fenced code block not syntax highlighted in marked down

[laoshaw]

I have ```cpp ``` for c++, and c for c, and python for python etc, i.e. the 'standard' markdown code block, however they're either displayed as a single color, or the code just disappears, the code block in markdown does not work for me on ubuntu 20.04 vim8.

[sotte]

@laoshaw thanks for reporting!

I was looking into other issues and can confirm that code block are not syntax highlighted.

Please provide a md snippet which contains an example in which the code is not displayed at all.

[sotte]

Note so self:
maybe related to this: 6d87e54

[laoshaw]

A markdown snippet:

## hello world for c++

```cpp 
#include <iostream>
int main(){ std::cout << "hello world" << std::endl;
```

## hello world for c

```c
#include <stdio.h>
int main(void) { printf("hello world\n");} 
```

[sotte]

Haha, the #include is interpreted as a heading and creates a new slide :)
The snippet you posted creates 4 slides, not 2 as one would expect.
Fixing the separator is easy, but I have to investigate the syntax hl issue

[sotte]

@laoshaw just to have a semi working version this would be the regex for the slid separator:

# ftplugin/markdown.vim
let b:presenting_slide_separator_default = '\v(^|\n)\ze#{1,2} '

You should be able to overwrite the separator like this:
https://github.com/sotte/presenting.vim#configuration

[laoshaw]

Thanks. That fixed the header issue. Hope syntax can be highlighted somehow.

A screenshot of one slide is attached, there are two bars not sure if it's be design. plus the two lines for code block, e.g.

```c
```

ideally should not be visible.

[sotte]

The bars are there on purpose, fencing off the code

ideally should not be visible.

That is/should be the case if it works.

[laoshaw]

If code can be highlighted they will stand out visibly enough without the two bars I feel. It would be nice to make the two bars optional as they're a bit heavy visually when I have say two or three small snippets of code on one slide(that will be 6 bars then)

[sotte]

Yeah, design is subjective :) Initially presenting did not do any formatting, it just used the existing hl.

If you want a super lightweight version of presenting you can use an old version which does not use figlet, but does proper syntax hl:

git checkout 9fb8ccc

Then "fix" the slide sep:

au FileType markdown let s:presenting_slide_separator = '\v(^|\n)\ze#+ '

This version would respect your md conceal for your code blocks. I assume you use plasticboy/vim-markdown
https://github.com/plasticboy/vim-markdown#fenced-code-block-languages

[laoshaw]

git checkout 9fb8ccc will give me blank slides with only title shown, the code blocks are totally gone if I use au FileType markdown let s:presenting_slide_separator_default = '\v(^|\n)\ze#+ ', use au FileType markdown let s:presenting_slide_separator = '\v(^|\n)\ze#+ ' it works fine now. Thanks!

[sotte]

Glad it kinda works ™️ should be a smoother experience though! I'll try to fix this soon.

Out of curiosity: do you use the figlet feature? @laoshaw

[laoshaw]

I could not use figlet as I got "error: could not load font small" for all headings on each slide.

fixed it: I did not install figlet, now it works but long headline does not look good with the figlet headers, would love just to use a bold font instead, but I like the list using figlet dots

[laoshaw]

also when using 'figlet' I found for lists only the first level are figlet-ed, the second level of the list are still using whatever is from markdown, be it * or -