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use event::{Event, EventResult};
use theme::ColorStyle;
use vec::Vec2;
use view::{View, ViewWrapper};
use Printer;
pub struct ShadowView<T: View> {
view: T,
top_padding: bool,
left_padding: bool,
}
impl<T: View> ShadowView<T> {
pub fn new(view: T) -> Self {
ShadowView {
view,
top_padding: true,
left_padding: true,
}
}
fn padding(&self) -> Vec2 {
self.top_left_padding() + (1, 1)
}
fn top_left_padding(&self) -> Vec2 {
Vec2::new(self.left_padding as usize, self.top_padding as usize)
}
pub fn left_padding(mut self, value: bool) -> Self {
self.left_padding = value;
self
}
pub fn top_padding(mut self, value: bool) -> Self {
self.top_padding = value;
self
}
inner_getters!(self.view: T);
}
impl<T: View> ViewWrapper for ShadowView<T> {
wrap_impl!(self.view: T);
fn wrap_required_size(&mut self, req: Vec2) -> Vec2 {
let offset = self.padding();
self.view.required_size(req.saturating_sub(offset)) + offset
}
fn wrap_layout(&mut self, size: Vec2) {
let offset = self.padding();
self.view.layout(size.saturating_sub(offset));
}
fn wrap_on_event(&mut self, event: Event) -> EventResult {
let padding = self.top_left_padding();
self.view.on_event(event.relativized(padding))
}
fn wrap_draw(&self, printer: &Printer) {
if printer.size.y <= self.top_padding as usize
|| printer.size.x <= self.left_padding as usize
{
return;
}
let offset =
Vec2::new(self.left_padding as usize, self.top_padding as usize);
let printer = &printer.offset(offset);
if printer.theme.shadow {
let h = printer.size.y;
let w = printer.size.x;
if h == 0 || w == 0 {
return;
}
printer.with_color(ColorStyle::shadow(), |printer| {
printer.print_hline((1, h - 1), w - 1, " ");
printer.print_vline((w - 1, 1), h - 1, " ");
});
}
let printer = printer.shrinked((1, 1));
self.view.draw(&printer);
}
}