Add module for Okular (#244)

README.md

@@ -41,6 +41,7 @@ At the moment `plasma-manager` supports configuring the following:
   modules in `plasma-manager`:
   - kate
   - konsole
+  - okular
 
 Additionally there are more functionality than just listed above, and more
 functionality to come in the future!

modules/apps/default.nix

@@ -4,5 +4,6 @@
   imports = [
     ./konsole.nix
     ./kate
+    ./okular.nix
   ];
 }

modules/apps/okular.nix

@@ -0,0 +1,146 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.programs.okular;
+in with lib.types;
+{
+  options.programs.okular = {
+    enable = lib.mkEnableOption ''
+      Enable configuration management for okular.
+    '';
+      
+    package = lib.mkPackageOption pkgs [ "kdePackages" "okular" ] {
+      example = "pkgs.libsForQt5.okular";
+      extraDescription = ''
+        Which okular package to install. Use `pkgs.libsForQt5.okular` in Plasma5 and
+        `pkgs.kdePackages.okular` in Plasma6.
+      '';
+    };
+
+    # ==================================
+    #     GENERAL
+    general = {
+      smoothScrolling = lib.mkOption {
+        description = "Use smooth scrolling.";
+        default = null;
+        type = nullOr bool;
+      };
+
+      showScrollbars = lib.mkOption {
+        description = "Show scrollbars.";
+        default = null;
+        type = nullOr bool;
+      };
+
+      openFileInTabs = lib.mkOption {
+        description = "Open files in tabs.";
+        default = null;
+        type = nullOr bool;
+      };
+
+      viewContinuous = lib.mkOption {
+        description = "Open in continous mode by default.";
+        default = null;
+        type = nullOr bool;
+      };
+    };
+
+    # ==================================
+    #     ACCESSIBILITY
+    accessibility = {
+      highlightLinks = lib.mkOption {
+        description = "Draw borders around links.";
+        default = null;
+        type = nullOr bool;
+      };
+
+      changeColors = {
+        enable = lib.mkEnableOption "Whether to change the colors of the documents.";
+        mode = lib.mkOption {
+          description = "Mode used to change the colors.";
+          default = null;
+          type = nullOr (enum [ "Inverted" "Paper" "Recolor" ]);
+        };
+        paperColor = lib.mkOption {
+          description = "Paper color in RGB. Used for the `Paper` mode.";
+          default = null;
+          example = "255,255,255";
+          type = nullOr str;
+        };
+        recolorBackground = lib.mkOption {
+          description = "New background color in RGB. Used for the `Recolor` mode.";
+          default = null;
+          example = "0,0,0";
+          type = nullOr str;
+        };
+        recolorForeground = lib.mkOption {
+          description = "New foreground color in RGB. Used for the `Recolor` mode.";
+          default = null;
+          example = "255,255,255";
+          type = nullOr str;
+        };
+      };
+    };
+
+    # ==================================
+    #     PERFORMANCE
+    performance = {
+      enableTransparencyEffects = lib.mkOption {
+        description = "Enable transparancey effects. This may increase CPU usage.";
+        default = null;
+        type = nullOr bool;
+      };
+
+      memoryUsage = lib.mkOption {
+        description = "Memory usage of Okular. This impacts the speed performance of Okular as it determines how much computation results are kept in memory and not recomputed.";
+        default = null;
+        type = nullOr (enum [ "Low" "Normal" "Agressive" "Greedy" ]);
+      };
+    };
+  };
+
+  config = {
+    home.packages = lib.mkIf (cfg.enable) [ cfg.package ];
+  };
+
+  # ==================================
+  #     WRITING THE OKULARPARTRC
+  config.programs.plasma.configFile."okularpartrc" = lib.mkIf cfg.enable
+  (let
+    gen = cfg.general;
+    acc = cfg.accessibility;
+    perf = cfg.performance;
+    applyIfSet = opt: lib.mkIf (opt != null) opt;
+  in
+  {
+    "PageView" = {
+      "SmoothScrolling" = applyIfSet gen.smoothScrolling;
+      "ShowScrollBars" = applyIfSet gen.showScrollbars;
+      "ViewContinuous" = applyIfSet gen.viewContinuous;
+    };
+
+    "General" = {
+      "ShellOpenFileInTabs" = applyIfSet gen.openFileInTabs;
+    };
+
+    "Document" = {
+      "ChangeColors" = applyIfSet acc.changeColors.enable;
+      "RenderMode" = applyIfSet acc.changeColors.mode;
+      "PaperColor" = applyIfSet acc.changeColors.paperColor;
+    };
+
+    "Dlg Accessibility" = {
+      "HighlightLinks" = applyIfSet acc.highlightLinks;
+      "RecolorBackground" = applyIfSet acc.changeColors.recolorBackground;
+      "RecolorForeground" = applyIfSet acc.changeColors.recolorForeground;
+    };
+
+    "Core Performance" = {
+      "MemoryLevel" = applyIfSet perf.memoryUsage;
+    };
+    
+    "Dlg Performance" = {
+      "EnableCompositing" = applyIfSet perf.enableTransparencyEffects;
+    };
+  });
+}