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//! Convert a cursor into an iterator of rects.
use alacritty_terminal::vte::ansi::CursorShape;
use crate::display::color::Rgb;
use crate::display::content::RenderableCursor;
use crate::display::SizeInfo;
use crate::renderer::rects::RenderRect;
/// Trait for conversion into the iterator.
pub trait IntoRects {
/// Consume the cursor for an iterator of rects.
fn rects(self, size_info: &SizeInfo, thickness: f32) -> CursorRects;
}
impl IntoRects for RenderableCursor {
fn rects(self, size_info: &SizeInfo, thickness: f32) -> CursorRects {
let point = self.point();
let x = point.column.0 as f32 * size_info.cell_width() + size_info.padding_x();
let y = point.line as f32 * size_info.cell_height() + size_info.padding_y();
let mut width = size_info.cell_width();
let height = size_info.cell_height();
let thickness = (thickness * width).round().max(1.);
if self.is_wide() {
width *= 2.;
}
let crosshairs = crosshair(x, y, size_info);
let mut shape = match self.shape() {
CursorShape::Beam => beam(x, y, height, thickness, self.color()),
CursorShape::Underline => underline(x, y, width, height, thickness, self.color()),
CursorShape::HollowBlock => hollow(x, y, width, height, thickness, self.color()),
_ => CursorRects::default(),
};
// shape.append(&mut crosshairs);
let mut i = 0;
let mut ci = 0;
while i < shape.rects.len() && ci < crosshairs.len() {
match shape.rects[i] {
None => {
shape.rects[i] = Some(crosshairs[ci]);
ci = ci + 1;
}
Some(_) => {}
}
i = i + 1;
}
shape
}
}
fn abs_rect(x0: f32, y0: f32, x1: f32, y1: f32, color: Rgb, opacity: f32) -> Option<RenderRect> {
if x0 >= x1 || y0 >= y1 {
None
} else {
Some(RenderRect::new(x0, y0, x1 - x0, y1 - y0, color, opacity))
}
}
fn crosshair(x: f32, y: f32, size_info: &SizeInfo) -> Vec<RenderRect> {
let width = size_info.cell_width();
let height = size_info.cell_height();
let y_inner_padding = 2.; // config.y_inner_padding as f32;
let x_inner_padding = 4.; // config.x_inner_padding as f32;
let opacity = 0.05; // config.opacity.as_f32();
let color = Rgb::new(255,255,255); // config.color;
let crosshair_max_height =
20. * size_info.cell_height();
let crosshair_max_width =
40. * size_info.cell_width();
(vec![
abs_rect(
x,
(y - crosshair_max_height).max(0.),
x + width,
y - (size_info.cell_height() * y_inner_padding),
color,
opacity,
),
abs_rect(
x,
y + size_info.cell_height() * (y_inner_padding + 1.),
x + width,
size_info.height().min(y + crosshair_max_height + height),
color,
opacity,
),
abs_rect(
(x - crosshair_max_width).max(0.),
y,
x - (size_info.cell_width() * x_inner_padding),
y + height,
color,
opacity,
),
abs_rect(
x + size_info.cell_width()
* (x_inner_padding + if x_inner_padding > 0. { 1. } else { 0. }),
y,
size_info.width().min(x + crosshair_max_width + width),
y + height,
color,
opacity,
),
])
.into_iter()
.flatten()
.collect::<Vec<RenderRect>>()
}
/// Cursor rect iterator.
#[derive(Default)]
pub struct CursorRects {
rects: [Option<RenderRect>; 8],
index: usize,
}
impl From<RenderRect> for CursorRects {
fn from(rect: RenderRect) -> Self {
Self { rects: [Some(rect), None, None, None, None, None, None, None], index: 0 }
}
}
impl Iterator for CursorRects {
type Item = RenderRect;
fn next(&mut self) -> Option<Self::Item> {
let rect = self.rects.get_mut(self.index)?;
self.index += 1;
rect.take()
}
}
/// Create an iterator yielding a single beam rect.
fn beam(x: f32, y: f32, height: f32, thickness: f32, color: Rgb) -> CursorRects {
RenderRect::new(x, y, thickness, height, color, 1.).into()
}
/// Create an iterator yielding a single underline rect.
fn underline(x: f32, y: f32, width: f32, height: f32, thickness: f32, color: Rgb) -> CursorRects {
let y = y + height - thickness;
RenderRect::new(x, y, width, thickness, color, 1.).into()
}
/// Create an iterator yielding a rect for each side of the hollow block cursor.
fn hollow(x: f32, y: f32, width: f32, height: f32, thickness: f32, color: Rgb) -> CursorRects {
let top_line = RenderRect::new(x, y, width, thickness, color, 1.);
let vertical_y = y + thickness;
let vertical_height = height - 2. * thickness;
let left_line = RenderRect::new(x, vertical_y, thickness, vertical_height, color, 1.);
let bottom_y = y + height - thickness;
let bottom_line = RenderRect::new(x, bottom_y, width, thickness, color, 1.);
let right_x = x + width - thickness;
let right_line = RenderRect::new(right_x, vertical_y, thickness, vertical_height, color, 1.);
CursorRects {
rects: [Some(top_line), Some(bottom_line), Some(left_line), Some(right_line), None, None, None, None],
index: 0,
}
}
|
