Add issue label attribute editor

Support adding, removing, and creating new labels
associated with an issue.

Change-Id: Ib2435cee187e1d303bdb29d52891fcbf5d1cbe74
Signed-off-by: Kevin Sawicki <kevin@github.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

1 files changed, 250 insertions, 0 deletions

diff --git a/org.eclipse.mylyn.github.ui/src/org/eclipse/mylyn/github/ui/internal/IssueLabelAttributeEditor.java b/org.eclipse.mylyn.github.ui/src/org/eclipse/mylyn/github/ui/internal/IssueLabelAttributeEditor.java
new file mode 100644
index 0000000..559f6ae
--- /dev/null
+++ b/org.eclipse.mylyn.github.ui/src/org/eclipse/mylyn/github/ui/internal/IssueLabelAttributeEditor.java
@@ -0,0 +1,250 @@
+/*******************************************************************************
+ *  Copyright (c) 2011 GitHub Inc.
+ *  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
+ *  http://www.eclipse.org/legal/epl-v10.html
+ *
+ *  Contributors:
+ *    Kevin Sawicki (GitHub Inc.) - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.mylyn.github.ui.internal;
+
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.eclipse.jface.action.Action;
+import org.eclipse.jface.action.IAction;
+import org.eclipse.jface.action.IMenuListener;
+import org.eclipse.jface.action.IMenuManager;
+import org.eclipse.jface.action.MenuManager;
+import org.eclipse.jface.action.Separator;
+import org.eclipse.jface.dialogs.IInputValidator;
+import org.eclipse.jface.dialogs.InputDialog;
+import org.eclipse.jface.layout.GridDataFactory;
+import org.eclipse.jface.layout.GridLayoutFactory;
+import org.eclipse.jface.window.Window;
+import org.eclipse.mylyn.internal.tasks.ui.notifications.TaskDiffUtil;
+import org.eclipse.mylyn.tasks.core.data.TaskAttribute;
+import org.eclipse.mylyn.tasks.core.data.TaskDataModel;
+import org.eclipse.mylyn.tasks.ui.editors.AbstractAttributeEditor;
+import org.eclipse.mylyn.tasks.ui.editors.LayoutHint;
+import org.eclipse.mylyn.tasks.ui.editors.LayoutHint.ColumnSpan;
+import org.eclipse.mylyn.tasks.ui.editors.LayoutHint.RowSpan;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.custom.CLabel;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Menu;
+import org.eclipse.swt.widgets.ToolBar;
+import org.eclipse.swt.widgets.ToolItem;
+import org.eclipse.ui.forms.widgets.FormToolkit;
+
+/**
+ * Editor part for viewing an issue's labels.
+ */
+public class IssueLabelAttributeEditor extends AbstractAttributeEditor {
+
+	/**
+	 * LABEL_WIDTH
+	 */
+	public static final int LABEL_WIDTH = 80;
+
+	/**
+	 * LABEL_COLUMNS
+	 */
+	public static final int LABEL_COLUMNS = 12;
+
+	private class NewLabelAction extends Action {
+
+		public NewLabelAction() {
+			super(Messages.IssueLabelAttributeEditor_ActionNewLabel,
+					IAction.AS_PUSH_BUTTON);
+		}
+
+		public void run() {
+			InputDialog dialog = new InputDialog(getControl().getShell(),
+					Messages.IssueLabelAttributeEditor_TitleNewLabel,
+					Messages.IssueLabelAttributeEditor_DescriptionNewLabel,
+					"", new IInputValidator() { //$NON-NLS-1$
+
+						public String isValid(String newText) {
+							if (newText == null || newText.trim().length() == 0)
+								return Messages.IssueLabelAttributeEditor_MessageEnterName;
+							return null;
+						}
+					});
+			if (Window.OK == dialog.open()
+					&& !getTaskAttribute().getValues().contains(
+							dialog.getValue())) {
+				getTaskAttribute().addValue(dialog.getValue());
+				markLabelsChanged();
+				refreshLabels();
+			}
+		}
+
+	}
+
+	private class RemoveLabelAction extends Action {
+
+		private String label;
+
+		public RemoveLabelAction(String label) {
+			super(Messages.IssueLabelAttributeEditor_ActionRemoveLabel,
+					IAction.AS_PUSH_BUTTON);
+			this.label = label;
+		}
+
+		public void run() {
+			if (getTaskAttribute().getValues().contains(label)) {
+				getTaskAttribute().removeValue(label);
+				markLabelsChanged();
+				refreshLabels();
+			}
+		}
+
+	}
+
+	private class LabelAction extends Action {
+
+		public LabelAction(String label) {
+			super(label, IAction.AS_PUSH_BUTTON);
+			setImageDescriptor(GitHubImages.DESC_GITHUB_ISSUE_LABEL);
+		}
+
+		public void run() {
+			if (!getTaskAttribute().getValues().contains(getText())) {
+				getTaskAttribute().addValue(getText());
+				markLabelsChanged();
+				refreshLabels();
+			}
+		}
+	}
+
+	private Composite displayArea;
+	private boolean layout = false;
+	private Composite labelsArea;
+	private List<CLabel> labelControls = new LinkedList<CLabel>();
+	private FormToolkit toolkit;
+	private Comparator<String> labelComparator = new Comparator<String>() {
+
+		public int compare(String o1, String o2) {
+			return o1.compareToIgnoreCase(o2);
+		}
+	};
+
+	/**
+	 * @param manager
+	 * @param taskAttribute
+	 */
+	public IssueLabelAttributeEditor(TaskDataModel manager,
+			TaskAttribute taskAttribute) {
+		super(manager, taskAttribute);
+		setLayoutHint(new LayoutHint(RowSpan.SINGLE, ColumnSpan.MULTIPLE));
+	}
+
+	private void refreshLabels() {
+		for (CLabel labelControl : this.labelControls)
+			labelControl.dispose();
+		this.labelControls.clear();
+
+		Image labelImage = GitHubImages
+				.get(GitHubImages.GITHUB_ISSUE_LABEL_OBJ);
+		List<String> labels = new LinkedList<String>(getTaskAttribute()
+				.getValues());
+		Collections.sort(labels, this.labelComparator);
+		if (!labels.isEmpty())
+			for (final String label : labels) {
+				CLabel cLabel = new CLabel(labelsArea, SWT.NONE);
+				MenuManager manager = new MenuManager();
+				manager.setRemoveAllWhenShown(true);
+				manager.addMenuListener(new IMenuListener() {
+
+					public void menuAboutToShow(IMenuManager manager) {
+						manager.add(new RemoveLabelAction(label));
+					}
+				});
+				Menu menu = manager.createContextMenu(cLabel);
+				cLabel.setMenu(menu);
+				String shortened = TaskDiffUtil.shortenText(displayArea, label,
+						LABEL_WIDTH);
+				cLabel.setImage(labelImage);
+				cLabel.setText(shortened);
+				cLabel.setForeground(toolkit.getColors().getForeground());
+				if (!shortened.equals(label))
+					cLabel.setToolTipText(label);
+				this.labelControls.add(cLabel);
+			}
+		else
+			this.labelControls.add(new CLabel(labelsArea, SWT.NONE));
+
+		if (this.layout)
+			displayArea.getParent().getParent().layout(true, true);
+	}
+
+	private void markLabelsChanged() {
+		getModel().attributeChanged(getTaskAttribute());
+	}
+
+	/**
+	 * @see org.eclipse.mylyn.tasks.ui.editors.AbstractAttributeEditor#createControl(org.eclipse.swt.widgets.Composite,
+	 *      org.eclipse.ui.forms.widgets.FormToolkit)
+	 */
+	public void createControl(Composite parent, FormToolkit toolkit) {
+		this.toolkit = toolkit;
+		displayArea = toolkit.createComposite(parent);
+		displayArea.setBackgroundMode(SWT.INHERIT_FORCE);
+		GridDataFactory.fillDefaults().grab(true, true).applyTo(displayArea);
+		GridLayoutFactory.fillDefaults().numColumns(2).applyTo(displayArea);
+
+		final ToolBar toolbar = new ToolBar(displayArea, SWT.FLAT);
+		toolkit.adapt(toolbar, false, false);
+		final ToolItem addItem = new ToolItem(toolbar, SWT.DROP_DOWN);
+		addItem.setImage(GitHubImages.get(GitHubImages.GITHUB_ADD_OBJ));
+		addItem.setToolTipText(Messages.IssueLabelAttributeEditor_TooltipAddLabel);
+
+		MenuManager manager = new MenuManager();
+		manager.setRemoveAllWhenShown(true);
+		manager.addMenuListener(new IMenuListener() {
+
+			public void menuAboutToShow(IMenuManager manager) {
+				manager.add(new NewLabelAction());
+				manager.add(new Separator());
+				List<String> labels = new LinkedList<String>(getTaskAttribute()
+						.getOptions().values());
+				labels.removeAll(getTaskAttribute().getValues());
+				for (String label : labels)
+					manager.add(new LabelAction(label));
+				manager.update();
+			}
+		});
+		final Menu menu = manager.createContextMenu(displayArea);
+		addItem.addSelectionListener(new SelectionAdapter() {
+
+			public void widgetSelected(SelectionEvent e) {
+				Rectangle toolItemBounds = addItem.getBounds();
+				Point location = toolbar.toDisplay(toolItemBounds.x,
+						toolItemBounds.y + toolItemBounds.height);
+				menu.setLocation(location);
+				menu.setVisible(true);
+			}
+
+		});
+
+		labelsArea = toolkit.createComposite(displayArea);
+		labelsArea.setBackgroundMode(SWT.INHERIT_FORCE);
+		labelsArea.setBackground(null);
+		GridLayoutFactory.fillDefaults().numColumns(LABEL_COLUMNS)
+				.applyTo(labelsArea);
+		GridDataFactory.swtDefaults().grab(true, true).applyTo(labelsArea);
+		refreshLabels();
+		setControl(displayArea);
+		layout = true;
+	}
+}
\ No newline at end of file