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use crate::{
namespaces::ParseNamespace,
parse::Parse,
prolog::subset::{
entity::{
entity_declaration::EntityDecl, entity_definition::EntityDefinition,
entity_value::EntityValue,
},
Subset,
},
Config, IResult, Name,
};
use nom::{
bytes::complete::tag,
combinator::opt,
sequence::{delimited, pair, preceded, tuple},
};
use std::{cell::RefCell, collections::HashMap, rc::Rc};
use super::{
external_id::ExternalID,
subset::{entity::EntitySource, markup_declaration::MarkupDeclaration},
};
#[derive(Clone, PartialEq, Eq)]
pub struct DocType {
pub name: Name,
pub external_id: Option<ExternalID>,
pub subset: Option<Vec<Subset>>,
}
impl<'a> Parse<'a> for DocType {
type Args = (
Rc<RefCell<HashMap<(Name, EntitySource), EntityValue>>>,
&'a Config,
);
type Output = IResult<&'a str, Self>;
fn parse(input: &'a str, args: Self::Args) -> Self::Output {
let (entity_references, config) = args;
let mut merged_subsets = vec![];
let (input, (_open_tag, _whitespace1, name, external_id, _whitespace2)) = tuple((
tag("<!DOCTYPE"),
Self::parse_multispace1,
Self::parse_name,
opt(preceded(Self::parse_multispace1, |i| {
ExternalID::parse(i, ())
})),
Self::parse_multispace0,
))(input)?;
if let Some(external_id) = external_id {
let mut external_subsets = match external_id.get_external_entity_from_id(
input,
entity_references.clone(),
config,
) {
Ok(subsets) => subsets,
Err(_) => None,
};
let (input, (mut subset, _whitespace3, _close_tag, _whitespace4)) =
tuple((
opt(delimited(
pair(tag("["), Self::parse_multispace0),
|i| {
Subset::parse(
i,
(entity_references.clone(), config, EntitySource::External),
)
},
pair(Self::parse_multispace0, tag("]")),
)),
Self::parse_multispace0,
tag(">"),
Self::parse_multispace0,
))(input)?;
if let Some(subset) = &mut subset {
subset.iter_mut().for_each(|subset| match subset {
Subset::MarkupDecl(MarkupDeclaration::Entity(EntityDecl::General(
entity_decl,
)))
| Subset::MarkupDecl(MarkupDeclaration::Entity(EntityDecl::Parameter(
entity_decl,
))) => {
if let EntityDefinition::EntityValue(EntityValue::Reference(ref_val)) =
&mut entity_decl.entity_def
{
ref_val.normalize_entity(entity_references.clone());
}
}
_ => {}
});
merged_subsets.extend(subset.clone());
}
if let Some(subset) = &mut external_subsets {
subset.iter_mut().for_each(|subset| match subset {
Subset::MarkupDecl(MarkupDeclaration::Entity(EntityDecl::General(
entity_decl,
)))
| Subset::MarkupDecl(MarkupDeclaration::Entity(EntityDecl::Parameter(
entity_decl,
))) => {
if let EntityDefinition::EntityValue(EntityValue::Reference(ref_val)) =
&mut entity_decl.entity_def
{
ref_val.normalize_entity(entity_references.clone());
}
}
_ => {}
});
merged_subsets.extend(subset.clone());
}
// we need to create a subsets that merges external subsets with subset
if merged_subsets.is_empty() {
Ok((
input,
Self {
name,
external_id: Some(external_id),
subset: None,
},
))
} else {
Ok((
input,
Self {
name,
external_id: Some(external_id),
subset: Some(merged_subsets),
},
))
}
} else {
let (input, (mut subset, _whitespace3, _close_tag, _whitespace4)) =
tuple((
opt(delimited(
pair(tag("["), Self::parse_multispace0),
|i| {
Subset::parse(
i,
(entity_references.clone(), config, EntitySource::Internal),
)
},
pair(Self::parse_multispace0, tag("]")),
)),
Self::parse_multispace0,
tag(">"),
Self::parse_multispace0,
))(input)?;
if let Some(subset) = &mut subset {
subset.iter_mut().for_each(|subset| {
match subset {
//match internal_subset {
Subset::MarkupDecl(MarkupDeclaration::Entity(EntityDecl::General(
entity_decl,
)))
| Subset::MarkupDecl(MarkupDeclaration::Entity(EntityDecl::Parameter(
entity_decl,
))) => {
if let EntityDefinition::EntityValue(EntityValue::Reference(ref_val)) =
&mut entity_decl.entity_def
{
ref_val.normalize_entity(entity_references.clone());
}
}
_ => {}
}
});
}
Ok((
input,
Self {
name,
external_id,
subset,
},
))
}
}
}
//TODO integrate this
impl DocType {
pub fn extract_entities(&self) -> Option<Vec<Box<Subset>>> {
let entities: Vec<_> = self
.subset
.as_ref()?
.iter()
.filter_map(|item| {
if let Subset::MarkupDecl(MarkupDeclaration::Entity(_)) = item {
Some(Box::new(item.clone()))
} else {
None
}
})
.collect();
if entities.is_empty() {
None
} else {
Some(entities)
}
}
//TODO: figure out how to integrate this or remove
// fn _parse_qualified_doctype(
// input: &str,
// entity_references: Rc<RefCell<HashMap<(Name,EntityType), EntityValue>>>,
// ) -> IResult<&str, DocType> {
// let (input, _) = tag("<!DOCTYPE")(input)?;
// let (input, _) = Self::parse_multispace1(input)?;
// let (input, name) = Self::parse_qualified_name(input)?;
// let (input, external_id) = opt(preceded(Self::parse_multispace1, |i| {
// ExternalID::parse(i, ())
// }))(input)?;
// let (input, _) = Self::parse_multispace0(input)?;
// let (input, int_subset) = opt(delimited(
// pair(tag("["), Self::parse_multispace0),
// |i| InternalSubset::parse(i, entity_references.clone()),
// pair(Self::parse_multispace0, tag("]")),
// ))(input)?;
// let (input, _) = Self::parse_multispace0(input)?;
// let (input, _) = tag(">")(input)?;
// let (input, _) = Self::parse_multispace0(input)?;
// Ok((
// input,
// Self {
// name,
// external_id,
// int_subset,
// },
// ))
// }
}
impl<'a> ParseNamespace<'a> for DocType {}