FR: Enhance EmbeddableMarkdownEditor and create MetadataEditor infrastructure

[Copilot]

Overview

This PR addresses the feature request to improve the EmbeddableMarkdownEditor implementation and create a MetadataEditor infrastructure based on patterns from obsidian-better-properties.

Problem Statement

The original issues were:

1. Task 1: Code in MarkdownEditor.ts was not properly implemented even though it was functional
2. Task 2: Unable to access the MetadataEditor within the EmbeddableMarkdownEditor

Changes Made

1. EmbeddableMarkdownEditor Enhancements

The markdown editor has been significantly improved following best practices from obsidian-better-properties:

New Features

• File Path Support: Added filePath parameter to enable proper link rendering ([[wikilinks]])
• Enhanced Callbacks:
  • onFocus - Triggered when editor gains focus
  • onEditorClick - Custom click event handler
  • onEscape - Escape key handler (previously commented out)
• Focus Control: Added focus option to control initial focus state
• Filtered Extensions: Added filteredExtensions array to exclude specific CodeMirror extensions
• Better onChange API: Now passes editor instance as second parameter for easier access

Implementation Improvements

• Uses Constructor<MarkdownScrollableEditView> type from obsidian-typings
• Proper file path handling for link rendering
• Enhanced activeEditor management with MarkdownView containment detection
• Improved method overriding via monkey-patching
• Better code organization and documentation

Usage Example

const editor = createEmbeddableMarkdownEditor(
    plugin.app,
    container,
    {
        value: "Initial content",
        placeholder: "Start typing...",
        focus: true,
        onFocus: (editor) => console.log("Editor focused"),
        onChange: (update, editor) => {
            console.log("Current content:", editor.value);
        },
        onEscape: (editor) => editor.destroy(),
    },
    "path/to/file.md"  // Enables proper link rendering
);

2. MetadataEditor Infrastructure

Created a complete MetadataEditor patching infrastructure that can be optionally integrated:

New Module: src/services/MetadataEditor/

Core Functions:

• resolveMetadataEditorPrototype(plugin) - Extracts MetadataEditor prototype from app
  • Optimized to use existing MarkdownView when available
  • Falls back to temporary view creation only if needed
• patchMetadataEditor(plugin) - Applies patches using monkey-around
  • Patches load() and synchronize() methods
  • Uses unique dedupe keys per method to prevent conflicts
  • Auto-registers cleanup with plugin lifecycle

Design Principles:

• Optional/Modular: Can be enabled when specific use cases require it
• Type-Safe: Uses MetadataEditor types from obsidian-typings package
• Safe Patching: Uses monkey-around with dedupe pattern
• Extensible: Provides foundation for future enhancements

Integration Example

// Basic integration (in main.ts onLayoutReady callback)
try {
    patchMetadataEditor(this);
    console.log("MetadataEditor patch applied");
} catch (error) {
    console.error("Failed to apply patch:", error);
}

See src/services/MetadataEditor/INTEGRATION_EXAMPLE.ts for complete integration patterns including settings toggle.

3. Bug Fixes

Fixed unrelated TypeScript error in MultiSuggest.ts where tag sorting needed proper type handling.

Documentation

Comprehensive documentation has been added:

• 📄 ENHANCEMENT_SUMMARY.md - Complete technical overview and migration guide
• 📄 src/services/MetadataEditor/README.md - MetadataEditor API documentation
• 📄 src/services/MetadataEditor/INTEGRATION_EXAMPLE.ts - Three integration patterns with examples

Testing

• ✅ All TypeScript compilation passes without errors
• ✅ Production build successful (main.js: 866KB)
• ✅ No breaking changes - 100% backward compatible
• ✅ All code review feedback addressed

Backward Compatibility

All changes are fully backward compatible:

• The filePath parameter is optional (defaults to empty string)
• The onChange callback signature is extended (old usage still works)
• All new properties have sensible defaults
• Existing code continues to work without modifications

Files Changed

Modified:

• src/services/MarkdownEditor.ts - Enhanced implementation
• src/components/AddOrEditTaskRC.tsx - Updated to use new API
• src/services/MultiSuggest.ts - Fixed type error

Added:

• src/services/MetadataEditor/ - Complete module with 4 files
• ENHANCEMENT_SUMMARY.md - Comprehensive documentation

References

• obsidian-better-properties EmbeddableMarkdownEditor
• obsidian-better-properties MetadataEditor patch
• obsidian-typings - Type definitions package

Next Steps

The MetadataEditor infrastructure is ready for use when needed. To enable it, follow the integration examples in INTEGRATION_EXAMPLE.ts. The enhanced EmbeddableMarkdownEditor is already active and improves the task editing experience with better link rendering and focus management.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>FR : Enhance the EmbeddableMarkdownEditor and create a MetadataEditor</issue_title>
<issue_description>## Problem Statement

• Task 1 : A lot of code inside the MarkdownEditor.ts has not been implemented properly even though its working without any bug.
• Task 2 : Not able to get the MetadataEditor inside my EmbeddableMarkdownEditor.

Possible Solution

• Go through the properly implemented code for the EmbeddableMarkdownEditor from obsidian-better-properties project using following link : https://github.com/unxok/obsidian-better-properties/blob/main/src/classes/EmbeddableMarkdownEditor/index.ts
• Then after you have improved the code from MarkdownEditor.ts file. Implement the MetadataEditor which can be imported from "obsidian-typings" package. You may create a patch for this. Refer the following code from the obsidian-better-properties project to create such a patch in my project : https://github.com/unxok/obsidian-better-properties/blob/main/src/MetadataEditor/patchMetadataEditor/index.ts</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #432

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