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use crate::util::escape;
use super::{
node::{ArrayKind, DomNode, IntegerRepr, IntegerValue, TableKind},
Keys, Node,
};
use std::fmt::{Formatter, Write};
impl Node {
pub fn to_toml(&self, inline: bool, prefer_single_quote: bool) -> String {
let mut s = String::new();
self.to_toml_fmt(&mut s, inline, prefer_single_quote)
.unwrap();
s
}
pub fn to_toml_fmt(
&self,
f: &mut impl Write,
inline: bool,
prefer_single_quote: bool,
) -> core::fmt::Result {
self.to_toml_impl(f, Keys::empty(), inline, false, prefer_single_quote)
}
fn to_toml_impl(
&self,
f: &mut impl Write,
parent_keys: Keys,
inline: bool,
no_header: bool,
prefer_single_quote: bool,
) -> core::fmt::Result {
if let Node::Bool(_) | Node::Str(_) | Node::Integer(_) | Node::Float(_) | Node::Date(_) =
self
{
if !parent_keys.is_empty() {
f.write_str(parent_keys.dotted())?;
f.write_str(" = ")?;
}
// Use the original representation of primitives if available.
if let Some(syntax) = self.syntax() {
return write!(f, "{}", syntax);
}
}
match self {
Node::Table(table) => {
if table.inner.kind == TableKind::Inline || inline {
if !parent_keys.is_empty() {
f.write_str(parent_keys.dotted())?;
f.write_str(" = ")?;
}
f.write_str("{ ")?;
let entries = table.entries().read();
let mut first = true;
for (key, node) in entries.iter() {
if !first {
f.write_str(", ")?;
}
node.to_toml_impl(f, key.clone().into(), true, false, prefer_single_quote)?;
first = false;
}
f.write_str(" }")?;
} else {
if !parent_keys.is_empty() && !no_header {
f.write_str("[")?;
f.write_str(parent_keys.dotted())?;
f.write_str("]\n")?;
}
let entries = table.entries().read();
// We make two runs to put tables and array of tables last.
// No tables:
for (key, node) in entries.iter().filter(|(_, n)| {
!n.is_table()
&& !n
.as_array()
.map(|n| n.inner.kind == ArrayKind::Tables)
.unwrap_or(false)
}) {
node.to_toml_impl(
f,
key.clone().into(),
false,
false,
prefer_single_quote,
)?;
f.write_char('\n')?;
}
// Tables only:
for (key, node) in entries.iter().filter(|(_, n)| {
n.is_table()
|| n.as_array()
.map(|n| n.inner.kind == ArrayKind::Tables)
.unwrap_or(false)
}) {
node.to_toml_impl(
f,
parent_keys.join(key.clone()),
false,
false,
prefer_single_quote,
)?;
}
}
}
Node::Array(array) => {
if array.inner.kind == ArrayKind::Inline || inline {
if !parent_keys.is_empty() {
f.write_str(parent_keys.dotted())?;
f.write_str(" = ")?;
}
f.write_str("[ ")?;
let items = array.items().read();
let mut first = true;
for node in items.iter() {
if !first {
f.write_str(", ")?;
}
node.to_toml_impl(f, Keys::empty(), true, false, prefer_single_quote)?;
first = false;
}
f.write_str(" ]")?;
} else {
let items = array.items().read();
for node in items.iter() {
f.write_str("[[")?;
f.write_str(parent_keys.dotted())?;
f.write_str("]]\n")?;
node.to_toml_impl(
f,
parent_keys.clone(),
false,
true,
prefer_single_quote,
)?;
}
}
}
Node::Bool(b) => write!(f, "{}", b.value())?,
Node::Str(s) => {
if let Some(syntax) = s.syntax() {
write!(f, "{}", syntax)?;
} else {
let escaped = escape(s.value());
if prefer_single_quote && escaped == s.value() {
write!(f, "'{}'", s.value())?;
} else {
write!(f, r#""{escaped}""#)?;
}
}
}
Node::Integer(i) => match i.inner.repr {
IntegerRepr::Dec => match i.value() {
IntegerValue::Negative(i) => write!(f, "{i}")?,
IntegerValue::Positive(i) => write!(f, "{i}")?,
},
IntegerRepr::Bin => write!(f, "{:#b}", i.value().as_positive().unwrap())?,
IntegerRepr::Oct => write!(f, "{:#o}", i.value().as_positive().unwrap())?,
IntegerRepr::Hex => write!(f, "{:#X}", i.value().as_positive().unwrap())?,
},
Node::Float(float) => {
write!(f, "{}", float.value())?;
}
Node::Date(d) => write!(f, "{}", d.value())?,
Node::Invalid(_) => {}
}
Ok(())
}
}
impl core::fmt::Display for Node {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
self.to_toml_impl(f, Keys::empty(), false, false, false)
}
}