OniSplit/Xml/GenericXmlWriter.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Xml;
using Oni.Imaging;
using Oni.Metadata;

namespace Oni.Xml
{
    internal class GenericXmlWriter : IMetaTypeVisitor
    {
        private readonly Action<InstanceDescriptor> exportChild;
        private readonly XmlWriter xml;
        private readonly Stack<int> startOffsetStack;
        private InstanceFile instanceFile;
        private BinaryReader reader;

        public static void Write(XmlWriter xml, Action<InstanceDescriptor> exportChild, InstanceDescriptor descriptor)
        {
            var writer = new GenericXmlWriter(xml, exportChild);
            writer.WriteInstance(descriptor);
        }

        private GenericXmlWriter(XmlWriter xml, Action<InstanceDescriptor> exportChild)
        {
            this.exportChild = exportChild;
            this.xml = xml;
            this.startOffsetStack = new Stack<int>();
        }

        private void WriteInstance(InstanceDescriptor descriptor)
        {
            using (reader = descriptor.OpenRead())
            {
                BeginXmlInstance(descriptor);
                descriptor.Template.Type.Accept(this);
                EndXmlInstance();
            }
        }

        private void BeginXmlInstance(InstanceDescriptor descriptor)
        {
            instanceFile = descriptor.File;
            startOffsetStack.Push(reader.Position - 8);

            string tag = descriptor.Template.Tag.ToString();

            xml.WriteStartElement(tag);
            xml.WriteAttributeString("id", XmlConvert.ToString(descriptor.Index));
        }

        private void EndXmlInstance()
        {
            startOffsetStack.Pop();
            xml.WriteEndElement();
        }

        #region IMetaTypeVisitor Members

        void IMetaTypeVisitor.VisitEnum(MetaEnum type)
        {
            type.BinaryToXml(reader, xml);
        }

        void IMetaTypeVisitor.VisitByte(MetaByte type)
        {
            xml.WriteValue(reader.ReadByte());
        }

        void IMetaTypeVisitor.VisitInt16(MetaInt16 type)
        {
            xml.WriteValue(reader.ReadInt16());
        }

        void IMetaTypeVisitor.VisitUInt16(MetaUInt16 type)
        {
            xml.WriteValue(reader.ReadUInt16());
        }

        void IMetaTypeVisitor.VisitInt32(MetaInt32 type)
        {
            xml.WriteValue(reader.ReadInt32());
        }

        void IMetaTypeVisitor.VisitUInt32(MetaUInt32 type)
        {
            xml.WriteValue(reader.ReadUInt32());
        }

        void IMetaTypeVisitor.VisitInt64(MetaInt64 type)
        {
            xml.WriteValue(reader.ReadInt64());
        }

        void IMetaTypeVisitor.VisitUInt64(MetaUInt64 type)
        {
            xml.WriteValue(XmlConvert.ToString(reader.ReadUInt64()));
        }

        void IMetaTypeVisitor.VisitFloat(MetaFloat type)
        {
            xml.WriteValue(reader.ReadSingle());
        }

        void IMetaTypeVisitor.VisitVector2(MetaVector2 type)
        {
            xml.WriteFloatArray(reader.ReadSingleArray(2));
        }

        void IMetaTypeVisitor.VisitVector3(MetaVector3 type)
        {
            xml.WriteFloatArray(reader.ReadSingleArray(3));
        }

        void IMetaTypeVisitor.VisitMatrix4x3(MetaMatrix4x3 type)
        {
            xml.WriteFloatArray(reader.ReadSingleArray(12));
        }

        void IMetaTypeVisitor.VisitPlane(MetaPlane type)
        {
            xml.WriteFloatArray(reader.ReadSingleArray(4));
        }

        void IMetaTypeVisitor.VisitQuaternion(MetaQuaternion type)
        {
            xml.WriteFloatArray(reader.ReadSingleArray(4));
        }

        void IMetaTypeVisitor.VisitBoundingSphere(MetaBoundingSphere type)
        {
            WriteFields(type.Fields);
        }

        void IMetaTypeVisitor.VisitBoundingBox(MetaBoundingBox type)
        {
            WriteFields(type.Fields);
        }

        void IMetaTypeVisitor.VisitColor(MetaColor type)
        {
            Color color = reader.ReadColor();

            if (color.A == 255)
                xml.WriteValue(string.Format(CultureInfo.InvariantCulture, "{0} {1} {2}", color.R, color.G, color.B));
            else
                xml.WriteValue(string.Format(CultureInfo.InvariantCulture, "{0} {1} {2} {3}", color.R, color.G, color.B, color.A));
        }

        void IMetaTypeVisitor.VisitRawOffset(MetaRawOffset type)
        {
            xml.WriteValue(reader.ReadInt32());
        }

        void IMetaTypeVisitor.VisitSepOffset(MetaSepOffset type)
        {
            xml.WriteValue(reader.ReadInt32());
        }

        void IMetaTypeVisitor.VisitPointer(MetaPointer type)
        {
            int id = reader.ReadInt32();

            if (id == 0)
            {
                xml.WriteString(string.Empty);
                return;
            }

            exportChild(instanceFile.GetDescriptor(id));
        }

        void IMetaTypeVisitor.VisitString(MetaString type)
        {
            xml.WriteValue(reader.ReadString(type.Count));
        }

        void IMetaTypeVisitor.VisitPadding(MetaPadding type)
        {
            reader.Skip(type.Count);
        }

        void IMetaTypeVisitor.VisitStruct(MetaStruct type)
        {
            WriteFields(type.Fields);
        }

        void IMetaTypeVisitor.VisitArray(MetaArray type)
        {
            WriteArray(type.ElementType, type.Count);
        }

        void IMetaTypeVisitor.VisitVarArray(MetaVarArray type)
        {
            int count;

            if (type.CountField.Type == MetaType.Int16)
                count = reader.ReadInt16();
            else
                count = reader.ReadInt32();

            WriteArray(type.ElementType, count);
        }

        #endregion

        private void WriteFields(IEnumerable<Field> fields)
        {
            foreach (var field in fields)
            {
                if (field.Type is MetaPadding)
                {
                    field.Type.Accept(this);
                    continue;
                }

                string name = field.Name;

                if (string.IsNullOrEmpty(name))
                {
                    int fieldOffset = reader.Position - startOffsetStack.Peek();
                    name = string.Format(CultureInfo.InvariantCulture, "Offset_{0:X4}", fieldOffset);
                }

                xml.WriteStartElement(name);
                field.Type.Accept(this);
                xml.WriteEndElement();
            }
        }

        private void WriteArray(MetaType elementType, int count)
        {
            bool simpleArray = elementType.IsBlittable;
            simpleArray = false;

            for (int i = 0; i < count; i++)
            {
                startOffsetStack.Push(reader.Position);

                if (!simpleArray)
                    xml.WriteStartElement(elementType.Name);

                elementType.Accept(this);

                if (!simpleArray)
                    xml.WriteEndElement();
                else if (i != count - 1)
                    xml.WriteWhitespace(" \n");

                startOffsetStack.Pop();
            }
        }
    }
}
Revision:	1114
Committed:	Wed Jan 22 14:08:57 2020 UTC (5 years, 9 months ago) by iritscen
File size:	7431 byte(s)
Log Message:	Adding OniSplit source code (v0.9.99.0). Many thanks to Neo for all his work over the years.
#	Content
1	using System;
2	using System.Collections.Generic;
3	using System.Globalization;
4	using System.Xml;
5	using Oni.Imaging;
6	using Oni.Metadata;
7
8	namespace Oni.Xml
9	{
10	internal class GenericXmlWriter : IMetaTypeVisitor
11	{
12	private readonly Action<InstanceDescriptor> exportChild;
13	private readonly XmlWriter xml;
14	private readonly Stack<int> startOffsetStack;
15	private InstanceFile instanceFile;
16	private BinaryReader reader;
17
18	public static void Write(XmlWriter xml, Action<InstanceDescriptor> exportChild, InstanceDescriptor descriptor)
19	{
20	var writer = new GenericXmlWriter(xml, exportChild);
21	writer.WriteInstance(descriptor);
22	}
23
24	private GenericXmlWriter(XmlWriter xml, Action<InstanceDescriptor> exportChild)
25	{
26	this.exportChild = exportChild;
27	this.xml = xml;
28	this.startOffsetStack = new Stack<int>();
29	}
30
31	private void WriteInstance(InstanceDescriptor descriptor)
32	{
33	using (reader = descriptor.OpenRead())
34	{
35	BeginXmlInstance(descriptor);
36	descriptor.Template.Type.Accept(this);
37	EndXmlInstance();
38	}
39	}
40
41	private void BeginXmlInstance(InstanceDescriptor descriptor)
42	{
43	instanceFile = descriptor.File;
44	startOffsetStack.Push(reader.Position - 8);
45
46	string tag = descriptor.Template.Tag.ToString();
47
48	xml.WriteStartElement(tag);
49	xml.WriteAttributeString("id", XmlConvert.ToString(descriptor.Index));
50	}
51
52	private void EndXmlInstance()
53	{
54	startOffsetStack.Pop();
55	xml.WriteEndElement();
56	}
57
58	#region IMetaTypeVisitor Members
59
60	void IMetaTypeVisitor.VisitEnum(MetaEnum type)
61	{
62	type.BinaryToXml(reader, xml);
63	}
64
65	void IMetaTypeVisitor.VisitByte(MetaByte type)
66	{
67	xml.WriteValue(reader.ReadByte());
68	}
69
70	void IMetaTypeVisitor.VisitInt16(MetaInt16 type)
71	{
72	xml.WriteValue(reader.ReadInt16());
73	}
74
75	void IMetaTypeVisitor.VisitUInt16(MetaUInt16 type)
76	{
77	xml.WriteValue(reader.ReadUInt16());
78	}
79
80	void IMetaTypeVisitor.VisitInt32(MetaInt32 type)
81	{
82	xml.WriteValue(reader.ReadInt32());
83	}
84
85	void IMetaTypeVisitor.VisitUInt32(MetaUInt32 type)
86	{
87	xml.WriteValue(reader.ReadUInt32());
88	}
89
90	void IMetaTypeVisitor.VisitInt64(MetaInt64 type)
91	{
92	xml.WriteValue(reader.ReadInt64());
93	}
94
95	void IMetaTypeVisitor.VisitUInt64(MetaUInt64 type)
96	{
97	xml.WriteValue(XmlConvert.ToString(reader.ReadUInt64()));
98	}
99
100	void IMetaTypeVisitor.VisitFloat(MetaFloat type)
101	{
102	xml.WriteValue(reader.ReadSingle());
103	}
104
105	void IMetaTypeVisitor.VisitVector2(MetaVector2 type)
106	{
107	xml.WriteFloatArray(reader.ReadSingleArray(2));
108	}
109
110	void IMetaTypeVisitor.VisitVector3(MetaVector3 type)
111	{
112	xml.WriteFloatArray(reader.ReadSingleArray(3));
113	}
114
115	void IMetaTypeVisitor.VisitMatrix4x3(MetaMatrix4x3 type)
116	{
117	xml.WriteFloatArray(reader.ReadSingleArray(12));
118	}
119
120	void IMetaTypeVisitor.VisitPlane(MetaPlane type)
121	{
122	xml.WriteFloatArray(reader.ReadSingleArray(4));
123	}
124
125	void IMetaTypeVisitor.VisitQuaternion(MetaQuaternion type)
126	{
127	xml.WriteFloatArray(reader.ReadSingleArray(4));
128	}
129
130	void IMetaTypeVisitor.VisitBoundingSphere(MetaBoundingSphere type)
131	{
132	WriteFields(type.Fields);
133	}
134
135	void IMetaTypeVisitor.VisitBoundingBox(MetaBoundingBox type)
136	{
137	WriteFields(type.Fields);
138	}
139
140	void IMetaTypeVisitor.VisitColor(MetaColor type)
141	{
142	Color color = reader.ReadColor();
143
144	if (color.A == 255)
145	xml.WriteValue(string.Format(CultureInfo.InvariantCulture, "{0} {1} {2}", color.R, color.G, color.B));
146	else
147	xml.WriteValue(string.Format(CultureInfo.InvariantCulture, "{0} {1} {2} {3}", color.R, color.G, color.B, color.A));
148	}
149
150	void IMetaTypeVisitor.VisitRawOffset(MetaRawOffset type)
151	{
152	xml.WriteValue(reader.ReadInt32());
153	}
154
155	void IMetaTypeVisitor.VisitSepOffset(MetaSepOffset type)
156	{
157	xml.WriteValue(reader.ReadInt32());
158	}
159
160	void IMetaTypeVisitor.VisitPointer(MetaPointer type)
161	{
162	int id = reader.ReadInt32();
163
164	if (id == 0)
165	{
166	xml.WriteString(string.Empty);
167	return;
168	}
169
170	exportChild(instanceFile.GetDescriptor(id));
171	}
172
173	void IMetaTypeVisitor.VisitString(MetaString type)
174	{
175	xml.WriteValue(reader.ReadString(type.Count));
176	}
177
178	void IMetaTypeVisitor.VisitPadding(MetaPadding type)
179	{
180	reader.Skip(type.Count);
181	}
182
183	void IMetaTypeVisitor.VisitStruct(MetaStruct type)
184	{
185	WriteFields(type.Fields);
186	}
187
188	void IMetaTypeVisitor.VisitArray(MetaArray type)
189	{
190	WriteArray(type.ElementType, type.Count);
191	}
192
193	void IMetaTypeVisitor.VisitVarArray(MetaVarArray type)
194	{
195	int count;
196
197	if (type.CountField.Type == MetaType.Int16)
198	count = reader.ReadInt16();
199	else
200	count = reader.ReadInt32();
201
202	WriteArray(type.ElementType, count);
203	}
204
205	#endregion
206
207	private void WriteFields(IEnumerable<Field> fields)
208	{
209	foreach (var field in fields)
210	{
211	if (field.Type is MetaPadding)
212	{
213	field.Type.Accept(this);
214	continue;
215	}
216
217	string name = field.Name;
218
219	if (string.IsNullOrEmpty(name))
220	{
221	int fieldOffset = reader.Position - startOffsetStack.Peek();
222	name = string.Format(CultureInfo.InvariantCulture, "Offset_{0:X4}", fieldOffset);
223	}
224
225	xml.WriteStartElement(name);
226	field.Type.Accept(this);
227	xml.WriteEndElement();
228	}
229	}
230
231	private void WriteArray(MetaType elementType, int count)
232	{
233	bool simpleArray = elementType.IsBlittable;
234	simpleArray = false;
235
236	for (int i = 0; i < count; i++)
237	{
238	startOffsetStack.Push(reader.Position);
239
240	if (!simpleArray)
241	xml.WriteStartElement(elementType.Name);
242
243	elementType.Accept(this);
244
245	if (!simpleArray)
246	xml.WriteEndElement();
247	else if (i != count - 1)
248	xml.WriteWhitespace(" \n");
249
250	startOffsetStack.Pop();
251	}
252	}
253	}
254	}