/*

 Copyright (C) 2018 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 View controller containing the lower UI controls and the embedded child view controller (split view controller).

 */

#import "PrimaryViewController.h"

#import "IconViewController.h"

#import "BaseNode.h"

// notification to instruct MyOutlineViewController to add a folder

NSString *kAddFolderNotification = @"AddFolderNotification";

// notification to instruct MyOutlineViewController to remove a folder

NSString *kRemoveFolderNotification = @"RemoveFolderNotification";

// notification to instruct MyOutlineViewController to add a bookmark

NSString *kAddBookmarkNotification = @"AddBookmarkNotification";

// notification to instruct MyOutlineViewController to edit a bookmark

NSString *kEditBookmarkNotification = @"EditBookmarkNotification";

@interface PrimaryViewController ()

@property (nonatomic, weak) IBOutlet NSProgressIndicator *progIndicator;

@property (nonatomic, weak) IBOutlet NSButton *removeButton;

@property (nonatomic, weak) IBOutlet NSPopUpButton *actionButton;

@property (nonatomic, weak) IBOutlet NSTextField *urlField;

@property (nonatomic, strong) IBOutlet NSMenuItem *editBookmarkMenuItem;

@end

#pragma mark -

@implementation PrimaryViewController

// -------------------------------------------------------------------------------

//  viewDidLoad

// -------------------------------------------------------------------------------

- (void)viewDidLoad

{

    // Note: we keep the left split view item from growing as the window grows by setting its hugging priority to 200,

    // and the right to 199. The view with the lowest priority will be the first to take on additional width if the

    // split view grows or shrinks.

    //

    [super viewDidLoad];

    // insert an empty menu item at the beginning of the drown down button's menu and add its image

    NSImage *actionImage = [NSImage imageNamed:NSImageNameActionTemplate];

    actionImage.size = NSMakeSize(10,10);

    NSMenuItem *menuItem = [[NSMenuItem alloc] initWithTitle:@"" action:nil keyEquivalent:@""];

    [self.actionButton.menu insertItem:menuItem atIndex:0];

    menuItem.image = actionImage;

    [self.actionButton.menu setAutoenablesItems:NO];

    // start off by disabling the Edit... menu item until we are notified of a selection

    self.editBookmarkMenuItem.enabled = NO;

    // truncate to the middle if the url is too long to fit

    self.urlField.cell.lineBreakMode = NSLineBreakByTruncatingMiddle;

}

// -------------------------------------------------------------------------------

//  viewWillAppear

// -------------------------------------------------------------------------------

- (void)viewWillAppear

{

    [super viewWillAppear];

    // listen for selection changes from the NSOutlineView inside MyOutlineViewController

    // note: we start observing after our outline view is populated so we don't receive unnecessary notifications at startup

    //

    [[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(selectionDidChange:)

                                                 name:NSOutlineViewSelectionDidChangeNotification

                                               object:nil];

    // notification so we know when the icon view controller is done populating its content

    [[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(contentReceived:)

                                                 name:kReceivedContentNotification

                                               object:nil];

}

// -------------------------------------------------------------------------------

//  dealloc

// -------------------------------------------------------------------------------

- (void)dealloc

{

    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSOutlineViewSelectionDidChangeNotification object:nil];

    [[NSNotificationCenter defaultCenter] removeObserver:self name:kReceivedContentNotification object:nil];

}

#pragma mark - NSNotifications

// -------------------------------------------------------------------------------

//  contentReceived:notif

//

//  Notification sent from IconViewController class,

//  indicating the file system content has been received

// -------------------------------------------------------------------------------

- (void)contentReceived:(NSNotification *)notif

{

    self.progIndicator.hidden = YES;

    [self.progIndicator stopAnimation:self];

}

// -------------------------------------------------------------------------------

//  Listens for changes outline view row selection

// -------------------------------------------------------------------------------

- (void)selectionDidChange:(NSNotification *)notification

{

    // examine the current selection and adjust the UI

    //

    NSOutlineView *outlineView = notification.object;

    NSInteger selectedRow = outlineView.selectedRow;

    if (selectedRow == -1)

    {

        // there is no current selection - no item to display

        self.removeButton.enabled = NO;

        self.urlField.stringValue = @"";

        self.editBookmarkMenuItem.enabled = NO;

    }

    else

    {

        // single selection only

        self.removeButton.enabled = YES;

        // report the URL to our NSTextField

        BaseNode *item = [[outlineView itemAtRow:selectedRow] representedObject];

        if (item.isBookmark)

        {

            self.urlField.stringValue = (item.url != nil) ? item.url.absoluteString : @"";

        }

        else

        {

            self.urlField.stringValue = (item.url != nil) ? item.url.path : @"";

        }

        // enable the Edit... menu item if the selected node is a bookmark

        self.editBookmarkMenuItem.enabled = (item.url != nil) && !item.url.fileURL;

        if (item.isDirectory)

        {

            // we are populating the detail view controler with contents of a folder on disk

            // (may take a while)

            self.progIndicator.hidden = NO;

        }

    }

}

#pragma mark - Folders

// -------------------------------------------------------------------------------

//  addFolderAction:sender:

// -------------------------------------------------------------------------------

- (IBAction)addFolderAction:(id)sender

{

    // post notification to MyOutlineViewController to add a new folder

    [[NSNotificationCenter defaultCenter] postNotificationName:kAddFolderNotification object:nil];

}

// -------------------------------------------------------------------------------

//  removeFolderAction:sender:

// -------------------------------------------------------------------------------

- (IBAction)removeFolderAction:(id)sender

{

    NSAlert *alert = [[NSAlert alloc] init];

    alert.messageText = NSLocalizedString(@"Are you sure you want to remove this item?", @"");

    [alert addButtonWithTitle:NSLocalizedString(@"OK", @"")];

    [alert addButtonWithTitle:NSLocalizedString(@"Cancel", @"")];

    [alert beginSheetModalForWindow:self.view.window completionHandler:^(NSModalResponse returnCode) {

        if (returnCode == NSAlertFirstButtonReturn)

        {

            // post notification to MyOutlineViewController to remove the selected folder

            [[NSNotificationCenter defaultCenter] postNotificationName:kRemoveFolderNotification object:nil];

        }

    }];

}

#pragma mark - Bookmarks

// -------------------------------------------------------------------------------

//  addBookmarkAction:sender

// -------------------------------------------------------------------------------

- (IBAction)addBookmarkAction:(id)sender

{

    // post notification to MyOutlineViewController to add a new bookmark

    [[NSNotificationCenter defaultCenter] postNotificationName:kAddBookmarkNotification object:nil];

}

// -------------------------------------------------------------------------------

//  editChildAction:sender

// -------------------------------------------------------------------------------

- (IBAction)editBookmarkAction:(id)sender

{

    // post notification to MyOutlineViewController to edit a selected bookmark

    [[NSNotificationCenter defaultCenter] postNotificationName:kEditBookmarkNotification object:nil];

}

@end