Node identity and parentage are XPath, not DOM calls

src/annotate.xsl

@@ -85,11 +85,10 @@ version="3.0">
     <xsl:function name="rdfae:selection-valid" as="xs:boolean">
         <xsl:param name="range"/>
 
-        <xsl:variable name="start" select="ixsl:get($range, 'startContainer')"/>
-        <xsl:variable name="end" select="ixsl:get($range, 'endContainer')"/>
-        <xsl:sequence select="ixsl:call($start, 'isSameNode', [ $end ])
-            or (ixsl:get($start, 'nodeType') = 3 and ixsl:get($end, 'nodeType') = 3
-                and ixsl:call(ixsl:get($start, 'parentNode'), 'isSameNode', [ ixsl:get($end, 'parentNode') ]))"/>
+        <xsl:variable name="start" select="ixsl:get($range, 'startContainer')" as="node()?"/>
+        <xsl:variable name="end" select="ixsl:get($range, 'endContainer')" as="node()?"/>
+        <xsl:sequence select="$start is $end
+            or ($start instance of text() and $end instance of text() and $start/.. is $end/..)"/>
     </xsl:function>
 
     <!-- the single write path for RDFa attributes, shared by create and edit. No modes:
@@ -187,7 +186,7 @@ version="3.0">
     <xsl:template name="rdfae:unwrap-element">
         <xsl:param name="element" as="element()"/>
 
-        <xsl:variable name="parent" select="ixsl:get($element, 'parentNode')"/>
+        <xsl:variable name="parent" select="$element/.." as="node()"/>
         <xsl:for-each select="1 to xs:integer(ixsl:get($element, 'childNodes.length'))">
             <xsl:sequence select="ixsl:call($parent, 'insertBefore', [ ixsl:get($element, 'firstChild'), $element ])[current-date() lt xs:date('2000-01-01')]"/>
         </xsl:for-each>
@@ -351,7 +350,8 @@ version="3.0">
 
     <!-- clicking the backdrop (not the content) closes the modal -->
     <xsl:template match="div[@id = 'output-modal']" mode="ixsl:onclick">
-        <xsl:if test="ixsl:call(ixsl:get(ixsl:event(), 'target'), 'isSameNode', [ . ])">
+        <xsl:variable name="target" select="ixsl:get(ixsl:event(), 'target')" as="node()?"/>
+        <xsl:if test="$target is .">
             <ixsl:set-style name="display" select="'none'"/>
         </xsl:if>
     </xsl:template>

src/edit.xsl

@@ -896,7 +896,8 @@ version="3.0">
         <xsl:variable name="key" as="xs:string" select="string(ixsl:get($event, 'key'))"/>
         <xsl:variable name="chord" as="xs:boolean"
             select="(ixsl:get($event, 'ctrlKey') or ixsl:get($event, 'metaKey')) and not(ixsl:get($event, 'altKey'))"/>
-        <xsl:if test="ixsl:call(ixsl:get($event, 'target'), 'isSameNode', [ . ])">
+        <xsl:variable name="target" select="ixsl:get($event, 'target')" as="node()?"/>
+        <xsl:if test="$target is .">
             <xsl:choose>
                 <xsl:when test="$chord and lower-case($key) = 'z' and not(ixsl:get($event, 'shiftKey'))">
                     <xsl:sequence select="ixsl:call($event, 'preventDefault', [])[current-date() lt xs:date('2000-01-01')]"/>
@@ -1193,7 +1194,7 @@ version="3.0">
 
         <xsl:sequence select="ixsl:call($range, 'insertNode', [ $node ])[current-date() lt xs:date('2000-01-01')]"/>
         <xsl:call-template name="rdfae:place-caret">
-            <xsl:with-param name="node" select="ixsl:get($node, 'parentNode')"/>
+            <xsl:with-param name="node" select="$node/.."/>
             <xsl:with-param name="offset" select="count($node/preceding-sibling::node()) + 1"/>
         </xsl:call-template>
     </xsl:template>
@@ -1710,7 +1711,7 @@ version="3.0">
                 <xsl:sequence select="ixsl:call($range, 'insertNode', [ $fragment ])[current-date() lt xs:date('2000-01-01')]"/>
                 <xsl:for-each select="$last">
                     <xsl:call-template name="rdfae:place-caret">
-                        <xsl:with-param name="node" select="ixsl:get(., 'parentNode')"/>
+                        <xsl:with-param name="node" select=".."/>
                         <xsl:with-param name="offset" select="count(preceding-sibling::node()) + 1"/>
                     </xsl:call-template>
                 </xsl:for-each>

src/index.xsl

@@ -60,7 +60,7 @@ version="3.0">
          LinkedDataHub's window.LinkedDataHub); reached everywhere via rdfae:editor-state().
          Hosts with their own initial template call this from there instead of main -->
     <xsl:template name="rdfae:init-state">
-        <xsl:variable name="state" select="ixsl:call(ixsl:window(), 'Object', [])"/>
+        <xsl:variable name="state" select="ixsl:new('Object', [])"/>
         <ixsl:set-property name="rdfaEditor" select="$state" object="ixsl:window()"/>
         <xsl:for-each select="('editingSpan', 'range', 'activeBlock', 'draggedBlock',
                 'editRange', 'editingLink', 'insertHost', 'lastUndoHost',

src/navigate.xsl

@@ -613,7 +613,7 @@ version="3.0">
                             <xsl:sequence select="ixsl:call(rdfae:selection(),
                                 'setBaseAndExtent', [ $node, $position - 1, $node,
                                     $position - 1 + string-length($query) ])[current-date() lt xs:date('2000-01-01')]"/>
-                            <xsl:sequence select="ixsl:call(ixsl:get($node, 'parentElement'), 'scrollIntoView',
+                            <xsl:sequence select="ixsl:call($node/parent::*, 'scrollIntoView',
                                 [ map{ 'block': 'center' } ])[current-date() lt xs:date('2000-01-01')]"/>
                             <ixsl:set-property name="findNode" select="$node" object="rdfae:editor-state()"/>
                             <ixsl:set-property name="findOffset"

src/typeahead.xsl

@@ -321,9 +321,7 @@ version="3.0">
                 </xsl:for-each>
                 <xsl:for-each select="$items[$next]">
                     <ixsl:set-attribute name="aria-selected" select="'true'"/>
-                    <xsl:variable name="opts" select="ixsl:call(ixsl:window(), 'Object', [])"/>
-                    <ixsl:set-property name="block" select="'nearest'" object="$opts"/>
-                    <xsl:sequence select="ixsl:call(., 'scrollIntoView', [ $opts ])[current-date() lt xs:date('2000-01-01')]"/>
+                    <xsl:sequence select="ixsl:call(., 'scrollIntoView', [ map{ 'block': 'nearest' } ])[current-date() lt xs:date('2000-01-01')]"/>
                 </xsl:for-each>
             </xsl:when>
             <xsl:otherwise/>