/******************************************************************************
 * $Id$
 * 
 * Copyright (c) 2006-2012 Transmission authors and contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *****************************************************************************/

#import "StatusBarView.h"
#import "NSApplicationAdditions.h"
#import <QuartzCore/QuartzCore.h>

@interface StatusBarView (Private)

- (void) reload;

@end

@implementation StatusBarView

- (id) initWithFrame: (NSRect) rect
{
    if ((self = [super initWithFrame: rect]))
    {
        NSColor * lightColor = [NSColor colorWithCalibratedRed: 160.0/255.0 green: 160.0/255.0 blue: 160.0/255.0 alpha: 1.0];
        NSColor * darkColor = [NSColor colorWithCalibratedRed: 155.0/255.0 green: 155.0/255.0 blue: 155.0/255.0 alpha: 1.0];
        fGradient = [[NSGradient alloc] initWithStartingColor: lightColor endingColor: darkColor];
        
        //noise only for 10.7 + 
        if([NSApp isOnLionOrBetter])
        {
            CIFilter * randomFilter = [CIFilter filterWithName: @"CIRandomGenerator"];
            [randomFilter setDefaults];
            
            fNoiseImage = [randomFilter valueForKey: @"outputImage"];
            
            CIFilter * monochromeFilter = [CIFilter filterWithName: @"CIColorMonochrome"];
            [monochromeFilter setDefaults];
            [monochromeFilter setValue: fNoiseImage forKey: @"inputImage"];
            CIColor * monoFilterColor = [CIColor colorWithRed: 1.0 green: 1.0 blue: 1.0];
            [monochromeFilter setValue: monoFilterColor forKey: @"inputColor"];
            fNoiseImage = [[monochromeFilter valueForKey:@"outputImage"] retain];
        }
        else
            fNoiseImage = nil;
        
        [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(reload) name: NSWindowDidBecomeMainNotification object: [self window]];
        [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(reload) name: NSWindowDidResignMainNotification object: [self window]];
    }
    return self;
}

- (void) dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver: self];
    [fNoiseImage release];
    [fGradient release];
    [super dealloc];
}

- (BOOL) mouseDownCanMoveWindow
{
    return YES;
}

- (BOOL) isOpaque
{
    return YES;
}

- (void) drawRect: (NSRect) rect
{
    const BOOL active = [[self window] isMainWindow];
    
    NSInteger count = 0;
    NSRect gridRects[active ? 2 : 3];
    NSColor * colorRects[active ? 2 : 3];
    
    //bottom line
    NSRect lineBorderRect = NSMakeRect(NSMinX(rect), 0.0, NSWidth(rect), 1.0);
    NSRect intersectLineBorderRect = NSIntersectionRect(lineBorderRect, rect);
    if (!NSIsEmptyRect(intersectLineBorderRect))
    {
        gridRects[count] = intersectLineBorderRect;
        colorRects[count] = active ? [NSColor colorWithCalibratedWhite: 0.25 alpha: 1.0]
        : [NSColor colorWithCalibratedWhite: 0.5 alpha: 1.0];
        ++count;
        
        rect.origin.y += intersectLineBorderRect.size.height;
        rect.size.height -= intersectLineBorderRect.size.height;
    }
    
    
    //top line
    if (active)
    {
        lineBorderRect.origin.y = NSHeight([self bounds]) - 1.0;
        intersectLineBorderRect = NSIntersectionRect(lineBorderRect, rect);
        if (!NSIsEmptyRect(intersectLineBorderRect))
        {
            gridRects[count] = intersectLineBorderRect;
            colorRects[count] = [NSColor colorWithCalibratedWhite: 0.75 alpha: 1.0];
            ++count;
            
            rect.size.height -= intersectLineBorderRect.size.height;
        }
    }
    
    if (!NSIsEmptyRect(rect))
    {
        if (active)
        {
            const NSRect gradientRect = NSMakeRect(NSMinX(rect), 1.0, NSWidth(rect), NSHeight([self bounds]) - 1.0 - 1.0); //proper gradient requires the full height of the bar
            [fGradient drawInRect: gradientRect angle: 270.0];
        }
        else
        {
            gridRects[count] = rect;
            colorRects[count] = [NSColor colorWithCalibratedWhite: 0.85 alpha: 1.0];
            ++count;
        }
    }
    
    NSRectFillListWithColors(gridRects, colorRects, count);
    
    if (fNoiseImage) {
        NSAssert([NSApp isOnLionOrBetter], @"we have a noise image, but we're on 10.6"); //https://trac.transmissionbt.com/ticket/5053
        [fNoiseImage drawInRect: rect
                       fromRect: [self convertRectToBacking: rect]
                      operation: NSCompositeSourceOver
                       fraction: 0.12];
    }
}

@end

@implementation StatusBarView (Private)

- (void) reload
{
    [self setNeedsDisplay: YES];
}

@end