content: /*
   * Copyright 2010, 2011, 2012 mapsforge.org
   * Copyright 2013 Hannes Janetzek
   * Copyright 2016 devemux86
   *
   * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
   *
   * This program is free software: you can redistribute it and/or modify it under the
   * terms of the GNU Lesser General Public License as published by the Free Software
   * Foundation, either version 3 of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT ANY
   * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License along with
   * this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.oscim.theme.styles;
  
  import org.oscim.theme.ThemeCallback;
  
  import static org.oscim.backend.canvas.Color.parseColor;
  
  /**
   * A RenderInstruction is a basic graphical primitive to draw a map.
   */
  public abstract class RenderStyle<T extends RenderStyle<T>> {
  
      public abstract static class StyleBuilder<T extends StyleBuilder<T>> {
          public String cat;
          public String style;
  
          public int level;
  
          public int fillColor;
  
          public int strokeColor;
          public float strokeWidth;
  
          public ThemeCallback themeCallback;
  
          public T cat(String cat) {
              this.cat = cat;
              return self();
          }
  
          public T style(String style) {
              this.style = style;
              return self();
          }
  
          public T level(int level) {
              this.level = level;
              return self();
          }
  
          public T outline(int color, float width) {
              this.strokeColor = color;
              this.strokeWidth = width;
              return self();
          }
  
          public T strokeColor(int color) {
              this.strokeColor = color;
              return self();
          }
  
          public T strokeColor(String color) {
              this.strokeColor = parseColor(color);
              return self();
          }
  
          public T strokeWidth(float width) {
              this.strokeWidth = width;
              return self();
          }
  
          public T color(int color) {
              this.fillColor = color;
              return self();
          }
  
          public T color(String color) {
              this.fillColor = parseColor(color);
              return self();
          }
  
          public T themeCallback(ThemeCallback themeCallback) {
              this.themeCallback = themeCallback;
              return self();
          }
  
          @SuppressWarnings("unchecked")
          protected T self() {
              return (T) this;
          }
  
          public abstract RenderStyle build();
      }
  
      /**
       * Callback methods for rendering areas, ways and points of interest (POIs).
       */
      public interface Callback {
          /**
           * Renders an area with the given parameters.
           */
          void renderArea(AreaStyle area, int level);
  
          /**
           * Renders an extrusion with the given parameters.
           */
          void renderExtrusion(ExtrusionStyle extrusion, int level);
  
          /**
           * Renders a point of interest circle with the given parameters.
           *
           * @param circle the circle.
           * @param level  the drawing level on which the circle should be rendered.
           */
          void renderCircle(CircleStyle circle, int level);
  
          /**
           * Renders a point of interest symbol with the given bitmap.
           *
           * @param symbol the symbol to be rendered.
           */
          void renderSymbol(SymbolStyle symbol);
  
          /**
           * Renders a way with the given parameters.
           */
          void renderWay(LineStyle line, int level);
  
          /**
           * Renders a way with the given text along the way path.
           */
          void renderText(TextStyle text);
  
      }
  
      /**
       * Category
       */
      public String cat = null;
  
      RenderStyle mCurrent = this;
      RenderStyle mNext;
      boolean update;
  
      public T setCat(String cat) {
          this.cat = cat;
          return self();
      }
  
      @SuppressWarnings("unchecked")
      protected T self() {
          return (T) this;
      }
  
      public void set(RenderStyle next) {
          update = true;
          mNext = next;
      }
  
      public void unsetOverride() {
          update = true;
          mNext = null;
      }
  
      /**
       * Destroys this RenderInstruction and cleans up all its internal resources.
       */
      public void dispose() {
      }
  
      /**
       * @param renderCallback a reference to the receiver of all render callbacks.
       */
      public void renderNode(Callback renderCallback) {
      }
  
      /**
       * @param renderCallback a reference to the receiver of all render callbacks.
       */
      public void renderWay(Callback renderCallback) {
      }
  
      /**
       * Scales the text size of this RenderInstruction by the given factor.
       *
       * @param scaleFactor the factor by which the text size should be scaled.
       */
      public void scaleTextSize(float scaleFactor) {
      }
  
      public void update() {
          if (update) {
              update = false;
              mCurrent = mNext;
          }
      }
  
      public abstract RenderStyle current();
  }
  