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/* LICENSE BEGIN
    This file is part of the SixtyFPS Project -- https://sixtyfps.io
    Copyright (c) 2021 Olivier Goffart <olivier.goffart@sixtyfps.io>
    Copyright (c) 2021 Simon Hausmann <simon.hausmann@sixtyfps.io>

    SPDX-License-Identifier: GPL-3.0-only
    This file is also available under commercial licensing terms.
    Please contact info@sixtyfps.io for more information.
LICENSE END */
//! Functions useful for testing
#![warn(missing_docs)]
#![allow(unsafe_code)]

use crate::input::{KeyEvent, KeyEventType, KeyboardModifiers, MouseEvent};
use crate::window::WindowRc;
use crate::SharedString;

/// SixtyFPS animations do not use real time, but use a mocked time.
/// Normally, the event loop update the time of the animation using
/// real time, but in tests, it is more convenient to use the fake time.
/// This function will add some milliseconds to the fake time
#[no_mangle]
pub extern "C" fn sixtyfps_mock_elapsed_time(time_in_ms: u64) {
    crate::animations::CURRENT_ANIMATION_DRIVER.with(|driver| {
        let mut tick = driver.current_tick();
        tick += instant::Duration::from_millis(time_in_ms);
        driver.update_animations(tick)
    })
}

/// Simulate a click on a position within the component.
#[no_mangle]
pub extern "C" fn sixtyfps_send_mouse_click(
    component: &crate::component::ComponentRc,
    x: f32,
    y: f32,
    window: &WindowRc,
) {
    let mut state = crate::input::MouseInputState::default();
    let pos = euclid::point2(x, y);

    state = crate::input::process_mouse_input(
        component.clone(),
        MouseEvent::MouseMoved { pos },
        window,
        state,
    );
    state = crate::input::process_mouse_input(
        component.clone(),
        MouseEvent::MousePressed { pos },
        window,
        state,
    );
    sixtyfps_mock_elapsed_time(50);
    crate::input::process_mouse_input(
        component.clone(),
        MouseEvent::MouseReleased { pos },
        window,
        state,
    );
}

/// Simulate a character input event.
#[no_mangle]
pub extern "C" fn send_keyboard_string_sequence(
    sequence: &crate::SharedString,
    modifiers: KeyboardModifiers,
    window: &WindowRc,
) {
    for ch in sequence.chars() {
        let mut modifiers = modifiers;
        if ch.is_ascii_uppercase() {
            modifiers.shift = true;
        }
        let text: SharedString = ch.to_string().into();

        window.clone().process_key_input(&KeyEvent {
            event_type: KeyEventType::KeyPressed,
            text: text.clone(),
            modifiers,
        });
        window.clone().process_key_input(&KeyEvent {
            event_type: KeyEventType::KeyReleased,
            text,
            modifiers,
        });
    }
}

cfg_if::cfg_if! {
    if #[cfg(target_arch = "wasm32")] {
        use wasm_bindgen::prelude::*;

        #[wasm_bindgen]
        extern "C" {
            #[wasm_bindgen(js_namespace = console)]
            pub fn log(s: &str);
        }

        #[macro_export]
        macro_rules! debug_log {
            ($($t:tt)*) => ($crate::tests::log(&format_args!($($t)*).to_string()))
        }
    } else {
        /// This macro allows producing debug output that will appear on stderr in regular builds
        /// and in the console log for wasm builds.
        #[macro_export]
        macro_rules! debug_log {
            ($($t:tt)*) => (eprintln!($($t)*))
        }
    }
}