extended image handles foreign images

1 files changed, 22 insertions, 12 deletions

diff --git a/extendedimage.py b/extendedimage.py
index 4babc03..cec690f 100644
--- a/extendedimage.py
+++ b/extendedimage.py
@@ -11,6 +11,7 @@ Parameters can be encapsulated in double-quotes. Use "" for empty parameter.
 """
 from marko import inline
 from marko.helpers import MarkoExtension
+from . import utils
 
 
 class ExtendedImageElement(inline.InlineElement):
@@ -32,20 +33,29 @@ class ExtendedImageElement(inline.InlineElement):
         return text
 
 
-class ExtendedImageRenderer:
-    def render_extended_image_element(self, element):
-        img = f'<img src="{element.src}" title="{element.title}" alt="{element.alt}" />'
+def __create_image_renderer(filters: list[str]):
+    class ExtendedImageRenderer:
+        FILTERS = filters
 
-        if element.href != "":
-            img = f'<a href="{element.href}">{img}</a>'
+        def render_extended_image_element(self, element):
+            img = f'<img src="{element.src}" title="{element.title}" alt="{element.alt}" />'
 
-        if element.figcaption != "":
-            img = f"<figure>{img}<figcaption>{element.figcaption}</figcaption></figure>"
+            if element.href != "":
+                img = f'<a href="{element.href}" {"target=\"_blank\"" if utils.is_foreign_url(element.href, ExtendedImageRenderer.FILTERS) else ""}>{img}</a>'
 
-        return img
+            if element.figcaption != "":
+                img = f"<figure>{img}<figcaption>{element.figcaption}</figcaption></figure>"
 
+            return img
 
-ExtendedImage = MarkoExtension(
-    elements=[ExtendedImageElement],
-    renderer_mixins=[ExtendedImageRenderer]
-)
+    return ExtendedImageRenderer
+
+
+def get_image_renderer(filters: list[str] = None):
+    if filters is None:
+        filters = []
+
+    return MarkoExtension(
+        elements=[ExtendedImageElement],
+        renderer_mixins=[__create_image_renderer(filters)]
+    )