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Draft Viewer trait for markdown

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Héctor Ramón Jiménez 2025-02-04 07:53:56 +01:00
parent c02ae0c4a4
commit 5655998761
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9 changed files with 588 additions and 234 deletions
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24
widget/src/pop.rs
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@ -3,6 +3,7 @@ use crate::core::layout;
use crate::core::mouse;
use crate::core::overlay;
use crate::core::renderer;
use crate::core::text;
use crate::core::widget;
use crate::core::widget::tree::{self, Tree};
use crate::core::window;
@ -17,6 +18,7 @@ use crate::core::{
#[allow(missing_debug_implementations)]
pub struct Pop<'a, Message, Theme = crate::Theme, Renderer = crate::Renderer> {
content: Element<'a, Message, Theme, Renderer>,
key: Option<text::Fragment<'a>>,
on_show: Option<Box<dyn Fn(Size) -> Message + 'a>>,
on_resize: Option<Box<dyn Fn(Size) -> Message + 'a>>,
on_hide: Option<Message>,
@ -34,6 +36,7 @@ where
) -> Self {
Self {
content: content.into(),
key: None,
on_show: None,
on_resize: None,
on_hide: None,
@ -66,6 +69,14 @@ where
self
}
/// Sets the key of the [`Pop`] widget, for continuity.
///
/// If the key changes, the [`Pop`] widget will trigger again.
pub fn key(mut self, key: impl text::IntoFragment<'a>) -> Self {
self.key = Some(key.into_fragment());
self
}
/// Sets the distance in [`Pixels`] to use in anticipation of the
/// content popping into view.
///
@ -77,10 +88,11 @@ where
}
}
#[derive(Debug, Clone, Copy, Default)]
#[derive(Debug, Clone, Default)]
struct State {
has_popped_in: bool,
last_size: Option<Size>,
last_key: Option<String>,
}
impl<Message, Theme, Renderer> Widget<Message, Theme, Renderer>
@ -118,8 +130,16 @@ where
) {
if let Event::Window(window::Event::RedrawRequested(_)) = &event {
let state = tree.state.downcast_mut::<State>();
let bounds = layout.bounds();
if state.has_popped_in
&& state.last_key.as_deref() != self.key.as_deref()
{
state.has_popped_in = false;
state.last_key =
self.key.as_ref().cloned().map(text::Fragment::into_owned);
}
let bounds = layout.bounds();
let top_left_distance = viewport.distance(bounds.position());
let bottom_right_distance = viewport