public static Task<byte[]> readAsBytes(this File f)
{
// X:\jsc.svn\examples\javascript\io\WebApplicationSelectingFile\WebApplicationSelectingFile\Application.cs
// X:\jsc.svn\examples\javascript\io\DropFileForMD5Experiment\DropFileForMD5Experiment\Application.cs
var y = new TaskCompletionSource<byte[]>();
var x = new FileReader();
//Console.WriteLine("readAsText FileReader");
x.onload =
new Action(
delegate
{
var a = (ArrayBuffer)x.result;
var u8c = new Uint8ClampedArray(array: a);
// X:\jsc.svn\core\ScriptCoreLib\JavaScript\BCLImplementation\System\Net\WebClient.cs
y.SetResult((byte[])u8c);
}
);
// partial build?
// move to .Async?
x.readAsArrayBuffer(f);
//Console.WriteLine("readAsText FileReader readAsText");
return y.Task;
}
public static void ReadAllText(this global::System.IO.FileInfo f, Action<string> yield)
{
var ff = (__FileInfo)(object)f;
var r = new FileReader();
r.onload = IFunction.OfDelegate(
new Action(
delegate
{
yield((string)r.result);
}
)
);
r.readAsText(ff.InternalFile, null);
}
/// <summary>
/// This is a javascript application.
/// </summary>
/// <param name="page">HTML document rendered by the web server which can now be enhanced.</param>
public Application(IDefault page)
{
#region AtFile
Action<File> AtFile =
f =>
{
var n = new MyFile();
// databind here?
n.name.innerText = f.name;
n.type.innerText = f.type;
n.lastModifiedDate.innerText = "" + f.lastModifiedDate;
#region hex
new FileReader().With(
reader =>
{
reader.onload = IFunction.Of(
delegate
{
var x = (ArrayBuffer)reader.result;
var u8 = new Uint8Array(x, 0, 8);
var pre = new IHTMLPre().AttachTo(n.Container);
pre.style.border = "1px solid gray";
for (uint i = 0; i < u8.length; i++)
{
pre.innerText += u8[i].ToString("x2") + " ";
}
}
);
// Read in the image file as a data URL.
reader.readAsArrayBuffer(f);
}
);
#endregion
#region AsDataURL
Action<Action<string>> AsDataURL =
h =>
{
var reader = new FileReader();
reader.onload = IFunction.Of(
delegate
{
var base64 = (string)reader.result;
h(base64);
}
);
// Read in the image file as a data URL.
reader.readAsDataURL(f);
};
#endregion
#region image
if (f.type.StartsWith("image/"))
{
AsDataURL(
base64 =>
new IHTMLImage
{
src = base64,
}.AttachTo(n.Container)
);
}
#endregion
#region audio
if (f.type.StartsWith("audio/"))
{
AsDataURL(
base64 =>
new IHTMLAudio
{
src = base64,
controls = true,
}.AttachTo(n.Container)
);
}
#endregion
#region video
//if (f.type.StartsWith("video/"))
//{
// AsDataURL(
// base64 =>
// new IHTMLVideo
// {
// src = base64,
// controls = true,
// }.AttachTo(n.Container)
// );
//}
#endregion
n.Container.AttachTo(page.list);
};
#endregion
#region onchange
page.files.onchange +=
e =>
{
FileList x = page.files.files;
page.list.Clear();
page.list.Add("files: " + x.length);
for (uint i = 0; i < x.length; i++)
{
File f = x[i];
AtFile(f);
}
};
#endregion
page.drop_zone.ondragleave +=
delegate
{
page.drop_zone.style.borderColor = JSColor.Gray;
page.drop_zone.style.backgroundColor = JSColor.None;
};
#region dragover
page.drop_zone.ondragover +=
evt =>
{
page.drop_zone.style.borderColor = JSColor.Red;
page.drop_zone.style.backgroundColor = JSColor.FromRGB(0xff, 0xaf, 0xaf);
evt.StopPropagation();
evt.PreventDefault();
evt.dataTransfer.dropEffect = "copy"; // Explicitly show this is a copy.
};
page.drop_zone.ondrop +=
evt =>
{
page.drop_zone.style.borderColor = JSColor.Green;
page.drop_zone.style.backgroundColor = JSColor.FromRGB(0xaf, 0xff, 0xaf);
evt.StopPropagation();
evt.PreventDefault();
FileList x = evt.dataTransfer.files; // FileList object.
page.list.Clear();
page.list.Add("files: " + x.length);
for (uint i = 0; i < x.length; i++)
{
File f = x[i];
AtFile(f);
}
};
#endregion
}
public static void ToDataURLAsync(this Blob f, Action<string> y)
{
var reader = new FileReader();
reader.onload = IFunction.Of(
delegate
{
var base64 = (string)reader.result;
y(base64);
}
);
// Read in the image file as a data URL.
reader.readAsDataURL(f);
}
public static Task<string> readAsText(this File f)
{
// tested by
// X:\jsc.svn\examples\javascript\chrome\apps\ChromeCSVFileHandler\ChromeCSVFileHandler\Application.cs
var y = new TaskCompletionSource<string>();
var x = new FileReader();
//Console.WriteLine("readAsText FileReader");
x.onload =
new Action(
delegate
{
//Console.WriteLine("readAsText FileReader onload");
y.SetResult((string)x.result);
}
);
x.readAsText(f, "UTF-8");
//Console.WriteLine("readAsText FileReader readAsText");
return y.Task;
}