mirror of
https://github.com/slint-ui/slint.git
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853 lines
30 KiB
Rust
853 lines
30 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint-ui.com>
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// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial
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use std::borrow::Cow;
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use std::collections::{BTreeMap, HashMap, HashSet};
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use std::fmt::Display;
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use std::rc::Rc;
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use itertools::Itertools;
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use crate::expression_tree::{BuiltinFunction, Expression, Unit};
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use crate::object_tree::{Component, PropertyVisibility};
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use crate::parser::syntax_nodes;
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use crate::typeregister::TypeRegister;
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#[derive(Debug, Clone, Default)]
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pub enum Type {
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/// Correspond to an uninitialized type, or an error
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#[default]
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Invalid,
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/// The type of an expression that return nothing
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Void,
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/// The type of a property two way binding whose type was not yet inferred
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InferredProperty,
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/// The type of a callback alias whose type was not yet inferred
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InferredCallback,
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Callback {
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return_type: Option<Box<Type>>,
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args: Vec<Type>,
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},
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Function {
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return_type: Box<Type>,
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args: Vec<Type>,
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},
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// Other property types:
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Float32,
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Int32,
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String,
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Color,
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Duration,
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PhysicalLength,
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LogicalLength,
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Rem,
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Angle,
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Percent,
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Image,
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Bool,
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Model,
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PathData, // Either a vector of path elements or a two vectors of events and coordinates
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Easing,
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Brush,
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/// This is usually a model
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Array(Box<Type>),
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Struct {
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fields: BTreeMap<String, Type>,
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/// When declared in .slint as `struct Foo := { }`, then the name is "Foo"
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/// When there is no node, but there is a name, then it is a builtin type
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name: Option<String>,
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/// When declared in .slint, this is the node of the declaration.
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node: Option<syntax_nodes::ObjectType>,
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},
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Enumeration(Rc<Enumeration>),
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/// A type made up of the product of several "unit" types.
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/// The first parameter is the unit, and the second parameter is the power.
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/// The vector should be sorted by 1) the power, 2) the unit.
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UnitProduct(Vec<(Unit, i8)>),
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ElementReference,
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/// This is a `SharedArray<f32>`
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LayoutCache,
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}
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impl core::cmp::PartialEq for Type {
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fn eq(&self, other: &Self) -> bool {
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match self {
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Type::Invalid => matches!(other, Type::Invalid),
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Type::Void => matches!(other, Type::Void),
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Type::InferredProperty => matches!(other, Type::InferredProperty),
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Type::InferredCallback => matches!(other, Type::InferredCallback),
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Type::Callback { args: a, return_type: ra } => {
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matches!(other, Type::Callback { args: b, return_type: rb } if a == b && ra == rb)
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}
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Type::Function { return_type: lhs_rt, args: lhs_args } => {
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matches!(other, Type::Function { return_type: rhs_rt, args: rhs_args } if lhs_rt == rhs_rt && lhs_args == rhs_args)
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}
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Type::Float32 => matches!(other, Type::Float32),
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Type::Int32 => matches!(other, Type::Int32),
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Type::String => matches!(other, Type::String),
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Type::Color => matches!(other, Type::Color),
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Type::Duration => matches!(other, Type::Duration),
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Type::Angle => matches!(other, Type::Angle),
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Type::PhysicalLength => matches!(other, Type::PhysicalLength),
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Type::LogicalLength => matches!(other, Type::LogicalLength),
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Type::Rem => matches!(other, Type::Rem),
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Type::Percent => matches!(other, Type::Percent),
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Type::Image => matches!(other, Type::Image),
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Type::Bool => matches!(other, Type::Bool),
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Type::Model => matches!(other, Type::Model),
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Type::PathData => matches!(other, Type::PathData),
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Type::Easing => matches!(other, Type::Easing),
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Type::Brush => matches!(other, Type::Brush),
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Type::Array(a) => matches!(other, Type::Array(b) if a == b),
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Type::Struct { fields, name, node: _ } => {
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matches!(other, Type::Struct{fields: f, name: n, node: _} if fields == f && name == n)
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}
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Type::Enumeration(lhs) => matches!(other, Type::Enumeration(rhs) if lhs == rhs),
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Type::UnitProduct(a) => matches!(other, Type::UnitProduct(b) if a == b),
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Type::ElementReference => matches!(other, Type::ElementReference),
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Type::LayoutCache => matches!(other, Type::LayoutCache),
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}
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}
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}
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impl Display for Type {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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Type::Invalid => write!(f, "<error>"),
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Type::Void => write!(f, "void"),
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Type::InferredProperty => write!(f, "?"),
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Type::InferredCallback => write!(f, "callback"),
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Type::Callback { args, return_type } => {
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write!(f, "callback")?;
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if !args.is_empty() {
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write!(f, "(")?;
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for (i, arg) in args.iter().enumerate() {
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if i > 0 {
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write!(f, ",")?;
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}
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write!(f, "{}", arg)?;
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}
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write!(f, ")")?
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}
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if let Some(rt) = return_type {
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write!(f, "-> {}", rt)?;
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}
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Ok(())
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}
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Type::Function { return_type, args } => {
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write!(f, "function(")?;
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for (i, arg) in args.iter().enumerate() {
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if i > 0 {
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write!(f, ",")?;
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}
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write!(f, "{}", arg)?;
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}
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write!(f, ") -> {}", return_type)
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}
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Type::Float32 => write!(f, "float"),
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Type::Int32 => write!(f, "int"),
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Type::String => write!(f, "string"),
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Type::Duration => write!(f, "duration"),
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Type::Angle => write!(f, "angle"),
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Type::PhysicalLength => write!(f, "physical-length"),
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Type::LogicalLength => write!(f, "length"),
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Type::Rem => write!(f, "relative-font-size"),
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Type::Percent => write!(f, "percent"),
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Type::Color => write!(f, "color"),
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Type::Image => write!(f, "image"),
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Type::Bool => write!(f, "bool"),
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Type::Model => write!(f, "model"),
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Type::Array(t) => write!(f, "[{}]", t),
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Type::Struct { name: Some(name), .. } => write!(f, "{}", name),
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Type::Struct { fields, name: None, .. } => {
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write!(f, "{{ ")?;
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for (k, v) in fields {
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write!(f, "{}: {},", k, v)?;
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}
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write!(f, "}}")
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}
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Type::PathData => write!(f, "pathdata"),
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Type::Easing => write!(f, "easing"),
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Type::Brush => write!(f, "brush"),
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Type::Enumeration(enumeration) => write!(f, "enum {}", enumeration.name),
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Type::UnitProduct(vec) => {
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const POWERS: &[char] = &['⁰', '¹', '²', '³', '⁴', '⁵', '⁶', '⁷', '⁸', '⁹'];
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let mut x = vec.iter().map(|(unit, power)| {
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if *power == 1 {
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return unit.to_string();
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}
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let mut res = format!("{}{}", unit, if *power < 0 { "⁻" } else { "" });
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let value = power.abs().to_string();
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for x in value.as_bytes() {
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res.push(POWERS[(x - b'0') as usize]);
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}
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res
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});
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write!(f, "({})", x.join("×"))
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}
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Type::ElementReference => write!(f, "element ref"),
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Type::LayoutCache => write!(f, "layout cache"),
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}
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}
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}
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impl Type {
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/// valid type for properties
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pub fn is_property_type(&self) -> bool {
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matches!(
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self,
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Self::Float32
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| Self::Int32
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| Self::String
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| Self::Color
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| Self::Duration
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| Self::Angle
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| Self::PhysicalLength
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| Self::LogicalLength
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| Self::Rem
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| Self::Percent
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| Self::Image
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| Self::Bool
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| Self::Model
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| Self::Easing
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| Self::Enumeration(_)
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| Self::ElementReference
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| Self::Struct { .. }
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| Self::Array(_)
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| Self::Brush
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| Self::InferredProperty
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)
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}
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pub fn ok_for_public_api(&self) -> bool {
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!matches!(self, Self::Easing)
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}
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/// Assume it is an enumeration, panic if it isn't
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pub fn as_enum(&self) -> &Rc<Enumeration> {
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match self {
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Type::Enumeration(e) => e,
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_ => panic!("should be an enumeration, bug in compiler pass"),
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}
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}
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/// Return true if the type can be converted to the other type
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pub fn can_convert(&self, other: &Self) -> bool {
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let can_convert_struct = |a: &BTreeMap<String, Type>, b: &BTreeMap<String, Type>| {
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// the struct `b` has property that the struct `a` doesn't
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let mut has_more_property = false;
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for (k, v) in b {
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match a.get(k) {
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Some(t) if !t.can_convert(v) => return false,
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None => has_more_property = true,
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_ => (),
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}
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}
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if has_more_property {
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// we should reject the conversion if `a` has property that `b` doesn't have
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if a.keys().any(|k| !b.contains_key(k)) {
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return false;
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}
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}
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true
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};
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match (self, other) {
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(a, b) if a == b => true,
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(_, Type::Invalid)
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| (_, Type::Void)
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| (Type::Float32, Type::Int32)
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| (Type::Float32, Type::String)
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| (Type::Int32, Type::Float32)
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| (Type::Int32, Type::String)
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| (Type::Array(_), Type::Model)
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| (Type::Float32, Type::Model)
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| (Type::Int32, Type::Model)
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| (Type::PhysicalLength, Type::LogicalLength)
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| (Type::LogicalLength, Type::PhysicalLength)
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| (Type::Rem, Type::LogicalLength)
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| (Type::Rem, Type::PhysicalLength)
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| (Type::LogicalLength, Type::Rem)
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| (Type::PhysicalLength, Type::Rem)
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| (Type::Percent, Type::Float32)
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| (Type::Brush, Type::Color)
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| (Type::Color, Type::Brush) => true,
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(Type::Struct { fields: a, .. }, Type::Struct { fields: b, .. }) => {
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can_convert_struct(a, b)
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}
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(Type::UnitProduct(u), o) => match o.as_unit_product() {
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Some(o) => unit_product_length_conversion(u.as_slice(), o.as_slice()).is_some(),
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None => false,
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},
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(o, Type::UnitProduct(u)) => match o.as_unit_product() {
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Some(o) => unit_product_length_conversion(u.as_slice(), o.as_slice()).is_some(),
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None => false,
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},
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_ => false,
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}
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}
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/// If this is a number type which should be used with an unit, this returns the default unit
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/// otherwise, returns None
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pub fn default_unit(&self) -> Option<Unit> {
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match self {
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Type::Duration => Some(Unit::Ms),
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Type::PhysicalLength => Some(Unit::Phx),
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Type::LogicalLength => Some(Unit::Px),
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Type::Rem => Some(Unit::Rem),
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// Unit::Percent is special that it does not combine with other units like
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Type::Percent => None,
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Type::Angle => Some(Unit::Deg),
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Type::Invalid => None,
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Type::Void => None,
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Type::InferredProperty | Type::InferredCallback => None,
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Type::Callback { .. } => None,
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Type::Function { .. } => None,
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Type::Float32 => None,
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Type::Int32 => None,
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Type::String => None,
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Type::Color => None,
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Type::Image => None,
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Type::Bool => None,
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Type::Model => None,
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Type::PathData => None,
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Type::Easing => None,
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Type::Brush => None,
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Type::Array(_) => None,
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Type::Struct { .. } => None,
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Type::Enumeration(_) => None,
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Type::UnitProduct(_) => None,
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Type::ElementReference => None,
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Type::LayoutCache => None,
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}
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}
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/// Return a unit product vector even for single scalar
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pub fn as_unit_product(&self) -> Option<Vec<(Unit, i8)>> {
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match self {
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Type::UnitProduct(u) => Some(u.clone()),
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Type::Float32 | Type::Int32 => Some(Vec::new()),
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_ => self.default_unit().map(|u| vec![(u, 1)]),
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}
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}
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}
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/// Information about properties in NativeClass
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#[derive(Debug, Clone)]
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pub struct BuiltinPropertyInfo {
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/// The property type
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pub ty: Type,
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/// When set, this is the initial value that we will have to set if no other binding were specified
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pub default_value: Option<Expression>,
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pub property_visibility: PropertyVisibility,
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}
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impl BuiltinPropertyInfo {
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pub fn new(ty: Type) -> Self {
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Self { ty, default_value: None, property_visibility: PropertyVisibility::InOut }
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}
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pub fn is_native_output(&self) -> bool {
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matches!(self.property_visibility, PropertyVisibility::InOut | PropertyVisibility::Output)
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}
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}
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/// The base of an element
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#[derive(Clone, Debug)]
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pub enum ElementType {
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/// The element is based of a component
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Component(Rc<Component>),
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/// The element is a builtin element
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Builtin(Rc<BuiltinElement>),
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/// The native type was resolved by the resolve_native_class pass.
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Native(Rc<NativeClass>),
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/// The base element couldn't be looked up
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Error,
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/// This should be the base type of the root element of a global component
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Global,
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}
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impl PartialEq for ElementType {
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fn eq(&self, other: &Self) -> bool {
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match (self, other) {
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(Self::Component(a), Self::Component(b)) => Rc::ptr_eq(a, b),
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(Self::Builtin(a), Self::Builtin(b)) => Rc::ptr_eq(a, b),
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(Self::Native(a), Self::Native(b)) => Rc::ptr_eq(a, b),
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(Self::Error, Self::Error) | (Self::Global, Self::Global) => true,
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_ => false,
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}
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}
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}
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impl ElementType {
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pub fn lookup_property<'a>(&self, name: &'a str) -> PropertyLookupResult<'a> {
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match self {
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Self::Component(c) => c.root_element.borrow().lookup_property(name),
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Self::Builtin(b) => {
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let resolved_name =
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if let Some(alias_name) = b.native_class.lookup_alias(name.as_ref()) {
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Cow::Owned(alias_name.to_string())
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} else {
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Cow::Borrowed(name)
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};
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match b.properties.get(resolved_name.as_ref()) {
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None => {
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if b.is_non_item_type {
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PropertyLookupResult {
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resolved_name,
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property_type: Type::Invalid,
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property_visibility: PropertyVisibility::Private,
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declared_pure: None,
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is_local_to_component: false,
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}
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} else {
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crate::typeregister::reserved_property(name)
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}
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}
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Some(p) => PropertyLookupResult {
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resolved_name,
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property_type: p.ty.clone(),
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property_visibility: p.property_visibility,
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declared_pure: None,
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is_local_to_component: false,
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},
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}
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}
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Self::Native(n) => {
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let resolved_name = if let Some(alias_name) = n.lookup_alias(name.as_ref()) {
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Cow::Owned(alias_name.to_string())
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} else {
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Cow::Borrowed(name)
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};
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let property_type =
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n.lookup_property(resolved_name.as_ref()).cloned().unwrap_or_default();
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PropertyLookupResult {
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resolved_name,
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property_type,
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property_visibility: PropertyVisibility::InOut,
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declared_pure: None,
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is_local_to_component: false,
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}
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}
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_ => PropertyLookupResult {
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resolved_name: Cow::Borrowed(name),
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property_type: Type::Invalid,
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property_visibility: PropertyVisibility::Private,
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declared_pure: None,
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is_local_to_component: false,
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},
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}
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}
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/// List of sub properties valid for the auto completion
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pub fn property_list(&self) -> Vec<(String, Type)> {
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match self {
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Self::Component(c) => {
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let mut r = c.root_element.borrow().base_type.property_list();
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r.extend(
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c.root_element
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.borrow()
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.property_declarations
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.iter()
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.map(|(k, d)| (k.clone(), d.property_type.clone())),
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);
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r
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}
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Self::Builtin(b) => {
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b.properties.iter().map(|(k, t)| (k.clone(), t.ty.clone())).collect()
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}
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Self::Native(n) => {
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n.properties.iter().map(|(k, t)| (k.clone(), t.ty.clone())).collect()
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}
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_ => Vec::new(),
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}
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}
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pub fn lookup_type_for_child_element(
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&self,
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name: &str,
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tr: &TypeRegister,
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) -> Result<ElementType, String> {
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match self {
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Self::Component(component) if component.child_insertion_point.borrow().is_none() => {
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let base_type = component.root_element.borrow().base_type.clone();
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if base_type == tr.empty_type() {
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return Err(format!("'{}' cannot have children. Only components with @children can have children", component.id));
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} else {
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return base_type.lookup_type_for_child_element(name, tr);
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}
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}
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Self::Builtin(builtin) => {
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if let Some(child_type) = builtin.additional_accepted_child_types.get(name) {
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return Ok(child_type.clone());
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}
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if builtin.disallow_global_types_as_child_elements {
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let mut valid_children: Vec<_> =
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builtin.additional_accepted_child_types.keys().cloned().collect();
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valid_children.sort();
|
||
|
||
return Err(format!(
|
||
"{} is not allowed within {}. Only {} are valid children",
|
||
name,
|
||
builtin.native_class.class_name,
|
||
valid_children.join(" ")
|
||
));
|
||
}
|
||
}
|
||
_ => {}
|
||
};
|
||
tr.lookup_element(name).and_then(|t| {
|
||
if !tr.expose_internal_types && matches!(&t, Self::Builtin(e) if e.is_internal) {
|
||
Err(format!("Unknown type {}. (The type exist as an internal type, but cannot be accessed in this scope)", name))
|
||
} else {
|
||
Ok(t)
|
||
}
|
||
}).map_err(|s| {
|
||
match tr.lookup(name) {
|
||
Type::Invalid => s,
|
||
ty => format!("'{ty}' cannot be used as an element")
|
||
}
|
||
})
|
||
}
|
||
|
||
pub fn lookup_member_function(&self, name: &str) -> Option<BuiltinFunction> {
|
||
match self {
|
||
Self::Builtin(builtin) => builtin
|
||
.member_functions
|
||
.get(name)
|
||
.cloned()
|
||
.or_else(|| crate::typeregister::reserved_member_function(name)),
|
||
Self::Component(component) => {
|
||
component.root_element.borrow().base_type.lookup_member_function(name)
|
||
}
|
||
_ => None,
|
||
}
|
||
}
|
||
|
||
pub fn collect_contextual_types(
|
||
&self,
|
||
context_restricted_types: &mut HashMap<String, HashSet<String>>,
|
||
) {
|
||
let builtin = match self {
|
||
Self::Builtin(ty) => ty,
|
||
_ => return,
|
||
};
|
||
for (accepted_child_type_name, accepted_child_type) in
|
||
builtin.additional_accepted_child_types.iter()
|
||
{
|
||
context_restricted_types
|
||
.entry(accepted_child_type_name.clone())
|
||
.or_default()
|
||
.insert(builtin.native_class.class_name.clone());
|
||
|
||
accepted_child_type.collect_contextual_types(context_restricted_types);
|
||
}
|
||
}
|
||
|
||
/// Assume this is a builtin type, panic if it isn't
|
||
pub fn as_builtin(&self) -> &BuiltinElement {
|
||
match self {
|
||
Self::Builtin(b) => b,
|
||
Self::Component(_) => panic!("This should not happen because of inlining"),
|
||
_ => panic!("invalid type"),
|
||
}
|
||
}
|
||
|
||
/// Assume this is a builtin type, panic if it isn't
|
||
pub fn as_native(&self) -> &NativeClass {
|
||
match self {
|
||
Self::Native(b) => b,
|
||
Self::Component(_) => {
|
||
panic!("This should not happen because of native class resolution")
|
||
}
|
||
_ => panic!("invalid type"),
|
||
}
|
||
}
|
||
|
||
/// Assume it is a Component, panic if it isn't
|
||
pub fn as_component(&self) -> &Rc<Component> {
|
||
match self {
|
||
Self::Component(c) => c,
|
||
_ => panic!("should be a component because of the repeater_component pass"),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl Display for ElementType {
|
||
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||
match self {
|
||
Self::Component(c) => c.id.fmt(f),
|
||
Self::Builtin(b) => b.name.fmt(f),
|
||
Self::Native(b) => b.class_name.fmt(f),
|
||
Self::Error => write!(f, "<error>"),
|
||
Self::Global => Ok(()),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl Default for ElementType {
|
||
fn default() -> Self {
|
||
Self::Error
|
||
}
|
||
}
|
||
|
||
#[derive(Debug, Clone, Default)]
|
||
pub struct NativeClass {
|
||
pub parent: Option<Rc<NativeClass>>,
|
||
pub class_name: String,
|
||
pub cpp_vtable_getter: String,
|
||
pub properties: HashMap<String, BuiltinPropertyInfo>,
|
||
pub deprecated_aliases: HashMap<String, String>,
|
||
pub cpp_type: Option<String>,
|
||
pub rust_type_constructor: Option<String>,
|
||
}
|
||
|
||
impl NativeClass {
|
||
pub fn new(class_name: &str) -> Self {
|
||
let cpp_vtable_getter = format!("SLINT_GET_ITEM_VTABLE({}VTable)", class_name);
|
||
Self {
|
||
class_name: class_name.into(),
|
||
cpp_vtable_getter,
|
||
properties: Default::default(),
|
||
..Default::default()
|
||
}
|
||
}
|
||
|
||
pub fn new_with_properties(
|
||
class_name: &str,
|
||
properties: impl IntoIterator<Item = (String, BuiltinPropertyInfo)>,
|
||
) -> Self {
|
||
let mut class = Self::new(class_name);
|
||
class.properties = properties.into_iter().collect();
|
||
class
|
||
}
|
||
|
||
pub fn property_count(&self) -> usize {
|
||
self.properties.len() + self.parent.clone().map(|p| p.property_count()).unwrap_or_default()
|
||
}
|
||
|
||
pub fn lookup_property(&self, name: &str) -> Option<&Type> {
|
||
if let Some(bty) = self.properties.get(name) {
|
||
Some(&bty.ty)
|
||
} else if let Some(parent_class) = &self.parent {
|
||
parent_class.lookup_property(name)
|
||
} else {
|
||
None
|
||
}
|
||
}
|
||
|
||
pub fn lookup_alias(&self, name: &str) -> Option<&str> {
|
||
if let Some(alias_target) = self.deprecated_aliases.get(name) {
|
||
Some(alias_target)
|
||
} else if self.properties.contains_key(name) {
|
||
None
|
||
} else if let Some(parent_class) = &self.parent {
|
||
parent_class.lookup_alias(name)
|
||
} else {
|
||
None
|
||
}
|
||
}
|
||
}
|
||
|
||
#[derive(Debug, Clone, Copy, PartialEq, Default)]
|
||
pub enum DefaultSizeBinding {
|
||
/// There should not be a default binding for the size
|
||
#[default]
|
||
None,
|
||
/// The size should default to `width:100%; height:100%`
|
||
ExpandsToParentGeometry,
|
||
/// The size should default to the item's implicit size
|
||
ImplicitSize,
|
||
}
|
||
|
||
#[derive(Debug, Clone, Default)]
|
||
pub struct BuiltinElement {
|
||
pub name: String,
|
||
pub native_class: Rc<NativeClass>,
|
||
pub properties: BTreeMap<String, BuiltinPropertyInfo>,
|
||
pub additional_accepted_child_types: HashMap<String, ElementType>,
|
||
pub disallow_global_types_as_child_elements: bool,
|
||
/// Non-item type do not have reserved properties (x/width/rowspan/...) added to them (eg: PropertyAnimation)
|
||
pub is_non_item_type: bool,
|
||
pub accepts_focus: bool,
|
||
pub member_functions: HashMap<String, BuiltinFunction>,
|
||
pub is_global: bool,
|
||
pub default_size_binding: DefaultSizeBinding,
|
||
/// When true this is an internal type not shown in the auto-completion
|
||
pub is_internal: bool,
|
||
}
|
||
|
||
impl BuiltinElement {
|
||
pub fn new(native_class: Rc<NativeClass>) -> Self {
|
||
Self { name: native_class.class_name.clone(), native_class, ..Default::default() }
|
||
}
|
||
}
|
||
|
||
#[derive(PartialEq, Debug)]
|
||
pub struct PropertyLookupResult<'a> {
|
||
pub resolved_name: std::borrow::Cow<'a, str>,
|
||
pub property_type: Type,
|
||
pub property_visibility: PropertyVisibility,
|
||
pub declared_pure: Option<bool>,
|
||
/// True if the property is part of the the current component (for visibility purposes)
|
||
pub is_local_to_component: bool,
|
||
}
|
||
|
||
impl<'a> PropertyLookupResult<'a> {
|
||
pub fn is_valid(&self) -> bool {
|
||
self.property_type != Type::Invalid
|
||
}
|
||
|
||
/// Can this property be used in an assignment
|
||
pub fn is_valid_for_assignment(&self) -> bool {
|
||
match (self.property_visibility, self.is_local_to_component) {
|
||
(PropertyVisibility::Private, false) => false,
|
||
(PropertyVisibility::Input, true) => false,
|
||
(PropertyVisibility::Output, false) => false,
|
||
_ => true,
|
||
}
|
||
}
|
||
}
|
||
|
||
#[derive(Debug, Clone)]
|
||
pub struct Enumeration {
|
||
pub name: String,
|
||
pub values: Vec<String>,
|
||
pub default_value: usize, // index in values
|
||
}
|
||
|
||
impl PartialEq for Enumeration {
|
||
fn eq(&self, other: &Self) -> bool {
|
||
self.name.eq(&other.name)
|
||
}
|
||
}
|
||
|
||
impl Enumeration {
|
||
pub fn default_value(self: Rc<Self>) -> EnumerationValue {
|
||
EnumerationValue { value: self.default_value, enumeration: self.clone() }
|
||
}
|
||
|
||
pub fn try_value_from_string(self: Rc<Self>, value: &str) -> Option<EnumerationValue> {
|
||
self.values.iter().enumerate().find_map(|(idx, name)| {
|
||
if name == value {
|
||
Some(EnumerationValue { value: idx, enumeration: self.clone() })
|
||
} else {
|
||
None
|
||
}
|
||
})
|
||
}
|
||
}
|
||
|
||
#[derive(Clone, Debug)]
|
||
pub struct EnumerationValue {
|
||
pub value: usize, // index in enumeration.values
|
||
pub enumeration: Rc<Enumeration>,
|
||
}
|
||
|
||
impl PartialEq for EnumerationValue {
|
||
fn eq(&self, other: &Self) -> bool {
|
||
Rc::ptr_eq(&self.enumeration, &other.enumeration) && self.value == other.value
|
||
}
|
||
}
|
||
|
||
impl std::fmt::Display for EnumerationValue {
|
||
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||
self.enumeration.values[self.value].fmt(f)
|
||
}
|
||
}
|
||
|
||
impl EnumerationValue {
|
||
pub fn to_pascal_case(&self) -> String {
|
||
crate::generator::to_pascal_case(&self.enumeration.values[self.value])
|
||
}
|
||
}
|
||
|
||
#[derive(Debug, PartialEq)]
|
||
pub struct LengthConversionPowers {
|
||
pub rem_to_px_power: i8,
|
||
pub px_to_phx_power: i8,
|
||
}
|
||
|
||
/// If the `Type::UnitProduct(a)` can be converted to `Type::UnitProduct(a)` by multiplying
|
||
/// by the scale factor, return that scale factor, otherwise, return None
|
||
pub fn unit_product_length_conversion(
|
||
a: &[(Unit, i8)],
|
||
b: &[(Unit, i8)],
|
||
) -> Option<LengthConversionPowers> {
|
||
let mut units = [0i8; 16];
|
||
for (u, count) in a {
|
||
units[*u as usize] += count;
|
||
}
|
||
for (u, count) in b {
|
||
units[*u as usize] -= count;
|
||
}
|
||
|
||
if units[Unit::Px as usize] + units[Unit::Phx as usize] + units[Unit::Rem as usize] != 0 {
|
||
return None;
|
||
}
|
||
|
||
if units[Unit::Rem as usize] != 0
|
||
&& units[Unit::Phx as usize] == -units[Unit::Rem as usize]
|
||
&& units[Unit::Px as usize] == 0
|
||
{
|
||
units[Unit::Px as usize] = -units[Unit::Rem as usize];
|
||
units[Unit::Phx as usize] = -units[Unit::Rem as usize];
|
||
}
|
||
|
||
let result = LengthConversionPowers {
|
||
rem_to_px_power: if units[Unit::Rem as usize] != 0 { units[Unit::Px as usize] } else { 0 },
|
||
px_to_phx_power: if units[Unit::Px as usize] != 0 { units[Unit::Phx as usize] } else { 0 },
|
||
};
|
||
|
||
units[Unit::Px as usize] = 0;
|
||
units[Unit::Phx as usize] = 0;
|
||
units[Unit::Rem as usize] = 0;
|
||
units.into_iter().all(|x| x == 0).then(|| result)
|
||
}
|
||
|
||
#[test]
|
||
fn unit_product_length_conversion_test() {
|
||
use Option::None;
|
||
use Unit::*;
|
||
assert_eq!(
|
||
unit_product_length_conversion(&[(Px, 1)], &[(Phx, 1)]),
|
||
Some(LengthConversionPowers { rem_to_px_power: 0, px_to_phx_power: -1 })
|
||
);
|
||
assert_eq!(
|
||
unit_product_length_conversion(&[(Phx, -2)], &[(Px, -2)]),
|
||
Some(LengthConversionPowers { rem_to_px_power: 0, px_to_phx_power: -2 })
|
||
);
|
||
assert_eq!(
|
||
unit_product_length_conversion(&[(Px, 1), (Phx, -2)], &[(Phx, -1)]),
|
||
Some(LengthConversionPowers { rem_to_px_power: 0, px_to_phx_power: -1 })
|
||
);
|
||
assert_eq!(
|
||
unit_product_length_conversion(
|
||
&[(Deg, 3), (Phx, 2), (Ms, -1)],
|
||
&[(Phx, 4), (Deg, 3), (Ms, -1), (Px, -2)]
|
||
),
|
||
Some(LengthConversionPowers { rem_to_px_power: 0, px_to_phx_power: -2 })
|
||
);
|
||
assert_eq!(unit_product_length_conversion(&[(Px, 1)], &[(Phx, -1)]), None);
|
||
assert_eq!(unit_product_length_conversion(&[(Deg, 1), (Phx, -2)], &[(Px, -2)]), None);
|
||
assert_eq!(unit_product_length_conversion(&[(Px, 1)], &[(Phx, -1)]), None);
|
||
|
||
assert_eq!(
|
||
unit_product_length_conversion(&[(Rem, 1)], &[(Px, 1)]),
|
||
Some(LengthConversionPowers { rem_to_px_power: -1, px_to_phx_power: 0 })
|
||
);
|
||
assert_eq!(
|
||
unit_product_length_conversion(&[(Rem, 1)], &[(Phx, 1)]),
|
||
Some(LengthConversionPowers { rem_to_px_power: -1, px_to_phx_power: -1 })
|
||
);
|
||
assert_eq!(
|
||
unit_product_length_conversion(&[(Rem, 2)], &[(Phx, 2)]),
|
||
Some(LengthConversionPowers { rem_to_px_power: -2, px_to_phx_power: -2 })
|
||
);
|
||
}
|