Create `iced_core` and `iced_native`

1 files changed, 0 insertions, 370 deletions

diff --git a/src/element.rs b/src/element.rs
deleted file mode 100644
index f6276fbf..00000000
--- a/src/element.rs
+++ /dev/null
@@ -1,370 +0,0 @@
-use stretch::{geometry, result};
-
-use crate::{
-    renderer, Color, Event, Hasher, Layout, MouseCursor, Node, Point, Widget,
-};
-
-/// A generic [`Widget`].
-///
-/// It is useful to build composable user interfaces that do not leak
-/// implementation details in their __view logic__.
-///
-/// If you have a [built-in widget], you should be able to use `Into<Element>`
-/// to turn it into an [`Element`].
-///
-/// [built-in widget]: widget/index.html#built-in-widgets
-/// [`Widget`]: widget/trait.Widget.html
-/// [`Element`]: struct.Element.html
-pub struct Element<'a, Message, Renderer> {
-    pub(crate) widget: Box<dyn Widget<Message, Renderer> + 'a>,
-}
-
-impl<'a, Message, Renderer> std::fmt::Debug for Element<'a, Message, Renderer> {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("Element")
-            .field("widget", &self.widget)
-            .finish()
-    }
-}
-
-impl<'a, Message, Renderer> Element<'a, Message, Renderer> {
-    /// Create a new [`Element`] containing the given [`Widget`].
-    ///
-    /// [`Element`]: struct.Element.html
-    /// [`Widget`]: widget/trait.Widget.html
-    pub fn new(
-        widget: impl Widget<Message, Renderer> + 'a,
-    ) -> Element<'a, Message, Renderer> {
-        Element {
-            widget: Box::new(widget),
-        }
-    }
-
-    /// Applies a transformation to the produced message of the [`Element`].
-    ///
-    /// This method is useful when you want to decouple different parts of your
-    /// UI and make them __composable__.
-    ///
-    /// [`Element`]: struct.Element.html
-    ///
-    /// # Example
-    /// Imagine we want to use [our counter](index.html#usage). But instead of
-    /// showing a single counter, we want to display many of them. We can reuse
-    /// the `Counter` type as it is!
-    ///
-    /// We use composition to model the __state__ of our new application:
-    ///
-    /// ```
-    /// # mod counter {
-    /// #     pub struct Counter;
-    /// # }
-    /// use counter::Counter;
-    ///
-    /// struct ManyCounters {
-    ///     counters: Vec<Counter>,
-    /// }
-    /// ```
-    ///
-    /// We can store the state of multiple counters now. However, the
-    /// __messages__ we implemented before describe the user interactions
-    /// of a __single__ counter. Right now, we need to also identify which
-    /// counter is receiving user interactions. Can we use composition again?
-    /// Yes.
-    ///
-    /// ```
-    /// # mod counter {
-    /// #     #[derive(Debug, Clone, Copy)]
-    /// #     pub enum Message {}
-    /// # }
-    /// #[derive(Debug, Clone, Copy)]
-    /// pub enum Message {
-    ///     Counter(usize, counter::Message)
-    /// }
-    /// ```
-    ///
-    /// We compose the previous __messages__ with the index of the counter
-    /// producing them. Let's implement our __view logic__ now:
-    ///
-    /// ```
-    /// # mod counter {
-    /// #     use iced::{button, Button};
-    /// #
-    /// #     #[derive(Debug, Clone, Copy)]
-    /// #     pub enum Message {}
-    /// #     pub struct Counter(button::State);
-    /// #
-    /// #     impl Counter {
-    /// #         pub fn view(&mut self) -> Button<Message> {
-    /// #             Button::new(&mut self.0, "_")
-    /// #         }
-    /// #     }
-    /// # }
-    /// #
-    /// # mod iced_wgpu {
-    /// #     use iced::{
-    /// #         button, MouseCursor, Node, Point, Rectangle, Style,
-    /// #     };
-    /// #     pub struct Renderer;
-    /// #
-    /// #     impl button::Renderer for Renderer {
-    /// #         fn draw(
-    /// #             &mut self,
-    /// #             _cursor_position: Point,
-    /// #             _bounds: Rectangle,
-    /// #             _state: &button::State,
-    /// #             _label: &str,
-    /// #             _class: button::Class,
-    /// #         ) -> MouseCursor {
-    /// #             MouseCursor::OutOfBounds
-    /// #         }
-    /// #     }
-    /// # }
-    /// #
-    /// # use counter::Counter;
-    /// #
-    /// # struct ManyCounters {
-    /// #     counters: Vec<Counter>,
-    /// # }
-    /// #
-    /// # #[derive(Debug, Clone, Copy)]
-    /// # pub enum Message {
-    /// #    Counter(usize, counter::Message)
-    /// # }
-    /// use iced::{Element, Row};
-    /// use iced_wgpu::Renderer;
-    ///
-    /// impl ManyCounters {
-    ///     pub fn view(&mut self) -> Row<Message, Renderer> {
-    ///         // We can quickly populate a `Row` by folding over our counters
-    ///         self.counters.iter_mut().enumerate().fold(
-    ///             Row::new().spacing(20),
-    ///             |row, (index, counter)| {
-    ///                 // We display the counter
-    ///                 let element: Element<counter::Message, Renderer> =
-    ///                     counter.view().into();
-    ///
-    ///                 row.push(
-    ///                     // Here we turn our `Element<counter::Message>` into
-    ///                     // an `Element<Message>` by combining the `index` and the
-    ///                     // message of the `element`.
-    ///                     element.map(move |message| Message::Counter(index, message))
-    ///                 )
-    ///             }
-    ///         )
-    ///     }
-    /// }
-    /// ```
-    ///
-    /// Finally, our __update logic__ is pretty straightforward: simple
-    /// delegation.
-    ///
-    /// ```
-    /// # mod counter {
-    /// #     #[derive(Debug, Clone, Copy)]
-    /// #     pub enum Message {}
-    /// #     pub struct Counter;
-    /// #
-    /// #     impl Counter {
-    /// #         pub fn update(&mut self, _message: Message) {}
-    /// #     }
-    /// # }
-    /// #
-    /// # use counter::Counter;
-    /// #
-    /// # struct ManyCounters {
-    /// #     counters: Vec<Counter>,
-    /// # }
-    /// #
-    /// # #[derive(Debug, Clone, Copy)]
-    /// # pub enum Message {
-    /// #    Counter(usize, counter::Message)
-    /// # }
-    /// impl ManyCounters {
-    ///     pub fn update(&mut self, message: Message) {
-    ///         match message {
-    ///             Message::Counter(index, counter_msg) => {
-    ///                 if let Some(counter) = self.counters.get_mut(index) {
-    ///                     counter.update(counter_msg);
-    ///                 }
-    ///             }
-    ///         }
-    ///     }
-    /// }
-    /// ```
-    pub fn map<F, B>(self, f: F) -> Element<'a, B, Renderer>
-    where
-        Message: 'static + Copy,
-        Renderer: 'a,
-        B: 'static,
-        F: 'static + Fn(Message) -> B,
-    {
-        Element {
-            widget: Box::new(Map::new(self.widget, f)),
-        }
-    }
-
-    /// Marks the [`Element`] as _to-be-explained_.
-    ///
-    /// The [`Renderer`] will explain the layout of the [`Element`] graphically.
-    /// This can be very useful for debugging your layout!
-    ///
-    /// [`Element`]: struct.Element.html
-    /// [`Renderer`]: trait.Renderer.html
-    pub fn explain<C: Into<Color>>(
-        self,
-        color: C,
-    ) -> Element<'a, Message, Renderer>
-    where
-        Message: 'static,
-        Renderer: 'a + renderer::Debugger,
-    {
-        Element {
-            widget: Box::new(Explain::new(self, color.into())),
-        }
-    }
-
-    pub(crate) fn compute_layout(
-        &self,
-        renderer: &mut Renderer,
-    ) -> result::Layout {
-        let node = self.widget.node(renderer);
-
-        node.0.compute_layout(geometry::Size::undefined()).unwrap()
-    }
-
-    pub(crate) fn hash_layout(&self, state: &mut Hasher) {
-        self.widget.hash_layout(state);
-    }
-}
-
-struct Map<'a, A, B, Renderer> {
-    widget: Box<dyn Widget<A, Renderer> + 'a>,
-    mapper: Box<dyn Fn(A) -> B>,
-}
-
-impl<'a, A, B, Renderer> std::fmt::Debug for Map<'a, A, B, Renderer> {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("Map").field("widget", &self.widget).finish()
-    }
-}
-
-impl<'a, A, B, Renderer> Map<'a, A, B, Renderer> {
-    pub fn new<F>(
-        widget: Box<dyn Widget<A, Renderer> + 'a>,
-        mapper: F,
-    ) -> Map<'a, A, B, Renderer>
-    where
-        F: 'static + Fn(A) -> B,
-    {
-        Map {
-            widget,
-            mapper: Box::new(mapper),
-        }
-    }
-}
-
-impl<'a, A, B, Renderer> Widget<B, Renderer> for Map<'a, A, B, Renderer>
-where
-    A: Copy,
-{
-    fn node(&self, renderer: &mut Renderer) -> Node {
-        self.widget.node(renderer)
-    }
-
-    fn on_event(
-        &mut self,
-        event: Event,
-        layout: Layout<'_>,
-        cursor_position: Point,
-        messages: &mut Vec<B>,
-    ) {
-        let mut original_messages = Vec::new();
-
-        self.widget.on_event(
-            event,
-            layout,
-            cursor_position,
-            &mut original_messages,
-        );
-
-        original_messages
-            .iter()
-            .cloned()
-            .for_each(|message| messages.push((self.mapper)(message)));
-    }
-
-    fn draw(
-        &self,
-        renderer: &mut Renderer,
-        layout: Layout<'_>,
-        cursor_position: Point,
-    ) -> MouseCursor {
-        self.widget.draw(renderer, layout, cursor_position)
-    }
-
-    fn hash_layout(&self, state: &mut Hasher) {
-        self.widget.hash_layout(state);
-    }
-}
-
-struct Explain<'a, Message, Renderer: renderer::Debugger> {
-    element: Element<'a, Message, Renderer>,
-    color: Color,
-}
-
-impl<'a, Message, Renderer> std::fmt::Debug for Explain<'a, Message, Renderer>
-where
-    Renderer: renderer::Debugger,
-{
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("Explain")
-            .field("element", &self.element)
-            .finish()
-    }
-}
-
-impl<'a, Message, Renderer> Explain<'a, Message, Renderer>
-where
-    Renderer: renderer::Debugger,
-{
-    fn new(element: Element<'a, Message, Renderer>, color: Color) -> Self {
-        Explain { element, color }
-    }
-}
-
-impl<'a, Message, Renderer> Widget<Message, Renderer>
-    for Explain<'a, Message, Renderer>
-where
-    Renderer: renderer::Debugger,
-{
-    fn node(&self, renderer: &mut Renderer) -> Node {
-        self.element.widget.node(renderer)
-    }
-
-    fn on_event(
-        &mut self,
-        event: Event,
-        layout: Layout<'_>,
-        cursor_position: Point,
-        messages: &mut Vec<Message>,
-    ) {
-        self.element
-            .widget
-            .on_event(event, layout, cursor_position, messages)
-    }
-
-    fn draw(
-        &self,
-        renderer: &mut Renderer,
-        layout: Layout<'_>,
-        cursor_position: Point,
-    ) -> MouseCursor {
-        renderer.explain(&layout, self.color);
-
-        self.element.widget.draw(renderer, layout, cursor_position)
-    }
-
-    fn hash_layout(&self, state: &mut Hasher) {
-        self.element.widget.hash_layout(state);
-    }
-}