Component Group View with static header and without icons (#3373)

Add an initial version of the visual component for displaying the Component Group View. The component contains a header (for displaying the Group Name) and a list of labels (for displaying the component names).

https://www.pivotaltracker.com/story/show/181724889


#### Visuals

A screenshot from a debug scene demonstrating the component:

<img width="251" alt="Screenshot 2022-04-13 at 20 07 56" src="https://user-images.githubusercontent.com/273837/163243304-21c3ad78-4813-4368-b3bb-844d979da699.png">



Screenshots from other debug scenes (`list_view` and `text_area`), demonstrating that the other components still display correctly:

<img width="202" alt="Screenshot 2022-04-13 at 20 08 56" src="https://user-images.githubusercontent.com/273837/163243428-de9dc1c7-5a9f-45e0-9325-db60cece9768.png">


<img width="403" alt="Screenshot 2022-04-13 at 20 08 48" src="https://user-images.githubusercontent.com/273837/163243432-895061d9-5bd9-4349-8679-eb63b0f6724d.png">


A screenshot of the Node Searcher's list, showing that long entries in a ListView are now truncated, and an ellipsis character is added in place of removed characters:


<img width="651" alt="Screenshot 2022-04-13 at 20 10 16" src="https://user-images.githubusercontent.com/273837/163243664-5b671969-7aa0-4bef-8fd2-825602d85848.png">

# Important Notes
- Adding support for the text truncation feature in `ListView` required some changes in the`list_view::Entry`-related APIs.
- An embedded font was added (DejaVuSans-Bold) for use in the Component Group View debug scene, and 5 unused embedded fonts were removed.

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 #### Visual Environment
 
+- [Long names on the Node Searcher's list are truncated.][3373] The part of the
+  name that doesn't fit in the Searcher's window is replaced with an ellipsis
+  character ("…").
 - [Magnet Alignment algorithm is used while placing new nodes][3366]. When we
   find an available free space for a new node, the node gets aligned with the
   surrounding nodes horizontally and vertically. This helps to preserve a nice
@@ -154,6 +157,7 @@
 [3349]: https://github.com/enso-org/enso/pull/3349
 [3361]: https://github.com/enso-org/enso/pull/3361
 [3364]: https://github.com/enso-org/enso/pull/3364
+[3373]: https://github.com/enso-org/enso/pull/3373
 [3377]: https://github.com/enso-org/enso/pull/3377
 [3366]: https://github.com/enso-org/enso/pull/3366
 [3379]: https://github.com/enso-org/enso/pull/3379

Cargo.lock

@@ -739,6 +739,19 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "debug-scene-component-group"
+version = "0.1.0"
+dependencies = [
+ "enso-frp",
+ "ensogl-core",
+ "ensogl-hardcoded-theme",
+ "ensogl-list-view",
+ "ensogl-text-msdf-sys",
+ "ide-view-component-group",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "debug-scene-interface"
 version = "0.1.0"
@@ -941,6 +954,7 @@ dependencies = [
 name = "enso-debug-scene"
 version = "0.1.0"
 dependencies = [
+ "debug-scene-component-group",
  "debug-scene-interface",
  "debug-scene-visualization",
 ]
@@ -1706,7 +1720,6 @@ dependencies = [
  "enso-text",
  "enso-types",
  "ensogl-core",
- "ensogl-hardcoded-theme",
  "ensogl-text-embedded-fonts",
  "ensogl-text-msdf-sys",
  "wasm-bindgen-test",
@@ -2257,6 +2270,18 @@ dependencies = [
  "welcome-screen",
 ]
 
+[[package]]
+name = "ide-view-component-group"
+version = "0.1.0"
+dependencies = [
+ "enso-frp",
+ "ensogl-core",
+ "ensogl-gui-component",
+ "ensogl-hardcoded-theme",
+ "ensogl-list-view",
+ "ensogl-text",
+]
+
 [[package]]
 name = "ide-view-graph-editor"
 version = "0.1.0"

app/gui/view/component-browser/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "ide-view-component-browser"
+version = "0.1.0"
+authors = ["Enso Team <contact@enso.org>"]
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+ide-view-component-group = { path = "component-group" }

app/gui/view/component-browser/component-group/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "ide-view-component-group"
+version = "0.1.0"
+authors = ["Enso Team <contact@enso.org>"]
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+enso-frp = { version = "0.1.0", path = "../../../../../lib/rust/frp" }
+ensogl-core = { version = "0.1.0", path = "../../../../../lib/rust/ensogl/core" }
+ensogl-gui-component = { version = "0.1.0", path = "../../../../../lib/rust/ensogl/component/gui" }
+ensogl-hardcoded-theme = { version = "0.1.0", path = "../../../../../lib/rust/ensogl/app/theme/hardcoded" }
+ensogl-list-view = { version = "0.1.0", path = "../../../../../lib/rust/ensogl/component/list-view" }
+ensogl-text = { version = "0.1.0", path = "../../../../../lib/rust/ensogl/component/text" }
+

app/gui/view/component-browser/component-group/src/lib.rs

@@ -0,0 +1,250 @@
+//! This module defines a widget for displaying a list of entries of a component group and the name
+//! of the component group.
+//!
+//! The widget is defined by the [`View`].
+//!
+//! To learn more about component groups, see the [Component Browser Design
+//! Document](https://github.com/enso-org/design/blob/e6cffec2dd6d16688164f04a4ef0d9dff998c3e7/epics/component-browser/design.md).
+
+// === Standard Linter Configuration ===
+#![deny(non_ascii_idents)]
+#![warn(unsafe_code)]
+// === Non-Standard Linter Configuration ===
+#![warn(missing_copy_implementations)]
+#![warn(missing_debug_implementations)]
+#![warn(missing_docs)]
+#![warn(trivial_casts)]
+#![warn(trivial_numeric_casts)]
+#![warn(unused_import_braces)]
+#![warn(unused_qualifications)]
+
+use ensogl_core::prelude::*;
+
+use enso_frp as frp;
+use ensogl_core::application::Application;
+use ensogl_core::data::color::Rgba;
+use ensogl_core::display;
+use ensogl_core::display::shape::*;
+use ensogl_gui_component::component;
+use ensogl_hardcoded_theme::application::component_browser::component_group as theme;
+use ensogl_list_view as list_view;
+use ensogl_text as text;
+
+
+
+// =================
+// === Constants ===
+// =================
+
+const HEADER_FONT: &str = "DejaVuSans-Bold";
+
+
+
+// ==========================
+// === Shapes Definitions ===
+// ==========================
+
+
+// === Background ===
+
+/// The background of the [`View`].
+pub mod background {
+    use super::*;
+
+    ensogl_core::define_shape_system! {
+        below = [list_view::background];
+        (style:Style, color:Vector4) {
+            let sprite_width: Var<Pixels> = "input_size.x".into();
+            let sprite_height: Var<Pixels> = "input_size.y".into();
+            let color = Var::<Rgba>::from(color);
+            // TODO[MC,WD]: We should use Plane here, but it has a bug - renders wrong color. See:
+            //   https://github.com/enso-org/enso/pull/3373#discussion_r849054476
+            let shape = Rect((&sprite_width, &sprite_height)).fill(color);
+            shape.into()
+        }
+    }
+}
+
+
+
+// =======================
+// === Header Geometry ===
+// =======================
+
+#[derive(Debug, Copy, Clone, Default)]
+struct HeaderGeometry {
+    height:         f32,
+    padding_left:   f32,
+    padding_right:  f32,
+    padding_bottom: f32,
+}
+
+impl HeaderGeometry {
+    fn from_style(style: &StyleWatchFrp, network: &frp::Network) -> frp::Sampler<Self> {
+        let height = style.get_number(theme::header::height);
+        let padding_left = style.get_number(theme::header::padding::left);
+        let padding_right = style.get_number(theme::header::padding::right);
+        let padding_bottom = style.get_number(theme::header::padding::bottom);
+
+        frp::extend! { network
+            init <- source_();
+            theme <- all_with5(&init,&height,&padding_left,&padding_right,&padding_bottom,
+                |_,&height,&padding_left,&padding_right,&padding_bottom|
+                    Self{height,padding_left,padding_right,padding_bottom}
+            );
+            theme_sampler <- theme.sampler();
+        }
+        init.emit(());
+        theme_sampler
+    }
+}
+
+
+
+// ===========
+// === FRP ===
+// ===========
+
+ensogl_core::define_endpoints_2! {
+    Input {
+        set_header(String),
+        set_entries(list_view::entry::AnyModelProvider<list_view::entry::Label>),
+        set_background_color(Rgba),
+        set_size(Vector2),
+    }
+    Output {}
+}
+
+impl component::Frp<Model> for Frp {
+    fn init(api: &Self::Private, _app: &Application, model: &Model, style: &StyleWatchFrp) {
+        let network = &api.network;
+        let input = &api.input;
+        let header_text_size = style.get_number(theme::header::text::size);
+        frp::extend! { network
+
+            // === Geometry ===
+
+            let header_geometry = HeaderGeometry::from_style(style, network);
+            size_and_header_geometry <- all(&input.set_size, &header_geometry);
+            eval size_and_header_geometry(((size, hdr_geom)) model.resize(*size, *hdr_geom));
+
+
+            // === Header ===
+
+            init <- source_();
+            header_text_size <- all(&header_text_size, &init)._0();
+            model.header.set_default_text_size <+ header_text_size.map(|v| text::Size(*v));
+            _set_header <- input.set_header.map2(&size_and_header_geometry, f!(
+                (text, (size, hdr_geom)) {
+                    model.header_text.replace(text.clone());
+                    model.update_header_width(*size, *hdr_geom);
+                })
+            );
+            eval input.set_background_color((c)
+                model.background.color.set(c.into()));
+
+
+            // === Entries ===
+
+            model.entries.set_background_color(HOVER_COLOR);
+            model.entries.show_background_shadow(false);
+            model.entries.set_background_corners_radius(0.0);
+            model.entries.set_background_color <+ input.set_background_color;
+            model.entries.set_entries <+ input.set_entries;
+        }
+        init.emit(());
+    }
+}
+
+
+
+// =============
+// === Model ===
+// =============
+
+/// The Model of the [`View`] component.
+#[derive(Clone, CloneRef, Debug)]
+pub struct Model {
+    display_object: display::object::Instance,
+    header:         text::Area,
+    header_text:    Rc<RefCell<String>>,
+    background:     background::View,
+    entries:        list_view::ListView<list_view::entry::Label>,
+}
+
+impl display::Object for Model {
+    fn display_object(&self) -> &display::object::Instance {
+        &self.display_object
+    }
+}
+
+impl component::Model for Model {
+    fn label() -> &'static str {
+        "ComponentGroup"
+    }
+
+    fn new(app: &Application, logger: &Logger) -> Self {
+        let header_text = default();
+        let display_object = display::object::Instance::new(&logger);
+        let background = background::View::new(&logger);
+        let header = text::Area::new(app);
+        let entries = list_view::ListView::new(app);
+        display_object.add_child(&background);
+        display_object.add_child(&header);
+        display_object.add_child(&entries);
+
+        header.set_font(HEADER_FONT);
+        let label_layer = &app.display.default_scene.layers.label;
+        header.add_to_scene_layer(label_layer);
+
+        Model { display_object, header, header_text, background, entries }
+    }
+}
+
+impl Model {
+    fn resize(&self, size: Vector2, header_geometry: HeaderGeometry) {
+        // === Background ===
+
+        self.background.size.set(size);
+
+
+        // === Header Text ===
+
+        let header_padding_left = header_geometry.padding_left;
+        let header_text_x = -size.x / 2.0 + header_padding_left;
+        let header_text_height = self.header.height.value();
+        let header_padding_bottom = header_geometry.padding_bottom;
+        let header_height = header_geometry.height;
+        let header_bottom_y = size.y / 2.0 - header_height;
+        let header_text_y = header_bottom_y + header_text_height + header_padding_bottom;
+        self.header.set_position_xy(Vector2(header_text_x, header_text_y));
+        self.update_header_width(size, header_geometry);
+
+
+        // === Entries ===
+
+        self.entries.resize(size - Vector2(0.0, header_height));
+        self.entries.set_position_y(-header_height / 2.0);
+    }
+
+    fn update_header_width(&self, size: Vector2, header_geometry: HeaderGeometry) {
+        let header_padding_left = header_geometry.padding_left;
+        let header_padding_right = header_geometry.padding_right;
+        let max_text_width = size.x - header_padding_left - header_padding_right;
+        self.header.set_content_truncated(self.header_text.borrow().clone(), max_text_width);
+    }
+}
+
+
+
+// ============
+// === View ===
+// ============
+
+/// A widget for displaying the entries and name of a component group.
+///
+/// The widget is rendered as a header label, a list of entries below it, and a colored background.
+///
+/// To learn more about component groups, see the [Component Browser Design
+/// Document](https://github.com/enso-org/design/blob/e6cffec2dd6d16688164f04a4ef0d9dff998c3e7/epics/component-browser/design.md).
+pub type View = component::ComponentView<Model, Frp>;

app/gui/view/component-browser/src/lib.rs

@@ -0,0 +1,19 @@
+// === Standard Linter Configuration ===
+#![deny(non_ascii_idents)]
+#![warn(unsafe_code)]
+// === Non-Standard Linter Configuration ===
+#![warn(missing_copy_implementations)]
+#![warn(missing_debug_implementations)]
+#![warn(missing_docs)]
+#![warn(trivial_casts)]
+#![warn(trivial_numeric_casts)]
+#![warn(unused_import_braces)]
+#![warn(unused_qualifications)]
+
+
+// ==============
+// === Export ===
+// ==============
+
+pub use ide_view_component_group as component_group;
+

app/gui/view/debug_scene/Cargo.toml

@@ -8,5 +8,6 @@ edition = "2021"
 crate-type = ["cdylib", "rlib"]
 
 [dependencies]
+debug-scene-component-group = { path = "component-group" }
 debug-scene-interface = { path = "interface" }
 debug-scene-visualization = { path = "visualization" }

app/gui/view/debug_scene/component-group/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "debug-scene-component-group"
+version = "0.1.0"
+authors = ["Enso Team <contact@enso.org>"]
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+enso-frp = { path = "../../../../../lib/rust/frp" }
+ensogl-core = { path = "../../../../../lib/rust/ensogl/core" }
+ensogl-hardcoded-theme = { path = "../../../../../lib/rust/ensogl/app/theme/hardcoded" }
+ensogl-list-view = { path = "../../../../../lib/rust/ensogl/component/list-view" }
+ensogl-text-msdf-sys = { path = "../../../../../lib/rust/ensogl/component/text/msdf-sys" }
+ide-view-component-group = { path = "../../component-browser/component-group" }
+wasm-bindgen = { version = "0.2.78", features = ["nightly"] }

app/gui/view/debug_scene/component-group/src/lib.rs

@@ -0,0 +1,106 @@
+//! A debug scene which shows the Component Group visual component.
+
+// === Standard Linter Configuration ===
+#![deny(non_ascii_idents)]
+#![warn(unsafe_code)]
+// === Non-Standard Linter Configuration ===
+#![warn(missing_copy_implementations)]
+#![warn(missing_debug_implementations)]
+#![warn(missing_docs)]
+#![warn(trivial_casts)]
+#![warn(trivial_numeric_casts)]
+#![warn(unused_import_braces)]
+#![warn(unused_qualifications)]
+
+use ensogl_core::prelude::*;
+use wasm_bindgen::prelude::*;
+
+use ensogl_core::application::Application;
+use ensogl_core::data::color;
+use ensogl_core::display::object::ObjectOps;
+use ensogl_hardcoded_theme as theme;
+use ensogl_list_view as list_view;
+use ensogl_text_msdf_sys::run_once_initialized;
+use ide_view_component_group as component_group;
+
+
+
+// ===================
+// === Entry Point ===
+// ===================
+
+/// An entry point.
+#[entry_point]
+pub fn main() {
+    run_once_initialized(|| {
+        let app = Application::new("root");
+        init(&app);
+        mem::forget(app);
+    });
+}
+
+
+
+// ====================
+// === Mock Entries ===
+// ====================
+
+#[derive(Clone, Debug)]
+struct MockEntries {
+    entries: Vec<String>,
+}
+
+impl MockEntries {
+    fn new(entries: Vec<String>) -> Self {
+        Self { entries }
+    }
+
+    fn get_entry(&self, i: usize) -> Option<String> {
+        self.entries.get(i).cloned()
+    }
+}
+
+impl list_view::entry::ModelProvider<list_view::entry::Label> for MockEntries {
+    fn entry_count(&self) -> usize {
+        self.entries.len()
+    }
+
+    fn get(&self, id: usize) -> Option<String> {
+        self.get_entry(id)
+    }
+}
+
+
+
+// ========================
+// === Init Application ===
+// ========================
+
+fn init(app: &Application) {
+    theme::builtin::dark::register(&app);
+    theme::builtin::light::register(&app);
+    theme::builtin::light::enable(&app);
+
+    let mock_entries = MockEntries::new(vec![
+        "long sample entry with text overflowing the width".into(),
+        "convert".into(),
+        "table input".into(),
+        "text input".into(),
+        "number input".into(),
+        "table input".into(),
+        "data output".into(),
+        "data input".into(),
+    ]);
+
+
+    let component_group = app.new_view::<component_group::View>();
+    let provider = list_view::entry::AnyModelProvider::new(mock_entries);
+    let group_name = "Long group name with text overflowing the width";
+    component_group.set_header(group_name.to_string());
+    component_group.set_entries(provider);
+    component_group.set_size(Vector2(150.0, 200.0));
+    component_group.set_background_color(color::Rgba(0.927, 0.937, 0.913, 1.0));
+    app.display.add_child(&component_group);
+
+    std::mem::forget(component_group);
+}

app/gui/view/debug_scene/interface/src/lib.rs

@@ -45,9 +45,9 @@ use uuid::Uuid;
 const STUB_MODULE: &str = "from Base import all\n\nmain = IO.println \"Hello\"\n";
 
 
-#[wasm_bindgen]
+#[entry_point]
 #[allow(dead_code)]
-pub fn entry_point_interface() {
+pub fn main() {
     run_once_initialized(|| {
         let app = Application::new("root");
         init(&app);

app/gui/view/debug_scene/src/lib.rs

@@ -20,5 +20,6 @@
 // === Export ===
 // ==============
 
+pub use debug_scene_component_group as component_group;
 pub use debug_scene_interface as interface;
 pub use debug_scene_visualization as visualization;

app/gui/view/debug_scene/visualization/src/lib.rs

@@ -92,9 +92,9 @@ fn constructor_graph() -> visualization::java_script::Definition {
     visualization::java_script::Definition::new_builtin(sources).unwrap()
 }
 
-#[wasm_bindgen]
+#[entry_point]
 #[allow(dead_code, missing_docs)]
-pub fn entry_point_visualization() {
+pub fn main() {
     run_once_initialized(|| {
         let app = Application::new("root");
         init(&app);

build/run.js

@@ -198,7 +198,7 @@ commands.build.rust = async function (argv) {
         console.log('Minimizing the WASM binary.')
         await gzip(paths.wasm.main, paths.wasm.mainGz)
 
-        const limitMb = 4.67
+        const limitMb = 4.05
         await checkWasmSize(paths.wasm.mainGz, limitMb)
     }
     // Copy WASM files from temporary directory to Webpack's `dist` directory.

lib/rust/ensogl/app/theme/hardcoded/src/lib.rs

@@ -179,6 +179,21 @@ define_themes! { [light:0, dark:1]
             hide_delay_duration_ms = 150.0, 150.0;
             show_delay_duration_ms = 150.0, 150.0;
         }
+        component_browser {
+            component_group {
+                header {
+                    text {
+                        size = 12.0, 12.0;
+                    }
+                    height = 30.0, 30.0;
+                    padding {
+                        left   = 16.5, 16.5;
+                        right  = 2.5, 2.5;
+                        bottom = 5.0, 5.0;
+                    }
+                }
+            }
+        }
         searcher {
             action_list_gap = 10.0, 10.0;
             padding         = 5.0, 5.0;

lib/rust/ensogl/component/list-view/src/entry.rs

@@ -66,6 +66,9 @@ pub trait Entry: CloneRef + Debug + display::Object + 'static {
     /// Update content with new model.
     fn update(&self, model: &Self::Model);
 
+    /// Resize the entry's view to fit a new width.
+    fn set_max_width(&self, max_width_px: f32);
+
     /// Set the layer of all [`text::Area`] components inside. The [`text::Area`] component is
     /// handled in a special way, and is often in different layer than shapes. See TODO comment
     /// in [`text::Area::add_to_scene_layer`] method.
@@ -84,10 +87,19 @@ pub trait Entry: CloneRef + Debug + display::Object + 'static {
 pub struct Label {
     display_object: display::object::Instance,
     label:          text::Area,
+    text:           Rc<RefCell<String>>,
+    max_width_px:   Rc<Cell<f32>>,
     network:        enso_frp::Network,
     style_watch:    StyleWatchFrp,
 }
 
+impl Label {
+    fn update_label_content(&self) {
+        let text = self.text.borrow().clone();
+        self.label.set_content_truncated(text, self.max_width_px.get());
+    }
+}
+
 impl Entry for Label {
     type Model = String;
 
@@ -95,6 +107,8 @@ impl Entry for Label {
         let logger = Logger::new("list_view::entry::Label");
         let display_object = display::object::Instance::new(logger);
         let label = app.new_view::<ensogl_text::Area>();
+        let text = default();
+        let max_width_px = default();
         let network = frp::Network::new("list_view::entry::Label");
         let style_watch = StyleWatchFrp::new(&app.display.default_scene.style_sheet);
         let color = style_watch.get_color(theme::widget::list_view::text);
@@ -111,11 +125,19 @@ impl Entry for Label {
             eval size ((size) label.set_position_y(size/2.0));
         }
         init.emit(());
-        Self { display_object, label, network, style_watch }
+        Self { display_object, label, text, max_width_px, network, style_watch }
     }
 
     fn update(&self, model: &Self::Model) {
-        self.label.set_content(model);
+        self.text.replace(model.clone());
+        self.update_label_content();
+    }
+
+    fn set_max_width(&self, max_width_px: f32) {
+        if self.max_width_px.get() != max_width_px {
+            self.max_width_px.set(max_width_px);
+            self.update_label_content();
+        }
     }
 
     fn set_label_layer(&self, label_layer: &display::scene::Layer) {
@@ -176,6 +198,10 @@ impl Entry for GlyphHighlightedLabel {
         self.highlight.emit(&model.highlighted);
     }
 
+    fn set_max_width(&self, max_width_px: f32) {
+        self.inner.set_max_width(max_width_px);
+    }
+
     fn set_label_layer(&self, layer: &display::scene::Layer) {
         self.inner.set_label_layer(layer);
     }

lib/rust/ensogl/component/list-view/src/entry/list.rs

@@ -127,8 +127,9 @@ where E::Model: Default
         }
     }
 
-    /// Update displayed entries to show the given range.
+    /// Update displayed entries to show the given range and limit their display width to at most
-    pub fn update_entries(&self, mut range: Range<entry::Id>) {
+    /// `max_width_px`.
+    pub fn update_entries(&self, mut range: Range<entry::Id>, max_width_px: f32) {
         range.end = range.end.min(self.provider.get().entry_count());
         if range != self.entries_range.get() {
             debug!(self.logger, "Update entries for {range:?}");
@@ -152,13 +153,18 @@ where E::Model: Default
             });
             self.entries_range.set(range);
         }
+        for entry in self.entries.borrow().iter() {
+            entry.entry.set_max_width(max_width_px);
+        }
     }
 
-    /// Update displayed entries, giving new provider.
+    /// Update displayed entries, giving new provider. New entries created by the function have
+    /// their maximum width set to `max_width_px`.
     pub fn update_entries_new_provider(
         &self,
         provider: impl Into<entry::AnyModelProvider<E>> + 'static,
         mut range: Range<entry::Id>,
+        max_width_px: f32,
     ) {
         const MAX_SAFE_ENTRIES_COUNT: usize = 1000;
         let provider = provider.into();
@@ -173,7 +179,12 @@ where E::Model: Default
         range.end = range.end.min(provider.entry_count());
         let models = range.clone().map(|id| (id, provider.get(id)));
         let mut entries = self.entries.borrow_mut();
-        entries.resize_with(range.len(), || self.create_new_entry());
+        let create_new_entry_with_max_width = || {
+            let entry = self.create_new_entry();
+            entry.entry.set_max_width(max_width_px);
+            entry
+        };
+        entries.resize_with(range.len(), create_new_entry_with_max_width);
         for (entry, (id, model)) in entries.iter().zip(models) {
             Self::update_entry(&self.logger, entry, id, &model);
         }

lib/rust/ensogl/component/list-view/src/lib.rs

@@ -39,6 +39,7 @@ use enso_frp as frp;
 use ensogl_core::application;
 use ensogl_core::application::shortcut;
 use ensogl_core::application::Application;
+use ensogl_core::data::color;
 use ensogl_core::display;
 use ensogl_core::display::scene::layer::LayerId;
 use ensogl_core::display::shape::*;
@@ -98,16 +99,16 @@ pub mod background {
 
     ensogl_core::define_shape_system! {
         below = [selection];
-        (style:Style) {
+        (style: Style, shadow_alpha: f32, corners_radius_px: f32, color: Vector4) {
             let sprite_width  : Var<Pixels> = "input_size.x".into();
             let sprite_height : Var<Pixels> = "input_size.y".into();
             let width         = sprite_width - SHADOW_PX.px() * 2.0 - SHAPE_PADDING.px() * 2.0;
             let height        = sprite_height - SHADOW_PX.px() * 2.0 - SHAPE_PADDING.px() * 2.0;
-            let color         = style.get_color(theme::widget::list_view::background);
+            let color         = Var::<color::Rgba>::from(color);
-            let rect          = Rect((&width,&height)).corners_radius(CORNER_RADIUS_PX.px());
+            let rect          = Rect((&width,&height)).corners_radius(corners_radius_px);
             let shape         = rect.fill(color);
 
-            let shadow  = shadow::from_shape(rect.into(),style);
+            let shadow = shadow::from_shape_with_alpha(rect.into(), &shadow_alpha, style);
 
             (shadow + shape).into()
         }
@@ -154,6 +155,11 @@ impl<E: Entry> Model<E> {
         Model { app, entries, selection, background, scrolled_area, display_object }
     }
 
+    fn show_background_shadow(&self, value: bool) {
+        let alpha = if value { 1.0 } else { 0.0 };
+        self.background.shadow_alpha.set(alpha);
+    }
+
     fn padding(&self) -> f32 {
         // FIXME : StyleWatch is unsuitable here, as it was designed as an internal tool for shape
         // system (#795)
@@ -161,23 +167,29 @@ impl<E: Entry> Model<E> {
         styles.get_number(ensogl_hardcoded_theme::application::searcher::padding)
     }
 
+    fn doubled_padding_with_shape_padding(&self) -> f32 {
+        2.0 * self.padding() + SHAPE_PADDING
+    }
+
     /// Update the displayed entries list when _view_ has changed - the list was scrolled or
     /// resized.
     fn update_after_view_change(&self, view: &View) {
         let visible_entries = Self::visible_entries(view, self.entries.entry_count());
-        let padding_px = self.padding();
+        let padding = self.doubled_padding_with_shape_padding();
-        let padding = 2.0 * padding_px + SHAPE_PADDING;
         let padding = Vector2(padding, padding);
+        let entry_width = view.size.x - padding.x;
         let shadow = Vector2(2.0 * SHADOW_PX, 2.0 * SHADOW_PX);
         self.entries.set_position_x(-view.size.x / 2.0);
         self.background.size.set(view.size + padding + shadow);
         self.scrolled_area.set_position_y(view.size.y / 2.0 - view.position_y);
-        self.entries.update_entries(visible_entries);
+        self.entries.update_entries(visible_entries, entry_width);
     }
 
     fn set_entries(&self, provider: entry::AnyModelProvider<E>, view: &View) {
         let visible_entries = Self::visible_entries(view, provider.entry_count());
-        self.entries.update_entries_new_provider(provider, visible_entries);
+        let padding = self.doubled_padding_with_shape_padding();
+        let entry_width = view.size.x - padding;
+        self.entries.update_entries_new_provider(provider, visible_entries, entry_width);
     }
 
     fn visible_entries(View { position_y, size }: &View, entry_count: usize) -> Range<entry::Id> {
@@ -255,6 +267,9 @@ ensogl_core::define_endpoints! {
         set_entries(entry::AnyModelProvider<E>),
         select_entry(entry::Id),
         chose_entry(entry::Id),
+        show_background_shadow(bool),
+        set_background_corners_radius(f32),
+        set_background_color(color::Rgba),
     }
 
     Output {
@@ -311,9 +326,28 @@ where E::Model: Default
         let view_y = DEPRECATED_Animation::<f32>::new(network);
         let selection_y = DEPRECATED_Animation::<f32>::new(network);
         let selection_height = DEPRECATED_Animation::<f32>::new(network);
+        let style = StyleWatchFrp::new(&scene.style_sheet);
+        use theme::widget::list_view as list_view_style;
+        let default_background_color = style.get_color(list_view_style::background);
 
         frp::extend! { network
 
+            // === Background ===
+
+            init <- source_();
+            default_show_background_shadow <- init.constant(true);
+            show_background_shadow <- any(
+                &default_show_background_shadow,&frp.show_background_shadow);
+            eval show_background_shadow ((t) model.show_background_shadow(*t));
+            default_background_corners_radius <- init.constant(background::CORNER_RADIUS_PX);
+            background_corners_radius <- any(
+                &default_background_corners_radius,&frp.set_background_corners_radius);
+            eval background_corners_radius ((px) model.background.corners_radius_px.set(*px));
+            default_background_color <- all(&default_background_color,&init)._0();
+            background_color <- any(&default_background_color,&frp.set_background_color);
+            eval background_color ((color) model.background.color.set(color.into()));
+
+
             // === Mouse Position ===
 
             mouse_in <- all_with(&mouse.position,&frp.size,f!((pos,size)
@@ -329,6 +363,7 @@ where E::Model: Default
 
 
             // === Selected Entry ===
+
             frp.source.selected_entry <+ frp.select_entry.map(|id| Some(*id));
 
             selection_jump_on_one_up  <- frp.move_selection_up.constant(-1);
@@ -452,6 +487,7 @@ where E::Model: Default
             ));
         }
 
+        init.emit(());
         view_y.set_target_value(MAX_SCROLL);
         view_y.skip();
         frp.scroll_jump(MAX_SCROLL);

lib/rust/ensogl/component/text/Cargo.toml

@@ -16,7 +16,6 @@ enso-types = { path = "../../../types" }
 ensogl-core = { path = "../../core" }
 ensogl-text-embedded-fonts = { path = "embedded-fonts" }
 ensogl-text-msdf-sys = { path = "msdf-sys" }
-ensogl-hardcoded-theme = { path = "../../app/theme/hardcoded" }
 const_format = "0.2.22"
 xi-rope = { version = "0.3.0" }
 

lib/rust/ensogl/component/text/embedded-fonts/build.rs

@@ -75,16 +75,8 @@ mod deja_vu {
         std::io::copy(&mut input_stream, &mut output_stream).unwrap();
     }
 
-    pub const FONTS_TO_EXTRACT: &[&str] = &[
+    pub const FONTS_TO_EXTRACT: &[&str] =
-        "DejaVuSans",
+        &["DejaVuSans", "DejaVuSans-Bold", "DejaVuSansMono", "DejaVuSansMono-Bold"];
-        "DejaVuSans-ExtraLight",
-        "DejaVuSansMono",
-        "DejaVuSansMono-Bold",
-        "DejaVuSansMono-Oblique",
-        "DejaVuSansCondensed",
-        "DejaVuSerif",
-        "DejaVuSerifCondensed",
-    ];
 
     pub fn extract_all_fonts(package_path: &path::Path) {
         for font_name in FONTS_TO_EXTRACT {

lib/rust/ensogl/component/text/src/component/area.rs

@@ -271,6 +271,12 @@ ensogl_core::define_endpoints! {
         /// MSDF texture, etc.).
         set_font              (String),
         set_content           (String),
+        /// Set content, truncating the trailing characters on every line to fit a width in pixels
+        /// when rendered with current font and font size. The truncated substrings are replaced
+        /// with an ellipsis character ("…").
+        ///
+        /// Unix (`\n`) and MS-DOS (`\r\n`) style line endings are recognized.
+        set_content_truncated (String, f32),
     }
     Output {
         pointer_style   (cursor::Style),
@@ -480,6 +486,10 @@ impl Area {
                 input.insert(s);
                 input.remove_all_cursors();
             });
+            input.set_content <+ input.set_content_truncated.map(f!(((text, max_width_px)) {
+                m.text_truncated_with_ellipsis(text.clone(), m.default_font_size(), *max_width_px)
+            }));
+
 
             // === Font ===
 
@@ -871,6 +881,86 @@ impl AreaModel {
         last_offset - cursor_offset
     }
 
+    #[cfg(not(target_arch = "wasm32"))]
+    fn line_truncated_with_ellipsis(&self, line: &str, _: style::Size, _: f32) -> String {
+        line.to_string()
+    }
+
+    /// Truncate a `line` of text if its length on screen exceeds `max_width_px` when rendered
+    /// using the current font at `font_size`. Return the truncated string with an ellipsis ("…")
+    /// character appended, or `content` if not truncated.
+    ///
+    /// The truncation point is chosen such that the resulting string with ellipsis will fit in
+    /// `max_width_px` if possible. The `line` must not contain newline characters.
+    #[cfg(target_arch = "wasm32")]
+    fn line_truncated_with_ellipsis(
+        &self,
+        line: &str,
+        font_size: style::Size,
+        max_width_px: f32,
+    ) -> String {
+        const ELLIPSIS: char = '\u{2026}';
+        let mut pen = pen::Pen::new(&self.glyph_system.borrow().font);
+        let mut truncation_point = 0.bytes();
+        let truncate = line.char_indices().any(|(i, ch)| {
+            let char_info = pen::CharInfo::new(ch, font_size.raw);
+            let pen_info = pen.advance(Some(char_info));
+            let next_width = pen_info.offset + char_info.size;
+            if next_width > max_width_px {
+                return true;
+            }
+            let width_of_ellipsis = pen::CharInfo::new(ELLIPSIS, font_size.raw).size;
+            let char_length: Bytes = ch.len_utf8().into();
+            if next_width + width_of_ellipsis <= max_width_px {
+                truncation_point = Bytes::from(i) + char_length;
+            }
+            false
+        });
+        if truncate {
+            let truncated_content = line[..truncation_point.as_usize()].to_string();
+            truncated_content + String::from(ELLIPSIS).as_str()
+        } else {
+            line.to_string()
+        }
+    }
+
+    /// Truncate trailing characters on every line of `text` that exceeds `max_width_px` when
+    /// rendered using the current font at `font_size`. Return `text` with every truncated
+    /// substring replaced with an ellipsis character ("…").
+    ///
+    /// The truncation point of every line is chosen such that the truncated string with ellipsis
+    /// will fit in `max_width_px` if possible. Unix (`\n`) and MS-DOS (`\r\n`) style line endings
+    /// are recognized and preserved in the returned string.
+    fn text_truncated_with_ellipsis(
+        &self,
+        text: String,
+        font_size: style::Size,
+        max_width_px: f32,
+    ) -> String {
+        let lines = text.split_inclusive('\n');
+        /// Return the length of a trailing Unix (`\n`) or MS-DOS (`\r\n`) style line ending in
+        /// `s`, or 0 if not found.
+        fn length_of_trailing_line_ending(s: &str) -> usize {
+            if s.ends_with("\r\n") {
+                2
+            } else if s.ends_with('\n') {
+                1
+            } else {
+                0
+            }
+        }
+        let tuples_of_lines_and_endings =
+            lines.map(|line| line.split_at(line.len() - length_of_trailing_line_ending(line)));
+        let lines_truncated_with_ellipsis = tuples_of_lines_and_endings.map(|(line, ending)| {
+            self.line_truncated_with_ellipsis(line, font_size, max_width_px) + ending
+        });
+        lines_truncated_with_ellipsis.collect()
+    }
+
+    fn default_font_size(&self) -> style::Size {
+        *self.buffer.style.get().size.default()
+    }
+
     fn new_line(&self, index: usize) -> Line {
         let line = Line::new(&self.logger);
         let y_offset = -((index + 1) as f32) * LINE_HEIGHT + LINE_VERTICAL_OFFSET;

lib/rust/ensogl/core/src/display/scene/layer.rs

@@ -1097,6 +1097,9 @@ impl<T> ShapeSystemInfoTemplate<T> {
 /// scene.layers.add_shapes_order_dependency::<shape::View, input::port::hover::View>();
 /// scene.layers.add_shapes_order_dependency::<input::port::hover::View, input::port::viz::View>();
 /// ```
+///
+/// A shape listed on the left side of an arrow (`->`) will be ordered below the shape listed on
+/// the right side of the arrow.
 #[macro_export]
 macro_rules! shapes_order_dependencies {
     ($scene:expr => {

lib/rust/shapely/macros/src/derive_entry_point.rs

@@ -7,6 +7,7 @@ use crate::prelude::*;
 // ===================
 
 fn crate_name_to_fn_name(name: &str) -> String {
+    let name = name.replace("debug-scene-", "");
     let name = name.replace("ensogl-example-", "");
     let name = name.replace("enso-example-", "");
     let name = name.replace("enso-", "");