src/main/java/charactermanaj/clipboardSupport/ImageSelection.java

   1 package charactermanaj.clipboardSupport;\r
   2 \r
   3 import java.awt.Color;\r
   4 import java.awt.datatransfer.Clipboard;\r
   5 import java.awt.datatransfer.DataFlavor;\r
   6 import java.awt.datatransfer.FlavorMap;\r
   7 import java.awt.datatransfer.SystemFlavorMap;\r
   8 import java.awt.datatransfer.Transferable;\r
   9 import java.awt.datatransfer.UnsupportedFlavorException;\r
  10 import java.awt.image.BufferedImage;\r
  11 import java.io.ByteArrayInputStream;\r
  12 import java.io.ByteArrayOutputStream;\r
  13 import java.io.IOException;\r
  14 import java.io.InputStream;\r
  15 import java.util.Arrays;\r
  16 import java.util.List;\r
  17 import java.util.logging.Level;\r
  18 import java.util.logging.Logger;\r
  19 \r
  20 import javax.imageio.ImageIO;\r
  21 \r
  22 import charactermanaj.graphics.io.ImageSaveHelper;\r
  23 import charactermanaj.model.AppConfig;\r
  24 \r
  25 /**\r
  26  * クリップボードに画像をコピーするためのセレクション.<br>\r
  27  * @author seraphy\r
  28  */\r
  29 public class ImageSelection implements Transferable {\r
  30         \r
  31         /**\r
  32          * ロガー\r
  33          */\r
  34         private static final Logger logger = Logger.getLogger(ImageSelection.class.getName());\r
  35 \r
  36         /**\r
  37          * 実行環境がWindowsであるか?\r
  38          */\r
  39         private static final boolean platformWindows;\r
  40         \r
  41         /**\r
  42          * 対象となるイメージ\r
  43          */\r
  44         private BufferedImage img;\r
  45         \r
  46         /**\r
  47          * 背景色(jpeg画像変換時)\r
  48          */\r
  49         private Color bgColor;\r
  50         \r
  51         /**\r
  52          * MIME汎用(PNG).\r
  53          */\r
  54     private static final DataFlavor PNG_FLAVOR = new DataFlavor("image/png", "image/png");\r
  55 \r
  56         /**\r
  57          * MIME汎用(JPEG).\r
  58          */\r
  59     private static final DataFlavor JPEG_FLAVOR = new DataFlavor("image/jpeg", "image/jpeg");\r
  60     \r
  61         /**\r
  62          * MIME汎用(BMP).\r
  63          */\r
  64     private static final DataFlavor BMP_FLAVOR = new DataFlavor("image/bmp", "image/bmp");\r
  65     \r
  66 \r
  67     /**\r
  68      * サポートされている形式.<br>\r
  69      * 順序は優先順.<br>\r
  70      */\r
  71     private static final List<DataFlavor> SUPPORTED_FLAVORS;\r
  72     \r
  73     /**\r
  74      * クラスイニシャライザ\r
  75      */\r
  76     static {\r
  77         String lcOS = System.getProperty("os.name").toLowerCase(); \r
  78         platformWindows = lcOS.indexOf("windows") >= 0;\r
  79         if (platformWindows) {\r
  80                 // Windowsの場合\r
  81                 SUPPORTED_FLAVORS = Arrays.asList(new DataFlavor[] {\r
  82                                 PNG_FLAVOR,\r
  83                                 DataFlavor.imageFlavor,\r
  84                 });\r
  85 \r
  86         } else {\r
  87                 // Linux, Mac OS Xの場合を想定\r
  88                 SUPPORTED_FLAVORS = Arrays.asList(new DataFlavor[] {\r
  89                                 PNG_FLAVOR,\r
  90                                 JPEG_FLAVOR,\r
  91                                 BMP_FLAVOR,\r
  92                                 DataFlavor.imageFlavor,\r
  93                 });\r
  94         }\r
  95     }\r
  96 \r
  97     /**\r
  98      * システムのフレーバーマップを設定する.<br>\r
  99      * @return 正常にセットアップできた場合はtrue、そうでなければfalse\r
 100      */\r
 101     public static boolean setupSystemFlavorMap() {\r
 102         try {\r
 103                         AppConfig appConfig = AppConfig.getInstance();\r
 104                         if (appConfig.isEnablePNGSupportForWindows()) {\r
 105                         // "PNG"へのマップを明示的に設定する.\r
 106                         // (Windowsの場合、デフォルトでは、画像はDBI転送となり透過情報を持つことができないため.)\r
 107                         FlavorMap defFlavorMap = SystemFlavorMap.getDefaultFlavorMap();\r
 108                         if (defFlavorMap instanceof SystemFlavorMap) {\r
 109                                 SystemFlavorMap sysFlavorMap = (SystemFlavorMap) defFlavorMap;\r
 110                                         sysFlavorMap.setNativesForFlavor(PNG_FLAVOR, new String[] {"PNG"});\r
 111                                         sysFlavorMap.setNativesForFlavor(JPEG_FLAVOR, new String[] {"JFIF"});\r
 112                         }\r
 113                         }\r
 114                 return true;\r
 115 \r
 116         } catch (Exception ex) {\r
 117                 logger.log(Level.SEVERE, "systemFlavorMap setup failed.", ex);\r
 118         }\r
 119         return false;\r
 120     }\r
 121     \r
 122         /**\r
 123          * セレクションを構築する.\r
 124          * @param img 対象となるイメージ\r
 125          */\r
 126         public ImageSelection(BufferedImage img, Color bgColor) {\r
 127                 if (img == null) {\r
 128                         throw new IllegalArgumentException();\r
 129                 }\r
 130                 this.img = img;\r
 131                 this.bgColor = (bgColor == null) ? Color.white : bgColor;\r
 132         }\r
 133         \r
 134         public Object getTransferData(DataFlavor flavor)\r
 135                         throws UnsupportedFlavorException, IOException {\r
 136                 if (flavor != null) {\r
 137                         logger.log(Level.FINE, "getTransferData flavor=" + flavor);\r
 138                         try {\r
 139                                 ImageSaveHelper imageSaveHelper = new ImageSaveHelper();\r
 140         \r
 141                                 if (flavor.equals(PNG_FLAVOR) || flavor.equals(JPEG_FLAVOR) || flavor.equals(BMP_FLAVOR)) {\r
 142                                         // image/png, image/jpeg, image/bmpの場合は、\r
 143                                         // そのファイル形式のデータを生成して、それを返す.\r
 144                                     ByteArrayOutputStream bos = new ByteArrayOutputStream();\r
 145                                     try {\r
 146                                         imageSaveHelper.savePicture(img, bgColor, bos, flavor.getMimeType(), null);\r
 147 \r
 148                                     } finally {\r
 149                                         bos.close();\r
 150                                     }\r
 151                                 return new ByteArrayInputStream(bos.toByteArray());\r
 152                                 }\r
 153 \r
 154                                 if (flavor.equals(DataFlavor.imageFlavor)) {\r
 155                                         // "image/x-java-image"の場合\r
 156                                 AppConfig appConfig = AppConfig.getInstance();\r
 157                                 if (platformWindows || !appConfig.isEnablePNGSupportForWindows()) {\r
 158                                                 // Windowsの場合は、背景色で塗りつぶしたBMP画像に変換して返す. \r
 159                                                 // JDK5/6のシステムクリップボードへのコピーでは透過画像をサポートしておらず透過部分が黒色になるため.\r
 160                                         // ネイティブPNGとのマッピングが有効であれば、Windowsでは、そちらで対応する.\r
 161                                                 return imageSaveHelper.createBMPFormatPicture(img, bgColor);\r
 162 \r
 163                                 } else {\r
 164                                         // Windows以外、且つ、透過サポートが有効の場合\r
 165                                         return img;\r
 166                                 }\r
 167                                 }\r
 168         \r
 169                         } catch (RuntimeException ex) {\r
 170                                 logger.log(Level.WARNING, "The exception occurred during the data transfer of a clipboard.", ex);\r
 171                                 throw ex;\r
 172                                 \r
 173                         } catch (IOException ex) {\r
 174                                 logger.log(Level.WARNING, "The exception occurred during the data transfer of a clipboard.", ex);\r
 175                                 throw ex;\r
 176                         }\r
 177                 }\r
 178                 \r
 179                 throw new UnsupportedFlavorException(flavor);\r
 180         }\r
 181 \r
 182         public DataFlavor[] getTransferDataFlavors() {\r
 183                 return SUPPORTED_FLAVORS.toArray(new DataFlavor[SUPPORTED_FLAVORS.size()]);\r
 184         }\r
 185 \r
 186         public boolean isDataFlavorSupported(DataFlavor flavor) {\r
 187                 return flavor != null && SUPPORTED_FLAVORS.contains(flavor);\r
 188         }\r
 189         \r
 190         public static boolean isSupprotedFlavorAvailable(Clipboard cb) {\r
 191                 if (cb != null) {\r
 192                         for (DataFlavor flavor : SUPPORTED_FLAVORS) {\r
 193                                 if (cb.isDataFlavorAvailable(flavor)) {\r
 194                                         return true;\r
 195                                 }\r
 196                         }\r
 197                 }\r
 198                 return false;\r
 199         }\r
 200         \r
 201         public static BufferedImage getImage(Clipboard cb) throws IOException {\r
 202                 if (cb == null) {\r
 203                         return null;\r
 204                 }\r
 205                 try {\r
 206                         // サポートされている形式をチェックする.\r
 207                         for (DataFlavor flavor : cb.getAvailableDataFlavors()) {\r
 208                                 logger.log(Level.FINE, "dataFlavor(in Clipboard)=" + flavor);\r
 209                         }\r
 210                         DataFlavor availableFlavor = null;\r
 211                         for (DataFlavor flavor : SUPPORTED_FLAVORS) {\r
 212                                 // 優先順にチェックし最初に見つかったサポートされている形式を採用する.\r
 213                                 if (cb.isDataFlavorAvailable(flavor)) {\r
 214                                         availableFlavor = flavor;\r
 215                                         break;\r
 216                                 }\r
 217                         }\r
 218                         logger.log(Level.FINE, "selected flavor=" + availableFlavor);\r
 219                         if (availableFlavor != null) {\r
 220                                 \r
 221                                 if (availableFlavor.equals(DataFlavor.imageFlavor)) {\r
 222                                         // 汎用の画像形式で取得を試みる。\r
 223                                         // 透過画像は使えないため、ここで取得されるものは非透過画像である。\r
 224                                         return (BufferedImage) cb.getData(DataFlavor.imageFlavor);\r
 225                                 }\r
 226                                 \r
 227                                 if (availableFlavor.equals(PNG_FLAVOR)\r
 228                                                 || availableFlavor.equals(JPEG_FLAVOR)\r
 229                                                 || availableFlavor.equals(BMP_FLAVOR)) {\r
 230                                         // image/png, image/bmp, image/jpegのいずれか\r
 231                                         \r
 232                                         InputStream is = (InputStream) cb.getData(availableFlavor);\r
 233                                         if (is != null) {\r
 234                                                 BufferedImage img;\r
 235                                                 try {\r
 236                                                         img = ImageIO.read(is);\r
 237                                                 } finally {\r
 238                                                         is.close();\r
 239                                                 }\r
 240                                                 return img;\r
 241                                         }\r
 242                                 }\r
 243                         }\r
 244 \r
 245                 } catch (IOException ex) {\r
 246                         logger.log(Level.WARNING, "The exception occurred in access to a clipboard.", ex);\r
 247                         throw ex;\r
 248 \r
 249                 } catch (UnsupportedFlavorException ex) {\r
 250                         // 直前にisDataFlavorAvailableで確認しているので、\r
 251                         // よほどタイミングが悪くなければエラーは発生しないはず。\r
 252                         logger.log(Level.WARNING, "The exception occurred in access to a clipboard.", ex);\r
 253                         throw new IOException(ex.getMessage());\r
 254                 }\r
 255 \r
 256                 // サポートしているものが無い場合.\r
 257                 return null;\r
 258         }\r
 259 }\r