1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

// Copyright 2024 the Xilem Authors
// SPDX-License-Identifier: Apache-2.0

use accesskit::Role;
use kurbo::Point;
use smallvec::SmallVec;
use vello::Scene;

use crate::widget::{WidgetMut, WidgetPod, WidgetRef};
use crate::{
    AccessCtx, AccessEvent, BoxConstraints, EventCtx, LayoutCtx, LifeCycle, LifeCycleCtx, PaintCtx,
    PointerEvent, Size, StatusChange, TextEvent, Widget,
};

// TODO: This is a hack to provide an accessibility node with a Window type.
// This should eventually be removed.
pub struct RootWidget<W> {
    pub(crate) pod: WidgetPod<W>,
}

impl<W: Widget> RootWidget<W> {
    pub fn new(widget: W) -> RootWidget<W> {
        RootWidget {
            pod: WidgetPod::new(widget),
        }
    }

    // TODO - This help works around impedance mismatch between the types of Xilem and Masonry
    pub fn from_pod(pod: WidgetPod<W>) -> RootWidget<W> {
        RootWidget { pod }
    }
}

impl<W: Widget> WidgetMut<'_, RootWidget<W>> {
    pub fn get_element(&mut self) -> WidgetMut<'_, W> {
        self.ctx.get_mut(&mut self.widget.pod)
    }
}

impl<W: Widget> Widget for RootWidget<W> {
    fn on_pointer_event(&mut self, ctx: &mut EventCtx, event: &PointerEvent) {
        self.pod.on_pointer_event(ctx, event);
    }
    fn on_text_event(&mut self, ctx: &mut EventCtx, event: &TextEvent) {
        self.pod.on_text_event(ctx, event);
    }
    fn on_access_event(&mut self, ctx: &mut EventCtx, event: &AccessEvent) {
        self.pod.on_access_event(ctx, event);
    }

    fn on_status_change(&mut self, _: &mut LifeCycleCtx, _: &StatusChange) {}

    fn lifecycle(&mut self, ctx: &mut LifeCycleCtx, event: &LifeCycle) {
        self.pod.lifecycle(ctx, event);
    }

    fn layout(&mut self, ctx: &mut LayoutCtx, bc: &BoxConstraints) -> Size {
        let size = self.pod.layout(ctx, bc);
        ctx.place_child(&mut self.pod, Point::ORIGIN);
        size
    }

    fn paint(&mut self, ctx: &mut PaintCtx, scene: &mut Scene) {
        self.pod.paint(ctx, scene);
    }

    fn accessibility_role(&self) -> Role {
        Role::Window
    }

    fn accessibility(&mut self, ctx: &mut AccessCtx) {
        self.pod.accessibility(ctx);
    }

    fn children(&self) -> SmallVec<[WidgetRef<'_, dyn Widget>; 16]> {
        let mut vec = SmallVec::new();
        vec.push(self.pod.as_dyn());
        vec
    }
}