/*
 * MacGDBp
 * Copyright (c) 2007 - 2011, Blue Static <http://www.bluestatic.org>
 * 
 * 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.
 * 
 * You should have received a copy of the GNU General Public License along with this program; if not, 
 * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */

#import "BSLineNumberView.h"
#import "Breakpoint.h"
#import "BSSourceView.h"

@interface BSLineNumberView (Private)
- (void)drawMarkerInRect:(NSRect)rect;
@end

@implementation BSLineNumberView

@synthesize sourceView, lineNumberRange, markers;

/**
 * Initializer for the line number view
 */
- (id)initWithFrame:(NSRect)frame
{
  if (self = [super initWithFrame:frame])
  {
    lineNumberRange = NSMakeRange(0, 0);
  }
  return self;
}

/**
 * Flip the coordinates
 */
- (BOOL)isFlipped
{
  return YES;
}

/**
 * Draws the line numbers whenever necessary
 */
- (void)drawRect:(NSRect)rect
{
  // background color
  [[NSColor colorWithDeviceRed:0.871 green:0.871 blue:0.871 alpha:1] set];
  [NSBezierPath fillRect:rect];
  
  [[NSColor blackColor] set];
  [NSBezierPath strokeLineFromPoint:NSMakePoint(rect.origin.x, rect.origin.y) toPoint:NSMakePoint(rect.origin.x + rect.size.width, rect.origin.y)];
  
  [[NSColor grayColor] set];
  [NSBezierPath strokeLineFromPoint:NSMakePoint(rect.origin.x, rect.size.height) toPoint:NSMakePoint(rect.origin.x + rect.size.width, rect.size.height)];
  
  // font attributes for the line number
  NSDictionary* attrs = [NSDictionary dictionaryWithObjectsAndKeys:[NSFont fontWithName:@"Monaco" size:9.0], NSFontAttributeName, [NSColor grayColor], NSForegroundColorAttributeName, nil];
  
  lineNumberRange = NSMakeRange(0, 0);
  
  unsigned i = 0, line = 1;
  while (i < [[[sourceView textView] layoutManager] numberOfGlyphs])
  {
    NSRange fragRange;
    NSRect fragRect = [self convertRect:[[[sourceView textView] layoutManager] lineFragmentRectForGlyphAtIndex:i effectiveRange:&fragRange] fromView:[sourceView textView]];
    fragRect.origin.x = rect.origin.x; // horizontal scrolling matters not
    fragRect.size.width = [self bounds].size.width;
    
    // we want to paint the top and bottom line number even if they're cut off
    NSRect testRect = rect;
    testRect.origin.y -= fragRect.size.height - 1;
    testRect.size.height += fragRect.size.height - 1;
    if (NSPointInRect(fragRect.origin, testRect))
    {
      lineNumberRange.location = (lineNumberRange.length == 0 ? line : lineNumberRange.location);
      lineNumberRange.length++;
      NSString* num = [NSString stringWithFormat:@"%u", line];
      NSSize strSize = [num sizeWithAttributes:attrs];
      [num drawAtPoint:NSMakePoint([self frame].size.width - strSize.width - 3, fragRect.origin.y + ((fragRect.size.height - strSize.height) / 2)) withAttributes:attrs];
      Breakpoint* test = [[Breakpoint alloc] initWithLine:line inFile:[sourceView file]];
      if ([markers containsObject:test])
      {
        [self drawMarkerInRect:fragRect];
      }
      [test release];
    }
    
    i += fragRange.length;
    line++;
  }
}

/**
 * Handles the mouse down event (which is adding, deleting, and toggling breakpoints)
 */
- (void)mouseDown:(NSEvent*)event
{
  NSTextView* textView = [sourceView textView];
  
  NSPoint clickLoc = [self convertPoint:[event locationInWindow] fromView:nil];
  
  unsigned line = 1;
  unsigned i = 0;
  while (i < [[textView layoutManager] numberOfGlyphs])
  {
    NSRange fragRange;
    NSRect fragRect = [[textView layoutManager] lineFragmentRectForGlyphAtIndex:i effectiveRange:&fragRange];
    fragRect.size.width = [self bounds].size.width;
    if (NSPointInRect(clickLoc, fragRect))
    {
      [[sourceView delegate] gutterClickedAtLine:(line + lineNumberRange.location - 1) forFile:[sourceView file]];
      return;
    }
    
    i += fragRange.length;
    line++;
  }
}

#pragma mark Private

/**
 * Draws a marker in a given rectangle
 */
- (void)drawMarkerInRect:(NSRect)rect
{
  NSBezierPath* path = [NSBezierPath bezierPath];
  
  [path moveToPoint:NSMakePoint(rect.origin.x + 2, rect.origin.y + 2)]; // initial origin
  [path lineToPoint:NSMakePoint(rect.size.width - 7, rect.origin.y + 2)]; // upper right
  [path lineToPoint:NSMakePoint(rect.size.width - 2, rect.origin.y + (rect.size.height / 2))]; // point
  [path lineToPoint:NSMakePoint(rect.size.width - 7, rect.origin.y + rect.size.height - 2)]; // lower right
  [path lineToPoint:NSMakePoint(rect.origin.x + 2, rect.origin.y + rect.size.height - 2)]; // lower left
  [path lineToPoint:NSMakePoint(rect.origin.x + 2, rect.origin.y + 1)]; // upper left
  
  [[NSColor colorWithDeviceRed:0.004 green:0.557 blue:0.851 alpha:1.0] set];
  [path fill];
  
  [[NSColor colorWithDeviceRed:0.0 green:0.404 blue:0.804 alpha:1.0] set];
  [path setLineWidth:2];
  [path stroke];
}

@end