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 horizontalAlignment = SWT.CENTER;
  41         private int verticalAlignment = SWT.CENTER;
  42
  43         private String loggedInLabel = null;
  44         private String loggedInTarget = null;
  45
  46         // internal
  47         // private Boolean isUrl = false;
  48         private Integer imageWidth, imageHeight;
  49
  50         public CmsLink() {
  51                 super();
  52         }
  53
  54         public CmsLink(String label, String target) {
  55                 this(label, target, null);
  56         }
  57
  58         public CmsLink(String label, String target, String custom) {
  59                 super();
  60                 this.label = label;
  61                 this.target = target;
  62                 this.custom = custom;
  63                 init();
  64         }
  65
  66         public void init() {
  67                 if (image != null) {
  68                         ImageData image = loadImage();
  69                         if (imageHeight == null && imageWidth == null) {
  70                                 imageWidth = image.width;
  71                                 imageHeight = image.height;
  72                         } else if (imageHeight == null) {
  73                                 imageHeight = (imageWidth * image.height) / image.width;
  74                         } else if (imageWidth == null) {
  75                                 imageWidth = (imageHeight * image.width) / image.height;
  76                         }
  77                 }
  78         }
  79
  80         /** @return {@link Composite} with a single {@link Label} child. */
  81         @Override
  82         public Control createUi(final Composite parent, Node context) {
  83 //              if (image != null && (imageWidth == null || imageHeight == null)) {
  84 //                      throw new CmsException("Image is not properly configured."
  85 //                                      + " Make sure bundleContext property is set and init() method has been called.");
  86 //              }
  87
  88                 Composite comp = new Composite(parent, SWT.NONE);
  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(horizontalAlignment, verticalAlignment, false, false);
  94                 if (image != null) {
  95                         if (imageHeight != null)
  96                                 layoutData.heightHint = imageHeight;
  97                         if (label == null)
  98                                 if (imageWidth != null)
  99                                         layoutData.widthHint = imageWidth;
 100                 }
 101
 102                 link.setLayoutData(layoutData);
 103                 if (custom != null) {
 104                         comp.setData(RWT.CUSTOM_VARIANT, custom);
 105                         link.setData(RWT.CUSTOM_VARIANT, custom);
 106                 } else {
 107                         comp.setData(RWT.CUSTOM_VARIANT, CmsStyles.CMS_LINK);
 108                         link.setData(RWT.CUSTOM_VARIANT, CmsStyles.CMS_LINK);
 109                 }
 110
 111                 // label
 112                 StringBuilder labelText = new StringBuilder();
 113                 if (loggedInTarget != null && isLoggedIn()) {
 114                         labelText.append("<a style='color:inherit;text-decoration:inherit;' href=\"");
 115                         if (loggedInTarget.equals("")) {
 116                                 try {
 117                                         Node homeNode = NodeUtils.getUserHome(context.getSession());
 118                                         String homePath = homeNode.getPath();
 119                                         labelText.append("/#" + homePath);
 120                                 } catch (RepositoryException e) {
 121                                         throw new CmsException("Cannot get home path", e);
 122                                 }
 123                         } else {
 124                                 labelText.append(loggedInTarget);
 125                         }
 126                         labelText.append("\">");
 127                 } else if (target != null) {
 128                         labelText.append("<a style='color:inherit;text-decoration:inherit;' href=\"");
 129                         labelText.append(target);
 130                         labelText.append("\">");
 131                 }
 132                 if (image != null) {
 133                         registerImageIfNeeded();
 134                         String imageLocation = RWT.getResourceManager().getLocation(image);
 135                         labelText.append("<img");
 136                         if (imageWidth != null)
 137                                 labelText.append(" width='").append(imageWidth).append('\'');
 138                         if (imageHeight != null)
 139                                 labelText.append(" height='").append(imageHeight).append('\'');
 140                         labelText.append(" src=\"").append(imageLocation).append("\"/>");
 141
 142                 }
 143
 144                 if (loggedInLabel != null && isLoggedIn()) {
 145                         labelText.append(' ').append(loggedInLabel);
 146                 } else if (label != null) {
 147                         labelText.append(' ').append(label);
 148                 }
 149
 150                 if ((loggedInTarget != null && isLoggedIn()) || target != null)
 151                         labelText.append("</a>");
 152
 153                 link.setText(labelText.toString());
 154
 155                 if (mouseListener != null)
 156                         link.addMouseListener(mouseListener);
 157
 158                 return comp;
 159         }
 160
 161         private void registerImageIfNeeded() {
 162                 ResourceManager resourceManager = RWT.getResourceManager();
 163                 if (!resourceManager.isRegistered(image)) {
 164                         URL res = getImageUrl();
 165                         InputStream inputStream = null;
 166                         try {
 167                                 IOUtils.closeQuietly(inputStream);
 168                                 inputStream = res.openStream();
 169                                 resourceManager.register(image, inputStream);
 170                                 if (log.isTraceEnabled())
 171                                         log.trace("Registered image " + image);
 172                         } catch (Exception e) {
 173                                 throw new CmsException("Cannot load image " + image, e);
 174                         } finally {
 175                                 IOUtils.closeQuietly(inputStream);
 176                         }
 177                 }
 178         }
 179
 180         private ImageData loadImage() {
 181                 URL url = getImageUrl();
 182                 ImageData result = null;
 183                 InputStream inputStream = null;
 184                 try {
 185                         inputStream = url.openStream();
 186                         result = new ImageData(inputStream);
 187                         if (log.isTraceEnabled())
 188                                 log.trace("Loaded image " + image);
 189                 } catch (Exception e) {
 190                         throw new CmsException("Cannot load image " + image, e);
 191                 } finally {
 192                         IOUtils.closeQuietly(inputStream);
 193                 }
 194                 return result;
 195         }
 196
 197         private URL getImageUrl() {
 198                 URL url;
 199                 try {
 200                         // pure URL
 201                         url = new URL(image);
 202                 } catch (MalformedURLException e1) {
 203                         url = bundleContext.getBundle().getResource(image);
 204                 }
 205
 206                 if (url == null)
 207                         throw new CmsException("No image " + image + " available.");
 208
 209                 return url;
 210         }
 211
 212         public void setBundleContext(BundleContext bundleContext) {
 213                 this.bundleContext = bundleContext;
 214         }
 215
 216         public void setLabel(String label) {
 217                 this.label = label;
 218         }
 219
 220         public void setCustom(String custom) {
 221                 this.custom = custom;
 222         }
 223
 224         public void setTarget(String target) {
 225                 this.target = target;
 226                 // try {
 227                 // new URL(target);
 228                 // isUrl = true;
 229                 // } catch (MalformedURLException e1) {
 230                 // isUrl = false;
 231                 // }
 232         }
 233
 234         public void setImage(String image) {
 235                 this.image = image;
 236         }
 237
 238         public void setLoggedInLabel(String loggedInLabel) {
 239                 this.loggedInLabel = loggedInLabel;
 240         }
 241
 242         public void setLoggedInTarget(String loggedInTarget) {
 243                 this.loggedInTarget = loggedInTarget;
 244         }
 245
 246         public void setMouseListener(MouseListener mouseListener) {
 247                 this.mouseListener = mouseListener;
 248         }
 249
 250         public void setvAlign(String vAlign) {
 251                 if ("bottom".equals(vAlign)) {
 252                         verticalAlignment = SWT.BOTTOM;
 253                 } else if ("top".equals(vAlign)) {
 254                         verticalAlignment = SWT.TOP;
 255                 } else if ("center".equals(vAlign)) {
 256                         verticalAlignment = SWT.CENTER;
 257                 } else {
 258                         throw new CmsException("Unsupported vertical allignment " + vAlign + " (must be: top, bottom or center)");
 259                 }
 260         }
 261
 262         protected boolean isLoggedIn() {
 263                 return !CurrentUser.isAnonymous();
 264         }
 265
 266         public void setImageWidth(Integer imageWidth) {
 267                 this.imageWidth = imageWidth;
 268         }
 269
 270         public void setImageHeight(Integer imageHeight) {
 271                 this.imageHeight = imageHeight;
 272         }
 273
 274 }