T06: terminal view: frame, colors and styles, wide and combining cells, cursor and blink, font, padding, resize; bundled faces and icon font; shot example

src/app.rs

@@ -0,0 +1,89 @@
+use std::borrow::Cow;
+
+use anyhow::Context as _;
+use ely_gpui_component::{primitives::FocusScope, theme::ActiveTheme};
+use gpui::{
+    App, AppContext, Bounds, Context, Entity, FocusHandle, Focusable, IntoElement, ParentElement,
+    Render, Styled, TitlebarOptions, Window, WindowBounds, WindowHandle, WindowOptions, px, size,
+};
+
+use crate::{
+    settings::SettingsStore,
+    term::{ICONS, Launch, MONO, TerminalView, config, shell::ShellIntegration, spawn},
+    themes,
+};
+
+/// The main window's content.
+pub struct Workspace {
+    focus: FocusHandle,
+    terminal: Entity<TerminalView>,
+}
+
+impl Render for Workspace {
+    fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        FocusScope::new(&self.focus)
+            .root()
+            .size_full()
+            .bg(cx.theme().colors.bg)
+            .child(self.terminal.clone())
+    }
+}
+
+/// Fonts, settings, integration scripts and the chosen font, each checked before a window opens.
+pub fn start(cx: &mut App) -> anyhow::Result<()> {
+    cx.text_system()
+        .add_fonts(vec![
+            Cow::Borrowed(include_bytes!("../assets/fonts/JetBrainsMono-Bold.ttf")),
+            Cow::Borrowed(include_bytes!("../assets/fonts/JetBrainsMono-Italic.ttf")),
+            Cow::Borrowed(include_bytes!(
+                "../assets/fonts/JetBrainsMono-BoldItalic.ttf"
+            )),
+            Cow::Borrowed(include_bytes!(
+                "../assets/fonts/JetBrainsMonoNerdFontMono-Regular.ttf"
+            )),
+        ])
+        .context("app: the bundled fonts failed to register")?;
+    let names = cx.text_system().all_font_names();
+    for family in [MONO, ICONS] {
+        anyhow::ensure!(
+            names.iter().any(|name| name == family),
+            "app: {family} is not among the registered fonts"
+        );
+    }
+    SettingsStore::init(cx)?;
+    ShellIntegration::init(cx)?;
+    let family = &SettingsStore::get(cx).font_family;
+    anyhow::ensure!(
+        cx.text_system().all_font_names().contains(family),
+        "settings: font_family is {family:?}, which is not installed"
+    );
+    themes::apply(cx);
+    Ok(())
+}
+
+/// Opens the main window running `launch`.
+pub fn open(launch: Launch, cx: &mut App) -> anyhow::Result<WindowHandle<Workspace>> {
+    let bounds = Bounds::centered(None, size(px(1200.0), px(760.0)), cx);
+    let options = WindowOptions {
+        window_bounds: Some(WindowBounds::Windowed(bounds)),
+        titlebar: Some(TitlebarOptions {
+            title: Some("ELYTerminal".into()),
+            ..Default::default()
+        }),
+        ..Default::default()
+    };
+    let (pty, events) = spawn(&launch, (80, 24), (8, 16), config(SettingsStore::get(cx)))?;
+    let terminal = cx.new(|cx| TerminalView::new(pty, events, cx));
+    let window = cx.open_window(options, |window, cx| {
+        window
+            .observe_window_appearance(|_, cx| themes::apply(cx))
+            .detach();
+        window.focus(&terminal.focus_handle(cx), cx);
+        cx.new(|cx| Workspace {
+            focus: cx.focus_handle(),
+            terminal,
+        })
+    })?;
+    log::info!("app: main window open");
+    Ok(window)
+}