## Fix rewriteStyleSheets to Ensure Global Constructable Stylesheets Are Processed

[rjlg]

Fix rewriteStyleSheets to Ensure Global Constructable Stylesheets Are Processed

Issue:

• document.adoptedStyleSheets was not being checked when shadowRoot was undefined, leading to missing pseudo-state rewrites for global (non-Shadow DOM) styles.
• This likely caused Constructable Stylesheets in document.adoptedStyleSheets to be ignored, preventing pseudo-state transformations from applying correctly.

Fixes & Enhancements:

• Ensures document.adoptedStyleSheets is always included when processing styles globally.
• Consolidates styles from both shadowRoot and document to guarantee all stylesheets are rewritten.
• Uses a Set to remove duplicates, preventing redundant stylesheet processing.

Key Changes:

• Now explicitly includes document.adoptedStyleSheets when shadowRoot is undefined.
• Constructs a unified set of stylesheets from:
  • shadowRoot.styleSheets (if available)
  • shadowRoot.adoptedStyleSheets (if available)
  • document.styleSheets
  • document.adoptedStyleSheets
• Uses Set([...styles]) to remove duplicates before iterating over stylesheets.

Impact:

• Fixes missing pseudo-state transformations for global Constructable Stylesheets.
• Ensures parity between Shadow DOM and global styles in pseudo-state rewriting.
• Prevents redundant processing of duplicate stylesheets, improving efficiency.