Fix dart warnings

Author: scribetw

lib/src/c14n_canonicalization.dart

@@ -165,7 +165,7 @@ class C14nCanonicalization implements CanonicalizationAlgorithm<String> {
     }
 
     if (xmlData.contains(node.nodeType)) {
-      return encodeSpecialCharactersInText(node.text);
+      return encodeSpecialCharactersInText(node.value ?? '');
     }
 
     if (node is XmlElement) {
@@ -222,7 +222,7 @@ class C14nCanonicalization implements CanonicalizationAlgorithm<String> {
       }
     }
 
-    return '${isAfterDocument ? '\n' : ''}<!--${encodeSpecialCharactersInText(node.text)}-->${isBeforeDocument ? '\n' : ''}';
+    return '${isAfterDocument ? '\n' : ''}<!--${encodeSpecialCharactersInText(node.value ?? '')}-->${isBeforeDocument ? '\n' : ''}';
   }
 
   @override

lib/src/enveloped_signature.dart

@@ -32,7 +32,7 @@ class EnvelopedSignature implements CanonicalizationAlgorithm<XmlNode> {
     assert(signatureNode is XmlElement);
     final expectedSignatureValue = findFirst(signatureNode as XmlElement,
             ".//*[local-name()='SignatureValue']/text()")
-        .text;
+        .innerText;
     final signatures = XmlXPath.node(node).query(
         './/*[local-name()="Signature"]'); // FIXME: namespace-uri() not supported
     // .query('.//*[local-name()="Signature" and namespace-uri()="http://www.w3.org/2000/09/xmldsig#"]');
@@ -41,7 +41,7 @@ class EnvelopedSignature implements CanonicalizationAlgorithm<XmlNode> {
       assert(child is XmlElement);
       final signatureValue = findFirst(
               child as XmlElement, ".//*[local-name()='SignatureValue']/text()")
-          .text;
+          .innerText;
       if (expectedSignatureValue == signatureValue) {
         child.parent?.children.remove(child);
       }

lib/src/exclusive_canonicalization.dart

@@ -99,7 +99,7 @@ class ExclusiveCanonicalization extends C14nCanonicalization {
     }
 
     if (xmlData.contains(node.nodeType)) {
-      return encodeSpecialCharactersInText(node.text);
+      return encodeSpecialCharactersInText(node.value ?? '');
     }
 
     if (node is XmlElement) {

lib/src/signed_xml.dart

@@ -413,7 +413,7 @@ class SignedXml {
 
     signatureValue =
         findFirst(signatureNode, ".//*[local-name()='SignatureValue']/text()")
-            .text
+            .innerText
             .replaceAll(RegExp(r'\r?\n'), '');
     keyInfo = XmlXPath.node(signatureNode)
         .query(".//*[local-name()='KeyInfo']")
@@ -441,11 +441,11 @@ class SignedXml {
       throw ArgumentError('could not find DigestValue in reference $ref');
     }
     if (nodes.first.firstChild == null ||
-        (nodes.first.firstChild?.text ?? '') == '') {
+        (nodes.first.firstChild?.value ?? '') == '') {
       throw ArgumentError(
           'could not find the value of DigestValue in ${nodes.first}');
     }
-    final digestValue = nodes.first.firstChild!.text;
+    final digestValue = nodes.first.firstChild!.value;
 
     final transforms = <String>[];
     String? inclusiveNamespacesPrefixList;

test/signature_test.dart

@@ -924,7 +924,7 @@ void passLoadSignature(String file, [bool toString = false]) {
 
   final doc2 = parseFromString(sig.keyInfo!);
   final keyInfo = XmlXPath.node(doc2).query("//*[local-name()='KeyInfo']/*[local-name()='dummyKey']").node!.node;
-  expect(keyInfo.firstChild?.text, '1234', reason: 'keyInfo clause not correctly loaded');
+  expect(keyInfo.firstChild?.value, '1234', reason: 'keyInfo clause not correctly loaded');
   expect(sig.references.length, 3);
 
   final digests = ['b5GCZ2xpP5T7tbLWBTkOl4CYupQ=', 'K4dI497ZCxzweDIrbndUSmtoezY=', 'sH1gxKve8wlU8LlFVa2l6w3HMJ0='];