Rename Shell → Application

Cargo.toml

@@ -22,14 +22,12 @@ rustdoc-args = ["--cfg", "doc_cfg"]
 [features]
 #########  meta / build features  #########
 
-# Include only "required" features.
-#
-#  A shell is required and wgpu is currently the only shell; this shell uses and
-#  requires theme support to function.
+# The minimal feature set needed to build basic applications (with assumptions
+# about target platforms).
 #
 # Note: only some examples build in this configuration; others need view,
 # markdown, resvg. Recommended also: clipboard, yaml (or some config format).
-minimal = ["wgpu", "winit", "wayland", "x11"]
+minimal = ["wgpu", "winit", "wayland"]
 # All recommended features for optimal experience
 default = ["minimal", "view", "image", "resvg", "clipboard", "markdown", "shaping", "spawn"]
 # All standard test target features
@@ -54,7 +52,7 @@ view = ["dep:kas-view"]
 #Enable WGPU backend:
 wgpu = ["dep:kas-wgpu"]
 
-# Enables documentation of APIs for shells and internal usage.
+# Enables documentation of APIs for graphics library and platform backends.
 # This API is not intended for use by end-user applications and
 # thus is omitted from built documentation by default.
 # This flag does not change the API, only built documentation.

ROADMAP.md

@@ -222,7 +222,7 @@ their input as a message key.
 ### Embedded video
 
 To investigate. Gstreamer integration should be viable when using a (new) OpenGL
-shell.
+backend.
 
 Integrating any video player as a child window should be possible (see Winit's
 `WindowBuilder::with_parent_window`, which is not yet supported everywhere).

crates/kas-core/Cargo.toml

@@ -25,7 +25,7 @@ stable = ["winit", "x11", "wayland", "markdown", "yaml", "json", "ron", "shaping
 # Use full specialization
 spec = []
 
-# Enables documentation of APIs for shells and internal usage.
+# Enables documentation of APIs for graphics library and platform backends.
 # This API is not intended for use by end-user applications and
 # thus is omitted from built documentation by default.
 # This flag does not change the API, only built documentation.

crates/kas-core/src/shell/shell.rs → crates/kas-core/src/app/app.rs

@@ -3,9 +3,9 @@
 // You may obtain a copy of the License in the LICENSE-APACHE file or at:
 //     https://www.apache.org/licenses/LICENSE-2.0
 
-//! [`Shell`] and supporting elements
+//! [`Application`] and supporting elements
 
-use super::{GraphicalShell, Platform, ProxyAction, Result, SharedState};
+use super::{AppGraphicsBuilder, AppState, Platform, ProxyAction, Result};
 use crate::config::Options;
 use crate::draw::{DrawShared, DrawSharedImpl};
 use crate::event;
@@ -16,29 +16,27 @@ use std::cell::RefCell;
 use std::rc::Rc;
 use winit::event_loop::{EventLoop, EventLoopBuilder, EventLoopProxy};
 
-/// The KAS shell
-///
-/// The "shell" is the layer over widgets, windows, events and graphics.
-pub struct Shell<Data: AppData, G: GraphicalShell, T: Theme<G::Shared>> {
+/// Application pre-launch state
+pub struct Application<Data: AppData, G: AppGraphicsBuilder, T: Theme<G::Shared>> {
     el: EventLoop<ProxyAction>,
     windows: Vec<Box<super::Window<Data, G::Surface, T>>>,
-    shared: SharedState<Data, G::Surface, T>,
+    state: AppState<Data, G::Surface, T>,
 }
 
 impl_scope! {
-    pub struct ShellBuilder<G: GraphicalShell, T: Theme<G::Shared>> {
+    pub struct AppBuilder<G: AppGraphicsBuilder, T: Theme<G::Shared>> {
         graphical: G,
         theme: T,
         options: Option<Options>,
         config: Option<Rc<RefCell<event::Config>>>,
     }
 
     impl Self {
-        /// Construct from a graphical shell and a theme
+        /// Construct from a graphics backend and a theme
         #[cfg_attr(not(feature = "internal_doc"), doc(hidden))]
         #[cfg_attr(doc_cfg, doc(cfg(internal_doc)))]
         pub fn new(graphical: G, theme: T) -> Self {
-            ShellBuilder {
+            AppBuilder {
                 graphical,
                 theme,
                 options: None,
@@ -75,7 +73,7 @@ impl_scope! {
         }
 
         /// Build with `data`
-        pub fn build<Data: AppData>(self, data: Data) -> Result<Shell<Data, G, T>> {
+        pub fn build<Data: AppData>(self, data: Data) -> Result<Application<Data, G, T>> {
             let mut theme = self.theme;
 
             let options = self.options.unwrap_or_else(Options::from_env);
@@ -84,7 +82,7 @@ impl_scope! {
             let config = self.config.unwrap_or_else(|| match options.read_config() {
                 Ok(config) => Rc::new(RefCell::new(config)),
                 Err(error) => {
-                    warn_about_error("Shell::new_custom: failed to read config", &error);
+                    warn_about_error("AppBuilder::build: failed to read config", &error);
                     Default::default()
                 }
             });
@@ -95,36 +93,36 @@ impl_scope! {
             draw_shared.set_raster_config(theme.config().raster());
 
             let pw = PlatformWrapper(&el);
-            let shared = SharedState::new(data, pw, draw_shared, theme, options, config)?;
+            let state = AppState::new(data, pw, draw_shared, theme, options, config)?;
 
-            Ok(Shell {
+            Ok(Application {
                 el,
                 windows: vec![],
-                shared,
+                state,
             })
         }
     }
 }
 
-/// Shell associated types
+/// Application associated types
 ///
-/// Note: these could be inherent associated types of [`Shell`] when Rust#8995 is stable.
-pub trait ShellAssoc {
+/// Note: these could be inherent associated types of [`Application`] when Rust#8995 is stable.
+pub trait AppAssoc {
     /// Shared draw state type
     type DrawShared: DrawSharedImpl;
 }
 
-impl<A: AppData, G: GraphicalShell, T> ShellAssoc for Shell<A, G, T>
+impl<A: AppData, G: AppGraphicsBuilder, T> AppAssoc for Application<A, G, T>
 where
     T: Theme<G::Shared> + 'static,
     T::Window: theme::Window,
 {
     type DrawShared = G::Shared;
 }
 
-impl<Data: AppData, G> Shell<Data, G, G::DefaultTheme>
+impl<Data: AppData, G> Application<Data, G, G::DefaultTheme>
 where
-    G: GraphicalShell + Default,
+    G: AppGraphicsBuilder + Default,
 {
     /// Construct a new instance with default options and theme
     ///
@@ -141,51 +139,51 @@ where
 
     /// Construct a builder with the default theme
     #[inline]
-    pub fn with_default_theme() -> ShellBuilder<G, G::DefaultTheme> {
-        ShellBuilder::new(G::default(), G::DefaultTheme::default())
+    pub fn with_default_theme() -> AppBuilder<G, G::DefaultTheme> {
+        AppBuilder::new(G::default(), G::DefaultTheme::default())
     }
 }
 
-impl<G, T> Shell<(), G, T>
+impl<G, T> Application<(), G, T>
 where
-    G: GraphicalShell + Default,
+    G: AppGraphicsBuilder + Default,
     T: Theme<G::Shared>,
 {
     /// Construct a builder with the given `theme`
     #[inline]
-    pub fn with_theme(theme: T) -> ShellBuilder<G, T> {
-        ShellBuilder::new(G::default(), theme)
+    pub fn with_theme(theme: T) -> AppBuilder<G, T> {
+        AppBuilder::new(G::default(), theme)
     }
 }
 
-impl<Data: AppData, G: GraphicalShell, T> Shell<Data, G, T>
+impl<Data: AppData, G: AppGraphicsBuilder, T> Application<Data, G, T>
 where
     T: Theme<G::Shared> + 'static,
     T::Window: theme::Window,
 {
     /// Access shared draw state
     #[inline]
     pub fn draw_shared(&mut self) -> &mut dyn DrawShared {
-        &mut self.shared.shell.draw
+        &mut self.state.shared.draw
     }
 
     /// Access the theme by ref
     #[inline]
     pub fn theme(&self) -> &T {
-        &self.shared.shell.theme
+        &self.state.shared.theme
     }
 
     /// Access the theme by ref mut
     #[inline]
     pub fn theme_mut(&mut self) -> &mut T {
-        &mut self.shared.shell.theme
+        &mut self.state.shared.theme
     }
 
     /// Assume ownership of and display a window
     #[inline]
     pub fn add(&mut self, window: Window<Data>) -> WindowId {
-        let id = self.shared.shell.next_window_id();
-        let win = Box::new(super::Window::new(&self.shared.shell, id, window));
+        let id = self.state.shared.next_window_id();
+        let win = Box::new(super::Window::new(&self.state.shared, id, window));
         self.windows.push(win);
         id
     }
@@ -205,7 +203,7 @@ where
     /// Run the main loop.
     #[inline]
     pub fn run(self) -> Result<()> {
-        let mut el = super::EventLoop::new(self.windows, self.shared);
+        let mut el = super::EventLoop::new(self.windows, self.state);
         self.el.run(move |event, elwt| el.handle(event, elwt))?;
         Ok(())
     }
@@ -303,14 +301,14 @@ impl<'a> PlatformWrapper<'a> {
     }
 }
 
-/// A proxy allowing control of a [`Shell`] from another thread.
+/// A proxy allowing control of an application from another thread.
 ///
-/// Created by [`Shell::create_proxy`].
+/// Created by [`Application::create_proxy`].
 pub struct Proxy(EventLoopProxy<ProxyAction>);
 
 /// Error type returned by [`Proxy`] functions.
 ///
-/// This error occurs only if the [`Shell`] already terminated.
+/// This error occurs only if the application already terminated.
 pub struct ClosedError;
 
 impl Proxy {

crates/kas-core/src/shell/common.rs → crates/kas-core/src/app/common.rs

@@ -3,7 +3,7 @@
 // You may obtain a copy of the License in the LICENSE-APACHE file or at:
 //     https://www.apache.org/licenses/LICENSE-2.0
 
-//! Public shell stuff common to all backends
+//! Public items common to all backends
 
 use crate::draw::DrawSharedImpl;
 use crate::draw::{color::Rgba, DrawIface, WindowCommon};
@@ -13,7 +13,7 @@ use raw_window_handle as raw;
 use std::time::Instant;
 use thiserror::Error;
 
-/// Possible failures from constructing a [`Shell`](super::Shell)
+/// Possible failures from constructing an [`Application`](super::Application)
 ///
 /// Some variants are undocumented. Users should not match these variants since
 /// they are not considered part of the public API.
@@ -168,12 +168,12 @@ impl Platform {
     }
 }
 
-/// API for the graphical implementation of a shell
+/// Builder for a graphics backend
 ///
-/// See also [`Shell`](super::Shell).
+/// See also [`Application`](super::Application).
 #[cfg_attr(not(feature = "internal_doc"), doc(hidden))]
 #[cfg_attr(doc_cfg, doc(cfg(internal_doc)))]
-pub trait GraphicalShell {
+pub trait AppGraphicsBuilder {
     /// The default theme
     type DefaultTheme: Default + Theme<Self::Shared>;