1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 use rustc::middle::cstore::CrateStore;
12 use rustc::middle::privacy::{AccessLevels, AccessLevel};
13 use rustc::hir::def::Def;
14 use rustc::hir::def_id::{CrateNum, CRATE_DEF_INDEX, DefId};
15 use rustc::ty::Visibility;
17 use std::cell::RefMut;
19 use clean::{AttributesExt, NestedAttributesExt};
21 // FIXME: this may not be exhaustive, but is sufficient for rustdocs current uses
23 /// Similar to `librustc_privacy::EmbargoVisitor`, but also takes
24 /// specific rustdoc annotations into account (i.e. `doc(hidden)`)
25 pub struct LibEmbargoVisitor<'a, 'b: 'a, 'tcx: 'b> {
26 cx: &'a ::core::DocContext<'b, 'tcx>,
27 cstore: &'a CrateStore<'tcx>,
28 // Accessibility levels for reachable nodes
29 access_levels: RefMut<'a, AccessLevels<DefId>>,
30 // Previous accessibility level, None means unreachable
31 prev_level: Option<AccessLevel>,
34 impl<'a, 'b, 'tcx> LibEmbargoVisitor<'a, 'b, 'tcx> {
35 pub fn new(cx: &'a ::core::DocContext<'b, 'tcx>) -> LibEmbargoVisitor<'a, 'b, 'tcx> {
38 cstore: &*cx.sess().cstore,
39 access_levels: cx.access_levels.borrow_mut(),
40 prev_level: Some(AccessLevel::Public),
44 pub fn visit_lib(&mut self, cnum: CrateNum) {
45 let did = DefId { krate: cnum, index: CRATE_DEF_INDEX };
46 self.update(did, Some(AccessLevel::Public));
50 // Updates node level and returns the updated level
51 fn update(&mut self, did: DefId, level: Option<AccessLevel>) -> Option<AccessLevel> {
52 let is_hidden = self.cx.tcx.get_attrs(did).lists("doc").has_word("hidden");
54 let old_level = self.access_levels.map.get(&did).cloned();
55 // Accessibility levels can only grow
56 if level > old_level && !is_hidden {
57 self.access_levels.map.insert(did, level.unwrap());
64 pub fn visit_mod(&mut self, def_id: DefId) {
65 for item in self.cstore.item_children(def_id) {
66 self.visit_item(item.def);
70 fn visit_item(&mut self, def: Def) {
71 let def_id = def.def_id();
72 let vis = self.cstore.visibility(def_id);
73 let inherited_item_level = if vis == Visibility::Public {
79 let item_level = self.update(def_id, inherited_item_level);
81 if let Def::Mod(..) = def {
82 let orig_level = self.prev_level;
84 self.prev_level = item_level;
85 self.visit_mod(def_id);
86 self.prev_level = orig_level;