webf-sys 0.1.0

Rust bindings to Web API which provided by WebF
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/*
* Copyright (C) 2022-present The WebF authors. All rights reserved.
*/

use std::ffi::{c_double, c_void};
use libc::{boolean_t, c_char};
use crate::executing_context::{ExecutingContext};
use crate::node::{Node, NodeRustMethods};
use crate::OpaquePtr;

#[repr(C)]
pub struct EventListener {
  pub callback: extern "C" fn(event: *const OpaquePtr, exception_state: *const OpaquePtr) -> c_void,
}

#[repr(C)]
pub struct AddEventListenerOptions {
  pub passive: boolean_t,
  pub once: boolean_t,
  pub capture: boolean_t,
}

pub trait RustMethods {}

#[repr(C)]
pub struct EventTargetRustMethods {
  pub version: c_double,
  pub add_event_listener: extern "C" fn(
    event_target: *const OpaquePtr,
    event_name: *const c_char,
    listener: *mut EventListener,
    options: &mut AddEventListenerOptions,
    exception_state: *mut OpaquePtr) -> c_void,
  pub release: extern "C" fn(event_target: *const OpaquePtr),
}

impl RustMethods for EventTargetRustMethods {}


pub struct EventTarget {
  pub ptr: *const OpaquePtr,
  pub context: *const ExecutingContext,
  method_pointer: *const EventTargetRustMethods,
}

pub type EventListenerCallback = fn(name: c_char) -> c_void;

impl EventTarget {
  fn ptr(&self) -> *const OpaquePtr {
    self.ptr
  }

  pub fn add_event_listener(&self, event_name: &str, callback: EventListenerCallback, options: &mut AddEventListenerOptions) {}
}

pub trait EventTargetMethods {
  fn initialize<T: RustMethods>(ptr: *const OpaquePtr, context: *const ExecutingContext, method_pointer: *const T) -> Self where Self: Sized;

  fn ptr(&self) -> *const OpaquePtr;

  // fn add_event_listener(&self, event_name: &str, callback: EventListenerCallback, options: &mut AddEventListenerOptions);
  fn add_event_listener(&self, event_name: &str, callback: crate::event_target::EventListenerCallback, options: &mut AddEventListenerOptions);
}

impl Drop for EventTarget {
  // When the holding on Rust side released, should notify c++ side to release the holder.
  fn drop(&mut self) {
    unsafe {
      ((*self.method_pointer).release)(self.ptr)
    };
  }
}

impl EventTargetMethods for EventTarget {
  /// Initialize the instance from cpp raw pointer.
  fn initialize<T>(ptr: *const OpaquePtr, context: *const ExecutingContext, method_pointer: *const T) -> EventTarget {
    EventTarget {
      ptr,
      context,
      method_pointer: method_pointer as *const EventTargetRustMethods,
    }
  }

  fn ptr(&self) -> *const OpaquePtr {
    self.ptr
  }

  fn add_event_listener(&self, event_name: &str, callback: EventListenerCallback, options: &mut AddEventListenerOptions) {
    self.add_event_listener(event_name, callback, options);
  }
}