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use crate as genco;
use crate::fmt;
use crate::{quote_in, ItemStr, Lang};
use std::collections::BTreeSet;
use std::fmt::Write as _;
pub type Tokens = crate::Tokens<Python>;
#[derive(Debug, Default)]
pub struct Format {}
#[derive(Debug, Default)]
pub struct Config {}
static SEP: &'static str = ".";
#[derive(Debug, Clone, Hash, PartialOrd, Ord, PartialEq, Eq)]
pub struct Type {
module: Option<ItemStr>,
alias: Option<ItemStr>,
name: Option<ItemStr>,
}
impl_lang_item! {
impl FormatTokens<Python> for Type;
impl From<Type> for LangBox<Python>;
impl LangItem<Python> for Type {
fn format(&self, out: &mut fmt::Formatter<'_>, _: &Config, _: &Format) -> fmt::Result {
write!(out, "{}", self)
}
fn as_import(&self) -> Option<&Self> {
Some(self)
}
}
}
impl std::fmt::Display for Type {
fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let has_module = match self.module {
Some(ref module) => match self.alias {
Some(ref alias) => {
fmt.write_str(alias)?;
true
}
None => {
if let Some(part) = module.split(SEP).last() {
fmt.write_str(part)?;
true
} else {
false
}
}
},
None => false,
};
if let Some(ref name) = self.name {
if has_module {
fmt.write_str(SEP)?;
}
fmt.write_str(name.as_ref())?;
}
Ok(())
}
}
impl Type {
pub fn alias<N: Into<ItemStr>>(self, new_alias: N) -> Self {
Self {
alias: Some(new_alias.into()),
..self
}
}
pub fn name<N: Into<ItemStr>>(self, new_name: N) -> Self {
Self {
name: Some(new_name.into()),
..self
}
}
}
pub struct Python(());
impl Python {
fn imports(out: &mut Tokens, tokens: &Tokens) {
let mut modules = BTreeSet::new();
for Type { module, alias, .. } in tokens.walk_imports() {
if let Some(module) = module {
modules.insert((module.clone(), alias.clone()));
}
}
if !modules.is_empty() {
quote_in! { *out => #(for (module, alias) in modules =>
#<push>import #(module)#(if let Some(alias) = alias => #<space>as #alias)
)#<line>}
}
}
}
impl Lang for Python {
type Config = Config;
type Format = Format;
type Import = Type;
fn quote_string(out: &mut fmt::Formatter<'_>, input: &str) -> fmt::Result {
out.write_char('"')?;
for c in input.chars() {
match c {
'\t' => out.write_str("\\t")?,
'\u{0007}' => out.write_str("\\b")?,
'\n' => out.write_str("\\n")?,
'\r' => out.write_str("\\r")?,
'\u{0014}' => out.write_str("\\f")?,
'\'' => out.write_str("\\'")?,
'"' => out.write_str("\\\"")?,
'\\' => out.write_str("\\\\")?,
c => out.write_char(c)?,
};
}
out.write_char('"')?;
Ok(())
}
fn format_file(
tokens: &Tokens,
out: &mut fmt::Formatter<'_>,
config: &Self::Config,
) -> fmt::Result {
let mut imports = Tokens::new();
Self::imports(&mut imports, tokens);
let format = Format::default();
imports.format(out, config, &format)?;
tokens.format(out, config, &format)?;
Ok(())
}
}
pub fn imported<M>(module: M) -> Type
where
M: Into<ItemStr>,
{
Type {
module: Some(module.into()),
alias: None,
name: None,
}
}
pub fn local<N>(name: N) -> Type
where
N: Into<ItemStr>,
{
Type {
module: None,
alias: None,
name: Some(name.into()),
}
}