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/*

 *  R.app : a Cocoa front end to: "R A Computer Language for Statistical Data Analysis"

 *  

 *  R.app Copyright notes:

 *                     Copyright (C) 2004-11  The R Foundation

 *                     written by Stefano M. Iacus and Simon Urbanek

 *

 *                  

 *  R Copyright notes:

 *                     Copyright (C) 1995-1996   Robert Gentleman and Ross Ihaka

 *                     Copyright (C) 1998-2001   The R Development Core Team

 *                     Copyright (C) 2002-2004   The R Foundation

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  A copy of the GNU General Public License is available via WWW at

 *  http://www.gnu.org/copyleft/gpl.html.  You can also obtain it by

 *  writing to the Free Software Foundation, Inc., 59 Temple Place,

 *  Suite 330, Boston, MA  02111-1307  USA.

 *

 *  Code snippets were taken from http://cocotron.googlecode.com/svn/trunk/AppKit/NSTableHeaderView.m

 *  Copyright (c) 2006-2007 Christopher J. W. Lloyd

 *

 *

 *  RDataEditorTableHeaderView.m

 *

 *  Created by Hans-J. Bibiko on 05/07/2011.

 *

 */

#import "RDataEditorTableHeaderView.h"

#import "../REditor.h"

@interface RDataEditorTableHeaderView (Private)

- (NSRect)_resizeRectBeforeColumn:(NSInteger)column;

@end

@implementation RDataEditorTableHeaderView (private)

- (NSRect)_resizeRectBeforeColumn:(NSInteger)column

{

	NSRect rect=[self headerRectOfColumn:column];

	rect.origin.x -= 2;

	rect.size.width = 6;

	return rect;

}

@end

#pragma mark -

@implementation RDataEditorTableHeaderView

// -(void)mouseDown:(NSEvent *)theEvent

// {

// 	// Submit pending changes of column names

// 	if([[[NSApp keyWindow] firstResponder] isKindOfClass:[NSTextView class]])

// 		[[self.tableView delegate] textView:(NSTextView*)[[NSApp keyWindow] firstResponder] doCommandBySelector:@selector(insertNewline:)];

// }

// 

-(void)mouseDown:(NSEvent *)theEvent

{

	NSPoint location = [self convertPoint:[theEvent locationInWindow] fromView:nil];

	NSInteger clickedColumn = [self columnAtPoint:location];

	// Submit pending changes of column names

	if([[[NSApp keyWindow] firstResponder] isKindOfClass:[NSTextView class]])

		[[self.tableView delegate] textView:(NSTextView*)[[NSApp keyWindow] firstResponder] doCommandBySelector:@selector(insertNewline:)];

	// check if delegate implemented tableView:mouseDownInHeaderOfTableColumn:

	if ([[self.tableView delegate] respondsToSelector:@selector(tableView:mouseDownInHeaderOfTableColumn:)]) {

		if(clickedColumn != -1)

			[[self.tableView delegate] tableView:self.tableView mouseDownInHeaderOfTableColumn:[[self.tableView tableColumns] objectAtIndex:clickedColumn]];

		if([[NSApp currentEvent] clickCount] > 1) {

			// deselect clicked column for editing column name and return

			[self.tableView deselectAll:nil];

			return;

		}

	}

	// resizing mode

	if ([self.tableView allowsColumnResizing]) {

		NSInteger i, count=[[self.tableView tableColumns] count];

		// ends editing

		if ([self.tableView editedColumn] != -1 || [self.tableView editedRow] != -1)

			[[self window] endEditingFor:nil];

		for (i = 1; i < count; ++i) {

			if (NSMouseInRect(location, [self _resizeRectBeforeColumn:i], [self isFlipped])) {

				NSTableColumn *resizingColumn = [[self.tableView tableColumns] objectAtIndex:i-1];

				if ([resizingColumn resizingMask] == NSTableColumnNoResizing)

					return;

				//FIXME: self.resizedColumn = i - 1;

				location=[self convertPoint:[theEvent locationInWindow] fromView:nil];

				do {

					NSPoint newPoint;

					NSRect newRect;

					NSInteger q;

					CGFloat newWidth=newPoint.x;

					theEvent=[[self window] nextEventMatchingMask:NSLeftMouseUpMask|NSLeftMouseDraggedMask];

					newPoint=[self convertPoint:[theEvent locationInWindow] fromView:nil];

					newWidth=newPoint.x;

					for (q = 0; q < self.resizedColumn; ++q) {

						newWidth -= [[[self.tableView tableColumns] objectAtIndex:q] width];

						newWidth -= [self.tableView intercellSpacing].width;

					}

					[resizingColumn setWidth:newWidth];

					[self.tableView tile];

					newRect.origin=[self.tableView convertPoint:newPoint fromView:self];

					newRect.size=NSMakeSize(10,10);

					[self.tableView scrollRectToVisible:newRect];

					location=newPoint;

				} while ([theEvent type] != NSLeftMouseUp);

				[[self window] invalidateCursorRectsForView:self];

				//self.resizedColumn = -1;

				return;

			}

		}

	}

	// column selection including the chance to select non-continous columns via holding ⌘

	if ([self.tableView allowsColumnSelection]) {

		// extend/change selection

		if ([theEvent modifierFlags] & NSCommandKeyMask) {

			// deselect previously selected?

			if ([self.tableView isColumnSelected:clickedColumn])

				[self.tableView deselectColumn:clickedColumn];

			else if ([self.tableView allowsMultipleSelection] == YES) {

				// add to selection

				[self.tableView selectColumnIndexes:[NSIndexSet indexSetWithIndex:clickedColumn] byExtendingSelection:YES];

			}

		}

		else if ([theEvent modifierFlags] & NSShiftKeyMask) {

			NSInteger firstColumn = [self.tableView selectedColumn];

			NSInteger lastColumn  = clickedColumn;

			if (firstColumn == -1)

				firstColumn = 0;

			if (firstColumn > lastColumn) {

				lastColumn = firstColumn;

				firstColumn = clickedColumn;

			}

			[self.tableView deselectAll:nil];

			while (firstColumn <= lastColumn)

				[self.tableView selectColumnIndexes:[NSIndexSet indexSetWithIndex:firstColumn++] byExtendingSelection:YES];

		}

		else

			[self.tableView selectColumnIndexes:[NSIndexSet indexSetWithIndex:clickedColumn] byExtendingSelection:NO];

	}

}

@end