mirror of
https://github.com/slint-ui/slint.git
synced 2025-11-03 21:24:17 +00:00
0f6c3a4fd7
This removes a lot of allocations and speeds up the compiler step
a bit. Sadly, this patch is very invasive as it touches a lot of
files. That said, each individual hunk is pretty trivial.
For a non-trivial real-world example, the impact is significant,
we get rid of ~29% of all allocations and improve the runtime by
about 4.8% (measured until the viewer loop would start).
Before:
```
Benchmark 1: ./target/release/slint-viewer ../slint-perf/app.slint
Time (mean ± σ): 664.2 ms ± 6.7 ms [User: 589.2 ms, System: 74.0 ms]
Range (min … max): 659.0 ms … 682.4 ms 10 runs
allocations: 4886888
temporary allocations: 857508
```
After:
```
Benchmark 1: ./target/release/slint-viewer ../slint-perf/app.slint
Time (mean ± σ): 639.5 ms ± 17.8 ms [User: 556.9 ms, System: 76.2 ms]
Range (min … max): 621.4 ms … 666.5 ms 10 runs
allocations: 3544318
temporary allocations: 495685
```
571 lines
23 KiB
Rust
571 lines
23 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint.dev>
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// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
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/*! Set the width and height of Rectangle, TouchArea, ... to 100%,
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the implicit width or aspect ratio preserving for Images.
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Also set the Image.image-fit default depending on the presence of a
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layout parent.
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This pass must be run after lower_layout
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*/
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use std::cell::RefCell;
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use std::rc::Rc;
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use crate::diagnostics::{BuildDiagnostics, Spanned};
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use crate::expression_tree::{
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BindingExpression, BuiltinFunction, Expression, MinMaxOp, NamedReference, Unit,
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};
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use crate::langtype::{BuiltinElement, DefaultSizeBinding, Type};
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use crate::layout::{implicit_layout_info_call, LayoutConstraints, Orientation};
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use crate::object_tree::{Component, ElementRc};
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use smol_str::format_smolstr;
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use std::collections::HashMap;
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pub fn default_geometry(root_component: &Rc<Component>, diag: &mut BuildDiagnostics) {
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crate::object_tree::recurse_elem_including_sub_components(
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root_component,
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&None,
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&mut |elem: &ElementRc, parent: &Option<ElementRc>| {
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if elem.borrow().repeated.is_some() {
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return None;
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}
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// whether the width, or height, is filling the parent
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let (mut w100, mut h100) = (false, false);
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w100 |= fix_percent_size(elem, parent, "width", diag);
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h100 |= fix_percent_size(elem, parent, "height", diag);
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gen_layout_info_prop(elem, diag);
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let builtin_type = match elem.borrow().builtin_type() {
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Some(b) => b,
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None => return Some(elem.clone()),
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};
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let is_image = builtin_type.name == "Image";
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if is_image {
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adjust_image_clip_rect(elem, &builtin_type);
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}
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if let Some(parent) = parent {
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match builtin_type.default_size_binding {
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DefaultSizeBinding::None => {
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if elem.borrow().default_fill_parent.0 {
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let e_width =
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elem.borrow().geometry_props.as_ref().unwrap().width.clone();
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let p_width =
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parent.borrow().geometry_props.as_ref().unwrap().width.clone();
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w100 |= make_default_100(&e_width, &p_width);
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} else {
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make_default_implicit(elem, "width");
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}
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if elem.borrow().default_fill_parent.1 {
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let e_height =
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elem.borrow().geometry_props.as_ref().unwrap().height.clone();
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let p_height =
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parent.borrow().geometry_props.as_ref().unwrap().height.clone();
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h100 |= make_default_100(&e_height, &p_height);
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} else {
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make_default_implicit(elem, "height");
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}
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}
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DefaultSizeBinding::ExpandsToParentGeometry => {
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if !elem.borrow().child_of_layout {
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let (e_width, e_height) = elem
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.borrow()
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.geometry_props
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.as_ref()
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.map(|g| (g.width.clone(), g.height.clone()))
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.unwrap();
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let (p_width, p_height) = parent
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.borrow()
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.geometry_props
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.as_ref()
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.map(|g| (g.width.clone(), g.height.clone()))
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.unwrap();
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w100 |= make_default_100(&e_width, &p_width);
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h100 |= make_default_100(&e_height, &p_height);
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}
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}
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DefaultSizeBinding::ImplicitSize => {
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let has_length_property_binding = |elem: &ElementRc, property: &str| {
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debug_assert_eq!(
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elem.borrow().lookup_property(property).property_type,
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Type::LogicalLength
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);
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elem.borrow().is_binding_set(property, true)
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};
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let width_specified = has_length_property_binding(elem, "width");
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let height_specified = has_length_property_binding(elem, "height");
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if !elem.borrow().child_of_layout {
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// Add aspect-ratio preserving width or height bindings
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if is_image && width_specified && !height_specified {
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make_default_aspect_ratio_preserving_binding(
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elem, "height", "width",
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)
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} else if is_image && height_specified && !width_specified {
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make_default_aspect_ratio_preserving_binding(
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elem, "width", "height",
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)
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} else {
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make_default_implicit(elem, "width");
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make_default_implicit(elem, "height");
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}
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} else if is_image {
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// If an image is in a layout and has no explicit width or height specified, change the default for image-fit
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// to `contain`
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if !width_specified || !height_specified {
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let image_fit_lookup = elem.borrow().lookup_property("image-fit");
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elem.borrow_mut().set_binding_if_not_set(
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image_fit_lookup.resolved_name.into(),
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|| {
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Expression::EnumerationValue(
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image_fit_lookup
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.property_type
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.as_enum()
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.clone()
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.try_value_from_string("contain")
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.unwrap(),
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)
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},
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);
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}
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}
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}
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}
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if !elem.borrow().child_of_layout
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&& !elem.borrow().is_legacy_syntax
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&& builtin_type.name != "Window"
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{
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if !w100 {
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maybe_center_in_parent(elem, parent, "x", "width");
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}
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if !h100 {
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maybe_center_in_parent(elem, parent, "y", "height");
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}
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}
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}
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Some(elem.clone())
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},
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)
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}
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/// Generate a layout_info_prop based on the children layouts
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fn gen_layout_info_prop(elem: &ElementRc, diag: &mut BuildDiagnostics) {
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if elem.borrow().layout_info_prop.is_some() || elem.borrow().is_flickable_viewport {
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return;
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}
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let child_infos = elem
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.borrow()
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.children
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.iter()
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.filter(|c| {
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!c.borrow().bindings.contains_key("x") && !c.borrow().bindings.contains_key("y")
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})
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.filter_map(|c| {
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gen_layout_info_prop(c, diag);
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c.borrow()
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.layout_info_prop
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.clone()
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.map(|(h, v)| {
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(Some(Expression::PropertyReference(h)), Some(Expression::PropertyReference(v)))
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})
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.or_else(|| {
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if c.borrow().is_legacy_syntax {
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return None;
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}
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if c.borrow().repeated.is_some() {
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// FIXME: we should ideally add runtime code to merge layout info of all elements that are repeated (same as #407)
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return None;
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}
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let explicit_constraints = LayoutConstraints::new(c, diag);
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let use_implicit_size = c.borrow().builtin_type().map_or(false, |b| {
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b.default_size_binding == DefaultSizeBinding::ImplicitSize
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});
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let compute = |orientation| {
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if !explicit_constraints.has_explicit_restrictions(orientation) {
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use_implicit_size.then(|| implicit_layout_info_call(c, orientation))
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} else {
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Some(explicit_layout_info(c, orientation))
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}
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};
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Some((compute(Orientation::Horizontal), compute(Orientation::Vertical)))
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.filter(|(a, b)| a.is_some() || b.is_some())
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})
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})
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.collect::<Vec<_>>();
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if child_infos.is_empty() {
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return;
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}
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let li_v =
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crate::layout::create_new_prop(elem, "layoutinfo-v", crate::layout::layout_info_type());
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let li_h =
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crate::layout::create_new_prop(elem, "layoutinfo-h", crate::layout::layout_info_type());
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elem.borrow_mut().layout_info_prop = Some((li_h.clone(), li_v.clone()));
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let mut expr_h = implicit_layout_info_call(elem, Orientation::Horizontal);
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let mut expr_v = implicit_layout_info_call(elem, Orientation::Vertical);
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let explicit_constraints = LayoutConstraints::new(elem, diag);
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if !explicit_constraints.fixed_width {
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merge_explicit_constraints(&mut expr_h, &explicit_constraints, Orientation::Horizontal);
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}
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if !explicit_constraints.fixed_height {
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merge_explicit_constraints(&mut expr_v, &explicit_constraints, Orientation::Vertical);
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}
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for child_info in child_infos {
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if let Some(h) = child_info.0 {
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expr_h = Expression::BinaryExpression {
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lhs: Box::new(std::mem::take(&mut expr_h)),
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rhs: Box::new(h),
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op: '+',
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};
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}
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if let Some(v) = child_info.1 {
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expr_v = Expression::BinaryExpression {
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lhs: Box::new(std::mem::take(&mut expr_v)),
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rhs: Box::new(v),
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op: '+',
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};
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}
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}
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let expr_v = BindingExpression::new_with_span(expr_v, elem.borrow().to_source_location());
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li_v.element().borrow_mut().bindings.insert(li_v.name().into(), expr_v.into());
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let expr_h = BindingExpression::new_with_span(expr_h, elem.borrow().to_source_location());
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li_h.element().borrow_mut().bindings.insert(li_h.name().into(), expr_h.into());
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}
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fn merge_explicit_constraints(
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expr: &mut Expression,
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constraints: &LayoutConstraints,
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orientation: Orientation,
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) {
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if constraints.has_explicit_restrictions(orientation) {
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static COUNT: std::sync::atomic::AtomicUsize = std::sync::atomic::AtomicUsize::new(0);
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let unique_name = format_smolstr!(
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"layout_info_{}",
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COUNT.fetch_add(1, std::sync::atomic::Ordering::Relaxed)
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);
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let ty = expr.ty();
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let store = Expression::StoreLocalVariable {
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name: unique_name.clone(),
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value: Box::new(std::mem::take(expr)),
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};
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let Type::Struct { fields, .. } = &ty else { unreachable!() };
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let mut values = fields
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.keys()
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.map(|p| {
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(
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p.clone(),
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Expression::StructFieldAccess {
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base: Expression::ReadLocalVariable {
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name: unique_name.clone(),
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ty: ty.clone(),
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}
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.into(),
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name: p.clone(),
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},
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)
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})
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.collect::<HashMap<_, _>>();
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for (nr, s) in constraints.for_each_restrictions(orientation) {
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let e = nr
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.element()
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.borrow()
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.bindings
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.get(nr.name())
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.expect("constraint must have binding")
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.borrow()
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.expression
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.clone();
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debug_assert!(!matches!(e, Expression::Invalid));
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values.insert(s.into(), e);
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}
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*expr = Expression::CodeBlock([store, Expression::Struct { ty, values }].into());
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}
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}
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fn explicit_layout_info(e: &ElementRc, orientation: Orientation) -> Expression {
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let mut values = HashMap::new();
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let (size, orient) = match orientation {
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Orientation::Horizontal => ("width", "horizontal"),
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Orientation::Vertical => ("height", "vertical"),
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};
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for (k, v) in [
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("min", format!("min-{size}")),
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("max", format!("max-{size}")),
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("preferred", format!("preferred-{size}")),
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("stretch", format!("{orient}-stretch")),
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] {
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values.insert(k.into(), Expression::PropertyReference(NamedReference::new(e, &v)));
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}
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values.insert("min_percent".into(), Expression::NumberLiteral(0., Unit::None));
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values.insert("max_percent".into(), Expression::NumberLiteral(100., Unit::None));
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Expression::Struct { ty: crate::layout::layout_info_type(), values }
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}
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/// Replace expression such as `"width: 30%;` with `width: 0.3 * parent.width;`
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///
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/// Returns true if the expression was 100%
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fn fix_percent_size(
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elem: &ElementRc,
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parent: &Option<ElementRc>,
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property: &str,
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diag: &mut BuildDiagnostics,
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) -> bool {
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let elem = elem.borrow();
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let binding = match elem.bindings.get(property) {
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Some(b) => b,
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None => return false,
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};
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if binding.borrow().ty() != Type::Percent {
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let Some(parent) = parent.as_ref() else { return false };
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// Pattern match to check it was already parent.<property>
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return matches!(&binding.borrow().expression, Expression::PropertyReference(nr) if nr.name() == property && Rc::ptr_eq(&nr.element(), parent));
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}
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let mut b = binding.borrow_mut();
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if let Some(mut parent) = parent.clone() {
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if parent.borrow().is_flickable_viewport {
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// the `%` in a flickable need to refer to the size of the flickable, not the size of the viewport
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parent = crate::object_tree::find_parent_element(&parent).unwrap_or(parent)
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}
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debug_assert_eq!(
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parent.borrow().lookup_property(property).property_type,
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Type::LogicalLength
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);
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let fill =
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matches!(b.expression, Expression::NumberLiteral(x, _) if (x - 100.).abs() < 0.001);
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b.expression = Expression::BinaryExpression {
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lhs: Box::new(std::mem::take(&mut b.expression).maybe_convert_to(
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Type::Float32,
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&b.span,
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diag,
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)),
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rhs: Box::new(Expression::PropertyReference(NamedReference::new(&parent, property))),
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op: '*',
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};
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fill
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} else {
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diag.push_error("Cannot find parent property to apply relative length".into(), &b.span);
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false
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}
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}
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/// Generate a size property that covers the parent.
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/// Return true if it was changed
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fn make_default_100(prop: &NamedReference, parent_prop: &NamedReference) -> bool {
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prop.element().borrow_mut().set_binding_if_not_set(prop.name().into(), || {
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Expression::PropertyReference(parent_prop.clone())
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})
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}
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fn make_default_implicit(elem: &ElementRc, property: &str) {
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let e = crate::builtin_macros::min_max_expression(
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Expression::PropertyReference(NamedReference::new(
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elem,
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&format!("preferred-{}", property),
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)),
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Expression::PropertyReference(NamedReference::new(elem, &format!("min-{}", property))),
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MinMaxOp::Max,
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);
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elem.borrow_mut().set_binding_if_not_set(property.into(), || e);
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}
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// For an element with `width`, `height`, `preferred-width` and `preferred-height`, make an aspect
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// ratio preserving binding. This is currently only called for Image elements. For example when for an
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// image the `width` is specified and there is no `height` binding, it is called with `missing_size_property = height`
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// and `given_size_property = width` and install a binding like this:
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//
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// height: self.width * self.preferred_height / self.preferred_width;
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//
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fn make_default_aspect_ratio_preserving_binding(
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elem: &ElementRc,
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missing_size_property: &str,
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given_size_property: &str,
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) {
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if elem.borrow().is_binding_set(missing_size_property, false) {
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return;
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}
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debug_assert_eq!(elem.borrow().lookup_property("source").property_type, Type::Image);
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let ratio = if elem.borrow().is_binding_set("source-clip-height", false) {
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Expression::BinaryExpression {
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lhs: Box::new(Expression::PropertyReference(NamedReference::new(
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elem,
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&format!("source-clip-{missing_size_property}"),
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))),
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rhs: Box::new(Expression::PropertyReference(NamedReference::new(
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elem,
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&format!("source-clip-{given_size_property}"),
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))),
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op: '/',
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}
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} else {
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let implicit_size_var = Box::new(Expression::ReadLocalVariable {
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name: "image_implicit_size".into(),
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ty: match BuiltinFunction::ImageSize.ty() {
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Type::Function { return_type, .. } => *return_type,
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_ => panic!("invalid type for ImplicitItemSize built-in function"),
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},
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});
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Expression::CodeBlock(vec![
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Expression::StoreLocalVariable {
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name: "image_implicit_size".into(),
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value: Box::new(Expression::FunctionCall {
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function: Box::new(Expression::BuiltinFunctionReference(
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BuiltinFunction::ImageSize,
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None,
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)),
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arguments: vec![Expression::PropertyReference(NamedReference::new(
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elem, "source",
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))],
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source_location: None,
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}),
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},
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Expression::BinaryExpression {
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lhs: Box::new(Expression::StructFieldAccess {
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base: implicit_size_var.clone(),
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name: missing_size_property.into(),
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}),
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rhs: Box::new(Expression::StructFieldAccess {
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base: implicit_size_var,
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name: given_size_property.into(),
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}),
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op: '/',
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},
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])
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};
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let binding = Expression::BinaryExpression {
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lhs: Box::new(ratio),
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rhs: Expression::PropertyReference(NamedReference::new(elem, given_size_property)).into(),
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op: '*',
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};
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elem.borrow_mut().bindings.insert(missing_size_property.into(), RefCell::new(binding.into()));
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}
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fn maybe_center_in_parent(elem: &ElementRc, parent: &ElementRc, pos_prop: &str, size_prop: &str) {
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if elem.borrow().is_binding_set(pos_prop, false) {
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return;
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|
}
|
|
|
|
let diff = Expression::BinaryExpression {
|
|
lhs: Expression::PropertyReference(NamedReference::new(parent, size_prop)).into(),
|
|
op: '-',
|
|
rhs: Expression::PropertyReference(NamedReference::new(elem, size_prop)).into(),
|
|
};
|
|
|
|
elem.borrow_mut().set_binding_if_not_set(pos_prop.into(), || Expression::BinaryExpression {
|
|
lhs: diff.into(),
|
|
op: '/',
|
|
rhs: Expression::NumberLiteral(2., Unit::None).into(),
|
|
});
|
|
}
|
|
|
|
fn adjust_image_clip_rect(elem: &ElementRc, builtin: &Rc<BuiltinElement>) {
|
|
debug_assert_eq!(builtin.native_class.class_name, "ClippedImage");
|
|
|
|
if builtin.native_class.properties.keys().any(|p| {
|
|
elem.borrow().bindings.contains_key(p)
|
|
|| elem.borrow().property_analysis.borrow().get(p).map_or(false, |a| a.is_used())
|
|
}) {
|
|
let source = NamedReference::new(elem, "source");
|
|
let x = NamedReference::new(elem, "source-clip-x");
|
|
let y = NamedReference::new(elem, "source-clip-y");
|
|
let make_expr = |dim: &str, prop: NamedReference| Expression::BinaryExpression {
|
|
lhs: Box::new(Expression::StructFieldAccess {
|
|
base: Box::new(Expression::FunctionCall {
|
|
function: Box::new(Expression::BuiltinFunctionReference(
|
|
BuiltinFunction::ImageSize,
|
|
None,
|
|
)),
|
|
arguments: vec![Expression::PropertyReference(source.clone())],
|
|
source_location: None,
|
|
}),
|
|
name: dim.into(),
|
|
}),
|
|
rhs: Expression::PropertyReference(prop).into(),
|
|
op: '-',
|
|
};
|
|
|
|
elem.borrow_mut()
|
|
.set_binding_if_not_set("source-clip-width".into(), || make_expr("width", x));
|
|
elem.borrow_mut()
|
|
.set_binding_if_not_set("source-clip-height".into(), || make_expr("height", y));
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_no_property_for_100pc() {
|
|
//! Test that we don't generate x or y property to center elements if the size is filling the parent
|
|
let mut compiler_config =
|
|
crate::CompilerConfiguration::new(crate::generator::OutputFormat::Interpreter);
|
|
compiler_config.style = Some("fluent".into());
|
|
let mut test_diags = crate::diagnostics::BuildDiagnostics::default();
|
|
let doc_node = crate::parser::parse(
|
|
r#"
|
|
export component Foo inherits Window {
|
|
r1 := Rectangle {
|
|
r2 := Rectangle {
|
|
width: 100%;
|
|
background: blue;
|
|
}
|
|
r3 := Rectangle {
|
|
height: parent.height;
|
|
width: 50%;
|
|
background: red;
|
|
}
|
|
}
|
|
|
|
out property <length> r2x: r2.x;
|
|
out property <length> r2y: r2.y;
|
|
out property <length> r3x: r3.x;
|
|
out property <length> r3y: r3.y;
|
|
}
|
|
"#
|
|
.into(),
|
|
Some(std::path::Path::new("HELLO")),
|
|
&mut test_diags,
|
|
);
|
|
let (doc, diag, _) =
|
|
spin_on::spin_on(crate::compile_syntax_node(doc_node, test_diags, compiler_config));
|
|
assert!(!diag.has_errors(), "{:?}", diag.to_string_vec());
|
|
|
|
let root_elem = doc.inner_components.last().unwrap().root_element.borrow();
|
|
|
|
// const propagation must have seen that the x and y property are literal 0
|
|
assert!(matches!(
|
|
&root_elem.bindings.get("r2x").unwrap().borrow().expression,
|
|
Expression::NumberLiteral(v, _) if *v == 0.
|
|
));
|
|
assert!(matches!(
|
|
&root_elem.bindings.get("r2y").unwrap().borrow().expression,
|
|
Expression::NumberLiteral(v, _) if *v == 0.
|
|
));
|
|
assert!(matches!(
|
|
&root_elem.bindings.get("r3y").unwrap().borrow().expression,
|
|
Expression::NumberLiteral(v, _) if *v == 0.
|
|
));
|
|
// this one is 50% so it should be set to be in the center
|
|
assert!(!matches!(
|
|
&root_elem.bindings.get("r3x").unwrap().borrow().expression,
|
|
Expression::BinaryExpression { .. }
|
|
));
|
|
}
|