[e] (0) Try to be more explicit about what happens with parsing strin…

…gs into floats for out-of-range or over-precise values.

Fixing http://www.w3.org/Bugs/Public/show_bug.cgi?id=8047

git-svn-id: http://svn.whatwg.org/webapps@4331 340c8d12-0b0e-0410-8428-c7bf67bfef74

complete.html

@@ -5558,13 +5558,14 @@ <h4 id=reflecting-content-attributes-in-idl-attributes><span class=secno>2.7.1 <
   (<code>float</code>), then, on getting, the content attribute must
   be parsed according to the <a href=#rules-for-parsing-floating-point-number-values>rules for parsing floating point
   number values</a>, and if that is successful, and the value is in
-  the range of the IDL attribute's type, the resulting value must be
-  returned. If, on the other hand, it fails or returns an out of range
-  value, or if the attribute is absent, the default value must be
-  returned instead, or 0.0 if there is no default value. On setting,
-  the given value must be converted to the <a href=#best-representation-of-the-number-as-a-floating-point-number>best representation
-  of the number as a floating point number</a> and then that string
-  must be used as the new content attribute value.</p>
+  the range of the IDL attribute's type (excluding infinities), the
+  resulting value must be returned, truncating it if necessary. If, on
+  the other hand, it fails or returns an out of range value, or if the
+  attribute is absent, the default value must be returned instead, or
+  0.0 if there is no default value. On setting, the given value must
+  be converted to the <a href=#best-representation-of-the-number-as-a-floating-point-number>best representation of the number as a
+  floating point number</a> and then that string must be used as
+  the new content attribute value.</p>
 
   <p class=note>The values Infinity and Not-a-Number (NaN) values
   throw an exception on setting, as <a href=#float-nan>defined

index

@@ -5368,13 +5368,14 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
   (<code>float</code>), then, on getting, the content attribute must
   be parsed according to the <a href=#rules-for-parsing-floating-point-number-values>rules for parsing floating point
   number values</a>, and if that is successful, and the value is in
-  the range of the IDL attribute's type, the resulting value must be
-  returned. If, on the other hand, it fails or returns an out of range
-  value, or if the attribute is absent, the default value must be
-  returned instead, or 0.0 if there is no default value. On setting,
-  the given value must be converted to the <a href=#best-representation-of-the-number-as-a-floating-point-number>best representation
-  of the number as a floating point number</a> and then that string
-  must be used as the new content attribute value.</p>
+  the range of the IDL attribute's type (excluding infinities), the
+  resulting value must be returned, truncating it if necessary. If, on
+  the other hand, it fails or returns an out of range value, or if the
+  attribute is absent, the default value must be returned instead, or
+  0.0 if there is no default value. On setting, the given value must
+  be converted to the <a href=#best-representation-of-the-number-as-a-floating-point-number>best representation of the number as a
+  floating point number</a> and then that string must be used as
+  the new content attribute value.</p>
 
   <p class=note>The values Infinity and Not-a-Number (NaN) values
   throw an exception on setting, as <a href=#float-nan>defined

source

@@ -5075,13 +5075,14 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
   (<code>float</code>), then, on getting, the content attribute must
   be parsed according to the <span>rules for parsing floating point
   number values</span>, and if that is successful, and the value is in
-  the range of the IDL attribute's type, the resulting value must be
-  returned. If, on the other hand, it fails or returns an out of range
-  value, or if the attribute is absent, the default value must be
-  returned instead, or 0.0 if there is no default value. On setting,
-  the given value must be converted to the <span>best representation
-  of the number as a floating point number</span> and then that string
-  must be used as the new content attribute value.</p>
+  the range of the IDL attribute's type (excluding infinities), the
+  resulting value must be returned, truncating it if necessary. If, on
+  the other hand, it fails or returns an out of range value, or if the
+  attribute is absent, the default value must be returned instead, or
+  0.0 if there is no default value. On setting, the given value must
+  be converted to the <span>best representation of the number as a
+  floating point number</span> and then that string must be used as
+  the new content attribute value.</p>
 
   <p class="note">The values Infinity and Not-a-Number (NaN) values
   throw an exception on setting, as <a href="#float-nan">defined