Fix: framework to detect embedded live preview in phoenix code

[abose]

Summary

• Added isPhoenixEmbeddedIframe to __PHOENIX_EMBED_INFO to distinguish embedded live preview iframes from popped-out
  browser windows
• Added __PHOENIX_EMBED_INFO.onPhoenixEmbeddedInfoAvailable(callback) to detect embedded state asynchronously
• Hidden the hot corner button in embedded iframes

API

  // Available on window.__PHOENIX_EMBED_INFO (only in non-external-browser frames)                                         
    window.__PHOENIX_EMBED_INFO && window.__PHOENIX_EMBED_INFO.onPhoenixEmbeddedInfoAvailable(function(isEmbedded) {                                         
      // isEmbedded: true if inside Phoenix, false if popped out .             
      // Guaranteed to fire in embedded iframes, but NOT guaranteed to fire in non-embedded (popped out) frames.                                                                
  });                                                                                                                       

Quirks

• Guaranteed to fire in embedded iframes, but NOT guaranteed to fire in non-embedded (popped out) frames.
• Assume non-embedded by default. Use this callback only to detect and react to the embedded case.
• If isPhoenixEmbeddedIframe is already resolved when you register, the callback fires immediately.

How hot-corners uses it

Creates the hot corner optimistically, then registers onPhoenixEmbeddedInfoAvailable — if it confirms embedded, removes the hot corner. This avoids depending on the callback for the non-embedded case.

[sonarqubecloud]

Quality Gate passed

Issues
7 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud