127 lines
3.4 KiB
Rust
127 lines
3.4 KiB
Rust
use crate::arch::interrupts::InterruptIndex;
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use crate::arch::interrupts::PICS;
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use crate::ps2_mouse::{Mouse, MouseState};
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use lazy_static::lazy_static;
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use spin::Mutex;
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use x86_64::instructions::port::PortReadOnly;
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use x86_64::structures::idt::InterruptStackFrame;
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const MOUSE_MAX_X: u16 = 638;
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const MOUSE_MAX_Y: u16 = 478;
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lazy_static! {
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pub static ref _MOUSE: Mutex<Mouse> = Mutex::new(Mouse::new());
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pub static ref MOUSE: Mutex<OnScreenMouse> = Mutex::new(OnScreenMouse::default());
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}
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#[derive(Default)]
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pub struct OnScreenMouse {
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// absolute position on screen
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x: u16,
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// absolute position on screen
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y: u16,
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}
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impl OnScreenMouse {
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pub fn get_x(&self) -> u16 {
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return self.x;
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}
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pub fn get_y(&self) -> u16 {
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return self.y;
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}
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pub fn change_x(&mut self, delta_x: i16) {
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if delta_x.is_negative() {
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self.x = self.x.saturating_sub((-delta_x) as u16)
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} else {
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self.x = self.x.saturating_add(delta_x as u16)
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}
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}
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pub fn change_y(&mut self, delta_y: i16) {
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if delta_y.is_negative() {
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self.y = self.y.saturating_add((-delta_y) as u16)
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} else {
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self.y = self.y.saturating_sub(delta_y as u16)
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}
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}
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pub fn set_x(&mut self, x: u16) {
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if x >= MOUSE_MAX_X {
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self.x = MOUSE_MAX_X - 1;
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} else {
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self.x = x;
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}
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}
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pub fn set_y(&mut self, y: u16) {
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if y >= MOUSE_MAX_Y {
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self.y = MOUSE_MAX_Y - 1;
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} else {
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self.y = y;
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}
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}
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}
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// Initialize the mouse and set the on complete event.
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pub fn init_mouse() {
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let mut mouse = _MOUSE.lock();
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// debug!("Trying to initialize mouse");
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mouse.init().unwrap();
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mouse.set_on_complete(on_complete);
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// info!("Mouse initialized");
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}
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// This will be fired when a packet is finished being processed.
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fn on_complete(mouse_state: MouseState) {
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// how much the cursor has moved
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let delta_x = mouse_state.get_x();
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let delta_y = mouse_state.get_y();
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/*
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trace!("MOUSE CHANGE: X{{{}}} Y{{{}}}", delta_x, delta_y);
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trace!(
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"MOUSE BUTTONS: LEFT{{{}}} RIGHT{{{}}}",
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mouse_state._left_button_down(),
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mouse_state._right_button_down()
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);
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*/
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let mut mouse = MOUSE.lock();
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if mouse.get_x() >= MOUSE_MAX_X {
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mouse.set_x(MOUSE_MAX_X - 1);
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} else {
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mouse.change_x(delta_x);
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}
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if mouse.get_y() >= MOUSE_MAX_Y {
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mouse.set_y(MOUSE_MAX_Y - 1);
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} else {
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mouse.change_y(delta_y);
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}
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// only move the cursor when delta_x is in some range
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// i.e. if the cursor moves too fast, ignore it.
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// if the mouse moves too fast the delta will overflow
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mouse.change_y(delta_y);
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x86_64::instructions::interrupts::without_interrupts(|| {
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// use crate::TERM;
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// let mut term = TERM.lock();
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// term.set_dirty(true);
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});
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// draw_mouse((mouse.get_x() as usize, mouse.get_y() as usize));
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}
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// An example interrupt based on https://os.phil-opp.com/hardware-interrupts/.
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// The ps2 mouse is configured to fire
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// interrupts at PIC offset 12.
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pub extern "x86-interrupt" fn mouse_interrupt_handler(_stack_frame: InterruptStackFrame) {
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let mut port = PortReadOnly::new(0x60);
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let packet = unsafe { port.read() };
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_MOUSE.lock().process_packet(packet);
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unsafe {
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PICS.lock()
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.notify_end_of_interrupt(InterruptIndex::Mouse as u8);
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}
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}
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