[isrcalebe]

Overview

Adds MsdfTextFlowContainer and the supporting text-part abstractions required for flow-based MSDF text layout.

The implementation mirrors the behaviour of osu!framework's TextFlowContainer while using MsdfSpriteText as the underlying text drawable.

Changes

• add MsdfTextFlowContainer

  • word wrapping and line breaking
  • paragraph and line spacing
  • first-line and content indentation
  • text anchoring
  • automatic sizing and constrained flow width
  • baseline-aware vertical alignment
  • manual drawable insertion alongside generated text

• add text part abstractions

  • IMsdfTextPart
  • MsdfTextPart
  • MsdfTextChunk
  • MsdfTextNewLine
  • MsdfTextPartManual

• add text splitting support for:

  • whitespace and control characters
  • punctuation and hyphenated text
  • URLs and filesystem paths
  • CJK characters

• support localised text through LocalisableString and LocalisationManager

Testing

Adds a visual comparison scene between TextFlowContainer and MsdfTextFlowContainer, covering:

• multi-line and multi-paragraph text
• explicit line and paragraph breaks
• text anchoring
• first-line/content indentation
• line and paragraph spacing
• CJK text
• URLs and paths
• mixed manual and generated text
• baseline alignment with different font sizes
• interactive zoom and pan comparison