From c825406bc76342bb96af3790f81324ae803a0522 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20P=C3=A9ters?= <fpeters@entrouvert.com>
Date: Sat, 17 Oct 2015 14:29:54 +0200
Subject: [PATCH] forms: display a thumbnail of uploaded images in validation
 page (#8675)

---
 wcs/forms/root.py  | 15 ++++++++++++++-
 wcs/qommon/form.py |  5 ++---
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/wcs/forms/root.py b/wcs/forms/root.py
index 9c3dd1e..fbc04ab 100644
--- a/wcs/forms/root.py
+++ b/wcs/forms/root.py
@@ -21,6 +21,11 @@ import sys
 import urllib2
 
 try:
+    from PIL import Image
+except ImportError:
+    Image = None
+
+try:
     import qrcode
 except ImportError:
     qrcode = None
@@ -908,7 +913,15 @@ class FormPage(Directory):
         if tempfile['charset']:
             response.set_charset(tempfile['charset'])
 
-        return get_session().get_tempfile_content(t).get_file_pointer().read()
+        file_pointer = get_session().get_tempfile_content(t).get_file_pointer()
+        if Image is not None and get_request().form.get('thumbnail') == '1':
+            image = Image.open(file_pointer)
+            image.thumbnail((500, 300))
+            image_thumb_fp = StringIO()
+            image.save(image_thumb_fp, "PNG")
+            return image_thumb_fp.getvalue()
+        else:
+            return file_pointer.read()
 
     def validating(self, data):
         self.html_top(self.formdef.name)
diff --git a/wcs/qommon/form.py b/wcs/qommon/form.py
index 014007e..8315c9b 100644
--- a/wcs/qommon/form.py
+++ b/wcs/qommon/form.py
@@ -582,9 +582,8 @@ class FileWithPreviewWidget(CompositeWidget):
         elif temp:
             filetype = mimetypes.guess_type(temp.get('orig_filename', ''))
             if filetype and filetype[0] and filetype[0].startswith('image'):
-                r += htmltext('<img alt="%s" src="tempfile?t=%s" />' % \
-                                            (temp.get('orig_filename', ''),
-                                             self.get('token')))
+                r += htmltext('<img alt="" src="tempfile?t=%s&thumbnail=1" />' % \
+                                             self.get('token'))
 
         r += htmltext('</div>')
         return r.getvalue()
-- 
2.6.1