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use crate::prelude::*;
use seed::prelude::{
ev, keyboard_ev, mouse_ev, pointer_ev, web_sys, El, EventHandler, JsCast, Node,
};
use std::any::{Any, TypeId};
pub use seed::prelude::Ev;
macro_rules! events_api {
( $( $event:ident: $ty:ty { $( $(#[$doc:meta])* $name:ident = $ev:expr $(,)? )* } $(,)? )* ) => {
pub trait EventsApi<Msg: 'static> {
$(
$(
$( #[$doc] )*
fn $name<EMsg: 'static>(self, handler: impl FnOnce($ty) -> EMsg + 'static + Clone) -> Self;
)*
)*
}
impl<Msg: 'static> EventsApi<Msg> for El<Msg> {
$(
$(
fn $name<EMsg: 'static>(mut self, handler: impl FnOnce($ty) -> EMsg + 'static + Clone) -> Self {
self.add_event_handler($event($ev, handler));
self
}
)*
)*
}
impl<Msg: 'static> EventsApi<Msg> for Node<Msg> {
$(
$(
fn $name<EMsg: 'static>(self, handler: impl FnOnce($ty) -> EMsg + 'static + Clone) -> Self {
self.and_el(|el| el.$name(handler))
}
)*
)*
}
}
}
events_api! {
ev: web_sys::Event {
on_scroll = Ev::Scroll,
on_after_print = Ev::AfterPrint,
on_before_print = Ev::BeforePrint,
on_app_installed = Ev::from("appinstalled"),
on_seeked = Ev::Seeked,
on_seeking = Ev::Seeking,
on_play = Ev::Play,
on_playing = Ev::Playing,
on_rate_change = Ev::RateChange,
on_can_play = Ev::CanPlay,
on_can_play_through = Ev::CanPlayThrough,
on_reset = Ev::from("reset"),
on_change = Ev::Change,
on_load = Ev::Load,
on_unload = Ev::Unload,
on_abort = Ev::Abort,
on_error = Ev::Error,
on_emptied = Ev::Emptied,
on_ended = Ev::Ended,
on_full_screen_change = Ev::FullScreenChange,
on_full_screen_error = Ev::FullScreenError,
on_invalid = Ev::from("invalid"),
on_offline = Ev::Offline,
on_online = Ev::Online,
on_select_start = Ev::from("selectstart"),
on_selectionchange = Ev::from("selectionchange"),
on_submit = Ev::Submit,
}
focus_ev: web_sys::FocusEvent {
on_blur = Ev::Blur,
on_focus = Ev::Focus,
on_focus_in = Ev::from("focusin"),
on_focus_out = Ev::from("focusout"),
}
mouse_ev: web_sys::MouseEvent {
on_aux_click = Ev::AuxClick,
on_click = Ev::Click,
on_double_click = Ev::DblClick,
on_mouse_down = Ev::MouseDown,
on_mouse_enter = Ev::MouseEnter,
on_mouse_leave = Ev::MouseLeave,
on_mouse_move = Ev::MouseMove,
on_mouse_out = Ev::MouseOut,
on_mouse_over = Ev::MouseOver,
on_mouse_up = Ev::MouseUp,
on_context_menu = Ev::ContextMenu,
}
pointer_ev: web_sys::PointerEvent {
on_pointer_cancel = Ev::PointerCancel,
on_pointer_down = Ev::PointerDown,
on_pointer_enter = Ev::PointerEnter,
on_pointer_leave = Ev::PointerLeave,
on_pointer_move = Ev::PointerMove,
on_pointer_out = Ev::PointerOut,
on_pointer_over = Ev::PointerOver,
on_pointer_up = Ev::PointerUp,
on_lost_pointer_capture = Ev::LostPointerCapture,
on_got_pointer_capture = Ev::GotPointerCapture,
}
wheel_ev: web_sys::WheelEvent {
on_wheel = Ev::Wheel,
}
input_ev: web_sys::InputEvent {
on_before_input = Ev::from("beforeinput")
on_input = Ev::Input,
}
keyboard_ev: web_sys::KeyboardEvent {
on_key_down = Ev::KeyDown,
on_key_up = Ev::KeyUp,
}
composition_ev: web_sys::CompositionEvent {
on_composition_start = Ev::CompositionStart,
on_composition_update = Ev::CompositionUpdate,
on_composition_end = Ev::CompositionEnd,
}
drag_ev: web_sys::DragEvent {
on_drag = Ev::Drag,
on_drag_end = Ev::DragEnd,
on_drag_enter = Ev::DragEnter,
on_drag_leave = Ev::DragLeave,
on_drag_over = Ev::DragOver,
on_drag_start = Ev::DragStart,
on_drop = Ev::Drop,
}
ui_ev: web_sys::UiEvent {
on_resize = Ev::Resize,
on_select = Ev::Select,
}
}
macro_rules! event_creator{
( $( $(#[$doc:meta])? $name:ident($ty:ty) $(,)? )* ) => {
$(
$( #[$doc] )?
fn $name<Ms: 'static, HandlerMs: 'static>(
trigger: impl Into<Ev>,
handler: impl FnOnce($ty) -> HandlerMs + 'static + Clone,
) -> EventHandler<Ms> {
let msg_type = TypeId::of::<HandlerMs>();
if msg_type != TypeId::of::<Ms>() && msg_type != TypeId::of::<()>() {
panic!("Handler can return only Ms or ()!");
}
let closure_handler = move |event: web_sys::Event| {
let output = &mut Some(handler.clone()(event.dyn_ref::<$ty>().unwrap().clone())) as &mut dyn Any;
output.downcast_mut::<Option<Ms>>().and_then(Option::take)
};
EventHandler::new(trigger, closure_handler)
}
)*
}
}
event_creator! {
wheel_ev(web_sys::WheelEvent),
composition_ev(web_sys::CompositionEvent),
focus_ev(web_sys::FocusEvent),
drag_ev(web_sys::DragEvent),
input_ev(web_sys::InputEvent),
ui_ev(web_sys::UiEvent),
}