gitbook-plugin-uml does not work

[azu]

Summary

https://github.com/vowstar/gitbook-plugin-uml does not work on Honkit

• HonKit version: 3.3.10

Step to reproduce

• Link to code example: https://github.com/azu/honkit-example-gitbook-plugin-uml

Expected results

Render the uml correctly.

Actual results

Rendering error.

Note

https://github.com/vowstar/gitbook-plugin-uml/blob/99ad7443d2a2c051c2327c7ebda63a0ca19f1621/index.js#L41
Dump the code variable and I noticed the differnece between GitBook and HonKit

GitBook

@startuml

    Class Stage
    Class Timeout {
        +constructor:function(cfg)
        +timeout:function(ctx)
        +overdue:function(ctx)
        +stage: Stage
    }
    Stage <|-- Timeout

@enduml

HonKit

@startuml

```
Class Stage
Class Timeout {
    +constructor:function(cfg)
    +timeout:function(ctx)
    +overdue:function(ctx)
    +stage: Stage
}
Stage <|-- Timeout
```

@enduml

[azu]

Maybe related https://github.com/honkit/honkit/tree/master/packages/%40honkit/markdown

[azu]

https://github.com/vowstar/gitbook-plugin-uml/blob/99ad7443d2a2c051c2327c7ebda63a0ca19f1621/index.js#L138-L203
convert to

{% uml %}
@startuml

	Class Stage
	Class Timeout {
		+constructor:function(cfg)
		+timeout:function(ctx)
		+overdue:function(ctx)
		+stage: Stage
	}
 	Stage <|-- Timeout

@enduml
{% enduml %}

[azu]

honkit/packages/honkit/src/output/generatePage.js

Line 46 in 025344d

return parser.preparePage(currentPage.getContent());

convert indent to backtick(codeblock)

[azu]

I figure out it.
#58 (comment)

The plugin CodeBlock to Block Tags.

and then,

honkit/packages/@honkit/markdown/src/page.ts

Lines 25 to 59 in bb5149f

	function preparePage(src) {
	let levelRaw = 0;
	const content = markdown.toContent(src, {
	math: true,
	template: true,
	});
	const textMarkdown = markdown.toText(content, {
	annotate: function (state, raw, token) {
	const tokenType = token.getType();
	if (tokenType === MarkupIt.ENTITIES.TEMPLATE) {
	const type = token.getData().get("type");
	const expr = token.getAsPlainText();
	if (type === "expr") {
	if (expr === "raw") {
	levelRaw = levelRaw + 1;
	} else if (expr == "endraw") {
	levelRaw = 0;
	}
	}
	}
	if ((tokenType === MarkupIt.BLOCKS.CODE || tokenType === MarkupIt.STYLES.CODE) && levelRaw === 0) {
	return escape(raw);
	}
	return raw;
	},
	});
	return textMarkdown;
	}

convert \t to CodeBlock.

[azu]

https://github.com/GitbookIO/gitbook-markdown/blob/master/package.json
GitBook use 1.3.2. But HonKit use 2.x

[azu]

#60 will fix this issue.

But, still exist edge case like following.
< should be parse error. We not have solution for the edge case.

{% uml %}
@startuml

	Class Stage
	Class Timeout {
		+constructor:function(cfg)
		+timeout:function(ctx)
		+overdue:function(ctx)
		+stage: Stage
	}
 	Stage <|-- Timeout

@enduml
{% enduml %}