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//! Emphasis.
use crate::xml::element::Tagged;
/// Emphasis.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Emphasis
{
/// The emphasised text.
pub text: String,
/// Emphasis role.
pub role: Role,
}
impl Emphasis
{
pub(crate) fn from_tagged_element(tagged_element: &Tagged) -> Result<Self, Error>
{
return Ok(Emphasis {
text: tagged_element
.child_elements()
.get_first_text_element()
.cloned()
.unwrap_or_default(),
role: tagged_element
.attributes()
.iter()
.find(|attr| attr.key == "role")
.map(|attr| {
let value = String::from_utf8(attr.value.clone())
.map_err(|_| Error::EmphasisRoleNotUTF8)?;
if value == "bold" {
return Ok(Role::Bold);
}
Err(Error::UnknownEmphasisRole(value))
})
.unwrap_or(Ok(Role::None))?,
});
}
}
/// [`Emphasis`] error.
#[derive(Debug, thiserror::Error)]
pub enum Error
{
/// Emphasis role is not valid UTF-8.
#[error("Emphasis role is not valid UTF-8")]
EmphasisRoleNotUTF8,
/// Unknown emphasis role.
#[error("Unknown emphasis role '{0}'")]
UnknownEmphasisRole(String),
}
/// Emphasis role.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Role
{
/// Bold.
Bold,
/// None.
None,
}
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