4 files changed, 185 insertions, 7 deletions
diff --git a/lib/default.nix b/lib/default.nix
index 280f0429..187514a3 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -45,6 +45,8 @@ let
     genid_uint31 = x: ((lib.genid_uint32 x) + 16777216) / 2;
     genid_uint32 = import ./genid.nix { inherit lib; };
 
+    hexchars = stringToCharacters "0123456789abcdef";
+
     lpad = n: c: s:
       if lib.stringLength s < n
         then lib.lpad n c (c + s)
diff --git a/lib/genid.nix b/lib/genid.nix
index 0aed1d35..bfa4a9a0 100644
--- a/lib/genid.nix
+++ b/lib/genid.nix
@@ -32,6 +32,5 @@ let out = genid;
   hexint = x: hexvals.${toLower x};
 
   # :: attrset char uint4
-  hexvals = listToAttrs (imap (i: c: { name = c; value = i - 1; })
-                        (stringToCharacters "0123456789abcdef"));
+  hexvals = listToAttrs (imap (i: c: { name = c; value = i - 1; }) hexchars);
 in out
diff --git a/lib/svg-colors.json b/lib/svg-colors.json
new file mode 100644
index 00000000..834bf14f
--- /dev/null
+++ b/lib/svg-colors.json
@@ -0,0 +1,149 @@
+[
+  "aliceblue",
+  "antiquewhite",
+  "aqua",
+  "aquamarine",
+  "azure",
+  "beige",
+  "bisque",
+  "black",
+  "blanchedalmond",
+  "blue",
+  "blueviolet",
+  "brown",
+  "burlywood",
+  "cadetblue",
+  "chartreuse",
+  "chocolate",
+  "coral",
+  "cornflowerblue",
+  "cornsilk",
+  "crimson",
+  "cyan",
+  "darkblue",
+  "darkcyan",
+  "darkgoldenrod",
+  "darkgray",
+  "darkgreen",
+  "darkgrey",
+  "darkkhaki",
+  "darkmagenta",
+  "darkolivegreen",
+  "darkorange",
+  "darkorchid",
+  "darkred",
+  "darksalmon",
+  "darkseagreen",
+  "darkslateblue",
+  "darkslategray",
+  "darkslategrey",
+  "darkturquoise",
+  "darkviolet",
+  "deeppink",
+  "deepskyblue",
+  "dimgray",
+  "dimgrey",
+  "dodgerblue",
+  "firebrick",
+  "floralwhite",
+  "forestgreen",
+  "fuchsia",
+  "gainsboro",
+  "ghostwhite",
+  "gold",
+  "goldenrod",
+  "gray",
+  "green",
+  "greenyellow",
+  "grey",
+  "honeydew",
+  "hotpink",
+  "indianred",
+  "indigo",
+  "ivory",
+  "khaki",
+  "lavender",
+  "lavenderblush",
+  "lawngreen",
+  "lemonchiffon",
+  "lightblue",
+  "lightcoral",
+  "lightcyan",
+  "lightgoldenrodyellow",
+  "lightgray",
+  "lightgreen",
+  "lightgrey",
+  "lightpink",
+  "lightsalmon",
+  "lightseagreen",
+  "lightskyblue",
+  "lightslategray",
+  "lightslategrey",
+  "lightsteelblue",
+  "lightyellow",
+  "lime",
+  "limegreen",
+  "linen",
+  "magenta",
+  "maroon",
+  "mediumaquamarine",
+  "mediumblue",
+  "mediumorchid",
+  "mediumpurple",
+  "mediumseagreen",
+  "mediumslateblue",
+  "mediumspringgreen",
+  "mediumturquoise",
+  "mediumvioletred",
+  "midnightblue",
+  "mintcream",
+  "mistyrose",
+  "moccasin",
+  "navajowhite",
+  "navy",
+  "oldlace",
+  "olive",
+  "olivedrab",
+  "orange",
+  "orangered",
+  "orchid",
+  "palegoldenrod",
+  "palegreen",
+  "paleturquoise",
+  "palevioletred",
+  "papayawhip",
+  "peachpuff",
+  "peru",
+  "pink",
+  "plum",
+  "powderblue",
+  "purple",
+  "red",
+  "rosybrown",
+  "royalblue",
+  "saddlebrown",
+  "salmon",
+  "sandybrown",
+  "seagreen",
+  "seashell",
+  "sienna",
+  "silver",
+  "skyblue",
+  "slateblue",
+  "slategray",
+  "slategrey",
+  "snow",
+  "springgreen",
+  "steelblue",
+  "tan",
+  "teal",
+  "thistle",
+  "tomato",
+  "turquoise",
+  "violet",
+  "wheat",
+  "white",
+  "whitesmoke",
+  "yellow",
+  "yellowgreen"
+]
diff --git a/lib/types.nix b/lib/types.nix
index 32b4541a..5f01ccb5 100644
--- a/lib/types.nix
+++ b/lib/types.nix
@@ -3,11 +3,11 @@
 let
   inherit (lib)
     all any attrNames concatMapStringsSep concatStringsSep const filter flip
-    genid_uint31 hasSuffix head isInt isString length mergeOneOption mkOption
-    mkOptionType optional optionalAttrs optionals range splitString
+    genid_uint31 hasSuffix head importJSON isInt isString length mergeOneOption
+    mkOption mkOptionType optional optionalAttrs optionals range splitString
     stringLength substring test testString typeOf;
   inherit (lib.types)
-    attrsOf bool either enum int lines listOf nullOr path str submodule;
+    addCheck attrsOf bool either enum int lines listOf nullOr path str submodule;
 in
 
 rec {
@@ -287,15 +287,27 @@ rec {
     };
   });
 
+  boundedInt = min: max: mkOptionType {
+    name = "bounded integer";
+    check = x: isInt x && min <= x && x <= max;
+    merge = mergeOneOption;
+  };
+
+  lowerBoundedInt = min: mkOptionType {
+    name = "lower bounded integer";
+    check = x: isInt x && min <= x;
+    merge = mergeOneOption;
+  };
+
   positive = mkOptionType {
+    inherit (lowerBoundedInt 1) check;
     name = "positive integer";
-    check = x: isInt x && x > 0;
     merge = mergeOneOption;
   };
 
   uint = mkOptionType {
+    inherit (lowerBoundedInt 0) check;
     name = "unsigned integer";
-    check = x: isInt x && x >= 0;
     merge = mergeOneOption;
   };
 
@@ -583,6 +595,9 @@ rec {
     };
   };
 
+  flameshot.color =
+    either (addCheck str (test "#[0-9A-Fa-f]{6}")) svg.color-keyword;
+
   file-mode = mkOptionType {
     name = "file mode";
     check = test "[0-7]{4}";
@@ -601,6 +616,19 @@ rec {
     merge = mergeOneOption;
   };
 
+  # SVG 1.1, 4.4 Recognized color keyword names
+  #
+  # svg-colors.json has been generated with:
+  #   curl -sS https://www.w3.org/TR/SVG11/types.html#ColorKeywords |
+  #   fq -d html '[
+  #     grep_by(.["@class"]=="color-keywords") |
+  #     grep_by(.["@class"]=="prop-value"and.["#text"]!="").["#text"]
+  #   ] | sort'
+  #
+  svg.color-keyword = enum (importJSON ./svg-colors.json) // {
+    name = "SVG 1.1 recognized color keyword";
+  };
+
   systemd.unit-name = mkOptionType {
     name = "systemd unit name";
     check = x: