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/*!
* Divides the document tree into pages.
*
* Each page corresponds is a logical section. There may be pages for
* individual modules, pages for the crate, indexes, etc.
*/
import doc::{item_utils, page_utils};
import syntax::ast;
export mk_pass;
fn mk_pass(output_style: config::output_style) -> pass {
{
name: ~"page",
f: fn~(srv: astsrv::srv, doc: doc::doc) -> doc::doc {
run(srv, doc, output_style)
}
}
}
fn run(
_srv: astsrv::srv,
doc: doc::doc,
output_style: config::output_style
) -> doc::doc {
if output_style == config::doc_per_crate {
return doc;
}
let result_port = comm::port();
let result_chan = comm::chan(result_port);
let page_chan = do task::spawn_listener |page_port| {
comm::send(result_chan, make_doc_from_pages(page_port));
};
find_pages(doc, page_chan);
comm::recv(result_port)
}
type page_port = comm::port<option<doc::page>>;
type page_chan = comm::chan<option<doc::page>>;
fn make_doc_from_pages(page_port: page_port) -> doc::doc {
let mut pages = ~[];
loop {
let val = comm::recv(page_port);
if option::is_some(val) {
pages += ~[option::unwrap(val)];
} else {
break;
}
}
doc::doc_({
pages: pages
})
}
fn find_pages(doc: doc::doc, page_chan: page_chan) {
let fold = fold::fold({
fold_crate: fold_crate,
fold_mod: fold_mod,
fold_nmod: fold_nmod
with *fold::default_any_fold(page_chan)
});
fold.fold_doc(fold, doc);
comm::send(page_chan, none);
}
fn fold_crate(
fold: fold::fold<page_chan>,
doc: doc::cratedoc
) -> doc::cratedoc {
let doc = fold::default_seq_fold_crate(fold, doc);
let page = doc::cratepage({
topmod: strip_mod(doc.topmod)
with doc
});
comm::send(fold.ctxt, some(page));
doc
}
fn fold_mod(
fold: fold::fold<page_chan>,
doc: doc::moddoc
) -> doc::moddoc {
let doc = fold::default_any_fold_mod(fold, doc);
if doc.id() != ast::crate_node_id {
let doc = strip_mod(doc);
let page = doc::itempage(doc::modtag(doc));
comm::send(fold.ctxt, some(page));
}
doc
}
fn strip_mod(doc: doc::moddoc) -> doc::moddoc {
doc::moddoc_({
items: do vec::filter(doc.items) |item| {
alt item {
doc::modtag(_) { false }
doc::nmodtag(_) { false }
_ { true }
}
}
with *doc
})
}
fn fold_nmod(
fold: fold::fold<page_chan>,
doc: doc::nmoddoc
) -> doc::nmoddoc {
let doc = fold::default_seq_fold_nmod(fold, doc);
let page = doc::itempage(doc::nmodtag(doc));
comm::send(fold.ctxt, some(page));
return doc;
}
#[test]
fn should_not_split_the_doc_into_pages_for_doc_per_crate() {
let doc = test::mk_doc_(
config::doc_per_crate,
~"mod a { } mod b { mod c { } }"
);
assert doc.pages.len() == 1u;
}
#[test]
fn should_make_a_page_for_every_mod() {
let doc = test::mk_doc(~"mod a { }");
assert doc.pages.mods()[0].name() == ~"a";
}
#[test]
fn should_remove_mods_from_containing_mods() {
let doc = test::mk_doc(~"mod a { }");
assert vec::is_empty(doc.cratemod().mods());
}
#[test]
fn should_make_a_page_for_every_foreign_mod() {
let doc = test::mk_doc(~"extern mod a { }");
assert doc.pages.nmods()[0].name() == ~"a";
}
#[test]
fn should_remove_foreign_mods_from_containing_mods() {
let doc = test::mk_doc(~"extern mod a { }");
assert vec::is_empty(doc.cratemod().nmods());
}
#[cfg(test)]
mod test {
fn mk_doc_(
output_style: config::output_style,
source: ~str
) -> doc::doc {
do astsrv::from_str(source) |srv| {
let doc = extract::from_srv(srv, ~"");
run(srv, doc, output_style)
}
}
fn mk_doc(source: ~str) -> doc::doc {
mk_doc_(config::doc_per_mod, source)
}
}
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