//
//  PSMTabBarControl.h
//  PSMTabBarControl
//
//  Created by John Pannell on 10/13/05.
//  Copyright 2005 Positive Spin Media. All rights reserved.
//

/*
   This view provides a control interface to manage a regular NSTabView.  It looks and works like the tabbed browsing interface of many popular browsers.
 */

#import <Cocoa/Cocoa.h>

#define PSMTabDragDidEndNotification		@ "PSMTabDragDidEndNotification"
#define PSMTabDragDidBeginNotification	@ "PSMTabDragDidBeginNotification"

#define kPSMTabBarControlHeight			22
// internal cell border
#define MARGIN_X								6
#define MARGIN_Y								3
// padding between objects
#define kPSMTabBarCellPadding				4
// fixed size objects
#define kPSMMinimumTitleWidth				30
#define kPSMTabBarIndicatorWidth			16.0
#define kPSMTabBarIconWidth					16.0
#define kPSMHideAnimationSteps				3.0

// Value used in _currentStep to indicate that resizing operation is not in progress
#define kPSMIsNotBeingResized				-1

// Value used in _currentStep when a resizing operation has just been started
#define kPSMStartResizeAnimation			0

@class PSMOverflowPopUpButton;
@class PSMRolloverButton;
@class PSMTabBarCell;
@class PSMTabBarController;
@protocol PSMTabStyle;

typedef enum {
	PSMTabBarHorizontalOrientation,
	PSMTabBarVerticalOrientation
} PSMTabBarOrientation;

typedef enum {
	PSMTabBarTearOffAlphaWindow,
	PSMTabBarTearOffMiniwindow
} PSMTabBarTearOffStyle;

enum {
	PSMTab_SelectedMask				= 1 << 1,
	PSMTab_LeftIsSelectedMask		= 1 << 2,
	PSMTab_RightIsSelectedMask		= 1 << 3,
	PSMTab_PositionLeftMask			= 1 << 4,
	PSMTab_PositionMiddleMask		= 1 << 5,
	PSMTab_PositionRightMask		= 1 << 6,
	PSMTab_PositionSingleMask		= 1 << 7,
};

@interface PSMTabBarControl : NSControl {
												
	// control basics
	NSMutableArray							*_cells;								// the cells that draw the tabs
	IBOutlet NSTabView						*tabView;								// the tab view being navigated
	PSMOverflowPopUpButton					*_overflowPopUpButton;				// for too many tabs
	PSMRolloverButton							*_addTabButton;
	PSMTabBarController						*_controller;

	// Spring-loading.
	NSTimer									*_springTimer;
	NSTabViewItem								*_tabViewItemWithSpring;

	// drawing style
	id<PSMTabStyle>							style;
	BOOL										_canCloseOnlyTab;
	BOOL										_disableTabClose;
	BOOL										_hideForSingleTab;
	BOOL										_showAddTabButton;
	BOOL										_sizeCellsToFit;
	BOOL										_useOverflowMenu;
	BOOL										_alwaysShowActiveTab;
	BOOL										_allowsScrubbing;
	NSInteger									_resizeAreaCompensation;
	PSMTabBarOrientation						_orientation;
	BOOL										_automaticallyAnimates;
	NSTimer									*_animationTimer;
	PSMTabBarTearOffStyle					_tearOffStyle;

	// behavior
	BOOL										_allowsBackgroundTabClosing;
	BOOL										_selectsTabsOnMouseDown;

	// vertical tab resizing
	BOOL										_allowsResizing;
	BOOL										_resizing;

	// cell width
	NSInteger									_cellMinWidth;
	NSInteger									_cellMaxWidth;
	NSInteger									_cellOptimumWidth;

	// animation for hide/show
	NSInteger									_currentStep;
	BOOL										_isHidden;
	IBOutlet id								partnerView;							// gets resized when hide/show
	BOOL										_awakenedFromNib;
	NSInteger									_tabBarWidth;
	NSTimer									*_showHideAnimationTimer;

	// drag and drop
	NSEvent									*_lastMouseDownEvent;				// keep this for dragging reference
	BOOL										_didDrag;
	BOOL										_closeClicked;

	// MVC help
	IBOutlet id								delegate;
}

// control characteristics
+ (NSBundle *)bundle;
- (CGFloat)availableCellWidth;
- (NSRect)genericCellRect;

// control configuration
- (PSMTabBarOrientation)orientation;
- (void)setOrientation:(PSMTabBarOrientation)value;
- (BOOL)canCloseOnlyTab;
- (void)setCanCloseOnlyTab:(BOOL)value;
- (BOOL)disableTabClose;
- (void)setDisableTabClose:(BOOL)value;
- (id<PSMTabStyle>)style;
- (void)setStyle:(id <PSMTabStyle>)newStyle;
- (NSString *)styleName;
- (void)setStyleNamed:(NSString *)name;
- (BOOL)hideForSingleTab;
- (void)setHideForSingleTab:(BOOL)value;
- (BOOL)showAddTabButton;
- (void)setShowAddTabButton:(BOOL)value;
- (NSInteger)cellMinWidth;
- (void)setCellMinWidth:(NSInteger)value;
- (NSInteger)cellMaxWidth;
- (void)setCellMaxWidth:(NSInteger)value;
- (NSInteger)cellOptimumWidth;
- (void)setCellOptimumWidth:(NSInteger)value;
- (BOOL)sizeCellsToFit;
- (void)setSizeCellsToFit:(BOOL)value;
- (BOOL)useOverflowMenu;
- (void)setUseOverflowMenu:(BOOL)value;
- (BOOL)allowsBackgroundTabClosing;
- (void)setAllowsBackgroundTabClosing:(BOOL)value;
- (BOOL)allowsResizing;
- (void)setAllowsResizing:(BOOL)value;
- (BOOL)selectsTabsOnMouseDown;
- (void)setSelectsTabsOnMouseDown:(BOOL)value;
- (BOOL)automaticallyAnimates;
- (void)setAutomaticallyAnimates:(BOOL)value;
- (BOOL)alwaysShowActiveTab;
- (void)setAlwaysShowActiveTab:(BOOL)value;
- (BOOL)allowsScrubbing;
- (void)setAllowsScrubbing:(BOOL)value;
- (PSMTabBarTearOffStyle)tearOffStyle;
- (void)setTearOffStyle:(PSMTabBarTearOffStyle)tearOffStyle;

// Factory for default style
+ (Class)defaultStyleClass;

// accessors
- (NSTabView *)tabView;
- (void)setTabView:(NSTabView *)view;
- (id)delegate;
- (void)setDelegate:(id)object;
- (id)partnerView;
- (void)setPartnerView:(id)view;

// the buttons
- (PSMRolloverButton *)addTabButton;
- (PSMOverflowPopUpButton *)overflowPopUpButton;

// tab information
- (NSMutableArray *)representedTabViewItems;
- (NSInteger)numberOfVisibleTabs;
- (PSMTabBarCell *)lastVisibleTab;

// special effects
- (void)hideTabBar:(BOOL) hide animate:(BOOL)animate;
- (BOOL)isTabBarHidden;
- (BOOL)isAnimating;

// internal bindings methods also used by the tab drag assistant
- (void)bindPropertiesForCell:(PSMTabBarCell *)cell andTabViewItem:(NSTabViewItem *)item;
- (void)removeTabForCell:(PSMTabBarCell *)cell;

@end


@interface NSObject (TabBarControlDelegateMethods)

//Standard NSTabView methods
- (BOOL)tabView:(NSTabView *)aTabView shouldCloseTabViewItem:(NSTabViewItem *)tabViewItem;
- (void)tabView:(NSTabView *)aTabView didCloseTabViewItem:(NSTabViewItem *)tabViewItem;

//"Spring-loaded" tabs methods
- (NSArray *)allowedDraggedTypesForTabView:(NSTabView *)aTabView;
- (void)tabView:(NSTabView *)aTabView acceptedDraggingInfo:(id <NSDraggingInfo>) draggingInfo onTabViewItem:(NSTabViewItem *)tabViewItem;

//Contextual menu method
- (NSMenu *)tabView:(NSTabView *)aTabView menuForTabViewItem:(NSTabViewItem *)tabViewItem;

//Drag and drop methods
- (BOOL)tabView:(NSTabView *)aTabView shouldDragTabViewItem:(NSTabViewItem *)tabViewItem fromTabBar:(PSMTabBarControl *)tabBarControl;
- (BOOL)tabView:(NSTabView *)aTabView shouldDropTabViewItem:(NSTabViewItem *)tabViewItem inTabBar:(PSMTabBarControl *)tabBarControl;
- (BOOL)tabView:(NSTabView *)aTabView shouldAllowTabViewItem:(NSTabViewItem *)tabViewItem toLeaveTabBar:(PSMTabBarControl *)tabBarControl;
- (void)tabView:(NSTabView*)aTabView didDropTabViewItem:(NSTabViewItem *)tabViewItem inTabBar:(PSMTabBarControl *)tabBarControl;


//Tear-off tabs methods
- (NSImage *)tabView:(NSTabView *)aTabView imageForTabViewItem:(NSTabViewItem *)tabViewItem offset:(NSSize *)offset styleMask:(NSUInteger *)styleMask;
- (PSMTabBarControl *)tabView:(NSTabView *)aTabView newTabBarForDraggedTabViewItem:(NSTabViewItem *)tabViewItem atPoint:(NSPoint)point;
- (void)tabView:(NSTabView *)aTabView closeWindowForLastTabViewItem:(NSTabViewItem *)tabViewItem;

//Overflow menu validation
- (BOOL)tabView:(NSTabView *)aTabView validateOverflowMenuItem:(NSMenuItem *)menuItem forTabViewItem:(NSTabViewItem *)tabViewItem;
- (void)tabView:(NSTabView *)aTabView tabViewItem:(NSTabViewItem *)tabViewItem isInOverflowMenu:(BOOL)inOverflowMenu;

//tab bar hiding methods
- (void)tabView:(NSTabView *)aTabView tabBarDidHide:(PSMTabBarControl *)tabBarControl;
- (void)tabView:(NSTabView *)aTabView tabBarDidUnhide:(PSMTabBarControl *)tabBarControl;
- (CGFloat)desiredWidthForVerticalTabBar:(PSMTabBarControl *)tabBarControl;

//closing
- (BOOL)tabView:(NSTabView *)aTabView disableTabCloseForTabViewItem:(NSTabViewItem *)tabViewItem;

//tooltips
- (NSString *)tabView:(NSTabView *)aTabView toolTipForTabViewItem:(NSTabViewItem *)tabViewItem;

//accessibility
- (NSString *)accessibilityStringForTabView:(NSTabView *)aTabView objectCount:(NSInteger)objectCount;

@end