mmower/gist:7aba5c24046462284c95 Secret

## gistfile1.txt
// Application Delegate

@interface XKAppDelegate : NSObject <NSApplicationDelegate> {
  NSInteger _previousSelectedRow;
}

@property (assign) IBOutlet NSWindow *window;

@property (assign) IBOutlet NSTableView *tableView;

@end


@implementation XKAppDelegate

@synthesize window = _window;
@synthesize tableView = _tableView;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {


  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowResized:) name:NSWindowDidResizeNotification object:[self window]];

}


- (void)dealloc {
  [[NSNotificationCenter defaultCenter] removeObserver:self];
}


- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
  return 100;
}


- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
  XKMessageView *view = [tableView makeViewWithIdentifier:@"MessageCell" owner:self];

  NSInteger paras = 1 + random() % 32;
  NSMutableString *markup = [NSMutableString stringWithFormat:@"<html>\n<body>\n<h1>Paras = %ld</h1>\n",paras];
  while( paras-- > 0 ) {
    [markup appendFormat:@"<p>Hello from para %ld</p>\n",paras];
  }
  [markup appendFormat:@"</body>\n</html>\n"];

  [[[view webView] mainFrame] loadHTMLString:markup baseURL:[NSURL URLWithString:@"http://127.0.0.1/"]];

  return view;
}


- (void)tableViewSelectionDidChange:(NSNotification *)notification {
  NSTableView *tableView = [notification object];
  NSInteger selectedRow = [tableView selectedRow];

  NSMutableIndexSet *indexes = [[NSMutableIndexSet alloc] init];
  [indexes addIndex:_previousSelectedRow];
  [indexes addIndex:selectedRow];
  [tableView noteHeightOfRowsWithIndexesChanged:indexes];
  _previousSelectedRow = selectedRow;
}


- (CGFloat)tableView:(NSTableView *)tableView heightOfRow:(NSInteger)row {
  CGFloat height = 128.0;

  if( row == [tableView selectedRow] ) {
    XKMessageView *messageView = [tableView viewAtColumn:0 row:row makeIfNecessary:NO];
    if( messageView ) {
      height = MAX( height, [messageView desiredHeight] );
    } else {
      NSLog( @"Cannot obtain webframe to calculate document height" );
    }
  }

  NSLog( @"Height = %g", height );

  return height;
}


- (void)windowResized:(NSNotification *)notification {
  if( [notification object] == [self window] ) {
    XKMessageView *messageView = [[self tableView] viewAtColumn:0 row:[[self tableView] selectedRow] makeIfNecessary:NO];
    [messageView updateDesiredHeightOfWebView];
    [[self tableView] noteHeightOfRowsWithIndexesChanged:[NSIndexSet indexSetWithIndex:[[self tableView] selectedRow]]];
  }
}

// Custom view object for table rows

@interface XKMessageView : NSView

@property (assign) IBOutlet NSView *controlView;
@property (assign) IBOutlet WebView *webView;
@property (assign) CGFloat desiredHeight;

- (void)updateDesiredHeightOfWebView;

@end


@implementation XKMessageView

@synthesize controlView = _controlView;
@synthesize webView = _webView;
@synthesize desiredHeight = _desiredHeight;


- (void)awakeFromNib {
  [[self webView] setFrameLoadDelegate:self];
  [[[[self webView] mainFrame] frameView] setAllowsScrolling:NO];
}


- (void)webView:(WebView *)webView didFinishLoadForFrame:(WebFrame *)webFrame {
  if( webFrame == [[self webView] mainFrame] ) {
    [self updateDesiredHeightOfWebView];
  }
}


- (void)updateDesiredHeightOfWebView {
  WebFrame *mainFrame = [[self webView] mainFrame];
  DOMDocument *document = [mainFrame DOMDocument];

  DOMNodeList *nodes = [document getElementsByTagName:@"body"];
  DOMNode *body = [nodes item:0];
  DOMHTMLBodyElement *bodyElement = (DOMHTMLBodyElement *)body;

  CGFloat contentHeight = [bodyElement offsetHeight];
  NSLog( @"contentHeight = %g", contentHeight );

  [self setDesiredHeight:contentHeight+NSHeight( [[self controlView] frame] )];
}
	// Application Delegate

	@interface XKAppDelegate : NSObject <NSApplicationDelegate> {
	NSInteger _previousSelectedRow;
	}

	@property (assign) IBOutlet NSWindow *window;

	@property (assign) IBOutlet NSTableView *tableView;

	@end


	@implementation XKAppDelegate

	@synthesize window = _window;
	@synthesize tableView = _tableView;

	- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {


	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowResized:) name:NSWindowDidResizeNotification object:[self window]];

	}


	- (void)dealloc {
	[[NSNotificationCenter defaultCenter] removeObserver:self];
	}


	- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
	return 100;
	}


	- (NSView )tableView:(NSTableView )tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
	XKMessageView *view = [tableView makeViewWithIdentifier:@"MessageCell" owner:self];

	NSInteger paras = 1 + random() % 32;
	NSMutableString *markup = [NSMutableString stringWithFormat:@"<html>\n<body>\n<h1>Paras = %ld</h1>\n",paras];
	while( paras-- > 0 ) {
	[markup appendFormat:@"<p>Hello from para %ld</p>\n",paras];
	}
	[markup appendFormat:@"</body>\n</html>\n"];

	[[[view webView] mainFrame] loadHTMLString:markup baseURL:[NSURL URLWithString:@"http://127.0.0.1/"]];

	return view;
	}


	- (void)tableViewSelectionDidChange:(NSNotification *)notification {
	NSTableView *tableView = [notification object];
	NSInteger selectedRow = [tableView selectedRow];

	NSMutableIndexSet *indexes = [[NSMutableIndexSet alloc] init];
	[indexes addIndex:_previousSelectedRow];
	[indexes addIndex:selectedRow];
	[tableView noteHeightOfRowsWithIndexesChanged:indexes];
	_previousSelectedRow = selectedRow;
	}


	- (CGFloat)tableView:(NSTableView *)tableView heightOfRow:(NSInteger)row {
	CGFloat height = 128.0;

	if( row == [tableView selectedRow] ) {
	XKMessageView *messageView = [tableView viewAtColumn:0 row:row makeIfNecessary:NO];
	if( messageView ) {
	height = MAX( height, [messageView desiredHeight] );
	} else {
	NSLog( @"Cannot obtain webframe to calculate document height" );
	}
	}

	NSLog( @"Height = %g", height );

	return height;
	}


	- (void)windowResized:(NSNotification *)notification {
	if( [notification object] == [self window] ) {
	XKMessageView *messageView = [[self tableView] viewAtColumn:0 row:[[self tableView] selectedRow] makeIfNecessary:NO];
	[messageView updateDesiredHeightOfWebView];
	[[self tableView] noteHeightOfRowsWithIndexesChanged:[NSIndexSet indexSetWithIndex:[[self tableView] selectedRow]]];
	}
	}

	// Custom view object for table rows

	@interface XKMessageView : NSView

	@property (assign) IBOutlet NSView *controlView;
	@property (assign) IBOutlet WebView *webView;
	@property (assign) CGFloat desiredHeight;

	- (void)updateDesiredHeightOfWebView;

	@end


	@implementation XKMessageView

	@synthesize controlView = _controlView;
	@synthesize webView = _webView;
	@synthesize desiredHeight = _desiredHeight;


	- (void)awakeFromNib {
	[[self webView] setFrameLoadDelegate:self];
	[[[[self webView] mainFrame] frameView] setAllowsScrolling:NO];
	}


	- (void)webView:(WebView )webView didFinishLoadForFrame:(WebFrame )webFrame {
	if( webFrame == [[self webView] mainFrame] ) {
	[self updateDesiredHeightOfWebView];
	}
	}


	- (void)updateDesiredHeightOfWebView {
	WebFrame *mainFrame = [[self webView] mainFrame];
	DOMDocument *document = [mainFrame DOMDocument];

	DOMNodeList *nodes = [document getElementsByTagName:@"body"];
	DOMNode *body = [nodes item:0];
	DOMHTMLBodyElement bodyElement = (DOMHTMLBodyElement )body;

	CGFloat contentHeight = [bodyElement offsetHeight];
	NSLog( @"contentHeight = %g", contentHeight );

	[self setDesiredHeight:contentHeight+NSHeight( [[self controlView] frame] )];
	}