config: change default config to use toml-based configuration

toml-config/src/config/parsers/status.rs

@@ -0,0 +1,81 @@
+use {
+    crate::{
+        config::{
+            context::Context,
+            extractor::{opt, recover, str, val, Extractor, ExtractorError},
+            parser::{DataType, ParseResult, Parser, UnexpectedDataType},
+            parsers::exec::{ExecParser, ExecParserError},
+            Status,
+        },
+        toml::{
+            toml_span::{Span, Spanned, SpannedExt},
+            toml_value::Value,
+        },
+    },
+    indexmap::IndexMap,
+    jay_config::status::MessageFormat,
+    thiserror::Error,
+};
+
+#[derive(Debug, Error)]
+pub enum StatusParserError {
+    #[error(transparent)]
+    Expected(#[from] UnexpectedDataType),
+    #[error(transparent)]
+    Exec(#[from] ExecParserError),
+    #[error(transparent)]
+    Extract(#[from] ExtractorError),
+    #[error("Expected `plain`, `pango`, or `i3bar` but found {0}")]
+    UnknownFormat(String),
+}
+
+pub struct StatusParser<'a>(pub &'a Context<'a>);
+
+impl Parser for StatusParser<'_> {
+    type Value = Status;
+    type Error = StatusParserError;
+    const EXPECTED: &'static [DataType] = &[DataType::Table];
+
+    fn parse_table(
+        &mut self,
+        span: Span,
+        table: &IndexMap<Spanned<String>, Spanned<Value>>,
+    ) -> ParseResult<Self> {
+        let mut ext = Extractor::new(self.0, span, table);
+        let (format, exec, separator) = ext.extract((
+            opt(str("format")),
+            val("exec"),
+            recover(opt(str("i3bar-separator"))),
+        ))?;
+        let format = match format {
+            Some(f) => match f.value {
+                "plain" => MessageFormat::Plain,
+                "pango" => MessageFormat::Pango,
+                "i3bar" => MessageFormat::I3Bar,
+                _ => {
+                    return Err(
+                        StatusParserError::UnknownFormat(f.value.to_string()).spanned(f.span)
+                    )
+                }
+            },
+            _ => MessageFormat::Plain,
+        };
+        let exec = exec.parse_map(&mut ExecParser(self.0))?;
+        let separator = match separator {
+            None => None,
+            Some(sep) if format == MessageFormat::I3Bar => Some(sep.value.to_string()),
+            Some(sep) => {
+                log::warn!(
+                    "Separator has no effect for format {format:?}: {}",
+                    self.0.error3(sep.span)
+                );
+                None
+            }
+        };
+        Ok(Status {
+            format,
+            exec,
+            separator,
+        })
+    }
+}