Source/BSLineNumberRulerView.mm

   1 /*
   2  * MacGDBp
   3  * Copyright (c) 2007 - 2011, 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 "BSLineNumberRulerView.h"
  18
  19 @interface BSLineNumberRulerView (Private)
  20 - (void)computeLineIndex;
  21 @end
  22
  23
  24 @implementation BSLineNumberRulerView
  25
  26 - (id)initWithScrollView:(NSScrollView*)scrollView
  27 {
  28   if (self = [super initWithScrollView:scrollView orientation:NSVerticalRuler]) {
  29     [self setClientView:[scrollView documentView]];
  30   }
  31   return self;
  32 }
  33
  34 - (void)awakeFromNib
  35 {
  36   [self setClientView:[[self scrollView] documentView]];
  37 }
  38
  39 - (void)drawHashMarksAndLabelsInRect:(NSRect)rect
  40 {
  41   // Draw the background color.
  42   [[NSColor colorWithDeviceRed:0.871 green:0.871 blue:0.871 alpha:1] set];
  43   [NSBezierPath fillRect:rect];
  44
  45   // Draw the right stroke.
  46   [[NSColor grayColor] setStroke];
  47   [NSBezierPath strokeLineFromPoint:NSMakePoint(NSMaxX(rect), NSMinY(rect))
  48                             toPoint:NSMakePoint(NSMaxX(rect), NSMaxY(rect))];
  49 }
  50
  51 - (void)performLayout
  52 {
  53   [self computeLineIndex];
  54 }
  55
  56 // Private /////////////////////////////////////////////////////////////////////
  57
  58 /**
  59  * Iterates over the text storage system and computes a map of line numbers to
  60  * first character index for a line's frame rectangle.
  61  */
  62 - (void)computeLineIndex
  63 {
  64   lineIndex_.clear();
  65
  66   NSView* view = [self clientView];
  67   if (![view isKindOfClass:[NSTextView class]])
  68     return;
  69
  70   NSString* text = [(NSTextView*)view string];
  71   NSUInteger stringLength = [text length];
  72   NSUInteger index = 0;
  73
  74   while (index < stringLength) {
  75     lineIndex_.push_back(index);
  76     index = NSMaxRange([text lineRangeForRange:NSMakeRange(index, 0)]);
  77   }
  78
  79   NSUInteger lineEnd, contentEnd;
  80   [text getLineStart:NULL
  81                  end:&lineEnd
  82          contentsEnd:&contentEnd
  83             forRange:NSMakeRange(lineIndex_.back(), 0)];
  84   if (contentEnd < lineEnd)
  85     lineIndex_.push_back(index);
  86
  87   NSLog(@"line count = %d", lineIndex_.size());
  88 }
  89
  90 @end