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use crate::js::expressions::computed_member_expression::FormatComputedMemberLookup;
use crate::prelude::*;
use biome_formatter::write;
use biome_js_syntax::{
JsCallExpression, JsCallExpressionFields, JsComputedMemberExpression, JsImportCallExpression,
JsStaticMemberExpression, JsStaticMemberExpressionFields, JsSyntaxNode,
TsNonNullAssertionExpression, TsNonNullAssertionExpressionFields,
};
use biome_rowan::AstNode;
use std::fmt::Debug;
#[derive(Copy, Clone, Debug)]
pub(crate) enum CallExpressionPosition {
/// At the start of a call chain.
/// `of` in `of().test`
Start,
/// Somewhere in the middle.
///
/// `b` in `a.b().c()`
Middle,
/// At the end of a call chain (root)
/// `c` in `a.b.c()`
End,
}
/// Data structure that holds the node with its formatted version
#[derive(Clone, Debug)]
pub(crate) enum ChainMember {
/// Holds onto a [biome_js_syntax::JsStaticMemberExpression]
StaticMember {
expression: JsStaticMemberExpression,
},
/// Holds onto a [biome_js_syntax::JsCallExpression]
CallExpression {
expression: JsCallExpression,
position: CallExpressionPosition,
},
/// Holds onto a [biome_js_syntax::JsComputedMemberExpression]
ComputedMember {
expression: JsComputedMemberExpression,
},
TsNonNullAssertionExpression {
expression: TsNonNullAssertionExpression,
},
/// Any other node that are not [biome_js_syntax::JsCallExpression] or [biome_js_syntax::JsStaticMemberExpression]
/// Are tracked using this variant
Node(JsSyntaxNode),
}
impl ChainMember {
/// checks if the current node is a [biome_js_syntax::JsCallExpression], or a [biome_js_syntax::JsImportExpression]
pub fn is_call_like_expression(&self) -> bool {
match self {
ChainMember::CallExpression { .. } => true,
ChainMember::Node(node) => {
JsImportCallExpression::can_cast(node.kind())
| JsCallExpression::can_cast(node.kind())
}
_ => false,
}
}
pub(crate) const fn is_call_expression(&self) -> bool {
matches!(self, ChainMember::CallExpression { .. })
}
pub(crate) fn syntax(&self) -> &JsSyntaxNode {
match self {
ChainMember::StaticMember { expression, .. } => expression.syntax(),
ChainMember::CallExpression { expression, .. } => expression.syntax(),
ChainMember::ComputedMember { expression, .. } => expression.syntax(),
ChainMember::TsNonNullAssertionExpression { expression } => expression.syntax(),
ChainMember::Node(node) => node,
}
}
pub const fn is_computed_expression(&self) -> bool {
matches!(self, ChainMember::ComputedMember { .. })
}
pub(super) fn needs_empty_line_before(&self) -> bool {
match self {
ChainMember::StaticMember { expression } => {
let operator = expression.operator_token();
match operator {
Ok(operator) => get_lines_before_token(&operator) > 1,
_ => false,
}
}
ChainMember::ComputedMember { expression } => {
let l_brack_token = expression.l_brack_token();
match l_brack_token {
Ok(l_brack_token) => {
get_lines_before_token(
&expression.optional_chain_token().unwrap_or(l_brack_token),
) > 1
}
_ => false,
}
}
_ => false,
}
}
}
impl Format<JsFormatContext> for ChainMember {
fn fmt(&self, f: &mut JsFormatter) -> FormatResult<()> {
if self.needs_empty_line_before() {
write!(f, [empty_line()])?;
}
match self {
ChainMember::StaticMember { expression } => {
let JsStaticMemberExpressionFields {
// Formatted as part of the previous item
object: _,
operator_token,
member,
} = expression.as_fields();
write!(
f,
[
format_leading_comments(expression.syntax()),
operator_token.format(),
member.format(),
format_trailing_comments(expression.syntax())
]
)
}
ChainMember::TsNonNullAssertionExpression { expression } => {
let TsNonNullAssertionExpressionFields {
expression: _,
excl_token,
} = expression.as_fields();
write!(
f,
[
format_leading_comments(expression.syntax()),
excl_token.format(),
format_trailing_comments(expression.syntax())
]
)
}
ChainMember::CallExpression {
expression,
position,
} => {
let JsCallExpressionFields {
// Formatted as part of the previous item
callee: _,
optional_chain_token,
type_arguments,
arguments,
} = expression.as_fields();
match position {
CallExpressionPosition::Start => write!(f, [expression.format()]),
CallExpressionPosition::Middle => {
write!(
f,
[
format_leading_comments(expression.syntax()),
optional_chain_token.format(),
type_arguments.format(),
arguments.format(),
format_trailing_comments(expression.syntax())
]
)
}
CallExpressionPosition::End => {
write!(
f,
[
optional_chain_token.format(),
type_arguments.format(),
arguments.format(),
]
)
}
}
}
ChainMember::ComputedMember { expression } => {
write!(
f,
[
format_leading_comments(expression.syntax()),
FormatComputedMemberLookup::new(&expression.clone().into()),
format_trailing_comments(expression.syntax())
]
)
}
ChainMember::Node(node) => {
write!(f, [node.format()])
}
}
}
}