view upmana/mercurial/templater.py @ 217:c719a07cd28d beta

Traipse Beta 'OpenRPG' {100430-01} Traipse is a distribution of OpenRPG that is designed to be easy to setup and go. Traipse also makes it easy for developers to work on code without fear of sacrifice. 'Ornery-Orc' continues the trend of 'Grumpy' and adds fixes to the code. 'Ornery-Orc's main goal is to offer more advanced features and enhance the productivity of the user. Update Summary (Patch-2) New Features: New Namespace method with two new syntaxes New Namespace Internal is context sensitive, always! New Namespace External is 'as narrow as you make it' New Namespace FutureCheck helps ensure you don't receive an incorrect node New PluginDB access for URL2Link plugin New to Forms, they now show their content in Design Mode New to Update Manager, checks Repo for updates on software start New to Mini Lin node, change title in design mode Fixes: Fix to Server GUI startup errors Fix to Server GUI Rooms tab updating Fix to Chat and Settings if non existant die roller is picked Fix to Dieroller and .open() used with .vs(). Successes are correctly calculated Fix to Alias Lib's Export to Tree, Open, Save features Fix to alias node, now works properly Fix to Splitter node, minor GUI cleanup Fix to Backgrounds not loading through remote loader Fix to Node name errors Fix to rolling dice in chat Whispers Fix to Splitters Sizing issues Fix to URL2Link plugin, modified regex compilation should remove memory leak Fix to mapy.py, a roll back due to zoomed grid issues Fix to whiteboard_handler, Circles work by you clicking the center of the circle Fix to Servers parse_incoming_dom which was outdated and did not respect XML Fix to a broken link in the server welcome message Fix to InterParse and logger requiring traceback Fix to Update Manager Status Bar Fix to failed image and erroneous pop up Fix to Mini Lib node that was preventing use Fix to plugins that parce dice but did not call InterParse Fix to nodes for name changing by double click Fix to Game Tree, node ordering on drag and drop corrected Daily-01: Again forgot the version number Files affect in last update: Currently selected branch: beta Author: sirebral Files Modified (in update): orpg/chat/commands.py orpg/gametree/gametree.py orpg/gametree/nodehandlers/containers.py orpg/gametree/nodehandlers/minilib.py orpg/pluginhandler.py plugins/xxhiddendice.py plugins/xxsimpleinit.py
author sirebral
date Fri, 30 Apr 2010 05:44:05 -0500
parents dcf4fbe09b70
children
line wrap: on
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# 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\|%]+)#')

    def __init__(self, loader, filters={}, defaults={}):
        self.loader = loader
        self.filters = filters
        self.defaults = defaults
        self.cache = {}

    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 _format(self, expr, get, map):
        key, format = expr.split('%')
        v = get(key)
        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)

    def _filter(self, expr, get, map):
        if expr not in self.cache:
            parts = expr.split('|')
            val = parts[0]
            try:
                filters = [self.filters[f] for f in parts[1:]]
            except KeyError, i:
                raise SyntaxError(_("unknown filter '%s'") % i[0])
            def apply(get):
                    x = get(val)
                    for f in filters:
                        x = f(x)
                    return x
            self.cache[expr] = apply
        return self.cache[expr](get)

    def _process(self, tmpl, map):
        '''Render a template. Returns a generator.'''

        def get(key):
            v = map.get(key)
            if v is None:
                v = self.defaults.get(key, '')
            if hasattr(v, '__call__'):
                v = v(**map)
            return v

        while tmpl:
            m = self.template_re.search(tmpl)
            if not m:
                yield tmpl
                break

            start, end = m.span(0)
            variants = m.groups()
            expr = variants[0] or variants[1]

            if start:
                yield tmpl[:start]
            tmpl = tmpl[end:]

            if '%' in expr:
                yield self._format(expr, get, map)
            elif '|' in expr:
                yield self._filter(expr, get, map)
            else:
                yield get(expr)

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)