"Copy template as markdown" button. (#3719)

* Added: Copy template info button

* Consistent with Ankidroid

* Fix: Missing newline

* Renamed variables

* ./check

* Fix: Remove ``` from templates

* Stylistic changes

* ./check

ftl/core/card-templates.ftl

@@ -37,6 +37,7 @@ card-templates-card = Card { $val }
 card-templates-card-types-for = Card Types for { $val }
 card-templates-cloze = Cloze { $val }
 card-templates-deck-override = Deck Override...
+card-templates-copy-info = Copy Info to Clipboard
 card-templates-delete-the-as-card-type-and = Delete the '{ $template }' card type, and its { $cards }?
 card-templates-enter-deck-to-place-new = Enter deck to place new { $val } cards in, or leave blank:
 card-templates-enter-new-card-position-1 = Enter new card position (1...{ $val }):

qt/aqt/clayout.py

@@ -754,6 +754,31 @@ class CardLayout(QDialog):
         dst["afmt"] = "{{FrontSide}}\n\n<hr id=answer>\n\n%s" % src["qfmt"]
         dst["qfmt"] = m.group(2).strip()
 
+    def onCopyMarkdown(self) -> None:
+        template = self.current_template()
+
+        def sanitizeMarkdown(md):
+            return md.replace("```", "\\`\\`\\`")
+
+        markdown = (
+            f"## Front Template\n"
+            "```html\n"
+            f"{sanitizeMarkdown(template['qfmt'])}\n"
+            "```\n"
+            "## Back Template\n"
+            "```html\n"
+            f"{sanitizeMarkdown(template['afmt'])}\n"
+            "```\n"
+            "## Styling\n"
+            "```css\n"
+            f"{sanitizeMarkdown(self.model['css'])}\n"
+            "```\n"
+        )
+        clipboard = QApplication.clipboard()
+        assert clipboard is not None
+        clipboard.setText(markdown)
+        tooltip(tr.about_copied_to_clipboard())
+
     def onMore(self) -> None:
         m = QMenu(self)
 
@@ -794,6 +819,10 @@ class CardLayout(QDialog):
             assert a is not None
             qconnect(a.triggered, self.onTargetDeck)
 
+            a = m.addAction(tr.card_templates_copy_info())
+            assert a is not None
+            qconnect(a.triggered, self.onCopyMarkdown)
+
         a = m.addAction(tr.card_templates_browser_appearance())
         assert a is not None
         qconnect(a.triggered, self.onBrowserDisplay)