mirror of
https://github.com/DioxusLabs/dioxus
synced 2024-11-23 12:43:08 +00:00
249 lines
8.7 KiB
Rust
249 lines
8.7 KiB
Rust
#![allow(non_snake_case)]
|
|
use dioxus::prelude::*;
|
|
use dioxus_native_core::exports::shipyard::Component;
|
|
use dioxus_native_core::node_ref::*;
|
|
use dioxus_native_core::prelude::*;
|
|
use dioxus_native_core_macro::partial_derive_state;
|
|
|
|
struct FontSize(f64);
|
|
|
|
// All states need to derive Component
|
|
#[derive(Default, Debug, Copy, Clone, Component)]
|
|
struct Size(f64, f64);
|
|
|
|
/// Derive some of the boilerplate for the State implementation
|
|
#[partial_derive_state]
|
|
impl State for Size {
|
|
type ParentDependencies = ();
|
|
|
|
// The size of the current node depends on the size of its children
|
|
type ChildDependencies = (Self,);
|
|
|
|
type NodeDependencies = ();
|
|
|
|
// Size only cares about the width, height, and text parts of the current node
|
|
const NODE_MASK: NodeMaskBuilder<'static> = NodeMaskBuilder::new()
|
|
// Get access to the width and height attributes
|
|
.with_attrs(AttributeMaskBuilder::Some(&["width", "height"]))
|
|
// Get access to the text of the node
|
|
.with_text();
|
|
|
|
fn update<'a>(
|
|
&mut self,
|
|
node_view: NodeView<()>,
|
|
_node: <Self::NodeDependencies as Dependancy>::ElementBorrowed<'a>,
|
|
_parent: Option<<Self::ParentDependencies as Dependancy>::ElementBorrowed<'a>>,
|
|
children: Vec<<Self::ChildDependencies as Dependancy>::ElementBorrowed<'a>>,
|
|
context: &SendAnyMap,
|
|
) -> bool {
|
|
let font_size = context.get::<FontSize>().unwrap().0;
|
|
let mut width;
|
|
let mut height;
|
|
if let Some(text) = node_view.text() {
|
|
// if the node has text, use the text to size our object
|
|
width = text.len() as f64 * font_size;
|
|
height = font_size;
|
|
} else {
|
|
// otherwise, the size is the maximum size of the children
|
|
width = children
|
|
.iter()
|
|
.map(|(item,)| item.0)
|
|
.reduce(|accum, item| if accum >= item { accum } else { item })
|
|
.unwrap_or(0.0);
|
|
|
|
height = children
|
|
.iter()
|
|
.map(|(item,)| item.1)
|
|
.reduce(|accum, item| if accum >= item { accum } else { item })
|
|
.unwrap_or(0.0);
|
|
}
|
|
// if the node contains a width or height attribute it overrides the other size
|
|
for a in node_view.attributes().into_iter().flatten() {
|
|
match &*a.attribute.name {
|
|
"width" => width = a.value.as_float().unwrap(),
|
|
"height" => height = a.value.as_float().unwrap(),
|
|
// because Size only depends on the width and height, no other attributes will be passed to the member
|
|
_ => panic!(),
|
|
}
|
|
}
|
|
// to determine what other parts of the dom need to be updated we return a boolean that marks if this member changed
|
|
let changed = (width != self.0) || (height != self.1);
|
|
*self = Self(width, height);
|
|
changed
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, Copy, PartialEq, Default, Component)]
|
|
struct TextColor {
|
|
r: u8,
|
|
g: u8,
|
|
b: u8,
|
|
}
|
|
|
|
#[partial_derive_state]
|
|
impl State for TextColor {
|
|
// TextColor depends on the TextColor part of the parent
|
|
type ParentDependencies = (Self,);
|
|
|
|
type ChildDependencies = ();
|
|
|
|
type NodeDependencies = ();
|
|
|
|
// TextColor only cares about the color attribute of the current node
|
|
const NODE_MASK: NodeMaskBuilder<'static> =
|
|
// Get access to the color attribute
|
|
NodeMaskBuilder::new().with_attrs(AttributeMaskBuilder::Some(&["color"]));
|
|
|
|
fn update<'a>(
|
|
&mut self,
|
|
node_view: NodeView<()>,
|
|
_node: <Self::NodeDependencies as Dependancy>::ElementBorrowed<'a>,
|
|
parent: Option<<Self::ParentDependencies as Dependancy>::ElementBorrowed<'a>>,
|
|
_children: Vec<<Self::ChildDependencies as Dependancy>::ElementBorrowed<'a>>,
|
|
_context: &SendAnyMap,
|
|
) -> bool {
|
|
// TextColor only depends on the color tag, so getting the first tag is equivilent to looking through all tags
|
|
let new = match node_view
|
|
.attributes()
|
|
.and_then(|mut attrs| attrs.next())
|
|
.and_then(|attr| attr.value.as_text())
|
|
{
|
|
// if there is a color tag, translate it
|
|
Some("red") => TextColor { r: 255, g: 0, b: 0 },
|
|
Some("green") => TextColor { r: 0, g: 255, b: 0 },
|
|
Some("blue") => TextColor { r: 0, g: 0, b: 255 },
|
|
Some(color) => panic!("unknown color {color}"),
|
|
// otherwise check if the node has a parent and inherit that color
|
|
None => match parent {
|
|
Some((parent,)) => *parent,
|
|
None => Self::default(),
|
|
},
|
|
};
|
|
// check if the member has changed
|
|
let changed = new != *self;
|
|
*self = new;
|
|
changed
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, Copy, PartialEq, Default, Component)]
|
|
struct Border(bool);
|
|
|
|
#[partial_derive_state]
|
|
impl State for Border {
|
|
// TextColor depends on the TextColor part of the parent
|
|
type ParentDependencies = (Self,);
|
|
|
|
type ChildDependencies = ();
|
|
|
|
type NodeDependencies = ();
|
|
|
|
// Border does not depended on any other member in the current node
|
|
const NODE_MASK: NodeMaskBuilder<'static> =
|
|
// Get access to the border attribute
|
|
NodeMaskBuilder::new().with_attrs(AttributeMaskBuilder::Some(&["border"]));
|
|
|
|
fn update<'a>(
|
|
&mut self,
|
|
node_view: NodeView<()>,
|
|
_node: <Self::NodeDependencies as Dependancy>::ElementBorrowed<'a>,
|
|
_parent: Option<<Self::ParentDependencies as Dependancy>::ElementBorrowed<'a>>,
|
|
_children: Vec<<Self::ChildDependencies as Dependancy>::ElementBorrowed<'a>>,
|
|
_context: &SendAnyMap,
|
|
) -> bool {
|
|
// check if the node contians a border attribute
|
|
let new = Self(
|
|
node_view
|
|
.attributes()
|
|
.and_then(|mut attrs| attrs.next().map(|a| a.attribute.name == "border"))
|
|
.is_some(),
|
|
);
|
|
// check if the member has changed
|
|
let changed = new != *self;
|
|
*self = new;
|
|
changed
|
|
}
|
|
}
|
|
|
|
fn main() -> Result<(), Box<dyn std::error::Error>> {
|
|
fn app(cx: Scope) -> Element {
|
|
let count = use_state(cx, || 0);
|
|
|
|
use_future(cx, (count,), |(count,)| async move {
|
|
loop {
|
|
tokio::time::sleep(std::time::Duration::from_secs(1)).await;
|
|
count.set(*count + 1);
|
|
}
|
|
});
|
|
|
|
cx.render(rsx! {
|
|
div{
|
|
color: "red",
|
|
"{count}",
|
|
Comp {}
|
|
}
|
|
})
|
|
}
|
|
|
|
fn Comp(cx: Scope) -> Element {
|
|
cx.render(rsx! {
|
|
div{
|
|
border: "",
|
|
"hello world"
|
|
}
|
|
})
|
|
}
|
|
|
|
// create the vdom, the real_dom, and the binding layer between them
|
|
let mut vdom = VirtualDom::new(app);
|
|
let mut rdom: RealDom = RealDom::new([
|
|
Border::to_type_erased(),
|
|
TextColor::to_type_erased(),
|
|
Size::to_type_erased(),
|
|
]);
|
|
let mut dioxus_intigration_state = DioxusState::create(&mut rdom);
|
|
|
|
let mutations = vdom.rebuild();
|
|
// update the structure of the real_dom tree
|
|
dioxus_intigration_state.apply_mutations(&mut rdom, mutations);
|
|
let mut ctx = SendAnyMap::new();
|
|
// set the font size to 3.3
|
|
ctx.insert(FontSize(3.3));
|
|
// update the State for nodes in the real_dom tree
|
|
let _to_rerender = rdom.update_state(ctx);
|
|
|
|
// we need to run the vdom in a async runtime
|
|
tokio::runtime::Builder::new_current_thread()
|
|
.enable_all()
|
|
.build()?
|
|
.block_on(async {
|
|
loop {
|
|
// wait for the vdom to update
|
|
vdom.wait_for_work().await;
|
|
|
|
// get the mutations from the vdom
|
|
let mutations = vdom.render_immediate();
|
|
|
|
// update the structure of the real_dom tree
|
|
dioxus_intigration_state.apply_mutations(&mut rdom, mutations);
|
|
|
|
// update the state of the real_dom tree
|
|
let mut ctx = SendAnyMap::new();
|
|
// set the font size to 3.3
|
|
ctx.insert(FontSize(3.3));
|
|
let _to_rerender = rdom.update_state(ctx);
|
|
|
|
// render...
|
|
rdom.traverse_depth_first_advanced(true, |node| {
|
|
let indent = " ".repeat(node.height() as usize);
|
|
let color = *node.get::<TextColor>().unwrap();
|
|
let size = *node.get::<Size>().unwrap();
|
|
let border = *node.get::<Border>().unwrap();
|
|
let id = node.id();
|
|
let node = node.node_type();
|
|
let node_type = &*node;
|
|
println!("{indent}{id:?} {color:?} {size:?} {border:?} {node_type:?}");
|
|
});
|
|
}
|
|
})
|
|
}
|