From 109906043e0b95d49ea2d029bf9f14607eaeddf9 Mon Sep 17 00:00:00 2001
From: Florian Bruhin <git@the-compiler.org>
Date: Tue, 18 Feb 2014 12:10:36 +0100
Subject: [PATCH] Add a trace_lines util function

---
 qutebrowser/utils/misc.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/qutebrowser/utils/misc.py b/qutebrowser/utils/misc.py
index a7420bf35..3fdeec3b2 100644
--- a/qutebrowser/utils/misc.py
+++ b/qutebrowser/utils/misc.py
@@ -17,6 +17,7 @@
 
 """Other utilities which don't fit anywhere else."""
 
+import sys
 import os.path
 
 from PyQt5.QtCore import pyqtRemoveInputHook
@@ -50,3 +51,14 @@ def read_file(filename):
     fn = os.path.join(qutebrowser.basedir, filename)
     with open(fn, 'r', encoding='UTF-8') as f:
         return f.read()
+
+
+def trace_lines(do_trace):
+    def trace(frame, event, arg):
+        print("{}, {}:{}".format(event, frame.f_code.co_filename,
+                                 frame.f_lineno))
+        return trace
+    if do_trace:
+        sys.settrace(trace)
+    else:
+        sys.settrace(None)