Fix issues with number filtering for <input type="number">

DEVSIX-4198

Autoported commit.
Original commit hash: [696e9b58]

Author: Snipx

itext.tests/itext.html2pdf.tests/itext/html2pdf/attach/impl/tags/InputTagWorkerTest.cs

@@ -0,0 +1,51 @@
+/*
+This file is part of the iText (R) project.
+Copyright (c) 1998-2020 iText Group NV
+Authors: iText Software.
+
+This program is offered under a commercial and under the AGPL license.
+For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.
+
+AGPL licensing:
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+using iText.Html2pdf.Html;
+using iText.Test;
+
+namespace iText.Html2pdf.Attach.Impl.Tags {
+    public class InputTagWorkerTest : ExtendedITextTest {
+        [NUnit.Framework.Test]
+        public virtual void TestNumberInputPreprocessing() {
+            NUnit.Framework.Assert.AreEqual("", InputTagWorker.PreprocessInputValue("bear", AttributeConstants.NUMBER)
+                );
+            NUnit.Framework.Assert.AreEqual("4", InputTagWorker.PreprocessInputValue("4", AttributeConstants.NUMBER));
+            NUnit.Framework.Assert.AreEqual("04", InputTagWorker.PreprocessInputValue("04", AttributeConstants.NUMBER)
+                );
+            NUnit.Framework.Assert.AreEqual("", InputTagWorker.PreprocessInputValue("4.", AttributeConstants.NUMBER));
+            NUnit.Framework.Assert.AreEqual("", InputTagWorker.PreprocessInputValue(".", AttributeConstants.NUMBER));
+            NUnit.Framework.Assert.AreEqual(".9", InputTagWorker.PreprocessInputValue(".9", AttributeConstants.NUMBER)
+                );
+            NUnit.Framework.Assert.AreEqual("4.4", InputTagWorker.PreprocessInputValue("4.4", AttributeConstants.NUMBER
+                ));
+            NUnit.Framework.Assert.AreEqual("-4", InputTagWorker.PreprocessInputValue("-4", AttributeConstants.NUMBER)
+                );
+            NUnit.Framework.Assert.AreEqual("", InputTagWorker.PreprocessInputValue("", AttributeConstants.NUMBER));
+            NUnit.Framework.Assert.AreEqual("", InputTagWorker.PreprocessInputValue("-", AttributeConstants.NUMBER));
+            NUnit.Framework.Assert.AreEqual("-.9", InputTagWorker.PreprocessInputValue("-.9", AttributeConstants.NUMBER
+                ));
+            NUnit.Framework.Assert.AreEqual("", InputTagWorker.PreprocessInputValue("0-.9", AttributeConstants.NUMBER)
+                );
+        }
+    }
+}

itext/itext.html2pdf/itext/html2pdf/attach/impl/tags/InputTagWorker.cs

@@ -41,6 +41,7 @@ source product.
 address: [email protected]
 */
 using System;
+using System.Text.RegularExpressions;
 using Common.Logging;
 using iText.Html2pdf.Attach;
 using iText.Html2pdf.Attach.Impl.Layout;
@@ -60,6 +61,9 @@ namespace iText.Html2pdf.Attach.Impl.Tags {
     /// element.
     /// </summary>
     public class InputTagWorker : ITagWorker, IDisplayAware {
+        private static readonly Regex NUMBER_INPUT_ALLOWED_VALUES = iText.IO.Util.StringUtil.RegexCompile("^(((-?[0-9]+)(\\.[0-9]+)?)|(-?\\.[0-9]+))$"
+            );
+
         /// <summary>The form element.</summary>
         private IElement formElement;
 
@@ -190,8 +194,9 @@ public virtual IPropertyContainer GetElementResult() {
             return formElement;
         }
 
-        private static String PreprocessInputValue(String value, String inputType) {
-            if (AttributeConstants.NUMBER.Equals(inputType) && value != null && !value.Matches("[0-9.]*")) {
+        internal static String PreprocessInputValue(String value, String inputType) {
+            if (AttributeConstants.NUMBER.Equals(inputType) && value != null && !iText.IO.Util.StringUtil.Match(NUMBER_INPUT_ALLOWED_VALUES
+                , value).Success) {
                 value = "";
             }
             return value;

port-hash

@@ -1 +1 @@
-90ad4596fcb7988917ccd8c52bf6658bc48693bd
+696e9b5872fb5120ee80f337552ad78d21dc000c