dotfiles/dot_config/hypr/looknfeel.lua

-- Change the default Omarchy look'n'feel.
--
-- Load order is Omarchy defaults -> current theme's hyprland.lua -> this file
-- (see $OMARCHY_PATH/default/hypr/omarchy.lua), so whatever is set here is the
-- last writer and wins over the theme. That is the point of this file: a theme
-- picks colours, the compositor's feel stays ours.

-- Flat by default, glass for terminals only.
--
-- Stock quattro is rounding 0, blur off, shadow off
-- ($OMARCHY_PATH/default/hypr/looknfeel.lua); themes that ship a hyprland.lua
-- turn all three on for every window (Cyberdream and Spectra both did), which
-- on this box is a bad trade: blur over an eDP panel plus a 5K Studio Display
-- is real frame time on an iGPU sharing system memory, and Chromium/Electron
-- windows cannot paint a transparent background, so fading them just shows
-- wallpaper where page background should be.
--
-- Blur has to be enabled globally to exist at all -- there is no positive
-- `blur` window rule, only `no_blur`, and kitty's own `background_blur` (the
-- ext-background-effect-v1 protocol, which Hyprland 0.56 does implement) is a
-- no-op while decoration:blur:enabled is false. So: switch it on here, then
-- opt every window out again except the terminals below.
hl.config({
  general = {
    -- Scrolling (niri-style tape) instead of Omarchy's dwindle. Per-workspace
    -- layouts saved by omarchy-hyprland-workspace-layout-toggle (SUPER + W;
    -- ~/.local/state/omarchy/workspace-layouts/*.lua) still win for the
    -- workspaces they name.
    layout = "scrolling",
  },

  decoration = {
    rounding = 0,

    -- Backdrop behind every scratch (special) workspace: the desktop under it
    -- is darkened by this fraction.
    dim_special = 0.33,

    blur = {
      enabled = true,
      -- Cheaper than the themes' size 6 / 3 passes; with only terminals
      -- blurred this is a handful of quads per frame, not the whole screen.
      size = 5,
      passes = 2,
      brightness = 0.8,
      contrast = 1.1,
      vibrancy = 0.15,
      noise = 0.01,
      new_optimizations = true,
      popups = false,
    },

    shadow = {
      enabled = false,
    },
  },

  group = {
    groupbar = {
      -- Square tab plates, to match rounding = 0 above.
      gradient_rounding = 0,
    },
  },
})

-- Omarchy tags every mapped window `default-opacity` and fades it to
-- 0.985 / 0.96 ($OMARCHY_PATH/default/hypr/windows.lua); that stock fade is
-- kept. Rules are last-match-wins, so this only opts every window out of the
-- blur enabled above -- the few percent of wallpaper that shows through an
-- inactive window is the same as stock, where blur is off entirely.
o.window({ tag = "default-opacity" }, { no_blur = true })

-- The exception: terminals carry their own alpha (kitty's
-- `background_opacity`, 0.9 in ~/.config/kitty/kitty.conf), so they are the one
-- surface where blurring the backdrop buys anything. Full class list because
-- the kitty hosts run under their own app-ids (kitty-herdr, kitty-tmux,
-- kitty-goliath) and Omarchy tags nothing as `terminal`.
o.window(
  "^(kitty(-.*)?|Alacritty|com\\.mitchellh\\.ghostty|foot|org\\.codeberg\\.dnkl\\.foot|wezterm)$",
  { no_blur = false }
)

-- Themes are also free to re-enable the workspace slide (Spectra sets
-- `workspaces` with its "flow" bezier); Omarchy's default is off. Restate it.
-- workspacesIn/workspacesOut are not overridden anywhere, so they inherit this.
hl.animation({ leaf = "workspaces", enabled = false })

-- Slow, constant rotation of the active-border gradient (the theme's
-- hyprland_active_border; Cyberdream's is accent -> cyan). `loop` restarts
-- the angle each turn so it never eases or stops; speed is deciseconds per
-- revolution, so 100 = one lap every 10 s. Costs a redraw of the border each
-- frame while a window is mapped.
hl.animation({ leaf = "borderangle", enabled = true, speed = 100, bezier = "linear", style = "loop" })

-- https://wiki.hypr.land/Configuring/Basics/Variables/#general
-- hl.config({
--   general = {
--     -- No gaps between windows or borders.
--     gaps_in = 0,
--     gaps_out = 0,
--     border_size = 0,
--
--     -- Change to niri-like side-scrolling layout.
--     layout = "scrolling",
--   },
-- })

-- https://wiki.hypr.land/Configuring/Basics/Variables/#animations
-- hl.config({
--   animations = {
--     -- Disable all animations.
--     enabled = false,
--   },
-- })

-- https://wiki.hypr.land/Configuring/Basics/Variables/#layout
-- hl.config({
--   layout = {
--     -- Avoid overly wide single-window layouts on wide screens.
--     single_window_aspect_ratio = { 1, 1 },
--   },
-- })

-- Scrolling layout, matched to niri's layout block
-- (~/.config/niri/config.d/20-layout-and-overview.kdl). Wins over Omarchy's
-- column_width = 0.49.
hl.config({
  scrolling = {
    -- default-column-width { proportion 0.5; }
    column_width = 0.5,
    -- preset-column-widths; SUPER + R / SUPER + SHIFT + R cycle these
    -- (colresize +conf / -conf via omarchy-cycle-window-size).
    explicit_column_widths = "0.333, 0.5, 0.667",
    -- center-focused-column "never": scroll only as far as needed to fit the
    -- focused column. SUPER + C centers on demand.
    focus_fit_method = 1,
    -- niri keeps a lone column at its own width instead of filling the screen.
    fullscreen_on_one_column = false,
    -- niri stops at the first/last column instead of wrapping around.
    wrap_focus = false,
    wrap_swapcol = false,
  },
})