ferroui-base 0.4.0

// @generated by scripts/generate_composition.py — do not edit

//! `DropShadow`.
//!
//! Defined by the FerroUI overlay (scripts/composition-schema-winui.xml).

use bitflags::bitflags;
use crate::Vector3D;
use crate::media::Color;
use crate::rendering::composition::CompositionDropShadowSourcePolicy;
use crate::rendering::composition::ICompositionObject;
use crate::rendering::composition::ICompositionObjectHost;
use crate::rendering::composition::animations::AnimationInstanceFactory;
use crate::rendering::composition::animations::ICompositionAnimation;
use crate::rendering::composition::expressions::ExpressionVariant;
use crate::rendering::composition::server::AsServerRenderResource;
use crate::rendering::composition::server::CompositionProperty;
use crate::rendering::composition::server::CompositionPropertyOf;
use crate::rendering::composition::server::IServerAnimatedPropertyHost;
use crate::rendering::composition::server::IServerObject;
use crate::rendering::composition::server::ServerPropertyValue;
use crate::rendering::composition::server::ServerValueChange;
use crate::rendering::composition::server::props_of;
use crate::rendering::composition::server::read_server_object;
use crate::rendering::composition::transport::BatchStreamReader;
use crate::rendering::composition::transport::BatchStreamWriter;
use crate::rendering::composition::transport::BatchValue;
use crate::rendering::composition::transport::BatchValueReader;
use std::any::Any;
use std::any::TypeId;
use std::cell::Cell;
use std::cell::RefCell;
use std::rc::Rc;
use std::sync::OnceLock;
use std::time::Duration;

bitflags! {
    /// The fields of `DropShadow` that changed since its last serialization.
    #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Hash)]
    pub struct DropShadowChangedFields: u16 {
        const BLUR_RADIUS = 1;
        const BLUR_RADIUS_ANIMATED = 2;
        const COLOR = 4;
        const COLOR_ANIMATED = 8;
        const MASK = 16;
        const OFFSET = 32;
        const OFFSET_ANIMATED = 64;
        const OPACITY = 128;
        const OPACITY_ANIMATED = 256;
        const SOURCE_POLICY = 512;
    }
}

impl BatchValue for DropShadowChangedFields {
    #[inline]
    fn write_to(&self, out: &mut Vec<u8>) {
        self.bits().write_to(out);
    }

    #[inline]
    fn read_from(input: &mut BatchValueReader<'_>) -> Self {
        DropShadowChangedFields::from_bits_retain(u16::read_from(input))
    }
}

/// The partial methods of `DropShadow`: implemented by the class that embeds
/// [`DropShadowProps`]. Every hook defaults to doing nothing.
pub trait DropShadowHooks: ICompositionObjectHost {
    fn initialize_defaults_extra(&self) {}

    fn validate_blur_radius_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_blur_radius_changed(&self) {}
    fn on_blur_radius_changing(&self) {}

    fn validate_color_change(&self, _old_value: Color, _new_value: Color) {}
    fn on_color_changed(&self) {}
    fn on_color_changing(&self) {}

    fn validate_mask_change(&self, _old_value: &Option<Rc<dyn ICompositionObject>>, _new_value: &Option<Rc<dyn ICompositionObject>>) {}
    fn on_mask_changed(&self) {}
    fn on_mask_changing(&self) {}

    fn validate_offset_change(&self, _old_value: Vector3D, _new_value: Vector3D) {}
    fn on_offset_changed(&self) {}
    fn on_offset_changing(&self) {}

    fn validate_opacity_change(&self, _old_value: f32, _new_value: f32) {}
    fn on_opacity_changed(&self) {}
    fn on_opacity_changing(&self) {}

    fn validate_source_policy_change(&self, _old_value: CompositionDropShadowSourcePolicy, _new_value: CompositionDropShadowSourcePolicy) {}
    fn on_source_policy_changed(&self) {}
    fn on_source_policy_changing(&self) {}
}

/// The UI-thread properties of `DropShadow`.
pub struct DropShadowProps {
    changed_fields_of_drop_shadow: Cell<DropShadowChangedFields>,
    blur_radius: Cell<f32>,
    color: Cell<Color>,
    mask: RefCell<Option<Rc<dyn ICompositionObject>>>,
    offset: Cell<Vector3D>,
    opacity: Cell<f32>,
    source_policy: Cell<CompositionDropShadowSourcePolicy>,
}

impl Default for DropShadowProps {
    fn default() -> Self {
        Self::new()
    }
}

impl DropShadowProps {
    /// Creates the properties with every field at the default of its type.
    /// The defaults of the schema are applied by
    /// [`initialize_defaults`](Self::initialize_defaults).
    pub fn new() -> Self {
        Self {
            changed_fields_of_drop_shadow: Cell::new(DropShadowChangedFields::empty()),
            blur_radius: Cell::new(Default::default()),
            color: Cell::new(Default::default()),
            mask: RefCell::new(None),
            offset: Cell::new(Default::default()),
            opacity: Cell::new(Default::default()),
            source_policy: Cell::new(Default::default()),
        }
    }

    /// The `InitializeDefaults` calls of the constructor chain: the base
    /// classes first, then this class.
    pub fn initialize_defaults(&self, host: &dyn DropShadowHooks) {
        self.initialize_own_defaults(host);
    }

    /// `InitializeDefaults` of this class alone.
    pub fn initialize_own_defaults(&self, host: &dyn DropShadowHooks) {
        DropShadowHooks::initialize_defaults_extra(host);
        self.set_blur_radius(host, 9.0);
        self.set_color(host, crate::media::Colors::BLACK);
        self.set_opacity(host, 1.0);
    }

    /// `BlurRadius` (animated, default `9.0`, FerroUI overlay).
    pub fn blur_radius(&self) -> f32 {
        self.blur_radius.get()
    }

    /// Sets `BlurRadius` (animated, default `9.0`, FerroUI overlay).
    pub fn set_blur_radius(&self, host: &dyn DropShadowHooks, value: f32) {
        let mut changed = false;
        let old_value = self.blur_radius.get();
        if old_value.differs(&value) {
            DropShadowHooks::validate_blur_radius_change(host, old_value, value);
            DropShadowHooks::on_blur_radius_changing(host);
            changed = true;
            // Update the backing value
            self.blur_radius.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::BLUR_RADIUS);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerDropShadowProps::id_of_blur_radius_property().base());
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() & !DropShadowChangedFields::BLUR_RADIUS_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("BlurRadius") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::BLUR_RADIUS_ANIMATED);
                    host.pending_animations().set(
                        ServerDropShadowProps::id_of_blur_radius_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "BlurRadius", ExpressionVariant::create(value));
            }
        }
        self.blur_radius.set(value);
        if changed {
            DropShadowHooks::on_blur_radius_changed(host);
        }
    }

    /// `Color` (animated, default `crate::media::Colors::BLACK`, FerroUI overlay).
    pub fn color(&self) -> Color {
        self.color.get()
    }

    /// Sets `Color` (animated, default `crate::media::Colors::BLACK`, FerroUI overlay).
    pub fn set_color(&self, host: &dyn DropShadowHooks, value: Color) {
        let mut changed = false;
        let old_value = self.color.get();
        if old_value.differs(&value) {
            DropShadowHooks::validate_color_change(host, old_value, value);
            DropShadowHooks::on_color_changing(host);
            changed = true;
            // Update the backing value
            self.color.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::COLOR);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerDropShadowProps::id_of_color_property().base());
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() & !DropShadowChangedFields::COLOR_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("Color") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::COLOR_ANIMATED);
                    host.pending_animations().set(
                        ServerDropShadowProps::id_of_color_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "Color", ExpressionVariant::create(value));
            }
        }
        self.color.set(value);
        if changed {
            DropShadowHooks::on_color_changed(host);
        }
    }

    /// `Mask` (FerroUI overlay).
    pub fn mask(&self) -> Option<Rc<dyn ICompositionObject>> {
        self.mask.borrow().clone()
    }

    /// Sets `Mask` (FerroUI overlay).
    pub fn set_mask(&self, host: &dyn DropShadowHooks, value: Option<Rc<dyn ICompositionObject>>) {
        let mut changed = false;
        let old_value = self.mask.borrow().clone();
        if old_value.differs(&value) {
            DropShadowHooks::validate_mask_change(host, &old_value, &value);
            DropShadowHooks::on_mask_changing(host);
            changed = true;
            // Update the backing value
            *self.mask.borrow_mut() = value.clone();
            // Register object for serialization in the next batch
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::MASK);
            host.register_for_serialization();
        }
        *self.mask.borrow_mut() = value;
        if changed {
            DropShadowHooks::on_mask_changed(host);
        }
    }

    /// `Offset` (animated, FerroUI overlay).
    pub fn offset(&self) -> Vector3D {
        self.offset.get()
    }

    /// Sets `Offset` (animated, FerroUI overlay).
    pub fn set_offset(&self, host: &dyn DropShadowHooks, value: Vector3D) {
        let mut changed = false;
        let old_value = self.offset.get();
        if old_value.differs(&value) {
            DropShadowHooks::validate_offset_change(host, old_value, value);
            DropShadowHooks::on_offset_changing(host);
            changed = true;
            // Update the backing value
            self.offset.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::OFFSET);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerDropShadowProps::id_of_offset_property().base());
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() & !DropShadowChangedFields::OFFSET_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("Offset") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::OFFSET_ANIMATED);
                    host.pending_animations().set(
                        ServerDropShadowProps::id_of_offset_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "Offset", ExpressionVariant::create(value));
            }
        }
        self.offset.set(value);
        if changed {
            DropShadowHooks::on_offset_changed(host);
        }
    }

    /// `Opacity` (animated, default `1.0`, FerroUI overlay).
    pub fn opacity(&self) -> f32 {
        self.opacity.get()
    }

    /// Sets `Opacity` (animated, default `1.0`, FerroUI overlay).
    pub fn set_opacity(&self, host: &dyn DropShadowHooks, value: f32) {
        let mut changed = false;
        let old_value = self.opacity.get();
        if old_value.differs(&value) {
            DropShadowHooks::validate_opacity_change(host, old_value, value);
            DropShadowHooks::on_opacity_changing(host);
            changed = true;
            // Update the backing value
            self.opacity.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::OPACITY);
            host.register_for_serialization();
            // Reset previous animation if any
            host.pending_animations().remove(ServerDropShadowProps::id_of_opacity_property().base());
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() & !DropShadowChangedFields::OPACITY_ANIMATED);
            // Check for implicit animations
            if let Some(animation) = host.implicit_animation("Opacity") {
                // Animation affects only current property
                if let Some(a) = animation.as_composition_animation() {
                    self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::OPACITY_ANIMATED);
                    host.pending_animations().set(
                        ServerDropShadowProps::id_of_opacity_property().base(),
                        a.create_instance(host.server(), Some(ExpressionVariant::create(value))),
                    );
                }
                // Animation is triggered by the current field, but does not necessary affects it
                host.start_animation_group(&animation, "Opacity", ExpressionVariant::create(value));
            }
        }
        self.opacity.set(value);
        if changed {
            DropShadowHooks::on_opacity_changed(host);
        }
    }

    /// `SourcePolicy` (FerroUI overlay).
    pub fn source_policy(&self) -> CompositionDropShadowSourcePolicy {
        self.source_policy.get()
    }

    /// Sets `SourcePolicy` (FerroUI overlay).
    pub fn set_source_policy(&self, host: &dyn DropShadowHooks, value: CompositionDropShadowSourcePolicy) {
        let mut changed = false;
        let old_value = self.source_policy.get();
        if old_value.differs(&value) {
            DropShadowHooks::validate_source_policy_change(host, old_value, value);
            DropShadowHooks::on_source_policy_changing(host);
            changed = true;
            // Update the backing value
            self.source_policy.set(value);
            // Register object for serialization in the next batch
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::SOURCE_POLICY);
            host.register_for_serialization();
        }
        self.source_policy.set(value);
        if changed {
            DropShadowHooks::on_source_policy_changed(host);
        }
    }

    /// Connects an animation with the named property. Returns `false` when
    /// neither this class nor its generated bases have an animated property
    /// of that name: the caller continues with its hand-written base.
    pub fn start_animation(
        &self,
        host: &dyn DropShadowHooks,
        property_name: &str,
        animation: &dyn ICompositionAnimation,
        final_value: Option<ExpressionVariant>,
    ) -> bool {
        if property_name == "BlurRadius" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerDropShadowProps::id_of_blur_radius_property().base(), server);
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::BLUR_RADIUS_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "Color" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerDropShadowProps::id_of_color_property().base(), server);
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::COLOR_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "Offset" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerDropShadowProps::id_of_offset_property().base(), server);
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::OFFSET_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        if property_name == "Opacity" {
            let server = animation.create_instance(host.server(), final_value);
            host.pending_animations().set(ServerDropShadowProps::id_of_opacity_property().base(), server);
            self.changed_fields_of_drop_shadow.set(self.changed_fields_of_drop_shadow.get() | DropShadowChangedFields::OPACITY_ANIMATED);
            host.register_for_serialization();
            return true;
        }
        false
    }

    /// Writes the changes of the object: the base class first, then the
    /// changed-fields mask and the changed members of this class.
    pub fn serialize_changes_core(&self, host: &dyn DropShadowHooks, writer: &mut BatchStreamWriter<'_>) {
        let changed = self.changed_fields_of_drop_shadow.get();
        writer.write(changed);
        if changed.contains(DropShadowChangedFields::BLUR_RADIUS_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerDropShadowProps::id_of_blur_radius_property().base()));
        } else if changed.contains(DropShadowChangedFields::BLUR_RADIUS) {
            writer.write(self.blur_radius.get());
        }
        if changed.contains(DropShadowChangedFields::COLOR_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerDropShadowProps::id_of_color_property().base()));
        } else if changed.contains(DropShadowChangedFields::COLOR) {
            writer.write(self.color.get());
        }
        if changed.contains(DropShadowChangedFields::MASK) {
            writer.write_server_object(self.mask.borrow().clone().map(|o| o.server()));
        }
        if changed.contains(DropShadowChangedFields::OFFSET_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerDropShadowProps::id_of_offset_property().base()));
        } else if changed.contains(DropShadowChangedFields::OFFSET) {
            writer.write(self.offset.get());
        }
        if changed.contains(DropShadowChangedFields::OPACITY_ANIMATED) {
            writer.write_value(host.pending_animations().get_and_remove(ServerDropShadowProps::id_of_opacity_property().base()));
        } else if changed.contains(DropShadowChangedFields::OPACITY) {
            writer.write(self.opacity.get());
        }
        if changed.contains(DropShadowChangedFields::SOURCE_POLICY) {
            writer.write(self.source_policy.get());
        }
        self.changed_fields_of_drop_shadow.set(DropShadowChangedFields::empty());
    }
}

/// The partial methods of `ServerDropShadow`: implemented by the class that embeds
/// [`ServerDropShadowProps`]. Every hook defaults to doing nothing.
pub trait ServerDropShadowHooks: IServerAnimatedPropertyHost {
    fn deserialize_changes_extra(&self, _reader: &mut BatchStreamReader<'_>) {}
    fn on_fields_deserialized(&self, _changed: DropShadowChangedFields) {}

    fn on_mask_changed(&self) {}
    fn on_mask_changing(&self) {}

    fn on_source_policy_changed(&self) {}
    fn on_source_policy_changing(&self) {}
}

/// The server-side properties of `ServerDropShadow`.
pub struct ServerDropShadowProps {
    blur_radius: Cell<f32>,
    color: Cell<Color>,
    mask: RefCell<Option<Rc<dyn IServerObject>>>,
    offset: Cell<Vector3D>,
    opacity: Cell<f32>,
    source_policy: Cell<CompositionDropShadowSourcePolicy>,
}

impl Default for ServerDropShadowProps {
    fn default() -> Self {
        Self::new()
    }
}

impl ServerDropShadowProps {
    /// Creates the properties with every field at the default of its type; the
    /// values of the UI thread arrive with the first batch.
    pub fn new() -> Self {
        Self {
            blur_radius: Cell::new(Default::default()),
            color: Cell::new(Default::default()),
            mask: RefCell::new(None),
            offset: Cell::new(Default::default()),
            opacity: Cell::new(Default::default()),
            source_policy: Cell::new(Default::default()),
        }
    }

    /// This block or the block of a base class, by type: what
    /// `IServerObject::get_props` of the embedding class returns.
    pub fn find_props(&self, type_id: TypeId) -> Option<&dyn Any> {
        if type_id == TypeId::of::<Self>() {
            return Some(self);
        }
        None
    }

    /// The composition property of `BlurRadius`.
    pub fn id_of_blur_radius_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerDropShadowProps, f32>(
                "BlurRadius",
                "ServerDropShadow",
                |obj| props_of::<ServerDropShadowProps>(obj).blur_radius.get(),
                |obj, v| props_of::<ServerDropShadowProps>(obj).blur_radius.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerDropShadowProps>(obj).blur_radius.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerDropShadowProps>(obj).blur_radius.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `BlurRadius` (animated).
    pub fn blur_radius(&self) -> f32 {
        self.blur_radius.get()
    }

    pub fn set_blur_radius(&self, host: &dyn ServerDropShadowHooks, value: f32) {
        self.blur_radius.set(value);
        host.remove_animation_for_property(Self::id_of_blur_radius_property().base());
    }

    /// The composition property of `Color`.
    pub fn id_of_color_property() -> &'static CompositionPropertyOf<Color> {
        static PROPERTY: OnceLock<CompositionPropertyOf<Color>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerDropShadowProps, Color>(
                "Color",
                "ServerDropShadow",
                |obj| props_of::<ServerDropShadowProps>(obj).color.get(),
                |obj, v| props_of::<ServerDropShadowProps>(obj).color.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerDropShadowProps>(obj).color.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerDropShadowProps>(obj).color.set(v.cast_or_default::<Color>())),
            )
        })
    }

    /// `Color` (animated).
    pub fn color(&self) -> Color {
        self.color.get()
    }

    pub fn set_color(&self, host: &dyn ServerDropShadowHooks, value: Color) {
        self.color.set(value);
        host.remove_animation_for_property(Self::id_of_color_property().base());
    }

    /// The composition property of `Mask`.
    pub fn id_of_mask_property() -> &'static CompositionPropertyOf<Option<Rc<dyn IServerObject>>> {
        static PROPERTY: OnceLock<CompositionPropertyOf<Option<Rc<dyn IServerObject>>>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerDropShadowProps, Option<Rc<dyn IServerObject>>>(
                "Mask",
                "ServerDropShadow",
                |obj| props_of::<ServerDropShadowProps>(obj).mask.borrow().clone(),
                |obj, v| *props_of::<ServerDropShadowProps>(obj).mask.borrow_mut() = v,
                None,
                None,
            )
        })
    }

    /// `Mask`.
    pub fn mask(&self) -> Option<Rc<dyn IServerObject>> {
        self.mask.borrow().clone()
    }

    pub fn set_mask(&self, host: &dyn ServerDropShadowHooks, value: Option<Rc<dyn IServerObject>>) {
        let old_value = self.mask.borrow().clone();
        let mut changed = false;
        if old_value.differs(&value) {
            ServerDropShadowHooks::on_mask_changing(host);
            changed = true;
        }
        host.set_value(
            Self::id_of_mask_property().base(),
            ServerValueChange {
                equal: old_value.default_equals(&value),
                old_resource: old_value.as_server_render_resource(),
                new_resource: value.as_server_render_resource(),
                assign: &mut || *self.mask.borrow_mut() = value.clone(),
            },
        );
        if changed {
            ServerDropShadowHooks::on_mask_changed(host);
        }
    }

    /// The composition property of `Offset`.
    pub fn id_of_offset_property() -> &'static CompositionPropertyOf<Vector3D> {
        static PROPERTY: OnceLock<CompositionPropertyOf<Vector3D>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerDropShadowProps, Vector3D>(
                "Offset",
                "ServerDropShadow",
                |obj| props_of::<ServerDropShadowProps>(obj).offset.get(),
                |obj, v| props_of::<ServerDropShadowProps>(obj).offset.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerDropShadowProps>(obj).offset.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerDropShadowProps>(obj).offset.set(v.cast_or_default::<Vector3D>())),
            )
        })
    }

    /// `Offset` (animated).
    pub fn offset(&self) -> Vector3D {
        self.offset.get()
    }

    pub fn set_offset(&self, host: &dyn ServerDropShadowHooks, value: Vector3D) {
        self.offset.set(value);
        host.remove_animation_for_property(Self::id_of_offset_property().base());
    }

    /// The composition property of `Opacity`.
    pub fn id_of_opacity_property() -> &'static CompositionPropertyOf<f32> {
        static PROPERTY: OnceLock<CompositionPropertyOf<f32>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerDropShadowProps, f32>(
                "Opacity",
                "ServerDropShadow",
                |obj| props_of::<ServerDropShadowProps>(obj).opacity.get(),
                |obj, v| props_of::<ServerDropShadowProps>(obj).opacity.set(v),
                Some(|obj| ExpressionVariant::create(props_of::<ServerDropShadowProps>(obj).opacity.get())),
                Some(|obj, v: ExpressionVariant| props_of::<ServerDropShadowProps>(obj).opacity.set(v.cast_or_default::<f32>())),
            )
        })
    }

    /// `Opacity` (animated).
    pub fn opacity(&self) -> f32 {
        self.opacity.get()
    }

    pub fn set_opacity(&self, host: &dyn ServerDropShadowHooks, value: f32) {
        self.opacity.set(value);
        host.remove_animation_for_property(Self::id_of_opacity_property().base());
    }

    /// The composition property of `SourcePolicy`.
    pub fn id_of_source_policy_property() -> &'static CompositionPropertyOf<CompositionDropShadowSourcePolicy> {
        static PROPERTY: OnceLock<CompositionPropertyOf<CompositionDropShadowSourcePolicy>> = OnceLock::new();
        PROPERTY.get_or_init(|| {
            CompositionProperty::register::<ServerDropShadowProps, CompositionDropShadowSourcePolicy>(
                "SourcePolicy",
                "ServerDropShadow",
                |obj| props_of::<ServerDropShadowProps>(obj).source_policy.get(),
                |obj, v| props_of::<ServerDropShadowProps>(obj).source_policy.set(v),
                None,
                None,
            )
        })
    }

    /// `SourcePolicy`.
    pub fn source_policy(&self) -> CompositionDropShadowSourcePolicy {
        self.source_policy.get()
    }

    pub fn set_source_policy(&self, host: &dyn ServerDropShadowHooks, value: CompositionDropShadowSourcePolicy) {
        let old_value = self.source_policy.get();
        let mut changed = false;
        if old_value.differs(&value) {
            ServerDropShadowHooks::on_source_policy_changing(host);
            changed = true;
        }
        host.set_value(
            Self::id_of_source_policy_property().base(),
            ServerValueChange {
                equal: old_value.default_equals(&value),
                old_resource: None,
                new_resource: None,
                assign: &mut || self.source_policy.set(value),
            },
        );
        if changed {
            ServerDropShadowHooks::on_source_policy_changed(host);
        }
    }

    /// Reads the changes of the object: the base class first, then the
    /// changed-fields mask and the changed members of this class.
    pub fn deserialize_changes_core(
        &self,
        host: &dyn ServerDropShadowHooks,
        reader: &mut BatchStreamReader<'_>,
        committed_at: Duration,
    ) {
        let compositor = host.server_compositor();
        ServerDropShadowHooks::deserialize_changes_extra(host, reader);
        let changed = reader.read::<DropShadowChangedFields>();
        if changed.contains(DropShadowChangedFields::BLUR_RADIUS_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `BlurRadius` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_blur_radius_property().base(),
                ExpressionVariant::create(self.blur_radius.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(DropShadowChangedFields::BLUR_RADIUS) {
            let value = reader.read::<f32>();
            self.set_blur_radius(host, value);
        }
        if changed.contains(DropShadowChangedFields::COLOR_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `Color` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_color_property().base(),
                ExpressionVariant::create(self.color.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(DropShadowChangedFields::COLOR) {
            let value = reader.read::<Color>();
            self.set_color(host, value);
        }
        if changed.contains(DropShadowChangedFields::MASK) {
            let value = read_server_object(reader, compositor.as_ref());
            self.set_mask(host, value);
        }
        if changed.contains(DropShadowChangedFields::OFFSET_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `Offset` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_offset_property().base(),
                ExpressionVariant::create(self.offset.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(DropShadowChangedFields::OFFSET) {
            let value = reader.read::<Vector3D>();
            self.set_offset(host, value);
        }
        if changed.contains(DropShadowChangedFields::OPACITY_ANIMATED) {
            let Some(animation) = reader.read_value::<AnimationInstanceFactory>().map(AnimationInstanceFactory::create) else {
                panic!("a batch starts an animation of `Opacity` without an animation instance");
            };
            host.set_animated_value(
                Self::id_of_opacity_property().base(),
                ExpressionVariant::create(self.opacity.get()),
                committed_at,
                animation,
            );
        } else if changed.contains(DropShadowChangedFields::OPACITY) {
            let value = reader.read::<f32>();
            self.set_opacity(host, value);
        }
        if changed.contains(DropShadowChangedFields::SOURCE_POLICY) {
            let value = reader.read::<CompositionDropShadowSourcePolicy>();
            self.set_source_policy(host, value);
        }
        ServerDropShadowHooks::on_fields_deserialized(host, changed);
    }

    /// The composition property with the given name, among the properties
    /// of this class and of its generated bases that have a variant form.
    pub fn get_composition_property(name: &str) -> Option<&'static CompositionProperty> {
        if name == "BlurRadius" {
            return Some(Self::id_of_blur_radius_property().base());
        }
        if name == "Color" {
            return Some(Self::id_of_color_property().base());
        }
        if name == "Offset" {
            return Some(Self::id_of_offset_property().base());
        }
        if name == "Opacity" {
            return Some(Self::id_of_opacity_property().base());
        }
        None
    }
}