Fix cursor visibility issue in code blocks on iOS/iPadOS

[jparkerweb]

• Added z-index rules for CodeMirror cursor elements
• Removed isolation:isolate on iOS devices to prevent rendering issues
• Added hardware acceleration for better performance
• Fixes 🐛 Cursor is invisible on iPadOS 26 DB3 with only this plugin and dataview #285: cursor disappearing in code blocks when banner is present

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a critical rendering issue on iOS/iPadOS where the CodeMirror cursor would become invisible within code blocks, particularly when a banner element was active. The changes involve strategic adjustments to CSS properties, including z-index for proper layering, removal of conflicting isolation properties, and the application of hardware acceleration to ensure the cursor renders correctly and performs smoothly across Apple mobile devices.

Highlights

• Cursor Visibility: Implemented specific z-index rules for CodeMirror cursor elements to ensure visibility within code blocks when a banner is present.
• iOS Rendering Fix: Removed the isolation:isolate property on iOS devices to resolve rendering conflicts that caused the cursor to disappear.
• Performance Improvement: Introduced hardware acceleration techniques for improved rendering performance on iOS/iPadOS, particularly for CodeMirror elements.
• Bug Fix: Resolved issue 🐛 Cursor is invisible on iPadOS 26 DB3 with only this plugin and dataview #285, which reported the cursor disappearing in code blocks when a banner was active on iOS/iPadOS.

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Changelog

• styles.css
  • Added new CSS rules to explicitly set z-index for CodeMirror cursor and line elements within banner-affected views.
  • Established a proper stacking context for HyperMD code blocks by setting position: relative and z-index.
  • Applied transform: translateZ(0) to the CodeMirror editor for hardware acceleration.
  • Introduced an @supports block specifically for iOS Safari to apply device-specific fixes.
  • Within the iOS-specific block, changed isolation to auto for the banner view to prevent rendering issues.
  • Applied transform: translate3d(0, 0, 0) to CodeMirror content for further hardware acceleration on iOS.
  • Increased the z-index and set position: relative for the CodeMirror cursor layer within the iOS-specific context.

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[gemini-code-assist]

Code Review

This pull request aims to fix a cursor visibility issue on iOS/iPadOS within code blocks when a banner is present. The changes involve adding several CSS rules to manage stacking contexts (z-index), force hardware acceleration for better rendering, and override the isolation property specifically for iOS. While the approach is generally sound and targets the right areas, I've found a couple of opportunities for improvement. One of the new rules could lead to performance and positioning issues due to its broad application. Another rule's comment is inconsistent with its placement, potentially causing confusion. My review includes specific suggestions to refine these rules for better correctness, performance, and maintainability.