[michaelstonis]

Summary

Three related bugs the housekeeping work turned up:

1. Typing ignored the formatting at the caret. With no selection, new text always got the default style, so typing at the end of a bold word wasn't bold. It now takes the style of the character before the caret, or the character after it at the start of a paragraph; images and line breaks are skipped. A pending style (one picked from the toolbar before typing) still takes priority. The new DocumentEditor.GetInsertionStyle and FormattingEngine.GetEffectiveCaretStyle do this, and the toolbar uses the same code.
   • Links: typing at either end of a hyperlink now adds plain text next to it instead of growing the link. Before, typing right after a link extended it. Typing inside a link still edits it.
   • Pending style: it now starts from the caret's style instead of the default. So toggling Italic inside bold text gives bold-italic, and toggling Bold off inside bold text really turns it off.
2. The toolbar showed no active state at a bare caret. With nothing selected, the Bold, Italic, Underline, Strikethrough, Subscript and Superscript buttons now reflect the caret's effective style.
3. Undo, redo and load didn't raise SelectionChanged. Undo and redo now raise it when the caret moves. LoadHtml and LoadMarkdown always raise it, because the document is replaced.

Testing

• 13 new tests in CaretFormattingTests cover:
  • typing after bold text;
  • the start of a paragraph and an empty paragraph;
  • the pending style winning and keeping inherited formatting;
  • typing at either edge of a link, and inside a link;
  • undo after typing next to a link;
  • toolbar state at a caret.
• One existing test that expected the old behaviour was updated and renamed.
• Core.Tests pass (807) and SkiaSharp.Tests pass (29). The SkiaSharp Release build has 0 warnings, and the MAUI shared code compiles cleanly.

Found but not changed here

These are tracked as follow-ups:

• A new paragraph created by pressing Enter after bold text doesn't carry the bold.
• A pending style isn't cleared when the caret moves somewhere else.
• Plain-text paste and find/replace still insert text in the default style.

Checklist

• CHANGELOG Fixed entries under Unreleased
• docs/formatting.md and commands-events.md updated

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Generated by Claude Code

[Copilot]

🟡 Changes recommended

Hyperlink-boundary handling incorrectly moves replacement text outside existing links.

1 open issue

• Preserve hyperlink membership when replacing selected linked text · New

What changed in this PR

Aligns typing and toolbar formatting with the caret’s style and improves selection notifications.

Changes:

• Inherits caret formatting while honoring pending styles.
• Inserts text outside hyperlink boundaries.
• Raises selection-change events after loading and caret-moving undo/redo operations.

File	Description
tests/​MintedTextEditor.Core.Tests/​CharacterFormattingTests.cs	Updates subsequent-typing expectations.
tests/​MintedTextEditor.Core.Tests/​CaretFormattingTests.cs	Adds caret formatting and hyperlink tests.
src/​MintedTextEditor.Maui/​MintedEditorView.cs	Adds selection notifications.
src/​MintedTextEditor.Core/​Toolbar/​ToolbarRenderer.cs	Reflects effective caret formatting.
src/​MintedTextEditor.Core/​Input/​EditorInputController.cs	Applies effective formatting when typing.
src/​MintedTextEditor.Core/​Formatting/​FormattingEngine.cs	Resolves caret and pending styles.
src/​MintedTextEditor.Core/​Formatting/​FontFormattingEngine.cs	Seeds pending formatting from caret style.
src/​MintedTextEditor.Core/​Document/​DocumentEditor.cs	Adds style lookup and hyperlink-boundary handling.
docs/​formatting.md	Documents formatting behavior.
docs/​commands-events.md	Documents selection notifications.
CHANGELOG.md	Records the fixes.

_{Review effort: Balanced}