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import sys
ALL_TEMPLATE_MAP = {}
def get_line_map(filename):
if filename not in ALL_TEMPLATE_MAP:
with open(filename) as template_file:
template_source = template_file.read()
line_lengths = [len(l) for l in template_source.splitlines(True)]
ALL_TEMPLATE_MAP[filename] = list(running_sum(line_lengths))
return ALL_TEMPLATE_MAP[filename]
def get_line_number(line_map, offset):
for lineno, line_offset in enumerate(line_map, start=1):
if line_offset >= offset:
return lineno
return -1
class DjangoTracer(object):
def should_trace(self, canonical):
return "/django/template/" in canonical
def source(self, frame):
if frame.f_code.co_name != 'render':
return None
that = frame.f_locals['self']
return getattr(that, "source", None)
def file_name(self, frame):
source = self.source(frame)
if not source:
return None
return source[0].name.encode(sys.getfilesystemencoding())
def line_number_range(self, frame):
source = self.source(frame)
if not source:
return -1, -1
filename = source[0].name
line_map = get_line_map(filename)
start = get_line_number(line_map, source[1][0])
end = get_line_number(line_map, source[1][1])
if start < 0 or end < 0:
return -1, -1
return start, end
def running_sum(seq):
total = 0
for num in seq:
total += num
yield total
def ppp(obj):
ret = []
import inspect
for name, value in inspect.getmembers(obj):
if not callable(value):
ret.append("%s=%r" % (name, value))
attrs = ", ".join(ret)
return "%s: %s" % (obj.__class__, attrs)
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