New SwiftUI Modifiers Implementation

This document explains the implementation of two new SwiftUI modifiers in TachUI:

1. .resizable() Modifier

Purpose

The .resizable() modifier makes images resizable, allowing them to scale to fit their container. In SwiftUI, this is commonly used with Image views to make them scale appropriately.

Implementation Details

• Class: ResizableModifier in base.ts
• Type: Appearance modifier
• Priority: APPEARANCE (200)
• Functionality: Sets object-fit: fill on image elements

Usage

Image("my-photo.jpg")
  .modifier
  .resizable()
  .frame(200, 150)
  .build()

CSS Equivalent

img {
  object-fit: fill;
}

2. .textCase() Alias

Purpose

.textCase() is an alias for the existing .textTransform() modifier, providing API parity with SwiftUI's .textCase() modifier.

Implementation Details

• Function: textCase() in typography.ts
• Type: Typography modifier
• Functionality: Calls textTransform() with the same parameters

Usage

Text("Hello World")
  .modifier
  .textCase('uppercase')  // Same as .textTransform('uppercase')
  .build()

Supported Values

• 'none' - No transformation
• 'uppercase' - All uppercase
• 'lowercase' - All lowercase
• 'capitalize' - First letter of each word capitalized

CSS Equivalent

.text {
  text-transform: uppercase; /* or lowercase, capitalize, none */
}

Implementation Files

1. base.ts - Added ResizableModifier class
2. builder.ts - Added .resizable() method to ModifierBuilderImpl
3. typography.ts - Added textCase() alias function
4. index.ts - Exported new modifier and alias
5. types.ts - Added method signatures to ModifierBuilder interface
6. __tests__/new-modifiers.test.ts - Test suite for new modifiers
7. apps/examples/new-modifiers-demo.ts - Usage examples

Testing

The new modifiers have been tested with:

• Basic functionality tests
• Integration with existing modifier system
• Edge cases (non-image elements for resizable)

All tests pass, confirming that the new modifiers work correctly with the existing TachUI modifier system.