1mod event;
 2#[cfg(target_os = "macos")]
 3pub mod mac;
 4pub mod current {
 5    #[cfg(target_os = "macos")]
 6    pub use super::mac::*;
 7}
 8
 9use crate::{
10    executor,
11    fonts::{FontId, GlyphId, Metrics as FontMetrics, Properties as FontProperties},
12    geometry::{
13        rect::{RectF, RectI},
14        vector::Vector2F,
15    },
16    text_layout::Line,
17    Scene,
18};
19use anyhow::Result;
20use async_task::Runnable;
21pub use event::Event;
22use std::{ops::Range, path::PathBuf, rc::Rc, sync::Arc};
23
24pub trait Runner {
25    fn on_finish_launching<F: 'static + FnOnce()>(self, callback: F) -> Self where;
26    fn on_become_active<F: 'static + FnMut()>(self, callback: F) -> Self;
27    fn on_resign_active<F: 'static + FnMut()>(self, callback: F) -> Self;
28    fn on_event<F: 'static + FnMut(Event) -> bool>(self, callback: F) -> Self;
29    fn on_open_files<F: 'static + FnMut(Vec<PathBuf>)>(self, callback: F) -> Self;
30    fn run(self);
31}
32
33pub trait App {
34    fn dispatcher(&self) -> Arc<dyn Dispatcher>;
35    fn activate(&self, ignoring_other_apps: bool);
36    fn open_window(
37        &self,
38        options: WindowOptions,
39        executor: Rc<executor::Foreground>,
40    ) -> Result<Box<dyn Window>>;
41    fn fonts(&self) -> Arc<dyn FontSystem>;
42}
43
44pub trait Dispatcher: Send + Sync {
45    fn is_main_thread(&self) -> bool;
46    fn run_on_main_thread(&self, task: Runnable);
47}
48
49pub trait Window: WindowContext {
50    fn on_event(&mut self, callback: Box<dyn FnMut(Event)>);
51    fn on_resize(&mut self, callback: Box<dyn FnMut(&mut dyn WindowContext)>);
52}
53
54pub trait WindowContext {
55    fn size(&self) -> Vector2F;
56    fn scale_factor(&self) -> f32;
57    fn present_scene(&mut self, scene: Scene);
58}
59
60pub struct WindowOptions<'a> {
61    pub bounds: RectF,
62    pub title: Option<&'a str>,
63}
64
65pub trait FontSystem: Send + Sync {
66    fn load_family(&self, name: &str) -> anyhow::Result<Vec<FontId>>;
67    fn select_font(
68        &self,
69        font_ids: &[FontId],
70        properties: &FontProperties,
71    ) -> anyhow::Result<FontId>;
72    fn font_metrics(&self, font_id: FontId) -> FontMetrics;
73    fn typographic_bounds(&self, font_id: FontId, glyph_id: GlyphId) -> anyhow::Result<RectF>;
74    fn glyph_for_char(&self, font_id: FontId, ch: char) -> Option<GlyphId>;
75    fn rasterize_glyph(
76        &self,
77        font_id: FontId,
78        font_size: f32,
79        glyph_id: GlyphId,
80        subpixel_shift: Vector2F,
81        scale_factor: f32,
82    ) -> Option<(RectI, Vec<u8>)>;
83    fn layout_str(&self, text: &str, font_size: f32, runs: &[(Range<usize>, FontId)]) -> Line;
84}