X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/1ca6872afcca0bb6fb4c0c11fdad3b760a2362a1..dfd584e3b136d770bf56569030d10712a8722569:/apps/picture/templatetags/picture_tags.py

diff --git a/apps/picture/templatetags/picture_tags.py b/apps/picture/templatetags/picture_tags.py
index 3fe5b360c..1767ce228 100644
--- a/apps/picture/templatetags/picture_tags.py
+++ b/apps/picture/templatetags/picture_tags.py
@@ -1,26 +1,67 @@
+# -*- coding: utf-8 -*-
+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
 from django import template
-from django.template import Node, Variable, Template, Context
 from catalogue.utils import split_tags
+from ..engine import CustomCroppingEngine
+import sorl.thumbnail.default
+import logging
 
 register = template.Library()
 
+cropper = CustomCroppingEngine()
+
 @register.inclusion_tag('picture/picture_short.html', takes_context=True)
 def picture_short(context, picture):
-    return {
+    context.update({
         'picture': picture,
         'main_link': picture.get_absolute_url(),
-        # 'related': picture.related_info(),
         'request': context.get('request'),
         'tags': split_tags(picture.tags),
-        }
-                            
+        })
+    return context
+
 @register.inclusion_tag('picture/picture_wide.html', takes_context=True)
 def picture_wide(context, picture):
-    return {
+    context.update({
         'picture': picture,
         'main_link': picture.get_absolute_url(),
-        # 'related': picture.related_info(),
         'request': context.get('request'),
         'tags': split_tags(picture.tags),
-        }
+        })
+    return context
+
+
+@register.simple_tag()
+def area_thumbnail_url(area, geometry):
+    def to_square(coords):
+        w = coords[1][0] - coords[0][0]
+        h = coords[1][1] - coords[0][1]
+        if w == h:
+            return coords
+        elif w > h:
+            return [[coords[0][0] + w/2 - h/2, coords[0][1]],
+                    [coords[1][0] - w/2 + h/2, coords[1][1]]]
+        else:
+            return [[coords[0][0], coords[0][1] + h/2 - w/2],
+                    [coords[1][0], coords[1][1] - h/2 + w/2, ]]
+
+    # so much for sorl extensibility.
+    # what to do about this?
+    _engine = sorl.thumbnail.default.engine
+    sorl.thumbnail.default.engine = cropper
+    coords = to_square(area.area)
+
+    try:
+        th = sorl.thumbnail.default.backend.get_thumbnail(
+            area.picture.image_file,
+            geometry,
+            crop="%dpx %dpx %dpx %dpx" % tuple(map(lambda d: max(0, d), tuple(coords[0] + coords[1]))))
+    except Exception, e:
+        logging.exception("Error creating a thumbnail for PictureArea")
+        return ''
+
+    sorl.thumbnail.default.engine = _engine
 
+    return th.url