1 files changed, 148 insertions, 0 deletions
diff --git a/org.eclipse.m2e.editor.xml/src/main/java/org/eclipse/m2e/editor/xml/PomTextHover.java b/org.eclipse.m2e.editor.xml/src/main/java/org/eclipse/m2e/editor/xml/PomTextHover.java
new file mode 100644
index 00000000..c0322877
--- /dev/null
+++ b/org.eclipse.m2e.editor.xml/src/main/java/org/eclipse/m2e/editor/xml/PomTextHover.java
@@ -0,0 +1,148 @@
+package org.eclipse.m2e.editor.xml;
+
+import java.util.List;
+
+import org.apache.maven.model.Dependency;
+import org.apache.maven.model.DependencyManagement;
+import org.apache.maven.model.InputLocation;
+import org.apache.maven.model.InputSource;
+import org.apache.maven.model.Model;
+import org.apache.maven.model.Plugin;
+import org.apache.maven.model.PluginManagement;
+import org.apache.maven.project.MavenProject;
+import org.w3c.dom.Node;
+
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextHover;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.source.ISourceViewer;
+import org.eclipse.osgi.util.NLS;
+
+import org.eclipse.m2e.core.MavenPlugin;
+import org.eclipse.m2e.core.project.IMavenProjectFacade;
+import org.eclipse.m2e.editor.xml.PomHyperlinkDetector.ExpressionRegion;
+import org.eclipse.m2e.editor.xml.PomHyperlinkDetector.ManagedArtifactRegion;
+import org.eclipse.m2e.editor.xml.internal.Messages;
+
+public class PomTextHover implements ITextHover {
+
+  public PomTextHover(ISourceViewer sourceViewer, String contentType, int stateMask) {
+  }
+  
+  public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
+    if (hoverRegion instanceof ExpressionRegion) {
+      ExpressionRegion region = (ExpressionRegion) hoverRegion;
+      IMavenProjectFacade mvnproject = MavenPlugin.getDefault().getMavenProjectManager().getProject(region.project);
+      if (mvnproject != null) {
+        MavenProject mavprj = mvnproject.getMavenProject();
+        if (mavprj != null) {
+          String value = PomTemplateContext.simpleInterpolate(region.project, "${" + region.property + "}"); //$NON-NLS-1$ //$NON-NLS-2$
+          String loc = null;
+          Model mdl = mavprj.getModel();
+          if (mdl.getProperties() != null && mdl.getProperties().containsKey(region.property)) {
+            if (mdl.getLocation("properties") != null) {
+              InputLocation location = mdl.getLocation("properties").getLocation(region.property); //$NON-NLS-1$
+              if (location != null) {
+                //MNGECLIPSE-2539 apparently you can have an InputLocation with null input source.
+                // check!
+                InputSource source = location.getSource();
+                if (source != null) {
+                  loc = source.getModelId();
+                }
+              }
+            }
+          }
+          String ret = NLS.bind(Messages.PomTextHover_eval1, 
+              value, loc != null ? NLS.bind(Messages.PomTextHover_eval2, loc) : ""); //$NON-NLS-2$ //$NON-NLS-1$
+          return ret;
+        }
+      }
+    } else if (hoverRegion instanceof ManagedArtifactRegion) {
+      ManagedArtifactRegion region = (ManagedArtifactRegion) hoverRegion;
+      IMavenProjectFacade mvnproject = MavenPlugin.getDefault().getMavenProjectManager().getProject(region.project);
+      if (mvnproject != null) {
+        MavenProject mavprj = mvnproject.getMavenProject();
+        if (mavprj != null) {
+          String version = null;
+          if (region.isDependency) {
+            DependencyManagement dm = mavprj.getDependencyManagement();
+            if (dm != null) {
+              List<Dependency> list = dm.getDependencies();
+              String id = region.groupId + ":" + region.artifactId + ":"; //$NON-NLS-1$ //$NON-NLS-2$
+              if (list != null) {
+                for (Dependency dep : list) {
+                  if (dep.getManagementKey().startsWith(id)) {
+                    version = dep.getVersion();
+                  }
+                }
+              }
+            }
+          }
+          
+          if (region.isPlugin) {
+            PluginManagement pm = mavprj.getPluginManagement();
+            if (pm != null) {
+              List<Plugin> list = pm.getPlugins();
+              String id = Plugin.constructKey(region.groupId, region.artifactId);
+              if (list != null) {
+                for (Plugin plg : list) {
+                  if (id.equals(plg.getKey())) {
+                    version = plg.getVersion();
+                  }
+                }
+              }
+              
+            }
+          }
+          StringBuffer ret = new StringBuffer();
+          ret.append("<html>"); //$NON-NLS-1$
+          if (version != null) {
+            ret.append(NLS.bind(Messages.PomTextHover_managed_version, version));
+          } else {
+            ret.append(Messages.PomTextHover_managed_version_missing);
+          }
+          ret.append("<br>"); //$NON-NLS-1$
+          InputLocation openLocation = PomHyperlinkDetector.findLocationForManagedArtifact(region, mavprj);
+          if (openLocation != null) {
+            //MNGECLIPSE-2539 apparently you can have an InputLocation with null input source.
+            // check!
+            InputSource source = openLocation.getSource();
+            if (source != null) {
+              ret.append(NLS.bind(Messages.PomTextHover_managed_location, source.getModelId()));
+            }
+          } else {
+            ret.append(Messages.PomTextHover_managed_location_missing);
+          }
+          ret.append("</html>"); //$NON-NLS-1$
+          return ret.toString();
+        }
+      }
+    }
+    
+    return null;
+  }
+
+  public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
+    IDocument document = textViewer.getDocument();
+    if(document == null) {
+      return null;
+    }
+
+    Node current = PomHyperlinkDetector.getCurrentNode(document, offset);
+    if (current != null) {
+      ExpressionRegion region = PomHyperlinkDetector.findExpressionRegion(current, textViewer, offset);
+      if (region != null) {
+        return region;
+      }
+      ManagedArtifactRegion manReg = PomHyperlinkDetector.findManagedArtifactRegion(current, textViewer, offset);
+      if (manReg != null) {
+        return manReg;
+      }
+    }
+    return null;
+  }
+  
+
+
+}