Platform and Utilities

/**
 * Service for platform and browser detection
 */
class Platform {
  /** Whether the code is running in a browser environment */
  isBrowser: boolean;
  
  /** Whether the browser is Microsoft Edge */
  EDGE: boolean;
  
  /** Whether the browser uses the Trident rendering engine (Internet Explorer) */
  TRIDENT: boolean;
  
  /** Whether the browser uses the Blink rendering engine (Chrome, Edge, Opera) */
  BLINK: boolean;
  
  /** Whether the browser uses the WebKit rendering engine (Safari, older Chrome) */
  WEBKIT: boolean;
  
  /** Whether the platform is iOS */
  IOS: boolean;
  
  /** Whether the browser is Firefox */
  FIREFOX: boolean;
  
  /** Whether the platform is Android */
  ANDROID: boolean;
  
  /** Whether the browser is Safari */
  SAFARI: boolean;
}

import { Platform } from '@angular/cdk/platform';

constructor(private platform: Platform) {
  if (this.platform.isBrowser) {
    // Browser-specific code
    if (this.platform.IOS) {
      // iOS-specific behavior
    }
    
    if (this.platform.ANDROID) {
      // Android-specific behavior
    }
  }
}

/**
 * Check if passive event listeners are supported
 * @returns True if passive event listeners are supported
 */
function supportsPassiveEventListeners(): boolean;

/**
 * Check if CSS scroll-behavior is supported
 * @returns True if scroll-behavior is supported
 */
function supportsScrollBehavior(): boolean;

/**
 * Get the level of Shadow DOM support
 * @returns Shadow DOM support level
 */
function getShadowDomSupportLevel(): ShadowDomVersion;

/**
 * Get the RTL scroll axis type for the current browser
 * @returns RTL scroll axis type
 */
function getRtlScrollAxisType(): RtlScrollAxisType;

/**
 * Normalize passive listener options based on browser support
 * @param options - Listener options
 * @returns Normalized options
 */
function normalizePassiveListenerOptions(options: AddEventListenerOptions): AddEventListenerOptions | boolean;

/**
 * Shadow DOM support levels
 */
const enum ShadowDomVersion {
  NONE,
  V0,
  V1
}

/**
 * RTL scroll axis types
 */
const enum RtlScrollAxisType {
  NORMAL,
  NEGATED,
  INVERTED
}

/**
 * Coerce a value to a boolean
 * @param value - Value to coerce
 * @returns Boolean representation of the value
 */
function coerceBooleanProperty(value: any): boolean;

/**
 * Coerce a value to a number
 * @param value - Value to coerce
 * @param fallback - Fallback value if coercion fails
 * @returns Number representation of the value or fallback
 */
function coerceNumberProperty(value: any, fallback?: number): number;

/**
 * Coerce a value to an array
 * @param value - Value to coerce
 * @returns Array containing the value or the value if already an array
 */
function coerceArray<T>(value: T | T[]): T[];

/**
 * Coerce a value to a CSS pixel value string
 * @param value - Value to coerce
 * @returns CSS pixel value string
 */
function coerceCssPixelValue(value: any): string;

/**
 * Coerce an ElementRef or Element to Element
 * @param elementOrRef - ElementRef or Element
 * @returns The underlying Element
 */
function coerceElement<T>(elementOrRef: ElementRef<T> | T): T;

/**
 * Coerce a string or string array to string array
 * @param value - Value to coerce
 * @returns String array
 */
function coerceStringArray(value: string | string[]): string[];

/**
 * Input types that can be coerced to boolean
 */
type BooleanInput = string | boolean | null | undefined;

/**
 * Input types that can be coerced to number
 */
type NumberInput = string | number | null | undefined;

import { coerceBooleanProperty, coerceNumberProperty } from '@angular/cdk/coercion';

@Component({
  selector: 'app-example'
})
export class ExampleComponent {
  private _disabled = false;
  private _size = 0;

  @Input()
  get disabled(): boolean {
    return this._disabled;
  }
  set disabled(value: BooleanInput) {
    this._disabled = coerceBooleanProperty(value);
  }

  @Input()
  get size(): number {
    return this._size;
  }
  set size(value: NumberInput) {
    this._size = coerceNumberProperty(value, 10);
  }
}

// Navigation keys
const TAB = 9;
const ENTER = 13;
const ESCAPE = 27;
const SPACE = 32;
const PAGE_UP = 33;
const PAGE_DOWN = 34;
const END = 35;
const HOME = 36;
const LEFT_ARROW = 37;
const UP_ARROW = 38;
const RIGHT_ARROW = 39;
const DOWN_ARROW = 40;

// Edit keys
const BACKSPACE = 8;
const DELETE = 46;

// Letter keys
const A = 65;
const B = 66;
// ... continues through Z = 90

// Number keys
const ZERO = 48;
const ONE = 49;
// ... continues through NINE = 57

// Function keys
const F1 = 112;
const F2 = 113;
// ... continues through F12 = 123

// Punctuation keys
const COMMA = 188;
const SEMICOLON = 186;
const EQUALS = 187;
const DASH = 189;
const PERIOD = 190;
const SLASH = 191;

/**
 * Check if a keyboard event has modifier keys pressed
 * @param event - Keyboard event
 * @param modifiers - Modifier keys to check for
 * @returns True if any of the specified modifiers are pressed
 */
function hasModifierKey(event: KeyboardEvent, ...modifiers: ModifierKey[]): boolean;

/**
 * Modifier key types
 */
type ModifierKey = 'altKey' | 'shiftKey' | 'ctrlKey' | 'metaKey';

import { ENTER, SPACE, hasModifierKey } from '@angular/cdk/keycodes';

@HostListener('keydown', ['$event'])
onKeyDown(event: KeyboardEvent) {
  switch (event.keyCode) {
    case ENTER:
    case SPACE:
      if (!hasModifierKey(event, 'altKey', 'shiftKey')) {
        this.activate();
        event.preventDefault();
      }
      break;
  }
}

/**
 * Service for clipboard operations
 */
class Clipboard {
  /**
   * Copy text to the clipboard
   * @param text - Text to copy
   * @returns True if copy was successful
   */
  copy(text: string): boolean;
  
  /**
   * Begin a copy operation (for advanced use cases)
   * @param text - Text to copy
   * @returns PendingCopy instance for managing the operation
   */
  beginCopy(text: string): PendingCopy;
}

/**
 * Class for managing pending copy operations
 */
class PendingCopy {
  /**
   * Execute the copy operation
   * @returns True if copy was successful
   */
  copy(): boolean;
  
  /**
   * Clean up resources
   */
  destroy(): void;
}

/**
 * Directive for copying text to clipboard
 */
@Directive({
  selector: '[cdkCopyToClipboard]'
})
class CdkCopyToClipboard {
  /** Text to copy to clipboard */
  @Input('cdkCopyToClipboard') text: string;
  
  /** Number of copy attempts before giving up */
  @Input('cdkCopyToClipboardAttempts') attempts: number = 1;
  
  /** Event emitted after copy attempt */
  @Output('cdkCopyToClipboardCopied') copied: EventEmitter<boolean> = new EventEmitter<boolean>();
}

import { Clipboard } from '@angular/cdk/clipboard';

constructor(private clipboard: Clipboard) {}

copyToClipboard(text: string) {
  const successful = this.clipboard.copy(text);
  if (successful) {
    console.log('Text copied to clipboard');
  }
}

/**
 * Service for detecting and managing text direction
 */
class Directionality implements OnDestroy {
  /** Current text direction */
  value: Direction;
  
  /** Observable that emits when direction changes */
  change: Observable<Direction>;
  
  ngOnDestroy(): void;
}

/**
 * Text direction values
 */
type Direction = 'ltr' | 'rtl';

/**
 * Directive for setting text direction
 */
@Directive({
  selector: '[dir]'
})
class Dir {
  /** Text direction */
  @Input() dir: Direction;
  
  /** Event emitted when direction changes */
  @Output() dirChange: EventEmitter<Direction>;
}

/**
 * Injection token for document reference
 */
const DIR_DOCUMENT: InjectionToken<Document>;

/**
 * Service for observing viewport breakpoints
 */
class BreakpointObserver implements OnDestroy {
  /**
   * Observe breakpoint changes
   * @param value - Breakpoint query or queries to observe
   * @returns Observable that emits breakpoint state changes
   */
  observe(value: string | string[]): Observable<BreakpointState>;
  
  /**
   * Check if breakpoint currently matches
   * @param value - Breakpoint query or queries to check
   * @returns True if breakpoint matches
   */
  isMatched(value: string | string[]): boolean;
  
  ngOnDestroy(): void;
}

/**
 * Result of breakpoint observation
 */
interface BreakpointState {
  /** Whether the breakpoint matches */
  matches: boolean;
  
  /** Map of individual breakpoint query results */
  breakpoints: {
    [key: string]: boolean;
  };
}

/**
 * Service for media query matching
 */
class MediaMatcher {
  /**
   * Create a MediaQueryList for the given query
   * @param query - CSS media query
   * @returns MediaQueryList instance
   */
  matchMedia(query: string): MediaQueryList;
}

/**
 * Predefined breakpoint constants
 */
const Breakpoints = {
  XSmall: '(max-width: 599.98px)',
  Small: '(min-width: 600px) and (max-width: 959.98px)',
  Medium: '(min-width: 960px) and (max-width: 1279.98px)',
  Large: '(min-width: 1280px) and (max-width: 1919.98px)',
  XLarge: '(min-width: 1920px)',
  
  Handset: '(max-width: 599.98px) and (orientation: portrait), (max-width: 959.98px) and (orientation: landscape)',
  Tablet: '(min-width: 600px) and (max-width: 839.98px) and (orientation: portrait), (min-width: 960px) and (max-width: 1279.98px) and (orientation: landscape)',
  Web: '(min-width: 840px) and (orientation: portrait), (min-width: 1280px) and (orientation: landscape)',
  
  HandsetPortrait: '(max-width: 599.98px) and (orientation: portrait)',
  TabletPortrait: '(min-width: 600px) and (max-width: 839.98px) and (orientation: portrait)',
  WebPortrait: '(min-width: 840px) and (orientation: portrait)',
  
  HandsetLandscape: '(max-width: 959.98px) and (orientation: landscape)',
  TabletLandscape: '(min-width: 960px) and (max-width: 1279.98px) and (orientation: landscape)',
  WebLandscape: '(min-width: 1280px) and (orientation: landscape)'
};

import { BreakpointObserver, Breakpoints } from '@angular/cdk/layout';

constructor(private breakpointObserver: BreakpointObserver) {
  this.isHandset$ = this.breakpointObserver.observe(Breakpoints.Handset)
    .pipe(
      map(result => result.matches)
    );
}

/**
 * Module for platform detection functionality
 */
@NgModule({})
class PlatformModule {}

/**
 * Module for clipboard functionality
 */
@NgModule({
  declarations: [CdkCopyToClipboard],
  exports: [CdkCopyToClipboard]
})
class ClipboardModule {}

/**
 * Module for bidirectional text support
 */
@NgModule({
  declarations: [Dir],
  exports: [Dir]
})
class BidiModule {}

/**
 * Module for layout and breakpoint functionality
 */
@NgModule({})
class LayoutModule {}

import { BreakpointObserver, Breakpoints } from '@angular/cdk/layout';
import { map } from 'rxjs/operators';

@Component({
  selector: 'app-responsive',
  template: `
    <div [class.mobile]="isHandset$ | async">
      Content adapts to screen size
    </div>
  `
})
export class ResponsiveComponent {
  isHandset$ = this.breakpointObserver.observe(Breakpoints.Handset)
    .pipe(map(result => result.matches));

  constructor(private breakpointObserver: BreakpointObserver) {}
}

import { Platform } from '@angular/cdk/platform';

@Injectable()
export class StorageService {
  constructor(private platform: Platform) {}

  setItem(key: string, value: string): void {
    if (this.platform.isBrowser) {
      localStorage.setItem(key, value);
    }
  }

  getItem(key: string): string | null {
    if (this.platform.isBrowser) {
      return localStorage.getItem(key);
    }
    return null;
  }
}

import { coerceBooleanProperty, coerceNumberProperty, BooleanInput, NumberInput } from '@angular/cdk/coercion';

@Component({
  selector: 'app-configurable'
})
export class ConfigurableComponent {
  private _disabled = false;
  private _tabIndex = 0;

  @Input()
  get disabled(): boolean {
    return this._disabled;
  }
  set disabled(value: BooleanInput) {
    this._disabled = coerceBooleanProperty(value);
  }

  @Input()
  get tabIndex(): number {
    return this._tabIndex;
  }
  set tabIndex(value: NumberInput) {
    this._tabIndex = coerceNumberProperty(value, 0);
  }
}