POI Bug Github-672 XWPF: support removing style by pos and getting all XWPFStyle list

OpenXmlFormats/Wordprocessing/Styles.cs

@@ -140,6 +140,11 @@ public CT_DocDefaults AddNewDocDefaults()
             this.docDefaultsField = new CT_DocDefaults();
             return this.docDefaultsField;
         }
+
+        public void RemoveStyle(int pos)
+        {
+            this.styleField.RemoveAt(pos);
+        }
     }
 
 

ooxml/XWPF/Usermodel/XWPFStyles.cs

@@ -164,7 +164,27 @@ public void SetStyles(CT_Styles styles)
             }
 
         }
+        public CT_Styles GetCTStyles()
+        {
+            return ctStyles;
+        }
+
 
+        /// <summary>
+        /// remove the specified style if present
+        /// </summary>
+        /// <param name="pos"></param>
+        /// <returns></returns>
+        public bool RemoveStyle(int pos)
+        {
+            if(pos >= 0 && pos < NumberOfStyles)
+            {
+                listStyle.RemoveAt(pos);
+                ctStyles.RemoveStyle(pos);
+                return true;
+            }
+            return false;
+        }
         /**
          * Checks whether style with styleID exist
          * @param styleID		styleID of the Style in the style-Document
@@ -346,6 +366,11 @@ public XWPFStyle GetStyleWithSameName(XWPFStyle style)
 
         }
 
+        public List<XWPFStyle> GetStyles()
+        {
+            return listStyle;
+        }
+
         /**
          * Get the default style which applies text runs in the document
          */

testcases/ooxml/XWPF/UserModel/TestXWPFStyles.cs

@@ -236,5 +236,20 @@ public void TestMissingStyleId()
 
             doc.Close();
         }
+        [Test]
+        public void TestRemoveStyle()
+        {
+            using(XWPFDocument sampleDoc = XWPFTestDataSamples.OpenSampleDocument("Styles.docx"))
+            {
+                XWPFStyles styles = sampleDoc.GetStyles();
+                ClassicAssert.AreEqual(12, styles.GetStyles().Count);
+                XWPFStyle removedStyle = styles.GetStyle("Standard");
+                styles.RemoveStyle(styles.GetStyles().IndexOf(removedStyle));
+
+                XWPFDocument docIn = XWPFTestDataSamples.WriteOutAndReadBack(sampleDoc);
+                ClassicAssert.AreEqual(11, docIn.GetStyles().GetStyles().Count);
+                ClassicAssert.IsNull(docIn.GetStyles().GetStyle("Standard"));
+            }
+}
     }
 }