Re: convert markdown to html in new tab

On Fri, Jan 10, 2014 at 7:03 PM, Rick Dooling <rpdooling@gmail.com> wrote:
>
>> > This one grabs the buffer contents, converts it to HTML, and sends it to the clipboard for pasting into WordPress or whatever.
>>
>> > " Send Text Through Filter To Clipboard:
>> > " http://vim.wikia.com/wiki/Use_filter_commands_to_process_text
>> > function! MDC()
>> > :redir @+
>> > " No output file specified so it goes to STDOUT
>> > exe '!pandoc %'
>> > :redir END
>> > endfunction
>>
>> > This morning I was monkeying with using Python in Vim to do this. That also works. Then you can use Python's Markdown module.
>>
>> But does it though? From what I see the line:
>>
>> exe '!pandoc %'
>>
>> Is running pandoc with the *file* open in the current buffer as input,
>> which means you have to have a file and you have to save it in order
>> for it to work. This is similar to what was shown in previous emails,
>> but what I was wondering is whether one can use something similar that
>> uses buffer contents, not file contents.
>>

>
> if no file is specified with -o in pandoc it goes to STDOUT, and you are using redir to redirect STOUT to the clipboard. At least that's how I understand it.
>
> Another scripting angle, esp. using Python or Ruby is just run the commands, save the file, and tell vim to open the file in a new buffer.
>
> Now that I've been playing, the redirect to the clipboard is actually even more useful, because you can use Marked2 or some other html converter/viewer to check things before loading your html up to go paste.
>
> Rick
>

Rick, I think you and I are talking about two different things here. I
am talking about the input and you are talking about the output. So
yes, pandoc sends its output to stdout, which is captured by Vim. But
the input, it takes from a file name, which is the value after
replacing '%' on that exe line.

Say you create a new file, then write some markdown, and, before
saving, you run that function. You'd get nothing, because pandoc
receives, as input, an empty file. Pandoc, and many other programs,
however, support getting their input from stdin. In vim you can send
the contents of the current buffer to a process' stdin, and then the
process' stdout replaces those contents, just like when one does:

:%!sort

What I was trying to ask is. How does one send those unsaved contents
to a program without getting them replaced with the output of such
program, but instead get the output in a separate tab? The function
you sent provides a solution for the second part, since it will
redirect output to a variable or a register. Now we are only missing
the first part, which we nearly have, but it uses files, rather than
buffer contents.

Hope that clarifies my question a little.

Regards,

--
Jacobo de Vera
http://www.jacobodevera.com
@jovianjake

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