feat: add id_container

src/widget/id_container.rs

@@ -0,0 +1,207 @@
+use iced_core::event::{self, Event};
+use iced_core::layout;
+use iced_core::mouse;
+use iced_core::overlay;
+use iced_core::renderer;
+use iced_core::widget::{Id, Tree};
+use iced_core::{Clipboard, Element, Layout, Length, Rectangle, Shell, Widget};
+pub use iced_style::container::{Appearance, StyleSheet};
+
+pub fn id_container<'a, Message: 'static, Theme, E>(
+    content: E,
+    id: Id,
+) -> IdContainer<'a, Message, Theme, crate::Renderer>
+where
+    E: Into<Element<'a, Message, Theme, crate::Renderer>>,
+    Theme: iced_style::container::StyleSheet,
+    <Theme as iced_widget::container::StyleSheet>::Style: From<crate::theme::Container>,
+{
+    IdContainer::new(content, id)
+}
+
+/// An element decorating some content.
+///
+/// It is normally used for alignment purposes.
+#[allow(missing_debug_implementations)]
+pub struct IdContainer<'a, Message, Theme, Renderer>
+where
+    Renderer: iced_core::Renderer,
+{
+    content: Element<'a, Message, Theme, Renderer>,
+    id: Id,
+}
+
+impl<'a, Message, Theme, Renderer> IdContainer<'a, Message, Theme, Renderer>
+where
+    Renderer: iced_core::Renderer,
+{
+    /// Creates an empty [`IdContainer`].
+    pub(crate) fn new<T>(content: T, id: Id) -> Self
+    where
+        T: Into<Element<'a, Message, Theme, Renderer>>,
+    {
+        IdContainer {
+            content: content.into(),
+            id,
+        }
+    }
+}
+
+impl<'a, Message, Theme, Renderer> Widget<Message, Theme, Renderer>
+    for IdContainer<'a, Message, Theme, Renderer>
+where
+    Renderer: iced_core::Renderer,
+{
+    fn children(&self) -> Vec<Tree> {
+        vec![Tree::new(&self.content)]
+    }
+
+    fn diff(&mut self, tree: &mut Tree) {
+        tree.children[0].diff(&mut self.content);
+    }
+
+    fn size(&self) -> iced_core::Size<Length> {
+        self.content.as_widget().size()
+    }
+
+    fn layout(
+        &self,
+        tree: &mut Tree,
+        renderer: &Renderer,
+        limits: &layout::Limits,
+    ) -> layout::Node {
+        let node = self
+            .content
+            .as_widget()
+            .layout(&mut tree.children[0], renderer, limits);
+        let size = node.size();
+        layout::Node::with_children(size, vec![node])
+    }
+
+    fn operate(
+        &self,
+        tree: &mut Tree,
+        layout: Layout<'_>,
+        renderer: &Renderer,
+        operation: &mut dyn iced_core::widget::Operation<
+            iced_core::widget::OperationOutputWrapper<Message>,
+        >,
+    ) {
+        self.content.as_widget().operate(
+            &mut tree.children[0],
+            layout.children().next().unwrap(),
+            renderer,
+            operation,
+        );
+    }
+
+    fn on_event(
+        &mut self,
+        tree: &mut Tree,
+        event: Event,
+        layout: Layout<'_>,
+        cursor_position: mouse::Cursor,
+        renderer: &Renderer,
+        clipboard: &mut dyn Clipboard,
+        shell: &mut Shell<'_, Message>,
+        viewport: &Rectangle,
+    ) -> event::Status {
+        self.content.as_widget_mut().on_event(
+            &mut tree.children[0],
+            event.clone(),
+            layout.children().next().unwrap(),
+            cursor_position,
+            renderer,
+            clipboard,
+            shell,
+            viewport,
+        )
+    }
+
+    fn mouse_interaction(
+        &self,
+        tree: &Tree,
+        layout: Layout<'_>,
+        cursor_position: mouse::Cursor,
+        viewport: &Rectangle,
+        renderer: &Renderer,
+    ) -> mouse::Interaction {
+        let content_layout = layout.children().next().unwrap();
+        self.content.as_widget().mouse_interaction(
+            &tree.children[0],
+            content_layout,
+            cursor_position,
+            viewport,
+            renderer,
+        )
+    }
+
+    fn draw(
+        &self,
+        tree: &Tree,
+        renderer: &mut Renderer,
+        theme: &Theme,
+        renderer_style: &renderer::Style,
+        layout: Layout<'_>,
+        cursor_position: mouse::Cursor,
+        viewport: &Rectangle,
+    ) {
+        let content_layout = layout.children().next().unwrap();
+        self.content.as_widget().draw(
+            &tree.children[0],
+            renderer,
+            theme,
+            renderer_style,
+            content_layout,
+            cursor_position,
+            viewport,
+        );
+    }
+
+    fn overlay<'b>(
+        &'b mut self,
+        tree: &'b mut Tree,
+        layout: Layout<'_>,
+        renderer: &Renderer,
+    ) -> Option<overlay::Element<'b, Message, Theme, Renderer>> {
+        self.content.as_widget_mut().overlay(
+            &mut tree.children[0],
+            layout.children().next().unwrap(),
+            renderer,
+        )
+    }
+
+    fn drag_destinations(
+        &self,
+        state: &Tree,
+        layout: Layout<'_>,
+        dnd_rectangles: &mut iced_style::core::clipboard::DndDestinationRectangles,
+    ) {
+        let content_layout = layout.children().next().unwrap();
+        self.content.as_widget().drag_destinations(
+            &state.children[0],
+            content_layout,
+            dnd_rectangles,
+        );
+    }
+
+    fn id(&self) -> Option<crate::widget::Id> {
+        Some(self.id.clone())
+    }
+
+    fn set_id(&mut self, id: crate::widget::Id) {
+        self.id = id;
+    }
+}
+
+impl<'a, Message, Theme, Renderer> From<IdContainer<'a, Message, Theme, Renderer>>
+    for Element<'a, Message, Theme, Renderer>
+where
+    Message: 'a,
+    Renderer: 'a + iced_core::Renderer,
+    Theme: 'a,
+{
+    fn from(c: IdContainer<'a, Message, Theme, Renderer>) -> Element<'a, Message, Theme, Renderer> {
+        Element::new(c)
+    }
+}

src/widget/mod.rs

@@ -234,6 +234,10 @@ pub mod icon;
 #[doc(inline)]
 pub use icon::{icon, Icon};
 
+pub mod id_container;
+#[doc(inline)]
+pub use id_container::{id_container, IdContainer};
+
 #[cfg(feature = "animated-image")]
 pub mod frames;