Better code chunk extraction

[PMassicotte]

Below a detailed description of this PR using Copilot. Basically, it introduces a new class Chunk and various helper function to get and filter chunks in quarto and rmd documents. It also refactors the sending of current and all above chunks.

The only user-visible change aligns with a discussion point: when sending all above chunks, the current chunk is now excluded. This approach ensures that partial code isn't mistakenly sent to the terminal, preventing execution errors—particularly when sending all above chunks alongside individual lines from the current chunk.

For example:

plot(1)

this_is_a_long_function(
  1,
  2,
  3,  # cursor here
  4,
  5,
  6
)

It will send the incomplete code.

plot(1)

this_is_a_long_function(
  1,
  2,
  3,  

---

This pull request introduces several significant changes to the handling of code chunks in R and Quarto documents, including the addition of a new Chunk class, refactoring of functions for sending code chunks, and enhancements to the way code chunks are parsed and executed.

Improvements to code chunk handling:

• lua/r/quarto.lua: Introduced a new Chunk class to encapsulate code chunk properties and added several helper functions to parse and manage code chunks. These functions include get_code_chunks, parse_info_string_params, parse_code_chunk_params, get_current_code_chunk, get_chunks_above_cursor, get_all_code_chunks, filter_code_chunks_by_lang, filter_code_chunks_by_eval, and codelines_from_chunks. [1] [2]

Refactoring of functions for sending code chunks:

• lua/r/maps.lua: Updated the key mappings to use the new send_current_chunk function instead of send_R_chunk.
• lua/r/rmd.lua: Refactored the send_R_chunk and send_py_chunk functions into a single send_current_chunk function that handles both R and Python code chunks.
• lua/r/send.lua: Added a new source_chunk function to send code chunks to the R console and updated the chunks_up_to_here function to use the new chunk handling methods. [1] [2]

Dependency updates:

• lua/r/rmd.lua: Added a dependency on the new quarto module.
• lua/r/send.lua: Added a dependency on the new quarto module.

[jalvesaq]

I rebased the pull request on the main branch.

[PMassicotte]

No rush to merge if you want to test it. I have used this branch for the last 2–3 days without issue. Do not hesitate to co-author some code if you have suggestion/comment

[jalvesaq]

I can't review it carefully for the next days, and almost never someone comment on pull requests. So, we have to merge them to make people try the code. I think we can merge it now.

[PMassicotte]

Sounds good!

[jalvesaq]

Thanks!