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Remove obsolete presenter modules

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This commit is contained in:
Antonio Scandurra 2023-04-28 17:37:25 +02:00
parent 489b1f6a63
commit 106ebeb386
2 changed files with 0 additions and 409 deletions
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100
crates/gpui/src/presenter/event_context.rs
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@ -1,100 +0,0 @@
use std::ops::{Deref, DerefMut};
use collections::{HashMap, HashSet};
use crate::{Action, ElementBox, Event, FontCache, MutableAppContext, TextLayoutCache};
pub struct EventContext<'a> {
rendered_views: &'a mut HashMap<usize, ElementBox>,
pub font_cache: &'a FontCache,
pub text_layout_cache: &'a TextLayoutCache,
pub app: &'a mut MutableAppContext,
pub window_id: usize,
pub notify_count: usize,
view_stack: Vec<usize>,
pub(crate) handled: bool,
pub(crate) invalidated_views: HashSet<usize>,
}
impl<'a> EventContext<'a> {
pub(crate) fn dispatch_event(&mut self, view_id: usize, event: &Event) -> bool {
if let Some(mut element) = self.rendered_views.remove(&view_id) {
let result =
self.with_current_view(view_id, |this| element.dispatch_event(event, this));
self.rendered_views.insert(view_id, element);
result
} else {
false
}
}
pub(crate) fn with_current_view<F, T>(&mut self, view_id: usize, f: F) -> T
where
F: FnOnce(&mut Self) -> T,
{
self.view_stack.push(view_id);
let result = f(self);
self.view_stack.pop();
result
}
pub fn window_id(&self) -> usize {
self.window_id
}
pub fn view_id(&self) -> Option<usize> {
self.view_stack.last().copied()
}
pub fn is_parent_view_focused(&self) -> bool {
if let Some(parent_view_id) = self.view_stack.last() {
self.app.focused_view_id(self.window_id) == Some(*parent_view_id)
} else {
false
}
}
pub fn focus_parent_view(&mut self) {
if let Some(parent_view_id) = self.view_stack.last() {
self.app.focus(self.window_id, Some(*parent_view_id))
}
}
pub fn dispatch_any_action(&mut self, action: Box<dyn Action>) {
self.app
.dispatch_any_action_at(self.window_id, *self.view_stack.last().unwrap(), action)
}
pub fn dispatch_action<A: Action>(&mut self, action: A) {
self.dispatch_any_action(Box::new(action));
}
pub fn notify(&mut self) {
self.notify_count += 1;
if let Some(view_id) = self.view_stack.last() {
self.invalidated_views.insert(*view_id);
}
}
pub fn notify_count(&self) -> usize {
self.notify_count
}
pub fn propogate_event(&mut self) {
self.handled = false;
}
}
impl<'a> Deref for EventContext<'a> {
type Target = MutableAppContext;
fn deref(&self) -> &Self::Target {
self.app
}
}
impl<'a> DerefMut for EventContext<'a> {
fn deref_mut(&mut self) -> &mut Self::Target {
self.app
}
}

309
crates/gpui/src/presenter/event_dispatcher.rs
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@ -1,309 +0,0 @@
use std::sync::Arc;
use collections::{HashMap, HashSet};
use pathfinder_geometry::vector::Vector2F;
use crate::{
scene::{
ClickRegionEvent, DownOutRegionEvent, DownRegionEvent, DragRegionEvent, HoverRegionEvent,
MouseRegionEvent, MoveRegionEvent, UpOutRegionEvent, UpRegionEvent,
},
CursorRegion, CursorStyle, ElementBox, Event, EventContext, FontCache, MouseButton,
MouseMovedEvent, MouseRegion, MouseRegionId, MutableAppContext, Scene, TextLayoutCache,
};
pub struct EventDispatcher {
window_id: usize,
font_cache: Arc<FontCache>,
last_mouse_moved_event: Option<Event>,
cursor_regions: Vec<CursorRegion>,
mouse_regions: Vec<(MouseRegion, usize)>,
clicked_regions: Vec<MouseRegion>,
clicked_button: Option<MouseButton>,
mouse_position: Vector2F,
hovered_region_ids: HashSet<MouseRegionId>,
}
impl EventDispatcher {
pub fn new(window_id: usize, font_cache: Arc<FontCache>) -> Self {
Self {
window_id,
font_cache,
last_mouse_moved_event: Default::default(),
cursor_regions: Default::default(),
mouse_regions: Default::default(),
clicked_regions: Default::default(),
clicked_button: Default::default(),
mouse_position: Default::default(),
hovered_region_ids: Default::default(),
}
}
pub fn clicked_region_ids(&self) -> Option<(Vec<MouseRegionId>, MouseButton)> {
self.clicked_button.map(|button| {
(
self.clicked_regions
.iter()
.filter_map(MouseRegion::id)
.collect(),
button,
)
})
}
pub fn hovered_region_ids(&self) -> HashSet<MouseRegionId> {
self.hovered_region_ids.clone()
}
pub fn update_mouse_regions(&mut self, scene: &Scene) {
self.cursor_regions = scene.cursor_regions();
self.mouse_regions = scene.mouse_regions();
}
pub fn redispatch_mouse_moved_event<'a>(&'a mut self, cx: &mut EventContext<'a>) {
if let Some(event) = self.last_mouse_moved_event.clone() {
self.dispatch_event(event, true, cx);
}
}
pub fn dispatch_event<'a>(
&'a mut self,
event: Event,
event_reused: bool,
cx: &mut EventContext<'a>,
) -> bool {
let root_view_id = cx.root_view_id(self.window_id);
if root_view_id.is_none() {
return false;
}
let root_view_id = root_view_id.unwrap();
//1. Allocate the correct set of GPUI events generated from the platform events
// -> These are usually small: [Mouse Down] or [Mouse up, Click] or [Mouse Moved, Mouse Dragged?]
// -> Also moves around mouse related state
let events_to_send = self.select_region_events(&event, cx, event_reused);
// For a given platform event, potentially multiple mouse region events can be created. For a given
// region event, dispatch continues until a mouse region callback fails to propogate (handled is set to true)
// If no region handles any of the produced platform events, we fallback to the old dispatch event style.
let mut invalidated_views: HashSet<usize> = Default::default();
let mut any_event_handled = false;
for mut region_event in events_to_send {
//2. Find mouse regions relevant to each region_event. For example, if the event is click, select
// the clicked_regions that overlap with the mouse position
let valid_regions = self.select_relevant_mouse_regions(&region_event);
let hovered_region_ids = self.hovered_region_ids.clone();
//3. Dispatch region event ot each valid mouse region
for valid_region in valid_regions.into_iter() {
region_event.set_region(valid_region.bounds);
if let MouseRegionEvent::Hover(e) = &mut region_event {
e.started = valid_region
.id()
.map(|region_id| hovered_region_ids.contains(&region_id))
.unwrap_or(false)
}
if let Some(callback) = valid_region.handlers.get(&region_event.handler_key()) {
if !event_reused {
invalidated_views.insert(valid_region.view_id);
}
cx.handled = true;
cx.with_current_view(valid_region.view_id, {
let region_event = region_event.clone();
|cx| {
callback(region_event, cx);
}
});
// For bubbling events, if the event was handled, don't continue dispatching
// This only makes sense for local events.
if cx.handled && region_event.is_local() {
break;
}
}
}
// Keep track if any platform event was handled
any_event_handled = any_event_handled && cx.handled;
}
if !any_event_handled {
// No platform event was handled, so fall back to old mouse event dispatch style
any_event_handled = cx.dispatch_event(root_view_id, &event);
}
// Notify any views which have been validated from event callbacks
for view_id in invalidated_views {
cx.notify_view(self.window_id, view_id);
}
any_event_handled
}
fn select_region_events(
&mut self,
event: &Event,
cx: &mut MutableAppContext,
event_reused: bool,
) -> Vec<MouseRegionEvent> {
let mut events_to_send = Vec::new();
match event {
Event::MouseDown(e) => {
//Click events are weird because they can be fired after a drag event.
//MDN says that browsers handle this by starting from 'the most
//specific ancestor element that contained both [positions]'
//So we need to store the overlapping regions on mouse down.
self.clicked_regions = self
.mouse_regions
.iter()
.filter_map(|(region, _)| {
region
.bounds
.contains_point(e.position)
.then(|| region.clone())
})
.collect();
self.clicked_button = Some(e.button);
events_to_send.push(MouseRegionEvent::Down(DownRegionEvent {
region: Default::default(),
platform_event: e.clone(),
}));
events_to_send.push(MouseRegionEvent::DownOut(DownOutRegionEvent {
region: Default::default(),
platform_event: e.clone(),
}));
}
Event::MouseUp(e) => {
//NOTE: The order of event pushes is important! MouseUp events MUST be fired
//before click events, and so the UpRegionEvent events need to be pushed before
//ClickRegionEvents
events_to_send.push(MouseRegionEvent::Up(UpRegionEvent {
region: Default::default(),
platform_event: e.clone(),
}));
events_to_send.push(MouseRegionEvent::UpOut(UpOutRegionEvent {
region: Default::default(),
platform_event: e.clone(),
}));
events_to_send.push(MouseRegionEvent::Click(ClickRegionEvent {
region: Default::default(),
platform_event: e.clone(),
}));
}
Event::MouseMoved(
e @ MouseMovedEvent {
position,
pressed_button,
..
},
) => {
let mut style_to_assign = CursorStyle::Arrow;
for region in self.cursor_regions.iter().rev() {
if region.bounds.contains_point(*position) {
style_to_assign = region.style;
break;
}
}
cx.platform().set_cursor_style(style_to_assign);
if !event_reused {
if pressed_button.is_some() {
events_to_send.push(MouseRegionEvent::Drag(DragRegionEvent {
region: Default::default(),
prev_mouse_position: self.mouse_position,
platform_event: e.clone(),
}));
}
events_to_send.push(MouseRegionEvent::Move(MoveRegionEvent {
region: Default::default(),
platform_event: e.clone(),
}));
}
events_to_send.push(MouseRegionEvent::Hover(HoverRegionEvent {
region: Default::default(),
platform_event: e.clone(),
started: false,
}));
self.last_mouse_moved_event = Some(event.clone());
}
_ => {}
}
if let Some(position) = event.position() {
self.mouse_position = position;
}
events_to_send
}
fn select_relevant_mouse_regions(
&mut self,
region_event: &MouseRegionEvent,
) -> Vec<MouseRegion> {
let mut valid_regions = Vec::new();
//GPUI elements are arranged by depth but sibling elements can register overlapping
//mouse regions. As such, hover events are only fired on overlapping elements which
//are at the same depth as the deepest element which overlaps with the mouse.
if let MouseRegionEvent::Hover(_) = *region_event {
let mut top_most_depth = None;
let mouse_position = self.mouse_position.clone();
for (region, depth) in self.mouse_regions.iter().rev() {
let contains_mouse = region.bounds.contains_point(mouse_position);
if contains_mouse && top_most_depth.is_none() {
top_most_depth = Some(depth);
}
if let Some(region_id) = region.id() {
//This unwrap relies on short circuiting boolean expressions
//The right side of the && is only executed when contains_mouse
//is true, and we know above that when contains_mouse is true
//top_most_depth is set
if contains_mouse && depth == top_most_depth.unwrap() {
//Ensure that hover entrance events aren't sent twice
if self.hovered_region_ids.insert(region_id) {
valid_regions.push(region.clone());
}
} else {
//Ensure that hover exit events aren't sent twice
if self.hovered_region_ids.remove(&region_id) {
valid_regions.push(region.clone());
}
}
}
}
} else if let MouseRegionEvent::Click(e) = region_event {
//Clear stored clicked_regions
let clicked_regions = std::mem::replace(&mut self.clicked_regions, Vec::new());
self.clicked_button = None;
//Find regions which still overlap with the mouse since the last MouseDown happened
for clicked_region in clicked_regions.into_iter().rev() {
if clicked_region.bounds.contains_point(e.position) {
valid_regions.push(clicked_region);
}
}
} else if region_event.is_local() {
for (mouse_region, _) in self.mouse_regions.iter().rev() {
//Contains
if mouse_region.bounds.contains_point(self.mouse_position) {
valid_regions.push(mouse_region.clone());
}
}
} else {
for (mouse_region, _) in self.mouse_regions.iter().rev() {
//NOT contains
if !mouse_region.bounds.contains_point(self.mouse_position) {
valid_regions.push(mouse_region.clone());
}
}
}
valid_regions
}
}