I'm afraid I'm not used to mailing-lists, especially when using the digest version. I've posted my response without the subject, so I copy it again here.
I'm sending also the patch, this time it's the full version with the tagmanager/txt2tags.c file correctly included.
>I'm just wondering whether it isn't possible to extend the Markdown
>parser to parse txt2tags files as well.
it's problably possible because the txt2tags tags don't interfere with the markdown for this part. But...
>This way we wouldn't need to
>add yet another filetype in Geany.
yet the extension for txt2tags files is different. And in case I or someone manage to write the scintilla lexer, the rest of the txt2tags syntax would interfere with the markdown one.
>Your patch doesn't list any changes to Scintilla code,
I didn't include it, maybe I could have done it (without the scintilla lexer)? I'm still not satisfied with my scintilla lexer, because I managed only to highlight the tags and not the text. I'll propose it in a later revision.
Besides, the first time I inserted my changes, I did it on the released version 0.18, so I had to do it again with the svn version later.