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.argeo.api.cms.CmsLog;
  12 import org.argeo.api.cms.ux.CmsStyle;
  13 import org.argeo.cms.auth.CurrentUser;
  14 import org.argeo.cms.jcr.CmsJcrUtils;
  15 import org.argeo.cms.swt.CmsSwtUtils;
  16 import org.argeo.cms.ui.CmsUiProvider;
  17 import org.argeo.jcr.JcrException;
  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 CmsLog log = CmsLog.getLog(CmsLink.class);
  32         private BundleContext bundleContext;
  33
  34         private String label;
  35         private String style;
  36         private String target;
  37         private String image;
  38         private boolean openNew = false;
  39         private MouseListener mouseListener;
  40
  41         private int horizontalAlignment = SWT.CENTER;
  42         private int verticalAlignment = SWT.CENTER;
  43
  44         private String loggedInLabel = null;
  45         private String loggedInTarget = null;
  46
  47         // internal
  48         // private Boolean isUrl = false;
  49         private Integer imageWidth, imageHeight;
  50
  51         public CmsLink() {
  52                 super();
  53         }
  54
  55         public CmsLink(String label, String target) {
  56                 this(label, target, (String) null);
  57         }
  58
  59         public CmsLink(String label, String target, CmsStyle style) {
  60                 this(label, target, style != null ? style.style() : null);
  61         }
  62
  63         public CmsLink(String label, String target, String style) {
  64                 super();
  65                 this.label = label;
  66                 this.target = target;
  67                 this.style = style;
  68                 init();
  69         }
  70
  71         public void init() {
  72                 if (image != null) {
  73                         ImageData image = loadImage();
  74                         if (imageHeight == null && imageWidth == null) {
  75                                 imageWidth = image.width;
  76                                 imageHeight = image.height;
  77                         } else if (imageHeight == null) {
  78                                 imageHeight = (imageWidth * image.height) / image.width;
  79                         } else if (imageWidth == null) {
  80                                 imageWidth = (imageHeight * image.width) / image.height;
  81                         }
  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 //              if (image != null && (imageWidth == null || imageHeight == null)) {
  89 //                      throw new CmsException("Image is not properly configured."
  90 //                                      + " Make sure bundleContext property is set and init() method has been called.");
  91 //              }
  92
  93                 Composite comp = new Composite(parent, SWT.NONE);
  94                 comp.setLayout(CmsSwtUtils.noSpaceGridLayout());
  95
  96                 Label link = new Label(comp, SWT.NONE);
  97                 CmsSwtUtils.markup(link);
  98                 GridData layoutData = new GridData(horizontalAlignment, verticalAlignment, false, false);
  99                 if (image != null) {
 100                         if (imageHeight != null)
 101                                 layoutData.heightHint = imageHeight;
 102                         if (label == null)
 103                                 if (imageWidth != null)
 104                                         layoutData.widthHint = imageWidth;
 105                 }
 106
 107                 link.setLayoutData(layoutData);
 108                 CmsSwtUtils.style(comp, style != null ? style : getDefaultStyle());
 109                 CmsSwtUtils.style(link, style != null ? style : getDefaultStyle());
 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 = CmsJcrUtils.getUserHome(context.getSession());
 118                                         String homePath = homeNode.getPath();
 119                                         labelText.append("/#" + homePath);
 120                                 } catch (RepositoryException e) {
 121                                         throw new JcrException("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).append("'");
 130                         if (openNew) {
 131                                 labelText.append(" target='_blank'");
 132                         }
 133                         labelText.append(">");
 134                 }
 135                 if (image != null) {
 136                         registerImageIfNeeded();
 137                         String imageLocation = RWT.getResourceManager().getLocation(image);
 138                         labelText.append("<img");
 139                         if (imageWidth != null)
 140                                 labelText.append(" width='").append(imageWidth).append('\'');
 141                         if (imageHeight != null)
 142                                 labelText.append(" height='").append(imageHeight).append('\'');
 143                         labelText.append(" src=\"").append(imageLocation).append("\"/>");
 144
 145                 }
 146
 147                 if (loggedInLabel != null && isLoggedIn()) {
 148                         labelText.append(' ').append(loggedInLabel);
 149                 } else if (label != null) {
 150                         labelText.append(' ').append(label);
 151                 }
 152
 153                 if ((loggedInTarget != null && isLoggedIn()) || target != null)
 154                         labelText.append("</a>");
 155
 156                 link.setText(labelText.toString());
 157
 158                 if (mouseListener != null)
 159                         link.addMouseListener(mouseListener);
 160
 161                 return comp;
 162         }
 163
 164         private void registerImageIfNeeded() {
 165                 ResourceManager resourceManager = RWT.getResourceManager();
 166                 if (!resourceManager.isRegistered(image)) {
 167                         URL res = getImageUrl();
 168                         try (InputStream inputStream = res.openStream()) {
 169                                 resourceManager.register(image, inputStream);
 170                                 if (log.isTraceEnabled())
 171                                         log.trace("Registered image " + image);
 172                         } catch (IOException e) {
 173                                 throw new RuntimeException("Cannot load image " + image, e);
 174                         }
 175                 }
 176         }
 177
 178         private ImageData loadImage() {
 179                 URL url = getImageUrl();
 180                 ImageData result = null;
 181                 try (InputStream inputStream = url.openStream()) {
 182                         result = new ImageData(inputStream);
 183                         if (log.isTraceEnabled())
 184                                 log.trace("Loaded image " + image);
 185                 } catch (IOException e) {
 186                         throw new RuntimeException("Cannot load image " + image, e);
 187                 }
 188                 return result;
 189         }
 190
 191         private URL getImageUrl() {
 192                 URL url;
 193                 try {
 194                         // pure URL
 195                         url = new URL(image);
 196                 } catch (MalformedURLException e1) {
 197                         url = bundleContext.getBundle().getResource(image);
 198                 }
 199
 200                 if (url == null)
 201                         throw new IllegalStateException("No image " + image + " available.");
 202
 203                 return url;
 204         }
 205
 206         public void setBundleContext(BundleContext bundleContext) {
 207                 this.bundleContext = bundleContext;
 208         }
 209
 210         public void setLabel(String label) {
 211                 this.label = label;
 212         }
 213
 214         public void setStyle(String style) {
 215                 this.style = style;
 216         }
 217
 218         /** @deprecated Use {@link #setStyle(String)} instead. */
 219         @Deprecated
 220         public void setCustom(String custom) {
 221                 this.style = 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 IllegalArgumentException(
 259                                         "Unsupported vertical alignment " + vAlign + " (must be: top, bottom or center)");
 260                 }
 261         }
 262
 263         protected boolean isLoggedIn() {
 264                 return !CurrentUser.isAnonymous();
 265         }
 266
 267         public void setImageWidth(Integer imageWidth) {
 268                 this.imageWidth = imageWidth;
 269         }
 270
 271         public void setImageHeight(Integer imageHeight) {
 272                 this.imageHeight = imageHeight;
 273         }
 274
 275         public void setOpenNew(boolean openNew) {
 276                 this.openNew = openNew;
 277         }
 278
 279         protected String getDefaultStyle() {
 280                 return SimpleStyle.link.name();
 281         }
 282 }