[Cocoapsql-developer] commit; moved autoSizeTableColumns to Category

[Olaf v. O. <ol...@ad...>]

Moved the autoSizeColums from PSQLController.m to a new Catergory 
PSQLTableViewCat so the method will be available to all NSTableView's. 
Modified the method to be prepaired for the use of a formatter on 
NSTableColumn's dataCell (not tested!). Further the method name is 
altered and can point to one column or all (-1). The maximum number of 
rows to be processed is part of the method name as well.
"PSQLTableViewCat" Grouped these files and the PSQLTextView files to the 
new Group "ClassExtensions"  in the project.
Added the choice to autosize one or all columns.

Added to PSQLController.m #import "PSQLTableViewCat.h"
Modified PSQLController  submitQuery and setTableShouldAutoSizeColums:
	[self autoSizeTableColumns];
now is
	[tableView autoSizePSQLTableColumn:-1 maxRows:200];

PSQLTableViewCat.h
#import <AppKit/NSTableView.h>

@interface NSTableView ( PSQLTableView )
- (void)autoSizePSQLTableColumn:(int)cn maxRows:(int)r;
@end

PSQLTableViewCat.m
#import "PSQLTableViewCat.h"
#import <Cocoa/Cocoa.h>

@implementation NSTableView ( PSQLTableView )
- (void)autoSizePSQLTableColumn:(int)cn maxRows:(int)r {
	NSFont *dataCellsFont;
	NSDictionary *attributes;
	NSSize cellToCellSpacing, cellsSize;
	float cellWidthFitsAll;
	int i, j, firstColumn, lastColumn;
     NSArray *curColumns = [self tableColumns];
	id curColId;
	id datSo = [self dataSource];
	id formatter;
	NSString *valueWithFormat;
	// need access to dataSource's method 
tableView:objectValueForTableColumn:row:
	SEL targetMethod = @selector(tableView:objectValueForTableColumn:row:);
	if ( ![datSo respondsToSelector:targetMethod] ) {
		NSLog(@"PSQLTableViewCat: need 
tableView:objectValueForTableColumn:row: \n  for calculating column 
width");
		return;
	}
	
	lastColumn = [curColumns count];

	// process one or all columns (or none)
	if ( cn >= 0 ) {
		if ( cn > lastColumn -1 ) {
			NSLog(@"columnNumber grater than number of columns -1");
			return;
		} else {
			firstColumn = cn;
			lastColumn = firstColumn;
		}
	} else {
		firstColumn = 0;
	}
  	
	cellToCellSpacing = [self intercellSpacing];
	for(i=firstColumn;i<lastColumn;i++) {
		// headerCell
		curColId = [curColumns objectAtIndex:i];
		dataCellsFont = [[curColId dataCell] font];
		if ( dataCellsFont == nil ) {
			// dataCellsFont = nil if headerCell is not a text-type cell
			// set column width to reasonable minimum
			cellWidthFitsAll = 10;
		} else {
			cellsSize = [[curColId headerCell] cellSize];
			cellWidthFitsAll = cellsSize.width;
		}
		
		// dataCell for all rows
		dataCellsFont = [[curColId dataCell] font];
		if ( dataCellsFont == nil ) {
			// dataCellsFont = nil if dataCell is not a text-type cell
			// leave column width as it is
		} else {
			attributes = [NSDictionary dictionaryWithObject:NSFontAttributeName
				forKey:[dataCellsFont fontName]];
			formatter = [[curColId dataCell] formatter];
			for(j=0;r>j && j<[self numberOfRows];j++) {
				if (formatter)
					valueWithFormat = [formatter 
stringForObjectValue:[datSo tableView:self 
objectValueForTableColumn:curColId row:j]];
				else valueWithFormat = [datSo tableView:self 
objectValueForTableColumn:curColId row:j];
/* PSQLQuery's tableView:objectValueForTableColumn:row: returns an 
NSCFString */
				cellsSize =[valueWithFormat sizeWithAttributes:attributes];
			}
			if ( cellsSize.width > cellWidthFitsAll ) {
				cellWidthFitsAll = cellsSize.width;
			}
		}
		
		// set column width
		[curColId setWidth: 
((cellWidthFitsAll+cellToCellSpacing.width+0)*1.2)];
		/* added 0 for a border. corrected with factor 1.2 for an 
undefined fault */
	}
	[self setNeedsDisplay:YES];
}
@end