105 lines
3.0 KiB
Rust
105 lines
3.0 KiB
Rust
use std::borrow::Cow;
|
|
use std::collections::BTreeSet;
|
|
|
|
/// Type that holds a number of variables of type `T`
|
|
pub trait VariableHolder<T> {
|
|
fn get_variables(&self) -> BTreeSet<T>;
|
|
}
|
|
|
|
/// Type that holds a number of style variables of type `T`
|
|
pub trait StyleVariableHolder<T> {
|
|
fn get_style_variables(&self) -> BTreeSet<T>;
|
|
}
|
|
|
|
#[derive(Clone)]
|
|
pub struct TextGroup<'a> {
|
|
pub format: Vec<FormatElement<'a>>,
|
|
pub style: Vec<StyleElement<'a>>,
|
|
}
|
|
|
|
#[derive(Clone)]
|
|
pub enum FormatElement<'a> {
|
|
Text(Cow<'a, str>),
|
|
Variable(Cow<'a, str>),
|
|
TextGroup(TextGroup<'a>),
|
|
Conditional(Vec<FormatElement<'a>>),
|
|
}
|
|
|
|
#[derive(Clone)]
|
|
pub enum StyleElement<'a> {
|
|
Text(Cow<'a, str>),
|
|
Variable(Cow<'a, str>),
|
|
}
|
|
|
|
impl<'a> VariableHolder<Cow<'a, str>> for FormatElement<'a> {
|
|
fn get_variables(&self) -> BTreeSet<Cow<'a, str>> {
|
|
match self {
|
|
FormatElement::Variable(var) => {
|
|
let mut variables = BTreeSet::new();
|
|
variables.insert(var.clone());
|
|
variables
|
|
}
|
|
FormatElement::TextGroup(textgroup) => textgroup.format.get_variables(),
|
|
FormatElement::Conditional(format) => format.get_variables(),
|
|
_ => Default::default(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> VariableHolder<Cow<'a, str>> for Vec<FormatElement<'a>> {
|
|
fn get_variables(&self) -> BTreeSet<Cow<'a, str>> {
|
|
self.iter().fold(BTreeSet::new(), |mut acc, el| {
|
|
acc.extend(el.get_variables());
|
|
acc
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a> VariableHolder<Cow<'a, str>> for &[FormatElement<'a>] {
|
|
fn get_variables(&self) -> BTreeSet<Cow<'a, str>> {
|
|
self.iter().fold(BTreeSet::new(), |mut acc, el| {
|
|
acc.extend(el.get_variables());
|
|
acc
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a> StyleVariableHolder<Cow<'a, str>> for StyleElement<'a> {
|
|
fn get_style_variables(&self) -> BTreeSet<Cow<'a, str>> {
|
|
match self {
|
|
StyleElement::Variable(var) => {
|
|
let mut variables = BTreeSet::new();
|
|
variables.insert(var.clone());
|
|
variables
|
|
}
|
|
_ => Default::default(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> StyleVariableHolder<Cow<'a, str>> for Vec<StyleElement<'a>> {
|
|
fn get_style_variables(&self) -> BTreeSet<Cow<'a, str>> {
|
|
self.iter().fold(BTreeSet::new(), |mut acc, el| {
|
|
acc.extend(el.get_style_variables());
|
|
acc
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a> StyleVariableHolder<Cow<'a, str>> for Vec<FormatElement<'a>> {
|
|
fn get_style_variables(&self) -> BTreeSet<Cow<'a, str>> {
|
|
self.iter().fold(BTreeSet::new(), |mut acc, el| match el {
|
|
FormatElement::TextGroup(textgroup) => {
|
|
acc.extend(textgroup.style.get_style_variables());
|
|
acc.extend(textgroup.format.get_style_variables());
|
|
acc
|
|
}
|
|
FormatElement::Conditional(format) => {
|
|
acc.extend(format.get_style_variables());
|
|
acc
|
|
}
|
|
_ => acc,
|
|
})
|
|
}
|
|
}
|