Modifies EXIF section with Camera Info, display toggle and template styling

mediagoblin/db/mixin.py

@@ -237,6 +237,33 @@ class MediaEntryMixin(GenerateSlugMixin):
             label = re.sub('(.)([A-Z][a-z]+)', r'\1 \2', key)
             yield label.replace('EXIF', '').replace('Image', ''), exif_all[key]
 
+    def exif_display_data_short(self):
+        """Display a very short practical version of exif info"""
+        import time, datetime
+        if not self.media_data:
+            return
+        exif_all = self.media_data.get("exif_all")
+        # format date taken
+        takendate = datetime.datetime.strptime(
+            exif_all['Image DateTimeOriginal']['printable'],
+            '%Y:%m:%d %H:%M:%S').date()
+        taken = takendate.strftime('%B %d %Y')
+        fnum = str(exif_all['EXIF FNumber']['printable']).split('/')
+        # calculate aperture
+        if len(fnum) == 2:
+            aperture = "f/%.1f" % (float(fnum[0])/float(fnum[1]))
+        elif fnum[0] != 'None':
+            aperture = "f/%s" % (fnum[0])
+        else:
+            aperture = None
+        return {
+            "Camera" : exif_all['Image Model']['printable'],
+            "Exposure" : '%s sec' % exif_all['EXIF ExposureTime']['printable'],
+            "Aperture" : aperture,
+            "ISO" : exif_all['EXIF ISOSpeedRatings']['printable'],
+            "Focal Length" : '%s mm' % exif_all['EXIF FocalLength']['printable'],
+            "Date Taken" : taken,
+        }
 
 class MediaCommentMixin(object):
     @property