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Nested blocks in blockprocessor extension

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nurkkala

Nested blocks in blockprocessor extension

Within a block processor, is it possible to create a block from scratch? For example, while processing an open block, could I arrange to output another block that either wraps the open block (becomes its parent), or one that precedes it in the output (becomes its previous sibling)?

mojavelinux

Re: Nested blocks in blockprocessor extension

Administrator

That's exactly what block processors are designed to do. They can insert any set of nodes into to the AST (the document model).

Here's an example:

wrapper = create_open_block parent, [], {}

wrapper << (create_open_block wrapper, reader.lines, attrs)

wrapper

(You have to decide where you want the attributes to go, but that's the general idea

Here's the APIs to be looking at:

* http://www.rubydoc.info/gems/asciidoctor/Asciidoctor/Extensions/Processor#create_block-instance_method

* http://www.rubydoc.info/gems/asciidoctor/Asciidoctor/Block#initialize-instance_method

Note that `create_open_block` is just a shorthand for `create_block parent, :open, ...`

-Dan

On Fri, Jan 29, 2016 at 9:07 AM, nurkkala [via Asciidoctor :: Discussion] <[hidden email]> wrote:

Within a block processor, is it possible to create a block from scratch? For example, while processing an open block, could I arrange to output another block that either wraps the open block (becomes its parent), or one that precedes it in the output (becomes its previous sibling)?

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Dan Allen | @mojavelinux | http://google.com/profiles/dan.j.allen

nurkkala

Re: Nested blocks in blockprocessor extension

Got it. I had missed the use of the append operation to insert the "sub-block" in the newly built one. Actually occurred to me after I went to bed and stopped thinking about the problem. :-)