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Move inline stylesheet parsing out of HTML parser.

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Instead, use shared code to parse stylesheet content when it is inserted,
whether during parsing or dynamically by script.

Based on work by sanools in #1350.
This commit is contained in:
Matt Brubeck 2014-03-26 10:15:29 -07:00
parent ce877e4f5b
commit 8c794c6739
8 changed files with 83 additions and 46 deletions
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55
src/components/script/html/cssparse.rs
View file

@ -18,34 +18,45 @@ pub enum StylesheetProvenance {
InlineProvenance(Url, ~str),
}
// Parses the style data and returns the stylesheet
pub fn parse_inline_css(url: Url, data: ~str) -> Stylesheet {
let resource_task = ResourceTask(); // Resource task is not used for inline parsing
parse_css(InlineProvenance(url, data), resource_task)
}
fn parse_css(provenance: StylesheetProvenance,
resource_task: ResourceTask) -> Stylesheet {
// TODO: Get the actual value. http://dev.w3.org/csswg/css-syntax/#environment-encoding
let environment_encoding = UTF_8 as EncodingRef;
match provenance {
UrlProvenance(url) => {
debug!("cssparse: loading style sheet at {:s}", url.to_str());
let (input_chan, input_port) = channel();
resource_task.send(Load(url, input_chan));
let LoadResponse { metadata: metadata, progress_port: progress_port }
= input_port.recv();
let final_url = &metadata.final_url;
let protocol_encoding_label = metadata.charset.as_ref().map(|s| s.as_slice());
let iter = ProgressMsgPortIterator { progress_port: progress_port };
Stylesheet::from_bytes_iter(
iter, final_url.clone(),
protocol_encoding_label, Some(environment_encoding))
}
InlineProvenance(base_url, data) => {
debug!("cssparse: loading inline stylesheet {:s}", data);
Stylesheet::from_str(data, base_url, environment_encoding)
}
}
}
pub fn spawn_css_parser(provenance: StylesheetProvenance,
resource_task: ResourceTask)
-> Receiver<Stylesheet> {
let (result_chan, result_port) = channel();
// TODO: Get the actual value. http://dev.w3.org/csswg/css-syntax/#environment-encoding
let environment_encoding = UTF_8 as EncodingRef;
spawn_named("cssparser", proc() {
let sheet = match provenance {
UrlProvenance(url) => {
debug!("cssparse: loading style sheet at {:s}", url.to_str());
let (input_chan, input_port) = channel();
resource_task.send(Load(url, input_chan));
let LoadResponse { metadata: metadata, progress_port: progress_port }
= input_port.recv();
let final_url = &metadata.final_url;
let protocol_encoding_label = metadata.charset.as_ref().map(|s| s.as_slice());
let iter = ProgressMsgPortIterator { progress_port: progress_port };
Stylesheet::from_bytes_iter(
iter, final_url.clone(),
protocol_encoding_label, Some(environment_encoding))
}
InlineProvenance(base_url, data) => {
Stylesheet::from_str(data, base_url, environment_encoding)
}
};
result_chan.send(sheet);
result_chan.send(parse_css(provenance, resource_task));
});
return result_port;