Merge pull request #19 from JeremyMeissner/5-timeline-implementation

Timeline implementation

Author: JeremyMeissner

FreeFrame/Components/Importer.cs

@@ -1,70 +1,143 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
+using FreeFrame.Components.Shapes;
+using OpenTK.Mathematics;
 using System.Text;
-using System.Threading.Tasks;
 using System.Xml;
-using FreeFrame.Components.Shapes;
 
 namespace FreeFrame.Components
 {
     public static class Importer
     {
-        static public (List<Shape>, bool) ImportFromStream(Stream pStream)
+        /// <summary>
+        /// Import shapes list and timeline from a stream
+        /// </summary>
+        /// <param name="pStream">Given stream</param>
+        /// <returns>Shape list and timeline</returns>
+        /// <exception cref="Exception">If something went wrong in the importation</exception>
+        static private (List<Shape>, SortedDictionary<int, List<Shape>>, bool) ImportFromStream(Stream pStream)
         {
             List<Shape> shapes = new List<Shape>();
+            SortedDictionary<int, List<Shape>> timeline = new SortedDictionary<int, List<Shape>>();
             bool compatibilityFlag = false;
 
+            Shape? previous = null;
+
             using (XmlReader reader = XmlReader.Create(pStream))
             {
-                while (reader.Read())
+                try
                 {
-                    //if (reader.HasAttributes)
+                    while (reader.Read())
                     {
-                        //Console.WriteLine("Attributes of <" + reader.Name + ">");
-                        switch (reader.Name)
+                        if (reader.HasAttributes)
                         {
-                            case "xml":
-                            case "svg":
-                                break; // Skip knowned elements
-                            case "polygon":
-                                shapes.Add(new SVGPolygon(reader));
-                                break;
-                            case "path":
-                                shapes.Add(new SVGPath(reader));
-                                break;
-                            case "rect":
-                                shapes.Add(new SVGRectangle(reader));
-                                break;
-                            case "circle":
-                                shapes.Add(new SVGCircle(reader));
-                                break;
-                            case "line":
-                                shapes.Add(new SVGLine(reader));
-                                break;
-                            default:
-                                compatibilityFlag = true; // If an element is unknow, the flag is trigger
-                                break;
+                            switch (reader.Name)
+                            {
+                                case "xml":
+                                case "svg":
+                                    break; // Skip knowned elements
+                                case "polygon":
+                                    shapes.Add(new SVGPolygon(reader));
+                                    previous = shapes.Last();
+                                    break;
+                                case "path":
+                                    shapes.Add(new SVGPath(reader));
+                                    previous = shapes.Last();
+                                    break;
+                                case "rect":
+                                    shapes.Add(new SVGRectangle(reader));
+                                    previous = shapes.Last();
+                                    break;
+                                case "circle":
+                                    shapes.Add(new SVGCircle(reader));
+                                    previous = shapes.Last();
+                                    break;
+                                case "line":
+                                    shapes.Add(new SVGLine(reader));
+                                    previous = shapes.Last();
+                                    break;
+                                default:
+                                    compatibilityFlag = true; // If an element is unknow, the flag is trigger
+                                    break;
+                            }
                         }
+
                     }
                 }
+                catch (Exception)
+                {
+                    throw new Exception("Error while importing");
+                }
             }
-            return (shapes, compatibilityFlag);
+            return (shapes, new SortedDictionary<int, List<Shape>>(), compatibilityFlag);
         }
-        static public (List<Shape>, bool) ImportFromFile(string pFilename)
+
+        /// <summary>
+        /// Import shapes list and timeline from a file path
+        /// </summary>
+        /// <param name="pFilename">File path</param>
+        /// <returns>Shape list and timeline</returns>
+        /// <exception cref="ArgumentException">If file cannot be found</exception>
+        static public (List<Shape>, SortedDictionary<int, List<Shape>>, bool) ImportFromFile(string pFilename)
         {
             if (!File.Exists(pFilename))
-                throw new ArgumentException($"'{pFilename}' file cannot be found.", nameof(pFilename)); // TODO: replace by a simple alert window
+                throw new ArgumentException($"'{pFilename}' file cannot be found.", nameof(pFilename));
 
             byte[] byteArray = Encoding.UTF8.GetBytes(File.ReadAllText(pFilename));
 
             return ImportFromStream(new MemoryStream(byteArray));
         }
-        static public (List<Shape>, bool) ImportFromString(string pString)
+
+        /// <summary>
+        /// Import shapes list and timeline from a string
+        /// </summary>
+        /// <param name="pString">Given string</param>
+        /// <returns>Shape list and timeline</returns>
+        static public (List<Shape>, SortedDictionary<int, List<Shape>>, bool) ImportFromString(string pString)
         {
             byte[] byteArray = Encoding.UTF8.GetBytes(pString);
 
             return ImportFromStream(new MemoryStream(byteArray));
         }
+
+        /// <summary>
+        /// Export a given shape list into an svg file
+        /// </summary>
+        /// <param name="shapes">Shape list</param>
+        /// <param name="clientSize">Window size</param>
+        /// <param name="path">File path</param>
+        static public void ExportToFile(List<Shape> shapes, Vector2i clientSize, string path)
+        {
+            using (FileStream fs = new FileStream(path, FileMode.Create))
+            {
+                byte[] bytes = Encoding.ASCII.GetBytes($@"<?xml version=""1.0"" encoding=""utf-8"" ?>
+<svg xmlns=""http://www.w3.org/2000/svg"" version=""1.1"" width=""{clientSize.X}"" height=""{clientSize.Y}"" >" + Environment.NewLine);
+
+                for (int i = 0; i < bytes.Length; i++)
+                    fs.WriteByte(bytes[i]);
+
+                foreach (Shape shape in shapes)
+                {
+                    bytes = Encoding.ASCII.GetBytes(shape.ToString() + Environment.NewLine);
+                    for (int i = 0; i < bytes.Length; i++)
+                        fs.WriteByte(bytes[i]);
+                }
+                bytes = Encoding.ASCII.GetBytes("</svg>");
+                for (int i = 0; i < bytes.Length; i++)
+                    fs.WriteByte(bytes[i]);
+            }
+        }
+
+        /// <summary>
+        /// Convert from a string to an Color4 value
+        /// </summary>
+        /// <param name="hexadecimal">hexadecimal string</param>
+        /// <returns>Color4 value</returns>
+        static public Color4 HexadecimalToRGB(string hexadecimal)
+        {
+            float r = Convert.ToInt32(hexadecimal.Substring(1, 2), 16) / 255f;
+            float g = Convert.ToInt32(hexadecimal.Substring(3, 2), 16) / 255f;
+            float b = Convert.ToInt32(hexadecimal.Substring(5, 2), 16) / 255f;
+            float a = Convert.ToInt32(hexadecimal.Substring(7, 2), 16) / 255f;
+            return new Color4(r, g, b, a);
+        }
     }
 }