Initial add of span parent field in interface for span elements that …

…can be nested (issue #3 e/f)

flat/style/flat.editor.js

@@ -501,6 +501,18 @@ function applysuggestion(e,i) {
     }
 }
 
+function renderparentspanfield(index, annotation, nestableparents) {
+    //This is a nestable span element
+    var s = "<div class=\"spanparenteditor\">Parent span: " + 
+            "<select name=\"spanparent" + index + "\">" + 
+            "<option value=\"\">(none/root)</option>";
+    for (var i = 0; i < nestableparents; i++) {
+        //TODO: collect possibilities
+    }
+    s = s + "</div>";
+    return s;
+}
+
 
 function showeditor(element) {
     /* show and populate the editor for a particular element */
@@ -672,6 +684,13 @@ function showeditor(element) {
                     ho_result = renderhigherorderfields(editfields, annotation);
                     s  = s + ho_result.output;
 
+
+                    var nestablespan = folia_nestablespan(annotation.type);
+                    if (nestablespan.length > 0) {
+                        s = s + renderparentspanfield(editfields, annotation, nestablespan);
+
+                    }
+
                     s = s + "</td></tr>";
 
                     //Set up the data structure for this annotation input, changes in the forms will be reflected back into this (all items are pushed to the editdata list)

flat/style/folia.js

@@ -8,6 +8,10 @@ var foliaelements = {};
 //Maps FoLiA XML tag to element classes, FLAT works tag-based
 var foliatag2class = {};
 
+//Maps span elements (tags) to parent span elements in which they can be
+//nested, hard coded for now.. TODO: derive from spec
+var folianestablespan = {'su': ['su'], 'semrole': ['predicate'] };
+
 //element classes are internal class names for the FoLiA elements and not to be confused with FoLiA's notion of a class.
 
 function folia_parse(element, ancestors) {
@@ -111,6 +115,15 @@ function folia_isspanrole(tag) {
     return false;
 }
 
+function folia_nestablespan(tag) {
+    //Is this span element nestable in another span element?
+    //Returns a list of possible parents
+    if (folianestablespan[tag] !== undefined) {
+        return folianestablespan[tag];
+    } else {
+        return [];
+    }
+}
 
 function folia_isstructure(tag) {
     //Is the element a first order span element?