Initial Project View (https://github.com/enso-org/ide/pull/159)

Original commit: bfe5377ba5

gui/Cargo.toml

@@ -14,6 +14,7 @@ members = [
     "lib/ide/ast/macros",
     "lib/ide/file-manager",
     "lib/ide/file-manager/mock-server",
+    "lib/ide/",
     "lib/ide/json-rpc",
     "lib/ide/parser",
     "lib/ide/utils",

gui/app/src/index.js

@@ -73,7 +73,7 @@ async function download_content(cfg) {
 // ====================
 
 /// The name of the main scene in the WASM binary.
-let main_scene_name = 'shapes'
+let main_scene_name = 'ide'
 
 /// Prefix name of each scene defined in the WASM binary.
 let wasm_fn_pfx = "run_example_"

gui/lib/core/msdf-sys/src/lib.rs

@@ -27,7 +27,7 @@ use wasm_bindgen::prelude::Closure;
 
 /// Add initialization callback
 ///
-/// The callback passed as argument will be called once the msdfgen libirary
+/// The callback passed as argument will be called once the msdfgen library
 /// will be initialized.
 pub fn run_once_initialized<F>(callback:F)
 where F : 'static + FnOnce() {

gui/lib/core/src/animation/physics/inertia.rs

@@ -242,7 +242,7 @@ impl PhysicsProperties {
 
 impl PhysicsProperties {
     /// Safe accessor to modify `KinematicsProperties`.
-    pub fn mod_kinematics<F:FnOnce(&mut KinematicsProperties)>(&mut self, f:F) {
+    pub fn modify_kinematics<F:FnOnce(&mut KinematicsProperties)>(&mut self, f:F) {
         let mut kinematics = self.kinematics();
         f(&mut kinematics);
         self.set_kinematics(kinematics);
@@ -254,7 +254,7 @@ impl PhysicsProperties {
     }
 
     /// Safe accessor to modify `SpringProperties`.
-    pub fn mod_spring<F:FnOnce(&mut SpringProperties)>(&mut self, f:F) {
+    pub fn modify_spring<F:FnOnce(&mut SpringProperties)>(&mut self, f:F) {
         let mut spring = self.spring();
         f(&mut spring);
         self.set_spring(spring);
@@ -266,7 +266,7 @@ impl PhysicsProperties {
     }
 
     /// Safe accessor to modify `DragProperties`.
-    pub fn mod_drag<F:FnOnce(&mut DragProperties)>(&mut self, f:F) {
+    pub fn modify_drag<F:FnOnce(&mut DragProperties)>(&mut self, f:F) {
         let mut drag = self.drag();
         f(&mut drag);
         self.set_drag(drag);
@@ -278,7 +278,7 @@ impl PhysicsProperties {
     }
 
     /// Safe accessor to modify `SimulationThresholds`.
-    pub fn mod_thresholds<F:FnOnce(&mut SimulationThresholds)>(&mut self, f:F) {
+    pub fn modify_thresholds<F:FnOnce(&mut SimulationThresholds)>(&mut self, f:F) {
         let mut thresholds = self.thresholds();
         f(&mut thresholds);
         self.set_thresholds(thresholds);
@@ -362,7 +362,7 @@ impl PhysicsSimulator {
 
             let fixed_point = properties.spring().fixed_point;
             let thresholds  = properties.thresholds();
-            properties.mod_kinematics(|kinematics| {
+            properties.modify_kinematics(|kinematics| {
                 let speed    = kinematics.velocity.magnitude();
                 let position = kinematics.position();
                 let distance = (position - fixed_point).magnitude();
@@ -398,7 +398,7 @@ fn simulate(properties:&mut PhysicsProperties, delta_ms:f64) -> Vector3<f32> {
     let spring        = properties.spring();
     let drag          = properties.drag();
     let mut net_force = zero();
-    properties.mod_kinematics(|mut kinematics| {
+    properties.modify_kinematics(|mut kinematics| {
         net_force += spring.force(&kinematics);
         net_force += drag.force(&kinematics);
         let delta_seconds = delta_ms / 1000.0;

gui/lib/core/src/display/camera/camera2d.rs

@@ -7,7 +7,9 @@ use crate::data::dirty;
 use crate::display::layout::types::*;
 use crate::display::object::DisplayObjectData;
 use crate::data::dirty::traits::*;
-use crate::control::callback::{XCallbackRegistry1, CallbackHandle, XCallbackMut1Fn};
+use crate::control::callback::XCallbackRegistry1;
+use crate::control::callback::XCallbackMut1Fn;
+use crate::control::callback::CallbackHandle;
 
 use nalgebra::Vector2;
 use nalgebra::Vector3;

gui/lib/core/src/display/navigation/navigator.rs

@@ -93,18 +93,18 @@ impl Navigator {
             let y = pan.movement.y * scale;
             let z = 0.0;
 
-            properties.mod_spring(|spring| { spring.fixed_point += Vector3::new(x, y, z); });
+            properties.modify_spring(|spring| { spring.fixed_point += Vector3::new(x, y, z); });
         });
 
         let transform       = camera.transform();
         let resize_callback = camera.add_screen_update_callback(
             enclose!((mut properties,transform) move |_:&Vector2<f32>| {
                 let position = transform.position();
-                properties.mod_kinematics(|kinematics| {
+                properties.modify_kinematics(|kinematics| {
                     kinematics.set_position(position);
                     kinematics.set_velocity(Vector3::new(0.0, 0.0, 0.0));
                 });
-                properties.mod_spring(|spring| spring.fixed_point = position);
+                properties.modify_spring(|spring| spring.fixed_point = position);
             })
         );
 
@@ -126,7 +126,7 @@ impl Navigator {
                 let min_zoom     = camera.clipping().near  + min_zoom;
                 position.z       = clamp(position.z, min_zoom, max_zoom);
 
-                properties.mod_spring(|spring| spring.fixed_point = position);
+                properties.modify_spring(|spring| spring.fixed_point = position);
         };
         (resize_callback, NavigatorEvents::new(dom, panning_callback, zoom_callback, zoom_speed))
     }

gui/lib/core/src/display/shape/text/text_field.rs

@@ -42,6 +42,7 @@ pub struct TextFieldProperties {
     /// Text size being a line height in pixels.
     pub text_size: f32,
     /// Base color of displayed text.
+    //TODO: base_color should use definitions in core/data/color
     pub base_color: Vector4<f32>,
     /// Size of this component.
     pub size: Vector2<f32>,
@@ -83,6 +84,16 @@ shared! { TextField
             self.display_object.set_position(position);
         }
 
+        /// Get position of this TextField.
+        pub fn position(&self) -> Vector3<f32> {
+            self.display_object.position()
+        }
+
+        /// Get size.
+        pub fn size(&self) -> Vector2<f32> {
+            self.properties.size
+        }
+
         /// Scroll text by given offset in pixels.
         pub fn scroll(&mut self, offset:Vector2<f32>) {
             let position_change = -Vector3::new(offset.x,offset.y,0.0);

gui/lib/core/tests/physics_simulator.rs

@@ -77,7 +77,7 @@ mod tests {
             let y = 240.0 * random() as f32;
             let z = 0.0;
             let position = Vector3::new(x, y, z);
-            properties.mod_spring(|spring| spring.fixed_point = position);
+            properties.modify_spring(|spring| spring.fixed_point = position);
             target.mod_position(|t| *t = position);
         });
 

gui/lib/gui/Cargo.toml

@@ -7,12 +7,12 @@ edition = "2018"
 [lib]
 crate-type = ["cdylib"]
 
-
 [dependencies]
 basegl               = { version = "0.1.0"  , path = "../core"          }
 basegl-core-msdf-sys = { version = "0.1.0"  , path = "../core/msdf-sys" }
 basegl-system-web    = { version = "0.1.0"  , path = "../system/web"    }
 enso-frp             = { version = "0.1.0"  , path = "../frp"           }
+ide                  = { version = "0.1.0"  , path = "../ide"           }
 
 enso-prelude         = { version = "0.1.0"  , path = "../prelude"       }
 wasm-bindgen         = { version = "0.2.58" , features = ["nightly"]    }

gui/lib/gui/src/css3d_system.rs

@@ -10,9 +10,9 @@ use basegl::display::object::DisplayObjectOps;
 use basegl::display::symbol::geometry::Sprite;
 use basegl::display::symbol::geometry::SpriteSystem;
 use basegl::display::world::*;
+use basegl::display::navigation::navigator::Navigator;
 use basegl::prelude::*;
 use basegl::animation::animator::fixed_step::FixedStepAnimator;
-use basegl::display::navigation::navigator::Navigator;
 
 use nalgebra::Vector2;
 use nalgebra::Vector3;

gui/lib/gui/src/ide.rs

@@ -0,0 +1,25 @@
+//! This module defines the entrypoint function for IDE.
+
+use wasm_bindgen::prelude::*;
+
+use basegl::system::web;
+use ide::run_ide;
+
+/// IDE startup function.
+#[wasm_bindgen]
+#[allow(dead_code)]
+pub fn run_example_ide() {
+    web::forward_panic_hook_to_console();
+    web::set_stdout();
+
+    // FIXME: This code is temporary. It's used to remove the loader UI.
+    basegl_core_msdf_sys::run_once_initialized(|| {
+        web::get_element_by_id("loader").map(|t| {
+            t.parent_node().map(|p| {
+                p.remove_child(&t).unwrap()
+            })
+        }).ok();
+
+        run_ide()
+    });
+}

gui/lib/gui/src/lib.rs

@@ -25,5 +25,6 @@ pub mod sprite_system;
 pub mod text_field;
 pub mod text_typing;
 pub mod css3d_system;
+pub mod ide;
 
 use enso_prelude as prelude;

gui/lib/ide/Cargo.toml

@@ -0,0 +1,46 @@
+[package]
+name    = "ide"
+version = "0.1.0"
+authors = ["Enso Team <contact@luna-lang.org>"]
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+basegl                   = { version = "0.1.0"  , path = "../core"          }
+enso-prelude             = { version = "0.1.0"  , path = "../prelude"       }
+file-manager-client      = { version = "0.1.0"  , path = "file-manager"     }
+json-rpc                 = { version = "0.1.0"  , path = "json-rpc"         }
+utils                    = { version = "0.1.0"  , path = "utils"            }
+basegl-core-msdf-sys     = { version = "0.1.0"  , path = "../core/msdf-sys" }
+shapely                  = { version = "0.1.0"  , path = "../shapely/impl"  }
+
+console_error_panic_hook = { version = "0.1.6"                           }
+futures                  = { version = "0.3.1"                           }
+nalgebra                 = { version = "0.19.0"                          }
+js-sys                   = { version = "0.3.35"                          }
+serde                    = { version = "1.0", features = ["derive"]      }
+serde_json               = { version = "1.0"                             }
+uuid                     = { version = "0.8", features = ["serde", "v5"] }
+wasm-bindgen             = { version = "0.2.58"                          }
+wasm-bindgen-test        = { version = "0.3.8"                           }
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+websocket = "0.23.0"
+
+[dependencies.web-sys]
+version = "0.3.22"
+features = [
+  'Blob',
+  'console',
+  'CloseEvent',
+  'Document',
+  'Element',
+  "ErrorEvent",
+  "MessageEvent",
+  'HtmlElement',
+  'Node',
+  'WebSocket',
+  'Window',
+]

gui/lib/ide/json-rpc/src/handler.rs

@@ -321,6 +321,7 @@ impl<Notification> Handler<Notification> {
         match event {
             TransportEvent::TextMessage(msg) =>
                 self.process_incoming_message(msg),
+            TransportEvent::Opened => {}
             TransportEvent::Closed => {
                 // Dropping all ongoing calls will cancel their futures.
                 self.clear_ongoing_requests();

gui/lib/ide/json-rpc/src/transport.rs

@@ -25,6 +25,8 @@ pub trait Transport : Debug {
 pub enum TransportEvent {
     /// A text message with has been received.
     TextMessage(String),
+    /// A socket has been opened.
+    Opened,
     /// A socket has been closed by the peer.
     Closed,
 }

gui/lib/ide/src/lib.rs

@@ -0,0 +1,34 @@
+//! Main library crate for IDE. It includes implementation of
+//! controllers, view logic and code that wraps them all together.
+
+#![warn(missing_docs)]
+#![warn(trivial_casts)]
+#![warn(trivial_numeric_casts)]
+#![warn(unused_import_braces)]
+#![warn(unused_qualifications)]
+#![warn(unsafe_code)]
+#![warn(missing_copy_implementations)]
+#![warn(missing_debug_implementations)]
+
+#[allow(unused)]
+pub mod todo;
+pub mod view;
+
+#[allow(missing_docs)]
+/// Common types that should be visible across the whole IDE crate.
+pub mod prelude {
+    pub use enso_prelude::*;
+
+    pub use futures::Future;
+    pub use futures::FutureExt;
+    pub use futures::Stream;
+    pub use futures::StreamExt;
+    pub use futures::task::LocalSpawnExt;
+}
+
+use view::project::ProjectView;
+
+/// This function is the IDE entry point responsible for setting up all views and controllers.
+pub fn run_ide() {
+    ProjectView::new().forget();
+}

gui/lib/ide/src/todo/executor.rs

@@ -0,0 +1,105 @@
+//! TODO [mwu] This module is still provisional work in progress. Currently
+//!            provided only for tests purposes, needs to be completed and
+//!            properly reviewed.
+//!
+//! Module providing the executor-related types and functions.
+
+#![allow(missing_docs)] // TODO [mwu] remove once module is done
+
+use crate::prelude::*;
+
+use futures::task::LocalSpawnExt;
+use futures::task::LocalSpawn;
+use futures::task::LocalFutureObj;
+use futures::task::SpawnError;
+use futures::executor::LocalPool;
+use futures::executor::LocalSpawner;
+
+use basegl::control::callback::CallbackHandle;
+use basegl::control::EventLoop;
+
+// TODO [mwu] If anything, likely thread local variable should be preferred.
+static mut CURRENT_SPAWNER: Option<Box<dyn LocalSpawn>> = None;
+
+// TODO [mwu] consider whether it is the "current" spawner or rather
+//            "the global" spawner. Is it available from outside the async
+//             context? Do we allow using more than one executor in the IDE?
+#[allow(unsafe_code)]
+pub fn set_global_spawner(spawner: impl LocalSpawn + 'static) {
+    unsafe {
+        CURRENT_SPAWNER = Some(Box::new(spawner));
+    }
+}
+
+#[allow(unsafe_code)]
+pub fn unset_global_spawner() {
+    unsafe {
+        CURRENT_SPAWNER = None;
+    }
+}
+
+#[allow(unsafe_code)]
+pub fn current_spawner() -> &'static mut dyn LocalSpawn {
+    unsafe {
+        CURRENT_SPAWNER.as_mut().expect("no global executor has been provided")
+    }
+}
+
+/// Spawn a task scheduled within a current executor.
+/// Panics, if called when there is no active asynchronous execution.
+pub fn spawn_task(f:impl Future<Output=()> + 'static) {
+    current_spawner().spawn_local(f).ok();
+}
+
+
+
+#[derive(Debug)]
+pub struct JsExecutor {
+    _executor   : Rc<RefCell<LocalPool>>,
+    _event_loop : EventLoop,
+    spawner     : LocalSpawner,
+    _cb_handle  : CallbackHandle,
+}
+
+impl JsExecutor {
+    pub fn new(_event_loop:EventLoop) -> JsExecutor {
+        let _executor  = LocalPool::default();
+        let spawner    = _executor.spawner();
+        let _executor  = Rc::new(RefCell::new(_executor));
+        let _cb_handle = JsExecutor::schedule_execution(_event_loop.clone(), _executor.clone());
+        JsExecutor {_executor,_event_loop,spawner,_cb_handle}
+    }
+
+    pub fn schedule_execution
+    (event_loop:EventLoop, executor:Rc<RefCell<LocalPool>>) -> CallbackHandle {
+        event_loop.add_callback(move |_| {
+            // Safe, because this is the only place borrowing executor and loop
+            // callback shall never be re-entrant.
+            let mut executor = executor.borrow_mut();
+            set_global_spawner(executor.spawner());
+            executor.run_until_stalled();
+            unset_global_spawner();
+        })
+    }
+
+    pub fn spawn
+    (&self, f:impl Future<Output = ()> + 'static)
+     -> Result<(), SpawnError> {
+        self.spawner.spawn_local(f)
+    }
+
+    pub fn add_callback<F:basegl::control::EventLoopCallback>
+    (&mut self, callback:F) -> CallbackHandle {
+        self._event_loop.add_callback(callback)
+    }
+}
+
+impl LocalSpawn for JsExecutor {
+    fn spawn_local_obj(&self, future: LocalFutureObj<'static, ()>) -> Result<(), SpawnError> {
+        self.spawner.spawn_local_obj(future)
+    }
+
+    fn status_local(&self) -> Result<(), SpawnError> {
+        self.spawner.status_local()
+    }
+}

gui/lib/ide/src/todo/mod.rs

@@ -0,0 +1,3 @@
+//! Provisional modules being work in progress.
+
+pub mod executor;

gui/lib/ide/src/view.rs

@@ -0,0 +1,15 @@
+//! A module containing view components.
+
+#![warn(unsafe_code)]
+#![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)]
+
+pub mod temporary_panel;
+pub mod project;
+pub mod layout;
+pub mod text_editor;

gui/lib/ide/src/view/layout.rs

@@ -0,0 +1,178 @@
+//! This module contains implementation of ViewLayout with a single TextEditor temporarily
+//! occupying half bottom of the screen as the default layout.
+
+use wasm_bindgen::prelude::*;
+use basegl::prelude::*;
+
+use crate::view::temporary_panel::TemporaryPadding;
+use crate::view::text_editor::TextEditor;
+use crate::view::temporary_panel::TemporaryPanel;
+
+use basegl::system::web::*;
+use basegl::display::world::World;
+use js_sys::Function;
+use nalgebra::zero;
+use nalgebra::Vector2;
+use std::rc::Rc;
+use std::cell::RefCell;
+use wasm_bindgen::JsCast;
+use web_sys::KeyboardEvent;
+use web_sys::HtmlElement;
+
+
+
+// ==================
+// === LayoutMode ===
+// ==================
+//TODO: LayoutMode is a temporary enumeration, it will be replaced by proper Panel impl.
+
+/// Defines the element's layout mode. It can fully occupy the screen or only half of it.
+#[derive(Clone,Copy,Debug)]
+pub enum LayoutMode {
+    #[allow(missing_docs)]
+    Full,
+    #[allow(missing_docs)]
+    Half
+}
+
+impl Default for LayoutMode {
+    fn default() -> Self {
+        Self::Half
+    }
+}
+
+
+
+// ========================
+// === KeyboardListener ===
+// ========================
+
+type KeyboardClosure = Closure<dyn FnMut(KeyboardEvent)>;
+
+#[derive(Debug)]
+struct KeyboardListener {
+    callback   : KeyboardClosure,
+    element    : HtmlElement,
+    event_type : String
+}
+
+impl KeyboardListener {
+    fn new(element:&HtmlElement, event_type:String, callback:KeyboardClosure) -> Self {
+        let element = element.clone();
+        Self {callback,element,event_type}
+    }
+}
+
+impl Drop for KeyboardListener {
+    fn drop(&mut self) {
+        let callback : &Function = self.callback.as_ref().unchecked_ref();
+        self.element.remove_event_listener_with_callback(&self.event_type, callback).ok();
+    }
+}
+
+
+
+// ==================
+// === ViewLayout ===
+// ==================
+
+shared! { ViewLayout
+
+/// Initial implementation of ViewLayout with a single TextEditor. Pressing ctrl+f toggles
+/// fullscreen mode.
+#[derive(Debug)]
+pub struct ViewLayoutData {
+    text_editor  : TextEditor,
+    key_listener : Option<KeyboardListener>,
+    layout_mode  : LayoutMode,
+    size         : Vector2<f32>
+}
+
+impl {
+    /// Switches LayoutMode between Half and Full.
+    pub fn switch_layout_mode(&mut self) {
+        if let LayoutMode::Half = self.layout_mode {
+            self.set_layout_mode(LayoutMode::Full)
+        } else {
+            self.set_layout_mode(LayoutMode::Half)
+        }
+    }
+
+    /// Sets ViewLayout size.
+    pub fn set_size(&mut self, size:Vector2<f32>) {
+        self.size = size;
+        self.recalculate_layout();
+    }
+}}
+
+
+// === Private Methods ===
+
+impl ViewLayoutData {
+    fn set_layout_mode(&mut self, layout_mode:LayoutMode) {
+        self.layout_mode = layout_mode;
+        self.recalculate_layout();
+    }
+
+    fn recalculate_layout(&mut self) {
+        let size            = self.size;
+        let (position,size) = match self.layout_mode {
+            LayoutMode::Full => {
+                let position   = Vector2::new(0.0,size.y);
+                (position,size)
+            },
+            LayoutMode::Half => {
+                let position = Vector2::new(0.0,size.y / 2.0);
+                let size     = Vector2::new(size.x,size.y / 2.0);
+                (position,size)
+            }
+        };
+        let padding = TemporaryPadding {
+            left   : 10.0,
+            top    : 0.0,
+            right  : 10.0,
+            bottom : 0.0
+        };
+        self.text_editor.set_padding(padding);
+        self.text_editor.set_size(size);
+        self.text_editor.set_position(position);
+        self.text_editor.update();
+    }
+}
+
+impl ViewLayout {
+    /// Creates a new ViewLayout with a single TextEditor.
+    pub fn default(world:&World) -> Self {
+        let text_editor  = TextEditor::new(&world);
+        let key_listener = None;
+        let layout_mode  = default();
+        let size         = zero();
+        let data         = ViewLayoutData {text_editor,key_listener,layout_mode,size};
+        let rc           = Rc::new(RefCell::new(data));
+        Self {rc}.init(world)
+    }
+
+    fn init_keyboard(self) -> Self {
+        let view_layout = self.clone();
+        let closure     = move |event:KeyboardEvent| {
+            const F_KEY : u32 = 70;
+            if event.ctrl_key() && event.key_code() == F_KEY {
+                view_layout.switch_layout_mode();
+                event.prevent_default();
+            }
+        };
+        let closure : Box<dyn FnMut(KeyboardEvent)> = Box::new(closure);
+        let callback                                = Closure::wrap(closure);
+        let body                                    = document().unwrap().body().unwrap();
+        let key_listener = KeyboardListener::new(&body, "keydown".into(), callback);
+        self.rc.borrow_mut().key_listener = Some(key_listener);
+        self
+    }
+
+    fn init(self, world:&World) -> Self {
+        let screen = world.scene().camera().screen();
+        let size   = Vector2::new(screen.width,screen.height);
+        self.set_size(size);
+        self.init_keyboard()
+    }
+}

gui/lib/ide/src/view/project.rs

@@ -0,0 +1,81 @@
+//! This module contains ProjectView, the main view, responsible for managing TextEditor and
+//! GraphEditor.
+
+use crate::prelude::*;
+
+use super::layout::ViewLayout;
+
+use basegl::display::world::WorldData;
+use basegl::display::world::World;
+use basegl::system::web;
+use basegl::control::callback::CallbackHandle;
+
+use nalgebra::Vector2;
+use shapely::shared;
+
+
+
+// ===================
+// === ProjectView ===
+// ===================
+
+shared! { ProjectView
+
+    /// ProjectView is the main view of the project, holding instances of TextEditor and
+    /// GraphEditor.
+    #[derive(Debug)]
+    pub struct ProjectViewData {
+        world           : World,
+        layout          : ViewLayout,
+        resize_callback: Option<CallbackHandle>
+    }
+
+    impl {
+        /// Set view size.
+        pub fn set_size(&mut self, size:Vector2<f32>) {
+            self.layout.set_size(size);
+        }
+    }
+}
+
+impl Default for ProjectViewData {
+    fn default() -> Self {
+        let world           = WorldData::new(&web::body());
+        let layout          = ViewLayout::default(&world);
+        let resize_callback = None;
+        ProjectViewData{world,layout,resize_callback}
+    }
+}
+
+impl ProjectView {
+    /// Create new ProjectView.
+    pub fn new() -> Self {
+        let data = default();
+        Self{rc:data}.init()
+    }
+
+    fn init(self) -> Self {
+        let scene = self.with_borrowed(|data| data.world.scene());
+        let weak  = self.downgrade();
+        let resize_callback = scene.camera().add_screen_update_callback(
+            move |size:&Vector2<f32>| {
+                if let Some(this) = weak.upgrade() {
+                    this.set_size(*size)
+                }
+            }
+        );
+        self.with_borrowed(move |data| data.resize_callback = Some(resize_callback));
+        self
+    }
+
+    /// Forgets ProjectView, so it won't get dropped when it goes out of scope.
+    pub fn forget(self) {
+        std::mem::forget(self)
+    }
+}
+
+impl Default for ProjectView {
+    fn default() -> Self {
+        Self::new()
+    }
+}

gui/lib/ide/src/view/temporary_panel.rs

@@ -0,0 +1,52 @@
+//! This module contains a temporary definition of Panel. There is a plan to implement proper
+//! panels in the future.
+
+use nalgebra::Vector2;
+
+
+
+// ===============
+// === Padding ===
+// ===============
+
+/// A struct containing the padding values.
+/// This code is temporary and should be used with cautious.
+#[derive(Clone,Copy,Debug,Default)]
+pub struct TemporaryPadding {
+    #[allow(missing_docs)]
+    pub left : f32,
+    #[allow(missing_docs)]
+    pub top : f32,
+    #[allow(missing_docs)]
+    pub right : f32,
+    #[allow(missing_docs)]
+    pub bottom : f32
+}
+
+
+
+// =============
+// === Panel ===
+// =============
+
+/// A trait defining a panel interface.
+/// This code is temporary and should be used with cautious.
+pub trait TemporaryPanel {
+    /// Sets padding.
+    fn set_padding(&mut self, padding: TemporaryPadding);
+
+    /// Gets padding.
+    fn padding(&self) -> TemporaryPadding;
+
+    /// Sets size.
+    fn set_size(&mut self, size:Vector2<f32>);
+
+    /// Gets size.
+    fn size(&self) -> Vector2<f32>;
+
+    /// Sets position.
+    fn set_position(&mut self, position:Vector2<f32>);
+
+    /// Gets position.
+    fn position(&self) -> Vector2<f32>;
+}

gui/lib/ide/src/view/text_editor.rs

@@ -0,0 +1,98 @@
+//! This module contains TextEditor, an UiComponent to edit Enso Modules or Text Files.
+
+use crate::prelude::*;
+
+use super::temporary_panel::TemporaryPanel;
+use super::temporary_panel::TemporaryPadding;
+
+use basegl::display::object::DisplayObjectOps;
+use basegl::display::shape::text::glyph::font::FontRegistry;
+use basegl::display::shape::text::text_field::TextField;
+use basegl::display::shape::text::text_field::TextFieldProperties;
+use basegl::display::world::*;
+
+use nalgebra::Vector2;
+use nalgebra::zero;
+
+
+// ==================
+// === TextEditor ===
+// ==================
+
+/// TextEditor allows us to edit text files or Enso Modules. Extensible code highlighting is
+/// planned to be implemented for it.
+#[derive(Clone,Debug)]
+pub struct TextEditor {
+    text_field : TextField,
+    padding    : TemporaryPadding,
+    position   : Vector2<f32>,
+    size       : Vector2<f32>
+}
+
+impl TextEditor {
+    /// Creates a new TextEditor.
+    pub fn new(world:&World) -> Self {
+        let scene        = world.scene();
+        let camera       = scene.camera();
+        let screen       = camera.screen();
+        let mut fonts    = FontRegistry::new();
+        let font         = fonts.get_or_load_embedded_font("DejaVuSansMono").unwrap();
+        let padding      = default();
+        let position     = zero();
+        let size         = Vector2::new(screen.width, screen.height);
+        let black        = Vector4::new(0.0,0.0,0.0,1.0);
+        let base_color   = black;
+        let text_size    = 16.0;
+        let properties   = TextFieldProperties {font,text_size,base_color,size};
+        let text_field   = TextField::new(&world,properties);
+        world.add_child(&text_field);
+
+        Self {text_field,padding,position,size}.initialize()
+    }
+
+    fn initialize(self) -> Self {
+        self.update();
+        self
+    }
+
+    /// Updates the underlying display object.
+    pub fn update(&self) {
+        let padding  = self.padding;
+        let position = self.position;
+        let position = Vector3::new(position.x + padding.left, position.y + padding.bottom, 0.0);
+        self.text_field.set_position(position);
+        // TODO: set text field size once the property change will be supported.
+        // let padding  = Vector2::new(padding.left + padding.right, padding.top + padding.bottom);
+        // self.text_field.set_size(self.dimensions - padding);
+        self.text_field.update();
+    }
+}
+
+impl TemporaryPanel for TextEditor {
+    fn set_padding(&mut self, padding: TemporaryPadding) {
+        self.padding = padding;
+    }
+
+    fn padding(&self) -> TemporaryPadding {
+        self.padding
+    }
+
+    fn set_size(&mut self, size:Vector2<f32>) {
+        self.size = size;
+        self.update();
+    }
+
+    fn size(&self) -> Vector2<f32> {
+        self.text_field.size()
+    }
+
+    fn set_position(&mut self, position:Vector2<f32>) {
+        self.position = position;
+        self.update();
+    }
+
+    fn position(&self) -> Vector2<f32> {
+        let position = self.text_field.position();
+        Vector2::new(position.x, position.y)
+    }
+}

gui/lib/shapely/impl/src/shared.rs

@@ -212,14 +212,6 @@ macro_rules! shared_struct {
             $(#[$($meta)*])*
             pub struct [<Weak $name>] <$($params)*> { weak: Weak<RefCell<$name_mut<$($params)*>>> }
 
-            impl<$($params)*> $name <$($params)*> {
-                /// Downgrade the reference to weak ref.
-                pub fn downgrade(&self) -> [<Weak $name>] <$($params)*> {
-                    let weak = Rc::downgrade(&self.rc);
-                    [<Weak $name>] {weak}
-                }
-            }
-
             impl<$($params)*> Clone for [<Weak $name>] <$($params)*> {
                 fn clone(&self) -> Self {
                     let weak = self.weak.clone();
@@ -236,6 +228,26 @@ macro_rules! shared_struct {
                     self.weak.upgrade().map(|rc| $name {rc})
                 }
             }
+
+            impl<$($params)*> $name <$($params)*> {
+                /// Downgrade the reference to weak ref.
+                pub fn downgrade(&self) -> [<Weak $name>] <$($params)*> {
+                    let weak = Rc::downgrade(&self.rc);
+                    [<Weak $name>] {weak}
+                }
+
+                /// Call operation with borrowed data. Should be use in implementation of wrapper
+                /// only.
+                fn with_borrowed<F,R>(&self, operation:F) -> R
+                where F : FnOnce(&mut $name_mut<$($params)*>) -> R {
+                    operation(&mut self.rc.borrow_mut())
+                }
+
+                /// Check if the shared pointer points to the same struct as `other`.
+                pub fn identity_equals(&self, other:&Self) -> bool {
+                    Rc::ptr_eq(&self.rc,&other.rc)
+                }
+            }
         }
     };
 }