diff options
Diffstat (limited to 'rsvg_internals/src/cond.rs')
| -rw-r--r-- | rsvg_internals/src/cond.rs | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/rsvg_internals/src/cond.rs b/rsvg_internals/src/cond.rs new file mode 100644 index 00000000..f9c4d315 --- /dev/null +++ b/rsvg_internals/src/cond.rs @@ -0,0 +1,224 @@ +use glib; +use glib_sys; +use libc; + +use error::*; +use parsers::Parse; +use std::marker::PhantomData; +use util::utf8_cstr; + +use self::glib::translate::*; + +// No extensions at the moment. +static IMPLEMENTED_EXTENSIONS: &[&str] = &[]; + +#[derive(Debug, PartialEq)] +struct RequiredExtensions(bool); + +impl Parse for RequiredExtensions { + type Data = (); + type Err = AttributeError; + + // Parse a requiredExtensions attribute + // http://www.w3.org/TR/SVG/struct.html#RequiredExtensionsAttribute + fn parse(s: &str, _: ()) -> Result<RequiredExtensions, AttributeError> { + Ok(RequiredExtensions( + s.split_whitespace() + .all(|f| IMPLEMENTED_EXTENSIONS.binary_search(&f).is_ok()), + )) + } +} + +// Keep these sorted alphabetically for binary_search. +static IMPLEMENTED_FEATURES: &[&str] = &[ + "http://www.w3.org/TR/SVG11/feature#BasicFilter", + "http://www.w3.org/TR/SVG11/feature#BasicGraphicsAttribute", + "http://www.w3.org/TR/SVG11/feature#BasicPaintAttribute", + "http://www.w3.org/TR/SVG11/feature#BasicStructure", + "http://www.w3.org/TR/SVG11/feature#BasicText", + "http://www.w3.org/TR/SVG11/feature#ConditionalProcessing", + "http://www.w3.org/TR/SVG11/feature#ContainerAttribute", + "http://www.w3.org/TR/SVG11/feature#Filter", + "http://www.w3.org/TR/SVG11/feature#Gradient", + "http://www.w3.org/TR/SVG11/feature#Image", + "http://www.w3.org/TR/SVG11/feature#Marker", + "http://www.w3.org/TR/SVG11/feature#Mask", + "http://www.w3.org/TR/SVG11/feature#OpacityAttribute", + "http://www.w3.org/TR/SVG11/feature#Pattern", + "http://www.w3.org/TR/SVG11/feature#SVG", + "http://www.w3.org/TR/SVG11/feature#SVG-static", + "http://www.w3.org/TR/SVG11/feature#Shape", + "http://www.w3.org/TR/SVG11/feature#Structure", + "http://www.w3.org/TR/SVG11/feature#Style", + "http://www.w3.org/TR/SVG11/feature#View", + "org.w3c.svg.static", // deprecated SVG 1.0 feature string +]; + +#[derive(Debug, PartialEq)] +struct RequiredFeatures(bool); + +impl Parse for RequiredFeatures { + type Data = (); + type Err = AttributeError; + + // Parse a requiredFeatures attribute + // http://www.w3.org/TR/SVG/struct.html#RequiredFeaturesAttribute + fn parse(s: &str, _: ()) -> Result<RequiredFeatures, AttributeError> { + Ok(RequiredFeatures( + s.split_whitespace() + .all(|f| IMPLEMENTED_FEATURES.binary_search(&f).is_ok()), + )) + } +} + +#[derive(Debug, PartialEq)] +struct SystemLanguage<'a>(bool, PhantomData<&'a i8>); + +impl<'a> Parse for SystemLanguage<'a> { + type Data = &'a [String]; + type Err = AttributeError; + + // Parse a systemLanguage attribute + // http://www.w3.org/TR/SVG/struct.html#SystemLanguageAttribute + fn parse(s: &str, system_languages: &[String]) -> Result<SystemLanguage<'a>, AttributeError> { + Ok(SystemLanguage( + s.split(',') + .map(|s| s.trim()) + .filter(|s| !s.is_empty()) + .any(|l| { + system_languages.iter().any(|sl| { + if sl.eq_ignore_ascii_case(l) { + return true; + } + + if let Some(offset) = l.find('-') { + return sl.eq_ignore_ascii_case(&l[..offset]); + } + + false + }) + }), + PhantomData, + )) + } +} + +#[no_mangle] +pub extern "C" fn rsvg_cond_check_required_extensions( + raw_value: *const libc::c_char, +) -> glib_sys::gboolean { + let value = unsafe { utf8_cstr(raw_value) }; + + match RequiredExtensions::parse(value, ()) { + Ok(RequiredExtensions(res)) => res.to_glib(), + Err(_) => false.to_glib(), + } +} + +#[no_mangle] +pub extern "C" fn rsvg_cond_check_required_features( + raw_value: *const libc::c_char, +) -> glib_sys::gboolean { + let value = unsafe { utf8_cstr(raw_value) }; + + match RequiredFeatures::parse(value, ()) { + Ok(RequiredFeatures(res)) => res.to_glib(), + Err(_) => false.to_glib(), + } +} + +#[no_mangle] +pub extern "C" fn rsvg_cond_check_system_language( + raw_value: *const libc::c_char, +) -> glib_sys::gboolean { + let value = unsafe { utf8_cstr(raw_value) }; + + match SystemLanguage::parse(value, &glib::get_language_names()) { + Ok(SystemLanguage(res, _)) => res.to_glib(), + Err(_) => false.to_glib(), + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn parse_required_extensions() { + assert_eq!( + RequiredExtensions::parse("http://test.org/NotExisting/1.0", ()), + Ok(RequiredExtensions(false)) + ); + } + + #[test] + fn parse_required_features() { + assert_eq!( + RequiredFeatures::parse("http://www.w3.org/TR/SVG11/feature#NotExisting", ()), + Ok(RequiredFeatures(false)) + ); + + assert_eq!( + RequiredFeatures::parse("http://www.w3.org/TR/SVG11/feature#BasicFilter", ()), + Ok(RequiredFeatures(true)) + ); + + assert_eq!( + RequiredFeatures::parse( + "http://www.w3.org/TR/SVG11/feature#BasicFilter \ + http://www.w3.org/TR/SVG11/feature#NotExisting", + () + ), + Ok(RequiredFeatures(false)) + ); + + assert_eq!( + RequiredFeatures::parse( + "http://www.w3.org/TR/SVG11/feature#BasicFilter \ + http://www.w3.org/TR/SVG11/feature#BasicText", + () + ), + Ok(RequiredFeatures(true)) + ); + } + + #[test] + fn parse_system_language() { + let system_languages = vec![String::from("de"), String::from("en_US")]; + + assert_eq!( + SystemLanguage::parse("", &system_languages), + Ok(SystemLanguage(false, PhantomData)) + ); + + assert_eq!( + SystemLanguage::parse("fr", &system_languages), + Ok(SystemLanguage(false, PhantomData)) + ); + + assert_eq!( + SystemLanguage::parse("de", &system_languages), + Ok(SystemLanguage(true, PhantomData)) + ); + + assert_eq!( + SystemLanguage::parse("en_US", &system_languages), + Ok(SystemLanguage(true, PhantomData)) + ); + + assert_eq!( + SystemLanguage::parse("DE", &system_languages), + Ok(SystemLanguage(true, PhantomData)) + ); + + assert_eq!( + SystemLanguage::parse("de-LU", &system_languages), + Ok(SystemLanguage(true, PhantomData)) + ); + + assert_eq!( + SystemLanguage::parse("fr, de", &system_languages), + Ok(SystemLanguage(true, PhantomData)) + ); + } +} |