зеркало из https://github.com/mozilla/gecko-dev.git
457 строки
19 KiB
Rust
457 строки
19 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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//! Wrapper around Gecko's CSS error reporting mechanism.
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#![allow(unsafe_code)]
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use cssparser::{serialize_identifier, CowRcStr, ToCss};
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use cssparser::{BasicParseErrorKind, ParseError, ParseErrorKind, SourceLocation, Token};
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use selectors::parser::SelectorParseErrorKind;
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use std::ffi::CStr;
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use std::ptr;
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use style::error_reporting::{ContextualParseError, ParseErrorReporter};
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use style::gecko_bindings::bindings;
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use style::gecko_bindings::structs::URLExtraData as RawUrlExtraData;
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use style::gecko_bindings::structs::{nsIURI, Loader, StyleSheet as DomStyleSheet};
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use style::stylesheets::UrlExtraData;
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use style_traits::{StyleParseErrorKind, ValueParseErrorKind};
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pub type ErrorKind<'i> = ParseErrorKind<'i, StyleParseErrorKind<'i>>;
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/// An error reporter with all the data we need to report errors.
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pub struct ErrorReporter {
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sheet: *const DomStyleSheet,
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loader: *const Loader,
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uri: *mut nsIURI,
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}
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impl ErrorReporter {
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/// Create a new instance of the Gecko error reporter, if error reporting is
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/// enabled.
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pub fn new(
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sheet: *mut DomStyleSheet,
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loader: *mut Loader,
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extra_data: *mut RawUrlExtraData,
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) -> Option<Self> {
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if !Self::reporting_enabled(sheet, loader) {
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return None;
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}
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let uri = unsafe {
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extra_data
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.as_ref()
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.map(|d| d.mBaseURI.raw::<nsIURI>())
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.unwrap_or(ptr::null_mut())
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};
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Some(ErrorReporter { sheet, loader, uri })
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}
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}
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enum ErrorString<'a> {
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Snippet(CowRcStr<'a>),
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Ident(CowRcStr<'a>),
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UnexpectedToken(Token<'a>),
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}
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impl<'a> ErrorString<'a> {
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fn into_str(self) -> CowRcStr<'a> {
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match self {
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ErrorString::Snippet(s) => s,
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ErrorString::UnexpectedToken(t) => t.to_css_string().into(),
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ErrorString::Ident(i) => {
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let mut s = String::new();
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serialize_identifier(&i, &mut s).unwrap();
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s.into()
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},
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}
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}
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}
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#[derive(Debug)]
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enum Action {
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Nothing,
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Skip,
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Drop,
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}
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trait ErrorHelpers<'a> {
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fn error_data(self) -> (CowRcStr<'a>, ErrorKind<'a>);
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fn error_params(self) -> ErrorParams<'a>;
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fn to_gecko_message(&self) -> (Option<&'static CStr>, &'static CStr, Action);
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}
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fn extract_error_param<'a>(err: ErrorKind<'a>) -> Option<ErrorString<'a>> {
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Some(match err {
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ParseErrorKind::Basic(BasicParseErrorKind::UnexpectedToken(t)) => {
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ErrorString::UnexpectedToken(t)
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},
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ParseErrorKind::Basic(BasicParseErrorKind::AtRuleInvalid(i)) |
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ParseErrorKind::Custom(StyleParseErrorKind::UnsupportedAtRule(i)) => {
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let mut s = String::from("@");
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serialize_identifier(&i, &mut s).unwrap();
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ErrorString::Snippet(s.into())
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},
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ParseErrorKind::Custom(StyleParseErrorKind::OtherInvalidValue(property)) => {
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ErrorString::Snippet(property)
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},
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ParseErrorKind::Custom(StyleParseErrorKind::SelectorError(
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SelectorParseErrorKind::UnexpectedIdent(ident),
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)) => ErrorString::Ident(ident),
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ParseErrorKind::Custom(StyleParseErrorKind::UnknownProperty(property)) => {
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ErrorString::Ident(property)
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},
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ParseErrorKind::Custom(StyleParseErrorKind::UnexpectedTokenWithinNamespace(token)) => {
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ErrorString::UnexpectedToken(token)
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},
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_ => return None,
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})
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}
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struct ErrorParams<'a> {
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prefix_param: Option<ErrorString<'a>>,
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main_param: Option<ErrorString<'a>>,
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}
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/// If an error parameter is present in the given error, return it. Additionally return
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/// a second parameter if it exists, for use in the prefix for the eventual error message.
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fn extract_error_params<'a>(err: ErrorKind<'a>) -> Option<ErrorParams<'a>> {
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let (main, prefix) = match err {
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ParseErrorKind::Custom(StyleParseErrorKind::InvalidColor(property, token)) |
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ParseErrorKind::Custom(StyleParseErrorKind::InvalidFilter(property, token)) => (
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Some(ErrorString::Snippet(property.into())),
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Some(ErrorString::UnexpectedToken(token)),
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),
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ParseErrorKind::Custom(StyleParseErrorKind::MediaQueryExpectedFeatureName(ident)) => {
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(Some(ErrorString::Ident(ident)), None)
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},
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ParseErrorKind::Basic(BasicParseErrorKind::UnexpectedToken(token)) |
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ParseErrorKind::Custom(StyleParseErrorKind::ValueError(
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ValueParseErrorKind::InvalidColor(token),
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)) => (Some(ErrorString::UnexpectedToken(token)), None),
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ParseErrorKind::Custom(StyleParseErrorKind::SelectorError(err)) => match err {
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SelectorParseErrorKind::UnexpectedTokenInAttributeSelector(t) |
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SelectorParseErrorKind::BadValueInAttr(t) |
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SelectorParseErrorKind::ExpectedBarInAttr(t) |
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SelectorParseErrorKind::NoQualifiedNameInAttributeSelector(t) |
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SelectorParseErrorKind::InvalidQualNameInAttr(t) |
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SelectorParseErrorKind::ExplicitNamespaceUnexpectedToken(t) |
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SelectorParseErrorKind::PseudoElementExpectedIdent(t) |
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SelectorParseErrorKind::NoIdentForPseudo(t) |
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SelectorParseErrorKind::ClassNeedsIdent(t) |
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SelectorParseErrorKind::PseudoElementExpectedColon(t) => {
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(None, Some(ErrorString::UnexpectedToken(t)))
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},
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SelectorParseErrorKind::ExpectedNamespace(namespace) => {
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(None, Some(ErrorString::Ident(namespace)))
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},
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SelectorParseErrorKind::UnsupportedPseudoClassOrElement(p) => {
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(None, Some(ErrorString::Ident(p)))
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},
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SelectorParseErrorKind::EmptySelector | SelectorParseErrorKind::DanglingCombinator => {
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(None, None)
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},
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SelectorParseErrorKind::EmptyNegation => (None, Some(ErrorString::Snippet(")".into()))),
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err => match extract_error_param(ParseErrorKind::Custom(
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StyleParseErrorKind::SelectorError(err),
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)) {
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Some(e) => (Some(e), None),
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None => return None,
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},
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},
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err => match extract_error_param(err) {
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Some(e) => (Some(e), None),
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None => return None,
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},
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};
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Some(ErrorParams {
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main_param: main,
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prefix_param: prefix,
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})
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}
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impl<'a> ErrorHelpers<'a> for ContextualParseError<'a> {
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fn error_data(self) -> (CowRcStr<'a>, ErrorKind<'a>) {
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match self {
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ContextualParseError::UnsupportedPropertyDeclaration(s, err) |
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ContextualParseError::UnsupportedFontFaceDescriptor(s, err) |
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ContextualParseError::UnsupportedFontFeatureValuesDescriptor(s, err) |
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ContextualParseError::InvalidKeyframeRule(s, err) |
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ContextualParseError::InvalidFontFeatureValuesRule(s, err) |
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ContextualParseError::UnsupportedKeyframePropertyDeclaration(s, err) |
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ContextualParseError::InvalidRule(s, err) |
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ContextualParseError::UnsupportedRule(s, err) |
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ContextualParseError::UnsupportedViewportDescriptorDeclaration(s, err) |
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ContextualParseError::UnsupportedCounterStyleDescriptorDeclaration(s, err) |
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ContextualParseError::InvalidMediaRule(s, err) |
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ContextualParseError::UnsupportedValue(s, err) => (s.into(), err.kind),
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ContextualParseError::InvalidCounterStyleWithoutSymbols(s) |
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ContextualParseError::InvalidCounterStyleNotEnoughSymbols(s) => (
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s.into(),
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ParseErrorKind::Custom(StyleParseErrorKind::UnspecifiedError.into()),
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),
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ContextualParseError::InvalidCounterStyleWithoutAdditiveSymbols |
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ContextualParseError::InvalidCounterStyleExtendsWithSymbols |
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ContextualParseError::InvalidCounterStyleExtendsWithAdditiveSymbols => (
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"".into(),
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ParseErrorKind::Custom(StyleParseErrorKind::UnspecifiedError.into()),
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),
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}
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}
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fn error_params(self) -> ErrorParams<'a> {
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let (s, error) = self.error_data();
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extract_error_params(error).unwrap_or_else(|| ErrorParams {
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main_param: Some(ErrorString::Snippet(s)),
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prefix_param: None,
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})
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}
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fn to_gecko_message(&self) -> (Option<&'static CStr>, &'static CStr, Action) {
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let (msg, action): (&CStr, Action) = match *self {
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ContextualParseError::UnsupportedPropertyDeclaration(
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_,
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ParseError {
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kind: ParseErrorKind::Basic(BasicParseErrorKind::UnexpectedToken(_)),
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..
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},
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) |
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ContextualParseError::UnsupportedPropertyDeclaration(
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_,
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ParseError {
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kind: ParseErrorKind::Basic(BasicParseErrorKind::AtRuleInvalid(_)),
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..
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},
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) => (cstr!("PEParseDeclarationDeclExpected"), Action::Skip),
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ContextualParseError::UnsupportedPropertyDeclaration(
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_,
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ParseError {
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kind: ParseErrorKind::Custom(ref err),
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..
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},
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) => match *err {
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StyleParseErrorKind::InvalidColor(_, _) => {
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return (
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Some(cstr!("PEColorNotColor")),
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cstr!("PEValueParsingError"),
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Action::Drop,
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);
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},
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StyleParseErrorKind::InvalidFilter(_, _) => {
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return (
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Some(cstr!("PEExpectedNoneOrURLOrFilterFunction")),
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cstr!("PEValueParsingError"),
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Action::Drop,
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);
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},
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StyleParseErrorKind::OtherInvalidValue(_) => {
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(cstr!("PEValueParsingError"), Action::Drop)
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},
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_ => (cstr!("PEUnknownProperty"), Action::Drop),
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},
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ContextualParseError::UnsupportedPropertyDeclaration(..) => {
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(cstr!("PEUnknownProperty"), Action::Drop)
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},
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ContextualParseError::UnsupportedFontFaceDescriptor(..) => {
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(cstr!("PEUnknownFontDesc"), Action::Skip)
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},
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ContextualParseError::InvalidKeyframeRule(..) => {
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(cstr!("PEKeyframeBadName"), Action::Nothing)
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},
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ContextualParseError::UnsupportedKeyframePropertyDeclaration(..) => {
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(cstr!("PEBadSelectorKeyframeRuleIgnored"), Action::Nothing)
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},
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ContextualParseError::InvalidRule(
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_,
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ParseError {
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kind:
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ParseErrorKind::Custom(StyleParseErrorKind::UnexpectedTokenWithinNamespace(_)),
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..
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},
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) => (cstr!("PEAtNSUnexpected"), Action::Nothing),
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ContextualParseError::InvalidRule(
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_,
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ParseError {
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kind: ParseErrorKind::Basic(BasicParseErrorKind::AtRuleInvalid(_)),
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..
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},
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) |
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ContextualParseError::InvalidRule(
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_,
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ParseError {
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kind: ParseErrorKind::Custom(StyleParseErrorKind::UnsupportedAtRule(_)),
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..
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},
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) => (cstr!("PEUnknownAtRule"), Action::Nothing),
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ContextualParseError::InvalidRule(_, ref err) => {
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let prefix = match err.kind {
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ParseErrorKind::Custom(StyleParseErrorKind::SelectorError(ref err)) => {
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match *err {
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SelectorParseErrorKind::UnexpectedTokenInAttributeSelector(_) => {
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Some(cstr!("PEAttSelUnexpected"))
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},
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SelectorParseErrorKind::ExpectedBarInAttr(_) => {
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Some(cstr!("PEAttSelNoBar"))
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},
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SelectorParseErrorKind::BadValueInAttr(_) => {
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Some(cstr!("PEAttSelBadValue"))
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},
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SelectorParseErrorKind::NoQualifiedNameInAttributeSelector(_) => {
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Some(cstr!("PEAttributeNameOrNamespaceExpected"))
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},
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SelectorParseErrorKind::InvalidQualNameInAttr(_) => {
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Some(cstr!("PEAttributeNameExpected"))
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},
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SelectorParseErrorKind::ExplicitNamespaceUnexpectedToken(_) => {
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Some(cstr!("PETypeSelNotType"))
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},
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SelectorParseErrorKind::ExpectedNamespace(_) => {
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Some(cstr!("PEUnknownNamespacePrefix"))
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},
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SelectorParseErrorKind::EmptySelector => {
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Some(cstr!("PESelectorGroupNoSelector"))
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},
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SelectorParseErrorKind::DanglingCombinator => {
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Some(cstr!("PESelectorGroupExtraCombinator"))
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},
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SelectorParseErrorKind::UnsupportedPseudoClassOrElement(_) => {
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Some(cstr!("PEPseudoSelUnknown"))
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},
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SelectorParseErrorKind::PseudoElementExpectedColon(_) => {
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Some(cstr!("PEPseudoSelEndOrUserActionPC"))
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},
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SelectorParseErrorKind::NoIdentForPseudo(_) => {
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Some(cstr!("PEPseudoClassArgNotIdent"))
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},
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SelectorParseErrorKind::PseudoElementExpectedIdent(_) => {
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Some(cstr!("PEPseudoSelBadName"))
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},
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SelectorParseErrorKind::ClassNeedsIdent(_) => {
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Some(cstr!("PEClassSelNotIdent"))
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},
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SelectorParseErrorKind::EmptyNegation => {
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Some(cstr!("PENegationBadArg"))
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},
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_ => None,
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}
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},
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_ => None,
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};
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return (prefix, cstr!("PEBadSelectorRSIgnored"), Action::Nothing);
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},
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ContextualParseError::InvalidMediaRule(_, ref err) => {
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let err: &CStr = match err.kind {
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ParseErrorKind::Custom(StyleParseErrorKind::MediaQueryExpectedFeatureName(
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..
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)) => cstr!("PEMQExpectedFeatureName"),
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ParseErrorKind::Custom(StyleParseErrorKind::MediaQueryExpectedFeatureValue) => {
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cstr!("PEMQExpectedFeatureValue")
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},
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ParseErrorKind::Custom(StyleParseErrorKind::MediaQueryUnexpectedOperator) => {
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cstr!("PEMQUnexpectedOperator")
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},
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ParseErrorKind::Custom(StyleParseErrorKind::RangedExpressionWithNoValue) => {
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cstr!("PEMQNoMinMaxWithoutValue")
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},
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_ => cstr!("PEMQUnexpectedToken"),
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};
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(err, Action::Nothing)
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},
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ContextualParseError::UnsupportedRule(..) => (cstr!("PEDeclDropped"), Action::Nothing),
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ContextualParseError::UnsupportedViewportDescriptorDeclaration(..) |
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ContextualParseError::UnsupportedCounterStyleDescriptorDeclaration(..) |
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ContextualParseError::InvalidCounterStyleWithoutSymbols(..) |
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ContextualParseError::InvalidCounterStyleNotEnoughSymbols(..) |
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ContextualParseError::InvalidCounterStyleWithoutAdditiveSymbols |
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ContextualParseError::InvalidCounterStyleExtendsWithSymbols |
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ContextualParseError::InvalidCounterStyleExtendsWithAdditiveSymbols |
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ContextualParseError::UnsupportedFontFeatureValuesDescriptor(..) |
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ContextualParseError::InvalidFontFeatureValuesRule(..) => {
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(cstr!("PEUnknownAtRule"), Action::Skip)
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},
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ContextualParseError::UnsupportedValue(_, ParseError { ref kind, .. }) => {
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match *kind {
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ParseErrorKind::Custom(StyleParseErrorKind::ValueError(
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ValueParseErrorKind::InvalidColor(..),
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)) => (cstr!("PEColorNotColor"), Action::Nothing),
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_ => {
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// Not the best error message, since we weren't parsing
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// a declaration, just a value. But we don't produce
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// UnsupportedValue errors other than InvalidColors
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// currently.
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debug_assert!(false, "should use a more specific error message");
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(cstr!("PEDeclDropped"), Action::Nothing)
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},
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}
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},
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};
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(None, msg, action)
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}
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}
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impl ErrorReporter {
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fn reporting_enabled(sheet: *const DomStyleSheet, loader: *const Loader) -> bool {
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unsafe { bindings::Gecko_ErrorReportingEnabled(sheet, loader) }
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}
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pub fn report(&self, location: SourceLocation, error: ContextualParseError) {
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debug_assert!(Self::reporting_enabled(self.sheet, self.loader));
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let (pre, name, action) = error.to_gecko_message();
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let suffix = match action {
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Action::Nothing => ptr::null(),
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Action::Skip => cstr!("PEDeclSkipped").as_ptr(),
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Action::Drop => cstr!("PEDeclDropped").as_ptr(),
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};
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let params = error.error_params();
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let param = params.main_param;
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let pre_param = params.prefix_param;
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let param = param.map(|p| p.into_str());
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let pre_param = pre_param.map(|p| p.into_str());
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let param_ptr = param.as_ref().map_or(ptr::null(), |p| p.as_ptr());
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let pre_param_ptr = pre_param.as_ref().map_or(ptr::null(), |p| p.as_ptr());
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// The CSS source text is unused and will be removed in bug 1381188.
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let source = "";
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unsafe {
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bindings::Gecko_ReportUnexpectedCSSError(
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self.sheet,
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self.loader,
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self.uri,
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name.as_ptr() as *const _,
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param_ptr as *const _,
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param.as_ref().map_or(0, |p| p.len()) as u32,
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pre.map_or(ptr::null(), |p| p.as_ptr()) as *const _,
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pre_param_ptr as *const _,
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pre_param.as_ref().map_or(0, |p| p.len()) as u32,
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suffix as *const _,
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source.as_ptr() as *const _,
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source.len() as u32,
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location.line,
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location.column,
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);
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}
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}
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}
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impl ParseErrorReporter for ErrorReporter {
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fn report_error(
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&self,
|
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_url: &UrlExtraData,
|
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location: SourceLocation,
|
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error: ContextualParseError,
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) {
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self.report(location, error)
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}
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}
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