WIP: Add extra for Lemmy spoiler format

lib/markdown2.py

@@ -2765,6 +2765,19 @@ def run(self, text):
         return self.fenced_code_block_re.sub(self.sub, text)
 
 
+class LemmySpoiler(Extra):
+    name = 'lemmy-spoiler'
+    order = (), (Stage.ITALIC_AND_BOLD,)
+
+    _lemmy_spoiler_re = re.compile(r":{3} spoiler\s+?(\S.+?\n)(.+?)\n:{3}", re.S)
+
+    def run(self, text):
+        return self._lemmy_spoiler_re.sub(r"<details><summary>\1</summary>\2</details>", text)
+
+    def test(self, text):
+        return '::: spoiler' in text
+
+
 class LinkPatterns(Extra):
     '''
     Auto-link given regex patterns in text (e.g. bug number
@@ -3328,6 +3341,7 @@ def test(self, text):
 Breaks.register()
 CodeFriendly.register()
 FencedCodeBlocks.register()
+LemmySpoiler.register()
 LinkPatterns.register()
 MarkdownInHTML.register()
 MiddleWordEm.register()

test/tm-cases/lemmy-spoiler.html

@@ -0,0 +1,6 @@
+<p><details><summary>this part is visible
+</summary>but this part will be hidden</details></p>
+
+<p><details><summary>this part is visible
+</summary>but this part
+and this part are hidden</details></p>

test/tm-cases/lemmy-spoiler.opts

@@ -0,0 +1 @@
+{"extras": ["lemmy-spoiler"]}

test/tm-cases/lemmy-spoiler.tags

@@ -0,0 +1 @@
+extras lemmy-spoiler

test/tm-cases/lemmy-spoiler.text

@@ -0,0 +1,8 @@
+::: spoiler this part is visible
+but this part will be hidden
+:::
+
+::: spoiler this part is visible
+but this part
+and this part are hidden
+:::