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Support UTF8 to UTF16 LE.

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Support Unicode helper
Fix ANSFR to show 2 same faces in 1 image
This commit is contained in:
Tuan Nghia Nguyen
2026-03-31 21:52:47 +11:00
parent 70be68d0fc
commit ccfc5964d4
21 changed files with 379 additions and 104 deletions
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125
dotnet/ANSUnicodeHelper/ANSUnicodeHelper.cs Normal file
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using System;
using System.Drawing;
using System.Text;
using System.Text.RegularExpressions;
namespace ANSCENTER
{
/// <summary>
/// Unicode helper for LabVIEW .NET interop.
/// All methods are static — no instance creation needed.
/// In LabVIEW: use Invoke Node with class type ANSCENTER.ANSUnicodeHelper.
/// Thread-safe: no shared mutable state.
/// </summary>
public class ANSUnicodeHelper
{
// Pre-compiled regex — compiled once at class load, zero per-call cost
private static readonly Regex UnicodeEscapeRegex =
new Regex(@"\\u([0-9a-fA-F]{4})", RegexOptions.Compiled);
/// <summary>
/// Constructor for LabVIEW (if needed). Lightweight, no state.
/// </summary>
public ANSUnicodeHelper() { }
/// <summary>
/// Decodes \uXXXX escape sequences to Unicode characters.
/// ASCII strings pass through unchanged (zero allocation).
/// </summary>
public static string Decode(string input)
{
if (string.IsNullOrEmpty(input)) return input ?? string.Empty;
if (input.IndexOf("\\u", StringComparison.Ordinal) < 0) return input;
return UnicodeEscapeRegex.Replace(input, match =>
{
int codepoint = Convert.ToInt32(match.Groups[1].Value, 16);
return ((char)codepoint).ToString();
});
}
/// <summary>
/// Draws Unicode string at position (x, y).
/// </summary>
public static void DrawString(Graphics g, string escapedText, Font font, Brush brush, float x, float y)
{
if (g == null || string.IsNullOrEmpty(escapedText)) return;
g.DrawString(Decode(escapedText), font, brush, x, y);
}
/// <summary>
/// Draws Unicode string at position (x, y) with StringFormat.
/// </summary>
public static void DrawString(Graphics g, string escapedText, Font font, Brush brush, float x, float y, StringFormat format)
{
if (g == null || string.IsNullOrEmpty(escapedText)) return;
g.DrawString(Decode(escapedText), font, brush, x, y, format);
}
/// <summary>
/// Draws Unicode string at PointF with StringFormat.
/// </summary>
public static void DrawString(Graphics g, string escapedText, Font font, Brush brush, PointF point, StringFormat format)
{
if (g == null || string.IsNullOrEmpty(escapedText)) return;
g.DrawString(Decode(escapedText), font, brush, point, format);
}
/// <summary>
/// Draws Unicode string inside a RectangleF with word wrapping.
/// </summary>
public static void DrawString(Graphics g, string escapedText, Font font, Brush brush, RectangleF layoutRect)
{
if (g == null || string.IsNullOrEmpty(escapedText)) return;
g.DrawString(Decode(escapedText), font, brush, layoutRect);
}
/// <summary>
/// Draws Unicode string inside a RectangleF with StringFormat.
/// </summary>
public static void DrawString(Graphics g, string escapedText, Font font, Brush brush, RectangleF layoutRect, StringFormat format)
{
if (g == null || string.IsNullOrEmpty(escapedText)) return;
g.DrawString(Decode(escapedText), font, brush, layoutRect, format);
}
/// <summary>
/// Measures Unicode string size after decoding.
/// </summary>
public static SizeF MeasureString(Graphics g, string escapedText, Font font)
{
if (g == null || string.IsNullOrEmpty(escapedText)) return SizeF.Empty;
return g.MeasureString(Decode(escapedText), font);
}
/// <summary>
/// Measures Unicode string size with layout area and StringFormat.
/// </summary>
public static SizeF MeasureString(Graphics g, string escapedText, Font font, SizeF layoutArea, StringFormat format)
{
if (g == null || string.IsNullOrEmpty(escapedText)) return SizeF.Empty;
return g.MeasureString(Decode(escapedText), font, layoutArea, format);
}
/// <summary>
/// Checks if string contains \uXXXX escapes.
/// </summary>
public static bool HasUnicodeEscapes(string input)
{
if (string.IsNullOrEmpty(input)) return false;
return input.IndexOf("\\u", StringComparison.Ordinal) >= 0;
}
/// <summary>
/// Checks if string is pure ASCII.
/// </summary>
public static bool IsAsciiOnly(string input)
{
if (string.IsNullOrEmpty(input)) return true;
foreach (char c in input)
{
if (c > 127) return false;
}
return true;
}
}
}

21
dotnet/ANSUnicodeHelper/ANSUnicodeHelper.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<ItemGroup>
<Reference Include="System.Drawing" />
</ItemGroup>
<PropertyGroup>
<TargetFramework>net48</TargetFramework>
<AssemblyName>ANSUnicodeHelper</AssemblyName>
<RootNamespace>ANSCENTER</RootNamespace>
<GenerateAssemblyInfo>true</GenerateAssemblyInfo>
<AssemblyVersion>1.0.0.0</AssemblyVersion>
<FileVersion>1.0.0.0</FileVersion>
<Company>ANSCENTER</Company>
<Product>ANSUnicodeHelper</Product>
<Description>Unicode helper for LabVIEW .NET interop - decodes \uXXXX escapes to .NET System.String</Description>
<OutputPath>..\..\cmake-build-release\bin\</OutputPath>
<AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
</PropertyGroup>
</Project>

58
dotnet/ANSUnicodeHelper/obj/ANSUnicodeHelper.csproj.nuget.dgspec.json Normal file
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dotnet/ANSUnicodeHelper/obj/ANSUnicodeHelper.csproj.nuget.g.props Normal file
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dotnet/ANSUnicodeHelper/obj/ANSUnicodeHelper.csproj.nuget.g.targets Normal file
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dotnet/ANSUnicodeHelper/obj/project.assets.json Normal file
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