82 lines
1.6 KiB
Rust
82 lines
1.6 KiB
Rust
use crate::renderer::{self, Renderer};
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use crate::text::{self, Text};
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use crate::{Background, Font, Point, Rectangle, Size, Vector};
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use std::borrow::Cow;
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/// A renderer that does nothing.
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///
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/// It can be useful if you are writing tests!
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#[derive(Debug, Clone, Copy, Default)]
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pub struct Null;
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impl Null {
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/// Creates a new [`Null`] renderer.
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pub fn new() -> Null {
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Null
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}
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}
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impl Renderer for Null {
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type Theme = ();
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fn with_layer(&mut self, _bounds: Rectangle, _f: impl FnOnce(&mut Self)) {}
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fn with_translation(
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&mut self,
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_translation: Vector,
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_f: impl FnOnce(&mut Self),
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) {
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}
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fn clear(&mut self) {}
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fn fill_quad(
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&mut self,
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_quad: renderer::Quad,
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_background: impl Into<Background>,
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) {
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}
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}
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impl text::Renderer for Null {
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type Font = Font;
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const ICON_FONT: Font = Font::DEFAULT;
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const CHECKMARK_ICON: char = '0';
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const ARROW_DOWN_ICON: char = '0';
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fn default_font(&self) -> Self::Font {
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Font::default()
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}
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fn default_size(&self) -> f32 {
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16.0
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}
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fn load_font(&mut self, _font: Cow<'static, [u8]>) {}
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fn measure(
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&self,
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_content: &str,
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_size: f32,
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_font: Font,
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_bounds: Size,
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) -> (f32, f32) {
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(0.0, 20.0)
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}
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fn hit_test(
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&self,
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_contents: &str,
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_size: f32,
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_font: Self::Font,
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_bounds: Size,
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_point: Point,
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_nearest_only: bool,
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) -> Option<text::Hit> {
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None
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}
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fn fill_text(&mut self, _text: Text<'_, Self::Font>) {}
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}
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