Render centered and caption nodes transparently instead of dropping their text

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: calsmith1-nokia

sphinx_markdown_builder/translator.py

@@ -109,6 +109,8 @@
     tgroup=None,
     figure=None,
     desc_signature_line=None,
+    centered=None,  # Sphinx ".. centered::" directive — render inner text inline
+    caption=None,  # figure/code-block :caption: — emit the label text inline
 )
 
 

tests/expected/ExampleRSTFile.md

@@ -16,6 +16,7 @@ This file covers the following topics.
 > 
 > * [Heading Levels](#heading-levels)
 > * [Paragraph Text and Commented Text](#paragraph-text-and-commented-text)
+> * [Centered Text](#centered-text)
 > * [Ordered and Unordered Lists](#ordered-and-unordered-lists)
 > * [Conditional Text](#conditional-text)
 > * [Notes and Warnings](#notes-and-warnings)
@@ -65,6 +66,9 @@ Italics are rarely used. Text surrounded by single asterisks is rendered in
 Monospace text is used for `code examples`. Text surrounded by double grave
 accent characters is rendered in monospace font.
 
+## Centered Text
+
+Centered text here
 <!-- comments can be added in a file by starting a line with 2 periods and a space. -->
 
 In English source files, look for comments addressed to translators from writers.
@@ -598,6 +602,16 @@ being displayed in different colors.
 </problem>
 ```
 
+The following code block uses a `:caption:` to label the file name.
+
+example.py
+```python
+print("hello")
+```
+
+The following figure uses a caption to describe the image.
+
+![Captioned figure example.](static/markdown.png)Figure caption text.
 <!-- Taken from https://github.com/openedx/edx-documentation/blob/master/en_us/links/links.rst -->
 <!-- Include this file in any file that includes a non-doc link. -->
 

tests/expected/index.md

@@ -7,6 +7,7 @@
         * [Heading 5](ExampleRSTFile.md#heading-5)
           * [Heading 6](ExampleRSTFile.md#heading-6)
   * [Paragraph Text and Commented Text](ExampleRSTFile.md#paragraph-text-and-commented-text)
+  * [Centered Text](ExampleRSTFile.md#centered-text)
   * [Ordered and Unordered Lists](ExampleRSTFile.md#ordered-and-unordered-lists)
     * [Nested Lists or Content](ExampleRSTFile.md#nested-lists-or-content)
       * [Unordered List inside Ordered List](ExampleRSTFile.md#unordered-list-inside-ordered-list)

tests/source/ExampleRSTFile.rst

@@ -66,6 +66,12 @@ Italics are rarely used. Text surrounded by single asterisks is rendered in
 Monospace text is used for ``code examples``. Text surrounded by double grave
 accent characters is rendered in monospace font.
 
+*****************
+Centered Text
+*****************
+
+.. centered:: Centered text here
+
 .. comments can be added in a file by starting a line with 2 periods and a space.
 
 In English source files, look for comments addressed to translators from writers.
@@ -778,4 +784,18 @@ being displayed in different colors.
       </solution>
     </problem>
 
+The following code block uses a ``:caption:`` to label the file name.
+
+.. code-block:: python
+   :caption: example.py
+
+   print("hello")
+
+The following figure uses a caption to describe the image.
+
+.. figure:: /static/markdown.png
+   :alt: Captioned figure example.
+
+   Figure caption text.
+
 .. include:: links.rst