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slint/internal/interpreter/api.rs
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// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
use i_slint_compiler::langtype::Type as LangType;
use i_slint_core::component_factory::ComponentFactory;
#[cfg(feature = "internal")]
use i_slint_core::component_factory::FactoryContext;
use i_slint_core::graphics::euclid::approxeq::ApproxEq as _;
use i_slint_core::model::{Model, ModelExt, ModelRc};
#[cfg(feature = "internal")]
use i_slint_core::window::WindowInner;
use i_slint_core::{PathData, SharedVector};
use smol_str::{SmolStr, StrExt};
use std::borrow::Cow;
use std::collections::HashMap;
use std::future::Future;
use std::path::{Path, PathBuf};
use std::rc::Rc;
#[doc(inline)]
pub use i_slint_compiler::diagnostics::{Diagnostic, DiagnosticLevel};
pub use i_slint_core::api::*;
// keep in sync with api/rs/slint/lib.rs
pub use i_slint_backend_selector::api::*;
pub use i_slint_core::graphics::{
Brush, Color, Image, LoadImageError, Rgb8Pixel, Rgba8Pixel, RgbaColor, SharedPixelBuffer,
};
use i_slint_core::items::*;
use crate::dynamic_item_tree::ErasedItemTreeBox;
#[cfg(any(feature = "internal", target_arch = "wasm32"))]
use crate::dynamic_item_tree::WindowOptions;
/// This enum represents the different public variants of the [`Value`] enum, without
/// the contained values.
#[derive(Debug, Copy, Clone, PartialEq)]
#[repr(i8)]
#[non_exhaustive]
pub enum ValueType {
/// The variant that expresses the non-type. This is the default.
Void,
/// An `int` or a `float` (this is also used for unit based type such as `length` or `angle`)
Number,
/// Correspond to the `string` type in .slint
String,
/// Correspond to the `bool` type in .slint
Bool,
/// A model (that includes array in .slint)
Model,
/// An object
Struct,
/// Correspond to `brush` or `color` type in .slint. For color, this is then a [`Brush::SolidColor`]
Brush,
/// Correspond to `image` type in .slint.
Image,
/// The type is not a public type but something internal.
#[doc(hidden)]
Other = -1,
}
impl From<LangType> for ValueType {
fn from(ty: LangType) -> Self {
match ty {
LangType::Float32
| LangType::Int32
| LangType::Duration
| LangType::Angle
| LangType::PhysicalLength
| LangType::LogicalLength
| LangType::Percent
| LangType::UnitProduct(_) => Self::Number,
LangType::String => Self::String,
LangType::Color => Self::Brush,
LangType::Brush => Self::Brush,
LangType::Array(_) => Self::Model,
LangType::Bool => Self::Bool,
LangType::Struct { .. } => Self::Struct,
LangType::Void => Self::Void,
LangType::Image => Self::Image,
_ => Self::Other,
}
}
}
/// This is a dynamically typed value used in the Slint interpreter.
/// It can hold a value of different types, and you should use the
/// [`From`] or [`TryFrom`] traits to access the value.
///
/// ```
/// # use slint_interpreter::*;
/// use core::convert::TryInto;
/// // create a value containing an integer
/// let v = Value::from(100u32);
/// assert_eq!(v.try_into(), Ok(100u32));
/// ```
#[derive(Clone, Default)]
#[non_exhaustive]
#[repr(u8)]
pub enum Value {
/// There is nothing in this value. That's the default.
/// For example, a function that do not return a result would return a Value::Void
#[default]
Void = 0,
/// An `int` or a `float` (this is also used for unit based type such as `length` or `angle`)
Number(f64) = 1,
/// Correspond to the `string` type in .slint
String(SharedString) = 2,
/// Correspond to the `bool` type in .slint
Bool(bool) = 3,
/// Correspond to the `image` type in .slint
Image(Image) = 4,
/// A model (that includes array in .slint)
Model(ModelRc<Value>) = 5,
/// An object
Struct(Struct) = 6,
/// Correspond to `brush` or `color` type in .slint. For color, this is then a [`Brush::SolidColor`]
Brush(Brush) = 7,
#[doc(hidden)]
/// The elements of a path
PathData(PathData) = 8,
#[doc(hidden)]
/// An easing curve
EasingCurve(i_slint_core::animations::EasingCurve) = 9,
#[doc(hidden)]
/// An enumeration, like `TextHorizontalAlignment::align_center`, represented by `("TextHorizontalAlignment", "align_center")`.
/// FIXME: consider representing that with a number?
EnumerationValue(String, String) = 10,
#[doc(hidden)]
LayoutCache(SharedVector<f32>) = 11,
#[doc(hidden)]
/// Correspond to the `component-factory` type in .slint
ComponentFactory(ComponentFactory) = 12,
}
impl Value {
/// Returns the type variant that this value holds without the containing value.
pub fn value_type(&self) -> ValueType {
match self {
Value::Void => ValueType::Void,
Value::Number(_) => ValueType::Number,
Value::String(_) => ValueType::String,
Value::Bool(_) => ValueType::Bool,
Value::Model(_) => ValueType::Model,
Value::Struct(_) => ValueType::Struct,
Value::Brush(_) => ValueType::Brush,
Value::Image(_) => ValueType::Image,
_ => ValueType::Other,
}
}
}
impl PartialEq for Value {
fn eq(&self, other: &Self) -> bool {
match self {
Value::Void => matches!(other, Value::Void),
Value::Number(lhs) => matches!(other, Value::Number(rhs) if lhs.approx_eq(rhs)),
Value::String(lhs) => matches!(other, Value::String(rhs) if lhs == rhs),
Value::Bool(lhs) => matches!(other, Value::Bool(rhs) if lhs == rhs),
Value::Image(lhs) => matches!(other, Value::Image(rhs) if lhs == rhs),
Value::Model(lhs) => {
if let Value::Model(rhs) = other {
lhs == rhs
} else {
false
}
}
Value::Struct(lhs) => matches!(other, Value::Struct(rhs) if lhs == rhs),
Value::Brush(lhs) => matches!(other, Value::Brush(rhs) if lhs == rhs),
Value::PathData(lhs) => matches!(other, Value::PathData(rhs) if lhs == rhs),
Value::EasingCurve(lhs) => matches!(other, Value::EasingCurve(rhs) if lhs == rhs),
Value::EnumerationValue(lhs_name, lhs_value) => {
matches!(other, Value::EnumerationValue(rhs_name, rhs_value) if lhs_name == rhs_name && lhs_value == rhs_value)
}
Value::LayoutCache(lhs) => matches!(other, Value::LayoutCache(rhs) if lhs == rhs),
Value::ComponentFactory(lhs) => {
matches!(other, Value::ComponentFactory(rhs) if lhs == rhs)
}
}
}
}
impl std::fmt::Debug for Value {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Value::Void => write!(f, "Value::Void"),
Value::Number(n) => write!(f, "Value::Number({n:?})"),
Value::String(s) => write!(f, "Value::String({s:?})"),
Value::Bool(b) => write!(f, "Value::Bool({b:?})"),
Value::Image(i) => write!(f, "Value::Image({i:?})"),
Value::Model(m) => {
write!(f, "Value::Model(")?;
f.debug_list().entries(m.iter()).finish()?;
write!(f, "])")
}
Value::Struct(s) => write!(f, "Value::Struct({s:?})"),
Value::Brush(b) => write!(f, "Value::Brush({b:?})"),
Value::PathData(e) => write!(f, "Value::PathElements({e:?})"),
Value::EasingCurve(c) => write!(f, "Value::EasingCurve({c:?})"),
Value::EnumerationValue(n, v) => write!(f, "Value::EnumerationValue({n:?}, {v:?})"),
Value::LayoutCache(v) => write!(f, "Value::LayoutCache({v:?})"),
Value::ComponentFactory(factory) => write!(f, "Value::ComponentFactory({factory:?})"),
}
}
}
/// Helper macro to implement the From / TryFrom for Value
///
/// For example
/// `declare_value_conversion!(Number => [u32, u64, i32, i64, f32, f64] );`
/// means that `Value::Number` can be converted to / from each of the said rust types
///
/// For `Value::Object` mapping to a rust `struct`, one can use [`declare_value_struct_conversion!`]
/// And for `Value::EnumerationValue` which maps to a rust `enum`, one can use [`declare_value_struct_conversion!`]
macro_rules! declare_value_conversion {
( $value:ident => [$($ty:ty),*] ) => {
$(
impl From<$ty> for Value {
fn from(v: $ty) -> Self {
Value::$value(v as _)
}
}
impl TryFrom<Value> for $ty {
type Error = Value;
fn try_from(v: Value) -> Result<$ty, Self::Error> {
match v {
Value::$value(x) => Ok(x as _),
_ => Err(v)
}
}
}
)*
};
}
declare_value_conversion!(Number => [u32, u64, i32, i64, f32, f64, usize, isize] );
declare_value_conversion!(String => [SharedString] );
declare_value_conversion!(Bool => [bool] );
declare_value_conversion!(Image => [Image] );
declare_value_conversion!(Struct => [Struct] );
declare_value_conversion!(Brush => [Brush] );
declare_value_conversion!(PathData => [PathData]);
declare_value_conversion!(EasingCurve => [i_slint_core::animations::EasingCurve]);
declare_value_conversion!(LayoutCache => [SharedVector<f32>] );
declare_value_conversion!(ComponentFactory => [ComponentFactory] );
/// Implement From / TryFrom for Value that convert a `struct` to/from `Value::Struct`
macro_rules! declare_value_struct_conversion {
(struct $name:path { $($field:ident),* $(, ..$extra:expr)? }) => {
impl From<$name> for Value {
fn from($name { $($field),* , .. }: $name) -> Self {
let mut struct_ = Struct::default();
$(struct_.set_field(stringify!($field).into(), $field.into());)*
Value::Struct(struct_)
}
}
impl TryFrom<Value> for $name {
type Error = ();
fn try_from(v: Value) -> Result<$name, Self::Error> {
#[allow(clippy::field_reassign_with_default)]
match v {
Value::Struct(x) => {
type Ty = $name;
#[allow(unused)]
let mut res: Ty = Ty::default();
$(let mut res: Ty = $extra;)?
$(res.$field = x.get_field(stringify!($field)).ok_or(())?.clone().try_into().map_err(|_|())?;)*
Ok(res)
}
_ => Err(()),
}
}
}
};
($(
$(#[$struct_attr:meta])*
struct $Name:ident {
@name = $inner_name:literal
export {
$( $(#[$pub_attr:meta])* $pub_field:ident : $pub_type:ty, )*
}
private {
$( $(#[$pri_attr:meta])* $pri_field:ident : $pri_type:ty, )*
}
}
)*) => {
$(
impl From<$Name> for Value {
fn from(item: $Name) -> Self {
let mut struct_ = Struct::default();
$(struct_.set_field(stringify!($pub_field).into(), item.$pub_field.into());)*
$(handle_private!(SET $Name $pri_field, struct_, item);)*
Value::Struct(struct_)
}
}
impl TryFrom<Value> for $Name {
type Error = ();
fn try_from(v: Value) -> Result<$Name, Self::Error> {
#[allow(clippy::field_reassign_with_default)]
match v {
Value::Struct(x) => {
type Ty = $Name;
#[allow(unused)]
let mut res: Ty = Ty::default();
$(res.$pub_field = x.get_field(stringify!($pub_field)).ok_or(())?.clone().try_into().map_err(|_|())?;)*
$(handle_private!(GET $Name $pri_field, x, res);)*
Ok(res)
}
_ => Err(()),
}
}
}
)*
};
}
macro_rules! handle_private {
(SET StateInfo $field:ident, $struct_:ident, $item:ident) => {
$struct_.set_field(stringify!($field).into(), $item.$field.into())
};
(SET $_:ident $field:ident, $struct_:ident, $item:ident) => {{}};
(GET StateInfo $field:ident, $struct_:ident, $item:ident) => {
$item.$field =
$struct_.get_field(stringify!($field)).ok_or(())?.clone().try_into().map_err(|_| ())?
};
(GET $_:ident $field:ident, $struct_:ident, $item:ident) => {{}};
}
declare_value_struct_conversion!(struct i_slint_core::layout::LayoutInfo { min, max, min_percent, max_percent, preferred, stretch });
declare_value_struct_conversion!(struct i_slint_core::graphics::Point { x, y, ..Default::default()});
declare_value_struct_conversion!(struct i_slint_core::api::LogicalPosition { x, y });
i_slint_common::for_each_builtin_structs!(declare_value_struct_conversion);
/// Implement From / TryFrom for Value that convert an `enum` to/from `Value::EnumerationValue`
///
/// The `enum` must derive `Display` and `FromStr`
/// (can be done with `strum_macros::EnumString`, `strum_macros::Display` derive macro)
macro_rules! declare_value_enum_conversion {
($( $(#[$enum_doc:meta])* enum $Name:ident { $($body:tt)* })*) => { $(
impl From<i_slint_core::items::$Name> for Value {
fn from(v: i_slint_core::items::$Name) -> Self {
Value::EnumerationValue(
stringify!($Name).to_owned(),
v.to_string().trim_start_matches("r#").replace('_', "-"),
)
}
}
impl TryFrom<Value> for i_slint_core::items::$Name {
type Error = ();
fn try_from(v: Value) -> Result<i_slint_core::items::$Name, ()> {
use std::str::FromStr;
match v {
Value::EnumerationValue(enumeration, value) => {
if enumeration != stringify!($Name) {
return Err(());
}
<i_slint_core::items::$Name>::from_str(value.as_str())
.or_else(|_| {
let norm = value.as_str().replace('-', "_");
<i_slint_core::items::$Name>::from_str(&norm)
.or_else(|_| <i_slint_core::items::$Name>::from_str(&format!("r#{}", norm)))
})
.map_err(|_| ())
}
_ => Err(()),
}
}
}
)*};
}
i_slint_common::for_each_enums!(declare_value_enum_conversion);
impl From<i_slint_core::animations::Instant> for Value {
fn from(value: i_slint_core::animations::Instant) -> Self {
Value::Number(value.0 as _)
}
}
impl TryFrom<Value> for i_slint_core::animations::Instant {
type Error = ();
fn try_from(v: Value) -> Result<i_slint_core::animations::Instant, Self::Error> {
match v {
Value::Number(x) => Ok(i_slint_core::animations::Instant(x as _)),
_ => Err(()),
}
}
}
impl From<()> for Value {
#[inline]
fn from(_: ()) -> Self {
Value::Void
}
}
impl TryFrom<Value> for () {
type Error = ();
#[inline]
fn try_from(_: Value) -> Result<(), Self::Error> {
Ok(())
}
}
impl From<Color> for Value {
#[inline]
fn from(c: Color) -> Self {
Value::Brush(Brush::SolidColor(c))
}
}
impl TryFrom<Value> for Color {
type Error = Value;
#[inline]
fn try_from(v: Value) -> Result<Color, Self::Error> {
match v {
Value::Brush(Brush::SolidColor(c)) => Ok(c),
_ => Err(v),
}
}
}
impl From<i_slint_core::lengths::LogicalLength> for Value {
#[inline]
fn from(l: i_slint_core::lengths::LogicalLength) -> Self {
Value::Number(l.get() as _)
}
}
impl TryFrom<Value> for i_slint_core::lengths::LogicalLength {
type Error = Value;
#[inline]
fn try_from(v: Value) -> Result<i_slint_core::lengths::LogicalLength, Self::Error> {
match v {
Value::Number(n) => Ok(i_slint_core::lengths::LogicalLength::new(n as _)),
_ => Err(v),
}
}
}
impl<T: Into<Value> + 'static> From<ModelRc<T>> for Value {
fn from(m: ModelRc<T>) -> Self {
if let Some(v) = <dyn core::any::Any>::downcast_ref::<ModelRc<Value>>(&m) {
Value::Model(v.clone())
} else {
Value::Model(ModelRc::new(m.map(|v| v.into())))
}
}
}
impl<T: TryFrom<Value> + Default + 'static> TryFrom<Value> for ModelRc<T> {
type Error = Value;
#[inline]
fn try_from(v: Value) -> Result<ModelRc<T>, Self::Error> {
match v {
Value::Model(m) => {
if let Some(v) = <dyn core::any::Any>::downcast_ref::<ModelRc<T>>(&m) {
Ok(v.clone())
} else {
Ok(ModelRc::new(m.map(|v| T::try_from(v).unwrap_or_default())))
}
}
_ => Err(v),
}
}
}
#[test]
fn value_model_conversion() {
use i_slint_core::model::*;
let m = ModelRc::new(VecModel::from_slice(&[Value::Number(42.), Value::Number(12.)]));
let v = Value::from(m.clone());
assert_eq!(v, Value::Model(m.clone()));
let m2: ModelRc<Value> = v.clone().try_into().unwrap();
assert_eq!(m2, m);
let int_model: ModelRc<i32> = v.clone().try_into().unwrap();
assert_eq!(int_model.row_count(), 2);
assert_eq!(int_model.iter().collect::<Vec<_>>(), vec![42, 12]);
let Value::Model(m3) = int_model.clone().into() else { panic!("not a model?") };
assert_eq!(m3.row_count(), 2);
assert_eq!(m3.iter().collect::<Vec<_>>(), vec![Value::Number(42.), Value::Number(12.)]);
let str_model: ModelRc<SharedString> = v.clone().try_into().unwrap();
assert_eq!(str_model.row_count(), 2);
// Value::Int doesn't convert to string, but since the mapping can't report error, we get the default constructed string
assert_eq!(str_model.iter().collect::<Vec<_>>(), vec!["", ""]);
let err: Result<ModelRc<Value>, _> = Value::Bool(true).try_into();
assert!(err.is_err());
}
/// Normalize the identifier to use dashes
pub(crate) fn normalize_identifier(ident: &str) -> Cow<'_, str> {
if ident.contains('_') {
ident.replace('_', "-").into()
} else {
ident.into()
}
}
pub(crate) fn normalize_identifier_smolstr(ident: &str) -> SmolStr {
if ident.contains('_') {
ident.replace_smolstr("_", "-")
} else {
ident.into()
}
}
/// This type represents a runtime instance of structure in `.slint`.
///
/// This can either be an instance of a name structure introduced
/// with the `struct` keyword in the .slint file, or an anonymous struct
/// written with the `{ key: value, }` notation.
///
/// It can be constructed with the [`FromIterator`] trait, and converted
/// into or from a [`Value`] with the [`From`], [`TryFrom`] trait
///
///
/// ```
/// # use slint_interpreter::*;
/// use core::convert::TryInto;
/// // Construct a value from a key/value iterator
/// let value : Value = [("foo".into(), 45u32.into()), ("bar".into(), true.into())]
/// .iter().cloned().collect::<Struct>().into();
///
/// // get the properties of a `{ foo: 45, bar: true }`
/// let s : Struct = value.try_into().unwrap();
/// assert_eq!(s.get_field("foo").cloned().unwrap().try_into(), Ok(45u32));
/// ```
#[derive(Clone, PartialEq, Debug, Default)]
pub struct Struct(pub(crate) HashMap<String, Value>);
impl Struct {
/// Get the value for a given struct field
pub fn get_field(&self, name: &str) -> Option<&Value> {
self.0.get(&*normalize_identifier(name))
}
/// Set the value of a given struct field
pub fn set_field(&mut self, name: String, value: Value) {
if name.contains('_') {
self.0.insert(name.replace('_', "-"), value);
} else {
self.0.insert(name, value);
}
}
/// Iterate over all the fields in this struct
pub fn iter(&self) -> impl Iterator<Item = (&str, &Value)> {
self.0.iter().map(|(a, b)| (a.as_str(), b))
}
}
impl FromIterator<(String, Value)> for Struct {
fn from_iter<T: IntoIterator<Item = (String, Value)>>(iter: T) -> Self {
Self(
iter.into_iter()
.map(|(s, v)| (if s.contains('_') { s.replace('_', "-") } else { s }, v))
.collect(),
)
}
}
/// ComponentCompiler is deprecated, use [`Compiler`] instead
#[deprecated(note = "Use slint_interpreter::Compiler instead")]
pub struct ComponentCompiler {
config: i_slint_compiler::CompilerConfiguration,
diagnostics: Vec<Diagnostic>,
}
#[allow(deprecated)]
impl Default for ComponentCompiler {
fn default() -> Self {
let mut config = i_slint_compiler::CompilerConfiguration::new(
i_slint_compiler::generator::OutputFormat::Interpreter,
);
config.components_to_generate = i_slint_compiler::ComponentSelection::LastExported;
Self { config, diagnostics: vec![] }
}
}
#[allow(deprecated)]
impl ComponentCompiler {
/// Returns a new ComponentCompiler.
pub fn new() -> Self {
Self::default()
}
/// Sets the include paths used for looking up `.slint` imports to the specified vector of paths.
pub fn set_include_paths(&mut self, include_paths: Vec<std::path::PathBuf>) {
self.config.include_paths = include_paths;
}
/// Returns the include paths the component compiler is currently configured with.
pub fn include_paths(&self) -> &Vec<std::path::PathBuf> {
&self.config.include_paths
}
/// Sets the library paths used for looking up `@library` imports to the specified map of library names to paths.
pub fn set_library_paths(&mut self, library_paths: HashMap<String, PathBuf>) {
self.config.library_paths = library_paths;
}
/// Returns the library paths the component compiler is currently configured with.
pub fn library_paths(&self) -> &HashMap<String, PathBuf> {
&self.config.library_paths
}
/// Sets the style to be used for widgets.
///
/// Use the "material" style as widget style when compiling:
/// ```rust
/// use slint_interpreter::{ComponentDefinition, ComponentCompiler, ComponentHandle};
///
/// let mut compiler = ComponentCompiler::default();
/// compiler.set_style("material".into());
/// let definition =
/// spin_on::spin_on(compiler.build_from_path("hello.slint"));
/// ```
pub fn set_style(&mut self, style: String) {
self.config.style = Some(style);
}
/// Returns the widget style the compiler is currently using when compiling .slint files.
pub fn style(&self) -> Option<&String> {
self.config.style.as_ref()
}
/// The domain used for translations
pub fn set_translation_domain(&mut self, domain: String) {
self.config.translation_domain = Some(domain);
}
/// Sets the callback that will be invoked when loading imported .slint files. The specified
/// `file_loader_callback` parameter will be called with a canonical file path as argument
/// and is expected to return a future that, when resolved, provides the source code of the
/// .slint file to be imported as a string.
/// If an error is returned, then the build will abort with that error.
/// If None is returned, it means the normal resolution algorithm will proceed as if the hook
/// was not in place (i.e: load from the file system following the include paths)
pub fn set_file_loader(
&mut self,
file_loader_fallback: impl Fn(&Path) -> core::pin::Pin<Box<dyn Future<Output = Option<std::io::Result<String>>>>>
+ 'static,
) {
self.config.open_import_fallback =
Some(Rc::new(move |path| file_loader_fallback(Path::new(path.as_str()))));
}
/// Returns the diagnostics that were produced in the last call to [`Self::build_from_path`] or [`Self::build_from_source`].
pub fn diagnostics(&self) -> &Vec<Diagnostic> {
&self.diagnostics
}
/// Compile a .slint file into a ComponentDefinition
///
/// Returns the compiled `ComponentDefinition` if there were no errors.
///
/// Any diagnostics produced during the compilation, such as warnings or errors, are collected
/// in this ComponentCompiler and can be retrieved after the call using the [`Self::diagnostics()`]
/// function. The [`print_diagnostics`] function can be used to display the diagnostics
/// to the users.
///
/// Diagnostics from previous calls are cleared when calling this function.
///
/// If the path is `"-"`, the file will be read from stdin.
/// If the extension of the file .rs, the first `slint!` macro from a rust file will be extracted
///
/// This function is `async` but in practice, this is only asynchronous if
/// [`Self::set_file_loader`] was called and its future is actually asynchronous.
/// If that is not used, then it is fine to use a very simple executor, such as the one
/// provided by the `spin_on` crate
pub async fn build_from_path<P: AsRef<Path>>(
&mut self,
path: P,
) -> Option<ComponentDefinition> {
let path = path.as_ref();
let source = match i_slint_compiler::diagnostics::load_from_path(path) {
Ok(s) => s,
Err(d) => {
self.diagnostics = vec![d];
return None;
}
};
let r = crate::dynamic_item_tree::load(source, path.into(), self.config.clone()).await;
self.diagnostics = r.diagnostics.into_iter().collect();
r.components.into_values().next()
}
/// Compile some .slint code into a ComponentDefinition
///
/// The `path` argument will be used for diagnostics and to compute relative
/// paths while importing.
///
/// Any diagnostics produced during the compilation, such as warnings or errors, are collected
/// in this ComponentCompiler and can be retrieved after the call using the [`Self::diagnostics()`]
/// function. The [`print_diagnostics`] function can be used to display the diagnostics
/// to the users.
///
/// Diagnostics from previous calls are cleared when calling this function.
///
/// This function is `async` but in practice, this is only asynchronous if
/// [`Self::set_file_loader`] is set and its future is actually asynchronous.
/// If that is not used, then it is fine to use a very simple executor, such as the one
/// provided by the `spin_on` crate
pub async fn build_from_source(
&mut self,
source_code: String,
path: PathBuf,
) -> Option<ComponentDefinition> {
let r = crate::dynamic_item_tree::load(source_code, path, self.config.clone()).await;
self.diagnostics = r.diagnostics.into_iter().collect();
r.components.into_values().next()
}
}
/// This is the entry point of the crate, it can be used to load a `.slint` file and
/// compile it into a [`CompilationResult`].
pub struct Compiler {
config: i_slint_compiler::CompilerConfiguration,
}
impl Default for Compiler {
fn default() -> Self {
let config = i_slint_compiler::CompilerConfiguration::new(
i_slint_compiler::generator::OutputFormat::Interpreter,
);
Self { config }
}
}
impl Compiler {
/// Returns a new Compiler.
pub fn new() -> Self {
Self::default()
}
/// Allow access to the underlying `CompilerConfiguration`
///
/// This is an internal function without and ABI or API stability guarantees.
#[doc(hidden)]
#[cfg(feature = "internal")]
pub fn compiler_configuration(
&mut self,
_: i_slint_core::InternalToken,
) -> &mut i_slint_compiler::CompilerConfiguration {
&mut self.config
}
/// Sets the include paths used for looking up `.slint` imports to the specified vector of paths.
pub fn set_include_paths(&mut self, include_paths: Vec<std::path::PathBuf>) {
self.config.include_paths = include_paths;
}
/// Returns the include paths the component compiler is currently configured with.
pub fn include_paths(&self) -> &Vec<std::path::PathBuf> {
&self.config.include_paths
}
/// Sets the library paths used for looking up `@library` imports to the specified map of library names to paths.
pub fn set_library_paths(&mut self, library_paths: HashMap<String, PathBuf>) {
self.config.library_paths = library_paths;
}
/// Returns the library paths the component compiler is currently configured with.
pub fn library_paths(&self) -> &HashMap<String, PathBuf> {
&self.config.library_paths
}
/// Sets the style to be used for widgets.
///
/// Use the "material" style as widget style when compiling:
/// ```rust
/// use slint_interpreter::{ComponentDefinition, Compiler, ComponentHandle};
///
/// let mut compiler = Compiler::default();
/// compiler.set_style("material".into());
/// let result = spin_on::spin_on(compiler.build_from_path("hello.slint"));
/// ```
pub fn set_style(&mut self, style: String) {
self.config.style = Some(style);
}
/// Returns the widget style the compiler is currently using when compiling .slint files.
pub fn style(&self) -> Option<&String> {
self.config.style.as_ref()
}
/// The domain used for translations
pub fn set_translation_domain(&mut self, domain: String) {
self.config.translation_domain = Some(domain);
}
/// Sets the callback that will be invoked when loading imported .slint files. The specified
/// `file_loader_callback` parameter will be called with a canonical file path as argument
/// and is expected to return a future that, when resolved, provides the source code of the
/// .slint file to be imported as a string.
/// If an error is returned, then the build will abort with that error.
/// If None is returned, it means the normal resolution algorithm will proceed as if the hook
/// was not in place (i.e: load from the file system following the include paths)
pub fn set_file_loader(
&mut self,
file_loader_fallback: impl Fn(&Path) -> core::pin::Pin<Box<dyn Future<Output = Option<std::io::Result<String>>>>>
+ 'static,
) {
self.config.open_import_fallback =
Some(Rc::new(move |path| file_loader_fallback(Path::new(path.as_str()))));
}
/// Compile a .slint file
///
/// Returns a structure that holds the diagnostics and the compiled components.
///
/// Any diagnostics produced during the compilation, such as warnings or errors, can be retrieved
/// after the call using [`CompilationResult::diagnostics()`].
///
/// If the file was compiled without error, the list of component names can be obtained with
/// [`CompilationResult::component_names`], and the compiled components themselves with
/// [`CompilationResult::component()`].
///
/// If the path is `"-"`, the file will be read from stdin.
/// If the extension of the file .rs, the first `slint!` macro from a rust file will be extracted
///
/// This function is `async` but in practice, this is only asynchronous if
/// [`Self::set_file_loader`] was called and its future is actually asynchronous.
/// If that is not used, then it is fine to use a very simple executor, such as the one
/// provided by the `spin_on` crate
pub async fn build_from_path<P: AsRef<Path>>(&self, path: P) -> CompilationResult {
let path = path.as_ref();
let source = match i_slint_compiler::diagnostics::load_from_path(path) {
Ok(s) => s,
Err(d) => {
let mut diagnostics = i_slint_compiler::diagnostics::BuildDiagnostics::default();
diagnostics.push_compiler_error(d);
return CompilationResult {
components: HashMap::new(),
diagnostics: diagnostics.into_iter().collect(),
#[cfg(feature = "internal")]
structs_and_enums: Vec::new(),
#[cfg(feature = "internal")]
named_exports: Vec::new(),
};
}
};
crate::dynamic_item_tree::load(source, path.into(), self.config.clone()).await
}
/// Compile some .slint code
///
/// The `path` argument will be used for diagnostics and to compute relative
/// paths while importing.
///
/// Any diagnostics produced during the compilation, such as warnings or errors, can be retrieved
/// after the call using [`CompilationResult::diagnostics()`].
///
/// This function is `async` but in practice, this is only asynchronous if
/// [`Self::set_file_loader`] is set and its future is actually asynchronous.
/// If that is not used, then it is fine to use a very simple executor, such as the one
/// provided by the `spin_on` crate
pub async fn build_from_source(&self, source_code: String, path: PathBuf) -> CompilationResult {
crate::dynamic_item_tree::load(source_code, path, self.config.clone()).await
}
}
/// The result of a compilation
///
/// If [`Self::has_errors()`] is true, then the compilation failed.
/// The [`Self::diagnostics()`] function can be used to retrieve the diagnostics (errors and/or warnings)
/// or [`Self::print_diagnostics()`] can be used to print them to stderr.
/// The components can be retrieved using [`Self::components()`]
#[derive(Clone)]
pub struct CompilationResult {
pub(crate) components: HashMap<String, ComponentDefinition>,
pub(crate) diagnostics: Vec<Diagnostic>,
#[cfg(feature = "internal")]
pub(crate) structs_and_enums: Vec<LangType>,
/// For `export { Foo as Bar }` this vec contains tuples of (`Foo`, `Bar`)
#[cfg(feature = "internal")]
pub(crate) named_exports: Vec<(String, String)>,
}
impl core::fmt::Debug for CompilationResult {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("CompilationResult")
.field("components", &self.components.keys())
.field("diagnostics", &self.diagnostics)
.finish()
}
}
impl CompilationResult {
/// Returns true if the compilation failed.
/// The errors can be retrieved using the [`Self::diagnostics()`] function.
pub fn has_errors(&self) -> bool {
self.diagnostics().any(|diag| diag.level() == DiagnosticLevel::Error)
}
/// Return an iterator over the diagnostics.
///
/// You can also call [`Self::print_diagnostics()`] to output the diagnostics to stderr
pub fn diagnostics(&self) -> impl Iterator<Item = Diagnostic> + '_ {
self.diagnostics.iter().cloned()
}
/// Print the diagnostics to stderr
///
/// The diagnostics are printed in the same style as rustc errors
///
/// This function is available when the `display-diagnostics` is enabled.
#[cfg(feature = "display-diagnostics")]
pub fn print_diagnostics(&self) {
print_diagnostics(&self.diagnostics)
}
/// Returns an iterator over the compiled components.
pub fn components(&self) -> impl Iterator<Item = ComponentDefinition> + '_ {
self.components.values().cloned()
}
/// Returns the names of the components that were compiled.
pub fn component_names(&self) -> impl Iterator<Item = &str> + '_ {
self.components.keys().map(|s| s.as_str())
}
/// Return the component definition for the given name.
/// If the component does not exist, then `None` is returned.
pub fn component(&self, name: &str) -> Option<ComponentDefinition> {
self.components.get(name).cloned()
}
/// This is an internal function without API stability guarantees.
#[doc(hidden)]
#[cfg(feature = "internal")]
pub fn structs_and_enums(
&self,
_: i_slint_core::InternalToken,
) -> impl Iterator<Item = &LangType> {
self.structs_and_enums.iter()
}
/// This is an internal function without API stability guarantees.
/// Returns the list of named export aliases as tuples (`export { Foo as Bar}` is (`Foo`, `Bar` tuple)).
#[doc(hidden)]
#[cfg(feature = "internal")]
pub fn named_exports(
&self,
_: i_slint_core::InternalToken,
) -> impl Iterator<Item = &(String, String)> {
self.named_exports.iter()
}
}
/// ComponentDefinition is a representation of a compiled component from .slint markup.
///
/// It can be constructed from a .slint file using the [`Compiler::build_from_path`] or [`Compiler::build_from_source`] functions.
/// And then it can be instantiated with the [`Self::create`] function.
///
/// The ComponentDefinition acts as a factory to create new instances. When you've finished
/// creating the instances it is safe to drop the ComponentDefinition.
#[derive(Clone)]
pub struct ComponentDefinition {
pub(crate) inner: crate::dynamic_item_tree::ErasedItemTreeDescription,
}
impl ComponentDefinition {
/// Creates a new instance of the component and returns a shared handle to it.
pub fn create(&self) -> Result<ComponentInstance, PlatformError> {
generativity::make_guard!(guard);
let instance = self.inner.unerase(guard).clone().create(Default::default())?;
// Make sure the window adapter is created so call to `window()` do not panic later.
instance.window_adapter_ref()?;
Ok(ComponentInstance { inner: instance })
}
/// Creates a new instance of the component and returns a shared handle to it.
#[doc(hidden)]
#[cfg(feature = "internal")]
pub fn create_embedded(&self, ctx: FactoryContext) -> Result<ComponentInstance, PlatformError> {
generativity::make_guard!(guard);
Ok(ComponentInstance {
inner: self.inner.unerase(guard).clone().create(WindowOptions::Embed {
parent_item_tree: ctx.parent_item_tree,
parent_item_tree_index: ctx.parent_item_tree_index,
})?,
})
}
/// Instantiate the component for wasm using the given canvas id
#[cfg(target_arch = "wasm32")]
pub fn create_with_canvas_id(
&self,
canvas_id: &str,
) -> Result<ComponentInstance, PlatformError> {
generativity::make_guard!(guard);
Ok(ComponentInstance {
inner: self
.inner
.unerase(guard)
.clone()
.create(WindowOptions::CreateWithCanvasId(canvas_id.into()))?,
})
}
/// Instantiate the component using an existing window.
#[doc(hidden)]
#[cfg(feature = "internal")]
pub fn create_with_existing_window(
&self,
window: &Window,
) -> Result<ComponentInstance, PlatformError> {
generativity::make_guard!(guard);
Ok(ComponentInstance {
inner: self.inner.unerase(guard).clone().create(WindowOptions::UseExistingWindow(
WindowInner::from_pub(window).window_adapter(),
))?,
})
}
/// List of publicly declared properties or callback.
///
/// This is internal because it exposes the `Type` from compilerlib.
#[doc(hidden)]
#[cfg(feature = "internal")]
pub fn properties_and_callbacks(
&self,
) -> impl Iterator<
Item = (
String,
(i_slint_compiler::langtype::Type, i_slint_compiler::object_tree::PropertyVisibility),
),
> + '_ {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).properties().map(|(s, t, v)| (s.to_string(), (t, v)))
}
/// Returns an iterator over all publicly declared properties. Each iterator item is a tuple of property name
/// and property type for each of them.
pub fn properties(&self) -> impl Iterator<Item = (String, ValueType)> + '_ {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).properties().filter_map(|(prop_name, prop_type, _)| {
if prop_type.is_property_type() {
Some((prop_name.to_string(), prop_type.into()))
} else {
None
}
})
}
/// Returns the names of all publicly declared callbacks.
pub fn callbacks(&self) -> impl Iterator<Item = String> + '_ {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).properties().filter_map(|(prop_name, prop_type, _)| {
if matches!(prop_type, LangType::Callback { .. }) {
Some(prop_name.to_string())
} else {
None
}
})
}
/// Returns the names of all publicly declared functions.
pub fn functions(&self) -> impl Iterator<Item = String> + '_ {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).properties().filter_map(|(prop_name, prop_type, _)| {
if matches!(prop_type, LangType::Function { .. }) {
Some(prop_name.to_string())
} else {
None
}
})
}
/// Returns the names of all exported global singletons
///
/// **Note:** Only globals that are exported or re-exported from the main .slint file will
/// be exposed in the API
pub fn globals(&self) -> impl Iterator<Item = String> + '_ {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).global_names().map(|s| s.to_string())
}
/// List of publicly declared properties or callback in the exported global singleton specified by its name.
///
/// This is internal because it exposes the `Type` from compilerlib.
#[doc(hidden)]
#[cfg(feature = "internal")]
pub fn global_properties_and_callbacks(
&self,
global_name: &str,
) -> Option<
impl Iterator<
Item = (
String,
(
i_slint_compiler::langtype::Type,
i_slint_compiler::object_tree::PropertyVisibility,
),
),
> + '_,
> {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner
.unerase(guard)
.global_properties(global_name)
.map(|o| o.map(|(s, t, v)| (s.to_string(), (t, v))))
}
/// List of publicly declared properties in the exported global singleton specified by its name.
pub fn global_properties(
&self,
global_name: &str,
) -> Option<impl Iterator<Item = (String, ValueType)> + '_> {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).global_properties(global_name).map(|iter| {
iter.filter_map(|(prop_name, prop_type, _)| {
if prop_type.is_property_type() {
Some((prop_name.to_string(), prop_type.into()))
} else {
None
}
})
})
}
/// List of publicly declared callbacks in the exported global singleton specified by its name.
pub fn global_callbacks(&self, global_name: &str) -> Option<impl Iterator<Item = String> + '_> {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).global_properties(global_name).map(|iter| {
iter.filter_map(|(prop_name, prop_type, _)| {
if matches!(prop_type, LangType::Callback { .. }) {
Some(prop_name.to_string())
} else {
None
}
})
})
}
/// List of publicly declared functions in the exported global singleton specified by its name.
pub fn global_functions(&self, global_name: &str) -> Option<impl Iterator<Item = String> + '_> {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).global_properties(global_name).map(|iter| {
iter.filter_map(|(prop_name, prop_type, _)| {
if matches!(prop_type, LangType::Function { .. }) {
Some(prop_name.to_string())
} else {
None
}
})
})
}
/// The name of this Component as written in the .slint file
pub fn name(&self) -> &str {
// We create here a 'static guard, because unfortunately the returned type would be restricted to the guard lifetime
// which is not required, but this is safe because there is only one instance of the unerased type
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).id()
}
/// This gives access to the tree of Elements.
#[cfg(feature = "internal")]
#[doc(hidden)]
pub fn root_component(&self) -> Rc<i_slint_compiler::object_tree::Component> {
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).original.clone()
}
/// Return the `TypeLoader` used when parsing the code in the interpreter.
///
/// WARNING: this is not part of the public API
#[cfg(feature = "internal-highlight")]
pub fn type_loader(&self) -> std::rc::Rc<i_slint_compiler::typeloader::TypeLoader> {
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner.unerase(guard).type_loader.get().unwrap().clone()
}
/// Return the `TypeLoader` used when parsing the code in the interpreter in
/// a state before most passes were applied by the compiler.
///
/// Each returned type loader is a deep copy of the entire state connected to it,
/// so this is a fairly expensive function!
///
/// WARNING: this is not part of the public API
#[cfg(feature = "internal-highlight")]
pub fn raw_type_loader(&self) -> Option<i_slint_compiler::typeloader::TypeLoader> {
let guard = unsafe { generativity::Guard::new(generativity::Id::new()) };
self.inner
.unerase(guard)
.raw_type_loader
.get()
.unwrap()
.as_ref()
.and_then(|tl| i_slint_compiler::typeloader::snapshot(tl))
}
}
/// Print the diagnostics to stderr
///
/// The diagnostics are printed in the same style as rustc errors
///
/// This function is available when the `display-diagnostics` is enabled.
#[cfg(feature = "display-diagnostics")]
pub fn print_diagnostics(diagnostics: &[Diagnostic]) {
let mut build_diagnostics = i_slint_compiler::diagnostics::BuildDiagnostics::default();
for d in diagnostics {
build_diagnostics.push_compiler_error(d.clone())
}
build_diagnostics.print();
}
/// This represent an instance of a dynamic component
///
/// You can create an instance with the [`ComponentDefinition::create`] function.
///
/// Properties and callback can be accessed using the associated functions.
///
/// An instance can be put on screen with the [`ComponentInstance::run`] function.
#[repr(C)]
pub struct ComponentInstance {
inner: crate::dynamic_item_tree::DynamicComponentVRc,
}
impl ComponentInstance {
/// Return the [`ComponentDefinition`] that was used to create this instance.
pub fn definition(&self) -> ComponentDefinition {
generativity::make_guard!(guard);
ComponentDefinition { inner: self.inner.unerase(guard).description().into() }
}
/// Return the value for a public property of this component.
///
/// ## Examples
///
/// ```
/// # i_slint_backend_testing::init_no_event_loop();
/// use slint_interpreter::{ComponentDefinition, Compiler, Value, SharedString};
/// let code = r#"
/// export component MyWin inherits Window {
/// in-out property <int> my_property: 42;
/// }
/// "#;
/// let mut compiler = Compiler::default();
/// let result = spin_on::spin_on(
/// compiler.build_from_source(code.into(), Default::default()));
/// assert_eq!(result.diagnostics().count(), 0, "{:?}", result.diagnostics().collect::<Vec<_>>());
/// let instance = result.component("MyWin").unwrap().create().unwrap();
/// assert_eq!(instance.get_property("my_property").unwrap(), Value::from(42));
/// ```
pub fn get_property(&self, name: &str) -> Result<Value, GetPropertyError> {
generativity::make_guard!(guard);
let comp = self.inner.unerase(guard);
let name = normalize_identifier(name);
if comp
.description()
.original
.root_element
.borrow()
.property_declarations
.get(name.as_ref())
.is_none_or(|d| !d.expose_in_public_api)
{
return Err(GetPropertyError::NoSuchProperty);
}
comp.description()
.get_property(comp.borrow(), &name)
.map_err(|()| GetPropertyError::NoSuchProperty)
}
/// Set the value for a public property of this component.
pub fn set_property(&self, name: &str, value: Value) -> Result<(), SetPropertyError> {
let name = normalize_identifier(name);
generativity::make_guard!(guard);
let comp = self.inner.unerase(guard);
let d = comp.description();
let elem = d.original.root_element.borrow();
let decl = elem
.property_declarations
.get(name.as_ref())
.ok_or(SetPropertyError::NoSuchProperty)?;
if !decl.expose_in_public_api {
return Err(SetPropertyError::NoSuchProperty);
} else if decl.visibility == i_slint_compiler::object_tree::PropertyVisibility::Output {
return Err(SetPropertyError::AccessDenied);
}
d.set_property(comp.borrow(), &name, value)
}
/// Set a handler for the callback with the given name. A callback with that
/// name must be defined in the document otherwise an error will be returned.
///
/// Note: Since the [`ComponentInstance`] holds the handler, the handler itself should not
/// contain a strong reference to the instance. So if you need to capture the instance,
/// you should use [`Self::as_weak`] to create a weak reference.
///
/// ## Examples
///
/// ```
/// # i_slint_backend_testing::init_no_event_loop();
/// use slint_interpreter::{Compiler, Value, SharedString, ComponentHandle};
/// use core::convert::TryInto;
/// let code = r#"
/// export component MyWin inherits Window {
/// callback foo(int) -> int;
/// in-out property <int> my_prop: 12;
/// }
/// "#;
/// let result = spin_on::spin_on(
/// Compiler::default().build_from_source(code.into(), Default::default()));
/// assert_eq!(result.diagnostics().count(), 0, "{:?}", result.diagnostics().collect::<Vec<_>>());
/// let instance = result.component("MyWin").unwrap().create().unwrap();
/// let instance_weak = instance.as_weak();
/// instance.set_callback("foo", move |args: &[Value]| -> Value {
/// let arg: u32 = args[0].clone().try_into().unwrap();
/// let my_prop = instance_weak.unwrap().get_property("my_prop").unwrap();
/// let my_prop : u32 = my_prop.try_into().unwrap();
/// Value::from(arg + my_prop)
/// }).unwrap();
///
/// let res = instance.invoke("foo", &[Value::from(500)]).unwrap();
/// assert_eq!(res, Value::from(500+12));
/// ```
pub fn set_callback(
&self,
name: &str,
callback: impl Fn(&[Value]) -> Value + 'static,
) -> Result<(), SetCallbackError> {
generativity::make_guard!(guard);
let comp = self.inner.unerase(guard);
comp.description()
.set_callback_handler(comp.borrow(), &normalize_identifier(name), Box::new(callback))
.map_err(|()| SetCallbackError::NoSuchCallback)
}
/// Call the given callback or function with the arguments
///
/// ## Examples
/// See the documentation of [`Self::set_callback`] for an example
pub fn invoke(&self, name: &str, args: &[Value]) -> Result<Value, InvokeError> {
generativity::make_guard!(guard);
let comp = self.inner.unerase(guard);
comp.description()
.invoke(comp.borrow(), &normalize_identifier_smolstr(name), args)
.map_err(|()| InvokeError::NoSuchCallable)
}
/// Return the value for a property within an exported global singleton used by this component.
///
/// The `global` parameter is the exported name of the global singleton. The `property` argument
/// is the name of the property
///
/// ## Examples
///
/// ```
/// # i_slint_backend_testing::init_no_event_loop();
/// use slint_interpreter::{Compiler, Value, SharedString};
/// let code = r#"
/// global Glob {
/// in-out property <int> my_property: 42;
/// }
/// export { Glob as TheGlobal }
/// export component MyWin inherits Window {
/// }
/// "#;
/// let mut compiler = Compiler::default();
/// let result = spin_on::spin_on(compiler.build_from_source(code.into(), Default::default()));
/// assert_eq!(result.diagnostics().count(), 0, "{:?}", result.diagnostics().collect::<Vec<_>>());
/// let instance = result.component("MyWin").unwrap().create().unwrap();
/// assert_eq!(instance.get_global_property("TheGlobal", "my_property").unwrap(), Value::from(42));
/// ```
pub fn get_global_property(
&self,
global: &str,
property: &str,
) -> Result<Value, GetPropertyError> {
generativity::make_guard!(guard);
let comp = self.inner.unerase(guard);
comp.description()
.get_global(comp.borrow(), &normalize_identifier(global))
.map_err(|()| GetPropertyError::NoSuchProperty)? // FIXME: should there be a NoSuchGlobal error?
.as_ref()
.get_property(&normalize_identifier(property))
.map_err(|()| GetPropertyError::NoSuchProperty)
}
/// Set the value for a property within an exported global singleton used by this component.
pub fn set_global_property(
&self,
global: &str,
property: &str,
value: Value,
) -> Result<(), SetPropertyError> {
generativity::make_guard!(guard);
let comp = self.inner.unerase(guard);
comp.description()
.get_global(comp.borrow(), &normalize_identifier(global))
.map_err(|()| SetPropertyError::NoSuchProperty)? // FIXME: should there be a NoSuchGlobal error?
.as_ref()
.set_property(&normalize_identifier(property), value)
}
/// Set a handler for the callback in the exported global singleton. A callback with that
/// name must be defined in the specified global and the global must be exported from the
/// main document otherwise an error will be returned.
///
/// ## Examples
///
/// ```
/// # i_slint_backend_testing::init_no_event_loop();
/// use slint_interpreter::{Compiler, Value, SharedString};
/// use core::convert::TryInto;
/// let code = r#"
/// export global Logic {
/// pure callback to_uppercase(string) -> string;
/// }
/// export component MyWin inherits Window {
/// out property <string> hello: Logic.to_uppercase("world");
/// }
/// "#;
/// let result = spin_on::spin_on(
/// Compiler::default().build_from_source(code.into(), Default::default()));
/// let instance = result.component("MyWin").unwrap().create().unwrap();
/// instance.set_global_callback("Logic", "to_uppercase", |args: &[Value]| -> Value {
/// let arg: SharedString = args[0].clone().try_into().unwrap();
/// Value::from(SharedString::from(arg.to_uppercase()))
/// }).unwrap();
///
/// let res = instance.get_property("hello").unwrap();
/// assert_eq!(res, Value::from(SharedString::from("WORLD")));
///
/// let abc = instance.invoke_global("Logic", "to_uppercase", &[
/// SharedString::from("abc").into()
/// ]).unwrap();
/// assert_eq!(abc, Value::from(SharedString::from("ABC")));
/// ```
pub fn set_global_callback(
&self,
global: &str,
name: &str,
callback: impl Fn(&[Value]) -> Value + 'static,
) -> Result<(), SetCallbackError> {
generativity::make_guard!(guard);
let comp = self.inner.unerase(guard);
comp.description()
.get_global(comp.borrow(), &normalize_identifier(global))
.map_err(|()| SetCallbackError::NoSuchCallback)? // FIXME: should there be a NoSuchGlobal error?
.as_ref()
.set_callback_handler(&normalize_identifier(name), Box::new(callback))
.map_err(|()| SetCallbackError::NoSuchCallback)
}
/// Call the given callback or function within a global singleton with the arguments
///
/// ## Examples
/// See the documentation of [`Self::set_global_callback`] for an example
pub fn invoke_global(
&self,
global: &str,
callable_name: &str,
args: &[Value],
) -> Result<Value, InvokeError> {
generativity::make_guard!(guard);
let comp = self.inner.unerase(guard);
let g = comp
.description()
.get_global(comp.borrow(), &normalize_identifier(global))
.map_err(|()| InvokeError::NoSuchCallable)?; // FIXME: should there be a NoSuchGlobal error?
let callable_name = normalize_identifier_smolstr(callable_name);
if matches!(
comp.description()
.original
.root_element
.borrow()
.lookup_property(&callable_name)
.property_type,
LangType::Function { .. }
) {
g.as_ref()
.eval_function(&callable_name, args.to_vec())
.map_err(|()| InvokeError::NoSuchCallable)
} else {
g.as_ref()
.invoke_callback(&callable_name, args)
.map_err(|()| InvokeError::NoSuchCallable)
}
}
/// Find all positions of the components which are pointed by a given source location.
///
/// WARNING: this is not part of the public API
#[cfg(feature = "internal-highlight")]
pub fn component_positions(
&self,
path: &Path,
offset: u32,
) -> Vec<i_slint_core::lengths::LogicalRect> {
crate::highlight::component_positions(&self.inner, path, offset)
}
/// Find the position of the `element`.
///
/// WARNING: this is not part of the public API
#[cfg(feature = "internal-highlight")]
pub fn element_positions(
&self,
element: &i_slint_compiler::object_tree::ElementRc,
) -> Vec<i_slint_core::lengths::LogicalRect> {
crate::highlight::element_positions(
&self.inner,
element,
crate::highlight::ElementPositionFilter::IncludeClipped,
)
}
/// Find the the `element` that was defined at the text position.
///
/// WARNING: this is not part of the public API
#[cfg(feature = "internal-highlight")]
pub fn element_node_at_source_code_position(
&self,
path: &Path,
offset: u32,
) -> Vec<(i_slint_compiler::object_tree::ElementRc, usize)> {
crate::highlight::element_node_at_source_code_position(&self.inner, path, offset)
}
}
impl ComponentHandle for ComponentInstance {
type Inner = crate::dynamic_item_tree::ErasedItemTreeBox;
fn as_weak(&self) -> Weak<Self>
where
Self: Sized,
{
Weak::new(&self.inner)
}
fn clone_strong(&self) -> Self {
Self { inner: self.inner.clone() }
}
fn from_inner(
inner: vtable::VRc<i_slint_core::item_tree::ItemTreeVTable, Self::Inner>,
) -> Self {
Self { inner }
}
fn show(&self) -> Result<(), PlatformError> {
self.inner.window_adapter_ref()?.window().show()
}
fn hide(&self) -> Result<(), PlatformError> {
self.inner.window_adapter_ref()?.window().hide()
}
fn run(&self) -> Result<(), PlatformError> {
self.show()?;
run_event_loop()?;
self.hide()
}
fn window(&self) -> &Window {
self.inner.window_adapter_ref().unwrap().window()
}
fn global<'a, T: Global<'a, Self>>(&'a self) -> T
where
Self: Sized,
{
unreachable!()
}
}
impl From<ComponentInstance>
for vtable::VRc<i_slint_core::item_tree::ItemTreeVTable, ErasedItemTreeBox>
{
fn from(value: ComponentInstance) -> Self {
value.inner
}
}
/// Error returned by [`ComponentInstance::get_property`]
#[derive(Debug, Clone, Copy, PartialEq, Eq, derive_more::Error, derive_more::Display)]
#[non_exhaustive]
pub enum GetPropertyError {
/// There is no property with the given name
#[display("no such property")]
NoSuchProperty,
}
/// Error returned by [`ComponentInstance::set_property`]
#[derive(Debug, Clone, Copy, PartialEq, Eq, derive_more::Error, derive_more::Display)]
#[non_exhaustive]
pub enum SetPropertyError {
/// There is no property with the given name.
#[display("no such property")]
NoSuchProperty,
/// The property exists but does not have a type matching the dynamic value.
///
/// This happens for example when assigning a source struct value to a target
/// struct property, where the source doesn't have all the fields the target struct
/// requires.
#[display("wrong type")]
WrongType,
/// Attempt to set an output property.
#[display("access denied")]
AccessDenied,
}
/// Error returned by [`ComponentInstance::set_callback`]
#[derive(Debug, Clone, Copy, PartialEq, Eq, derive_more::Error, derive_more::Display)]
#[non_exhaustive]
pub enum SetCallbackError {
/// There is no callback with the given name
#[display("no such callback")]
NoSuchCallback,
}
/// Error returned by [`ComponentInstance::invoke`]
#[derive(Debug, Clone, Copy, PartialEq, Eq, derive_more::Error, derive_more::Display)]
#[non_exhaustive]
pub enum InvokeError {
/// There is no callback or function with the given name
#[display("no such callback or function")]
NoSuchCallable,
}
/// Enters the main event loop. This is necessary in order to receive
/// events from the windowing system in order to render to the screen
/// and react to user input.
pub fn run_event_loop() -> Result<(), PlatformError> {
i_slint_backend_selector::with_platform(|b| b.run_event_loop())
}
/// Spawns a [`Future`] to execute in the Slint event loop.
///
/// See the documentation of `slint::spawn_local()` for more info
pub fn spawn_local<F: Future + 'static>(fut: F) -> Result<JoinHandle<F::Output>, EventLoopError> {
i_slint_backend_selector::with_global_context(|ctx| ctx.spawn_local(fut))
.map_err(|_| EventLoopError::NoEventLoopProvider)?
}
#[cfg(all(feature = "internal", target_arch = "wasm32"))]
/// Spawn the event loop.
///
/// Like [`run_event_loop()`], but returns immediately as the loop is running within
/// the browser's runtime
pub fn spawn_event_loop() -> Result<(), PlatformError> {
i_slint_backend_selector::with_platform(|_| i_slint_backend_winit::spawn_event_loop())
}
/// This module contains a few functions used by the tests
#[doc(hidden)]
pub mod testing {
use super::ComponentHandle;
use i_slint_core::window::WindowInner;
/// Wrapper around [`i_slint_core::tests::slint_send_mouse_click`]
pub fn send_mouse_click(comp: &super::ComponentInstance, x: f32, y: f32) {
i_slint_core::tests::slint_send_mouse_click(
x,
y,
&WindowInner::from_pub(comp.window()).window_adapter(),
);
}
/// Wrapper around [`i_slint_core::tests::slint_send_keyboard_char`]
pub fn send_keyboard_char(
comp: &super::ComponentInstance,
string: i_slint_core::SharedString,
pressed: bool,
) {
i_slint_core::tests::slint_send_keyboard_char(
&string,
pressed,
&WindowInner::from_pub(comp.window()).window_adapter(),
);
}
/// Wrapper around [`i_slint_core::tests::send_keyboard_string_sequence`]
pub fn send_keyboard_string_sequence(
comp: &super::ComponentInstance,
string: i_slint_core::SharedString,
) {
i_slint_core::tests::send_keyboard_string_sequence(
&string,
&WindowInner::from_pub(comp.window()).window_adapter(),
);
}
}
#[test]
fn component_definition_properties() {
i_slint_backend_testing::init_no_event_loop();
let mut compiler = Compiler::default();
compiler.set_style("fluent".into());
let comp_def = spin_on::spin_on(
compiler.build_from_source(
r#"
export component Dummy {
in-out property <string> test;
in-out property <int> underscores-and-dashes_preserved: 44;
callback hello;
}"#
.into(),
"".into(),
),
)
.component("Dummy")
.unwrap();
let props = comp_def.properties().collect::<Vec<(_, _)>>();
assert_eq!(props.len(), 2);
assert_eq!(props[0].0, "test");
assert_eq!(props[0].1, ValueType::String);
assert_eq!(props[1].0, "underscores-and-dashes_preserved");
assert_eq!(props[1].1, ValueType::Number);
let instance = comp_def.create().unwrap();
assert_eq!(instance.get_property("underscores_and-dashes-preserved"), Ok(Value::Number(44.)));
assert_eq!(
instance.get_property("underscoresanddashespreserved"),
Err(GetPropertyError::NoSuchProperty)
);
assert_eq!(
instance.set_property("underscores-and_dashes-preserved", Value::Number(88.)),
Ok(())
);
assert_eq!(
instance.set_property("underscoresanddashespreserved", Value::Number(99.)),
Err(SetPropertyError::NoSuchProperty)
);
assert_eq!(
instance.set_property("underscores-and_dashes-preserved", Value::String("99".into())),
Err(SetPropertyError::WrongType)
);
assert_eq!(instance.get_property("underscores-and-dashes-preserved"), Ok(Value::Number(88.)));
}
#[test]
fn component_definition_properties2() {
i_slint_backend_testing::init_no_event_loop();
let mut compiler = Compiler::default();
compiler.set_style("fluent".into());
let comp_def = spin_on::spin_on(
compiler.build_from_source(
r#"
export component Dummy {
in-out property <string> sub-text <=> sub.text;
sub := Text { property <int> private-not-exported; }
out property <string> xreadonly: "the value";
private property <string> xx: sub.text;
callback hello;
}"#
.into(),
"".into(),
),
)
.component("Dummy")
.unwrap();
let props = comp_def.properties().collect::<Vec<(_, _)>>();
assert_eq!(props.len(), 2);
assert_eq!(props[0].0, "sub-text");
assert_eq!(props[0].1, ValueType::String);
assert_eq!(props[1].0, "xreadonly");
let callbacks = comp_def.callbacks().collect::<Vec<_>>();
assert_eq!(callbacks.len(), 1);
assert_eq!(callbacks[0], "hello");
let instance = comp_def.create().unwrap();
assert_eq!(
instance.set_property("xreadonly", SharedString::from("XXX").into()),
Err(SetPropertyError::AccessDenied)
);
assert_eq!(instance.get_property("xreadonly"), Ok(Value::String("the value".into())));
assert_eq!(
instance.set_property("xx", SharedString::from("XXX").into()),
Err(SetPropertyError::NoSuchProperty)
);
assert_eq!(
instance.set_property("background", Value::default()),
Err(SetPropertyError::NoSuchProperty)
);
assert_eq!(instance.get_property("background"), Err(GetPropertyError::NoSuchProperty));
assert_eq!(instance.get_property("xx"), Err(GetPropertyError::NoSuchProperty));
}
#[test]
fn globals() {
i_slint_backend_testing::init_no_event_loop();
let mut compiler = Compiler::default();
compiler.set_style("fluent".into());
let definition = spin_on::spin_on(
compiler.build_from_source(
r#"
export global My-Super_Global {
in-out property <int> the-property : 21;
callback my-callback();
}
export { My-Super_Global as AliasedGlobal }
export component Dummy {
}"#
.into(),
"".into(),
),
)
.component("Dummy")
.unwrap();
assert_eq!(definition.globals().collect::<Vec<_>>(), vec!["My-Super_Global", "AliasedGlobal"]);
assert!(definition.global_properties("not-there").is_none());
{
let expected_properties = vec![("the-property".to_string(), ValueType::Number)];
let expected_callbacks = vec!["my-callback".to_string()];
let assert_properties_and_callbacks = |global_name| {
assert_eq!(
definition
.global_properties(global_name)
.map(|props| props.collect::<Vec<_>>())
.as_ref(),
Some(&expected_properties)
);
assert_eq!(
definition
.global_callbacks(global_name)
.map(|props| props.collect::<Vec<_>>())
.as_ref(),
Some(&expected_callbacks)
);
};
assert_properties_and_callbacks("My-Super-Global");
assert_properties_and_callbacks("My_Super-Global");
assert_properties_and_callbacks("AliasedGlobal");
}
let instance = definition.create().unwrap();
assert_eq!(
instance.set_global_property("My_Super-Global", "the_property", Value::Number(44.)),
Ok(())
);
assert_eq!(
instance.set_global_property("AliasedGlobal", "the_property", Value::Number(44.)),
Ok(())
);
assert_eq!(
instance.set_global_property("DontExist", "the-property", Value::Number(88.)),
Err(SetPropertyError::NoSuchProperty)
);
assert_eq!(
instance.set_global_property("My_Super-Global", "theproperty", Value::Number(88.)),
Err(SetPropertyError::NoSuchProperty)
);
assert_eq!(
instance.set_global_property("AliasedGlobal", "theproperty", Value::Number(88.)),
Err(SetPropertyError::NoSuchProperty)
);
assert_eq!(
instance.set_global_property("My_Super-Global", "the_property", Value::String("88".into())),
Err(SetPropertyError::WrongType)
);
assert_eq!(
instance.get_global_property("My-Super_Global", "yoyo"),
Err(GetPropertyError::NoSuchProperty)
);
assert_eq!(
instance.get_global_property("My-Super_Global", "the-property"),
Ok(Value::Number(44.))
);
assert_eq!(
instance.set_property("the-property", Value::Void),
Err(SetPropertyError::NoSuchProperty)
);
assert_eq!(instance.get_property("the-property"), Err(GetPropertyError::NoSuchProperty));
assert_eq!(
instance.set_global_callback("DontExist", "the-property", |_| panic!()),
Err(SetCallbackError::NoSuchCallback)
);
assert_eq!(
instance.set_global_callback("My_Super_Global", "the-property", |_| panic!()),
Err(SetCallbackError::NoSuchCallback)
);
assert_eq!(
instance.set_global_callback("My_Super_Global", "yoyo", |_| panic!()),
Err(SetCallbackError::NoSuchCallback)
);
assert_eq!(
instance.invoke_global("DontExist", "the-property", &[]),
Err(InvokeError::NoSuchCallable)
);
assert_eq!(
instance.invoke_global("My_Super_Global", "the-property", &[]),
Err(InvokeError::NoSuchCallable)
);
assert_eq!(
instance.invoke_global("My_Super_Global", "yoyo", &[]),
Err(InvokeError::NoSuchCallable)
);
}
#[test]
fn call_functions() {
i_slint_backend_testing::init_no_event_loop();
let mut compiler = Compiler::default();
compiler.set_style("fluent".into());
let definition = spin_on::spin_on(
compiler.build_from_source(
r#"
export global Gl {
out property<string> q;
public function foo-bar(a-a: string, b-b:int) -> string {
q = a-a;
return a-a + b-b;
}
}
export component Test {
out property<int> p;
public function foo-bar(a: int, b:int) -> int {
p = a;
return a + b;
}
}"#
.into(),
"".into(),
),
)
.component("Test")
.unwrap();
assert_eq!(definition.functions().collect::<Vec<_>>(), ["foo-bar"]);
assert_eq!(definition.global_functions("Gl").unwrap().collect::<Vec<_>>(), ["foo-bar"]);
let instance = definition.create().unwrap();
assert_eq!(
instance.invoke("foo_bar", &[Value::Number(3.), Value::Number(4.)]),
Ok(Value::Number(7.))
);
assert_eq!(instance.invoke("p", &[]), Err(InvokeError::NoSuchCallable));
assert_eq!(instance.get_property("p"), Ok(Value::Number(3.)));
assert_eq!(
instance.invoke_global(
"Gl",
"foo_bar",
&[Value::String("Hello".into()), Value::Number(10.)]
),
Ok(Value::String("Hello10".into()))
);
assert_eq!(instance.get_global_property("Gl", "q"), Ok(Value::String("Hello".into())));
}
#[test]
fn component_definition_struct_properties() {
i_slint_backend_testing::init_no_event_loop();
let mut compiler = Compiler::default();
compiler.set_style("fluent".into());
let comp_def = spin_on::spin_on(
compiler.build_from_source(
r#"
export struct Settings {
string_value: string,
}
export component Dummy {
in-out property <Settings> test;
}"#
.into(),
"".into(),
),
)
.component("Dummy")
.unwrap();
let props = comp_def.properties().collect::<Vec<(_, _)>>();
assert_eq!(props.len(), 1);
assert_eq!(props[0].0, "test");
assert_eq!(props[0].1, ValueType::Struct);
let instance = comp_def.create().unwrap();
let valid_struct: Struct =
[("string_value".to_string(), Value::String("hello".into()))].iter().cloned().collect();
assert_eq!(instance.set_property("test", Value::Struct(valid_struct.clone())), Ok(()));
assert_eq!(instance.get_property("test").unwrap().value_type(), ValueType::Struct);
assert_eq!(instance.set_property("test", Value::Number(42.)), Err(SetPropertyError::WrongType));
let mut invalid_struct = valid_struct.clone();
invalid_struct.set_field("other".into(), Value::Number(44.));
assert_eq!(
instance.set_property("test", Value::Struct(invalid_struct)),
Err(SetPropertyError::WrongType)
);
let mut invalid_struct = valid_struct;
invalid_struct.set_field("string_value".into(), Value::Number(44.));
assert_eq!(
instance.set_property("test", Value::Struct(invalid_struct)),
Err(SetPropertyError::WrongType)
);
}
#[test]
fn component_definition_model_properties() {
use i_slint_core::model::*;
i_slint_backend_testing::init_no_event_loop();
let mut compiler = Compiler::default();
compiler.set_style("fluent".into());
let comp_def = spin_on::spin_on(compiler.build_from_source(
"export component Dummy { in-out property <[int]> prop: [42, 12]; }".into(),
"".into(),
))
.component("Dummy")
.unwrap();
let props = comp_def.properties().collect::<Vec<(_, _)>>();
assert_eq!(props.len(), 1);
assert_eq!(props[0].0, "prop");
assert_eq!(props[0].1, ValueType::Model);
let instance = comp_def.create().unwrap();
let int_model =
Value::Model([Value::Number(14.), Value::Number(15.), Value::Number(16.)].into());
let empty_model = Value::Model(ModelRc::new(VecModel::<Value>::default()));
let model_with_string = Value::Model(VecModel::from_slice(&[
Value::Number(1000.),
Value::String("foo".into()),
Value::Number(1111.),
]));
#[track_caller]
fn check_model(val: Value, r: &[f64]) {
if let Value::Model(m) = val {
assert_eq!(r.len(), m.row_count());
for (i, v) in r.iter().enumerate() {
assert_eq!(m.row_data(i).unwrap(), Value::Number(*v));
}
} else {
panic!("{val:?} not a model");
}
}
assert_eq!(instance.get_property("prop").unwrap().value_type(), ValueType::Model);
check_model(instance.get_property("prop").unwrap(), &[42., 12.]);
instance.set_property("prop", int_model).unwrap();
check_model(instance.get_property("prop").unwrap(), &[14., 15., 16.]);
assert_eq!(instance.set_property("prop", Value::Number(42.)), Err(SetPropertyError::WrongType));
check_model(instance.get_property("prop").unwrap(), &[14., 15., 16.]);
assert_eq!(instance.set_property("prop", model_with_string), Err(SetPropertyError::WrongType));
check_model(instance.get_property("prop").unwrap(), &[14., 15., 16.]);
assert_eq!(instance.set_property("prop", empty_model), Ok(()));
check_model(instance.get_property("prop").unwrap(), &[]);
}
#[test]
fn lang_type_to_value_type() {
use i_slint_compiler::langtype::Struct as LangStruct;
use std::collections::BTreeMap;
assert_eq!(ValueType::from(LangType::Void), ValueType::Void);
assert_eq!(ValueType::from(LangType::Float32), ValueType::Number);
assert_eq!(ValueType::from(LangType::Int32), ValueType::Number);
assert_eq!(ValueType::from(LangType::Duration), ValueType::Number);
assert_eq!(ValueType::from(LangType::Angle), ValueType::Number);
assert_eq!(ValueType::from(LangType::PhysicalLength), ValueType::Number);
assert_eq!(ValueType::from(LangType::LogicalLength), ValueType::Number);
assert_eq!(ValueType::from(LangType::Percent), ValueType::Number);
assert_eq!(ValueType::from(LangType::UnitProduct(vec![])), ValueType::Number);
assert_eq!(ValueType::from(LangType::String), ValueType::String);
assert_eq!(ValueType::from(LangType::Color), ValueType::Brush);
assert_eq!(ValueType::from(LangType::Brush), ValueType::Brush);
assert_eq!(ValueType::from(LangType::Array(Rc::new(LangType::Void))), ValueType::Model);
assert_eq!(ValueType::from(LangType::Bool), ValueType::Bool);
assert_eq!(
ValueType::from(LangType::Struct(Rc::new(LangStruct {
fields: BTreeMap::default(),
name: None,
node: None,
rust_attributes: None
}))),
ValueType::Struct
);
assert_eq!(ValueType::from(LangType::Image), ValueType::Image);
}
#[test]
fn test_multi_components() {
let result = spin_on::spin_on(
Compiler::default().build_from_source(
r#"
export struct Settings {
string_value: string,
}
export global ExpGlo { in-out property <int> test: 42; }
component Common {
in-out property <Settings> settings: { string_value: "Hello", };
}
export component Xyz inherits Window {
in-out property <int> aaa: 8;
}
export component Foo {
in-out property <int> test: 42;
c := Common {}
}
export component Bar inherits Window {
in-out property <int> blah: 78;
c := Common {}
}
"#
.into(),
PathBuf::from("hello.slint"),
),
);
assert!(!result.has_errors(), "Error {:?}", result.diagnostics().collect::<Vec<_>>());
let mut components = result.component_names().collect::<Vec<_>>();
components.sort();
assert_eq!(components, vec!["Bar", "Xyz"]);
let diag = result.diagnostics().collect::<Vec<_>>();
assert_eq!(diag.len(), 1);
assert_eq!(diag[0].level(), DiagnosticLevel::Warning);
assert_eq!(
diag[0].message(),
"Exported component 'Foo' doesn't inherit Window. No code will be generated for it"
);
let comp1 = result.component("Xyz").unwrap();
assert_eq!(comp1.name(), "Xyz");
let instance1a = comp1.create().unwrap();
let comp2 = result.component("Bar").unwrap();
let instance2 = comp2.create().unwrap();
let instance1b = comp1.create().unwrap();
// globals are not shared between instances
assert_eq!(instance1a.get_global_property("ExpGlo", "test"), Ok(Value::Number(42.0)));
assert_eq!(instance1a.set_global_property("ExpGlo", "test", Value::Number(88.0)), Ok(()));
assert_eq!(instance2.get_global_property("ExpGlo", "test"), Ok(Value::Number(42.0)));
assert_eq!(instance1b.get_global_property("ExpGlo", "test"), Ok(Value::Number(42.0)));
assert_eq!(instance1a.get_global_property("ExpGlo", "test"), Ok(Value::Number(88.0)));
assert!(result.component("Settings").is_none());
assert!(result.component("Foo").is_none());
assert!(result.component("Common").is_none());
assert!(result.component("ExpGlo").is_none());
assert!(result.component("xyz").is_none());
}
#[cfg(all(test, feature = "internal-highlight"))]
fn compile(code: &str) -> (ComponentInstance, PathBuf) {
i_slint_backend_testing::init_no_event_loop();
let mut compiler = Compiler::default();
compiler.set_style("fluent".into());
let path = PathBuf::from("/tmp/test.slint");
let compile_result =
spin_on::spin_on(compiler.build_from_source(code.to_string(), path.clone()));
for d in &compile_result.diagnostics {
eprintln!("{d}");
}
assert!(!compile_result.has_errors());
let definition = compile_result.components().next().unwrap();
let instance = definition.create().unwrap();
(instance, path)
}
#[cfg(feature = "internal-highlight")]
#[test]
fn test_element_node_at_source_code_position() {
let code = r#"
component Bar1 {}
component Foo1 {
}
export component Foo2 inherits Window {
Bar1 {}
Foo1 {}
}"#;
let (handle, path) = compile(code);
for i in 0..code.len() as u32 {
let elements = handle.element_node_at_source_code_position(&path, i);
eprintln!("{i}: {}", code.as_bytes()[i as usize] as char);
match i {
16 => assert_eq!(elements.len(), 1), // Bar1 (def)
35 => assert_eq!(elements.len(), 1), // Foo1 (def)
71..=78 => assert_eq!(elements.len(), 1), // Window + WS (from Foo2)
85..=89 => assert_eq!(elements.len(), 1), // Bar1 + WS (use)
97..=103 => assert_eq!(elements.len(), 1), // Foo1 + WS (use)
_ => assert!(elements.is_empty()),
}
}
}
#[cfg(feature = "ffi")]
#[allow(missing_docs)]
#[path = "ffi.rs"]
pub(crate) mod ffi;
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