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use item::TreeItem; use style::Style; use std::io; use std::borrow::Cow; use serde_value::Value; fn value_to_string(v: &Value) -> String { match v { Value::Bool(b) => b.to_string(), Value::U8(u) => u.to_string(), Value::U16(u) => u.to_string(), Value::U32(u) => u.to_string(), Value::U64(u) => u.to_string(), Value::I8(i) => i.to_string(), Value::I16(i) => i.to_string(), Value::I32(i) => i.to_string(), Value::I64(i) => i.to_string(), Value::F32(f) => f.to_string(), Value::F64(f) => f.to_string(), Value::Char(c) => c.to_string(), Value::String(s) => s.clone(), Value::Option(Some(b)) => value_to_string(&*b), Value::Newtype(b) => value_to_string(&*b), _ => "".to_string(), } } impl TreeItem for Value { type Child = (String, Value); fn write_self<W: io::Write>(&self, f: &mut W, style: &Style) -> io::Result<()> { write!(f, "{}", style.paint(value_to_string(self))) } fn children(&self) -> Cow<[Self::Child]> { match self { Value::Seq(v) => Cow::from( v.iter() .map(|v| ("".to_string(), v.clone())) .collect::<Vec<_>>(), ), Value::Map(m) => { let v: Vec<_> = m.iter() .map(|(k, v)| match v { Value::Seq(_) => (value_to_string(k), v.clone()), Value::Map(_) => (value_to_string(k), v.clone()), _ => ( "".to_string(), Value::String(format!("{} = {}", value_to_string(k), value_to_string(v))), ), }) .collect(); Cow::from(v) } _ => Cow::from(vec![]), } } } impl TreeItem for (String, Value) { type Child = Self; fn write_self<W: io::Write>(&self, f: &mut W, style: &Style) -> io::Result<()> { if self.0.is_empty() { write!(f, "{}", style.paint(value_to_string(&self.1))) } else { write!(f, "{}", style.paint(&self.0)) } } fn children(&self) -> Cow<[Self::Child]> { match &self.1 { Value::Seq(v) => Cow::from( v.iter() .map(|v| ("".to_string(), v.clone())) .collect::<Vec<_>>(), ), Value::Map(m) => { let v: Vec<_> = m.iter() .map(|(k, v)| match v { Value::Seq(_) => (value_to_string(k), v.clone()), Value::Map(_) => (value_to_string(k), v.clone()), _ => ( "".to_string(), Value::String(format!("{} = {}", value_to_string(k), value_to_string(v))), ), }) .collect(); Cow::from(v) } _ => Cow::from(vec![]), } } } #[cfg(test)] mod tests { use std::io::Cursor; use std::str::from_utf8; use super::*; use output::write_tree_with; use print_config::PrintConfig; use serde_any; #[test] fn toml_value_output() { let toml = "\ configuration = [\"toml\", \"yaml\", \"json\", \"environment\"]\n\ charactersets = [\"utf\", \"ascii\"]\n\ \n\ default_depth = 3\n\ \n\ "; let value: Value = serde_any::from_str(toml, serde_any::Format::Toml).unwrap(); let tree = ("toml".to_string(), value); let config = PrintConfig { indent: 4, leaf: Style::default(), branch: Style::default(), ..PrintConfig::default() }; let mut cursor: Cursor<Vec<u8>> = Cursor::new(Vec::new()); write_tree_with(&tree, &mut cursor, &config).unwrap(); let data = cursor.into_inner(); let expected = "\ toml\n\ ├── charactersets\n\ │ ├── utf\n\ │ └── ascii\n\ ├── configuration\n\ │ ├── toml\n\ │ ├── yaml\n\ │ ├── json\n\ │ └── environment\n\ └── default_depth = 3\n\ "; assert_eq!(from_utf8(&data).unwrap(), expected); } }