Add minimal version of predicate editor copied over from mySTEP.

Source/NSRuleEditor.m

@@ -0,0 +1,233 @@
+/** <title>NSRuleEditor</title>
+
+   <abstract>The rule editor class</abstract>
+
+   Copyright (C) 2020 Free Software Foundation, Inc.
+
+   Author: Fred Kiefer <fredkiefer@gmx.de>
+   Date:   January 2020
+
+   This file is part of the GNUstep GUI Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; see the file COPYING.LIB.
+   If not, see <http://www.gnu.org/licenses/> or write to the
+   Free Software Foundation, 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#import "AppKit/NSRuleEditor.h"
+
+
+@implementation NSRuleEditor
+- (void) addRow: (id)sender
+{
+}
+
+- (BOOL) canRemoveAllRows
+{
+  return YES;
+}
+
+- (NSArray *) criteriaForRow: (NSInteger)index
+{
+  return nil;
+}
+
+- (NSString *) criteriaKeyPath
+{
+  return nil;
+}
+
+- (id) delegate
+{
+  return nil;
+}
+
+- (NSArray *) displayValuesForRow: (NSInteger)index
+{
+  return nil;
+}
+
+- (NSString *) displayValuesKeyPath
+{
+  return nil;
+}
+
+- (NSDictionary *) formattingDictionary
+{
+  return nil;
+}
+
+- (NSString *) formattingStringsFilename
+{
+  return nil;
+}
+
+- (void) insertRowAtIndex: (NSInteger)index
+                 withType: (NSRuleEditorRowType)type
+            asSubrowOfRow: (NSInteger)row
+                  animate: (BOOL)flag
+{
+}
+
+- (BOOL) isEditable
+{
+  return YES;
+}
+
+- (NSRuleEditorNestingMode) nestingMode
+{
+  return NSRuleEditorNestingModeSingle;
+}
+
+- (NSInteger) numberOfRows
+{
+  return 0;
+}
+
+- (NSInteger) parentRowForRow: (NSInteger)row
+{
+  return 0;
+}
+
+- (NSPredicate *) predicate
+{
+  return nil;
+}
+
+- (NSPredicate *) predicateForRow: (NSInteger)row
+{
+  return nil;
+}
+
+- (void) reloadCriteria
+{
+}
+
+- (void) reloadPredicate
+{
+}
+
+- (void) removeRowAtIndex: (NSInteger)index
+{
+}
+
+- (void) removeRowsAtIndexes: (NSIndexSet *)rowIds includeSubrows: (BOOL)flag
+{
+}
+
+- (Class) rowClass
+{
+  return nil;
+}
+
+- (NSInteger) rowForDisplayValue: (id)value
+{
+  return 0;
+}
+
+- (CGFloat) rowHeight
+{
+  return 0.0;
+}
+
+- (NSRuleEditorRowType) rowTypeForRow: (NSInteger)row
+{
+  return NSRuleEditorRowTypeSimple;
+}
+
+- (NSString *) rowTypeKeyPath
+{
+  return nil;
+}
+
+- (NSIndexSet *) selectedRowIndexes
+{
+  return nil;
+}
+
+- (void) selectRowIndexes: (NSIndexSet *)ids
+     byExtendingSelection: (BOOL)flag
+{
+}
+
+- (void) setCanRemoveAllRows: (BOOL)flag
+{
+}
+
+- (void) setCriteria: (NSArray *)crits
+    andDisplayValues: (NSArray *)vals
+       forRowAtIndex: (NSInteger)index
+{
+}
+
+- (void) setCriteriaKeyPath: (NSString *)path
+{
+}
+
+- (void) setDelegate: (id)delegate
+{
+}
+
+- (void) setDisplayValuesKeyPath: (NSString *)path
+{
+}
+
+- (void) setEditable: (BOOL)flag
+{
+}
+
+- (void) setFormattingDictionary: (NSDictionary *)dict
+{
+}
+
+- (void) setFormattingStringsFilename: (NSString *)filename
+{
+}
+
+- (void) setNestingMode: (NSRuleEditorNestingMode)flag
+{
+}
+
+- (void) setRowClass: (Class)rowClass
+{
+}
+
+- (void) setRowHeight: (CGFloat)height
+{
+}
+
+- (void) setRowTypeKeyPath: (NSString *)path
+{
+}
+
+- (void) setSubrowsKeyPath: (NSString *)path
+{
+}
+
+- (NSIndexSet *) subrowIndexesForRow: (NSInteger)row
+{
+  return nil;
+}
+
+- (NSString *) subrowsKeyPath
+{
+  return nil;
+}
+
+- (void) viewDidMoveToWindow
+{
+}
+
+@end