/
eval.rs
1153 lines (1107 loc) · 54.1 KB
/
eval.rs
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// Copyright © SixtyFPS GmbH <info@sixtyfps.io>
// SPDX-License-Identifier: (GPL-3.0-only OR LicenseRef-SixtyFPS-commercial)
use crate::api::{SetPropertyError, Struct, Value};
use crate::dynamic_component::InstanceRef;
use core::convert::TryInto;
use core::pin::Pin;
use corelib::graphics::{GradientStop, LinearGradientBrush, PathElement};
use corelib::items::{ItemRef, PropertyAnimation};
use corelib::rtti::AnimatedBindingKind;
use corelib::window::{WindowHandleAccess, WindowRc};
use corelib::{Brush, Color, PathData, SharedString, SharedVector};
use sixtyfps_compilerlib::expression_tree::{
BuiltinFunction, EasingCurve, Expression, Path as ExprPath, PathElement as ExprPathElement,
};
use sixtyfps_compilerlib::langtype::Type;
use sixtyfps_compilerlib::object_tree::ElementRc;
use sixtyfps_corelib as corelib;
use std::collections::HashMap;
use std::rc::Rc;
pub trait ErasedPropertyInfo {
fn get(&self, item: Pin<ItemRef>) -> Value;
fn set(
&self,
item: Pin<ItemRef>,
value: Value,
animation: Option<PropertyAnimation>,
) -> Result<(), ()>;
fn set_binding(
&self,
item: Pin<ItemRef>,
binding: Box<dyn Fn() -> Value>,
animation: AnimatedBindingKind,
);
fn offset(&self) -> usize;
/// Safety: Property2 must be a (pinned) pointer to a `Property<T>`
/// where T is the same T as the one represented by this property.
unsafe fn link_two_ways(&self, item: Pin<ItemRef>, property2: *const ());
}
impl<Item: vtable::HasStaticVTable<corelib::items::ItemVTable>> ErasedPropertyInfo
for &'static dyn corelib::rtti::PropertyInfo<Item, Value>
{
fn get(&self, item: Pin<ItemRef>) -> Value {
(*self).get(ItemRef::downcast_pin(item).unwrap()).unwrap()
}
fn set(
&self,
item: Pin<ItemRef>,
value: Value,
animation: Option<PropertyAnimation>,
) -> Result<(), ()> {
(*self).set(ItemRef::downcast_pin(item).unwrap(), value, animation)
}
fn set_binding(
&self,
item: Pin<ItemRef>,
binding: Box<dyn Fn() -> Value>,
animation: AnimatedBindingKind,
) {
(*self).set_binding(ItemRef::downcast_pin(item).unwrap(), binding, animation).unwrap();
}
fn offset(&self) -> usize {
(*self).offset()
}
unsafe fn link_two_ways(&self, item: Pin<ItemRef>, property2: *const ()) {
// Safety: ErasedPropertyInfo::link_two_ways and PropertyInfo::link_two_ways have the same safety requirement
(*self).link_two_ways(ItemRef::downcast_pin(item).unwrap(), property2)
}
}
pub trait ErasedCallbackInfo {
fn call(&self, item: Pin<ItemRef>, args: &[Value]) -> Value;
fn set_handler(&self, item: Pin<ItemRef>, handler: Box<dyn Fn(&[Value]) -> Value>);
}
impl<Item: vtable::HasStaticVTable<corelib::items::ItemVTable>> ErasedCallbackInfo
for &'static dyn corelib::rtti::CallbackInfo<Item, Value>
{
fn call(&self, item: Pin<ItemRef>, args: &[Value]) -> Value {
(*self).call(ItemRef::downcast_pin(item).unwrap(), args).unwrap()
}
fn set_handler(&self, item: Pin<ItemRef>, handler: Box<dyn Fn(&[Value]) -> Value>) {
(*self).set_handler(ItemRef::downcast_pin(item).unwrap(), handler).unwrap()
}
}
impl corelib::rtti::ValueType for Value {}
#[derive(Copy, Clone)]
pub(crate) enum ComponentInstance<'a, 'id> {
InstanceRef(InstanceRef<'a, 'id>),
GlobalComponent(&'a Pin<Rc<dyn crate::global_component::GlobalComponent>>),
}
/// The local variable needed for binding evaluation
pub struct EvalLocalContext<'a, 'id> {
local_variables: HashMap<String, Value>,
function_arguments: Vec<Value>,
pub(crate) component_instance: ComponentInstance<'a, 'id>,
/// When Some, a return statement was executed and one must stop evaluating
return_value: Option<Value>,
}
impl<'a, 'id> EvalLocalContext<'a, 'id> {
pub fn from_component_instance(component: InstanceRef<'a, 'id>) -> Self {
Self {
local_variables: Default::default(),
function_arguments: Default::default(),
component_instance: ComponentInstance::InstanceRef(component),
return_value: None,
}
}
/// Create a context for a function and passing the arguments
pub fn from_function_arguments(
component: InstanceRef<'a, 'id>,
function_arguments: Vec<Value>,
) -> Self {
Self {
component_instance: ComponentInstance::InstanceRef(component),
function_arguments,
local_variables: Default::default(),
return_value: None,
}
}
}
/// Evaluate an expression and return a Value as the result of this expression
pub fn eval_expression(expression: &Expression, local_context: &mut EvalLocalContext) -> Value {
if let Some(r) = &local_context.return_value {
return r.clone();
}
match expression {
Expression::Invalid => panic!("invalid expression while evaluating"),
Expression::Uncompiled(_) => panic!("uncompiled expression while evaluating"),
Expression::StringLiteral(s) => Value::String(s.into()),
Expression::NumberLiteral(n, unit) => Value::Number(unit.normalize(*n)),
Expression::BoolLiteral(b) => Value::Bool(*b),
Expression::CallbackReference { .. } => panic!("callback in expression"),
Expression::BuiltinFunctionReference(..) => panic!(
"naked builtin function reference not allowed, should be handled by function call"
),
Expression::ElementReference(_) => todo!("Element references are only supported in the context of built-in function calls at the moment"),
Expression::MemberFunction { .. } => panic!("member function expressions must not appear in the code generator anymore"),
Expression::BuiltinMacroReference { .. } => panic!("macro expressions must not appear in the code generator anymore"),
Expression::PropertyReference(nr) => {
load_property_helper(local_context.component_instance, &nr.element(), nr.name()).unwrap()
}
Expression::RepeaterIndexReference { element } => load_property_helper(local_context.component_instance,
&element.upgrade().unwrap().borrow().base_type.as_component().root_element,
"index",
)
.unwrap(),
Expression::RepeaterModelReference { element } => load_property_helper(local_context.component_instance,
&element.upgrade().unwrap().borrow().base_type.as_component().root_element,
"model_data",
)
.unwrap(),
Expression::FunctionParameterReference { index, .. } => {
local_context.function_arguments[*index].clone()
}
Expression::StructFieldAccess { base, name } => {
if let Value::Struct(o) = eval_expression(base, local_context) {
o.get_field(name).cloned().unwrap_or(Value::Void)
} else {
Value::Void
}
}
Expression::Cast { from, to } => {
let v = eval_expression(&*from, local_context);
match (v, to) {
(Value::Number(n), Type::Int32) => Value::Number(n.round()),
(Value::Number(n), Type::String) => {
Value::String(SharedString::from(format!("{}", n).as_str()))
}
(Value::Number(n), Type::Color) => Color::from_argb_encoded(n as u32).into(),
(Value::Brush(brush), Type::Color) => brush.color().into(),
(v, _) => v,
}
}
Expression::CodeBlock(sub) => {
let mut v = Value::Void;
for e in sub {
v = eval_expression(e, local_context);
if let Some(r) = &local_context.return_value {
return r.clone();
}
}
v
}
Expression::FunctionCall { function, arguments, source_location: _ } => match &**function {
Expression::CallbackReference(nr) => {
let args = arguments.iter().map(|e| eval_expression(e, local_context)).collect::<Vec<_>>();
invoke_callback(local_context.component_instance, &nr.element(), nr.name(), &args).unwrap()
}
Expression::BuiltinFunctionReference(BuiltinFunction::GetWindowScaleFactor, _) => {
match local_context.component_instance {
ComponentInstance::InstanceRef(component) => Value::Number(window_ref(component).unwrap().scale_factor() as _),
ComponentInstance::GlobalComponent(_) => panic!("Cannot get the window from a global component"),
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::Debug, _) => {
let to_print: SharedString = eval_expression(&arguments[0], local_context).try_into().unwrap();
corelib::debug_log!("{}", to_print);
Value::Void
}
Expression::BuiltinFunctionReference(BuiltinFunction::Mod, _) => {
let mut to_int = |e| -> i32 { eval_expression(e, local_context).try_into().unwrap() };
Value::Number((to_int(&arguments[0]) % to_int(&arguments[1])) as _)
}
Expression::BuiltinFunctionReference(BuiltinFunction::Round, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.round())
}
Expression::BuiltinFunctionReference(BuiltinFunction::Ceil, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.ceil())
}
Expression::BuiltinFunctionReference(BuiltinFunction::Floor, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.floor())
}
Expression::BuiltinFunctionReference(BuiltinFunction::Sqrt, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.sqrt())
}
Expression::BuiltinFunctionReference(BuiltinFunction::Abs, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.abs())
}
Expression::BuiltinFunctionReference(BuiltinFunction::Sin, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.to_radians().sin())
}
Expression::BuiltinFunctionReference(BuiltinFunction::Cos, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.to_radians().cos())
}
Expression::BuiltinFunctionReference(BuiltinFunction::Tan, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.to_radians().tan())
}
Expression::BuiltinFunctionReference(BuiltinFunction::ASin, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.asin().to_degrees())
}
Expression::BuiltinFunctionReference(BuiltinFunction::ACos, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.acos().to_degrees())
}
Expression::BuiltinFunctionReference(BuiltinFunction::ATan, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
Value::Number(x.atan().to_degrees())
}
Expression::BuiltinFunctionReference(BuiltinFunction::Log, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
let y: f64 = eval_expression(&arguments[1], local_context).try_into().unwrap();
Value::Number(x.log(y))
}
Expression::BuiltinFunctionReference(BuiltinFunction::Pow, _) => {
let x: f64 = eval_expression(&arguments[0], local_context).try_into().unwrap();
let y: f64 = eval_expression(&arguments[1], local_context).try_into().unwrap();
Value::Number(x.powf(y))
}
Expression::BuiltinFunctionReference(BuiltinFunction::SetFocusItem, _) => {
if arguments.len() != 1 {
panic!("internal error: incorrect argument count to SetFocusItem")
}
let component = match local_context.component_instance {
ComponentInstance::InstanceRef(c) => c,
ComponentInstance::GlobalComponent(_) => panic!("Cannot access the focus item from a global component")
};
if let Expression::ElementReference(focus_item) = &arguments[0] {
generativity::make_guard!(guard);
let focus_item = focus_item.upgrade().unwrap();
let enclosing_component =
enclosing_component_for_element(&focus_item, component, guard);
let component_type = enclosing_component.component_type;
let item_info = &component_type.items[focus_item.borrow().id.as_str()];
let focus_item_comp = enclosing_component.self_weak().get().unwrap().upgrade().unwrap();
window_ref(component).unwrap().clone().set_focus_item(&corelib::items::ItemRc::new(vtable::VRc::into_dyn(focus_item_comp), item_info.item_index()));
Value::Void
} else {
panic!("internal error: argument to SetFocusItem must be an element")
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::ShowPopupWindow, _) => {
if arguments.len() != 1 {
panic!("internal error: incorrect argument count to ShowPopupWindow")
}
let component = match local_context.component_instance {
ComponentInstance::InstanceRef(c) => c,
ComponentInstance::GlobalComponent(_) => panic!("Cannot show popup from a global component")
};
if let Expression::ElementReference(popup_window) = &arguments[0] {
let popup_window = popup_window.upgrade().unwrap();
let pop_comp = popup_window.borrow().enclosing_component.upgrade().unwrap();
let parent_component = pop_comp.parent_element.upgrade().unwrap().borrow().enclosing_component.upgrade().unwrap();
let popup_list = parent_component.popup_windows.borrow();
let popup = popup_list.iter().find(|p| Rc::ptr_eq(&p.component, &pop_comp)).unwrap();
let x = load_property_helper(local_context.component_instance, &popup.x.element(), popup.x.name()).unwrap();
let y = load_property_helper(local_context.component_instance, &popup.y.element(), popup.y.name()).unwrap();
generativity::make_guard!(guard);
let enclosing_component =
enclosing_component_for_element(&popup.parent_element, component, guard);
let parent_item_info = &enclosing_component.component_type.items[popup.parent_element.borrow().id.as_str()];
let parent_item_comp = enclosing_component.self_weak().get().unwrap().upgrade().unwrap();
let parent_item = corelib::items::ItemRc::new(vtable::VRc::into_dyn(parent_item_comp), parent_item_info.item_index());
crate::dynamic_component::show_popup(
popup,
sixtyfps_corelib::graphics::Point::new(x.try_into().unwrap(), y.try_into().unwrap()),
component.borrow(),
window_ref(component).unwrap(),
&parent_item);
Value::Void
} else {
panic!("internal error: argument to SetFocusItem must be an element")
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::StringIsFloat, _) => {
if arguments.len() != 1 {
panic!("internal error: incorrect argument count to StringIsFloat")
}
if let Value::String(s) = eval_expression(&arguments[0], local_context) {
Value::Bool(<f64 as core::str::FromStr>::from_str(s.as_str()).is_ok())
} else {
panic!("Argument not a string");
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::StringToFloat, _) => {
if arguments.len() != 1 {
panic!("internal error: incorrect argument count to StringToFloat")
}
if let Value::String(s) = eval_expression(&arguments[0], local_context) {
Value::Number(core::str::FromStr::from_str(s.as_str()).unwrap_or(0.))
} else {
panic!("Argument not a string");
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::ColorBrighter, _) => {
if arguments.len() != 2 {
panic!("internal error: incorrect argument count to ColorBrighter")
}
if let Value::Brush(Brush::SolidColor(col)) = eval_expression(&arguments[0], local_context) {
if let Value::Number(factor) = eval_expression(&arguments[1], local_context) {
col.brighter(factor as _).into()
} else {
panic!("Second argument not a number");
}
} else {
panic!("First argument not a color");
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::ColorDarker, _) => {
if arguments.len() != 2 {
panic!("internal error: incorrect argument count to ColorDarker")
}
if let Value::Brush(Brush::SolidColor(col)) = eval_expression(&arguments[0], local_context) {
if let Value::Number(factor) = eval_expression(&arguments[1], local_context) {
col.darker(factor as _).into()
} else {
panic!("Second argument not a number");
}
} else {
panic!("First argument not a color");
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::ImageSize, _) => {
if arguments.len() != 1 {
panic!("internal error: incorrect argument count to ImageSize")
}
if let Value::Image(img) = eval_expression(&arguments[0], local_context) {
let size = img.size();
let values = IntoIterator::into_iter([
("width".to_string(), Value::Number(size.width as f64)),
("height".to_string(), Value::Number(size.height as f64)),
]).collect();
Value::Struct(values)
} else {
panic!("First argument not an image");
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::ArrayLength, _) => {
if arguments.len() != 1 {
panic!("internal error: incorrect argument count to ArrayLength")
}
match eval_expression(&arguments[0], local_context) {
Value::Array(array) => {
Value::Number(array.len() as f64)
}
Value::Model(model) => {
model.model_tracker().track_row_count_changes();
Value::Number(model.row_count() as f64)
}
_ => {
panic!("First argument not an array");
}
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::Rgb, _) => {
let r: i32 = eval_expression(&arguments[0], local_context).try_into().unwrap();
let g: i32 = eval_expression(&arguments[1], local_context).try_into().unwrap();
let b: i32 = eval_expression(&arguments[2], local_context).try_into().unwrap();
let a: f32 = eval_expression(&arguments[3], local_context).try_into().unwrap();
let r: u8 = r.max(0).min(255) as u8;
let g: u8 = g.max(0).min(255) as u8;
let b: u8 = b.max(0).min(255) as u8;
let a: u8 = (255. * a).max(0.).min(255.) as u8;
Value::Brush(Brush::SolidColor(Color::from_argb_u8(a, r, g, b)))
}
Expression::BuiltinFunctionReference(BuiltinFunction::ImplicitLayoutInfo(orient), _) => {
let component = match local_context.component_instance {
ComponentInstance::InstanceRef(c) => c,
ComponentInstance::GlobalComponent(_) => panic!("Cannot access the implicit item size from a global component")
};
if let [Expression::ElementReference(item)] = arguments.as_slice() {
generativity::make_guard!(guard);
let item = item.upgrade().unwrap();
let enclosing_component =
enclosing_component_for_element(&item, component, guard);
let component_type = enclosing_component.component_type;
let item_info = &component_type.items[item.borrow().id.as_str()];
let item_ref = unsafe { item_info.item_from_component(enclosing_component.as_ptr()) };
let window = window_ref(component).unwrap();
item_ref.as_ref().layout_info(crate::eval_layout::to_runtime(*orient), window).into()
} else {
panic!("internal error: incorrect arguments to ImplicitLayoutInfo {:?}", arguments);
}
}
Expression::BuiltinFunctionReference(BuiltinFunction::RegisterCustomFontByPath, _) => {
if arguments.len() != 1 {
panic!("internal error: incorrect argument count to RegisterCustomFontByPath")
}
if let Value::String(s) = eval_expression(&arguments[0], local_context) {
if let Some(err) = crate::register_font_from_path(&std::path::PathBuf::from(s.as_str())).err() {
corelib::debug_log!("Error loading custom font {}: {}", s.as_str(), err);
}
Value::Void
} else {
panic!("Argument not a string");
}
}
_ => panic!("call of something not a callback"),
}
Expression::SelfAssignment { lhs, rhs, op } => {
let rhs = eval_expression(&**rhs, local_context);
eval_assignment(lhs, *op, rhs, local_context);
Value::Void
}
Expression::BinaryExpression { lhs, rhs, op } => {
let lhs = eval_expression(&**lhs, local_context);
let rhs = eval_expression(&**rhs, local_context);
match (op, lhs, rhs) {
('+', Value::String(mut a), Value::String(b)) => { a.push_str(b.as_str()); Value::String(a) },
('+', Value::Number(a), Value::Number(b)) => Value::Number(a + b),
('+', a @ Value::Struct(_), b @ Value::Struct(_)) => {
let a : Option<corelib::layout::LayoutInfo> = a.try_into().ok();
let b : Option<corelib::layout::LayoutInfo> = b.try_into().ok();
if let (Some(a), Some(b)) = (a, b) {
a.merge(&b).into()
} else {
panic!("unsupported {:?} {} {:?}", a, op, b);
}
}
('-', Value::Number(a), Value::Number(b)) => Value::Number(a - b),
('/', Value::Number(a), Value::Number(b)) => Value::Number(a / b),
('*', Value::Number(a), Value::Number(b)) => Value::Number(a * b),
('<', Value::Number(a), Value::Number(b)) => Value::Bool(a < b),
('>', Value::Number(a), Value::Number(b)) => Value::Bool(a > b),
('≤', Value::Number(a), Value::Number(b)) => Value::Bool(a <= b),
('≥', Value::Number(a), Value::Number(b)) => Value::Bool(a >= b),
('<', Value::String(a), Value::String(b)) => Value::Bool(a < b),
('>', Value::String(a), Value::String(b)) => Value::Bool(a > b),
('≤', Value::String(a), Value::String(b)) => Value::Bool(a <= b),
('≥', Value::String(a), Value::String(b)) => Value::Bool(a >= b),
('=', a, b) => Value::Bool(a == b),
('!', a, b) => Value::Bool(a != b),
('&', Value::Bool(a), Value::Bool(b)) => Value::Bool(a && b),
('|', Value::Bool(a), Value::Bool(b)) => Value::Bool(a || b),
(op, lhs, rhs) => panic!("unsupported {:?} {} {:?}", lhs, op, rhs),
}
}
Expression::UnaryOp { sub, op } => {
let sub = eval_expression(&**sub, local_context);
match (sub, op) {
(Value::Number(a), '+') => Value::Number(a),
(Value::Number(a), '-') => Value::Number(-a),
(Value::Bool(a), '!') => Value::Bool(!a),
(sub, op) => panic!("unsupported {} {:?}", op, sub),
}
}
Expression::ImageReference{ resource_ref, .. } => {
Value::Image(match resource_ref {
sixtyfps_compilerlib::expression_tree::ImageReference::None => {
Ok(Default::default())
}
sixtyfps_compilerlib::expression_tree::ImageReference::AbsolutePath(path) => {
corelib::graphics::Image::load_from_path(std::path::Path::new(path))
}
sixtyfps_compilerlib::expression_tree::ImageReference::EmbeddedData { resource_id, extension } => {
let toplevel_instance = match local_context.component_instance {
ComponentInstance::InstanceRef(instance) => instance.toplevel_instance(),
ComponentInstance::GlobalComponent(_) => unimplemented!(),
};
let extra_data = toplevel_instance.component_type.extra_data_offset.apply(toplevel_instance.as_ref());
let path = extra_data.embedded_file_resources.get(resource_id).expect("internal error: invalid resource id");
let virtual_file = sixtyfps_compilerlib::fileaccess::load_file(std::path::Path::new(path)).unwrap(); // embedding pass ensured that the file exists
if let (std::borrow::Cow::Borrowed(static_path), Some(static_data)) = (virtual_file.path, virtual_file.builtin_contents) {
let virtual_file_extension = std::path::Path::new(static_path).extension().unwrap().to_str().unwrap();
debug_assert_eq!(virtual_file_extension, extension);
Ok(corelib::graphics::Image::from(
corelib::graphics::ImageInner::EmbeddedData {
data: corelib::slice::Slice::from_slice(static_data),
format: corelib::slice::Slice::from_slice(virtual_file_extension.as_bytes())
}
))
} else {
corelib::debug_log!("Cannot embed images from disk {}", path);
Ok(corelib::graphics::Image::default())
}
}
sixtyfps_compilerlib::expression_tree::ImageReference::EmbeddedTexture { .. } => {
todo!()
}
}.unwrap_or_else(|_| {
eprintln!("Could not load image {:?}",resource_ref );
Default::default()
}))
}
Expression::Condition { condition, true_expr, false_expr } => {
match eval_expression(&**condition, local_context).try_into()
as Result<bool, _>
{
Ok(true) => eval_expression(&**true_expr, local_context),
Ok(false) => eval_expression(&**false_expr, local_context),
_ => local_context.return_value.clone().expect("conditional expression did not evaluate to boolean"),
}
}
Expression::Array { values, .. } => Value::Array(
values.iter().map(|e| eval_expression(e, local_context)).collect(),
),
Expression::Struct { values, .. } => Value::Struct(
values
.iter()
.map(|(k, v)| (k.clone(), eval_expression(v, local_context)))
.collect(),
),
Expression::PathElements { elements } => {
Value::PathElements(convert_path(elements, local_context))
}
Expression::StoreLocalVariable { name, value } => {
let value = eval_expression(value, local_context);
local_context.local_variables.insert(name.clone(), value);
Value::Void
}
Expression::ReadLocalVariable { name, .. } => {
local_context.local_variables.get(name).unwrap().clone()
}
Expression::EasingCurve(curve) => Value::EasingCurve(match curve {
EasingCurve::Linear => corelib::animations::EasingCurve::Linear,
EasingCurve::CubicBezier(a, b, c, d) => {
corelib::animations::EasingCurve::CubicBezier([*a, *b, *c, *d])
}
}),
Expression::LinearGradient{angle, stops} => {
let angle = eval_expression(angle, local_context);
Value::Brush(Brush::LinearGradient(LinearGradientBrush::new(angle.try_into().unwrap(), stops.iter().map(|(color, stop)| {
let color = eval_expression(color, local_context).try_into().unwrap();
let position = eval_expression(stop, local_context).try_into().unwrap();
GradientStop{ color, position }
}))))
}
Expression::EnumerationValue(value) => {
Value::EnumerationValue(value.enumeration.name.clone(), value.to_string())
}
Expression::ReturnStatement(x) => {
let val = x.as_ref().map_or(Value::Void, |x| eval_expression(x, local_context));
if local_context.return_value.is_none() {
local_context.return_value = Some(val);
}
local_context.return_value.clone().unwrap()
}
Expression::LayoutCacheAccess { layout_cache_prop, index, repeater_index } => {
let cache = load_property_helper(local_context.component_instance, &layout_cache_prop.element(), layout_cache_prop.name()).unwrap();
if let Value::LayoutCache(cache) = cache {
if let Some(ri) = repeater_index {
let offset : usize = eval_expression(ri, local_context).try_into().unwrap();
Value::Number(cache[(cache[*index] as usize) + offset * 2].into())
} else {
Value::Number(cache[*index].into())
}
} else {
panic!("invalid layout cache")
}
}
Expression::ComputeLayoutInfo(lay, o) => crate::eval_layout::compute_layout_info(lay, *o, local_context),
Expression::SolveLayout(lay, o) => crate::eval_layout::solve_layout(lay, *o, local_context),
}
}
fn eval_assignment(lhs: &Expression, op: char, rhs: Value, local_context: &mut EvalLocalContext) {
let eval = |lhs| match (lhs, &rhs, op) {
(Value::String(ref mut a), Value::String(b), '+') => {
a.push_str(b.as_str());
Value::String(a.clone())
}
(Value::Number(a), Value::Number(b), '+') => Value::Number(a + b),
(Value::Number(a), Value::Number(b), '-') => Value::Number(a - b),
(Value::Number(a), Value::Number(b), '/') => Value::Number(a / b),
(Value::Number(a), Value::Number(b), '*') => Value::Number(a * b),
(lhs, rhs, op) => panic!("unsupported {:?} {} {:?}", lhs, op, rhs),
};
match lhs {
Expression::PropertyReference(nr) => {
let element = nr.element();
generativity::make_guard!(guard);
let enclosing_component = enclosing_component_instance_for_element(
&element,
local_context.component_instance,
guard,
);
match enclosing_component {
ComponentInstance::InstanceRef(enclosing_component) => {
if op == '=' {
store_property(enclosing_component, &element, nr.name(), rhs).unwrap();
return;
}
let component = element.borrow().enclosing_component.upgrade().unwrap();
if element.borrow().id == component.root_element.borrow().id {
if let Some(x) =
enclosing_component.component_type.custom_properties.get(nr.name())
{
unsafe {
let p = Pin::new_unchecked(
&*enclosing_component.as_ptr().add(x.offset),
);
x.prop.set(p, eval(x.prop.get(p).unwrap()), None).unwrap();
}
return;
}
};
let item_info =
&enclosing_component.component_type.items[element.borrow().id.as_str()];
let item =
unsafe { item_info.item_from_component(enclosing_component.as_ptr()) };
let p = &item_info.rtti.properties[nr.name()];
p.set(item, eval(p.get(item)), None).unwrap();
}
ComponentInstance::GlobalComponent(global) => {
let val = if op == '=' {
rhs
} else {
eval(global.as_ref().get_property(nr.name()).unwrap())
};
global.as_ref().set_property(nr.name(), val).unwrap();
}
}
}
Expression::StructFieldAccess { base, name } => {
if let Value::Struct(mut o) = eval_expression(base, local_context) {
let mut r = o.get_field(name).unwrap().clone();
r = if op == '=' { rhs } else { eval(std::mem::take(&mut r)) };
o.set_field(name.to_owned(), r);
eval_assignment(base, '=', Value::Struct(o), local_context)
}
}
Expression::RepeaterModelReference { element } => {
let element = element.upgrade().unwrap();
let component_instance = match local_context.component_instance {
ComponentInstance::InstanceRef(i) => i,
ComponentInstance::GlobalComponent(_) => panic!("can't have repeater in global"),
};
generativity::make_guard!(g1);
let enclosing_component =
enclosing_component_for_element(&element, component_instance, g1);
// we need a 'static Repeater component in order to call model_set_row_data, so get it.
// Safety: This is the only 'static Id in scope.
let static_guard =
unsafe { generativity::Guard::new(generativity::Id::<'static>::new()) };
let repeater = crate::dynamic_component::get_repeater_by_name(
enclosing_component,
element.borrow().id.as_str(),
static_guard,
);
repeater.0.model_set_row_data(
eval_expression(
&Expression::RepeaterIndexReference { element: Rc::downgrade(&element) },
local_context,
)
.try_into()
.unwrap(),
if op == '=' {
rhs
} else {
eval(eval_expression(
&Expression::RepeaterModelReference { element: Rc::downgrade(&element) },
local_context,
))
},
)
}
_ => panic!("typechecking should make sure this was a PropertyReference"),
}
}
pub fn load_property(component: InstanceRef, element: &ElementRc, name: &str) -> Result<Value, ()> {
load_property_helper(ComponentInstance::InstanceRef(component), element, name)
}
fn load_property_helper(
component_instance: ComponentInstance,
element: &ElementRc,
name: &str,
) -> Result<Value, ()> {
generativity::make_guard!(guard);
match enclosing_component_instance_for_element(element, component_instance, guard) {
ComponentInstance::InstanceRef(enclosing_component) => {
let element = element.borrow();
if element.id == element.enclosing_component.upgrade().unwrap().root_element.borrow().id
{
if let Some(x) = enclosing_component.component_type.custom_properties.get(name) {
return unsafe {
x.prop.get(Pin::new_unchecked(&*enclosing_component.as_ptr().add(x.offset)))
};
} else if enclosing_component.component_type.original.is_global() {
return Err(());
}
};
let item_info = enclosing_component
.component_type
.items
.get(element.id.as_str())
.unwrap_or_else(|| panic!("Unknown element for {}.{}", element.id, name));
core::mem::drop(element);
let item = unsafe { item_info.item_from_component(enclosing_component.as_ptr()) };
Ok(item_info.rtti.properties.get(name).ok_or(())?.get(item))
}
ComponentInstance::GlobalComponent(glob) => Ok(glob.as_ref().get_property(name).unwrap()),
}
}
pub fn store_property(
component_instance: InstanceRef,
element: &ElementRc,
name: &str,
value: Value,
) -> Result<(), SetPropertyError> {
generativity::make_guard!(guard);
match enclosing_component_instance_for_element(
element,
ComponentInstance::InstanceRef(component_instance),
guard,
) {
ComponentInstance::InstanceRef(enclosing_component) => {
let maybe_animation = match element.borrow().bindings.get(name) {
Some(b) => crate::dynamic_component::animation_for_property(
enclosing_component,
&b.borrow().animation,
),
None => {
crate::dynamic_component::animation_for_property(enclosing_component, &None)
}
};
let component = element.borrow().enclosing_component.upgrade().unwrap();
if element.borrow().id == component.root_element.borrow().id {
if let Some(x) = enclosing_component.component_type.custom_properties.get(name) {
if let Some(orig_decl) = enclosing_component
.component_type
.original
.root_element
.borrow()
.property_declarations
.get(name)
{
// Do an extra type checking because PropertyInfo::set won't do it for custom structures or array
if !check_value_type(&value, &orig_decl.property_type) {
return Err(SetPropertyError::WrongType);
}
}
unsafe {
let p = Pin::new_unchecked(&*enclosing_component.as_ptr().add(x.offset));
return x
.prop
.set(p, value, maybe_animation.as_animation())
.map_err(|()| SetPropertyError::WrongType);
}
} else if enclosing_component.component_type.original.is_global() {
return Err(SetPropertyError::NoSuchProperty);
}
};
let item_info = &enclosing_component.component_type.items[element.borrow().id.as_str()];
let item = unsafe { item_info.item_from_component(enclosing_component.as_ptr()) };
let p = &item_info.rtti.properties.get(name).ok_or(SetPropertyError::NoSuchProperty)?;
p.set(item, value, maybe_animation.as_animation())
.map_err(|()| SetPropertyError::WrongType)?;
}
ComponentInstance::GlobalComponent(glob) => {
glob.as_ref().set_property(name, value)?;
}
}
Ok(())
}
fn check_value_type(value: &Value, ty: &Type) -> bool {
match ty {
Type::Void => true,
Type::Invalid
| Type::InferredProperty
| Type::InferredCallback
| Type::Component(_)
| Type::Builtin(_)
| Type::Native(_)
| Type::Callback { .. }
| Type::Function { .. }
| Type::ElementReference => panic!("not valid property type"),
Type::Float32 => matches!(value, Value::Number(_)),
Type::Int32 => matches!(value, Value::Number(_)),
Type::String => matches!(value, Value::String(_)),
Type::Color => matches!(value, Value::Brush(_)),
Type::UnitProduct(_)
| Type::Duration
| Type::PhysicalLength
| Type::LogicalLength
| Type::Angle
| Type::Percent => matches!(value, Value::Number(_)),
Type::Image => matches!(value, Value::Image(_)),
Type::Bool => matches!(value, Value::Bool(_)),
Type::Model => {
matches!(value, Value::Model(_) | Value::Bool(_) | Value::Number(_) | Value::Array(_))
}
Type::PathElements => matches!(value, Value::PathElements(_)),
Type::Easing => matches!(value, Value::EasingCurve(_)),
Type::Brush => matches!(value, Value::Brush(_)),
Type::Array(inner) => {
matches!(value, Value::Model(_))
|| matches!(value, Value::Array(vec) if vec.iter().all(|x| check_value_type(x, inner)))
}
Type::Struct { fields, .. } => {
matches!(value, Value::Struct(str) if str.iter().all(|(k, v)| fields.get(k).map_or(false, |ty| check_value_type(v, ty))))
}
Type::Enumeration(en) => {
matches!(value, Value::EnumerationValue(name, _) if name == en.name.as_str())
}
Type::LayoutCache => matches!(value, Value::LayoutCache(_)),
}
}
pub(crate) fn invoke_callback(
component_instance: ComponentInstance,
element: &ElementRc,
callback_name: &str,
args: &[Value],
) -> Option<Value> {
generativity::make_guard!(guard);
match enclosing_component_instance_for_element(element, component_instance, guard) {
ComponentInstance::InstanceRef(enclosing_component) => {
let component_type = enclosing_component.component_type;
let element = element.borrow();
if element.id == element.enclosing_component.upgrade().unwrap().root_element.borrow().id
{
if let Some(callback_offset) = component_type.custom_callbacks.get(callback_name) {
let callback = callback_offset.apply(&*enclosing_component.instance);
let res = callback.call(args);
return Some(if res != Value::Void {
res
} else if let Some(Type::Callback { return_type: Some(rt), .. }) =
component_type
.original
.root_element
.borrow()
.property_declarations
.get(callback_name)
.map(|d| &d.property_type)
{
// If the callback was not se, the return value will be Value::Void, but we need
// to make sure that the value is actually of the right type as returned by the
// callback, otherwise we will get panics later
default_value_for_type(&*rt)
} else {
res
});
} else if enclosing_component.component_type.original.is_global() {
return None;
}
};
let item_info = &component_type.items[element.id.as_str()];
let item = unsafe { item_info.item_from_component(enclosing_component.as_ptr()) };
item_info.rtti.callbacks.get(callback_name).map(|callback| callback.call(item, args))
}
ComponentInstance::GlobalComponent(global) => {
Some(global.as_ref().invoke_callback(callback_name, args).unwrap())
}
}
}
fn root_component_instance<'a, 'old_id, 'new_id>(
component: InstanceRef<'a, 'old_id>,
guard: generativity::Guard<'new_id>,
) -> InstanceRef<'a, 'new_id> {
if let Some(parent_offset) = component.component_type.parent_component_offset {
let parent_component =
if let Some(parent) = parent_offset.apply(&*component.instance.get_ref()) {
*parent
} else {
panic!("invalid parent ptr");
};
// we need a 'static guard in order to be able to re-borrow with lifetime 'a.
// Safety: This is the only 'static Id in scope.
let static_guard = unsafe { generativity::Guard::new(generativity::Id::<'static>::new()) };
root_component_instance(
unsafe { InstanceRef::from_pin_ref(parent_component, static_guard) },
guard,
)
} else {
// Safety: new_id is an unique id
unsafe {
std::mem::transmute::<InstanceRef<'a, 'old_id>, InstanceRef<'a, 'new_id>>(component)
}
}
}
pub fn window_ref<'a>(component: InstanceRef<'a, '_>) -> Option<&'a WindowRc> {
component
.component_type
.window_offset
.apply(component.instance.get_ref())
.as_ref()
.map(|window| window.window_handle())
}
/// Return the component instance which hold the given element.
/// Does not take in account the global component.
pub fn enclosing_component_for_element<'a, 'old_id, 'new_id>(
element: &'a ElementRc,
component: InstanceRef<'a, 'old_id>,
guard: generativity::Guard<'new_id>,
) -> InstanceRef<'a, 'new_id> {
let enclosing = &element.borrow().enclosing_component.upgrade().unwrap();
if Rc::ptr_eq(enclosing, &component.component_type.original) {
// Safety: new_id is an unique id
unsafe {
std::mem::transmute::<InstanceRef<'a, 'old_id>, InstanceRef<'a, 'new_id>>(component)
}
} else {
assert!(!enclosing.is_global());
let parent_component = component
.component_type
.parent_component_offset
.unwrap()
.apply(component.as_ref())
.unwrap();
generativity::make_guard!(new_guard);
let parent_instance = unsafe { InstanceRef::from_pin_ref(parent_component, new_guard) };
let parent_instance = unsafe {
core::mem::transmute::<InstanceRef, InstanceRef<'a, 'static>>(parent_instance)
};
enclosing_component_for_element(element, parent_instance, guard)
}
}
/// Return the component instance which hold the given element.
/// The difference with enclosing_component_for_element is that it takes the GlobalComponent into account.
pub(crate) fn enclosing_component_instance_for_element<'a, 'old_id, 'new_id>(
element: &'a ElementRc,
component_instance: ComponentInstance<'a, 'old_id>,
guard: generativity::Guard<'new_id>,
) -> ComponentInstance<'a, 'new_id> {
let enclosing = &element.borrow().enclosing_component.upgrade().unwrap();
match component_instance {
ComponentInstance::InstanceRef(component) => {
if enclosing.is_global() && !component.component_type.original.is_global() {
// we need a 'static guard in order to be able to borrow from `root` otherwise it does not work because of variance.
// Safety: This is the only 'static Id in scope.
let static_guard =
unsafe { generativity::Guard::new(generativity::Id::<'static>::new()) };
let root = root_component_instance(component, static_guard);
ComponentInstance::GlobalComponent(
&root.component_type.extra_data_offset.apply(&*root.instance.get_ref()).globals
[enclosing.root_element.borrow().id.as_str()],
)
} else {