/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Application Controller object, and the NSBrowser delegate. An instance of this object is in the MainMenu.xib.

 */

#import "AppController.h"

#import "FileSystemNode.h"

@interface AppController ()

// please note bug #24527817

// NSBrowser column titles draw sporadic when navigating back with left arrow key (10.11)

//

@property (weak) IBOutlet NSBrowser *browser;

@property (strong) FileSystemNode *rootNode;

@end

#pragma mark -

@implementation AppController

#pragma mark - NSBrowserDelegate

// This method is optional, but makes the code much easier to understand

//

- (id)rootItemForBrowser:(NSBrowser *)browser {

    if (self.rootNode == nil) {

        _rootNode = [[FileSystemNode alloc] initWithURL:[NSURL fileURLWithPath:NSOpenStepRootDirectory()]];

    }

    return self.rootNode;

}

- (NSInteger)browser:(NSBrowser *)browser numberOfChildrenOfItem:(id)item {

    FileSystemNode *node = (FileSystemNode *)item;

    return node.children.count;

}

- (id)browser:(NSBrowser *)browser child:(NSInteger)index ofItem:(id)item {

    FileSystemNode *node = (FileSystemNode *)item;

    return [node.children objectAtIndex:index];

}

- (BOOL)browser:(NSBrowser *)browser isLeafItem:(id)item {

    FileSystemNode *node = (FileSystemNode *)item;

    return !node.isDirectory || node.isPackage; // take into account packaged apps and documents

}

- (id)browser:(NSBrowser *)browser objectValueForItem:(id)item {

    FileSystemNode *node = (FileSystemNode *)item;

    return node.displayName;

}

@end