penpot/render-wasm/src/view.rs

use skia_safe as skia;

#[derive(Debug, Copy, Clone)]
pub(crate) struct Viewbox {
    pub x: f32,
    pub y: f32,
    pub width: f32,
    pub height: f32,
    pub zoom: f32,
    pub area: skia::Rect,
}

impl Viewbox {
    pub fn set_all(&mut self, zoom: f32, x: f32, y: f32) -> &Self {
        self.x = x;
        self.y = y;
        self.zoom = zoom;
        self.area.set_xywh(
            -self.x,
            -self.y,
            self.width / self.zoom,
            self.height / self.zoom,
        );
        self
    }

    pub fn set_zoom(&mut self, zoom: f32) -> &Self {
        self.zoom = zoom;
        self.area
            .set_wh(self.width / self.zoom, self.height / self.zoom);
        self
    }

    pub fn set_xy(&mut self, x: f32, y: f32) -> &Self {
        self.x = x;
        self.y = y;
        self.area.left = -x;
        self.area.top = -y;
        self
    }

    pub fn set_wh(&mut self, width: f32, height: f32) -> &Self {
        self.width = width;
        self.height = height;
        self.area
            .set_wh(self.width / self.zoom, self.height / self.zoom);
        self
    }
}