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use view::{View, ViewWrapper};
use Printer;
use vec::Vec2;
use theme::ColorStyle;
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: view,
top_padding: true,
left_padding: true,
}
}
fn padding(&self) -> Vec2 {
Vec2::new(1 + self.left_padding as usize,
1 + 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
}
}
impl<T: View> ViewWrapper for ShadowView<T> {
wrap_impl!(&self.view);
fn wrap_get_min_size(&mut self, req: Vec2) -> Vec2 {
let offset = self.padding().or_min(req);
self.view.get_min_size(req - offset) + offset
}
fn wrap_layout(&mut self, size: Vec2) {
let offset = self.padding().or_min(size);
self.view.layout(size - offset);
}
fn wrap_draw(&self, printer: &Printer) {
if printer.size.y == 0 || printer.size.x == 0 {
return;
}
let offset = Vec2::new(self.left_padding as usize,
self.top_padding as usize);
let printer = &printer.offset(offset, true);
for y in 0..printer.size.y - 1 {
printer.print_hline((0, y), printer.size.x - 1, " ");
}
self.view.draw(&printer.sub_printer(Vec2::zero(),
printer.size - (1, 1),
true));
if printer.theme.shadow {
let h = printer.size.y;
let w = printer.size.x;
printer.with_color(ColorStyle::Shadow, |printer| {
printer.print_hline((1, h - 1), w - 1, " ");
printer.print_vline((w - 1, 1), h - 1, " ");
});
}
}
}