Added user notifications

crates/workspace/src/notifications.rs

@@ -0,0 +1,280 @@
+use std::{any::TypeId, ops::DerefMut};
+
+use collections::HashSet;
+use gpui::{AnyViewHandle, Entity, MutableAppContext, View, ViewContext, ViewHandle};
+
+use crate::Workspace;
+
+pub fn init(cx: &mut MutableAppContext) {
+    cx.set_global(NotificationTracker::new());
+    simple_message_notification::init(cx);
+}
+
+pub trait Notification: View {
+    fn should_dismiss_notification_on_event(&self, event: &<Self as Entity>::Event) -> bool;
+}
+
+pub trait NotificationHandle {
+    fn id(&self) -> usize;
+    fn to_any(&self) -> AnyViewHandle;
+}
+
+impl<T: Notification> NotificationHandle for ViewHandle<T> {
+    fn id(&self) -> usize {
+        self.id()
+    }
+
+    fn to_any(&self) -> AnyViewHandle {
+        self.into()
+    }
+}
+
+impl From<&dyn NotificationHandle> for AnyViewHandle {
+    fn from(val: &dyn NotificationHandle) -> Self {
+        val.to_any()
+    }
+}
+
+struct NotificationTracker {
+    notifications_sent: HashSet<TypeId>,
+}
+
+impl std::ops::Deref for NotificationTracker {
+    type Target = HashSet<TypeId>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.notifications_sent
+    }
+}
+
+impl DerefMut for NotificationTracker {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.notifications_sent
+    }
+}
+
+impl NotificationTracker {
+    fn new() -> Self {
+        Self {
+            notifications_sent: HashSet::default(),
+        }
+    }
+}
+
+impl Workspace {
+    pub fn show_notification_once<V: Notification>(
+        &mut self,
+        id: usize,
+        cx: &mut ViewContext<Self>,
+        build_notification: impl FnOnce(&mut ViewContext<Self>) -> ViewHandle<V>,
+    ) {
+        if !cx
+            .global::<NotificationTracker>()
+            .contains(&TypeId::of::<V>())
+        {
+            cx.update_global::<NotificationTracker, _, _>(|tracker, _| {
+                tracker.insert(TypeId::of::<V>())
+            });
+
+            self.show_notification::<V>(id, cx, build_notification)
+        }
+    }
+
+    pub fn show_notification<V: Notification>(
+        &mut self,
+        id: usize,
+        cx: &mut ViewContext<Self>,
+        build_notification: impl FnOnce(&mut ViewContext<Self>) -> ViewHandle<V>,
+    ) {
+        let type_id = TypeId::of::<V>();
+        if self
+            .notifications
+            .iter()
+            .all(|(existing_type_id, existing_id, _)| {
+                (*existing_type_id, *existing_id) != (type_id, id)
+            })
+        {
+            let notification = build_notification(cx);
+            cx.subscribe(&notification, move |this, handle, event, cx| {
+                if handle.read(cx).should_dismiss_notification_on_event(event) {
+                    this.dismiss_notification(type_id, id, cx);
+                }
+            })
+            .detach();
+            self.notifications
+                .push((type_id, id, Box::new(notification)));
+            cx.notify();
+        }
+    }
+
+    fn dismiss_notification(&mut self, type_id: TypeId, id: usize, cx: &mut ViewContext<Self>) {
+        self.notifications
+            .retain(|(existing_type_id, existing_id, _)| {
+                if (*existing_type_id, *existing_id) == (type_id, id) {
+                    cx.notify();
+                    false
+                } else {
+                    true
+                }
+            });
+    }
+}
+
+pub mod simple_message_notification {
+    use std::process::Command;
+
+    use gpui::{
+        actions,
+        elements::{Flex, MouseEventHandler, Padding, ParentElement, Svg, Text},
+        impl_actions, Action, CursorStyle, Element, Entity, MouseButton, MutableAppContext, View,
+        ViewContext,
+    };
+    use menu::Cancel;
+    use serde::Deserialize;
+    use settings::Settings;
+
+    use crate::Workspace;
+
+    use super::Notification;
+
+    actions!(message_notifications, [CancelMessageNotification]);
+
+    #[derive(Clone, Default, Deserialize, PartialEq)]
+    pub struct OsOpen(pub String);
+
+    impl_actions!(message_notifications, [OsOpen]);
+
+    pub fn init(cx: &mut MutableAppContext) {
+        cx.add_action(MessageNotification::dismiss);
+        cx.add_action(
+            |_workspace: &mut Workspace, open_action: &OsOpen, _cx: &mut ViewContext<Workspace>| {
+                #[cfg(target_os = "macos")]
+                {
+                    let mut command = Command::new("open");
+                    command.arg(open_action.0.clone());
+
+                    command.spawn().ok();
+                }
+            },
+        )
+    }
+
+    pub struct MessageNotification {
+        message: String,
+        click_action: Box<dyn Action>,
+        click_message: String,
+    }
+
+    pub enum MessageNotificationEvent {
+        Dismiss,
+    }
+
+    impl Entity for MessageNotification {
+        type Event = MessageNotificationEvent;
+    }
+
+    impl MessageNotification {
+        pub fn new<S1: AsRef<str>, A: Action, S2: AsRef<str>>(
+            message: S1,
+            click_action: A,
+            click_message: S2,
+        ) -> Self {
+            Self {
+                message: message.as_ref().to_string(),
+                click_action: Box::new(click_action) as Box<dyn Action>,
+                click_message: click_message.as_ref().to_string(),
+            }
+        }
+
+        pub fn dismiss(&mut self, _: &CancelMessageNotification, cx: &mut ViewContext<Self>) {
+            cx.emit(MessageNotificationEvent::Dismiss);
+        }
+    }
+
+    impl View for MessageNotification {
+        fn ui_name() -> &'static str {
+            "MessageNotification"
+        }
+
+        fn render(&mut self, cx: &mut gpui::RenderContext<'_, Self>) -> gpui::ElementBox {
+            let theme = cx.global::<Settings>().theme.clone();
+            let theme = &theme.update_notification;
+
+            enum MessageNotificationTag {}
+
+            let click_action = self.click_action.boxed_clone();
+            let click_message = self.click_message.clone();
+            let message = self.message.clone();
+
+            MouseEventHandler::<MessageNotificationTag>::new(0, cx, |state, cx| {
+                Flex::column()
+                    .with_child(
+                        Flex::row()
+                            .with_child(
+                                Text::new(message, theme.message.text.clone())
+                                    .contained()
+                                    .with_style(theme.message.container)
+                                    .aligned()
+                                    .top()
+                                    .left()
+                                    .flex(1., true)
+                                    .boxed(),
+                            )
+                            .with_child(
+                                MouseEventHandler::<Cancel>::new(0, cx, |state, _| {
+                                    let style = theme.dismiss_button.style_for(state, false);
+                                    Svg::new("icons/x_mark_8.svg")
+                                        .with_color(style.color)
+                                        .constrained()
+                                        .with_width(style.icon_width)
+                                        .aligned()
+                                        .contained()
+                                        .with_style(style.container)
+                                        .constrained()
+                                        .with_width(style.button_width)
+                                        .with_height(style.button_width)
+                                        .boxed()
+                                })
+                                .with_padding(Padding::uniform(5.))
+                                .on_click(MouseButton::Left, move |_, cx| {
+                                    cx.dispatch_action(CancelMessageNotification)
+                                })
+                                .aligned()
+                                .constrained()
+                                .with_height(
+                                    cx.font_cache().line_height(theme.message.text.font_size),
+                                )
+                                .aligned()
+                                .top()
+                                .flex_float()
+                                .boxed(),
+                            )
+                            .boxed(),
+                    )
+                    .with_child({
+                        let style = theme.action_message.style_for(state, false);
+
+                        Text::new(click_message, style.text.clone())
+                            .contained()
+                            .with_style(style.container)
+                            .boxed()
+                    })
+                    .contained()
+                    .boxed()
+            })
+            .with_cursor_style(CursorStyle::PointingHand)
+            .on_click(MouseButton::Left, move |_, cx| {
+                cx.dispatch_any_action(click_action.boxed_clone())
+            })
+            .boxed()
+        }
+    }
+
+    impl Notification for MessageNotification {
+        fn should_dismiss_notification_on_event(&self, event: &<Self as Entity>::Event) -> bool {
+            match event {
+                MessageNotificationEvent::Dismiss => true,
+            }
+        }
+    }
+}