make everything internal which does not need to be public

src/UglyToad.Pdf/Content/Catalog.cs

@@ -4,7 +4,7 @@
     using ContentStream;
     using Cos;
 
-    public class Catalog
+    internal class Catalog
     {
         private readonly PdfDictionary catalogDictionary;
 

src/UglyToad.Pdf/Content/Pages.cs

@@ -10,7 +10,7 @@
     using Logging;
     using Parser;
 
-    public class Pages
+    internal class Pages
     {
         private readonly ILog log;
         private readonly Catalog catalog;

src/UglyToad.Pdf/ContentStream/PdfDictionary.cs

@@ -7,7 +7,7 @@
     using Cos;
     using Util.JetBrains.Annotations;
 
-    public class PdfDictionary : CosBase, IReadOnlyDictionary<CosName, CosBase>
+    internal class PdfDictionary : CosBase, IReadOnlyDictionary<CosName, CosBase>
     {
         private readonly Dictionary<CosName, CosBase> inner = new Dictionary<CosName, CosBase>();
 

src/UglyToad.Pdf/ContentStream/TypedAccessors/DictionaryValueAccessorExtensions.cs

@@ -2,10 +2,9 @@
 {
     using System.Collections.Generic;
     using Cos;
-    using Util;
     using Util.JetBrains.Annotations;
 
-    public static class DictionaryValueAccessorExtensions
+    internal static class DictionaryValueAccessorExtensions
     {
         public static long GetLongOrDefault(this PdfDictionary dictionary, CosName key)
         {

src/UglyToad.Pdf/ContentStream/TypedAccessors/DictionaryValueSetterExtensions.cs

@@ -2,7 +2,7 @@
 {
     using Cos;
 
-    public static class DictionaryValueSetterExtensions
+    internal static class DictionaryValueSetterExtensions
     {
         public static void SetLong(this PdfDictionary dictionary, CosName key, long value)
         {

src/UglyToad.Pdf/Cos/COSDocument.cs

@@ -1,440 +0,0 @@
-namespace UglyToad.Pdf.Cos
-{
-    using System;
-    using System.Collections.Generic;
-    using System.Linq;
-    using IO;
-    using Parser;
-    using Parser.Parts;
-
-    /*
-  * Licensed to the Apache Software Foundation (ASF) under one or more
-  * contributor license agreements.  See the NOTICE file distributed with
-  * this work for additional information regarding copyright ownership.
-  * The ASF licenses this file to You under the Apache License, Version 2.0
-  * (the "License"); you may not use this file except in compliance with
-  * the License.  You may obtain a copy of the License at
-  *
-  *      http://www.apache.org/licenses/LICENSE-2.0
-  *
-  * Unless required by applicable law or agreed to in writing, software
-  * distributed under the License is distributed on an "AS IS" BASIS,
-  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  * See the License for the specific language governing permissions and
-  * limitations under the License.
-  */
-
-    /**
-     * This is the in-memory representation of the PDF document.  You need to call
-     * close() on this object when you are done using it!!
-     *
-     * @author Ben Litchfield
-     * 
-     */
-    public class COSDocument : CosBase, IDisposable
-    {
-        private float version = 1.4f;
-
-        /**
-         * Maps ObjectKeys to a COSObject. Note that references to these objects
-         * are also stored in COSDictionary objects that map a name to a specific object.
-         */
-        private readonly Dictionary<CosObjectKey, CosObject> objectPool = new Dictionary<CosObjectKey, CosObject>();
-
-        /**
-         * Maps object and generation id to object byte offsets.
-         */
-        private readonly Dictionary<CosObjectKey, long> xrefTable = new Dictionary<CosObjectKey, long>();
-        
-        /**
-         * Document trailer dictionary.
-         */
-        public CosDictionary trailer;
-
-        private bool warnMissingClose = true;
-
-        /** 
-         * Signal that document is already decrypted. 
-         */
-
-        private bool closed = false;
-        
-        /**
-         * This will get the first dictionary object by type.
-         *
-         * @param type The type of the object.
-         *
-         * @return This will return an object with the specified type.
-         * @throws IOException If there is an error getting the object
-         */
-        public CosObject getObjectByType(CosName type)
-        {
-            foreach (CosObject obj in objectPool.Values)
-            {
-                var realObject = obj.GetObject();
-                if (realObject is CosDictionary dic)
-                {
-                    try
-                    {
-                        var typeItem = dic.getItem(CosName.TYPE);
-                        if (typeItem is CosName objectType)
-                        {
-                            if (objectType.Equals(type))
-                            {
-                                return obj;
-                            }
-                        }
-                        else if (typeItem != null)
-                        {
-                            //LOG.debug("Expected a /Name object after /Type, got '" + typeItem + "' instead");
-                        }
-                    }
-                    catch (InvalidCastException e)
-                    {
-                        //LOG.warn(e, e);
-                    }
-                }
-            }
-            return null;
-        }
-
-        /**
-         * This will get all dictionary objects by type.
-         *
-         * @param type The type of the object.
-         *
-         * @return This will return an object with the specified type.
-         * @throws IOException If there is an error getting the object
-         */
-        public List<CosObject> getObjectsByType(String type)
-        {
-            return getObjectsByType(CosName.Create(type));
-        }
-
-        /**
-         * This will get a dictionary object by type.
-         *
-         * @param type The type of the object.
-         *
-         * @return This will return an object with the specified type.
-         * @throws IOException If there is an error getting the object
-         */
-        public List<CosObject> getObjectsByType(CosName type)
-        {
-            var retval = new List<CosObject>();
-            foreach (var obj in objectPool.Values)
-            {
-                var realObject = obj.GetObject();
-                if (realObject is CosDictionary dic)
-                {
-                    try
-                    {
-                        var typeItem = dic.getItem(CosName.TYPE);
-                        if (typeItem is CosName objectType)
-                        {
-                            if (objectType.Equals(type))
-                            {
-                                retval.Add(obj);
-                            }
-                        }
-                        else if (typeItem != null)
-                        {
-                            //LOG.debug("Expected a /Name object after /Type, got '" + typeItem + "' instead");
-                        }
-                    }
-                    catch (InvalidCastException e)
-                    {
-                        //LOG.warn(e, e);
-                    }
-                }
-            }
-            return retval;
-        }
-
-        /**
-         * Returns the CosObjectKey for a given COS object, or null if there is none.
-         * This lookup iterates over all objects in a PDF, which may be slow for large files.
-         * 
-         * @param object COS object
-         * @return key
-         */
-        public CosObjectKey getKey(CosBase obj)
-        {
-            foreach (var entry in objectPool)
-            {
-                if (entry.Value.GetObject() == obj)
-                {
-                    return entry.Key;
-                }
-            }
-
-            return null;
-        }
-
-        /**
-         * This will print contents to stdout.
-         */
-        public void print()
-        {
-            foreach (CosObject obj in objectPool.Values)
-            {
-                Console.WriteLine(obj);
-            }
-        }
-
-        public decimal Version { get; set; }
-        
-
-        public bool IsDecrypted { get; set; }
-        /**
-         * This will tell if this is an encrypted document.
-         *
-         * @return true If this document is encrypted.
-         */
-        public bool isEncrypted()
-        {
-            var encrypted = false;
-            if (trailer != null)
-            {
-                encrypted = trailer.getDictionaryObject(CosName.ENCRYPT) != null;
-            }
-            return encrypted;
-        }
-
-        /**
-         * This will get the encryption dictionary if the document is encrypted or null
-         * if the document is not encrypted.
-         *
-         * @return The encryption dictionary.
-         */
-        public CosDictionary getEncryptionDictionary()
-        {
-            return (CosDictionary)trailer.getDictionaryObject(CosName.ENCRYPT);
-        }
-
-        /**
-         * This will set the encryption dictionary, this should only be called when
-         * encrypting the document.
-         *
-         * @param encDictionary The encryption dictionary.
-         */
-        public void setEncryptionDictionary(CosDictionary encDictionary)
-        {
-            trailer.setItem(CosName.ENCRYPT, encDictionary);
-        }
-
-        /**
-         * This will get the document ID.
-         *
-         * @return The document id.
-         */
-        public COSArray getDocumentID()
-        {
-            return (COSArray)getTrailer().getDictionaryObject(CosName.ID);
-        }
-
-        /**
-         * This will set the document ID.
-         *
-         * @param id The document id.
-         */
-        public void setDocumentID(COSArray id)
-        {
-            getTrailer().setItem(CosName.ID, id);
-        }
-
-        /**
-         * This will get the document catalog.
-         *
-         * @return @return The catalog is the root of the document; never null.
-         *
-         * @throws IOException If no catalog can be found.
-         */
-        public CosObject getCatalog()
-        {
-            CosObject catalog = getObjectByType(CosName.CATALOG);
-            if (catalog == null)
-            {
-                throw new InvalidOperationException("Catalog cannot be found");
-            }
-            return catalog;
-        }
-
-        /**
-         * This will get a list of all available objects.
-         *
-         * @return A list of all objects, never null.
-         */
-        public List<CosObject> getObjects()
-        {
-            return objectPool.Values.ToList();
-        }
-
-        /**
-         * This will get the document trailer.
-         *
-         * @return the document trailer dict
-         */
-        public CosDictionary getTrailer()
-        {
-            return trailer;
-        }
-
-        /**
-         * // MIT added, maybe this should not be supported as trailer is a persistence construct.
-         * This will set the document trailer.
-         *
-         * @param newTrailer the document trailer dictionary
-         */
-        public void setTrailer(CosDictionary newTrailer)
-        {
-            trailer = newTrailer;
-        }
-
-        /**
-         * visitor pattern double dispatch method.
-         *
-         * @param visitor The object to notify when visiting this object.
-         * @return any object, depending on the visitor implementation, or null
-         * @throws IOException If an error occurs while visiting this object.
-         */
-        public override object Accept(ICosVisitor visitor)
-        {
-            return visitor.VisitFromDocument(this);
-        }
-
-        /**
-         * This will close all storage and delete the tmp files.
-         *
-         *  @throws IOException If there is an error close resources.
-         */
-        public void Dispose()
-        {
-            if (!closed)
-            {
-                // close all open I/O streams
-                foreach (CosObject obj in getObjects())
-                {
-                    CosBase cosObject = obj.GetObject();
-                }
-                closed = true;
-            }
-        }
-
-        /**
-         * Returns true if this document has been closed.
-         */
-        public bool isClosed()
-        {
-            return closed;
-        }
-
-        /**
-         * Warn the user in the finalizer if he didn't close the PDF document. The method also
-         * closes the document just in case, to avoid abandoned temporary files. It's still a good
-         * idea for the user to close the PDF document at the earliest possible to conserve resources.
-         * @throws IOException if an error occurs while closing the temporary files
-         */
-        ~COSDocument()
-        {
-            if (!closed)
-            {
-                if (warnMissingClose)
-                {
-                    //LOG.warn("Warning: You did not close a PDF Document");
-                }
-                Dispose();
-            }
-        }
-
-        /**
-         * Controls whether this instance shall issue a warning if the PDF document wasn't closed
-         * properly through a call to the {@link #close()} method. If the PDF document is held in
-         * a cache governed by soft references it is impossible to reliably close the document
-         * before the warning is raised. By default, the warning is enabled.
-         * @param warn true enables the warning, false disables it.
-         */
-        public void setWarnMissingClose(bool warn)
-        {
-            this.warnMissingClose = warn;
-        }
-
-        /**
-         * This will get an object from the pool.
-         *
-         * @param key The object key.
-         *
-         * @return The object in the pool or a new one if it has not been parsed yet.
-         *
-         * @throws IOException If there is an error getting the proxy object.
-         */
-        public CosObject getObjectFromPool(CosObjectKey key)
-        {
-            if (key != null)
-            {
-                if (objectPool.TryGetValue(key, out var value))
-                {
-                    return value;
-                }
-            }
-
-            // this was a forward reference, make "proxy" object
-            var obj = new CosObject(null);
-            if (key != null)
-            {
-                obj.SetObjectNumber(key.Number);
-                obj.SetGenerationNumber((int)key.Generation);
-                objectPool[key] = obj;
-            }
-
-            return obj;
-        }
-
-        /**
-         * Removes an object from the object pool.
-         * @param key the object key
-         * @return the object that was removed or null if the object was not found
-         */
-        public CosObject removeObject(CosObjectKey key)
-        {
-            if (!objectPool.TryGetValue(key, out CosObject result))
-            {
-                return null;
-            }
-
-            objectPool.Remove(key);
-
-            return result;
-        }
-
-        /**
-         * Populate XRef HashMap with given values.
-         * Each entry maps ObjectKeys to byte offsets in the file.
-         * @param xrefTableValues  xref table entries to be added
-         */
-        public void addXRefTable(Dictionary<CosObjectKey, long> xrefTableValues)
-        {
-            foreach (var value in xrefTableValues)
-            {
-                xrefTable[value.Key] = value.Value;
-            }
-        }
-
-        /**
-         * Returns the xrefTable which is a mapping of ObjectKeys
-         * to byte offsets in the file.
-         * @return mapping of ObjectsKeys to byte offsets
-         */
-        public Dictionary<CosObjectKey, long> getXrefTable()
-        {
-            return xrefTable;
-        }
-
-
-        public long StartXRef { get; set; }
-
-        public bool IsXRefStream { get; set; }
-
-    }
-
-}

src/UglyToad.Pdf/Cos/CosArray.cs

@@ -25,7 +25,8 @@ namespace UglyToad.Pdf.Cos
     using System;
     using System.Collections;
     using System.Collections.Generic;
-    public class COSArray : CosBase, IEnumerable<CosBase>, ICosUpdateInfo
+
+    internal class COSArray : CosBase, IEnumerable<CosBase>, ICosUpdateInfo
     {
         private readonly List<CosBase> objects = new List<CosBase>();
         public bool NeedsToBeUpdated { get; set; }

src/UglyToad.Pdf/Cos/CosBase.cs

@@ -1,10 +1,6 @@
-using System;
+namespace UglyToad.Pdf.Cos
-using System.Collections.Generic;
-using System.Text;
-
-namespace UglyToad.Pdf.Cos
 {
-    public abstract class CosBase : ICosObject
+    internal abstract class CosBase : ICosObject
     {
         public bool Direct { get; set; }
 
@@ -16,7 +12,7 @@ namespace UglyToad.Pdf.Cos
         public abstract object Accept(ICosVisitor visitor);
     }
 
-    public interface ICosObject
+    internal interface ICosObject
     {
         CosBase GetCosObject();
     }

src/UglyToad.Pdf/Cos/CosBoolean.cs

@@ -3,7 +3,7 @@
     using System.IO;
     using Core;
 
-    public class CosBoolean : CosBase, ICosStreamWriter
+    internal class CosBoolean : CosBase, ICosStreamWriter
     {
         /**
      * The true boolean token.

src/UglyToad.Pdf/Cos/CosDictionary.cs

@@ -1,13 +1,12 @@
-using System;
+namespace UglyToad.Pdf.Cos
-using System.Collections.Generic;
-using System.Text;
-
-namespace UglyToad.Pdf.Cos
 {
+    using System;
+    using System.Collections.Generic;
+    using System.Text;
     using System.Linq;
     using Util;
 
-    public class CosDictionary : CosBase, ICosUpdateInfo
+    internal class CosDictionary : CosBase, ICosUpdateInfo
     {
         private static readonly string PATH_SEPARATOR = "/";
         private bool needToBeUpdated;
@@ -63,7 +62,7 @@ namespace UglyToad.Pdf.Cos
             var contains = items.Values.Any(x => ReferenceEquals(x, value));
             if (!contains && value is CosObject)
             {
-                contains = items.ContainsValue(((CosObject) value).GetObject());
+                contains = items.ContainsValue(((CosObject)value).GetObject());
             }
             return contains;
         }
@@ -80,7 +79,7 @@ namespace UglyToad.Pdf.Cos
             {
                 Object nextValue = item.Value;
                 if (nextValue.Equals(value)
-                    || nextValue is CosObject && ((CosObject) nextValue).GetObject()
+                    || nextValue is CosObject && ((CosObject)nextValue).GetObject()
                     .Equals(value))
                 {
                     return item.Key;
@@ -176,7 +175,7 @@ namespace UglyToad.Pdf.Cos
 
             if (result is CosObject)
             {
-                result = ((CosObject) result).GetObject();
+                result = ((CosObject)result).GetObject();
             }
             if (result is CosNull)
             {
@@ -239,7 +238,7 @@ namespace UglyToad.Pdf.Cos
          */
         public void setbool(String key, bool value)
         {
-            setItem(CosName.Create(key), (CosBoolean) value);
+            setItem(CosName.Create(key), (CosBoolean)value);
         }
 
         /**
@@ -250,7 +249,7 @@ namespace UglyToad.Pdf.Cos
          */
         public void setbool(CosName key, bool value)
         {
-            setItem(key, (CosBoolean) value);
+            setItem(key, (CosBoolean)value);
         }
 
         /**
@@ -336,7 +335,7 @@ namespace UglyToad.Pdf.Cos
          */
         public void setEmbeddedDate(String embedded, CosName key, DateTime date)
         {
-            CosDictionary dic = (CosDictionary) getDictionaryObject(embedded);
+            CosDictionary dic = (CosDictionary)getDictionaryObject(embedded);
             if (dic == null)
             {
                 dic = new CosDictionary();
@@ -397,7 +396,7 @@ namespace UglyToad.Pdf.Cos
          */
         public void setEmbeddedString(String embedded, CosName key, String value)
         {
-            CosDictionary dic = (CosDictionary) getDictionaryObject(embedded);
+            CosDictionary dic = (CosDictionary)getDictionaryObject(embedded);
             if (dic == null && value != null)
             {
                 dic = new CosDictionary();
@@ -475,7 +474,7 @@ namespace UglyToad.Pdf.Cos
          */
         public void setEmbeddedInt(String embeddedDictionary, CosName key, int value)
         {
-            CosDictionary embedded = (CosDictionary) getDictionaryObject(embeddedDictionary);
+            CosDictionary embedded = (CosDictionary)getDictionaryObject(embeddedDictionary);
             if (embedded == null)
             {
                 embedded = new CosDictionary();
@@ -540,7 +539,7 @@ namespace UglyToad.Pdf.Cos
             CosBase name = getDictionaryObject(key);
             if (name is CosName)
             {
-                return (CosName) name;
+                return (CosName)name;
             }
             return null;
         }
@@ -558,7 +557,7 @@ namespace UglyToad.Pdf.Cos
             CosBase name = getDictionaryObject(key);
             if (name is CosName)
             {
-                return (CosName) name;
+                return (CosName)name;
             }
             return defaultValue;
         }
@@ -588,11 +587,11 @@ namespace UglyToad.Pdf.Cos
             CosBase name = getDictionaryObject(key);
             if (name is CosName)
             {
-                retval = ((CosName) name).Name;
+                retval = ((CosName)name).Name;
             }
             else if (name is CosString)
             {
-                retval = ((CosString) name).GetString();
+                retval = ((CosString)name).GetString();
             }
             return retval;
         }
@@ -653,7 +652,7 @@ namespace UglyToad.Pdf.Cos
             CosBase value = getDictionaryObject(key);
             if (value is CosString)
             {
-                retval = ((CosString) value).GetString();
+                retval = ((CosString)value).GetString();
             }
             return retval;
         }
@@ -741,7 +740,7 @@ namespace UglyToad.Pdf.Cos
         public String getEmbeddedString(String embedded, CosName key, String defaultValue)
         {
             String retval = defaultValue;
-            CosDictionary dic = (CosDictionary) getDictionaryObject(embedded);
+            CosDictionary dic = (CosDictionary)getDictionaryObject(embedded);
             if (dic != null)
             {
                 retval = dic.getString(key, defaultValue);
@@ -773,7 +772,7 @@ namespace UglyToad.Pdf.Cos
             CosBase baseObj = getDictionaryObject(key);
             if (baseObj is CosString)
             {
-                return DateConverter.toCalendar((CosString) baseObj);
+                return DateConverter.toCalendar((CosString)baseObj);
             }
 
             return null;
@@ -870,7 +869,7 @@ namespace UglyToad.Pdf.Cos
 
         {
             var retval = defaultValue;
-            CosDictionary eDic = (CosDictionary) getDictionaryObject(embedded);
+            CosDictionary eDic = (CosDictionary)getDictionaryObject(embedded);
             if (eDic != null)
             {
                 retval = eDic.getDate(key, defaultValue);
@@ -922,7 +921,7 @@ namespace UglyToad.Pdf.Cos
             CosBase boolValue = getDictionaryObject(firstKey, secondKey);
             if (boolValue is CosBoolean)
             {
-                retval = ((CosBoolean) boolValue).Value;
+                retval = ((CosBoolean)boolValue).Value;
             }
 
             return retval;
@@ -980,7 +979,7 @@ namespace UglyToad.Pdf.Cos
         public int getEmbeddedInt(String embeddedDictionary, CosName key, int defaultValue)
         {
             int retval = defaultValue;
-            CosDictionary embedded = (CosDictionary) getDictionaryObject(embeddedDictionary);
+            CosDictionary embedded = (CosDictionary)getDictionaryObject(embeddedDictionary);
             if (embedded != null)
             {
                 retval = embedded.getInt(key, defaultValue);
@@ -1026,7 +1025,7 @@ namespace UglyToad.Pdf.Cos
             CosBase obj = getDictionaryObject(keyList);
             if (obj is ICosNumber)
             {
-                retval = ((ICosNumber) obj).AsInt();
+                retval = ((ICosNumber)obj).AsInt();
             }
             return retval;
         }
@@ -1161,7 +1160,7 @@ namespace UglyToad.Pdf.Cos
             CosBase obj = getDictionaryObject(key);
             if (obj is ICosNumber)
             {
-                retval = ((ICosNumber) obj).AsLong();
+                retval = ((ICosNumber)obj).AsLong();
             }
             return retval;
         }
@@ -1217,7 +1216,7 @@ namespace UglyToad.Pdf.Cos
             CosBase obj = getDictionaryObject(key);
             if (obj is ICosNumber)
             {
-                retval = ((ICosNumber) obj).AsFloat();
+                retval = ((ICosNumber)obj).AsFloat();
             }
             return retval;
         }
@@ -1382,18 +1381,18 @@ namespace UglyToad.Pdf.Cos
          */
         public CosBase getObjectFromPath(String objPath)
         {
-            String[] path = objPath.Split(new string[] {PATH_SEPARATOR}, StringSplitOptions.RemoveEmptyEntries);
+            String[] path = objPath.Split(new string[] { PATH_SEPARATOR }, StringSplitOptions.RemoveEmptyEntries);
             CosBase retval = this;
             foreach (var pathString in path)
             {
                 if (retval is COSArray)
                 {
                     int idx = int.Parse(pathString.Replace("\\[", "").Replace("\\]", ""));
-                  retval = ((COSArray) retval).getObject(idx);
+                    retval = ((COSArray)retval).getObject(idx);
                 }
                 else if (retval is CosDictionary)
                 {
-                    retval = ((CosDictionary) retval).getDictionaryObject(pathString);
+                    retval = ((CosDictionary)retval).getDictionaryObject(pathString);
                 }
             }
 

src/UglyToad.Pdf/Cos/CosFloat.cs

@@ -7,7 +7,7 @@ using UglyToad.Pdf.Core;
 
 namespace UglyToad.Pdf.Cos
 {
-    public class CosFloat : CosBase, ICosNumber, ICosStreamWriter
+    internal class CosFloat : CosBase, ICosNumber, ICosStreamWriter
     {
         private readonly decimal value;
         private readonly string valueAsString;

src/UglyToad.Pdf/Cos/CosInt.cs

@@ -4,7 +4,7 @@ using UglyToad.Pdf.Core;
 
 namespace UglyToad.Pdf.Cos
 {
-    public class CosInt : CosBase, ICosNumber, ICosStreamWriter
+    internal class CosInt : CosBase, ICosNumber, ICosStreamWriter
     {
         /**
          * The lowest integer to be kept in the {@link #STATIC} array.

src/UglyToad.Pdf/Cos/CosName.cs

@@ -16,7 +16,7 @@ namespace UglyToad.Pdf.Cos
      *
      * @author Ben Litchfield
      */
-    public class CosName : CosBase, IComparable<CosName>, ICosStreamWriter
+    internal class CosName : CosBase, IComparable<CosName>, ICosStreamWriter
     {
         // using ConcurrentHashMap because this can be accessed by multiple threads
         private static readonly ConcurrentDictionary<string, CosName> NameMap = new ConcurrentDictionary<string, CosName>();

src/UglyToad.Pdf/Cos/CosNull.cs

@@ -5,7 +5,7 @@ namespace UglyToad.Pdf.Cos
     using System.IO;
     using Core;
 
-    public class CosNull : CosBase, ICosStreamWriter
+    internal class CosNull : CosBase, ICosStreamWriter
     {
         /// <summary>
         /// The Null Token

src/UglyToad.Pdf/Cos/CosObject.cs

@@ -2,7 +2,7 @@
 {
     using ContentStream;
 
-    public class CosObject : CosBase, ICosUpdateInfo
+    internal class CosObject : CosBase, ICosUpdateInfo
     {
         private CosBase baseObject;
         private long objectNumber;

src/UglyToad.Pdf/Cos/CosObjectKey.cs

@@ -2,7 +2,7 @@
 
 namespace UglyToad.Pdf.Cos
 {
-    public class CosObjectKey : IComparable<CosObjectKey>
+    internal class CosObjectKey : IComparable<CosObjectKey>
     {
         public long Number { get; }
         public long Generation { get; }

src/UglyToad.Pdf/Cos/CosString.cs

@@ -1,13 +1,12 @@
-using System;
+namespace UglyToad.Pdf.Cos
-using System.Text;
-using System.IO;
-
-namespace UglyToad.Pdf.Cos
 {
+    using System;
+    using System.Text;
+    using System.IO;
     using System.Collections.Generic;
     using Util;
 
-    public class CosString : CosBase
+    internal class CosString : CosBase
     {
         public byte[] Bytes { get; }
 

src/UglyToad.Pdf/Cos/CrossReferenceTable.cs

@@ -5,7 +5,7 @@
     using ContentStream;
     using Util.JetBrains.Annotations;
 
-    public class CrossReferenceTable
+    internal class CrossReferenceTable
     {
         public CrossReferenceType Type { get; }
 

src/UglyToad.Pdf/Cos/CrossReferenceTablePart.cs

@@ -21,7 +21,7 @@
     /// giving the number of bytes from the beginning of the file to the beginning of the
     /// object. 
     /// </remarks>
-    public class CrossReferenceTablePart
+    internal class CrossReferenceTablePart
     {
         public IReadOnlyDictionary<CosObjectKey, long> ObjectOffsets { get; }
 

src/UglyToad.Pdf/Cos/ICosVisitor.cs

@@ -5,7 +5,7 @@
      *
      * @author Michael Traut
      */
-    public interface ICosVisitor
+    internal interface ICosVisitor
     {
         /**
          * Notification of visit to Array object.
@@ -34,15 +34,6 @@
          */
         object VisitFromDictionary(CosDictionary obj);
         
-        /**
-         * Notification of visit to document object.
-         *
-         * @param obj The Object that is being visited.
-         * @return any Object depending on the visitor implementation, or null
-         * @throws IOException If there is an error while visiting this object.
-         */
-         object VisitFromDocument(COSDocument obj);
-
         /**
          * Notification of visit to float object.
          *

src/UglyToad.Pdf/Filters/Ascii85Filter.cs

@@ -7,7 +7,7 @@
     /// <summary>
     /// ASCII 85 (Base85) is a binary to text encoding using 5 ASCII characters per 4 bytes of data.
     /// </summary>
-    public class Ascii85Filter : IFilter
+    internal class Ascii85Filter : IFilter
     {
         private const byte EmptyBlock = (byte)'z';
         private const byte Offset = (byte)'!';

src/UglyToad.Pdf/Filters/FlateFilter.cs

@@ -16,7 +16,7 @@
     /// See section 3.3.3 of the spec (version 1.7) for details on the FlateDecode filter.
     /// The flate decode filter may have a predictor function to further compress the stream.
     /// </remarks>
-    public class FlateFilter : IFilter
+    internal class FlateFilter : IFilter
     {
         // Defaults are from table 3.7 in the spec (version 1.7)
         private const int DefaultColors = 1;

src/UglyToad.Pdf/Filters/IDecodeParameterResolver.cs

@@ -2,7 +2,7 @@
 {
     using ContentStream;
 
-    public interface IDecodeParameterResolver
+    internal interface IDecodeParameterResolver
     {
         PdfDictionary GetFilterParameters(PdfDictionary streamDictionary, int index);
     }

src/UglyToad.Pdf/Filters/IFilter.cs

@@ -2,7 +2,7 @@
 {
     using ContentStream;
 
-    public interface IFilter
+    internal interface IFilter
     {
         byte[] Decode(byte[] input, PdfDictionary streamDictionary, int filterIndex);
     }

src/UglyToad.Pdf/Fonts/Parser/Handlers/TrueTypeFontHandler.cs

@@ -0,0 +1,6 @@
+namespace UglyToad.Pdf.Fonts.Parser.Handlers
+{
+    internal class TrueTypeFontHandler
+    {
+    }
+}

src/UglyToad.Pdf/Parser/Parts/BruteForceSearcher.cs

@@ -10,7 +10,7 @@
     /// <summary>
     /// Store the results of a brute force search for all Cos Objects in the document so we only do it once.
     /// </summary>
-    public class BruteForceSearcher
+    internal class BruteForceSearcher
     {
         private const int MinimumSearchOffset = 6;
 

src/UglyToad.Pdf/Parser/XrefTrailerResolver.cs

@@ -1,14 +1,10 @@
-using System;
+namespace UglyToad.Pdf.Parser
-using System.Collections.Generic;
-using System.Text;
-
-namespace UglyToad.Pdf.Parser
 {
-    using System.Collections.ObjectModel;
+    using System.Collections.Generic;
     using System.Linq;
     using Cos;
 
-    public class XrefTrailerResolver
+    internal class XrefTrailerResolver
     {
 
         /**

src/UglyToad.Pdf/Tokenization/Tokens/DictionaryToken.cs

@@ -6,7 +6,7 @@
     using Cos;
     using Util.JetBrains.Annotations;
 
-    public class DictionaryToken : IDataToken<IReadOnlyDictionary<IToken, IToken>>
+    internal class DictionaryToken : IDataToken<IReadOnlyDictionary<IToken, IToken>>
     {
         [NotNull]
         public IReadOnlyDictionary<IToken, IToken> Data { get; }

src/UglyToad.Pdf/Tokenization/Tokens/NameToken.cs

@@ -2,7 +2,7 @@
 {
     using Cos;
 
-    public class NameToken : IDataToken<CosName>
+    internal class NameToken : IDataToken<CosName>
     {
         public CosName Data { get; }
 

src/UglyToad.Pdf/Util/DateConverter.cs

@@ -1,13 +1,10 @@
-using System;
+namespace UglyToad.Pdf.Util
-using System.Collections.Generic;
-using System.Text;
-
-namespace UglyToad.Pdf.Util
 {
+    using System;
     using System.Globalization;
     using Cos;
 
-    public class DateConverter
+    internal class DateConverter
     {
         private DateConverter()
         {