React Native: optional hierarchical ordered-list numbering #1051

Problem

Nested ordered lists display local counters (1., 2.) at each level. Applications displaying outlines need optional ancestor-qualified markers (1.1., 1.2., 2.1.), with wrapped text aligned after the full marker.

Proposed API

<EnrichedMarkdownText
  markdown={'1. Parent\n   1. Child\n   2. Another child\n2. Next parent\n   1. Child'}
  markdownStyle={{ list: { numbering: 'hierarchical' } }}
/>

• list.numbering: 'flat' | 'hierarchical', default 'flat'.
• React Native iOS and Android implementations together.
• Derive ancestor counters from parsed list structure, reserve marker width, and restore the parent context after nested lists.
• Keep Markdown parsing and existing default markers unchanged.

Alternatives

Prepending numbers to Markdown text changes the document, complicates streaming/selection, and risks double numbering. A renderer option can keep the source intact.

Validation and open questions

The local 1.1.1 consumer patch was rebuilt and captured on iOS and Android for two-level lists, parent advancement and long wrapped items. Current upstream has newer marker-width/mixed-list fixes; the source-only draft #1053 preserves those, but that port has not yet been built in the upstream example app.

Deeper nesting, mixed ordered/unordered/task lists, non-default starts, RTL, font scaling, live streaming and the upstream default-mode regression matrix still need coverage. The API should be reviewed before marking the draft ready. Web/macOS behavior is outside this initial proposal.

Draft implementation: #1053.