Basic support for SK1 palettes

Author: dagronf

Quicklook/Palette Viewer/Palette Viewer.xcodeproj/project.pbxproj

@@ -163,7 +163,6 @@
 		2339F52B2BCE48EE000C74F6 /* MacTextEditorView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MacTextEditorView.swift; sourceTree = "<group>"; };
 		2339F52E2BCE490F000C74F6 /* LineNumberRulerView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = LineNumberRulerView.swift; sourceTree = "<group>"; };
 		2339F5302BCF3F33000C74F6 /* InputStream+extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "InputStream+extensions.swift"; sourceTree = "<group>"; };
-		234369B22DDAD4A800179233 /* CSSParsingTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CSSParsingTests.swift; sourceTree = "<group>"; };
 		2344F2432A5CDA4500E04CE1 /* CodePopupView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CodePopupView.swift; sourceTree = "<group>"; };
 		234D89732C20F182003D403B /* NumberFormatter+extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NumberFormatter+extensions.swift"; sourceTree = "<group>"; };
 		23524E5B2A79BA5F00F3FAEF /* GradientEditor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GradientEditor.swift; sourceTree = "<group>"; };
@@ -301,7 +300,6 @@
 				23C29F452A8F020700CAC733 /* PaletteViewerPaletteThumbnailGenerator */,
 				23A03DF628332AA2003846A4 /* Frameworks */,
 				23A03DE028332A83003846A4 /* Products */,
-				234369B22DDAD4A800179233 /* CSSParsingTests.swift */,
 			);
 			sourceTree = "<group>";
 		};
@@ -772,7 +770,7 @@
 					"@executable_path/../../../../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer.gradient-thumbnail-generator";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -802,7 +800,7 @@
 					"@executable_path/../../../../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer.gradient-thumbnail-generator";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -949,7 +947,7 @@
 					"@executable_path/../../../../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer.quicklook-palette";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -979,7 +977,7 @@
 					"@executable_path/../../../../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer.quicklook-palette";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -1014,7 +1012,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 14.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
@@ -1048,7 +1046,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 14.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
@@ -1077,7 +1075,7 @@
 					"@executable_path/../../../../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer.palette-thumbnail-generator";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -1107,7 +1105,7 @@
 					"@executable_path/../../../../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer.palette-thumbnail-generator";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -1138,7 +1136,7 @@
 					"@executable_path/../../../../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer.quicklook-gradient";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -1169,7 +1167,7 @@
 					"@executable_path/../../../../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.5;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.dagronf.palette-viewer.quicklook-gradient";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;

Quicklook/Palette Viewer/Palette Viewer/Info.plist

@@ -530,6 +530,20 @@
 			<key>NSDocumentClass</key>
 			<string>$(PRODUCT_MODULE_NAME).Document</string>
 		</dict>
+		<dict>
+			<key>CFBundleTypeName</key>
+			<string>sK1 Color Palette</string>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>LSHandlerRank</key>
+			<string>Default</string>
+			<key>LSItemContentTypes</key>
+			<array>
+				<string>public.dagronf.colorpalette.palette.sk1</string>
+			</array>
+			<key>NSDocumentClass</key>
+			<string>$(PRODUCT_MODULE_NAME).Document</string>
+		</dict>
 	</array>
 	<key>UTExportedTypeDeclarations</key>
 	<array>
@@ -1164,6 +1178,25 @@
 				</array>
 			</dict>
 		</dict>
+		<dict>
+			<key>UTTypeConformsTo</key>
+			<array>
+				<string>public.text</string>
+			</array>
+			<key>UTTypeDescription</key>
+			<string>sK1 Color Palette</string>
+			<key>UTTypeIcons</key>
+			<dict/>
+			<key>UTTypeIdentifier</key>
+			<string>public.dagronf.colorpalette.palette.sk1</string>
+			<key>UTTypeTagSpecification</key>
+			<dict>
+				<key>public.filename-extension</key>
+				<array>
+					<string>skp</string>
+				</array>
+			</dict>
+		</dict>
 	</array>
 	<key>UTImportedTypeDeclarations</key>
 	<array>

Quicklook/Palette Viewer/PaletteViewerPaletteThumbnailGenerator/Info.plist

@@ -35,6 +35,7 @@
 				<string>public.dagronf.colorpalette.palette.swatchbooker</string>
 				<string>public.dagronf.colorpalette.palette.afpalette</string>
 				<string>public.dagronf.colorpalette.palette.xara.palette</string>
+				<string>public.dagronf.colorpalette.palette.sk1</string>
 			</array>
 			<key>QLThumbnailMinimumDimension</key>
 			<integer>0</integer>

Quicklook/Palette Viewer/PaletteViewerQuickLookPlugin/Info.plist

@@ -37,6 +37,7 @@
 				<string>public.dagronf.colorpalette.palette.swatchbooker</string>
 				<string>public.dagronf.colorpalette.palette.afpalette</string>
 				<string>public.dagronf.colorpalette.palette.xara.palette</string>
+				<string>public.dagronf.colorpalette.palette.sk1</string>
 			</array>
 			<key>QLSupportsSearchableItems</key>
 			<false/>

Quicklook/Palette Viewer/Shared/PALCommon.swift

@@ -27,7 +27,8 @@ public let ExportablePaletteTypes: [String] = [
 	PAL.Coder.ProcreateSwatchesCoder.utTypeString,
 	PAL.Coder.AutodeskColorBook.utTypeString,
 	PAL.Coder.SimplePaletteCoder.utTypeString,
-	PAL.Coder.JCW.utTypeString
+	PAL.Coder.JCW.utTypeString,
+	PAL.Coder.SKP.utTypeString
 ]
 
 public let ExportablePaletteUTTypes: [UTType] = {

README.md

@@ -50,6 +50,7 @@ Supports the following :-
 * Simple Palette format (`.color-palette`)
 * SwatchBooker format (`.sbz`) ***(read only) (Apple platforms only)***
 * Xara Designer Palette format (`.jcw`)
+* SK1 Color Palette (`.skp`) ***Very basic support***  
 
 ## Supported gradient formats
 
@@ -124,6 +125,7 @@ Some features :-
 |`PAL.Coder.ScribusXMLPaletteCoder` | Scribus XML palette (.xml)                  | 
 |`PAL.Coder.SimplePaletteCoder`     | Simple Palette (.color-palette) v0.1        |
 |`PAL.Coder.SketchPalette`          | Sketch Palette (.sketchpalette)             |
+|`PAL.Coder.SKP`                    | SK1 Color Palette (.skp)                    |
 |`PAL.Coder.SVG`                    | SVG image file (.svg)                       |
 |`PAL.Coder.SwatchbookerCoder       | Swatchbooker Palette (.sbz)                 |
 |`PAL.Coder.VGA24BitPaletteCoder`   | 24-bit VGA palette (.pal)                   |
@@ -218,6 +220,7 @@ let paletteData = palette.export(format: .ase)
 | `PAL.Coder.ScribusXMLPaletteCoder` | XML                    | ✅       | ✅       | ✅              | ✅                | ❌               | ❌                     | RGB/CMYK only          | ❌               |
 | `PAL.Coder.SimplePaletteCoder`     | JSON                   | ✅       | ✅       | ✅              | ✅                | ❌               | ❌                     | RGB only               | ✅               |
 | `PAL.Coder.SketchPalette`          | XML                    | ✅       | ✅       | ❌              | ❌                | ❌               | ❌                     | RGB only               | ✅               |
+| `PAL.Coder.SKP`                    | Text                   | ✅       | ✅       | ✅              | ✅                | ❌               | ❌                     | RGB only               | ✅               |
 | `PAL.Coder.SVG`                    | SVG text               | ❌       | ✅       | ❌              | ✅                | ✅               | ❌                     | RGB only               | ✅               |
 | `PAL.Coder.SwatchbookerCoder`      | Binary                 | ✅       | ❌       | ✅              | ✅                | ❌               | ✅                     | ✅                     | ❌               |
 | `PAL.Coder.ProcreateSwatchesCoder` | Binary                 | ✅       | ✅       | ❌              | ✅                | ✅               | ❌                     | ❌                     | ✅               |
@@ -431,6 +434,12 @@ which only deals with loading gradients.
 
 This coder is somewhat hacky. For the sample files I've used it seems to work!
 
+### SK1 palette support
+
+SK1 (SKP) palettes appears to be chunks of Python code.  The coder for it is very simple - it basically regexes on 
+the `color(['RGB'` line to pull out r,g,b,a and name components. There is no check whether the file is valid, as 
+this would require a complete python compilation.
+
 ## Disclaimer
 
 I am not affiliated with any of the brands mentioned within this package. All trademarks and brand names are the property of their respective owners.

Sources/ColorPaletteCodable/coders/palette/SKPPaletteCoder.swift

@@ -0,0 +1,168 @@
+//
+//  Copyright © 2025 Darren Ford. All rights reserved.
+//
+//  MIT license
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+//  documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
+//  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
+//  permit persons to whom the Software is furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all copies or substantial
+//  portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+//  WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+//  OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+//  OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+import DSFRegex
+import Foundation
+
+public extension PAL.Coder {
+	/// A coder for SK1 color palettes
+	///
+	/// The decoder here is _very_ rudimentary, as the SKP format appears to be Python code
+	/// I was too lazy to write a full python executable, so I'm just using very simple regex matching for RGB entries
+	struct SKP: PAL_PaletteCoder {
+		public let format: PAL.PaletteFormat = .skp
+		public let name = "SK1 Color Palette"
+		public let fileExtension = ["skp"]
+		public static let utTypeString = "public.dagronf.colorpalette.palette.sk1"   // conforms to `public.text`
+
+		public init() {}
+	}
+}
+
+private let __rgbColorRegex = try! DSFRegex(#"color\(\['RGB', \[(\b\d+(?:\.\d+)?\b), (\b\d+(?:\.\d+)?\b), (\b\d+(?:\.\d+)?\b)\], (\b\d+(?:\.\d+)?\b),.*?'(.*?)'"#)
+private let __paletteNameRegex = try! DSFRegex(#"set_name\((?:.*?)'(.*?)'\)"#)
+
+// MARK: - Decoding
+
+public extension PAL.Coder.SKP {
+	/// Create a palette from the contents of the input stream
+	/// - Parameter inputStream: The input stream containing the encoded palette
+	/// - Returns: A palette
+	func decode(from inputStream: InputStream) throws -> PAL.Palette {
+		// Load text from the input stream
+		guard let decoded = String.decode(from: inputStream) else {
+			throw PAL.CommonError.unableToLoadFile
+		}
+
+		// All the lines in the file
+		let lines = decoded.text.lines
+
+		// Check we're a valid
+		guard let first = lines.first, first.hasPrefix("##sK1 palette") else {
+			throw PAL.CommonError.invalidFormat
+		}
+
+		var palette = PAL.Palette(format: self.format)
+
+		for line in lines.dropFirst() {
+			let l = line.trimmingCharacters(in: CharacterSet.whitespaces)
+
+			if l.isEmpty {
+				// Skip over empty lines
+				break
+			}
+
+			do {
+				// Check if it's the palette name
+				//   set_name('Bluecurve icon colors')
+				let namedefs = __paletteNameRegex.matches(for: l)
+				namedefs.forEach { match in
+					let name = String(l[match.captures[0]])
+					if name.isNotEmpty {
+						palette.name = name
+					}
+				}
+			}
+
+			// Check if it's a color definition
+			do {
+				let searchResult = __rgbColorRegex.matches(for: l)
+				// Loop over each of the matches found, and print them out
+				searchResult.forEach { match in
+					if
+						let red = Double(l[match.captures[0]]),
+						let green = Double(l[match.captures[1]]),
+						let blue = Double(l[match.captures[2]]),
+						let alpha = Double(l[match.captures[3]])
+					{
+						let name = String(l[match.captures[4]])
+						let color = rgbf(red, green, blue, alpha, name: name)
+						palette.colors.append(color)
+					}
+				}
+			}
+		}
+		if palette.allColors().count == 0 {
+			throw PAL.CommonError.invalidFormat
+		}
+		return palette
+	}
+}
+
+// MARK: - Encoding
+
+public extension PAL.Coder.SKP {
+	/// Encode the palette
+	/// - Parameter palette: The palette to encode
+	/// - Returns: The encoded representation  of the palette
+	func encode(_ palette: PAL.Palette) throws -> Data {
+
+		var result = "##sK1 palette\n"
+		result += "palette()\n"
+		result += "set_name('\(palette.name)')\n"
+		result += "set_source('ColorPaletteCodable')\n"
+		result += "set_columns(4)\n"
+
+		for color in palette.allColors() {
+			let rgb = try color.rgb()
+			let colorName = color.name.replacingOccurrences(of: "'\"", with: "_")
+			result += "color(['RGB', [\(rgb.rf), \(rgb.gf), \(rgb.bf)], \(rgb.af), '\(colorName)'])\n"
+		}
+
+		result += "palette_end()\n"
+
+		guard let data = result.data(using: .utf8) else {
+			throw PAL.CommonError.invalidFormat
+		}
+		return data
+	}
+}
+
+// MARK: - UTType identifiers
+
+#if canImport(UniformTypeIdentifiers)
+import UniformTypeIdentifiers
+@available(macOS 11, iOS 14, tvOS 14, watchOS 7, *)
+public extension UTType {
+	static let sk1 = UTType(exportedAs: PAL.Coder.SKP.utTypeString, conformingTo: .text)
+}
+#endif
+
+
+// MARK: - Notes
+
+
+/*
+##sK1 palette
+palette()
+set_name('iOS 7 colors')
+set_source('Apple')
+add_comments('The palette is published here:')
+add_comments('https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/ColorImagesText.html')
+set_columns(4)
+color(['RGB', [0.35294117647058826, 0.7843137254901961, 0.9803921568627451], 1.0, '#5AC8FA'])
+color(['RGB', [1.0, 0.8, 0.0], 1.0, '#FFCC00'])
+color(['RGB', [1.0, 0.5843137254901961, 0.0], 1.0, '#FF9500'])
+color(['RGB', [1.0, 0.17647058823529413, 0.3333333333333333], 1.0, '#FF2D55'])
+color(['RGB', [0.0, 0.47843137254901963, 1.0], 1.0, '#007AFF'])
+color(['RGB', [0.2980392156862745, 0.8509803921568627, 0.39215686274509803], 1.0, '#4CD964'])
+color(['RGB', [1.0, 0.23137254901960785, 0.18823529411764706], 1.0, '#FF3B30'])
+color(['RGB', [0.5568627450980392, 0.5568627450980392, 0.5764705882352941], 1.0, '#8E8E93'])
+palette_end()
+*/