Merge pull request #281 from gnustep/NSBrowser_branch

Add new 10.6 delegate methods to NSBrowserDelegate

ChangeLog

@@ -1,3 +1,10 @@
+2024-07-25 Gregory John Casamento <greg.casamento@gmail.com>
+
+	* Headers/AppKit/NSBrowser.h: Add declarations for
+	10.6 delegate methods for item-based browsers.
+	* Source/NSBrowser.m: Add support for 10.6 item-based
+	delegate methods.
+
 2024-06-28 Gregory John Casamento <greg.casamento@gmail.com>
 
 	* Headers/AppKit/AppKit.h: Add NSMenuToolbarItem.h

Headers/AppKit/NSBrowser.h

@@ -42,7 +42,7 @@
 @class NSEvent;
 @class NSMatrix;
 @class NSScroller;
-//@class NSBox;
+@class NSViewController;
 
 #if OS_API_VERSION(MAC_OS_X_VERSION_10_3, GS_API_LATEST)
 enum _NSBrowserColumnResizingType
@@ -62,7 +62,6 @@ APPKIT_EXPORT_CLASS
   Class _browserMatrixClass;
   NSString *_pathSeparator;
   
-  //NSBox *_horizontalScrollerBox;
   NSScroller *_horizontalScroller;
   NSTimeInterval _lastKeyPressed;
   NSString *_charBuffer;
@@ -99,6 +98,8 @@ APPKIT_EXPORT_CLASS
   int _lastVisibleColumn;
   NSString *_columnsAutosaveName;
   NSBrowserColumnResizingType _columnResizing;
+
+  BOOL _itemBasedDelegate;
 }
 
 //
@@ -355,6 +356,31 @@ canDragRowsWithIndexes: (NSIndexSet *)rowIndexes
         inColumn: (NSInteger)column
        withEvent: (NSEvent *)event;
 #endif
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_6, GS_API_LATEST)
+- (NSInteger) browser: (NSBrowser *)browser
+numberOfChildrenOfItem: (id)item;
+- (id) browser: (NSBrowser *)browser
+         child: (NSInteger)index
+        ofItem: (id)item;
+- (BOOL) browser: (NSBrowser *)browser
+      isLeafItem: (id)item;
+- (BOOL) browser: (NSBrowser *)browser
+  shouldEditItem: (id)item;
+- (id) browser: (NSBrowser *)browser
+objectValueForItem: (id)item;
+- (id) browser: (NSBrowser *)browser
+setObjectValue: (id)object
+       forItem: (id)item;
+- (id) rootItemForBrowser: (NSBrowser *)browser;
+- (NSViewController *) browser: (NSBrowser *)browser
+previewViewControllerForLeafItem: (id)item;
+- (NSViewController *) browser: (NSBrowser *)browser
+   headerViewControllerForItem: (id)item;
+- (void) browser: (NSBrowser *)browser
+didChangeLastColumn: (NSInteger)oldLastColumn
+        toColumn: (NSInteger)column;
+#endif
+
 @end
 
 #if OS_API_VERSION(MAC_OS_X_VERSION_10_3, GS_API_LATEST)

Source/NSBrowser.m

@@ -14,6 +14,9 @@
    Date: September 2000
    Author:  Fred Kiefer <FredKiefer@gmx.de>
    Date: September 2002
+   Author:  Gregory Casamento <greg.casamento@gmail.com>
+   Date: July 2024
+   Note: Added support for 10.6+ delegate methods.
 
    This file is part of the GNUstep GUI Library.
 
@@ -34,34 +37,38 @@
    Boston, MA 02110-1301, USA.
 */
 
-#include <math.h>                  // (float)rintf(float x)
+#include <math.h> // (float)rintf(float x}
 #import "config.h"
+
 #import <Foundation/NSArray.h>
 #import <Foundation/NSDebug.h>
+#import <Foundation/NSDictionary.h>
 #import <Foundation/NSException.h>
 #import <Foundation/NSIndexPath.h>
 #import <Foundation/NSNotification.h>
 #import <Foundation/NSUserDefaults.h>
+
+#import "AppKit/AppKitExceptions.h"
+#import "AppKit/NSBezierPath.h"
 #import "AppKit/NSBrowser.h"
 #import "AppKit/NSBrowserCell.h"
-#import "AppKit/AppKitExceptions.h"
-#import "AppKit/NSScroller.h"
 #import "AppKit/NSCell.h"
 #import "AppKit/NSColor.h"
 #import "AppKit/NSFont.h"
-#import "AppKit/NSScrollView.h"
 #import "AppKit/NSGraphics.h"
 #import "AppKit/NSMatrix.h"
+#import "AppKit/NSScroller.h"
+#import "AppKit/NSScrollView.h"
 #import "AppKit/NSTableHeaderCell.h"
 #import "AppKit/NSEvent.h"
+#import "AppKit/NSViewController.h"
 #import "AppKit/NSWindow.h"
-#import "AppKit/NSBezierPath.h"
-#import "GNUstepGUI/GSTheme.h"
 
+#import "GNUstepGUI/GSTheme.h"
 #import "GSGuiPrivate.h"
 
 /* Cache */
-static CGFloat scrollerWidth; // == [NSScroller scrollerWidth]
+static CGFloat scrollerWidth; // == [NSScroller scrollerWidth];
 static NSTextFieldCell *titleCell;
 static CGFloat browserColumnSeparation;
 static CGFloat browserVerticalPadding;
@@ -245,6 +252,7 @@ static BOOL browserUseBezels;
 @interface NSBrowser (Private)
 - (NSString *) _getTitleOfColumn: (NSInteger)column;
 - (void) _performLoadOfColumn: (NSInteger)column;
+- (id) _itemForColumn: (NSInteger)column;
 - (void) _remapColumnSubviews: (BOOL)flag;
 - (void) _setColumnTitlesNeedDisplay;
 - (NSBorderType) _resolvedBorderType;
@@ -1218,6 +1226,7 @@ static BOOL browserUseBezels;
 
   // Perform the data load
   [self _performLoadOfColumn: column];
+
   // set last column loaded
   [self setLastColumn: column];
 
@@ -1620,13 +1629,26 @@ static BOOL browserUseBezels;
 	    inRect: (NSRect)aRect
 	  ofColumn: (NSInteger)column
 {
+  NSView *cv = nil;
+
   if (!_isTitled || !NSBR_COLUMN_IS_VISIBLE(column))
     return;
 
-//  [titleCell setControlView: self];
+  if (_itemBasedDelegate == YES)
+    {
+      SEL sel = @selector(browser:headerViewControllerForItem:);
+      if ([_browserDelegate respondsToSelector: sel])
+	{
+	  id item = [self _itemForColumn: column];
+	  NSViewController *vc = nil;
+	  vc = [_browserDelegate browser: self headerViewControllerForItem: item];
+	  cv = [vc view];
+	}
+    }
+
   [titleCell setStringValue: title];
   [titleCell drawWithFrame: aRect inView: self];
-  [titleCell setControlView: nil];
+  [titleCell setControlView: cv];
 }
 
 /** <p>Returns the height of column titles. The Nextish look returns 21.</p>
@@ -2242,7 +2264,20 @@ static BOOL browserUseBezels;
 
   /* Default to YES for nil delegate.  */
   _passiveDelegate = YES;
+  _itemBasedDelegate = NO;
 
+  if ([anObject respondsToSelector:
+		  @selector(browser:numberOfChildrenOfItem:)]
+      && [anObject respondsToSelector:
+		    @selector(browser:child:ofItem:)]
+      && [anObject respondsToSelector:
+		    @selector(browser:isLeafItem:)])
+    {
+      _passiveDelegate = NO;
+      _itemBasedDelegate = YES;
+    }
+  else
+    {
       if ([anObject respondsToSelector:
 		     @selector(browser:numberOfRowsInColumn:)])
 	{
@@ -2282,6 +2317,7 @@ static BOOL browserUseBezels;
 		     (@selector(browser:numberOfRowsInColumn:)),
 		     GSNameFromSelector
 		     (@selector(browser:createRowsForColumn:inMatrix:))];
+    }
 
   _browserDelegate = anObject;
 }
@@ -2519,6 +2555,9 @@ static BOOL browserUseBezels;
   _maxVisibleColumns = 3;
   [self _createColumn];
 
+  // Item based delegate, 10.6+
+  _itemBasedDelegate = NO;
+
   [[NSNotificationCenter defaultCenter]
     addObserver: self
     selector: @selector(_themeDidActivate:)
@@ -2965,6 +3004,9 @@ static BOOL browserUseBezels;
       if (_minColumnWidth < 100.0)
 	_minColumnWidth = 100.0;
 
+      // Item based delegate, 10.6+
+      _itemBasedDelegate = NO;
+
       // Horizontal scroller
       _scrollerRect.origin.x = bs.width;
       _scrollerRect.origin.y = bs.height;
@@ -3248,6 +3290,41 @@ static BOOL browserUseBezels;
     }
 }
 
+- (id) _itemForColumn: (NSInteger)column
+{
+  id item = nil;
+
+  if (column == 0)
+    {
+      item = [_browserDelegate rootItemForBrowser: self];
+    }
+  else
+    {
+      NSInteger col = column - 1;
+      NSBrowserColumn *bc;
+
+      bc = [_browserColumns objectAtIndex: col];
+      if (bc != nil)
+	{
+	  NSMatrix *matrix;
+
+	  matrix = [bc columnMatrix];
+	  if (matrix != nil)
+	    {
+	      NSArray *selectedCells = [matrix selectedCells];
+	      if (selectedCells != nil && [selectedCells count] > 0)
+		{
+		  id cell = [selectedCells objectAtIndex: 0];
+
+		  item = [cell objectValue];
+		}
+	    }
+	}
+    }
+
+  return item;
+}
+
 /* Loads column 'column' (asking the delegate). */
 - (void) _performLoadOfColumn: (NSInteger)column
 {
@@ -3255,8 +3332,18 @@ static BOOL browserUseBezels;
   NSScrollView *sc;
   NSMatrix *matrix;
   NSInteger i, rows, cols;
+  id child = nil;
+  id item = nil;
 
-  if (_passiveDelegate)
+  if (_itemBasedDelegate)
+    {
+      item = [self _itemForColumn: column];
+
+      // Ask the delegate for the number of rows for a given item...
+      rows = [_browserDelegate browser: self numberOfChildrenOfItem: item];
+      cols = 1;
+    }
+  else if (_passiveDelegate)
     {
       // Ask the delegate for the number of rows
       rows = [_browserDelegate browser: self numberOfRowsInColumn: column];
@@ -3319,8 +3406,28 @@ static BOOL browserUseBezels;
     }
   [sc setDocumentView: matrix];
 
-  // Loading is different based upon passive/active delegate
+  // Loading is different based upon item/passive/active delegate
-  if (_passiveDelegate)
+  if (_itemBasedDelegate)
+    {
+      // Iterate over the children for the item....
+      for (i = 0; i < rows; i++)
+	{
+	  id aCell = [matrix cellAtRow: i column: 0];
+	  if (![aCell isLoaded])
+	    {
+	      BOOL leaf = YES;
+	      id val = nil;
+
+	      child = [_browserDelegate browser: self child: i ofItem: item];
+	      leaf = [_browserDelegate browser: self isLeafItem: child];
+	      val = [_browserDelegate browser: self objectValueForItem: child];
+	      [aCell setLeaf: leaf];
+	      [aCell setObjectValue: val];
+	      [aCell setLoaded: YES];
+	    }
+	}
+    }
+  else if (_passiveDelegate)
     {
       // Now loop through the cells and load each one
       id aCell;