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Allow pure widgets to borrow from Application data 🎉

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This commit is contained in:
Héctor Ramón Jiménez 2022-02-11 22:07:21 +07:00
parent 43a7ad72ef
commit 01c5004959
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GPG key ID: 140CC052C94F138E
11 changed files with 103 additions and 98 deletions
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49
pure/src/widget/tree.rs
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@ -1,17 +1,27 @@
use crate::widget::Element;
use std::any::Any;
use std::marker::PhantomData;
use std::any::{self, Any};
pub struct Tree<Message, Renderer> {
pub struct Tree {
pub tag: any::TypeId,
pub state: Box<dyn Any>,
pub children: Vec<Tree<Message, Renderer>>,
types_: PhantomData<(Message, Renderer)>,
pub children: Vec<Tree>,
}
impl<Message, Renderer> Tree<Message, Renderer> {
pub fn new(element: &Element<Message, Renderer>) -> Self {
impl Tree {
pub fn empty() -> Self {
Self {
tag: any::TypeId::of::<()>(),
state: Box::new(()),
children: Vec::new(),
}
}
pub fn new<Message, Renderer>(
element: &Element<'_, Message, Renderer>,
) -> Self {
Self {
tag: element.as_widget().tag(),
state: element.as_widget().state(),
children: element
.as_widget()
@ -19,36 +29,29 @@ impl<Message, Renderer> Tree<Message, Renderer> {
.iter()
.map(Self::new)
.collect(),
types_: PhantomData,
}
}
pub fn diff(
pub fn diff<Message, Renderer>(
&mut self,
current: &Element<Message, Renderer>,
new: &Element<Message, Renderer>,
new: &Element<'_, Message, Renderer>,
) {
if current.as_widget().tag() == new.as_widget().tag() {
let current_children = current.as_widget().children();
if self.tag == new.as_widget().tag() {
let new_children = new.as_widget().children();
if current_children.len() > new_children.len() {
if self.children.len() > new_children.len() {
self.children.truncate(new_children.len());
}
for (child_state, (current, new)) in self
.children
.iter_mut()
.zip(current_children.iter().zip(new_children.iter()))
for (child_state, new) in
self.children.iter_mut().zip(new_children.iter())
{
child_state.diff(current, new);
child_state.diff(new);
}
if current_children.len() < new_children.len() {
if self.children.len() < new_children.len() {
self.children.extend(
new_children[current_children.len()..]
.iter()
.map(Self::new),
new_children[self.children.len()..].iter().map(Self::new),
);
}
} else {