Tighten fetch integration, add shape support

Author: noamr

css-cascade-4/Overview.bs

@@ -281,10 +281,10 @@ Processing Stylesheet Imports</h3>
 			with stylesheet |parentStylesheet|, 
 			destination "style", 
 			CORS mode "no-cors",
-			and processResponse being the following steps given [=/response=] |response|:
+			and processResponse being the following steps given [=/response=] |response| and
+			byte stream, null or failure |byteStream|:
 
-			1. If |response| is a [=network error=] or its [=response/status=] is not an
-				[=ok status=], return.
+			1. If |maybeByteStream| is not a byte stream, return.
 
 			2. If |parentStylesheet| is in [=quirks mode=]
 				and |response| is [=CORS-same-origin=],
@@ -294,8 +294,8 @@ Processing Stylesheet Imports</h3>
 			3. If |content type| is not <code>"text/css"</code>,
 				return.
 
-			4. Let |importedStylesheet| be the result of [=Parse a stylesheet|parsing=] |response|'s
-			    [=response/body=]'s [=body/stream=] given |parsedUrl|.
+			4. Let |importedStylesheet| be the result of [=Parse a stylesheet|parsing=] |byteStram|
+			   given |parsedUrl|.
 
 			5. Set |importedStylesheet|'s <a spec=cssom>origin-clean flag</a> to
 				|parentStylesheet|'s <a spec=cssom>origin-clean flag</a>.

css-fonts-4/Overview.bs

@@ -2950,13 +2950,12 @@ Font fetching requirements</h4>
 	with stylesheet being |rule|'s <a spec=cssom for=CSSRule>parent CSS style sheet</a>, 
 	destination "font", 
 	CORS mode "cors",
-	and processResponse being the following steps given [=/response=] |res|:
+	and processResponse being the following steps given [=/response=] |res| and null, failure or a
+	byte stream |stream|:
 
-	1. Let |body| be |res|'s [=response/body=].
+	1. If |stream| is null, return.
 
-	1. If |body| is null, return.
-
-	1. ISSUE: Load a font from |body| according to its type.
+	2. ISSUE: Load a font from |stream| according to its type.
 </div>
 
 Note: The implications of this for authors are that fonts

css-shapes-2/Overview.bs

@@ -423,6 +423,27 @@ Shapes from Image</h3>
 	that determines the relevant pixels to use
 	(both for defining a shape and for display).
 
+<h2 id="fetching-external-shapes">
+Fetching external shapes</h2>
+
+	To <dfn>fetch an external resource for a shape</dfn>, either an SVG or an image, given a
+	{{CSSStyleRule}} |rule|:
+	1. Let |parsedUrl| be the result of the [=URL parser=] steps with |rule|'s URL and |rule|'s
+		|parentStylesheet|'s <a spec=cssom>location</a>.
+		If the algorithm returns an error,
+		return. [[CSSOM]]
+
+	2. [=Fetch a style resource=] given |parsedUrl|,
+		with stylesheet being |rule|'s <a spec=cssom for=CSSRule>parent CSS style sheet</a>,
+		destination "image",
+		CORS mode "cors",
+		and processResponse being the following steps given [=/response=] |res| and null, failure or
+		a byte stream |byteStream|:
+			If |byteStream| is a byte stream,
+			apply the image or SVG to the appropriate shape-accepting property.
+
+		Note: shapes require CORS mode as their effect is detected by the document.
+
 
 <h2 id="shapes-from-box-values">
 Shapes from Box Values</h2>

css-values-4/Overview.bs

@@ -997,7 +997,8 @@ URL processing model</h4>
 		given a {{CSSStyleSheet}} |sheet|, 
 		a string |destination| matching a {{RequestDestination}}, 
 		a "no-cors" or "cors" |corsMode|, 
-		and an algorithm |processResponse| accepting a [=/response=]:
+		and an algorithm |processResponse| accepting a [=/response=] and a null, failure or byte
+		stream:
 
 		1. Let |environmentSettings| be |sheet|'s [=relevant settings object=].
 
@@ -1009,29 +1010,32 @@ URL processing model</h4>
 
 		5. Let |referrer| be |documentBase|.
 
-		6. If |base| is null, set |base| to |documentBase|.
+		6. Let |handleResourceFetchDone| be to do nothing.
 
-		7. Let |parsedUrl| be the result of the [=URL parser=] steps with |url| and |base|.
+		7. If |base| is null, set |base| to |documentBase|.
+
+		8. Let |parsedUrl| be the result of the [=URL parser=] steps with |url| and |base|.
 			If the algorithm returns an error, return.
 
-		8. If |corsMode| is "cors", set |referrer| to |sheet|'s
+		9. If |corsMode| is "cors", set |referrer| to |sheet|'s
 			<a spec=cssom>location</a>. [[CSSOM]]
 
-		9. Let |req| be a new [=/request=] whose [=request/url=] is |parsedUrl|, whose
+		10. Let |req| be a new [=/request=] whose [=request/url=] is |parsedUrl|, whose
 			[=request/destination=] is |destination|, [=request/mode=] is |mode|, [=request/origin=]
 			is |environmentSettings|'s [=environment settings object/origin=],
 			[=request/credentials mode=] is "same-origin", [=request/use-url-credentials flag=] is
 			set, and whose [=request/header list=] is a [=/header list=] containing a [=header=]
 			with its [=header/name=] set to "referrer" and its [=header/value=] set to |referrer|.
 
-		10. [=/Fetch=] |req|, with |taskDestination| set to |global|, and |processResponse| set to
-			the following steps given [=/response=] |res|:
-
-			1. If |sheet|'s <a spec=cssom>origin-clean flag</a> is set, set |handleResourceFetchDone|
-				given [=/response=] |res| to [=finalize and report timing=] with |res|, |global|, and
+		11. [=/Fetch=] |req|, with |taskDestination| set to |global|, and |processResponseEndOfBody|
+			set to the following steps given [=/response=] |res| and Null, failure or byte stream
+			|byteStream|:
+			1. If |sheet|'s <a spec=cssom>origin-clean flag</a> is set,
+				[=finalize and report timing=] with |res|, |global|, and
 				<code>"css"</code>. [[CSSOM]]
 
-			2. Call |processResponseDone| with |res|.
+			2. Call |processResponse| with |res| and |byteStream|.
+
 	</div>
 
 <h2 id="numeric-types">