Implement <select> parser “relaxation” — for “customizable” <select>

This change, in order to support the “customizable” <select> element:

  - “relaxes” parsing rules in <select> (to allow more elements as children)
  - adds the <selectedcontent> element for cloning selected <option> content

ElementName.java
----------------
  - Add <selectedcontent> element with TreeBuilder.SELECTEDCONTENT group

TreeBuilder.java
----------------
  - Add SELECTEDCONTENT group constant and IN_SELECT_IN_CONTENT mode
  - Track selectedContentPointer and activeOptionStackPos for cloning
  - Allow <div>, <span>, and other elements in <select> in “relaxed” mode
  - Deep clone <option> content to <selectedcontent> when <option> closes
  - Handle <selectedcontent> special-casing (store pointer, no stack push)

SAXTreeBuilder.java
-------------------
  - Implement clearSelectedContentChildren() for clearing before clone
  - Implement deepCloneChildren() and deepCloneNode() for <option> cloning

ParentNode.java
---------------
  - Add clearChildren() method, to support clearing <selectedcontent>

html5lib-tests submodule
------------------------
  - Updated to pull in corresponding tests for “relaxed” <select> parsing

Author: sideshowbarker

src/nu/validator/htmlparser/impl/ElementName.java

@@ -557,6 +557,8 @@ public void destructor() {
 //                return "ANNOTATION_XML";
 //            case TreeBuilder.FOREIGNOBJECT_OR_DESC:
 //                return "FOREIGNOBJECT_OR_DESC";
+//            case TreeBuilder.SELECTEDCONTENT:
+//                return "SELECTEDCONTENT";
 //        }
 //        return null;
 //    }
@@ -1424,7 +1426,11 @@ public void destructor() {
 public static final ElementName SELECT = new ElementName("select", "select",
 // CPPONLY: NS_NewHTMLSelectElement,
 // CPPONLY: NS_NewSVGUnknownElement,
-TreeBuilder.SELECT | SPECIAL);
+TreeBuilder.SELECT | SPECIAL | SCOPING);
+public static final ElementName SELECTEDCONTENT = new ElementName("selectedcontent", "selectedcontent",
+// CPPONLY: NS_NewHTMLElement,
+// CPPONLY: NS_NewSVGUnknownElement,
+TreeBuilder.SELECTEDCONTENT);
 public static final ElementName SLOT = new ElementName("slot", "slot",
 // CPPONLY: NS_NewHTMLSlotElement,
 // CPPONLY: NS_NewSVGUnknownElement,
@@ -1484,18 +1490,18 @@ public void destructor() {
 private final static @NoLength ElementName[] ELEMENT_NAMES = {
 FIGCAPTION,
 CITE,
-FRAMESET,
+FEOFFSET,
 H1,
 CLIPPATH,
 METER,
-RADIALGRADIENT,
+SELECT,
 B,
 BGSOUND,
 SOURCE,
 DL,
 RP,
-NOFRAMES,
-MTEXT,
+PROGRESS,
+NOSCRIPT,
 VIEW,
 DIV,
 G,
@@ -1507,10 +1513,10 @@ public void destructor() {
 ANIMATETRANSFORM,
 SECTION,
 HR,
-CANVAS,
-BASEFONT,
-FEDISTANTLIGHT,
-OUTPUT,
+DEFS,
+DATALIST,
+FONT,
+PLAINTEXT,
 TFOOT,
 FEMORPHOLOGY,
 COL,
@@ -1533,14 +1539,14 @@ public void destructor() {
 VIDEO,
 BR,
 FOOTER,
-TR,
-DETAILS,
-DT,
-FOREIGNOBJECT,
-FESPOTLIGHT,
-INPUT,
-RT,
-TT,
+ADDRESS,
+MS,
+APPLET,
+FIELDSET,
+FEPOINTLIGHT,
+LINEARGRADIENT,
+OBJECT,
+RECT,
 SLOT,
 MENU,
 FECONVOLVEMATRIX,
@@ -1585,23 +1591,23 @@ public void destructor() {
 ANIMATECOLOR,
 FECOMPONENTTRANSFER,
 HEADER,
-NOBR,
-ADDRESS,
-DEFS,
-MS,
-PROGRESS,
-APPLET,
-DATALIST,
-FIELDSET,
-FEOFFSET,
-FEPOINTLIGHT,
-FONT,
-LINEARGRADIENT,
-NOSCRIPT,
-OBJECT,
-PLAINTEXT,
-RECT,
-SELECT,
+TR,
+CANVAS,
+DETAILS,
+NOFRAMES,
+DT,
+BASEFONT,
+FOREIGNOBJECT,
+FRAMESET,
+FESPOTLIGHT,
+FEDISTANTLIGHT,
+INPUT,
+MTEXT,
+RT,
+OUTPUT,
+TT,
+RADIALGRADIENT,
+SELECTEDCONTENT,
 SCRIPT,
 TEXT,
 FEDROPSHADOW,
@@ -1689,22 +1695,23 @@ public void destructor() {
 FILTER,
 FEGAUSSIANBLUR,
 MARKER,
+NOBR,
 };
 private final static int[] ELEMENT_HASHES = {
 1900845386,
 1748359220,
-2001349720,
+2001349736,
 876609538,
 1798686984,
 1971465813,
-2007781534,
+2008125638,
 59768833,
 1730965751,
 1756474198,
 1864368130,
 1938817026,
-1988763672,
-2005324101,
+1990037800,
+2005719336,
 2060065124,
 52490899,
 62390273,
@@ -1716,10 +1723,10 @@ public void destructor() {
 1881498736,
 1907661127,
 1967128578,
-1982935782,
-1999397992,
-2001392798,
-2006329158,
+1983533124,
+2000525512,
+2001495140,
+2006896969,
 2008851557,
 2085266636,
 51961587,
@@ -1742,14 +1749,14 @@ public void destructor() {
 1925844629,
 1963982850,
 1967795958,
-1973420034,
-1983633431,
-1998585858,
-2001309869,
-2001392795,
-2003183333,
-2005925890,
-2006974466,
+1982173479,
+1986527234,
+1998724870,
+2001349704,
+2001392796,
+2004635806,
+2006028454,
+2007601444,
 2008325940,
 2021937364,
 2068523856,
@@ -1794,23 +1801,23 @@ public void destructor() {
 1965334268,
 1967788867,
 1968836118,
-1971938532,
-1982173479,
-1983533124,
-1986527234,
-1990037800,
-1998724870,
-2000525512,
-2001349704,
-2001349736,
-2001392796,
-2001495140,
-2004635806,
-2005719336,
-2006028454,
-2006896969,
-2007601444,
-2008125638,
+1973420034,
+1982935782,
+1983633431,
+1988763672,
+1998585858,
+1999397992,
+2001309869,
+2001349720,
+2001392795,
+2001392798,
+2003183333,
+2005324101,
+2005925890,
+2006329158,
+2006974466,
+2007781534,
+2008305999,
 2008340774,
 2008994116,
 2051837468,
@@ -1898,5 +1905,6 @@ public void destructor() {
 1967795910,
 1968053806,
 1971461414,
+1971938532,
 };
 }