From ed0aa1323a7acae363c670cc1dd6611c09e0c3fb Mon Sep 17 00:00:00 2001
From: Botond Hende <nettingman@gmail.com>
Date: Thu, 8 Aug 2024 21:39:17 +0200
Subject: extended image handles foreign images

---
 extendedimage.py | 34 ++++++++++++++++++++++------------
 newtablink.py    |  5 ++---
 utils.py         |  3 +++
 3 files changed, 27 insertions(+), 15 deletions(-)
 create mode 100644 utils.py

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)]
+    )
diff --git a/newtablink.py b/newtablink.py
index df42833..621424d 100644
--- a/newtablink.py
+++ b/newtablink.py
@@ -7,6 +7,7 @@ MyExtension = get_new_tab_links(["example.org"])
 """
 import marko.inline
 from marko.helpers import MarkoExtension
+from . import utils
 
 
 def __create_new_tab_links(filters: list[str]):
@@ -14,9 +15,7 @@ def __create_new_tab_links(filters: list[str]):
         FILTERS = filters
 
         def render_link(self, element: marko.inline.Link) -> str:
-            dest_lower = element.dest.lower()
-
-            if (dest_lower.startswith("http://") or dest_lower.startswith("https://")) and not any((elem in dest_lower for elem in NewTabLinks.FILTERS)):
+            if utils.is_foreign_url(element.dest, NewTabLinks.FILTERS):
                 return f"<a href=\"{element.dest}\" target=\"_blank\">{self.render_children(element)}</a>"
 
             return super().render_link(element)
diff --git a/utils.py b/utils.py
new file mode 100644
index 0000000..ea5e0c1
--- /dev/null
+++ b/utils.py
@@ -0,0 +1,3 @@
+def is_foreign_url(link: str, filters: list[str]):
+    dest_lower = link.lower()
+    return (dest_lower.startswith("http://") or dest_lower.startswith("https://")) and not any((elem in dest_lower for elem in filters))
\ No newline at end of file
-- 
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