Support coloring with multiline span

[apstndb]

AFAIU, readline.Highlight is applied as per-line basis.

go-multiline-ny/main.go

Lines 399 to 403 in bb1bd51

	colSeq := highlightToColoring(
	m.lines[i],
	m.LineEditor.ResetColor,
	m.LineEditor.DefaultColor,
	m.LineEditor.Highlight)

But, there is a syntax like multiline comments and multiline literals.(This examples uses ```...``` as multiline string literal, and /* ... */ as multiline comment)

• FindAllStringIndex() method only receives a single line, so multiline pattern won't be matched.
• Some times, coloring will be broken.

Of course, I know using multi-line patterns in readline is a rare case and difficult to implement, but ideally I'd be happy if go-multiline-ny supported it.

[hymkor]

Thank you for trying the new feature so quickly.

But, there is a syntax like multiline comments and multiline literals

I understand your concern. However, it is difficult to implement it right away, because there are some technical challenges, and I currently have no clear ideas on how to solve them.

Therefore, I will treat it as a long-term task. I hope you don't mind waiting for a while.

[apstndb]

Thank you for replying!

It is sufficient that it has been filed as an open issue, so it is fine if it takes a long time to resolve as it is a long term issue.

[hymkor]

In Release v0.19.0 · hymkor/go-multiline-ny, multi-line syntax highlighting to allow color changes across line boundaries is supported.

This feature is enabled with updating update the code to assign values to the fields as shown below

• var ed multiline
• ed.LineEditor.Highlight = ... to ed.Highlight = ...
• ed.LineEditor.ResetColor = ... to ed.ResetColor = ...
• ed.LineEditor.DefaultColor = ... to ed.DefaultColor = ...

(*Editor).Read creates new instances by wrapping those in ed.Highlight with its internal class and sets them into ed.LineEditor.Highlight.

Since it is difficult to handle regions enclosed by """ and " simultaneously using regular expressions alone, I am using ```instead of """. I believe this issue can be resolved in your client (spanner-mycli) since it uses a customized type instead of regular expressions.

The source file of the example is https://github.com/hymkor/go-multiline-ny/blob/fa092b68055ea896fee0bf81768a148ac760b8f2/examples/example.go

[apstndb]

Thank you for fast fixing!
I tried the update and it seems to work fine!