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Inclusion change suggestion via arrows #5

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3 changes: 2 additions & 1 deletion .gitignore
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@@ -1,4 +1,5 @@
project.lock.json/
obj/
bin/
.vscode/
.vscode/
.vs/
210 changes: 158 additions & 52 deletions Hinter.cs
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Expand Up @@ -5,56 +5,162 @@

namespace HinterLib
{
public class Hinter
{
public static string ReadHintedLine<T, TResult>(IEnumerable<T> hintSource, Func<T, TResult> hintField, string inputRegex = ".*", ConsoleColor hintColor = ConsoleColor.DarkGray)
{
ConsoleKeyInfo input;

var suggestion = string.Empty;
var userInput = string.Empty;
var readLine = string.Empty;

while (ConsoleKey.Enter != (input = Console.ReadKey()).Key)
{
if (input.Key == ConsoleKey.Backspace)
userInput = userInput.Any() ? userInput.Remove(userInput.Length - 1, 1) : string.Empty;

else if (input.Key == ConsoleKey.Tab)
userInput = suggestion ?? userInput;

else if (input != null && Regex.IsMatch(input.KeyChar.ToString(), inputRegex))
userInput += input.KeyChar;

suggestion = hintSource.Select(item => hintField(item).ToString())
.FirstOrDefault(item => item.Length > userInput.Length && item.Substring(0, userInput.Length) == userInput);

readLine = suggestion == null ? userInput : suggestion;

ClearCurrentConsoleLine();

Console.Write(userInput);

var originalColor = Console.ForegroundColor;

Console.ForegroundColor = hintColor;

if (userInput.Any()) Console.Write(readLine.Substring(userInput.Length, readLine.Length - userInput.Length));

Console.ForegroundColor = originalColor;
}

Console.WriteLine(readLine);

return userInput.Any() ? readLine : string.Empty;
}

private static void ClearCurrentConsoleLine()
{
int currentLineCursor = Console.CursorTop;
Console.SetCursorPosition(0, Console.CursorTop);
Console.Write(new string(' ', Console.WindowWidth));
Console.SetCursorPosition(0, currentLineCursor);
}
}
public static class Hinter
{
public static string ReadHintedLine<T, TResult>(IEnumerable<T> hintSource, Func<T, TResult> hintField, string inputRegex = ".*", ConsoleColor hintColor = ConsoleColor.DarkGray)
{
ConsoleKeyInfo input;

var hint = new Hint();
var suggestion = string.Empty;
var userInput = string.Empty;
var readLine = string.Empty;

hint.makeListHints(hintSource, hintField, userInput);

while (ConsoleKey.Enter != (input = Console.ReadKey()).Key)
{
if (input.Key == ConsoleKey.Backspace)
userInput = _removeFinalChar(userInput);

else if (input.Key == ConsoleKey.Tab || input.Key == ConsoleKey.RightArrow)
userInput = suggestion ?? userInput;

else if (input != null && Regex.IsMatch(input.KeyChar.ToString(), inputRegex))
userInput += input.KeyChar;

if (input.Key == ConsoleKey.UpArrow)
{
userInput = _removeFinalChar(userInput);
suggestion = hint.nextHint;
}
else if (input.Key == ConsoleKey.DownArrow)
{
userInput = _removeFinalChar(userInput);
suggestion = hint.previousHint;
}
else if (input.Key == ConsoleKey.LeftArrow || input.Key == ConsoleKey.Escape)
{
userInput = _removeFinalChar(userInput);
suggestion = userInput;
}
else
{
if (userInput != "")
{
hint.makeListHints(hintSource, hintField, userInput);
suggestion = hint.currentHint;
}
else
suggestion = userInput;
}

readLine = suggestion == null ? userInput : suggestion;

ClearCurrentConsoleLine();

Console.Write(userInput);

var originalColor = Console.ForegroundColor;

Console.ForegroundColor = hintColor;

Console.Write(readLine.Substring(userInput.Length, readLine.Length - userInput.Length));

Console.ForegroundColor = originalColor;
}

Console.WriteLine(readLine);

return userInput.Any() ? readLine : string.Empty;

}

private static void ClearCurrentConsoleLine()
{
int cursorTop = Console.CursorTop;
Console.SetCursorPosition(0, Console.CursorTop);
Console.Write(new string(' ', Console.WindowWidth));
Console.SetCursorPosition(0, cursorTop);
}

private static string _removeFinalChar(string userInput)
{
return (userInput.Length > 0) ? userInput.Substring(0, userInput.Length - 1) : userInput;
}
}

public class Hint
{
private List<string> _hintList;
private int _hintIndex;

public Hint()
{
_hintList = new List<string>();
_hintIndex = 0;
}
public bool makeListHints<T, TResult>(IEnumerable<T> hintSource, Func<T, TResult> hintField, string userInput)
{
try
{
_hintIndex = 0;
_hintList = Enumerable.Where(Enumerable.Select(hintSource, (T item) => hintField(item).ToString()), (string item) => item.Length > userInput.Length && item.Substring(0, userInput.Length) == userInput).ToList();
if (_hintList.Count() == 0)
_hintList.Add(null);
return true;
}
catch
{
return false;
}
}

public void resetCurrentHint()
{
_hintIndex = 0;
}

public string nextHint
{
get
{
_hintIndex = _calcNextHintIndex();
return _hintList[_hintIndex];
}
}

public string previousHint
{
get
{
_hintIndex = _calcPreviousHintIndex();
return _hintList[_hintIndex];
}
}

public string currentHint
{
get
{
return _hintList[_hintIndex];
}
}

private int _calcNextHintIndex()
{
if (_hintList.Count() > 1)
return (_hintIndex + 1) % _hintList.Count();
else
return 0;
}

private int _calcPreviousHintIndex()
{
if (_hintList.Count() > 1)
return (_hintIndex - 1) < 0 ? _hintList.Count() - 1 : _hintIndex - 1;
else
return 0;
}
}
}
4 changes: 2 additions & 2 deletions Hinter.csproj
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Expand Up @@ -3,14 +3,14 @@
<PropertyGroup>
<Description>Adds hinting capabilities to console applications</Description>
<AssemblyTitle>hinter</AssemblyTitle>
<VersionPrefix>1.1.0</VersionPrefix>
<VersionPrefix>1.2.0</VersionPrefix>
<Authors>Fabio Junqueira</Authors>
<TargetFrameworks>netstandard2.0</TargetFrameworks>
<AssemblyName>hinter</AssemblyName>
<PackageId>hinter</PackageId>
<PackageTags>console;hinting;hint;autocomplete;completion</PackageTags>
<PackageProjectUrl>http://www.github.com/fjunqueira/hinter</PackageProjectUrl>
<PackageLicenseUrl>https://opensource.org/licenses/MIT</PackageLicenseUrl>
<NetStandardImplicitPackageVersion>1.6.0</NetStandardImplicitPackageVersion>
<NetStandardImplicitPackageVersion>1.7.0</NetStandardImplicitPackageVersion>
</PropertyGroup>
</Project>