CmsLink.java

   1 package org.argeo.cms.util;
   2
   3 import java.io.InputStream;
   4 import java.net.MalformedURLException;
   5 import java.net.URL;
   6
   7 import javax.jcr.Node;
   8
   9 import org.apache.commons.io.IOUtils;
  10 import org.apache.commons.logging.Log;
  11 import org.apache.commons.logging.LogFactory;
  12 import org.argeo.cms.CmsException;
  13 import org.argeo.cms.CmsStyles;
  14 import org.argeo.cms.CmsUiProvider;
  15 import org.eclipse.gemini.blueprint.context.BundleContextAware;
  16 import org.eclipse.rap.rwt.RWT;
  17 import org.eclipse.rap.rwt.service.ResourceManager;
  18 import org.eclipse.swt.SWT;
  19 import org.eclipse.swt.events.MouseListener;
  20 import org.eclipse.swt.graphics.ImageData;
  21 import org.eclipse.swt.layout.GridData;
  22 import org.eclipse.swt.widgets.Composite;
  23 import org.eclipse.swt.widgets.Control;
  24 import org.eclipse.swt.widgets.Label;
  25 import org.osgi.framework.BundleContext;
  26 import org.springframework.beans.factory.InitializingBean;
  27
  28 /** A link to an internal or external location. */
  29 public class CmsLink implements CmsUiProvider, InitializingBean,
  30                 BundleContextAware {
  31         private final static Log log = LogFactory.getLog(CmsLink.class);
  32
  33         private String label;
  34         private String custom;
  35         private String target;
  36         private String image;
  37         private MouseListener mouseListener;
  38
  39         private int verticalAlignment = SWT.CENTER;
  40
  41         // internal
  42         //private Boolean isUrl = false;
  43         private Integer imageWidth, imageHeight;
  44
  45         private BundleContext bundleContext;
  46
  47         public CmsLink() {
  48                 super();
  49         }
  50
  51         public CmsLink(String label, String target) {
  52                 this(label, target, null);
  53         }
  54
  55         public CmsLink(String label, String target, String custom) {
  56                 super();
  57                 this.label = label;
  58                 this.target = target;
  59                 this.custom = custom;
  60                 afterPropertiesSet();
  61         }
  62
  63         @Override
  64         public void afterPropertiesSet() {
  65 //              if (target != null) {
  66 //                      if (target.startsWith("/")) {
  67 //                              isUrl = true;
  68 //                      } else {
  69 //                              try {
  70 //                                      new URL(target);
  71 //                                      isUrl = true;
  72 //                              } catch (MalformedURLException e1) {
  73 //                                      isUrl = false;
  74 //                              }
  75 //                      }
  76 //              }
  77
  78                 if (image != null) {
  79                         ImageData image = loadImage();
  80                         imageWidth = image.width;
  81                         imageHeight = image.height;
  82                 }
  83         }
  84
  85         @Override
  86         public Control createUi(final Composite parent, Node context) {
  87                 Composite comp = new Composite(parent, SWT.BOTTOM);
  88                 comp.setLayout(CmsUtils.noSpaceGridLayout());
  89
  90                 Label link = new Label(comp, SWT.NONE);
  91                 link.setData(RWT.MARKUP_ENABLED, Boolean.TRUE);
  92                 GridData layoutData = new GridData(SWT.CENTER, verticalAlignment, true,
  93                                 true);
  94                 if (image != null) {
  95                         layoutData.heightHint = imageHeight;
  96                         if (label == null)
  97                                 layoutData.widthHint = imageWidth;
  98                 }
  99
 100                 link.setLayoutData(layoutData);
 101                 if (custom != null) {
 102                         comp.setData(RWT.CUSTOM_VARIANT, custom);
 103                         link.setData(RWT.CUSTOM_VARIANT, custom);
 104                 } else {
 105                         comp.setData(RWT.CUSTOM_VARIANT, CmsStyles.CMS_LINK);
 106                         link.setData(RWT.CUSTOM_VARIANT, CmsStyles.CMS_LINK);
 107                 }
 108
 109                 // label
 110                 StringBuilder labelText = new StringBuilder();
 111                 if (target != null) {
 112                         labelText
 113                                         .append("<a style='color:inherit;text-decoration:inherit;' href=\"");
 114 //                      if (!isUrl)
 115 //                              labelText.append('#');
 116                         labelText.append(target);
 117                         labelText.append("\">");
 118                 }
 119                 if (image != null) {
 120                         registerImageIfNeeded();
 121                         String imageLocation = RWT.getResourceManager().getLocation(image);
 122                         labelText.append("<img width='").append(imageWidth)
 123                                         .append("' height='").append(imageHeight)
 124                                         .append("' src=\"").append(imageLocation).append("\"/>");
 125
 126                         // final Image img = loadImage(parent.getDisplay());
 127                         // link.setImage(img);
 128                         // link.addDisposeListener(new DListener(img));
 129                 }
 130
 131                 if (label != null) {
 132                         // link.setText(label);
 133                         labelText.append(' ').append(label);
 134                 }
 135
 136                 if (target != null)
 137                         labelText.append("</a>");
 138
 139                 link.setText(labelText.toString());
 140
 141                 // link.setCursor(link.getDisplay().getSystemCursor(SWT.CURSOR_HAND));
 142                 // CmsSession cmsSession = (CmsSession) parent.getDisplay().getData(
 143                 // CmsSession.KEY);
 144                 if (mouseListener != null)
 145                         link.addMouseListener(mouseListener);
 146
 147                 return comp;
 148         }
 149
 150         private void registerImageIfNeeded() {
 151                 ResourceManager resourceManager = RWT.getResourceManager();
 152                 if (!resourceManager.isRegistered(image)) {
 153                         URL res = getImageUrl();
 154                         InputStream inputStream = null;
 155                         try {
 156                                 IOUtils.closeQuietly(inputStream);
 157                                 inputStream = res.openStream();
 158                                 resourceManager.register(image, inputStream);
 159                                 if (log.isTraceEnabled())
 160                                         log.trace("Registered image " + image);
 161                         } catch (Exception e) {
 162                                 throw new CmsException("Cannot load image " + image, e);
 163                         } finally {
 164                                 IOUtils.closeQuietly(inputStream);
 165                         }
 166                 }
 167         }
 168
 169         private ImageData loadImage() {
 170                 URL url = getImageUrl();
 171                 ImageData result = null;
 172                 InputStream inputStream = null;
 173                 try {
 174                         inputStream = url.openStream();
 175                         result = new ImageData(inputStream);
 176                         if (log.isTraceEnabled())
 177                                 log.trace("Loaded image " + image);
 178                 } catch (Exception e) {
 179                         throw new CmsException("Cannot load image " + image, e);
 180                 } finally {
 181                         IOUtils.closeQuietly(inputStream);
 182                 }
 183                 return result;
 184         }
 185
 186         private URL getImageUrl() {
 187                 URL url;
 188                 try {
 189                         // pure URL
 190                         url = new URL(image);
 191                 } catch (MalformedURLException e1) {
 192                         // in OSGi bundle
 193                         if (bundleContext == null)
 194                                 throw new CmsException("No bundle context available");
 195                         url = bundleContext.getBundle().getResource(image);
 196                 }
 197
 198                 if (url == null)
 199                         throw new CmsException("No image " + image + " available.");
 200
 201                 return url;
 202         }
 203
 204         public void setLabel(String label) {
 205                 this.label = label;
 206         }
 207
 208         public void setCustom(String custom) {
 209                 this.custom = custom;
 210         }
 211
 212         public void setTarget(String target) {
 213                 this.target = target;
 214                 // try {
 215                 // new URL(target);
 216                 // isUrl = true;
 217                 // } catch (MalformedURLException e1) {
 218                 // isUrl = false;
 219                 // }
 220         }
 221
 222         public void setImage(String image) {
 223                 this.image = image;
 224         }
 225
 226         @Override
 227         public void setBundleContext(BundleContext bundleContext) {
 228                 this.bundleContext = bundleContext;
 229         }
 230
 231         public void setMouseListener(MouseListener mouseListener) {
 232                 this.mouseListener = mouseListener;
 233         }
 234
 235         public void setvAlign(String vAlign) {
 236                 if ("bottom".equals(vAlign)) {
 237                         verticalAlignment = SWT.BOTTOM;
 238                 } else if ("top".equals(vAlign)) {
 239                         verticalAlignment = SWT.TOP;
 240                 } else if ("center".equals(vAlign)) {
 241                         verticalAlignment = SWT.CENTER;
 242                 } else {
 243                         throw new CmsException("Unsupported vertical allignment " + vAlign
 244                                         + " (must be: top, bottom or center)");
 245                 }
 246         }
 247
 248         // private class MListener extends MouseAdapter {
 249         // private static final long serialVersionUID = 3634864186295639792L;
 250         //
 251         // @Override
 252         // public void mouseDown(MouseEvent e) {
 253         // if (e.button == 1) {
 254         // }
 255         // }
 256         // }
 257         //
 258         // private class DListener implements DisposeListener {
 259         // private static final long serialVersionUID = -3808587499269394812L;
 260         // private final Image img;
 261         //
 262         // public DListener(Image img) {
 263         // super();
 264         // this.img = img;
 265         // }
 266         //
 267         // @Override
 268         // public void widgetDisposed(DisposeEvent event) {
 269         // img.dispose();
 270         // }
 271         //
 272         // }
 273 }