Merge pull request #274 from ddobrev/master

Added an option to generate a single source file per extension

src/Generator/Generator.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using CppSharp.AST;
 
 namespace CppSharp.Generators
@@ -78,8 +79,19 @@ namespace CppSharp.Generators
                 if (templates.Count == 0)
                     continue;
 
-                foreach (var template in templates)
-                    template.Process();
+                if (templates.Count == 1)
+                {
+                    templates[0].Process(Template.Order.First | Template.Order.Last);
+                }
+                else
+                {
+                    templates.First().Process(Template.Order.First);
+                    for (var i = 1; i < templates.Count - 1; i++)
+                    {
+                        templates[i].Process(Template.Order.InBetween);
+                    }
+                    templates.Last().Process(Template.Order.Last);
+                }
 
                 var output = new GeneratorOutput
                     {

src/Generator/Generators/CLI/CLIHeadersTemplate.cs

@@ -20,7 +20,7 @@ namespace CppSharp.Generators.CLI
         {
         }
 
-        public override void Process()
+        public override void Process(Order order)
         {
             PushBlock(BlockKind.Header);
             PopBlock();

src/Generator/Generators/CLI/CLISourcesTemplate.cs

@@ -22,7 +22,7 @@ namespace CppSharp.Generators.CLI
             
         }
 
-        public override void Process()
+        public override void Process(Order order)
         {
             PushBlock(BlockKind.Header);
             PopBlock();

src/Generator/Generators/CLI/CLITextTemplate.cs

@@ -70,7 +70,7 @@ namespace CppSharp.Generators.CLI
 
         public abstract override string FileExtension { get; }
 
-        public abstract override void Process();
+        public abstract override void Process(Order order);
 
         #region Helpers
 

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -128,17 +128,19 @@ namespace CppSharp.Generators.CSharp
 
         #endregion
 
-        public override void Process()
+        public override void Process(Order order)
         {
             GenerateHeader();
 
+            if (!Options.GenerateSingleCSharpFile || order.HasFlag(Order.First))
+            {
                 PushBlock(CSharpBlockKind.Usings);
                 WriteLine("using System;");
                 WriteLine("using System.Runtime.InteropServices;");
                 WriteLine("using System.Security;");
                 foreach (var customUsingStatement in Options.DependentNameSpaces)
                 {
-                WriteLine(string.Format("using {0};", customUsingStatement));;
+                    WriteLine(string.Format("using {0};", customUsingStatement));
                 }
                 PopBlock(NewLineKind.BeforeNextBlock);
 
@@ -148,15 +150,19 @@ namespace CppSharp.Generators.CSharp
                     WriteLine("namespace {0}", Driver.Options.OutputNamespace);
                     WriteStartBraceIndent();
                 }
+            }
 
             GenerateDeclContext(TranslationUnit);
 
+            if (!Options.GenerateSingleCSharpFile || order.HasFlag(Order.Last))
+            {
                 if (Options.GenerateLibraryNamespace)
                 {
                     WriteCloseBraceIndent();
                     PopBlock(NewLineKind.BeforeNextBlock);
                 }
             }
+        }
 
         public void GenerateHeader()
         {

src/Generator/Generators/Template.cs

@@ -31,7 +31,7 @@ namespace CppSharp.Generators
         public NewLineKind NewLineKind { get; set; }
 
         public Block Parent { get; set; }
-        private List<Block> Blocks { get; set; }
+        public List<Block> Blocks { get; set; }
 
         public Declaration Declaration { get; set; }
 
@@ -247,6 +247,14 @@ namespace CppSharp.Generators
 
     public abstract class Template : ITextGenerator
     {
+        [Flags]
+        public enum Order
+        {
+            First = 1,
+            InBetween = 2,
+            Last = 4
+        }
+
         public Driver Driver { get; private set; }
         public DriverOptions Options { get; private set; }
         public TranslationUnit TranslationUnit { get; private set; }
@@ -269,7 +277,7 @@ namespace CppSharp.Generators
             ActiveBlock = RootBlock;
         }
 
-        public abstract void Process();
+        public abstract void Process(Order order);
 
         public string Generate()
         {
@@ -313,7 +321,7 @@ namespace CppSharp.Generators
 
         public Block FindBlock(int kind)
         {
-            return FindBlocks(kind).Single();
+            return FindBlocks(kind).SingleOrDefault();
         }
 
         #endregion

src/Generator/Options.cs

@@ -178,6 +178,10 @@ namespace CppSharp
         public List<string> CodeFiles { get; private set; }
         public readonly List<string> DependentNameSpaces = new List<string>();
         public bool MarshalCharAsManagedChar { get; set; }
+        /// <summary>
+        /// Generates a single C# file.
+        /// </summary>
+        public bool GenerateSingleCSharpFile { get; set; }
     }
 
     public class InvalidOptionException : Exception