path: root/src/layout/tile.rs

use std::rc::Rc;

use niri_config::{Color, CornerRadius, GradientInterpolation};
use smithay::backend::allocator::Fourcc;
use smithay::backend::renderer::element::{Element, Kind};
use smithay::backend::renderer::gles::GlesRenderer;
use smithay::utils::{Logical, Point, Rectangle, Scale, Size, Transform};

use super::focus_ring::{FocusRing, FocusRingRenderElement};
use super::opening_window::{OpenAnimation, OpeningWindowRenderElement};
use super::{
    LayoutElement, LayoutElementRenderElement, LayoutElementRenderSnapshot, Options, SizeFrac,
    RESIZE_ANIMATION_THRESHOLD,
};
use crate::animation::{Animation, Clock};
use crate::niri_render_elements;
use crate::render_helpers::border::BorderRenderElement;
use crate::render_helpers::clipped_surface::{ClippedSurfaceRenderElement, RoundedCornerDamage};
use crate::render_helpers::damage::ExtraDamage;
use crate::render_helpers::renderer::NiriRenderer;
use crate::render_helpers::resize::ResizeRenderElement;
use crate::render_helpers::snapshot::RenderSnapshot;
use crate::render_helpers::solid_color::{SolidColorBuffer, SolidColorRenderElement};
use crate::render_helpers::{render_to_encompassing_texture, RenderTarget};
use crate::utils::transaction::Transaction;

/// Toplevel window with decorations.
#[derive(Debug)]
pub struct Tile<W: LayoutElement> {
    /// The toplevel window itself.
    window: W,

    /// The border around the window.
    border: FocusRing,

    /// The focus ring around the window.
    ///
    /// It's supposed to be on the Workspace, but for the sake of a nicer open animation it's
    /// currently here.
    focus_ring: FocusRing,

    /// Whether this tile is fullscreen.
    ///
    /// This will update only when the `window` actually goes fullscreen, rather than right away,
    /// to avoid black backdrop flicker before the window has had a chance to resize.
    is_fullscreen: bool,

    /// The black backdrop for fullscreen windows.
    fullscreen_backdrop: SolidColorBuffer,

    /// Whether the tile should float upon unfullscreening.
    pub(super) unfullscreen_to_floating: bool,

    /// The size that the window should assume when going floating.
    ///
    /// This is generally the last size the window had when it was floating. It can be unknown if
    /// the window starts out in the tiling layout or fullscreen.
    pub(super) floating_window_size: Option<Size<i32, Logical>>,

    /// The position that the tile should assume when going floating, relative to the floating
    /// space working area.
    ///
    /// This is generally the last position the tile had when it was floating. It can be unknown if
    /// the window starts out in the tiling layout.
    pub(super) floating_pos: Option<Point<f64, SizeFrac>>,

    /// Currently selected preset width index when this tile is floating.
    pub(super) floating_preset_width_idx: Option<usize>,

    /// Currently selected preset height index when this tile is floating.
    pub(super) floating_preset_height_idx: Option<usize>,

    /// The animation upon opening a window.
    open_animation: Option<OpenAnimation>,

    /// The animation of the window resizing.
    resize_animation: Option<ResizeAnimation>,

    /// The animation of a tile visually moving horizontally.
    move_x_animation: Option<MoveAnimation>,

    /// The animation of a tile visually moving vertically.
    move_y_animation: Option<MoveAnimation>,

    /// Offset during the initial interactive move rubberband.
    pub(super) interactive_move_offset: Point<f64, Logical>,

    /// Snapshot of the last render for use in the close animation.
    unmap_snapshot: Option<TileRenderSnapshot>,

    /// Extra damage for clipped surface corner radius changes.
    rounded_corner_damage: RoundedCornerDamage,

    /// The view size for the tile's workspace.
    ///
    /// Used as the fullscreen target size.
    view_size: Size<f64, Logical>,

    /// Scale of the output the tile is on (and rounds its sizes to).
    scale: f64,

    /// Clock for driving animations.
    pub(super) clock: Clock,

    /// Configurable properties of the layout.
    pub(super) options: Rc<Options>,
}

niri_render_elements! {
    TileRenderElement<R> => {
        LayoutElement = LayoutElementRenderElement<R>,
        FocusRing = FocusRingRenderElement,
        SolidColor = SolidColorRenderElement,
        Opening = OpeningWindowRenderElement,
        Resize = ResizeRenderElement,
        Border = BorderRenderElement,
        ClippedSurface = ClippedSurfaceRenderElement<R>,
        ExtraDamage = ExtraDamage,
    }
}

pub type TileRenderSnapshot =
    RenderSnapshot<TileRenderElement<GlesRenderer>, TileRenderElement<GlesRenderer>>;

#[derive(Debug)]
struct ResizeAnimation {
    anim: Animation,
    size_from: Size<f64, Logical>,
    snapshot: LayoutElementRenderSnapshot,
}

#[derive(Debug)]
struct MoveAnimation {
    anim: Animation,
    from: f64,
}

impl<W: LayoutElement> Tile<W> {
    pub fn new(
        window: W,
        view_size: Size<f64, Logical>,
        scale: f64,
        clock: Clock,
        options: Rc<Options>,