org.argeo.cms.ui/src/org/argeo/cms/util/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 import javax.jcr.RepositoryException;
   9
  10 import org.apache.commons.io.IOUtils;
  11 import org.apache.commons.logging.Log;
  12 import org.apache.commons.logging.LogFactory;
  13 import org.argeo.cms.CmsException;
  14 import org.argeo.cms.auth.CurrentUser;
  15 import org.argeo.cms.ui.CmsStyles;
  16 import org.argeo.cms.ui.CmsUiProvider;
  17 import org.argeo.node.NodeUtils;
  18 import org.eclipse.rap.rwt.RWT;
  19 import org.eclipse.rap.rwt.service.ResourceManager;
  20 import org.eclipse.swt.SWT;
  21 import org.eclipse.swt.events.MouseListener;
  22 import org.eclipse.swt.graphics.ImageData;
  23 import org.eclipse.swt.layout.GridData;
  24 import org.eclipse.swt.widgets.Composite;
  25 import org.eclipse.swt.widgets.Control;
  26 import org.eclipse.swt.widgets.Label;
  27 import org.osgi.framework.BundleContext;
  28
  29 /** A link to an internal or external location. */
  30 public class CmsLink implements CmsUiProvider {
  31         private final static Log log = LogFactory.getLog(CmsLink.class);
  32         private BundleContext bundleContext;
  33
  34         private String label;
  35         private String custom;
  36         private String target;
  37         private String image;
  38         private MouseListener mouseListener;
  39
  40         private int verticalAlignment = SWT.CENTER;
  41
  42         private String loggedInLabel = null;
  43         private String loggedInTarget = null;
  44
  45         // internal
  46         // private Boolean isUrl = false;
  47         private Integer imageWidth, imageHeight;
  48
  49         public CmsLink() {
  50                 super();
  51         }
  52
  53         public CmsLink(String label, String target) {
  54                 this(label, target, null);
  55         }
  56
  57         public CmsLink(String label, String target, String custom) {
  58                 super();
  59                 this.label = label;
  60                 this.target = target;
  61                 this.custom = custom;
  62                 init();
  63         }
  64
  65         public void init() {
  66                 if (image != null) {
  67                         ImageData image = loadImage();
  68                         imageWidth = image.width;
  69                         imageHeight = image.height;
  70                 }
  71         }
  72
  73         /** @return {@link Composite} with a single {@link Label} child. */
  74         @Override
  75         public Control createUi(final Composite parent, Node context) {
  76                 if (image != null && (imageWidth == null || imageHeight == null)) {
  77                         throw new CmsException("Image is not properly configured."
  78                                         + " Make sure bundleContext property is set and init() method has been called.");
  79                 }
  80
  81                 Composite comp = new Composite(parent, SWT.BOTTOM);
  82                 comp.setLayout(CmsUtils.noSpaceGridLayout());
  83
  84                 Label link = new Label(comp, SWT.NONE);
  85                 link.setData(RWT.MARKUP_ENABLED, Boolean.TRUE);
  86                 GridData layoutData = new GridData(SWT.CENTER, verticalAlignment, true, true);
  87                 if (image != null) {
  88                         layoutData.heightHint = imageHeight;
  89                         if (label == null)
  90                                 layoutData.widthHint = imageWidth;
  91                 }
  92
  93                 link.setLayoutData(layoutData);
  94                 if (custom != null) {
  95                         comp.setData(RWT.CUSTOM_VARIANT, custom);
  96                         link.setData(RWT.CUSTOM_VARIANT, custom);
  97                 } else {
  98                         comp.setData(RWT.CUSTOM_VARIANT, CmsStyles.CMS_LINK);
  99                         link.setData(RWT.CUSTOM_VARIANT, CmsStyles.CMS_LINK);
 100                 }
 101
 102                 // label
 103                 StringBuilder labelText = new StringBuilder();
 104                 if (loggedInTarget != null && isLoggedIn()) {
 105                         labelText.append("<a style='color:inherit;text-decoration:inherit;' href=\"");
 106                         if (loggedInTarget.equals("")) {
 107                                 try {
 108                                         Node homeNode = NodeUtils.getUserHome(context.getSession());
 109                                         String homePath = homeNode.getPath();
 110                                         labelText.append("/#" + homePath);
 111                                 } catch (RepositoryException e) {
 112                                         throw new CmsException("Cannot get home path", e);
 113                                 }
 114                         } else {
 115                                 labelText.append(loggedInTarget);
 116                         }
 117                         labelText.append("\">");
 118                 } else if (target != null) {
 119                         labelText.append("<a style='color:inherit;text-decoration:inherit;' href=\"");
 120                         labelText.append(target);
 121                         labelText.append("\">");
 122                 }
 123                 if (image != null) {
 124                         registerImageIfNeeded();
 125                         String imageLocation = RWT.getResourceManager().getLocation(image);
 126                         labelText.append("<img width='").append(imageWidth).append("' height='").append(imageHeight)
 127                                         .append("' src=\"").append(imageLocation).append("\"/>");
 128
 129                 }
 130
 131                 if (loggedInLabel != null && isLoggedIn()) {
 132                         labelText.append(' ').append(loggedInLabel);
 133                 } else if (label != null) {
 134                         labelText.append(' ').append(label);
 135                 }
 136
 137                 if ((loggedInTarget != null && isLoggedIn()) || target != null)
 138                         labelText.append("</a>");
 139
 140                 link.setText(labelText.toString());
 141
 142                 if (mouseListener != null)
 143                         link.addMouseListener(mouseListener);
 144
 145                 return comp;
 146         }
 147
 148         private void registerImageIfNeeded() {
 149                 ResourceManager resourceManager = RWT.getResourceManager();
 150                 if (!resourceManager.isRegistered(image)) {
 151                         URL res = getImageUrl();
 152                         InputStream inputStream = null;
 153                         try {
 154                                 IOUtils.closeQuietly(inputStream);
 155                                 inputStream = res.openStream();
 156                                 resourceManager.register(image, inputStream);
 157                                 if (log.isTraceEnabled())
 158                                         log.trace("Registered image " + image);
 159                         } catch (Exception e) {
 160                                 throw new CmsException("Cannot load image " + image, e);
 161                         } finally {
 162                                 IOUtils.closeQuietly(inputStream);
 163                         }
 164                 }
 165         }
 166
 167         private ImageData loadImage() {
 168                 URL url = getImageUrl();
 169                 ImageData result = null;
 170                 InputStream inputStream = null;
 171                 try {
 172                         inputStream = url.openStream();
 173                         result = new ImageData(inputStream);
 174                         if (log.isTraceEnabled())
 175                                 log.trace("Loaded image " + image);
 176                 } catch (Exception e) {
 177                         throw new CmsException("Cannot load image " + image, e);
 178                 } finally {
 179                         IOUtils.closeQuietly(inputStream);
 180                 }
 181                 return result;
 182         }
 183
 184         private URL getImageUrl() {
 185                 URL url;
 186                 try {
 187                         // pure URL
 188                         url = new URL(image);
 189                 } catch (MalformedURLException e1) {
 190                         url = bundleContext.getBundle().getResource(image);
 191                 }
 192
 193                 if (url == null)
 194                         throw new CmsException("No image " + image + " available.");
 195
 196                 return url;
 197         }
 198
 199         public void setBundleContext(BundleContext bundleContext) {
 200                 this.bundleContext = bundleContext;
 201         }
 202
 203         public void setLabel(String label) {
 204                 this.label = label;
 205         }
 206
 207         public void setCustom(String custom) {
 208                 this.custom = custom;
 209         }
 210
 211         public void setTarget(String target) {
 212                 this.target = target;
 213                 // try {
 214                 // new URL(target);
 215                 // isUrl = true;
 216                 // } catch (MalformedURLException e1) {
 217                 // isUrl = false;
 218                 // }
 219         }
 220
 221         public void setImage(String image) {
 222                 this.image = image;
 223         }
 224
 225         public void setLoggedInLabel(String loggedInLabel) {
 226                 this.loggedInLabel = loggedInLabel;
 227         }
 228
 229         public void setLoggedInTarget(String loggedInTarget) {
 230                 this.loggedInTarget = loggedInTarget;
 231         }
 232
 233         public void setMouseListener(MouseListener mouseListener) {
 234                 this.mouseListener = mouseListener;
 235         }
 236
 237         public void setvAlign(String vAlign) {
 238                 if ("bottom".equals(vAlign)) {
 239                         verticalAlignment = SWT.BOTTOM;
 240                 } else if ("top".equals(vAlign)) {
 241                         verticalAlignment = SWT.TOP;
 242                 } else if ("center".equals(vAlign)) {
 243                         verticalAlignment = SWT.CENTER;
 244                 } else {
 245                         throw new CmsException("Unsupported vertical allignment " + vAlign + " (must be: top, bottom or center)");
 246                 }
 247         }
 248
 249         protected boolean isLoggedIn() {
 250                 return !CurrentUser.isAnonymous();
 251         }
 252
 253 }