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use std::cmp::min;
use backend::Backend;
use B;
use theme::{ColorStyle, Effect, Theme};
use vec::{ToVec2, Vec2};
#[derive(Clone)]
pub struct Printer {
pub offset: Vec2,
pub size: Vec2,
pub focused: bool,
pub theme: Theme,
}
impl Printer {
pub fn new<T: ToVec2>(size: T, theme: Theme) -> Self {
Printer {
offset: Vec2::zero(),
size: size.to_vec2(),
focused: true,
theme: theme,
}
}
pub fn print<S: ToVec2>(&self, pos: S, text: &str) {
let p = pos.to_vec2();
if p.y >= self.size.y || p.x >= self.size.x {
return;
}
let room = self.size.x - p.x;
let text = match text.char_indices().nth(room) {
Some((i, _)) => &text[..i],
_ => text,
};
let p = p + self.offset;
if text.contains('%') {
B::print_at((p.x, p.y), &text.replace("%", "%%"));
} else {
B::print_at((p.x, p.y), text);
}
}
pub fn print_vline<T: ToVec2>(&self, start: T, len: usize, c: &str) {
let p = start.to_vec2();
if p.y > self.size.y || p.x > self.size.x {
return;
}
let len = min(len, self.size.y - p.y);
let p = p + self.offset;
for y in 0..len {
B::print_at((p.x, (p.y + y)), c);
}
}
pub fn print_hline<T: ToVec2>(&self, start: T, len: usize, c: &str) {
let p = start.to_vec2();
if p.y > self.size.y || p.x > self.size.x {
return;
}
let len = min(len, self.size.x - p.x);
let p = p + self.offset;
for x in 0..len {
B::print_at((p.x + x, p.y), c);
}
}
pub fn with_color<F>(&self, c: ColorStyle, f: F)
where F: FnOnce(&Printer)
{
B::with_color(c, || f(self));
}
pub fn with_effect<F>(&self, effect: Effect, f: F)
where F: FnOnce(&Printer)
{
B::with_effect(effect, || f(self));
}
pub fn print_box<T: ToVec2>(&self, start: T, size: T) {
let start_v = start.to_vec2();
let size_v = size.to_vec2() - (1, 1);
self.print(start_v, "┌");
self.print(start_v + size_v.keep_x(), "┐");
self.print(start_v + size_v.keep_y(), "└");
self.print(start_v + size_v, "┘");
self.print_hline(start_v + (1, 0), size_v.x - 1, "─");
self.print_vline(start_v + (0, 1), size_v.y - 1, "│");
self.print_hline(start_v + (1, 0) + size_v.keep_y(),
size_v.x - 1,
"─");
self.print_vline(start_v + (0, 1) + size_v.keep_x(),
size_v.y - 1,
"│");
}
pub fn with_selection<F: FnOnce(&Printer)>(&self, selection: bool, f: F) {
self.with_color(if selection {
if self.focused {
ColorStyle::Highlight
} else {
ColorStyle::HighlightInactive
}
} else {
ColorStyle::Primary
},
f);
}
pub fn print_hdelim<T: ToVec2>(&self, start: T, len: usize) {
let start = start.to_vec2();
self.print(start, "├");
self.print_hline(start + (1, 0), len - 2, "─");
self.print(start + (len - 1, 0), "┤");
}
pub fn sub_printer<S: ToVec2>(&self, offset: S, size: S, focused: bool)
-> Printer {
let offset_v = offset.to_vec2();
Printer {
offset: self.offset + offset_v,
size: Vec2::min(self.size - offset_v, size.to_vec2()),
focused: self.focused && focused,
theme: self.theme.clone(),
}
}
}