[mv3] Fix conversion of `:xpath` procedural filters

Procedural filters with `:xpath` operator were silently rejected
at conversion time because the parser was failing to evaluate the
xpath expression due to the absence of a `document` object in
nodejs.

If `document` object is not present, the parser will assume the
xpath expression is valid.

platform/mv3/extension/js/scripting/css-procedural.js

@@ -566,6 +566,13 @@ class PSelectorRoot extends PSelector {
         }
         return [];
     }
+    exec(input) {
+        try {
+            return super.exec(input);
+        } catch (ex) {
+        }
+        return [];
+    }
 }
 
 /******************************************************************************/

src/js/static-dnr-filtering.js

@@ -299,10 +299,10 @@ function addToDNR(context, list) {
 
         if ( parser.isComment() ) {
             if ( line === `!#trusted on ${context.secret}` ) {
-                parser.trustedSource = true;
+                parser.options.trustedSource = true;
                 context.trustedSource = true;
             } else if ( line === `!#trusted off ${context.secret}` ) {
-                parser.trustedSource = false;
+                parser.options.trustedSource = false;
                 context.trustedSource = false;
             }
             continue;
@@ -312,6 +312,8 @@ function addToDNR(context, list) {
         if ( parser.hasError() ) {
             if ( parser.astError === sfp.AST_ERROR_OPTION_EXCLUDED ) {
                 context.invalid.add(`Incompatible with DNR: ${line}`);
+            } else {
+                context.invalid.add(`Rejected filter: ${line}`);
             }
             continue;
         }

src/js/static-filtering-parser.js

@@ -4022,6 +4022,7 @@ class ExtSelectorCompiler {
     compileXpathExpression(s) {
         const r = this.unquoteString(s);
         if ( r.i !== s.length ) { return; }
+        if ( globalThis.document instanceof Object === false ) { return r.s; }
         try {
             globalThis.document.createExpression(r.s, null);
         } catch (e) {

src/js/static-net-filtering.js

@@ -4571,7 +4571,7 @@ FilterContainer.prototype.dnrFromCompiled = function(op, context, ...args) {
             }
             break;
         case 'uritransform': {
-            dnrAddRuleError(rule, `Unsupported uritransform=${rule.__modifierValue}`);
+            dnrAddRuleError(rule, `Incompatible with DNR: uritransform=${rule.__modifierValue}`);
             break;
         }
         default: