Merge remote-tracking branch 'upstream/master' into fix_nonbubbling_web_events

packages/tui/src/focus.rs

@@ -0,0 +1,282 @@
+use crate::{node::PreventDefault, Dom};
+
+use dioxus_core::ElementId;
+use dioxus_native_core::utils::{ElementProduced, PersistantElementIter};
+use dioxus_native_core_macro::sorted_str_slice;
+
+use std::{cmp::Ordering, num::NonZeroU16};
+
+use dioxus_native_core::{
+    node_ref::{AttributeMask, NodeMask, NodeView},
+    real_dom::NodeType,
+    state::NodeDepState,
+};
+
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub(crate) enum FocusLevel {
+    Unfocusable,
+    Focusable,
+    Ordered(std::num::NonZeroU16),
+}
+
+impl FocusLevel {
+    pub fn focusable(&self) -> bool {
+        match self {
+            FocusLevel::Unfocusable => false,
+            FocusLevel::Focusable => true,
+            FocusLevel::Ordered(_) => true,
+        }
+    }
+}
+
+impl PartialOrd for FocusLevel {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        match (self, other) {
+            (FocusLevel::Unfocusable, FocusLevel::Unfocusable) => Some(std::cmp::Ordering::Equal),
+            (FocusLevel::Unfocusable, FocusLevel::Focusable) => Some(std::cmp::Ordering::Less),
+            (FocusLevel::Unfocusable, FocusLevel::Ordered(_)) => Some(std::cmp::Ordering::Less),
+            (FocusLevel::Focusable, FocusLevel::Unfocusable) => Some(std::cmp::Ordering::Greater),
+            (FocusLevel::Focusable, FocusLevel::Focusable) => Some(std::cmp::Ordering::Equal),
+            (FocusLevel::Focusable, FocusLevel::Ordered(_)) => Some(std::cmp::Ordering::Greater),
+            (FocusLevel::Ordered(_), FocusLevel::Unfocusable) => Some(std::cmp::Ordering::Greater),
+            (FocusLevel::Ordered(_), FocusLevel::Focusable) => Some(std::cmp::Ordering::Less),
+            (FocusLevel::Ordered(a), FocusLevel::Ordered(b)) => a.partial_cmp(b),
+        }
+    }
+}
+
+impl Ord for FocusLevel {
+    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+        self.partial_cmp(other).unwrap()
+    }
+}
+
+impl Default for FocusLevel {
+    fn default() -> Self {
+        FocusLevel::Unfocusable
+    }
+}
+
+#[derive(Clone, PartialEq, Debug, Default)]
+pub(crate) struct Focus {
+    pub level: FocusLevel,
+}
+
+impl NodeDepState for Focus {
+    type Ctx = ();
+    type DepState = ();
+    const NODE_MASK: NodeMask =
+        NodeMask::new_with_attrs(AttributeMask::Static(FOCUS_ATTRIBUTES)).with_listeners();
+
+    fn reduce(&mut self, node: NodeView<'_>, _sibling: &Self::DepState, _: &Self::Ctx) -> bool {
+        let new = Focus {
+            level: if let Some(a) = node.attributes().find(|a| a.name == "tabindex") {
+                if let Some(index) = a
+                    .value
+                    .as_int32()
+                    .or_else(|| a.value.as_text().and_then(|v| v.parse::<i32>().ok()))
+                {
+                    match index.cmp(&0) {
+                        Ordering::Less => FocusLevel::Unfocusable,
+                        Ordering::Equal => FocusLevel::Focusable,
+                        Ordering::Greater => {
+                            FocusLevel::Ordered(NonZeroU16::new(index as u16).unwrap())
+                        }
+                    }
+                } else {
+                    FocusLevel::Unfocusable
+                }
+            } else if node
+                .listeners()
+                .iter()
+                .any(|l| FOCUS_EVENTS.binary_search(&l.event).is_ok())
+            {
+                FocusLevel::Focusable
+            } else {
+                FocusLevel::Unfocusable
+            },
+        };
+        if *self != new {
+            *self = new;
+            true
+        } else {
+            false
+        }
+    }
+}
+
+const FOCUS_EVENTS: &[&str] = &sorted_str_slice!(["keydown", "keypress", "keyup"]);
+const FOCUS_ATTRIBUTES: &[&str] = &sorted_str_slice!(["tabindex"]);
+
+#[derive(Default)]
+pub(crate) struct FocusState {
+    pub(crate) focus_iter: PersistantElementIter,
+    pub(crate) last_focused_id: Option<ElementId>,
+    pub(crate) focus_level: FocusLevel,
+    pub(crate) dirty: bool,
+}
+
+impl FocusState {
+    /// Returns true if the focus has changed.
+    pub fn progress(&mut self, rdom: &mut Dom, forward: bool) -> bool {
+        if let Some(last) = self.last_focused_id {
+            if rdom[last].state.prevent_default == PreventDefault::KeyDown {
+                return false;
+            }
+        }
+        // the id that started focused to track when a loop has happened
+        let mut loop_marker_id = self.last_focused_id;
+        let focus_level = &mut self.focus_level;
+        let mut next_focus = None;
+
+        loop {
+            let new = if forward {
+                self.focus_iter.next(rdom)
+            } else {
+                self.focus_iter.prev(rdom)
+            };
+            let new_id = new.id();
+            if let ElementProduced::Looped(_) = new {
+                let mut closest_level = None;
+
+                if forward {
+                    // find the closest focusable element after the current level
+                    rdom.traverse_depth_first(|n| {
+                        let node_level = n.state.focus.level;
+                        if node_level != *focus_level
+                            && node_level.focusable()
+                            && node_level > *focus_level
+                        {
+                            if let Some(level) = &mut closest_level {
+                                if node_level < *level {
+                                    *level = node_level;
+                                }
+                            } else {
+                                closest_level = Some(node_level);
+                            }
+                        }
+                    });
+                } else {
+                    // find the closest focusable element before the current level
+                    rdom.traverse_depth_first(|n| {
+                        let node_level = n.state.focus.level;
+                        if node_level != *focus_level
+                            && node_level.focusable()
+                            && node_level < *focus_level
+                        {
+                            if let Some(level) = &mut closest_level {
+                                if node_level > *level {
+                                    *level = node_level;
+                                }
+                            } else {
+                                closest_level = Some(node_level);
+                            }
+                        }
+                    });
+                }
+
+                // extend the loop_marker_id to allow for another pass
+                loop_marker_id = None;
+
+                if let Some(level) = closest_level {
+                    *focus_level = level;
+                } else if forward {
+                    *focus_level = FocusLevel::Unfocusable;
+                } else {
+                    *focus_level = FocusLevel::Focusable;
+                }
+            }
+
+            // once we have looked at all the elements exit the loop
+            if let Some(last) = loop_marker_id {
+                if new_id == last {
+                    break;
+                }
+            } else {
+                loop_marker_id = Some(new_id);
+            }
+
+            let current_level = rdom[new_id].state.focus.level;
+            let after_previous_focused = if forward {
+                current_level >= *focus_level
+            } else {
+                current_level <= *focus_level
+            };
+            if after_previous_focused && current_level.focusable() && current_level == *focus_level
+            {
+                next_focus = Some(new_id);
+                break;
+            }
+        }
+
+        if let Some(id) = next_focus {
+            rdom[id].state.focused = true;
+            if let Some(old) = self.last_focused_id.replace(id) {
+                rdom[old].state.focused = false;
+            }
+            // reset the position to the currently focused element
+            while self.focus_iter.next(rdom).id() != id {}
+            self.dirty = true;
+            return true;
+        }
+
+        false
+    }
+
+    pub(crate) fn prune(&mut self, mutations: &dioxus_core::Mutations, rdom: &Dom) {
+        fn remove_children(
+            to_prune: &mut [&mut Option<ElementId>],
+            rdom: &Dom,
+            removed: ElementId,
+        ) {
+            for opt in to_prune.iter_mut() {
+                if let Some(id) = opt {
+                    if *id == removed {
+                        **opt = None;
+                    }
+                }
+            }
+            if let NodeType::Element { children, .. } = &rdom[removed].node_type {
+                for child in children {
+                    remove_children(to_prune, rdom, *child);
+                }
+            }
+        }
+        if self.focus_iter.prune(mutations, rdom) {
+            self.dirty = true;
+        }
+        for m in &mutations.edits {
+            match m {
+                dioxus_core::DomEdit::ReplaceWith { root, .. } => remove_children(
+                    &mut [&mut self.last_focused_id],
+                    rdom,
+                    ElementId(*root as usize),
+                ),
+                dioxus_core::DomEdit::Remove { root } => remove_children(
+                    &mut [&mut self.last_focused_id],
+                    rdom,
+                    ElementId(*root as usize),
+                ),
+                _ => (),
+            }
+        }
+    }
+
+    pub(crate) fn set_focus(&mut self, rdom: &mut Dom, id: ElementId) {
+        if let Some(old) = self.last_focused_id.replace(id) {
+            rdom[old].state.focused = false;
+        }
+        let state = &mut rdom[id].state;
+        state.focused = true;
+        self.focus_level = state.focus.level;
+        // reset the position to the currently focused element
+        while self.focus_iter.next(rdom).id() != id {}
+        self.dirty = true;
+    }
+
+    pub(crate) fn clean(&mut self) -> bool {
+        let old = self.dirty;
+        self.dirty = false;
+        old
+    }
+}

packages/tui/src/hooks.rs

@@ -12,7 +12,7 @@ use dioxus_html::input_data::{MouseButton as DioxusMouseButton, MouseButtonSet};
 use dioxus_html::{event_bubbles, on::*, KeyCode};
 use std::{
     any::Any,
-    cell::RefCell,
+    cell::{RefCell, RefMut},
     rc::Rc,
     sync::Arc,
     time::{Duration, Instant},
@@ -20,6 +20,7 @@ use std::{
 use taffy::geometry::{Point, Size};
 use taffy::{prelude::Layout, Taffy};
 
+use crate::FocusState;
 use crate::{Dom, Node};
 
 // a wrapper around the input state for easier access
@@ -36,22 +37,22 @@ use crate::{Dom, Node};
 
 //     pub fn mouse(&self) -> Option<MouseData> {
 //         let data = (**self.0).borrow();
-//         data.mouse.as_ref().map(|m| m.clone())
+//         mouse.as_ref().map(|m| m.clone())
 //     }
 
 //     pub fn wheel(&self) -> Option<WheelData> {
 //         let data = (**self.0).borrow();
-//         data.wheel.as_ref().map(|w| w.clone())
+//         wheel.as_ref().map(|w| w.clone())
 //     }
 
 //     pub fn screen(&self) -> Option<(u16, u16)> {
 //         let data = (**self.0).borrow();
-//         data.screen.as_ref().map(|m| m.clone())
+//         screen.as_ref().map(|m| m.clone())
 //     }
 
 //     pub fn last_key_pressed(&self) -> Option<KeyboardData> {
 //         let data = (**self.0).borrow();
-//         data.last_key_pressed
+//         last_key_pressed
 //             .as_ref()
 //             .map(|k| &k.0.clone())
 //     }
@@ -84,6 +85,7 @@ pub struct InnerInputState {
     wheel: Option<WheelData>,
     last_key_pressed: Option<(KeyboardData, Instant)>,
     screen: Option<(u16, u16)>,
+    pub(crate) focus_state: FocusState,
     // subscribers: Vec<Rc<dyn Fn() + 'static>>,
 }
 
@@ -95,6 +97,7 @@ impl InnerInputState {
             last_key_pressed: None,
             screen: None,
             // subscribers: Vec::new(),
+            focus_state: FocusState::default(),
         }
     }
 
@@ -151,7 +154,7 @@ impl InnerInputState {
 
     fn update(
         &mut self,
-        evts: &mut [EventCore],
+        evts: &mut Vec<EventCore>,
         resolved_events: &mut Vec<UserEvent>,
         layout: &Taffy,
         dom: &mut Dom,
@@ -160,19 +163,57 @@ impl InnerInputState {
 
         self.wheel = None;
 
+        let old_focus = self.focus_state.last_focused_id;
+
+        evts.retain(|e| match &e.1 {
+            EventData::Keyboard(k) => match k.key_code {
+                KeyCode::Tab => !self.focus_state.progress(dom, !k.shift_key),
+                _ => true,
+            },
+            _ => true,
+        });
+
         for e in evts.iter_mut() {
             self.apply_event(e);
         }
 
         self.resolve_mouse_events(previous_mouse, resolved_events, layout, dom);
 
+        if old_focus != self.focus_state.last_focused_id {
+            if let Some(id) = self.focus_state.last_focused_id {
+                resolved_events.push(UserEvent {
+                    scope_id: None,
+                    priority: EventPriority::Medium,
+                    name: "focus",
+                    element: Some(id),
+                    data: Arc::new(FocusData {}),
+                });
+                resolved_events.push(UserEvent {
+                    scope_id: None,
+                    priority: EventPriority::Medium,
+                    name: "focusin",
+                    element: Some(id),
+                    data: Arc::new(FocusData {}),
+                });
+            }
+            if let Some(id) = old_focus {
+                resolved_events.push(UserEvent {
+                    scope_id: None,
+                    priority: EventPriority::Medium,
+                    name: "focusout",
+                    element: Some(id),
+                    data: Arc::new(FocusData {}),
+                });
+            }
+        }
+
         // for s in &self.subscribers {
         //     s();
         // }
     }
 
     fn resolve_mouse_events(
-        &self,
+        &mut self,
         previous_mouse: Option<MouseData>,
         resolved_events: &mut Vec<UserEvent>,
         layout: &Taffy,
@@ -257,16 +298,16 @@ impl InnerInputState {
                 if old_pos != Some(new_pos) {
                     let mut will_bubble = FxHashSet::default();
                     for node in dom.get_listening_sorted("mousemove") {
-                        let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
+                        let node_layout = get_abs_layout(node, dom, layout);
                         let previously_contained = old_pos
-                            .filter(|pos| layout_contains_point(node_layout, *pos))
+                            .filter(|pos| layout_contains_point(&node_layout, *pos))
                             .is_some();
-                        let currently_contains = layout_contains_point(node_layout, new_pos);
+                        let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                         if currently_contains && previously_contained {
                             try_create_event(
                                 "mousemove",
-                                Arc::new(prepare_mouse_data(mouse_data, node_layout)),
+                                Arc::new(prepare_mouse_data(mouse_data, &node_layout)),
                                 &mut will_bubble,
                                 resolved_events,
                                 node,
@@ -281,11 +322,11 @@ impl InnerInputState {
                 // mouseenter
                 let mut will_bubble = FxHashSet::default();
                 for node in dom.get_listening_sorted("mouseenter") {
-                    let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
+                    let node_layout = get_abs_layout(node, dom, layout);
                     let previously_contained = old_pos
-                        .filter(|pos| layout_contains_point(node_layout, *pos))
+                        .filter(|pos| layout_contains_point(&node_layout, *pos))
                         .is_some();
-                    let currently_contains = layout_contains_point(node_layout, new_pos);
+                    let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                     if currently_contains && !previously_contained {
                         try_create_event(
@@ -304,16 +345,16 @@ impl InnerInputState {
                 // mouseover
                 let mut will_bubble = FxHashSet::default();
                 for node in dom.get_listening_sorted("mouseover") {
-                    let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
+                    let node_layout = get_abs_layout(node, dom, layout);
                     let previously_contained = old_pos
-                        .filter(|pos| layout_contains_point(node_layout, *pos))
+                        .filter(|pos| layout_contains_point(&node_layout, *pos))
                         .is_some();
-                    let currently_contains = layout_contains_point(node_layout, new_pos);
+                    let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                     if currently_contains && !previously_contained {
                         try_create_event(
                             "mouseover",
-                            Arc::new(prepare_mouse_data(mouse_data, node_layout)),
+                            Arc::new(prepare_mouse_data(mouse_data, &node_layout)),
                             &mut will_bubble,
                             resolved_events,
                             node,
@@ -327,13 +368,13 @@ impl InnerInputState {
             if was_pressed {
                 let mut will_bubble = FxHashSet::default();
                 for node in dom.get_listening_sorted("mousedown") {
-                    let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
-                    let currently_contains = layout_contains_point(node_layout, new_pos);
+                    let node_layout = get_abs_layout(node, dom, layout);
+                    let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                     if currently_contains {
                         try_create_event(
                             "mousedown",
-                            Arc::new(prepare_mouse_data(mouse_data, node_layout)),
+                            Arc::new(prepare_mouse_data(mouse_data, &node_layout)),
                             &mut will_bubble,
                             resolved_events,
                             node,
@@ -348,13 +389,13 @@ impl InnerInputState {
                 if was_released {
                     let mut will_bubble = FxHashSet::default();
                     for node in dom.get_listening_sorted("mouseup") {
-                        let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
-                        let currently_contains = layout_contains_point(node_layout, new_pos);
+                        let node_layout = get_abs_layout(node, dom, layout);
+                        let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                         if currently_contains {
                             try_create_event(
                                 "mouseup",
-                                Arc::new(prepare_mouse_data(mouse_data, node_layout)),
+                                Arc::new(prepare_mouse_data(mouse_data, &node_layout)),
                                 &mut will_bubble,
                                 resolved_events,
                                 node,
@@ -370,13 +411,13 @@ impl InnerInputState {
                 if mouse_data.trigger_button() == Some(DioxusMouseButton::Primary) && was_released {
                     let mut will_bubble = FxHashSet::default();
                     for node in dom.get_listening_sorted("click") {
-                        let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
-                        let currently_contains = layout_contains_point(node_layout, new_pos);
+                        let node_layout = get_abs_layout(node, dom, layout);
+                        let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                         if currently_contains {
                             try_create_event(
                                 "click",
-                                Arc::new(prepare_mouse_data(mouse_data, node_layout)),
+                                Arc::new(prepare_mouse_data(mouse_data, &node_layout)),
                                 &mut will_bubble,
                                 resolved_events,
                                 node,
@@ -393,13 +434,13 @@ impl InnerInputState {
                 {
                     let mut will_bubble = FxHashSet::default();
                     for node in dom.get_listening_sorted("contextmenu") {
-                        let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
-                        let currently_contains = layout_contains_point(node_layout, new_pos);
+                        let node_layout = get_abs_layout(node, dom, layout);
+                        let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                         if currently_contains {
                             try_create_event(
                                 "contextmenu",
-                                Arc::new(prepare_mouse_data(mouse_data, node_layout)),
+                                Arc::new(prepare_mouse_data(mouse_data, &node_layout)),
                                 &mut will_bubble,
                                 resolved_events,
                                 node,
@@ -416,9 +457,9 @@ impl InnerInputState {
                     if wheel_delta != 0.0 {
                         let mut will_bubble = FxHashSet::default();
                         for node in dom.get_listening_sorted("wheel") {
-                            let node_layout =
-                                layout.layout(node.state.layout.node.unwrap()).unwrap();
-                            let currently_contains = layout_contains_point(node_layout, new_pos);
+                            let node_layout = get_abs_layout(node, dom, layout);
+
+                            let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                             if currently_contains {
                                 try_create_event(
@@ -439,16 +480,16 @@ impl InnerInputState {
                 // mouseleave
                 let mut will_bubble = FxHashSet::default();
                 for node in dom.get_listening_sorted("mouseleave") {
-                    let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
+                    let node_layout = get_abs_layout(node, dom, layout);
                     let previously_contained = old_pos
-                        .filter(|pos| layout_contains_point(node_layout, *pos))
+                        .filter(|pos| layout_contains_point(&node_layout, *pos))
                         .is_some();
-                    let currently_contains = layout_contains_point(node_layout, new_pos);
+                    let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                     if !currently_contains && previously_contained {
                         try_create_event(
                             "mouseleave",
-                            Arc::new(prepare_mouse_data(mouse_data, node_layout)),
+                            Arc::new(prepare_mouse_data(mouse_data, &node_layout)),
                             &mut will_bubble,
                             resolved_events,
                             node,
@@ -462,16 +503,16 @@ impl InnerInputState {
                 // mouseout
                 let mut will_bubble = FxHashSet::default();
                 for node in dom.get_listening_sorted("mouseout") {
-                    let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
+                    let node_layout = get_abs_layout(node, dom, layout);
                     let previously_contained = old_pos
-                        .filter(|pos| layout_contains_point(node_layout, *pos))
+                        .filter(|pos| layout_contains_point(&node_layout, *pos))
                         .is_some();
-                    let currently_contains = layout_contains_point(node_layout, new_pos);
+                    let currently_contains = layout_contains_point(&node_layout, new_pos);
 
                     if !currently_contains && previously_contained {
                         try_create_event(
                             "mouseout",
-                            Arc::new(prepare_mouse_data(mouse_data, node_layout)),
+                            Arc::new(prepare_mouse_data(mouse_data, &node_layout)),
                             &mut will_bubble,
                             resolved_events,
                             node,
@@ -480,6 +521,22 @@ impl InnerInputState {
                     }
                 }
             }
+
+            // update focus
+            if was_released {
+                let mut focus_id = None;
+                dom.traverse_depth_first(|node| {
+                    let node_layout = layout.layout(node.state.layout.node.unwrap()).unwrap();
+                    let currently_contains = layout_contains_point(node_layout, new_pos);
+
+                    if currently_contains && node.state.focus.level.focusable() {
+                        focus_id = Some(node.id);
+                    }
+                });
+                if let Some(id) = focus_id {
+                    self.focus_state.set_focus(dom, id);
+                }
+            }
         }
     }
 
@@ -488,6 +545,20 @@ impl InnerInputState {
     // }
 }
 
+fn get_abs_layout(node: &Node, dom: &Dom, taffy: &Taffy) -> Layout {
+    let mut node_layout = *taffy.layout(node.state.layout.node.unwrap()).unwrap();
+    let mut current = node;
+
+    while let Some(parent_id) = current.parent {
+        let parent = &dom[parent_id];
+        current = parent;
+        let parent_layout = taffy.layout(parent.state.layout.node.unwrap()).unwrap();
+        node_layout.location.x += parent_layout.location.x;
+        node_layout.location.y += parent_layout.location.y;
+    }
+    node_layout
+}
+
 pub struct RinkInputHandler {
     state: Rc<RefCell<InnerInputState>>,
     queued_events: Rc<RefCell<Vec<EventCore>>>,
@@ -524,6 +595,10 @@ impl RinkInputHandler {
         )
     }
 
+    pub(crate) fn prune(&self, mutations: &dioxus_core::Mutations, rdom: &Dom) {
+        self.state.borrow_mut().focus_state.prune(mutations, rdom);
+    }
+
     pub(crate) fn get_events(&self, layout: &Taffy, dom: &mut Dom) -> Vec<UserEvent> {
         let mut resolved_events = Vec::new();
 
@@ -557,7 +632,6 @@ impl RinkInputHandler {
             })
             .map(|evt| (evt.0, evt.1.into_any()));
 
-        // todo: currently resolves events in all nodes, but once the focus system is added it should filter by focus
         let mut hm: FxHashMap<&'static str, Vec<Arc<dyn Any + Send + Sync>>> = FxHashMap::default();
         for (event, data) in events {
             if let Some(v) = hm.get_mut(event) {
@@ -569,20 +643,26 @@ impl RinkInputHandler {
         for (event, datas) in hm {
             for node in dom.get_listening_sorted(event) {
                 for data in &datas {
-                    resolved_events.push(UserEvent {
-                        scope_id: None,
-                        priority: EventPriority::Medium,
-                        name: event,
-                        element: Some(node.id),
-                        data: data.clone(),
-                        bubbles: event_bubbles(event),
-                    });
+                    if node.state.focused {
+                        resolved_events.push(UserEvent {
+                            scope_id: None,
+                            priority: EventPriority::Medium,
+                            name: event,
+                            element: Some(node.id),
+                            data: data.clone(),
+                            bubbles: event_bubbles(event),
+                        });
+                    }
                 }
             }
         }
 
         resolved_events
     }
+
+    pub(crate) fn state(&self) -> RefMut<InnerInputState> {
+        self.state.borrow_mut()
+    }
 }
 
 // translate crossterm events into dioxus events

packages/tui/src/lib.rs

@@ -7,23 +7,23 @@ use crossterm::{
 };
 use dioxus_core::exports::futures_channel::mpsc::unbounded;
 use dioxus_core::*;
-use dioxus_native_core::{real_dom::RealDom, state::*};
-use dioxus_native_core_macro::State;
+use dioxus_native_core::real_dom::RealDom;
+use focus::FocusState;
 use futures::{
     channel::mpsc::{UnboundedReceiver, UnboundedSender},
     pin_mut, StreamExt,
 };
-use layout::TaffyLayout;
 use std::cell::RefCell;
 use std::rc::Rc;
 use std::{io, time::Duration};
-use style_attributes::StyleModifier;
 use taffy::{geometry::Point, prelude::Size, Taffy};
 use tui::{backend::CrosstermBackend, layout::Rect, Terminal};
 
 mod config;
+mod focus;
 mod hooks;
 mod layout;
+mod node;
 mod render;
 mod style;
 mod style_attributes;
@@ -31,18 +31,7 @@ mod widget;
 
 pub use config::*;
 pub use hooks::*;
-
-type Dom = RealDom<NodeState>;
-type Node = dioxus_native_core::real_dom::Node<NodeState>;
-
-#[derive(Debug, Clone, State, Default)]
-struct NodeState {
-    #[child_dep_state(layout, RefCell<Taffy>)]
-    layout: TaffyLayout,
-    // depends on attributes, the C component of it's parent and a u8 context
-    #[parent_dep_state(style)]
-    style: StyleModifier,
-}
+pub(crate) use node::*;
 
 #[derive(Clone)]
 pub struct TuiContext {
@@ -52,6 +41,12 @@ impl TuiContext {
     pub fn quit(&self) {
         self.tx.unbounded_send(InputEvent::Close).unwrap();
     }
+
+    pub fn inject_event(&self, event: crossterm::event::Event) {
+        self.tx
+            .unbounded_send(InputEvent::UserInput(event))
+            .unwrap();
+    }
 }
 
 pub fn launch(app: Component<()>) {
@@ -71,7 +66,6 @@ pub fn launch_cfg(app: Component<()>, cfg: Config) {
             let tick_rate = Duration::from_millis(1000);
             loop {
                 if crossterm::event::poll(tick_rate).unwrap() {
-                    // if crossterm::event::poll(timeout).unwrap() {
                     let evt = crossterm::event::read().unwrap();
                     if event_tx.unbounded_send(InputEvent::UserInput(evt)).is_err() {
                         break;
@@ -130,7 +124,7 @@ fn render_vdom(
             }
 
             let mut to_rerender: fxhash::FxHashSet<usize> = vec![0].into_iter().collect();
-            let mut resized = true;
+            let mut updated = true;
 
             loop {
                 /*
@@ -144,8 +138,8 @@ fn render_vdom(
                 todo: lazy re-rendering
                 */
 
-                if !to_rerender.is_empty() || resized {
-                    resized = false;
+                if !to_rerender.is_empty() || updated {
+                    updated = false;
                     fn resize(dims: Rect, taffy: &mut Taffy, rdom: &Dom) {
                         let width = dims.width;
                         let height = dims.height;
@@ -180,8 +174,8 @@ fn render_vdom(
                             Rect {
                                 x: 0,
                                 y: 0,
-                                width: 300,
-                                height: 300,
+                                width: 100,
+                                height: 100,
                             },
                             &mut taffy.borrow_mut(),
                             &rdom,
@@ -209,7 +203,7 @@ fn render_vdom(
                                             break;
                                         }
                                     }
-                                    TermEvent::Resize(_, _) => resized = true,
+                                    TermEvent::Resize(_, _) => updated = true,
                                     TermEvent::Mouse(_) => {}
                                 },
                                 InputEvent::Close => break,
@@ -224,10 +218,16 @@ fn render_vdom(
 
                 {
                     let evts = handler.get_events(&taffy.borrow(), &mut rdom);
+                    {
+                        updated |= handler.state().focus_state.clean();
+                    }
                     for e in evts {
                         vdom.handle_message(SchedulerMsg::Event(e));
                     }
                     let mutations = vdom.work_with_deadline(|| false);
+                    for m in &mutations {
+                        handler.prune(m, &rdom);
+                    }
                     // updates the dom's nodes
                     let to_update = rdom.apply_mutations(mutations);
                     // update the style and layout
@@ -251,6 +251,7 @@ fn render_vdom(
         })
 }
 
+#[derive(Debug)]
 enum InputEvent {
     UserInput(TermEvent),
     Close,

packages/tui/src/node.rs

@@ -0,0 +1,94 @@
+use crate::focus::Focus;
+use crate::layout::TaffyLayout;
+use crate::style_attributes::StyleModifier;
+use dioxus_native_core::{real_dom::RealDom, state::*};
+use dioxus_native_core_macro::{sorted_str_slice, State};
+
+pub(crate) type Dom = RealDom<NodeState>;
+pub(crate) type Node = dioxus_native_core::real_dom::Node<NodeState>;
+
+#[derive(Debug, Clone, State, Default)]
+pub(crate) struct NodeState {
+    #[child_dep_state(layout, RefCell<Stretch>)]
+    pub layout: TaffyLayout,
+    #[parent_dep_state(style)]
+    pub style: StyleModifier,
+    #[node_dep_state()]
+    pub prevent_default: PreventDefault,
+    #[node_dep_state()]
+    pub focus: Focus,
+    pub focused: bool,
+}
+
+#[derive(PartialEq, Debug, Clone)]
+pub(crate) enum PreventDefault {
+    Focus,
+    KeyPress,
+    KeyRelease,
+    KeyDown,
+    KeyUp,
+    MouseDown,
+    Click,
+    MouseEnter,
+    MouseLeave,
+    MouseOut,
+    Unknown,
+    MouseOver,
+    ContextMenu,
+    Wheel,
+    MouseUp,
+}
+
+impl Default for PreventDefault {
+    fn default() -> Self {
+        PreventDefault::Unknown
+    }
+}
+
+impl NodeDepState for PreventDefault {
+    type Ctx = ();
+
+    type DepState = ();
+
+    const NODE_MASK: dioxus_native_core::node_ref::NodeMask =
+        dioxus_native_core::node_ref::NodeMask::new_with_attrs(
+            dioxus_native_core::node_ref::AttributeMask::Static(&sorted_str_slice!([
+                "dioxus-prevent-default"
+            ])),
+        );
+
+    fn reduce(
+        &mut self,
+        node: dioxus_native_core::node_ref::NodeView,
+        _sibling: &Self::DepState,
+        _ctx: &Self::Ctx,
+    ) -> bool {
+        let new = match node
+            .attributes()
+            .find(|a| a.name == "dioxus-prevent-default")
+            .and_then(|a| a.value.as_text())
+        {
+            Some("onfocus") => PreventDefault::Focus,
+            Some("onkeypress") => PreventDefault::KeyPress,
+            Some("onkeyrelease") => PreventDefault::KeyRelease,
+            Some("onkeydown") => PreventDefault::KeyDown,
+            Some("onkeyup") => PreventDefault::KeyUp,
+            Some("onclick") => PreventDefault::Click,
+            Some("onmousedown") => PreventDefault::MouseDown,
+            Some("onmouseup") => PreventDefault::MouseUp,
+            Some("onmouseenter") => PreventDefault::MouseEnter,
+            Some("onmouseover") => PreventDefault::MouseOver,
+            Some("onmouseleave") => PreventDefault::MouseLeave,
+            Some("onmouseout") => PreventDefault::MouseOut,
+            Some("onwheel") => PreventDefault::Wheel,
+            Some("oncontextmenu") => PreventDefault::ContextMenu,
+            _ => return false,
+        };
+        if new == *self {
+            false
+        } else {
+            *self = new;
+            true
+        }
+    }
+}

packages/tui/src/render.rs

@@ -5,7 +5,7 @@ use taffy::{
     prelude::{Layout, Size},
     Taffy,
 };
-use tui::{backend::CrosstermBackend, layout::Rect};
+use tui::{backend::CrosstermBackend, layout::Rect, style::Color};
 
 use crate::{
     style::{RinkColor, RinkStyle},
@@ -272,6 +272,10 @@ impl RinkWidget for &Node {
                 if let Some(c) = self.state.style.core.bg {
                     new_cell.bg = c;
                 }
+                if self.state.focused {
+                    new_cell.bg.alpha = 100;
+                    new_cell.bg.color = new_cell.bg.blend(Color::White);
+                }
                 buf.set(x, y, new_cell);
             }
         }

packages/tui/src/widget.rs

@@ -57,7 +57,7 @@ impl<T: RinkWidget> WidgetWithContext<T> {
 
 impl<T: RinkWidget> Widget for WidgetWithContext<T> {
     fn render(self, area: Rect, buf: &mut Buffer) {
-        self.widget.render(area, RinkBuffer::new(buf, self.config))
+        self.widget.render(area, RinkBuffer::new(buf, self.config));
     }
 }