colors.hex vocab.

basis/colors/hex/authors.txt

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+John Benediktsson

basis/colors/hex/hex-docs.factor

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+! Copyright (C) 2010 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: colors help.markup help.syntax strings ;
+
+IN: colors.hex
+
+HELP: hex>rgba
+{ $values { "hex" string } { "rgba" color } }
+{ $description "Converts a hexadecimal string value into a " { $link color } "." }
+;
+
+HELP: rgba>hex
+{ $values { "rgba" color } { "hex" string } }
+{ $description "Converts a " { $link color } " into a hexadecimal string value." }
+;
+
+HELP: HEXCOLOR:
+{ $syntax "HEXCOLOR: value" }
+{ $description "Parses as a " { $link color } " object with the given hexadecimal value." }
+{ $examples
+  { $code
+    "USING: colors.hex io.styles ;"
+    "\"Hello!\" { { foreground HEXCOLOR: 336699 } } format nl"
+  }
+} ;
+
+ARTICLE: "colors.hex" "HEX colors"
+"The " { $vocab-link "colors.hex" } " vocabulary implements colors specified "
+"by their hexidecimal value."
+{ $subsections
+    hex>rgba
+    rgba>hex
+    POSTPONE: HEXCOLOR:
+}
+{ $see-also "colors" } ;
+
+ABOUT: "colors.hex"

basis/colors/hex/hex-tests.factor

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+! Copyright (C) 2010 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: colors colors.hex tools.test ;
+
+IN: colors.hex.test
+
+[ HEXCOLOR: 000000 ] [ 0.0 0.0 0.0 1.0 <rgba> ] unit-test
+[ HEXCOLOR: FFFFFF ] [ 1.0 1.0 1.0 1.0 <rgba> ] unit-test
+[ HEXCOLOR: abcdef ] [ "abcdef" hex>rgba ] unit-test
+[ HEXCOLOR: abcdef ] [ "ABCDEF" hex>rgba ] unit-test
+[ "ABCDEF" ] [ HEXCOLOR: abcdef rgba>hex ] unit-test

basis/colors/hex/hex.factor

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+! Copyright (C) 2010 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: accessors colors formatting grouping kernel lexer math
+math.parser sequences ;
+
+IN: colors.hex
+
+: hex>rgba ( hex -- rgba )
+    2 group [ hex> 255 /f ] map first3 1.0 <rgba> ;
+
+: rgba>hex ( rgba -- hex )
+    [ red>> ] [ green>> ] [ blue>> ] tri
+    [ 255 * >integer ] tri@ "%02X%02X%02X" sprintf ;
+
+SYNTAX: HEXCOLOR: scan hex>rgba suffix! ;

basis/colors/hex/summary.txt

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+Hexadecimal colors