code-db8659c4e8eb/roundup/cgi/TAL/DummyEngine.py 0000644 0000000 0000000 00000021074 13303235466 017512 0 ustar 0000000 0000000 ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
# Modifications for Roundup:
# 1. commented out ITALES references
# 2. implemented ustr as str
"""
Dummy TALES engine so that I can test out the TAL implementation.
"""
import re
import sys
from TALDefs import NAME_RE, TALESError, ErrorInfo
#from ITALES import ITALESCompiler, ITALESEngine
#from DocumentTemplate.DT_Util import ustr
ustr = str
IDomain = None
if sys.modules.has_key('Zope'):
try:
from Zope.I18n.ITranslationService import ITranslationService
from Zope.I18n.IDomain import IDomain
except ImportError:
pass
if IDomain is None:
# Before 2.7, or not in Zope
class ITranslationService: pass
class IDomain: pass
class _Default:
pass
Default = _Default()
name_match = re.compile(r"(?s)(%s):(.*)\Z" % NAME_RE).match
class CompilerError(BaseException):
pass
class DummyEngine:
position = None
source_file = None
#__implements__ = ITALESCompiler, ITALESEngine
def __init__(self, macros=None):
if macros is None:
macros = {}
self.macros = macros
dict = {'nothing': None, 'default': Default}
self.locals = self.globals = dict
self.stack = [dict]
self.translationService = DummyTranslationService()
def getCompilerError(self):
return CompilerError
def getCompiler(self):
return self
def setSourceFile(self, source_file):
self.source_file = source_file
def setPosition(self, position):
self.position = position
def compile(self, expr):
return "$%s$" % expr
def uncompile(self, expression):
assert expression.startswith("$") and expression.endswith("$"),expression
return expression[1:-1]
def beginScope(self):
self.stack.append(self.locals)
def endScope(self):
assert len(self.stack) > 1, "more endScope() than beginScope() calls"
self.locals = self.stack.pop()
def setLocal(self, name, value):
if self.locals is self.stack[-1]:
# Unmerge this scope's locals from previous scope of first set
self.locals = self.locals.copy()
self.locals[name] = value
def setGlobal(self, name, value):
self.globals[name] = value
def evaluate(self, expression):
assert expression.startswith("$") and expression.endswith("$"), expression
expression = expression[1:-1]
m = name_match(expression)
if m:
type, expr = m.group(1, 2)
else:
type = "path"
expr = expression
if type in ("string", "str"):
return expr
if type in ("path", "var", "global", "local"):
return self.evaluatePathOrVar(expr)
if type == "not":
return not self.evaluate(expr)
if type == "exists":
return self.locals.has_key(expr) or self.globals.has_key(expr)
if type == "python":
try:
return eval(expr, self.globals, self.locals)
except:
raise TALESError("evaluation error in %s" % `expr`)
if type == "position":
# Insert the current source file name, line number,
# and column offset.
if self.position:
lineno, offset = self.position
else:
lineno, offset = None, None
return '%s (%s,%s)' % (self.source_file, lineno, offset)
raise TALESError("unrecognized expression: " + `expression`)
def evaluatePathOrVar(self, expr):
expr = expr.strip()
if self.locals.has_key(expr):
return self.locals[expr]
elif self.globals.has_key(expr):
return self.globals[expr]
else:
raise TALESError("unknown variable: %s" % `expr`)
def evaluateValue(self, expr):
return self.evaluate(expr)
def evaluateBoolean(self, expr):
return self.evaluate(expr)
def evaluateText(self, expr):
text = self.evaluate(expr)
if text is not None and text is not Default:
text = ustr(text)
return text
def evaluateStructure(self, expr):
# XXX Should return None or a DOM tree
return self.evaluate(expr)
def evaluateSequence(self, expr):
# XXX Should return a sequence
return self.evaluate(expr)
def evaluateMacro(self, macroName):
assert macroName.startswith("$") and macroName.endswith("$"), macroName
macroName = macroName[1:-1]
file, localName = self.findMacroFile(macroName)
if not file:
# Local macro
macro = self.macros[localName]
else:
# External macro
import driver
program, macros = driver.compilefile(file)
macro = macros.get(localName)
if not macro:
raise TALESError("macro %s not found in file %s" %
(localName, file))
return macro
def findMacroDocument(self, macroName):
file, localName = self.findMacroFile(macroName)
if not file:
return file, localName
import driver
doc = driver.parsefile(file)
return doc, localName
def findMacroFile(self, macroName):
if not macroName:
raise TALESError("empty macro name")
i = macroName.rfind('/')
if i < 0:
# No slash -- must be a locally defined macro
return None, macroName
else:
# Up to last slash is the filename
fileName = macroName[:i]
localName = macroName[i+1:]
return fileName, localName
def setRepeat(self, name, expr):
seq = self.evaluateSequence(expr)
return Iterator(name, seq, self)
def createErrorInfo(self, err, position):
return ErrorInfo(err, position)
def getDefault(self):
return Default
def translate(self, domain, msgid, mapping, default=None):
return self.translationService.translate(domain, msgid, mapping,
default=default)
class Iterator:
# This is not an implementation of a Python iterator. The next()
# method returns true or false to indicate whether another item is
# available; if there is another item, the iterator instance calls
# setLocal() on the evaluation engine passed to the constructor.
def __init__(self, name, seq, engine):
self.name = name
self.seq = seq
self.engine = engine
self.nextIndex = 0
def next(self):
i = self.nextIndex
try:
item = self.seq[i]
except IndexError:
return 0
self.nextIndex = i+1
self.engine.setLocal(self.name, item)
return 1
class DummyDomain:
__implements__ = IDomain
def translate(self, msgid, mapping=None, context=None,
target_language=None, default=None):
# This is a fake translation service which simply uppercases non
# ${name} placeholder text in the message id.
#
# First, transform a string with ${name} placeholders into a list of
# substrings. Then upcase everything but the placeholders, then glue
# things back together.
# simulate an unknown msgid by returning None
if msgid == "don't translate me":
text = default
else:
text = msgid.upper()
def repl(m, mapping=mapping):
return ustr(mapping[m.group(m.lastindex).lower()])
cre = re.compile(r'\$(?:(%s)|\{(%s)\})' % (NAME_RE, NAME_RE))
return cre.sub(repl, text)
class DummyTranslationService:
__implements__ = ITranslationService
def translate(self, domain, msgid, mapping=None, context=None,
target_language=None, default=None):
return self.getDomain(domain).translate(msgid, mapping, context,
target_language,
default=default)
def getDomain(self, domain):
return DummyDomain()
code-db8659c4e8eb/roundup/cgi/TAL/HTMLParser.py 0000644 0000000 0000000 00000033010 13303235466 017203 0 ustar 0000000 0000000 """A parser for HTML and XHTML."""
# This file is based on sgmllib.py, but the API is slightly different.
# XXX There should be a way to distinguish between PCDATA (parsed
# character data -- the normal case), RCDATA (replaceable character
# data -- only char and entity references and end tags are special)
# and CDATA (character data -- only end tags are special).
import markupbase
import re
# Regular expressions used for parsing
interesting_normal = re.compile('[&<]')
interesting_cdata = re.compile(r'<(/|\Z)')
incomplete = re.compile('&[a-zA-Z#]')
entityref = re.compile('&([a-zA-Z][-.a-zA-Z0-9]*)[^a-zA-Z0-9]')
charref = re.compile('&#(?:[0-9]+|[xX][0-9a-fA-F]+)[^0-9a-fA-F]')
starttagopen = re.compile('<[a-zA-Z]')
piclose = re.compile('>')
endtagopen = re.compile('')
tagfind = re.compile('[a-zA-Z][-.a-zA-Z0-9:_]*')
attrfind = re.compile(
r'\s*([a-zA-Z_][-.:a-zA-Z_0-9]*)(\s*=\s*'
r'(\'[^\']*\'|"[^"]*"|[-a-zA-Z0-9./:;+*%?!&$\(\)_#=~]*))?')
locatestarttagend = re.compile(r"""
<[a-zA-Z][-.a-zA-Z0-9:_]* # tag name
(?:\s+ # whitespace before attribute name
(?:[a-zA-Z_][-.:a-zA-Z0-9_]* # attribute name
(?:\s*=\s* # value indicator
(?:'[^']*' # LITA-enclosed value
|\"[^\"]*\" # LIT-enclosed value
|[^'\">\s]+ # bare value
)
)?
)
)*
\s* # trailing whitespace
""", re.VERBOSE)
endendtag = re.compile('>')
endtagfind = re.compile('')
class HTMLParseError(BaseException):
"""Exception raised for all parse errors."""
def __init__(self, msg, position=(None, None)):
assert msg
self.msg = msg
self.lineno = position[0]
self.offset = position[1]
def __str__(self):
result = self.msg
if self.lineno is not None:
result = result + ", at line %d" % self.lineno
if self.offset is not None:
result = result + ", column %d" % (self.offset + 1)
return result
def _contains_at(s, sub, pos):
return s[pos:pos+len(sub)] == sub
class HTMLParser(markupbase.ParserBase):
"""Find tags and other markup and call handler functions.
Usage:
p = HTMLParser()
p.feed(data)
...
p.close()
Start tags are handled by calling self.handle_starttag() or
self.handle_startendtag(); end tags by self.handle_endtag(). The
data between tags is passed from the parser to the derived class
by calling self.handle_data() with the data as argument (the data
may be split up in arbitrary chunks). Entity references are
passed by calling self.handle_entityref() with the entity
reference as the argument. Numeric character references are
passed to self.handle_charref() with the string containing the
reference as the argument.
"""
CDATA_CONTENT_ELEMENTS = ("script", "style")
def __init__(self):
"""Initialize and reset this instance."""
self.reset()
def reset(self):
"""Reset this instance. Loses all unprocessed data."""
self.rawdata = ''
self.stack = []
self.lasttag = '???'
self.interesting = interesting_normal
markupbase.ParserBase.reset(self)
def feed(self, data):
"""Feed data to the parser.
Call this as often as you want, with as little or as much text
as you want (may include '\n').
"""
self.rawdata = self.rawdata + data
self.goahead(0)
def close(self):
"""Handle any buffered data."""
self.goahead(1)
def error(self, message):
raise HTMLParseError(message, self.getpos())
__starttag_text = None
def get_starttag_text(self):
"""Return full source of start tag: '<...>'."""
return self.__starttag_text
cdata_endtag = None
def set_cdata_mode(self, endtag=None):
self.cdata_endtag = endtag
self.interesting = interesting_cdata
def clear_cdata_mode(self):
self.cdata_endtag = None
self.interesting = interesting_normal
# Internal -- handle data as far as reasonable. May leave state
# and data to be processed by a subsequent call. If 'end' is
# true, force handling all data as if followed by EOF marker.
def goahead(self, end):
rawdata = self.rawdata
i = 0
n = len(rawdata)
while i < n:
match = self.interesting.search(rawdata, i) # < or &
if match:
j = match.start()
else:
j = n
if i < j: self.handle_data(rawdata[i:j])
i = self.updatepos(i, j)
if i == n: break
if rawdata[i] == '<':
if starttagopen.match(rawdata, i): # < + letter
k = self.parse_starttag(i)
elif endtagopen.match(rawdata, i): #
if not match:
return -1
j = match.start()
self.handle_pi(rawdata[i+2: j])
j = match.end()
return j
# Internal -- handle starttag, return end or -1 if not terminated
def parse_starttag(self, i):
self.__starttag_text = None
endpos = self.check_for_whole_start_tag(i)
if endpos < 0:
return endpos
rawdata = self.rawdata
self.__starttag_text = rawdata[i:endpos]
# Now parse the data between i+1 and j into a tag and attrs
attrs = []
match = tagfind.match(rawdata, i+1)
assert match, 'unexpected call to parse_starttag()'
k = match.end()
self.lasttag = tag = rawdata[i+1:k].lower()
while k < endpos:
m = attrfind.match(rawdata, k)
if not m:
break
attrname, rest, attrvalue = m.group(1, 2, 3)
if not rest:
attrvalue = None
elif attrvalue[:1] == '\'' == attrvalue[-1:] or \
attrvalue[:1] == '"' == attrvalue[-1:]:
attrvalue = attrvalue[1:-1]
attrvalue = self.unescape(attrvalue)
attrs.append((attrname.lower(), attrvalue))
k = m.end()
end = rawdata[k:endpos].strip()
if end not in (">", "/>"):
lineno, offset = self.getpos()
if "\n" in self.__starttag_text:
lineno = lineno + self.__starttag_text.count("\n")
offset = len(self.__starttag_text) \
- self.__starttag_text.rfind("\n")
else:
offset = offset + len(self.__starttag_text)
self.error("junk characters in start tag: %s"
% `rawdata[k:endpos][:20]`)
if end[-2:] == '/>':
# XHTML-style empty tag:
self.handle_startendtag(tag, attrs)
else:
self.handle_starttag(tag, attrs)
if tag in self.CDATA_CONTENT_ELEMENTS:
self.set_cdata_mode(tag)
return endpos
# Internal -- check to see if we have a complete starttag; return end
# or -1 if incomplete.
def check_for_whole_start_tag(self, i):
rawdata = self.rawdata
m = locatestarttagend.match(rawdata, i)
if m:
j = m.end()
next = rawdata[j:j+1]
if next == ">":
return j + 1
if next == "/":
s = rawdata[j:j+2]
if s == "/>":
return j + 2
if s == "/":
# buffer boundary
return -1
# else bogus input
self.updatepos(i, j + 1)
self.error("malformed empty start tag")
if next == "":
# end of input
return -1
if next in ("abcdefghijklmnopqrstuvwxyz=/"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"):
# end of input in or before attribute value, or we have the
# '/' from a '/>' ending
return -1
self.updatepos(i, j)
self.error("malformed start tag")
raise AssertionError("we should not get here!")
# Internal -- parse endtag, return end or -1 if incomplete
def parse_endtag(self, i):
rawdata = self.rawdata
assert rawdata[i:i+2] == "
if not match:
return -1
j = match.end()
match = endtagfind.match(rawdata, i) #
if not match:
self.error("bad end tag: %s" % `rawdata[i:j]`)
tag = match.group(1).lower()
if ( self.cdata_endtag is not None
and tag != self.cdata_endtag):
# Should be a mismatched end tag, but we'll treat it
# as text anyway, since most HTML authors aren't
# interested in the finer points of syntax.
self.handle_data(match.group(0))
else:
self.handle_endtag(tag)
self.clear_cdata_mode()
return j
# Overridable -- finish processing of start+end tag:
def handle_startendtag(self, tag, attrs):
self.handle_starttag(tag, attrs)
self.handle_endtag(tag)
# Overridable -- handle start tag
def handle_starttag(self, tag, attrs):
pass
# Overridable -- handle end tag
def handle_endtag(self, tag):
pass
# Overridable -- handle character reference
def handle_charref(self, name):
pass
# Overridable -- handle entity reference
def handle_entityref(self, name):
pass
# Overridable -- handle data
def handle_data(self, data):
pass
# Overridable -- handle comment
def handle_comment(self, data):
pass
# Overridable -- handle declaration
def handle_decl(self, decl):
pass
# Overridable -- handle processing instruction
def handle_pi(self, data):
pass
def unknown_decl(self, data):
self.error("unknown declaration: " + `data`)
# Internal -- helper to remove special character quoting
def unescape(self, s):
if '&' not in s:
return s
s = s.replace("<", "<")
s = s.replace(">", ">")
s = s.replace("'", "'")
s = s.replace(""", '"')
s = s.replace("&", "&") # Must be last
return s
code-db8659c4e8eb/roundup/cgi/TAL/HTMLTALParser.py 0000644 0000000 0000000 00000025670 13303235466 017561 0 ustar 0000000 0000000 ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""
Parse HTML and compile to TALInterpreter intermediate code.
"""
import sys
from TALGenerator import TALGenerator
from HTMLParser import HTMLParser, HTMLParseError
from TALDefs import \
ZOPE_METAL_NS, ZOPE_TAL_NS, ZOPE_I18N_NS, METALError, TALError, I18NError
BOOLEAN_HTML_ATTRS = [
# List of Boolean attributes in HTML that may be given in
# minimized form (e.g. ![]()
rather than ![]()
)
# From http://www.w3.org/TR/xhtml1/#guidelines (C.10)
"compact", "nowrap", "ismap", "declare", "noshade", "checked",
"disabled", "readonly", "multiple", "selected", "noresize",
"defer"
]
EMPTY_HTML_TAGS = [
# List of HTML tags with an empty content model; these are
# rendered in minimized form, e.g. ![]()
.
# From http://www.w3.org/TR/xhtml1/#dtds
"base", "meta", "link", "hr", "br", "param", "img", "area",
"input", "col", "basefont", "isindex", "frame",
]
PARA_LEVEL_HTML_TAGS = [
# List of HTML elements that close open paragraph-level elements
# and are themselves paragraph-level.
"h1", "h2", "h3", "h4", "h5", "h6", "p",
]
BLOCK_CLOSING_TAG_MAP = {
"tr": ("tr", "td", "th"),
"td": ("td", "th"),
"th": ("td", "th"),
"li": ("li",),
"dd": ("dd", "dt"),
"dt": ("dd", "dt"),
}
BLOCK_LEVEL_HTML_TAGS = [
# List of HTML tags that denote larger sections than paragraphs.
"blockquote", "table", "tr", "th", "td", "thead", "tfoot", "tbody",
"noframe", "ul", "ol", "li", "dl", "dt", "dd", "div",
]
TIGHTEN_IMPLICIT_CLOSE_TAGS = (PARA_LEVEL_HTML_TAGS
+ BLOCK_CLOSING_TAG_MAP.keys())
class NestingError(HTMLParseError):
"""Exception raised when elements aren't properly nested."""
def __init__(self, tagstack, endtag, position=(None, None)):
self.endtag = endtag
if tagstack:
if len(tagstack) == 1:
msg = ('Open tag <%s> does not match close tag '
% (tagstack[0], endtag))
else:
msg = ('Open tags <%s> do not match close tag '
% ('>, <'.join(tagstack), endtag))
else:
msg = 'No tags are open to match ' % endtag
HTMLParseError.__init__(self, msg, position)
class EmptyTagError(NestingError):
"""Exception raised when empty elements have an end tag."""
def __init__(self, tag, position=(None, None)):
self.tag = tag
msg = 'Close tag should be removed' % tag
HTMLParseError.__init__(self, msg, position)
class OpenTagError(NestingError):
"""Exception raised when a tag is not allowed in another tag."""
def __init__(self, tagstack, tag, position=(None, None)):
self.tag = tag
msg = 'Tag <%s> is not allowed in <%s>' % (tag, tagstack[-1])
HTMLParseError.__init__(self, msg, position)
class HTMLTALParser(HTMLParser):
# External API
def __init__(self, gen=None):
HTMLParser.__init__(self)
if gen is None:
gen = TALGenerator(xml=0)
self.gen = gen
self.tagstack = []
self.nsstack = []
self.nsdict = {'tal': ZOPE_TAL_NS,
'metal': ZOPE_METAL_NS,
'i18n': ZOPE_I18N_NS,
}
def parseFile(self, file):
f = open(file)
data = f.read()
f.close()
try:
self.parseString(data)
except TALError as e:
e.setFile(file)
raise
def parseString(self, data):
self.feed(data)
self.close()
while self.tagstack:
self.implied_endtag(self.tagstack[-1], 2)
assert self.nsstack == [], self.nsstack
def getCode(self):
return self.gen.getCode()
def getWarnings(self):
return ()
# Overriding HTMLParser methods
def handle_starttag(self, tag, attrs):
self.close_para_tags(tag)
self.scan_xmlns(attrs)
tag, attrlist, taldict, metaldict, i18ndict \
= self.process_ns(tag, attrs)
if tag in EMPTY_HTML_TAGS and taldict.get("content"):
raise TALError(
"empty HTML tags cannot use tal:content: %s" % `tag`,
self.getpos())
self.tagstack.append(tag)
self.gen.emitStartElement(tag, attrlist, taldict, metaldict, i18ndict,
self.getpos())
if tag in EMPTY_HTML_TAGS:
self.implied_endtag(tag, -1)
def handle_startendtag(self, tag, attrs):
self.close_para_tags(tag)
self.scan_xmlns(attrs)
tag, attrlist, taldict, metaldict, i18ndict \
= self.process_ns(tag, attrs)
if taldict.get("content"):
if tag in EMPTY_HTML_TAGS:
raise TALError(
"empty HTML tags cannot use tal:content: %s" % `tag`,
self.getpos())
self.gen.emitStartElement(tag, attrlist, taldict, metaldict,
i18ndict, self.getpos())
self.gen.emitEndElement(tag, implied=-1)
else:
self.gen.emitStartElement(tag, attrlist, taldict, metaldict,
i18ndict, self.getpos(), isend=1)
self.pop_xmlns()
def handle_endtag(self, tag):
if tag in EMPTY_HTML_TAGS:
# etc. in the source is an error
raise EmptyTagError(tag, self.getpos())
self.close_enclosed_tags(tag)
self.gen.emitEndElement(tag)
self.pop_xmlns()
self.tagstack.pop()
def close_para_tags(self, tag):
if tag in EMPTY_HTML_TAGS:
return
close_to = -1
if BLOCK_CLOSING_TAG_MAP.has_key(tag):
blocks_to_close = BLOCK_CLOSING_TAG_MAP[tag]
for i in range(len(self.tagstack)):
t = self.tagstack[i]
if t in blocks_to_close:
if close_to == -1:
close_to = i
elif t in BLOCK_LEVEL_HTML_TAGS:
close_to = -1
elif tag in PARA_LEVEL_HTML_TAGS + BLOCK_LEVEL_HTML_TAGS:
i = len(self.tagstack) - 1
while i >= 0:
closetag = self.tagstack[i]
if closetag in BLOCK_LEVEL_HTML_TAGS:
break
if closetag in PARA_LEVEL_HTML_TAGS:
if closetag != "p":
raise OpenTagError(self.tagstack, tag, self.getpos())
close_to = i
i = i - 1
if close_to >= 0:
while len(self.tagstack) > close_to:
self.implied_endtag(self.tagstack[-1], 1)
def close_enclosed_tags(self, tag):
if tag not in self.tagstack:
raise NestingError(self.tagstack, tag, self.getpos())
while tag != self.tagstack[-1]:
self.implied_endtag(self.tagstack[-1], 1)
assert self.tagstack[-1] == tag
def implied_endtag(self, tag, implied):
assert tag == self.tagstack[-1]
assert implied in (-1, 1, 2)
isend = (implied < 0)
if tag in TIGHTEN_IMPLICIT_CLOSE_TAGS:
# Pick out trailing whitespace from the program, and
# insert the close tag before the whitespace.
white = self.gen.unEmitWhitespace()
else:
white = None
self.gen.emitEndElement(tag, isend=isend, implied=implied)
if white:
self.gen.emitRawText(white)
self.tagstack.pop()
self.pop_xmlns()
def handle_charref(self, name):
self.gen.emitRawText("&#%s;" % name)
def handle_entityref(self, name):
self.gen.emitRawText("&%s;" % name)
def handle_data(self, data):
self.gen.emitRawText(data)
def handle_comment(self, data):
self.gen.emitRawText("" % data)
def handle_decl(self, data):
self.gen.emitRawText("" % data)
def handle_pi(self, data):
self.gen.emitRawText("" % data)
# Internal thingies
def scan_xmlns(self, attrs):
nsnew = {}
for key, value in attrs:
if key.startswith("xmlns:"):
nsnew[key[6:]] = value
if nsnew:
self.nsstack.append(self.nsdict)
self.nsdict = self.nsdict.copy()
self.nsdict.update(nsnew)
else:
self.nsstack.append(self.nsdict)
def pop_xmlns(self):
self.nsdict = self.nsstack.pop()
def fixname(self, name):
if ':' in name:
prefix, suffix = name.split(':', 1)
if prefix == 'xmlns':
nsuri = self.nsdict.get(suffix)
if nsuri in (ZOPE_TAL_NS, ZOPE_METAL_NS, ZOPE_I18N_NS):
return name, name, prefix
else:
nsuri = self.nsdict.get(prefix)
if nsuri == ZOPE_TAL_NS:
return name, suffix, 'tal'
elif nsuri == ZOPE_METAL_NS:
return name, suffix, 'metal'
elif nsuri == ZOPE_I18N_NS:
return name, suffix, 'i18n'
return name, name, 0
def process_ns(self, name, attrs):
attrlist = []
taldict = {}
metaldict = {}
i18ndict = {}
name, namebase, namens = self.fixname(name)
for item in attrs:
key, value = item
key, keybase, keyns = self.fixname(key)
ns = keyns or namens # default to tag namespace
if ns and ns != 'unknown':
item = (key, value, ns)
if ns == 'tal':
if taldict.has_key(keybase):
raise TALError("duplicate TAL attribute " +
`keybase`, self.getpos())
taldict[keybase] = value
elif ns == 'metal':
if metaldict.has_key(keybase):
raise METALError("duplicate METAL attribute " +
`keybase`, self.getpos())
metaldict[keybase] = value
elif ns == 'i18n':
if i18ndict.has_key(keybase):
raise I18NError("duplicate i18n attribute " +
`keybase`, self.getpos())
i18ndict[keybase] = value
attrlist.append(item)
if namens in ('metal', 'tal'):
taldict['tal tag'] = namens
return name, attrlist, taldict, metaldict, i18ndict
code-db8659c4e8eb/roundup/cgi/TAL/README.txt 0000644 0000000 0000000 00000006736 13303235466 016425 0 ustar 0000000 0000000 TAL - Template Attribute Language
---------------------------------
This is an implementation of TAL, the Zope Template Attribute
Language. For TAL, see the Zope Presentation Templates ZWiki:
http://dev.zope.org/Wikis/DevSite/Projects/ZPT/FrontPage
It is not a Zope product nor is it designed exclusively to run inside
of Zope, but if you have a Zope checkout that includes
Products/ParsedXML, its Expat parser will be used.
Prerequisites
-------------
You need:
- A recent checkout of Zope2; don't forget to run the wo_pcgi.py
script to compile everything. (See above -- this is now optional.)
- A recent checkout of the Zope2 product ParsedXML, accessible
throught /lib/python/Products/ParsedXML; don't forget to run
the setup.py script to compiles Expat. (Again, optional.)
- Python 1.5.2; the driver script refuses to work with other versions
unless you specify the -n option; this is done so that I don't
accidentally use Python 2.x features.
- Create a .path file containing proper module search path; it should
point the /lib/python directory that you want to use.
How To Play
-----------
(Don't forget to edit .path, see above!)
The script driver.py takes an XML file with TAL markup as argument and
writes the expanded version to standard output. The filename argument
defaults to tests/input/test01.xml.
Regression test
---------------
There are unit test suites in the 'tests' subdirectory; these can be
run with tests/run.py. This should print the testcase names plus
progress info, followed by a final line saying "OK". It requires that
../unittest.py exists.
There are a number of test files in the 'tests' subdirectory, named
tests/input/test.xml and tests/input/test.html. The
Python script ./runtest.py calls driver.main() for each test file, and
should print " OK" for each one. These tests are also run as
part of the unit test suites, so tests/run.py is all you need.
What's Here
-----------
DummyEngine.py simple-minded TALES execution engine
TALInterpreter.py class to interpret intermediate code
TALGenerator.py class to generate intermediate code
XMLParser.py base class to parse XML, avoiding DOM
TALParser.py class to parse XML with TAL into intermediate code
HTMLTALParser.py class to parse HTML with TAL into intermediate code
HTMLParser.py HTML-parsing base class
driver.py script to demonstrate TAL expansion
timer.py script to time various processing phases
setpath.py hack to set sys.path and import ZODB
__init__.py empty file that makes this directory a package
runtest.py Python script to run file-comparison tests
ndiff.py helper for runtest.py to produce diffs
tests/ drectory with test files and output
tests/run.py Python script to run all tests
Author and License
------------------
This code is written by Guido van Rossum (project lead), Fred Drake,
and Tim Peters. It is owned by Digital Creations and can be
redistributed under the Zope Public License.
TO DO
-----
(See also http://www.zope.org/Members/jim/ZPTIssueTracker .)
- Need to remove leading whitespace and newline when omitting an
element (either through tal:replace with a value of nothing or
tal:condition with a false condition).
- Empty TAL/METAL attributes are ignored: tal:replace="" is ignored
rather than causing an error.
- HTMLTALParser.py and TALParser.py are silly names. Should be
HTMLTALCompiler.py and XMLTALCompiler.py (or maybe shortened,
without "TAL"?)
- Should we preserve case of tags and attribute names in HTML?
code-db8659c4e8eb/roundup/cgi/TAL/TALDefs.py 0000644 0000000 0000000 00000012501 13303235466 016506 0 ustar 0000000 0000000 ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
# Modifications for Roundup:
# 1. commented out ITALES references
"""
Common definitions used by TAL and METAL compilation an transformation.
"""
from types import ListType, TupleType
#from ITALES import ITALESErrorInfo
TAL_VERSION = "1.4"
XML_NS = "http://www.w3.org/XML/1998/namespace" # URI for XML namespace
XMLNS_NS = "http://www.w3.org/2000/xmlns/" # URI for XML NS declarations
ZOPE_TAL_NS = "http://xml.zope.org/namespaces/tal"
ZOPE_METAL_NS = "http://xml.zope.org/namespaces/metal"
ZOPE_I18N_NS = "http://xml.zope.org/namespaces/i18n"
# This RE must exactly match the expression of the same name in the
# zope.i18n.simpletranslationservice module:
NAME_RE = "[a-zA-Z_][-a-zA-Z0-9_]*"
KNOWN_METAL_ATTRIBUTES = [
"define-macro",
"use-macro",
"define-slot",
"fill-slot",
"slot",
]
KNOWN_TAL_ATTRIBUTES = [
"define",
"condition",
"content",
"replace",
"repeat",
"attributes",
"on-error",
"omit-tag",
"tal tag",
]
KNOWN_I18N_ATTRIBUTES = [
"translate",
"domain",
"target",
"source",
"attributes",
"data",
"name",
]
class TALError(BaseException):
def __init__(self, msg, position=(None, None)):
assert msg != ""
self.msg = msg
self.lineno = position[0]
self.offset = position[1]
self.filename = None
def setFile(self, filename):
self.filename = filename
def __str__(self):
result = self.msg
if self.lineno is not None:
result = result + ", at line %d" % self.lineno
if self.offset is not None:
result = result + ", column %d" % (self.offset + 1)
if self.filename is not None:
result = result + ', in file %s' % self.filename
return result
class METALError(TALError):
pass
class TALESError(TALError):
pass
class I18NError(TALError):
pass
class ErrorInfo:
#__implements__ = ITALESErrorInfo
def __init__(self, err, position=(None, None)):
if isinstance(err, Exception):
self.type = err.__class__
self.value = err
else:
self.type = err
self.value = None
self.lineno = position[0]
self.offset = position[1]
import re
_attr_re = re.compile(r"\s*([^\s]+)\s+([^\s].*)\Z", re.S)
_subst_re = re.compile(r"\s*(?:(text|structure)\s+)?(.*)\Z", re.S)
del re
def parseAttributeReplacements(arg, xml):
dict = {}
for part in splitParts(arg):
m = _attr_re.match(part)
if not m:
raise TALError("Bad syntax in attributes: " + `part`)
name, expr = m.group(1, 2)
if not xml:
name = name.lower()
if dict.has_key(name):
raise TALError("Duplicate attribute name in attributes: " + `part`)
dict[name] = expr
return dict
def parseSubstitution(arg, position=(None, None)):
m = _subst_re.match(arg)
if not m:
raise TALError("Bad syntax in substitution text: " + `arg`, position)
key, expr = m.group(1, 2)
if not key:
key = "text"
return key, expr
def splitParts(arg):
# Break in pieces at undoubled semicolons and
# change double semicolons to singles:
arg = arg.replace(";;", "\0")
parts = arg.split(';')
parts = [p.replace("\0", ";") for p in parts]
if len(parts) > 1 and not parts[-1].strip():
del parts[-1] # It ended in a semicolon
return parts
def isCurrentVersion(program):
version = getProgramVersion(program)
return version == TAL_VERSION
def getProgramMode(program):
version = getProgramVersion(program)
if (version == TAL_VERSION and isinstance(program[1], TupleType) and
len(program[1]) == 2):
opcode, mode = program[1]
if opcode == "mode":
return mode
return None
def getProgramVersion(program):
if (len(program) >= 2 and
isinstance(program[0], TupleType) and len(program[0]) == 2):
opcode, version = program[0]
if opcode == "version":
return version
return None
import re
_ent1_re = re.compile('&(?![A-Z#])', re.I)
_entch_re = re.compile('&([A-Z][A-Z0-9]*)(?![A-Z0-9;])', re.I)
_entn1_re = re.compile('&#(?![0-9X])', re.I)
_entnx_re = re.compile('&(#X[A-F0-9]*)(?![A-F0-9;])', re.I)
_entnd_re = re.compile('&(#[0-9][0-9]*)(?![0-9;])')
del re
def attrEscape(s):
"""Replace special characters '&<>' by character entities,
except when '&' already begins a syntactically valid entity."""
s = _ent1_re.sub('&', s)
s = _entch_re.sub(r'&\1', s)
s = _entn1_re.sub('&#', s)
s = _entnx_re.sub(r'&\1', s)
s = _entnd_re.sub(r'&\1', s)
s = s.replace('<', '<')
s = s.replace('>', '>')
s = s.replace('"', '"')
return s
code-db8659c4e8eb/roundup/cgi/TAL/TALGenerator.py 0000644 0000000 0000000 00000102640 13303235466 017557 0 ustar 0000000 0000000 ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""
Code generator for TALInterpreter intermediate code.
"""
import re
import cgi
import TALDefs
from TALDefs import NAME_RE, TAL_VERSION
from TALDefs import I18NError, METALError, TALError
from TALDefs import parseSubstitution
from TranslationContext import TranslationContext, DEFAULT_DOMAIN
I18N_REPLACE = 1
I18N_CONTENT = 2
I18N_EXPRESSION = 3
_name_rx = re.compile(NAME_RE)
class TALGenerator:
inMacroUse = 0
inMacroDef = 0
source_file = None
def __init__(self, expressionCompiler=None, xml=1, source_file=None):
if not expressionCompiler:
from DummyEngine import DummyEngine
expressionCompiler = DummyEngine()
self.expressionCompiler = expressionCompiler
self.CompilerError = expressionCompiler.getCompilerError()
# This holds the emitted opcodes representing the input
self.program = []
# The program stack for when we need to do some sub-evaluation for an
# intermediate result. E.g. in an i18n:name tag for which the
# contents describe the ${name} value.
self.stack = []
# Another stack of postponed actions. Elements on this stack are a
# dictionary; key/values contain useful information that
# emitEndElement needs to finish its calculations
self.todoStack = []
self.macros = {}
self.slots = {}
self.slotStack = []
self.xml = xml
self.emit("version", TAL_VERSION)
self.emit("mode", xml and "xml" or "html")
if source_file is not None:
self.source_file = source_file
self.emit("setSourceFile", source_file)
self.i18nContext = TranslationContext()
self.i18nLevel = 0
def getCode(self):
assert not self.stack
assert not self.todoStack
return self.optimize(self.program), self.macros
def optimize(self, program):
output = []
collect = []
cursor = 0
if self.xml:
endsep = "/>"
else:
endsep = " />"
for cursor in xrange(len(program)+1):
try:
item = program[cursor]
except IndexError:
item = (None, None)
opcode = item[0]
if opcode == "rawtext":
collect.append(item[1])
continue
if opcode == "endTag":
collect.append("" % item[1])
continue
if opcode == "startTag":
if self.optimizeStartTag(collect, item[1], item[2], ">"):
continue
if opcode == "startEndTag":
if self.optimizeStartTag(collect, item[1], item[2], endsep):
continue
if opcode in ("beginScope", "endScope"):
# Push *Scope instructions in front of any text instructions;
# this allows text instructions separated only by *Scope
# instructions to be joined together.
output.append(self.optimizeArgsList(item))
continue
if opcode == 'noop':
# This is a spacer for end tags in the face of i18n:name
# attributes. We can't let the optimizer collect immediately
# following end tags into the same rawtextOffset.
opcode = None
pass
text = "".join(collect)
if text:
i = text.rfind("\n")
if i >= 0:
i = len(text) - (i + 1)
output.append(("rawtextColumn", (text, i)))
else:
output.append(("rawtextOffset", (text, len(text))))
if opcode != None:
output.append(self.optimizeArgsList(item))
collect = []
return self.optimizeCommonTriple(output)
def optimizeArgsList(self, item):
if len(item) == 2:
return item
else:
return item[0], tuple(item[1:])
# These codes are used to indicate what sort of special actions
# are needed for each special attribute. (Simple attributes don't
# get action codes.)
#
# The special actions (which are modal) are handled by
# TALInterpreter.attrAction() and .attrAction_tal().
#
# Each attribute is represented by a tuple:
#
# (name, value) -- a simple name/value pair, with
# no special processing
#
# (name, value, action, *extra) -- attribute with special
# processing needs, action is a
# code that indicates which
# branch to take, and *extra
# contains additional,
# action-specific information
# needed by the processing
#
def optimizeStartTag(self, collect, name, attrlist, end):
# return true if the tag can be converted to plain text
if not attrlist:
collect.append("<%s%s" % (name, end))
return 1
opt = 1
new = ["<" + name]
for i in range(len(attrlist)):
item = attrlist[i]
if len(item) > 2:
opt = 0
name, value, action = item[:3]
attrlist[i] = (name, value, action) + item[3:]
else:
if item[1] is None:
s = item[0]
else:
s = '%s="%s"' % (item[0], TALDefs.attrEscape(item[1]))
attrlist[i] = item[0], s
new.append(" " + s)
# if no non-optimizable attributes were found, convert to plain text
if opt:
new.append(end)
collect.extend(new)
return opt
def optimizeCommonTriple(self, program):
if len(program) < 3:
return program
output = program[:2]
prev2, prev1 = output
for item in program[2:]:
if ( item[0] == "beginScope"
and prev1[0] == "setPosition"
and prev2[0] == "rawtextColumn"):
position = output.pop()[1]
text, column = output.pop()[1]
prev1 = None, None
closeprev = 0
if output and output[-1][0] == "endScope":
closeprev = 1
output.pop()
item = ("rawtextBeginScope",
(text, column, position, closeprev, item[1]))
output.append(item)
prev2 = prev1
prev1 = item
return output
def todoPush(self, todo):
self.todoStack.append(todo)
def todoPop(self):
return self.todoStack.pop()
def compileExpression(self, expr):
try:
return self.expressionCompiler.compile(expr)
except self.CompilerError as err:
raise TALError('%s in expression %s' % (err.args[0], `expr`),
self.position)
def pushProgram(self):
self.stack.append(self.program)
self.program = []
def popProgram(self):
program = self.program
self.program = self.stack.pop()
return self.optimize(program)
def pushSlots(self):
self.slotStack.append(self.slots)
self.slots = {}
def popSlots(self):
slots = self.slots
self.slots = self.slotStack.pop()
return slots
def emit(self, *instruction):
self.program.append(instruction)
def emitStartTag(self, name, attrlist, isend=0):
if isend:
opcode = "startEndTag"
else:
opcode = "startTag"
self.emit(opcode, name, attrlist)
def emitEndTag(self, name):
if self.xml and self.program and self.program[-1][0] == "startTag":
# Minimize empty element
self.program[-1] = ("startEndTag",) + self.program[-1][1:]
else:
self.emit("endTag", name)
def emitOptTag(self, name, optTag, isend):
program = self.popProgram() #block
start = self.popProgram() #start tag
if (isend or not program) and self.xml:
# Minimize empty element
start[-1] = ("startEndTag",) + start[-1][1:]
isend = 1
cexpr = optTag[0]
if cexpr:
cexpr = self.compileExpression(optTag[0])
self.emit("optTag", name, cexpr, optTag[1], isend, start, program)
def emitRawText(self, text):
self.emit("rawtext", text)
def emitText(self, text):
self.emitRawText(cgi.escape(text))
def emitDefines(self, defines):
for part in TALDefs.splitParts(defines):
m = re.match(
r"(?s)\s*(?:(global|local)\s+)?(%s)\s+(.*)\Z" % NAME_RE, part)
if not m:
raise TALError("invalid define syntax: " + `part`,
self.position)
scope, name, expr = m.group(1, 2, 3)
scope = scope or "local"
cexpr = self.compileExpression(expr)
if scope == "local":
self.emit("setLocal", name, cexpr)
else:
self.emit("setGlobal", name, cexpr)
def emitOnError(self, name, onError, TALtag, isend):
block = self.popProgram()
key, expr = parseSubstitution(onError)
cexpr = self.compileExpression(expr)
if key == "text":
self.emit("insertText", cexpr, [])
else:
assert key == "structure"
self.emit("insertStructure", cexpr, {}, [])
if TALtag:
self.emitOptTag(name, (None, 1), isend)
else:
self.emitEndTag(name)
handler = self.popProgram()
self.emit("onError", block, handler)
def emitCondition(self, expr):
cexpr = self.compileExpression(expr)
program = self.popProgram()
self.emit("condition", cexpr, program)
def emitRepeat(self, arg):
m = re.match("(?s)\s*(%s)\s+(.*)\Z" % NAME_RE, arg)
if not m:
raise TALError("invalid repeat syntax: " + `arg`,
self.position)
name, expr = m.group(1, 2)
cexpr = self.compileExpression(expr)
program = self.popProgram()
self.emit("loop", name, cexpr, program)
def emitSubstitution(self, arg, attrDict={}):
key, expr = parseSubstitution(arg)
cexpr = self.compileExpression(expr)
program = self.popProgram()
if key == "text":
self.emit("insertText", cexpr, program)
else:
assert key == "structure"
self.emit("insertStructure", cexpr, attrDict, program)
def emitI18nVariable(self, stuff):
# Used for i18n:name attributes. arg is extra information describing
# how the contents of the variable should get filled in, and it will
# either be a 1-tuple or a 2-tuple. If arg[0] is None, then the
# i18n:name value is taken implicitly from the contents of the tag,
# e.g. "I live in the USA". In this
# case, arg[1] is the opcode sub-program describing the contents of
# the tag.
#
# When arg[0] is not None, it contains the tal expression used to
# calculate the contents of the variable, e.g.
# "I live in "
varname, action, expression = stuff
m = _name_rx.match(varname)
if m is None or m.group() != varname:
raise TALError("illegal i18n:name: %r" % varname, self.position)
key = cexpr = None
program = self.popProgram()
if action == I18N_REPLACE:
# This is a tag with an i18n:name and a tal:replace (implicit or
# explicit). Get rid of the first and last elements of the
# program, which are the start and end tag opcodes of the tag.
program = program[1:-1]
elif action == I18N_CONTENT:
# This is a tag with an i18n:name and a tal:content
# (explicit-only). Keep the first and last elements of the
# program, so we keep the start and end tag output.
pass
else:
assert action == I18N_EXPRESSION
key, expr = parseSubstitution(expression)
cexpr = self.compileExpression(expr)
# XXX Would key be anything but 'text' or None?
assert key in ('text', None)
self.emit('i18nVariable', varname, program, cexpr)
def emitTranslation(self, msgid, i18ndata):
program = self.popProgram()
if i18ndata is None:
self.emit('insertTranslation', msgid, program)
else:
key, expr = parseSubstitution(i18ndata)
cexpr = self.compileExpression(expr)
assert key == 'text'
self.emit('insertTranslation', msgid, program, cexpr)
def emitDefineMacro(self, macroName):
program = self.popProgram()
macroName = macroName.strip()
if self.macros.has_key(macroName):
raise METALError("duplicate macro definition: %s" % `macroName`,
self.position)
if not re.match('%s$' % NAME_RE, macroName):
raise METALError("invalid macro name: %s" % `macroName`,
self.position)
self.macros[macroName] = program
self.inMacroDef = self.inMacroDef - 1
self.emit("defineMacro", macroName, program)
def emitUseMacro(self, expr):
cexpr = self.compileExpression(expr)
program = self.popProgram()
self.inMacroUse = 0
self.emit("useMacro", expr, cexpr, self.popSlots(), program)
def emitDefineSlot(self, slotName):
program = self.popProgram()
slotName = slotName.strip()
if not re.match('%s$' % NAME_RE, slotName):
raise METALError("invalid slot name: %s" % `slotName`,
self.position)
self.emit("defineSlot", slotName, program)
def emitFillSlot(self, slotName):
program = self.popProgram()
slotName = slotName.strip()
if self.slots.has_key(slotName):
raise METALError("duplicate fill-slot name: %s" % `slotName`,
self.position)
if not re.match('%s$' % NAME_RE, slotName):
raise METALError("invalid slot name: %s" % `slotName`,
self.position)
self.slots[slotName] = program
self.inMacroUse = 1
self.emit("fillSlot", slotName, program)
def unEmitWhitespace(self):
collect = []
i = len(self.program) - 1
while i >= 0:
item = self.program[i]
if item[0] != "rawtext":
break
text = item[1]
if not re.match(r"\A\s*\Z", text):
break
collect.append(text)
i = i-1
del self.program[i+1:]
if i >= 0 and self.program[i][0] == "rawtext":
text = self.program[i][1]
m = re.search(r"\s+\Z", text)
if m:
self.program[i] = ("rawtext", text[:m.start()])
collect.append(m.group())
collect.reverse()
return "".join(collect)
def unEmitNewlineWhitespace(self):
collect = []
i = len(self.program)
while i > 0:
i = i-1
item = self.program[i]
if item[0] != "rawtext":
break
text = item[1]
if re.match(r"\A[ \t]*\Z", text):
collect.append(text)
continue
m = re.match(r"(?s)^(.*)(\n[ \t]*)\Z", text)
if not m:
break
text, rest = m.group(1, 2)
collect.reverse()
rest = rest + "".join(collect)
del self.program[i:]
if text:
self.emit("rawtext", text)
return rest
return None
def replaceAttrs(self, attrlist, repldict):
# Each entry in attrlist starts like (name, value).
# Result is (name, value, action, expr, xlat) if there is a
# tal:attributes entry for that attribute. Additional attrs
# defined only by tal:attributes are added here.
#
# (name, value, action, expr, xlat)
if not repldict:
return attrlist
newlist = []
for item in attrlist:
key = item[0]
if repldict.has_key(key):
expr, xlat, msgid = repldict[key]
item = item[:2] + ("replace", expr, xlat, msgid)
del repldict[key]
newlist.append(item)
# Add dynamic-only attributes
for key, (expr, xlat, msgid) in repldict.items():
newlist.append((key, None, "insert", expr, xlat, msgid))
return newlist
def emitStartElement(self, name, attrlist, taldict, metaldict, i18ndict,
position=(None, None), isend=0):
if not taldict and not metaldict and not i18ndict:
# Handle the simple, common case
self.emitStartTag(name, attrlist, isend)
self.todoPush({})
if isend:
self.emitEndElement(name, isend)
return
self.position = position
for key, value in taldict.items():
if key not in TALDefs.KNOWN_TAL_ATTRIBUTES:
raise TALError("bad TAL attribute: " + `key`, position)
if not (value or key == 'omit-tag'):
raise TALError("missing value for TAL attribute: " +
`key`, position)
for key, value in metaldict.items():
if key not in TALDefs.KNOWN_METAL_ATTRIBUTES:
raise METALError("bad METAL attribute: " + `key`,
position)
if not value:
raise TALError("missing value for METAL attribute: " +
`key`, position)
for key, value in i18ndict.items():
if key not in TALDefs.KNOWN_I18N_ATTRIBUTES:
raise I18NError("bad i18n attribute: " + `key`, position)
if not value and key in ("attributes", "data", "id"):
raise I18NError("missing value for i18n attribute: " +
`key`, position)
todo = {}
defineMacro = metaldict.get("define-macro")
useMacro = metaldict.get("use-macro")
defineSlot = metaldict.get("define-slot")
fillSlot = metaldict.get("fill-slot")
define = taldict.get("define")
condition = taldict.get("condition")
repeat = taldict.get("repeat")
content = taldict.get("content")
replace = taldict.get("replace")
attrsubst = taldict.get("attributes")
onError = taldict.get("on-error")
omitTag = taldict.get("omit-tag")
TALtag = taldict.get("tal tag")
i18nattrs = i18ndict.get("attributes")
# Preserve empty string if implicit msgids are used. We'll generate
# code with the msgid='' and calculate the right implicit msgid during
# interpretation phase.
msgid = i18ndict.get("translate")
varname = i18ndict.get('name')
i18ndata = i18ndict.get('data')
if varname and not self.i18nLevel:
raise I18NError(
"i18n:name can only occur inside a translation unit",
position)
if i18ndata and not msgid:
raise I18NError("i18n:data must be accompanied by i18n:translate",
position)
if len(metaldict) > 1 and (defineMacro or useMacro):
raise METALError("define-macro and use-macro cannot be used "
"together or with define-slot or fill-slot",
position)
if replace:
if content:
raise TALError(
"tal:content and tal:replace are mutually exclusive",
position)
if msgid is not None:
raise I18NError(
"i18n:translate and tal:replace are mutually exclusive",
position)
repeatWhitespace = None
if repeat:
# Hack to include preceding whitespace in the loop program
repeatWhitespace = self.unEmitNewlineWhitespace()
if position != (None, None):
# XXX at some point we should insist on a non-trivial position
self.emit("setPosition", position)
if self.inMacroUse:
if fillSlot:
self.pushProgram()
if self.source_file is not None:
self.emit("setSourceFile", self.source_file)
todo["fillSlot"] = fillSlot
self.inMacroUse = 0
else:
if fillSlot:
raise METALError("fill-slot must be within a use-macro",
position)
if not self.inMacroUse:
if defineMacro:
self.pushProgram()
self.emit("version", TAL_VERSION)
self.emit("mode", self.xml and "xml" or "html")
if self.source_file is not None:
self.emit("setSourceFile", self.source_file)
todo["defineMacro"] = defineMacro
self.inMacroDef = self.inMacroDef + 1
if useMacro:
self.pushSlots()
self.pushProgram()
todo["useMacro"] = useMacro
self.inMacroUse = 1
if defineSlot:
if not self.inMacroDef:
raise METALError(
"define-slot must be within a define-macro",
position)
self.pushProgram()
todo["defineSlot"] = defineSlot
if defineSlot or i18ndict:
domain = i18ndict.get("domain") or self.i18nContext.domain
source = i18ndict.get("source") or self.i18nContext.source
target = i18ndict.get("target") or self.i18nContext.target
if ( domain != DEFAULT_DOMAIN
or source is not None
or target is not None):
self.i18nContext = TranslationContext(self.i18nContext,
domain=domain,
source=source,
target=target)
self.emit("beginI18nContext",
{"domain": domain, "source": source,
"target": target})
todo["i18ncontext"] = 1
if taldict or i18ndict:
dict = {}
for item in attrlist:
key, value = item[:2]
dict[key] = value
self.emit("beginScope", dict)
todo["scope"] = 1
if onError:
self.pushProgram() # handler
if TALtag:
self.pushProgram() # start
self.emitStartTag(name, list(attrlist)) # Must copy attrlist!
if TALtag:
self.pushProgram() # start
self.pushProgram() # block
todo["onError"] = onError
if define:
self.emitDefines(define)
todo["define"] = define
if condition:
self.pushProgram()
todo["condition"] = condition
if repeat:
todo["repeat"] = repeat
self.pushProgram()
if repeatWhitespace:
self.emitText(repeatWhitespace)
if content:
if varname:
todo['i18nvar'] = (varname, I18N_CONTENT, None)
todo["content"] = content
self.pushProgram()
else:
todo["content"] = content
elif replace:
# tal:replace w/ i18n:name has slightly different semantics. What
# we're actually replacing then is the contents of the ${name}
# placeholder.
if varname:
todo['i18nvar'] = (varname, I18N_EXPRESSION, replace)
else:
todo["replace"] = replace
self.pushProgram()
# i18n:name w/o tal:replace uses the content as the interpolation
# dictionary values
elif varname:
todo['i18nvar'] = (varname, I18N_REPLACE, None)
self.pushProgram()
if msgid is not None:
self.i18nLevel += 1
todo['msgid'] = msgid
if i18ndata:
todo['i18ndata'] = i18ndata
optTag = omitTag is not None or TALtag
if optTag:
todo["optional tag"] = omitTag, TALtag
self.pushProgram()
if attrsubst or i18nattrs:
if attrsubst:
repldict = TALDefs.parseAttributeReplacements(attrsubst,
self.xml)
else:
repldict = {}
if i18nattrs:
i18nattrs = _parseI18nAttributes(i18nattrs, attrlist, repldict,
self.position, self.xml,
self.source_file)
else:
i18nattrs = {}
# Convert repldict's name-->expr mapping to a
# name-->(compiled_expr, translate) mapping
for key, value in repldict.items():
if i18nattrs.get(key, None):
raise I18NError(
("attribute [%s] cannot both be part of tal:attributes" +
" and have a msgid in i18n:attributes") % key,
position)
ce = self.compileExpression(value)
repldict[key] = ce, key in i18nattrs, i18nattrs.get(key)
for key in i18nattrs:
if not repldict.has_key(key):
repldict[key] = None, 1, i18nattrs.get(key)
else:
repldict = {}
if replace:
todo["repldict"] = repldict
repldict = {}
self.emitStartTag(name, self.replaceAttrs(attrlist, repldict), isend)
if optTag:
self.pushProgram()
if content and not varname:
self.pushProgram()
if msgid is not None:
self.pushProgram()
if content and varname:
self.pushProgram()
if todo and position != (None, None):
todo["position"] = position
self.todoPush(todo)
if isend:
self.emitEndElement(name, isend)
def emitEndElement(self, name, isend=0, implied=0):
todo = self.todoPop()
if not todo:
# Shortcut
if not isend:
self.emitEndTag(name)
return
self.position = position = todo.get("position", (None, None))
defineMacro = todo.get("defineMacro")
useMacro = todo.get("useMacro")
defineSlot = todo.get("defineSlot")
fillSlot = todo.get("fillSlot")
repeat = todo.get("repeat")
content = todo.get("content")
replace = todo.get("replace")
condition = todo.get("condition")
onError = todo.get("onError")
define = todo.get("define")
repldict = todo.get("repldict", {})
scope = todo.get("scope")
optTag = todo.get("optional tag")
msgid = todo.get('msgid')
i18ncontext = todo.get("i18ncontext")
varname = todo.get('i18nvar')
i18ndata = todo.get('i18ndata')
if implied > 0:
if defineMacro or useMacro or defineSlot or fillSlot:
exc = METALError
what = "METAL"
else:
exc = TALError
what = "TAL"
raise exc("%s attributes on <%s> require explicit " %
(what, name, name), position)
# If there's no tal:content or tal:replace in the tag with the
# i18n:name, tal:replace is the default.
if content:
self.emitSubstitution(content, {})
# If we're looking at an implicit msgid, emit the insertTranslation
# opcode now, so that the end tag doesn't become part of the implicit
# msgid. If we're looking at an explicit msgid, it's better to emit
# the opcode after the i18nVariable opcode so we can better handle
# tags with both of them in them (and in the latter case, the contents
# would be thrown away for msgid purposes).
#
# Still, we should emit insertTranslation opcode before i18nVariable
# in case tal:content, i18n:translate and i18n:name in the same tag
if msgid is not None:
if (not varname) or (
varname and (varname[1] == I18N_CONTENT)):
self.emitTranslation(msgid, i18ndata)
self.i18nLevel -= 1
if optTag:
self.emitOptTag(name, optTag, isend)
elif not isend:
# If we're processing the end tag for a tag that contained
# i18n:name, we need to make sure that optimize() won't collect
# immediately following end tags into the same rawtextOffset, so
# put a spacer here that the optimizer will recognize.
if varname:
self.emit('noop')
self.emitEndTag(name)
# If i18n:name appeared in the same tag as tal:replace then we're
# going to do the substitution a little bit differently. The results
# of the expression go into the i18n substitution dictionary.
if replace:
self.emitSubstitution(replace, repldict)
elif varname:
# o varname[0] is the variable name
# o varname[1] is either
# - I18N_REPLACE for implicit tal:replace
# - I18N_CONTENT for tal:content
# - I18N_EXPRESSION for explicit tal:replace
# o varname[2] will be None for the first two actions and the
# replacement tal expression for the third action.
assert (varname[1]
in [I18N_REPLACE, I18N_CONTENT, I18N_EXPRESSION])
self.emitI18nVariable(varname)
# Do not test for "msgid is not None", i.e. we only want to test for
# explicit msgids here. See comment above.
if msgid is not None:
# in case tal:content, i18n:translate and i18n:name in the
# same tag insertTranslation opcode has already been
# emitted
if varname and (varname[1] <> I18N_CONTENT):
self.emitTranslation(msgid, i18ndata)
if repeat:
self.emitRepeat(repeat)
if condition:
self.emitCondition(condition)
if onError:
self.emitOnError(name, onError, optTag and optTag[1], isend)
if scope:
self.emit("endScope")
if i18ncontext:
self.emit("endI18nContext")
assert self.i18nContext.parent is not None
self.i18nContext = self.i18nContext.parent
if defineSlot:
self.emitDefineSlot(defineSlot)
if fillSlot:
self.emitFillSlot(fillSlot)
if useMacro:
self.emitUseMacro(useMacro)
if defineMacro:
self.emitDefineMacro(defineMacro)
def _parseI18nAttributes(i18nattrs, attrlist, repldict, position,
xml, source_file):
def addAttribute(dic, attr, msgid, position, xml):
if not xml:
attr = attr.lower()
if attr in dic:
raise TALError(
"attribute may only be specified once in i18n:attributes: "
+ attr,
position)
dic[attr] = msgid
d = {}
if ';' in i18nattrs:
i18nattrlist = i18nattrs.split(';')
i18nattrlist = [attr.strip().split()
for attr in i18nattrlist if attr.strip()]
for parts in i18nattrlist:
if len(parts) > 2:
raise TALError("illegal i18n:attributes specification: %r"
% parts, position)
if len(parts) == 2:
attr, msgid = parts
else:
# len(parts) == 1
attr = parts[0]
msgid = None
addAttribute(d, attr, msgid, position, xml)
else:
i18nattrlist = i18nattrs.split()
if len(i18nattrlist) == 2:
staticattrs = [attr[0] for attr in attrlist if len(attr) == 2]
if (not i18nattrlist[1] in staticattrs) and (
not i18nattrlist[1] in repldict):
attr, msgid = i18nattrlist
addAttribute(d, attr, msgid, position, xml)
else:
msgid = None
for attr in i18nattrlist:
addAttribute(d, attr, msgid, position, xml)
else:
msgid = None
for attr in i18nattrlist:
addAttribute(d, attr, msgid, position, xml)
return d
def test():
t = TALGenerator()
t.pushProgram()
t.emit("bar")
p = t.popProgram()
t.emit("foo", p)
if __name__ == "__main__":
test()
code-db8659c4e8eb/roundup/cgi/TAL/TALInterpreter.py 0000644 0000000 0000000 00000066101 13303235466 020135 0 ustar 0000000 0000000 ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
# Modifications for Roundup:
# 1. implemented ustr as str
"""
Interpreter for a pre-compiled TAL program.
"""
import sys
import getopt
import re
from types import ListType
from cgi import escape
# Do not use cStringIO here! It's not unicode aware. :(
from StringIO import StringIO
#from DocumentTemplate.DT_Util import ustr
ustr = str
from TALDefs import TAL_VERSION, TALError, METALError, attrEscape
from TALDefs import isCurrentVersion, getProgramVersion, getProgramMode
from TALGenerator import TALGenerator
from TranslationContext import TranslationContext
BOOLEAN_HTML_ATTRS = [
# List of Boolean attributes in HTML that should be rendered in
# minimized form (e.g. ![]()
rather than ![]()
)
# From http://www.w3.org/TR/xhtml1/#guidelines (C.10)
# XXX The problem with this is that this is not valid XML and
# can't be parsed back!
"compact", "nowrap", "ismap", "declare", "noshade", "checked",
"disabled", "readonly", "multiple", "selected", "noresize",
"defer"
]
def normalize(text):
# Now we need to normalize the whitespace in implicit message ids and
# implicit $name substitution values by stripping leading and trailing
# whitespace, and folding all internal whitespace to a single space.
return ' '.join(text.split())
NAME_RE = r"[a-zA-Z][a-zA-Z0-9_]*"
_interp_regex = re.compile(r'(?"
self.endlen = len(self.endsep)
self.macroStack = []
self.position = None, None # (lineno, offset)
self.col = 0
self.level = 0
self.scopeLevel = 0
self.sourceFile = None
self.i18nStack = []
self.i18nInterpolate = i18nInterpolate
self.i18nContext = TranslationContext()
def StringIO(self):
# Third-party products wishing to provide a full Unicode-aware
# StringIO can do so by monkey-patching this method.
return FasterStringIO()
def saveState(self):
return (self.position, self.col, self.stream,
self.scopeLevel, self.level, self.i18nContext)
def restoreState(self, state):
(self.position, self.col, self.stream, scopeLevel, level, i18n) = state
self._stream_write = self.stream.write
assert self.level == level
while self.scopeLevel > scopeLevel:
self.engine.endScope()
self.scopeLevel = self.scopeLevel - 1
self.engine.setPosition(self.position)
self.i18nContext = i18n
def restoreOutputState(self, state):
(dummy, self.col, self.stream, scopeLevel, level, i18n) = state
self._stream_write = self.stream.write
assert self.level == level
assert self.scopeLevel == scopeLevel
def pushMacro(self, macroName, slots, entering=1):
if len(self.macroStack) >= self.stackLimit:
raise METALError("macro nesting limit (%d) exceeded "
"by %s" % (self.stackLimit, `macroName`))
self.macroStack.append([macroName, slots, entering, self.i18nContext])
def popMacro(self):
return self.macroStack.pop()
def __call__(self):
assert self.level == 0
assert self.scopeLevel == 0
assert self.i18nContext.parent is None
self.interpret(self.program)
assert self.level == 0
assert self.scopeLevel == 0
assert self.i18nContext.parent is None
if self.col > 0:
self._stream_write("\n")
self.col = 0
def stream_write(self, s,
len=len):
self._stream_write(s)
i = s.rfind('\n')
if i < 0:
self.col = self.col + len(s)
else:
self.col = len(s) - (i + 1)
bytecode_handlers = {}
def interpretWithStream(self, program, stream):
oldstream = self.stream
self.stream = stream
self._stream_write = stream.write
try:
self.interpret(program)
finally:
self.stream = oldstream
self._stream_write = oldstream.write
def interpret(self, program):
oldlevel = self.level
self.level = oldlevel + 1
handlers = self.dispatch
try:
if self.debug:
for (opcode, args) in program:
s = "%sdo_%s(%s)\n" % (" "*self.level, opcode,
repr(args))
if len(s) > 80:
s = s[:76] + "...\n"
sys.stderr.write(s)
handlers[opcode](self, args)
else:
for (opcode, args) in program:
handlers[opcode](self, args)
finally:
self.level = oldlevel
def do_version(self, version):
assert version == TAL_VERSION
bytecode_handlers["version"] = do_version
def do_mode(self, mode):
assert mode in ("html", "xml")
self.html = (mode == "html")
if self.html:
self.endsep = " />"
else:
self.endsep = "/>"
self.endlen = len(self.endsep)
bytecode_handlers["mode"] = do_mode
def do_setSourceFile(self, source_file):
self.sourceFile = source_file
self.engine.setSourceFile(source_file)
bytecode_handlers["setSourceFile"] = do_setSourceFile
def do_setPosition(self, position):
self.position = position
self.engine.setPosition(position)
bytecode_handlers["setPosition"] = do_setPosition
def do_startEndTag(self, stuff):
self.do_startTag(stuff, self.endsep, self.endlen)
bytecode_handlers["startEndTag"] = do_startEndTag
def do_startTag(self, (name, attrList),
end=">", endlen=1, _len=len):
# The bytecode generator does not cause calls to this method
# for start tags with no attributes; those are optimized down
# to rawtext events. Hence, there is no special "fast path"
# for that case.
L = ["<", name]
append = L.append
col = self.col + _len(name) + 1
wrap = self.wrap
align = col + 1
if align >= wrap/2:
align = 4 # Avoid a narrow column far to the right
attrAction = self.dispatch[""]
try:
for item in attrList:
if _len(item) == 2:
name, s = item
else:
# item[2] is the 'action' field:
if item[2] in ('metal', 'tal', 'xmlns', 'i18n'):
if not self.showtal:
continue
ok, name, s = self.attrAction(item)
else:
ok, name, s = attrAction(self, item)
if not ok:
continue
slen = _len(s)
if (wrap and
col >= align and
col + 1 + slen > wrap):
append("\n")
append(" "*align)
col = align + slen
else:
append(" ")
col = col + 1 + slen
append(s)
append(end)
self._stream_write("".join(L))
col = col + endlen
finally:
self.col = col
bytecode_handlers["startTag"] = do_startTag
def attrAction(self, item):
name, value, action = item[:3]
if action == 'insert':
return 0, name, value
macs = self.macroStack
if action == 'metal' and self.metal and macs:
if len(macs) > 1 or not macs[-1][2]:
# Drop all METAL attributes at a use-depth above one.
return 0, name, value
# Clear 'entering' flag
macs[-1][2] = 0
# Convert or drop depth-one METAL attributes.
i = name.rfind(":") + 1
prefix, suffix = name[:i], name[i:]
if suffix == "define-macro":
# Convert define-macro as we enter depth one.
name = prefix + "use-macro"
value = macs[-1][0] # Macro name
elif suffix == "define-slot":
name = prefix + "fill-slot"
elif suffix == "fill-slot":
pass
else:
return 0, name, value
if value is None:
value = name
else:
value = '%s="%s"' % (name, attrEscape(value))
return 1, name, value
def attrAction_tal(self, item):
name, value, action = item[:3]
ok = 1
expr, xlat, msgid = item[3:]
if self.html and name.lower() in BOOLEAN_HTML_ATTRS:
evalue = self.engine.evaluateBoolean(item[3])
if evalue is self.Default:
if action == 'insert': # Cancelled insert
ok = 0
elif evalue:
value = None
else:
ok = 0
elif expr is not None:
evalue = self.engine.evaluateText(item[3])
if evalue is self.Default:
if action == 'insert': # Cancelled insert
ok = 0
else:
if evalue is None:
ok = 0
value = evalue
else:
evalue = None
if ok:
if xlat:
translated = self.translate(msgid or value, value, {})
if translated is not None:
value = translated
if value is None:
value = name
elif evalue is self.Default:
value = attrEscape(value)
else:
value = escape(value, quote=1)
value = '%s="%s"' % (name, value)
return ok, name, value
bytecode_handlers[""] = attrAction
def no_tag(self, start, program):
state = self.saveState()
self.stream = stream = self.StringIO()
self._stream_write = stream.write
self.interpret(start)
self.restoreOutputState(state)
self.interpret(program)
def do_optTag(self, (name, cexpr, tag_ns, isend, start, program),
omit=0):
if tag_ns and not self.showtal:
return self.no_tag(start, program)
self.interpret(start)
if not isend:
self.interpret(program)
s = '' % name
self._stream_write(s)
self.col = self.col + len(s)
def do_optTag_tal(self, stuff):
cexpr = stuff[1]
if cexpr is not None and (cexpr == '' or
self.engine.evaluateBoolean(cexpr)):
self.no_tag(stuff[-2], stuff[-1])
else:
self.do_optTag(stuff)
bytecode_handlers["optTag"] = do_optTag
def do_rawtextBeginScope(self, (s, col, position, closeprev, dict)):
self._stream_write(s)
self.col = col
self.position = position
self.engine.setPosition(position)
if closeprev:
engine = self.engine
engine.endScope()
engine.beginScope()
else:
self.engine.beginScope()
self.scopeLevel = self.scopeLevel + 1
def do_rawtextBeginScope_tal(self, (s, col, position, closeprev, dict)):
self._stream_write(s)
self.col = col
engine = self.engine
self.position = position
engine.setPosition(position)
if closeprev:
engine.endScope()
engine.beginScope()
else:
engine.beginScope()
self.scopeLevel = self.scopeLevel + 1
engine.setLocal("attrs", dict)
bytecode_handlers["rawtextBeginScope"] = do_rawtextBeginScope
def do_beginScope(self, dict):
self.engine.beginScope()
self.scopeLevel = self.scopeLevel + 1
def do_beginScope_tal(self, dict):
engine = self.engine
engine.beginScope()
engine.setLocal("attrs", dict)
self.scopeLevel = self.scopeLevel + 1
bytecode_handlers["beginScope"] = do_beginScope
def do_endScope(self, notused=None):
self.engine.endScope()
self.scopeLevel = self.scopeLevel - 1
bytecode_handlers["endScope"] = do_endScope
def do_setLocal(self, notused):
pass
def do_setLocal_tal(self, (name, expr)):
self.engine.setLocal(name, self.engine.evaluateValue(expr))
bytecode_handlers["setLocal"] = do_setLocal
def do_setGlobal_tal(self, (name, expr)):
self.engine.setGlobal(name, self.engine.evaluateValue(expr))
bytecode_handlers["setGlobal"] = do_setLocal
def do_beginI18nContext(self, settings):
get = settings.get
self.i18nContext = TranslationContext(self.i18nContext,
domain=get("domain"),
source=get("source"),
target=get("target"))
bytecode_handlers["beginI18nContext"] = do_beginI18nContext
def do_endI18nContext(self, notused=None):
self.i18nContext = self.i18nContext.parent
assert self.i18nContext is not None
bytecode_handlers["endI18nContext"] = do_endI18nContext
def do_insertText(self, stuff):
self.interpret(stuff[1])
def do_insertText_tal(self, stuff):
text = self.engine.evaluateText(stuff[0])
if text is None:
return
if text is self.Default:
self.interpret(stuff[1])
return
s = escape(text)
self._stream_write(s)
i = s.rfind('\n')
if i < 0:
self.col = self.col + len(s)
else:
self.col = len(s) - (i + 1)
bytecode_handlers["insertText"] = do_insertText
def do_i18nVariable(self, stuff):
varname, program, expression = stuff
if expression is None:
# The value is implicitly the contents of this tag, so we have to
# evaluate the mini-program to get the value of the variable.
state = self.saveState()
try:
tmpstream = self.StringIO()
self.interpretWithStream(program, tmpstream)
value = normalize(tmpstream.getvalue())
finally:
self.restoreState(state)
else:
# Evaluate the value to be associated with the variable in the
# i18n interpolation dictionary.
value = self.engine.evaluate(expression)
# Either the i18n:name tag is nested inside an i18n:translate in which
# case the last item on the stack has the i18n dictionary and string
# representation, or the i18n:name and i18n:translate attributes are
# in the same tag, in which case the i18nStack will be empty. In that
# case we can just output the ${name} to the stream
i18ndict, srepr = self.i18nStack[-1]
i18ndict[varname] = value
placeholder = '${%s}' % varname
srepr.append(placeholder)
self._stream_write(placeholder)
bytecode_handlers['i18nVariable'] = do_i18nVariable
def do_insertTranslation(self, stuff):
i18ndict = {}
srepr = []
obj = None
self.i18nStack.append((i18ndict, srepr))
msgid = stuff[0]
# We need to evaluate the content of the tag because that will give us
# several useful pieces of information. First, the contents will
# include an implicit message id, if no explicit one was given.
# Second, it will evaluate any i18nVariable definitions in the body of
# the translation (necessary for $varname substitutions).
#
# Use a temporary stream to capture the interpretation of the
# subnodes, which should /not/ go to the output stream.
tmpstream = self.StringIO()
self.interpretWithStream(stuff[1], tmpstream)
default = tmpstream.getvalue()
# We only care about the evaluated contents if we need an implicit
# message id. All other useful information will be in the i18ndict on
# the top of the i18nStack.
if msgid == '':
msgid = normalize(default)
self.i18nStack.pop()
# See if there is was an i18n:data for msgid
if len(stuff) > 2:
obj = self.engine.evaluate(stuff[2])
xlated_msgid = self.translate(msgid, default, i18ndict, obj)
assert xlated_msgid is not None, self.position
self._stream_write(xlated_msgid)
bytecode_handlers['insertTranslation'] = do_insertTranslation
def do_insertStructure(self, stuff):
self.interpret(stuff[2])
def do_insertStructure_tal(self, (expr, repldict, block)):
structure = self.engine.evaluateStructure(expr)
if structure is None:
return
if structure is self.Default:
self.interpret(block)
return
text = ustr(structure)
if not (repldict or self.strictinsert):
# Take a shortcut, no error checking
self.stream_write(text)
return
if self.html:
self.insertHTMLStructure(text, repldict)
else:
self.insertXMLStructure(text, repldict)
bytecode_handlers["insertStructure"] = do_insertStructure
def insertHTMLStructure(self, text, repldict):
from HTMLTALParser import HTMLTALParser
gen = AltTALGenerator(repldict, self.engine.getCompiler(), 0)
p = HTMLTALParser(gen) # Raises an exception if text is invalid
p.parseString(text)
program, macros = p.getCode()
self.interpret(program)
def insertXMLStructure(self, text, repldict):
from TALParser import TALParser
gen = AltTALGenerator(repldict, self.engine.getCompiler(), 0)
p = TALParser(gen)
gen.enable(0)
p.parseFragment('')
gen.enable(1)
p.parseFragment(text) # Raises an exception if text is invalid
gen.enable(0)
p.parseFragment('', 1)
program, macros = gen.getCode()
self.interpret(program)
def do_loop(self, (name, expr, block)):
self.interpret(block)
def do_loop_tal(self, (name, expr, block)):
iterator = self.engine.setRepeat(name, expr)
while iterator.next():
self.interpret(block)
bytecode_handlers["loop"] = do_loop
def translate(self, msgid, default, i18ndict, obj=None):
if obj:
i18ndict.update(obj)
if not self.i18nInterpolate:
return msgid
# XXX We need to pass in one of context or target_language
return self.engine.translate(self.i18nContext.domain,
msgid, i18ndict, default=default)
def do_rawtextColumn(self, (s, col)):
self._stream_write(s)
self.col = col
bytecode_handlers["rawtextColumn"] = do_rawtextColumn
def do_rawtextOffset(self, (s, offset)):
self._stream_write(s)
self.col = self.col + offset
bytecode_handlers["rawtextOffset"] = do_rawtextOffset
def do_condition(self, (condition, block)):
if not self.tal or self.engine.evaluateBoolean(condition):
self.interpret(block)
bytecode_handlers["condition"] = do_condition
def do_defineMacro(self, (macroName, macro)):
macs = self.macroStack
if len(macs) == 1:
entering = macs[-1][2]
if not entering:
macs.append(None)
self.interpret(macro)
assert macs[-1] is None
macs.pop()
return
self.interpret(macro)
bytecode_handlers["defineMacro"] = do_defineMacro
def do_useMacro(self, (macroName, macroExpr, compiledSlots, block)):
if not self.metal:
self.interpret(block)
return
macro = self.engine.evaluateMacro(macroExpr)
if macro is self.Default:
macro = block
else:
if not isCurrentVersion(macro):
raise METALError("macro %s has incompatible version %s" %
(`macroName`, `getProgramVersion(macro)`),
self.position)
mode = getProgramMode(macro)
if mode != (self.html and "html" or "xml"):
raise METALError("macro %s has incompatible mode %s" %
(`macroName`, `mode`), self.position)
self.pushMacro(macroName, compiledSlots)
prev_source = self.sourceFile
self.interpret(macro)
if self.sourceFile != prev_source:
self.engine.setSourceFile(prev_source)
self.sourceFile = prev_source
self.popMacro()
bytecode_handlers["useMacro"] = do_useMacro
def do_fillSlot(self, (slotName, block)):
# This is only executed if the enclosing 'use-macro' evaluates
# to 'default'.
self.interpret(block)
bytecode_handlers["fillSlot"] = do_fillSlot
def do_defineSlot(self, (slotName, block)):
if not self.metal:
self.interpret(block)
return
macs = self.macroStack
if macs and macs[-1] is not None:
macroName, slots = self.popMacro()[:2]
slot = slots.get(slotName)
if slot is not None:
prev_source = self.sourceFile
self.interpret(slot)
if self.sourceFile != prev_source:
self.engine.setSourceFile(prev_source)
self.sourceFile = prev_source
self.pushMacro(macroName, slots, entering=0)
return
self.pushMacro(macroName, slots)
# Falling out of the 'if' allows the macro to be interpreted.
self.interpret(block)
bytecode_handlers["defineSlot"] = do_defineSlot
def do_onError(self, (block, handler)):
self.interpret(block)
def do_onError_tal(self, (block, handler)):
state = self.saveState()
self.stream = stream = self.StringIO()
self._stream_write = stream.write
try:
self.interpret(block)
except:
exc = sys.exc_info()[1]
self.restoreState(state)
engine = self.engine
engine.beginScope()
error = engine.createErrorInfo(exc, self.position)
engine.setLocal('error', error)
try:
self.interpret(handler)
finally:
engine.endScope()
else:
self.restoreOutputState(state)
self.stream_write(stream.getvalue())
bytecode_handlers["onError"] = do_onError
bytecode_handlers_tal = bytecode_handlers.copy()
bytecode_handlers_tal["rawtextBeginScope"] = do_rawtextBeginScope_tal
bytecode_handlers_tal["beginScope"] = do_beginScope_tal
bytecode_handlers_tal["setLocal"] = do_setLocal_tal
bytecode_handlers_tal["setGlobal"] = do_setGlobal_tal
bytecode_handlers_tal["insertStructure"] = do_insertStructure_tal
bytecode_handlers_tal["insertText"] = do_insertText_tal
bytecode_handlers_tal["loop"] = do_loop_tal
bytecode_handlers_tal["onError"] = do_onError_tal
bytecode_handlers_tal[""] = attrAction_tal
bytecode_handlers_tal["optTag"] = do_optTag_tal
class FasterStringIO(StringIO):
"""Append-only version of StringIO.
This let's us have a much faster write() method.
"""
def close(self):
if not self.closed:
self.write = _write_ValueError
StringIO.close(self)
def seek(self, pos, mode=0):
raise RuntimeError("FasterStringIO.seek() not allowed")
def write(self, s):
#assert self.pos == self.len
self.buflist.append(s)
self.len = self.pos = self.pos + len(s)
def _write_ValueError(s):
raise ValueError, "I/O operation on closed file"
code-db8659c4e8eb/roundup/cgi/TAL/TALParser.py 0000644 0000000 0000000 00000011227 13303235466 017065 0 ustar 0000000 0000000 ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""
Parse XML and compile to TALInterpreter intermediate code.
"""
from XMLParser import XMLParser
from TALDefs import XML_NS, ZOPE_I18N_NS, ZOPE_METAL_NS, ZOPE_TAL_NS
from TALGenerator import TALGenerator
class TALParser(XMLParser):
ordered_attributes = 1
def __init__(self, gen=None): # Override
XMLParser.__init__(self)
if gen is None:
gen = TALGenerator()
self.gen = gen
self.nsStack = []
self.nsDict = {XML_NS: 'xml'}
self.nsNew = []
def getCode(self):
return self.gen.getCode()
def getWarnings(self):
return ()
def StartNamespaceDeclHandler(self, prefix, uri):
self.nsStack.append(self.nsDict.copy())
self.nsDict[uri] = prefix
self.nsNew.append((prefix, uri))
def EndNamespaceDeclHandler(self, prefix):
self.nsDict = self.nsStack.pop()
def StartElementHandler(self, name, attrs):
if self.ordered_attributes:
# attrs is a list of alternating names and values
attrlist = []
for i in range(0, len(attrs), 2):
key = attrs[i]
value = attrs[i+1]
attrlist.append((key, value))
else:
# attrs is a dict of {name: value}
attrlist = attrs.items()
attrlist.sort() # For definiteness
name, attrlist, taldict, metaldict, i18ndict \
= self.process_ns(name, attrlist)
attrlist = self.xmlnsattrs() + attrlist
self.gen.emitStartElement(name, attrlist, taldict, metaldict, i18ndict)
def process_ns(self, name, attrlist):
taldict = {}
metaldict = {}
i18ndict = {}
fixedattrlist = []
name, namebase, namens = self.fixname(name)
for key, value in attrlist:
key, keybase, keyns = self.fixname(key)
ns = keyns or namens # default to tag namespace
item = key, value
if ns == 'metal':
metaldict[keybase] = value
item = item + ("metal",)
elif ns == 'tal':
taldict[keybase] = value
item = item + ("tal",)
elif ns == 'i18n':
assert 0, "dealing with i18n: " + `(keybase, value)`
i18ndict[keybase] = value
item = item + ('i18n',)
fixedattrlist.append(item)
if namens in ('metal', 'tal', 'i18n'):
taldict['tal tag'] = namens
return name, fixedattrlist, taldict, metaldict, i18ndict
def xmlnsattrs(self):
newlist = []
for prefix, uri in self.nsNew:
if prefix:
key = "xmlns:" + prefix
else:
key = "xmlns"
if uri in (ZOPE_METAL_NS, ZOPE_TAL_NS, ZOPE_I18N_NS):
item = (key, uri, "xmlns")
else:
item = (key, uri)
newlist.append(item)
self.nsNew = []
return newlist
def fixname(self, name):
if ' ' in name:
uri, name = name.split(' ')
prefix = self.nsDict[uri]
prefixed = name
if prefix:
prefixed = "%s:%s" % (prefix, name)
ns = 'x'
if uri == ZOPE_TAL_NS:
ns = 'tal'
elif uri == ZOPE_METAL_NS:
ns = 'metal'
elif uri == ZOPE_I18N_NS:
ns = 'i18n'
return (prefixed, name, ns)
return (name, name, None)
def EndElementHandler(self, name):
name = self.fixname(name)[0]
self.gen.emitEndElement(name)
def DefaultHandler(self, text):
self.gen.emitRawText(text)
def test():
import sys
p = TALParser()
file = "tests/input/test01.xml"
if sys.argv[1:]:
file = sys.argv[1]
p.parseFile(file)
program, macros = p.getCode()
from TALInterpreter import TALInterpreter
from DummyEngine import DummyEngine
engine = DummyEngine(macros)
TALInterpreter(program, macros, engine, sys.stdout, wrap=0)()
if __name__ == "__main__":
test()
code-db8659c4e8eb/roundup/cgi/TAL/TranslationContext.py 0000644 0000000 0000000 00000002652 13303235466 021135 0 ustar 0000000 0000000 ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Translation context object for the TALInterpreter's I18N support.
The translation context provides a container for the information
needed to perform translation of a marked string from a page template.
"""
DEFAULT_DOMAIN = "default"
class TranslationContext:
"""Information about the I18N settings of a TAL processor."""
def __init__(self, parent=None, domain=None, target=None, source=None):
if parent:
if not domain:
domain = parent.domain
if not target:
target = parent.target
if not source:
source = parent.source
elif domain is None:
domain = DEFAULT_DOMAIN
self.parent = parent
self.domain = domain
self.target = target
self.source = source
code-db8659c4e8eb/roundup/cgi/TAL/XMLParser.py 0000644 0000000 0000000 00000006010 13303235466 017077 0 ustar 0000000 0000000 ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
#
##############################################################################
# Modifications for Roundup:
# 1. commented out zLOG references
"""
Generic expat-based XML parser base class.
"""
#import zLOG
class XMLParser:
ordered_attributes = 0
handler_names = [
"StartElementHandler",
"EndElementHandler",
"ProcessingInstructionHandler",
"CharacterDataHandler",
"UnparsedEntityDeclHandler",
"NotationDeclHandler",
"StartNamespaceDeclHandler",
"EndNamespaceDeclHandler",
"CommentHandler",
"StartCdataSectionHandler",
"EndCdataSectionHandler",
"DefaultHandler",
"DefaultHandlerExpand",
"NotStandaloneHandler",
"ExternalEntityRefHandler",
"XmlDeclHandler",
"StartDoctypeDeclHandler",
"EndDoctypeDeclHandler",
"ElementDeclHandler",
"AttlistDeclHandler"
]
def __init__(self, encoding=None):
self.parser = p = self.createParser()
if self.ordered_attributes:
try:
self.parser.ordered_attributes = self.ordered_attributes
except AttributeError:
#zLOG.LOG("TAL.XMLParser", zLOG.INFO,
# "Can't set ordered_attributes")
self.ordered_attributes = 0
for name in self.handler_names:
method = getattr(self, name, None)
if method is not None:
try:
setattr(p, name, method)
except AttributeError:
#zLOG.LOG("TAL.XMLParser", zLOG.PROBLEM,
# "Can't set expat handler %s" % name)
pass
def createParser(self, encoding=None):
global XMLParseError
try:
from Products.ParsedXML.Expat import pyexpat
XMLParseError = pyexpat.ExpatError
return pyexpat.ParserCreate(encoding, ' ')
except ImportError:
from xml.parsers import expat
XMLParseError = expat.ExpatError
return expat.ParserCreate(encoding, ' ')
def parseFile(self, filename):
self.parseStream(open(filename))
def parseString(self, s):
self.parser.Parse(s, 1)
def parseURL(self, url):
import urllib
self.parseStream(urllib.urlopen(url))
def parseStream(self, stream):
self.parser.ParseFile(stream)
def parseFragment(self, s, end=0):
self.parser.Parse(s, end)
code-db8659c4e8eb/roundup/cgi/TAL/__init__.py 0000644 0000000 0000000 00000001256 13303235466 017030 0 ustar 0000000 0000000 ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
#
##############################################################################
""" Template Attribute Language package """
code-db8659c4e8eb/roundup/cgi/TAL/markupbase.py 0000644 0000000 0000000 00000025004 13303235466 017420 0 ustar 0000000 0000000 """Shared support for scanning document type declarations in HTML and XHTML."""
import re, string
_declname_match = re.compile(r'[a-zA-Z][-_.a-zA-Z0-9]*\s*').match
_declstringlit_match = re.compile(r'(\'[^\']*\'|"[^"]*")\s*').match
del re
class ParserBase:
"""Parser base class which provides some common support methods used
by the SGML/HTML and XHTML parsers."""
def reset(self):
self.lineno = 1
self.offset = 0
def getpos(self):
"""Return current line number and offset."""
return self.lineno, self.offset
def error(self, message):
"""Return an error, showing current line number and offset.
Concrete subclasses *must* override this method.
"""
raise NotImplementedError
# Internal -- update line number and offset. This should be
# called for each piece of data exactly once, in order -- in other
# words the concatenation of all the input strings to this
# function should be exactly the entire input.
def updatepos(self, i, j):
if i >= j:
return j
rawdata = self.rawdata
nlines = rawdata.count("\n", i, j)
if nlines:
self.lineno = self.lineno + nlines
pos = rawdata.rindex("\n", i, j) # Should not fail
self.offset = j-(pos+1)
else:
self.offset = self.offset + j-i
return j
_decl_otherchars = ''
# Internal -- parse declaration (for use by subclasses).
def parse_declaration(self, i):
# This is some sort of declaration; in "HTML as
# deployed," this should only be the document type
# declaration ("").
rawdata = self.rawdata
import sys
j = i + 2
assert rawdata[i:j] == "'
n = len(rawdata)
decltype, j = self._scan_name(j, i)
if j < 0:
return j
if decltype == "doctype":
self._decl_otherchars = ''
while j < n:
c = rawdata[j]
if c == ">":
# end of declaration syntax
data = rawdata[i+2:j]
if decltype == "doctype":
self.handle_decl(data)
else:
self.unknown_decl(data)
return j + 1
if c in "\"'":
m = _declstringlit_match(rawdata, j)
if not m:
return -1 # incomplete
j = m.end()
elif c in "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ":
name, j = self._scan_name(j, i)
elif c in self._decl_otherchars:
j = j + 1
elif c == "[":
if decltype == "doctype":
j = self._parse_doctype_subset(j + 1, i)
else:
self.error("unexpected '[' char in declaration")
else:
self.error(
"unexpected %s char in declaration" % `rawdata[j]`)
if j < 0:
return j
return -1 # incomplete
# Internal -- scan past the internal subset in a n:
# end of buffer; incomplete
return -1
if rawdata[j:j+4] == "