Source/BSLineNumberView.m

   1 /*
   2  * MacGDBp
   3  * Copyright (c) 2007 - 2008, Blue Static <http://www.bluestatic.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
   6  * General Public License as published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
  10  * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with this program; if not,
  14  * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  15  */
  16
  17 #import "BSLineNumberView.h"
  18
  19
  20 @implementation BSLineNumberView
  21
  22 @synthesize sourceView;
  23
  24 /**
  25  * Initializer for the line number view
  26  */
  27 - (id)initWithFrame:(NSRect)frame
  28 {
  29         if (self = [super initWithFrame:frame])
  30         {
  31
  32         }
  33         return self;
  34 }
  35
  36 /**
  37  * Flip the coordinates
  38  */
  39 - (BOOL)isFlipped
  40 {
  41         return YES;
  42 }
  43
  44 /**
  45  * Draws the line numbers whenever necessary
  46  */
  47 - (void)drawRect:(NSRect)rect
  48 {
  49         // background color
  50         [[NSColor colorWithDeviceRed:0.871 green:0.871 blue:0.871 alpha:1] set];
  51         [NSBezierPath fillRect:rect];
  52
  53         // font attributes for the line number
  54         NSDictionary *attrs = [NSDictionary dictionaryWithObjectsAndKeys:[NSFont fontWithName:@"Monaco" size:10.0], NSFontAttributeName, [NSColor grayColor], NSForegroundColorAttributeName, nil];
  55
  56         unsigned i = 0, line = 1;
  57         while (i < [[[sourceView textView] layoutManager] numberOfGlyphs])
  58         {
  59                 NSRange fragRange;
  60                 NSRect fragRect = [self convertRect:[[[sourceView textView] layoutManager] lineFragmentRectForGlyphAtIndex:i effectiveRange:&fragRange] fromView:[sourceView textView]];
  61                 fragRect.origin.x = rect.origin.x; // horizontal scrolling matters not
  62
  63                 // we want to paint the top and bottom line number even if they're cut off
  64                 NSRect testRect = rect;
  65                 testRect.origin.y -= fragRect.size.height - 1;
  66                 testRect.size.height += fragRect.size.height - 1;
  67                 if (NSPointInRect(fragRect.origin, testRect))
  68                 {
  69                         NSString *num = [NSString stringWithFormat:@"%u", line];
  70                         NSSize strSize = [num sizeWithAttributes:attrs];
  71                         [num drawAtPoint:NSMakePoint([self frame].size.width - strSize.width - 3, fragRect.origin.y) withAttributes:attrs];
  72                 }
  73
  74                 i += fragRange.length;
  75                 line++;
  76         }
  77 }
  78
  79 @end