// Copyright GreenKeeper Software 2005

#import "LogController.h"
#import "Preferences.h"

// Responsible for connecting the Log model to the interface
@implementation LogController

- (id)init {
	[super init];
	
	// Initialize the model
	log = [[Log alloc] init];
	
	// Listen to see if the log has been updated
	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(updateLog:) name:@"logUpdated" object:nil];	
	
	return self;
}

- (void)awakeFromNib {
		
	// Grab the text storage from logView
	logStorage = [logView textStorage];
		
	// Helps with "autoscrolloing" - Makes sure logView is scrolled all the way to the bottom to start with
	[[[logView enclosingScrollView] verticalScroller] setFloatValue:1.0];
	
	// Sets the name which will be used to remember the location of the log window from launch to launch
	[logWindow setFrameUsingName:@"LogWindow"];	
	
	// Open the log window on launch if the preferences indicate to do so 
	if([[Preferences prefs] boolForKey:@"displayLogOnAppLaunch"])
		[self displayLog:self];
}

- (void)dealloc {
	
	// Release all local variables
	[log release];
	[logStorage release];
	
	// Eliminated listeners
	[[NSNotificationCenter defaultCenter] removeObserver:self];
	
	[super dealloc];
}

// Displays the log window
- (IBAction)displayLog:(id)sender {
	[NSApp activateIgnoringOtherApps:YES];
	[logWindow makeKeyAndOrderFront:self];
	[self updateLog:nil];
}

// Places standard output into the log window
- (void)updateLog:(NSNotification *)notification {

	if(![logWindow isVisible]) return;

	// Set a flag to remember whether or not the logView was scrolled all the way to the bottom
	BOOL scrollerWasAtBottom = [[[logView enclosingScrollView] verticalScroller] floatValue] == 1.0;
	
	// Replace whatever is in the log with the log string sent by the model
	[logStorage replaceCharactersInRange:NSMakeRange(0, [logStorage length]) withString:[log currentLog]];

	// Scroll to the end of the log if scroller was at the bottom when we started
	if(scrollerWasAtBottom) [logView scrollRangeToVisible:NSMakeRange([logStorage length], 0)];	
}

// The following two methods save the position and size of the log window
- (void)windowDidMove:(NSNotification *)aNotification
{
    [logWindow saveFrameUsingName:@"LogWindow"];
}

- (void)windowDidResize:(NSNotification *)aNotification
{
    [logWindow saveFrameUsingName:@"LogWindow"];
}

@end