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
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/// Some little helpers for hooking up the HTML parser with the CSS parser.
use std::cell::Cell;
use std::comm;
use std::comm::Port;
use std::task;
use style::Stylesheet;
use servo_net::resource_task::{Load, ProgressMsg, Payload, Done, ResourceTask};
use extra::url::Url;
/// Where a style sheet comes from.
pub enum StylesheetProvenance {
UrlProvenance(Url),
InlineProvenance(Url, ~str),
}
pub fn spawn_css_parser(provenance: StylesheetProvenance,
resource_task: ResourceTask)
-> Port<Stylesheet> {
let (result_port, result_chan) = comm::stream();
let provenance_cell = Cell::new(provenance);
do task::spawn {
// TODO: CSS parsing should take a base URL.
let _url = do provenance_cell.with_ref |p| {
match *p {
UrlProvenance(ref the_url) => (*the_url).clone(),
InlineProvenance(ref the_url, _) => (*the_url).clone()
}
};
let sheet = match provenance_cell.take() {
UrlProvenance(url) => {
debug!("cssparse: loading style sheet at {:s}", url.to_str());
let (input_port, input_chan) = comm::stream();
resource_task.send(Load(url, input_chan));
Stylesheet::from_iter(ProgressMsgPortIterator {
progress_port: input_port.recv().progress_port
})
}
InlineProvenance(_, data) => {
Stylesheet::from_str(data)
}
};
result_chan.send(sheet);
}
return result_port;
}
struct ProgressMsgPortIterator {
progress_port: Port<ProgressMsg>
}
impl Iterator<~[u8]> for ProgressMsgPortIterator {
fn next(&mut self) -> Option<~[u8]> {
match self.progress_port.recv() {
Payload(data) => Some(data),
Done(*) => None
}
}
}
|
