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hgweb: update canvas.width before dynamically redrawing graph (issue2683)...
hgweb: update canvas.width before dynamically redrawing graph (issue2683) After 91ac8cb79125 graph canvas width is decided once on the initial rendering. However, after graph page gets scrolled down to load more, it might need more horizontal space to draw, so it needs to resize the canvas dynamically. The exact problem that this patch solves can be seen using: hg init testfork cd testfork echo 0 > foo hg ci -Am0 echo 1 > foo hg ci -m1 hg up 0 echo 2 > foo hg ci -m2 hg gl -T '{rev}\n' @ 2 | | o 1 |/ o 0 hg serve And then by navigating to http://127.0.0.1:8000/graph/tip?revcount=1 "revcount=1" makes sure the initial graph contains only revision 2. And because the initial canvas width takes only that one revision into count, after the (immediate) AJAX update revision 1 will be cut off from the graph. We can safely set canvas width to the new value we get from the AJAX request because every time graph is updated, it is completely redrawn using all the requested nodes (in the case above it will use /graph/2?revcount=61), so the value is guaranteed not to decrease. P.S.: Sorry for parsing HTML with regexes, but I didn't start it.

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protocol.py
110 lines | 3.2 KiB | text/x-python | PythonLexer
#
# Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import cStringIO
import cgi
import urllib
import zlib
from .common import (
HTTP_OK,
)
from .. import (
util,
wireproto,
)
HGTYPE = 'application/mercurial-0.1'
HGERRTYPE = 'application/hg-error'
class webproto(wireproto.abstractserverproto):
def __init__(self, req, ui):
self.req = req
self.response = ''
self.ui = ui
def getargs(self, args):
knownargs = self._args()
data = {}
keys = args.split()
for k in keys:
if k == '*':
star = {}
for key in knownargs.keys():
if key != 'cmd' and key not in keys:
star[key] = knownargs[key][0]
data['*'] = star
else:
data[k] = knownargs[k][0]
return [data[k] for k in keys]
def _args(self):
args = self.req.form.copy()
chunks = []
i = 1
while True:
h = self.req.env.get('HTTP_X_HGARG_' + str(i))
if h is None:
break
chunks += [h]
i += 1
args.update(cgi.parse_qs(''.join(chunks), keep_blank_values=True))
return args
def getfile(self, fp):
length = int(self.req.env['CONTENT_LENGTH'])
for s in util.filechunkiter(self.req, limit=length):
fp.write(s)
def redirect(self):
self.oldio = self.ui.fout, self.ui.ferr
self.ui.ferr = self.ui.fout = cStringIO.StringIO()
def restore(self):
val = self.ui.fout.getvalue()
self.ui.ferr, self.ui.fout = self.oldio
return val
def groupchunks(self, cg):
z = zlib.compressobj()
while True:
chunk = cg.read(4096)
if not chunk:
break
yield z.compress(chunk)
yield z.flush()
def _client(self):
return 'remote:%s:%s:%s' % (
self.req.env.get('wsgi.url_scheme') or 'http',
urllib.quote(self.req.env.get('REMOTE_HOST', '')),
urllib.quote(self.req.env.get('REMOTE_USER', '')))
def iscmd(cmd):
return cmd in wireproto.commands
def call(repo, req, cmd):
p = webproto(req, repo.ui)
rsp = wireproto.dispatch(repo, p, cmd)
if isinstance(rsp, str):
req.respond(HTTP_OK, HGTYPE, body=rsp)
return []
elif isinstance(rsp, wireproto.streamres):
req.respond(HTTP_OK, HGTYPE)
return rsp.gen
elif isinstance(rsp, wireproto.pushres):
val = p.restore()
rsp = '%d\n%s' % (rsp.res, val)
req.respond(HTTP_OK, HGTYPE, body=rsp)
return []
elif isinstance(rsp, wireproto.pusherr):
# drain the incoming bundle
req.drain()
p.restore()
rsp = '0\n%s\n' % rsp.res
req.respond(HTTP_OK, HGTYPE, body=rsp)
return []
elif isinstance(rsp, wireproto.ooberror):
rsp = rsp.message
req.respond(HTTP_OK, HGERRTYPE, body=rsp)
return []