X-Git-Url: http://www.entropy.ch/git/LeanCalc.git/blobdiff_plain/3dfd487304453e1e5546a01add449fdc45de3454..ffa749385a50695ec814776fa667d9f1f267b47c:/Sources/MyDocument.m

diff --git a/Sources/MyDocument.m b/Sources/MyDocument.m
index 519ffe0..a273168 100644
--- a/Sources/MyDocument.m
+++ b/Sources/MyDocument.m
@@ -59,27 +59,22 @@
 
 
 - (BOOL)lastItemIsSelected {
-	
 	id lastObject = [calculations lastObject];
 	id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
-
 	return selectedObject == lastObject;
 }
 
 
 - (void)addItem {
-
 	Calculation *newcalc = [[[Calculation alloc] init] autorelease];
 	[arrayController addObject:newcalc];
 	int count = [calculations count];
 	id secondtolast = [calculations objectAtIndex:count - 2];
 	[secondtolast setValue:newcalc forKey:@"next"];
-	
 }
 
 
 - (void)insertPrevious:(NSNumber *)sender {
-
 	int index = [sender intValue];
 	if ([calculations count] <= index) return;
 	
@@ -97,6 +92,23 @@
 }
 
 
+// enable copy: menu command only when a previous result is selected
+- (BOOL)validateMenuItem:(NSMenuItem *)item {
+	if ([item action] != @selector(copy:)) return YES;
+	id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
+	return selectedObject && ![self lastItemIsSelected] && ![selectedObject expressionIsEmpty];
+}
+
+
+- (IBAction)copy:(id)sender {
+	NSPasteboard *pboard = [NSPasteboard generalPasteboard];
+	[pboard declareTypes:[NSArray arrayWithObject:NSStringPboardType] owner:nil];
+	id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
+	[pboard setString:[selectedObject result] forType:NSStringPboardType];
+}
+
+
+
 
 - (NSString *)windowNibName {
     return @"MyDocument";