content: /*
   * Copyright 2002-2019 Drew Noakes and contributors
   *
   *    Licensed under the Apache License, Version 2.0 (the "License");
   *    you may not use this file except in compliance with the License.
   *    You may obtain a copy of the License at
   *
   *        https://www.apache.org/licenses/LICENSE-2.0
   *
   *    Unless required by applicable law or agreed to in writing, software
   *    distributed under the License is distributed on an "AS IS" BASIS,
   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *    See the License for the specific language governing permissions and
   *    limitations under the License.
   *
   * More information about this project is available at:
   *
   *    https://drewnoakes.com/code/exif/
   *    https://github.com/drewnoakes/metadata-extractor
   */
  
  package com.drew.metadata.photoshop;
  
  import com.drew.lang.annotations.NotNull;
  import com.drew.lang.annotations.Nullable;
  import com.drew.metadata.TagDescriptor;
  
  import static com.drew.metadata.photoshop.PsdHeaderDirectory.*;
  
  /**
   * @author Drew Noakes https://drewnoakes.com
   */
  @SuppressWarnings("WeakerAccess")
  public class PsdHeaderDescriptor extends TagDescriptor<PsdHeaderDirectory>
  {
      public PsdHeaderDescriptor(@NotNull PsdHeaderDirectory directory)
      {
          super(directory);
      }
  
      @Override
      public String getDescription(int tagType)
      {
          switch (tagType) {
              case TAG_CHANNEL_COUNT:
                  return getChannelCountDescription();
              case TAG_BITS_PER_CHANNEL:
                  return getBitsPerChannelDescription();
              case TAG_COLOR_MODE:
                  return getColorModeDescription();
              case TAG_IMAGE_HEIGHT:
                  return getImageHeightDescription();
              case TAG_IMAGE_WIDTH:
                  return getImageWidthDescription();
              default:
                  return super.getDescription(tagType);
          }
      }
  
      @Nullable
      public String getChannelCountDescription()
      {
          // Supported range is 1 to 56.
          Integer value = _directory.getInteger(TAG_CHANNEL_COUNT);
          if (value == null)
              return null;
          return value + " channel" + (value == 1 ? "" : "s");
      }
  
      @Nullable
      public String getBitsPerChannelDescription()
      {
          // Supported values are 1, 8, 16 and 32.
          Integer value = _directory.getInteger(TAG_BITS_PER_CHANNEL);
          if (value == null)
              return null;
          return value + " bit" + (value == 1 ? "" : "s") + " per channel";
      }
  
      @Nullable
      public String getColorModeDescription()
      {
          return getIndexedDescription(TAG_COLOR_MODE,
              "Bitmap",
              "Grayscale",
              "Indexed",
              "RGB",
              "CMYK",
              null,
              null,
              "Multichannel",
              "Duotone",
              "Lab");
      }
  
      @Nullable
      public String getImageHeightDescription()
      {
          Integer value = _directory.getInteger(TAG_IMAGE_HEIGHT);
          if (value == null)
              return null;
          return value + " pixel" + (value == 1 ? "" : "s");
      }
  
      @Nullable
      public String getImageWidthDescription()
      {
          try {
              Integer value = _directory.getInteger(TAG_IMAGE_WIDTH);
              if (value == null)
                  return null;
              return value + " pixel" + (value == 1 ? "" : "s");
          } catch (Exception e) {
              return null;
          }
      }
  }
  