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use super::ast::*;
use crate::syntax::language::*;
use crate::syntax::text::SyntaxNode;
use lsp_types::Range;
use std::sync::Arc;
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct LatexEnvironmentDelimiter {
pub command: Arc<LatexCommand>,
}
impl LatexEnvironmentDelimiter {
pub fn name(&self) -> Option<&LatexToken> {
self.command.extract_word(0)
}
pub fn is_math(&self) -> bool {
if let Some(name) = self.name() {
LANGUAGE_DATA
.math_environments
.iter()
.any(|env| env == name.text())
} else {
false
}
}
pub fn is_enum(&self) -> bool {
if let Some(name) = self.name() {
LANGUAGE_DATA
.enum_environments
.iter()
.any(|env| env == name.text())
} else {
false
}
}
}
impl SyntaxNode for LatexEnvironmentDelimiter {
fn range(&self) -> Range {
self.command.range()
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct LatexEnvironment {
pub left: LatexEnvironmentDelimiter,
pub right: LatexEnvironmentDelimiter,
}
impl LatexEnvironment {
pub fn is_root(&self) -> bool {
self.left
.name()
.iter()
.chain(self.right.name().iter())
.any(|name| name.text() == "document")
}
fn parse(commands: &[Arc<LatexCommand>]) -> Vec<Self> {
let mut stack = Vec::new();
let mut environments = Vec::new();
for command in commands {
if let Some(delimiter) = Self::parse_delimiter(command) {
if delimiter.command.name.text() == "\\begin" {
stack.push(delimiter);
} else if let Some(begin) = stack.pop() {
environments.push(Self {
left: begin,
right: delimiter,
});
}
}
}
environments
}
fn parse_delimiter(command: &Arc<LatexCommand>) -> Option<LatexEnvironmentDelimiter> {
if command.name.text() != "\\begin" && command.name.text() != "\\end" {
return None;
}
if command.args.is_empty() {
return None;
}
if command.has_word(0)
|| command.args[0].children.is_empty()
|| command.args[0].right.is_none()
{
let delimiter = LatexEnvironmentDelimiter {
command: Arc::clone(&command),
};
Some(delimiter)
} else {
None
}
}
}
impl SyntaxNode for LatexEnvironment {
fn range(&self) -> Range {
Range::new(self.left.start(), self.right.end())
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct LatexEnvironmentInfo {
pub environments: Vec<LatexEnvironment>,
pub is_standalone: bool,
}
impl LatexEnvironmentInfo {
pub fn parse(commands: &[Arc<LatexCommand>]) -> Self {
let environments = LatexEnvironment::parse(commands);
let is_standalone = environments.iter().any(LatexEnvironment::is_root);
Self {
environments,
is_standalone,
}
}
}
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