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|
use std::{borrow::Cow, marker::PhantomData};
use tui::{backend::Backend, layout::Rect, style::Style, widgets::Borders, Frame};
use crate::tuine::{
Bounds, DrawContext, Event, LayoutNode, Size, StateContext, Status, TmpComponent,
};
/// A set of styles for a [`Block`].
#[derive(Clone, Debug, Default)]
pub struct StyleSheet {
pub border: Style,
}
/// A [`Block`] is a widget that draws a border around a child [`Component`], as well as optional
/// titles.
pub struct Block<Message, Child>
where
Child: TmpComponent<Message>,
{
_pd: PhantomData<Message>,
child: Option<Child>,
borders: Borders,
style_sheet: StyleSheet,
left_text: Option<Cow<'static, str>>,
right_text: Option<Cow<'static, str>>,
}
impl<Message, Child> Block<Message, Child>
where
Child: TmpComponent<Message>,
{
pub fn with_child(child: Child) -> Self {
Self {
_pd: Default::default(),
child: Some(child),
borders: Borders::all(),
style_sheet: Default::default(),
left_text: None,
right_text: None,
}
}
pub fn child(mut self, child: Option<Child>) -> Self {
self.child = child;
self
}
pub fn style(mut self, style: StyleSheet) -> Self {
self.style_sheet = style;
self
}
fn inner_rect(&self, original: Rect) -> Rect {
let mut inner = original;
if self.borders.intersects(Borders::LEFT) {
inner.x = inner.x.saturating_add(1).min(inner.right());
inner.width = inner.width.saturating_sub(1);
}
if self.borders.intersects(Borders::TOP)
|| self.left_text.is_some()
|| self.right_text.is_some()
{
inner.y = inner.y.saturating_add(1).min(inner.bottom());
inner.height = inner.height.saturating_sub(1);
}
if self.borders.intersects(Borders::RIGHT) {
inner.width = inner.width.saturating_sub(1);
}
if self.borders.intersects(Borders::BOTTOM) {
inner.height = inner.height.saturating_sub(1);
}
inner
}
fn outer_size(&self, original: Size) -> Size {
let mut outer = original;
if self.borders.intersects(Borders::LEFT) {
outer.width = outer.width.saturating_add(1);
}
if self.borders.intersects(Borders::TOP)
|| self.left_text.is_some()
|| self.right_text.is_some()
{
outer.height = outer.height.saturating_add(1);
}
if self.borders.intersects(Borders::RIGHT) {
outer.width = outer.width.saturating_add(1);
}
if self.borders.intersects(Borders::BOTTOM) {
outer.height = outer.height.saturating_add(1);
}
outer
}
}
impl<Message, Child> TmpComponent<Message> for Block<Message, Child>
where
Child: TmpComponent<Message>,
{
fn draw<B>(
&mut self, state_ctx: &mut StateContext<'_>, draw_ctx: &DrawContext<'_>,
frame: &mut Frame<'_, B>,
) where
B: Backend,
{
let rect = draw_ctx.global_rect();
frame.render_widget(
tui::widgets::Block::default()
.borders(self.borders)
.border_style(self.style_sheet.border),
rect,
);
if let Some(child) = &mut self.child {
if let Some(child_draw_ctx) = draw_ctx.children().next() {
child.draw(state_ctx, &child_draw_ctx, frame)
}
}
}
fn on_event(
&mut self, state_ctx: &mut StateContext<'_>, draw_ctx: &DrawContext<'_>, event: Event,
messages: &mut Vec<Message>,
) -> Status {
if let Some(child_draw_ctx) = draw_ctx.children().next() {
if let Some(child) = &mut self.child {
return child.on_event(state_ctx, &child_draw_ctx, event, messages);
}
}
Status::Ignored
}
fn layout(&self, bounds: Bounds, node: &mut LayoutNode) -> crate::tuine::Size {
if let Some(child) = &self.child {
// Reduce bounds based on borders
let inner_rect = self.inner_rect(Rect::new(0, 0, bounds.max_width, bounds.max_height));
let child_bounds = Bounds {
min_width: bounds.min_width,
min_height: bounds.min_height,
max_width: inner_rect.width,
max_height: inner_rect.height,
};
let mut child_node = LayoutNode::default();
let child_size = child.layout(child_bounds, &mut child_node);
child_node.rect = Rect::new(
inner_rect.x,
inner_rect.y,
child_size.width,
child_size.height,
);
node.children = vec![child_node];
self.outer_size(child_size)
} else {
Size {
width: 0,
height: 0,
}
}
}
}
|
