--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/pyramid/debug_source_code.py	Tue Oct 08 22:14:06 2019 +0200
@@ -0,0 +1,77 @@
+# copyright 2019 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+#
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+#
+# This file is part of CubicWeb.
+#
+# CubicWeb is free software: you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Debug view for pyramid debug toolbar and others to help development
+"""
+
+import os
+
+from pyramid.response import Response
+from mako.template import Template
+
+from cubicweb.misc.source_highlight import highlight_html, generate_css, has_pygments
+
+
+DEBUG_DISPLAY_SOURCE_CODE_PATH = '_debug_display_source_code'
+
+
+def debug_display_source_code(request):
+    """
+    This view display a python source file content for making debugging easier.
+
+    It is only activated on debug mode (-D) for pyramid during development.
+
+    It will uses pygment if installed to colorize the source code.
+    """
+
+    if "file" not in request.params:
+        return Response('Error: you should have end up on this page following a link in the '
+                        'pyramid debug toolbar with the correct parameters.')
+
+    source_code_file = request.params["file"]
+
+    if not os.path.exists(source_code_file):
+        return Response("Error: file '%s' doesn't exist on the filesystem." % source_code_file)
+
+    try:
+        content = open(source_code_file, "r").read()
+    except Exception as e:
+        return Response("Error: while opening file '%s' got the error: %s" % (source_code_file, e))
+
+    lines = []
+    line_begin = request.params.get("line", None)
+    if line_begin:
+        line_end = request.params.get("end", line_begin)
+        lines = list(range(int(line_begin), int(line_end) + 1))
+
+    this_file_directory = os.path.split(os.path.realpath(__file__))[0]
+    template_filename = os.path.join(this_file_directory,
+                                     "debug_toolbar_templates/debug_source_code.mako")
+
+    html = Template(filename=template_filename).render(
+        file_path=source_code_file,
+        content=content,
+        has_pygments=has_pygments,
+        highlight_html=highlight_html,
+        css=generate_css(),
+        lines=lines,
+    )
+
+    return Response(html)