summaryrefslogtreecommitdiff
path: root/support/texlab/src/db/diagnostics/tex.rs
blob: a7b030a5bf0577dcd89a4e8fd60c6120bb2decbb (plain)
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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
use lsp_types::DiagnosticSeverity;
use rowan::{ast::AstNode, NodeOrToken, TextRange};

use crate::{db::document::Document, syntax::latex, util::line_index_ext::LineIndexExt, Db};

use super::{Diagnostic, DiagnosticCode, TexCode};

#[salsa::tracked]
pub fn collect(db: &dyn Db, document: Document) -> Vec<Diagnostic> {
    let mut results = Vec::new();

    if !document.location(db).uri(db).as_str().ends_with(".tex") {
        return results;
    }

    let data = match document.parse(db).as_tex() {
        Some(data) => data,
        None => return results,
    };

    let mut traversal = data.root(db).preorder();
    while let Some(event) = traversal.next() {
        match event {
            rowan::WalkEvent::Enter(node) => {
                if let Some(environment) = latex::Environment::cast(node.clone()) {
                    if environment
                        .begin()
                        .and_then(|begin| begin.name())
                        .and_then(|name| name.key())
                        .map_or(false, |name| {
                            db.config()
                                .syntax
                                .verbatim_environments
                                .contains(&name.to_string())
                        })
                    {
                        traversal.skip_subtree();
                        continue;
                    }
                }

                analyze_environment(db, document, node.clone(), &mut results)
                    .or_else(|| analyze_curly_group(db, document, node.clone(), &mut results))
                    .or_else(|| analyze_curly_braces(document, db, node, &mut results));
            }
            rowan::WalkEvent::Leave(_) => {
                continue;
            }
        };
    }

    results
}

fn analyze_environment(
    db: &dyn Db,
    document: Document,
    node: latex::SyntaxNode,
    results: &mut Vec<Diagnostic>,
) -> Option<()> {
    let environment = latex::Environment::cast(node)?;
    let name1 = environment.begin()?.name()?.key()?;
    let name2 = environment.end()?.name()?.key()?;
    if name1 != name2 {
        let code = TexCode::MismatchedEnvironment;
        results.push(Diagnostic {
            severity: DiagnosticSeverity::ERROR,
            range: document
                .line_index(db)
                .line_col_lsp_range(latex::small_range(&name1)),
            code: DiagnosticCode::Tex(code),
            message: String::from(code),
        });
    }

    Some(())
}

fn analyze_curly_group(
    db: &dyn Db,
    document: Document,
    node: latex::SyntaxNode,
    results: &mut Vec<Diagnostic>,
) -> Option<()> {
    if !matches!(
        node.kind(),
        latex::CURLY_GROUP
            | latex::CURLY_GROUP_COMMAND
            | latex::CURLY_GROUP_KEY_VALUE
            | latex::CURLY_GROUP_WORD
            | latex::CURLY_GROUP_WORD_LIST
    ) {
        return None;
    }

    let is_inside_verbatim_environment = node
        .ancestors()
        .filter_map(latex::Environment::cast)
        .filter_map(|env| env.begin())
        .filter_map(|begin| begin.name())
        .filter_map(|name| name.key())
        .any(|name| {
            ["asy", "lstlisting", "minted", "verbatim"].contains(&name.to_string().as_str())
        });

    if !is_inside_verbatim_environment
        && !node
            .children_with_tokens()
            .filter_map(NodeOrToken::into_token)
            .any(|token| token.kind() == latex::R_CURLY)
    {
        let code = TexCode::RCurlyInserted;
        results.push(Diagnostic {
            severity: DiagnosticSeverity::ERROR,
            range: document
                .line_index(db)
                .line_col_lsp_range(TextRange::empty(node.text_range().end())),
            code: DiagnosticCode::Tex(code),
            message: String::from(code),
        });
    }

    Some(())
}

fn analyze_curly_braces(
    document: Document,
    db: &dyn Db,
    node: rowan::SyntaxNode<latex::LatexLanguage>,
    results: &mut Vec<Diagnostic>,
) -> Option<()> {
    if node.kind() == latex::ERROR && node.first_token()?.text() == "}" {
        let code = TexCode::UnexpectedRCurly;
        results.push(Diagnostic {
            severity: DiagnosticSeverity::ERROR,
            range: document
                .line_index(db)
                .line_col_lsp_range(node.text_range()),
            code: DiagnosticCode::Tex(code),
            message: String::from(code),
        });

        Some(())
    } else {
        None
    }
}