Support references in included files for codelens + diagnostics.

[angelozerr]

Search references inincluded files for codelens + diagnostics.

Signed-off-by: azerr azerr@redhat.com

[angelozerr]

Given this XML file:

<docbook>
	<xref linkend="s1" />
	<section id="s1" />
	<xref linkend="ch1" />
	<xi:include href="sub-book.xml" />
</docbook>

with sub-book.xml file:

<book>
	<chapter id="ch1" />
	<chapter id="ch2"/>
	<xref linkend="s1" />
	<xref linkend="s1" />
	<xref linkend="ch1" />
	<xref linkend="ch1" />
</book>

and an expression like this:

{
  "pattern": "**/*.xml",
  "expressions": [
    {
      "from": "xref/@linkend",
      "to": "@id"
    }
  ]
}

• the included xref in sub-book.xml is not used to count codelens: <section id="s1" /> should show [3 references]
• the diagnostic report ch1 as an error although it is defined in the sub-book.xml

[datho7561]

I think that it would be nice to disable this when "xml.validation.xInclude.enabled": false,

[datho7561]

I get a FileNotFoundException when the referenced xi:include/@href doesn't exist

[angelozerr]

I think that it would be nice to disable this when "xml.validation.xInclude.enabled": false,

I would like to avoid doing that, because my idea is to remove all XSD, RNG support and delegate references with XML references. For XSD, xsd:include is not linked to xiinclude.

For the moment the include is hard coded, but my idea is to give the capability to customize it when you write an xm reference expression like:

{
  "pattern": "**/*.xml",
  "include": [
      "include/@href",
      "import/@href"
   ],
  "expressions": [
    {
      "from": "xref/@linkend",
      "to": "@id"
    }
  ]
}

[angelozerr]

I get a FileNotFoundException when the referenced xi:include/@href doesn't exist

I removed the log

[datho7561]

Looks good. Thanks, Angelo!