/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Jeff Dlouhy.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*   Jeff Dlouhy <Jeff.Dlouhy@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
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* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */

#import "ThumbnailView.h"

#import <Carbon/Carbon.h>

static const int kShadowX = 0;
static const int kShadowY = -3;
static const int kShadowRadius = 5;
static const int kShadowPadding = 5;
static const int kThumbnailTitleHeight = 20;

@interface ThumbnailView (Private)
// Causes the browser to select the tab corresponding to this thumbnail.
- (void)selectTab;
@end


@implementation ThumbnailView

- (id)initWithFrame:(NSRect)frame {
  if ((self = [super initWithFrame:frame])) {
    mThumbnail = nil;
    mTitleCell = [[NSCell alloc] initTextCell:@""];
    [mTitleCell setLineBreakMode:NSLineBreakByTruncatingTail];
    [mTitleCell setAlignment:NSCenterTextAlignment];
  }

  return self;
}

- (void)setThumbnail:(NSImage*)image
{
  if (image != mThumbnail) {
    [mThumbnail release];
    mThumbnail = [image retain];
    [self setNeedsDisplay:YES];
  }
}

- (void)setTitle:(NSString*)title
{
  [mTitleCell setTitle:title];
  [self setToolTip:title];
}

- (void)setRepresentedObject:(id)object
{
  if (mRepresentedObject != object) {
    [mRepresentedObject release];
    mRepresentedObject = [object retain];
  }
}

- (id)representedObject;
{
  return mRepresentedObject;
}

- (void)setDelegate:(id)delegate
{
  mDelegate = delegate;
}

- (id)delegate
{ 
  return mDelegate;
}

- (BOOL)acceptsFirstResponder
{
  return YES;
}

- (BOOL)becomeFirstResponder
{
  [self setNeedsDisplay:YES];
  return YES;
}

- (BOOL)resignFirstResponder
{
  [self setNeedsDisplay:YES];
  return YES;
}

- (void)drawRect:(NSRect)rect
{
  NSShadow* shadow = [[[NSShadow alloc] init] autorelease];
  [shadow setShadowOffset:NSMakeSize(kShadowX, kShadowY)];
  [shadow setShadowBlurRadius:kShadowRadius];
  [shadow set];

  NSRect thumbnailImageRect;
  NSRect thumbnailTitleRect;
  NSDivideRect([self bounds], &thumbnailTitleRect, &thumbnailImageRect, kThumbnailTitleHeight, NSMinYEdge);

  if (mThumbnail) {
    [[NSGraphicsContext currentContext] setImageInterpolation:NSImageInterpolationHigh];
    [mThumbnail setScalesWhenResized:YES];
    // Adjust the target drawing area as necessary to preserve aspect ratio.
    float xScaleFactor = thumbnailImageRect.size.width / [mThumbnail size].width;
    float yScaleFactor = thumbnailImageRect.size.height / [mThumbnail size].height;
    if (xScaleFactor < yScaleFactor) {
      thumbnailImageRect.size.height = [mThumbnail size].height * xScaleFactor;
    }
    else {
      thumbnailImageRect.size.width = [mThumbnail size].width * yScaleFactor;
      thumbnailImageRect.origin.x = ([self bounds].size.width - thumbnailImageRect.size.width) / 2.0;
    }

    NSRect insetRect = NSInsetRect(thumbnailImageRect, kShadowPadding, kShadowPadding);
    [mThumbnail drawInRect:insetRect
                  fromRect:NSZeroRect
                 operation:NSCompositeSourceOver
                  fraction:1];
    if ([[self window] firstResponder] == self) {
      CGRect focusRect = CGRectMake(insetRect.origin.x, insetRect.origin.y,
                                    insetRect.size.width, insetRect.size.height);
      HIThemeDrawFocusRect(&focusRect, true,
                           [[NSGraphicsContext currentContext] graphicsPort],
                           kHIThemeOrientationNormal);
    }
  }

  if (mTitleCell)
    [mTitleCell drawWithFrame:thumbnailTitleRect inView:self];
}

- (void)mouseUp:(NSEvent*)theEvent
{
  NSPoint location = [self convertPoint:[theEvent locationInWindow]
                               fromView:nil];
  if (NSPointInRect(location, [self bounds]))
    [self selectTab];
}

- (void)keyDown:(NSEvent*)theEvent
{
  if (([theEvent modifierFlags] & NSDeviceIndependentModifierFlagsMask) == 0 &&
      [[theEvent charactersIgnoringModifiers] isEqualToString:@" "]) {
    [self selectTab];
    return;
  }
  [super keyDown:theEvent];
}

- (void)selectTab
{
  if ([mDelegate respondsToSelector:@selector(thumbnailViewWasSelected:)])
    [mDelegate thumbnailViewWasSelected:self];
}

- (void)dealloc
{
  [mThumbnail release];
  [mTitleCell release];
  [mRepresentedObject release];
  [super dealloc];
}

@end
