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use common::is_name_start_char;
use attribute::OwnedAttribute;
use namespace;
use reader::lexer::Token;
use super::{Result, PullParser, State, OpeningTagSubstate, QualifiedNameTarget};
impl PullParser {
pub fn inside_opening_tag(&mut self, t: Token, s: OpeningTagSubstate) -> Option<Result> {
macro_rules! unexpected_token(($t:expr) => (Some(self_error!(self; "Unexpected token inside opening tag: {}", $t))));
match s {
OpeningTagSubstate::InsideName => self.read_qualified_name(t, QualifiedNameTarget::OpeningTagNameTarget, |this, token, name| {
match name.prefix_ref() {
Some(prefix) if prefix == namespace::NS_XML_PREFIX ||
prefix == namespace::NS_XMLNS_PREFIX =>
Some(self_error!(this; "'{:?}' cannot be an element name prefix", name.prefix)),
_ => {
this.data.element_name = Some(name.clone());
match token {
Token::TagEnd => this.emit_start_element(false),
Token::EmptyTagEnd => this.emit_start_element(true),
Token::Whitespace(_) => this.into_state_continue(State::InsideOpeningTag(OpeningTagSubstate::InsideTag)),
_ => unreachable!()
}
}
}
}),
OpeningTagSubstate::InsideTag => match t {
Token::Whitespace(_) => None, // skip whitespace
Token::Character(c) if is_name_start_char(c) => {
self.buf.push(c);
self.into_state_continue(State::InsideOpeningTag(OpeningTagSubstate::InsideAttributeName))
}
Token::TagEnd => self.emit_start_element(false),
Token::EmptyTagEnd => self.emit_start_element(true),
_ => unexpected_token!(t)
},
OpeningTagSubstate::InsideAttributeName => self.read_qualified_name(t, QualifiedNameTarget::AttributeNameTarget, |this, token, name| {
this.data.attr_name = Some(name);
match token {
Token::Whitespace(_) => this.into_state_continue(State::InsideOpeningTag(OpeningTagSubstate::AfterAttributeName)),
Token::EqualsSign => this.into_state_continue(State::InsideOpeningTag(OpeningTagSubstate::InsideAttributeValue)),
_ => unreachable!()
}
}),
OpeningTagSubstate::AfterAttributeName => match t {
Token::Whitespace(_) => None,
Token::EqualsSign => self.into_state_continue(State::InsideOpeningTag(OpeningTagSubstate::InsideAttributeValue)),
_ => unexpected_token!(t)
},
OpeningTagSubstate::InsideAttributeValue => self.read_attribute_value(t, |this, value| {
let name = this.data.take_attr_name().unwrap(); // unwrap() will always succeed here
// check that no attribute with such name is already present
// if there is one, XML is not well-formed
if this.data.attributes.iter().find(|a| a.name == name).is_some() { // TODO: looks bad
// TODO: ideally this error should point to the beginning of the attribute,
// TODO: not the end of its value
Some(self_error!(this; "Attribute '{}' is redefined", name))
} else {
match name.prefix_ref() {
// declaring a new prefix; it is sufficient to check prefix only
// because "xmlns" prefix is reserved
Some(namespace::NS_XMLNS_PREFIX) => {
let ln = &name.local_name[..];
if ln == namespace::NS_XMLNS_PREFIX {
Some(self_error!(this; "Cannot redefine prefix '{}'", namespace::NS_XMLNS_PREFIX))
} else if ln == namespace::NS_XML_PREFIX && &value[..] != namespace::NS_XML_URI {
Some(self_error!(this; "Prefix '{}' cannot be rebound to another value", namespace::NS_XML_PREFIX))
} else if value.is_empty() {
Some(self_error!(this; "Cannot undefine prefix '{}'", ln))
} else {
this.nst.put(name.local_name.clone(), value);
this.into_state_continue(State::InsideOpeningTag(OpeningTagSubstate::InsideTag))
}
}
// declaring default namespace
None if &name.local_name[..] == namespace::NS_XMLNS_PREFIX =>
match &value[..] {
namespace::NS_XMLNS_PREFIX | namespace::NS_XML_PREFIX =>
Some(self_error!(this; "Namespace '{}' cannot be default", value)),
_ => {
this.nst.put(namespace::NS_NO_PREFIX, value.clone());
this.into_state_continue(State::InsideOpeningTag(OpeningTagSubstate::InsideTag))
}
},
// regular attribute
_ => {
this.data.attributes.push(OwnedAttribute {
name: name.clone(),
value: value
});
this.into_state_continue(State::InsideOpeningTag(OpeningTagSubstate::InsideTag))
}
}
}
})
}
}
}
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