From ec6135aade4db14a664840a58a1b1659aa4bd827 Mon Sep 17 00:00:00 2001
From: fredkiefer <fredkiefer@72102866-910b-0410-8b05-ffd578937521>
Date: Tue, 17 Jun 2008 20:20:15 +0000
Subject: [PATCH] Commit scroll adjustment patch by Benhur Stein.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@26678 72102866-910b-0410-8b05-ffd578937521
---
 ChangeLog             |  7 +++++++
 Source/NSClipView.m   | 29 ++++++++++++++++++++++++++++-
 Source/NSScrollView.m | 16 ++++++++++------
 3 files changed, 45 insertions(+), 7 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 629b45d9f..c42402097 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2008-06-17 Fred Kiefer <FredKiefer@gmx.de>
+
+	* Source/NSClipView.m (_scrollToPoint:): New method for adjusted
+	scrolling. 
+	* Source/NSScrollView.m: Use this new method.
+	Patch by Benhur Stein <benhur.stein@gmail.com>.
+	
 2008-06-14  Adam Fedor  <fedor@gnu.org>
 
 	* Version 0.14.0
diff --git a/Source/NSClipView.m b/Source/NSClipView.m
index 837330225..992b0fb82 100644
--- a/Source/NSClipView.m
+++ b/Source/NSClipView.m
@@ -42,6 +42,10 @@
 
 DEFINE_RINT_IF_MISSING
 
+@interface NSClipView (Private)
+- (void) _scrollToPoint: (NSPoint)aPoint;
+@end
+
 /*
  * Return the biggest integral (in device space) rect contained in rect. 
  * Conversion to/from device space is done using view.
@@ -538,7 +542,7 @@ static inline NSRect integralRect (NSRect rect, NSView *view)
  */
 - (void) viewFrameChanged: (NSNotification*)aNotification
 {
-  [self scrollToPoint: _bounds.origin];
+  [self _scrollToPoint: _bounds.origin];
 
   /* If document frame does not completely cover _bounds */
   if (NSContainsRect([_documentView frame], _bounds) == NO)
@@ -817,3 +821,26 @@ static inline NSRect integralRect (NSRect rect, NSView *view)
   return self;
 }
 @end
+
+@implementation NSClipView (Private)
+
+- (void) _scrollToPoint: (NSPoint)aPoint
+{ 
+  NSRect proposedBounds; 
+  NSRect proposedVisibleRect; 
+  NSRect newVisibleRect; 
+  NSRect newBounds; 
+  
+  // give documentView a chance to adjust its visible rectangle 
+  proposedBounds = _bounds; 
+  proposedBounds.origin = aPoint; 
+  proposedVisibleRect = [self convertRect: proposedBounds 
+                              toView: _documentView]; 
+  newVisibleRect = [_documentView adjustScroll: proposedVisibleRect]; 
+  newBounds = [self convertRect: newVisibleRect fromView: _documentView]; 
+  
+  [self scrollToPoint: newBounds.origin]; 
+}
+
+@end
+
diff --git a/Source/NSScrollView.m b/Source/NSScrollView.m
index a66ba297d..43f8910af 100644
--- a/Source/NSScrollView.m
+++ b/Source/NSScrollView.m
@@ -49,6 +49,10 @@
 #include "AppKit/PSOperators.h"
 #include "GNUstepGUI/GSTheme.h"
 
+@interface NSClipView (Private)
+- (void) _scrollToPoint: (NSPoint)aPoint;
+@end
+
 //
 // For nib compatibility, this is used to properly
 // initialize the object from a OS X nib file in initWithCoder:.
@@ -406,7 +410,7 @@ static float scrollerWidth;
 
   /* scrollToPoint: will call reflectScrolledClipView:, which will
    * update rules, headers, and scrollers.  */
-  [_contentView scrollToPoint: point];
+  [_contentView _scrollToPoint: point];
 }
 
 - (void) keyDown: (NSEvent *)theEvent
@@ -462,7 +466,7 @@ static float scrollerWidth;
       amount = -amount;
     }
   point.y = clipViewBounds.origin.y - amount;
-  [_contentView scrollToPoint: point];
+  [_contentView _scrollToPoint: point];
 }
 
 
@@ -490,7 +494,7 @@ static float scrollerWidth;
       amount = -amount;
     }
   point.y = clipViewBounds.origin.y + amount;
-  [_contentView scrollToPoint: point];
+  [_contentView _scrollToPoint: point];
 }
 
 /**
@@ -534,7 +538,7 @@ static float scrollerWidth;
       amount = -amount;
     }
   point.y = clipViewBounds.origin.y - amount;
-  [_contentView scrollToPoint: point];
+  [_contentView _scrollToPoint: point];
 }
 
 /**
@@ -577,7 +581,7 @@ static float scrollerWidth;
       amount = -amount;
     }
   point.y = clipViewBounds.origin.y + amount;
-  [_contentView scrollToPoint: point];
+  [_contentView _scrollToPoint: point];
 }
 
 - (void) _doScroll: (NSScroller*)scroller
@@ -686,7 +690,7 @@ static float scrollerWidth;
 
   /* scrollToPoint will call reflectScrollerClipView, and that will
    * update scrollers, rulers and headers */
-  [_contentView scrollToPoint: point];
+  [_contentView _scrollToPoint: point];
 }
 
 //