InnoLab/NativeFileDialogPackage
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This commit is contained in:
Alexander Filippov
2024-10-04 17:39:09 +02:00
parent 37292d7746
commit 177261bce2
26 changed files with 675 additions and 0 deletions
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Runtime/NativeWrappers.cs Normal file
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Text;
using NativeFileDialogSharp.Native;
namespace NativeFileDialogSharp
{
public static class Dialog
{
private static readonly Encoder utf8encoder = Encoding.UTF8.GetEncoder();
private static readonly bool need32bit = Is32BitWindowsOnNetFramework();
private static bool Is32BitWindowsOnNetFramework()
{
try
{
// we call a function that does nothing just to test if we can load it properly
NativeFileDialogSharp.Native.NativeFunctions.NFD_Dummy();
return false;
}
catch
{
// a call to a default library failed, let's attempt the other one
try
{
NativeFileDialogSharp.Native.NativeFunctions32.NFD_Dummy();
return true;
}
catch
{
// both of them failed so we may as well default to the default one for predictability
return false;
}
}
}
private static unsafe byte[] ToUtf8(string s)
{
var byteCount = Encoding.UTF8.GetByteCount(s);
var bytes = new byte[byteCount + 1];
fixed (byte* o = bytes)
fixed (char* input = s)
{
utf8encoder.Convert(input, s.Length, o, bytes.Length, true, out _, out var _,
out var completed);
Debug.Assert(completed);
}
return bytes;
}
private static unsafe int GetNullTerminatedStringLength(byte* nullTerminatedString)
{
int count = 0;
var ptr = nullTerminatedString;
while (*ptr != 0)
{
ptr++;
count++;
}
return count;
}
private static unsafe string FromUtf8(byte* nullTerminatedString)
{
return Encoding.UTF8.GetString(nullTerminatedString, GetNullTerminatedStringLength(nullTerminatedString));
}
public static unsafe DialogResult FileOpen(string filterList = null, string defaultPath = null)
{
fixed (byte* filterListNts = filterList != null ? ToUtf8(filterList) : null)
fixed (byte* defaultPathNts = defaultPath != null ? ToUtf8(defaultPath) : null)
{
string path = null;
string errorMessage = null;
IntPtr outPathIntPtr;
var result = need32bit
? NativeFunctions32.NFD_OpenDialog(filterListNts, defaultPathNts, out outPathIntPtr)
: NativeFunctions.NFD_OpenDialog(filterListNts, defaultPathNts, out outPathIntPtr);
if (result == nfdresult_t.NFD_ERROR)
{
errorMessage = FromUtf8(NativeFunctions.NFD_GetError());
}
else if (result == nfdresult_t.NFD_OKAY)
{
var outPathNts = (byte*)outPathIntPtr.ToPointer();
path = FromUtf8(outPathNts);
NativeFunctions.NFD_Free(outPathIntPtr);
}
return new DialogResult(result, path, null, errorMessage);
}
}
public static unsafe DialogResult FileSave(string filterList = null, string defaultPath = null)
{
fixed (byte* filterListNts = filterList != null ? ToUtf8(filterList) : null)
fixed (byte* defaultPathNts = defaultPath != null ? ToUtf8(defaultPath) : null)
{
string path = null;
string errorMessage = null;
IntPtr outPathIntPtr;
var result = need32bit
? NativeFunctions32.NFD_SaveDialog(filterListNts, defaultPathNts, out outPathIntPtr)
: NativeFunctions.NFD_SaveDialog(filterListNts, defaultPathNts, out outPathIntPtr);
if (result == nfdresult_t.NFD_ERROR)
{
errorMessage = FromUtf8(NativeFunctions.NFD_GetError());
}
else if (result == nfdresult_t.NFD_OKAY)
{
var outPathNts = (byte*)outPathIntPtr.ToPointer();
path = FromUtf8(outPathNts);
NativeFunctions.NFD_Free(outPathIntPtr);
}
return new DialogResult(result, path, null, errorMessage);
}
}
public static unsafe DialogResult FolderPicker(string defaultPath = null)
{
fixed (byte* defaultPathNts = defaultPath != null ? ToUtf8(defaultPath) : null)
{
string path = null;
string errorMessage = null;
IntPtr outPathIntPtr;
var result = need32bit
? NativeFunctions32.NFD_PickFolder(defaultPathNts, out outPathIntPtr)
: NativeFunctions.NFD_PickFolder(defaultPathNts, out outPathIntPtr);
if (result == nfdresult_t.NFD_ERROR)
{
errorMessage = FromUtf8(NativeFunctions.NFD_GetError());
}
else if (result == nfdresult_t.NFD_OKAY)
{
var outPathNts = (byte*)outPathIntPtr.ToPointer();
path = FromUtf8(outPathNts);
NativeFunctions.NFD_Free(outPathIntPtr);
}
return new DialogResult(result, path, null, errorMessage);
}
}
public static unsafe DialogResult FileOpenMultiple(string filterList = null, string defaultPath = null)
{
fixed (byte* filterListNts = filterList != null ? ToUtf8(filterList) : null)
fixed (byte* defaultPathNts = defaultPath != null ? ToUtf8(defaultPath) : null)
{
List<string> paths = null;
string errorMessage = null;
nfdpathset_t pathSet;
var result = need32bit
? NativeFunctions32.NFD_OpenDialogMultiple(filterListNts, defaultPathNts, &pathSet)
: NativeFunctions.NFD_OpenDialogMultiple(filterListNts, defaultPathNts, &pathSet);
if (result == nfdresult_t.NFD_ERROR)
{
errorMessage = FromUtf8(NativeFunctions.NFD_GetError());
}
else if (result == nfdresult_t.NFD_OKAY)
{
var pathCount = (int)NativeFunctions.NFD_PathSet_GetCount(&pathSet).ToUInt32();
paths = new List<string>(pathCount);
for (int i = 0; i < pathCount; i++)
{
paths.Add(FromUtf8(NativeFunctions.NFD_PathSet_GetPath(&pathSet, new UIntPtr((uint)i))));
}
NativeFunctions.NFD_PathSet_Free(&pathSet);
}
return new DialogResult(result, null, paths, errorMessage);
}
}
}
public class DialogResult
{
private readonly nfdresult_t result;
public string Path { get; }
public IReadOnlyList<string> Paths { get; }
public bool IsError => result == nfdresult_t.NFD_ERROR;
public string ErrorMessage { get; }
public bool IsCancelled => result == nfdresult_t.NFD_CANCEL;
public bool IsOk => result == nfdresult_t.NFD_OKAY;
internal DialogResult(nfdresult_t result, string path, IReadOnlyList<string> paths, string errorMessage)
{
this.result = result;
Path = path;
Paths = paths;
ErrorMessage = errorMessage;
}
}
}