1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152

#![cfg(target_os = "android")]
extern crate android_ffi;
// extern {
    // fn cargo_apk_injected_glue_get_native_window() -> *const c_void;
    // fn cargo_apk_injected_glue_add_sender(sender: *mut ());
    // fn cargo_apk_injected_glue_add_sender_missing(sender: *mut ());
    // fn cargo_apk_injected_glue_add_sync_event_handler(sender: *mut ());
    // fn cargo_apk_injected_glue_remove_sync_event_handler(sender: *mut ());
    // fn cargo_apk_injected_glue_set_multitouch(multitouch: bool);
    // fn cargo_apk_injected_glue_write_log(ptr: *const (), len: usize);
    // fn cargo_apk_injected_glue_load_asset(ptr: *const (), len: usize) -> *mut c_void;
    // fn cargo_apk_injected_glue_wake_event_loop();
// }

use std::mem;
use std::os::raw::c_void;
use std::sync::mpsc::Sender;

/// An event triggered by the Android environment.
#[derive(Clone, Copy, Debug)]
pub enum Event {
    EventMotion(Motion),
    EventKeyUp,
    EventKeyDown,
    InitWindow,
    SaveState,
    TermWindow,
    GainedFocus,
    LostFocus,
    InputChanged,
    WindowResized,
    WindowRedrawNeeded,
    ContentRectChanged,
    ConfigChanged,
    LowMemory,
    Start,
    Resume,
    Pause,
    Stop,
    Destroy,
    Wake
}

/// Data about a motion event.
#[derive(Clone, Copy, Debug)]
pub struct Motion {
    pub action: MotionAction,
    pub pointer_id: i32,
    pub x: f32,
    pub y: f32,
}

/// The type of pointer action in a motion event.
#[derive(Clone, Copy, Debug)]
pub enum MotionAction {
    Down,
    Move,
    Up,
    Cancel,
}

pub enum AssetError {
    AssetMissing,
    EmptyBuffer,
}

// Trait used to dispatch sync events from the polling loop thread.
pub trait SyncEventHandler {
    fn handle(&mut self, event: &Event);
}

/// Adds a sender where events will be sent to.
#[inline]
pub fn add_sender(sender: Sender<Event>) {
    unsafe {
        let sender = Box::into_raw(Box::new(sender)) as *mut _;
        android_ffi::cargo_apk_injected_glue_add_sender(sender);
    }
}

/// Adds a SyncEventHandler which will receive sync events from the polling loop.
#[inline]
pub fn add_sync_event_handler(handler: Box<SyncEventHandler>) {
    unsafe {
        let handler = Box::into_raw(Box::new(handler)) as *mut _;
        android_ffi::cargo_apk_injected_glue_add_sync_event_handler(handler);
    }
}

/// Removes a SyncEventHandler.
#[inline]
pub fn remove_sync_event_handler(handler: *const SyncEventHandler) {
    unsafe {
        let handler = Box::into_raw(Box::new(handler)) as *mut _;
        android_ffi::cargo_apk_injected_glue_remove_sync_event_handler(handler);
    }
}

#[inline]
pub fn set_multitouch(multitouch: bool) {
    unsafe {
        android_ffi::cargo_apk_injected_glue_set_multitouch(multitouch);
    }
}

/// Adds a sender where events will be sent to, but also sends
/// any missing events to the sender object.
///
/// The missing events happen when the application starts, but before
/// any senders are registered. Since these might be important to certain
/// applications, this function provides that support.
#[inline]
pub fn add_sender_missing(sender: Sender<Event>) {
    unsafe {
        let sender = Box::into_raw(Box::new(sender)) as *mut _;
        android_ffi::cargo_apk_injected_glue_add_sender_missing(sender);
    }
}

/// Returns a handle to the native window.
#[inline]
pub unsafe fn get_native_window() -> *const c_void {
    android_ffi::cargo_apk_injected_glue_get_native_window()
}

///
#[inline]
pub fn write_log(message: &str) {
    unsafe {
        let (message_ptr, message_len) = mem::transmute(message);
        android_ffi::cargo_apk_injected_glue_write_log(message_ptr, message_len);
    }
}

#[inline]
pub fn load_asset(filename: &str) -> Result<Vec<u8>, AssetError> {
    unsafe {
        let (filename_ptr, filename_len) = mem::transmute(filename);
        let data = android_ffi::cargo_apk_injected_glue_load_asset(filename_ptr, filename_len);
        let data: Box<Result<Vec<u8>, AssetError>> = Box::from_raw(data as *mut _);
        *data
    }
}

// Wakes the event poll asynchronously and sends a Event::Wake event to the senders. 
// This method can be called on any thread. This method returns immediately.
#[inline]
pub fn wake_event_loop() {
    unsafe {
        android_ffi::cargo_apk_injected_glue_wake_event_loop();
    }
}