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* Responsive Layout Utility Functions
*
* Helper functions for responsive layout calculations and touch target validation
*
* @module utils/responsiveLayout
* @category Mobile UI
* @korean 반응형레이아웃유틸
*/
/**
* Minimum touch target size according to iOS Human Interface Guidelines
*/
export const MIN_TOUCH_TARGET_SIZE = 44;
/**
* Validate if an element meets minimum touch target requirements
*
* @param width - Element width in pixels
* @param height - Element height in pixels
* @param minSize - Minimum size (default: 44px iOS guideline)
* @returns True if element meets minimum requirements
*
* @example
* ```typescript
* const isValid = isValidTouchTarget(50, 50); // true
* const isTooSmall = isValidTouchTarget(30, 30); // false
* ```
*/
export function isValidTouchTarget(
width: number,
height: number,
minSize: number = MIN_TOUCH_TARGET_SIZE
): boolean {
return width >= minSize && height >= minSize;
}
/**
* Calculate optimal font size for given viewport width
* Ensures minimum readable font sizes on mobile
*
* @param viewportWidth - Viewport width in pixels
* @param baseSize - Base font size for desktop (default: 16)
* @param minSize - Minimum font size for mobile (default: 14)
* @returns Calculated font size in pixels
*
* @example
* ```typescript
* const fontSize = calculateFontSize(375, 16, 14); // 14px for mobile
* const fontSize = calculateFontSize(1920, 16, 14); // 16px for desktop
* ```
*/
export function calculateFontSize(
viewportWidth: number,
baseSize: number = 16,
minSize: number = 14
): number {
if (viewportWidth < 768) {
// Mobile: use minimum size or scale down slightly
return Math.max(minSize, Math.floor(baseSize * 0.875));
} else if (viewportWidth < 1024) {
// Tablet: scale proportionally
return Math.max(minSize, Math.floor(baseSize * 0.9375));
}
// Desktop: use base size
return baseSize;
}
/**
* Calculate element position within safe area
* Ensures elements don't overlap notch or home indicator
*
* @param value - Position value in pixels
* @param safeAreaInset - Safe area inset for that edge
* @returns Adjusted position value
*
* @example
* ```typescript
* const top = calculateSafePosition(10, 44); // 54px (10 + 44)
* const bottom = calculateSafePosition(20, 34); // 54px (20 + 34)
* ```
*/
export function calculateSafePosition(
value: number,
safeAreaInset: number
): number {
return value + safeAreaInset;
}
/**
* Calculate optimal HUD height for given viewport
* Scales based on device type and orientation
*
* @param viewportWidth - Viewport width in pixels
* @param isLandscape - Whether in landscape orientation
* @returns HUD height in pixels
*
* @example
* ```typescript
* const hudHeight = calculateHUDHeight(375, false); // ~80px for mobile portrait
* const hudHeight = calculateHUDHeight(667, true); // ~60px for mobile landscape
* ```
*/
export function calculateHUDHeight(
viewportWidth: number,
isLandscape: boolean
): number {
const isMobile = viewportWidth < 768;
const isSmallMobile = viewportWidth <= 375; // Changed to <= to match 375px iPhone SE
if (isLandscape && isMobile) {
// Landscape: minimize HUD to maximize gameplay area
return isSmallMobile ? 60 : 70;
}
if (isMobile) {
// Portrait mobile: compact but readable
return isSmallMobile ? 80 : 95;
}
// Desktop/tablet: larger HUD with more information
return 120;
}
/**
* Calculate optimal control bar height for mobile
*
* @param isMobile - Whether on mobile device
* @param isLandscape - Whether in landscape orientation
* @returns Control bar height in pixels
*/
export function calculateControlsHeight(
isMobile: boolean,
isLandscape: boolean
): number {
if (!isMobile) {
return 0; // Desktop uses keyboard
}
if (isLandscape) {
return 100; // Minimal controls in landscape
}
return 130; // Full touch controls in portrait
}
/**
* Calculate spacing between HUD elements
* Ensures proper touch targets and visual hierarchy
*
* @param isMobile - Whether on mobile device
* @param density - Spacing density ('compact' | 'normal' | 'spacious')
* @returns Spacing value in pixels
*/
export function calculateSpacing(
isMobile: boolean,
density: 'compact' | 'normal' | 'spacious' = 'normal'
): number {
const baseSpacing = isMobile ? 8 : 12;
switch (density) {
case 'compact':
return Math.floor(baseSpacing * 0.75);
case 'spacious':
return Math.ceil(baseSpacing * 1.5);
case 'normal':
default:
return baseSpacing;
}
}
/**
* Calculate optimal progress bar dimensions
* Ensures bars are touch-friendly on mobile
*
* @param isMobile - Whether on mobile device
* @param type - Bar type ('health' | 'ki' | 'stamina')
* @returns Bar dimensions { width, height }
*/
export function calculateProgressBarSize(
isMobile: boolean,
type: 'health' | 'ki' | 'stamina'
): { width: number; height: number } {
if (isMobile) {
// Mobile: touch-friendly sizes
const height = type === 'health' ? 48 : 40; // Health bar larger
return {
width: 160,
height,
};
}
// Desktop: more detailed display
const height = type === 'health' ? 55 : 45;
return {
width: 220,
height,
};
}
/**
* Get optimal grid layout for trigram stance selector
*
* @param isMobile - Whether on mobile device
* @param isLandscape - Whether in landscape orientation
* @returns Grid configuration { columns, rows, gap }
*/
export function getStanceSelectorLayout(
isMobile: boolean,
isLandscape: boolean
): { columns: number; rows: number; gap: number } {
if (isMobile) {
if (isLandscape) {
// Landscape: horizontal layout
return { columns: 4, rows: 2, gap: 8 };
}
// Portrait: compact grid
return { columns: 4, rows: 2, gap: 10 };
}
// Desktop: spacious layout
return { columns: 4, rows: 2, gap: 15 };
}
/**
* Resolution breakpoints for responsive design
* @korean 반응형 중단점
*/
export interface ResolutionBreakpoints {
readonly mobile: number; // 768px
readonly tablet: number; // 1280px
readonly desktop: number; // 1920px
readonly ultrawide: number; // 2560px
}
/**
* Standard breakpoints for responsive sizing
*/
export const BREAKPOINTS: ResolutionBreakpoints = Object.freeze({
mobile: 768,
tablet: 1280,
desktop: 1920,
ultrawide: 2560,
});
/**
* Get responsive size based on screen width
* Scales linearly between breakpoints
*
* @param width - Screen width in pixels
* @param sizes - Size values at each breakpoint
* @returns Interpolated size value
*
* @example
* ```typescript
* const fontSize = getResponsiveSize(1024, { mobile: 12, tablet: 14, desktop: 16 });
* // Returns ~13.3 (interpolated between mobile and tablet)
* ```
*/
export function getResponsiveSize(
width: number,
sizes: { mobile: number; tablet: number; desktop: number }
): number {
if (width < BREAKPOINTS.mobile) {
return sizes.mobile;
}
if (width < BREAKPOINTS.tablet) {
const ratio = (width - BREAKPOINTS.mobile) / (BREAKPOINTS.tablet - BREAKPOINTS.mobile);
return sizes.mobile + (sizes.tablet - sizes.mobile) * ratio;
}
if (width < BREAKPOINTS.desktop) {
const ratio = (width - BREAKPOINTS.tablet) / (BREAKPOINTS.desktop - BREAKPOINTS.tablet);
return sizes.tablet + (sizes.desktop - sizes.tablet) * ratio;
}
return sizes.desktop;
}
/**
* Calculate HUD height as percentage of screen height
* Ensures minimum and maximum bounds for usability
*
* @param height - Screen height in pixels
* @param percentage - Target percentage (0.0 - 1.0)
* @returns Calculated HUD height with bounds applied
*
* @example
* ```typescript
* const hudHeight = getHUDHeight(1080, 0.08); // ~86px (8% of 1080)
* const tooSmall = getHUDHeight(400, 0.08); // 40px (minimum applied)
* const tooLarge = getHUDHeight(3000, 0.08); // 120px (maximum applied)
* ```
*/
export function getHUDHeight(height: number, percentage: number): number {
return Math.max(40, Math.min(120, height * percentage));
}
/**
* Calculate padding based on resolution
*
* @param width - Screen width in pixels
* @returns Padding value in pixels
*
* @example
* ```typescript
* const padding = getResponsivePadding(375); // 8px (mobile)
* const padding = getResponsivePadding(1920); // 16px (desktop)
* ```
*/
export function getResponsivePadding(width: number): number {
return getResponsiveSize(width, { mobile: 8, tablet: 12, desktop: 16 });
}
/**
* Calculate font size based on resolution
*
* @param width - Screen width in pixels
* @returns Font size in pixels
*
* @example
* ```typescript
* const fontSize = getResponsiveFontSize(375); // 12px (mobile)
* const fontSize = getResponsiveFontSize(1920); // 16px (desktop)
* ```
*/
export function getResponsiveFontSize(width: number): number {
return getResponsiveSize(width, { mobile: 12, tablet: 14, desktop: 16 });
}
/**
* Determine if mobile controls should be shown
* NOTE: This is the ONLY valid use of isMobile prop
*
* @param width - Screen width in pixels
* @param isMobile - Optional mobile device flag
* @returns Whether to show mobile controls
*
* @example
* ```typescript
* const showControls = shouldShowMobileControls(500, false); // true (narrow screen)
* const showControls = shouldShowMobileControls(1920, false); // false (wide screen)
* const showControls = shouldShowMobileControls(1920, true); // true (mobile device)
* ```
*/
export function shouldShowMobileControls(width: number, isMobile: boolean = false): boolean {
return isMobile || width < BREAKPOINTS.mobile;
}
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