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CLAUDE.md
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CLAUDE.md
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# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
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## Overview
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This is a personal XMonad + Xmobar configuration built as a Haskell project using Nix flakes. The project uses Relude as a custom Prelude and follows a strict, opinionated Haskell development workflow.
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## Build System
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This project uses **just** for task running and **Nix flakes** for reproducible builds:
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```bash
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# List available commands
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just
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# Build the project
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just build
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# Run XMonad executable
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just run xmonad
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# Run XMobar executable
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just run xmobar
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# Start REPL
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just repl
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# Access Hoogle documentation (serves at http://127.0.0.1:8888)
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just docs
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```
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### Nix Commands
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```bash
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# Update flake inputs
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nix flake update
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# Build all outputs
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nix --accept-flake-config run github:juspay/omnix ci
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# Run without installing
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nix run .
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# Enter development shell (or use direnv)
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nix develop
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```
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### Pre-commit Hooks
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Pre-commit hooks are automatically configured in the Nix shell and include:
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- **fourmolu** for Haskell formatting (with FOURMOLU_DISABLE/ENABLE pragmas where needed)
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- **nixpkgs-fmt** for Nix formatting
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- **hlint** for Haskell linting
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Run manually: `pre-commit run -a`
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## Project Structure
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The repository follows a standard Cabal package layout:
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- **`src/xmonad.hs`** - Main XMonad configuration (executable entry point)
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- **`src/xmobar.hs`** - XMobar status bar configuration (executable entry point)
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- **`src/XMonadConfig/GruvboxMaterial.hs`** - Shared color scheme module providing xmobar escape codes
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### Two Executables
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The project builds two separate executables defined in `xmonad-config.cabal`:
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1. **xmonad** - The window manager configuration
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2. **xmobar** - The status bar configuration
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Both share the `XMonadConfig.GruvboxMaterial` module for consistent theming.
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## Architecture
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### XMonad Configuration (`src/xmonad.hs`)
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The configuration is built compositionally using function application:
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```haskell
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main = xmonad
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. docks
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. ewmhFullscreen
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. ewmh
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. withNavigation2DConfig def
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. withSB myXmobar
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$ myConfig
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```
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**Key architectural components:**
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- **Navigation2D**: Directional window and screen navigation using arrow keys and Navigation2D module
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- **Custom keybindings**: Leader-key approach (`M-a` prefix) for spawning applications and layout switching
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- **Window manipulation**: Uses `XMonad.Actions.RotSlaves` for window rotation (mimics wezterm behavior)
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- **Layout system**: Three layouts - dynamic tiling, maximised, and fullscreen
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- **StatusBar integration**: Communicates with xmobar via `_XMONAD_LOG_1` X property
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- **Mnemonic bindings**: Control (M-C) for layout manipulation, Shift (M-S) for window operations
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### XMobar Configuration (`src/xmobar.hs`)
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Defines a status bar with:
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- System information (uname, uptime, disk usage)
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- Weather data (station YPJT)
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- Date/time
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- XMonad workspace/layout information from `_XMONAD_LOG_1` property
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The bar is positioned statically for a multi-monitor setup (positioned at x=1920).
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### Color Scheme Module
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`XMonadConfig.GruvboxMaterial` exports color functions that wrap strings in xmobar color escape codes. This ensures consistent theming across both XMonad and XMobar configurations.
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## Haskell Configuration
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### Custom Prelude
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Uses **Relude** instead of standard Prelude, configured in `xmonad-config.cabal`:
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```cabal
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mixins:
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base hiding (Prelude),
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relude (Relude as Prelude, Relude.Container.One),
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relude
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```
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### Default Extensions
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The following extensions are enabled project-wide:
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- DataKinds, DerivingStrategies, DerivingVia
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- LambdaCase, MultiWayIf, NoStarIsType
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- OverloadedStrings, StrictData, TypeFamilies, ViewPatterns
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### GHC Options
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Strict compilation with extensive warnings:
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- `-Wall`
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- `-Wincomplete-record-updates`, `-Wincomplete-uni-patterns`
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- `-Wmissing-deriving-strategies`, `-Wunused-foralls`
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- `-fprint-explicit-foralls`, `-fprint-explicit-kinds`
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## Development Workflow
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1. The project uses **haskell-flake** via flake-parts for Haskell package management
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2. HLS (Haskell Language Server) is available but checks are disabled in devShell (`hlsCheck.enable = false`)
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3. Static analysis via **stan** is enabled for the xmonad-config package
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4. The project filters `projectRoot` in `nix/modules/flake/haskell.nix` to avoid unnecessary rebuilds
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## Key Dependencies
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- **xmonad**, **xmonad-contrib** - Core window manager libraries
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- **xmobar** - Status bar library
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- **relude** - Alternative Prelude
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- **optics-core** - For lens-style accessors
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- **data-default** - Default instances for configuration
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129
src/xmonad.hs
129
src/xmonad.hs
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@ -1,17 +1,21 @@
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import Data.List as L
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import Data.Map qualified as M
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import XMonad
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import XMonad.Actions.CycleWS
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import XMonad.Actions.Navigation2D
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import XMonad.Actions.RotSlaves
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import XMonad.Actions.Submap
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import XMonad.Hooks.DynamicLog
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import XMonad.Hooks.EwmhDesktops
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import XMonad.Hooks.ManageDocks
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import XMonad.Hooks.Modal
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import XMonad.Hooks.StatusBar
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import XMonad.Layout.BinarySpacePartition
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import XMonad.Layout.NoBorders
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import XMonad.Layout.Renamed
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import XMonad.Layout.Spacing
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import XMonad.StackSet qualified as W
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import XMonad.Util.EZConfig
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import XMonad.Util.Font
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import XMonad.Util.Loggers
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import Graphics.X11.ExtraTypes.XF86
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@ -29,7 +33,8 @@ main = xmonad
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. docks
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. ewmhFullscreen
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. ewmh
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. withNavigation2DConfig def
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. withNavigation2DConfig def
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. modal [editMode]
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. withSB myXmobar
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$ myConfig
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@ -72,20 +77,24 @@ myKeymap =
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-- spawning programs
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[ ("M-a n", spawn myTerminal )
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, ("M-a e", spawn myLauncher )
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, ("M-a t", spawn myFileManager)
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, ("M-a f", spawn myFileManager)
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, ("M-a s", spawn myScrot )
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-- toggling layouts
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, ("M-a d", sendMessage $ JumpToLayout "dynamic tiling")
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, ("M-a m", sendMessage $ JumpToLayout "maximised" )
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, ("M-a f", sendMessage $ JumpToLayout "fullscreen" )
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-- quit window
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, ("M-a q", kill)
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-- toggling layouts
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, ("M-a <Backspace> t", sendMessage $ JumpToLayout "dynamic tiling" )
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, ("M-a <Backspace> b", sendMessage $ JumpToLayout "binary space partition")
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, ("M-a <Backspace> m", sendMessage $ JumpToLayout "maximised" )
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, ("M-a <Backspace> f", sendMessage $ JumpToLayout "fullscreen" )
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-- enable modal modes
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, ("M-a m e", setMode "edit")
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--
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-- Layout Navigation
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-- Modifier Keys
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--
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-- directional navigation of windows
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, ("M-<Down>" , windowGo D False)
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, ("M-<Right>" , windowGo R False)
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-- swap adjacent windows
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, ("M-S-<Up>" , windowSwap U False)
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, ("M-S-<Left>" , windowSwap L False)
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, ("M-S-<Down>" , windowSwap D False)
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, ("M-S-<Right>", windowSwap R False)
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-- cycle windows
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, ("M-<Page_Up>" , windows W.focusUp )
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, ("M-<Page_Down>", windows W.focusDown)
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-- window rotation
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, ("M-C-<Page_Up>", rotAllUp)
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, ("M-C-<Page_Down>", rotAllDown)
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-- cycle workspaces
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, ("M-<Home>", moveTo Prev hiddenWS)
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, ("M-<End>" , moveTo Next hiddenWS)
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-- focus screens (directional)
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, ("M-C-<Home>", screenGo L False) -- focus left monitor
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, ("M-C-<End>", screenGo R False) -- focus right monitor
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-- switch workspaces
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, ("M-1", windows $ W.greedyView "code" )
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, ("M-2", windows $ W.greedyView "chat" )
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, ("M-4", windows $ W.greedyView "games")
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, ("M-5", windows $ W.greedyView "misc" )
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-- cycle workspaces
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, ("M-<Home>", moveTo Prev hiddenWS)
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, ("M-<End>" , moveTo Next hiddenWS)
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-- send window to workspace
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, ("M-S-1", windows $ W.shift "code" )
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, ("M-S-2", windows $ W.shift "chat" )
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, ("M-S-4", windows $ W.shift "games")
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, ("M-S-5", windows $ W.shift "misc" )
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-- master pane manipulation
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, ("M-C-<Left>", sendMessage Shrink) -- control layout: shrink master
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, ("M-C-<Right>", sendMessage Expand) -- control layout: expand master
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, ("M-S-<Left>", sendMessage (IncMasterN (-1))) -- shift windows: fewer in master
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, ("M-S-<Right>", sendMessage (IncMasterN 1)) -- shift windows: more in master
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-- master window operations
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, ("M-<Delete>", windows W.focusMaster)
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, ("M-S-<Delete>", windows W.swapMaster)
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--
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-- Multimedia
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@ -148,16 +145,73 @@ myKeymap =
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]
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--
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-- Modal keybindings
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--
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editMode :: Mode
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editMode = mode "edit" $ mkKeysEz
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--
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-- Navigation2D / DynamicTiling
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--
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-- directional navigation of windows
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[ ("o", windowGo U False)
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, ("n", windowGo L False)
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, ("e", windowGo D False)
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, ("i", windowGo R False)
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-- swap adjacent windows
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, ("S-o", windowSwap U False)
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, ("S-n", windowSwap L False)
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, ("S-e", windowSwap D False)
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, ("S-i", windowSwap R False)
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-- shrink/expand the master area
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, ("f", sendMessage Shrink)
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, ("u", sendMessage Expand)
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-- number of windows in the master area
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, ("S-f", sendMessage (IncMasterN 1) )
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, ("S-u", sendMessage (IncMasterN (-1)))
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--
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-- BinarySpacePartition
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--
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-- expand windows
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, ("M-o", sendMessage $ ExpandTowardsBy U 0.01)
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, ("M-n", sendMessage $ ExpandTowardsBy L 0.01)
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, ("M-e", sendMessage $ ExpandTowardsBy D 0.01)
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, ("M-i", sendMessage $ ExpandTowardsBy R 0.01)
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-- shrink windows
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, ("M-M1-o", sendMessage $ ShrinkFromBy U 0.01)
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, ("M-M1-n", sendMessage $ ShrinkFromBy L 0.01)
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, ("M-M1-e", sendMessage $ ShrinkFromBy D 0.01)
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, ("M-M1-i", sendMessage $ ShrinkFromBy R 0.01)
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-- swap/rotate
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, ("M-r", sendMessage Rotate)
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, ("M-s", sendMessage Swap )
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-- split shift
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, ("M-f", sendMessage $ SplitShift Prev)
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, ("M-u", sendMessage $ SplitShift Next)
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]
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--
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-- Layouts
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--
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myLayouts = myTile ||| myMax ||| myFull
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myLayouts = myTile ||| myBsp ||| myMax ||| myFull
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where
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-- our layouts
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myTile = renamed [Replace "dynamic tiling"] . avoidStruts . myGaps $ Tall nmaster delta ratio
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myMax = renamed [Replace "maximised" ] . avoidStruts . myGaps $ Full
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myFull = renamed [Replace "fullscreen" ] . noBorders $ Full
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myTile = renamed [Replace "dynamic tiling" ] . avoidStruts . myGaps $ Tall nmaster delta ratio
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myBsp = renamed [Replace "binary space partition"] . avoidStruts . myGaps $ emptyBSP
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myMax = renamed [Replace "maximised" ] . avoidStruts . myGaps $ Full
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myFull = renamed [Replace "fullscreen" ] . noBorders $ Full
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-- add a configurable amount of space around windows.
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myGaps = spacingRaw False (Border 10 10 10 10) True (Border 10 10 10 10) True
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-- layout configuration
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@ -182,8 +236,11 @@ myXmobarPP = def
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, ppHiddenNoWindows = grey0 . wrap " " ""
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, ppUrgent = red . wrap " " ""
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, ppLayout = aqua . wrap (grey0 " <fn=1>[</fn> ") (grey0 " <fn=1>]</fn> ")
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, ppOrder = \[ws, l, _] -> [ws, l]
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, ppOrder = \case { [ws, l, title, mode] -> [ws, l, mode, title]; xs -> xs }
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, ppExtras = [lMode]
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}
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where
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lMode = xmobarColorL "#d8a657" "#282828" . fixedWidthL AlignCenter "-" 4 $ logMode
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--
|
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