# 
# 
# patch "common.py"
#  from [02468252bf61578b2443ee7b77fceb7207136127]
#    to [1462ca963d4b3959019bb0ac26a5311f6f2bd406]
# 
============================================================
--- common.py	02468252bf61578b2443ee7b77fceb7207136127
+++ common.py	1462ca963d4b3959019bb0ac26a5311f6f2bd406
@@ -47,3 +47,161 @@ def ago(event):
         rv = "%s" % (plural(minutes, "minute", "minutes"))
     return rv
 
+def link(mt, link_type, link_to, description = None, no_quote = False):
+    hq = html_escape()
+    if not no_quote and description != None: description = hq(description)
+    if link_type == "revision":
+	rv = '<a href="revision.psp?id=%s">' % (urllib.quote(link_to))
+	if description != None: rv += description
+	else: rv +=  hq(link_to[:8]) + ".."
+	rv += '</a>'
+	if description == None: rv = '[' + rv + ']'
+    elif link_type == "diff" or link_type == "download_diff":
+	link_to = map(urllib.quote, filter(lambda x: x != None, link_to))
+	if link_type == "diff":
+	    handler = "diff.psp"
+	else:
+	    handler = "getdiff.py"
+	uri = '%s?id1=%s&amp;id2=%s' % (handler, link_to[0], link_to[1])
+	if len(link_to) == 3:
+	    uri += '&amp;fname=%s' % (link_to[2])
+	rv = '<a href="' + uri + '">'
+	if description != None: rv += description
+	else: rv += "diff"
+	rv += '</a>'
+    elif link_type == "download":
+	if type(link_to) == type([]):
+	    rv = '<a href="getfile.py?id=%s&amp;path=%s">' % (urllib.quote(link_to[0]), 
+							      urllib.quote(link_to[1]))
+	    link_id = link_to[0]
+	else:
+	    rv = '<a href="getfile.py?id=%s">' % (urllib.quote(link_to))
+	    link_id = link_to
+	if description != None: rv += description + "</a>"
+	else: rv = "[" + rv + hq(link_id[:8]) + ".." + "</a>]"
+    elif link_type == "file":
+	revision_id, path = link_to
+	rv = '<a href="file.psp?id=%s&amp;path=%s">' % (urllib.quote(revision_id), 
+							urllib.quote(path))
+	if description != None: rv += description + "</a>"
+	else: rv = "[" + rv + hq(path + '@' + revision_id[:8]) + ".." + "</a>]"
+    elif link_type == "fileinbranch":
+	branch, path = link_to
+	rv = '<a href="fileinbranch.psp?branch=%s&amp;path=%s">' % (urllib.quote(branch), 
+								    urllib.quote(path))
+	if description != None: rv += description + "</a>"
+	else: rv = "[" + rv + hq(path + '@' + branch) + "</a>]"
+    elif link_type == "branch":
+	rv = '<a href="branch.psp?branch=%s">' % (urllib.quote(link_to))
+	if description != None: rv += description
+	else: rv +=  hq(link_to)
+	rv += '</a>'
+    elif link_type == "tar":
+	rv = '<a href="gettar.py?id=%s">' % (urllib.quote(link_to))
+	if description != None: rv += description
+	else: rv = "tar of [" + rv + hq(link_to[:8]) + "..]" + "</a>]"
+	rv += '</a>'
+    elif link_type == "headofbranch":
+	rv = '<a href="headofbranch.psp?branch=%s">' % (urllib.quote(link_to))
+	if description != None: rv += description
+	else: rv +=  "head of " + hq(link_to)
+	rv += '</a>'
+    elif link_type == "manifest":
+	if type(link_to) == type([]):
+	    link_to, path = link_to
+	    rv = '<a href="manifest.psp?id=%s&amp;path=%s">' % (urllib.quote(link_to), urllib.quote(path))
+	else:
+	    rv = '<a href="manifest.psp?id=%s">' % (urllib.quote(link_to))
+	if description != None: rv += description
+	else: rv +=  hq(link_to[:8]) + ".."
+	rv += '</a>'
+	if description == None: rv = '[' + rv + ']'
+    else:
+	rv = '<span style="color:red;">Unknown link type: %s</span>' % (hq(link_type))
+    return '<span class="%s">%s</span>' % (hq(link_type+'Link'), rv)
+
+def html_escape():
+    "returns a function stolen from pydoc that can be used to escape HTML"
+    return lambda x: type_wrapper(escape_function, x)
+
+from enscriptlangs import enscript_langs
+from utility import run_command
+import mimetypes
+import config
+import pipes
+
+# is it binary?
+def is_binary(str):
+    nontext_chars = "\x01\x02\x03\x04\x05\x06\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1c\x1d\x1e\x1f"
+    check = {}
+    for char in nontext_chars:
+	check[char] = True
+	for i in str:
+	    if check.has_key(i): return True
+    return False
+
+# hm, later on might make this be some javascript that does an call back to the server.
+# then could have a pull down to let people choose which enscript encoding to use, and 
+# just update the DOM with the new data.
+def colourise_code(req, hq, matching_file_id, path, contents, filter=None):
+    mime_type = mimetypes.guess_type(path)[0]
+    if mime_type == None: mime_type = 'text/plain'
+    if mime_type == 'image/png' or mime_type == 'image/jpeg' or mime_type == 'image/gif':
+	display_as_image = True
+    else: display_as_image = False
+    
+    # okay; can we guess a valid enscript filter to run this through?
+    tsp = mime_type.split('/', 1)
+    if filter == None and tsp[0] == 'text':
+	candidate = tsp[1]
+	if candidate.startswith('x-'): candidate = candidate[2:]
+	if candidate.endswith('src'): candidate = candidate[:-3]
+	if candidate.endswith('hdr'): candidate = candidate[:-3]
+	if candidate == 'c++': candidate = 'cpp' # ugly
+	if candidate in enscript_langs: filter = candidate
+    if filter == None:
+	# heh, will at least work for lua files
+	last_dot = path.rfind('.')
+	if last_dot == -1: last_dot = 0
+	candidate = path[last_dot:]
+	if candidate in enscript_langs: filter = candidate
+
+    # if no filter then let's check if it's binary or not; if not binary 
+    # we'll just treat it as text; otherwise display a warning and a download 
+    # link
+    if filter == None and not is_binary(contents):
+	filter = 'text'
+
+    req.write('''<div style="border-color: black; border-style: solid; border-width: 1px; padding-left: 0.5em; padding-right: 0.5em;">''')
+    if display_as_image:
+	req.write('''<img border='0' src='getfile.py?id=%s&path=%s' />''' % (urllib.quote(matching_file_id), urllib.quote(path)))
+    elif filter != None:
+	def start_code():
+	    req.write('<PRE style="padding: 0;">')
+	def stop_code():
+	    req.write('</PRE>')
+	def text():
+	    start_code()
+	    req.write(hq(contents))
+	    stop_code()
+	def enscript():
+	    command = config.enscript_path + ' -o - --color --language=html'
+	    command += ' --highlight=%s' % (pipes.quote(filter))
+	    result = run_command(command, to_child=contents)
+	    if result['exitcode'] != 0:
+		raise Exception('Error running enscript (%s) : "%s".' % (hq(command), hq(result['childerr'])))
+	    in_contents = False
+	    for line in result['fromchild'].split('\n'):
+		if line.startswith('<PRE>'):
+		    in_contents = True
+		    start_code()
+		elif line.startswith('</PRE>'): 
+		    in_contents = False
+		    stop_code()
+		elif in_contents:
+		    req.write(line + '\r\n')
+	if filter == "text": text()
+	else: enscript()
+    else:
+	req.write('''<p style="text-align: center"><em>This file seems to binary and not suitable for display in the browser. You must %s the file and use a suitable viewer.</em></p>''' % (link("download", [matching_file_id, path], "download")))
+    req.write('''</div>''')