CssShadow.java

/*******************************************************************************
 * Copyright (c) 2011, 2015 EclipseSource and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    EclipseSource - initial API and implementation
 ******************************************************************************/
package org.eclipse.rap.rwt.internal.theme;


public class CssShadow implements CssValue {

  public static final CssShadow NONE = new CssShadow( false, 0 , 0, 0, 0, null, 0 );

  public final boolean inset;
  public final int offsetX;
  public final int offsetY;
  public final int blur;
  public final int spread;
  public final String color;
  public final float opacity;

  private CssShadow( boolean inset,
                     int offsetX,
                     int offsetY,
                     int blur,
                     int spread,
                     String color,
                     float opacity )
  {
    this.inset = inset;
    this.offsetX = offsetX;
    this.offsetY = offsetY;
    this.blur = blur;
    this.spread = spread;
    this.color = color;
    this.opacity = opacity;
  }

  public static CssShadow create( boolean inset,
                                  int offsetX,
                                  int offsetY,
                                  int blur,
                                  int spread,
                                  CssColor color )
  {
    if( blur < 0 ) {
      String message = "Shadow blur distance can't be negative";
      throw new IllegalArgumentException( message );
    }
    if( spread != 0 ) {
      String message = "Shadow spread distance is not supported";
      throw new IllegalArgumentException( message );
    }
    if( color == null ) {
      throw new NullPointerException( "null argument" );
    }
    String htmlColor = CssColor.toHtmlString( color.red, color.green, color.blue );
    return new CssShadow( inset, offsetX, offsetY, blur, spread, htmlColor, color.alpha );
  }

  @Override
  public boolean equals( Object object ) {
    if( object == this ) {
      return true;
    }
    if( object instanceof CssShadow ) {
      CssShadow other = ( CssShadow )object;
      return    other.inset == inset
             && other.offsetX == offsetX
             && other.offsetY == offsetY
             && other.blur == blur
             && other.spread == spread
             && ( color == null ? other.color == null : color.equals( other.color ) )
             && other.opacity == opacity;
    }
    return false;
  }

  @Override
  public int hashCode() {
    int result = 17;
    result += 11 * result + offsetX;
    result += 11 * result + offsetY;
    result += 11 * result + blur;
    result += 11 * result + spread;
    if( color != null ) {
      result += 11 * result + color.hashCode();
    }
    result += 11 * result + Float.floatToIntBits( opacity );
    result += inset ? 0 : 11 * result + 13;
    return result;
  }

  @Override
  public String toDefaultString() {
    if( color == null ) {
      return "none";
    }
    CssColor qxColor = CssColor.valueOf( color );
    StringBuilder buffer = new StringBuilder();
    if( inset ) {
      buffer.append( "inset " );
    }
    return buffer
      .append( offsetX )
      .append( "px " )
      .append( offsetY )
      .append( "px " )
      .append( blur )
      .append( "px " )
      .append( spread )
      .append( "px " )
      .append( "rgba( " )
      .append( qxColor.red )
      .append( ", " )
      .append( qxColor.green )
      .append( ", " )
      .append( qxColor.blue )
      .append( ", " )
      .append( opacity )
      .append( " )" )
      .toString();
  }

  @Override
  public String toString() {
    return new StringBuilder()
      .append( "CssShadow{ " )
      .append( inset )
      .append( ", " )
      .append( offsetX )
      .append( ", " )
      .append( offsetY )
      .append( ", " )
      .append( blur )
      .append( ", " )
      .append( spread )
      .append( ", " )
      .append( color )
      .append( ", " )
      .append( opacity )
      .append( " }" )
      .toString();
  }

}