Goo.Widgets.Markdown 0.2.12

Goo.Widgets.Markdown

An optional MarkdownView for Goo. This package depends on Markdig 1.3.2 and Goo.Widgets; the base Goo.Widgets package has no Markdown parser dependency.

dotnet add YourApp.gsproj package Goo.Widgets.Markdown --version 0.2.12

import Goo
import Goo.Widgets.Markdown

Cell.Mount[MarkdownViewInput, MarkdownView](
    "article",
    MarkdownViewInput{Text: "# Release notes\n\nRead the **changes** and [guide](app:guide).", OnLink: OpenLink,}
)

The parser supports CommonMark blocks plus pipe tables, strikethrough, autolinks, and GFM alerts. Raw HTML is shown as text. No scripts, URLs, images, or files are executed or loaded automatically. OnLink receives the target verbatim; ResolveImage optionally returns host-owned image content. Unresolved images keep their selectable alternative text. Returned image Blobs should specify their size.

Each paragraph, heading, code block, and table cell has an owned read-only editor. Pointer/keyboard selection and copying operate within that editor; selection does not span separate blocks. Copying returns plain text with Markdown syntax removed. Inline code, links, and resolved images are atomic selections. Long atomic content uses the measured leaf width and settles after the geometry notification on resize. Fenced code and tables can scroll horizontally. Put the view in a bounded container with OverflowY: Overflow.Scroll for long articles.

CreateBlock customizes block content. CreateInlineStyle supplies text-only Goo Style fields for every span; CreateInline customizes atomic code/link/image content. CreateEditor receives a prepared editor and must keep its controller. Required read-only state, presentation layers, and accessibility wiring are reapplied. CreateRoot customizes the article container. Font, color, spacing, and minimum table column width are ordinary input values. Changed text remounts its owned editor; unchanged blocks retain selection and controllers. Content updates do not accumulate document undo history.

OnHeadings receives heading IDs, labels, levels, and ElementHandles when content changes. IDs are lower-case slugs with duplicate suffixes. Handles become mounted after reconciliation; call ScrollIntoView() from a table-of-contents action. Headings expose heading semantics, and inline links expose keyboard-focusable link semantics when OnLink is supplied.