simplecss-0.2.2/.cargo_vcs_info.json 0000644 00000000136 00000000001 0013037 0 ustar {
"git": {
"sha1": "6eacb39ca5c4c2390bfde374ed0651f0e35c9d8d"
},
"path_in_vcs": ""
} simplecss-0.2.2/AUTHORS 0000644 0000000 0000000 00000000463 10461020230 0012702 0 ustar 0000000 0000000 # This is the list of SimpleCSS's significant contributors.
#
# This does not necessarily list everyone who has contributed code,
# especially since many employees of one corporation may be contributing.
# To see the full list of contributors, see the revision history in
# source control.
Yevhenii Reizner
simplecss-0.2.2/CHANGELOG.md 0000644 0000000 0000000 00000003076 10461020230 0013446 0 ustar 0000000 0000000 # Changelog
The latest published SimpleCSS release is [0.2.2](#022-2025-01-06) which was released on 2022-01-06.
You can find its changes [documented below](#022-2025-01-06).
## [Unreleased]
This release has an [MSRV][] of 1.65.
## [0.2.2][] (2025-01-06)
This release has an [MSRV][] of 1.65.
This is the first release under the stewardship of [Linebender][], who is now responsible for maintenance of this crate.
Many thanks to Yevhenii Reizner for the years of hard work that he has poured into this and other crates.
### Added
- Support for `no_std`. ([#17][] by [@waywardmonkeys][])
## [0.2.1][] (2021-07-20)
- Add rules sorting by specificity. ([#7][] by [@baskerville][])
## [0.2.0][] (2019-08-17)
- A complete rewrite.
## 0.1.0 (2017-01-14)
- Initial release.
[MSRV]: README.md#minimum-supported-rust-version-msrv
[Linebender]: https://github.com/linebender
[#7]: https://github.com/linebender/simplecss/pull/7
[#17]: https://github.com/linebender/simplecss/pull/17
[@baskerville]: https://github.com/baskerville
[@waywardmonkeys]: https://github.com/waywardmonkeys
[Unreleased]: https://github.com/RazrFalcon/simplecss/compare/v0.2.2...HEAD
[0.2.2]: https://github.com/RazrFalcon/simplecss/compare/v0.2.1...v0.2.2
[0.2.1]: https://github.com/RazrFalcon/simplecss/compare/v0.2.0...v0.2.1
[0.2.0]: https://github.com/RazrFalcon/simplecss/compare/v0.1.0...v0.2.0
simplecss-0.2.2/Cargo.lock 0000644 00000002031 00000000001 0011006 0 ustar # This file is automatically @generated by Cargo.
# It is not intended for manual editing.
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[[package]]
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version = "0.2.2"
dependencies = [
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simplecss-0.2.2/Cargo.toml 0000644 00000006457 00000000001 0011051 0 ustar # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
edition = "2021"
rust-version = "1.65"
name = "simplecss"
version = "0.2.2"
build = false
exclude = [
".github",
".clippy.toml",
".gitignore",
".typos.toml",
]
autolib = false
autobins = false
autoexamples = false
autotests = false
autobenches = false
description = "A simple CSS 2 parser and selector."
readme = "README.md"
keywords = [
"css",
"parser",
"selector",
]
categories = ["parser-implementations"]
license = "Apache-2.0 OR MIT"
repository = "https://github.com/linebender/simplecss"
[lib]
name = "simplecss"
path = "src/lib.rs"
[[example]]
name = "parse"
path = "examples/parse.rs"
[[example]]
name = "select"
path = "examples/select.rs"
[[test]]
name = "declaration_tokenizer"
path = "tests/declaration_tokenizer.rs"
[[test]]
name = "select"
path = "tests/select.rs"
[[test]]
name = "selector_tokenizer"
path = "tests/selector_tokenizer.rs"
[[test]]
name = "specificity"
path = "tests/specificity.rs"
[[test]]
name = "stylesheet"
path = "tests/stylesheet.rs"
[[test]]
name = "warnings"
path = "tests/warnings.rs"
[dependencies.log]
version = "0.4.22"
default-features = false
[dev-dependencies.env_logger]
version = "0.11.6"
default-features = false
[dev-dependencies.roxmltree]
version = "0.20.0"
[features]
default = ["std"]
std = ["log/std"]
[lints.clippy]
allow_attributes = "warn"
allow_attributes_without_reason = "warn"
cargo_common_metadata = "warn"
cast_possible_truncation = "warn"
collection_is_never_read = "warn"
dbg_macro = "warn"
debug_assert_with_mut_call = "warn"
doc_markdown = "warn"
exhaustive_enums = "warn"
fn_to_numeric_cast_any = "warn"
infinite_loop = "warn"
large_include_file = "warn"
large_stack_arrays = "warn"
match_same_arms = "warn"
mismatching_type_param_order = "warn"
missing_assert_message = "warn"
missing_errors_doc = "warn"
missing_fields_in_debug = "warn"
missing_panics_doc = "warn"
negative_feature_names = "warn"
partial_pub_fields = "warn"
redundant_feature_names = "warn"
return_self_not_must_use = "warn"
same_functions_in_if_condition = "warn"
semicolon_if_nothing_returned = "warn"
shadow_unrelated = "warn"
should_panic_without_expect = "warn"
todo = "warn"
too_many_arguments = "allow"
unseparated_literal_suffix = "warn"
use_self = "warn"
wildcard_dependencies = "warn"
wildcard_imports = "warn"
[lints.rust]
elided_lifetimes_in_paths = "warn"
keyword_idents_2024 = "forbid"
let_underscore_drop = "warn"
missing_debug_implementations = "warn"
missing_docs = "warn"
non_ascii_idents = "forbid"
non_local_definitions = "forbid"
single_use_lifetimes = "warn"
trivial_numeric_casts = "warn"
unexpected_cfgs = "warn"
unit_bindings = "warn"
unnameable_types = "warn"
unreachable_pub = "warn"
unsafe_code = "forbid"
unsafe_op_in_unsafe_fn = "forbid"
unused_import_braces = "warn"
unused_lifetimes = "warn"
unused_macro_rules = "warn"
unused_qualifications = "warn"
variant_size_differences = "warn"
simplecss-0.2.2/Cargo.toml.orig 0000644 0000000 0000000 00000005373 10461020230 0014526 0 ustar 0000000 0000000 [package]
name = "simplecss"
version = "0.2.2"
license = "Apache-2.0 OR MIT"
edition = "2021"
description = "A simple CSS 2 parser and selector."
repository = "https://github.com/linebender/simplecss"
keywords = ["css", "parser", "selector"]
categories = ["parser-implementations"]
readme = "README.md"
# Keep in sync with RUST_MIN_VER in .github/workflows/ci.yml and with the relevant README.md files.
# and with the MSRV in the `Unreleased` section of CHANGELOG.md.
rust-version = "1.65"
exclude = [".github", ".clippy.toml", ".gitignore", ".typos.toml"]
[lints]
rust.unsafe_code = "forbid"
# LINEBENDER LINT SET - Cargo.toml - v3
# See https://linebender.org/wiki/canonical-lints/
rust.keyword_idents_2024 = "forbid"
rust.non_ascii_idents = "forbid"
rust.non_local_definitions = "forbid"
rust.unsafe_op_in_unsafe_fn = "forbid"
rust.elided_lifetimes_in_paths = "warn"
rust.let_underscore_drop = "warn"
rust.missing_debug_implementations = "warn"
rust.missing_docs = "warn"
rust.single_use_lifetimes = "warn"
rust.trivial_numeric_casts = "warn"
rust.unexpected_cfgs = "warn"
rust.unit_bindings = "warn"
rust.unnameable_types = "warn"
rust.unreachable_pub = "warn"
rust.unused_import_braces = "warn"
rust.unused_lifetimes = "warn"
rust.unused_macro_rules = "warn"
rust.unused_qualifications = "warn"
rust.variant_size_differences = "warn"
clippy.too_many_arguments = "allow"
clippy.allow_attributes = "warn"
clippy.allow_attributes_without_reason = "warn"
clippy.cast_possible_truncation = "warn"
clippy.collection_is_never_read = "warn"
clippy.dbg_macro = "warn"
clippy.debug_assert_with_mut_call = "warn"
clippy.doc_markdown = "warn"
clippy.exhaustive_enums = "warn"
clippy.fn_to_numeric_cast_any = "warn"
clippy.infinite_loop = "warn"
clippy.large_include_file = "warn"
clippy.large_stack_arrays = "warn"
clippy.match_same_arms = "warn"
clippy.mismatching_type_param_order = "warn"
clippy.missing_assert_message = "warn"
clippy.missing_errors_doc = "warn"
clippy.missing_fields_in_debug = "warn"
clippy.missing_panics_doc = "warn"
clippy.partial_pub_fields = "warn"
clippy.return_self_not_must_use = "warn"
clippy.same_functions_in_if_condition = "warn"
clippy.semicolon_if_nothing_returned = "warn"
clippy.shadow_unrelated = "warn"
clippy.should_panic_without_expect = "warn"
clippy.todo = "warn"
clippy.unseparated_literal_suffix = "warn"
clippy.use_self = "warn"
clippy.wildcard_imports = "warn"
clippy.cargo_common_metadata = "warn"
clippy.negative_feature_names = "warn"
clippy.redundant_feature_names = "warn"
clippy.wildcard_dependencies = "warn"
# END LINEBENDER LINT SET
[features]
default = ["std"]
std = ["log/std"]
[dependencies]
log = { version = "0.4.22", default-features = false }
[dev-dependencies]
env_logger = { version = "0.11.6", default-features = false }
roxmltree = "0.20.0"
simplecss-0.2.2/LICENSE-APACHE 0000644 0000000 0000000 00000025137 10461020230 0013563 0 ustar 0000000 0000000 Apache License
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http://www.apache.org/licenses/
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simplecss-0.2.2/LICENSE-MIT 0000644 0000000 0000000 00000002072 10461020230 0013264 0 ustar 0000000 0000000 The MIT License (MIT)
Copyright (c) 2018 Reizner Evgeniy
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simplecss-0.2.2/README.md 0000644 0000000 0000000 00000007067 10461020230 0013120 0 ustar 0000000 0000000
# SimpleCSS
**A simple [CSS 2.1](https://www.w3.org/TR/CSS21/) parser and selector.**
[](https://xi.zulipchat.com/#narrow/channel/465085-resvg)
[](https://deps.rs/repo/github/linebender/simplecss)
[](#license)
[](https://github.com/linebender/simplecss/actions)
[](https://crates.io/crates/simplecss)
[](https://docs.rs/simplecss)
This is not a browser-grade CSS parser.
If you need one, use [cssparser](https://crates.io/crates/cssparser) + [selectors](https://crates.io/crates/selectors).
Since it's very simple we will start with limitations:
## Limitations
- [At-rules](https://www.w3.org/TR/CSS21/syndata.html#at-rules) are not supported.
They will be skipped during parsing.
- Property values are not parsed.
In CSS like `* { width: 5px }` you will get a `width` property with a `5px` value as a string.
- CDO/CDC comments are not supported.
- Parser is case sensitive.
All keywords must be lowercase.
- Unicode escape, like `\26`, is not supported.
## Features
- Selector matching support.
- The rules are sorted by specificity.
- `!important` parsing support.
- Has a high-level parsers and low-level, zero-allocation tokenizers.
- No unsafe.
## Minimum supported Rust Version (MSRV)
This version of SimpleCSS has been verified to compile with **Rust 1.65** and later.
Future versions of SimpleCSS might increase the Rust version requirement.
It will not be treated as a breaking change and as such can even happen with small patch releases.
Click here if compiling fails.
As time has passed, some of SimpleCSS's dependencies could have released versions with a higher Rust requirement.
If you encounter a compilation issue due to a dependency and don't want to upgrade your Rust toolchain, then you could downgrade the dependency.
```sh
# Use the problematic dependency's name and version
cargo update -p package_name --precise 0.1.1
```
## Community
[](https://xi.zulipchat.com/#narrow/channel/465085-resvg)
Discussion of SimpleCSS development happens in the Linebender Zulip at , specifically the [#resvg channel](https://xi.zulipchat.com/#narrow/channel/465085-resvg).
All public content can be read without logging in.
## License
Licensed under either of
- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or )
- MIT license ([LICENSE-MIT](LICENSE-MIT) or )
at your option.
## Contribution
Contributions are welcome by pull request. The [Rust code of conduct] applies.
Please feel free to add your name to the [AUTHORS] file in any substantive pull request.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.
[Rust Code of Conduct]: https://www.rust-lang.org/policies/code-of-conduct
[AUTHORS]: ./AUTHORS
simplecss-0.2.2/examples/parse.rs 0000644 0000000 0000000 00000001573 10461020230 0015133 0 ustar 0000000 0000000 // Copyright 2019 the SimpleCSS Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT
//! Parse
use std::io::{Read, Write};
fn main() {
let args: Vec<_> = std::env::args().collect();
if args.len() != 2 {
println!("Usage:\n\tparse style.css\n\tparse - 'p {{ color:red }}'");
std::process::exit(1);
}
std::env::set_var("RUST_LOG", "simplecss=warn");
env_logger::builder()
.format(|buf, record| writeln!(buf, "{}: {}", record.level(), record.args()))
.init();
let text = if args[1] == "-" {
let mut buffer = String::new();
let stdin = std::io::stdin();
let mut handle = stdin.lock();
handle.read_to_string(&mut buffer).unwrap();
buffer
} else {
std::fs::read_to_string(&args[1]).unwrap()
};
let style = simplecss::StyleSheet::parse(&text);
println!("{:#?}", style);
}
simplecss-0.2.2/examples/select.rs 0000644 0000000 0000000 00000005053 10461020230 0015275 0 ustar 0000000 0000000 // Copyright 2019 the SimpleCSS Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT
//! Select
struct XmlNode<'a, 'input: 'a>(roxmltree::Node<'a, 'input>);
impl<'a, 'input: 'a> XmlNode<'a, 'input> {
fn select(&self, text: &str) -> Option> {
let selectors = simplecss::Selector::parse(text)?;
self.0
.descendants()
.filter(|n| n.is_element())
.find(|&node| selectors.matches(&XmlNode(node)))
}
}
impl simplecss::Element for XmlNode<'_, '_> {
fn parent_element(&self) -> Option {
self.0.parent_element().map(XmlNode)
}
fn prev_sibling_element(&self) -> Option {
self.0
.prev_siblings()
.filter(|n| n.is_element())
.nth(0)
.map(XmlNode)
}
fn has_local_name(&self, local_name: &str) -> bool {
self.0.tag_name().name() == local_name
}
fn attribute_matches(
&self,
local_name: &str,
operator: simplecss::AttributeOperator<'_>,
) -> bool {
match self.0.attribute(local_name) {
Some(value) => operator.matches(value),
None => false,
}
}
fn pseudo_class_matches(&self, class: simplecss::PseudoClass<'_>) -> bool {
match class {
simplecss::PseudoClass::FirstChild => self.prev_sibling_element().is_none(),
_ => false, // Since we are querying a static XML we can ignore other pseudo-classes.
}
}
}
fn main() {
let doc = roxmltree::Document::parse(
"",
)
.unwrap();
let root = XmlNode(doc.root_element());
assert_eq!(
root.select("rect:first-child")
.unwrap()
.attribute("id")
.unwrap(),
"rect1",
"selected wrong element"
);
assert_eq!(
root.select("[color=red]").unwrap().attribute("id").unwrap(),
"rect2",
"selected wrong element"
);
assert_eq!(
root.select("svg rect").unwrap().attribute("id").unwrap(),
"rect1",
"selected wrong element"
);
assert_eq!(
root.select("svg > g > rect")
.unwrap()
.attribute("id")
.unwrap(),
"rect1",
"selected wrong element"
);
assert_eq!(
root.select(".blue").unwrap().attribute("id").unwrap(),
"rect1",
"selected wrong element"
);
}
simplecss-0.2.2/src/lib.rs 0000644 0000000 0000000 00000034461 10461020230 0013542 0 ustar 0000000 0000000 // Copyright 2016 the SimpleCSS Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT
/*!
A simple [CSS 2.1](https://www.w3.org/TR/CSS21/) parser and selector.
This is not a browser-grade CSS parser. If you need one,
use [cssparser](https://crates.io/crates/cssparser) +
[selectors](https://crates.io/crates/selectors).
Since it's very simple we will start with limitations:
## Limitations
- [At-rules](https://www.w3.org/TR/CSS21/syndata.html#at-rules) are not supported.
They will be skipped during parsing.
- Property values are not parsed.
In CSS like `* { width: 5px }` you will get a `width` property with a `5px` value as a string.
- CDO/CDC comments are not supported.
- Parser is case sensitive. All keywords must be lowercase.
- Unicode escape, like `\26`, is not supported.
## Features
- Selector matching support.
- The rules are sorted by specificity.
- `!important` parsing support.
- Has a high-level parsers and low-level, zero-allocation tokenizers.
- No unsafe.
*/
// LINEBENDER LINT SET - lib.rs - v2
// See https://linebender.org/wiki/canonical-lints/
// These lints aren't included in Cargo.toml because they
// shouldn't apply to examples and tests
#![warn(unused_crate_dependencies)]
#![warn(clippy::print_stdout, clippy::print_stderr)]
// Targeting e.g. 32-bit means structs containing usize can give false positives for 64-bit.
#![cfg_attr(target_pointer_width = "64", warn(clippy::trivially_copy_pass_by_ref))]
// END LINEBENDER LINT SET
#![cfg_attr(docsrs, feature(doc_auto_cfg))]
#![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
// The following lints are part of the Linebender standard set,
// but resolving them has been deferred for now.
// Feel free to send a PR that solves one or more of these.
#![allow(
missing_debug_implementations,
unreachable_pub,
clippy::use_self,
clippy::missing_assert_message,
clippy::missing_panics_doc,
clippy::exhaustive_enums,
clippy::unseparated_literal_suffix
)]
#![cfg_attr(test, allow(unused_crate_dependencies))] // Some dev dependencies are only used in tests
extern crate alloc;
use alloc::vec::Vec;
use core::fmt;
use log::warn;
mod selector;
mod stream;
pub use selector::*;
use stream::Stream;
/// A list of possible errors.
#[derive(Clone, Copy, PartialEq, Debug)]
pub enum Error {
/// The steam ended earlier than we expected.
///
/// Should only appear on invalid input data.
UnexpectedEndOfStream,
/// An invalid ident.
InvalidIdent(TextPos),
/// An unclosed comment.
InvalidComment(TextPos),
/// An invalid declaration value.
InvalidValue(TextPos),
/// An invalid byte.
#[allow(missing_docs)]
InvalidByte {
expected: u8,
actual: u8,
pos: TextPos,
},
/// A missing selector.
SelectorMissing,
/// An unexpected selector.
UnexpectedSelector,
/// An unexpected combinator.
UnexpectedCombinator,
/// An invalid or unsupported attribute selector.
InvalidAttributeSelector,
/// An invalid language pseudo-class.
InvalidLanguagePseudoClass,
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
Error::UnexpectedEndOfStream => {
write!(f, "unexpected end of stream")
}
Error::InvalidIdent(pos) => {
write!(f, "invalid ident at {}", pos)
}
Error::InvalidComment(pos) => {
write!(f, "invalid comment at {}", pos)
}
Error::InvalidValue(pos) => {
write!(f, "invalid value at {}", pos)
}
Error::InvalidByte {
expected,
actual,
pos,
} => {
write!(
f,
"expected '{}' not '{}' at {}",
expected as char, actual as char, pos
)
}
Error::SelectorMissing => {
write!(f, "selector missing")
}
Error::UnexpectedSelector => {
write!(f, "unexpected selector")
}
Error::UnexpectedCombinator => {
write!(f, "unexpected combinator")
}
Error::InvalidAttributeSelector => {
write!(f, "invalid or unsupported attribute selector")
}
Error::InvalidLanguagePseudoClass => {
write!(f, "invalid language pseudo-class")
}
}
}
}
#[cfg(feature = "std")]
impl std::error::Error for Error {}
/// A position in text.
///
/// Position indicates a row/line and a column in the original text. Starting from 1:1.
#[derive(Clone, Copy, PartialEq, Debug)]
#[allow(missing_docs)]
pub struct TextPos {
pub row: u32,
pub col: u32,
}
impl TextPos {
/// Constructs a new `TextPos`.
///
/// Should not be invoked manually, but rather via `Stream::gen_text_pos`.
pub fn new(row: u32, col: u32) -> TextPos {
TextPos { row, col }
}
}
impl fmt::Display for TextPos {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}:{}", self.row, self.col)
}
}
/// A declaration.
#[derive(Clone, Copy, PartialEq, Debug)]
#[allow(missing_docs)]
pub struct Declaration<'a> {
pub name: &'a str,
pub value: &'a str,
pub important: bool,
}
/// A rule.
#[derive(Clone, Debug)]
pub struct Rule<'a> {
/// A rule selector.
pub selector: Selector<'a>,
/// A rule declarations.
pub declarations: Vec>,
}
/// A style sheet.
#[derive(Clone, Debug)]
pub struct StyleSheet<'a> {
/// A list of rules.
pub rules: Vec>,
}
impl<'a> StyleSheet<'a> {
/// Creates an empty style sheet.
pub fn new() -> Self {
StyleSheet { rules: Vec::new() }
}
/// Parses a style sheet from text.
///
/// At-rules are not supported and will be skipped.
///
/// # Errors
///
/// Doesn't produce any errors. In worst case scenario will return an empty stylesheet.
///
/// All warnings will be logged.
pub fn parse(text: &'a str) -> Self {
let mut sheet = StyleSheet::new();
sheet.parse_more(text);
sheet
}
/// Parses a style sheet from a text to the current style sheet.
pub fn parse_more(&mut self, text: &'a str) {
let mut s = Stream::from(text);
if s.skip_spaces_and_comments().is_err() {
return;
}
while !s.at_end() {
if s.skip_spaces_and_comments().is_err() {
break;
}
let _ = consume_statement(&mut s, &mut self.rules);
}
if !s.at_end() {
warn!("{} bytes were left.", s.slice_tail().len());
}
// Remove empty rules.
self.rules.retain(|rule| !rule.declarations.is_empty());
// Sort the rules by specificity.
self.rules
.sort_by_cached_key(|rule| rule.selector.specificity());
}
}
impl fmt::Display for StyleSheet<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
for (i, rule) in self.rules.iter().enumerate() {
write!(f, "{} {{ ", rule.selector)?;
for dec in &rule.declarations {
write!(f, "{}:{}", dec.name, dec.value)?;
if dec.important {
write!(f, " !important")?;
}
write!(f, ";")?;
}
write!(f, " }}")?;
if i != self.rules.len() - 1 {
writeln!(f)?;
}
}
Ok(())
}
}
impl Default for StyleSheet<'_> {
fn default() -> Self {
Self::new()
}
}
fn consume_statement<'a>(s: &mut Stream<'a>, rules: &mut Vec>) -> Result<(), Error> {
if s.curr_byte() == Ok(b'@') {
s.advance(1);
consume_at_rule(s)
} else {
consume_rule_set(s, rules)
}
}
fn consume_at_rule(s: &mut Stream<'_>) -> Result<(), Error> {
let ident = s.consume_ident()?;
warn!("The @{} rule is not supported. Skipped.", ident);
s.skip_bytes(|c| c != b';' && c != b'{');
match s.curr_byte()? {
b';' => s.advance(1),
b'{' => consume_block(s),
_ => {}
}
Ok(())
}
fn consume_rule_set<'a>(s: &mut Stream<'a>, rules: &mut Vec>) -> Result<(), Error> {
let start_rule_idx = rules.len();
while s.curr_byte()? == b',' || start_rule_idx == rules.len() {
if s.curr_byte()? == b',' {
s.advance(1);
}
let (selector, offset) = parse(s.slice_tail());
s.advance(offset);
s.skip_spaces();
if let Some(selector) = selector {
rules.push(Rule {
selector,
declarations: Vec::new(),
});
}
match s.curr_byte()? {
b'{' => break,
b',' => {}
_ => {
s.skip_bytes(|c| c != b'{');
break;
}
}
}
s.try_consume_byte(b'{');
let declarations = consume_declarations(s)?;
for rule in rules.iter_mut().skip(start_rule_idx) {
rule.declarations = declarations.clone();
}
s.try_consume_byte(b'}');
Ok(())
}
fn consume_block(s: &mut Stream<'_>) {
s.try_consume_byte(b'{');
consume_until_block_end(s);
}
fn consume_until_block_end(s: &mut Stream<'_>) {
// Block can have nested blocks, so we have to check for matching braces.
// We simply counting the number of opening braces, which is incorrect,
// since `{` can be inside a string, but it's fine for majority of the cases.
let mut braces = 0;
while !s.at_end() {
match s.curr_byte_unchecked() {
b'{' => {
braces += 1;
}
b'}' => {
if braces == 0 {
break;
} else {
braces -= 1;
}
}
_ => {}
}
s.advance(1);
}
s.try_consume_byte(b'}');
}
fn consume_declarations<'a>(s: &mut Stream<'a>) -> Result>, Error> {
let mut declarations = Vec::new();
while !s.at_end() && s.curr_byte() != Ok(b'}') {
match consume_declaration(s) {
Ok(declaration) => declarations.push(declaration),
Err(_) => {
consume_until_block_end(s);
break;
}
}
}
Ok(declarations)
}
/// A declaration tokenizer.
///
/// Tokenizer will stop at the first invalid token.
///
/// # Example
///
/// ```
/// use simplecss::{DeclarationTokenizer, Declaration};
///
/// let mut t = DeclarationTokenizer::from("background: url(\"img.png\"); color:red !important");
/// assert_eq!(t.next().unwrap(), Declaration { name: "background", value: "url(\"img.png\")", important: false });
/// assert_eq!(t.next().unwrap(), Declaration { name: "color", value: "red", important: true });
/// ```
pub struct DeclarationTokenizer<'a> {
stream: Stream<'a>,
}
impl<'a> From<&'a str> for DeclarationTokenizer<'a> {
fn from(text: &'a str) -> Self {
DeclarationTokenizer {
stream: Stream::from(text),
}
}
}
impl<'a> Iterator for DeclarationTokenizer<'a> {
type Item = Declaration<'a>;
fn next(&mut self) -> Option {
let _ = self.stream.skip_spaces_and_comments();
if self.stream.at_end() {
return None;
}
match consume_declaration(&mut self.stream) {
Ok(v) => Some(v),
Err(_) => {
self.stream.jump_to_end();
None
}
}
}
}
fn consume_declaration<'a>(s: &mut Stream<'a>) -> Result, Error> {
s.skip_spaces_and_comments()?;
// Parse name.
// https://snook.ca/archives/html_and_css/targetting_ie7
if s.curr_byte() == Ok(b'*') {
s.advance(1);
}
let name = s.consume_ident()?;
s.skip_spaces_and_comments()?;
s.consume_byte(b':')?;
s.skip_spaces_and_comments()?;
// Parse value.
let start = s.pos();
let mut end = s.pos();
while consume_term(s).is_ok() {
end = s.pos();
s.skip_spaces_and_comments()?;
}
let value = s.slice_range(start, end).trim();
s.skip_spaces_and_comments()?;
// Check for `important`.
let mut important = false;
if s.curr_byte() == Ok(b'!') {
s.advance(1);
s.skip_spaces_and_comments()?;
if s.slice_tail().starts_with("important") {
s.advance(9);
important = true;
}
}
s.skip_spaces_and_comments()?;
while s.curr_byte() == Ok(b';') {
s.advance(1);
s.skip_spaces_and_comments()?;
}
s.skip_spaces_and_comments()?;
if value.is_empty() {
return Err(Error::InvalidValue(s.gen_text_pos_from(start)));
}
Ok(Declaration {
name,
value,
important,
})
}
fn consume_term(s: &mut Stream<'_>) -> Result<(), Error> {
fn consume_digits(s: &mut Stream<'_>) {
while let Ok(b'0'..=b'9') = s.curr_byte() {
s.advance(1);
}
}
match s.curr_byte()? {
b'#' => {
s.advance(1);
match s.consume_ident() {
Ok(_) => {}
Err(_) => {
// Try consume as a hex color.
while let Ok(c) = s.curr_byte() {
match c {
b'0'..=b'9' | b'a'..=b'f' | b'A'..=b'F' => s.advance(1),
_ => break,
}
}
}
}
}
b'+' | b'-' | b'0'..=b'9' | b'.' => {
// Consume number.
s.advance(1);
consume_digits(s);
if s.curr_byte() == Ok(b'.') {
s.advance(1);
consume_digits(s);
}
if s.curr_byte() == Ok(b'%') {
s.advance(1);
} else {
// Consume suffix if any.
let _ = s.consume_ident();
}
}
b'\'' | b'"' => {
s.consume_string()?;
}
b',' => {
s.advance(1);
}
_ => {
let _ = s.consume_ident()?;
// Consume function.
if s.curr_byte() == Ok(b'(') {
s.skip_bytes(|c| c != b')');
s.consume_byte(b')')?;
}
}
}
Ok(())
}
simplecss-0.2.2/src/selector.rs 0000644 0000000 0000000 00000047533 10461020230 0014620 0 ustar 0000000 0000000 // Copyright 2019 the SimpleCSS Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT
use alloc::{vec, vec::Vec};
use core::fmt;
use log::warn;
use crate::stream::Stream;
use crate::Error;
/// An attribute selector operator.
#[derive(Clone, Copy, PartialEq, Debug)]
pub enum AttributeOperator<'a> {
/// `[attr]`
Exists,
/// `[attr=value]`
Matches(&'a str),
/// `[attr~=value]`
Contains(&'a str),
/// `[attr|=value]`
StartsWith(&'a str),
}
impl AttributeOperator<'_> {
/// Checks that value is matching the operator.
pub fn matches(&self, value: &str) -> bool {
match *self {
AttributeOperator::Exists => true,
AttributeOperator::Matches(v) => value == v,
AttributeOperator::Contains(v) => value.split(' ').any(|s| s == v),
AttributeOperator::StartsWith(v) => {
// exactly `v` or beginning with `v` immediately followed by `-`
if value == v {
true
} else if value.starts_with(v) {
value.get(v.len()..v.len() + 1) == Some("-")
} else {
false
}
}
}
}
}
/// A pseudo-class.
#[derive(Clone, Copy, PartialEq, Debug)]
#[allow(missing_docs)]
pub enum PseudoClass<'a> {
FirstChild,
Link,
Visited,
Hover,
Active,
Focus,
Lang(&'a str),
}
impl fmt::Display for PseudoClass<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
PseudoClass::FirstChild => write!(f, "first-child"),
PseudoClass::Link => write!(f, "link"),
PseudoClass::Visited => write!(f, "visited"),
PseudoClass::Hover => write!(f, "hover"),
PseudoClass::Active => write!(f, "active"),
PseudoClass::Focus => write!(f, "focus"),
PseudoClass::Lang(lang) => write!(f, "lang({})", lang),
}
}
}
/// A trait to query an element node metadata.
pub trait Element: Sized {
/// Returns a parent element.
fn parent_element(&self) -> Option;
/// Returns a previous sibling element.
fn prev_sibling_element(&self) -> Option;
/// Checks that the element has a specified local name.
fn has_local_name(&self, name: &str) -> bool;
/// Checks that the element has a specified attribute.
fn attribute_matches(&self, local_name: &str, operator: AttributeOperator<'_>) -> bool;
/// Checks that the element matches a specified pseudo-class.
fn pseudo_class_matches(&self, class: PseudoClass<'_>) -> bool;
}
#[derive(Clone, Copy, PartialEq, Debug)]
enum SimpleSelectorType<'a> {
Type(&'a str),
Universal,
}
#[derive(Clone, Copy, PartialEq, Debug)]
enum SubSelector<'a> {
Attribute(&'a str, AttributeOperator<'a>),
PseudoClass(PseudoClass<'a>),
}
#[derive(Clone, Debug)]
struct SimpleSelector<'a> {
kind: SimpleSelectorType<'a>,
subselectors: Vec>,
}
#[derive(Clone, Copy, PartialEq, Debug)]
enum Combinator {
None,
Descendant,
Child,
AdjacentSibling,
}
#[derive(Clone, Debug)]
struct Component<'a> {
/// A combinator that precede the selector.
combinator: Combinator,
selector: SimpleSelector<'a>,
}
/// A selector.
#[derive(Clone, Debug)]
pub struct Selector<'a> {
components: Vec>,
}
impl<'a> Selector<'a> {
/// Parses a selector from a string.
///
/// Will log any errors as a warnings.
///
/// Parsing will be stopped at EOF, `,` or `{`.
pub fn parse(text: &'a str) -> Option {
parse(text).0
}
/// Compute the selector's specificity.
///
/// Cf. .
pub fn specificity(&self) -> [u8; 3] {
let mut spec = [0u8; 3];
for selector in self.components.iter().map(|c| &c.selector) {
if matches!(selector.kind, SimpleSelectorType::Type(_)) {
spec[2] = spec[2].saturating_add(1);
}
for sub in &selector.subselectors {
match sub {
SubSelector::Attribute("id", _) => spec[0] = spec[0].saturating_add(1),
_ => spec[1] = spec[1].saturating_add(1),
}
}
}
spec
}
/// Checks that the provided element matches the current selector.
pub fn matches(&self, element: &E) -> bool {
assert!(!self.components.is_empty(), "selector must not be empty");
assert_eq!(
self.components[0].combinator,
Combinator::None,
"the first component must not have a combinator"
);
self.matches_impl(self.components.len() - 1, element)
}
fn matches_impl(&self, idx: usize, element: &E) -> bool {
let component = &self.components[idx];
if !match_selector(&component.selector, element) {
return false;
}
match component.combinator {
Combinator::Descendant => {
let mut parent = element.parent_element();
while let Some(e) = parent {
if self.matches_impl(idx - 1, &e) {
return true;
}
parent = e.parent_element();
}
false
}
Combinator::Child => {
if let Some(parent) = element.parent_element() {
if self.matches_impl(idx - 1, &parent) {
return true;
}
}
false
}
Combinator::AdjacentSibling => {
if let Some(prev) = element.prev_sibling_element() {
if self.matches_impl(idx - 1, &prev) {
return true;
}
}
false
}
Combinator::None => true,
}
}
}
fn match_selector(selector: &SimpleSelector<'_>, element: &E) -> bool {
if let SimpleSelectorType::Type(ident) = selector.kind {
if !element.has_local_name(ident) {
return false;
}
}
for sub in &selector.subselectors {
match sub {
SubSelector::Attribute(name, operator) => {
if !element.attribute_matches(name, *operator) {
return false;
}
}
SubSelector::PseudoClass(class) => {
if !element.pseudo_class_matches(*class) {
return false;
}
}
}
}
true
}
pub(crate) fn parse(text: &str) -> (Option>, usize) {
let mut components: Vec> = Vec::new();
let mut combinator = Combinator::None;
let mut tokenizer = SelectorTokenizer::from(text);
for token in &mut tokenizer {
let mut add_sub = |sub| {
if combinator == Combinator::None && !components.is_empty() {
if let Some(ref mut component) = components.last_mut() {
component.selector.subselectors.push(sub);
}
} else {
components.push(Component {
selector: SimpleSelector {
kind: SimpleSelectorType::Universal,
subselectors: vec![sub],
},
combinator,
});
combinator = Combinator::None;
}
};
let token = match token {
Ok(t) => t,
Err(e) => {
warn!("Selector parsing failed cause {}.", e);
return (None, tokenizer.stream.pos());
}
};
match token {
SelectorToken::UniversalSelector => {
components.push(Component {
selector: SimpleSelector {
kind: SimpleSelectorType::Universal,
subselectors: Vec::new(),
},
combinator,
});
combinator = Combinator::None;
}
SelectorToken::TypeSelector(ident) => {
components.push(Component {
selector: SimpleSelector {
kind: SimpleSelectorType::Type(ident),
subselectors: Vec::new(),
},
combinator,
});
combinator = Combinator::None;
}
SelectorToken::ClassSelector(ident) => {
add_sub(SubSelector::Attribute(
"class",
AttributeOperator::Contains(ident),
));
}
SelectorToken::IdSelector(id) => {
add_sub(SubSelector::Attribute("id", AttributeOperator::Matches(id)));
}
SelectorToken::AttributeSelector(name, op) => {
add_sub(SubSelector::Attribute(name, op));
}
SelectorToken::PseudoClass(ident) => {
let class = match ident {
"first-child" => PseudoClass::FirstChild,
"link" => PseudoClass::Link,
"visited" => PseudoClass::Visited,
"hover" => PseudoClass::Hover,
"active" => PseudoClass::Active,
"focus" => PseudoClass::Focus,
_ => {
warn!("':{}' is not supported. Selector skipped.", ident);
return (None, tokenizer.stream.pos());
}
};
// TODO: duplicates
// TODO: order
add_sub(SubSelector::PseudoClass(class));
}
SelectorToken::LangPseudoClass(lang) => {
add_sub(SubSelector::PseudoClass(PseudoClass::Lang(lang)));
}
SelectorToken::DescendantCombinator => {
combinator = Combinator::Descendant;
}
SelectorToken::ChildCombinator => {
combinator = Combinator::Child;
}
SelectorToken::AdjacentCombinator => {
combinator = Combinator::AdjacentSibling;
}
}
}
if components.is_empty() {
(None, tokenizer.stream.pos())
} else if components[0].combinator != Combinator::None {
debug_assert_eq!(
components[0].combinator,
Combinator::None,
"the first component must not have a combinator"
);
(None, tokenizer.stream.pos())
} else {
(Some(Selector { components }), tokenizer.stream.pos())
}
}
impl fmt::Display for Selector<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
for component in &self.components {
match component.combinator {
Combinator::Descendant => write!(f, " ")?,
Combinator::Child => write!(f, " > ")?,
Combinator::AdjacentSibling => write!(f, " + ")?,
Combinator::None => {}
}
match component.selector.kind {
SimpleSelectorType::Universal => write!(f, "*")?,
SimpleSelectorType::Type(ident) => write!(f, "{}", ident)?,
};
for sel in &component.selector.subselectors {
match sel {
SubSelector::Attribute(name, operator) => {
match operator {
AttributeOperator::Exists => {
write!(f, "[{}]", name)?;
}
AttributeOperator::Matches(value) => {
write!(f, "[{}='{}']", name, value)?;
}
AttributeOperator::Contains(value) => {
write!(f, "[{}~='{}']", name, value)?;
}
AttributeOperator::StartsWith(value) => {
write!(f, "[{}|='{}']", name, value)?;
}
};
}
SubSelector::PseudoClass(class) => write!(f, ":{}", class)?,
}
}
}
Ok(())
}
}
/// A selector token.
#[derive(Clone, Copy, PartialEq, Debug)]
pub enum SelectorToken<'a> {
/// `*`
UniversalSelector,
/// `div`
TypeSelector(&'a str),
/// `.class`
ClassSelector(&'a str),
/// `#id`
IdSelector(&'a str),
/// `[color=red]`
AttributeSelector(&'a str, AttributeOperator<'a>),
/// `:first-child`
PseudoClass(&'a str),
/// `:lang(en)`
LangPseudoClass(&'a str),
/// `a b`
DescendantCombinator,
/// `a > b`
ChildCombinator,
/// `a + b`
AdjacentCombinator,
}
/// A selector tokenizer.
///
/// # Example
///
/// ```
/// use simplecss::{SelectorTokenizer, SelectorToken};
///
/// let mut t = SelectorTokenizer::from("div > p:first-child");
/// assert_eq!(t.next().unwrap().unwrap(), SelectorToken::TypeSelector("div"));
/// assert_eq!(t.next().unwrap().unwrap(), SelectorToken::ChildCombinator);
/// assert_eq!(t.next().unwrap().unwrap(), SelectorToken::TypeSelector("p"));
/// assert_eq!(t.next().unwrap().unwrap(), SelectorToken::PseudoClass("first-child"));
/// assert!(t.next().is_none());
/// ```
pub struct SelectorTokenizer<'a> {
stream: Stream<'a>,
after_combinator: bool,
finished: bool,
}
impl<'a> From<&'a str> for SelectorTokenizer<'a> {
fn from(text: &'a str) -> Self {
SelectorTokenizer {
stream: Stream::from(text),
after_combinator: true,
finished: false,
}
}
}
impl<'a> Iterator for SelectorTokenizer<'a> {
type Item = Result, Error>;
fn next(&mut self) -> Option {
if self.finished || self.stream.at_end() {
if self.after_combinator {
self.after_combinator = false;
return Some(Err(Error::SelectorMissing));
}
return None;
}
macro_rules! try2 {
($e:expr) => {
match $e {
Ok(v) => v,
Err(e) => {
self.finished = true;
return Some(Err(e));
}
}
};
}
match self.stream.curr_byte_unchecked() {
b'*' => {
if !self.after_combinator {
self.finished = true;
return Some(Err(Error::UnexpectedSelector));
}
self.after_combinator = false;
self.stream.advance(1);
Some(Ok(SelectorToken::UniversalSelector))
}
b'#' => {
self.after_combinator = false;
self.stream.advance(1);
let ident = try2!(self.stream.consume_ident());
Some(Ok(SelectorToken::IdSelector(ident)))
}
b'.' => {
self.after_combinator = false;
self.stream.advance(1);
let ident = try2!(self.stream.consume_ident());
Some(Ok(SelectorToken::ClassSelector(ident)))
}
b'[' => {
self.after_combinator = false;
self.stream.advance(1);
let ident = try2!(self.stream.consume_ident());
let op = match try2!(self.stream.curr_byte()) {
b']' => AttributeOperator::Exists,
b'=' => {
self.stream.advance(1);
let value = try2!(self.stream.consume_string());
AttributeOperator::Matches(value)
}
b'~' => {
self.stream.advance(1);
try2!(self.stream.consume_byte(b'='));
let value = try2!(self.stream.consume_string());
AttributeOperator::Contains(value)
}
b'|' => {
self.stream.advance(1);
try2!(self.stream.consume_byte(b'='));
let value = try2!(self.stream.consume_string());
AttributeOperator::StartsWith(value)
}
_ => {
self.finished = true;
return Some(Err(Error::InvalidAttributeSelector));
}
};
try2!(self.stream.consume_byte(b']'));
Some(Ok(SelectorToken::AttributeSelector(ident, op)))
}
b':' => {
self.after_combinator = false;
self.stream.advance(1);
let ident = try2!(self.stream.consume_ident());
if ident == "lang" {
try2!(self.stream.consume_byte(b'('));
let lang = self.stream.consume_bytes(|c| c != b')').trim();
try2!(self.stream.consume_byte(b')'));
if lang.is_empty() {
self.finished = true;
return Some(Err(Error::InvalidLanguagePseudoClass));
}
Some(Ok(SelectorToken::LangPseudoClass(lang)))
} else {
Some(Ok(SelectorToken::PseudoClass(ident)))
}
}
b'>' => {
if self.after_combinator {
self.after_combinator = false;
self.finished = true;
return Some(Err(Error::UnexpectedCombinator));
}
self.stream.advance(1);
self.after_combinator = true;
Some(Ok(SelectorToken::ChildCombinator))
}
b'+' => {
if self.after_combinator {
self.after_combinator = false;
self.finished = true;
return Some(Err(Error::UnexpectedCombinator));
}
self.stream.advance(1);
self.after_combinator = true;
Some(Ok(SelectorToken::AdjacentCombinator))
}
b' ' | b'\t' | b'\n' | b'\r' | b'\x0C' => {
self.stream.skip_spaces();
if self.after_combinator {
return self.next();
}
while self.stream.curr_byte() == Ok(b'/') {
try2!(self.stream.skip_comment());
self.stream.skip_spaces();
}
match self.stream.curr_byte() {
Ok(b'>') | Ok(b'+') | Ok(b',') | Ok(b'{') | Err(_) => self.next(),
_ => {
if self.after_combinator {
self.after_combinator = false;
self.finished = true;
return Some(Err(Error::UnexpectedSelector));
}
self.after_combinator = true;
Some(Ok(SelectorToken::DescendantCombinator))
}
}
}
b'/' => {
if self.stream.next_byte() == Ok(b'*') {
try2!(self.stream.skip_comment());
} else {
self.finished = true;
}
self.next()
}
b',' | b'{' => {
self.finished = true;
self.next()
}
_ => {
let ident = try2!(self.stream.consume_ident());
if !self.after_combinator {
self.finished = true;
return Some(Err(Error::UnexpectedSelector));
}
self.after_combinator = false;
Some(Ok(SelectorToken::TypeSelector(ident)))
}
}
}
}
simplecss-0.2.2/src/stream.rs 0000644 0000000 0000000 00000016310 10461020230 0014260 0 ustar 0000000 0000000 // Copyright 2016 the SimpleCSS Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT
use core::str;
use crate::{Error, TextPos};
trait CssCharExt {
fn is_name_start(&self) -> bool;
fn is_name_char(&self) -> bool;
fn is_non_ascii(&self) -> bool;
fn is_escape(&self) -> bool;
}
impl CssCharExt for char {
#[inline]
fn is_name_start(&self) -> bool {
match *self {
'_' | 'a'..='z' | 'A'..='Z' => true,
_ => self.is_non_ascii() || self.is_escape(),
}
}
#[inline]
fn is_name_char(&self) -> bool {
match *self {
'_' | 'a'..='z' | 'A'..='Z' | '0'..='9' | '-' => true,
_ => self.is_non_ascii() || self.is_escape(),
}
}
#[inline]
fn is_non_ascii(&self) -> bool {
*self as u32 > 237
}
#[inline]
fn is_escape(&self) -> bool {
// TODO: this
false
}
}
#[derive(Clone, Copy, PartialEq, Debug)]
pub(crate) struct Stream<'a> {
text: &'a str,
pos: usize,
end: usize,
}
impl<'a> From<&'a str> for Stream<'a> {
fn from(text: &'a str) -> Self {
Stream::new(text)
}
}
impl<'a> Stream<'a> {
pub fn new(text: &'a str) -> Self {
Stream {
text,
pos: 0,
end: text.len(),
}
}
#[inline]
pub fn pos(&self) -> usize {
self.pos
}
#[inline]
pub fn jump_to_end(&mut self) {
self.pos = self.end;
}
#[inline]
pub fn at_end(&self) -> bool {
self.pos >= self.end
}
#[inline]
pub fn curr_byte(&self) -> Result {
if self.at_end() {
return Err(Error::UnexpectedEndOfStream);
}
Ok(self.curr_byte_unchecked())
}
#[inline]
pub fn curr_byte_unchecked(&self) -> u8 {
self.text.as_bytes()[self.pos]
}
#[inline]
pub fn next_byte(&self) -> Result {
if self.pos + 1 >= self.end {
return Err(Error::UnexpectedEndOfStream);
}
Ok(self.text.as_bytes()[self.pos + 1])
}
#[inline]
pub fn advance(&mut self, n: usize) {
debug_assert!(self.pos + n <= self.end);
self.pos += n;
}
pub fn consume_byte(&mut self, c: u8) -> Result<(), Error> {
if self.curr_byte()? != c {
return Err(Error::InvalidByte {
expected: c,
actual: self.curr_byte()?,
pos: self.gen_text_pos(),
});
}
self.advance(1);
Ok(())
}
pub fn try_consume_byte(&mut self, c: u8) {
if self.curr_byte() == Ok(c) {
self.advance(1);
}
}
pub fn consume_bytes(&mut self, f: F) -> &'a str
where
F: Fn(u8) -> bool,
{
let start = self.pos;
self.skip_bytes(f);
self.slice_back(start)
}
pub fn skip_bytes(&mut self, f: F)
where
F: Fn(u8) -> bool,
{
while !self.at_end() && f(self.curr_byte_unchecked()) {
self.advance(1);
}
}
#[inline]
fn chars(&self) -> str::Chars<'a> {
self.text[self.pos..self.end].chars()
}
#[inline]
pub fn slice_range(&self, start: usize, end: usize) -> &'a str {
&self.text[start..end]
}
#[inline]
pub fn slice_back(&self, pos: usize) -> &'a str {
&self.text[pos..self.pos]
}
#[inline]
pub fn slice_tail(&self) -> &'a str {
&self.text[self.pos..]
}
#[inline]
pub fn skip_spaces(&mut self) {
while !self.at_end() {
match self.curr_byte_unchecked() {
b' ' | b'\t' | b'\n' | b'\r' | b'\x0C' => self.advance(1),
_ => break,
}
}
}
#[inline]
pub fn skip_spaces_and_comments(&mut self) -> Result<(), Error> {
self.skip_spaces();
while self.curr_byte() == Ok(b'/') && self.next_byte() == Ok(b'*') {
self.skip_comment()?;
self.skip_spaces();
}
Ok(())
}
pub fn consume_ident(&mut self) -> Result<&'a str, Error> {
let start = self.pos();
if self.curr_byte() == Ok(b'-') {
self.advance(1);
}
let mut iter = self.chars();
if let Some(c) = iter.next() {
if c.is_name_start() {
self.advance(c.len_utf8());
} else {
return Err(Error::InvalidIdent(self.gen_text_pos_from(start)));
}
}
for c in iter {
if c.is_name_char() {
self.advance(c.len_utf8());
} else {
break;
}
}
if start == self.pos() {
return Err(Error::InvalidIdent(self.gen_text_pos_from(start)));
}
let name = self.slice_back(start);
Ok(name)
}
pub fn consume_string(&mut self) -> Result<&'a str, Error> {
// Check for opening quote.
let quote = self.curr_byte()?;
if quote == b'\'' || quote == b'"' {
let mut prev = quote;
self.advance(1);
let start = self.pos();
while !self.at_end() {
let curr = self.curr_byte_unchecked();
// Advance until the closing quote.
if curr == quote {
// Check for escaped quote.
if prev != b'\\' {
break;
}
}
prev = curr;
self.advance(1);
}
let value = self.slice_back(start);
// Check for closing quote.
self.consume_byte(quote)?;
Ok(value)
} else {
self.consume_ident()
}
}
pub fn skip_comment(&mut self) -> Result<(), Error> {
let start = self.pos();
self.skip_comment_impl()
.map_err(|_| Error::InvalidComment(self.gen_text_pos_from(start)))?;
Ok(())
}
fn skip_comment_impl(&mut self) -> Result<(), Error> {
self.consume_byte(b'/')?;
self.consume_byte(b'*')?;
while !self.at_end() {
let curr = self.curr_byte_unchecked();
if curr == b'*' && self.next_byte() == Ok(b'/') {
break;
}
self.advance(1);
}
self.consume_byte(b'*')?;
self.consume_byte(b'/')?;
Ok(())
}
#[inline(never)]
pub fn gen_text_pos(&self) -> TextPos {
let row = Self::calc_curr_row(self.text, self.pos);
let col = Self::calc_curr_col(self.text, self.pos);
TextPos::new(row, col)
}
#[inline(never)]
pub fn gen_text_pos_from(&self, pos: usize) -> TextPos {
let mut s = *self;
s.pos = core::cmp::min(pos, self.text.len());
s.gen_text_pos()
}
fn calc_curr_row(text: &str, end: usize) -> u32 {
let mut row = 1;
for c in &text.as_bytes()[..end] {
if *c == b'\n' {
row += 1;
}
}
row
}
fn calc_curr_col(text: &str, end: usize) -> u32 {
let mut col = 1;
for c in text[..end].chars().rev() {
if c == '\n' {
break;
} else {
col += 1;
}
}
col
}
}
simplecss-0.2.2/tests/declaration_tokenizer.rs 0000644 0000000 0000000 00000007474 10461020230 0017732 0 ustar 0000000 0000000 // Copyright 2019 the SimpleCSS Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT
//! Declaration Tokenizer
use simplecss::*;
macro_rules! tokenize {
($name:ident, $text:expr, $( $token:expr ),*) => (
#[test]
fn $name() {
let mut t = DeclarationTokenizer::from($text);
$(
assert_eq!(t.next().unwrap(), $token);
)*
assert!(t.next().is_none());
}
)
}
fn declare<'a>(name: &'a str, value: &'a str) -> Declaration<'a> {
Declaration {
name,
value,
important: false,
}
}
fn declare_important<'a>(name: &'a str, value: &'a str) -> Declaration<'a> {
Declaration {
name,
value,
important: true,
}
}
tokenize!(tokenize_01, "",);
tokenize!(tokenize_02, " ",);
tokenize!(tokenize_03, "/**/",);
tokenize!(tokenize_04, "color:red", declare("color", "red"));
tokenize!(tokenize_05, "color:red;", declare("color", "red"));
tokenize!(tokenize_06, "color:red ", declare("color", "red"));
tokenize!(tokenize_07, " color: red; ", declare("color", "red"));
tokenize!(tokenize_08, " color : red ; ", declare("color", "red"));
tokenize!(
tokenize_09,
" color:red;;;;color:red; ",
declare("color", "red"),
declare("color", "red")
);
tokenize!(
tokenize_10,
"background: url(\"img.png\");",
declare("background", "url(\"img.png\")")
);
tokenize!(
tokenize_11,
"background: url(\"{}\");",
declare("background", "url(\"{}\")")
);
tokenize!(
tokenize_12,
"color: red ! important",
declare_important("color", "red")
);
tokenize!(
tokenize_13,
"color: red !important",
declare_important("color", "red")
);
tokenize!(
tokenize_14,
"color: red!important",
declare_important("color", "red")
);
tokenize!(
tokenize_15,
"color: red !/**/important",
declare_important("color", "red")
);
tokenize!(
tokenize_16,
"border: 1em solid blue",
declare("border", "1em solid blue")
);
tokenize!(
tokenize_17,
"background: navy url(support/diamond.png) -2em -2em no-repeat",
declare(
"background",
"navy url(support/diamond.png) -2em -2em no-repeat"
)
);
tokenize!(tokenize_18, "/**/color:red", declare("color", "red"));
tokenize!(tokenize_19, "/* *\\/*/color: red;", declare("color", "red"));
tokenize!(
tokenize_20,
"/**/color/**/:/**/red/**/;/**/",
declare("color", "red")
);
tokenize!(tokenize_21, "\ncolor\n:\nred\n;\n", declare("color", "red"));
tokenize!(tokenize_22, "{color:red}",);
tokenize!(tokenize_23, "(color:red)",);
tokenize!(tokenize_24, "[color:red]",);
tokenize!(tokenize_25, "color:",);
tokenize!(tokenize_26, "value:\"text\"", declare("value", "\"text\""));
tokenize!(tokenize_27, "value:'text'", declare("value", "'text'"));
tokenize!(tokenize_28, "color:#fff", declare("color", "#fff"));
tokenize!(tokenize_29, "color:0.5", declare("color", "0.5"));
tokenize!(tokenize_30, "color:.5", declare("color", ".5"));
tokenize!(tokenize_31, "color:#FFF", declare("color", "#FFF"));
tokenize!(
tokenize_32,
"content: counter(chapno, upper-roman) \". \"",
declare("content", "counter(chapno, upper-roman) \". \"")
);
tokenize!(
tokenize_33,
"font-family:'Noto Serif','DejaVu Serif',serif",
declare("font-family", "'Noto Serif','DejaVu Serif',serif")
);
tokenize!(tokenize_34, "*zoom:1;", declare("zoom", "1"));
//tokenize!(tokenize_, "@unsupported { splines: reticulating } color: green",
// declare("color", "green")
//);
//tokenize!(tokenize_, "/*\\*/*/color: red;", declare("color", "red"));
//tokenize!(tokenize_, "\"this is a string]}\"\"[{\\\"'\"; /*should be parsed as a string but be ignored*/
// {{}}[]''; /*should be parsed as nested blocks and a string but be ignored*/
// color: red;", declare("color", "red"));
simplecss-0.2.2/tests/select.rs 0000644 0000000 0000000 00000021055 10461020230 0014621 0 ustar 0000000 0000000 // Copyright 2019 the SimpleCSS Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT
//! Select
use simplecss::*;
struct XmlNode<'a, 'input: 'a>(roxmltree::Node<'a, 'input>);
impl<'a, 'input: 'a> XmlNode<'a, 'input> {
fn select(&self, text: &str) -> Vec> {
let selectors = Selector::parse(text).unwrap();
let mut nodes = Vec::new();
for node in self.0.descendants().filter(|n| n.is_element()) {
if selectors.matches(&XmlNode(node)) {
nodes.push(node);
}
}
nodes
}
}
impl Element for XmlNode<'_, '_> {
fn parent_element(&self) -> Option {
self.0.parent_element().map(XmlNode)
}
fn prev_sibling_element(&self) -> Option {
self.0.prev_sibling_element().map(XmlNode)
}
fn has_local_name(&self, local_name: &str) -> bool {
self.0.tag_name().name() == local_name
}
fn attribute_matches(&self, local_name: &str, operator: AttributeOperator<'_>) -> bool {
match self.0.attribute(local_name) {
Some(value) => operator.matches(value),
None => false,
}
}
fn pseudo_class_matches(&self, class: PseudoClass<'_>) -> bool {
match class {
PseudoClass::FirstChild => self.prev_sibling_element().is_none(),
_ => false,
}
}
}
macro_rules! match_single {
($doc:expr, $selector:expr) => {{
let nodes = XmlNode($doc.root_element()).select($selector);
assert_eq!(nodes.len(), 1);
nodes[0].attribute("id").unwrap()
}};
}
macro_rules! match_none {
($doc:expr, $selector:expr) => {{
assert_eq!(XmlNode($doc.root_element()).select($selector).len(), 0);
}};
}
#[test]
fn select_01() {
let doc = roxmltree::Document::parse("").unwrap();
assert_eq!(match_single!(doc, "*"), "div1");
}
#[test]
fn select_02() {
let doc = roxmltree::Document::parse("").unwrap();
assert_eq!(match_single!(doc, "div"), "div1");
match_none!(doc, "p");
}
#[test]
fn select_03() {
let doc = roxmltree::Document::parse("").unwrap();
assert_eq!(match_single!(doc, "#div1"), "div1");
match_none!(doc, "#d1");
}
#[test]
fn select_04() {
let doc = roxmltree::Document::parse("").unwrap();
match_none!(doc, "p#div1");
}
#[test]
fn select_05() {
let doc = roxmltree::Document::parse(
"\