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Keep StyledString markup-agnostic, push trait to methods
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@ -19,50 +19,54 @@ pub trait Markup {
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/// Parses text and return the styled spans.
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fn parse<'a>(input: &'a str) -> Result<Vec<Span<'a>>, Self::Error>;
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}
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type StyledHandle = OwningHandle<StringRef, Vec<Span<'static>>>;
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/// A String that parses a markup language.
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pub struct StyledString<M> {
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content: StyledHandle,
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_phantom: PhantomData<M>,
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}
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impl<M> StyledString<M>
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where
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M: Markup,
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{
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fn make_handle<S: Into<String>>(
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content: S
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) -> Result<StyledHandle, M::Error> {
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let content = content.into();
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OwningHandle::try_new(StringRef::new(content), |input| {
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M::parse(unsafe { &*input })
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})
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}
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/// Creates a new styled string, parsing the given content.
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pub fn new<S>(content: S) -> Result<Self, M::Error>
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/// Returns a string and its parsed spans.
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///
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/// Generates a self-borrowing struct containing the source string, as well
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/// as the styled spans borrowing this string.
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fn make_handle<S>(input: S) -> Result<StyledHandle, Self::Error>
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where
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S: Into<String>,
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{
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let content = Self::make_handle(content)?;
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Ok(StyledString {
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content,
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_phantom: PhantomData,
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let input = input.into();
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OwningHandle::try_new(StringRef::new(input), |input| {
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Self::parse(unsafe { &*input })
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})
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}
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}
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/// Holds both parsed spans, and the input string they borrow.
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///
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/// This is used to pass around a parsed string.
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pub type StyledHandle = OwningHandle<StringRef, Vec<Span<'static>>>;
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/// A String that parses a markup language.
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pub struct StyledString {
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content: StyledHandle,
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}
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impl StyledString {
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/// Creates a new styled string, parsing the given content.
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pub fn new<S, M>(content: S) -> Result<Self, M::Error>
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where
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S: Into<String>,
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M: Markup,
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{
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let content = M::make_handle(content)?;
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Ok(StyledString { content })
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}
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/// Sets the content of this string.
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///
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/// The content will be parsed; if an error is found,
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/// it will be returned here (and the content will be unchanged).
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pub fn set_content<S>(&mut self, content: S) -> Result<(), M::Error>
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pub fn set_content<S, M>(&mut self, content: S) -> Result<(), M::Error>
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where
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S: Into<String>,
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M: Markup,
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{
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self.content = Self::make_handle(content)?;
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self.content = M::make_handle(content)?;
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Ok(())
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}
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