refactory: added UI removed from core plugin.

[phpeclipse.git] / net.sourceforge.phpeclipse.ui / src / net / sourceforge / phpdt / internal / ui / text / JavaElementProvider.java

diff --git a/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/JavaElementProvider.java b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/JavaElementProvider.java
new file mode 100644 (file)
index 0000000..db4ef87
--- /dev/null
+++ b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/JavaElementProvider.java
@@ -0,0 +1,92 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.ui.text;
+
+import net.sourceforge.phpdt.core.IJavaElement;
+import net.sourceforge.phpdt.core.JavaModelException;
+import net.sourceforge.phpdt.internal.ui.actions.SelectionConverter;
+import net.sourceforge.phpeclipse.phpeditor.PHPEditor;
+
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.Region;
+import org.eclipse.jface.text.information.IInformationProvider;
+import org.eclipse.jface.text.information.IInformationProviderExtension;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.ui.IEditorPart;
+
+/**
+ * Provides a Java element to be displayed in by an information presenter.
+ */
+public class JavaElementProvider implements IInformationProvider,
+               IInformationProviderExtension {
+
+       private PHPEditor fEditor;
+
+       private boolean fUseCodeResolve;
+
+       public JavaElementProvider(IEditorPart editor) {
+               fUseCodeResolve = false;
+               if (editor instanceof PHPEditor)
+                       fEditor = (PHPEditor) editor;
+       }
+
+       public JavaElementProvider(IEditorPart editor, boolean useCodeResolve) {
+               this(editor);
+               fUseCodeResolve = useCodeResolve;
+       }
+
+       /*
+        * @see IInformationProvider#getSubject(ITextViewer, int)
+        */
+       public IRegion getSubject(ITextViewer textViewer, int offset) {
+               if (textViewer != null && fEditor != null) {
+                       IRegion region = JavaWordFinder.findWord(textViewer.getDocument(),
+                                       offset);
+                       if (region != null)
+                               return region;
+                       else
+                               return new Region(offset, 0);
+               }
+               return null;
+       }
+
+       /*
+        * @see IInformationProvider#getInformation(ITextViewer, IRegion)
+        */
+       public String getInformation(ITextViewer textViewer, IRegion subject) {
+               return getInformation2(textViewer, subject).toString();
+       }
+
+       /*
+        * @see IInformationProviderExtension#getElement(ITextViewer, IRegion)
+        */
+       public Object getInformation2(ITextViewer textViewer, IRegion subject) {
+               if (fEditor == null)
+                       return null;
+
+               try {
+                       if (fUseCodeResolve) {
+                               IStructuredSelection sel = SelectionConverter
+                                               .getStructuredSelection(fEditor);
+                               if (!sel.isEmpty())
+                                       return sel.getFirstElement();
+                       }
+                       IJavaElement element = SelectionConverter
+                                       .getElementAtOffset(fEditor);
+                       if (element != null)
+                               return element;
+                       return SelectionConverter.getInput(fEditor);
+               } catch (JavaModelException e) {
+                       return null;
+               }
+       }
+}