Add basic inspector

crates/gpui/src/app/window.rs

@@ -51,6 +51,7 @@ pub struct Window {
     pub(crate) parents: HashMap<usize, usize>,
     pub(crate) is_active: bool,
     pub(crate) is_fullscreen: bool,
+    inspector_enabled: bool,
     pub(crate) invalidation: Option<WindowInvalidation>,
     pub(crate) platform_window: Box<dyn platform::Window>,
     pub(crate) rendered_views: HashMap<usize, Box<dyn AnyRootElement>>,
@@ -65,6 +66,7 @@ pub struct Window {
     event_handlers: Vec<EventHandler>,
     last_mouse_moved_event: Option<Event>,
     last_mouse_position: Vector2F,
+    pressed_buttons: HashSet<MouseButton>,
     pub(crate) hovered_region_ids: Vec<MouseRegionId>,
     pub(crate) clicked_region_ids: Vec<MouseRegionId>,
     pub(crate) clicked_region: Option<(MouseRegionId, MouseButton)>,
@@ -92,6 +94,7 @@ impl Window {
             is_active: false,
             invalidation: None,
             is_fullscreen: false,
+            inspector_enabled: false,
             platform_window,
             rendered_views: Default::default(),
             text_style_stack: Vec::new(),
@@ -104,6 +107,7 @@ impl Window {
             text_layout_cache: TextLayoutCache::new(cx.font_system.clone()),
             last_mouse_moved_event: None,
             last_mouse_position: Vector2F::zero(),
+            pressed_buttons: Default::default(),
             hovered_region_ids: Default::default(),
             clicked_region_ids: Default::default(),
             clicked_region: None,
@@ -235,6 +239,18 @@ impl<'a> WindowContext<'a> {
             .push_back(Effect::RepaintWindow { window });
     }
 
+    pub fn enable_inspector(&mut self) {
+        self.window.inspector_enabled = true;
+    }
+
+    pub fn is_inspector_enabled(&self) -> bool {
+        self.window.inspector_enabled
+    }
+
+    pub fn is_mouse_down(&self, button: MouseButton) -> bool {
+        self.window.pressed_buttons.contains(&button)
+    }
+
     pub fn rem_size(&self) -> f32 {
         16.
     }
@@ -521,7 +537,7 @@ impl<'a> WindowContext<'a> {
 
     pub(crate) fn dispatch_event(&mut self, event: Event, event_reused: bool) -> bool {
         if !event_reused {
-            self.dispatch_to_new_event_handlers(&event);
+            self.dispatch_event_2(&event);
         }
 
         let mut mouse_events = SmallVec::<[_; 2]>::new();
@@ -898,12 +914,24 @@ impl<'a> WindowContext<'a> {
         any_event_handled
     }
 
-    fn dispatch_to_new_event_handlers(&mut self, event: &Event) {
+    fn dispatch_event_2(&mut self, event: &Event) {
+        match event {
+            Event::MouseDown(event) => {
+                self.window.pressed_buttons.insert(event.button);
+            }
+            Event::MouseUp(event) => {
+                self.window.pressed_buttons.remove(&event.button);
+            }
+            _ => {}
+        }
+
         if let Some(mouse_event) = event.mouse_event() {
             let event_handlers = self.window.take_event_handlers();
             for event_handler in event_handlers.iter().rev() {
                 if event_handler.event_type == mouse_event.type_id() {
-                    (event_handler.handler)(mouse_event, self);
+                    if !(event_handler.handler)(mouse_event, self) {
+                        break;
+                    }
                 }
             }
             self.window.event_handlers = event_handlers;
@@ -1394,7 +1422,7 @@ pub struct MeasureParams {
     pub available_space: Size<AvailableSpace>,
 }
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub enum AvailableSpace {
     /// The amount of space available is the specified number of pixels
     Pixels(f32),

crates/gpui/src/geometry.rs

@@ -1,3 +1,5 @@
+use std::fmt::Debug;
+
 use super::scene::{Path, PathVertex};
 use crate::{color::Color, json::ToJson};
 pub use pathfinder_geometry::*;
@@ -133,13 +135,14 @@ impl ToJson for RectF {
     }
 }
 
-#[derive(Refineable)]
-pub struct Point<T: Clone + Default> {
+#[derive(Refineable, Debug)]
+#[refineable(debug)]
+pub struct Point<T: Clone + Default + Debug> {
     pub x: T,
     pub y: T,
 }
 
-impl<T: Clone + Default> Clone for Point<T> {
+impl<T: Clone + Default + Debug> Clone for Point<T> {
     fn clone(&self) -> Self {
         Self {
             x: self.x.clone(),
@@ -148,7 +151,7 @@ impl<T: Clone + Default> Clone for Point<T> {
     }
 }
 
-impl<T: Clone + Default> Into<taffy::geometry::Point<T>> for Point<T> {
+impl<T: Clone + Default + Debug> Into<taffy::geometry::Point<T>> for Point<T> {
     fn into(self) -> taffy::geometry::Point<T> {
         taffy::geometry::Point {
             x: self.x,
@@ -157,13 +160,14 @@ impl<T: Clone + Default> Into<taffy::geometry::Point<T>> for Point<T> {
     }
 }
 
-#[derive(Clone, Refineable, Debug)]
-pub struct Size<T: Clone + Default> {
+#[derive(Refineable, Clone, Debug)]
+#[refineable(debug)]
+pub struct Size<T: Clone + Default + Debug> {
     pub width: T,
     pub height: T,
 }
 
-impl<S, T: Clone + Default> From<taffy::geometry::Size<S>> for Size<T>
+impl<S, T: Clone + Default + Debug> From<taffy::geometry::Size<S>> for Size<T>
 where
     S: Into<T>,
 {
@@ -175,7 +179,7 @@ where
     }
 }
 
-impl<S, T: Clone + Default> Into<taffy::geometry::Size<S>> for Size<T>
+impl<S, T: Clone + Default + Debug> Into<taffy::geometry::Size<S>> for Size<T>
 where
     T: Into<S>,
 {
@@ -222,8 +226,9 @@ impl Size<Length> {
     }
 }
 
-#[derive(Clone, Default, Refineable)]
-pub struct Edges<T: Clone + Default> {
+#[derive(Clone, Default, Refineable, Debug)]
+#[refineable(debug)]
+pub struct Edges<T: Clone + Default + Debug> {
     pub top: T,
     pub right: T,
     pub bottom: T,
@@ -323,6 +328,15 @@ pub enum AbsoluteLength {
     Rems(f32),
 }
 
+impl std::fmt::Debug for AbsoluteLength {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            AbsoluteLength::Pixels(pixels) => write!(f, "{}px", pixels),
+            AbsoluteLength::Rems(rems) => write!(f, "{}rems", rems),
+        }
+    }
+}
+
 impl AbsoluteLength {
     pub fn to_pixels(&self, rem_size: f32) -> f32 {
         match self {
@@ -349,7 +363,7 @@ impl Default for AbsoluteLength {
 #[derive(Clone, Copy)]
 pub enum DefiniteLength {
     Absolute(AbsoluteLength),
-    Relative(f32), // Percent, from 0 to 100.
+    Relative(f32), // 0. to 1.
 }
 
 impl DefiniteLength {
@@ -368,6 +382,15 @@ impl DefiniteLength {
     }
 }
 
+impl std::fmt::Debug for DefiniteLength {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            DefiniteLength::Absolute(length) => std::fmt::Debug::fmt(length, f),
+            DefiniteLength::Relative(fract) => write!(f, "{}%", (fract * 100.0) as i32),
+        }
+    }
+}
+
 impl From<AbsoluteLength> for DefiniteLength {
     fn from(length: AbsoluteLength) -> Self {
         Self::Absolute(length)
@@ -387,6 +410,15 @@ pub enum Length {
     Auto,
 }
 
+impl std::fmt::Debug for Length {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Length::Definite(definite_length) => write!(f, "{:?}", definite_length),
+            Length::Auto => write!(f, "auto"),
+        }
+    }
+}
+
 pub fn relative<T: From<DefiniteLength>>(fraction: f32) -> T {
     DefiniteLength::Relative(fraction).into()
 }