org.argeo.cms/src/org/argeo/cms/CmsLink.java

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