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Better printer cropping

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Printer now also crops horizontally.
Also applies to hline and vline.
This commit is contained in:
Alexandre Bury 2015-05-24 01:49:50 -07:00
parent 5d9e8f760b
commit 8780dd1dde
1 changed files with 22 additions and 5 deletions
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27
src/printer.rs
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@ -1,5 +1,7 @@
//! Makes drawing on ncurses windows easier.
use std::cmp::min;
use ncurses;
use color;
@ -24,21 +26,36 @@ impl Printer {
/// Prints some text at the given position relative to the window.
pub fn print<S: ToVec2>(&self, pos: S, text: &str) {
let mut p = pos.to_vec2();
if p.y >= self.size.y { return; }
p = p + self.offset;
let p = pos.to_vec2();
if p.y >= self.size.y || p.x >= self.size.x { return; }
// Do we have enough room for the entire line?
let room = (self.size.x - p.x) as usize;
// We want the number of CHARACTERS, not bytes.
let text = match text.char_indices().nth(room) {
Some((i,_)) => &text[..i],
_ => text,
};
let p = p + self.offset;
ncurses::mvprintw(p.y as i32, p.x as i32, text);
}
/// Prints a vertical line using the given character.
pub fn print_vline<T: ToVec2>(&self, start: T, len: u32, c: u64) {
let p = start.to_vec2() + self.offset;
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;
ncurses::mvvline(p.y as i32, p.x as i32, c, len as i32);
}
/// Prints a horizontal line using the given character.
pub fn print_hline<T: ToVec2>(&self, start: T, len: u32, c: u64) {
let p = start.to_vec2() + self.offset;
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;
ncurses::mvhline(p.y as i32, p.x as i32, c, len as i32);
}