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Introduce a rem unit in the type system

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This allows specifying font sizes relative to the Window's
default-font-size, similar to CSS rem.
This commit is contained in:
Simon Hausmann 2022-11-03 20:00:55 +01:00 • committed by Simon Hausmann
parent 75ccd897ed
commit d8a1f2cf01
22 changed files with 232 additions and 58 deletions
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9
internal/compiler/generator/rust.rs
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@ -76,6 +76,7 @@ fn rust_primitive_type(ty: &Type) -> Option<proc_macro2::TokenStream> {
Type::Angle => Some(quote!(f32)),
Type::PhysicalLength => Some(quote!(slint::private_unstable_api::re_exports::Coord)),
Type::LogicalLength => Some(quote!(slint::private_unstable_api::re_exports::Coord)),
Type::Rem => Some(quote!(f32)),
Type::Percent => Some(quote!(f32)),
Type::Bool => Some(quote!(bool)),
Type::Image => Some(quote!(slint::private_unstable_api::re_exports::Image)),
@ -1863,6 +1864,7 @@ fn compile_expression(expr: &Expression, ctx: &EvaluationContext) -> TokenStream
| Type::LogicalLength
| Type::Angle
| Type::Percent
| Type::Rem
) =>
{
(Some(quote!(as f64)), Some(quote!(as f64)))
@ -2152,6 +2154,13 @@ fn compile_builtin_function_call(
let window_adapter_tokens = access_window_adapter_field(ctx);
quote!(slint::private_unstable_api::re_exports::WindowInner::from_pub(#window_adapter_tokens.window()).scale_factor())
}
BuiltinFunction::GetWindowDefaultFontSize => {
let window_item_name = ident(&ctx.public_component.item_tree.root.items[0].name);
let root_access = &ctx.generator_state;
let root_component_id = inner_component_id(&ctx.public_component.item_tree.root);
let item_field = access_component_field_offset(&root_component_id, &window_item_name);
quote!((#item_field + slint::private_unstable_api::re_exports::WindowItem::FIELD_OFFSETS.default_font_size).apply_pin(#root_access.as_pin_ref()).get().get())
}
BuiltinFunction::AnimationTick => {
quote!(slint::private_unstable_api::re_exports::animation_tick())
}