CmsLink.java

   1 package org.argeo.cms.ui.util;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.net.MalformedURLException;
   6 import java.net.URL;
   7
   8 import javax.jcr.Node;
   9 import javax.jcr.RepositoryException;
  10
  11 import org.apache.commons.logging.Log;
  12 import org.apache.commons.logging.LogFactory;
  13 import org.argeo.cms.auth.CurrentUser;
  14 import org.argeo.cms.jcr.CmsJcrUtils;
  15 import org.argeo.cms.ui.CmsUiProvider;
  16 import org.argeo.jcr.JcrException;
  17 import org.eclipse.rap.rwt.RWT;
  18 import org.eclipse.rap.rwt.service.ResourceManager;
  19 import org.eclipse.swt.SWT;
  20 import org.eclipse.swt.events.MouseListener;
  21 import org.eclipse.swt.graphics.ImageData;
  22 import org.eclipse.swt.layout.GridData;
  23 import org.eclipse.swt.widgets.Composite;
  24 import org.eclipse.swt.widgets.Control;
  25 import org.eclipse.swt.widgets.Label;
  26 import org.osgi.framework.BundleContext;
  27
  28 /** A link to an internal or external location. */
  29 public class CmsLink implements CmsUiProvider {
  30         private final static Log log = LogFactory.getLog(CmsLink.class);
  31         private BundleContext bundleContext;
  32
  33         private String label;
  34         private String style;
  35         private String target;
  36         private String image;
  37         private boolean openNew = false;
  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, (String) null);
  56         }
  57
  58         public CmsLink(String label, String target, CmsStyle style) {
  59                 this(label, target, style != null ? style.style() : null);
  60         }
  61
  62         public CmsLink(String label, String target, String style) {
  63                 super();
  64                 this.label = label;
  65                 this.target = target;
  66                 this.style = style;
  67                 init();
  68         }
  69
  70         public void init() {
  71                 if (image != null) {
  72                         ImageData image = loadImage();
  73                         if (imageHeight == null && imageWidth == null) {
  74                                 imageWidth = image.width;
  75                                 imageHeight = image.height;
  76                         } else if (imageHeight == null) {
  77                                 imageHeight = (imageWidth * image.height) / image.width;
  78                         } else if (imageWidth == null) {
  79                                 imageWidth = (imageHeight * image.width) / image.height;
  80                         }
  81                 }
  82         }
  83
  84         /** @return {@link Composite} with a single {@link Label} child. */
  85         @Override
  86         public Control createUi(final Composite parent, Node context) {
  87 //              if (image != null && (imageWidth == null || imageHeight == null)) {
  88 //                      throw new CmsException("Image is not properly configured."
  89 //                                      + " Make sure bundleContext property is set and init() method has been called.");
  90 //              }
  91
  92                 Composite comp = new Composite(parent, SWT.NONE);
  93                 comp.setLayout(CmsUiUtils.noSpaceGridLayout());
  94
  95                 Label link = new Label(comp, SWT.NONE);
  96                 CmsUiUtils.markup(link);
  97                 GridData layoutData = new GridData(horizontalAlignment, verticalAlignment, false, false);
  98                 if (image != null) {
  99                         if (imageHeight != null)
 100                                 layoutData.heightHint = imageHeight;
 101                         if (label == null)
 102                                 if (imageWidth != null)
 103                                         layoutData.widthHint = imageWidth;
 104                 }
 105
 106                 link.setLayoutData(layoutData);
 107                 CmsUiUtils.style(comp, style != null ? style : getDefaultStyle());
 108                 CmsUiUtils.style(link, style != null ? style : getDefaultStyle());
 109
 110                 // label
 111                 StringBuilder labelText = new StringBuilder();
 112                 if (loggedInTarget != null && isLoggedIn()) {
 113                         labelText.append("<a style='color:inherit;text-decoration:inherit;' href=\"");
 114                         if (loggedInTarget.equals("")) {
 115                                 try {
 116                                         Node homeNode = CmsJcrUtils.getUserHome(context.getSession());
 117                                         String homePath = homeNode.getPath();
 118                                         labelText.append("/#" + homePath);
 119                                 } catch (RepositoryException e) {
 120                                         throw new JcrException("Cannot get home path", e);
 121                                 }
 122                         } else {
 123                                 labelText.append(loggedInTarget);
 124                         }
 125                         labelText.append("\">");
 126                 } else if (target != null) {
 127                         labelText.append("<a style='color:inherit;text-decoration:inherit;' href='");
 128                         labelText.append(target).append("'");
 129                         if (openNew) {
 130                                 labelText.append(" target='_blank'");
 131                         }
 132                         labelText.append(">");
 133                 }
 134                 if (image != null) {
 135                         registerImageIfNeeded();
 136                         String imageLocation = RWT.getResourceManager().getLocation(image);
 137                         labelText.append("<img");
 138                         if (imageWidth != null)
 139                                 labelText.append(" width='").append(imageWidth).append('\'');
 140                         if (imageHeight != null)
 141                                 labelText.append(" height='").append(imageHeight).append('\'');
 142                         labelText.append(" src=\"").append(imageLocation).append("\"/>");
 143
 144                 }
 145
 146                 if (loggedInLabel != null && isLoggedIn()) {
 147                         labelText.append(' ').append(loggedInLabel);
 148                 } else if (label != null) {
 149                         labelText.append(' ').append(label);
 150                 }
 151
 152                 if ((loggedInTarget != null && isLoggedIn()) || target != null)
 153                         labelText.append("</a>");
 154
 155                 link.setText(labelText.toString());
 156
 157                 if (mouseListener != null)
 158                         link.addMouseListener(mouseListener);
 159
 160                 return comp;
 161         }
 162
 163         private void registerImageIfNeeded() {
 164                 ResourceManager resourceManager = RWT.getResourceManager();
 165                 if (!resourceManager.isRegistered(image)) {
 166                         URL res = getImageUrl();
 167                         try (InputStream inputStream = res.openStream()) {
 168                                 resourceManager.register(image, inputStream);
 169                                 if (log.isTraceEnabled())
 170                                         log.trace("Registered image " + image);
 171                         } catch (IOException e) {
 172                                 throw new RuntimeException("Cannot load image " + image, e);
 173                         }
 174                 }
 175         }
 176
 177         private ImageData loadImage() {
 178                 URL url = getImageUrl();
 179                 ImageData result = null;
 180                 try (InputStream inputStream = url.openStream()) {
 181                         result = new ImageData(inputStream);
 182                         if (log.isTraceEnabled())
 183                                 log.trace("Loaded image " + image);
 184                 } catch (IOException e) {
 185                         throw new RuntimeException("Cannot load image " + image, e);
 186                 }
 187                 return result;
 188         }
 189
 190         private URL getImageUrl() {
 191                 URL url;
 192                 try {
 193                         // pure URL
 194                         url = new URL(image);
 195                 } catch (MalformedURLException e1) {
 196                         url = bundleContext.getBundle().getResource(image);
 197                 }
 198
 199                 if (url == null)
 200                         throw new IllegalStateException("No image " + image + " available.");
 201
 202                 return url;
 203         }
 204
 205         public void setBundleContext(BundleContext bundleContext) {
 206                 this.bundleContext = bundleContext;
 207         }
 208
 209         public void setLabel(String label) {
 210                 this.label = label;
 211         }
 212
 213         public void setStyle(String style) {
 214                 this.style = style;
 215         }
 216
 217         /** @deprecated Use {@link #setStyle(String)} instead. */
 218         @Deprecated
 219         public void setCustom(String custom) {
 220                 this.style = custom;
 221         }
 222
 223         public void setTarget(String target) {
 224                 this.target = target;
 225                 // try {
 226                 // new URL(target);
 227                 // isUrl = true;
 228                 // } catch (MalformedURLException e1) {
 229                 // isUrl = false;
 230                 // }
 231         }
 232
 233         public void setImage(String image) {
 234                 this.image = image;
 235         }
 236
 237         public void setLoggedInLabel(String loggedInLabel) {
 238                 this.loggedInLabel = loggedInLabel;
 239         }
 240
 241         public void setLoggedInTarget(String loggedInTarget) {
 242                 this.loggedInTarget = loggedInTarget;
 243         }
 244
 245         public void setMouseListener(MouseListener mouseListener) {
 246                 this.mouseListener = mouseListener;
 247         }
 248
 249         public void setvAlign(String vAlign) {
 250                 if ("bottom".equals(vAlign)) {
 251                         verticalAlignment = SWT.BOTTOM;
 252                 } else if ("top".equals(vAlign)) {
 253                         verticalAlignment = SWT.TOP;
 254                 } else if ("center".equals(vAlign)) {
 255                         verticalAlignment = SWT.CENTER;
 256                 } else {
 257                         throw new IllegalArgumentException(
 258                                         "Unsupported vertical alignment " + 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         public void setOpenNew(boolean openNew) {
 275                 this.openNew = openNew;
 276         }
 277
 278         protected String getDefaultStyle() {
 279                 return SimpleStyle.link.name();
 280         }
 281 }