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         /** @return {@link Composite} with a single {@link Label} child. */
  86         @Override
  87         public Control createUi(final Composite parent, Node context) {
  88                 Composite comp = new Composite(parent, SWT.BOTTOM);
  89                 comp.setLayout(CmsUtils.noSpaceGridLayout());
  90
  91                 Label link = new Label(comp, SWT.NONE);
  92                 link.setData(RWT.MARKUP_ENABLED, Boolean.TRUE);
  93                 GridData layoutData = new GridData(SWT.CENTER, verticalAlignment, true,
  94                                 true);
  95                 if (image != null) {
  96                         layoutData.heightHint = imageHeight;
  97                         if (label == null)
  98                                 layoutData.widthHint = imageWidth;
  99                 }
 100
 101                 link.setLayoutData(layoutData);
 102                 if (custom != null) {
 103                         comp.setData(RWT.CUSTOM_VARIANT, custom);
 104                         link.setData(RWT.CUSTOM_VARIANT, custom);
 105                 } else {
 106                         comp.setData(RWT.CUSTOM_VARIANT, CmsStyles.CMS_LINK);
 107                         link.setData(RWT.CUSTOM_VARIANT, CmsStyles.CMS_LINK);
 108                 }
 109
 110                 // label
 111                 StringBuilder labelText = new StringBuilder();
 112                 if (target != null) {
 113                         labelText
 114                                         .append("<a style='color:inherit;text-decoration:inherit;' href=\"");
 115                         // if (!isUrl)
 116                         // labelText.append('#');
 117                         labelText.append(target);
 118                         labelText.append("\">");
 119                 }
 120                 if (image != null) {
 121                         registerImageIfNeeded();
 122                         String imageLocation = RWT.getResourceManager().getLocation(image);
 123                         labelText.append("<img width='").append(imageWidth)
 124                                         .append("' height='").append(imageHeight)
 125                                         .append("' src=\"").append(imageLocation).append("\"/>");
 126
 127                         // final Image img = loadImage(parent.getDisplay());
 128                         // link.setImage(img);
 129                         // link.addDisposeListener(new DListener(img));
 130                 }
 131
 132                 if (label != null) {
 133                         // link.setText(label);
 134                         labelText.append(' ').append(label);
 135                 }
 136
 137                 if (target != null)
 138                         labelText.append("</a>");
 139
 140                 link.setText(labelText.toString());
 141
 142                 // link.setCursor(link.getDisplay().getSystemCursor(SWT.CURSOR_HAND));
 143                 // CmsSession cmsSession = (CmsSession) parent.getDisplay().getData(
 144                 // CmsSession.KEY);
 145                 if (mouseListener != null)
 146                         link.addMouseListener(mouseListener);
 147
 148                 return comp;
 149         }
 150
 151         private void registerImageIfNeeded() {
 152                 ResourceManager resourceManager = RWT.getResourceManager();
 153                 if (!resourceManager.isRegistered(image)) {
 154                         URL res = getImageUrl();
 155                         InputStream inputStream = null;
 156                         try {
 157                                 IOUtils.closeQuietly(inputStream);
 158                                 inputStream = res.openStream();
 159                                 resourceManager.register(image, inputStream);
 160                                 if (log.isTraceEnabled())
 161                                         log.trace("Registered image " + image);
 162                         } catch (Exception e) {
 163                                 throw new CmsException("Cannot load image " + image, e);
 164                         } finally {
 165                                 IOUtils.closeQuietly(inputStream);
 166                         }
 167                 }
 168         }
 169
 170         private ImageData loadImage() {
 171                 URL url = getImageUrl();
 172                 ImageData result = null;
 173                 InputStream inputStream = null;
 174                 try {
 175                         inputStream = url.openStream();
 176                         result = new ImageData(inputStream);
 177                         if (log.isTraceEnabled())
 178                                 log.trace("Loaded image " + image);
 179                 } catch (Exception e) {
 180                         throw new CmsException("Cannot load image " + image, e);
 181                 } finally {
 182                         IOUtils.closeQuietly(inputStream);
 183                 }
 184                 return result;
 185         }
 186
 187         private URL getImageUrl() {
 188                 URL url;
 189                 try {
 190                         // pure URL
 191                         url = new URL(image);
 192                 } catch (MalformedURLException e1) {
 193                         // in OSGi bundle
 194                         if (bundleContext == null)
 195                                 throw new CmsException("No bundle context available");
 196                         url = bundleContext.getBundle().getResource(image);
 197                 }
 198
 199                 if (url == null)
 200                         throw new CmsException("No image " + image + " available.");
 201
 202                 return url;
 203         }
 204
 205         public void setLabel(String label) {
 206                 this.label = label;
 207         }
 208
 209         public void setCustom(String custom) {
 210                 this.custom = custom;
 211         }
 212
 213         public void setTarget(String target) {
 214                 this.target = target;
 215                 // try {
 216                 // new URL(target);
 217                 // isUrl = true;
 218                 // } catch (MalformedURLException e1) {
 219                 // isUrl = false;
 220                 // }
 221         }
 222
 223         public void setImage(String image) {
 224                 this.image = image;
 225         }
 226
 227         @Override
 228         public void setBundleContext(BundleContext bundleContext) {
 229                 this.bundleContext = bundleContext;
 230         }
 231
 232         public void setMouseListener(MouseListener mouseListener) {
 233                 this.mouseListener = mouseListener;
 234         }
 235
 236         public void setvAlign(String vAlign) {
 237                 if ("bottom".equals(vAlign)) {
 238                         verticalAlignment = SWT.BOTTOM;
 239                 } else if ("top".equals(vAlign)) {
 240                         verticalAlignment = SWT.TOP;
 241                 } else if ("center".equals(vAlign)) {
 242                         verticalAlignment = SWT.CENTER;
 243                 } else {
 244                         throw new CmsException("Unsupported vertical allignment " + vAlign
 245                                         + " (must be: top, bottom or center)");
 246                 }
 247         }
 248
 249         // private class MListener extends MouseAdapter {
 250         // private static final long serialVersionUID = 3634864186295639792L;
 251         //
 252         // @Override
 253         // public void mouseDown(MouseEvent e) {
 254         // if (e.button == 1) {
 255         // }
 256         // }
 257         // }
 258         //
 259         // private class DListener implements DisposeListener {
 260         // private static final long serialVersionUID = -3808587499269394812L;
 261         // private final Image img;
 262         //
 263         // public DListener(Image img) {
 264         // super();
 265         // this.img = img;
 266         // }
 267         //
 268         // @Override
 269         // public void widgetDisposed(DisposeEvent event) {
 270         // img.dispose();
 271         // }
 272         //
 273         // }
 274 }