Wed Sep  7 06:25:28 UTC 2005  Alberto Bertogli <albertogli@telpin.com.ar>
  * Support darcs-style diff output.
diff -rN -u old-darcsweb/darcsweb.cgi new-darcsweb/darcsweb.cgi
--- old-darcsweb/darcsweb.cgi	2015-10-27 15:24:08.000000000 +0000
+++ new-darcsweb/darcsweb.cgi	2015-10-27 15:24:08.000000000 +0000
@@ -284,24 +284,37 @@
 
 	print "<br/>"
 
-	if action in ("commitdiff", "filediff", "headdiff", "headfilediff"):
+	efaction = action
+	if '_' in action:
+		# action is composed as "format_action", like
+		# "darcs_commitdiff"; so we get the "effective action" to
+		# decide if we need to present the "alternative formats" menu
+		pos = action.find('_')
+		fmt = action[:pos]
+		efaction = action[pos + 1:]
+	if efaction in ("commitdiff", "filediff", "headdiff", "headfilediff"):
 		# show the alternative patch formats
 		params = 'h=%s;' % h
 		if f:
 			params += 'f=%s;' % f
 
-		# plain first
+		# normal (unified)
 		print """
-<a class="link" href="%(myreponame)s;a=plain_%(act)s;%(params)s">plain</a>
-		""" % { "myreponame": config.myreponame, "act": action,
+<a class="link" href="%(myreponame)s;a=%(act)s;%(params)s">unified</a>
+		""" % { "myreponame": config.myreponame, "act": efaction,
+			"params": params }
+
+		# plain
+		print """
+| <a class="link" href="%(myreponame)s;a=plain_%(act)s;%(params)s">plain</a>
+		""" % { "myreponame": config.myreponame, "act": efaction,
 			"params": params }
 
 		# darcs, htmlized
-		# TODO: not yet
-#		print """
-#| <a class="link" href="%(myreponame)s;a=darcs_%(act)s;%(params)s">darcs</a>
-#		""" % { "myreponame": config.myreponame, "act": action,
-#			"params": params }
+		print """
+| <a class="link" href="%(myreponame)s;a=darcs_%(act)s;%(params)s">darcs</a>
+		""" % { "myreponame": config.myreponame, "act": efaction,
+			"params": params }
 
 		# darcs, raw, if available; and only for commitdiff
 		realf = filter_file(config.repodir + '/_darcs/patches/' + h)
@@ -309,7 +322,7 @@
 			print """
 | <a class="link" href="%(myreponame)s;a=raw_%(act)s;%(params)s">raw</a>
 			""" % { "myreponame": config.myreponame,
-				"act": action, "params": params }
+				"act": efaction, "params": params }
 
 	elif f and action == "headblob":
 		# show the only alternative format: plain
@@ -588,6 +601,17 @@
 	dsrc = gzip.open(realf)
 	return dsrc
 
+def get_darcs_diff(hash, fname = None):
+	cmd = 'changes -v --matches "hash %s"' % hash
+	if fname:
+		cmd += ' "%s"' % fname
+	return run_darcs(cmd)
+
+def get_darcs_headdiff(hash, fname = None):
+	cmd = 'changes -v --from-match "hash %s"' % hash
+	if fname:
+		cmd += ' "%s"' % fname
+	return run_darcs(cmd)
 
 #
 # specific html functions
@@ -603,7 +627,7 @@
 
 		if l.startswith('diff'):
 			# file lines, they have their own class
-			print '<div class="diff_info">%s</div>' % l
+			print '<div class="diff_info">%s</div>' % escape(l)
 			continue
 
 		color = ""
@@ -619,6 +643,26 @@
 		print '<div class="pre" %s>' % color + escape(l) + '</div>'
 
 
+def print_darcs_diff(dsrc):
+	for l in dsrc:
+		l = l.decode(config.repoencoding, 'replace').encode('utf-8')
+
+		if not l.startswith("    "):
+			# comments and normal stuff
+			print '<div class="pre">' + escape(l) + "</div>"
+			continue
+
+		l = l.strip()
+
+		if l[0] == '+':
+			cl = 'class="pre" style="color:#008800;"'
+		elif l[0] == '-':
+			cl = 'class="pre" style="color:#cc0000;"'
+		else:
+			cl = 'class="diff_info"'
+		print '<div %s>' % cl + escape(l) + '</div>'
+
+
 def print_shortlog(last = 50, topi = 0, fname = None):
 	ps = get_last_patches(last, topi, fname)
 
@@ -820,8 +864,22 @@
 		sys.stdout.write(l)
 
 def do_darcs_commitdiff(phash):
-	print_plain_header()
-	print "Not yet implemented"
+	print_header()
+	print_navbar(h = phash)
+	p = get_patch(phash)
+	print """
+<div>
+  <a class="title" href="%(myreponame)s;a=commit;h=%(hash)s">%(name)s</a>
+</div>
+	""" % {
+		'myreponame': config.myreponame,
+		'hash': p.hash,
+		'name': p.name,
+	}
+
+	dsrc = get_darcs_diff(phash)
+	print_darcs_diff(dsrc)
+	print_footer()
 
 def do_raw_commitdiff(phash):
 	print_plain_header()
@@ -859,8 +917,29 @@
 		sys.stdout.write(l)
 
 def do_darcs_headdiff(phash):
+	print_header()
+	print_navbar(h = phash)
+	p = get_patch(phash)
+	print """
+<div>
+  <a class="title" href="%(myreponame)s;a=commit;h=%(hash)s">
+    %(name)s --&gt; to head</a>
+</div>
+	""" % {
+		'myreponame': config.myreponame,
+		'hash': p.hash,
+		'name': p.name,
+	}
+
+	dsrc = get_darcs_headdiff(phash)
+	print_darcs_diff(dsrc)
+	print_footer()
+
+def do_raw_headdiff(phash):
 	print_plain_header()
-	print "Not yet implemented"
+	dsrc = get_darcs_headdiff(phash)
+	for l in dsrc:
+		sys.stdout.write(l)
 
 
 def do_filediff(phash, fname):
@@ -890,8 +969,24 @@
 		sys.stdout.write(l)
 
 def do_darcs_filediff(phash, fname):
-	print_plain_header()
-	print "Not yet implemented"
+	print_header()
+	print_navbar(h = phash)
+	p = get_patch(phash)
+	print """
+<div>
+  <a class="title" href="%(myreponame)s;a=commit;h=%(hash)s">%(name)s</a>
+</div>
+<div class="page_path"><b>%(fname)s</b></div>
+	""" % {
+		'myreponame': config.myreponame,
+		'hash': p.hash,
+		'name': p.name,
+		'fname': fname,
+	}
+
+	dsrc = get_darcs_diff(phash, fname)
+	print_darcs_diff(dsrc)
+	print_footer()
 
 
 def do_file_headdiff(phash, fname):
@@ -922,6 +1017,26 @@
 		sys.stdout.write(l)
 
 def do_darcs_fileheaddiff(phash, fname):
+	print_header()
+	print_navbar(h = phash)
+	p = get_patch(phash)
+	print """
+<div>
+  <a class="title" href="%(myreponame)s;a=commit;h=%(hash)s">
+    %(name)s --&gt; to head</a>
+</div>
+<div class="page_path"><b>%(fname)s</b></div>
+	""" % {
+		'myreponame': config.myreponame,
+		'hash': p.hash,
+		'name': p.name,
+		'fname': fname,
+	}
+
+	dsrc = get_darcs_headdiff(phash, fname)
+	print_darcs_diff(dsrc)
+	print_footer()
+
 	print_plain_header()
 	print "Not yet implemented"
 
@@ -1434,7 +1549,8 @@
 	do_plain_filediff(phash, fname)
 elif action == "darcs_filediff":
         phash = filter_hash(form["h"].value)
-        do_darcs_filediff(phash)
+	fname = filter_file(form["f"].value)
+	do_darcs_filediff(phash, fname)
 
 elif action == 'headfilediff':
 	phash = filter_hash(form["h"].value)
@@ -1446,7 +1562,8 @@
 	do_plain_fileheaddiff(phash, fname)
 elif action == "darcs_headfilediff":
         phash = filter_hash(form["h"].value)
-        do_darcs_fileheaddiff(phash)
+	fname = filter_file(form["f"].value)
+        do_darcs_fileheaddiff(phash, fname)
 
 
 elif action == "shortlog":