From 2e3b24de1f1bf6af3e763cb5944e82772450927d Mon Sep 17 00:00:00 2001
From: Ingo Weigelt
Date: Mon, 26 Mar 2012 17:31:27 +0200
Subject: fixed Bug 375240: Capture the first character when starting to edit
 in SpecEditor

---
 .../editor/agilegrid/ProrAgileGridViewer.java      |  2 +
 .../reqif10/editor/agilegrid/ProrCellEditor.java   | 52 ++++++++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/org.eclipse.rmf.pror.reqif10.editor/src/org/eclipse/rmf/pror/reqif10/editor/agilegrid/ProrAgileGridViewer.java b/org.eclipse.rmf.pror.reqif10.editor/src/org/eclipse/rmf/pror/reqif10/editor/agilegrid/ProrAgileGridViewer.java
index 263cc7d9..9d126ffc 100644
--- a/org.eclipse.rmf.pror.reqif10.editor/src/org/eclipse/rmf/pror/reqif10/editor/agilegrid/ProrAgileGridViewer.java
+++ b/org.eclipse.rmf.pror.reqif10.editor/src/org/eclipse/rmf/pror/reqif10/editor/agilegrid/ProrAgileGridViewer.java
@@ -19,6 +19,7 @@ import java.util.Set;
 import org.agilemore.agilegrid.AgileGrid;
 import org.agilemore.agilegrid.Cell;
 import org.agilemore.agilegrid.CellResizeAdapter;
+import org.agilemore.agilegrid.EditorActivationStrategy;
 import org.agilemore.agilegrid.ICellResizeListener;
 import org.agilemore.agilegrid.ISelectionChangedListener;
 import org.agilemore.agilegrid.SWTX;
@@ -122,6 +123,7 @@ public class ProrAgileGridViewer extends Viewer {
 				| SWTX.FILL_WITH_LASTCOL | SWT.MULTI | SWT.DOUBLE_BUFFERED);
 		agileGrid.setLayoutAdvisor(new ProrLayoutAdvisor(agileGrid));
 		// agileGrid.setAgileGridEditor(new ProrAgileGridEditor(agileGrid));
+		agileGrid.setEditorActivationStrategy(new EditorActivationStrategy(agileGrid, true));
 		this.editingDomain = editingDomain;
 		this.adapterFactory = adapterFactory;
 		enableDragNDrop();
diff --git a/org.eclipse.rmf.pror.reqif10.editor/src/org/eclipse/rmf/pror/reqif10/editor/agilegrid/ProrCellEditor.java b/org.eclipse.rmf.pror.reqif10.editor/src/org/eclipse/rmf/pror/reqif10/editor/agilegrid/ProrCellEditor.java
index 69d91efe..dfbb9429 100644
--- a/org.eclipse.rmf.pror.reqif10.editor/src/org/eclipse/rmf/pror/reqif10/editor/agilegrid/ProrCellEditor.java
+++ b/org.eclipse.rmf.pror.reqif10.editor/src/org/eclipse/rmf/pror/reqif10/editor/agilegrid/ProrCellEditor.java
@@ -11,6 +11,7 @@
 package org.eclipse.rmf.pror.reqif10.editor.agilegrid;
 
 import org.agilemore.agilegrid.AgileGrid;
+import org.agilemore.agilegrid.EditorActivationEvent;
 import org.agilemore.agilegrid.editors.TextCellEditor;
 import org.eclipse.emf.edit.domain.EditingDomain;
 import org.eclipse.jface.action.IStatusLineManager;
@@ -19,6 +20,7 @@ import org.eclipse.rmf.reqif10.Identifiable;
 import org.eclipse.rmf.reqif10.SpecHierarchy;
 import org.eclipse.rmf.reqif10.util.Reqif10Util;
 import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.KeyEvent;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.ui.IEditorSite;
@@ -128,4 +130,54 @@ public abstract class ProrCellEditor extends TextCellEditor {
 	 */
 	@Override
 	abstract protected Object doGetValue();
+	
+	/**
+	 * Changes the TextCellEditor behavior to capture the first character when
+	 * starting to edit. I.e. if one activates the edit mode by pressing a
+	 * character key, the current text is replaced by that character.
+	 */
+	@Override
+	public void activate(EditorActivationEvent activationEvent) {
+		if (activationEvent.sourceEvent instanceof KeyEvent) {
+			KeyEvent keyEvent = (KeyEvent) activationEvent.sourceEvent;
+			if (isValidCellEditorCharacter(keyEvent)) {
+				text.setText("" + keyEvent.character);
+				// this.fireApplyEditorValue();
+				super.activate(activationEvent);
+				text.setSelection(1, 1);
+				return;
+			}
+		}
+		super.activate(activationEvent);
+		text.selectAll();
+	}
+
+	/**
+	 * Helper function to determine if a keypress that already triggered editor
+	 * activation is a valid character that can be displayed in the text field.
+	 * 
+	 * @param keyEvent
+	 * @return
+	 */
+	protected boolean isValidCellEditorCharacter(KeyEvent keyEvent) {
+		System.out.println(keyEvent.keyCode);
+		switch (keyEvent.character) {
+		case ' ':
+		case '\r':
+		case SWT.DEL:
+		case SWT.BS:
+			return false;
+		}
+
+		if ((Character.isLetterOrDigit(keyEvent.character) || keyEvent.keyCode > 32
+				&& keyEvent.keyCode < 254 && keyEvent.keyCode != 127)
+				&& keyEvent.keyCode != SWT.CTRL
+				&& keyEvent.keyCode != SWT.ALT
+				&& (keyEvent.stateMask & SWT.CONTROL) == 0
+				&& (keyEvent.stateMask & SWT.ALT) == 0) {
+			return true;
+		}
+
+		return false;
+	}
 }
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