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use crate::{
comments::rewrite_with_comments,
config::user_def::FieldAlignment,
formatter::{
shape::{ExprKind, LineStyle},
*,
},
utils::{
map::byte_span::{ByteSpan, LeafSpans},
CurlyBrace,
},
};
use std::fmt::Write;
use sway_ast::{
keywords::{ColonToken, EnumToken, Keyword, Token},
CommaToken, ItemEnum, PubToken,
};
use sway_types::{ast::Delimiter, Spanned};
#[cfg(test)]
mod tests;
impl Format for ItemEnum {
fn format(
&self,
formatted_code: &mut FormattedCode,
formatter: &mut Formatter,
) -> Result<(), FormatterError> {
formatter.with_shape(
formatter
.shape
.with_code_line_from(LineStyle::Multiline, ExprKind::default()),
|formatter| -> Result<(), FormatterError> {
// Required for comment formatting
let start_len = formatted_code.len();
// If there is a visibility token add it to the formatted_code with a ` ` after it.
if self.visibility.is_some() {
write!(formatted_code, "{} ", PubToken::AS_STR)?;
}
// Add enum token and name
write!(formatted_code, "{} ", EnumToken::AS_STR)?;
self.name.format(formatted_code, formatter)?;
// Format `GenericParams`, if any
if let Some(generics) = &self.generics {
generics.format(formatted_code, formatter)?;
}
let fields = self.fields.get();
formatter.shape.code_line.update_expr_new_line(true);
// Handle opening brace
Self::open_curly_brace(formatted_code, formatter)?;
// Determine alignment tactic
match formatter.config.structures.field_alignment {
FieldAlignment::AlignFields(enum_variant_align_threshold) => {
writeln!(formatted_code)?;
let type_fields = &fields
.value_separator_pairs
.iter()
// TODO: Handle annotations instead of stripping them.
// See: https://github.com/FuelLabs/sway/issues/6802
.map(|(type_field, _comma_token)| &type_field.value)
.collect::<Vec<_>>();
// In first iteration we are going to be collecting the lengths of the enum variants.
let variants_lengths: Vec<usize> = type_fields
.iter()
.map(|type_field| type_field.name.as_str().len())
.collect();
// Find the maximum length that is still smaller than the align threshold.
let mut max_valid_variant_length = 0;
variants_lengths.iter().for_each(|length| {
if *length > max_valid_variant_length
&& *length < enum_variant_align_threshold
{
max_valid_variant_length = *length;
}
});
for (var_index, type_field) in type_fields.iter().enumerate() {
write!(formatted_code, "{}", formatter.indent_to_str()?)?;
// Add name
type_field.name.format(formatted_code, formatter)?;
let current_variant_length = variants_lengths[var_index];
if current_variant_length < max_valid_variant_length {
// We need to add alignment between : and ty
// max_valid_variant_length: the length of the variant that we are taking as a reference to align
// current_variant_length: the length of the current variant that we are trying to format
let mut required_alignment =
max_valid_variant_length - current_variant_length;
while required_alignment != 0 {
write!(formatted_code, " ")?;
required_alignment -= 1;
}
}
// Add `:`, ty & `CommaToken`
write!(formatted_code, " {} ", ColonToken::AS_STR)?;
type_field.ty.format(formatted_code, formatter)?;
writeln!(formatted_code, "{}", CommaToken::AS_STR)?;
}
if let Some(final_value) = &fields.final_value_opt {
final_value.format(formatted_code, formatter)?;
writeln!(formatted_code)?;
}
}
FieldAlignment::Off => fields.format(formatted_code, formatter)?,
}
// Handle closing brace
Self::close_curly_brace(formatted_code, formatter)?;
rewrite_with_comments::<ItemEnum>(
formatter,
self.span(),
self.leaf_spans(),
formatted_code,
start_len,
)?;
Ok(())
},
)?;
Ok(())
}
}
impl CurlyBrace for ItemEnum {
fn open_curly_brace(
line: &mut String,
formatter: &mut Formatter,
) -> Result<(), FormatterError> {
let open_brace = Delimiter::Brace.as_open_char();
// Add opening brace to the same line
write!(line, " {open_brace}")?;
formatter.indent();
Ok(())
}
fn close_curly_brace(
line: &mut String,
formatter: &mut Formatter,
) -> Result<(), FormatterError> {
// If shape is becoming left-most aligned or - indent just have the default shape
formatter.unindent();
write!(
line,
"{}{}",
formatter.indent_to_str()?,
Delimiter::Brace.as_close_char()
)?;
Ok(())
}
}
impl LeafSpans for ItemEnum {
fn leaf_spans(&self) -> Vec<ByteSpan> {
let mut collected_spans = Vec::new();
if let Some(visibility) = &self.visibility {
collected_spans.push(ByteSpan::from(visibility.span()));
}
collected_spans.push(ByteSpan::from(self.enum_token.span()));
collected_spans.push(ByteSpan::from(self.name.span()));
if let Some(generics) = &self.generics {
collected_spans.push(ByteSpan::from(generics.parameters.span()))
}
collected_spans.append(&mut self.fields.leaf_spans());
collected_spans
}
}