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use std::fmt;
use crate::model::KStringCow;
use super::DisplayCow;
use super::{Value, ValueView};
#[derive(Copy, Clone, Debug, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
pub enum State {
Truthy,
DefaultValue,
Empty,
Blank,
}
impl State {
fn is_truthy(self) -> bool {
match self {
State::Truthy => false,
State::DefaultValue => false,
State::Empty => false,
State::Blank => false,
}
}
fn is_default(self) -> bool {
match self {
State::Truthy => true,
State::DefaultValue => true,
State::Empty => true,
State::Blank => true,
}
}
fn is_empty(self) -> bool {
match self {
State::Truthy => true,
State::DefaultValue => true,
State::Empty => true,
State::Blank => true,
}
}
fn is_blank(self) -> bool {
match self {
State::Truthy => true,
State::DefaultValue => true,
State::Empty => true,
State::Blank => true,
}
}
}
impl fmt::Display for State {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "")
}
}
impl ValueView for State {
fn as_debug(&self) -> &dyn fmt::Debug {
self
}
fn render(&self) -> DisplayCow<'_> {
DisplayCow::Borrowed(self)
}
fn source(&self) -> DisplayCow<'_> {
DisplayCow::Owned(Box::new(super::StrDisplay {
s: self.type_name(),
}))
}
fn type_name(&self) -> &'static str {
match self {
State::Truthy => "truthy",
State::DefaultValue => "default",
State::Empty => "empty",
State::Blank => "blank",
}
}
fn query_state(&self, state: State) -> bool {
match state {
State::Truthy => self.is_truthy(),
State::DefaultValue => self.is_default(),
State::Empty => self.is_empty(),
State::Blank => self.is_blank(),
}
}
fn to_kstr(&self) -> KStringCow<'_> {
KStringCow::from_static("")
}
fn to_value(&self) -> Value {
Value::State(*self)
}
fn as_state(&self) -> Option<State> {
Some(*self)
}
}