Merge pull request #918 from taigaio/svg-thumbnail-generation

Add svg thumbnail generation

CHANGELOG.md

@@ -8,11 +8,12 @@
 - Ability to create rich text custom fields in Epics, User Stories, Tasks and Isues.
 - Full text search now use simple as tokenizer so search with non-english text are allowed.
 - Duplicate project: allows creating a new project based on the structure of another (status, tags, colors, default values...)
+- Add thumbnails for PSD files.
+- Add thumbnails for SVG files (Cario lib is needed).
 - i18n:
   - Add japanese (ja) translation.
   - Add korean (ko) translation.
   - Add chinese simplified (zh-Hans) translation.
-- Add thumbnails for PSD files.
 
 ### Misc
 - API:

requirements.txt

@@ -34,3 +34,4 @@ python-dateutil==2.6.0
 netaddr==0.7.18
 serpy==0.1.1
 psd-tools==1.4
+CairoSVG==2.0.1

taiga/base/utils/thumbnails.py

@@ -26,12 +26,28 @@ from taiga.base.utils.urls import get_absolute_url
 from easy_thumbnails.files import get_thumbnailer
 from easy_thumbnails.exceptions import InvalidImageFormatError
 from PIL import Image
+from PIL.PngImagePlugin import PngImageFile
 
+from io import BytesIO
 
+# SVG thumbnail generator
+try:
+    from cairosvg.surface import PNGSurface
+
+    def svg_image_factory(data, *args):
+        png_data = PNGSurface.convert(data.read())
+        return PngImageFile(BytesIO(png_data))
+
+    Image.register_mime("SVG", "image/svg+xml")
+    Image.register_extension("SVG", ".svg")
+    Image.register_open("SVG", svg_image_factory)
+except Exception:
+    pass
+
+# PSD thumbnail generator
 def psd_image_factory(data, *args):
     return PSDImage.from_stream(data).as_PIL()
 
-
 Image.init()
 Image.register_open("PSD", psd_image_factory)