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ideas:color-object [2014/07/07 17:49] – whitespace tabatkinsideas:color-object [2021/10/01 15:36] (current) – fantasai
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 +<note>
 +This has been superseded by work on a common color API for the Web Platform and by work on Typed OM for manipulating CSS syntax specifically.
 +</note>
 +
 +<code idl>
   [Constructor(double r, double g, double b, optional double a=1),   [Constructor(double r, double g, double b, optional double a=1),
    Constructor(RGBAColorInit color)]    Constructor(RGBAColorInit color)]
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     attribute double a;     attribute double a;
          
-    HSLAColor asHSL();+    HSLAColorInit asHSL();
     static RGBAColor fromHSLA(double h, double s, double l, optional double a=1);     static RGBAColor fromHSLA(double h, double s, double l, optional double a=1);
     static RGBAColor fromHSLA(optional HSLAColorInit color);     static RGBAColor fromHSLA(optional HSLAColorInit color);
          
-    HexColor asHex();+    HexColorInit asHex();
     static RGBAColor fromHex(octet r, octet g, octet b, optional octet a=255);     static RGBAColor fromHex(octet r, octet g, octet b, optional octet a=255);
     static RGBAColor fromHex(optional HexColorInit color);     static RGBAColor fromHex(optional HexColorInit color);
          
-    stringifier DOMString (optional DOMString type="rgba");+    DOMString? asName(); 
 +     
 +    DOMString toString(optional DOMString type="rgba");
     static readonly attribute Map serializationTypes;     static readonly attribute Map serializationTypes;
   };   };
 +</code>
  
-The stringifier looks up the type in the RGBAColor.serializationTypes Map; if it finds a function, it calls that with the RGBAColor as the sole argument and returns whatever the function returns.  It's preloaded with UA-defined functions for "hex3", "hex6", "rgb", "rgba", "hsl", and "hsla". +The ''toString()'' method looks up the type in the ''RGBAColor.serializationTypes Map''; if it finds a function, it calls that with the ''RGBAColor'' as the sole argument and returns whatever the function returns.  It's preloaded with UA-defined functions for "hex3", "hex6", "rgb", "rgba", "hsl", and "hsla". 
  
-Authors can define their own color formats by adding a fromFoo() to RGBAColor, a toFoo() to RGBAColor.prototype, and adding an appropriate serialization tag to RGBAColor.serializationTypes.+Authors can define their own color formats by adding a ''fromFoo()'' to ''RGBAColor'', a ''toFoo()'' to ''RGBAColor.prototype'', and adding an appropriate serialization tag to ''RGBAColor.serializationTypes''.
  
 +<code idl>
   dictionary RGBAColorInit {   dictionary RGBAColorInit {
     double r = 0;     double r = 0;
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   partial interface CSS {   partial interface CSS {
-    CSSColor parseColor(DOMString color, optional Element el);+    RGBAColor parseColor(DOMString color, optional Element el);
   };   };
 +</code>
 +
 +''parseColor()'' takes a string containing any CSS color, and returns an RGBAColor for it.  If the string isn't parseable as a color, throw a ''SyntaxError'' exception.
  
-If parseColor is called with a color that depends on the element on which it is used, +The optional second argument is used to resolve colors that vary based on the element, such as ''currentcolor''.  If such a color is parsed but the second argument is not provided, throw a XXX exception.
-such as ''currentcolor'' or ''inherit'', +
-but no el argument was passed, +
-throw a XXX error.+
 
ideas/color-object.1404780541.txt.gz · Last modified: 2014/12/09 15:48 (external edit)
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