autocomplete for build.properties

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/build/BuildSourceViewerConfiguration.java

@@ -17,12 +17,16 @@
 import org.eclipse.jdt.ui.PreferenceConstants;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.text.*;
+import org.eclipse.jface.text.contentassist.ContentAssistant;
+import org.eclipse.jface.text.contentassist.IContentAssistant;
 import org.eclipse.jface.text.presentation.IPresentationReconciler;
 import org.eclipse.jface.text.presentation.PresentationReconciler;
 import org.eclipse.jface.text.rules.*;
 import org.eclipse.jface.text.source.ISourceViewer;
 import org.eclipse.jface.util.PropertyChangeEvent;
+import org.eclipse.pde.internal.ui.PDEPluginImages;
 import org.eclipse.pde.internal.ui.editor.PDESourcePage;
+import org.eclipse.pde.internal.ui.editor.contentassist.BuildPropertiesContentAssistProcessor;
 import org.eclipse.pde.internal.ui.editor.text.*;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Color;
@@ -38,6 +42,9 @@ public class BuildSourceViewerConfiguration extends ChangeAwareSourceViewerConfi
 	private BasePDEScanner fCommentScanner;
 	private BasePDEScanner fPropertyValueScanner;
 
+	private ContentAssistant fContentAssistant;
+	private BuildPropertiesContentAssistProcessor fContentAssistantProcessor;
+
 	private abstract class AbstractJavaScanner extends BasePDEScanner {
 
 		@Override
@@ -231,4 +238,28 @@ public boolean affectsColorPresentation(PropertyChangeEvent event) {
 		String property = event.getProperty();
 		return property.equals(PreferenceConstants.PROPERTIES_FILE_COLORING_VALUE) || property.equals(PreferenceConstants.PROPERTIES_FILE_COLORING_ARGUMENT) || property.equals(PreferenceConstants.PROPERTIES_FILE_COLORING_ASSIGNMENT) || property.equals(PreferenceConstants.PROPERTIES_FILE_COLORING_KEY) || property.equals(PreferenceConstants.PROPERTIES_FILE_COLORING_COMMENT);
 	}
+
+	@Override
+	public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) {
+		if (fSourcePage != null && fSourcePage.isEditable()) {
+			if (fContentAssistant == null) {
+				// Initialize in SWT thread before using in background thread:
+				PDEPluginImages.get(null);
+				fContentAssistant = new ContentAssistant(true);
+				fContentAssistant.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));
+				fContentAssistantProcessor = new BuildPropertiesContentAssistProcessor(fSourcePage);
+				fContentAssistant.setContentAssistProcessor(fContentAssistantProcessor, IDocument.DEFAULT_CONTENT_TYPE);
+				fContentAssistant.setContentAssistProcessor(fContentAssistantProcessor, PROPERTY_VALUE);
+				fContentAssistant.addCompletionListener(fContentAssistantProcessor);
+				fContentAssistant.enableAutoInsert(true);
+				fContentAssistant.setInformationControlCreator(parent -> new DefaultInformationControl(parent, false));
+				fContentAssistant.setContextInformationPopupOrientation(IContentAssistant.CONTEXT_INFO_ABOVE);
+				fContentAssistant.enableAutoActivation(true);
+			}
+			return fContentAssistant;
+		}
+		return null;
+	}
+
 }
+

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/contentassist/BuildPropertiesContentAssistProcessor.java

@@ -0,0 +1,76 @@
+/*******************************************************************************
+ * Copyright (c) 2023 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.pde.internal.ui.editor.contentassist;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import org.eclipse.jface.text.*;
+import org.eclipse.jface.text.contentassist.*;
+import org.eclipse.pde.internal.build.IBuildPropertiesConstants;
+import org.eclipse.pde.internal.ui.editor.PDESourcePage;
+
+public class BuildPropertiesContentAssistProcessor extends TypePackageCompletionProcessor
+		implements ICompletionListener {
+
+	protected PDESourcePage fSourcePage;
+	public BuildPropertiesContentAssistProcessor(PDESourcePage sourcePage) {
+		fSourcePage = sourcePage;
+	}
+
+	@Override
+	public void assistSessionStarted(ContentAssistEvent event) {
+		// TODO Auto-generated method stub
+
+	}
+
+	@Override
+	public void assistSessionEnded(ContentAssistEvent event) {
+		// TODO Auto-generated method stub
+
+	}
+
+	@Override
+	public void selectionChanged(ICompletionProposal proposal, boolean smartToggle) {
+		// TODO Auto-generated method stub
+
+	}
+
+	@Override
+	public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int offset) {
+		IDocument doc = fSourcePage.getDocumentProvider().getDocument(fSourcePage.getInputContext().getInput());
+		try {
+			int lineNum = doc.getLineOfOffset(offset);
+			int lineStart = doc.getLineOffset(lineNum);
+			String value = doc.get(lineStart, offset - lineStart);
+			ArrayList<TypeCompletionProposal> completions = new ArrayList<>();
+			Field[] properties = IBuildPropertiesConstants.class.getFields();
+			for (Field f : properties) {
+				String key = f.getName();
+				String element = "";
+				try {
+					element = (String) f.get(key);
+				} catch (IllegalAccessException e) {
+					continue;
+				}
+				if (element.regionMatches(true, 0, value, 0, value.length())) {
+					TypeCompletionProposal proposal = new TypeCompletionProposal(element, null, element, lineStart,
+							value.length());
+					completions.add(proposal);
+				}
+			}
+			return completions.toArray(new ICompletionProposal[completions.size()]);
+		} catch (BadLocationException e) {
+		}
+		return null;
+	}
+}