Bug 550046 - Copy TextUtils to support broader range of Nebula versions
* cause is internal API change on Nebula side
Change-Id: Ib82f1489df8525afe2296e0fe273b86f3a46d8ea
Signed-off-by: Johannes Faltermeier <jfaltermeier@eclipsesource.com>
diff --git a/bundles/org.eclipse.emf.ecp.view.table.ui.nebula.grid/src/org/eclipse/emf/ecp/view/internal/table/nebula/grid/CustomSelectionColorCellRenderer.java b/bundles/org.eclipse.emf.ecp.view.table.ui.nebula.grid/src/org/eclipse/emf/ecp/view/internal/table/nebula/grid/CustomSelectionColorCellRenderer.java
index 60abc81..0c267e5 100644
--- a/bundles/org.eclipse.emf.ecp.view.table.ui.nebula.grid/src/org/eclipse/emf/ecp/view/internal/table/nebula/grid/CustomSelectionColorCellRenderer.java
+++ b/bundles/org.eclipse.emf.ecp.view.table.ui.nebula.grid/src/org/eclipse/emf/ecp/view/internal/table/nebula/grid/CustomSelectionColorCellRenderer.java
@@ -35,7 +35,6 @@
import org.eclipse.nebula.widgets.grid.IInternalWidget;
import org.eclipse.nebula.widgets.grid.internal.BranchRenderer;
import org.eclipse.nebula.widgets.grid.internal.CheckBoxRenderer;
-import org.eclipse.nebula.widgets.grid.internal.TextUtils;
import org.eclipse.nebula.widgets.grid.internal.ToggleRenderer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
diff --git a/bundles/org.eclipse.emf.ecp.view.table.ui.nebula.grid/src/org/eclipse/emf/ecp/view/internal/table/nebula/grid/TextUtils.java b/bundles/org.eclipse.emf.ecp.view.table.ui.nebula.grid/src/org/eclipse/emf/ecp/view/internal/table/nebula/grid/TextUtils.java
new file mode 100644
index 0000000..d5cd803
--- /dev/null
+++ b/bundles/org.eclipse.emf.ecp.view.table.ui.nebula.grid/src/org/eclipse/emf/ecp/view/internal/table/nebula/grid/TextUtils.java
@@ -0,0 +1,213 @@
+/*******************************************************************************
+ * Copyright (c) 2019 EclipseSource Muenchen GmbH and others.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ * Johannes Faltermeier - Copied when updating from Nebula 2.1 to 2.2
+ ******************************************************************************/
+// REUSED CLASS
+/*******************************************************************************
+ * Copyright (c) 2006 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
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * chris.gross@us.ibm.com - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.emf.ecp.view.internal.table.nebula.grid;
+
+import org.eclipse.swt.graphics.GC;
+
+/**
+ * Utility class to provide common operations on strings not supported by the
+ * base java API.
+ *
+ * @author chris.gross@us.ibm.com
+ * @author Mirko Paturzo <mirko.paturzo@exeura.eu>
+ * @author gongguangyong@live.cn
+ *
+ * Mirko modified the pivot calculation for improve short text provider performance.
+ * The pivot number is calculate starting from the size of the cell provided
+ *
+ * @since 2.0.0
+ */
+public class TextUtils {
+
+ /**
+ * Shortens a supplied string so that it fits within the area specified by
+ * the width argument. Strings that have been shorted have an "..." attached
+ * to the end of the string. The width is computed using the
+ * {@link GC#textExtent(String)}.
+ *
+ * @param gc GC used to perform calculation.
+ * @param t text to modify.
+ * @param width Pixels to display.
+ * @return shortened string that fits in area specified.
+ * @deprecated when text is large, performance is poor, possible occur OOM exception. suggest use
+ * {@link #getShortStr(GC, String, int)}
+ */
+ @Deprecated
+ public static String getShortText(GC gc, String t, int width) {
+ if (t == null) {
+ return null;
+ }
+
+ if (t.equals("")) { //$NON-NLS-1$
+ return ""; //$NON-NLS-1$
+ }
+
+ if (width >= gc.textExtent(t).x) {
+ return t;
+ }
+
+ final int w = gc.textExtent("...").x; //$NON-NLS-1$
+ String text = t;
+ final int l = text.length();
+ final int pivot = l / 2;
+ int s = pivot;
+ int e = pivot + 1;
+
+ while (s >= 0 && e < l) {
+ final String s1 = text.substring(0, s);
+ final String s2 = text.substring(e, l);
+ final int l1 = gc.textExtent(s1).x;
+ final int l2 = gc.textExtent(s2).x;
+ if (l1 + w + l2 < width) {
+ text = s1 + "..." + s2; //$NON-NLS-1$
+ break;
+ }
+ s--;
+ e++;
+ }
+
+ if (s == 0 || e == l) {
+ text = text.substring(0, 1) + "..." + text.substring(l - 1, l); //$NON-NLS-1$
+ }
+
+ return text;
+ }
+
+ /**
+ * Shortens a supplied string so that it fits within the area specified by
+ * the width argument. Strings that have been shorted have an "..." attached
+ * to the end of the string. The width is computed using the
+ * {@link GC#stringExtent(String)}.
+ *
+ * @param gc GC used to perform calculation.
+ * @param t text to modify.
+ * @param width Pixels to display.
+ * @return shortened string that fits in area specified.
+ * @deprecated when text is large, performance is poor, possible occur OOM exception. suggest use
+ * {@link #getShortStr(GC, String, int)}
+ */
+ @Deprecated
+ public static String getShortString(GC gc, String t, int width) {
+ if (t == null) {
+ return null;
+ }
+
+ if (t.equals("")) { //$NON-NLS-1$
+ return ""; //$NON-NLS-1$
+ }
+
+ final int textWidth = gc.stringExtent(t).x;
+ if (width >= textWidth) {
+ return t;
+ }
+ String text = t;
+ final int l = text.length();
+ final int w = gc.stringExtent("...").x; //$NON-NLS-1$
+ final double midChar = (double) textWidth / l;
+ final int pivot = (int) (width / midChar / 2);
+ int s = pivot;
+ int e = l - pivot + 1;
+
+ while (s >= 0 && e < l) {
+ final String s1 = text.substring(0, s);
+ final String s2 = text.substring(e, l);
+ final int l1 = gc.stringExtent(s1).x;
+ final int l2 = gc.stringExtent(s2).x;
+ if (l1 + w + l2 < width) {
+ text = s1 + "..." + s2; //$NON-NLS-1$
+ break;
+ }
+ s--;
+ e++;
+ }
+
+ if (s == 0 || e == l) {
+ text = text.substring(0, 1) + "..." + text.substring(l - 1, l); //$NON-NLS-1$
+ }
+
+ return text;
+ }
+
+ /**
+ * Shortens a supplied string so that it fits within the area specified by
+ * the width argument. Strings that have been shorted have an "..." attached
+ * to the end of the string. The width is computed using the
+ * {@link GC#getCharWidth(char)}.
+ *
+ * @param gc GC used to perform calculation.
+ * @param t text to modify.
+ * @param width Pixels to display.
+ * @return shortened string that fits in area specified.
+ */
+ public static String getShortStr(GC gc, String t, int width) {
+ if (t == null || t.equals("")) { //$NON-NLS-1$
+ return t;
+ }
+
+ if (width >= gc.stringExtent(t).x) {
+ return t;
+ }
+
+ final char[] chars = t.toCharArray();
+ final int length = chars.length;
+ int left = 0;
+ int right = length - 1;
+ int calcWidth = gc.stringExtent("...").x; //$NON-NLS-1$
+
+ while (left < right) {
+ int step = gc.getCharWidth(chars[left]);
+ calcWidth += step;
+ if (calcWidth >= width) {
+ break;
+ }
+ left++;
+
+ step = gc.getCharWidth(chars[right]);
+ calcWidth += step;
+ if (calcWidth >= width) {
+ break;
+ }
+ right--;
+ }
+ if (left >= right) {
+ return t;
+ }
+ final StringBuilder builder = new StringBuilder(left + length - right + 4);
+ if (left == 0 || right == length - 1) {
+ builder.append(chars[0]).append("...").append(chars[length - 1]); //$NON-NLS-1$
+ } else {
+ final int leftLen = left == 1 ? left : left - 1;
+ builder.append(chars, 0, leftLen).append("...").append(chars, right + 1, length - right - 1); //$NON-NLS-1$
+ }
+ return builder.toString();
+ }
+
+ /**
+ * private constructor to prevent instantiation.
+ */
+ private TextUtils() {
+ // is empty
+ }
+}
