async

src/lib.rs

@@ -55,10 +55,10 @@ pub mod utils;
 pub mod prelude {
     pub use crate::ui::Color::*;
     pub use crate::ui::Font::*;
-    pub use crate::ui::Instruction::*;
     pub use crate::ui::Number::{Auto, Center};
+    pub use crate::Instruction::*;
     pub use crate::{self as osui, css, ersx, launch, rsx, ui::*, Handler};
-    pub use crate::{style, Component, Document, State};
+    pub use crate::{style, Component, Document, Instruction, State};
     pub use crate::{Children, Element, ElementCore, ElementWidget};
     pub use crossterm::event::{Event, KeyCode, KeyEvent, KeyEventKind};
     pub use osui_element::component;
@@ -197,17 +197,19 @@ impl Document {
         }
     }
     pub fn run(&mut self) -> bool {
+        // Set up the screen
+        utils::hide_cursor();
+        crossterm::terminal::enable_raw_mode().unwrap();
+        utils::clear();
+
         self.running = None;
         let element = unsafe { &mut *self.element };
+        self.render();
         element.initialize(self);
 
         // Send initial event
         element.event(crossterm::event::Event::FocusGained, self);
 
-        utils::hide_cursor();
-        crossterm::terminal::enable_raw_mode().unwrap();
-        utils::clear();
-
         while self.running == None {
             self.render();
             element.event(crossterm::event::read().unwrap(), self);
@@ -509,3 +511,11 @@ impl<T: PartialEq> PartialEq<T> for State<T> {
         self.use_state().ne(other)
     }
 }
+
+#[derive(Debug)]
+pub enum Instruction<'a> {
+    SetStyle(ui::Css),
+    SetChild(usize),
+    Ghost(usize),
+    Load(Handler<ui::Div<'a>>),
+}

src/main.rs

@@ -1,4 +1,5 @@
-use osui::{examples, prelude::*};
+use osui::prelude::*;
+
 fn main() {
     launch!(App);
 }
@@ -6,34 +7,12 @@ fn main() {
 #[component]
 pub fn App() {
     rsx! {
-        @SetChild(1)
-        @SetStyle(css! {
-            example {
-                outline: true,
-                y: Auto,
-                x: 0 px,
-            }
-            example: "hover" {
-                color: Blue,
-                outline_color: Red,
-            }
+        async {
+            sleep(3000);
+            ersx!(text {
+                "OK"
             })
-
-        %text { class: "red-bg", static "Select an example" }
-
-        button { class: "example", on_click: fn(_, _, document) {
-            document.clear_css();
-            document.draw(examples::counter_example::App::default().create_element());
-        }, static "Counter" }
-
-        button { class: "example", on_click: fn(_, _, document) {
-            document.clear_css();
-            document.draw(examples::todo_example::App::default().create_element());
-        }, static "Todo" }
-
-        button { class: "example", on_click: fn(_, _, document) {
-            document.clear_css();
-            document.draw(examples::login_example::App::default().create_element());
-        }, static "Login" }
+        }
+        text { "Hello world!" }
     }
 }

src/rsx.rs

@@ -12,6 +12,15 @@ macro_rules! check_expr {
 }
 #[macro_export]
 macro_rules! parse_rsx_param {
+    ($elem:expr, async $code:block $($rest:tt)*) => {
+        $elem.instructions.push($crate::Instruction::Load(Handler::new(
+            |d: &mut Div, _, _| {
+                d.children.add_child($code);
+            }
+        )));
+        osui::parse_rsx_param!($elem, $($rest)*);
+    };
+
     ($elem:expr, %$elem_path:path { $($inner:tt)* } $($rest:tt)*) => {
         $elem.ghosts.push($elem.ghosts.len());
         if let $crate::Children::Children(children, _) = &mut $elem.children {

src/ui/mod.rs

@@ -29,17 +29,10 @@ pub fn text<'a>(class: &'a str, id: &'a str, children: Children, style: Style) -
     })
 }
 
-#[derive(Debug)]
-pub enum Instruction {
-    SetStyle(Css),
-    SetChild(usize),
-    Ghost(usize),
-}
-
 #[element]
 #[derive(Default, Debug)]
 pub struct Div {
-    pub instructions: Vec<Instruction>,
+    pub instructions: Vec<Instruction<'a>>,
     pub ghosts: Vec<usize>,
 }
 
@@ -99,6 +92,7 @@ impl ElementWidget for Div<'_> {
     }
 
     fn initialize(&mut self, document: &mut Document) {
+        let mut load_funcs = Vec::new();
         for inst in &self.instructions {
             match inst {
                 Instruction::SetStyle(s) => {
@@ -110,9 +104,16 @@ impl ElementWidget for Div<'_> {
                 Instruction::Ghost(idx) => {
                     self.ghosts.push(*idx);
                 }
+                Instruction::Load(f) => {
+                    load_funcs.push(f.clone());
                 }
             }
         }
+        self.instructions.clear();
+        for l in load_funcs {
+            l.call(self, Event::FocusGained, document)
+        }
+    }
 }
 
 #[component]
@@ -121,7 +122,7 @@ pub fn div<'a>(
     id: &'a str,
     children: Children,
     style: Style,
-    instructions: Vec<Instruction>,
+    instructions: Vec<Instruction<'a>>,
     ghosts: Vec<usize>,
 ) -> Box<Div<'a>> {
     Box::new(Div {

src/ui/styles.rs

@@ -56,7 +56,6 @@ pub enum Number {
     Pe(u16),
     Center,
     Auto,
-    Default,
 }
 
 #[derive(PartialEq, Eq, Hash, Debug, Clone)]
@@ -152,10 +151,10 @@ impl Default for StyleElement {
             cursor: (false, Color::NoColor),
             font: (false, Vec::new()),
             outline_color: (false, Color::NoColor),
-            x: (false, Number::Default),
-            y: (false, Number::Px(0)),
-            width: (false, Number::Default),
-            height: (false, Number::Default),
+            x: (false, Number::Px(0)),
+            y: (false, Number::Auto),
+            width: (false, Number::Auto),
+            height: (false, Number::Auto),
             visible: (false, true),
             outline: (false, false),
             caret: (false, String::from("█")),
@@ -322,7 +321,7 @@ impl Number {
         }
     }
     pub fn as_size(&self, written: u16, frame_size: u16, outline: bool) -> u16 {
-        if *self == Number::Auto || *self == Number::Default {
+        if *self == Number::Auto {
             written
         } else if outline {
             self.as_size_raw(frame_size) - 2
@@ -335,7 +334,7 @@ impl Number {
             crate::ui::Number::Px(px) => *px,
             crate::ui::Number::Pe(pe) => (frame_size * pe) / 100,
             crate::ui::Number::Center => (frame_size) / 2,
-            crate::ui::Number::Auto | crate::ui::Number::Default => *used,
+            crate::ui::Number::Auto => *used,
         }
     }
 }