path: root/src/layout/monitor.rs

use std::cmp::min;
use std::rc::Rc;
use std::time::Duration;

use niri_ipc::{ColumnDisplay, SizeChange};
use smithay::backend::renderer::element::utils::{
    CropRenderElement, Relocate, RelocateRenderElement,
};
use smithay::output::Output;
use smithay::utils::{Logical, Point, Rectangle, Size};

use super::scrolling::{Column, ColumnWidth, ScrollDirection};
use super::tile::Tile;
use super::workspace::{
    OutputId, Workspace, WorkspaceAddWindowTarget, WorkspaceId, WorkspaceRenderElement,
};
use super::{ActivateWindow, HitType, LayoutElement, Options};
use crate::animation::{Animation, Clock};
use crate::input::swipe_tracker::SwipeTracker;
use crate::render_helpers::renderer::NiriRenderer;
use crate::render_helpers::RenderTarget;
use crate::rubber_band::RubberBand;
use crate::utils::transaction::Transaction;
use crate::utils::{output_size, round_logical_in_physical, ResizeEdge};

/// Amount of touchpad movement to scroll the height of one workspace.
const WORKSPACE_GESTURE_MOVEMENT: f64 = 300.;

const WORKSPACE_GESTURE_RUBBER_BAND: RubberBand = RubberBand {
    stiffness: 0.5,
    limit: 0.05,
};

#[derive(Debug)]
pub struct Monitor<W: LayoutElement> {
    /// Output for this monitor.
    pub(super) output: Output,
    /// Cached name of the output.
    output_name: String,
    // Must always contain at least one.
    pub(super) workspaces: Vec<Workspace<W>>,
    /// Index of the currently active workspace.
    pub(super) active_workspace_idx: usize,
    /// ID of the previously active workspace.
    pub(super) previous_workspace_id: Option<WorkspaceId>,
    /// In-progress switch between workspaces.
    pub(super) workspace_switch: Option<WorkspaceSwitch>,
    /// Clock for driving animations.
    pub(super) clock: Clock,
    /// Configurable properties of the layout.
    pub(super) options: Rc<Options>,
}

#[derive(Debug)]
pub enum WorkspaceSwitch {
    Animation(Animation),
    Gesture(WorkspaceSwitchGesture),
}

#[derive(Debug)]
pub struct WorkspaceSwitchGesture {
    /// Index of the workspace where the gesture was started.
    center_idx: usize,
    /// Current, fractional workspace index.
    pub(super) current_idx: f64,
    tracker: SwipeTracker,
    /// Whether the gesture is controlled by the touchpad.
    is_touchpad: bool,
}

/// Where to put a newly added window.
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
pub enum MonitorAddWindowTarget<'a, W: LayoutElement> {
    /// No particular preference.
    #[default]
    Auto,
    /// On this workspace.
    Workspace {
        /// Id of the target workspace.
        id: WorkspaceId,
        /// Override where the window will open as a new column.
        column_idx: Option<usize>,
    },
    /// Next to this existing window.
    NextTo(&'a W::Id),
}

pub type MonitorRenderElement<R> =
    RelocateRenderElement<CropRenderElement<WorkspaceRenderElement<R>>>;

impl WorkspaceSwitch {
    pub fn current_idx(&self) -> f64 {
        match self {