1 files changed, 61 insertions, 0 deletions
diff --git a/coverage/django.py b/coverage/django.py
new file mode 100644
index 00000000..00f2ed54
--- /dev/null
+++ b/coverage/django.py
@@ -0,0 +1,61 @@
+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)