chore: extract `iced_drop` into separate repo (`pml68/iced_drop`)

4 files changed, 0 insertions, 656 deletions

diff --git a/crates/iced_drop/src/widget.rs b/crates/iced_drop/src/widget.rs
deleted file mode 100644
index 6b3fed2..0000000
--- a/crates/iced_drop/src/widget.rs
+++ /dev/null
@@ -1,2 +0,0 @@
-pub mod droppable;
-pub mod operation;
diff --git a/crates/iced_drop/src/widget/droppable.rs b/crates/iced_drop/src/widget/droppable.rs
deleted file mode 100644
index 0e93bd0..0000000
--- a/crates/iced_drop/src/widget/droppable.rs
+++ /dev/null
@@ -1,565 +0,0 @@
-//! Encapsulates a widget that can be dragged and dropped.
-use std::fmt::Debug;
-use std::vec;
-
-use iced::advanced::widget::{Operation, Tree, Widget};
-use iced::advanced::{self, Layout, layout, mouse, overlay, renderer};
-use iced::{Element, Point, Rectangle, Size, Vector};
-
-/// An element that can be dragged and dropped on a [`DropZone`]
-pub struct Droppable<
-    'a,
-    Message,
-    Theme = iced::Theme,
-    Renderer = iced::Renderer,
-> where
-    Message: Clone,
-    Renderer: renderer::Renderer,
-{
-    content: Element<'a, Message, Theme, Renderer>,
-    id: Option<iced::advanced::widget::Id>,
-    on_click: Option<Message>,
-    on_drop: Option<Box<dyn Fn(Point, Rectangle) -> Message + 'a>>,
-    on_drag: Option<Box<dyn Fn(Point, Rectangle) -> Message + 'a>>,
-    on_cancel: Option<Message>,
-    drag_mode: Option<(bool, bool)>,
-    drag_overlay: bool,
-    drag_hide: bool,
-    drag_center: bool,
-    drag_size: Option<Size>,
-    reset_delay: usize,
-    status: Option<Status>,
-}
-
-impl<'a, Message, Theme, Renderer> Droppable<'a, Message, Theme, Renderer>
-where
-    Message: Clone,
-    Renderer: renderer::Renderer,
-{
-    /// Creates a new [`Droppable`].
-    pub fn new(
-        content: impl Into<Element<'a, Message, Theme, Renderer>>,
-    ) -> Self {
-        Self {
-            content: content.into(),
-            id: None,
-            on_click: None,
-            on_drop: None,
-            on_drag: None,
-            on_cancel: None,
-            drag_mode: Some((true, true)),
-            drag_overlay: true,
-            drag_hide: false,
-            drag_center: false,
-            drag_size: None,
-            reset_delay: 0,
-            status: None,
-        }
-    }
-
-    /// Sets the unique identifier of the [`Droppable`].
-    pub fn id(mut self, id: iced::advanced::widget::Id) -> Self {
-        self.id = Some(id);
-        self
-    }
-
-    /// Sets the message that will be produced when the [`Droppable`] is clicked.
-    pub fn on_click(mut self, message: Message) -> Self {
-        self.on_click = Some(message);
-        self
-    }
-
-    /// Sets the message that will be produced when the [`Droppable`] is dropped on a [`DropZone`].
-    ///
-    /// Unless this is set, the [`Droppable`] will be disabled.
-    pub fn on_drop<F>(mut self, message: F) -> Self
-    where
-        F: Fn(Point, Rectangle) -> Message + 'a,
-    {
-        self.on_drop = Some(Box::new(message));
-        self
-    }
-
-    /// Sets the message that will be produced when the [`Droppable`] is dragged.
-    pub fn on_drag<F>(mut self, message: F) -> Self
-    where
-        F: Fn(Point, Rectangle) -> Message + 'a,
-    {
-        self.on_drag = Some(Box::new(message));
-        self
-    }
-
-    /// Sets the message that will be produced when the user right clicks while dragging the [`Droppable`].
-    pub fn on_cancel(mut self, message: Message) -> Self {
-        self.on_cancel = Some(message);
-        self
-    }
-
-    /// Sets whether the [`Droppable`] should be drawn under the cursor while dragging.
-    pub fn drag_overlay(mut self, drag_overlay: bool) -> Self {
-        self.drag_overlay = drag_overlay;
-        self
-    }
-
-    /// Sets whether the [`Droppable`] should be hidden while dragging.
-    pub fn drag_hide(mut self, drag_hide: bool) -> Self {
-        self.drag_hide = drag_hide;
-        self
-    }
-
-    /// Sets whether the [`Droppable`] should be centered on the cursor while dragging.
-    pub fn drag_center(mut self, drag_center: bool) -> Self {
-        self.drag_center = drag_center;
-        self
-    }
-
-    // Sets whether the [`Droppable`] can be dragged along individual axes.
-    pub fn drag_mode(mut self, drag_x: bool, drag_y: bool) -> Self {
-        self.drag_mode = Some((drag_x, drag_y));
-        self
-    }
-
-    /// Sets whether the [`Droppable`] should be be resized to a given size while dragging.
-    pub fn drag_size(mut self, hide_size: Size) -> Self {
-        self.drag_size = Some(hide_size);
-        self
-    }
-
-    /// Sets the number of frames/layout calls to wait before resetting the size of the [`Droppable`] after dropping.
-    ///
-    /// This is useful for cases where the [`Droppable`] is being moved to a new location after some widget operation.
-    /// In this case, the [`Droppable`] will mainting the 'drag_size' for the given number of frames before resetting to its original size.
-    /// This prevents the [`Droppable`] from 'jumping' back to its original size before the new location is rendered which
-    /// prevents flickering.
-    ///
-    /// Warning: this should only be set if there's is some noticeble flickering when the [`Droppable`] is dropped. That is, if the
-    /// [`Droppable`] returns to its original size before it's moved to it's new location.
-    pub fn reset_delay(mut self, reset_delay: usize) -> Self {
-        self.reset_delay = reset_delay;
-        self
-    }
-}
-
-impl<'a, Message, Theme, Renderer> Widget<Message, Theme, Renderer>
-    for Droppable<'a, Message, Theme, Renderer>
-where
-    Message: Clone,
-    Renderer: renderer::Renderer,
-{
-    fn state(&self) -> iced::advanced::widget::tree::State {
-        advanced::widget::tree::State::new(State::default())
-    }
-
-    fn tag(&self) -> iced::advanced::widget::tree::Tag {
-        advanced::widget::tree::Tag::of::<State>()
-    }
-
-    fn children(&self) -> Vec<iced::advanced::widget::Tree> {
-        vec![advanced::widget::Tree::new(&self.content)]
-    }
-
-    fn diff(&self, tree: &mut iced::advanced::widget::Tree) {
-        tree.diff_children(std::slice::from_ref(&self.content))
-    }
-
-    fn size(&self) -> iced::Size<iced::Length> {
-        self.content.as_widget().size()
-    }
-
-    fn update(
-        &mut self,
-        tree: &mut iced::advanced::widget::Tree,
-        event: &iced::Event,
-        layout: iced::advanced::Layout<'_>,
-        cursor: iced::advanced::mouse::Cursor,
-        _renderer: &Renderer,
-        _clipboard: &mut dyn iced::advanced::Clipboard,
-        shell: &mut iced::advanced::Shell<'_, Message>,
-        _viewport: &iced::Rectangle,
-    ) {
-        // handle the on event of the content first, in case that the droppable is nested
-        self.content.as_widget_mut().update(
-            &mut tree.children[0],
-            event,
-            layout,
-            cursor,
-            _renderer,
-            _clipboard,
-            shell,
-            _viewport,
-        );
-        // this should really only be captured if the droppable is nested or it contains some other
-        // widget that captures the event
-        if shell.is_event_captured() {
-            return;
-        }
-
-        if let Some(on_drop) = self.on_drop.as_deref() {
-            let state = tree.state.downcast_mut::<State>();
-            if let iced::Event::Mouse(mouse) = event {
-                match mouse {
-                    mouse::Event::ButtonPressed(btn) => {
-                        if *btn == mouse::Button::Left
-                            && cursor.is_over(layout.bounds())
-                        {
-                            // select the droppable and store the position of the widget before dragging
-                            state.action =
-                                Action::Select(cursor.position().unwrap());
-                            let bounds = layout.bounds();
-                            state.widget_pos = bounds.position();
-                            state.overlay_bounds.width = bounds.width;
-                            state.overlay_bounds.height = bounds.height;
-
-                            if let Some(on_click) = self.on_click.clone() {
-                                shell.publish(on_click);
-                            }
-                            shell.capture_event();
-                        } else if *btn == mouse::Button::Right {
-                            if let Action::Drag(_, _) = state.action {
-                                shell.invalidate_layout();
-                                state.action = Action::None;
-                                if let Some(on_cancel) = self.on_cancel.clone()
-                                {
-                                    shell.publish(on_cancel);
-                                }
-                            }
-                        }
-                    }
-                    &mouse::Event::CursorMoved { mut position } => match state
-                        .action
-                    {
-                        Action::Select(start) | Action::Drag(start, _) => {
-                            // calculate the new position of the widget after dragging
-
-                            if let Some((drag_x, drag_y)) = self.drag_mode {
-                                position = Point {
-                                    x: if drag_x {
-                                        position.x
-                                    } else {
-                                        start.x
-                                    },
-                                    y: if drag_y {
-                                        position.y
-                                    } else {
-                                        start.y
-                                    },
-                                };
-                            }
-
-                            state.action = Action::Drag(start, position);
-                            // update the position of the overlay since the cursor was moved
-                            if self.drag_center {
-                                state.overlay_bounds.x = position.x
-                                    - state.overlay_bounds.width / 2.0;
-                                state.overlay_bounds.y = position.y
-                                    - state.overlay_bounds.height / 2.0;
-                            } else {
-                                state.overlay_bounds.x =
-                                    state.widget_pos.x + position.x - start.x;
-                                state.overlay_bounds.y =
-                                    state.widget_pos.y + position.y - start.y;
-                            }
-                            // send on drag msg
-                            if let Some(on_drag) = self.on_drag.as_deref() {
-                                let message =
-                                    (on_drag)(position, state.overlay_bounds);
-                                shell.publish(message);
-                            }
-
-                            shell.request_redraw();
-                        }
-                        _ => (),
-                    },
-                    mouse::Event::ButtonReleased(mouse::Button::Left) => {
-                        match state.action {
-                            Action::Select(_) => {
-                                state.action = Action::None;
-                            }
-                            Action::Drag(_, current) => {
-                                // send on drop msg
-                                let message =
-                                    (on_drop)(current, state.overlay_bounds);
-                                shell.publish(message);
-
-                                if self.reset_delay == 0 {
-                                    state.action = Action::None;
-                                } else {
-                                    state.action =
-                                        Action::Wait(self.reset_delay);
-                                }
-                            }
-                            _ => (),
-                        }
-                    }
-                    _ => {}
-                }
-            }
-        }
-
-        let current_status = if cursor.is_over(layout.bounds()) {
-            if self.on_drop.is_none() {
-                Status::Disabled
-            } else {
-                let state = tree.state.downcast_ref::<State>();
-
-                if let Action::Drag(_, _) = state.action {
-                    Status::Dragged
-                } else {
-                    Status::Hovered
-                }
-            }
-        } else {
-            Status::Active
-        };
-
-        if let iced::Event::Window(iced::window::Event::RedrawRequested(_now)) =
-            event
-        {
-            self.status = Some(current_status);
-        } else if self.status.is_some_and(|status| status != current_status) {
-            shell.request_redraw();
-        }
-    }
-
-    fn layout(
-        &self,
-        tree: &mut iced::advanced::widget::Tree,
-        renderer: &Renderer,
-        limits: &iced::advanced::layout::Limits,
-    ) -> iced::advanced::layout::Node {
-        let state: &mut State = tree.state.downcast_mut::<State>();
-        let content_node = self.content.as_widget().layout(
-            &mut tree.children[0],
-            renderer,
-            limits,
-        );
-
-        // Adjust the size of the original widget if it's being dragged or we're wating to reset the size
-        if let Some(new_size) = self.drag_size {
-            match state.action {
-                Action::Drag(_, _) => {
-                    return iced::advanced::layout::Node::with_children(
-                        new_size,
-                        content_node.children().to_vec(),
-                    );
-                }
-                Action::Wait(reveal_index) => {
-                    if reveal_index <= 1 {
-                        state.action = Action::None;
-                    } else {
-                        state.action = Action::Wait(reveal_index - 1);
-                    }
-
-                    return iced::advanced::layout::Node::with_children(
-                        new_size,
-                        content_node.children().to_vec(),
-                    );
-                }
-                _ => (),
-            }
-        }
-
-        content_node
-    }
-
-    fn operate(
-        &self,
-        tree: &mut Tree,
-        layout: Layout<'_>,
-        renderer: &Renderer,
-        operation: &mut dyn Operation,
-    ) {
-        let state = tree.state.downcast_mut::<State>();
-        operation.custom(self.id.as_ref(), layout.bounds(), state);
-        operation.container(
-            self.id.as_ref(),
-            layout.bounds(),
-            &mut |operation| {
-                self.content.as_widget().operate(
-                    &mut tree.children[0],
-                    layout,
-                    renderer,
-                    operation,
-                );
-            },
-        );
-    }
-
-    fn draw(
-        &self,
-        tree: &iced::advanced::widget::Tree,
-        renderer: &mut Renderer,
-        theme: &Theme,
-        style: &renderer::Style,
-        layout: iced::advanced::Layout<'_>,
-        cursor: iced::advanced::mouse::Cursor,
-        viewport: &iced::Rectangle,
-    ) {
-        let state: &State = tree.state.downcast_ref::<State>();
-        if let Action::Drag(_, _) = state.action {
-            if self.drag_hide {
-                return;
-            }
-        }
-
-        self.content.as_widget().draw(
-            &tree.children[0],
-            renderer,
-            theme,
-            style,
-            layout,
-            cursor,
-            &viewport,
-        );
-    }
-
-    fn overlay<'b>(
-        &'b mut self,
-        tree: &'b mut Tree,
-        layout: Layout<'b>,
-        renderer: &Renderer,
-        _viewport: &iced::Rectangle,
-        _translation: Vector,
-    ) -> Option<overlay::Element<'b, Message, Theme, Renderer>> {
-        let state: &mut State = tree.state.downcast_mut::<State>();
-        if self.drag_overlay {
-            if let Action::Drag(_, _) = state.action {
-                return Some(overlay::Element::new(Box::new(Overlay {
-                    content: &self.content,
-                    tree: &mut tree.children[0],
-                    overlay_bounds: state.overlay_bounds,
-                })));
-            }
-        }
-        self.content.as_widget_mut().overlay(
-            &mut tree.children[0],
-            layout,
-            renderer,
-            _viewport,
-            _translation,
-        )
-    }
-
-    fn mouse_interaction(
-        &self,
-        tree: &iced::advanced::widget::Tree,
-        layout: iced::advanced::Layout<'_>,
-        cursor: iced::advanced::mouse::Cursor,
-        _viewport: &iced::Rectangle,
-        _renderer: &Renderer,
-    ) -> iced::advanced::mouse::Interaction {
-        let child_interact = self.content.as_widget().mouse_interaction(
-            &tree.children[0],
-            layout,
-            cursor,
-            _viewport,
-            _renderer,
-        );
-
-        if child_interact != mouse::Interaction::default() {
-            return child_interact;
-        }
-
-        let state = tree.state.downcast_ref::<State>();
-
-        if cursor.is_over(layout.bounds()) {
-            if self.on_drop.is_none() {
-                mouse::Interaction::NotAllowed
-            } else if let Action::Drag(_, _) = state.action {
-                mouse::Interaction::Grabbing
-            } else {
-                mouse::Interaction::Pointer
-            }
-        } else {
-            mouse::Interaction::default()
-        }
-    }
-}
-
-impl<'a, Message, Theme, Renderer> From<Droppable<'a, Message, Theme, Renderer>>
-    for Element<'a, Message, Theme, Renderer>
-where
-    Message: 'a + Clone,
-    Theme: 'a,
-    Renderer: 'a + renderer::Renderer,
-{
-    fn from(
-        droppable: Droppable<'a, Message, Theme, Renderer>,
-    ) -> Element<'a, Message, Theme, Renderer> {
-        Element::new(droppable)
-    }
-}
-
-#[derive(Default, Clone, Copy, PartialEq, Debug)]
-pub struct State {
-    widget_pos: Point,
-    overlay_bounds: Rectangle,
-    action: Action,
-}
-
-#[derive(Default, Clone, Copy, PartialEq, Debug)]
-pub enum Status {
-    #[default]
-    Active,
-    Hovered,
-    Dragged,
-    Disabled,
-}
-
-#[derive(Default, Clone, Copy, PartialEq, Debug)]
-pub enum Action {
-    #[default]
-    None,
-    /// (point clicked)
-    Select(Point),
-    /// (start pos, current pos)
-    Drag(Point, Point),
-    /// (frames to wait)
-    Wait(usize),
-}
-
-struct Overlay<'a, 'b, Message, Theme, Renderer>
-where
-    Renderer: renderer::Renderer,
-{
-    content: &'b Element<'a, Message, Theme, Renderer>,
-    tree: &'b mut advanced::widget::Tree,
-    overlay_bounds: Rectangle,
-}
-
-impl<'a, 'b, Message, Theme, Renderer>
-    overlay::Overlay<Message, Theme, Renderer>
-    for Overlay<'a, 'b, Message, Theme, Renderer>
-where
-    Renderer: renderer::Renderer,
-{
-    fn layout(&mut self, renderer: &Renderer, _bounds: Size) -> layout::Node {
-        Widget::<Message, Theme, Renderer>::layout(
-            self.content.as_widget(),
-            self.tree,
-            renderer,
-            &layout::Limits::new(Size::ZERO, self.overlay_bounds.size()),
-        )
-        .move_to(self.overlay_bounds.position())
-    }
-
-    fn draw(
-        &self,
-        renderer: &mut Renderer,
-        theme: &Theme,
-        inherited_style: &renderer::Style,
-        layout: Layout<'_>,
-        cursor_position: mouse::Cursor,
-    ) {
-        Widget::<Message, Theme, Renderer>::draw(
-            self.content.as_widget(),
-            self.tree,
-            renderer,
-            theme,
-            inherited_style,
-            layout,
-            cursor_position,
-            &Rectangle::with_size(Size::INFINITY),
-        );
-    }
-}
diff --git a/crates/iced_drop/src/widget/operation.rs b/crates/iced_drop/src/widget/operation.rs
deleted file mode 100644
index 3d7dcff..0000000
--- a/crates/iced_drop/src/widget/operation.rs
+++ /dev/null
@@ -1 +0,0 @@
-pub mod drop;
diff --git a/crates/iced_drop/src/widget/operation/drop.rs b/crates/iced_drop/src/widget/operation/drop.rs
deleted file mode 100644
index ead412c..0000000
--- a/crates/iced_drop/src/widget/operation/drop.rs
+++ /dev/null
@@ -1,88 +0,0 @@
-use iced::advanced::widget::operation::{Outcome, Scrollable};
-use iced::advanced::widget::{Id, Operation};
-use iced::{Rectangle, Vector};
-
-/// Produces an [`Operation`] that will find the drop zones that pass a filter on the zone's bounds.
-/// For any drop zone to be considered, the Element must have some Id.
-/// If `options` is `None`, all drop zones will be considered.
-/// Depth determines how how deep into nested drop zones to go.
-/// If 'depth' is `None`, nested dropzones will be fully explored
-pub fn find_zones<F>(
-    filter: F,
-    options: Option<Vec<Id>>,
-    depth: Option<usize>,
-) -> impl Operation<Vec<(Id, Rectangle)>>
-where
-    F: Fn(&Rectangle) -> bool + Send + 'static,
-{
-    struct FindDropZone<F> {
-        filter: F,
-        options: Option<Vec<Id>>,
-        zones: Vec<(Id, Rectangle)>,
-        max_depth: Option<usize>,
-        c_depth: usize,
-        offset: Vector,
-    }
-
-    impl<F> Operation<Vec<(Id, Rectangle)>> for FindDropZone<F>
-    where
-        F: Fn(&Rectangle) -> bool + Send + 'static,
-    {
-        fn container(
-            &mut self,
-            id: Option<&Id>,
-            bounds: iced::Rectangle,
-            operate_on_children: &mut dyn FnMut(
-                &mut dyn Operation<Vec<(Id, Rectangle)>>,
-            ),
-        ) {
-            match id {
-                Some(id) => {
-                    let is_option = match &self.options {
-                        Some(options) => options.contains(id),
-                        None => true,
-                    };
-                    let bounds = bounds - self.offset;
-                    if is_option && (self.filter)(&bounds) {
-                        self.c_depth += 1;
-                        self.zones.push((id.clone(), bounds));
-                    }
-                }
-                None => (),
-            }
-            let goto_next = match &self.max_depth {
-                Some(m_depth) => self.c_depth < *m_depth,
-                None => true,
-            };
-            if goto_next {
-                operate_on_children(self);
-            }
-        }
-
-        fn finish(&self) -> Outcome<Vec<(Id, Rectangle)>> {
-            Outcome::Some(self.zones.clone())
-        }
-
-        fn scrollable(
-            &mut self,
-            _id: Option<&Id>,
-            bounds: Rectangle,
-            _content_bounds: Rectangle,
-            translation: Vector,
-            _state: &mut dyn Scrollable,
-        ) {
-            if (self.filter)(&bounds) {
-                self.offset = self.offset + translation;
-            }
-        }
-    }
-
-    FindDropZone {
-        filter,
-        options,
-        zones: vec![],
-        max_depth: depth,
-        c_depth: 0,
-        offset: Vector { x: 0.0, y: 0.0 },
-    }
-}