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use crate::{
comments::rewrite_with_comments,
config::{items::ItemBraceStyle, user_def::FieldAlignment},
formatter::{
shape::{ExprKind, LineStyle},
*,
},
utils::{
map::byte_span::{ByteSpan, LeafSpans},
CurlyBrace,
},
};
use std::fmt::Write;
use sway_ast::{keywords::Token, ItemStorage, StorageField};
use sway_types::{ast::Delimiter, Spanned};
#[cfg(test)]
mod tests;
impl Format for ItemStorage {
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();
// Add storage token
write!(formatted_code, "{}", self.storage_token.span().as_str())?;
let fields = self.fields.get();
// Handle opening brace
Self::open_curly_brace(formatted_code, formatter)?;
// Determine alignment tactic
match formatter.config.structures.field_alignment {
FieldAlignment::AlignFields(storage_field_align_threshold) => {
writeln!(formatted_code)?;
let value_pairs = &fields
.value_separator_pairs
.iter()
// TODO: Handle annotations instead of stripping them
.map(|(storage_field, comma_token)| (&storage_field.value, comma_token))
.collect::<Vec<_>>();
// In first iteration we are going to be collecting the lengths of the
// struct fields.
let field_length: Vec<usize> = value_pairs
.iter()
.map(|(storage_field, _)| storage_field.name.as_str().len())
.collect();
// Find the maximum length in the `field_length` vector that is still
// smaller than `storage_field_align_threshold`. `max_valid_field_length`:
// the length of the field that we are taking as a reference to align.
let mut max_valid_field_length = 0;
field_length.iter().for_each(|length| {
if *length > max_valid_field_length
&& *length < storage_field_align_threshold
{
max_valid_field_length = *length;
}
});
let value_pairs_iter = value_pairs.iter().enumerate();
for (field_index, (storage_field, comma_token)) in value_pairs_iter.clone()
{
write!(formatted_code, "{}", &formatter.indent_str()?)?;
// Add name
storage_field.name.format(formatted_code, formatter)?;
// `current_field_length`: the length of the current field that we are
// trying to format.
let current_field_length = field_length[field_index];
if current_field_length < max_valid_field_length {
// We need to add alignment between `:` and `ty`
let mut required_alignment =
max_valid_field_length - current_field_length;
while required_alignment != 0 {
write!(formatted_code, " ")?;
required_alignment -= 1;
}
}
// Add `:`, `ty` & `CommaToken`
write!(
formatted_code,
" {} ",
storage_field.colon_token.ident().as_str(),
)?;
storage_field.ty.format(formatted_code, formatter)?;
write!(
formatted_code,
" {} ",
storage_field.eq_token.ident().as_str()
)?;
storage_field
.initializer
.format(formatted_code, formatter)?;
writeln!(formatted_code, "{}", comma_token.ident().as_str())?;
}
if let Some(final_value) = &fields.final_value_opt {
final_value.format(formatted_code, formatter)?;
}
}
FieldAlignment::Off => fields.format(formatted_code, formatter)?,
}
// Handle closing brace
Self::close_curly_brace(formatted_code, formatter)?;
rewrite_with_comments::<ItemStorage>(
formatter,
self.span(),
self.leaf_spans(),
formatted_code,
start_len,
)?;
Ok(())
},
)?;
Ok(())
}
}
impl CurlyBrace for ItemStorage {
fn open_curly_brace(
line: &mut String,
formatter: &mut Formatter,
) -> Result<(), FormatterError> {
let brace_style = formatter.config.items.item_brace_style;
formatter.indent();
let open_brace = Delimiter::Brace.as_open_char();
match brace_style {
ItemBraceStyle::AlwaysNextLine => {
// Add opening brace to the next line.
write!(line, "\n{open_brace}")?;
}
_ => {
// Add opening brace to the same line
write!(line, " {open_brace}")?;
}
}
Ok(())
}
fn close_curly_brace(
line: &mut String,
formatter: &mut Formatter,
) -> Result<(), FormatterError> {
// shrink_left would return error if the current indentation level is becoming < 0, in that
// case we should use the Shape::default() which has 0 indentation level.
formatter.unindent();
write!(
line,
"{}{}",
formatter.indent_str()?,
Delimiter::Brace.as_close_char()
)?;
Ok(())
}
}
impl LeafSpans for ItemStorage {
fn leaf_spans(&self) -> Vec<ByteSpan> {
let mut collected_spans = vec![ByteSpan::from(self.storage_token.span())];
collected_spans.append(&mut self.fields.leaf_spans());
collected_spans
}
}
impl LeafSpans for StorageField {
fn leaf_spans(&self) -> Vec<ByteSpan> {
let mut collected_spans = vec![ByteSpan::from(self.name.span())];
collected_spans.push(ByteSpan::from(self.colon_token.span()));
collected_spans.append(&mut self.ty.leaf_spans());
collected_spans.push(ByteSpan::from(self.eq_token.span()));
collected_spans.append(&mut self.initializer.leaf_spans());
collected_spans
}
}