Steven Kirk
4 years ago
committed by
GitHub
GitHub
31 changed files with 503 additions and 134 deletions
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using System.Collections.Generic; |
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using System.Linq; |
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using Avalonia.Platform.Storage; |
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namespace Avalonia.Input |
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{ |
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public static class DataObjectExtensions |
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{ |
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/// <summary>
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/// Returns a list of files if the DataObject contains files or filenames.
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/// <seealso cref="DataFormats.Files"/>.
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/// </summary>
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/// <returns>
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/// Collection of storage items - files or folders. If format isn't available, returns null.
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/// </returns>
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public static IEnumerable<IStorageItem>? GetFiles(this IDataObject dataObject) |
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{ |
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return dataObject.Get(DataFormats.Files) as IEnumerable<IStorageItem>; |
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} |
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/// <summary>
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/// Returns a list of filenames if the DataObject contains filenames.
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/// <seealso cref="DataFormats.FileNames"/>
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/// </summary>
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/// <returns>
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/// Collection of file names. If format isn't available, returns null.
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/// </returns>
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[System.Obsolete("Use GetFiles, this method is supported only on desktop platforms.")] |
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public static IEnumerable<string>? GetFileNames(this IDataObject dataObject) |
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{ |
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return (dataObject.Get(DataFormats.FileNames) as IEnumerable<string>) |
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?? dataObject.GetFiles()? |
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.Select(f => f.TryGetLocalPath()) |
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.Where(p => !string.IsNullOrEmpty(p)) |
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.OfType<string>(); |
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} |
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/// <summary>
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/// Returns the dragged text if the DataObject contains any text.
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/// <seealso cref="DataFormats.Text"/>
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/// </summary>
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/// <returns>
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/// A text string. If format isn't available, returns null.
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/// </returns>
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public static string? GetText(this IDataObject dataObject) |
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{ |
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return dataObject.Get(DataFormats.Text) as string; |
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} |
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} |
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} |
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@ -0,0 +1,91 @@ |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Runtime.InteropServices.JavaScript; |
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using Avalonia.Browser.Interop; |
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using Avalonia.Browser.Storage; |
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using Avalonia.Input; |
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using Avalonia.Platform.Storage; |
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namespace Avalonia.Browser; |
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internal class BrowserDataObject : IDataObject |
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{ |
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private readonly JSObject _dataObject; |
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public BrowserDataObject(JSObject dataObject) |
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{ |
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_dataObject = dataObject; |
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} |
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public IEnumerable<string> GetDataFormats() |
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{ |
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var types = new HashSet<string>(_dataObject.GetPropertyAsStringArray("types")); |
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var dataFormats = new HashSet<string>(types.Count); |
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foreach (var type in types) |
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{ |
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if (type.StartsWith("text/", StringComparison.Ordinal)) |
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{ |
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dataFormats.Add(DataFormats.Text); |
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} |
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else if (type.Equals("Files", StringComparison.Ordinal)) |
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{ |
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dataFormats.Add(DataFormats.Files); |
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} |
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dataFormats.Add(type); |
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} |
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// If drag'n'drop an image from the another web page, if won't add "Files" to the supported types, but only a "text/uri-list".
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// With "text/uri-list" browser can add actual file as well.
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var filesCount = _dataObject.GetPropertyAsJSObject("files")?.GetPropertyAsInt32("count"); |
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if (filesCount > 0) |
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{ |
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dataFormats.Add(DataFormats.Files); |
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} |
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return dataFormats; |
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} |
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public bool Contains(string dataFormat) |
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{ |
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return GetDataFormats().Contains(dataFormat); |
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} |
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public object? Get(string dataFormat) |
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{ |
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if (dataFormat == DataFormats.Files) |
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{ |
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var files = _dataObject.GetPropertyAsJSObject("files"); |
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if (files is not null) |
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{ |
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return StorageHelper.FilesToItemsArray(files) |
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.Select(reference => reference.GetPropertyAsString("kind") switch |
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{ |
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"directory" => (IStorageItem)new JSStorageFolder(reference), |
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"file" => new JSStorageFile(reference), |
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_ => null |
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}) |
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.Where(i => i is not null) |
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.ToArray()!; |
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} |
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return null; |
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} |
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if (dataFormat == DataFormats.Text) |
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{ |
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if (_dataObject.CallMethodString("getData", "text/plain") is { Length :> 0 } textData) |
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{ |
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return textData; |
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} |
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} |
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if (_dataObject.CallMethodString("getData", dataFormat) is { Length: > 0 } data) |
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{ |
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return data; |
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} |
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return null; |
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} |
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} |
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using System.Runtime.InteropServices.JavaScript; |
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namespace Avalonia.Browser.Interop; |
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internal static partial class GeneralHelpers |
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{ |
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[JSImport("GeneralHelpers.itemsArrayAt", AvaloniaModule.MainModuleName)] |
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public static partial JSObject[] ItemsArrayAt(JSObject jsObject, string key); |
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public static JSObject[] GetPropertyAsJSObjectArray(this JSObject jsObject, string key) => ItemsArrayAt(jsObject, key); |
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[JSImport("GeneralHelpers.itemsArrayAt", AvaloniaModule.MainModuleName)] |
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public static partial string[] ItemsArrayAtAsStrings(JSObject jsObject, string key); |
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public static string[] GetPropertyAsStringArray(this JSObject jsObject, string key) => ItemsArrayAtAsStrings(jsObject, key); |
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[JSImport("GeneralHelpers.callMethod", AvaloniaModule.MainModuleName)] |
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public static partial string IntCallMethodString(JSObject jsObject, string name); |
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[JSImport("GeneralHelpers.callMethod", AvaloniaModule.MainModuleName)] |
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public static partial string IntCallMethodStringString(JSObject jsObject, string name, string arg1); |
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public static string CallMethodString(this JSObject jsObject, string name) => IntCallMethodString(jsObject, name); |
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public static string CallMethodString(this JSObject jsObject, string name, string arg1) => IntCallMethodStringString(jsObject, name, arg1); |
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} |
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export class GeneralHelpers { |
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public static itemsArrayAt(instance: any, key: string): any[] { |
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const items = instance[key]; |
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if (!items) { |
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return []; |
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} |
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const retItems = []; |
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for (let i = 0; i < items.length; i++) { |
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retItems[i] = items[i]; |
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} |
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return retItems; |
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} |
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public static callMethod(instance: any, name: string /*, args */): any { |
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const args = Array.prototype.slice.call(arguments, 2); |
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return instance[name].apply(instance, args); |
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} |
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} |
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