trnovel 0.9.0

Terminal reader for novel
Documentation 
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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144

use ratatui::widgets::{Widget, WidgetRef};
use ratatui::{
    style::Style,
    widgets::{Block, Clear},
};
use ratatui_kit::prelude::*;
use std::{ops::Deref, sync::Arc};
use tui_widget_list::{
    ListBuildContext, ListBuilder, ListState, ListView as TuiListView, ScrollAxis,
};

#[derive(Clone)]
pub struct WidgetWrapper {
    widget: Arc<dyn WidgetRef + Send + Sync>,
}

impl Widget for WidgetWrapper {
    fn render(self, area: ratatui::layout::Rect, buf: &mut ratatui::buffer::Buffer) {
        self.widget.render_ref(area, buf);
    }
}

impl<T> From<T> for WidgetWrapper
where
    T: WidgetRef + Send + Sync + 'static,
{
    fn from(widget: T) -> Self {
        Self {
            widget: Arc::new(widget),
        }
    }
}

impl Deref for WidgetWrapper {
    type Target = dyn WidgetRef + Send + Sync;

    fn deref(&self) -> &Self::Target {
        &*self.widget
    }
}

#[allow(clippy::type_complexity)]
pub struct RenderItem<'a>(
    bool,
    Box<dyn Fn(&ListBuildContext) -> (WidgetWrapper, u16) + Sync + Send + 'a>,
);

impl<'a> RenderItem<'a> {
    pub fn call(&self, ctx: &ListBuildContext) -> (WidgetWrapper, u16) {
        (self.1)(ctx)
    }

    pub fn is_default(&self) -> bool {
        self.0
    }

    pub fn take(&mut self) -> Self {
        std::mem::take(self)
    }
}

impl<'a> Default for RenderItem<'a> {
    fn default() -> Self {
        Self(true, Box::new(|_ctx: &ListBuildContext| (Clear.into(), 0)))
    }
}

impl<F> From<F> for RenderItem<'_>
where
    F: Fn(&ListBuildContext) -> (WidgetWrapper, u16) + Sync + Send + 'static,
{
    fn from(f: F) -> Self {
        Self(false, Box::new(f))
    }
}

#[derive(Default, Props)]
pub struct ListView {
    pub state: Option<State<ListState>>,
    pub scroll_axis: ScrollAxis,
    pub style: Style,
    pub block: Option<Block<'static>>,
    pub scroll_padding: u16,
    pub infinite_scrolling: bool,
    pub render_item: RenderItem<'static>,
    pub item_count: usize,
}

impl Component for ListView {
    type Props<'a>
        = ListView
    where
        Self: 'a;
    fn new(props: &Self::Props<'_>) -> Self {
        Self {
            state: props.state,
            scroll_axis: props.scroll_axis,
            style: props.style,
            block: props.block.clone(),
            scroll_padding: props.scroll_padding,
            infinite_scrolling: props.infinite_scrolling,
            render_item: Default::default(),
            item_count: props.item_count,
        }
    }

    fn update(
        &mut self,
        props: &mut Self::Props<'_>,
        _hooks: ratatui_kit::Hooks,
        _updater: &mut ratatui_kit::ComponentUpdater,
    ) {
        *self = Self {
            state: props.state,
            scroll_axis: props.scroll_axis,
            style: props.style,
            block: props.block.clone(),
            scroll_padding: props.scroll_padding,
            infinite_scrolling: props.infinite_scrolling,
            render_item: props.render_item.take(),
            item_count: props.item_count,
        }
    }

    fn draw(&mut self, drawer: &mut ratatui_kit::ComponentDrawer<'_, '_>) {
        let render_item = self.render_item.take();

        let list_builder = ListBuilder::new(|ctx: &ListBuildContext| render_item.call(ctx));

        let mut list = TuiListView::new(list_builder, self.item_count)
            .style(self.style)
            .infinite_scrolling(self.infinite_scrolling)
            .scroll_axis(self.scroll_axis)
            .scroll_padding(self.scroll_padding);

        if let Some(block) = &self.block {
            list = list.block(block.clone());
        }

        if let Some(state) = &mut self.state {
            drawer.render_stateful_widget(list, drawer.area, &mut state.write_no_update());
        }
    }
}