60 lines
1.3 KiB
Rust
60 lines
1.3 KiB
Rust
/*!
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Simple type definitions and macro helper for a (x,y) position on the terminal and the areas they define.
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An `Area` consists of two points: the upper left and bottom right corners.
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*/
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/// A `(x, y)` position on screen.
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pub type Pos = (usize, usize);
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#[inline(always)]
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pub fn get_x(p: Pos) -> usize {
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p.0
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}
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#[inline(always)]
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pub fn get_y(p: Pos) -> usize {
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p.1
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}
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#[inline(always)]
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pub fn set_x(p: Pos, new_x: usize) -> Pos {
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(new_x, p.1)
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}
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#[inline(always)]
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pub fn set_y(p: Pos, new_y: usize) -> Pos {
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(p.0, new_y)
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}
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/// An `Area` consists of two points: the upper left and bottom right corners.
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pub type Area = (Pos, Pos);
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#[macro_export]
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macro_rules! upper_left { ($a:expr) => ( $a.0 ) }
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#[macro_export]
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macro_rules! bottom_right { ($a:expr) => ( $a.1 ) }
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#[macro_export]
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macro_rules! is_valid_area { ($a:expr) =>
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{
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{
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let upper_left = upper_left!($a);
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let bottom_right = bottom_right!($a);
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if get_y(upper_left) > get_y(bottom_right) || get_x(upper_left) > get_x(bottom_right) {
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false
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} else {
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true
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}
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}
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}
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}
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/// A `(cols, rows)` size.
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pub type Size = (usize, usize);
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pub trait HasSize {
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fn size(&self) -> Size;
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}
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pub trait HasPosition {
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fn origin(&self) -> Pos;
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fn set_origin(&mut self, new_origin: Pos);
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}
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