98 lines
3.5 KiB
Python
98 lines
3.5 KiB
Python
from django.template import Lexer, Parser, tag_re, NodeList, VariableNode, TemplateSyntaxError
|
|
from django.utils.encoding import force_unicode
|
|
from django.utils.html import escape
|
|
from django.utils.safestring import SafeData, EscapeData
|
|
|
|
class DebugLexer(Lexer):
|
|
def __init__(self, template_string, origin):
|
|
super(DebugLexer, self).__init__(template_string, origin)
|
|
|
|
def tokenize(self):
|
|
"Return a list of tokens from a given template_string"
|
|
result, upto = [], 0
|
|
for match in tag_re.finditer(self.template_string):
|
|
start, end = match.span()
|
|
if start > upto:
|
|
result.append(self.create_token(self.template_string[upto:start], (upto, start), False))
|
|
upto = start
|
|
result.append(self.create_token(self.template_string[start:end], (start, end), True))
|
|
upto = end
|
|
last_bit = self.template_string[upto:]
|
|
if last_bit:
|
|
result.append(self.create_token(last_bit, (upto, upto + len(last_bit)), False))
|
|
return result
|
|
|
|
def create_token(self, token_string, source, in_tag):
|
|
token = super(DebugLexer, self).create_token(token_string, in_tag)
|
|
token.source = self.origin, source
|
|
return token
|
|
|
|
class DebugParser(Parser):
|
|
def __init__(self, lexer):
|
|
super(DebugParser, self).__init__(lexer)
|
|
self.command_stack = []
|
|
|
|
def enter_command(self, command, token):
|
|
self.command_stack.append( (command, token.source) )
|
|
|
|
def exit_command(self):
|
|
self.command_stack.pop()
|
|
|
|
def error(self, token, msg):
|
|
return self.source_error(token.source, msg)
|
|
|
|
def source_error(self, source,msg):
|
|
e = TemplateSyntaxError(msg)
|
|
e.source = source
|
|
return e
|
|
|
|
def create_nodelist(self):
|
|
return DebugNodeList()
|
|
|
|
def create_variable_node(self, contents):
|
|
return DebugVariableNode(contents)
|
|
|
|
def extend_nodelist(self, nodelist, node, token):
|
|
node.source = token.source
|
|
super(DebugParser, self).extend_nodelist(nodelist, node, token)
|
|
|
|
def unclosed_block_tag(self, parse_until):
|
|
command, source = self.command_stack.pop()
|
|
msg = "Unclosed tag '%s'. Looking for one of: %s " % (command, ', '.join(parse_until))
|
|
raise self.source_error(source, msg)
|
|
|
|
def compile_function_error(self, token, e):
|
|
if not hasattr(e, 'source'):
|
|
e.source = token.source
|
|
|
|
class DebugNodeList(NodeList):
|
|
def render_node(self, node, context):
|
|
try:
|
|
result = node.render(context)
|
|
except TemplateSyntaxError, e:
|
|
if not hasattr(e, 'source'):
|
|
e.source = node.source
|
|
raise
|
|
except Exception, e:
|
|
from sys import exc_info
|
|
wrapped = TemplateSyntaxError(u'Caught an exception while rendering: %s' % force_unicode(e, errors='replace'))
|
|
wrapped.source = node.source
|
|
wrapped.exc_info = exc_info()
|
|
raise wrapped
|
|
return result
|
|
|
|
class DebugVariableNode(VariableNode):
|
|
def render(self, context):
|
|
try:
|
|
output = force_unicode(self.filter_expression.resolve(context))
|
|
except TemplateSyntaxError, e:
|
|
if not hasattr(e, 'source'):
|
|
e.source = self.source
|
|
raise
|
|
except UnicodeDecodeError:
|
|
return ''
|
|
if (context.autoescape and not isinstance(output, SafeData)) or isinstance(output, EscapeData):
|
|
return escape(output)
|
|
else:
|
|
return output
|