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-rw-r--r--crates/ide/src/syntax_highlighting.rs8
-rw-r--r--crates/ide/src/syntax_highlighting/inject.rs (renamed from crates/ide/src/syntax_highlighting/injection.rs)130
2 files changed, 52 insertions, 86 deletions
diff --git a/crates/ide/src/syntax_highlighting.rs b/crates/ide/src/syntax_highlighting.rs
index ad456bc00..079248511 100644
--- a/crates/ide/src/syntax_highlighting.rs
+++ b/crates/ide/src/syntax_highlighting.rs
@@ -4,7 +4,7 @@ mod highlights;
4mod injector; 4mod injector;
5 5
6mod format; 6mod format;
7mod injection; 7mod inject;
8mod macro_rules; 8mod macro_rules;
9 9
10mod html; 10mod html;
@@ -135,9 +135,7 @@ pub(crate) fn highlight(
135 if ast::Attr::can_cast(node.kind()) { 135 if ast::Attr::can_cast(node.kind()) {
136 inside_attribute = false 136 inside_attribute = false
137 } 137 }
138 if let Some((new_comments, inj)) = injection::extract_doc_comments(node) { 138 inject::doc_comment(&mut hl, node);
139 injection::highlight_doc_comment(new_comments, inj, &mut hl);
140 }
141 } 139 }
142 WalkEvent::Enter(NodeOrToken::Node(node)) if ast::Attr::can_cast(node.kind()) => { 140 WalkEvent::Enter(NodeOrToken::Node(node)) if ast::Attr::can_cast(node.kind()) => {
143 inside_attribute = true 141 inside_attribute = true
@@ -181,7 +179,7 @@ pub(crate) fn highlight(
181 if let Some(token) = element.as_token().cloned().and_then(ast::String::cast) { 179 if let Some(token) = element.as_token().cloned().and_then(ast::String::cast) {
182 if token.is_raw() { 180 if token.is_raw() {
183 let expanded = element_to_highlight.as_token().unwrap().clone(); 181 let expanded = element_to_highlight.as_token().unwrap().clone();
184 if injection::highlight_injection(&mut hl, &sema, token, expanded).is_some() { 182 if inject::ra_fixture(&mut hl, &sema, token, expanded).is_some() {
185 continue; 183 continue;
186 } 184 }
187 } 185 }
diff --git a/crates/ide/src/syntax_highlighting/injection.rs b/crates/ide/src/syntax_highlighting/inject.rs
index 008d5ce24..4647a72c2 100644
--- a/crates/ide/src/syntax_highlighting/injection.rs
+++ b/crates/ide/src/syntax_highlighting/inject.rs
@@ -1,17 +1,14 @@
1//! Syntax highlighting injections such as highlighting of documentation tests. 1//! Syntax highlighting injections such as highlighting of documentation tests.
2 2
3use std::convert::TryFrom;
4
5use hir::Semantics; 3use hir::Semantics;
6use ide_db::call_info::ActiveParameter; 4use ide_db::call_info::ActiveParameter;
7use itertools::Itertools;
8use syntax::{ast, AstToken, SyntaxNode, SyntaxToken, TextRange, TextSize}; 5use syntax::{ast, AstToken, SyntaxNode, SyntaxToken, TextRange, TextSize};
9 6
10use crate::{Analysis, HlMod, HlRange, HlTag, RootDatabase}; 7use crate::{Analysis, HlMod, HlRange, HlTag, RootDatabase};
11 8
12use super::{highlights::Highlights, injector::Injector}; 9use super::{highlights::Highlights, injector::Injector};
13 10
14pub(super) fn highlight_injection( 11pub(super) fn ra_fixture(
15 hl: &mut Highlights, 12 hl: &mut Highlights,
16 sema: &Semantics<RootDatabase>, 13 sema: &Semantics<RootDatabase>,
17 literal: ast::String, 14 literal: ast::String,
@@ -84,107 +81,78 @@ const RUSTDOC_FENCE_TOKENS: &[&'static str] = &[
84 "edition2021", 81 "edition2021",
85]; 82];
86 83
87/// Extracts Rust code from documentation comments as well as a mapping from 84/// Injection of syntax highlighting of doctests.
88/// the extracted source code back to the original source ranges. 85pub(super) fn doc_comment(hl: &mut Highlights, node: &SyntaxNode) {
89/// Lastly, a vector of new comment highlight ranges (spanning only the 86 let doc_comments = node
90/// comment prefix) is returned which is used in the syntax highlighting 87 .children_with_tokens()
91/// injection to replace the previous (line-spanning) comment ranges. 88 .filter_map(|it| it.into_token().and_then(ast::Comment::cast))
92pub(super) fn extract_doc_comments(node: &SyntaxNode) -> Option<(Vec<HlRange>, Injector)> { 89 .filter(|it| it.kind().doc.is_some());
90
91 if !doc_comments.clone().any(|it| it.text().contains(RUSTDOC_FENCE)) {
92 return;
93 }
94
93 let mut inj = Injector::default(); 95 let mut inj = Injector::default();
94 // wrap the doctest into function body to get correct syntax highlighting 96 inj.add_unmapped("fn doctest() {\n");
95 let prefix = "fn doctest() {\n";
96 let suffix = "}\n";
97 97
98 let mut line_start = TextSize::of(prefix);
99 let mut is_codeblock = false; 98 let mut is_codeblock = false;
100 let mut is_doctest = false; 99 let mut is_doctest = false;
100
101 // Replace the original, line-spanning comment ranges by new, only comment-prefix 101 // Replace the original, line-spanning comment ranges by new, only comment-prefix
102 // spanning comment ranges. 102 // spanning comment ranges.
103 let mut new_comments = Vec::new(); 103 let mut new_comments = Vec::new();
104 104 for comment in doc_comments {
105 inj.add_unmapped(prefix); 105 match comment.text().find(RUSTDOC_FENCE) {
106 let doctest = node 106 Some(idx) => {
107 .children_with_tokens()
108 .filter_map(|el| el.into_token().and_then(ast::Comment::cast))
109 .filter(|comment| comment.kind().doc.is_some())
110 .filter(|comment| {
111 if let Some(idx) = comment.text().find(RUSTDOC_FENCE) {
112 is_codeblock = !is_codeblock; 107 is_codeblock = !is_codeblock;
113 // Check whether code is rust by inspecting fence guards 108 // Check whether code is rust by inspecting fence guards
114 let guards = &comment.text()[idx + RUSTDOC_FENCE.len()..]; 109 let guards = &comment.text()[idx + RUSTDOC_FENCE.len()..];
115 let is_rust = 110 let is_rust =
116 guards.split(',').all(|sub| RUSTDOC_FENCE_TOKENS.contains(&sub.trim())); 111 guards.split(',').all(|sub| RUSTDOC_FENCE_TOKENS.contains(&sub.trim()));
117 is_doctest = is_codeblock && is_rust; 112 is_doctest = is_codeblock && is_rust;
118 false 113 continue;
119 } else {
120 is_doctest
121 } 114 }
122 }) 115 None if !is_doctest => continue,
123 .map(|comment| { 116 None => (),
124 let prefix_len = comment.prefix().len(); 117 }
125 let line: &str = comment.text().as_str();
126 let range = comment.syntax().text_range();
127
128 // whitespace after comment is ignored
129 let pos = if let Some(ws) = line.chars().nth(prefix_len).filter(|c| c.is_whitespace()) {
130 prefix_len + ws.len_utf8()
131 } else {
132 prefix_len
133 };
134
135 // lines marked with `#` should be ignored in output, we skip the `#` char
136 let pos = if let Some(ws) = line.chars().nth(pos).filter(|&c| c == '#') {
137 pos + ws.len_utf8()
138 } else {
139 pos
140 };
141
142 new_comments.push(HlRange {
143 range: TextRange::new(
144 range.start(),
145 range.start() + TextSize::try_from(pos).unwrap(),
146 ),
147 highlight: HlTag::Comment | HlMod::Documentation,
148 binding_hash: None,
149 });
150 line_start += range.len() - TextSize::try_from(pos).unwrap();
151 line_start += TextSize::of("\n");
152
153 inj.add(
154 &line[pos..],
155 TextRange::new(range.start() + TextSize::try_from(pos).unwrap(), range.end()),
156 );
157 inj.add_unmapped("\n");
158 line[pos..].to_owned()
159 })
160 .join("\n");
161 inj.add_unmapped(suffix);
162
163 if doctest.is_empty() {
164 return None;
165 }
166 118
167 Some((new_comments, inj)) 119 let line: &str = comment.text().as_str();
168} 120 let range = comment.syntax().text_range();
169 121
170/// Injection of syntax highlighting of doctests. 122 let mut pos = TextSize::of(comment.prefix());
171pub(super) fn highlight_doc_comment( 123 // whitespace after comment is ignored
172 new_comments: Vec<HlRange>, 124 if let Some(ws) = line[pos.into()..].chars().next().filter(|c| c.is_whitespace()) {
173 inj: Injector, 125 pos += TextSize::of(ws);
174 stack: &mut Highlights, 126 }
175) { 127 // lines marked with `#` should be ignored in output, we skip the `#` char
176 let (analysis, tmp_file_id) = Analysis::from_single_file(inj.text().to_string()); 128 if let Some(ws) = line[pos.into()..].chars().next().filter(|&c| c == '#') {
177 for comment in new_comments { 129 pos += TextSize::of(ws);
178 stack.add(comment); 130 }
131
132 new_comments.push(TextRange::at(range.start(), pos));
133
134 inj.add(&line[pos.into()..], TextRange::new(range.start() + pos, range.end()));
135 inj.add_unmapped("\n");
179 } 136 }
137 inj.add_unmapped("\n}");
138
139 let (analysis, tmp_file_id) = Analysis::from_single_file(inj.text().to_string());
180 140
181 for h in analysis.with_db(|db| super::highlight(db, tmp_file_id, None, true)).unwrap() { 141 for h in analysis.with_db(|db| super::highlight(db, tmp_file_id, None, true)).unwrap() {
182 for r in inj.map_range_up(h.range) { 142 for r in inj.map_range_up(h.range) {
183 stack.add(HlRange { 143 hl.add(HlRange {
184 range: r, 144 range: r,
185 highlight: h.highlight | HlMod::Injected, 145 highlight: h.highlight | HlMod::Injected,
186 binding_hash: h.binding_hash, 146 binding_hash: h.binding_hash,
187 }); 147 });
188 } 148 }
189 } 149 }
150
151 for range in new_comments {
152 hl.add(HlRange {
153 range,
154 highlight: HlTag::Comment | HlMod::Documentation,
155 binding_hash: None,
156 });
157 }
190} 158}