Get the header text/value from the children

[ggrossetie]

Currently, we are using a regular expression to extract the header text from the raw value:

textlint-rule-title-case/index.js

Line 6 in 89e4cd6

const headerRegExp = /^#*\s*(.*?)\s*[=-]*$/;

The issue is that the format # Title is specific to Markdown and won't work when using with an AsciiDoc document.

We can either update the regular expression to use either # or = but I think it would be better to extract the header text from the children no?

node {
  type: 'Header',
  depth: 1,
  children: [
    {
      type: 'Str',
      value: 'Document Title',
      loc: [Object],
      range: [Array],
      raw: 'Document Title'
    }
  ],
  loc: { start: { line: 1, column: 0 }, end: { line: 1, column: 9 } },
  range: [ 0, 9 ],
  raw: '# Document Title'
}

const text = node.children
    .filter(child => child.type === 'Str')
    .map(child => child.value)
    .join(' ')

[sapegin]

That makes sense! Mind sending a pull request for that too? ;-)

[ggrossetie]

As mentioned by @azu we can use textlint-util-to-string:

I always use textlint-util-to-string for extracting text content from TxtParentNode.
It picks each children nodes's value and joins these.
(It aims to pick values that are displayed as rendering result)

opendevise/textlint-plugin-asciidoc#1 (comment)

@sapegin Do you have any preference?