ }
+ p
+ cgi_puts $::EditInstructions
+ }
+
+ }
+ }
+
! { # called to generate a page with references
cgi_head {MHo: Wouldn't it be nice to add this function as a standard feature?
rpremuz: Yes, it would be really nice. With this feature you could check appearance of changes while editing a page without the need to save it. I guess that this way a page would have a smaller number of revisions.
DKF: It is part of this wiki.