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use crate::buffer_queue::BufferQueue;
use crate::tokenizer::{Tokenizer, TokenizerOpts, TokenizerResult};
use crate::tree_builder::{create_element, TreeBuilder, TreeBuilderOpts, TreeSink};
use crate::{Attribute, QualName};
use std::borrow::Cow;
use crate::tendril;
use crate::tendril::stream::{TendrilSink, Utf8LossyDecoder};
use crate::tendril::StrTendril;
#[derive(Clone, Default)]
pub struct ParseOpts {
pub tokenizer: TokenizerOpts,
pub tree_builder: TreeBuilderOpts,
}
pub fn parse_document<Sink>(sink: Sink, opts: ParseOpts) -> Parser<Sink>
where
Sink: TreeSink,
{
let tb = TreeBuilder::new(sink, opts.tree_builder);
let tok = Tokenizer::new(tb, opts.tokenizer);
Parser {
tokenizer: tok,
input_buffer: BufferQueue::new(),
}
}
pub fn parse_fragment<Sink>(
mut sink: Sink,
opts: ParseOpts,
context_name: QualName,
context_attrs: Vec<Attribute>,
) -> Parser<Sink>
where
Sink: TreeSink,
{
let context_elem = create_element(&mut sink, context_name, context_attrs);
parse_fragment_for_element(sink, opts, context_elem, None)
}
pub fn parse_fragment_for_element<Sink>(
sink: Sink,
opts: ParseOpts,
context_element: Sink::Handle,
form_element: Option<Sink::Handle>,
) -> Parser<Sink>
where
Sink: TreeSink,
{
let tb = TreeBuilder::new_for_fragment(sink, context_element, form_element, opts.tree_builder);
let tok_opts = TokenizerOpts {
initial_state: Some(tb.tokenizer_state_for_context_elem()),
..opts.tokenizer
};
let tok = Tokenizer::new(tb, tok_opts);
Parser {
tokenizer: tok,
input_buffer: BufferQueue::new(),
}
}
pub struct Parser<Sink>
where
Sink: TreeSink,
{
pub tokenizer: Tokenizer<TreeBuilder<Sink::Handle, Sink>>,
pub input_buffer: BufferQueue,
}
impl<Sink: TreeSink> TendrilSink<tendril::fmt::UTF8> for Parser<Sink> {
fn process(&mut self, t: StrTendril) {
self.input_buffer.push_back(t);
while let TokenizerResult::Script(_) = self.tokenizer.feed(&mut self.input_buffer) {}
}
fn error(&mut self, desc: Cow<'static, str>) {
self.tokenizer.sink.sink.parse_error(desc)
}
type Output = Sink::Output;
fn finish(mut self) -> Self::Output {
while let TokenizerResult::Script(_) = self.tokenizer.feed(&mut self.input_buffer) {}
assert!(self.input_buffer.is_empty());
self.tokenizer.end();
self.tokenizer.sink.sink.finish()
}
}
impl<Sink: TreeSink> Parser<Sink> {
#[allow(clippy::wrong_self_convention)]
pub fn from_utf8(self) -> Utf8LossyDecoder<Self> {
Utf8LossyDecoder::new(self)
}
}