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feat: #1469 add menu selections for capitalisations (excluding cycle) #1478

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feat: #1469 add menu selections for capitalisations (excluding cycle) #1478

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b68350d
feat-1469: add menu selections for capitalisations (excluding cycle)
jhoffman91 Jan 13, 2026
23ee78c
jhoffman91 Jan 13, 2026
cf1fd44
use discard parameters
jhoffman91 Jan 13, 2026
005a2ae
revert discards - in line with existing code
jhoffman91 Jan 18, 2026
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131 changes: 131 additions & 0 deletions src/Notepads/Controls/TextEditor/TextEditorContextFlyout.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,13 @@ public sealed class TextEditorContextFlyout : MenuFlyout
private MenuFlyoutItem _previewToggle;
private MenuFlyoutItem _share;

private MenuFlyoutSubItem _capitalizations;
private MenuFlyoutItem _uppercase;
private MenuFlyoutItem _lowercase;
private MenuFlyoutItem _sentencecase;
private MenuFlyoutItem _togglecase;
private MenuFlyoutItem _titlecase;

private MenuFlyout _proofingFlyout;
private readonly MenuFlyoutSeparator _proofingSeparator = new MenuFlyoutSeparator();

Expand All @@ -54,6 +61,7 @@ public TextEditorContextFlyout(ITextEditor editor, TextEditorCore editorCore)
Items.Add(WebSearch);
Items.Add(PreviewToggle);
Items.Add(Share);
Items.Add(Capitalizations);

Opening += TextEditorContextFlyout_Opening;
Closed += TextEditorContextFlyout_Closed;
Expand Down Expand Up @@ -99,6 +107,10 @@ _textEditorCore.ProofingMenuFlyout is MenuFlyout proofingFlyout &&
{
Share.Visibility = Visibility.Collapsed;
}

_textEditorCore.GetTextSelectionPosition(out var start, out var end);
SentenceCase.IsEnabled = start == end;
TitleCase.IsEnabled = start == end;
}

private void BuildProofingSubItems(MenuFlyout proofingFlyout)
Expand Down Expand Up @@ -283,6 +295,125 @@ public MenuFlyoutItem RightToLeftReadingOrder
}
}

public MenuFlyoutItem UpperCase
{
get
{
if (_uppercase != null) return _uppercase;

_uppercase = new MenuFlyoutItem
{
Text = _resourceLoader.GetString("TextEditor_ContextFlyout_UpperCaseButtonDisplayText"),
};
_uppercase.Click += (sender, args) =>
{
_textEditorCore.GetTextSelectionPosition(out var startPos, out var endPos);
_textEditorCore.Capitalize();
_textEditorCore.SetTextSelectionPosition(startPos, endPos);
};
return _uppercase;
}
}

public MenuFlyoutItem LowerCase
{
get
{
if (_lowercase != null) return _lowercase;

_lowercase = new MenuFlyoutItem
{
Text = _resourceLoader.GetString("TextEditor_ContextFlyout_LowerCaseButtonDisplayText"),
};
_lowercase.Click += (sender, args) =>
{
_textEditorCore.GetTextSelectionPosition(out var startPos, out var endPos);
_textEditorCore.Decapitalize();
_textEditorCore.SetTextSelectionPosition(startPos, endPos);
};
return _lowercase;
}
}

public MenuFlyoutItem SentenceCase
{
get
{
if (_sentencecase != null) return _sentencecase;
_sentencecase = new MenuFlyoutItem
{
Text = _resourceLoader.GetString("TextEditor_ContextFlyout_SentenceCaseButtonDisplayText"),
};
_sentencecase.Click += (sender, args) =>
{
_textEditorCore.GetTextSelectionPosition(out var startPos, out var endPos);
_textEditorCore.SentenceCase();
_textEditorCore.SetTextSelectionPosition(startPos, endPos);
};
return _sentencecase;
}
}

public MenuFlyoutItem ToggleCase
{
get
{
if (_togglecase != null) return _togglecase;
_togglecase = new MenuFlyoutItem
{
Text = _resourceLoader.GetString("TextEditor_ContextFlyout_ToggleCaseButtonDisplayText"),
};
_togglecase.Click += (sender, args) =>
{
_textEditorCore.GetTextSelectionPosition(out var startPos, out var endPos);
_textEditorCore.ToggleCase();
_textEditorCore.SetTextSelectionPosition(startPos, endPos);
};
return _togglecase;
}
}

public MenuFlyoutItem TitleCase
{
get
{
if (_titlecase != null) return _titlecase;
_titlecase = new MenuFlyoutItem
{
Text = _resourceLoader.GetString("TextEditor_ContextFlyout_TitleCaseButtonDisplayText"),
};
_titlecase.Click += (sender, args) =>
{
_textEditorCore.GetTextSelectionPosition(out var startPos, out var endPos);
_textEditorCore.TitleCase();
_textEditorCore.SetTextSelectionPosition(startPos, endPos);
};
return _titlecase;
}
}

public MenuFlyoutSubItem Capitalizations
{
get
{
if (_capitalizations != null) return _capitalizations;

_capitalizations = new MenuFlyoutSubItem
{
Text = _resourceLoader.GetString("TextEditor_ContextFlyout_CapitalizationsButtonDisplayText"),
};

_capitalizations.Items.Add(UpperCase);
_capitalizations.Items.Add(LowerCase);
_capitalizations.Items.Add(ToggleCase);
_capitalizations.Items.Add(new MenuFlyoutSeparator());
_capitalizations.Items.Add(TitleCase);
_capitalizations.Items.Add(SentenceCase);

return _capitalizations;
}
}

public MenuFlyoutItem WebSearch
{
get
Expand Down
204 changes: 204 additions & 0 deletions src/Notepads/Controls/TextEditor/TextEditorCore.Capitalizations.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,204 @@
// ---------------------------------------------------------------------------------------------
// Copyright (c) 2019-2024, Jiaqi (0x7c13) Liu. All rights reserved.
// See LICENSE file in the project root for license information.
// ---------------------------------------------------------------------------------------------

namespace Notepads.Controls.TextEditor
{
using Windows.UI.Text;
using System.Text;

public partial class TextEditorCore
{
public void Capitalize()
{
if (Document.Selection.Length != 0)
{
Document.Selection.ChangeCase(LetterCase.Upper);
}
else
{
Document.GetText(TextGetOptions.None, out var text);
Document.SetText(TextSetOptions.None, text.TrimEnd().ToUpperInvariant());
}
}

public void Decapitalize()
{
if (Document.Selection.Length != 0)
{
Document.Selection.ChangeCase(LetterCase.Lower);
}
else
{
Document.GetText(TextGetOptions.None, out var text);
Document.SetText(TextSetOptions.None, text.TrimEnd().ToLowerInvariant());
}
}

public void SentenceCase()
{
if (Document.Selection.Length != 0)
{
return;
}

Document.GetText(TextGetOptions.None, out var text);

if (string.IsNullOrEmpty(text))
{
return;
}

var sb = new StringBuilder(text);
bool capitalizeNext = true;

for (int i = 0; i < sb.Length; i++)
{
var ch = sb[i];

if (capitalizeNext)
{
if (char.IsWhiteSpace(ch) || IsOpeningPunctuation(ch))
{
continue;
}

if (char.IsLetter(ch))
{
sb[i] = char.ToUpperInvariant(ch);
}
capitalizeNext = false;
}
else
{
if (IsSentenceEndingPunctuation(ch))
{
capitalizeNext = true;
}
}
}

Document.SetText(TextSetOptions.None, sb.ToString().TrimEnd());
}

private static bool IsSentenceEndingPunctuation(char c)
{
return c == '.' || c == '!' || c == '?';
}

private static bool IsOpeningPunctuation(char c)
{
switch (c)
{
case '"':
case '\'':
case '(':
case '[':
case '<':
case '{':
case '\u2018': // ‘
case '\u2019': // ’
case '\u201C': // “
case '\u201D': // ”
case '\u00AB': // «
case '\u00BB': // »
return true;

default:
return false;
}
}

public void TitleCase()
{
if (Document.Selection.Length != 0)
{
Document.Selection.GetText(TextGetOptions.None, out var selectedText);
var output = ToTitleCase(selectedText);
Document.Selection.SetText(TextSetOptions.None, output);
}
else
{
Document.GetText(TextGetOptions.None, out var text);
var output = ToTitleCase(text);
Document.SetText(TextSetOptions.None, output.TrimEnd());
}
}

private string ToTitleCase(string input)
{
if (string.IsNullOrEmpty(input))
{
return string.Empty;
}

var sb = new StringBuilder(input.Length);
bool newWord = true;

foreach (var ch in input)
{
if (char.IsLetter(ch))
{
if (newWord)
{
sb.Append(char.ToUpperInvariant(ch));
}
else
{
sb.Append(char.ToLowerInvariant(ch));
}
newWord = false;
}
else
{
sb.Append(ch);
newWord = true;
}
}

return sb.ToString();
}

public void ToggleCase()
{
if (Document.Selection.Length != 0)
{
Document.Selection.GetText(TextGetOptions.None, out var selectedText);
var output = ToggleCase(selectedText);
Document.Selection.SetText(TextSetOptions.None, output);
}
else
{
Document.GetText(TextGetOptions.None, out var text);
var output = ToggleCase(text);
Document.SetText(TextSetOptions.None, output.TrimEnd());
}
}

private string ToggleCase(string text)
{
if (string.IsNullOrEmpty(text))
{
return string.Empty;
}
var sb = new StringBuilder(text?.Length ?? 0);
foreach (var ch in text)
{
if (char.IsUpper(ch))
{
sb.Append(char.ToLowerInvariant(ch));
}
else if (char.IsLower(ch))
{
sb.Append(char.ToUpperInvariant(ch));
}
else
{
sb.Append(ch);
}
}
return sb.ToString();
}
}
}
1 change: 1 addition & 0 deletions src/Notepads/Notepads.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -170,6 +170,7 @@
<Compile Include="Controls\Print\PrintPageFormat.xaml.cs">
<DependentUpon>PrintPageFormat.xaml</DependentUpon>
</Compile>
<Compile Include="Controls\TextEditor\TextEditorCore.Capitalizations.cs" />
<Compile Include="Controls\TextEditor\TextEditorCore.JoinText.cs" />
<Compile Include="Controls\TextEditor\TextEditorCore.ExternalEventListener.cs" />
<Compile Include="Controls\TextEditor\TextEditorCore.LineHighlighter.cs" />
Expand Down
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