1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
use std::rc::Rc;
use std::cell::RefCell;
use super::Element;
use super::ElementContent;
use super::parser::SimpleContent;
use super::parser::EventsHandler;
use super::parser::Event;
#[cfg(test)] mod test;
#[derive(Default)]
pub struct Builder {
ce : Vec<Rc<Element>>,
nb : Option<Box<RefCell<Builder>>>,
cc : Option<ElementContent>,
cid : u64,
in_middle : bool,
}
impl Builder {
pub fn captured_elements(&self) -> &Vec<Rc<Element>> {
&self.ce
}
pub fn into_captured_elements(self) -> Vec<Rc<Element>> {
self.ce
}
pub fn new() -> Self { Default::default() }
}
impl EventsHandler for Builder {
fn event(&mut self, e : Event) {
use super::parser::Event::*;
use super::parser::BinaryChunkStatus::Full;
if let Some(nb) = self.nb.take() {
let terminated = match &e {
&End(_) if !nb.borrow().in_middle => true,
_ => false,
};
if terminated {
self.cc = Some(ElementContent::Master(nb.borrow_mut().ce.clone()));
} else {
nb.borrow_mut().event(e);
self.nb = Some(nb);
return;
}
}
match e {
Begin(x) => {
self.in_middle = true;
self.cid = x.id;
let cl = super::database::id_to_class(x.id);
let typ = super::database::class_to_type(cl);
if typ == super::Type::Master {
assert!(self.nb.is_none());
self.nb = Some ( Box::new( RefCell::new(Default::default()) ) );
};
},
Data(ref x) => {
self.cc = Some(match (*x) {
SimpleContent::Unsigned(x) => ElementContent::Unsigned(x),
SimpleContent::Signed(x) => ElementContent::Signed(x),
SimpleContent::Text(x) => ElementContent::Text(Rc::new(x.to_string())),
SimpleContent::Binary(x,Full) => ElementContent::Binary(Rc::new(x.to_vec())),
SimpleContent::Binary(x,_) => unimplemented!(),
SimpleContent::Float(x) => ElementContent::Float(x),
SimpleContent::MatroskaDate(x) => ElementContent::MatroskaDate(x),
});
},
End(x) => {
let cl = super::database::id_to_class(self.cid);
let elc = self.cc.take().unwrap();
let el = Element {class: cl, content: elc};
self.ce.push(Rc::new(el));
self.in_middle = false;
},
Resync => warn!("Error in matroska file. DOM will be garbled."),
};
}
}