From 8550bd18d28e55c54d9c21180e7bd2d004a65e9b Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Wed, 2 Dec 2015 08:23:18 -0500
Subject: [PATCH] Remove -[DebuggerBackEndDelegate sourceUpdated:].

Use KVO to call -[DebuggerController updateSourceViewer] instead.
---
 Source/DebuggerBackEnd.h    |  4 ----
 Source/DebuggerBackEnd.m    |  2 --
 Source/DebuggerController.m | 14 ++++++--------
 3 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/Source/DebuggerBackEnd.h b/Source/DebuggerBackEnd.h
index 08bdf0b..135e572 100644
--- a/Source/DebuggerBackEnd.h
+++ b/Source/DebuggerBackEnd.h
@@ -91,9 +91,5 @@
 // Called when we disconnect.
 - (void)debuggerDisconnected;
 
-// Tells the debugger that new source is available for the given frame.
-// TODO: rename to |-frameUpdated:|.
-- (void)sourceUpdated:(StackFrame*)frame;
-
 @end
 
diff --git a/Source/DebuggerBackEnd.m b/Source/DebuggerBackEnd.m
index f9f64cd..e672e95 100644
--- a/Source/DebuggerBackEnd.m
+++ b/Source/DebuggerBackEnd.m
@@ -157,8 +157,6 @@
   if ([frame.filename length]) {
     ProtocolClientMessageHandler handler = ^(NSXMLDocument* message) {
       frame.source = [[message rootElement] base64DecodedValue];
-      if ([self.delegate respondsToSelector:@selector(sourceUpdated:)])
-        [self.delegate sourceUpdated:frame];
     };
     [_client sendCommandWithFormat:@"source -f %@" handler:handler, frame.filename];
   }
diff --git a/Source/DebuggerController.m b/Source/DebuggerController.m
index c97dcc1..7bcf520 100644
--- a/Source/DebuggerController.m
+++ b/Source/DebuggerController.m
@@ -81,6 +81,10 @@
                          forKeyPath:@"selectedObjects"
                             options:NSKeyValueObservingOptionNew
                             context:nil];
+  [stackArrayController addObserver:self
+                         forKeyPath:@"selection.source"
+                            options:NSKeyValueObservingOptionNew
+                            context:nil];
   self.connection.autoAttach = [attachedCheckbox_ state] == NSOnState;
 }
 
@@ -94,6 +98,8 @@
   if (object == stackArrayController && [keyPath isEqualToString:@"selectedObjects"]) {
     for (StackFrame* frame in stackArrayController.selectedObjects)
       [connection loadStackFrame:frame];
+  } else if (object == stackArrayController && [keyPath isEqualToString:@"selection.source"]) {
+    [self updateSourceViewer];
   } else {
     [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
   }
@@ -249,7 +255,6 @@
  */
 - (void)tableViewSelectionDidChange:(NSNotification*)notif
 {
-  [self updateSourceViewer];
   // TODO: This is very, very hacky because it's nondeterministic. The issue
   // is that calling |-[NSOutlineView expandItem:]| while the table is still
   // doing its redraw will translate to a no-op. Instead, we need to restructure
@@ -367,11 +372,4 @@
   [sourceViewer setNeedsDisplay:YES];
 }
 
-#pragma mark GDBpConnectionDelegate
-
-- (void)sourceUpdated:(StackFrame*)frame
-{
-  [self updateSourceViewer];
-}
-
 @end
-- 
2.22.5