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use super::{is_function_name, Value};
use crate::output::Formatted;
use crate::value::{ListSeparator, Operator};
use std::fmt::{self, Display, Write};
impl<'a> Display for Formatted<'a, Value> {
fn fmt(&self, out: &mut fmt::Formatter) -> fmt::Result {
match *self.value {
Value::Bang(ref s) => write!(out, "!{}", s),
Value::Literal(ref s) => s.fmt(out),
Value::Function(ref n, ref _f) => {
let name = n
.chars()
.flat_map(|c| match c {
'"' => vec!['\\', '"'],
c => vec![c],
})
.collect::<String>();
write!(out, "get-function(\"{}\")", name)
}
Value::Numeric(ref num, _) => num.format(self.format).fmt(out),
Value::Color(ref rgba, ref name) => {
if let Some(ref name) = *name {
name.fmt(out)
} else {
rgba.format(self.format).fmt(out)
}
}
Value::List(ref v, sep, brackets) => {
let sep = sep.unwrap_or_default();
let introspect = self.format.is_introspection();
if brackets {
out.write_str("[")?;
} else if introspect && v.is_empty() {
return out.write_str("()");
}
let t = v
.iter()
.filter(|v| !v.is_null() || introspect)
.map(|v| {
let needs_paren = match *v {
Value::List(ref v, inner, false) => {
((brackets
&& (sep < inner.unwrap_or_default()))
|| introspect
&& (sep <= inner.unwrap_or_default()))
&& !(introspect && v.len() < 2)
&& (introspect || v.len() != 1)
}
_ => false,
};
if needs_paren {
format!("({})", v.format(self.format))
} else {
format!("{}", v.format(self.format))
}
})
.collect::<Vec<_>>();
if let Some((first, rest)) = t.split_first() {
if rest.is_empty()
&& introspect
&& sep > ListSeparator::Space
{
if !brackets {
write!(out, "({}{})", first, sep.sep(true))?;
} else {
write!(out, "{}{}", first, sep.sep(true))?;
}
} else {
write!(out, "{}", first)?;
let sep = sep.sep(self.format.is_compressed());
for i in rest {
write!(out, "{}{}", sep, i)?;
}
}
}
if brackets {
out.write_str("]")?;
}
Ok(())
}
Value::Call(ref name, ref arg) => {
write!(out, "{}({})", name, arg)
}
Value::BinOp(ref a, _, Operator::Plus, _, ref b)
if add_as_join(a) || add_as_join(b) =>
{
// The plus operator is also a concat operator
a.format(self.format).fmt(out)?;
b.format(self.format).fmt(out)
}
Value::BinOp(ref a, ref s1, ref op, ref s2, ref b) => {
use Operator::{Minus, Plus};
let (op, b) = match (op, b.as_ref()) {
(Plus, Value::Numeric(v, _)) if v.value.is_negative() => {
(Minus, Value::from(-v))
}
(Minus, Value::Numeric(v, _))
if v.value.is_negative() =>
{
(Plus, Value::from(-v))
}
(op, Value::Paren(p)) => {
if let Some(op2) = is_op(p.as_ref()) {
if op2 > *op {
(op.clone(), *p.clone())
} else {
(op.clone(), *b.clone())
}
} else {
(op.clone(), *b.clone())
}
}
(op, Value::BinOp(_, _, op2, _, _))
if (op2 < op) || (*op == Minus && *op2 == Minus) =>
{
(op.clone(), Value::Paren(b.clone()))
}
(op, v) => (op.clone(), v.clone()),
};
fn is_op(v: &Value) -> Option<Operator> {
match v {
Value::BinOp(_, _, op, _, _) => Some(op.clone()),
_ => None,
}
}
a.format(self.format).fmt(out)?;
if *s1 {
out.write_char(' ')?;
}
op.fmt(out)?;
if *s2 {
out.write_char(' ')?;
}
b.format(self.format).fmt(out)
}
Value::UnaryOp(ref op, ref v) => {
op.fmt(out)?;
if *op == Operator::Not {
out.write_char(' ')?;
}
v.format(self.format).fmt(out)
}
Value::True => write!(out, "true"),
Value::False => write!(out, "false"),
Value::Null => {
if self.format.is_introspection() {
out.write_str("null")
} else {
Ok(())
}
}
Value::Map(ref map) => {
out.write_char('(')?;
for (i, (k, v)) in map.iter().enumerate() {
if i > 0 {
out.write_str(", ")?;
}
if matches!(
k,
Value::List(_, Some(ListSeparator::Comma), _)
) && self.format.is_introspection()
{
write!(out, "({})", k.format(self.format))?;
} else {
write!(out, "{}", k.format(self.format))?;
}
out.write_str(": ")?;
if matches!(
v,
Value::List(_, Some(ListSeparator::Comma), _)
) && self.format.is_introspection()
{
write!(out, "({})", v.format(self.format))?;
} else {
write!(out, "{}", v.format(self.format))?;
}
}
out.write_char(')')
}
Value::UnicodeRange(ref s) => write!(out, "{}", s),
Value::Paren(ref v) => {
out.write_char('(')?;
v.format(self.format).fmt(out)?;
out.write_char(')')
}
Value::ArgList(ref args) => {
// Note: named args not included in output.
if let Some((first, rest)) = args.positional.split_first() {
first.format(self.format).fmt(out)?;
let sep =
ListSeparator::Comma.sep(self.format.is_compressed());
for item in rest {
out.write_str(sep)?;
item.format(self.format).fmt(out)?;
}
} else {
out.write_str("()")?;
}
Ok(())
}
}
}
}
fn add_as_join(v: &Value) -> bool {
match v {
Value::List(..) => true,
Value::Literal(ref s) => !s.is_css_fn(),
Value::Call(ref name, _) => !is_function_name(name),
Value::BinOp(ref a, _, Operator::Plus, _, ref b) => {
add_as_join(a) || add_as_join(b)
}
Value::True | Value::False => true,
_ => false,
}
}