Add Popover (#6)

Cargo.toml

@@ -20,3 +20,38 @@ anyhow = "1"
 log = "0.4"
 serde = "1.0.203"
 serde_json = "1"
+
+
+[workspace.lints.clippy]
+dbg_macro = "deny"
+todo = "deny"
+
+# Motivation: We use `vec![a..b]` a lot when dealing with ranges in text, so
+# warning on this rule produces a lot of noise.
+single_range_in_vec_init = "allow"
+
+# These are all of the rules that currently have violations in the Zed
+# codebase.
+#
+# We'll want to drive this list down by either:
+# 1. fixing violations of the rule and begin enforcing it
+# 2. deciding we want to allow the rule permanently, at which point
+#    we should codify that separately above.
+#
+# This list shouldn't be added to; it should only get shorter.
+# =============================================================================
+
+# There are a bunch of rules currently failing in the `style` group, so
+# allow all of those, for now.
+style = "allow"
+
+# Individual rules that have violations in the codebase:
+almost_complete_range = "allow"
+arc_with_non_send_sync = "allow"
+borrowed_box = "allow"
+let_underscore_future = "allow"
+map_entry = "allow"
+non_canonical_partial_ord_impl = "allow"
+reversed_empty_ranges = "allow"
+type_complexity = "allow"
+module_inception = "allow"

README.md

@@ -56,6 +56,7 @@ There have a part of UI components from [Zed](https://github.com/zed-industries/
 
 - title_bar
 - picker
+- popover (based on popup_menu)
 
 > I think we can discuss them with Zed team to change the license to MIT or Apache License for share to community.
 

crates/app/Cargo.toml

@@ -9,3 +9,6 @@ anyhow.workspace = true
 rust-embed = "8"
 log.workspace = true
 workspace.workspace = true
+
+[lints]
+workspace = true

crates/ui-story/Cargo.toml

@@ -6,3 +6,6 @@ edition = "2021"
 [dependencies]
 ui.workspace = true
 gpui.workspace = true
+
+[lints]
+workspace = true

crates/ui-story/src/button_story.rs

@@ -5,7 +5,7 @@ use gpui::{
 
 use ui::{
     button::{Button, ButtonSize, ButtonStyle},
-    h_flex, v_flex, Clickable, Disableable as _, Icon, IconName,
+    h_flex, v_flex, Clickable, Disableable as _, Icon, IconName, Selectable,
 };
 
 use super::story_case;
@@ -116,6 +116,26 @@ impl Render for ButtonStory {
                                 .size(ButtonSize::Small)
                                 .on_click(Self::on_click),
                         ),
+                )
+                .child(
+                    h_flex()
+                        .items_center()
+                        .gap_6()
+                        .child(
+                            Button::new("button-6", "Selected Button")
+                                .style(ButtonStyle::Primary)
+                                .selected(true),
+                        )
+                        .child(
+                            Button::new("button-7", "Selected Button")
+                                .style(ButtonStyle::Secondary)
+                                .selected(true),
+                        )
+                        .child(
+                            Button::new("button-8", "Selected Button")
+                                .style(ButtonStyle::Danger)
+                                .selected(true),
+                        ),
                 ),
         )
     }

crates/ui-story/src/checkbox_story.rs

@@ -1,7 +1,4 @@
-use gpui::{
-    div, ClickEvent, IntoElement, ParentElement, Render, RenderOnce, Styled, ViewContext,
-    WindowContext,
-};
+use gpui::{IntoElement, ParentElement, Render, Styled, ViewContext, WindowContext};
 
 use ui::{checkbox::Checkbox, h_flex, v_flex, Disableable as _, Selection};
 

crates/ui-story/src/lib.rs

@@ -3,6 +3,7 @@ mod checkbox_story;
 mod dropdown_story;
 mod input_story;
 mod picker_story;
+mod popover_story;
 mod switch_story;
 mod tooltip_stroy;
 
@@ -25,6 +26,7 @@ use checkbox_story::CheckboxStory;
 use dropdown_story::DropdownStory;
 use input_story::InputStory;
 use picker_story::PickerStory;
+use popover_story::PopoverStory;
 use switch_story::SwitchStory;
 use tooltip_stroy::TooltipStory;
 
@@ -58,6 +60,7 @@ impl StoryContainer {
 impl RenderOnce for StoryContainer {
     fn render(self, _: &mut WindowContext) -> impl IntoElement {
         div()
+            .size_full()
             .flex()
             .flex_col()
             .gap_6()
@@ -83,6 +86,7 @@ enum StoryType {
     Picker,
     Dropdown,
     Tooltip,
+    Popover,
 }
 
 impl Display for StoryType {
@@ -95,6 +99,7 @@ impl Display for StoryType {
             Self::Picker => write!(f, "Picker"),
             Self::Dropdown => write!(f, "Dropdown"),
             Self::Tooltip => write!(f, "Tooltip"),
+            Self::Popover => write!(f, "Popover"),
         }
     }
 }
@@ -109,6 +114,7 @@ pub struct Stories {
     picker_story: View<PickerStory>,
     dropdown_story: View<DropdownStory>,
     tooltip_story: View<TooltipStory>,
+    popover_story: View<PopoverStory>,
 }
 
 impl Stories {
@@ -119,9 +125,10 @@ impl Stories {
             checkbox_story: cx.new_view(|cx| CheckboxStory::new(cx)),
             input_story: cx.new_view(|cx| InputStory::new(cx)),
             switch_story: cx.new_view(|cx| SwitchStory::new(cx)),
-            picker_story: cx.new_view(|cx| PickerStory::new(cx)),
-            dropdown_story: cx.new_view(|cx| DropdownStory::new(cx)),
             tooltip_story: cx.new_view(|_| TooltipStory),
+            picker_story: cx.new_view(PickerStory::new),
+            dropdown_story: cx.new_view(DropdownStory::new),
+            popover_story: cx.new_view(PopoverStory::new),
         }
     }
 
@@ -153,6 +160,7 @@ impl Stories {
                 self.tab("story-picker", StoryType::Picker, None, cx),
                 self.tab("story-dropdown", StoryType::Dropdown, None, cx),
                 self.tab("story-tooltip", StoryType::Tooltip, None, cx),
+                self.tab("story-popover", StoryType::Popover, None, cx),
             ]))
     }
 
@@ -196,6 +204,7 @@ impl Render for Stories {
                 StoryType::Picker => this.child(self.picker_story.clone()),
                 StoryType::Dropdown => this.child(self.dropdown_story.clone()),
                 StoryType::Tooltip => this.child(self.tooltip_story.clone()),
+                StoryType::Popover => this.child(self.popover_story.clone()),
             })
     }
 }

crates/ui-story/src/picker_story.rs

@@ -1,7 +1,6 @@
 use gpui::{
-    actions, div, prelude::FluentBuilder as _, px, Div, Empty, Entity, InteractiveElement as _,
-    IntoElement, ParentElement, Render, SharedString, Styled, Task, View, ViewContext,
-    VisualContext as _, WeakView, WindowContext,
+    actions, div, prelude::FluentBuilder as _, px, InteractiveElement as _, IntoElement,
+    ParentElement, Render, Styled, Task, View, ViewContext, VisualContext as _, WeakView,
 };
 
 use ui::{

crates/ui-story/src/popover_story.rs

@@ -0,0 +1,72 @@
+use gpui::{div, px, Element, IntoElement, ParentElement as _, Render, Styled as _, ViewContext};
+use ui::{
+    button::{Button, ButtonSize},
+    divider::Divider,
+    h_flex,
+    popover::{Popover, PopoverContent},
+    v_flex,
+};
+
+use crate::story_case;
+
+pub struct PopoverStory {}
+
+impl PopoverStory {
+    pub fn new(_: &mut ViewContext<Self>) -> Self {
+        Self {}
+    }
+}
+
+impl Render for PopoverStory {
+    fn render(&mut self, _: &mut ViewContext<Self>) -> impl IntoElement {
+        story_case(
+            "Popover",
+            "Displays rich content in a portal, triggered by a button.",
+        )
+        .child(
+            h_flex().items_center().justify_between().child(
+                Popover::new("info-top-left")
+                    .trigger(Button::new("info", "Top Left").width(px(300.)))
+                    .content(|cx| {
+                        PopoverContent::new(|_| {
+                                v_flex().gap_4().child("Hello, this is a Popover.")
+                                    .child(Divider::horizontal())
+                                    .child(
+                                        Button::new("info1", "Yes")
+                                            .width(px(80.))
+                                            .size(ButtonSize::Small)
+                                    ).into_any()
+                            },
+                            cx,
+                        )
+                    }),
+            ).child(
+                Popover::new("info-top-right")
+                .trigger(Button::new("info", "Top Right").width(px(300.)))
+                .content(|cx| {
+                    PopoverContent::new(|_|
+                        "Hello, this is a Popover.\nYou can click outside to dissmis.".into_any(),
+                        cx,
+                    )
+                }),
+            )
+        )
+        .child(
+            div().absolute().bottom_4().left_0().w_full().h_10().child(
+                h_flex().items_center().justify_between().child(
+                Popover::new("info-bottom-left")
+                    .trigger(Button::new("pop", "Bottom Left").width(px(300.)))
+                    .content(|cx| {
+                        PopoverContent::new(|_| "这是另外一个 Popover。\n你可以点击外部来关闭。\nThis popover has position bottom_4().left_0().w_full().h_10().".into_any(), cx)
+                    })).child(
+                Popover::new("info-bottom-right")
+                    .trigger(Button::new("pop", "Bottom Right").width(px(300.)))
+                    .content(|cx| {
+                        PopoverContent::new(|_| "这是另外一个 Popover。\n你可以点击外部来关闭。\nThis popover has position bottom_4().left_0().w_full().h_10().".into_any(), cx)
+                    }))
+
+
+            ),
+        )
+    }
+}

crates/ui-story/src/switch_story.rs

@@ -21,7 +21,7 @@ pub struct SwitchStory {
 }
 
 impl SwitchStory {
-    pub(crate) fn new(cx: &mut WindowContext) -> Self {
+    pub(crate) fn new(_cx: &mut WindowContext) -> Self {
         Self {
             switch1: false,
             switch2: true,
@@ -98,14 +98,14 @@ impl Render for SwitchStory {
                     card(cx).v_flex()         .items_start().child(title("Disabled Switchs")).child(
                         h_flex().items_center()
                         .gap_6()
-                        .child(Switch::new("switch3").disabled(true).on_click(|ev, cx| {
+                        .child(Switch::new("switch3").disabled(true).on_click(|ev, _| {
                             println!("Switch value changed: {:?}", ev);
                         }))
                         .child(
                             Switch::new("switch3_1").label("Airplane Mode")
                                 .checked(true)
                                 .disabled(true)
-                                .on_click(|ev, cx| {
+                                .on_click(|ev, _| {
                                     println!("Switch value changed: {:?}", ev);
                                 }),
                         ))

crates/ui/Cargo.toml

@@ -13,3 +13,6 @@ wry = "0"
 smallvec = "1.13.2"
 windows = "0.57.0"
 unicode-segmentation = "1.11.0"
+
+[lints]
+workspace = true

crates/ui/src/button.rs

@@ -1,13 +1,12 @@
-use gpui::{
-    div, prelude::FluentBuilder as _, px, AnyElement, ClickEvent, DefiniteLength, Div, ElementId,
-    Hsla, InteractiveElement, IntoElement, MouseButton, ParentElement, RenderOnce, SharedString,
-    StatefulInteractiveElement as _, Styled, WindowContext,
-};
-
 use crate::{
-    h_flex, span,
+    h_flex,
     theme::{ActiveTheme, Colorize as _, ThemeMode},
-    Clickable, Disableable, Icon, IconName, Selectable,
+    Clickable, Disableable, Icon, Selectable,
+};
+use gpui::{
+    div, prelude::FluentBuilder as _, px, ClickEvent, DefiniteLength, Div, ElementId, Hsla,
+    InteractiveElement, IntoElement, MouseButton, ParentElement, RenderOnce, SharedString,
+    StatefulInteractiveElement as _, Styled, WindowContext,
 };
 
 pub enum ButtonRounded {
@@ -134,6 +133,8 @@ impl RenderOnce for Button {
             .flex()
             .items_center()
             .justify_center()
+            .when_some(self.width, |this, width| this.w(width))
+            .when_some(self.height, |this, height| this.h(height))
             .map(|this| match self.size {
                 ButtonSize::Small => this.px_3().py_2().h_6(),
                 ButtonSize::Medium => this.px_4().py_2().h_8(),
@@ -144,7 +145,12 @@ impl RenderOnce for Button {
                 ButtonRounded::Large => this.rounded(px(cx.theme().radius * 2.0)),
                 ButtonRounded::None => this.rounded_none(),
             })
-            .when(!self.disabled, |this| {
+            .when(self.selected, |this| {
+                let selected_style = style.selected(cx);
+                this.bg(selected_style.bg)
+                    .border_color(selected_style.border)
+            })
+            .when(!self.disabled && !self.selected, |this| {
                 this.hover(|this| {
                     let hover_style = style.hovered(cx);
                     this.bg(hover_style.bg).border_color(hover_style.border)
@@ -174,7 +180,13 @@ impl RenderOnce for Button {
             })
             .border_1()
             .map(|this| match theme.mode {
-                ThemeMode::Light => this.shadow_sm(),
+                ThemeMode::Light => {
+                    if self.disabled {
+                        this
+                    } else {
+                        this.shadow_sm()
+                    }
+                }
                 ThemeMode::Dark => this,
             })
             .child({
@@ -251,15 +263,23 @@ impl ButtonStyle {
 
     fn active(&self, cx: &WindowContext) -> ButtonStyles {
         let bg = self.bg_color(cx).darken(0.05);
-        let border = self.border_color(cx).darken(0.05);
+        let border = self.border_color(cx);
         let fg = self.text_color(cx).darken(0.05);
 
         ButtonStyles { bg, border, fg }
     }
 
+    fn selected(&self, cx: &WindowContext) -> ButtonStyles {
+        let bg = self.bg_color(cx).darken(0.07);
+        let border = self.border_color(cx);
+        let fg = self.text_color(cx).darken(0.07);
+
+        ButtonStyles { bg, border, fg }
+    }
+
     fn disabled(&self, cx: &WindowContext) -> ButtonStyles {
-        let bg = self.bg_color(cx).grayscale();
-        let border = self.border_color(cx).grayscale();
+        let bg = self.bg_color(cx).grayscale().opacity(0.9);
+        let border = self.border_color(cx).grayscale().opacity(0.9);
         let fg = self.text_color(cx).grayscale();
 
         ButtonStyles { bg, border, fg }

crates/ui/src/checkbox.rs

@@ -1,12 +1,10 @@
 use gpui::{
-    prelude::FluentBuilder as _, px, svg, ElementId, InteractiveElement, IntoElement,
-    ParentElement, RenderOnce, SharedString, StatefulInteractiveElement as _, Styled as _,
-    WindowContext,
+    prelude::FluentBuilder as _, svg, ElementId, InteractiveElement, IntoElement, ParentElement,
+    RenderOnce, SharedString, StatefulInteractiveElement as _, Styled as _, WindowContext,
 };
 
 use crate::{
     disableable::Disableable,
-    label::Label,
     selectable::{Selectable, Selection},
     stock::{h_flex, v_flex},
     theme::{ActiveTheme, Colorize as _},
@@ -25,7 +23,7 @@ pub struct Checkbox {
 }
 
 impl Checkbox {
-    pub fn new(id: impl Into<ElementId>, cx: &mut WindowContext) -> Self {
+    pub fn new(id: impl Into<ElementId>, _: &mut WindowContext) -> Self {
         Self {
             id: id.into(),
             checked: Selection::Unselected,
@@ -95,7 +93,7 @@ impl RenderOnce for Checkbox {
                     .border_1()
                     .border_color(color)
                     .rounded_sm()
-                    .size(px(16.))
+                    .size_4()
                     .map(|this| match self.checked {
                         Selection::Unselected => this.bg(theme.transparent),
                         _ => this.bg(color),
@@ -123,7 +121,7 @@ impl RenderOnce for Checkbox {
             )
             .map(|this| {
                 if let Some(label) = self.label {
-                    this.child(Label::new(label).text_color(color))
+                    this.child(label).text_color(color)
                 } else {
                     this
                 }

crates/ui/src/divider.rs

@@ -1,5 +1,5 @@
 use gpui::IntoElement;
-use gpui::{div, prelude::FluentBuilder as _, Div, RenderOnce, Styled as _};
+use gpui::{div, prelude::FluentBuilder as _, RenderOnce, Styled as _};
 
 use crate::theme::ActiveTheme;
 use crate::StyledExt as _;

crates/ui/src/dropdown.rs

@@ -1,10 +1,8 @@
-use std::rc::Rc;
-
 use gpui::{
-    actions, div, prelude::FluentBuilder as _, px, AppContext, Div, ElementId, FocusHandle,
+    actions, div, prelude::FluentBuilder as _, px, AppContext, ElementId, FocusHandle,
     FocusableView, InteractiveElement, IntoElement, KeyBinding, ParentElement as _, Render,
-    RenderOnce, SharedString, Stateful, StatefulInteractiveElement as _, Styled as _, View,
-    ViewContext, VisualContext as _, WeakView,
+    SharedString, StatefulInteractiveElement as _, Styled as _, View, ViewContext,
+    VisualContext as _, WeakView,
 };
 
 actions!(dropdown, [Up, Down, Enter, Escape]);
@@ -24,7 +22,7 @@ use crate::{
     list::ListItem,
     picker::{self, Picker, PickerDelegate},
     theme::ActiveTheme,
-    v_flex, Icon, IconName,
+    Icon, IconName,
 };
 
 /// A trait for items that can be displayed in a dropdown.
@@ -96,7 +94,7 @@ where
 
     fn dismissed(&mut self, cx: &mut ViewContext<Picker<Self>>) {
         if let Some(view) = self.dropdown.upgrade() {
-            cx.update_view(&view, |view, cx| {
+            cx.update_view(&view, |view, _| {
                 view.open = false;
             });
         }

crates/ui/src/event.rs

@@ -1,4 +1,4 @@
-use gpui::{ClickEvent, Element, Focusable, InteractiveElement, Stateful, WindowContext};
+use gpui::{ClickEvent, Focusable, InteractiveElement, WindowContext};
 
 pub trait InterativeElementExt: InteractiveElement {
     /// Set the listener for a double click event.

crates/ui/src/icon.rs

@@ -1,7 +1,6 @@
 use crate::theme::ActiveTheme;
 use gpui::{
-    div, rgb, svg, AnyElement, Div, Hsla, InteractiveElement, IntoElement, ParentElement as _,
-    RenderOnce, SharedString, StyleRefinement, Styled, Svg, TextStyle, TextStyleRefinement,
+    svg, AnyElement, Hsla, IntoElement, RenderOnce, SharedString, StyleRefinement, Styled, Svg,
     WindowContext,
 };
 
@@ -33,9 +32,9 @@ impl IconName {
     }
 }
 
-impl Into<Icon> for IconName {
-    fn into(self) -> Icon {
-        Icon::new(self)
+impl From<IconName> for Icon {
+    fn from(val: IconName) -> Self {
+        Icon::new(val)
     }
 }
 
@@ -89,8 +88,8 @@ impl RenderOnce for Icon {
     }
 }
 
-impl Into<AnyElement> for Icon {
-    fn into(self) -> AnyElement {
-        self.into_any_element()
+impl From<Icon> for AnyElement {
+    fn from(val: Icon) -> Self {
+        val.into_any_element()
     }
 }

crates/ui/src/label.rs

@@ -1,7 +1,4 @@
-use gpui::{
-    div, prelude::FluentBuilder as _, px, AbsoluteLength, DefiniteLength, Div, Hsla, IntoElement,
-    ParentElement, RenderOnce, SharedString, Styled, TextStyleRefinement, WindowContext,
-};
+use gpui::{div, Div, IntoElement, ParentElement, RenderOnce, SharedString, Styled, WindowContext};
 
 use crate::theme::ActiveTheme;
 

crates/ui/src/lib.rs

@@ -20,6 +20,7 @@ pub mod dropdown;
 pub mod input;
 pub mod list;
 pub mod picker;
+pub mod popover;
 pub mod switch;
 pub mod tab;
 pub mod tooltip;
@@ -37,4 +38,5 @@ pub fn init(cx: &mut gpui::AppContext) {
     input::init(cx);
     picker::init(cx);
     dropdown::init(cx);
+    popover::init(cx);
 }

crates/ui/src/list/list_item.rs

@@ -1,7 +1,7 @@
 use gpui::{
-    div, prelude::FluentBuilder as _, AnyElement, ClickEvent, Div, ElementId, InteractiveElement,
-    IntoElement, MouseButton, MouseDownEvent, ParentElement, RenderOnce, SharedString, Stateful,
-    StatefulInteractiveElement as _, Style, Styled, WindowContext,
+    prelude::FluentBuilder as _, ClickEvent, Div, ElementId, InteractiveElement, IntoElement,
+    MouseButton, MouseDownEvent, ParentElement, RenderOnce, Stateful,
+    StatefulInteractiveElement as _, Styled, WindowContext,
 };
 
 use crate::{h_flex, theme::ActiveTheme, Disableable, Icon, IconName, Selectable};

crates/ui/src/picker.rs

@@ -67,8 +67,8 @@ pub trait PickerDelegate: Sized + 'static {
         None
     }
 
-    fn confirm(&mut self, secondary: bool, cx: &mut ViewContext<Picker<Self>>) {}
-    fn dismissed(&mut self, cx: &mut ViewContext<Picker<Self>>) {}
+    fn confirm(&mut self, _secondary: bool, _cx: &mut ViewContext<Picker<Self>>) {}
+    fn dismissed(&mut self, _cx: &mut ViewContext<Picker<Self>>) {}
     fn should_dismiss(&self) -> bool {
         true
     }
@@ -94,7 +94,7 @@ pub trait PickerDelegate: Sized + 'static {
     fn separators_after_indices(&self) -> Vec<usize> {
         Vec::new()
     }
-    fn update_matches(&mut self, query: &str, cx: &mut ViewContext<Picker<Self>>) -> Task<()> {
+    fn update_matches(&mut self, _query: &str, _cx: &mut ViewContext<Picker<Self>>) -> Task<()> {
         Task::ready(())
     }
     fn confirm_update_query(&mut self, _cx: &mut ViewContext<Picker<Self>>) -> Option<String> {
@@ -472,7 +472,6 @@ impl<D: PickerDelegate> Picker<D> {
                 self.set_query(text, cx);
                 self.refresh(cx);
             }
-            _ => {}
         }
     }
 }

crates/ui/src/popover.rs

@@ -0,0 +1,319 @@
+use std::{cell::RefCell, rc::Rc};
+
+use crate::theme::ActiveTheme;
+use crate::{Clickable, Selectable, StyledExt};
+use gpui::{
+    actions, anchored, deferred, div, prelude::FluentBuilder as _, AnchorCorner, AnyElement,
+    AppContext, Bounds, DismissEvent, Element, ElementId, EventEmitter, FocusHandle, FocusableView,
+    HitboxId, InteractiveElement, IntoElement, LayoutId, ManagedView, ParentElement, Pixels,
+    Render, Style, Styled, View, ViewContext, VisualContext, WindowContext,
+};
+use gpui::{point, px, DispatchPhase, MouseDownEvent, Point};
+
+actions!(popover, [Dismiss]);
+
+pub trait Triggerable: IntoElement + Clickable + Selectable + 'static {}
+impl<T: IntoElement + Clickable + Selectable + 'static> Triggerable for T {}
+
+pub fn init(_cx: &mut AppContext) {}
+
+pub struct PopoverContent {
+    focus_handle: FocusHandle,
+    content: Rc<dyn Fn(&mut WindowContext) -> AnyElement>,
+}
+
+impl PopoverContent {
+    pub fn new<B>(content: B, cx: &mut WindowContext) -> View<Self>
+    where
+        B: Fn(&mut WindowContext) -> AnyElement + 'static,
+    {
+        cx.new_view(|cx| {
+            let focus_handle = cx.focus_handle();
+
+            Self {
+                focus_handle,
+                content: Rc::new(content),
+            }
+        })
+    }
+}
+impl EventEmitter<DismissEvent> for PopoverContent {}
+
+impl FocusableView for PopoverContent {
+    fn focus_handle(&self, _cx: &AppContext) -> FocusHandle {
+        self.focus_handle.clone()
+    }
+}
+
+impl Render for PopoverContent {
+    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
+        div()
+            .id("test")
+            // .on_action(cx.listener(Self::dissmiss))
+            .absolute()
+            .mt_2()
+            .elevation_2(cx)
+            .bg(cx.theme().popover)
+            .border_1()
+            .border_color(cx.theme().border)
+            .p_4()
+            .max_w_128()
+            .w_80()
+            .occlude()
+            .child(self.content.clone()(cx))
+            .on_mouse_down_out(cx.listener(|_, _, cx| cx.emit(DismissEvent)))
+    }
+}
+
+pub struct Popover<M: ManagedView> {
+    id: ElementId,
+    anchor: AnchorCorner,
+    trigger_builder: Option<
+        Box<
+            dyn FnOnce(
+                    Rc<RefCell<Option<View<M>>>>,
+                    Option<Rc<dyn Fn(&mut WindowContext) -> View<M> + 'static>>,
+                ) -> AnyElement
+                + 'static,
+        >,
+    >,
+    content_builder: Option<Rc<dyn Fn(&mut WindowContext) -> View<M> + 'static>>,
+}
+
+impl<M: ManagedView> Popover<M> {
+    pub fn new(id: impl Into<ElementId>) -> Self {
+        Self {
+            id: id.into(),
+            trigger_builder: None,
+            content_builder: None,
+            anchor: AnchorCorner::TopLeft,
+        }
+    }
+
+    pub fn trigger<T: Triggerable>(mut self, trigger: T) -> Self {
+        self.trigger_builder = Some(Box::new(|popover, builder| {
+            let open = popover.borrow_mut().is_some();
+            trigger
+                .selected(open)
+                .when_some(builder, |this, builder| {
+                    this.on_click(move |_, cx| Self::show_popover(&builder, &popover, cx))
+                })
+                .into_any_element()
+        }));
+
+        self
+    }
+
+    pub fn content(
+        mut self,
+        content_builder: impl Fn(&mut WindowContext) -> View<M> + 'static,
+    ) -> Self {
+        self.content_builder = Some(Rc::new(content_builder));
+        self
+    }
+
+    /// anchor defines which corner of the menu to anchor to the attachment point
+    /// (by default the cursor position, but see attach)
+    pub fn anchor(mut self, anchor: AnchorCorner) -> Self {
+        self.anchor = anchor;
+        self
+    }
+
+    fn show_popover(
+        builder: &Rc<dyn Fn(&mut WindowContext) -> View<M> + 'static>,
+        popover: &Rc<RefCell<Option<View<M>>>>,
+        cx: &mut WindowContext,
+    ) {
+        let new_popover = (builder)(cx);
+
+        let popover_cloned = popover.clone();
+        let prev_focus_handle = cx.focused();
+
+        cx.subscribe(&new_popover, move |modal, _: &DismissEvent, cx| {
+            if modal.focus_handle(cx).contains_focused(cx) {
+                if let Some(prev_focus_handle) = prev_focus_handle.as_ref() {
+                    cx.focus(prev_focus_handle);
+                }
+            }
+            *popover_cloned.borrow_mut() = None;
+            cx.refresh();
+        })
+        .detach();
+
+        cx.focus_view(&new_popover);
+        *popover.borrow_mut() = Some(new_popover);
+        cx.refresh();
+    }
+
+    fn resolved_attach(&self) -> AnchorCorner {
+        match self.anchor {
+            AnchorCorner::TopLeft => AnchorCorner::BottomLeft,
+            AnchorCorner::TopRight => AnchorCorner::BottomRight,
+            AnchorCorner::BottomLeft => AnchorCorner::TopLeft,
+            AnchorCorner::BottomRight => AnchorCorner::TopRight,
+        }
+    }
+
+    fn resolved_offset(&self, _cx: &WindowContext) -> Point<Pixels> {
+        let offset = px(0.);
+        match self.anchor {
+            AnchorCorner::TopRight | AnchorCorner::BottomRight => point(offset, px(0.)),
+            AnchorCorner::TopLeft | AnchorCorner::BottomLeft => point(-offset, px(0.)),
+        }
+    }
+}
+
+pub struct PopoverElementState<M> {
+    trigger_bounds: Option<Bounds<Pixels>>,
+    popover: Rc<RefCell<Option<View<M>>>>,
+}
+
+impl<M> Clone for PopoverElementState<M> {
+    fn clone(&self) -> Self {
+        Self {
+            popover: Rc::clone(&self.popover),
+            trigger_bounds: self.trigger_bounds,
+        }
+    }
+}
+
+impl<M> Default for PopoverElementState<M> {
+    fn default() -> Self {
+        Self {
+            popover: Rc::default(),
+            trigger_bounds: None,
+        }
+    }
+}
+
+pub struct PopoverFrameState {
+    trigger_layout_id: Option<LayoutId>,
+    trigger_element: Option<AnyElement>,
+    popover_element: Option<AnyElement>,
+}
+
+impl<M: ManagedView> IntoElement for Popover<M> {
+    type Element = Self;
+
+    fn into_element(self) -> Self::Element {
+        self
+    }
+}
+
+impl<M: ManagedView> Element for Popover<M> {
+    type RequestLayoutState = PopoverFrameState;
+    type PrepaintState = Option<HitboxId>;
+
+    fn id(&self) -> Option<ElementId> {
+        Some(self.id.clone())
+    }
+
+    fn request_layout(
+        &mut self,
+        global_id: Option<&gpui::GlobalElementId>,
+        cx: &mut WindowContext,
+    ) -> (gpui::LayoutId, Self::RequestLayoutState) {
+        cx.with_element_state(
+            global_id.unwrap(),
+            |element_state: Option<PopoverElementState<M>>, cx| {
+                let element_state = element_state.unwrap_or_default();
+
+                let mut popover_layout_id = None;
+                let popover_element = element_state.popover.borrow_mut().as_mut().map(|popover| {
+                    let mut anchored = anchored().snap_to_window().anchor(self.anchor);
+                    if let Some(trigger_bounds) = element_state.trigger_bounds {
+                        anchored = anchored.position(
+                            self.resolved_attach().corner(trigger_bounds)
+                                + self.resolved_offset(cx),
+                        );
+                    }
+                    let mut element = deferred(anchored.child(popover.clone()))
+                        .with_priority(1)
+                        .into_any();
+
+                    popover_layout_id = Some(element.request_layout(cx));
+                    element
+                });
+
+                let mut trigger_element = self.trigger_builder.take().map(|builder| {
+                    builder(element_state.popover.clone(), self.content_builder.clone())
+                });
+
+                let trigger_layout_id = trigger_element
+                    .as_mut()
+                    .map(|trigger_element| trigger_element.request_layout(cx));
+
+                let layout_id = cx.request_layout(
+                    Style::default(),
+                    popover_layout_id.into_iter().chain(trigger_layout_id),
+                );
+
+                (
+                    (
+                        layout_id,
+                        PopoverFrameState {
+                            trigger_layout_id,
+                            trigger_element,
+                            popover_element,
+                        },
+                    ),
+                    element_state,
+                )
+            },
+        )
+    }
+
+    fn prepaint(
+        &mut self,
+        global_id: Option<&gpui::GlobalElementId>,
+        _: gpui::Bounds<gpui::Pixels>,
+        request_layout: &mut Self::RequestLayoutState,
+        cx: &mut WindowContext,
+    ) -> Self::PrepaintState {
+        if let Some(element) = &mut request_layout.trigger_element {
+            element.prepaint(cx);
+        }
+
+        if let Some(element) = &mut request_layout.popover_element {
+            element.prepaint(cx);
+        }
+
+        request_layout.trigger_layout_id.map(|layout_id| {
+            let bounds = cx.layout_bounds(layout_id);
+            cx.with_element_state(global_id.unwrap(), |element_state, _cx| {
+                let mut element_state: PopoverElementState<M> = element_state.unwrap();
+                element_state.trigger_bounds = Some(bounds);
+                ((), element_state)
+            });
+
+            cx.insert_hitbox(bounds, false).id
+        })
+    }
+
+    fn paint(
+        &mut self,
+        _: Option<&gpui::GlobalElementId>,
+        _: gpui::Bounds<gpui::Pixels>,
+        request_layout: &mut Self::RequestLayoutState,
+        trigger_hitbox: &mut Option<HitboxId>,
+        cx: &mut WindowContext,
+    ) {
+        if let Some(element) = &mut request_layout.trigger_element {
+            element.paint(cx);
+        }
+
+        if let Some(element) = &mut request_layout.popover_element {
+            element.paint(cx);
+
+            if let Some(hitbox) = *trigger_hitbox {
+                // Mouse-downing outside the menu dismisses it, so we don't
+                // want a click on the toggle to re-open it.
+                cx.on_mouse_event(move |_: &MouseDownEvent, phase, cx| {
+                    if phase == DispatchPhase::Bubble && hitbox.is_hovered(cx) {
+                        cx.stop_propagation()
+                    }
+                })
+            }
+        }
+    }
+}

crates/ui/src/prelude.rs

@@ -1,6 +1,7 @@
 //! The prelude of this crate. When building UI in Zed you almost always want to import this.
 
 pub use gpui::prelude::*;
+#[allow(unused_imports)]
 pub use gpui::{
     div, px, relative, rems, AbsoluteLength, DefiniteLength, Div, Element, ElementId,
     InteractiveElement, ParentElement, Pixels, Rems, RenderOnce, SharedString, Styled, ViewContext,

crates/ui/src/styled_ext.rs

@@ -1,10 +1,10 @@
-use crate::theme::{ActiveTheme, Colorize};
+use crate::theme::ActiveTheme;
 use gpui::{hsla, point, px, BoxShadow, Styled, WindowContext};
 use smallvec::{smallvec, SmallVec};
 
 pub enum ElevationIndex {
     Surface,
-    ElevatedSurface,
+    PopoverSurface,
     ModalSurface,
 }
 
@@ -13,7 +13,7 @@ impl ElevationIndex {
         match self {
             ElevationIndex::Surface => smallvec![],
 
-            ElevationIndex::ElevatedSurface => smallvec![BoxShadow {
+            ElevationIndex::PopoverSurface => smallvec![BoxShadow {
                 color: hsla(0., 0., 0., 0.12),
                 offset: point(px(0.), px(2.)),
                 blur_radius: px(3.),
@@ -22,26 +22,18 @@ impl ElevationIndex {
 
             ElevationIndex::ModalSurface => smallvec![
                 BoxShadow {
-                    color: hsla(0., 0., 0., 0.12),
-                    offset: point(px(0.), px(2.)),
-                    blur_radius: px(3.),
-                    spread_radius: px(0.),
-                },
-                BoxShadow {
-                    color: hsla(0., 0., 0., 0.08),
-                    offset: point(px(0.), px(3.)),
+                    color: hsla(0., 0., 0., 0.1),
+                    offset: point(px(0.), px(4.)),
                     blur_radius: px(6.),
-                    spread_radius: px(0.),
+                    spread_radius: px(-1.),
                 },
                 BoxShadow {
-                    color: hsla(0., 0., 0., 0.04),
-                    offset: point(px(0.), px(6.)),
-                    blur_radius: px(12.),
-                    spread_radius: px(0.),
-                },
+                    color: hsla(0., 0., 0., 0.1),
+                    offset: point(px(0.), px(2.)),
+                    blur_radius: px(4.),
+                    spread_radius: px(-2.),
+                }
             ],
-
-            _ => smallvec![],
         }
     }
 }
@@ -79,7 +71,7 @@ pub trait StyledExt: Styled + Sized {
 
     /// Appear above most UI elements
     fn elevation_2(self, cx: &mut WindowContext) -> Self {
-        elevated(self, cx, ElevationIndex::ElevatedSurface)
+        elevated(self, cx, ElevationIndex::PopoverSurface)
     }
 
     // Above all other UI elements and are located above the wash layer

crates/ui/src/tab/tab.rs

@@ -1,6 +1,5 @@
 use crate::selectable::Selectable;
 use crate::theme::{ActiveTheme, Colorize};
-use crate::Icon;
 use gpui::prelude::FluentBuilder as _;
 use gpui::{
     div, px, AnyElement, Div, IntoElement, ParentElement as _, RenderOnce, SharedString, Stateful,

crates/ui/src/theme.rs

@@ -182,7 +182,7 @@ impl Colors {
         Colors {
             title_bar_background: hsl(0., 0., 12.),
             background: hsl(0.0, 0.0, 6.0),
-            foreground: hsl(240., 5., 65.),
+            foreground: hsl(0., 0., 98.),
             card: hsl(299.0, 2., 9.),
             card_foreground: hsl(0.0, 0.0, 98.0),
             popover: hsl(240.0, 10.0, 3.9),

crates/ui/src/tooltip.rs

@@ -3,7 +3,7 @@ use gpui::{
     SharedString, Styled, ViewContext, VisualContext, WindowContext,
 };
 
-use crate::{h_flex, styled_ext::ElevationIndex, theme::ActiveTheme, v_flex};
+use crate::{h_flex, theme::ActiveTheme, v_flex, StyledExt};
 
 pub struct Tooltip {
     title: SharedString,
@@ -63,7 +63,7 @@ pub fn tooltip_container<V>(
             .rounded(px(8.))
             .border_1()
             .border_color(cx.theme().border)
-            .shadow(ElevationIndex::ElevatedSurface.shadow())
+            .elevation_2(cx)
             .text_color(cx.theme().popover_foreground)
             .py_1p5()
             .px_2()

crates/util/Cargo.toml

@@ -5,3 +5,6 @@ edition = "2021"
 
 [dependencies]
 log.workspace = true
+
+[lints]
+workspace = true

crates/workspace/Cargo.toml

@@ -9,3 +9,6 @@ ui.workspace = true
 ui-story.workspace = true
 anyhow.workspace = true
 util.workspace = true
+
+[lints]
+workspace = true

crates/workspace/src/app_state.rs

@@ -1,15 +1,15 @@
-use std::sync::{Arc, Weak};
+use std::sync::Weak;
 
 use gpui::{AppContext, Global};
 
 pub struct AppState {}
 
-struct GlobalAppState(Weak<AppState>);
+struct GlobalAppState();
 
 impl Global for GlobalAppState {}
 
 impl AppState {
-    pub fn set_global(app_state: Weak<AppState>, cx: &mut AppContext) {
-        cx.set_global(GlobalAppState(app_state));
+    pub fn set_global(_app_state: Weak<AppState>, cx: &mut AppContext) {
+        cx.set_global(GlobalAppState());
     }
 }

crates/workspace/src/lib.rs

@@ -173,7 +173,6 @@ impl Render for Workspace {
                                     .label_side(LabelSide::Left)
                                     .label("Dark Mode")
                                     .on_click(move |_, cx| {
-                                        dbg!("theme-mode clicked");
                                         let mode = match cx.theme().mode.is_dark() {
                                             false => ui::theme::ThemeMode::Dark,
                                             true => ui::theme::ThemeMode::Light,
@@ -185,6 +184,13 @@ impl Render for Workspace {
                     ),
             )
             .children(self.render_notifications(cx))
-            .child(div().flex().px_4().gap_2().child(self.stories.clone()))
+            .child(
+                div()
+                    .flex()
+                    .flex_1()
+                    .px_4()
+                    .gap_2()
+                    .child(self.stories.clone()),
+            )
     }
 }