Fix Tag selection in the selection page.

Change-Id: Ib8c67d1bddd6c4a963ccc0f89b46218ecc18173b

bundles/org.eclipse.tools.templates.ui/src/org/eclipse/tools/templates/ui/TemplateSelectionPage.java

@@ -8,13 +8,13 @@
 package org.eclipse.tools.templates.ui;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
-import org.eclipse.jface.viewers.ListViewer;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.wizard.IWizardPage;
 import org.eclipse.jface.wizard.WizardPage;
@@ -33,13 +33,24 @@ import org.eclipse.tools.templates.ui.internal.TemplateTable;
 public class TemplateSelectionPage extends WizardPage {
 
 	private final String[] requestedTags;
+	private final List<Template> templates;
 
-	private ListViewer tagList;
+	private TagListViewer tagList;
 	private TemplateTable templateTable;
 
 	public TemplateSelectionPage(String pageName, String... tags) {
 		super(pageName);
 		this.requestedTags = tags;
+		TemplateExtension templateExtension = Activator.getTemplateExtension();
+		templates = new ArrayList<>();
+		for (Template template : templateExtension.getTemplates()) {
+			for (String requestedTag : requestedTags) {
+				if (template.hasTag(requestedTag)) {
+					templates.add(template);
+					break;
+				}
+			}
+		}
 	}
 
 	@Override
@@ -51,6 +62,18 @@ public class TemplateSelectionPage extends WizardPage {
 		tagList.addSelectionChangedListener(new ISelectionChangedListener() {
 			@Override
 			public void selectionChanged(SelectionChangedEvent event) {
+				Collection<Tag> selectedTags = tagList.getSelectedTags();
+				List<Template> selectedTemplates = new ArrayList<>();
+				for (Template template : templates) {
+					for (Tag tag : selectedTags) {
+						if (template.hasTag(tag.getId())) {
+							selectedTemplates.add(template);
+							break;
+						}
+					}
+				}
+
+				templateTable.setTemplates(selectedTemplates);
 			}
 		});
 
@@ -69,17 +92,6 @@ public class TemplateSelectionPage extends WizardPage {
 			}
 		});
 
-		TemplateExtension templateExtension = Activator.getTemplateExtension();
-		List<Template> templates = new ArrayList<>();
-		for (Template template : templateExtension.getTemplates()) {
-			for (String requestedTag : requestedTags) {
-				if (template.hasTag(requestedTag)) {
-					templates.add(template);
-					break;
-				}
-			}
-		}
-
 		Set<Tag> tags = new HashSet<>();
 		for (Template template : templates) {
 			tags.addAll(template.getTags());
@@ -87,7 +99,7 @@ public class TemplateSelectionPage extends WizardPage {
 
 		templateTable.setTemplates(templates);
 		tagList.setInput(tags);
-		tagList.getList().select(0);
+		tagList.getList().select(0); // All
 		
 		form.setWeights(new int[] { 20, 80 });
 	}

bundles/org.eclipse.tools.templates.ui/src/org/eclipse/tools/templates/ui/internal/TagListViewer.java

@@ -7,9 +7,12 @@
  *******************************************************************************/
 package org.eclipse.tools.templates.ui.internal;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
 
 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.LabelProvider;
@@ -19,6 +22,8 @@ import org.eclipse.swt.widgets.Composite;
 
 public class TagListViewer extends ListViewer {
 
+	private Tag[] tags;
+
 	public TagListViewer(Composite parent, int style) {
 		super(parent, style);
 
@@ -34,8 +39,6 @@ public class TagListViewer extends ListViewer {
 		});
 
 		setContentProvider(new IStructuredContentProvider() {
-			private Tag[] tags;
-
 			@Override
 			public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 				if (newInput != null) {
@@ -69,4 +72,15 @@ public class TagListViewer extends ListViewer {
 		});
 	}
 
+	public Collection<Tag> getSelectedTags() {
+		List<Tag> selectedTags = new ArrayList<>();
+		Iterator<Object> i = getStructuredSelection().iterator();
+		while (i.hasNext()) {
+			Tag tag = (Tag) i.next();
+			selectedTags.add(tag);
+		}
+
+		return selectedTags;
+	}
+
 }

bundles/org.eclipse.tools.templates.ui/src/org/eclipse/tools/templates/ui/internal/Template.java

@@ -65,6 +65,11 @@ public class Template {
 	}
 
 	public boolean hasTag(String tagId) {
+		if (tagId.equals(Tag.ALL_ID)) {
+			// All means all
+			return true;
+		}
+
 		initTags();
 		return tags.containsKey(tagId);
 	}

bundles/org.eclipse.tools.templates.ui/src/org/eclipse/tools/templates/ui/internal/TemplateTable.java

@@ -49,7 +49,7 @@ public class TemplateTable implements Listener {
 	}
 
 	public void setTemplates(Collection<Template> templates) {
-		table.clearAll();
+		table.removeAll();
 		for (Template template : templates) {
 			TableItem item = new TableItem(table, SWT.NONE);
 			item.setData(template);