ZIm/gpui/src/platform/mac/event.rs
Nathan Sobo 222f9d373d WIP
2021-02-20 16:05:36 -07:00

114 lines
4.8 KiB
Rust

use crate::{geometry::vector::vec2f, keymap::Keystroke, platform::Event};
use cocoa::appkit::{
NSDeleteFunctionKey as DELETE_KEY, NSDownArrowFunctionKey as ARROW_DOWN_KEY,
NSLeftArrowFunctionKey as ARROW_LEFT_KEY, NSPageDownFunctionKey as PAGE_DOWN_KEY,
NSPageUpFunctionKey as PAGE_UP_KEY, NSRightArrowFunctionKey as ARROW_RIGHT_KEY,
NSUpArrowFunctionKey as ARROW_UP_KEY,
};
use cocoa::{
appkit::{NSEvent as _, NSEventModifierFlags, NSEventType},
base::{id, YES},
foundation::NSString as _,
};
use std::{ffi::CStr, os::raw::c_char};
const BACKSPACE_KEY: u16 = 0x7f;
const ENTER_KEY: u16 = 0x0d;
const ESCAPE_KEY: u16 = 0x1b;
impl Event {
pub unsafe fn from_native(native_event: id, window_height: Option<f32>) -> Option<Self> {
let event_type = native_event.eventType();
// Filter out event types that aren't in the NSEventType enum.
// See https://github.com/servo/cocoa-rs/issues/155#issuecomment-323482792 for details.
match event_type as u64 {
0 | 21 | 32 | 33 | 35 | 36 | 37 => {
return None;
}
_ => {}
}
match event_type {
NSEventType::NSKeyDown => {
let modifiers = native_event.modifierFlags();
let unmodified_chars = native_event.charactersIgnoringModifiers();
let unmodified_chars = CStr::from_ptr(unmodified_chars.UTF8String() as *mut c_char)
.to_str()
.unwrap();
let unmodified_chars = if let Some(first_char) = unmodified_chars.chars().next() {
match first_char as u16 {
ARROW_UP_KEY => "up",
ARROW_DOWN_KEY => "down",
ARROW_LEFT_KEY => "left",
ARROW_RIGHT_KEY => "right",
PAGE_UP_KEY => "pageup",
PAGE_DOWN_KEY => "pagedown",
BACKSPACE_KEY => "backspace",
ENTER_KEY => "enter",
DELETE_KEY => "delete",
ESCAPE_KEY => "escape",
_ => unmodified_chars,
}
} else {
return None;
};
let chars = native_event.characters();
let chars = CStr::from_ptr(chars.UTF8String() as *mut c_char)
.to_str()
.unwrap()
.into();
Some(Self::KeyDown {
keystroke: Keystroke {
ctrl: modifiers.contains(NSEventModifierFlags::NSControlKeyMask),
alt: modifiers.contains(NSEventModifierFlags::NSAlternateKeyMask),
shift: modifiers.contains(NSEventModifierFlags::NSShiftKeyMask),
cmd: modifiers.contains(NSEventModifierFlags::NSCommandKeyMask),
key: unmodified_chars.into(),
},
chars,
})
}
NSEventType::NSLeftMouseDown => {
window_height.map(|window_height| Self::LeftMouseDown {
position: vec2f(
native_event.locationInWindow().x as f32,
window_height - native_event.locationInWindow().y as f32,
),
cmd: native_event
.modifierFlags()
.contains(NSEventModifierFlags::NSCommandKeyMask),
})
}
NSEventType::NSLeftMouseUp => window_height.map(|window_height| Self::LeftMouseUp {
position: vec2f(
native_event.locationInWindow().x as f32,
window_height - native_event.locationInWindow().y as f32,
),
}),
NSEventType::NSLeftMouseDragged => {
window_height.map(|window_height| Self::LeftMouseDragged {
position: vec2f(
native_event.locationInWindow().x as f32,
window_height - native_event.locationInWindow().y as f32,
),
})
}
NSEventType::NSScrollWheel => window_height.map(|window_height| Self::ScrollWheel {
position: vec2f(
native_event.locationInWindow().x as f32,
window_height - native_event.locationInWindow().y as f32,
),
delta: vec2f(
native_event.scrollingDeltaX() as f32,
native_event.scrollingDeltaY() as f32,
),
precise: native_event.hasPreciseScrollingDeltas() == YES,
}),
_ => None,
}
}
}