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use crate::item::{Node, NodeType};
use crate::parser::combinators::alt::{alt2, alt4};
use crate::parser::combinators::many::many0nsreset;
use crate::parser::combinators::map::map;
use crate::parser::combinators::opt::opt;
use crate::parser::combinators::tag::tag;
use crate::parser::combinators::tuple::{tuple2, tuple5, tuple10};
use crate::parser::combinators::wellformed::wellformed;
use crate::parser::combinators::whitespace::whitespace0;
use crate::parser::common::is_ncnamechar;
use crate::parser::xml::attribute::attributes;
use crate::parser::xml::chardata::chardata;
use crate::parser::xml::misc::{comment, processing_instruction};
use crate::parser::xml::qname::qualname_to_parts;
use crate::parser::xml::reference::reference;
use crate::parser::{ParseError, ParseInput, StaticState};
use crate::value::{ID, IDREF, Value, ValueBuilder, ValueData};
use crate::xmldecl::{AttType, DefaultDecl};
use qualname::{NamespacePrefix, NamespaceUri, NcName, QName};
use std::rc::Rc;
use std::sync::LazyLock;
// static QNames
static XMLID: LazyLock<QName> = LazyLock::new(|| {
QName::new_from_parts(
NcName::try_from("id").unwrap(),
Some(NamespaceUri::try_from("http://www.w3.org/XML/1998/namespace").unwrap()),
)
});
// Element ::= EmptyElemTag | STag content ETag
pub(crate) fn element<'a, N: Node, L>()
-> impl Fn(ParseInput<'a, N>, &mut StaticState<L>) -> Result<(ParseInput<'a, N>, N), ParseError>
where
L: FnMut(&NamespacePrefix) -> Result<NamespaceUri, ParseError>,
{
move |input, ss| {
match alt2(
//Empty element
map(
tuple5(
tag("<"),
qualname_to_parts(),
attributes(), //many0(attribute),
whitespace0(),
tag("/>"),
),
|(_, n, (at, ns), _, _)| ((), n.clone(), (at, ns), (), (), vec![], (), n, (), ()),
),
//tagged element
wellformed(
tuple10(
tag("<"),
qualname_to_parts(),
attributes(), //many0(attribute),
whitespace0(),
tag(">"),
content(),
tag("</"),
qualname_to_parts(),
whitespace0(),
tag(">"),
),
|(_, n, _a, _, _, _c, _, e, _, _)| n == e,
"mismatched start and end tags",
),
)(input, ss)
{
Err(err) => Err(err),
Ok((
(input1, state1),
(_, (prefix, local_part), (av, namespaces), _, _, c, _, _, _, _),
)) => {
// Need to resolve element name to create element node,
// then we can add namespace declarations.
// Processing the attribute list updates the in-scope namespaces in the state
let elementname = if let Some(p) = prefix.clone() {
// This is a prefixed name, so the prefix must resolve to a URI
// NB. Creating the prefix cannot fail, since it has already been parsed
if let Some(u) = state1
.in_scope_namespaces
.namespace_uri(&Some(NamespacePrefix::try_from(p.as_str()).unwrap()))
{
QName::new_from_parts(
NcName::try_from(local_part.as_str()).unwrap(), // creating NcName cannot fail, since we have already parsed it
Some(u),
)
} else {
return Err(ParseError::MissingNameSpace);
}
} else {
// This is either an unprefixed name or a name in the default namespace, if one has been defined
if let Some(u) = state1.in_scope_namespaces.namespace_uri(&None) {
let lp = NcName::try_from(local_part.as_str()).unwrap();
QName::new_from_parts(
lp, // creating NcName cannot fail, since we have already parsed it
Some(u),
)
} else {
QName::from_local_name(NcName::try_from(local_part.as_str()).unwrap())
}
};
/* SRB: is this possible?
if state1.xmlversion == "1.1"
&& elementname.namespace_uri().to_string() == Some("".to_string())
&& elementname.prefix().to_string().is_some()
{
return Err(ParseError::MissingNameSpace);
}*/
let d = state1.doc.clone().unwrap();
let mut e = d
.new_element(elementname.clone())
.expect("unable to create element");
// Looking up the DTD, seeing if there are any attributes we should populate
// Remember, DTDs don't have namespaces, you need to lookup based on prefix and local name!
// We generate the attributes in two sweeps:
// Once for attributes declared on the element and once for the DTD default attribute values.
let attlist = state1
.dtd
.attlists
.get(&(prefix.clone(), local_part.clone()));
match attlist {
None => {
// No Attribute DTD, just insert all attributes.
av.into_iter().try_for_each(|a| {
e.add_attribute(a).map_err(|_| {
ParseError::NotWellFormed(String::from("unable to add attribute"))
})
})?
/*for (attname, attval) in av.into_iter() {
//Ordinarily, you'll just treat attributes as CDATA and not normalize, however we need to check xml:id
let avalue: String;
let a: N;
if attname.prefix_to_string() == Some("xml".to_string())
&& attname.localname_to_string() == "id"
{
av = attval.trim().replace(" ", " ");
if let Ok(avr) = ID::try_from(av) {
a = d
.new_attribute(Rc::new(attname), Rc::new(Value::from(avr)))
.expect("unable to create attribute");
} else {
return Err(ParseError::IDError("not an ID".to_string()));
}
} else {
av = attval;
a = d
.new_attribute(Rc::new(attname), state1.get_value(&av))
.expect("unable to create attribute");
};
e.add_attribute(a).expect("unable to add attribute")
}*/
}
Some(atts) => {
// Keep track of attributes that are created as defaults
let mut created_attrs = vec![];
for attnode in av.into_iter() {
if attnode.name().unwrap() == *XMLID {
let a = d
.new_attribute(attnode.name().unwrap(), attnode.value())
.expect("unable to create xml:id attribute");
if e.add_attribute(a).is_err() {
return Err(ParseError::DuplicateAttribute(
attnode.name().unwrap().to_string(),
));
}
created_attrs.push(attnode.name().clone());
} else {
let thisatprefix =
attnode.name().unwrap().namespace_uri().and_then(|ns| {
state1
.in_scope_namespaces
.prefix(&ns)
.map(|p| p.to_string())
});
let thisatlocalpart =
attnode.name().unwrap().local_name().to_string();
match atts.get(&(thisatprefix, thisatlocalpart)) {
// No DTD found, we just create the value
None => {
// TODO: this is duplicate code to the @xml:id case above.
// Consolidate this with the above code.
let a = d
.new_attribute(attnode.name().unwrap(), attnode.value())
.expect("unable to create attribute");
if e.add_attribute(a).is_err() {
return Err(ParseError::DuplicateAttribute(
attnode.name().unwrap().to_string(),
));
}
created_attrs.push(attnode.name().clone());
}
Some((atttype, _, _)) => {
//https://www.w3.org/TR/xml11/#AVNormalize
let av = match atttype {
AttType::CDATA => attnode.value().to_string(),
_ => attnode
.value()
.to_string()
.trim()
.replace(" ", " "), // see attribute.rs for better attr value normalisation
};
// Assign IDs only if we are tracking.
let v = match (atttype, state1.id_tracking) {
(AttType::ID, true) => Rc::new(Value::from(
ID::try_from(av.clone())
.map_err(|_| ParseError::MissingNameSpace)?,
)),
(AttType::IDREF, true) => Rc::new(Value::from(
IDREF::try_from(av.clone())
.map_err(|_| ParseError::MissingNameSpace)?,
)),
(AttType::IDREFS, true) => Rc::new(
ValueBuilder::new()
.value(ValueData::IDREFS(
av.clone().split(' ').try_fold(
vec![],
|mut acc, s| {
acc.push(
IDREF::try_from(s.to_string())
.map_err(|_| {
ParseError::MissingNameSpace
})?,
);
Ok(acc)
},
)?,
))
.build(),
),
(_, _) => Rc::new(Value::from(av.clone())),
};
if atttype == &AttType::NMTOKENS && av.is_empty() {
return Err(ParseError::NotWellFormed(
"NMTOKENs must not be empty".to_string(),
));
} else if atttype == &AttType::NMTOKENS {
let names = av.split(' ');
for name in names {
let ch = name.chars();
for cha in ch {
if !(is_ncnamechar(&cha) || cha == ':') {
return Err(ParseError::NotWellFormed(
String::from("Invalid NMTOKEN"),
));
}
}
}
}
let a = d
.new_attribute(attnode.name().unwrap(), v)
.expect("unable to create attribute");
if e.add_attribute(a).is_err() {
return Err(ParseError::DuplicateAttribute(
attnode.name().unwrap().to_string(),
));
}
created_attrs.push(attnode.name().clone());
}
}
}
}
if state1.attr_defaults {
for ((attprefix, attlocalname), (atttype, defdecl, _)) in atts.iter() {
match defdecl {
DefaultDecl::Default(s) | DefaultDecl::FIXED(s) => {
let qn = attprefix.as_ref().map_or_else(
|| {
QName::from_local_name(
NcName::try_from(attlocalname.as_str())
.unwrap(),
)
},
|ap| {
QName::new_from_parts(
NcName::try_from(attlocalname.as_str())
.unwrap(),
state1.in_scope_namespaces.namespace_uri(
&Some(
NamespacePrefix::try_from(ap.as_str())
.unwrap(),
),
), // TODO: return error if no namespace found
)
},
);
//https://www.w3.org/TR/xml11/#AVNormalize
if !created_attrs.iter().any(|aqn| *aqn == Some(qn.clone()))
{
let attval = match atttype {
AttType::CDATA => s.clone(),
_ => s.trim().replace(" ", " "),
};
let a = d
.new_attribute(
qn.clone(),
Rc::new(Value::from(attval)),
)
.expect("unable to create attribute");
if e.add_attribute(a).is_err() {
return Err(ParseError::DuplicateAttribute(
qn.to_string(),
));
}
}
}
_ => {}
}
}
}
}
}
//we've added the IDs and IDRefs, but we need to track all that.
if state1.id_tracking {
for attribute in e.attribute_iter() {
if attribute.is_id() {
match ss.ids_read.insert(attribute.to_string()) {
true => {}
false => {
//Value already existed!
return Err(ParseError::IDError(String::from(
"Duplicate ID found",
)));
}
}
}
if attribute.is_idrefs() {
/*
If the IDRef matches a previously loaded ID, we're all good. If not, that ID
may exist further along, we'll make a note of it to check when we
have completely parsed the document.
*/
if attribute.value().to_string().split_whitespace().count() == 0 {
return Err(ParseError::IDError(
"IDREFs cannot be empty".to_string(),
));
} else {
for idref in attribute.value().to_string().split_whitespace() {
match ss.ids_read.get(idref) {
Some(_) => {}
None => {
ss.ids_pending.insert(idref.to_string());
}
}
}
}
}
}
}
namespaces
.iter()
.for_each(|b| e.add_namespace(b.clone()).expect("unable to add namespace"));
// Add child nodes
c.iter().for_each(|d| {
e.push(d.clone()).expect("unable to add node");
});
Ok(((input1, state1.clone()), e))
}
}
}
}
// content ::= CharData? ((element | Reference | CDSect | PI | Comment) CharData?)*
pub(crate) fn content<'a, N: Node, L>()
-> impl Fn(ParseInput<'a, N>, &mut StaticState<L>) -> Result<(ParseInput<'a, N>, Vec<N>), ParseError>
where
L: FnMut(&NamespacePrefix) -> Result<NamespaceUri, ParseError>,
{
move |(input, state), ss| match tuple2(
opt(chardata()),
many0nsreset(tuple2(
alt4(
map(processing_instruction(), |e| vec![e]),
map(comment(), |e| vec![e]),
map(element(), |e| vec![e]),
reference(),
),
opt(chardata()),
)),
)((input, state.clone()), ss)
{
Ok((state1, (c, v))) => {
let mut new: Vec<N> = Vec::new();
let mut notex: Vec<String> = Vec::new();
if let Some(s) = c {
notex.push(s)
}
if !v.is_empty() {
for (w, d) in v {
for x in w {
match x.node_type() {
NodeType::Text => notex.push(x.to_string()),
_ => {
if !notex.is_empty() {
new.push(
state
.doc
.clone()
.unwrap()
.new_text(Rc::new(Value::from(notex.concat())))
.expect("unable to create text node"),
);
notex.clear();
}
new.push(x);
}
}
}
if let Some(s) = d {
notex.push(s)
}
}
}
if !notex.is_empty() {
new.push(
state
.doc
.clone()
.unwrap()
.new_text(Rc::new(Value::from(notex.concat())))
.expect("unable to create text node"),
);
}
Ok((state1, new))
}
Err(e) => Err(e),
}
}