Initial support for drag from Chrome

MatterControlLib/Library/RemoteLibraryItem.cs

@@ -0,0 +1,107 @@
+/*
+Copyright (c) 2018, John Lewin
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+The views and conclusions contained in the software and documentation are those
+of the authors and should not be interpreted as representing official policies,
+either expressed or implied, of the FreeBSD Project.
+*/
+
+using System;
+using System.Net.Http;
+using System.Threading.Tasks;
+using MatterHackers.Agg;
+using MatterHackers.Localizations;
+
+namespace MatterHackers.MatterControl.Library
+{
+	public class RemoteLibraryItem : ILibraryAssetStream
+	{
+		private string url;
+		private HttpClient httpClient;
+
+		public RemoteLibraryItem(string url, string name)
+		{
+			httpClient = new HttpClient();
+
+			// TODO: We need a way to ask library items to initialize before use, so that content type could be requested from the remote source before the stream is acquired. Currently properties are 
+			// tested before GetStream is invoked that determine which provider should be used, which is impossible to know before we have the actual content type
+
+			//// Send HEAD request to help bypass the 401 auth challenge for the latter POST assuming
+			//// that the authentication will be cached and re-used later when PreAuthenticate is true.
+			//var request = new HttpRequestMessage(HttpMethod.Head, url);
+
+			//httpClient.SendAsync(request).ContinueWith(t =>
+			//{
+			//	var headers = t.Result.Content.Headers;
+
+			//	this.ContentType = headers.ContentType.MediaType.Replace("image/", "");
+			//	this.FileSize = headers.ContentLength ?? 0;
+			//});
+
+			this.url = url;
+			this.Name = name ?? "Unknown".Localize();
+			this.ID = agg_basics.GetLongHashCode(url).ToString();
+		}
+
+		public string ID { get; set; }
+
+		public string Name { get; set; }
+
+		public string FileName => $"{this.Name}.{this.ContentType}";
+
+		public bool IsProtected => false;
+
+		public bool IsVisible => true;
+
+		public DateTime DateCreated { get; } = DateTime.Now;
+
+		public DateTime DateModified { get; } = DateTime.Now;
+
+		public string ContentType { get; private set; } = "jpg"; // TODO: Remove invalid static assignment used to depict what would be possible with more effort
+
+		public string Category => "General";
+
+		public string AssetPath { get; set; }
+
+		public long FileSize { get; private set; } = 0;
+
+		public bool LocalContentExists => false;
+
+		public async Task<StreamAndLength> GetStream(Action<double, string> progress)
+		{
+
+			var response = await httpClient.GetAsync(this.url);
+
+			var headers = response.Content.Headers;
+
+			//this.ContentType = headers.ContentType.MediaType;
+
+			return new StreamAndLength()
+			{
+				Stream = await response.Content.ReadAsStreamAsync(),
+				Length = headers.ContentLength ?? 0
+			};
+		}
+	}
+}

MatterControlLib/Library/Widgets/LibraryWidget.cs

@@ -1056,7 +1056,8 @@ namespace MatterHackers.MatterControl.PrintLibrary
 					mouseEvent.AcceptDrop = mouseEvent.DragFiles?.Count > 0
 						&& mouseEvent.DragFiles.TrueForAll(filePath => ApplicationController.Instance.IsLoadableFile(filePath)
 							|| (Path.GetExtension(filePath) is string extension
-							&& string.Equals(extension, ".zip", StringComparison.OrdinalIgnoreCase)));
+								&& string.Equals(extension, ".zip", StringComparison.OrdinalIgnoreCase))
+							|| filePath.StartsWith("http", StringComparison.OrdinalIgnoreCase));
 				}
 			}
 

MatterControlLib/Library/Widgets/PrintLibraryWidget.cs

@@ -457,7 +457,8 @@ namespace MatterHackers.MatterControl.PrintLibrary
 					mouseEvent.AcceptDrop = mouseEvent.DragFiles?.Count > 0
 						&& mouseEvent.DragFiles.TrueForAll(filePath => ApplicationController.Instance.IsLoadableFile(filePath)
 							|| (Path.GetExtension(filePath) is string extension
-							&& string.Equals(extension, ".zip", StringComparison.OrdinalIgnoreCase)));
+								&& string.Equals(extension, ".zip", StringComparison.OrdinalIgnoreCase))
+							|| filePath.StartsWith("http", StringComparison.OrdinalIgnoreCase));
 				}
 			}
 

MatterControlLib/PartPreviewWindow/View3D/View3DWidget.cs

@@ -1387,7 +1387,8 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 					{
 						return ApplicationController.Instance.IsLoadableFile(filePath)
 							// Disallow GCode drop in part view
-							&& (this.Printer != null || !string.Equals(System.IO.Path.GetExtension(filePath), ".gcode", StringComparison.OrdinalIgnoreCase));
+							&& (this.Printer != null || !string.Equals(System.IO.Path.GetExtension(filePath), ".gcode", StringComparison.OrdinalIgnoreCase))
+							|| filePath.StartsWith("http", StringComparison.OrdinalIgnoreCase);
 					});
 
 			// View3DWidgets Filesystem DropDrop handler
@@ -1402,7 +1403,15 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 				{
 					// Project DragFiles to IEnumerable<FileSystemFileItem>
 					this.StartDragDrop(
-						mouseEvent.DragFiles.Select(path => new FileSystemFileItem(path)),
+						mouseEvent.DragFiles.Select<string, ILibraryItem>(path =>
+						{
+							if (path.StartsWith("http", StringComparison.OrdinalIgnoreCase))
+							{
+								return new RemoteLibraryItem(path, null);
+							}
+
+							return new FileSystemFileItem(path);
+						}),
 						screenSpaceMousePosition: this.TransformToScreenSpace(mouseEvent.Position),
 						trackSourceFiles: true);
 				}