wip

crates/dock/src/tab/tab_bar.rs

@@ -0,0 +1,143 @@
+use gpui::prelude::FluentBuilder as _;
+#[cfg(not(target_os = "windows"))]
+use gpui::Pixels;
+use gpui::{
+    div, px, AnyElement, App, Div, InteractiveElement, IntoElement, ParentElement, RenderOnce,
+    ScrollHandle, StatefulInteractiveElement as _, StyleRefinement, Styled, Window,
+};
+use smallvec::SmallVec;
+use theme::ActiveTheme;
+use ui::{h_flex, Sizable, Size, StyledExt};
+
+use crate::platforms::linux::LinuxWindowControls;
+use crate::platforms::windows::WindowsWindowControls;
+
+#[derive(IntoElement)]
+pub struct TabBar {
+    base: Div,
+    style: StyleRefinement,
+    scroll_handle: Option<ScrollHandle>,
+    prefix: Option<AnyElement>,
+    suffix: Option<AnyElement>,
+    last_empty_space: AnyElement,
+    children: SmallVec<[AnyElement; 2]>,
+    size: Size,
+}
+
+impl TabBar {
+    pub fn new() -> Self {
+        Self {
+            base: div().px(px(-1.)),
+            style: StyleRefinement::default(),
+            scroll_handle: None,
+            children: SmallVec::new(),
+            prefix: None,
+            suffix: None,
+            size: Size::default(),
+            last_empty_space: div().w_3().into_any_element(),
+        }
+    }
+
+    /// Track the scroll of the TabBar.
+    pub fn track_scroll(mut self, scroll_handle: &ScrollHandle) -> Self {
+        self.scroll_handle = Some(scroll_handle.clone());
+        self
+    }
+
+    /// Set the prefix element of the TabBar
+    pub fn prefix(mut self, prefix: impl IntoElement) -> Self {
+        self.prefix = Some(prefix.into_any_element());
+        self
+    }
+
+    /// Set the suffix element of the TabBar
+    pub fn suffix(mut self, suffix: impl IntoElement) -> Self {
+        self.suffix = Some(suffix.into_any_element());
+        self
+    }
+
+    /// Set the last empty space element of the TabBar.
+    pub fn last_empty_space(mut self, last_empty_space: impl IntoElement) -> Self {
+        self.last_empty_space = last_empty_space.into_any_element();
+        self
+    }
+
+    #[cfg(not(target_os = "windows"))]
+    pub fn height(window: &mut Window) -> Pixels {
+        (1.75 * window.rem_size()).max(px(36.))
+    }
+}
+
+impl Default for TabBar {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl ParentElement for TabBar {
+    fn extend(&mut self, elements: impl IntoIterator<Item = AnyElement>) {
+        self.children.extend(elements)
+    }
+}
+
+impl Styled for TabBar {
+    fn style(&mut self) -> &mut StyleRefinement {
+        &mut self.style
+    }
+}
+
+impl Sizable for TabBar {
+    fn with_size(mut self, size: impl Into<Size>) -> Self {
+        self.size = size.into();
+        self
+    }
+}
+
+impl RenderOnce for TabBar {
+    fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement {
+        let focused = window.is_window_active();
+
+        self.base
+            .group("tab-bar")
+            .refine_style(&self.style)
+            .relative()
+            .flex()
+            .items_center()
+            .bg(cx.theme().elevated_surface_background)
+            .when(!focused, |this| {
+                this.bg(cx.theme().elevated_surface_background.opacity(0.75))
+            })
+            .border_b_1()
+            .border_color(cx.theme().border)
+            .overflow_hidden()
+            .text_color(cx.theme().text)
+            .when_some(self.prefix, |this, prefix| this.child(prefix))
+            .child(
+                h_flex()
+                    .id("tabs")
+                    .flex_grow()
+                    .gap_1()
+                    .overflow_x_scroll()
+                    .when_some(self.scroll_handle, |this, scroll_handle| {
+                        this.track_scroll(&scroll_handle)
+                    })
+                    .children(self.children)
+                    .when(self.suffix.is_some(), |this| {
+                        this.child(self.last_empty_space)
+                    }),
+            )
+            .when_some(self.suffix, |this, suffix| this.child(suffix))
+            .when(
+                !cx.theme().platform.is_mac() && !window.is_fullscreen(),
+                |this| match cx.theme().platform {
+                    theme::PlatformKind::Linux => {
+                        this.child(div().px_2().child(LinuxWindowControls::new()))
+                    }
+                    theme::PlatformKind::Windows => {
+                        this.child(WindowsWindowControls::new(Self::height(window)))
+                    }
+                    _ => this,
+                },
+            )
+    }
+}