/*****************************************************************************
 * MainWindowTitle.m: MacOS X interface module
 *****************************************************************************
 * Copyright (C) 2011-2012 Felix Paul Kühne
 * $Id$
 *
 * Authors: Felix Paul Kühne <fkuehne -at- videolan -dot- 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 <vlc_common.h>
#import "intf.h"
#import "MainWindowTitle.h"
#import "CoreInteraction.h"
#import "CompatibilityFixes.h"

/*****************************************************************************
 * VLCMainWindowTitleView
 *
 * this is our title bar, which can do anything a title should do
 * it relies on the VLCWindowButtonCell to display the correct traffic light
 * states, since we can't capture the mouse-moved events here correctly
 *****************************************************************************/

@implementation VLCMainWindowTitleView
- (id)init
{
    o_window_title_attributes_dict = [[NSDictionary dictionaryWithObjectsAndKeys: [NSColor whiteColor], NSForegroundColorAttributeName, [NSFont titleBarFontOfSize:12.0], NSFontAttributeName, nil] retain];

    return [super init];
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver: self];

    [o_red_img release];
    [o_red_over_img release];
    [o_red_on_img release];
    [o_yellow_img release];
    [o_yellow_over_img release];
    [o_yellow_on_img release];
    [o_green_img release];
    [o_green_over_img release];
    [o_green_on_img release];

    [o_window_title_shadow release];
    [o_window_title_attributes_dict release];

    [super dealloc];
}

- (void)awakeFromNib
{
    [self setAutoresizesSubviews: YES];
    [self setImagesLeft:[NSImage imageNamed:@"topbar-dark-left"] middle: [NSImage imageNamed:@"topbar-dark-center-fill"] right:[NSImage imageNamed:@"topbar-dark-right"]];

    [self loadButtonIcons];
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(controlTintChanged:) name: NSControlTintDidChangeNotification object: nil];

    [o_red_btn setImage: o_red_img];
    [o_red_btn setAlternateImage: o_red_on_img];
    [[o_red_btn cell] setShowsBorderOnlyWhileMouseInside: YES];
    [[o_red_btn cell] setTag: 0];
    [o_yellow_btn setImage: o_yellow_img];
    [o_yellow_btn setAlternateImage: o_yellow_on_img];
    [[o_yellow_btn cell] setShowsBorderOnlyWhileMouseInside: YES];
    [[o_yellow_btn cell] setTag: 1];
    [o_green_btn setImage: o_green_img];
    [o_green_btn setAlternateImage: o_green_on_img];
    [[o_green_btn cell] setShowsBorderOnlyWhileMouseInside: YES];
    [[o_green_btn cell] setTag: 2];
    [o_fullscreen_btn setImage: [NSImage imageNamed:@"window-fullscreen"]];
    [o_fullscreen_btn setAlternateImage: [NSImage imageNamed:@"window-fullscreen-on"]];
    [[o_fullscreen_btn cell] setShowsBorderOnlyWhileMouseInside: YES];
    [[o_fullscreen_btn cell] setTag: 3];
}

- (void)controlTintChanged:(NSNotification *)notification
{
    [o_red_img release];
    [o_red_over_img release];
    [o_red_on_img release];
    [o_yellow_img release];
    [o_yellow_over_img release];
    [o_yellow_on_img release];
    [o_green_img release];
    [o_green_over_img release];
    [o_green_on_img release];

    [self loadButtonIcons];

    [o_red_btn setNeedsDisplay];
    [o_yellow_btn setNeedsDisplay];
    [o_green_btn setNeedsDisplay];
}

- (void)loadButtonIcons
{
    if (OSX_LION)
    {
        if( [NSColor currentControlTint] == NSBlueControlTint )
        {
            o_red_img = [[NSImage imageNamed:@"lion-window-close"] retain];
            o_red_over_img = [[NSImage imageNamed:@"lion-window-close-over"] retain];
            o_red_on_img = [[NSImage imageNamed:@"lion-window-close-on"] retain];
            o_yellow_img = [[NSImage imageNamed:@"lion-window-minimize"] retain];
            o_yellow_over_img = [[NSImage imageNamed:@"lion-window-minimize-over"] retain];
            o_yellow_on_img = [[NSImage imageNamed:@"lion-window-minimize-on"] retain];
            o_green_img = [[NSImage imageNamed:@"lion-window-zoom"] retain];
            o_green_over_img = [[NSImage imageNamed:@"lion-window-zoom-over"] retain];
            o_green_on_img = [[NSImage imageNamed:@"lion-window-zoom-on"] retain];
        } else {
            o_red_img = [[NSImage imageNamed:@"lion-window-close-graphite"] retain];
            o_red_over_img = [[NSImage imageNamed:@"lion-window-close-over-graphite"] retain];
            o_red_on_img = [[NSImage imageNamed:@"lion-window-close-on-graphite"] retain];
            o_yellow_img = [[NSImage imageNamed:@"lion-window-minimize-graphite"] retain];
            o_yellow_over_img = [[NSImage imageNamed:@"lion-window-minimize-over-graphite"] retain];
            o_yellow_on_img = [[NSImage imageNamed:@"lion-window-minimize-on-graphite"] retain];
            o_green_img = [[NSImage imageNamed:@"lion-window-zoom-graphite"] retain];
            o_green_over_img = [[NSImage imageNamed:@"lion-window-zoom-over-graphite"] retain];
            o_green_on_img = [[NSImage imageNamed:@"lion-window-zoom-on-graphite"] retain];
        }
    } else {
        if( [NSColor currentControlTint] == NSBlueControlTint )
        {
            o_red_img = [[NSImage imageNamed:@"snowleo-window-close"] retain];
            o_red_over_img = [[NSImage imageNamed:@"snowleo-window-close-over"] retain];
            o_red_on_img = [[NSImage imageNamed:@"snowleo-window-close-on"] retain];
            o_yellow_img = [[NSImage imageNamed:@"snowleo-window-minimize"] retain];
            o_yellow_over_img = [[NSImage imageNamed:@"snowleo-window-minimize-over"] retain];
            o_yellow_on_img = [[NSImage imageNamed:@"snowleo-window-minimize-on"] retain];
            o_green_img = [[NSImage imageNamed:@"snowleo-window-zoom"] retain];
            o_green_over_img = [[NSImage imageNamed:@"snowleo-window-zoom-over"] retain];
            o_green_on_img = [[NSImage imageNamed:@"snowleo-window-zoom-on"] retain];
        } else {
            o_red_img = [[NSImage imageNamed:@"snowleo-window-close-graphite"] retain];
            o_red_over_img = [[NSImage imageNamed:@"snowleo-window-close-over-graphite"] retain];
            o_red_on_img = [[NSImage imageNamed:@"snowleo-window-close-on-graphite"] retain];
            o_yellow_img = [[NSImage imageNamed:@"snowleo-window-minimize-graphite"] retain];
            o_yellow_over_img = [[NSImage imageNamed:@"snowleo-window-minimize-over-graphite"] retain];
            o_yellow_on_img = [[NSImage imageNamed:@"snowleo-window-minimize-on-graphite"] retain];
            o_green_img = [[NSImage imageNamed:@"snowleo-window-zoom-graphite"] retain];
            o_green_over_img = [[NSImage imageNamed:@"snowleo-window-zoom-over-graphite"] retain];
            o_green_on_img = [[NSImage imageNamed:@"snowleo-window-zoom-on-graphite"] retain];
        }
    }
}

- (BOOL)mouseDownCanMoveWindow
{
    return YES;
}

- (IBAction)buttonAction:(id)sender
{
    if (sender == o_red_btn)
        [[self window] performClose: sender];
    else if (sender == o_yellow_btn)
        [[self window] miniaturize: sender];
    else if (sender == o_green_btn)
        [[self window] performZoom: sender];
    else if (sender == o_fullscreen_btn)
    {
        // set fs directly to true, as the vars can be already true in some configs
        var_SetBool( pl_Get( VLCIntf ), "fullscreen", true );

        vout_thread_t *p_vout = getVout();
        if( p_vout )
        {
            var_SetBool( p_vout, "fullscreen", true );
            vlc_object_release( p_vout );
        }
    }
    else
        msg_Err( VLCIntf, "unknown button action sender" );

    [self setWindowButtonOver: NO];
    [self setWindowFullscreenButtonOver: NO];
}

- (void)setWindowTitle:(NSString *)title
{
    if (!o_window_title_shadow)
    {
        o_window_title_shadow = [[NSShadow alloc] init];
        [o_window_title_shadow setShadowColor:[NSColor colorWithCalibratedWhite:1.0 alpha:0.5]];
        [o_window_title_shadow setShadowOffset:NSMakeSize(0.0, -1.5)];
        [o_window_title_shadow setShadowBlurRadius:0.5];
        [o_window_title_shadow retain];
    }

    NSMutableAttributedString *o_attributed_title = [[NSMutableAttributedString alloc] initWithString:title attributes: o_window_title_attributes_dict];
    NSUInteger i_titleLength = [title length];

    [o_attributed_title addAttribute:NSShadowAttributeName value:o_window_title_shadow range:NSMakeRange(0, i_titleLength)];
    [o_attributed_title setAlignment: NSCenterTextAlignment range:NSMakeRange(0, i_titleLength)];
    [o_title_lbl setAttributedStringValue:o_attributed_title];
    [o_attributed_title release];
}

- (void)setFullscreenButtonHidden:(BOOL)b_value
{
    [o_fullscreen_btn setHidden: b_value];
}

- (void)setWindowButtonOver:(BOOL)b_value
{
    if( b_value )
    {
        [o_red_btn setImage: o_red_over_img];
        [o_yellow_btn setImage: o_yellow_over_img];
        [o_green_btn setImage: o_green_over_img];
    }
    else
    {
        [o_red_btn setImage: o_red_img];
        [o_yellow_btn setImage: o_yellow_img];
        [o_green_btn setImage: o_green_img];
    }
}

- (void)setWindowFullscreenButtonOver:(BOOL)b_value
{
    if (b_value)
        [o_fullscreen_btn setImage: [NSImage imageNamed:@"window-fullscreen-over"]];
    else
        [o_fullscreen_btn setImage: [NSImage imageNamed:@"window-fullscreen"]];
}
@end

/*****************************************************************************
 * VLCWindowButtonCell
 *
 * since the title bar cannot fetch these mouse events (the more top-level
 * NSButton is unable fetch them as well), we are using a subclass of the
 * button cell to do so. It's set in the nib for the respective objects.
 *****************************************************************************/

@implementation VLCWindowButtonCell

- (void)mouseEntered:(NSEvent *)theEvent
{
    if ([self tag] == 3)
        [(VLCMainWindowTitleView *)[[self controlView] superview] setWindowFullscreenButtonOver: YES];
    else
        [(VLCMainWindowTitleView *)[[self controlView] superview] setWindowButtonOver: YES];
}

- (void)mouseExited:(NSEvent *)theEvent
{
    if ([self tag] == 3)
        [(VLCMainWindowTitleView *)[[self controlView] superview] setWindowFullscreenButtonOver: NO];
    else
        [(VLCMainWindowTitleView *)[[self controlView] superview] setWindowButtonOver: NO];
}

/* accessibility stuff */
- (NSArray*)accessibilityAttributeNames {
    NSArray *theAttributeNames = [super accessibilityAttributeNames];
    id theControlView = [self controlView];
    return ([theControlView respondsToSelector: @selector(extendedAccessibilityAttributeNames:)] ? [theControlView extendedAccessibilityAttributeNames: theAttributeNames] : theAttributeNames); // ask the cell's control view (i.e., the button) for additional attribute values
}

- (id)accessibilityAttributeValue: (NSString*)theAttributeName {
    id theControlView = [self controlView];
    if ([theControlView respondsToSelector: @selector(extendedAccessibilityAttributeValue:)]) {
        id theValue = [theControlView extendedAccessibilityAttributeValue: theAttributeName];
        if (theValue) {
            return theValue; // if this is an extended attribute value we added, return that -- otherwise, fall back to super's implementation
        }
    }
    return [super accessibilityAttributeValue: theAttributeName];
}

- (BOOL)accessibilityIsAttributeSettable: (NSString*)theAttributeName {
    id theControlView = [self controlView];
    if ([theControlView respondsToSelector: @selector(extendedAccessibilityIsAttributeSettable:)]) {
        NSNumber *theValue = [theControlView extendedAccessibilityIsAttributeSettable: theAttributeName];
        if (theValue) {
            return [theValue boolValue]; // same basic strategy we use in -accessibilityAttributeValue:
        }
    }
    return [super accessibilityIsAttributeSettable: theAttributeName];
}

@end


/*****************************************************************************
 * VLCResizeControl
 *
 * For Leopard and Snow Leopard, we need to emulate the resize control on the
 * bottom right of the window, since it is gone by using the borderless window
 * mask. A proper fix would be Lion-only.
 *****************************************************************************/

@implementation VLCResizeControl

- (void)mouseDown:(NSEvent *)theEvent {
    BOOL keepOn = YES;

    while (keepOn) {
        theEvent = [[self window] nextEventMatchingMask: NSLeftMouseUpMask |
                    NSLeftMouseDraggedMask];

        switch ([theEvent type]) {
            case NSLeftMouseDragged:
            {
                NSRect windowFrame = [[self window] frame];
                CGFloat deltaX, deltaY, oldOriginY;
                deltaX = [theEvent deltaX];
                deltaY = [theEvent deltaY];
                oldOriginY = windowFrame.origin.y;

                windowFrame.origin.y = (oldOriginY + windowFrame.size.height) - (windowFrame.size.height + deltaY);
                windowFrame.size.width += deltaX;
                windowFrame.size.height += deltaY;

                NSSize winMinSize = [self window].minSize;
                if (windowFrame.size.width < winMinSize.width)
                    windowFrame.size.width = winMinSize.width;

                if (windowFrame.size.height < winMinSize.height)
                {
                    windowFrame.size.height = winMinSize.height;
                    windowFrame.origin.y = oldOriginY;
                }

                [[self window] setFrame: windowFrame display: YES animate: NO];
                break;
            }
                break;
            case NSLeftMouseUp:
                keepOn = NO;
                break;
            default:
                /* Ignore any other kind of event. */
                break;
        }

    };

    return;
}

@end

/*****************************************************************************
 * VLCColorView
 *
 * since we are using a clear window color when using the black window
 * style, some filling is needed behind the video and some other elements
 *****************************************************************************/

@implementation VLCColorView

- (void)drawRect:(NSRect)rect {
    [[NSColor blackColor] setFill];
    NSRectFill(rect);
}

@end

/*****************************************************************************
 * custom window buttons to support the accessibility stuff
 *****************************************************************************/

@implementation VLCCustomWindowButtonPrototype
+ (Class)cellClass {
    return [VLCWindowButtonCell class];
}

- (NSArray*)extendedAccessibilityAttributeNames: (NSArray*)theAttributeNames {
    return ([theAttributeNames containsObject: NSAccessibilitySubroleAttribute] ? theAttributeNames : [theAttributeNames arrayByAddingObject: NSAccessibilitySubroleAttribute]); // run-of-the-mill button cells don't usually have a Subrole attribute, so we add that attribute
}

- (id)extendedAccessibilityAttributeValue: (NSString*)theAttributeName {
    return nil;
}

- (NSNumber*)extendedAccessibilityIsAttributeSettable: (NSString*)theAttributeName {
    return ([theAttributeName isEqualToString: NSAccessibilitySubroleAttribute] ? [NSNumber numberWithBool: NO] : nil); // make the Subrole attribute we added non-settable
}

- (void)accessibilityPerformAction: (NSString*)theActionName {
    if ([theActionName isEqualToString: NSAccessibilityPressAction]) {
        if ([self isEnabled]) {
            [self performClick: nil];
        }
    } else {
        [super accessibilityPerformAction: theActionName];
    }
}

@end

@implementation VLCCustomWindowCloseButton
- (id)extendedAccessibilityAttributeValue: (NSString*)theAttributeName {
    return ([theAttributeName isEqualToString: NSAccessibilitySubroleAttribute] ? NSAccessibilityCloseButtonAttribute : nil);
}

@end


@implementation VLCCustomWindowMinimizeButton
- (id)extendedAccessibilityAttributeValue: (NSString*)theAttributeName {
    return ([theAttributeName isEqualToString: NSAccessibilitySubroleAttribute] ? NSAccessibilityMinimizeButtonAttribute : nil);
}

@end


@implementation VLCCustomWindowZoomButton
- (id)extendedAccessibilityAttributeValue: (NSString*)theAttributeName {
    return ([theAttributeName isEqualToString: NSAccessibilitySubroleAttribute] ? NSAccessibilityZoomButtonAttribute : nil);
}

@end


@implementation VLCCustomWindowFullscreenButton
#ifdef MAC_OS_X_VERSION_10_7
- (id)extendedAccessibilityAttributeValue: (NSString*)theAttributeName {
    return ([theAttributeName isEqualToString: NSAccessibilitySubroleAttribute] ? NSAccessibilityFullScreenButtonAttribute : nil);
}
#endif

@end