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[reorg]: Move api/sixtyfps-rs/sixtyfps-* into api/rs

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Tobias Hunger 2022-01-31 14:06:41 +01:00 • committed by Tobias Hunger
parent 2813441cd9
commit 842f75e653
95 changed files with 65 additions and 72 deletions
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// Copyright © SixtyFPS GmbH <info@sixtyfps.io>
// SPDX-License-Identifier: (GPL-3.0-only OR LicenseRef-SixtyFPS-commercial)
/*!
**NOTE**: This library is an **internal** crate for the [SixtyFPS project](https://sixtyfps.io).
This crate should **not be used directly** by applications using SixtyFPS.
You should use the `sixtyfps` crate instead.
**WARNING**: This crate does not follow the semver convention for versioning and can
only be used with `version = "=x.y.z"` in Cargo.toml.
*/
// cSpell:ignore punct
#![doc(html_logo_url = "https://sixtyfps.io/resources/logo.drawio.svg")]
extern crate proc_macro;
use std::path::Path;
use proc_macro::{Spacing, TokenStream, TokenTree};
use quote::quote;
use sixtyfps_compilerlib::diagnostics::BuildDiagnostics;
use sixtyfps_compilerlib::parser::SyntaxKind;
use sixtyfps_compilerlib::*;
/// Returns true if the two token are touching. For example the two token `foo`and `-` are touching if
/// it was written like so in the source code: `foo-` but not when written like so `foo -`
fn are_token_touching(token1: proc_macro::Span, token2: proc_macro::Span) -> bool {
// There is no way with stable API to find out if the token are touching, so do it by
// extracting the range from the debug representation of the span
are_token_touching_impl(&format!("{:?}", token1), &format!("{:?}", token2))
}
fn are_token_touching_impl(token1_debug: &str, token2_debug: &str) -> bool {
// The debug representation of a span look like this: "#0 bytes(6662789..6662794)"
// we just have to find out if the first number of the range of second span
// is the same as the second number of the first span
let is_byte_char = |c: char| c.is_numeric() || c == ':';
let not_is_byte_char = |c: char| !is_byte_char(c);
let end_of_token1 = token1_debug
.trim_end_matches(not_is_byte_char)
.rsplit(not_is_byte_char)
.next()
.map(|x| x.trim_matches(':'));
let begin_of_token2 = token2_debug
.trim_end_matches(not_is_byte_char)
.trim_end_matches(is_byte_char)
.trim_end_matches(not_is_byte_char)
.rsplit(not_is_byte_char)
.next()
.map(|x| x.trim_matches(':'));
end_of_token1.zip(begin_of_token2).map(|(a, b)| !a.is_empty() && a == b).unwrap_or(false)
}
#[test]
fn are_token_touching_impl_test() {
assert!(are_token_touching_impl("#0 bytes(6662788..6662789)", "#0 bytes(6662789..6662794)"));
assert!(!are_token_touching_impl("#0 bytes(6662788..6662789)", "#0 bytes(6662790..6662794)"));
assert!(!are_token_touching_impl("#0 bytes(6662789..6662794)", "#0 bytes(6662788..6662789)"));
assert!(!are_token_touching_impl("#0 bytes(6662788..6662789)", "#0 bytes(662789..662794)"));
assert!(are_token_touching_impl("#0 bytes(123..456)", "#0 bytes(456..789)"));
// Alternative representation on nightly with a special flag
assert!(are_token_touching_impl("/foo/bar.rs:12:7: 12:18", "/foo/bar.rs:12:18: 12:19"));
assert!(are_token_touching_impl("/foo/bar.rs:2:7: 13:18", "/foo/bar.rs:13:18: 14:29"));
assert!(!are_token_touching_impl("/foo/bar.rs:2:7: 13:18", "/foo/bar.rs:14:18: 14:29"));
assert!(!are_token_touching_impl("/foo/bar.rs:2:7: 2:8", "/foo/bar.rs:2:18: 2:29"));
// What happens if the representation change
assert!(!are_token_touching_impl("hello", "hello"));
assert!(!are_token_touching_impl("hello42", "hello42"));
}
fn fill_token_vec(stream: impl Iterator<Item = TokenTree>, vec: &mut Vec<parser::Token>) {
let mut prev_spacing = Spacing::Alone;
let mut prev_span = proc_macro::Span::call_site();
for t in stream {
let span = t.span();
match t {
TokenTree::Ident(i) => {
if let Some(last) = vec.last_mut() {
if (last.kind == SyntaxKind::ColorLiteral && last.text.len() == 1)
|| (last.kind == SyntaxKind::Identifier
&& are_token_touching(prev_span, span))
{
last.text = format!("{}{}", last.text, i).into();
prev_span = span;
continue;
}
}
vec.push(parser::Token {
kind: SyntaxKind::Identifier,
text: i.to_string().into(),
span: Some(i.span()),
..Default::default()
});
}
TokenTree::Punct(p) => {
let kind = match p.as_char() {
':' => SyntaxKind::Colon,
'=' => {
if let Some(last) = vec.last_mut() {
let kt = match last.kind {
SyntaxKind::Star => Some((SyntaxKind::StarEqual, "*=")),
SyntaxKind::Colon => Some((SyntaxKind::ColonEqual, ":=")),
SyntaxKind::Plus => Some((SyntaxKind::PlusEqual, "+=")),
SyntaxKind::Minus => Some((SyntaxKind::MinusEqual, "-=")),
SyntaxKind::Div => Some((SyntaxKind::DivEqual, "/=")),
SyntaxKind::LAngle => Some((SyntaxKind::LessEqual, "<=")),
SyntaxKind::RAngle => Some((SyntaxKind::GreaterEqual, ">=")),
SyntaxKind::Equal => Some((SyntaxKind::EqualEqual, "==")),
SyntaxKind::Bang => Some((SyntaxKind::NotEqual, "!=")),
_ => None,
};
if let Some((k, t)) = kt {
if prev_spacing == Spacing::Joint {
last.kind = k;
last.text = t.into();
continue;
}
}
}
SyntaxKind::Equal
}
';' => SyntaxKind::Semicolon,
'!' => SyntaxKind::Bang,
'.' => SyntaxKind::Dot,
'+' => SyntaxKind::Plus,
'-' => {
if let Some(last) = vec.last_mut() {
if last.kind == SyntaxKind::Identifier
&& are_token_touching(prev_span, p.span())
{
last.text = format!("{}-", last.text).into();
prev_span = span;
continue;
}
}
SyntaxKind::Minus
}
'*' => SyntaxKind::Star,
'/' => SyntaxKind::Div,
'<' => SyntaxKind::LAngle,
'>' => {
if let Some(last) = vec.last_mut() {
if last.kind == SyntaxKind::LessEqual && prev_spacing == Spacing::Joint
{
last.kind = SyntaxKind::DoubleArrow;
last.text = "<=>".into();
continue;
} else if last.kind == SyntaxKind::Equal
&& prev_spacing == Spacing::Joint
{
last.kind = SyntaxKind::FatArrow;
last.text = "=>".into();
continue;
} else if last.kind == SyntaxKind::Minus
&& prev_spacing == Spacing::Joint
{
last.kind = SyntaxKind::Arrow;
last.text = "->".into();
continue;
}
}
SyntaxKind::RAngle
}
'#' => SyntaxKind::ColorLiteral,
'?' => SyntaxKind::Question,
',' => SyntaxKind::Comma,
'&' => {
// Since the '&' alone does not exist or cannot be part of any other token that &&
// just consider it as '&&' and skip the joint ones. FIXME. do that properly
if let Some(last) = vec.last_mut() {
if last.kind == SyntaxKind::AndAnd && prev_spacing == Spacing::Joint {
continue;
}
}
SyntaxKind::AndAnd
}
'|' => {
// Since the '|' alone does not exist or cannot be part of any other token that ||
// just consider it as '||' and skip the joint ones. FIXME. do that properly
if let Some(last) = vec.last_mut() {
if last.kind == SyntaxKind::OrOr && prev_spacing == Spacing::Joint {
continue;
}
}
SyntaxKind::OrOr
}
'%' => {
// % can only exist after number literal
if let Some(last) = vec.last_mut() {
if last.kind == SyntaxKind::NumberLiteral {
last.text = format!("{}%", last.text).into();
continue;
}
}
SyntaxKind::Error
}
'$' => SyntaxKind::Dollar,
'@' => SyntaxKind::At,
_ => SyntaxKind::Error,
};
prev_spacing = p.spacing();
vec.push(parser::Token {
kind,
text: p.to_string().into(),
span: Some(p.span()),
..Default::default()
});
}
TokenTree::Literal(l) => {
let s = l.to_string();
// Why can't the rust API give me the type of the literal
let f = s.chars().next().unwrap();
let kind = if f == '"' {
SyntaxKind::StringLiteral
} else if f.is_digit(10) {
if let Some(last) = vec.last_mut() {
if (last.kind == SyntaxKind::ColorLiteral && last.text.len() == 1)
|| (last.kind == SyntaxKind::Identifier
&& are_token_touching(prev_span, span))
{
last.text = format!("{}{}", last.text, s).into();
prev_span = span;
continue;
}
}
SyntaxKind::NumberLiteral
} else {
SyntaxKind::Error
};
vec.push(parser::Token {
kind,
text: s.into(),
span: Some(l.span()),
..Default::default()
});
}
TokenTree::Group(g) => {
use proc_macro::Delimiter::*;
use SyntaxKind::*;
let (l, r, sl, sr) = match g.delimiter() {
Parenthesis => (LParent, RParent, "(", ")"),
Brace => (LBrace, RBrace, "{", "}"),
Bracket => (LBracket, RBracket, "[", "]"),
None => todo!(),
};
vec.push(parser::Token {
kind: l,
text: sl.into(),
span: Some(g.span()), // span_open is not stable
..Default::default()
});
fill_token_vec(g.stream().into_iter(), vec);
vec.push(parser::Token {
kind: r,
text: sr.into(),
span: Some(g.span()), // span_clone is not stable
..Default::default()
});
}
}
prev_span = span;
}
}
fn extract_include_paths(
mut stream: proc_macro::token_stream::IntoIter,
) -> (impl Iterator<Item = TokenTree>, Vec<std::path::PathBuf>) {
let mut include_paths = Vec::new();
let mut remaining_stream;
loop {
remaining_stream = stream.clone();
match (stream.next(), stream.next()) {
(Some(TokenTree::Punct(p)), Some(TokenTree::Group(group)))
if p.as_char() == '#' && group.delimiter() == proc_macro::Delimiter::Bracket =>
{
let mut attr_stream = group.stream().into_iter();
match (attr_stream.next(), attr_stream.next(), attr_stream.next()) {
(
Some(TokenTree::Ident(include_ident)),
Some(TokenTree::Punct(equal_punct)),
Some(TokenTree::Literal(path)),
) if include_ident.to_string() == "include_path"
&& equal_punct.as_char() == '=' =>
{
let path_with_quotes = path.to_string();
let path_with_quotes_stripped =
if let Some(p) = path_with_quotes.strip_prefix('r') {
let hash_removed = p.trim_matches('#');
hash_removed.strip_prefix('\"').unwrap().strip_suffix('\"').unwrap()
} else {
// FIXME: unescape
path_with_quotes.trim_matches('\"')
};
include_paths.push(path_with_quotes_stripped.into());
}
_ => break,
}
}
_ => break,
}
}
(remaining_stream, include_paths)
}
/// This macro allows you to use the `.60` design markup language inline in Rust code. Within the braces of the macro
/// you can use place `.60` code and the named exported components will be available for instantiation.
///
/// [The documentation of the `sixtyfps`](./index.html) crate contains more information about the language specification and
/// how to use the generated code.
#[proc_macro]
pub fn sixtyfps(stream: TokenStream) -> TokenStream {
let token_iter = stream.into_iter();
let (token_iter, include_paths) = extract_include_paths(token_iter);
let mut tokens = vec![];
fill_token_vec(token_iter, &mut tokens);
let source_file = if let Some(cargo_manifest) = std::env::var_os("CARGO_MANIFEST_DIR") {
let mut path: std::path::PathBuf = cargo_manifest.into();
path.push("Cargo.toml");
diagnostics::SourceFileInner::from_path_only(path)
} else {
diagnostics::SourceFileInner::from_path_only(Default::default())
};
let mut diag = BuildDiagnostics::default();
let syntax_node = parser::parse_tokens(tokens.clone(), source_file, &mut diag);
if diag.has_error() {
return diag.report_macro_diagnostic(&tokens);
}
//println!("{:#?}", syntax_node);
let mut compiler_config =
CompilerConfiguration::new(sixtyfps_compilerlib::generator::OutputFormat::Rust);
if std::env::var_os("SIXTYFPS_STYLE").is_none() {
// This file is written by the sixtyfps-rendering-backend-selector's built script.
// It is in the target/xxx/build directory
let target_path = match std::env::var_os("OUT_DIR") {
Some(out_dir) => Some(
Path::new(&out_dir)
.parent()
.unwrap()
.parent()
.unwrap()
.join("SIXTYFPS_DEFAULT_STYLE.txt"),
),
None => {
// OUT_DIR is only defined when the crate having the macro has a build.rs script
// as a fallback, try to parse the rustc arguments
// https://stackoverflow.com/questions/60264534/getting-the-target-folder-from-inside-a-rust-proc-macro
let mut args = std::env::args();
let mut out_dir = None;
while let Some(arg) = args.next() {
if arg == "--out-dir" {
out_dir = args.next();
}
}
out_dir.map(|out_dir| {
Path::new(&out_dir).parent().unwrap().join("build/SIXTYFPS_DEFAULT_STYLE.txt")
})
}
};
if let Some(target_path) = target_path {
compiler_config.style =
std::fs::read_to_string(target_path).map(|style| style.trim().into()).ok()
}
}
compiler_config.include_paths = include_paths;
let (root_component, diag) =
spin_on::spin_on(compile_syntax_node(syntax_node, diag, compiler_config));
//println!("{:#?}", tree);
if diag.has_error() {
return diag.report_macro_diagnostic(&tokens);
}
let mut result = generator::rust::generate(&root_component);
// Make sure to recompile if any of the external files changes
let reload = diag
.all_loaded_files
.iter()
.filter(|path| path.is_absolute() && !path.ends_with("Cargo.toml"))
.filter_map(|p| p.to_str())
.map(|p| quote! {const _ : &'static [u8] = ::core::include_bytes!(#p);});
result.extend(reload);
result.extend(quote! {const _ : Option<&'static str> = ::core::option_env!("SIXTYFPS_STYLE");});
result.into()
}