home: wm: i3: add configuration

home/wm/i3.nix

@@ -1,14 +1,298 @@
-{ config, lib, ... }:
+{ config, lib, pkgs, ... }:
 let
   isEnabled = config.my.home.wm.windowManager == "i3";
+
+  terminal = "i3-sensible-terminal";
+
+  alt = "Mod1"; # `Alt` key
+  modifier = "Mod4"; # `Super` key
+  movementKeys = [ "Left" "Down" "Up" "Right" ];
+  vimMovementKeys = [ "h" "j" "k" "l" ];
+  shutdownMode =
+    "(l)ock, (e)xit, switch_(u)ser, (h)ibernate, (r)eboot, (Shift+s)hutdown";
+
+  # Takes an attrset of bindings for movement keys, transforms it to Vim keys
+  toVimKeyBindings =
+    let
+      toVimKeys = builtins.replaceStrings movementKeys vimMovementKeys;
+    in
+    lib.my.renameAttrs toVimKeys;
+
+  # Takes an attrset of bindings for movement keys, add equivalent Vim keys
+  addVimKeyBindings = bindings: bindings // (toVimKeyBindings bindings);
+  # Generate an attrset of movement bindings, using the mapper function
+  genMovementBindings = f: addVimKeyBindings (lib.my.genAttrs' movementKeys f);
 in
 {
   config = lib.mkIf isEnabled {
+    home.packages = with pkgs; [
+      arandr # Used by a mapping
+      flameshot # Used by a mapping, started at startup
+      playerctl # Used by a mapping
+    ];
+
     xsession.windowManager.i3 = {
       enable = true;
 
       config = {
-        modifier = "Mod4"; # `Super` key
+        inherit modifier;
+
+        bars =
+          let
+            barConfigPath =
+              config.xdg.configFile."i3status-rust/config-top.toml".target;
+          in
+          [
+            {
+              statusCommand = "i3status-rs ${barConfigPath}";
+              trayOutput = "primary";
+              position = "top";
+
+              colors = {
+                background = "#021215";
+                statusline = "#93a1a1";
+                separator = "#2aa198";
+
+                focusedWorkspace = {
+                  border = "#2aa198";
+                  background = "#073642";
+                  text = "#eee895";
+                };
+
+                activeWorkspace = {
+                  border = "#073642";
+                  background = "#002b36";
+                  text = "#839496";
+                };
+
+                inactiveWorkspace = {
+                  border = "#002b36";
+                  background = "#021215";
+                  text = "#586e75";
+                };
+
+                urgentWorkspace = {
+                  border = "#cb4b16";
+                  background = "#dc322f";
+                  text = "#fdf6e3";
+                };
+              };
+            }
+          ];
+
+        floating = {
+          inherit modifier;
+
+          criteria = [
+            { class = "^tridactyl_editor$"; }
+            { class = "^Blueman-.*$"; }
+            { title = "^htop$"; }
+            { class = "^Thunderbird$"; instance = "Mailnews"; window_role = "filterlist"; }
+            { class = "^Pavucontrol.*$"; }
+            { class = "^Arandr$"; }
+          ];
+        };
+
+        focus = {
+          followMouse = true; # It is annoying sometimes, but useful enough to use
+          mouseWarping = true; # Let's moving around when switching screens
+        };
+
+        fonts = [
+          "DejaVu Sans Mono 8"
+        ];
+
+        # I don't care for i3's default values, I specify them all explicitly
+        keybindings = builtins.foldl' (lhs: rhs: lhs // rhs) { } [
+          {
+            # The basics
+            "${modifier}+Return" = "exec ${terminal}";
+            "${modifier}+Shift+Return" = "exec env TMUX=nil ${terminal}";
+            "${modifier}+Shift+q" = "kill";
+            "${modifier}+f" = "fullscreen toggle";
+            "${modifier}+Shift+c" = "reload";
+            "${modifier}+Shift+r" = "restart";
+            "${modifier}+Shift+e" =
+              "exec i3-nagbar -t warning -m 'Do you want to exit i3?' -b 'Yes' 'i3-msg exit'";
+          }
+          {
+            # Splits
+            "${modifier}+g" = "split h"; # Horizontally
+            "${modifier}+v" = "split v"; # Vertically
+          }
+          {
+            # Layouts
+            "${modifier}+s" = "layout stacking";
+            "${modifier}+w" = "layout tabbed";
+            "${modifier}+e" = "layout toggle split";
+          }
+          {
+            # Toggle tiling/floating
+            "${modifier}+Control+space" = "floating toggle";
+            # Change focus between tiling/floating
+            "${modifier}+space" = "focus mode_toggle";
+          }
+          {
+            # Focus parent container
+            "${modifier}+q" = "focus parent";
+            # Focus child container
+            "${modifier}+a" = "focus child";
+          }
+          {
+            # Rofi tools
+            "${modifier}+d" = "exec rofi -show drun -disable-history";
+            "${modifier}+Shift+d" = "exec rofi -show run -disable-history";
+            "${modifier}+p" = "exec --no-startup-id flameshot gui";
+            "${modifier}+Shift+p" = "exec rofi -show emoji";
+          }
+          (
+            # Changing container focus
+            genMovementBindings (
+              key: lib.nameValuePair
+                "${modifier}+${key}"
+                "focus ${lib.toLower key}"
+            )
+          )
+          (
+            # Changing screen focus
+            genMovementBindings (
+              key: lib.nameValuePair
+                "${modifier}+${alt}+${key}"
+                "focus output ${lib.toLower key}"
+            )
+          )
+          (
+            # Moving workspace to another screen
+            genMovementBindings (
+              key: lib.nameValuePair
+                "${modifier}+${alt}+Control+${key}"
+                "move workspace to output ${lib.toLower key}"
+            )
+          )
+          (
+            # Moving container to another screen
+            genMovementBindings (
+              key: lib.nameValuePair
+                "${modifier}+${alt}+Shift+${key}"
+                "move container to output ${lib.toLower key}"
+            )
+          )
+          (addVimKeyBindings {
+            # Scroll through workspaces on given screen
+            "${modifier}+Control+Left" = "workspace prev_on_output";
+            "${modifier}+Control+Right" = "workspace next_on_output";
+            # Use scratchpad
+            "${modifier}+Control+Up" = "move to scratchpad";
+            "${modifier}+Control+Down" = "scratchpad show";
+          })
+          (
+            # Moving floating window
+            genMovementBindings (
+              key: lib.nameValuePair
+                "${modifier}+Shift+${key}"
+                "move ${lib.toLower key} 10 px"
+            )
+          )
+          {
+            # Media keys
+            "XF86AudioRaiseVolume" = "exec amixer -q -D pulse sset Master 5%+";
+            "XF86AudioLowerVolume" = "exec amixer -q -D pulse sset Master 5%-";
+            "Control+XF86AudioRaiseVolume" = "exec amixer -q -D pulse sset Master 1%+";
+            "Control+XF86AudioLowerVolume" = "exec amixer -q -D pulse sset Master 1%-";
+            "XF86AudioMute" = "exec amixer -q -D pulse sset Master toggle";
+
+            "XF86AudioPlay" = "exec playerctl play-pause";
+            "XF86AudioNext" = "exec playerctl next";
+            "XF86AudioPrev" = "exec playerctl previous";
+          }
+          {
+            # Sub-modes
+            "${modifier}+r" = "mode resize";
+            "${modifier}+Shift+space" = "mode floating";
+            "${modifier}+0" = ''mode "${shutdownMode}"'';
+          }
+        ];
+
+        keycodebindings =
+          let
+            toKeycode = n: if n == 0 then 19 else n + 9;
+            createWorkspaceBindings = mapping: command:
+              let
+                createWorkspaceBinding = num:
+                  lib.nameValuePair
+                    "${mapping}+${toString (toKeycode num)}"
+                    "${command} ${toString num}";
+                oneToNine = builtins.genList (x: x + 1) 9;
+              in
+              lib.my.genAttrs' oneToNine createWorkspaceBinding;
+          in
+          builtins.foldl' (lhs: rhs: lhs // rhs) { } [
+            (createWorkspaceBindings modifier "workspace number")
+            (createWorkspaceBindings "${modifier}+Shift" "move container to workspace number")
+          ];
+
+        modes =
+          let
+            makeModeBindings = attrs: (addVimKeyBindings attrs) // {
+              "Escape" = "mode default";
+              "Return" = "mode default";
+            };
+          in
+          {
+            resize = makeModeBindings {
+              # Normal movements
+              "Left" = "resize shrink width 10 px or 10 ppt";
+              "Down" = "resize grow height 10 px or 10 ppt";
+              "Up" = "resize shrink height 10 px or 10 ppt";
+              "Right" = "resize grow width 10 px or 10 ppt";
+              # Small movements
+              "Control+Left" = "resize shrink width 1 px or 1 ppt";
+              "Control+Down" = "resize grow height 1 px or 1 ppt";
+              "Control+Up" = "resize shrink height 1 px or 1 ppt";
+              "Control+Right" = "resize grow width 1 px or 1 ppt";
+              # Big movements
+              "Shift+Left" = "resize shrink width 100 px or 100 ppt";
+              "Shift+Down" = "resize grow height 100 px or 100 ppt";
+              "Shift+Up" = "resize shrink height 100 px or 100 ppt";
+              "Shift+Right" = "resize grow width 100 px or 100 ppt";
+            };
+
+            floating = makeModeBindings {
+              # Normal movements
+              "Left" = "move left 10 px";
+              "Down" = "move down 10 px";
+              "Up" = "move up 10 px";
+              "Right" = "move right 10 px";
+              # Small movements
+              "Control+Left" = "move left 1 px";
+              "Control+Down" = "move down 1 px";
+              "Control+Up" = "move up 1 px";
+              "Control+Right" = "move right 1 px";
+              # Big movements
+              "Shift+Left" = "move left 100 px";
+              "Shift+Down" = "move down 100 px";
+              "Shift+Up" = "move up 100 px";
+              "Shift+Right" = "move right 100 px";
+            };
+
+            ${shutdownMode} = makeModeBindings {
+              "l" = "exec --no-startup-id loginctl lock-session, mode default";
+              "s" = "exec --no-startup-id systemctl suspend, mode default";
+              "u" = "exec --no-startup-id dm-tool switch-to-greeter, mode default";
+              "e" = "exec --no-startup-id i3-msg exit, mode default";
+              "h" = "exec --no-startup-id systemctl hibernate, mode default";
+              "r" = "exec --no-startup-id systemctl reboot, mode default";
+              "Shift+s" = "exec --no-startup-id systemctl poweroff, mode default";
+            };
+          };
+
+        startup = [
+          # FIXME
+          # { commdand; always; notification; }
+          {
+            command = "flameshot";
+          }
+        ];
       };
     };
   };