|
|
# templater.py - template expansion for output
|
|
|
#
|
|
|
# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2, incorporated herein by reference.
|
|
|
|
|
|
from i18n import _
|
|
|
import re, sys, os
|
|
|
import util, config, templatefilters
|
|
|
|
|
|
path = ['templates', '../templates']
|
|
|
stringify = templatefilters.stringify
|
|
|
|
|
|
def parsestring(s, quoted=True):
|
|
|
'''parse a string using simple c-like syntax.
|
|
|
string must be in quotes if quoted is True.'''
|
|
|
if quoted:
|
|
|
if len(s) < 2 or s[0] != s[-1]:
|
|
|
raise SyntaxError(_('unmatched quotes'))
|
|
|
return s[1:-1].decode('string_escape')
|
|
|
|
|
|
return s.decode('string_escape')
|
|
|
|
|
|
class engine(object):
|
|
|
'''template expansion engine.
|
|
|
|
|
|
template expansion works like this. a map file contains key=value
|
|
|
pairs. if value is quoted, it is treated as string. otherwise, it
|
|
|
is treated as name of template file.
|
|
|
|
|
|
templater is asked to expand a key in map. it looks up key, and
|
|
|
looks for strings like this: {foo}. it expands {foo} by looking up
|
|
|
foo in map, and substituting it. expansion is recursive: it stops
|
|
|
when there is no more {foo} to replace.
|
|
|
|
|
|
expansion also allows formatting and filtering.
|
|
|
|
|
|
format uses key to expand each item in list. syntax is
|
|
|
{key%format}.
|
|
|
|
|
|
filter uses function to transform value. syntax is
|
|
|
{key|filter1|filter2|...}.'''
|
|
|
|
|
|
template_re = re.compile(r"(?:(?:#(?=[\w\|%]+#))|(?:{(?=[\w\|%]+})))"
|
|
|
r"(\w+)(?:(?:%(\w+))|((?:\|\w+)*))[#}]")
|
|
|
|
|
|
def __init__(self, loader, filters={}, defaults={}):
|
|
|
self.loader = loader
|
|
|
self.filters = filters
|
|
|
self.defaults = defaults
|
|
|
|
|
|
def process(self, t, map):
|
|
|
'''Perform expansion. t is name of map element to expand. map contains
|
|
|
added elements for use during expansion. Is a generator.'''
|
|
|
tmpl = self.loader(t)
|
|
|
iters = [self._process(tmpl, map)]
|
|
|
while iters:
|
|
|
try:
|
|
|
item = iters[0].next()
|
|
|
except StopIteration:
|
|
|
iters.pop(0)
|
|
|
continue
|
|
|
if isinstance(item, str):
|
|
|
yield item
|
|
|
elif item is None:
|
|
|
yield ''
|
|
|
elif hasattr(item, '__iter__'):
|
|
|
iters.insert(0, iter(item))
|
|
|
else:
|
|
|
yield str(item)
|
|
|
|
|
|
def _process(self, tmpl, map):
|
|
|
'''Render a template. Returns a generator.'''
|
|
|
while tmpl:
|
|
|
m = self.template_re.search(tmpl)
|
|
|
if not m:
|
|
|
yield tmpl
|
|
|
break
|
|
|
|
|
|
start, end = m.span(0)
|
|
|
key, format, fl = m.groups()
|
|
|
|
|
|
if start:
|
|
|
yield tmpl[:start]
|
|
|
tmpl = tmpl[end:]
|
|
|
|
|
|
if key in map:
|
|
|
v = map[key]
|
|
|
else:
|
|
|
v = self.defaults.get(key, "")
|
|
|
if hasattr(v, '__call__'):
|
|
|
v = v(**map)
|
|
|
if format:
|
|
|
if not hasattr(v, '__iter__'):
|
|
|
raise SyntaxError(_("Error expanding '%s%%%s'")
|
|
|
% (key, format))
|
|
|
lm = map.copy()
|
|
|
for i in v:
|
|
|
lm.update(i)
|
|
|
yield self.process(format, lm)
|
|
|
else:
|
|
|
if fl:
|
|
|
for f in fl.split("|")[1:]:
|
|
|
v = self.filters[f](v)
|
|
|
yield v
|
|
|
|
|
|
engines = {'default': engine}
|
|
|
|
|
|
class templater(object):
|
|
|
|
|
|
def __init__(self, mapfile, filters={}, defaults={}, cache={},
|
|
|
minchunk=1024, maxchunk=65536):
|
|
|
'''set up template engine.
|
|
|
mapfile is name of file to read map definitions from.
|
|
|
filters is dict of functions. each transforms a value into another.
|
|
|
defaults is dict of default map definitions.'''
|
|
|
self.mapfile = mapfile or 'template'
|
|
|
self.cache = cache.copy()
|
|
|
self.map = {}
|
|
|
self.base = (mapfile and os.path.dirname(mapfile)) or ''
|
|
|
self.filters = templatefilters.filters.copy()
|
|
|
self.filters.update(filters)
|
|
|
self.defaults = defaults
|
|
|
self.minchunk, self.maxchunk = minchunk, maxchunk
|
|
|
self.engines = {}
|
|
|
|
|
|
if not mapfile:
|
|
|
return
|
|
|
if not os.path.exists(mapfile):
|
|
|
raise util.Abort(_('style not found: %s') % mapfile)
|
|
|
|
|
|
conf = config.config()
|
|
|
conf.read(mapfile)
|
|
|
|
|
|
for key, val in conf[''].items():
|
|
|
if val[0] in "'\"":
|
|
|
try:
|
|
|
self.cache[key] = parsestring(val)
|
|
|
except SyntaxError, inst:
|
|
|
raise SyntaxError('%s: %s' %
|
|
|
(conf.source('', key), inst.args[0]))
|
|
|
else:
|
|
|
val = 'default', val
|
|
|
if ':' in val[1]:
|
|
|
val = val[1].split(':', 1)
|
|
|
self.map[key] = val[0], os.path.join(self.base, val[1])
|
|
|
|
|
|
def __contains__(self, key):
|
|
|
return key in self.cache or key in self.map
|
|
|
|
|
|
def load(self, t):
|
|
|
'''Get the template for the given template name. Use a local cache.'''
|
|
|
if not t in self.cache:
|
|
|
try:
|
|
|
self.cache[t] = open(self.map[t][1]).read()
|
|
|
except IOError, inst:
|
|
|
raise IOError(inst.args[0], _('template file %s: %s') %
|
|
|
(self.map[t][1], inst.args[1]))
|
|
|
return self.cache[t]
|
|
|
|
|
|
def __call__(self, t, **map):
|
|
|
ttype = t in self.map and self.map[t][0] or 'default'
|
|
|
proc = self.engines.get(ttype)
|
|
|
if proc is None:
|
|
|
proc = engines[ttype](self.load, self.filters, self.defaults)
|
|
|
self.engines[ttype] = proc
|
|
|
|
|
|
stream = proc.process(t, map)
|
|
|
if self.minchunk:
|
|
|
stream = util.increasingchunks(stream, min=self.minchunk,
|
|
|
max=self.maxchunk)
|
|
|
return stream
|
|
|
|
|
|
def templatepath(name=None):
|
|
|
'''return location of template file or directory (if no name).
|
|
|
returns None if not found.'''
|
|
|
normpaths = []
|
|
|
|
|
|
# executable version (py2exe) doesn't support __file__
|
|
|
if hasattr(sys, 'frozen'):
|
|
|
module = sys.executable
|
|
|
else:
|
|
|
module = __file__
|
|
|
for f in path:
|
|
|
if f.startswith('/'):
|
|
|
p = f
|
|
|
else:
|
|
|
fl = f.split('/')
|
|
|
p = os.path.join(os.path.dirname(module), *fl)
|
|
|
if name:
|
|
|
p = os.path.join(p, name)
|
|
|
if name and os.path.exists(p):
|
|
|
return os.path.normpath(p)
|
|
|
elif os.path.isdir(p):
|
|
|
normpaths.append(os.path.normpath(p))
|
|
|
|
|
|
return normpaths
|
|
|
|
|
|
def stylemap(style, paths=None):
|
|
|
"""Return path to mapfile for a given style.
|
|
|
|
|
|
Searches mapfile in the following locations:
|
|
|
1. templatepath/style/map
|
|
|
2. templatepath/map-style
|
|
|
3. templatepath/map
|
|
|
"""
|
|
|
|
|
|
if paths is None:
|
|
|
paths = templatepath()
|
|
|
elif isinstance(paths, str):
|
|
|
paths = [paths]
|
|
|
|
|
|
locations = style and [os.path.join(style, "map"), "map-" + style] or []
|
|
|
locations.append("map")
|
|
|
for path in paths:
|
|
|
for location in locations:
|
|
|
mapfile = os.path.join(path, location)
|
|
|
if os.path.isfile(mapfile):
|
|
|
return mapfile
|
|
|
|
|
|
raise RuntimeError("No hgweb templates found in %r" % paths)
|
|
|
|
