From 798c96e2afafa0dfd41b455a90da12046fee0ac5 Mon Sep 17 00:00:00 2001
From: Bjorn Winckler <bjorn.winckler@gmail.com>
Date: Sun, 9 Jun 2013 15:34:36 +0200
Subject: [PATCH] Respond to backing properties changes

This fixes a bug which caused the window to be white after moving it
between a Retina and normal display.
---
 src/MacVim/MMBackend.m          | 2 ++
 src/MacVim/MMWindowController.m | 5 +++++
 src/MacVim/MacVim.h             | 1 +
 src/MacVim/MacVim.m             | 1 +
 4 files changed, 9 insertions(+)

diff --git a/src/MacVim/MMBackend.m b/src/MacVim/MMBackend.m
index 4b52cda947..05b8f7a109 100644
--- a/src/MacVim/MMBackend.m
+++ b/src/MacVim/MMBackend.m
@@ -2092,6 +2092,8 @@ static void netbeansReadCallback(CFSocketRef s,
         [self setImState:YES];
     } else if (DeactivatedImMsgID == msgid) {
         [self setImState:NO];
+    } else if (BackingPropertiesChangedMsgID == msgid) {
+        [self redrawScreen];
     } else {
         ASLogWarn(@"Unknown message received (msgid=%d)", msgid);
     }
diff --git a/src/MacVim/MMWindowController.m b/src/MacVim/MMWindowController.m
index e3400a47e4..b6c6786bf1 100644
--- a/src/MacVim/MMWindowController.m
+++ b/src/MacVim/MMWindowController.m
@@ -1002,6 +1002,11 @@
     [vimView setFrameSize:[self contentSize]];
 }
 
+- (void)windowDidChangeBackingProperties:(NSNotification *)notification
+{
+    [vimController sendMessage:BackingPropertiesChangedMsgID data:nil];
+}
+
 // This is not an NSWindow delegate method, our custom MMWindow class calls it
 // instead of the usual windowWillUseStandardFrame:defaultFrame:.
 - (IBAction)zoom:(id)sender
diff --git a/src/MacVim/MacVim.h b/src/MacVim/MacVim.h
index b5d74b017c..691c9b4847 100644
--- a/src/MacVim/MacVim.h
+++ b/src/MacVim/MacVim.h
@@ -192,6 +192,7 @@ enum {
     SetTooltipDelayMsgID,
     GestureMsgID,
     AddToMRUMsgID,
+    BackingPropertiesChangedMsgID,
     LastMsgID   // NOTE: MUST BE LAST MESSAGE IN ENUM!
 };
 
diff --git a/src/MacVim/MacVim.m b/src/MacVim/MacVim.m
index 14519d987e..f210c72ea6 100644
--- a/src/MacVim/MacVim.m
+++ b/src/MacVim/MacVim.m
@@ -99,6 +99,7 @@ char *MessageStrings[] =
     "SetTooltipDelayMsgID",
     "GestureMsgID",
     "AddToMRUMsgID",
+    "BackingPropertiesChangedMsgID",
     "END OF MESSAGE IDs"     // NOTE: Must be last!
 };