618 lines
20 KiB
Rust
618 lines
20 KiB
Rust
use std::ffi::c_void;
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use cocoa::appkit::{NSEvent, NSFilenamesPboardType, NSView, NSWindow};
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use cocoa::base::{id, nil, BOOL, NO, YES};
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use cocoa::foundation::{NSArray, NSPoint, NSRect, NSSize, NSUInteger};
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use objc::{
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class,
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declare::ClassDecl,
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msg_send,
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runtime::{Class, Object, Sel},
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sel, sel_impl,
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};
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use uuid::Uuid;
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use crate::MouseEvent::{ButtonPressed, ButtonReleased};
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use crate::{
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DropData, DropEffect, Event, EventStatus, MouseButton, MouseEvent, Point, ScrollDelta, Size,
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WindowEvent, WindowInfo, WindowOpenOptions,
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};
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use super::keyboard::{from_nsstring, make_modifiers};
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use super::window::WindowState;
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use super::{
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NSDragOperationCopy, NSDragOperationGeneric, NSDragOperationLink, NSDragOperationMove,
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NSDragOperationNone,
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};
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/// Name of the field used to store the `WindowState` pointer.
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pub(super) const BASEVIEW_STATE_IVAR: &str = "baseview_state";
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#[link(name = "AppKit", kind = "framework")]
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extern "C" {
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static NSWindowDidBecomeKeyNotification: id;
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static NSWindowDidResignKeyNotification: id;
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}
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macro_rules! add_simple_mouse_class_method {
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($class:ident, $sel:ident, $event:expr) => {
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#[allow(non_snake_case)]
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extern "C" fn $sel(this: &Object, _: Sel, _: id){
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let state = unsafe { WindowState::from_view(this) };
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state.trigger_event(Event::Mouse($event));
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}
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$class.add_method(
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sel!($sel:),
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$sel as extern "C" fn(&Object, Sel, id),
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);
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};
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}
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/// Similar to [add_simple_mouse_class_method!], but this creates its own event object for the
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/// press/release event and adds the active modifier keys to that event.
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macro_rules! add_mouse_button_class_method {
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($class:ident, $sel:ident, $event_ty:ident, $button:expr) => {
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#[allow(non_snake_case)]
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extern "C" fn $sel(this: &Object, _: Sel, event: id){
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let state = unsafe { WindowState::from_view(this) };
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let modifiers = unsafe { NSEvent::modifierFlags(event) };
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state.trigger_event(Event::Mouse($event_ty {
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button: $button,
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modifiers: make_modifiers(modifiers),
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}));
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}
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$class.add_method(
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sel!($sel:),
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$sel as extern "C" fn(&Object, Sel, id),
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);
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};
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}
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macro_rules! add_simple_keyboard_class_method {
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($class:ident, $sel:ident) => {
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#[allow(non_snake_case)]
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extern "C" fn $sel(this: &Object, _: Sel, event: id){
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let state = unsafe { WindowState::from_view(this) };
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if let Some(key_event) = state.process_native_key_event(event){
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let status = state.trigger_event(Event::Keyboard(key_event));
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if let EventStatus::Ignored = status {
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unsafe {
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let superclass = msg_send![this, superclass];
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let () = msg_send![super(this, superclass), $sel:event];
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}
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}
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}
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}
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$class.add_method(
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sel!($sel:),
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$sel as extern "C" fn(&Object, Sel, id),
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);
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};
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}
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unsafe fn register_notification(observer: id, notification_name: id, object: id) {
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let notification_center: id = msg_send![class!(NSNotificationCenter), defaultCenter];
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let _: () = msg_send![
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notification_center,
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addObserver:observer
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selector:sel!(handleNotification:)
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name:notification_name
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object:object
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];
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}
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pub(super) unsafe fn create_view(window_options: &WindowOpenOptions) -> id {
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let class = create_view_class();
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let view: id = msg_send![class, alloc];
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let size = window_options.size;
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view.initWithFrame_(NSRect::new(NSPoint::new(0., 0.), NSSize::new(size.width, size.height)));
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register_notification(view, NSWindowDidBecomeKeyNotification, nil);
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register_notification(view, NSWindowDidResignKeyNotification, nil);
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let _: id = msg_send![
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view,
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registerForDraggedTypes: NSArray::arrayWithObjects(nil, &[NSFilenamesPboardType])
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];
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view
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}
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unsafe fn create_view_class() -> &'static Class {
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// Use unique class names so that there are no conflicts between different
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// instances. The class is deleted when the view is released. Previously,
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// the class was stored in a OnceCell after creation. This way, we didn't
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// have to recreate it each time a view was opened, but now we don't leave
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// any class definitions lying around when the plugin is closed.
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let class_name = format!("BaseviewNSView_{}", Uuid::new_v4().to_simple());
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let mut class = ClassDecl::new(&class_name, class!(NSView)).unwrap();
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class.add_method(
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sel!(acceptsFirstResponder),
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property_yes as extern "C" fn(&Object, Sel) -> BOOL,
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);
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class.add_method(
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sel!(becomeFirstResponder),
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become_first_responder as extern "C" fn(&Object, Sel) -> BOOL,
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);
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class.add_method(
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sel!(resignFirstResponder),
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resign_first_responder as extern "C" fn(&Object, Sel) -> BOOL,
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);
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class.add_method(sel!(isFlipped), property_yes as extern "C" fn(&Object, Sel) -> BOOL);
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class.add_method(
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sel!(preservesContentInLiveResize),
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property_no as extern "C" fn(&Object, Sel) -> BOOL,
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);
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class.add_method(
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sel!(acceptsFirstMouse:),
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accepts_first_mouse as extern "C" fn(&Object, Sel, id) -> BOOL,
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);
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class.add_method(
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sel!(windowShouldClose:),
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window_should_close as extern "C" fn(&Object, Sel, id) -> BOOL,
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);
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class.add_method(sel!(dealloc), dealloc as extern "C" fn(&mut Object, Sel));
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class.add_method(
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sel!(viewWillMoveToWindow:),
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view_will_move_to_window as extern "C" fn(&Object, Sel, id),
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);
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class.add_method(
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sel!(updateTrackingAreas:),
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update_tracking_areas as extern "C" fn(&Object, Sel, id),
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);
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class.add_method(sel!(mouseMoved:), mouse_moved as extern "C" fn(&Object, Sel, id));
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class.add_method(sel!(mouseDragged:), mouse_moved as extern "C" fn(&Object, Sel, id));
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class.add_method(sel!(rightMouseDragged:), mouse_moved as extern "C" fn(&Object, Sel, id));
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class.add_method(sel!(otherMouseDragged:), mouse_moved as extern "C" fn(&Object, Sel, id));
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class.add_method(sel!(scrollWheel:), scroll_wheel as extern "C" fn(&Object, Sel, id));
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class.add_method(
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sel!(viewDidChangeBackingProperties:),
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view_did_change_backing_properties as extern "C" fn(&Object, Sel, id),
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);
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class.add_method(
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sel!(setFrameSize:),
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set_frame_size as extern "C" fn(&Object, Sel, NSSize),
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);
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class.add_method(
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sel!(draggingEntered:),
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dragging_entered as extern "C" fn(&Object, Sel, id) -> NSUInteger,
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);
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class.add_method(
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sel!(prepareForDragOperation:),
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prepare_for_drag_operation as extern "C" fn(&Object, Sel, id) -> BOOL,
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);
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class.add_method(
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sel!(performDragOperation:),
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perform_drag_operation as extern "C" fn(&Object, Sel, id) -> BOOL,
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);
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class.add_method(
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sel!(draggingUpdated:),
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dragging_updated as extern "C" fn(&Object, Sel, id) -> NSUInteger,
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);
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class.add_method(sel!(draggingExited:), dragging_exited as extern "C" fn(&Object, Sel, id));
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class.add_method(
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sel!(handleNotification:),
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handle_notification as extern "C" fn(&Object, Sel, id),
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);
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add_mouse_button_class_method!(class, mouseDown, ButtonPressed, MouseButton::Left);
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add_mouse_button_class_method!(class, mouseUp, ButtonReleased, MouseButton::Left);
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add_mouse_button_class_method!(class, rightMouseDown, ButtonPressed, MouseButton::Right);
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add_mouse_button_class_method!(class, rightMouseUp, ButtonReleased, MouseButton::Right);
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add_mouse_button_class_method!(class, otherMouseDown, ButtonPressed, MouseButton::Middle);
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add_mouse_button_class_method!(class, otherMouseUp, ButtonReleased, MouseButton::Middle);
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add_simple_mouse_class_method!(class, mouseEntered, MouseEvent::CursorEntered);
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add_simple_mouse_class_method!(class, mouseExited, MouseEvent::CursorLeft);
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add_simple_keyboard_class_method!(class, keyDown);
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add_simple_keyboard_class_method!(class, keyUp);
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add_simple_keyboard_class_method!(class, flagsChanged);
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class.add_ivar::<*mut c_void>(BASEVIEW_STATE_IVAR);
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class.register()
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}
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extern "C" fn property_yes(_this: &Object, _sel: Sel) -> BOOL {
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YES
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}
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extern "C" fn property_no(_this: &Object, _sel: Sel) -> BOOL {
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NO
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}
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extern "C" fn accepts_first_mouse(_this: &Object, _sel: Sel, _event: id) -> BOOL {
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YES
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}
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extern "C" fn become_first_responder(this: &Object, _sel: Sel) -> BOOL {
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let state = unsafe { WindowState::from_view(this) };
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let is_key_window = unsafe {
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let window: id = msg_send![this, window];
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if window != nil {
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let is_key_window: BOOL = msg_send![window, isKeyWindow];
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is_key_window == YES
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} else {
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false
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}
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};
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if is_key_window {
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state.trigger_deferrable_event(Event::Window(WindowEvent::Focused));
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}
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YES
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}
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extern "C" fn resign_first_responder(this: &Object, _sel: Sel) -> BOOL {
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let state = unsafe { WindowState::from_view(this) };
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state.trigger_deferrable_event(Event::Window(WindowEvent::Unfocused));
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YES
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}
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extern "C" fn window_should_close(this: &Object, _: Sel, _sender: id) -> BOOL {
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let state = unsafe { WindowState::from_view(this) };
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state.trigger_event(Event::Window(WindowEvent::WillClose));
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state.window_inner.close();
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NO
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}
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extern "C" fn dealloc(this: &mut Object, _sel: Sel) {
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unsafe {
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let class = msg_send![this, class];
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let superclass = msg_send![this, superclass];
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let () = msg_send![super(this, superclass), dealloc];
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// Delete class
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::objc::runtime::objc_disposeClassPair(class);
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}
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}
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extern "C" fn view_did_change_backing_properties(this: &Object, _: Sel, _: id) {
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unsafe {
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let ns_window: *mut Object = msg_send![this, window];
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let scale_factor: f64 =
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if ns_window.is_null() { 1.0 } else { NSWindow::backingScaleFactor(ns_window) };
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let state = WindowState::from_view(this);
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let bounds: NSRect = msg_send![this, bounds];
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let new_window_info = WindowInfo::from_logical_size(
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Size::new(bounds.size.width, bounds.size.height),
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scale_factor,
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);
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let window_info = state.window_info.get();
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// Only send the event when the window's size has actually changed to be in line with the
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// other platform implementations
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if new_window_info.physical_size() != window_info.physical_size() {
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state.window_info.set(new_window_info);
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state.trigger_event(Event::Window(WindowEvent::Resized(new_window_info)));
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}
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}
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}
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/// Init/reinit tracking area
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///
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/// Info:
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/// https://developer.apple.com/documentation/appkit/nstrackingarea
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/// https://developer.apple.com/documentation/appkit/nstrackingarea/options
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/// https://developer.apple.com/documentation/appkit/nstrackingareaoptions
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unsafe fn reinit_tracking_area(this: &Object, tracking_area: *mut Object) {
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let options: usize = {
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let mouse_entered_and_exited = 0x01;
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let tracking_mouse_moved = 0x02;
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let tracking_cursor_update = 0x04;
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let tracking_active_in_active_app = 0x40;
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let tracking_in_visible_rect = 0x200;
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let tracking_enabled_during_mouse_drag = 0x400;
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mouse_entered_and_exited
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| tracking_mouse_moved
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| tracking_cursor_update
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| tracking_active_in_active_app
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| tracking_in_visible_rect
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| tracking_enabled_during_mouse_drag
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};
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let bounds: NSRect = msg_send![this, bounds];
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*tracking_area = msg_send![tracking_area,
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initWithRect:bounds
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options:options
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owner:this
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userInfo:nil
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];
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}
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extern "C" fn view_will_move_to_window(this: &Object, _self: Sel, new_window: id) {
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unsafe {
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let tracking_areas: *mut Object = msg_send![this, trackingAreas];
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let tracking_area_count = NSArray::count(tracking_areas);
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if new_window == nil {
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if tracking_area_count != 0 {
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let tracking_area = NSArray::objectAtIndex(tracking_areas, 0);
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let _: () = msg_send![this, removeTrackingArea: tracking_area];
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let _: () = msg_send![tracking_area, release];
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}
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} else {
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if tracking_area_count == 0 {
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let class = Class::get("NSTrackingArea").unwrap();
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let tracking_area: *mut Object = msg_send![class, alloc];
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reinit_tracking_area(this, tracking_area);
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let _: () = msg_send![this, addTrackingArea: tracking_area];
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}
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let _: () = msg_send![new_window, setAcceptsMouseMovedEvents: YES];
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let _: () = msg_send![new_window, makeFirstResponder: this];
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}
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}
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unsafe {
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let superclass = msg_send![this, superclass];
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let () = msg_send![super(this, superclass), viewWillMoveToWindow: new_window];
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}
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}
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extern "C" fn update_tracking_areas(this: &Object, _self: Sel, _: id) {
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unsafe {
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let tracking_areas: *mut Object = msg_send![this, trackingAreas];
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let tracking_area = NSArray::objectAtIndex(tracking_areas, 0);
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reinit_tracking_area(this, tracking_area);
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}
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}
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extern "C" fn set_frame_size(this: &Object, _: Sel, new_size: NSSize) {
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unsafe {
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let superclass = msg_send![this, superclass];
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let () = msg_send![super(this, superclass), setFrameSize: new_size];
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}
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let state_ptr: *const c_void = unsafe { *this.get_ivar(BASEVIEW_STATE_IVAR) };
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if state_ptr.is_null() {
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return;
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}
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let state = unsafe { WindowState::from_view(this) };
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let scale_factor = unsafe {
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let ns_window: *mut Object = msg_send![this, window];
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if ns_window.is_null() { 1.0 } else { NSWindow::backingScaleFactor(ns_window) }
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};
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let new_window_info = WindowInfo::from_logical_size(
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Size::new(new_size.width, new_size.height),
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scale_factor,
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);
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let old_info = state.window_info.get();
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if new_window_info.physical_size() != old_info.physical_size() {
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state.window_info.set(new_window_info);
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#[cfg(feature = "opengl")]
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if let Some(gl_context) = &state.window_inner.gl_context {
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gl_context.resize(new_size);
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}
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state.trigger_deferrable_event(Event::Window(WindowEvent::Resized(new_window_info)));
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}
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}
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fn get_screen_position() -> Point {
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unsafe {
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let screen_point: NSPoint = msg_send![class!(NSEvent), mouseLocation];
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let main_screen: id = msg_send![class!(NSScreen), mainScreen];
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let screen_frame: NSRect = msg_send![main_screen, frame];
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Point {
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x: screen_point.x,
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y: screen_frame.size.height - screen_point.y,
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}
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}
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}
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extern "C" fn mouse_moved(this: &Object, _sel: Sel, event: id) {
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let state = unsafe { WindowState::from_view(this) };
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let point: NSPoint = unsafe {
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let point = NSEvent::locationInWindow(event);
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msg_send![this, convertPoint:point fromView:nil]
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};
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let modifiers = unsafe { NSEvent::modifierFlags(event) };
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let position = Point { x: point.x, y: point.y };
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let screen_position = get_screen_position();
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state.trigger_event(Event::Mouse(MouseEvent::CursorMoved {
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position,
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screen_position,
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modifiers: make_modifiers(modifiers),
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}));
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}
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extern "C" fn scroll_wheel(this: &Object, _: Sel, event: id) {
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let state = unsafe { WindowState::from_view(this) };
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let delta = unsafe {
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let x = NSEvent::scrollingDeltaX(event) as f32;
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let y = NSEvent::scrollingDeltaY(event) as f32;
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if NSEvent::hasPreciseScrollingDeltas(event) != NO {
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ScrollDelta::Pixels { x, y }
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} else {
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ScrollDelta::Lines { x, y }
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}
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};
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let modifiers = unsafe { NSEvent::modifierFlags(event) };
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state.trigger_event(Event::Mouse(MouseEvent::WheelScrolled {
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delta,
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modifiers: make_modifiers(modifiers),
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}));
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}
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fn get_drag_position(sender: id) -> (Point, Point) {
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let point: NSPoint = unsafe { msg_send![sender, draggingLocation] };
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(Point::new(point.x, point.y), get_screen_position())
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}
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fn get_drop_data(sender: id) -> DropData {
|
|
if sender == nil {
|
|
return DropData::None;
|
|
}
|
|
|
|
unsafe {
|
|
let pasteboard: id = msg_send![sender, draggingPasteboard];
|
|
let file_list: id = msg_send![pasteboard, propertyListForType: NSFilenamesPboardType];
|
|
|
|
if file_list == nil {
|
|
return DropData::None;
|
|
}
|
|
|
|
let mut files = vec![];
|
|
for i in 0..NSArray::count(file_list) {
|
|
let data = NSArray::objectAtIndex(file_list, i);
|
|
files.push(from_nsstring(data).into());
|
|
}
|
|
|
|
DropData::Files(files)
|
|
}
|
|
}
|
|
|
|
fn on_event(window_state: &WindowState, event: MouseEvent) -> NSUInteger {
|
|
let event_status = window_state.trigger_event(Event::Mouse(event));
|
|
match event_status {
|
|
EventStatus::AcceptDrop(DropEffect::Copy) => NSDragOperationCopy,
|
|
EventStatus::AcceptDrop(DropEffect::Move) => NSDragOperationMove,
|
|
EventStatus::AcceptDrop(DropEffect::Link) => NSDragOperationLink,
|
|
EventStatus::AcceptDrop(DropEffect::Scroll) => NSDragOperationGeneric,
|
|
_ => NSDragOperationNone,
|
|
}
|
|
}
|
|
|
|
extern "C" fn dragging_entered(this: &Object, _sel: Sel, sender: id) -> NSUInteger {
|
|
let state = unsafe { WindowState::from_view(this) };
|
|
let modifiers = state.keyboard_state().last_mods();
|
|
let drop_data = get_drop_data(sender);
|
|
let (position, screen_position) = get_drag_position(sender);
|
|
|
|
let event = MouseEvent::DragEntered {
|
|
position,
|
|
screen_position,
|
|
modifiers: make_modifiers(modifiers),
|
|
data: drop_data,
|
|
};
|
|
|
|
on_event(&state, event)
|
|
}
|
|
|
|
extern "C" fn dragging_updated(this: &Object, _sel: Sel, sender: id) -> NSUInteger {
|
|
let state = unsafe { WindowState::from_view(this) };
|
|
let modifiers = state.keyboard_state().last_mods();
|
|
let drop_data = get_drop_data(sender);
|
|
let (position, screen_position) = get_drag_position(sender);
|
|
|
|
let event = MouseEvent::DragMoved {
|
|
position,
|
|
screen_position,
|
|
modifiers: make_modifiers(modifiers),
|
|
data: drop_data,
|
|
};
|
|
|
|
on_event(&state, event)
|
|
}
|
|
|
|
extern "C" fn prepare_for_drag_operation(_this: &Object, _sel: Sel, _sender: id) -> BOOL {
|
|
// Always accept drag operation if we get this far
|
|
// This function won't be called unless dragging_entered/updated
|
|
// has returned an acceptable operation
|
|
YES
|
|
}
|
|
|
|
extern "C" fn perform_drag_operation(this: &Object, _sel: Sel, sender: id) -> BOOL {
|
|
let state = unsafe { WindowState::from_view(this) };
|
|
let modifiers = state.keyboard_state().last_mods();
|
|
let drop_data = get_drop_data(sender);
|
|
let (position, screen_position) = get_drag_position(sender);
|
|
|
|
let event = MouseEvent::DragDropped {
|
|
position,
|
|
screen_position,
|
|
modifiers: make_modifiers(modifiers),
|
|
data: drop_data,
|
|
};
|
|
|
|
let event_status = state.trigger_event(Event::Mouse(event));
|
|
match event_status {
|
|
EventStatus::AcceptDrop(_) => YES,
|
|
_ => NO,
|
|
}
|
|
}
|
|
|
|
extern "C" fn dragging_exited(this: &Object, _sel: Sel, _sender: id) {
|
|
let state = unsafe { WindowState::from_view(this) };
|
|
|
|
on_event(&state, MouseEvent::DragLeft);
|
|
}
|
|
|
|
extern "C" fn handle_notification(this: &Object, _cmd: Sel, notification: id) {
|
|
unsafe {
|
|
let state = WindowState::from_view(this);
|
|
|
|
// The subject of the notication, in this case an NSWindow object.
|
|
let notification_object: id = msg_send![notification, object];
|
|
|
|
// The NSWindow object associated with our NSView.
|
|
let window: id = msg_send![this, window];
|
|
|
|
let first_responder: id = msg_send![window, firstResponder];
|
|
|
|
// Only trigger focus events if the NSWindow that's being notified about is our window,
|
|
// and if the window's first responder is our NSView.
|
|
// If the first responder isn't our NSView, the focus events will instead be triggered
|
|
// by the becomeFirstResponder and resignFirstResponder methods on the NSView itself.
|
|
if notification_object == window && std::ptr::eq(first_responder, this) {
|
|
let is_key_window: BOOL = msg_send![window, isKeyWindow];
|
|
state.trigger_event(Event::Window(if is_key_window == YES {
|
|
WindowEvent::Focused
|
|
} else {
|
|
WindowEvent::Unfocused
|
|
}));
|
|
}
|
|
}
|
|
}
|