[css-font-loading] Switch to using the new idl setlike declaration.

--HG--
extra : rebase_source : 00f52c615020565d3e1537665e6fc08fa4e07d20

Author: tabatkins

css-font-loading/Overview.bs

@@ -407,19 +407,10 @@ The <code>FontFaceSet</code> Interface</h2>
 		[Exposed=Window,Worker,
 		 Constructor(sequence<FontFace> initialFaces)]
 		interface FontFaceSet : EventTarget {
-			// Emulate the Set interface, until we can extend Set correctly.
-			readonly attribute unsigned long size;
-			void add(FontFace font);
-			boolean has(FontFace font);
-			boolean delete(FontFace font);
-			void clear();
-			Iterator entries();
-			Iterator keys();
-			Iterator values();
-			void forEach(ForEachCallback cb, optional any thisArg);
-			FontFace iterator;
-
-			// -- events for when loading state changes
+			// FontFaceSet is Set-like!
+			setlike&lt;FontFace>;
+
+			// events for when loading state changes
 			attribute EventHandler onloading;
 			attribute EventHandler onloadingdone;
 			attribute EventHandler onloadingerror;
@@ -440,70 +431,48 @@ The <code>FontFaceSet</code> Interface</h2>
 		};
 	</pre>
 
-	<dl dfn-type=attribute dfn-for="FontFaceSet">
-		<dt><dfn>ready</dfn> <span attribute-info for=FontFaceSet/ready></span>
+	<dl dfn-for="FontFaceSet">
+		<dt><dfn attribute>ready</dfn> <span attribute-info for=FontFaceSet/ready></span>
 		<dd>
 			This attribute reflects the {{FontFaceSet}}'s {{[[ReadyPromise]]}} slot.
 
 			See [[#font-face-set-ready]] for more details on this {{Promise}} and its use.
 
-		<dt><dfn>size</dfn> <span attribute-info for=FontFaceSet/size></span>
-		<dd>
-			This attribute reflects the <code>size</code> attribute of the {{FontFaceSet}}'s {{[[ContainedFonts]]}} slot.
-
 		<dt><dfn attribute for="FontFaceSet">status</dfn> <span attribute-info for="FontFaceSet/status"></span>
 		<dd>
 			If there are <a>possibly pending font loads</a>,
 			the {{FontFaceSet/status}} attribute must have the value <code>"loading"</code>.
 			Otherwise, it must have the value <code>"loaded"</code>.
-	</dl>
 
-	<dl dfn-type=method dfn-for="FontFaceSet">
-		<dt><dfn title="FontFaceSet()" constructor>FontFaceSet</dfn>(sequence&lt;{{FontFace}}> <dfn argument for="FontFaceSet/FontFaceSet()">initialFaces</dfn>)
+		<dt><dfn constructor title="FontFaceSet()">FontFaceSet</dfn>(sequence&lt;{{FontFace}}> <dfn argument for="FontFaceSet/FontFaceSet()">initialFaces</dfn>)
 		<dd>
 			The {{FontFaceSet}} constructor, when called,
-			must construct a new {{Set}} object
-			by passing its {{initialFaces}} argument
-			to the {{Set}} constructor,
-			then assigning that {{Set}} object to the {{FontFaceSet}}'s {{[[ContainedFonts]]}} slot.
-
-		<dt><dfn title=add()>add</dfn>({{FontFace}} font)
-		<dt><dfn title=has()>has</dfn>({{FontFace}} font)
-		<dt><dfn title=delete()>delete</dfn>({{FontFace}} font)
-		<dt><dfn title=entries()>entries</dfn>()
-		<dt><dfn title=keys()>keys</dfn>()
-		<dt><dfn title=values()>values</dfn>()
-		<dt><dfn title=forEach()>forEach</dfn>({{ForEachCallback}} cb, optional any thisArg)
-		<dd>
-			If {{add()}} or {{delete()}} are called
-			with an argument that is a <a>CSS-connected</a> {{FontFace}} object,
-			they must throw an InvalidModificationError exception.
-
-			All of these methods call the corresponding method of the {{FontFaceSet}}'s {{[[ContainedFonts]]}} slot
-			with the same arguments as were passed to them,
-			and return the value returned by the called method.
+			must iterate its {{initialFaces}} argument
+			and add each value to its <a>set entries</a>.
 
-		<dt><dfn title=clear()>clear</dfn>()
+		<dt><dfn>iteration order</dfn>
 		<dd>
-			This must remove all non-<a>CSS-connected</a> {{FontFace}} objects
-			from the {{FontFaceSet}}'s {{[[ContainedFonts]]}} slot.
+			When iterated over,
+			all <a>CSS-connected</a> {{FontFace}} objects must come first,
+			in document order of their connected ''@font-face'' rules,
+			followed by the non-<a>CSS-connected</a> {{FontFace}} objects,
+			in insertion order.
 
-		<dt><dfn iterator title="iterator">iterator behavior</dfn>
+		<dt><dfn>set entries</dfn>
 		<dd>
-			The <a spec=webidl>iterator behavior</a> is the iterator behavior of the {{FontFaceSet}}'s {{[[ContainedFonts]]}} slot.
+			If a {{FontFaceSet}} is a <a>font source</a>,
+			its <a spec=webidl for>set entries</a> are initialized as specified in [[#document-font-face-set]].
+
+			Otherwise, its <a spec=webidl for>set entries</a> are initially empty.
 	</dl>
 
 	{{FontFaceSet}} objects also have internal
 	<dfn attribute for=FontFaceSet>\[[LoadingFonts]]</dfn>,
 	<dfn attribute for=FontFaceSet>\[[LoadedFonts]]</dfn>,
 	and <dfn attribute for=FontFaceSet>\[[FailedFonts]]</dfn> slots,
-	all of which are initialized to the empty list,
-	a <dfn attribute for=FontFaceSet>\[[ReadyPromise]]</dfn> slot,
-	which is initialized to a fresh pending {{Promise}},
-	and a <dfn attribute for=FontFaceSet>\[[ContainedFonts]]</dfn> slot,
-	which is initialized by the <a constructor title="FontFaceSet()">FontFaceSet constructor</a> to a {{Set}} object
-	(though see [[#document-font-face-set]] for information on how the Set may be pre-filled
-	for {{FontFaceSet}} objects created by the user agent).
+	all of which are initialized to empty lists,
+	and a <dfn attribute for=FontFaceSet>\[[ReadyPromise]]</dfn> slot,
+	which is initialized to a fresh pending {{Promise}}.
 
 	Because font families are loaded only when they are used,
 	content sometimes needs to understand when the loading of fonts occurs.
@@ -976,9 +945,6 @@ Interaction with CSS’s ''@font-face'' Rule</h3>
 	As specified in [[#font-face-css-connection]], though,
 	the {{FontFace}} is no longer <a>CSS-connected</a> at that point.
 
-	All non-<a>CSS-connected</a> {{FontFace}} objects must be sorted after the <a>CSS-connected</a> ones,
-	in insertion order.
-
 	Note: It is expected that a future version of this specification
 	will define ways of interacting with and querying local fonts as well.